1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2014 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size, bool big_endian>
51 class Output_data_plt_powerpc;
53 template<int size, bool big_endian>
54 class Output_data_brlt_powerpc;
56 template<int size, bool big_endian>
57 class Output_data_got_powerpc;
59 template<int size, bool big_endian>
60 class Output_data_glink;
62 template<int size, bool big_endian>
65 template<int size, bool big_endian>
68 struct Stub_table_owner
70 Output_section* output_section;
71 const Output_section::Input_section* owner;
75 is_branch_reloc(unsigned int r_type);
77 template<int size, bool big_endian>
78 class Powerpc_relobj : public Sized_relobj_file<size, big_endian>
81 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
82 typedef Unordered_set<Section_id, Section_id_hash> Section_refs;
83 typedef Unordered_map<Address, Section_refs> Access_from;
85 Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset,
86 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
87 : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
88 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
89 opd_ent_(), access_from_map_(), has14_(), stub_table_index_(),
90 e_flags_(ehdr.get_e_flags()), st_other_()
92 this->set_abiversion(0);
98 // Read the symbols then set up st_other vector.
100 do_read_symbols(Read_symbols_data*);
102 // The .got2 section shndx.
107 return this->special_;
112 // The .opd section shndx.
119 return this->special_;
122 // Init OPD entry arrays.
124 init_opd(size_t opd_size)
126 size_t count = this->opd_ent_ndx(opd_size);
127 this->opd_ent_.resize(count);
130 // Return section and offset of function entry for .opd + R_OFF.
132 get_opd_ent(Address r_off, Address* value = NULL) const
134 size_t ndx = this->opd_ent_ndx(r_off);
135 gold_assert(ndx < this->opd_ent_.size());
136 gold_assert(this->opd_ent_[ndx].shndx != 0);
138 *value = this->opd_ent_[ndx].off;
139 return this->opd_ent_[ndx].shndx;
142 // Set section and offset of function entry for .opd + R_OFF.
144 set_opd_ent(Address r_off, unsigned int shndx, Address value)
146 size_t ndx = this->opd_ent_ndx(r_off);
147 gold_assert(ndx < this->opd_ent_.size());
148 this->opd_ent_[ndx].shndx = shndx;
149 this->opd_ent_[ndx].off = value;
152 // Return discard flag for .opd + R_OFF.
154 get_opd_discard(Address r_off) const
156 size_t ndx = this->opd_ent_ndx(r_off);
157 gold_assert(ndx < this->opd_ent_.size());
158 return this->opd_ent_[ndx].discard;
161 // Set discard flag for .opd + R_OFF.
163 set_opd_discard(Address r_off)
165 size_t ndx = this->opd_ent_ndx(r_off);
166 gold_assert(ndx < this->opd_ent_.size());
167 this->opd_ent_[ndx].discard = true;
172 { return this->opd_valid_; }
176 { this->opd_valid_ = true; }
178 // Examine .rela.opd to build info about function entry points.
180 scan_opd_relocs(size_t reloc_count,
181 const unsigned char* prelocs,
182 const unsigned char* plocal_syms);
184 // Perform the Sized_relobj_file method, then set up opd info from
187 do_read_relocs(Read_relocs_data*);
190 do_find_special_sections(Read_symbols_data* sd);
192 // Adjust this local symbol value. Return false if the symbol
193 // should be discarded from the output file.
195 do_adjust_local_symbol(Symbol_value<size>* lv) const
197 if (size == 64 && this->opd_shndx() != 0)
200 if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
202 if (this->get_opd_discard(lv->input_value()))
210 { return &this->access_from_map_; }
212 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
213 // section at DST_OFF.
215 add_reference(Object* src_obj,
216 unsigned int src_indx,
217 typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
219 Section_id src_id(src_obj, src_indx);
220 this->access_from_map_[dst_off].insert(src_id);
223 // Add a reference to the code section specified by the .opd entry
226 add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
228 size_t ndx = this->opd_ent_ndx(dst_off);
229 if (ndx >= this->opd_ent_.size())
230 this->opd_ent_.resize(ndx + 1);
231 this->opd_ent_[ndx].gc_mark = true;
235 process_gc_mark(Symbol_table* symtab)
237 for (size_t i = 0; i < this->opd_ent_.size(); i++)
238 if (this->opd_ent_[i].gc_mark)
240 unsigned int shndx = this->opd_ent_[i].shndx;
241 symtab->gc()->worklist().push(Section_id(this, shndx));
245 // Return offset in output GOT section that this object will use
246 // as a TOC pointer. Won't be just a constant with multi-toc support.
248 toc_base_offset() const
252 set_has_small_toc_reloc()
253 { has_small_toc_reloc_ = true; }
256 has_small_toc_reloc() const
257 { return has_small_toc_reloc_; }
260 set_has_14bit_branch(unsigned int shndx)
262 if (shndx >= this->has14_.size())
263 this->has14_.resize(shndx + 1);
264 this->has14_[shndx] = true;
268 has_14bit_branch(unsigned int shndx) const
269 { return shndx < this->has14_.size() && this->has14_[shndx]; }
272 set_stub_table(unsigned int shndx, unsigned int stub_index)
274 if (shndx >= this->stub_table_index_.size())
275 this->stub_table_index_.resize(shndx + 1);
276 this->stub_table_index_[shndx] = stub_index;
279 Stub_table<size, big_endian>*
280 stub_table(unsigned int shndx)
282 if (shndx < this->stub_table_index_.size())
284 Target_powerpc<size, big_endian>* target
285 = static_cast<Target_powerpc<size, big_endian>*>(
286 parameters->sized_target<size, big_endian>());
287 unsigned int indx = this->stub_table_index_[shndx];
288 gold_assert(indx < target->stub_tables().size());
289 return target->stub_tables()[indx];
297 this->stub_table_index_.clear();
302 { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
304 // Set ABI version for input and output
306 set_abiversion(int ver);
309 ppc64_local_entry_offset(const Symbol* sym) const
310 { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); }
313 ppc64_local_entry_offset(unsigned int symndx) const
314 { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); }
325 // Return index into opd_ent_ array for .opd entry at OFF.
326 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
327 // apart when the language doesn't use the last 8-byte word, the
328 // environment pointer. Thus dividing the entry section offset by
329 // 16 will give an index into opd_ent_ that works for either layout
330 // of .opd. (It leaves some elements of the vector unused when .opd
331 // entries are spaced 24 bytes apart, but we don't know the spacing
332 // until relocations are processed, and in any case it is possible
333 // for an object to have some entries spaced 16 bytes apart and
334 // others 24 bytes apart.)
336 opd_ent_ndx(size_t off) const
339 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
340 unsigned int special_;
342 // For 64-bit, whether this object uses small model relocs to access
344 bool has_small_toc_reloc_;
346 // Set at the start of gc_process_relocs, when we know opd_ent_
347 // vector is valid. The flag could be made atomic and set in
348 // do_read_relocs with memory_order_release and then tested with
349 // memory_order_acquire, potentially resulting in fewer entries in
353 // The first 8-byte word of an OPD entry gives the address of the
354 // entry point of the function. Relocatable object files have a
355 // relocation on this word. The following vector records the
356 // section and offset specified by these relocations.
357 std::vector<Opd_ent> opd_ent_;
359 // References made to this object's .opd section when running
360 // gc_process_relocs for another object, before the opd_ent_ vector
361 // is valid for this object.
362 Access_from access_from_map_;
364 // Whether input section has a 14-bit branch reloc.
365 std::vector<bool> has14_;
367 // The stub table to use for a given input section.
368 std::vector<unsigned int> stub_table_index_;
371 elfcpp::Elf_Word e_flags_;
373 // ELF st_other field for local symbols.
374 std::vector<unsigned char> st_other_;
377 template<int size, bool big_endian>
378 class Powerpc_dynobj : public Sized_dynobj<size, big_endian>
381 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
383 Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset,
384 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
385 : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr),
386 opd_shndx_(0), opd_ent_(), e_flags_(ehdr.get_e_flags())
388 this->set_abiversion(0);
394 // Call Sized_dynobj::do_read_symbols to read the symbols then
395 // read .opd from a dynamic object, filling in opd_ent_ vector,
397 do_read_symbols(Read_symbols_data*);
399 // The .opd section shndx.
403 return this->opd_shndx_;
406 // The .opd section address.
410 return this->opd_address_;
413 // Init OPD entry arrays.
415 init_opd(size_t opd_size)
417 size_t count = this->opd_ent_ndx(opd_size);
418 this->opd_ent_.resize(count);
421 // Return section and offset of function entry for .opd + R_OFF.
423 get_opd_ent(Address r_off, Address* value = NULL) const
425 size_t ndx = this->opd_ent_ndx(r_off);
426 gold_assert(ndx < this->opd_ent_.size());
427 gold_assert(this->opd_ent_[ndx].shndx != 0);
429 *value = this->opd_ent_[ndx].off;
430 return this->opd_ent_[ndx].shndx;
433 // Set section and offset of function entry for .opd + R_OFF.
435 set_opd_ent(Address r_off, unsigned int shndx, Address value)
437 size_t ndx = this->opd_ent_ndx(r_off);
438 gold_assert(ndx < this->opd_ent_.size());
439 this->opd_ent_[ndx].shndx = shndx;
440 this->opd_ent_[ndx].off = value;
445 { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
447 // Set ABI version for input and output.
449 set_abiversion(int ver);
452 // Used to specify extent of executable sections.
455 Sec_info(Address start_, Address len_, unsigned int shndx_)
456 : start(start_), len(len_), shndx(shndx_)
460 operator<(const Sec_info& that) const
461 { return this->start < that.start; }
474 // Return index into opd_ent_ array for .opd entry at OFF.
476 opd_ent_ndx(size_t off) const
479 // For 64-bit the .opd section shndx and address.
480 unsigned int opd_shndx_;
481 Address opd_address_;
483 // The first 8-byte word of an OPD entry gives the address of the
484 // entry point of the function. Records the section and offset
485 // corresponding to the address. Note that in dynamic objects,
486 // offset is *not* relative to the section.
487 std::vector<Opd_ent> opd_ent_;
490 elfcpp::Elf_Word e_flags_;
493 template<int size, bool big_endian>
494 class Target_powerpc : public Sized_target<size, big_endian>
498 Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
499 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
500 typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
501 static const Address invalid_address = static_cast<Address>(0) - 1;
502 // Offset of tp and dtp pointers from start of TLS block.
503 static const Address tp_offset = 0x7000;
504 static const Address dtp_offset = 0x8000;
507 : Sized_target<size, big_endian>(&powerpc_info),
508 got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL),
509 glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY),
510 tlsld_got_offset_(-1U),
511 stub_tables_(), branch_lookup_table_(), branch_info_(),
512 plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0),
517 // Process the relocations to determine unreferenced sections for
518 // garbage collection.
520 gc_process_relocs(Symbol_table* symtab,
522 Sized_relobj_file<size, big_endian>* object,
523 unsigned int data_shndx,
524 unsigned int sh_type,
525 const unsigned char* prelocs,
527 Output_section* output_section,
528 bool needs_special_offset_handling,
529 size_t local_symbol_count,
530 const unsigned char* plocal_symbols);
532 // Scan the relocations to look for symbol adjustments.
534 scan_relocs(Symbol_table* symtab,
536 Sized_relobj_file<size, big_endian>* object,
537 unsigned int data_shndx,
538 unsigned int sh_type,
539 const unsigned char* prelocs,
541 Output_section* output_section,
542 bool needs_special_offset_handling,
543 size_t local_symbol_count,
544 const unsigned char* plocal_symbols);
546 // Map input .toc section to output .got section.
548 do_output_section_name(const Relobj*, const char* name, size_t* plen) const
550 if (size == 64 && strcmp(name, ".toc") == 0)
558 // Provide linker defined save/restore functions.
560 define_save_restore_funcs(Layout*, Symbol_table*);
562 // No stubs unless a final link.
565 { return !parameters->options().relocatable(); }
568 do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
571 do_plt_fde_location(const Output_data*, unsigned char*,
572 uint64_t*, off_t*) const;
574 // Stash info about branches, for stub generation.
576 push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
577 unsigned int data_shndx, Address r_offset,
578 unsigned int r_type, unsigned int r_sym, Address addend)
580 Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
581 this->branch_info_.push_back(info);
582 if (r_type == elfcpp::R_POWERPC_REL14
583 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
584 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
585 ppc_object->set_has_14bit_branch(data_shndx);
589 do_define_standard_symbols(Symbol_table*, Layout*);
591 // Finalize the sections.
593 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
595 // Return the value to use for a dynamic which requires special
598 do_dynsym_value(const Symbol*) const;
600 // Return the PLT address to use for a local symbol.
602 do_plt_address_for_local(const Relobj*, unsigned int) const;
604 // Return the PLT address to use for a global symbol.
606 do_plt_address_for_global(const Symbol*) const;
608 // Return the offset to use for the GOT_INDX'th got entry which is
609 // for a local tls symbol specified by OBJECT, SYMNDX.
611 do_tls_offset_for_local(const Relobj* object,
613 unsigned int got_indx) const;
615 // Return the offset to use for the GOT_INDX'th got entry which is
616 // for global tls symbol GSYM.
618 do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
621 do_function_location(Symbol_location*) const;
624 do_can_check_for_function_pointers() const
627 // Relocate a section.
629 relocate_section(const Relocate_info<size, big_endian>*,
630 unsigned int sh_type,
631 const unsigned char* prelocs,
633 Output_section* output_section,
634 bool needs_special_offset_handling,
636 Address view_address,
637 section_size_type view_size,
638 const Reloc_symbol_changes*);
640 // Scan the relocs during a relocatable link.
642 scan_relocatable_relocs(Symbol_table* symtab,
644 Sized_relobj_file<size, big_endian>* object,
645 unsigned int data_shndx,
646 unsigned int sh_type,
647 const unsigned char* prelocs,
649 Output_section* output_section,
650 bool needs_special_offset_handling,
651 size_t local_symbol_count,
652 const unsigned char* plocal_symbols,
653 Relocatable_relocs*);
655 // Emit relocations for a section.
657 relocate_relocs(const Relocate_info<size, big_endian>*,
658 unsigned int sh_type,
659 const unsigned char* prelocs,
661 Output_section* output_section,
662 typename elfcpp::Elf_types<size>::Elf_Off
663 offset_in_output_section,
664 const Relocatable_relocs*,
666 Address view_address,
668 unsigned char* reloc_view,
669 section_size_type reloc_view_size);
671 // Return whether SYM is defined by the ABI.
673 do_is_defined_by_abi(const Symbol* sym) const
675 return strcmp(sym->name(), "__tls_get_addr") == 0;
678 // Return the size of the GOT section.
682 gold_assert(this->got_ != NULL);
683 return this->got_->data_size();
686 // Get the PLT section.
687 const Output_data_plt_powerpc<size, big_endian>*
690 gold_assert(this->plt_ != NULL);
694 // Get the IPLT section.
695 const Output_data_plt_powerpc<size, big_endian>*
698 gold_assert(this->iplt_ != NULL);
702 // Get the .glink section.
703 const Output_data_glink<size, big_endian>*
704 glink_section() const
706 gold_assert(this->glink_ != NULL);
710 Output_data_glink<size, big_endian>*
713 gold_assert(this->glink_ != NULL);
717 bool has_glink() const
718 { return this->glink_ != NULL; }
720 // Get the GOT section.
721 const Output_data_got_powerpc<size, big_endian>*
724 gold_assert(this->got_ != NULL);
728 // Get the GOT section, creating it if necessary.
729 Output_data_got_powerpc<size, big_endian>*
730 got_section(Symbol_table*, Layout*);
733 do_make_elf_object(const std::string&, Input_file*, off_t,
734 const elfcpp::Ehdr<size, big_endian>&);
736 // Return the number of entries in the GOT.
738 got_entry_count() const
740 if (this->got_ == NULL)
742 return this->got_size() / (size / 8);
745 // Return the number of entries in the PLT.
747 plt_entry_count() const;
749 // Return the offset of the first non-reserved PLT entry.
751 first_plt_entry_offset() const
755 if (this->abiversion() >= 2)
760 // Return the size of each PLT entry.
762 plt_entry_size() const
766 if (this->abiversion() >= 2)
771 // Add any special sections for this symbol to the gc work list.
772 // For powerpc64, this adds the code section of a function
775 do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
777 // Handle target specific gc actions when adding a gc reference from
778 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
779 // and DST_OFF. For powerpc64, this adds a referenc to the code
780 // section of a function descriptor.
782 do_gc_add_reference(Symbol_table* symtab,
784 unsigned int src_shndx,
786 unsigned int dst_shndx,
787 Address dst_off) const;
789 typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
792 { return this->stub_tables_; }
794 const Output_data_brlt_powerpc<size, big_endian>*
796 { return this->brlt_section_; }
799 add_branch_lookup_table(Address to)
801 unsigned int off = this->branch_lookup_table_.size() * (size / 8);
802 this->branch_lookup_table_.insert(std::make_pair(to, off));
806 find_branch_lookup_table(Address to)
808 typename Branch_lookup_table::const_iterator p
809 = this->branch_lookup_table_.find(to);
810 return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
814 write_branch_lookup_table(unsigned char *oview)
816 for (typename Branch_lookup_table::const_iterator p
817 = this->branch_lookup_table_.begin();
818 p != this->branch_lookup_table_.end();
821 elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first);
826 plt_thread_safe() const
827 { return this->plt_thread_safe_; }
831 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; }
834 set_abiversion (int ver)
836 elfcpp::Elf_Word flags = this->processor_specific_flags();
837 flags &= ~elfcpp::EF_PPC64_ABI;
838 flags |= ver & elfcpp::EF_PPC64_ABI;
839 this->set_processor_specific_flags(flags);
842 // Offset to to save stack slot
845 { return this->abiversion() < 2 ? 40 : 24; }
861 : tls_get_addr_(NOT_EXPECTED),
862 relinfo_(NULL), relnum_(0), r_offset_(0)
867 if (this->tls_get_addr_ != NOT_EXPECTED)
874 if (this->relinfo_ != NULL)
875 gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_,
876 _("missing expected __tls_get_addr call"));
880 expect_tls_get_addr_call(
881 const Relocate_info<size, big_endian>* relinfo,
885 this->tls_get_addr_ = EXPECTED;
886 this->relinfo_ = relinfo;
887 this->relnum_ = relnum;
888 this->r_offset_ = r_offset;
892 expect_tls_get_addr_call()
893 { this->tls_get_addr_ = EXPECTED; }
896 skip_next_tls_get_addr_call()
897 {this->tls_get_addr_ = SKIP; }
900 maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym)
902 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
903 || r_type == elfcpp::R_PPC_PLTREL24)
905 && strcmp(gsym->name(), "__tls_get_addr") == 0);
906 Tls_get_addr last_tls = this->tls_get_addr_;
907 this->tls_get_addr_ = NOT_EXPECTED;
908 if (is_tls_call && last_tls != EXPECTED)
910 else if (!is_tls_call && last_tls != NOT_EXPECTED)
919 // What we're up to regarding calls to __tls_get_addr.
920 // On powerpc, the branch and link insn making a call to
921 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
922 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
923 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
924 // The marker relocation always comes first, and has the same
925 // symbol as the reloc on the insn setting up the __tls_get_addr
926 // argument. This ties the arg setup insn with the call insn,
927 // allowing ld to safely optimize away the call. We check that
928 // every call to __tls_get_addr has a marker relocation, and that
929 // every marker relocation is on a call to __tls_get_addr.
930 Tls_get_addr tls_get_addr_;
931 // Info about the last reloc for error message.
932 const Relocate_info<size, big_endian>* relinfo_;
937 // The class which scans relocations.
938 class Scan : protected Track_tls
941 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
944 : Track_tls(), issued_non_pic_error_(false)
948 get_reference_flags(unsigned int r_type, const Target_powerpc* target);
951 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
952 Sized_relobj_file<size, big_endian>* object,
953 unsigned int data_shndx,
954 Output_section* output_section,
955 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
956 const elfcpp::Sym<size, big_endian>& lsym,
960 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
961 Sized_relobj_file<size, big_endian>* object,
962 unsigned int data_shndx,
963 Output_section* output_section,
964 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
968 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
970 Sized_relobj_file<size, big_endian>* relobj,
973 const elfcpp::Rela<size, big_endian>& ,
975 const elfcpp::Sym<size, big_endian>&)
977 // PowerPC64 .opd is not folded, so any identical function text
978 // may be folded and we'll still keep function addresses distinct.
979 // That means no reloc is of concern here.
982 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
983 <Powerpc_relobj<size, big_endian>*>(relobj);
984 if (ppcobj->abiversion() == 1)
987 // For 32-bit and ELFv2, conservatively assume anything but calls to
988 // function code might be taking the address of the function.
989 return !is_branch_reloc(r_type);
993 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
995 Sized_relobj_file<size, big_endian>* relobj,
998 const elfcpp::Rela<size, big_endian>& ,
1005 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
1006 <Powerpc_relobj<size, big_endian>*>(relobj);
1007 if (ppcobj->abiversion() == 1)
1010 return !is_branch_reloc(r_type);
1014 reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target,
1015 Sized_relobj_file<size, big_endian>* object,
1016 unsigned int r_type, bool report_err);
1020 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
1021 unsigned int r_type);
1024 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
1025 unsigned int r_type, Symbol*);
1028 generate_tls_call(Symbol_table* symtab, Layout* layout,
1029 Target_powerpc* target);
1032 check_non_pic(Relobj*, unsigned int r_type);
1034 // Whether we have issued an error about a non-PIC compilation.
1035 bool issued_non_pic_error_;
1039 symval_for_branch(const Symbol_table* symtab,
1040 const Sized_symbol<size>* gsym,
1041 Powerpc_relobj<size, big_endian>* object,
1042 Address *value, unsigned int *dest_shndx);
1044 // The class which implements relocation.
1045 class Relocate : protected Track_tls
1048 // Use 'at' branch hints when true, 'y' when false.
1049 // FIXME maybe: set this with an option.
1050 static const bool is_isa_v2 = true;
1056 // Do a relocation. Return false if the caller should not issue
1057 // any warnings about this relocation.
1059 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
1060 Output_section*, size_t relnum,
1061 const elfcpp::Rela<size, big_endian>&,
1062 unsigned int r_type, const Sized_symbol<size>*,
1063 const Symbol_value<size>*,
1065 typename elfcpp::Elf_types<size>::Elf_Addr,
1069 class Relocate_comdat_behavior
1072 // Decide what the linker should do for relocations that refer to
1073 // discarded comdat sections.
1074 inline Comdat_behavior
1075 get(const char* name)
1077 gold::Default_comdat_behavior default_behavior;
1078 Comdat_behavior ret = default_behavior.get(name);
1079 if (ret == CB_WARNING)
1082 && (strcmp(name, ".fixup") == 0
1083 || strcmp(name, ".got2") == 0))
1086 && (strcmp(name, ".opd") == 0
1087 || strcmp(name, ".toc") == 0
1088 || strcmp(name, ".toc1") == 0))
1095 // A class which returns the size required for a relocation type,
1096 // used while scanning relocs during a relocatable link.
1097 class Relocatable_size_for_reloc
1101 get_size_for_reloc(unsigned int, Relobj*)
1108 // Optimize the TLS relocation type based on what we know about the
1109 // symbol. IS_FINAL is true if the final address of this symbol is
1110 // known at link time.
1112 tls::Tls_optimization
1113 optimize_tls_gd(bool is_final)
1115 // If we are generating a shared library, then we can't do anything
1117 if (parameters->options().shared())
1118 return tls::TLSOPT_NONE;
1121 return tls::TLSOPT_TO_IE;
1122 return tls::TLSOPT_TO_LE;
1125 tls::Tls_optimization
1128 if (parameters->options().shared())
1129 return tls::TLSOPT_NONE;
1131 return tls::TLSOPT_TO_LE;
1134 tls::Tls_optimization
1135 optimize_tls_ie(bool is_final)
1137 if (!is_final || parameters->options().shared())
1138 return tls::TLSOPT_NONE;
1140 return tls::TLSOPT_TO_LE;
1145 make_glink_section(Layout*);
1147 // Create the PLT section.
1149 make_plt_section(Symbol_table*, Layout*);
1152 make_iplt_section(Symbol_table*, Layout*);
1155 make_brlt_section(Layout*);
1157 // Create a PLT entry for a global symbol.
1159 make_plt_entry(Symbol_table*, Layout*, Symbol*);
1161 // Create a PLT entry for a local IFUNC symbol.
1163 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
1164 Sized_relobj_file<size, big_endian>*,
1168 // Create a GOT entry for local dynamic __tls_get_addr.
1170 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
1171 Sized_relobj_file<size, big_endian>* object);
1174 tlsld_got_offset() const
1176 return this->tlsld_got_offset_;
1179 // Get the dynamic reloc section, creating it if necessary.
1181 rela_dyn_section(Layout*);
1183 // Similarly, but for ifunc symbols get the one for ifunc.
1185 rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc);
1187 // Copy a relocation against a global symbol.
1189 copy_reloc(Symbol_table* symtab, Layout* layout,
1190 Sized_relobj_file<size, big_endian>* object,
1191 unsigned int shndx, Output_section* output_section,
1192 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
1194 this->copy_relocs_.copy_reloc(symtab, layout,
1195 symtab->get_sized_symbol<size>(sym),
1196 object, shndx, output_section,
1197 reloc, this->rela_dyn_section(layout));
1200 // Look over all the input sections, deciding where to place stubs.
1202 group_sections(Layout*, const Task*, bool);
1204 // Sort output sections by address.
1205 struct Sort_sections
1208 operator()(const Output_section* sec1, const Output_section* sec2)
1209 { return sec1->address() < sec2->address(); }
1215 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
1216 unsigned int data_shndx,
1218 unsigned int r_type,
1221 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
1222 r_type_(r_type), r_sym_(r_sym), addend_(addend)
1228 // If this branch needs a plt call stub, or a long branch stub, make one.
1230 make_stub(Stub_table<size, big_endian>*,
1231 Stub_table<size, big_endian>*,
1232 Symbol_table*) const;
1235 // The branch location..
1236 Powerpc_relobj<size, big_endian>* object_;
1237 unsigned int shndx_;
1239 // ..and the branch type and destination.
1240 unsigned int r_type_;
1241 unsigned int r_sym_;
1245 // Information about this specific target which we pass to the
1246 // general Target structure.
1247 static Target::Target_info powerpc_info;
1249 // The types of GOT entries needed for this platform.
1250 // These values are exposed to the ABI in an incremental link.
1251 // Do not renumber existing values without changing the version
1252 // number of the .gnu_incremental_inputs section.
1256 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
1257 GOT_TYPE_DTPREL, // entry for @got@dtprel
1258 GOT_TYPE_TPREL // entry for @got@tprel
1262 Output_data_got_powerpc<size, big_endian>* got_;
1263 // The PLT section. This is a container for a table of addresses,
1264 // and their relocations. Each address in the PLT has a dynamic
1265 // relocation (R_*_JMP_SLOT) and each address will have a
1266 // corresponding entry in .glink for lazy resolution of the PLT.
1267 // ppc32 initialises the PLT to point at the .glink entry, while
1268 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1269 // linker adds a stub that loads the PLT entry into ctr then
1270 // branches to ctr. There may be more than one stub for each PLT
1271 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1272 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1273 Output_data_plt_powerpc<size, big_endian>* plt_;
1274 // The IPLT section. Like plt_, this is a container for a table of
1275 // addresses and their relocations, specifically for STT_GNU_IFUNC
1276 // functions that resolve locally (STT_GNU_IFUNC functions that
1277 // don't resolve locally go in PLT). Unlike plt_, these have no
1278 // entry in .glink for lazy resolution, and the relocation section
1279 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1280 // the relocation section may contain relocations against
1281 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1282 // relocation section will appear at the end of other dynamic
1283 // relocations, so that ld.so applies these relocations after other
1284 // dynamic relocations. In a static executable, the relocation
1285 // section is emitted and marked with __rela_iplt_start and
1286 // __rela_iplt_end symbols.
1287 Output_data_plt_powerpc<size, big_endian>* iplt_;
1288 // Section holding long branch destinations.
1289 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
1290 // The .glink section.
1291 Output_data_glink<size, big_endian>* glink_;
1292 // The dynamic reloc section.
1293 Reloc_section* rela_dyn_;
1294 // Relocs saved to avoid a COPY reloc.
1295 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
1296 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1297 unsigned int tlsld_got_offset_;
1299 Stub_tables stub_tables_;
1300 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
1301 Branch_lookup_table branch_lookup_table_;
1303 typedef std::vector<Branch_info> Branches;
1304 Branches branch_info_;
1306 bool plt_thread_safe_;
1309 int relax_fail_count_;
1310 int32_t stub_group_size_;
1314 Target::Target_info Target_powerpc<32, true>::powerpc_info =
1317 true, // is_big_endian
1318 elfcpp::EM_PPC, // machine_code
1319 false, // has_make_symbol
1320 false, // has_resolve
1321 false, // has_code_fill
1322 true, // is_default_stack_executable
1323 false, // can_icf_inline_merge_sections
1325 "/usr/lib/ld.so.1", // dynamic_linker
1326 0x10000000, // default_text_segment_address
1327 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1328 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1329 false, // isolate_execinstr
1331 elfcpp::SHN_UNDEF, // small_common_shndx
1332 elfcpp::SHN_UNDEF, // large_common_shndx
1333 0, // small_common_section_flags
1334 0, // large_common_section_flags
1335 NULL, // attributes_section
1336 NULL, // attributes_vendor
1337 "_start" // entry_symbol_name
1341 Target::Target_info Target_powerpc<32, false>::powerpc_info =
1344 false, // is_big_endian
1345 elfcpp::EM_PPC, // machine_code
1346 false, // has_make_symbol
1347 false, // has_resolve
1348 false, // has_code_fill
1349 true, // is_default_stack_executable
1350 false, // can_icf_inline_merge_sections
1352 "/usr/lib/ld.so.1", // dynamic_linker
1353 0x10000000, // default_text_segment_address
1354 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1355 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1356 false, // isolate_execinstr
1358 elfcpp::SHN_UNDEF, // small_common_shndx
1359 elfcpp::SHN_UNDEF, // large_common_shndx
1360 0, // small_common_section_flags
1361 0, // large_common_section_flags
1362 NULL, // attributes_section
1363 NULL, // attributes_vendor
1364 "_start" // entry_symbol_name
1368 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1371 true, // is_big_endian
1372 elfcpp::EM_PPC64, // machine_code
1373 false, // has_make_symbol
1374 false, // has_resolve
1375 false, // has_code_fill
1376 true, // is_default_stack_executable
1377 false, // can_icf_inline_merge_sections
1379 "/usr/lib/ld.so.1", // dynamic_linker
1380 0x10000000, // default_text_segment_address
1381 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1382 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1383 false, // isolate_execinstr
1385 elfcpp::SHN_UNDEF, // small_common_shndx
1386 elfcpp::SHN_UNDEF, // large_common_shndx
1387 0, // small_common_section_flags
1388 0, // large_common_section_flags
1389 NULL, // attributes_section
1390 NULL, // attributes_vendor
1391 "_start" // entry_symbol_name
1395 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1398 false, // is_big_endian
1399 elfcpp::EM_PPC64, // machine_code
1400 false, // has_make_symbol
1401 false, // has_resolve
1402 false, // has_code_fill
1403 true, // is_default_stack_executable
1404 false, // can_icf_inline_merge_sections
1406 "/usr/lib/ld.so.1", // dynamic_linker
1407 0x10000000, // default_text_segment_address
1408 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1409 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1410 false, // isolate_execinstr
1412 elfcpp::SHN_UNDEF, // small_common_shndx
1413 elfcpp::SHN_UNDEF, // large_common_shndx
1414 0, // small_common_section_flags
1415 0, // large_common_section_flags
1416 NULL, // attributes_section
1417 NULL, // attributes_vendor
1418 "_start" // entry_symbol_name
1422 is_branch_reloc(unsigned int r_type)
1424 return (r_type == elfcpp::R_POWERPC_REL24
1425 || r_type == elfcpp::R_PPC_PLTREL24
1426 || r_type == elfcpp::R_PPC_LOCAL24PC
1427 || r_type == elfcpp::R_POWERPC_REL14
1428 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1429 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1430 || r_type == elfcpp::R_POWERPC_ADDR24
1431 || r_type == elfcpp::R_POWERPC_ADDR14
1432 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1433 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1436 // If INSN is an opcode that may be used with an @tls operand, return
1437 // the transformed insn for TLS optimisation, otherwise return 0. If
1438 // REG is non-zero only match an insn with RB or RA equal to REG.
1440 at_tls_transform(uint32_t insn, unsigned int reg)
1442 if ((insn & (0x3f << 26)) != 31 << 26)
1446 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1447 rtra = insn & ((1 << 26) - (1 << 16));
1448 else if (((insn >> 16) & 0x1f) == reg)
1449 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1453 if ((insn & (0x3ff << 1)) == 266 << 1)
1456 else if ((insn & (0x1f << 1)) == 23 << 1
1457 && ((insn & (0x1f << 6)) < 14 << 6
1458 || ((insn & (0x1f << 6)) >= 16 << 6
1459 && (insn & (0x1f << 6)) < 24 << 6)))
1460 // load and store indexed -> dform
1461 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1462 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1463 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1464 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1465 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1467 insn = (58 << 26) | 2;
1475 template<int size, bool big_endian>
1476 class Powerpc_relocate_functions
1496 typedef Powerpc_relocate_functions<size, big_endian> This;
1497 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1499 template<int valsize>
1501 has_overflow_signed(Address value)
1503 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1504 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1505 limit <<= ((valsize - 1) >> 1);
1506 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1507 return value + limit > (limit << 1) - 1;
1510 template<int valsize>
1512 has_overflow_unsigned(Address value)
1514 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1515 limit <<= ((valsize - 1) >> 1);
1516 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1517 return value > (limit << 1) - 1;
1520 template<int valsize>
1522 has_overflow_bitfield(Address value)
1524 return (has_overflow_unsigned<valsize>(value)
1525 && has_overflow_signed<valsize>(value));
1528 template<int valsize>
1529 static inline Status
1530 overflowed(Address value, Overflow_check overflow)
1532 if (overflow == CHECK_SIGNED)
1534 if (has_overflow_signed<valsize>(value))
1535 return STATUS_OVERFLOW;
1537 else if (overflow == CHECK_UNSIGNED)
1539 if (has_overflow_unsigned<valsize>(value))
1540 return STATUS_OVERFLOW;
1542 else if (overflow == CHECK_BITFIELD)
1544 if (has_overflow_bitfield<valsize>(value))
1545 return STATUS_OVERFLOW;
1550 // Do a simple RELA relocation
1551 template<int fieldsize, int valsize>
1552 static inline Status
1553 rela(unsigned char* view, Address value, Overflow_check overflow)
1555 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1556 Valtype* wv = reinterpret_cast<Valtype*>(view);
1557 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value);
1558 return overflowed<valsize>(value, overflow);
1561 template<int fieldsize, int valsize>
1562 static inline Status
1563 rela(unsigned char* view,
1564 unsigned int right_shift,
1565 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1567 Overflow_check overflow)
1569 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1570 Valtype* wv = reinterpret_cast<Valtype*>(view);
1571 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv);
1572 Valtype reloc = value >> right_shift;
1575 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc);
1576 return overflowed<valsize>(value >> right_shift, overflow);
1579 // Do a simple RELA relocation, unaligned.
1580 template<int fieldsize, int valsize>
1581 static inline Status
1582 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1584 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value);
1585 return overflowed<valsize>(value, overflow);
1588 template<int fieldsize, int valsize>
1589 static inline Status
1590 rela_ua(unsigned char* view,
1591 unsigned int right_shift,
1592 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1594 Overflow_check overflow)
1596 typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype
1598 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view);
1599 Valtype reloc = value >> right_shift;
1602 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc);
1603 return overflowed<valsize>(value >> right_shift, overflow);
1607 // R_PPC64_ADDR64: (Symbol + Addend)
1609 addr64(unsigned char* view, Address value)
1610 { This::template rela<64,64>(view, value, CHECK_NONE); }
1612 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1614 addr64_u(unsigned char* view, Address value)
1615 { This::template rela_ua<64,64>(view, value, CHECK_NONE); }
1617 // R_POWERPC_ADDR32: (Symbol + Addend)
1618 static inline Status
1619 addr32(unsigned char* view, Address value, Overflow_check overflow)
1620 { return This::template rela<32,32>(view, value, overflow); }
1622 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1623 static inline Status
1624 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1625 { return This::template rela_ua<32,32>(view, value, overflow); }
1627 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1628 static inline Status
1629 addr24(unsigned char* view, Address value, Overflow_check overflow)
1631 Status stat = This::template rela<32,26>(view, 0, 0x03fffffc,
1633 if (overflow != CHECK_NONE && (value & 3) != 0)
1634 stat = STATUS_OVERFLOW;
1638 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1639 static inline Status
1640 addr16(unsigned char* view, Address value, Overflow_check overflow)
1641 { return This::template rela<16,16>(view, value, overflow); }
1643 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1644 static inline Status
1645 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1646 { return This::template rela_ua<16,16>(view, value, overflow); }
1648 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1649 static inline Status
1650 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1652 Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow);
1653 if (overflow != CHECK_NONE && (value & 3) != 0)
1654 stat = STATUS_OVERFLOW;
1658 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1660 addr16_hi(unsigned char* view, Address value)
1661 { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); }
1663 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1665 addr16_ha(unsigned char* view, Address value)
1666 { This::addr16_hi(view, value + 0x8000); }
1668 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1670 addr16_hi2(unsigned char* view, Address value)
1671 { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); }
1673 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1675 addr16_ha2(unsigned char* view, Address value)
1676 { This::addr16_hi2(view, value + 0x8000); }
1678 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1680 addr16_hi3(unsigned char* view, Address value)
1681 { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); }
1683 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1685 addr16_ha3(unsigned char* view, Address value)
1686 { This::addr16_hi3(view, value + 0x8000); }
1688 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1689 static inline Status
1690 addr14(unsigned char* view, Address value, Overflow_check overflow)
1692 Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow);
1693 if (overflow != CHECK_NONE && (value & 3) != 0)
1694 stat = STATUS_OVERFLOW;
1699 // Set ABI version for input and output.
1701 template<int size, bool big_endian>
1703 Powerpc_relobj<size, big_endian>::set_abiversion(int ver)
1705 this->e_flags_ |= ver;
1706 if (this->abiversion() != 0)
1708 Target_powerpc<size, big_endian>* target =
1709 static_cast<Target_powerpc<size, big_endian>*>(
1710 parameters->sized_target<size, big_endian>());
1711 if (target->abiversion() == 0)
1712 target->set_abiversion(this->abiversion());
1713 else if (target->abiversion() != this->abiversion())
1714 gold_error(_("%s: ABI version %d is not compatible "
1715 "with ABI version %d output"),
1716 this->name().c_str(),
1717 this->abiversion(), target->abiversion());
1722 // Stash away the index of .got2 or .opd in a relocatable object, if
1723 // such a section exists.
1725 template<int size, bool big_endian>
1727 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1728 Read_symbols_data* sd)
1730 const unsigned char* const pshdrs = sd->section_headers->data();
1731 const unsigned char* namesu = sd->section_names->data();
1732 const char* names = reinterpret_cast<const char*>(namesu);
1733 section_size_type names_size = sd->section_names_size;
1734 const unsigned char* s;
1736 s = this->template find_shdr<size, big_endian>(pshdrs,
1737 size == 32 ? ".got2" : ".opd",
1738 names, names_size, NULL);
1741 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1742 this->special_ = ndx;
1745 if (this->abiversion() == 0)
1746 this->set_abiversion(1);
1747 else if (this->abiversion() > 1)
1748 gold_error(_("%s: .opd invalid in abiv%d"),
1749 this->name().c_str(), this->abiversion());
1752 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1755 // Examine .rela.opd to build info about function entry points.
1757 template<int size, bool big_endian>
1759 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1761 const unsigned char* prelocs,
1762 const unsigned char* plocal_syms)
1766 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1768 const int reloc_size
1769 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1770 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1771 Address expected_off = 0;
1772 bool regular = true;
1773 unsigned int opd_ent_size = 0;
1775 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1777 Reltype reloc(prelocs);
1778 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1779 = reloc.get_r_info();
1780 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1781 if (r_type == elfcpp::R_PPC64_ADDR64)
1783 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1784 typename elfcpp::Elf_types<size>::Elf_Addr value;
1787 if (r_sym < this->local_symbol_count())
1789 typename elfcpp::Sym<size, big_endian>
1790 lsym(plocal_syms + r_sym * sym_size);
1791 shndx = lsym.get_st_shndx();
1792 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1793 value = lsym.get_st_value();
1796 shndx = this->symbol_section_and_value(r_sym, &value,
1798 this->set_opd_ent(reloc.get_r_offset(), shndx,
1799 value + reloc.get_r_addend());
1802 expected_off = reloc.get_r_offset();
1803 opd_ent_size = expected_off;
1805 else if (expected_off != reloc.get_r_offset())
1807 expected_off += opd_ent_size;
1809 else if (r_type == elfcpp::R_PPC64_TOC)
1811 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1816 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1817 this->name().c_str(), r_type);
1821 if (reloc_count <= 2)
1822 opd_ent_size = this->section_size(this->opd_shndx());
1823 if (opd_ent_size != 24 && opd_ent_size != 16)
1827 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1828 this->name().c_str());
1834 template<int size, bool big_endian>
1836 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1838 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1841 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1842 p != rd->relocs.end();
1845 if (p->data_shndx == this->opd_shndx())
1847 uint64_t opd_size = this->section_size(this->opd_shndx());
1848 gold_assert(opd_size == static_cast<size_t>(opd_size));
1851 this->init_opd(opd_size);
1852 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1853 rd->local_symbols->data());
1861 // Read the symbols then set up st_other vector.
1863 template<int size, bool big_endian>
1865 Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1867 this->base_read_symbols(sd);
1870 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1871 const unsigned char* const pshdrs = sd->section_headers->data();
1872 const unsigned int loccount = this->do_local_symbol_count();
1875 this->st_other_.resize(loccount);
1876 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1877 off_t locsize = loccount * sym_size;
1878 const unsigned int symtab_shndx = this->symtab_shndx();
1879 const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size;
1880 typename elfcpp::Shdr<size, big_endian> shdr(psymtab);
1881 const unsigned char* psyms = this->get_view(shdr.get_sh_offset(),
1882 locsize, true, false);
1884 for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
1886 elfcpp::Sym<size, big_endian> sym(psyms);
1887 unsigned char st_other = sym.get_st_other();
1888 this->st_other_[i] = st_other;
1889 if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
1891 if (this->abiversion() == 0)
1892 this->set_abiversion(2);
1893 else if (this->abiversion() < 2)
1894 gold_error(_("%s: local symbol %d has invalid st_other"
1895 " for ABI version 1"),
1896 this->name().c_str(), i);
1903 template<int size, bool big_endian>
1905 Powerpc_dynobj<size, big_endian>::set_abiversion(int ver)
1907 this->e_flags_ |= ver;
1908 if (this->abiversion() != 0)
1910 Target_powerpc<size, big_endian>* target =
1911 static_cast<Target_powerpc<size, big_endian>*>(
1912 parameters->sized_target<size, big_endian>());
1913 if (target->abiversion() == 0)
1914 target->set_abiversion(this->abiversion());
1915 else if (target->abiversion() != this->abiversion())
1916 gold_error(_("%s: ABI version %d is not compatible "
1917 "with ABI version %d output"),
1918 this->name().c_str(),
1919 this->abiversion(), target->abiversion());
1924 // Call Sized_dynobj::base_read_symbols to read the symbols then
1925 // read .opd from a dynamic object, filling in opd_ent_ vector,
1927 template<int size, bool big_endian>
1929 Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1931 this->base_read_symbols(sd);
1934 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1935 const unsigned char* const pshdrs = sd->section_headers->data();
1936 const unsigned char* namesu = sd->section_names->data();
1937 const char* names = reinterpret_cast<const char*>(namesu);
1938 const unsigned char* s = NULL;
1939 const unsigned char* opd;
1940 section_size_type opd_size;
1942 // Find and read .opd section.
1945 s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names,
1946 sd->section_names_size,
1951 typename elfcpp::Shdr<size, big_endian> shdr(s);
1952 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
1953 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
1955 if (this->abiversion() == 0)
1956 this->set_abiversion(1);
1957 else if (this->abiversion() > 1)
1958 gold_error(_("%s: .opd invalid in abiv%d"),
1959 this->name().c_str(), this->abiversion());
1961 this->opd_shndx_ = (s - pshdrs) / shdr_size;
1962 this->opd_address_ = shdr.get_sh_addr();
1963 opd_size = convert_to_section_size_type(shdr.get_sh_size());
1964 opd = this->get_view(shdr.get_sh_offset(), opd_size,
1970 // Build set of executable sections.
1971 // Using a set is probably overkill. There is likely to be only
1972 // a few executable sections, typically .init, .text and .fini,
1973 // and they are generally grouped together.
1974 typedef std::set<Sec_info> Exec_sections;
1975 Exec_sections exec_sections;
1977 for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size)
1979 typename elfcpp::Shdr<size, big_endian> shdr(s);
1980 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
1981 && ((shdr.get_sh_flags()
1982 & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
1983 == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
1984 && shdr.get_sh_size() != 0)
1986 exec_sections.insert(Sec_info(shdr.get_sh_addr(),
1987 shdr.get_sh_size(), i));
1990 if (exec_sections.empty())
1993 // Look over the OPD entries. This is complicated by the fact
1994 // that some binaries will use two-word entries while others
1995 // will use the standard three-word entries. In most cases
1996 // the third word (the environment pointer for languages like
1997 // Pascal) is unused and will be zero. If the third word is
1998 // used it should not be pointing into executable sections,
2000 this->init_opd(opd_size);
2001 for (const unsigned char* p = opd; p < opd + opd_size; p += 8)
2003 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype;
2004 const Valtype* valp = reinterpret_cast<const Valtype*>(p);
2005 Valtype val = elfcpp::Swap<64, big_endian>::readval(valp);
2007 // Chances are that this is the third word of an OPD entry.
2009 typename Exec_sections::const_iterator e
2010 = exec_sections.upper_bound(Sec_info(val, 0, 0));
2011 if (e != exec_sections.begin())
2014 if (e->start <= val && val < e->start + e->len)
2016 // We have an address in an executable section.
2017 // VAL ought to be the function entry, set it up.
2018 this->set_opd_ent(p - opd, e->shndx, val);
2019 // Skip second word of OPD entry, the TOC pointer.
2023 // If we didn't match any executable sections, we likely
2024 // have a non-zero third word in the OPD entry.
2029 // Set up some symbols.
2031 template<int size, bool big_endian>
2033 Target_powerpc<size, big_endian>::do_define_standard_symbols(
2034 Symbol_table* symtab,
2039 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2040 // undefined when scanning relocs (and thus requires
2041 // non-relative dynamic relocs). The proper value will be
2043 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2044 if (gotsym != NULL && gotsym->is_undefined())
2046 Target_powerpc<size, big_endian>* target =
2047 static_cast<Target_powerpc<size, big_endian>*>(
2048 parameters->sized_target<size, big_endian>());
2049 Output_data_got_powerpc<size, big_endian>* got
2050 = target->got_section(symtab, layout);
2051 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2052 Symbol_table::PREDEFINED,
2056 elfcpp::STV_HIDDEN, 0,
2060 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2061 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
2062 if (sdasym != NULL && sdasym->is_undefined())
2064 Output_data_space* sdata = new Output_data_space(4, "** sdata");
2066 = layout->add_output_section_data(".sdata", 0,
2068 | elfcpp::SHF_WRITE,
2069 sdata, ORDER_SMALL_DATA, false);
2070 symtab->define_in_output_data("_SDA_BASE_", NULL,
2071 Symbol_table::PREDEFINED,
2072 os, 32768, 0, elfcpp::STT_OBJECT,
2073 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
2079 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2080 Symbol *gotsym = symtab->lookup(".TOC.", NULL);
2081 if (gotsym != NULL && gotsym->is_undefined())
2083 Target_powerpc<size, big_endian>* target =
2084 static_cast<Target_powerpc<size, big_endian>*>(
2085 parameters->sized_target<size, big_endian>());
2086 Output_data_got_powerpc<size, big_endian>* got
2087 = target->got_section(symtab, layout);
2088 symtab->define_in_output_data(".TOC.", NULL,
2089 Symbol_table::PREDEFINED,
2093 elfcpp::STV_HIDDEN, 0,
2099 // Set up PowerPC target specific relobj.
2101 template<int size, bool big_endian>
2103 Target_powerpc<size, big_endian>::do_make_elf_object(
2104 const std::string& name,
2105 Input_file* input_file,
2106 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
2108 int et = ehdr.get_e_type();
2109 // ET_EXEC files are valid input for --just-symbols/-R,
2110 // and we treat them as relocatable objects.
2111 if (et == elfcpp::ET_REL
2112 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
2114 Powerpc_relobj<size, big_endian>* obj =
2115 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
2119 else if (et == elfcpp::ET_DYN)
2121 Powerpc_dynobj<size, big_endian>* obj =
2122 new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr);
2128 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
2133 template<int size, bool big_endian>
2134 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
2137 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
2138 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
2140 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
2141 : Output_data_got<size, big_endian>(),
2142 symtab_(symtab), layout_(layout),
2143 header_ent_cnt_(size == 32 ? 3 : 1),
2144 header_index_(size == 32 ? 0x2000 : 0)
2147 // Override all the Output_data_got methods we use so as to first call
2150 add_global(Symbol* gsym, unsigned int got_type)
2152 this->reserve_ent();
2153 return Output_data_got<size, big_endian>::add_global(gsym, got_type);
2157 add_global_plt(Symbol* gsym, unsigned int got_type)
2159 this->reserve_ent();
2160 return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type);
2164 add_global_tls(Symbol* gsym, unsigned int got_type)
2165 { return this->add_global_plt(gsym, got_type); }
2168 add_global_with_rel(Symbol* gsym, unsigned int got_type,
2169 Output_data_reloc_generic* rel_dyn, unsigned int r_type)
2171 this->reserve_ent();
2172 Output_data_got<size, big_endian>::
2173 add_global_with_rel(gsym, got_type, rel_dyn, r_type);
2177 add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
2178 Output_data_reloc_generic* rel_dyn,
2179 unsigned int r_type_1, unsigned int r_type_2)
2181 this->reserve_ent(2);
2182 Output_data_got<size, big_endian>::
2183 add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2);
2187 add_local(Relobj* object, unsigned int sym_index, unsigned int got_type)
2189 this->reserve_ent();
2190 return Output_data_got<size, big_endian>::add_local(object, sym_index,
2195 add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type)
2197 this->reserve_ent();
2198 return Output_data_got<size, big_endian>::add_local_plt(object, sym_index,
2203 add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type)
2204 { return this->add_local_plt(object, sym_index, got_type); }
2207 add_local_tls_pair(Relobj* object, unsigned int sym_index,
2208 unsigned int got_type,
2209 Output_data_reloc_generic* rel_dyn,
2210 unsigned int r_type)
2212 this->reserve_ent(2);
2213 Output_data_got<size, big_endian>::
2214 add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type);
2218 add_constant(Valtype constant)
2220 this->reserve_ent();
2221 return Output_data_got<size, big_endian>::add_constant(constant);
2225 add_constant_pair(Valtype c1, Valtype c2)
2227 this->reserve_ent(2);
2228 return Output_data_got<size, big_endian>::add_constant_pair(c1, c2);
2231 // Offset of _GLOBAL_OFFSET_TABLE_.
2235 return this->got_offset(this->header_index_);
2238 // Offset of base used to access the GOT/TOC.
2239 // The got/toc pointer reg will be set to this value.
2241 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
2244 return this->g_o_t();
2246 return (this->output_section()->address()
2247 + object->toc_base_offset()
2251 // Ensure our GOT has a header.
2253 set_final_data_size()
2255 if (this->header_ent_cnt_ != 0)
2256 this->make_header();
2257 Output_data_got<size, big_endian>::set_final_data_size();
2260 // First word of GOT header needs some values that are not
2261 // handled by Output_data_got so poke them in here.
2262 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2264 do_write(Output_file* of)
2267 if (size == 32 && this->layout_->dynamic_data() != NULL)
2268 val = this->layout_->dynamic_section()->address();
2270 val = this->output_section()->address() + 0x8000;
2271 this->replace_constant(this->header_index_, val);
2272 Output_data_got<size, big_endian>::do_write(of);
2277 reserve_ent(unsigned int cnt = 1)
2279 if (this->header_ent_cnt_ == 0)
2281 if (this->num_entries() + cnt > this->header_index_)
2282 this->make_header();
2288 this->header_ent_cnt_ = 0;
2289 this->header_index_ = this->num_entries();
2292 Output_data_got<size, big_endian>::add_constant(0);
2293 Output_data_got<size, big_endian>::add_constant(0);
2294 Output_data_got<size, big_endian>::add_constant(0);
2296 // Define _GLOBAL_OFFSET_TABLE_ at the header
2297 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2300 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
2301 sym->set_value(this->g_o_t());
2304 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2305 Symbol_table::PREDEFINED,
2306 this, this->g_o_t(), 0,
2309 elfcpp::STV_HIDDEN, 0,
2313 Output_data_got<size, big_endian>::add_constant(0);
2316 // Stashed pointers.
2317 Symbol_table* symtab_;
2321 unsigned int header_ent_cnt_;
2322 // GOT header index.
2323 unsigned int header_index_;
2326 // Get the GOT section, creating it if necessary.
2328 template<int size, bool big_endian>
2329 Output_data_got_powerpc<size, big_endian>*
2330 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
2333 if (this->got_ == NULL)
2335 gold_assert(symtab != NULL && layout != NULL);
2338 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
2340 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
2341 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2342 this->got_, ORDER_DATA, false);
2348 // Get the dynamic reloc section, creating it if necessary.
2350 template<int size, bool big_endian>
2351 typename Target_powerpc<size, big_endian>::Reloc_section*
2352 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
2354 if (this->rela_dyn_ == NULL)
2356 gold_assert(layout != NULL);
2357 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
2358 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
2359 elfcpp::SHF_ALLOC, this->rela_dyn_,
2360 ORDER_DYNAMIC_RELOCS, false);
2362 return this->rela_dyn_;
2365 // Similarly, but for ifunc symbols get the one for ifunc.
2367 template<int size, bool big_endian>
2368 typename Target_powerpc<size, big_endian>::Reloc_section*
2369 Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
2374 return this->rela_dyn_section(layout);
2376 if (this->iplt_ == NULL)
2377 this->make_iplt_section(symtab, layout);
2378 return this->iplt_->rel_plt();
2384 // Determine the stub group size. The group size is the absolute
2385 // value of the parameter --stub-group-size. If --stub-group-size
2386 // is passed a negative value, we restrict stubs to be always before
2387 // the stubbed branches.
2388 Stub_control(int32_t size, bool no_size_errors)
2389 : state_(NO_GROUP), stub_group_size_(abs(size)),
2390 stub14_group_size_(abs(size) >> 10),
2391 stubs_always_before_branch_(size < 0),
2392 suppress_size_errors_(no_size_errors),
2393 group_end_addr_(0), owner_(NULL), output_section_(NULL)
2397 // Return true iff input section can be handled by current stub
2400 can_add_to_stub_group(Output_section* o,
2401 const Output_section::Input_section* i,
2404 const Output_section::Input_section*
2410 { return output_section_; }
2413 set_output_and_owner(Output_section* o,
2414 const Output_section::Input_section* i)
2416 this->output_section_ = o;
2424 FINDING_STUB_SECTION,
2429 uint32_t stub_group_size_;
2430 uint32_t stub14_group_size_;
2431 bool stubs_always_before_branch_;
2432 bool suppress_size_errors_;
2433 uint64_t group_end_addr_;
2434 const Output_section::Input_section* owner_;
2435 Output_section* output_section_;
2438 // Return true iff input section can be handled by current stub
2442 Stub_control::can_add_to_stub_group(Output_section* o,
2443 const Output_section::Input_section* i,
2447 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
2448 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
2450 uint64_t start_addr = o->address();
2453 // .init and .fini sections are pasted together to form a single
2454 // function. We can't be adding stubs in the middle of the function.
2455 this_size = o->data_size();
2458 start_addr += i->relobj()->output_section_offset(i->shndx());
2459 this_size = i->data_size();
2461 uint64_t end_addr = start_addr + this_size;
2462 bool toobig = this_size > group_size;
2464 if (toobig && !this->suppress_size_errors_)
2465 gold_warning(_("%s:%s exceeds group size"),
2466 i->relobj()->name().c_str(),
2467 i->relobj()->section_name(i->shndx()).c_str());
2469 if (this->state_ != HAS_STUB_SECTION
2470 && (!whole_sec || this->output_section_ != o)
2471 && (this->state_ == NO_GROUP
2472 || this->group_end_addr_ - end_addr < group_size))
2475 this->output_section_ = o;
2478 if (this->state_ == NO_GROUP)
2480 this->state_ = FINDING_STUB_SECTION;
2481 this->group_end_addr_ = end_addr;
2483 else if (this->group_end_addr_ - start_addr < group_size)
2485 // Adding this section would make the group larger than GROUP_SIZE.
2486 else if (this->state_ == FINDING_STUB_SECTION
2487 && !this->stubs_always_before_branch_
2490 // But wait, there's more! Input sections up to GROUP_SIZE
2491 // bytes before the stub table can be handled by it too.
2492 this->state_ = HAS_STUB_SECTION;
2493 this->group_end_addr_ = end_addr;
2497 this->state_ = NO_GROUP;
2503 // Look over all the input sections, deciding where to place stubs.
2505 template<int size, bool big_endian>
2507 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
2509 bool no_size_errors)
2511 Stub_control stub_control(this->stub_group_size_, no_size_errors);
2513 // Group input sections and insert stub table
2514 Stub_table_owner* table_owner = NULL;
2515 std::vector<Stub_table_owner*> tables;
2516 Layout::Section_list section_list;
2517 layout->get_executable_sections(§ion_list);
2518 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
2519 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
2520 o != section_list.rend();
2523 typedef Output_section::Input_section_list Input_section_list;
2524 for (Input_section_list::const_reverse_iterator i
2525 = (*o)->input_sections().rbegin();
2526 i != (*o)->input_sections().rend();
2529 if (i->is_input_section()
2530 || i->is_relaxed_input_section())
2532 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2533 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2534 bool has14 = ppcobj->has_14bit_branch(i->shndx());
2535 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
2537 table_owner->output_section = stub_control.output_section();
2538 table_owner->owner = stub_control.owner();
2539 stub_control.set_output_and_owner(*o, &*i);
2542 if (table_owner == NULL)
2544 table_owner = new Stub_table_owner;
2545 tables.push_back(table_owner);
2547 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2551 if (table_owner != NULL)
2553 const Output_section::Input_section* i = stub_control.owner();
2555 if (tables.size() >= 2 && tables[tables.size() - 2]->owner == i)
2557 // Corner case. A new stub group was made for the first
2558 // section (last one looked at here) for some reason, but
2559 // the first section is already being used as the owner for
2560 // a stub table for following sections. Force it into that
2564 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2565 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2566 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2570 table_owner->output_section = stub_control.output_section();
2571 table_owner->owner = i;
2574 for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin();
2578 Stub_table<size, big_endian>* stub_table;
2580 if ((*t)->owner->is_input_section())
2581 stub_table = new Stub_table<size, big_endian>(this,
2582 (*t)->output_section,
2584 else if ((*t)->owner->is_relaxed_input_section())
2585 stub_table = static_cast<Stub_table<size, big_endian>*>(
2586 (*t)->owner->relaxed_input_section());
2589 this->stub_tables_.push_back(stub_table);
2594 static unsigned long
2595 max_branch_delta (unsigned int r_type)
2597 if (r_type == elfcpp::R_POWERPC_REL14
2598 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
2599 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2601 if (r_type == elfcpp::R_POWERPC_REL24
2602 || r_type == elfcpp::R_PPC_PLTREL24
2603 || r_type == elfcpp::R_PPC_LOCAL24PC)
2608 // If this branch needs a plt call stub, or a long branch stub, make one.
2610 template<int size, bool big_endian>
2612 Target_powerpc<size, big_endian>::Branch_info::make_stub(
2613 Stub_table<size, big_endian>* stub_table,
2614 Stub_table<size, big_endian>* ifunc_stub_table,
2615 Symbol_table* symtab) const
2617 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2618 if (sym != NULL && sym->is_forwarder())
2619 sym = symtab->resolve_forwards(sym);
2620 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2621 Target_powerpc<size, big_endian>* target =
2622 static_cast<Target_powerpc<size, big_endian>*>(
2623 parameters->sized_target<size, big_endian>());
2625 ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
2626 : this->object_->local_has_plt_offset(this->r_sym_))
2630 && target->abiversion() >= 2
2631 && !parameters->options().output_is_position_independent()
2632 && !is_branch_reloc(this->r_type_))
2633 target->glink_section()->add_global_entry(gsym);
2636 if (stub_table == NULL)
2637 stub_table = this->object_->stub_table(this->shndx_);
2638 if (stub_table == NULL)
2640 // This is a ref from a data section to an ifunc symbol.
2641 stub_table = ifunc_stub_table;
2643 gold_assert(stub_table != NULL);
2644 Address from = this->object_->get_output_section_offset(this->shndx_);
2645 if (from != invalid_address)
2646 from += (this->object_->output_section(this->shndx_)->address()
2649 return stub_table->add_plt_call_entry(from,
2650 this->object_, gsym,
2651 this->r_type_, this->addend_);
2653 return stub_table->add_plt_call_entry(from,
2654 this->object_, this->r_sym_,
2655 this->r_type_, this->addend_);
2660 unsigned long max_branch_offset = max_branch_delta(this->r_type_);
2661 if (max_branch_offset == 0)
2663 Address from = this->object_->get_output_section_offset(this->shndx_);
2664 gold_assert(from != invalid_address);
2665 from += (this->object_->output_section(this->shndx_)->address()
2670 switch (gsym->source())
2672 case Symbol::FROM_OBJECT:
2674 Object* symobj = gsym->object();
2675 if (symobj->is_dynamic()
2676 || symobj->pluginobj() != NULL)
2679 unsigned int shndx = gsym->shndx(&is_ordinary);
2680 if (shndx == elfcpp::SHN_UNDEF)
2685 case Symbol::IS_UNDEFINED:
2691 Symbol_table::Compute_final_value_status status;
2692 to = symtab->compute_final_value<size>(gsym, &status);
2693 if (status != Symbol_table::CFVS_OK)
2696 to += this->object_->ppc64_local_entry_offset(gsym);
2700 const Symbol_value<size>* psymval
2701 = this->object_->local_symbol(this->r_sym_);
2702 Symbol_value<size> symval;
2703 typedef Sized_relobj_file<size, big_endian> ObjType;
2704 typename ObjType::Compute_final_local_value_status status
2705 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2707 if (status != ObjType::CFLV_OK
2708 || !symval.has_output_value())
2710 to = symval.value(this->object_, 0);
2712 to += this->object_->ppc64_local_entry_offset(this->r_sym_);
2714 to += this->addend_;
2715 if (stub_table == NULL)
2716 stub_table = this->object_->stub_table(this->shndx_);
2717 if (size == 64 && target->abiversion() < 2)
2719 unsigned int dest_shndx;
2720 if (!target->symval_for_branch(symtab, gsym, this->object_,
2724 Address delta = to - from;
2725 if (delta + max_branch_offset >= 2 * max_branch_offset)
2727 if (stub_table == NULL)
2729 gold_warning(_("%s:%s: branch in non-executable section,"
2730 " no long branch stub for you"),
2731 this->object_->name().c_str(),
2732 this->object_->section_name(this->shndx_).c_str());
2735 return stub_table->add_long_branch_entry(this->object_,
2736 this->r_type_, from, to);
2742 // Relaxation hook. This is where we do stub generation.
2744 template<int size, bool big_endian>
2746 Target_powerpc<size, big_endian>::do_relax(int pass,
2747 const Input_objects*,
2748 Symbol_table* symtab,
2752 unsigned int prev_brlt_size = 0;
2756 = this->abiversion() < 2 && parameters->options().plt_thread_safe();
2758 && this->abiversion() < 2
2760 && !parameters->options().user_set_plt_thread_safe())
2762 static const char* const thread_starter[] =
2766 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2768 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2769 "mq_notify", "create_timer",
2774 "GOMP_parallel_start",
2775 "GOMP_parallel_loop_static",
2776 "GOMP_parallel_loop_static_start",
2777 "GOMP_parallel_loop_dynamic",
2778 "GOMP_parallel_loop_dynamic_start",
2779 "GOMP_parallel_loop_guided",
2780 "GOMP_parallel_loop_guided_start",
2781 "GOMP_parallel_loop_runtime",
2782 "GOMP_parallel_loop_runtime_start",
2783 "GOMP_parallel_sections",
2784 "GOMP_parallel_sections_start",
2789 if (parameters->options().shared())
2793 for (unsigned int i = 0;
2794 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2797 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2798 thread_safe = (sym != NULL
2800 && sym->in_real_elf());
2806 this->plt_thread_safe_ = thread_safe;
2811 this->stub_group_size_ = parameters->options().stub_group_size();
2812 bool no_size_errors = true;
2813 if (this->stub_group_size_ == 1)
2814 this->stub_group_size_ = 0x1c00000;
2815 else if (this->stub_group_size_ == -1)
2816 this->stub_group_size_ = -0x1e00000;
2818 no_size_errors = false;
2819 this->group_sections(layout, task, no_size_errors);
2821 else if (this->relax_failed_ && this->relax_fail_count_ < 3)
2823 this->branch_lookup_table_.clear();
2824 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2825 p != this->stub_tables_.end();
2828 (*p)->clear_stubs(true);
2830 this->stub_tables_.clear();
2831 this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
2832 gold_info(_("%s: stub group size is too large; retrying with %d"),
2833 program_name, this->stub_group_size_);
2834 this->group_sections(layout, task, true);
2837 // We need address of stub tables valid for make_stub.
2838 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2839 p != this->stub_tables_.end();
2842 const Powerpc_relobj<size, big_endian>* object
2843 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2844 Address off = object->get_output_section_offset((*p)->shndx());
2845 gold_assert(off != invalid_address);
2846 Output_section* os = (*p)->output_section();
2847 (*p)->set_address_and_size(os, off);
2852 // Clear plt call stubs, long branch stubs and branch lookup table.
2853 prev_brlt_size = this->branch_lookup_table_.size();
2854 this->branch_lookup_table_.clear();
2855 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2856 p != this->stub_tables_.end();
2859 (*p)->clear_stubs(false);
2863 // Build all the stubs.
2864 this->relax_failed_ = false;
2865 Stub_table<size, big_endian>* ifunc_stub_table
2866 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2867 Stub_table<size, big_endian>* one_stub_table
2868 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2869 for (typename Branches::const_iterator b = this->branch_info_.begin();
2870 b != this->branch_info_.end();
2873 if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
2874 && !this->relax_failed_)
2876 this->relax_failed_ = true;
2877 this->relax_fail_count_++;
2878 if (this->relax_fail_count_ < 3)
2883 // Did anything change size?
2884 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2885 bool again = num_huge_branches != prev_brlt_size;
2886 if (size == 64 && num_huge_branches != 0)
2887 this->make_brlt_section(layout);
2888 if (size == 64 && again)
2889 this->brlt_section_->set_current_size(num_huge_branches);
2891 typedef Unordered_set<Output_section*> Output_sections;
2892 Output_sections os_need_update;
2893 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2894 p != this->stub_tables_.end();
2897 if ((*p)->size_update())
2900 (*p)->add_eh_frame(layout);
2901 os_need_update.insert((*p)->output_section());
2905 // Set output section offsets for all input sections in an output
2906 // section that just changed size. Anything past the stubs will
2908 for (typename Output_sections::iterator p = os_need_update.begin();
2909 p != os_need_update.end();
2912 Output_section* os = *p;
2914 typedef Output_section::Input_section_list Input_section_list;
2915 for (Input_section_list::const_iterator i = os->input_sections().begin();
2916 i != os->input_sections().end();
2919 off = align_address(off, i->addralign());
2920 if (i->is_input_section() || i->is_relaxed_input_section())
2921 i->relobj()->set_section_offset(i->shndx(), off);
2922 if (i->is_relaxed_input_section())
2924 Stub_table<size, big_endian>* stub_table
2925 = static_cast<Stub_table<size, big_endian>*>(
2926 i->relaxed_input_section());
2927 off += stub_table->set_address_and_size(os, off);
2930 off += i->data_size();
2932 // If .branch_lt is part of this output section, then we have
2933 // just done the offset adjustment.
2934 os->clear_section_offsets_need_adjustment();
2939 && num_huge_branches != 0
2940 && parameters->options().output_is_position_independent())
2942 // Fill in the BRLT relocs.
2943 this->brlt_section_->reset_brlt_sizes();
2944 for (typename Branch_lookup_table::const_iterator p
2945 = this->branch_lookup_table_.begin();
2946 p != this->branch_lookup_table_.end();
2949 this->brlt_section_->add_reloc(p->first, p->second);
2951 this->brlt_section_->finalize_brlt_sizes();
2956 template<int size, bool big_endian>
2958 Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
2959 unsigned char* oview,
2963 uint64_t address = plt->address();
2964 off_t len = plt->data_size();
2966 if (plt == this->glink_)
2968 // See Output_data_glink::do_write() for glink contents.
2971 gold_assert(parameters->doing_static_link());
2972 // Static linking may need stubs, to support ifunc and long
2973 // branches. We need to create an output section for
2974 // .eh_frame early in the link process, to have a place to
2975 // attach stub .eh_frame info. We also need to have
2976 // registered a CIE that matches the stub CIE. Both of
2977 // these requirements are satisfied by creating an FDE and
2978 // CIE for .glink, even though static linking will leave
2979 // .glink zero length.
2980 // ??? Hopefully generating an FDE with a zero address range
2981 // won't confuse anything that consumes .eh_frame info.
2983 else if (size == 64)
2985 // There is one word before __glink_PLTresolve
2989 else if (parameters->options().output_is_position_independent())
2991 // There are two FDEs for a position independent glink.
2992 // The first covers the branch table, the second
2993 // __glink_PLTresolve at the end of glink.
2994 off_t resolve_size = this->glink_->pltresolve_size;
2995 if (oview[9] == elfcpp::DW_CFA_nop)
2996 len -= resolve_size;
2999 address += len - resolve_size;
3006 // Must be a stub table.
3007 const Stub_table<size, big_endian>* stub_table
3008 = static_cast<const Stub_table<size, big_endian>*>(plt);
3009 uint64_t stub_address = stub_table->stub_address();
3010 len -= stub_address - address;
3011 address = stub_address;
3014 *paddress = address;
3018 // A class to handle the PLT data.
3020 template<int size, bool big_endian>
3021 class Output_data_plt_powerpc : public Output_section_data_build
3024 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3025 size, big_endian> Reloc_section;
3027 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
3028 Reloc_section* plt_rel,
3030 : Output_section_data_build(size == 32 ? 4 : 8),
3036 // Add an entry to the PLT.
3041 add_ifunc_entry(Symbol*);
3044 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
3046 // Return the .rela.plt section data.
3053 // Return the number of PLT entries.
3057 if (this->current_data_size() == 0)
3059 return ((this->current_data_size() - this->first_plt_entry_offset())
3060 / this->plt_entry_size());
3065 do_adjust_output_section(Output_section* os)
3070 // Write to a map file.
3072 do_print_to_mapfile(Mapfile* mapfile) const
3073 { mapfile->print_output_data(this, this->name_); }
3076 // Return the offset of the first non-reserved PLT entry.
3078 first_plt_entry_offset() const
3080 // IPLT has no reserved entry.
3081 if (this->name_[3] == 'I')
3083 return this->targ_->first_plt_entry_offset();
3086 // Return the size of each PLT entry.
3088 plt_entry_size() const
3090 return this->targ_->plt_entry_size();
3093 // Write out the PLT data.
3095 do_write(Output_file*);
3097 // The reloc section.
3098 Reloc_section* rel_;
3099 // Allows access to .glink for do_write.
3100 Target_powerpc<size, big_endian>* targ_;
3101 // What to report in map file.
3105 // Add an entry to the PLT.
3107 template<int size, bool big_endian>
3109 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
3111 if (!gsym->has_plt_offset())
3113 section_size_type off = this->current_data_size();
3115 off += this->first_plt_entry_offset();
3116 gsym->set_plt_offset(off);
3117 gsym->set_needs_dynsym_entry();
3118 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
3119 this->rel_->add_global(gsym, dynrel, this, off, 0);
3120 off += this->plt_entry_size();
3121 this->set_current_data_size(off);
3125 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3127 template<int size, bool big_endian>
3129 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
3131 if (!gsym->has_plt_offset())
3133 section_size_type off = this->current_data_size();
3134 gsym->set_plt_offset(off);
3135 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3136 if (size == 64 && this->targ_->abiversion() < 2)
3137 dynrel = elfcpp::R_PPC64_JMP_IREL;
3138 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
3139 off += this->plt_entry_size();
3140 this->set_current_data_size(off);
3144 // Add an entry for a local ifunc symbol to the IPLT.
3146 template<int size, bool big_endian>
3148 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
3149 Sized_relobj_file<size, big_endian>* relobj,
3150 unsigned int local_sym_index)
3152 if (!relobj->local_has_plt_offset(local_sym_index))
3154 section_size_type off = this->current_data_size();
3155 relobj->set_local_plt_offset(local_sym_index, off);
3156 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3157 if (size == 64 && this->targ_->abiversion() < 2)
3158 dynrel = elfcpp::R_PPC64_JMP_IREL;
3159 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
3161 off += this->plt_entry_size();
3162 this->set_current_data_size(off);
3166 static const uint32_t add_0_11_11 = 0x7c0b5a14;
3167 static const uint32_t add_2_2_11 = 0x7c425a14;
3168 static const uint32_t add_3_3_2 = 0x7c631214;
3169 static const uint32_t add_3_3_13 = 0x7c636a14;
3170 static const uint32_t add_11_0_11 = 0x7d605a14;
3171 static const uint32_t add_11_2_11 = 0x7d625a14;
3172 static const uint32_t add_11_11_2 = 0x7d6b1214;
3173 static const uint32_t addi_0_12 = 0x380c0000;
3174 static const uint32_t addi_2_2 = 0x38420000;
3175 static const uint32_t addi_3_3 = 0x38630000;
3176 static const uint32_t addi_11_11 = 0x396b0000;
3177 static const uint32_t addi_12_12 = 0x398c0000;
3178 static const uint32_t addis_0_2 = 0x3c020000;
3179 static const uint32_t addis_0_13 = 0x3c0d0000;
3180 static const uint32_t addis_3_2 = 0x3c620000;
3181 static const uint32_t addis_3_13 = 0x3c6d0000;
3182 static const uint32_t addis_11_2 = 0x3d620000;
3183 static const uint32_t addis_11_11 = 0x3d6b0000;
3184 static const uint32_t addis_11_30 = 0x3d7e0000;
3185 static const uint32_t addis_12_2 = 0x3d820000;
3186 static const uint32_t addis_12_12 = 0x3d8c0000;
3187 static const uint32_t b = 0x48000000;
3188 static const uint32_t bcl_20_31 = 0x429f0005;
3189 static const uint32_t bctr = 0x4e800420;
3190 static const uint32_t blr = 0x4e800020;
3191 static const uint32_t bnectr_p4 = 0x4ce20420;
3192 static const uint32_t cmpldi_2_0 = 0x28220000;
3193 static const uint32_t cror_15_15_15 = 0x4def7b82;
3194 static const uint32_t cror_31_31_31 = 0x4ffffb82;
3195 static const uint32_t ld_0_1 = 0xe8010000;
3196 static const uint32_t ld_0_12 = 0xe80c0000;
3197 static const uint32_t ld_2_1 = 0xe8410000;
3198 static const uint32_t ld_2_2 = 0xe8420000;
3199 static const uint32_t ld_2_11 = 0xe84b0000;
3200 static const uint32_t ld_11_2 = 0xe9620000;
3201 static const uint32_t ld_11_11 = 0xe96b0000;
3202 static const uint32_t ld_12_2 = 0xe9820000;
3203 static const uint32_t ld_12_11 = 0xe98b0000;
3204 static const uint32_t ld_12_12 = 0xe98c0000;
3205 static const uint32_t lfd_0_1 = 0xc8010000;
3206 static const uint32_t li_0_0 = 0x38000000;
3207 static const uint32_t li_12_0 = 0x39800000;
3208 static const uint32_t lis_0_0 = 0x3c000000;
3209 static const uint32_t lis_11 = 0x3d600000;
3210 static const uint32_t lis_12 = 0x3d800000;
3211 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
3212 static const uint32_t lwz_0_12 = 0x800c0000;
3213 static const uint32_t lwz_11_11 = 0x816b0000;
3214 static const uint32_t lwz_11_30 = 0x817e0000;
3215 static const uint32_t lwz_12_12 = 0x818c0000;
3216 static const uint32_t lwzu_0_12 = 0x840c0000;
3217 static const uint32_t mflr_0 = 0x7c0802a6;
3218 static const uint32_t mflr_11 = 0x7d6802a6;
3219 static const uint32_t mflr_12 = 0x7d8802a6;
3220 static const uint32_t mtctr_0 = 0x7c0903a6;
3221 static const uint32_t mtctr_11 = 0x7d6903a6;
3222 static const uint32_t mtctr_12 = 0x7d8903a6;
3223 static const uint32_t mtlr_0 = 0x7c0803a6;
3224 static const uint32_t mtlr_12 = 0x7d8803a6;
3225 static const uint32_t nop = 0x60000000;
3226 static const uint32_t ori_0_0_0 = 0x60000000;
3227 static const uint32_t srdi_0_0_2 = 0x7800f082;
3228 static const uint32_t std_0_1 = 0xf8010000;
3229 static const uint32_t std_0_12 = 0xf80c0000;
3230 static const uint32_t std_2_1 = 0xf8410000;
3231 static const uint32_t stfd_0_1 = 0xd8010000;
3232 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
3233 static const uint32_t sub_11_11_12 = 0x7d6c5850;
3234 static const uint32_t sub_12_12_11 = 0x7d8b6050;
3235 static const uint32_t xor_2_12_12 = 0x7d826278;
3236 static const uint32_t xor_11_12_12 = 0x7d8b6278;
3238 // Write out the PLT.
3240 template<int size, bool big_endian>
3242 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
3244 if (size == 32 && this->name_[3] != 'I')
3246 const section_size_type offset = this->offset();
3247 const section_size_type oview_size
3248 = convert_to_section_size_type(this->data_size());
3249 unsigned char* const oview = of->get_output_view(offset, oview_size);
3250 unsigned char* pov = oview;
3251 unsigned char* endpov = oview + oview_size;
3253 // The address of the .glink branch table
3254 const Output_data_glink<size, big_endian>* glink
3255 = this->targ_->glink_section();
3256 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
3258 while (pov < endpov)
3260 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
3265 of->write_output_view(offset, oview_size, oview);
3269 // Create the PLT section.
3271 template<int size, bool big_endian>
3273 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
3276 if (this->plt_ == NULL)
3278 if (this->got_ == NULL)
3279 this->got_section(symtab, layout);
3281 if (this->glink_ == NULL)
3282 make_glink_section(layout);
3284 // Ensure that .rela.dyn always appears before .rela.plt This is
3285 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3286 // needs to include .rela.plt in its range.
3287 this->rela_dyn_section(layout);
3289 Reloc_section* plt_rel = new Reloc_section(false);
3290 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
3291 elfcpp::SHF_ALLOC, plt_rel,
3292 ORDER_DYNAMIC_PLT_RELOCS, false);
3294 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
3296 layout->add_output_section_data(".plt",
3298 ? elfcpp::SHT_PROGBITS
3299 : elfcpp::SHT_NOBITS),
3300 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3309 // Create the IPLT section.
3311 template<int size, bool big_endian>
3313 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
3316 if (this->iplt_ == NULL)
3318 this->make_plt_section(symtab, layout);
3320 Reloc_section* iplt_rel = new Reloc_section(false);
3321 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
3323 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
3325 this->plt_->output_section()->add_output_section_data(this->iplt_);
3329 // A section for huge long branch addresses, similar to plt section.
3331 template<int size, bool big_endian>
3332 class Output_data_brlt_powerpc : public Output_section_data_build
3335 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3336 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3337 size, big_endian> Reloc_section;
3339 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
3340 Reloc_section* brlt_rel)
3341 : Output_section_data_build(size == 32 ? 4 : 8),
3349 this->reset_data_size();
3350 this->rel_->reset_data_size();
3354 finalize_brlt_sizes()
3356 this->finalize_data_size();
3357 this->rel_->finalize_data_size();
3360 // Add a reloc for an entry in the BRLT.
3362 add_reloc(Address to, unsigned int off)
3363 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
3365 // Update section and reloc section size.
3367 set_current_size(unsigned int num_branches)
3369 this->reset_address_and_file_offset();
3370 this->set_current_data_size(num_branches * 16);
3371 this->finalize_data_size();
3372 Output_section* os = this->output_section();
3373 os->set_section_offsets_need_adjustment();
3374 if (this->rel_ != NULL)
3376 unsigned int reloc_size
3377 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
3378 this->rel_->reset_address_and_file_offset();
3379 this->rel_->set_current_data_size(num_branches * reloc_size);
3380 this->rel_->finalize_data_size();
3381 Output_section* os = this->rel_->output_section();
3382 os->set_section_offsets_need_adjustment();
3388 do_adjust_output_section(Output_section* os)
3393 // Write to a map file.
3395 do_print_to_mapfile(Mapfile* mapfile) const
3396 { mapfile->print_output_data(this, "** BRLT"); }
3399 // Write out the BRLT data.
3401 do_write(Output_file*);
3403 // The reloc section.
3404 Reloc_section* rel_;
3405 Target_powerpc<size, big_endian>* targ_;
3408 // Make the branch lookup table section.
3410 template<int size, bool big_endian>
3412 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
3414 if (size == 64 && this->brlt_section_ == NULL)
3416 Reloc_section* brlt_rel = NULL;
3417 bool is_pic = parameters->options().output_is_position_independent();
3420 // When PIC we can't fill in .branch_lt (like .plt it can be
3421 // a bss style section) but must initialise at runtime via
3422 // dynamic relocats.
3423 this->rela_dyn_section(layout);
3424 brlt_rel = new Reloc_section(false);
3425 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
3428 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
3429 if (this->plt_ && is_pic)
3430 this->plt_->output_section()
3431 ->add_output_section_data(this->brlt_section_);
3433 layout->add_output_section_data(".branch_lt",
3434 (is_pic ? elfcpp::SHT_NOBITS
3435 : elfcpp::SHT_PROGBITS),
3436 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3437 this->brlt_section_,
3438 (is_pic ? ORDER_SMALL_BSS
3439 : ORDER_SMALL_DATA),
3444 // Write out .branch_lt when non-PIC.
3446 template<int size, bool big_endian>
3448 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
3450 if (size == 64 && !parameters->options().output_is_position_independent())
3452 const section_size_type offset = this->offset();
3453 const section_size_type oview_size
3454 = convert_to_section_size_type(this->data_size());
3455 unsigned char* const oview = of->get_output_view(offset, oview_size);
3457 this->targ_->write_branch_lookup_table(oview);
3458 of->write_output_view(offset, oview_size, oview);
3462 static inline uint32_t
3468 static inline uint32_t
3474 static inline uint32_t
3477 return hi(a + 0x8000);
3483 static const unsigned char eh_frame_cie[12];
3487 const unsigned char Eh_cie<size>::eh_frame_cie[] =
3490 'z', 'R', 0, // Augmentation string.
3491 4, // Code alignment.
3492 0x80 - size / 8 , // Data alignment.
3494 1, // Augmentation size.
3495 (elfcpp::DW_EH_PE_pcrel
3496 | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
3497 elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
3500 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3501 static const unsigned char glink_eh_frame_fde_64v1[] =
3503 0, 0, 0, 0, // Replaced with offset to .glink.
3504 0, 0, 0, 0, // Replaced with size of .glink.
3505 0, // Augmentation size.
3506 elfcpp::DW_CFA_advance_loc + 1,
3507 elfcpp::DW_CFA_register, 65, 12,
3508 elfcpp::DW_CFA_advance_loc + 4,
3509 elfcpp::DW_CFA_restore_extended, 65
3512 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3513 static const unsigned char glink_eh_frame_fde_64v2[] =
3515 0, 0, 0, 0, // Replaced with offset to .glink.
3516 0, 0, 0, 0, // Replaced with size of .glink.
3517 0, // Augmentation size.
3518 elfcpp::DW_CFA_advance_loc + 1,
3519 elfcpp::DW_CFA_register, 65, 0,
3520 elfcpp::DW_CFA_advance_loc + 4,
3521 elfcpp::DW_CFA_restore_extended, 65
3524 // Describe __glink_PLTresolve use of LR, 32-bit version.
3525 static const unsigned char glink_eh_frame_fde_32[] =
3527 0, 0, 0, 0, // Replaced with offset to .glink.
3528 0, 0, 0, 0, // Replaced with size of .glink.
3529 0, // Augmentation size.
3530 elfcpp::DW_CFA_advance_loc + 2,
3531 elfcpp::DW_CFA_register, 65, 0,
3532 elfcpp::DW_CFA_advance_loc + 4,
3533 elfcpp::DW_CFA_restore_extended, 65
3536 static const unsigned char default_fde[] =
3538 0, 0, 0, 0, // Replaced with offset to stubs.
3539 0, 0, 0, 0, // Replaced with size of stubs.
3540 0, // Augmentation size.
3541 elfcpp::DW_CFA_nop, // Pad.
3546 template<bool big_endian>
3548 write_insn(unsigned char* p, uint32_t v)
3550 elfcpp::Swap<32, big_endian>::writeval(p, v);
3553 // Stub_table holds information about plt and long branch stubs.
3554 // Stubs are built in an area following some input section determined
3555 // by group_sections(). This input section is converted to a relaxed
3556 // input section allowing it to be resized to accommodate the stubs
3558 template<int size, bool big_endian>
3559 class Stub_table : public Output_relaxed_input_section
3562 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3563 static const Address invalid_address = static_cast<Address>(0) - 1;
3565 Stub_table(Target_powerpc<size, big_endian>* targ,
3566 Output_section* output_section,
3567 const Output_section::Input_section* owner)
3568 : Output_relaxed_input_section(owner->relobj(), owner->shndx(),
3570 ->section_addralign(owner->shndx())),
3571 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
3572 orig_data_size_(owner->current_data_size()),
3573 plt_size_(0), last_plt_size_(0),
3574 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3576 this->set_output_section(output_section);
3578 std::vector<Output_relaxed_input_section*> new_relaxed;
3579 new_relaxed.push_back(this);
3580 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3583 // Add a plt call stub.
3585 add_plt_call_entry(Address,
3586 const Sized_relobj_file<size, big_endian>*,
3592 add_plt_call_entry(Address,
3593 const Sized_relobj_file<size, big_endian>*,
3598 // Find a given plt call stub.
3600 find_plt_call_entry(const Symbol*) const;
3603 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3604 unsigned int) const;
3607 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3613 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3618 // Add a long branch stub.
3620 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3621 unsigned int, Address, Address);
3624 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3628 can_reach_stub(Address from, unsigned int off, unsigned int r_type)
3630 unsigned long max_branch_offset = max_branch_delta(r_type);
3631 if (max_branch_offset == 0)
3633 gold_assert(from != invalid_address);
3634 Address loc = off + this->stub_address();
3635 return loc - from + max_branch_offset < 2 * max_branch_offset;
3639 clear_stubs(bool all)
3641 this->plt_call_stubs_.clear();
3642 this->plt_size_ = 0;
3643 this->long_branch_stubs_.clear();
3644 this->branch_size_ = 0;
3647 this->last_plt_size_ = 0;
3648 this->last_branch_size_ = 0;
3653 set_address_and_size(const Output_section* os, Address off)
3655 Address start_off = off;
3656 off += this->orig_data_size_;
3657 Address my_size = this->plt_size_ + this->branch_size_;
3659 off = align_address(off, this->stub_align());
3660 // Include original section size and alignment padding in size
3661 my_size += off - start_off;
3662 this->reset_address_and_file_offset();
3663 this->set_current_data_size(my_size);
3664 this->set_address_and_file_offset(os->address() + start_off,
3665 os->offset() + start_off);
3670 stub_address() const
3672 return align_address(this->address() + this->orig_data_size_,
3673 this->stub_align());
3679 return align_address(this->offset() + this->orig_data_size_,
3680 this->stub_align());
3685 { return this->plt_size_; }
3690 Output_section* os = this->output_section();
3691 if (os->addralign() < this->stub_align())
3693 os->set_addralign(this->stub_align());
3694 // FIXME: get rid of the insane checkpointing.
3695 // We can't increase alignment of the input section to which
3696 // stubs are attached; The input section may be .init which
3697 // is pasted together with other .init sections to form a
3698 // function. Aligning might insert zero padding resulting in
3699 // sigill. However we do need to increase alignment of the
3700 // output section so that the align_address() on offset in
3701 // set_address_and_size() adds the same padding as the
3702 // align_address() on address in stub_address().
3703 // What's more, we need this alignment for the layout done in
3704 // relaxation_loop_body() so that the output section starts at
3705 // a suitably aligned address.
3706 os->checkpoint_set_addralign(this->stub_align());
3708 if (this->last_plt_size_ != this->plt_size_
3709 || this->last_branch_size_ != this->branch_size_)
3711 this->last_plt_size_ = this->plt_size_;
3712 this->last_branch_size_ = this->branch_size_;
3718 // Add .eh_frame info for this stub section. Unlike other linker
3719 // generated .eh_frame this is added late in the link, because we
3720 // only want the .eh_frame info if this particular stub section is
3723 add_eh_frame(Layout* layout)
3725 if (!this->eh_frame_added_)
3727 if (!parameters->options().ld_generated_unwind_info())
3730 // Since we add stub .eh_frame info late, it must be placed
3731 // after all other linker generated .eh_frame info so that
3732 // merge mapping need not be updated for input sections.
3733 // There is no provision to use a different CIE to that used
3735 if (!this->targ_->has_glink())
3738 layout->add_eh_frame_for_plt(this,
3739 Eh_cie<size>::eh_frame_cie,
3740 sizeof (Eh_cie<size>::eh_frame_cie),
3742 sizeof (default_fde));
3743 this->eh_frame_added_ = true;
3747 Target_powerpc<size, big_endian>*
3753 class Plt_stub_ent_hash;
3754 typedef Unordered_map<Plt_stub_ent, unsigned int,
3755 Plt_stub_ent_hash> Plt_stub_entries;
3757 // Alignment of stub section.
3763 unsigned int min_align = 32;
3764 unsigned int user_align = 1 << parameters->options().plt_align();
3765 return std::max(user_align, min_align);
3768 // Return the plt offset for the given call stub.
3770 plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const
3772 const Symbol* gsym = p->first.sym_;
3775 *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC
3776 && gsym->can_use_relative_reloc(false));
3777 return gsym->plt_offset();
3782 const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
3783 unsigned int local_sym_index = p->first.locsym_;
3784 return relobj->local_plt_offset(local_sym_index);
3788 // Size of a given plt call stub.
3790 plt_call_size(typename Plt_stub_entries::const_iterator p) const
3796 Address plt_addr = this->plt_off(p, &is_iplt);
3798 plt_addr += this->targ_->iplt_section()->address();
3800 plt_addr += this->targ_->plt_section()->address();
3801 Address got_addr = this->targ_->got_section()->output_section()->address();
3802 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3803 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
3804 got_addr += ppcobj->toc_base_offset();
3805 Address off = plt_addr - got_addr;
3806 unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0);
3807 if (this->targ_->abiversion() < 2)
3809 bool static_chain = parameters->options().plt_static_chain();
3810 bool thread_safe = this->targ_->plt_thread_safe();
3814 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
3816 unsigned int align = 1 << parameters->options().plt_align();
3818 bytes = (bytes + align - 1) & -align;
3822 // Return long branch stub size.
3824 branch_stub_size(Address to)
3827 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
3828 if (to - loc + (1 << 25) < 2 << 25)
3830 if (size == 64 || !parameters->options().output_is_position_independent())
3837 do_write(Output_file*);
3839 // Plt call stub keys.
3843 Plt_stub_ent(const Symbol* sym)
3844 : sym_(sym), object_(0), addend_(0), locsym_(0)
3847 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3848 unsigned int locsym_index)
3849 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3852 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3854 unsigned int r_type,
3856 : sym_(sym), object_(0), addend_(0), locsym_(0)
3859 this->addend_ = addend;
3860 else if (parameters->options().output_is_position_independent()
3861 && r_type == elfcpp::R_PPC_PLTREL24)
3863 this->addend_ = addend;
3864 if (this->addend_ >= 32768)
3865 this->object_ = object;
3869 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3870 unsigned int locsym_index,
3871 unsigned int r_type,
3873 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3876 this->addend_ = addend;
3877 else if (parameters->options().output_is_position_independent()
3878 && r_type == elfcpp::R_PPC_PLTREL24)
3879 this->addend_ = addend;
3882 bool operator==(const Plt_stub_ent& that) const
3884 return (this->sym_ == that.sym_
3885 && this->object_ == that.object_
3886 && this->addend_ == that.addend_
3887 && this->locsym_ == that.locsym_);
3891 const Sized_relobj_file<size, big_endian>* object_;
3892 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
3893 unsigned int locsym_;
3896 class Plt_stub_ent_hash
3899 size_t operator()(const Plt_stub_ent& ent) const
3901 return (reinterpret_cast<uintptr_t>(ent.sym_)
3902 ^ reinterpret_cast<uintptr_t>(ent.object_)
3908 // Long branch stub keys.
3909 class Branch_stub_ent
3912 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to)
3913 : dest_(to), toc_base_off_(0)
3916 toc_base_off_ = obj->toc_base_offset();
3919 bool operator==(const Branch_stub_ent& that) const
3921 return (this->dest_ == that.dest_
3923 || this->toc_base_off_ == that.toc_base_off_));
3927 unsigned int toc_base_off_;
3930 class Branch_stub_ent_hash
3933 size_t operator()(const Branch_stub_ent& ent) const
3934 { return ent.dest_ ^ ent.toc_base_off_; }
3937 // In a sane world this would be a global.
3938 Target_powerpc<size, big_endian>* targ_;
3939 // Map sym/object/addend to stub offset.
3940 Plt_stub_entries plt_call_stubs_;
3941 // Map destination address to stub offset.
3942 typedef Unordered_map<Branch_stub_ent, unsigned int,
3943 Branch_stub_ent_hash> Branch_stub_entries;
3944 Branch_stub_entries long_branch_stubs_;
3945 // size of input section
3946 section_size_type orig_data_size_;
3948 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
3949 // Whether .eh_frame info has been created for this stub section.
3950 bool eh_frame_added_;
3953 // Add a plt call stub, if we do not already have one for this
3954 // sym/object/addend combo.
3956 template<int size, bool big_endian>
3958 Stub_table<size, big_endian>::add_plt_call_entry(
3960 const Sized_relobj_file<size, big_endian>* object,
3962 unsigned int r_type,
3965 Plt_stub_ent ent(object, gsym, r_type, addend);
3966 unsigned int off = this->plt_size_;
3967 std::pair<typename Plt_stub_entries::iterator, bool> p
3968 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3970 this->plt_size_ = off + this->plt_call_size(p.first);
3971 return this->can_reach_stub(from, off, r_type);
3974 template<int size, bool big_endian>
3976 Stub_table<size, big_endian>::add_plt_call_entry(
3978 const Sized_relobj_file<size, big_endian>* object,
3979 unsigned int locsym_index,
3980 unsigned int r_type,
3983 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3984 unsigned int off = this->plt_size_;
3985 std::pair<typename Plt_stub_entries::iterator, bool> p
3986 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3988 this->plt_size_ = off + this->plt_call_size(p.first);
3989 return this->can_reach_stub(from, off, r_type);
3992 // Find a plt call stub.
3994 template<int size, bool big_endian>
3995 typename Stub_table<size, big_endian>::Address
3996 Stub_table<size, big_endian>::find_plt_call_entry(
3997 const Sized_relobj_file<size, big_endian>* object,
3999 unsigned int r_type,
4000 Address addend) const
4002 Plt_stub_ent ent(object, gsym, r_type, addend);
4003 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4004 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4007 template<int size, bool big_endian>
4008 typename Stub_table<size, big_endian>::Address
4009 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
4011 Plt_stub_ent ent(gsym);
4012 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4013 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4016 template<int size, bool big_endian>
4017 typename Stub_table<size, big_endian>::Address
4018 Stub_table<size, big_endian>::find_plt_call_entry(
4019 const Sized_relobj_file<size, big_endian>* object,
4020 unsigned int locsym_index,
4021 unsigned int r_type,
4022 Address addend) const
4024 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4025 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4026 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4029 template<int size, bool big_endian>
4030 typename Stub_table<size, big_endian>::Address
4031 Stub_table<size, big_endian>::find_plt_call_entry(
4032 const Sized_relobj_file<size, big_endian>* object,
4033 unsigned int locsym_index) const
4035 Plt_stub_ent ent(object, locsym_index);
4036 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4037 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4040 // Add a long branch stub if we don't already have one to given
4043 template<int size, bool big_endian>
4045 Stub_table<size, big_endian>::add_long_branch_entry(
4046 const Powerpc_relobj<size, big_endian>* object,
4047 unsigned int r_type,
4051 Branch_stub_ent ent(object, to);
4052 Address off = this->branch_size_;
4053 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
4055 unsigned int stub_size = this->branch_stub_size(to);
4056 this->branch_size_ = off + stub_size;
4057 if (size == 64 && stub_size != 4)
4058 this->targ_->add_branch_lookup_table(to);
4060 return this->can_reach_stub(from, off, r_type);
4063 // Find long branch stub.
4065 template<int size, bool big_endian>
4066 typename Stub_table<size, big_endian>::Address
4067 Stub_table<size, big_endian>::find_long_branch_entry(
4068 const Powerpc_relobj<size, big_endian>* object,
4071 Branch_stub_ent ent(object, to);
4072 typename Branch_stub_entries::const_iterator p
4073 = this->long_branch_stubs_.find(ent);
4074 return p == this->long_branch_stubs_.end() ? invalid_address : p->second;
4077 // A class to handle .glink.
4079 template<int size, bool big_endian>
4080 class Output_data_glink : public Output_section_data
4083 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4084 static const Address invalid_address = static_cast<Address>(0) - 1;
4085 static const int pltresolve_size = 16*4;
4087 Output_data_glink(Target_powerpc<size, big_endian>* targ)
4088 : Output_section_data(16), targ_(targ), global_entry_stubs_(),
4089 end_branch_table_(), ge_size_(0)
4093 add_eh_frame(Layout* layout);
4096 add_global_entry(const Symbol*);
4099 find_global_entry(const Symbol*) const;
4102 global_entry_address() const
4104 gold_assert(this->is_data_size_valid());
4105 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4106 return this->address() + global_entry_off;
4110 // Write to a map file.
4112 do_print_to_mapfile(Mapfile* mapfile) const
4113 { mapfile->print_output_data(this, _("** glink")); }
4117 set_final_data_size();
4121 do_write(Output_file*);
4123 // Allows access to .got and .plt for do_write.
4124 Target_powerpc<size, big_endian>* targ_;
4126 // Map sym to stub offset.
4127 typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries;
4128 Global_entry_stub_entries global_entry_stubs_;
4130 unsigned int end_branch_table_, ge_size_;
4133 template<int size, bool big_endian>
4135 Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout)
4137 if (!parameters->options().ld_generated_unwind_info())
4142 if (this->targ_->abiversion() < 2)
4143 layout->add_eh_frame_for_plt(this,
4144 Eh_cie<64>::eh_frame_cie,
4145 sizeof (Eh_cie<64>::eh_frame_cie),
4146 glink_eh_frame_fde_64v1,
4147 sizeof (glink_eh_frame_fde_64v1));
4149 layout->add_eh_frame_for_plt(this,
4150 Eh_cie<64>::eh_frame_cie,
4151 sizeof (Eh_cie<64>::eh_frame_cie),
4152 glink_eh_frame_fde_64v2,
4153 sizeof (glink_eh_frame_fde_64v2));
4157 // 32-bit .glink can use the default since the CIE return
4158 // address reg, LR, is valid.
4159 layout->add_eh_frame_for_plt(this,
4160 Eh_cie<32>::eh_frame_cie,
4161 sizeof (Eh_cie<32>::eh_frame_cie),
4163 sizeof (default_fde));
4164 // Except where LR is used in a PIC __glink_PLTresolve.
4165 if (parameters->options().output_is_position_independent())
4166 layout->add_eh_frame_for_plt(this,
4167 Eh_cie<32>::eh_frame_cie,
4168 sizeof (Eh_cie<32>::eh_frame_cie),
4169 glink_eh_frame_fde_32,
4170 sizeof (glink_eh_frame_fde_32));
4174 template<int size, bool big_endian>
4176 Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym)
4178 std::pair<typename Global_entry_stub_entries::iterator, bool> p
4179 = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_));
4181 this->ge_size_ += 16;
4184 template<int size, bool big_endian>
4185 typename Output_data_glink<size, big_endian>::Address
4186 Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const
4188 typename Global_entry_stub_entries::const_iterator p
4189 = this->global_entry_stubs_.find(gsym);
4190 return p == this->global_entry_stubs_.end() ? invalid_address : p->second;
4193 template<int size, bool big_endian>
4195 Output_data_glink<size, big_endian>::set_final_data_size()
4197 unsigned int count = this->targ_->plt_entry_count();
4198 section_size_type total = 0;
4204 // space for branch table
4205 total += 4 * (count - 1);
4207 total += -total & 15;
4208 total += this->pltresolve_size;
4212 total += this->pltresolve_size;
4214 // space for branch table
4216 if (this->targ_->abiversion() < 2)
4220 total += 4 * (count - 0x8000);
4224 this->end_branch_table_ = total;
4225 total = (total + 15) & -16;
4226 total += this->ge_size_;
4228 this->set_data_size(total);
4231 // Write out plt and long branch stub code.
4233 template<int size, bool big_endian>
4235 Stub_table<size, big_endian>::do_write(Output_file* of)
4237 if (this->plt_call_stubs_.empty()
4238 && this->long_branch_stubs_.empty())
4241 const section_size_type start_off = this->offset();
4242 const section_size_type off = this->stub_offset();
4243 const section_size_type oview_size =
4244 convert_to_section_size_type(this->data_size() - (off - start_off));
4245 unsigned char* const oview = of->get_output_view(off, oview_size);
4250 const Output_data_got_powerpc<size, big_endian>* got
4251 = this->targ_->got_section();
4252 Address got_os_addr = got->output_section()->address();
4254 if (!this->plt_call_stubs_.empty())
4256 // The base address of the .plt section.
4257 Address plt_base = this->targ_->plt_section()->address();
4258 Address iplt_base = invalid_address;
4260 // Write out plt call stubs.
4261 typename Plt_stub_entries::const_iterator cs;
4262 for (cs = this->plt_call_stubs_.begin();
4263 cs != this->plt_call_stubs_.end();
4267 Address pltoff = this->plt_off(cs, &is_iplt);
4268 Address plt_addr = pltoff;
4271 if (iplt_base == invalid_address)
4272 iplt_base = this->targ_->iplt_section()->address();
4273 plt_addr += iplt_base;
4276 plt_addr += plt_base;
4277 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
4278 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
4279 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
4280 Address off = plt_addr - got_addr;
4282 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
4283 gold_error(_("%s: linkage table error against `%s'"),
4284 cs->first.object_->name().c_str(),
4285 cs->first.sym_->demangled_name().c_str());
4287 bool plt_load_toc = this->targ_->abiversion() < 2;
4289 = plt_load_toc && parameters->options().plt_static_chain();
4291 = plt_load_toc && this->targ_->plt_thread_safe();
4292 bool use_fake_dep = false;
4293 Address cmp_branch_off = 0;
4296 unsigned int pltindex
4297 = ((pltoff - this->targ_->first_plt_entry_offset())
4298 / this->targ_->plt_entry_size());
4300 = (this->targ_->glink_section()->pltresolve_size
4302 if (pltindex > 32768)
4303 glinkoff += (pltindex - 32768) * 4;
4305 = this->targ_->glink_section()->address() + glinkoff;
4307 = (this->stub_address() + cs->second + 24
4308 + 4 * (ha(off) != 0)
4309 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
4310 + 4 * static_chain);
4311 cmp_branch_off = to - from;
4312 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
4315 p = oview + cs->second;
4318 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4322 write_insn<big_endian>(p, addis_11_2 + ha(off));
4324 write_insn<big_endian>(p, ld_12_11 + l(off));
4329 write_insn<big_endian>(p, addis_12_2 + ha(off));
4331 write_insn<big_endian>(p, ld_12_12 + l(off));
4335 && ha(off + 8 + 8 * static_chain) != ha(off))
4337 write_insn<big_endian>(p, addi_11_11 + l(off));
4341 write_insn<big_endian>(p, mtctr_12);
4347 write_insn<big_endian>(p, xor_2_12_12);
4349 write_insn<big_endian>(p, add_11_11_2);
4352 write_insn<big_endian>(p, ld_2_11 + l(off + 8));
4356 write_insn<big_endian>(p, ld_11_11 + l(off + 16));
4363 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4365 write_insn<big_endian>(p, ld_12_2 + l(off));
4368 && ha(off + 8 + 8 * static_chain) != ha(off))
4370 write_insn<big_endian>(p, addi_2_2 + l(off));
4374 write_insn<big_endian>(p, mtctr_12);
4380 write_insn<big_endian>(p, xor_11_12_12);
4382 write_insn<big_endian>(p, add_2_2_11);
4387 write_insn<big_endian>(p, ld_11_2 + l(off + 16));
4390 write_insn<big_endian>(p, ld_2_2 + l(off + 8));
4394 if (thread_safe && !use_fake_dep)
4396 write_insn<big_endian>(p, cmpldi_2_0);
4398 write_insn<big_endian>(p, bnectr_p4);
4400 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
4403 write_insn<big_endian>(p, bctr);
4407 // Write out long branch stubs.
4408 typename Branch_stub_entries::const_iterator bs;
4409 for (bs = this->long_branch_stubs_.begin();
4410 bs != this->long_branch_stubs_.end();
4413 p = oview + this->plt_size_ + bs->second;
4414 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4415 Address delta = bs->first.dest_ - loc;
4416 if (delta + (1 << 25) < 2 << 25)
4417 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4421 = this->targ_->find_branch_lookup_table(bs->first.dest_);
4422 gold_assert(brlt_addr != invalid_address);
4423 brlt_addr += this->targ_->brlt_section()->address();
4424 Address got_addr = got_os_addr + bs->first.toc_base_off_;
4425 Address brltoff = brlt_addr - got_addr;
4426 if (ha(brltoff) == 0)
4428 write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4;
4432 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
4433 write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4;
4435 write_insn<big_endian>(p, mtctr_12), p += 4;
4436 write_insn<big_endian>(p, bctr);
4442 if (!this->plt_call_stubs_.empty())
4444 // The base address of the .plt section.
4445 Address plt_base = this->targ_->plt_section()->address();
4446 Address iplt_base = invalid_address;
4447 // The address of _GLOBAL_OFFSET_TABLE_.
4448 Address g_o_t = invalid_address;
4450 // Write out plt call stubs.
4451 typename Plt_stub_entries::const_iterator cs;
4452 for (cs = this->plt_call_stubs_.begin();
4453 cs != this->plt_call_stubs_.end();
4457 Address plt_addr = this->plt_off(cs, &is_iplt);
4460 if (iplt_base == invalid_address)
4461 iplt_base = this->targ_->iplt_section()->address();
4462 plt_addr += iplt_base;
4465 plt_addr += plt_base;
4467 p = oview + cs->second;
4468 if (parameters->options().output_is_position_independent())
4471 const Powerpc_relobj<size, big_endian>* ppcobj
4472 = (static_cast<const Powerpc_relobj<size, big_endian>*>
4473 (cs->first.object_));
4474 if (ppcobj != NULL && cs->first.addend_ >= 32768)
4476 unsigned int got2 = ppcobj->got2_shndx();
4477 got_addr = ppcobj->get_output_section_offset(got2);
4478 gold_assert(got_addr != invalid_address);
4479 got_addr += (ppcobj->output_section(got2)->address()
4480 + cs->first.addend_);
4484 if (g_o_t == invalid_address)
4486 const Output_data_got_powerpc<size, big_endian>* got
4487 = this->targ_->got_section();
4488 g_o_t = got->address() + got->g_o_t();
4493 Address off = plt_addr - got_addr;
4496 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
4497 write_insn<big_endian>(p + 4, mtctr_11);
4498 write_insn<big_endian>(p + 8, bctr);
4502 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
4503 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
4504 write_insn<big_endian>(p + 8, mtctr_11);
4505 write_insn<big_endian>(p + 12, bctr);
4510 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
4511 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
4512 write_insn<big_endian>(p + 8, mtctr_11);
4513 write_insn<big_endian>(p + 12, bctr);
4518 // Write out long branch stubs.
4519 typename Branch_stub_entries::const_iterator bs;
4520 for (bs = this->long_branch_stubs_.begin();
4521 bs != this->long_branch_stubs_.end();
4524 p = oview + this->plt_size_ + bs->second;
4525 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4526 Address delta = bs->first.dest_ - loc;
4527 if (delta + (1 << 25) < 2 << 25)
4528 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4529 else if (!parameters->options().output_is_position_independent())
4531 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
4532 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
4533 write_insn<big_endian>(p + 8, mtctr_12);
4534 write_insn<big_endian>(p + 12, bctr);
4539 write_insn<big_endian>(p + 0, mflr_0);
4540 write_insn<big_endian>(p + 4, bcl_20_31);
4541 write_insn<big_endian>(p + 8, mflr_12);
4542 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
4543 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
4544 write_insn<big_endian>(p + 20, mtlr_0);
4545 write_insn<big_endian>(p + 24, mtctr_12);
4546 write_insn<big_endian>(p + 28, bctr);
4552 // Write out .glink.
4554 template<int size, bool big_endian>
4556 Output_data_glink<size, big_endian>::do_write(Output_file* of)
4558 const section_size_type off = this->offset();
4559 const section_size_type oview_size =
4560 convert_to_section_size_type(this->data_size());
4561 unsigned char* const oview = of->get_output_view(off, oview_size);
4564 // The base address of the .plt section.
4565 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4566 Address plt_base = this->targ_->plt_section()->address();
4570 if (this->end_branch_table_ != 0)
4572 // Write pltresolve stub.
4574 Address after_bcl = this->address() + 16;
4575 Address pltoff = plt_base - after_bcl;
4577 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
4579 if (this->targ_->abiversion() < 2)
4581 write_insn<big_endian>(p, mflr_12), p += 4;
4582 write_insn<big_endian>(p, bcl_20_31), p += 4;
4583 write_insn<big_endian>(p, mflr_11), p += 4;
4584 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4585 write_insn<big_endian>(p, mtlr_12), p += 4;
4586 write_insn<big_endian>(p, add_11_2_11), p += 4;
4587 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4588 write_insn<big_endian>(p, ld_2_11 + 8), p += 4;
4589 write_insn<big_endian>(p, mtctr_12), p += 4;
4590 write_insn<big_endian>(p, ld_11_11 + 16), p += 4;
4594 write_insn<big_endian>(p, mflr_0), p += 4;
4595 write_insn<big_endian>(p, bcl_20_31), p += 4;
4596 write_insn<big_endian>(p, mflr_11), p += 4;
4597 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4598 write_insn<big_endian>(p, mtlr_0), p += 4;
4599 write_insn<big_endian>(p, sub_12_12_11), p += 4;
4600 write_insn<big_endian>(p, add_11_2_11), p += 4;
4601 write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4;
4602 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4603 write_insn<big_endian>(p, srdi_0_0_2), p += 4;
4604 write_insn<big_endian>(p, mtctr_12), p += 4;
4605 write_insn<big_endian>(p, ld_11_11 + 8), p += 4;
4607 write_insn<big_endian>(p, bctr), p += 4;
4608 while (p < oview + this->pltresolve_size)
4609 write_insn<big_endian>(p, nop), p += 4;
4611 // Write lazy link call stubs.
4613 while (p < oview + this->end_branch_table_)
4615 if (this->targ_->abiversion() < 2)
4619 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
4623 write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4;
4624 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
4627 uint32_t branch_off = 8 - (p - oview);
4628 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
4633 Address plt_base = this->targ_->plt_section()->address();
4634 Address iplt_base = invalid_address;
4635 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4636 Address global_entry_base = this->address() + global_entry_off;
4637 typename Global_entry_stub_entries::const_iterator ge;
4638 for (ge = this->global_entry_stubs_.begin();
4639 ge != this->global_entry_stubs_.end();
4642 p = oview + global_entry_off + ge->second;
4643 Address plt_addr = ge->first->plt_offset();
4644 if (ge->first->type() == elfcpp::STT_GNU_IFUNC
4645 && ge->first->can_use_relative_reloc(false))
4647 if (iplt_base == invalid_address)
4648 iplt_base = this->targ_->iplt_section()->address();
4649 plt_addr += iplt_base;
4652 plt_addr += plt_base;
4653 Address my_addr = global_entry_base + ge->second;
4654 Address off = plt_addr - my_addr;
4656 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
4657 gold_error(_("%s: linkage table error against `%s'"),
4658 ge->first->object()->name().c_str(),
4659 ge->first->demangled_name().c_str());
4661 write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4;
4662 write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4;
4663 write_insn<big_endian>(p, mtctr_12), p += 4;
4664 write_insn<big_endian>(p, bctr);
4669 const Output_data_got_powerpc<size, big_endian>* got
4670 = this->targ_->got_section();
4671 // The address of _GLOBAL_OFFSET_TABLE_.
4672 Address g_o_t = got->address() + got->g_o_t();
4674 // Write out pltresolve branch table.
4676 unsigned int the_end = oview_size - this->pltresolve_size;
4677 unsigned char* end_p = oview + the_end;
4678 while (p < end_p - 8 * 4)
4679 write_insn<big_endian>(p, b + end_p - p), p += 4;
4681 write_insn<big_endian>(p, nop), p += 4;
4683 // Write out pltresolve call stub.
4684 if (parameters->options().output_is_position_independent())
4686 Address res0_off = 0;
4687 Address after_bcl_off = the_end + 12;
4688 Address bcl_res0 = after_bcl_off - res0_off;
4690 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
4691 write_insn<big_endian>(p + 4, mflr_0);
4692 write_insn<big_endian>(p + 8, bcl_20_31);
4693 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
4694 write_insn<big_endian>(p + 16, mflr_12);
4695 write_insn<big_endian>(p + 20, mtlr_0);
4696 write_insn<big_endian>(p + 24, sub_11_11_12);
4698 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
4700 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
4701 if (ha(got_bcl) == ha(got_bcl + 4))
4703 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
4704 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
4708 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
4709 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
4711 write_insn<big_endian>(p + 40, mtctr_0);
4712 write_insn<big_endian>(p + 44, add_0_11_11);
4713 write_insn<big_endian>(p + 48, add_11_0_11);
4714 write_insn<big_endian>(p + 52, bctr);
4715 write_insn<big_endian>(p + 56, nop);
4716 write_insn<big_endian>(p + 60, nop);
4720 Address res0 = this->address();
4722 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
4723 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
4724 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4725 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
4727 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
4728 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
4729 write_insn<big_endian>(p + 16, mtctr_0);
4730 write_insn<big_endian>(p + 20, add_0_11_11);
4731 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4732 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
4734 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
4735 write_insn<big_endian>(p + 28, add_11_0_11);
4736 write_insn<big_endian>(p + 32, bctr);
4737 write_insn<big_endian>(p + 36, nop);
4738 write_insn<big_endian>(p + 40, nop);
4739 write_insn<big_endian>(p + 44, nop);
4740 write_insn<big_endian>(p + 48, nop);
4741 write_insn<big_endian>(p + 52, nop);
4742 write_insn<big_endian>(p + 56, nop);
4743 write_insn<big_endian>(p + 60, nop);
4748 of->write_output_view(off, oview_size, oview);
4752 // A class to handle linker generated save/restore functions.
4754 template<int size, bool big_endian>
4755 class Output_data_save_res : public Output_section_data_build
4758 Output_data_save_res(Symbol_table* symtab);
4761 // Write to a map file.
4763 do_print_to_mapfile(Mapfile* mapfile) const
4764 { mapfile->print_output_data(this, _("** save/restore")); }
4767 do_write(Output_file*);
4770 // The maximum size of save/restore contents.
4771 static const unsigned int savres_max = 218*4;
4774 savres_define(Symbol_table* symtab,
4776 unsigned int lo, unsigned int hi,
4777 unsigned char* write_ent(unsigned char*, int),
4778 unsigned char* write_tail(unsigned char*, int));
4780 unsigned char *contents_;
4783 template<bool big_endian>
4784 static unsigned char*
4785 savegpr0(unsigned char* p, int r)
4787 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4788 write_insn<big_endian>(p, insn);
4792 template<bool big_endian>
4793 static unsigned char*
4794 savegpr0_tail(unsigned char* p, int r)
4796 p = savegpr0<big_endian>(p, r);
4797 uint32_t insn = std_0_1 + 16;
4798 write_insn<big_endian>(p, insn);
4800 write_insn<big_endian>(p, blr);
4804 template<bool big_endian>
4805 static unsigned char*
4806 restgpr0(unsigned char* p, int r)
4808 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4809 write_insn<big_endian>(p, insn);
4813 template<bool big_endian>
4814 static unsigned char*
4815 restgpr0_tail(unsigned char* p, int r)
4817 uint32_t insn = ld_0_1 + 16;
4818 write_insn<big_endian>(p, insn);
4820 p = restgpr0<big_endian>(p, r);
4821 write_insn<big_endian>(p, mtlr_0);
4825 p = restgpr0<big_endian>(p, 30);
4826 p = restgpr0<big_endian>(p, 31);
4828 write_insn<big_endian>(p, blr);
4832 template<bool big_endian>
4833 static unsigned char*
4834 savegpr1(unsigned char* p, int r)
4836 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4837 write_insn<big_endian>(p, insn);
4841 template<bool big_endian>
4842 static unsigned char*
4843 savegpr1_tail(unsigned char* p, int r)
4845 p = savegpr1<big_endian>(p, r);
4846 write_insn<big_endian>(p, blr);
4850 template<bool big_endian>
4851 static unsigned char*
4852 restgpr1(unsigned char* p, int r)
4854 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4855 write_insn<big_endian>(p, insn);
4859 template<bool big_endian>
4860 static unsigned char*
4861 restgpr1_tail(unsigned char* p, int r)
4863 p = restgpr1<big_endian>(p, r);
4864 write_insn<big_endian>(p, blr);
4868 template<bool big_endian>
4869 static unsigned char*
4870 savefpr(unsigned char* p, int r)
4872 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4873 write_insn<big_endian>(p, insn);
4877 template<bool big_endian>
4878 static unsigned char*
4879 savefpr0_tail(unsigned char* p, int r)
4881 p = savefpr<big_endian>(p, r);
4882 write_insn<big_endian>(p, std_0_1 + 16);
4884 write_insn<big_endian>(p, blr);
4888 template<bool big_endian>
4889 static unsigned char*
4890 restfpr(unsigned char* p, int r)
4892 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4893 write_insn<big_endian>(p, insn);
4897 template<bool big_endian>
4898 static unsigned char*
4899 restfpr0_tail(unsigned char* p, int r)
4901 write_insn<big_endian>(p, ld_0_1 + 16);
4903 p = restfpr<big_endian>(p, r);
4904 write_insn<big_endian>(p, mtlr_0);
4908 p = restfpr<big_endian>(p, 30);
4909 p = restfpr<big_endian>(p, 31);
4911 write_insn<big_endian>(p, blr);
4915 template<bool big_endian>
4916 static unsigned char*
4917 savefpr1_tail(unsigned char* p, int r)
4919 p = savefpr<big_endian>(p, r);
4920 write_insn<big_endian>(p, blr);
4924 template<bool big_endian>
4925 static unsigned char*
4926 restfpr1_tail(unsigned char* p, int r)
4928 p = restfpr<big_endian>(p, r);
4929 write_insn<big_endian>(p, blr);
4933 template<bool big_endian>
4934 static unsigned char*
4935 savevr(unsigned char* p, int r)
4937 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
4938 write_insn<big_endian>(p, insn);
4940 insn = stvx_0_12_0 + (r << 21);
4941 write_insn<big_endian>(p, insn);
4945 template<bool big_endian>
4946 static unsigned char*
4947 savevr_tail(unsigned char* p, int r)
4949 p = savevr<big_endian>(p, r);
4950 write_insn<big_endian>(p, blr);
4954 template<bool big_endian>
4955 static unsigned char*
4956 restvr(unsigned char* p, int r)
4958 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
4959 write_insn<big_endian>(p, insn);
4961 insn = lvx_0_12_0 + (r << 21);
4962 write_insn<big_endian>(p, insn);
4966 template<bool big_endian>
4967 static unsigned char*
4968 restvr_tail(unsigned char* p, int r)
4970 p = restvr<big_endian>(p, r);
4971 write_insn<big_endian>(p, blr);
4976 template<int size, bool big_endian>
4977 Output_data_save_res<size, big_endian>::Output_data_save_res(
4978 Symbol_table* symtab)
4979 : Output_section_data_build(4),
4982 this->savres_define(symtab,
4983 "_savegpr0_", 14, 31,
4984 savegpr0<big_endian>, savegpr0_tail<big_endian>);
4985 this->savres_define(symtab,
4986 "_restgpr0_", 14, 29,
4987 restgpr0<big_endian>, restgpr0_tail<big_endian>);
4988 this->savres_define(symtab,
4989 "_restgpr0_", 30, 31,
4990 restgpr0<big_endian>, restgpr0_tail<big_endian>);
4991 this->savres_define(symtab,
4992 "_savegpr1_", 14, 31,
4993 savegpr1<big_endian>, savegpr1_tail<big_endian>);
4994 this->savres_define(symtab,
4995 "_restgpr1_", 14, 31,
4996 restgpr1<big_endian>, restgpr1_tail<big_endian>);
4997 this->savres_define(symtab,
4998 "_savefpr_", 14, 31,
4999 savefpr<big_endian>, savefpr0_tail<big_endian>);
5000 this->savres_define(symtab,
5001 "_restfpr_", 14, 29,
5002 restfpr<big_endian>, restfpr0_tail<big_endian>);
5003 this->savres_define(symtab,
5004 "_restfpr_", 30, 31,
5005 restfpr<big_endian>, restfpr0_tail<big_endian>);
5006 this->savres_define(symtab,
5008 savefpr<big_endian>, savefpr1_tail<big_endian>);
5009 this->savres_define(symtab,
5011 restfpr<big_endian>, restfpr1_tail<big_endian>);
5012 this->savres_define(symtab,
5014 savevr<big_endian>, savevr_tail<big_endian>);
5015 this->savres_define(symtab,
5017 restvr<big_endian>, restvr_tail<big_endian>);
5020 template<int size, bool big_endian>
5022 Output_data_save_res<size, big_endian>::savres_define(
5023 Symbol_table* symtab,
5025 unsigned int lo, unsigned int hi,
5026 unsigned char* write_ent(unsigned char*, int),
5027 unsigned char* write_tail(unsigned char*, int))
5029 size_t len = strlen(name);
5030 bool writing = false;
5033 memcpy(sym, name, len);
5036 for (unsigned int i = lo; i <= hi; i++)
5038 sym[len + 0] = i / 10 + '0';
5039 sym[len + 1] = i % 10 + '0';
5040 Symbol* gsym = symtab->lookup(sym);
5041 bool refd = gsym != NULL && gsym->is_undefined();
5042 writing = writing || refd;
5045 if (this->contents_ == NULL)
5046 this->contents_ = new unsigned char[this->savres_max];
5048 section_size_type value = this->current_data_size();
5049 unsigned char* p = this->contents_ + value;
5051 p = write_ent(p, i);
5053 p = write_tail(p, i);
5054 section_size_type cur_size = p - this->contents_;
5055 this->set_current_data_size(cur_size);
5057 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
5058 this, value, cur_size - value,
5059 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
5060 elfcpp::STV_HIDDEN, 0, false, false);
5065 // Write out save/restore.
5067 template<int size, bool big_endian>
5069 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
5071 const section_size_type off = this->offset();
5072 const section_size_type oview_size =
5073 convert_to_section_size_type(this->data_size());
5074 unsigned char* const oview = of->get_output_view(off, oview_size);
5075 memcpy(oview, this->contents_, oview_size);
5076 of->write_output_view(off, oview_size, oview);
5080 // Create the glink section.
5082 template<int size, bool big_endian>
5084 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
5086 if (this->glink_ == NULL)
5088 this->glink_ = new Output_data_glink<size, big_endian>(this);
5089 this->glink_->add_eh_frame(layout);
5090 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5091 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5092 this->glink_, ORDER_TEXT, false);
5096 // Create a PLT entry for a global symbol.
5098 template<int size, bool big_endian>
5100 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
5104 if (gsym->type() == elfcpp::STT_GNU_IFUNC
5105 && gsym->can_use_relative_reloc(false))
5107 if (this->iplt_ == NULL)
5108 this->make_iplt_section(symtab, layout);
5109 this->iplt_->add_ifunc_entry(gsym);
5113 if (this->plt_ == NULL)
5114 this->make_plt_section(symtab, layout);
5115 this->plt_->add_entry(gsym);
5119 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5121 template<int size, bool big_endian>
5123 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
5124 Symbol_table* symtab,
5126 Sized_relobj_file<size, big_endian>* relobj,
5129 if (this->iplt_ == NULL)
5130 this->make_iplt_section(symtab, layout);
5131 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
5134 // Return the number of entries in the PLT.
5136 template<int size, bool big_endian>
5138 Target_powerpc<size, big_endian>::plt_entry_count() const
5140 if (this->plt_ == NULL)
5142 return this->plt_->entry_count();
5145 // Create a GOT entry for local dynamic __tls_get_addr calls.
5147 template<int size, bool big_endian>
5149 Target_powerpc<size, big_endian>::tlsld_got_offset(
5150 Symbol_table* symtab,
5152 Sized_relobj_file<size, big_endian>* object)
5154 if (this->tlsld_got_offset_ == -1U)
5156 gold_assert(symtab != NULL && layout != NULL && object != NULL);
5157 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
5158 Output_data_got_powerpc<size, big_endian>* got
5159 = this->got_section(symtab, layout);
5160 unsigned int got_offset = got->add_constant_pair(0, 0);
5161 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
5163 this->tlsld_got_offset_ = got_offset;
5165 return this->tlsld_got_offset_;
5168 // Get the Reference_flags for a particular relocation.
5170 template<int size, bool big_endian>
5172 Target_powerpc<size, big_endian>::Scan::get_reference_flags(
5173 unsigned int r_type,
5174 const Target_powerpc* target)
5180 case elfcpp::R_POWERPC_NONE:
5181 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5182 case elfcpp::R_POWERPC_GNU_VTENTRY:
5183 case elfcpp::R_PPC64_TOC:
5184 // No symbol reference.
5187 case elfcpp::R_PPC64_ADDR64:
5188 case elfcpp::R_PPC64_UADDR64:
5189 case elfcpp::R_POWERPC_ADDR32:
5190 case elfcpp::R_POWERPC_UADDR32:
5191 case elfcpp::R_POWERPC_ADDR16:
5192 case elfcpp::R_POWERPC_UADDR16:
5193 case elfcpp::R_POWERPC_ADDR16_LO:
5194 case elfcpp::R_POWERPC_ADDR16_HI:
5195 case elfcpp::R_POWERPC_ADDR16_HA:
5196 ref = Symbol::ABSOLUTE_REF;
5199 case elfcpp::R_POWERPC_ADDR24:
5200 case elfcpp::R_POWERPC_ADDR14:
5201 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5202 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5203 ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
5206 case elfcpp::R_PPC64_REL64:
5207 case elfcpp::R_POWERPC_REL32:
5208 case elfcpp::R_PPC_LOCAL24PC:
5209 case elfcpp::R_POWERPC_REL16:
5210 case elfcpp::R_POWERPC_REL16_LO:
5211 case elfcpp::R_POWERPC_REL16_HI:
5212 case elfcpp::R_POWERPC_REL16_HA:
5213 ref = Symbol::RELATIVE_REF;
5216 case elfcpp::R_POWERPC_REL24:
5217 case elfcpp::R_PPC_PLTREL24:
5218 case elfcpp::R_POWERPC_REL14:
5219 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5220 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5221 ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
5224 case elfcpp::R_POWERPC_GOT16:
5225 case elfcpp::R_POWERPC_GOT16_LO:
5226 case elfcpp::R_POWERPC_GOT16_HI:
5227 case elfcpp::R_POWERPC_GOT16_HA:
5228 case elfcpp::R_PPC64_GOT16_DS:
5229 case elfcpp::R_PPC64_GOT16_LO_DS:
5230 case elfcpp::R_PPC64_TOC16:
5231 case elfcpp::R_PPC64_TOC16_LO:
5232 case elfcpp::R_PPC64_TOC16_HI:
5233 case elfcpp::R_PPC64_TOC16_HA:
5234 case elfcpp::R_PPC64_TOC16_DS:
5235 case elfcpp::R_PPC64_TOC16_LO_DS:
5237 ref = Symbol::ABSOLUTE_REF;
5240 case elfcpp::R_POWERPC_GOT_TPREL16:
5241 case elfcpp::R_POWERPC_TLS:
5242 ref = Symbol::TLS_REF;
5245 case elfcpp::R_POWERPC_COPY:
5246 case elfcpp::R_POWERPC_GLOB_DAT:
5247 case elfcpp::R_POWERPC_JMP_SLOT:
5248 case elfcpp::R_POWERPC_RELATIVE:
5249 case elfcpp::R_POWERPC_DTPMOD:
5251 // Not expected. We will give an error later.
5255 if (size == 64 && target->abiversion() < 2)
5256 ref |= Symbol::FUNC_DESC_ABI;
5260 // Report an unsupported relocation against a local symbol.
5262 template<int size, bool big_endian>
5264 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
5265 Sized_relobj_file<size, big_endian>* object,
5266 unsigned int r_type)
5268 gold_error(_("%s: unsupported reloc %u against local symbol"),
5269 object->name().c_str(), r_type);
5272 // We are about to emit a dynamic relocation of type R_TYPE. If the
5273 // dynamic linker does not support it, issue an error.
5275 template<int size, bool big_endian>
5277 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
5278 unsigned int r_type)
5280 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
5282 // These are the relocation types supported by glibc for both 32-bit
5283 // and 64-bit powerpc.
5286 case elfcpp::R_POWERPC_NONE:
5287 case elfcpp::R_POWERPC_RELATIVE:
5288 case elfcpp::R_POWERPC_GLOB_DAT:
5289 case elfcpp::R_POWERPC_DTPMOD:
5290 case elfcpp::R_POWERPC_DTPREL:
5291 case elfcpp::R_POWERPC_TPREL:
5292 case elfcpp::R_POWERPC_JMP_SLOT:
5293 case elfcpp::R_POWERPC_COPY:
5294 case elfcpp::R_POWERPC_IRELATIVE:
5295 case elfcpp::R_POWERPC_ADDR32:
5296 case elfcpp::R_POWERPC_UADDR32:
5297 case elfcpp::R_POWERPC_ADDR24:
5298 case elfcpp::R_POWERPC_ADDR16:
5299 case elfcpp::R_POWERPC_UADDR16:
5300 case elfcpp::R_POWERPC_ADDR16_LO:
5301 case elfcpp::R_POWERPC_ADDR16_HI:
5302 case elfcpp::R_POWERPC_ADDR16_HA:
5303 case elfcpp::R_POWERPC_ADDR14:
5304 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5305 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5306 case elfcpp::R_POWERPC_REL32:
5307 case elfcpp::R_POWERPC_REL24:
5308 case elfcpp::R_POWERPC_TPREL16:
5309 case elfcpp::R_POWERPC_TPREL16_LO:
5310 case elfcpp::R_POWERPC_TPREL16_HI:
5311 case elfcpp::R_POWERPC_TPREL16_HA:
5322 // These are the relocation types supported only on 64-bit.
5323 case elfcpp::R_PPC64_ADDR64:
5324 case elfcpp::R_PPC64_UADDR64:
5325 case elfcpp::R_PPC64_JMP_IREL:
5326 case elfcpp::R_PPC64_ADDR16_DS:
5327 case elfcpp::R_PPC64_ADDR16_LO_DS:
5328 case elfcpp::R_PPC64_ADDR16_HIGH:
5329 case elfcpp::R_PPC64_ADDR16_HIGHA:
5330 case elfcpp::R_PPC64_ADDR16_HIGHER:
5331 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5332 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5333 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5334 case elfcpp::R_PPC64_REL64:
5335 case elfcpp::R_POWERPC_ADDR30:
5336 case elfcpp::R_PPC64_TPREL16_DS:
5337 case elfcpp::R_PPC64_TPREL16_LO_DS:
5338 case elfcpp::R_PPC64_TPREL16_HIGH:
5339 case elfcpp::R_PPC64_TPREL16_HIGHA:
5340 case elfcpp::R_PPC64_TPREL16_HIGHER:
5341 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5342 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5343 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5354 // These are the relocation types supported only on 32-bit.
5355 // ??? glibc ld.so doesn't need to support these.
5356 case elfcpp::R_POWERPC_DTPREL16:
5357 case elfcpp::R_POWERPC_DTPREL16_LO:
5358 case elfcpp::R_POWERPC_DTPREL16_HI:
5359 case elfcpp::R_POWERPC_DTPREL16_HA:
5367 // This prevents us from issuing more than one error per reloc
5368 // section. But we can still wind up issuing more than one
5369 // error per object file.
5370 if (this->issued_non_pic_error_)
5372 gold_assert(parameters->options().output_is_position_independent());
5373 object->error(_("requires unsupported dynamic reloc; "
5374 "recompile with -fPIC"));
5375 this->issued_non_pic_error_ = true;
5379 // Return whether we need to make a PLT entry for a relocation of the
5380 // given type against a STT_GNU_IFUNC symbol.
5382 template<int size, bool big_endian>
5384 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
5385 Target_powerpc<size, big_endian>* target,
5386 Sized_relobj_file<size, big_endian>* object,
5387 unsigned int r_type,
5390 // In non-pic code any reference will resolve to the plt call stub
5391 // for the ifunc symbol.
5392 if ((size == 32 || target->abiversion() >= 2)
5393 && !parameters->options().output_is_position_independent())
5398 // Word size refs from data sections are OK, but don't need a PLT entry.
5399 case elfcpp::R_POWERPC_ADDR32:
5400 case elfcpp::R_POWERPC_UADDR32:
5405 case elfcpp::R_PPC64_ADDR64:
5406 case elfcpp::R_PPC64_UADDR64:
5411 // GOT refs are good, but also don't need a PLT entry.
5412 case elfcpp::R_POWERPC_GOT16:
5413 case elfcpp::R_POWERPC_GOT16_LO:
5414 case elfcpp::R_POWERPC_GOT16_HI:
5415 case elfcpp::R_POWERPC_GOT16_HA:
5416 case elfcpp::R_PPC64_GOT16_DS:
5417 case elfcpp::R_PPC64_GOT16_LO_DS:
5420 // Function calls are good, and these do need a PLT entry.
5421 case elfcpp::R_POWERPC_ADDR24:
5422 case elfcpp::R_POWERPC_ADDR14:
5423 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5424 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5425 case elfcpp::R_POWERPC_REL24:
5426 case elfcpp::R_PPC_PLTREL24:
5427 case elfcpp::R_POWERPC_REL14:
5428 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5429 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5436 // Anything else is a problem.
5437 // If we are building a static executable, the libc startup function
5438 // responsible for applying indirect function relocations is going
5439 // to complain about the reloc type.
5440 // If we are building a dynamic executable, we will have a text
5441 // relocation. The dynamic loader will set the text segment
5442 // writable and non-executable to apply text relocations. So we'll
5443 // segfault when trying to run the indirection function to resolve
5446 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5447 object->name().c_str(), r_type);
5451 // Scan a relocation for a local symbol.
5453 template<int size, bool big_endian>
5455 Target_powerpc<size, big_endian>::Scan::local(
5456 Symbol_table* symtab,
5458 Target_powerpc<size, big_endian>* target,
5459 Sized_relobj_file<size, big_endian>* object,
5460 unsigned int data_shndx,
5461 Output_section* output_section,
5462 const elfcpp::Rela<size, big_endian>& reloc,
5463 unsigned int r_type,
5464 const elfcpp::Sym<size, big_endian>& lsym,
5467 this->maybe_skip_tls_get_addr_call(r_type, NULL);
5469 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5470 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5472 this->expect_tls_get_addr_call();
5473 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5474 if (tls_type != tls::TLSOPT_NONE)
5475 this->skip_next_tls_get_addr_call();
5477 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5478 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5480 this->expect_tls_get_addr_call();
5481 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5482 if (tls_type != tls::TLSOPT_NONE)
5483 this->skip_next_tls_get_addr_call();
5486 Powerpc_relobj<size, big_endian>* ppc_object
5487 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5492 && data_shndx == ppc_object->opd_shndx()
5493 && r_type == elfcpp::R_PPC64_ADDR64)
5494 ppc_object->set_opd_discard(reloc.get_r_offset());
5498 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5499 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
5500 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5502 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5503 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5504 r_type, r_sym, reloc.get_r_addend());
5505 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
5510 case elfcpp::R_POWERPC_NONE:
5511 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5512 case elfcpp::R_POWERPC_GNU_VTENTRY:
5513 case elfcpp::R_PPC64_TOCSAVE:
5514 case elfcpp::R_POWERPC_TLS:
5517 case elfcpp::R_PPC64_TOC:
5519 Output_data_got_powerpc<size, big_endian>* got
5520 = target->got_section(symtab, layout);
5521 if (parameters->options().output_is_position_independent())
5523 Address off = reloc.get_r_offset();
5525 && target->abiversion() < 2
5526 && data_shndx == ppc_object->opd_shndx()
5527 && ppc_object->get_opd_discard(off - 8))
5530 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5531 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5532 rela_dyn->add_output_section_relative(got->output_section(),
5533 elfcpp::R_POWERPC_RELATIVE,
5535 object, data_shndx, off,
5536 symobj->toc_base_offset());
5541 case elfcpp::R_PPC64_ADDR64:
5542 case elfcpp::R_PPC64_UADDR64:
5543 case elfcpp::R_POWERPC_ADDR32:
5544 case elfcpp::R_POWERPC_UADDR32:
5545 case elfcpp::R_POWERPC_ADDR24:
5546 case elfcpp::R_POWERPC_ADDR16:
5547 case elfcpp::R_POWERPC_ADDR16_LO:
5548 case elfcpp::R_POWERPC_ADDR16_HI:
5549 case elfcpp::R_POWERPC_ADDR16_HA:
5550 case elfcpp::R_POWERPC_UADDR16:
5551 case elfcpp::R_PPC64_ADDR16_HIGH:
5552 case elfcpp::R_PPC64_ADDR16_HIGHA:
5553 case elfcpp::R_PPC64_ADDR16_HIGHER:
5554 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5555 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5556 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5557 case elfcpp::R_PPC64_ADDR16_DS:
5558 case elfcpp::R_PPC64_ADDR16_LO_DS:
5559 case elfcpp::R_POWERPC_ADDR14:
5560 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5561 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5562 // If building a shared library (or a position-independent
5563 // executable), we need to create a dynamic relocation for
5565 if (parameters->options().output_is_position_independent()
5566 || (size == 64 && is_ifunc && target->abiversion() < 2))
5568 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5570 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5571 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
5572 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
5574 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5575 : elfcpp::R_POWERPC_RELATIVE);
5576 rela_dyn->add_local_relative(object, r_sym, dynrel,
5577 output_section, data_shndx,
5578 reloc.get_r_offset(),
5579 reloc.get_r_addend(), false);
5581 else if (lsym.get_st_type() != elfcpp::STT_SECTION)
5583 check_non_pic(object, r_type);
5584 rela_dyn->add_local(object, r_sym, r_type, output_section,
5585 data_shndx, reloc.get_r_offset(),
5586 reloc.get_r_addend());
5590 gold_assert(lsym.get_st_value() == 0);
5591 unsigned int shndx = lsym.get_st_shndx();
5593 shndx = object->adjust_sym_shndx(r_sym, shndx,
5596 object->error(_("section symbol %u has bad shndx %u"),
5599 rela_dyn->add_local_section(object, shndx, r_type,
5600 output_section, data_shndx,
5601 reloc.get_r_offset());
5606 case elfcpp::R_POWERPC_REL24:
5607 case elfcpp::R_PPC_PLTREL24:
5608 case elfcpp::R_PPC_LOCAL24PC:
5609 case elfcpp::R_POWERPC_REL14:
5610 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5611 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5613 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5614 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5615 reloc.get_r_addend());
5618 case elfcpp::R_PPC64_REL64:
5619 case elfcpp::R_POWERPC_REL32:
5620 case elfcpp::R_POWERPC_REL16:
5621 case elfcpp::R_POWERPC_REL16_LO:
5622 case elfcpp::R_POWERPC_REL16_HI:
5623 case elfcpp::R_POWERPC_REL16_HA:
5624 case elfcpp::R_POWERPC_SECTOFF:
5625 case elfcpp::R_POWERPC_SECTOFF_LO:
5626 case elfcpp::R_POWERPC_SECTOFF_HI:
5627 case elfcpp::R_POWERPC_SECTOFF_HA:
5628 case elfcpp::R_PPC64_SECTOFF_DS:
5629 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5630 case elfcpp::R_POWERPC_TPREL16:
5631 case elfcpp::R_POWERPC_TPREL16_LO:
5632 case elfcpp::R_POWERPC_TPREL16_HI:
5633 case elfcpp::R_POWERPC_TPREL16_HA:
5634 case elfcpp::R_PPC64_TPREL16_DS:
5635 case elfcpp::R_PPC64_TPREL16_LO_DS:
5636 case elfcpp::R_PPC64_TPREL16_HIGH:
5637 case elfcpp::R_PPC64_TPREL16_HIGHA:
5638 case elfcpp::R_PPC64_TPREL16_HIGHER:
5639 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5640 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5641 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5642 case elfcpp::R_POWERPC_DTPREL16:
5643 case elfcpp::R_POWERPC_DTPREL16_LO:
5644 case elfcpp::R_POWERPC_DTPREL16_HI:
5645 case elfcpp::R_POWERPC_DTPREL16_HA:
5646 case elfcpp::R_PPC64_DTPREL16_DS:
5647 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5648 case elfcpp::R_PPC64_DTPREL16_HIGH:
5649 case elfcpp::R_PPC64_DTPREL16_HIGHA:
5650 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5651 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5652 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5653 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5654 case elfcpp::R_PPC64_TLSGD:
5655 case elfcpp::R_PPC64_TLSLD:
5656 case elfcpp::R_PPC64_ADDR64_LOCAL:
5659 case elfcpp::R_POWERPC_GOT16:
5660 case elfcpp::R_POWERPC_GOT16_LO:
5661 case elfcpp::R_POWERPC_GOT16_HI:
5662 case elfcpp::R_POWERPC_GOT16_HA:
5663 case elfcpp::R_PPC64_GOT16_DS:
5664 case elfcpp::R_PPC64_GOT16_LO_DS:
5666 // The symbol requires a GOT entry.
5667 Output_data_got_powerpc<size, big_endian>* got
5668 = target->got_section(symtab, layout);
5669 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5671 if (!parameters->options().output_is_position_independent())
5673 if ((size == 32 && is_ifunc)
5674 || (size == 64 && target->abiversion() >= 2))
5675 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
5677 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
5679 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
5681 // If we are generating a shared object or a pie, this
5682 // symbol's GOT entry will be set by a dynamic relocation.
5684 off = got->add_constant(0);
5685 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
5687 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5689 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5690 : elfcpp::R_POWERPC_RELATIVE);
5691 rela_dyn->add_local_relative(object, r_sym, dynrel,
5692 got, off, 0, false);
5697 case elfcpp::R_PPC64_TOC16:
5698 case elfcpp::R_PPC64_TOC16_LO:
5699 case elfcpp::R_PPC64_TOC16_HI:
5700 case elfcpp::R_PPC64_TOC16_HA:
5701 case elfcpp::R_PPC64_TOC16_DS:
5702 case elfcpp::R_PPC64_TOC16_LO_DS:
5703 // We need a GOT section.
5704 target->got_section(symtab, layout);
5707 case elfcpp::R_POWERPC_GOT_TLSGD16:
5708 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5709 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5710 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5712 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5713 if (tls_type == tls::TLSOPT_NONE)
5715 Output_data_got_powerpc<size, big_endian>* got
5716 = target->got_section(symtab, layout);
5717 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5718 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5719 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
5720 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
5722 else if (tls_type == tls::TLSOPT_TO_LE)
5724 // no GOT relocs needed for Local Exec.
5731 case elfcpp::R_POWERPC_GOT_TLSLD16:
5732 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5733 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5734 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5736 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5737 if (tls_type == tls::TLSOPT_NONE)
5738 target->tlsld_got_offset(symtab, layout, object);
5739 else if (tls_type == tls::TLSOPT_TO_LE)
5741 // no GOT relocs needed for Local Exec.
5742 if (parameters->options().emit_relocs())
5744 Output_section* os = layout->tls_segment()->first_section();
5745 gold_assert(os != NULL);
5746 os->set_needs_symtab_index();
5754 case elfcpp::R_POWERPC_GOT_DTPREL16:
5755 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5756 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5757 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5759 Output_data_got_powerpc<size, big_endian>* got
5760 = target->got_section(symtab, layout);
5761 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5762 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
5766 case elfcpp::R_POWERPC_GOT_TPREL16:
5767 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5768 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5769 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5771 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
5772 if (tls_type == tls::TLSOPT_NONE)
5774 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5775 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
5777 Output_data_got_powerpc<size, big_endian>* got
5778 = target->got_section(symtab, layout);
5779 unsigned int off = got->add_constant(0);
5780 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
5782 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5783 rela_dyn->add_symbolless_local_addend(object, r_sym,
5784 elfcpp::R_POWERPC_TPREL,
5788 else if (tls_type == tls::TLSOPT_TO_LE)
5790 // no GOT relocs needed for Local Exec.
5798 unsupported_reloc_local(object, r_type);
5804 case elfcpp::R_POWERPC_GOT_TLSLD16:
5805 case elfcpp::R_POWERPC_GOT_TLSGD16:
5806 case elfcpp::R_POWERPC_GOT_TPREL16:
5807 case elfcpp::R_POWERPC_GOT_DTPREL16:
5808 case elfcpp::R_POWERPC_GOT16:
5809 case elfcpp::R_PPC64_GOT16_DS:
5810 case elfcpp::R_PPC64_TOC16:
5811 case elfcpp::R_PPC64_TOC16_DS:
5812 ppc_object->set_has_small_toc_reloc();
5818 // Report an unsupported relocation against a global symbol.
5820 template<int size, bool big_endian>
5822 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
5823 Sized_relobj_file<size, big_endian>* object,
5824 unsigned int r_type,
5827 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5828 object->name().c_str(), r_type, gsym->demangled_name().c_str());
5831 // Scan a relocation for a global symbol.
5833 template<int size, bool big_endian>
5835 Target_powerpc<size, big_endian>::Scan::global(
5836 Symbol_table* symtab,
5838 Target_powerpc<size, big_endian>* target,
5839 Sized_relobj_file<size, big_endian>* object,
5840 unsigned int data_shndx,
5841 Output_section* output_section,
5842 const elfcpp::Rela<size, big_endian>& reloc,
5843 unsigned int r_type,
5846 if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP)
5849 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5850 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5852 this->expect_tls_get_addr_call();
5853 const bool final = gsym->final_value_is_known();
5854 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5855 if (tls_type != tls::TLSOPT_NONE)
5856 this->skip_next_tls_get_addr_call();
5858 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5859 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5861 this->expect_tls_get_addr_call();
5862 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5863 if (tls_type != tls::TLSOPT_NONE)
5864 this->skip_next_tls_get_addr_call();
5867 Powerpc_relobj<size, big_endian>* ppc_object
5868 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5870 // A STT_GNU_IFUNC symbol may require a PLT entry.
5871 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
5872 bool pushed_ifunc = false;
5873 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5875 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5876 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5877 reloc.get_r_addend());
5878 target->make_plt_entry(symtab, layout, gsym);
5879 pushed_ifunc = true;
5884 case elfcpp::R_POWERPC_NONE:
5885 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5886 case elfcpp::R_POWERPC_GNU_VTENTRY:
5887 case elfcpp::R_PPC_LOCAL24PC:
5888 case elfcpp::R_POWERPC_TLS:
5891 case elfcpp::R_PPC64_TOC:
5893 Output_data_got_powerpc<size, big_endian>* got
5894 = target->got_section(symtab, layout);
5895 if (parameters->options().output_is_position_independent())
5897 Address off = reloc.get_r_offset();
5899 && data_shndx == ppc_object->opd_shndx()
5900 && ppc_object->get_opd_discard(off - 8))
5903 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5904 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5905 if (data_shndx != ppc_object->opd_shndx())
5906 symobj = static_cast
5907 <Powerpc_relobj<size, big_endian>*>(gsym->object());
5908 rela_dyn->add_output_section_relative(got->output_section(),
5909 elfcpp::R_POWERPC_RELATIVE,
5911 object, data_shndx, off,
5912 symobj->toc_base_offset());
5917 case elfcpp::R_PPC64_ADDR64:
5919 && target->abiversion() < 2
5920 && data_shndx == ppc_object->opd_shndx()
5921 && (gsym->is_defined_in_discarded_section()
5922 || gsym->object() != object))
5924 ppc_object->set_opd_discard(reloc.get_r_offset());
5928 case elfcpp::R_PPC64_UADDR64:
5929 case elfcpp::R_POWERPC_ADDR32:
5930 case elfcpp::R_POWERPC_UADDR32:
5931 case elfcpp::R_POWERPC_ADDR24:
5932 case elfcpp::R_POWERPC_ADDR16:
5933 case elfcpp::R_POWERPC_ADDR16_LO:
5934 case elfcpp::R_POWERPC_ADDR16_HI:
5935 case elfcpp::R_POWERPC_ADDR16_HA:
5936 case elfcpp::R_POWERPC_UADDR16:
5937 case elfcpp::R_PPC64_ADDR16_HIGH:
5938 case elfcpp::R_PPC64_ADDR16_HIGHA:
5939 case elfcpp::R_PPC64_ADDR16_HIGHER:
5940 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5941 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5942 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5943 case elfcpp::R_PPC64_ADDR16_DS:
5944 case elfcpp::R_PPC64_ADDR16_LO_DS:
5945 case elfcpp::R_POWERPC_ADDR14:
5946 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5947 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5949 // Make a PLT entry if necessary.
5950 if (gsym->needs_plt_entry())
5952 // Since this is not a PC-relative relocation, we may be
5953 // taking the address of a function. In that case we need to
5954 // set the entry in the dynamic symbol table to the address of
5955 // the PLT call stub.
5956 bool need_ifunc_plt = false;
5957 if ((size == 32 || target->abiversion() >= 2)
5958 && gsym->is_from_dynobj()
5959 && !parameters->options().output_is_position_independent())
5961 gsym->set_needs_dynsym_value();
5962 need_ifunc_plt = true;
5964 if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt))
5966 target->push_branch(ppc_object, data_shndx,
5967 reloc.get_r_offset(), r_type,
5968 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5969 reloc.get_r_addend());
5970 target->make_plt_entry(symtab, layout, gsym);
5973 // Make a dynamic relocation if necessary.
5974 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))
5975 || (size == 64 && is_ifunc && target->abiversion() < 2))
5977 if (!parameters->options().output_is_position_independent()
5978 && gsym->may_need_copy_reloc())
5980 target->copy_reloc(symtab, layout, object,
5981 data_shndx, output_section, gsym, reloc);
5983 else if ((((size == 32
5984 && r_type == elfcpp::R_POWERPC_ADDR32)
5986 && r_type == elfcpp::R_PPC64_ADDR64
5987 && target->abiversion() >= 2))
5988 && gsym->can_use_relative_reloc(false)
5989 && !(gsym->visibility() == elfcpp::STV_PROTECTED
5990 && parameters->options().shared()))
5992 && r_type == elfcpp::R_PPC64_ADDR64
5993 && target->abiversion() < 2
5994 && (gsym->can_use_relative_reloc(false)
5995 || data_shndx == ppc_object->opd_shndx())))
5997 Reloc_section* rela_dyn
5998 = target->rela_dyn_section(symtab, layout, is_ifunc);
5999 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6000 : elfcpp::R_POWERPC_RELATIVE);
6001 rela_dyn->add_symbolless_global_addend(
6002 gsym, dynrel, output_section, object, data_shndx,
6003 reloc.get_r_offset(), reloc.get_r_addend());
6007 Reloc_section* rela_dyn
6008 = target->rela_dyn_section(symtab, layout, is_ifunc);
6009 check_non_pic(object, r_type);
6010 rela_dyn->add_global(gsym, r_type, output_section,
6012 reloc.get_r_offset(),
6013 reloc.get_r_addend());
6019 case elfcpp::R_PPC_PLTREL24:
6020 case elfcpp::R_POWERPC_REL24:
6023 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6025 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6026 reloc.get_r_addend());
6027 if (gsym->needs_plt_entry()
6028 || (!gsym->final_value_is_known()
6029 && (gsym->is_undefined()
6030 || gsym->is_from_dynobj()
6031 || gsym->is_preemptible())))
6032 target->make_plt_entry(symtab, layout, gsym);
6036 case elfcpp::R_PPC64_REL64:
6037 case elfcpp::R_POWERPC_REL32:
6038 // Make a dynamic relocation if necessary.
6039 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)))
6041 if (!parameters->options().output_is_position_independent()
6042 && gsym->may_need_copy_reloc())
6044 target->copy_reloc(symtab, layout, object,
6045 data_shndx, output_section, gsym,
6050 Reloc_section* rela_dyn
6051 = target->rela_dyn_section(symtab, layout, is_ifunc);
6052 check_non_pic(object, r_type);
6053 rela_dyn->add_global(gsym, r_type, output_section, object,
6054 data_shndx, reloc.get_r_offset(),
6055 reloc.get_r_addend());
6060 case elfcpp::R_POWERPC_REL14:
6061 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6062 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6064 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6065 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6066 reloc.get_r_addend());
6069 case elfcpp::R_POWERPC_REL16:
6070 case elfcpp::R_POWERPC_REL16_LO:
6071 case elfcpp::R_POWERPC_REL16_HI:
6072 case elfcpp::R_POWERPC_REL16_HA:
6073 case elfcpp::R_POWERPC_SECTOFF:
6074 case elfcpp::R_POWERPC_SECTOFF_LO:
6075 case elfcpp::R_POWERPC_SECTOFF_HI:
6076 case elfcpp::R_POWERPC_SECTOFF_HA:
6077 case elfcpp::R_PPC64_SECTOFF_DS:
6078 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6079 case elfcpp::R_POWERPC_TPREL16:
6080 case elfcpp::R_POWERPC_TPREL16_LO:
6081 case elfcpp::R_POWERPC_TPREL16_HI:
6082 case elfcpp::R_POWERPC_TPREL16_HA:
6083 case elfcpp::R_PPC64_TPREL16_DS:
6084 case elfcpp::R_PPC64_TPREL16_LO_DS:
6085 case elfcpp::R_PPC64_TPREL16_HIGH:
6086 case elfcpp::R_PPC64_TPREL16_HIGHA:
6087 case elfcpp::R_PPC64_TPREL16_HIGHER:
6088 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6089 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6090 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6091 case elfcpp::R_POWERPC_DTPREL16:
6092 case elfcpp::R_POWERPC_DTPREL16_LO:
6093 case elfcpp::R_POWERPC_DTPREL16_HI:
6094 case elfcpp::R_POWERPC_DTPREL16_HA:
6095 case elfcpp::R_PPC64_DTPREL16_DS:
6096 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6097 case elfcpp::R_PPC64_DTPREL16_HIGH:
6098 case elfcpp::R_PPC64_DTPREL16_HIGHA:
6099 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6100 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6101 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6102 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6103 case elfcpp::R_PPC64_TLSGD:
6104 case elfcpp::R_PPC64_TLSLD:
6105 case elfcpp::R_PPC64_ADDR64_LOCAL:
6108 case elfcpp::R_POWERPC_GOT16:
6109 case elfcpp::R_POWERPC_GOT16_LO:
6110 case elfcpp::R_POWERPC_GOT16_HI:
6111 case elfcpp::R_POWERPC_GOT16_HA:
6112 case elfcpp::R_PPC64_GOT16_DS:
6113 case elfcpp::R_PPC64_GOT16_LO_DS:
6115 // The symbol requires a GOT entry.
6116 Output_data_got_powerpc<size, big_endian>* got;
6118 got = target->got_section(symtab, layout);
6119 if (gsym->final_value_is_known())
6121 if ((size == 32 && is_ifunc)
6122 || (size == 64 && target->abiversion() >= 2))
6123 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
6125 got->add_global(gsym, GOT_TYPE_STANDARD);
6127 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
6129 // If we are generating a shared object or a pie, this
6130 // symbol's GOT entry will be set by a dynamic relocation.
6131 unsigned int off = got->add_constant(0);
6132 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
6134 Reloc_section* rela_dyn
6135 = target->rela_dyn_section(symtab, layout, is_ifunc);
6137 if (gsym->can_use_relative_reloc(false)
6139 || target->abiversion() >= 2)
6140 && gsym->visibility() == elfcpp::STV_PROTECTED
6141 && parameters->options().shared()))
6143 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6144 : elfcpp::R_POWERPC_RELATIVE);
6145 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
6149 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
6150 rela_dyn->add_global(gsym, dynrel, got, off, 0);
6156 case elfcpp::R_PPC64_TOC16:
6157 case elfcpp::R_PPC64_TOC16_LO:
6158 case elfcpp::R_PPC64_TOC16_HI:
6159 case elfcpp::R_PPC64_TOC16_HA:
6160 case elfcpp::R_PPC64_TOC16_DS:
6161 case elfcpp::R_PPC64_TOC16_LO_DS:
6162 // We need a GOT section.
6163 target->got_section(symtab, layout);
6166 case elfcpp::R_POWERPC_GOT_TLSGD16:
6167 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6168 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6169 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6171 const bool final = gsym->final_value_is_known();
6172 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6173 if (tls_type == tls::TLSOPT_NONE)
6175 Output_data_got_powerpc<size, big_endian>* got
6176 = target->got_section(symtab, layout);
6177 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6178 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn,
6179 elfcpp::R_POWERPC_DTPMOD,
6180 elfcpp::R_POWERPC_DTPREL);
6182 else if (tls_type == tls::TLSOPT_TO_IE)
6184 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6186 Output_data_got_powerpc<size, big_endian>* got
6187 = target->got_section(symtab, layout);
6188 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6189 if (gsym->is_undefined()
6190 || gsym->is_from_dynobj())
6192 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6193 elfcpp::R_POWERPC_TPREL);
6197 unsigned int off = got->add_constant(0);
6198 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6199 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6200 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6205 else if (tls_type == tls::TLSOPT_TO_LE)
6207 // no GOT relocs needed for Local Exec.
6214 case elfcpp::R_POWERPC_GOT_TLSLD16:
6215 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6216 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6217 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6219 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6220 if (tls_type == tls::TLSOPT_NONE)
6221 target->tlsld_got_offset(symtab, layout, object);
6222 else if (tls_type == tls::TLSOPT_TO_LE)
6224 // no GOT relocs needed for Local Exec.
6225 if (parameters->options().emit_relocs())
6227 Output_section* os = layout->tls_segment()->first_section();
6228 gold_assert(os != NULL);
6229 os->set_needs_symtab_index();
6237 case elfcpp::R_POWERPC_GOT_DTPREL16:
6238 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6239 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6240 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6242 Output_data_got_powerpc<size, big_endian>* got
6243 = target->got_section(symtab, layout);
6244 if (!gsym->final_value_is_known()
6245 && (gsym->is_from_dynobj()
6246 || gsym->is_undefined()
6247 || gsym->is_preemptible()))
6248 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
6249 target->rela_dyn_section(layout),
6250 elfcpp::R_POWERPC_DTPREL);
6252 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
6256 case elfcpp::R_POWERPC_GOT_TPREL16:
6257 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6258 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6259 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6261 const bool final = gsym->final_value_is_known();
6262 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6263 if (tls_type == tls::TLSOPT_NONE)
6265 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6267 Output_data_got_powerpc<size, big_endian>* got
6268 = target->got_section(symtab, layout);
6269 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6270 if (gsym->is_undefined()
6271 || gsym->is_from_dynobj())
6273 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6274 elfcpp::R_POWERPC_TPREL);
6278 unsigned int off = got->add_constant(0);
6279 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6280 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6281 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6286 else if (tls_type == tls::TLSOPT_TO_LE)
6288 // no GOT relocs needed for Local Exec.
6296 unsupported_reloc_global(object, r_type, gsym);
6302 case elfcpp::R_POWERPC_GOT_TLSLD16:
6303 case elfcpp::R_POWERPC_GOT_TLSGD16:
6304 case elfcpp::R_POWERPC_GOT_TPREL16:
6305 case elfcpp::R_POWERPC_GOT_DTPREL16:
6306 case elfcpp::R_POWERPC_GOT16:
6307 case elfcpp::R_PPC64_GOT16_DS:
6308 case elfcpp::R_PPC64_TOC16:
6309 case elfcpp::R_PPC64_TOC16_DS:
6310 ppc_object->set_has_small_toc_reloc();
6316 // Process relocations for gc.
6318 template<int size, bool big_endian>
6320 Target_powerpc<size, big_endian>::gc_process_relocs(
6321 Symbol_table* symtab,
6323 Sized_relobj_file<size, big_endian>* object,
6324 unsigned int data_shndx,
6326 const unsigned char* prelocs,
6328 Output_section* output_section,
6329 bool needs_special_offset_handling,
6330 size_t local_symbol_count,
6331 const unsigned char* plocal_symbols)
6333 typedef Target_powerpc<size, big_endian> Powerpc;
6334 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6335 Powerpc_relobj<size, big_endian>* ppc_object
6336 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
6338 ppc_object->set_opd_valid();
6339 if (size == 64 && data_shndx == ppc_object->opd_shndx())
6341 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
6342 for (p = ppc_object->access_from_map()->begin();
6343 p != ppc_object->access_from_map()->end();
6346 Address dst_off = p->first;
6347 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6348 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
6349 for (s = p->second.begin(); s != p->second.end(); ++s)
6351 Object* src_obj = s->first;
6352 unsigned int src_indx = s->second;
6353 symtab->gc()->add_reference(src_obj, src_indx,
6354 ppc_object, dst_indx);
6358 ppc_object->access_from_map()->clear();
6359 ppc_object->process_gc_mark(symtab);
6360 // Don't look at .opd relocs as .opd will reference everything.
6364 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
6365 typename Target_powerpc::Relocatable_size_for_reloc>(
6374 needs_special_offset_handling,
6379 // Handle target specific gc actions when adding a gc reference from
6380 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6381 // and DST_OFF. For powerpc64, this adds a referenc to the code
6382 // section of a function descriptor.
6384 template<int size, bool big_endian>
6386 Target_powerpc<size, big_endian>::do_gc_add_reference(
6387 Symbol_table* symtab,
6389 unsigned int src_shndx,
6391 unsigned int dst_shndx,
6392 Address dst_off) const
6394 if (size != 64 || dst_obj->is_dynamic())
6397 Powerpc_relobj<size, big_endian>* ppc_object
6398 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
6399 if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
6401 if (ppc_object->opd_valid())
6403 dst_shndx = ppc_object->get_opd_ent(dst_off);
6404 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
6408 // If we haven't run scan_opd_relocs, we must delay
6409 // processing this function descriptor reference.
6410 ppc_object->add_reference(src_obj, src_shndx, dst_off);
6415 // Add any special sections for this symbol to the gc work list.
6416 // For powerpc64, this adds the code section of a function
6419 template<int size, bool big_endian>
6421 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
6422 Symbol_table* symtab,
6427 Powerpc_relobj<size, big_endian>* ppc_object
6428 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
6430 unsigned int shndx = sym->shndx(&is_ordinary);
6431 if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
6433 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
6434 Address dst_off = gsym->value();
6435 if (ppc_object->opd_valid())
6437 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6438 symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx));
6441 ppc_object->add_gc_mark(dst_off);
6446 // For a symbol location in .opd, set LOC to the location of the
6449 template<int size, bool big_endian>
6451 Target_powerpc<size, big_endian>::do_function_location(
6452 Symbol_location* loc) const
6454 if (size == 64 && loc->shndx != 0)
6456 if (loc->object->is_dynamic())
6458 Powerpc_dynobj<size, big_endian>* ppc_object
6459 = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
6460 if (loc->shndx == ppc_object->opd_shndx())
6463 Address off = loc->offset - ppc_object->opd_address();
6464 loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
6465 loc->offset = dest_off;
6470 const Powerpc_relobj<size, big_endian>* ppc_object
6471 = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
6472 if (loc->shndx == ppc_object->opd_shndx())
6475 loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
6476 loc->offset = dest_off;
6482 // Scan relocations for a section.
6484 template<int size, bool big_endian>
6486 Target_powerpc<size, big_endian>::scan_relocs(
6487 Symbol_table* symtab,
6489 Sized_relobj_file<size, big_endian>* object,
6490 unsigned int data_shndx,
6491 unsigned int sh_type,
6492 const unsigned char* prelocs,
6494 Output_section* output_section,
6495 bool needs_special_offset_handling,
6496 size_t local_symbol_count,
6497 const unsigned char* plocal_symbols)
6499 typedef Target_powerpc<size, big_endian> Powerpc;
6500 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6502 if (sh_type == elfcpp::SHT_REL)
6504 gold_error(_("%s: unsupported REL reloc section"),
6505 object->name().c_str());
6509 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
6518 needs_special_offset_handling,
6523 // Functor class for processing the global symbol table.
6524 // Removes symbols defined on discarded opd entries.
6526 template<bool big_endian>
6527 class Global_symbol_visitor_opd
6530 Global_symbol_visitor_opd()
6534 operator()(Sized_symbol<64>* sym)
6536 if (sym->has_symtab_index()
6537 || sym->source() != Symbol::FROM_OBJECT
6538 || !sym->in_real_elf())
6541 if (sym->object()->is_dynamic())
6544 Powerpc_relobj<64, big_endian>* symobj
6545 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
6546 if (symobj->opd_shndx() == 0)
6550 unsigned int shndx = sym->shndx(&is_ordinary);
6551 if (shndx == symobj->opd_shndx()
6552 && symobj->get_opd_discard(sym->value()))
6554 sym->set_undefined();
6555 sym->set_is_defined_in_discarded_section();
6556 sym->set_symtab_index(-1U);
6561 template<int size, bool big_endian>
6563 Target_powerpc<size, big_endian>::define_save_restore_funcs(
6565 Symbol_table* symtab)
6569 Output_data_save_res<64, big_endian>* savres
6570 = new Output_data_save_res<64, big_endian>(symtab);
6571 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
6572 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
6573 savres, ORDER_TEXT, false);
6577 // Sort linker created .got section first (for the header), then input
6578 // sections belonging to files using small model code.
6580 template<bool big_endian>
6581 class Sort_toc_sections
6585 operator()(const Output_section::Input_section& is1,
6586 const Output_section::Input_section& is2) const
6588 if (!is1.is_input_section() && is2.is_input_section())
6591 = (is1.is_input_section()
6592 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
6593 ->has_small_toc_reloc()));
6595 = (is2.is_input_section()
6596 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
6597 ->has_small_toc_reloc()));
6598 return small1 && !small2;
6602 // Finalize the sections.
6604 template<int size, bool big_endian>
6606 Target_powerpc<size, big_endian>::do_finalize_sections(
6608 const Input_objects*,
6609 Symbol_table* symtab)
6611 if (parameters->doing_static_link())
6613 // At least some versions of glibc elf-init.o have a strong
6614 // reference to __rela_iplt marker syms. A weak ref would be
6616 if (this->iplt_ != NULL)
6618 Reloc_section* rel = this->iplt_->rel_plt();
6619 symtab->define_in_output_data("__rela_iplt_start", NULL,
6620 Symbol_table::PREDEFINED, rel, 0, 0,
6621 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6622 elfcpp::STV_HIDDEN, 0, false, true);
6623 symtab->define_in_output_data("__rela_iplt_end", NULL,
6624 Symbol_table::PREDEFINED, rel, 0, 0,
6625 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6626 elfcpp::STV_HIDDEN, 0, true, true);
6630 symtab->define_as_constant("__rela_iplt_start", NULL,
6631 Symbol_table::PREDEFINED, 0, 0,
6632 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6633 elfcpp::STV_HIDDEN, 0, true, false);
6634 symtab->define_as_constant("__rela_iplt_end", NULL,
6635 Symbol_table::PREDEFINED, 0, 0,
6636 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6637 elfcpp::STV_HIDDEN, 0, true, false);
6643 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
6644 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
6646 if (!parameters->options().relocatable())
6648 this->define_save_restore_funcs(layout, symtab);
6650 // Annoyingly, we need to make these sections now whether or
6651 // not we need them. If we delay until do_relax then we
6652 // need to mess with the relaxation machinery checkpointing.
6653 this->got_section(symtab, layout);
6654 this->make_brlt_section(layout);
6656 if (parameters->options().toc_sort())
6658 Output_section* os = this->got_->output_section();
6659 if (os != NULL && os->input_sections().size() > 1)
6660 std::stable_sort(os->input_sections().begin(),
6661 os->input_sections().end(),
6662 Sort_toc_sections<big_endian>());
6667 // Fill in some more dynamic tags.
6668 Output_data_dynamic* odyn = layout->dynamic_data();
6671 const Reloc_section* rel_plt = (this->plt_ == NULL
6673 : this->plt_->rel_plt());
6674 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
6675 this->rela_dyn_, true, size == 32);
6679 if (this->got_ != NULL)
6681 this->got_->finalize_data_size();
6682 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
6683 this->got_, this->got_->g_o_t());
6688 if (this->glink_ != NULL)
6690 this->glink_->finalize_data_size();
6691 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
6693 (this->glink_->pltresolve_size
6699 // Emit any relocs we saved in an attempt to avoid generating COPY
6701 if (this->copy_relocs_.any_saved_relocs())
6702 this->copy_relocs_.emit(this->rela_dyn_section(layout));
6705 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6709 ok_lo_toc_insn(uint32_t insn)
6711 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6712 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6713 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6714 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6715 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6716 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6717 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6718 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6719 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6720 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6721 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6722 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6723 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6724 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6725 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6727 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6728 && ((insn & 3) == 0 || (insn & 3) == 3))
6729 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
6732 // Return the value to use for a branch relocation.
6734 template<int size, bool big_endian>
6736 Target_powerpc<size, big_endian>::symval_for_branch(
6737 const Symbol_table* symtab,
6738 const Sized_symbol<size>* gsym,
6739 Powerpc_relobj<size, big_endian>* object,
6741 unsigned int *dest_shndx)
6743 if (size == 32 || this->abiversion() >= 2)
6747 // If the symbol is defined in an opd section, ie. is a function
6748 // descriptor, use the function descriptor code entry address
6749 Powerpc_relobj<size, big_endian>* symobj = object;
6751 && gsym->source() != Symbol::FROM_OBJECT)
6754 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
6755 unsigned int shndx = symobj->opd_shndx();
6758 Address opd_addr = symobj->get_output_section_offset(shndx);
6759 if (opd_addr == invalid_address)
6761 opd_addr += symobj->output_section_address(shndx);
6762 if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx))
6765 *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off);
6766 if (symtab->is_section_folded(symobj, *dest_shndx))
6769 = symtab->icf()->get_folded_section(symobj, *dest_shndx);
6770 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
6771 *dest_shndx = folded.second;
6773 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
6774 if (sec_addr == invalid_address)
6777 sec_addr += symobj->output_section(*dest_shndx)->address();
6778 *value = sec_addr + sec_off;
6783 // Perform a relocation.
6785 template<int size, bool big_endian>
6787 Target_powerpc<size, big_endian>::Relocate::relocate(
6788 const Relocate_info<size, big_endian>* relinfo,
6789 Target_powerpc* target,
6792 const elfcpp::Rela<size, big_endian>& rela,
6793 unsigned int r_type,
6794 const Sized_symbol<size>* gsym,
6795 const Symbol_value<size>* psymval,
6796 unsigned char* view,
6798 section_size_type view_size)
6803 switch (this->maybe_skip_tls_get_addr_call(r_type, gsym))
6805 case Track_tls::NOT_EXPECTED:
6806 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6807 _("__tls_get_addr call lacks marker reloc"));
6809 case Track_tls::EXPECTED:
6810 // We have already complained.
6812 case Track_tls::SKIP:
6814 case Track_tls::NORMAL:
6818 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
6819 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
6820 Powerpc_relobj<size, big_endian>* const object
6821 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
6823 bool has_stub_value = false;
6824 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6826 ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
6827 : object->local_has_plt_offset(r_sym))
6828 && (!psymval->is_ifunc_symbol()
6829 || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false)))
6833 && target->abiversion() >= 2
6834 && !parameters->options().output_is_position_independent()
6835 && !is_branch_reloc(r_type))
6837 unsigned int off = target->glink_section()->find_global_entry(gsym);
6838 gold_assert(off != (unsigned int)-1);
6839 value = target->glink_section()->global_entry_address() + off;
6843 Stub_table<size, big_endian>* stub_table
6844 = object->stub_table(relinfo->data_shndx);
6845 if (stub_table == NULL)
6847 // This is a ref from a data section to an ifunc symbol.
6848 if (target->stub_tables().size() != 0)
6849 stub_table = target->stub_tables()[0];
6851 gold_assert(stub_table != NULL);
6854 off = stub_table->find_plt_call_entry(object, gsym, r_type,
6855 rela.get_r_addend());
6857 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
6858 rela.get_r_addend());
6859 gold_assert(off != invalid_address);
6860 value = stub_table->stub_address() + off;
6862 has_stub_value = true;
6865 if (r_type == elfcpp::R_POWERPC_GOT16
6866 || r_type == elfcpp::R_POWERPC_GOT16_LO
6867 || r_type == elfcpp::R_POWERPC_GOT16_HI
6868 || r_type == elfcpp::R_POWERPC_GOT16_HA
6869 || r_type == elfcpp::R_PPC64_GOT16_DS
6870 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
6874 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
6875 value = gsym->got_offset(GOT_TYPE_STANDARD);
6879 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6880 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
6881 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
6883 value -= target->got_section()->got_base_offset(object);
6885 else if (r_type == elfcpp::R_PPC64_TOC)
6887 value = (target->got_section()->output_section()->address()
6888 + object->toc_base_offset());
6890 else if (gsym != NULL
6891 && (r_type == elfcpp::R_POWERPC_REL24
6892 || r_type == elfcpp::R_PPC_PLTREL24)
6897 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
6898 Valtype* wv = reinterpret_cast<Valtype*>(view);
6899 bool can_plt_call = false;
6900 if (rela.get_r_offset() + 8 <= view_size)
6902 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
6903 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
6906 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
6908 elfcpp::Swap<32, big_endian>::
6909 writeval(wv + 1, ld_2_1 + target->stk_toc());
6910 can_plt_call = true;
6915 // If we don't have a branch and link followed by a nop,
6916 // we can't go via the plt because there is no place to
6917 // put a toc restoring instruction.
6918 // Unless we know we won't be returning.
6919 if (strcmp(gsym->name(), "__libc_start_main") == 0)
6920 can_plt_call = true;
6924 // g++ as of 20130507 emits self-calls without a
6925 // following nop. This is arguably wrong since we have
6926 // conflicting information. On the one hand a global
6927 // symbol and on the other a local call sequence, but
6928 // don't error for this special case.
6929 // It isn't possible to cheaply verify we have exactly
6930 // such a call. Allow all calls to the same section.
6932 Address code = value;
6933 if (gsym->source() == Symbol::FROM_OBJECT
6934 && gsym->object() == object)
6936 unsigned int dest_shndx = 0;
6937 if (target->abiversion() < 2)
6939 Address addend = rela.get_r_addend();
6940 code = psymval->value(object, addend);
6941 target->symval_for_branch(relinfo->symtab, gsym, object,
6942 &code, &dest_shndx);
6945 if (dest_shndx == 0)
6946 dest_shndx = gsym->shndx(&is_ordinary);
6947 ok = dest_shndx == relinfo->data_shndx;
6951 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6952 _("call lacks nop, can't restore toc; "
6953 "recompile with -fPIC"));
6959 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6960 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
6961 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
6962 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
6964 // First instruction of a global dynamic sequence, arg setup insn.
6965 const bool final = gsym == NULL || gsym->final_value_is_known();
6966 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6967 enum Got_type got_type = GOT_TYPE_STANDARD;
6968 if (tls_type == tls::TLSOPT_NONE)
6969 got_type = GOT_TYPE_TLSGD;
6970 else if (tls_type == tls::TLSOPT_TO_IE)
6971 got_type = GOT_TYPE_TPREL;
6972 if (got_type != GOT_TYPE_STANDARD)
6976 gold_assert(gsym->has_got_offset(got_type));
6977 value = gsym->got_offset(got_type);
6981 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6982 gold_assert(object->local_has_got_offset(r_sym, got_type));
6983 value = object->local_got_offset(r_sym, got_type);
6985 value -= target->got_section()->got_base_offset(object);
6987 if (tls_type == tls::TLSOPT_TO_IE)
6989 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6990 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
6992 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6993 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6994 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
6996 insn |= 32 << 26; // lwz
6998 insn |= 58 << 26; // ld
6999 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7001 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
7002 - elfcpp::R_POWERPC_GOT_TLSGD16);
7004 else if (tls_type == tls::TLSOPT_TO_LE)
7006 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7007 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7009 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7010 Insn insn = addis_3_13;
7013 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7014 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7015 value = psymval->value(object, rela.get_r_addend());
7019 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7021 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7022 r_type = elfcpp::R_POWERPC_NONE;
7026 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7027 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
7028 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
7029 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
7031 // First instruction of a local dynamic sequence, arg setup insn.
7032 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7033 if (tls_type == tls::TLSOPT_NONE)
7035 value = target->tlsld_got_offset();
7036 value -= target->got_section()->got_base_offset(object);
7040 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7041 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7042 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
7044 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7045 Insn insn = addis_3_13;
7048 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7049 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7054 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7056 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7057 r_type = elfcpp::R_POWERPC_NONE;
7061 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
7062 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
7063 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
7064 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
7066 // Accesses relative to a local dynamic sequence address,
7067 // no optimisation here.
7070 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
7071 value = gsym->got_offset(GOT_TYPE_DTPREL);
7075 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7076 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
7077 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
7079 value -= target->got_section()->got_base_offset(object);
7081 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7082 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
7083 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
7084 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
7086 // First instruction of initial exec sequence.
7087 const bool final = gsym == NULL || gsym->final_value_is_known();
7088 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7089 if (tls_type == tls::TLSOPT_NONE)
7093 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
7094 value = gsym->got_offset(GOT_TYPE_TPREL);
7098 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7099 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
7100 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
7102 value -= target->got_section()->got_base_offset(object);
7106 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7107 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7108 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
7110 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7111 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7112 insn &= (1 << 26) - (1 << 21); // extract rt from ld
7117 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7118 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7119 value = psymval->value(object, rela.get_r_addend());
7123 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7125 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7126 r_type = elfcpp::R_POWERPC_NONE;
7130 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
7131 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
7133 // Second instruction of a global dynamic sequence,
7134 // the __tls_get_addr call
7135 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7136 const bool final = gsym == NULL || gsym->final_value_is_known();
7137 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7138 if (tls_type != tls::TLSOPT_NONE)
7140 if (tls_type == tls::TLSOPT_TO_IE)
7142 Insn* iview = reinterpret_cast<Insn*>(view);
7143 Insn insn = add_3_3_13;
7146 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7147 r_type = elfcpp::R_POWERPC_NONE;
7151 Insn* iview = reinterpret_cast<Insn*>(view);
7152 Insn insn = addi_3_3;
7153 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7154 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7155 view += 2 * big_endian;
7156 value = psymval->value(object, rela.get_r_addend());
7158 this->skip_next_tls_get_addr_call();
7161 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
7162 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
7164 // Second instruction of a local dynamic sequence,
7165 // the __tls_get_addr call
7166 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7167 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7168 if (tls_type == tls::TLSOPT_TO_LE)
7170 Insn* iview = reinterpret_cast<Insn*>(view);
7171 Insn insn = addi_3_3;
7172 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7173 this->skip_next_tls_get_addr_call();
7174 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7175 view += 2 * big_endian;
7179 else if (r_type == elfcpp::R_POWERPC_TLS)
7181 // Second instruction of an initial exec sequence
7182 const bool final = gsym == NULL || gsym->final_value_is_known();
7183 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7184 if (tls_type == tls::TLSOPT_TO_LE)
7186 Insn* iview = reinterpret_cast<Insn*>(view);
7187 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7188 unsigned int reg = size == 32 ? 2 : 13;
7189 insn = at_tls_transform(insn, reg);
7190 gold_assert(insn != 0);
7191 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7192 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7193 view += 2 * big_endian;
7194 value = psymval->value(object, rela.get_r_addend());
7197 else if (!has_stub_value)
7200 if (r_type != elfcpp::R_PPC_PLTREL24)
7201 addend = rela.get_r_addend();
7202 value = psymval->value(object, addend);
7203 if (size == 64 && is_branch_reloc(r_type))
7205 if (target->abiversion() >= 2)
7208 value += object->ppc64_local_entry_offset(gsym);
7210 value += object->ppc64_local_entry_offset(r_sym);
7214 unsigned int dest_shndx;
7215 target->symval_for_branch(relinfo->symtab, gsym, object,
7216 &value, &dest_shndx);
7219 unsigned long max_branch_offset = max_branch_delta(r_type);
7220 if (max_branch_offset != 0
7221 && value - address + max_branch_offset >= 2 * max_branch_offset)
7223 Stub_table<size, big_endian>* stub_table
7224 = object->stub_table(relinfo->data_shndx);
7225 if (stub_table != NULL)
7227 Address off = stub_table->find_long_branch_entry(object, value);
7228 if (off != invalid_address)
7230 value = (stub_table->stub_address() + stub_table->plt_size()
7232 has_stub_value = true;
7240 case elfcpp::R_PPC64_REL64:
7241 case elfcpp::R_POWERPC_REL32:
7242 case elfcpp::R_POWERPC_REL24:
7243 case elfcpp::R_PPC_PLTREL24:
7244 case elfcpp::R_PPC_LOCAL24PC:
7245 case elfcpp::R_POWERPC_REL16:
7246 case elfcpp::R_POWERPC_REL16_LO:
7247 case elfcpp::R_POWERPC_REL16_HI:
7248 case elfcpp::R_POWERPC_REL16_HA:
7249 case elfcpp::R_POWERPC_REL14:
7250 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7251 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7255 case elfcpp::R_PPC64_TOC16:
7256 case elfcpp::R_PPC64_TOC16_LO:
7257 case elfcpp::R_PPC64_TOC16_HI:
7258 case elfcpp::R_PPC64_TOC16_HA:
7259 case elfcpp::R_PPC64_TOC16_DS:
7260 case elfcpp::R_PPC64_TOC16_LO_DS:
7261 // Subtract the TOC base address.
7262 value -= (target->got_section()->output_section()->address()
7263 + object->toc_base_offset());
7266 case elfcpp::R_POWERPC_SECTOFF:
7267 case elfcpp::R_POWERPC_SECTOFF_LO:
7268 case elfcpp::R_POWERPC_SECTOFF_HI:
7269 case elfcpp::R_POWERPC_SECTOFF_HA:
7270 case elfcpp::R_PPC64_SECTOFF_DS:
7271 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7273 value -= os->address();
7276 case elfcpp::R_PPC64_TPREL16_DS:
7277 case elfcpp::R_PPC64_TPREL16_LO_DS:
7278 case elfcpp::R_PPC64_TPREL16_HIGH:
7279 case elfcpp::R_PPC64_TPREL16_HIGHA:
7281 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7283 case elfcpp::R_POWERPC_TPREL16:
7284 case elfcpp::R_POWERPC_TPREL16_LO:
7285 case elfcpp::R_POWERPC_TPREL16_HI:
7286 case elfcpp::R_POWERPC_TPREL16_HA:
7287 case elfcpp::R_POWERPC_TPREL:
7288 case elfcpp::R_PPC64_TPREL16_HIGHER:
7289 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7290 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7291 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7292 // tls symbol values are relative to tls_segment()->vaddr()
7296 case elfcpp::R_PPC64_DTPREL16_DS:
7297 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7298 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7299 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7300 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7301 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7303 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7304 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7306 case elfcpp::R_POWERPC_DTPREL16:
7307 case elfcpp::R_POWERPC_DTPREL16_LO:
7308 case elfcpp::R_POWERPC_DTPREL16_HI:
7309 case elfcpp::R_POWERPC_DTPREL16_HA:
7310 case elfcpp::R_POWERPC_DTPREL:
7311 case elfcpp::R_PPC64_DTPREL16_HIGH:
7312 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7313 // tls symbol values are relative to tls_segment()->vaddr()
7314 value -= dtp_offset;
7317 case elfcpp::R_PPC64_ADDR64_LOCAL:
7319 value += object->ppc64_local_entry_offset(gsym);
7321 value += object->ppc64_local_entry_offset(r_sym);
7328 Insn branch_bit = 0;
7331 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7332 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7333 branch_bit = 1 << 21;
7334 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7335 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7337 Insn* iview = reinterpret_cast<Insn*>(view);
7338 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7341 if (this->is_isa_v2)
7343 // Set 'a' bit. This is 0b00010 in BO field for branch
7344 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7345 // for branch on CTR insns (BO == 1a00t or 1a01t).
7346 if ((insn & (0x14 << 21)) == (0x04 << 21))
7348 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7355 // Invert 'y' bit if not the default.
7356 if (static_cast<Signed_address>(value) < 0)
7359 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7369 // Multi-instruction sequences that access the TOC can be
7370 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7371 // to nop; addi rb,r2,x;
7377 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7378 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7379 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7380 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7381 case elfcpp::R_POWERPC_GOT16_HA:
7382 case elfcpp::R_PPC64_TOC16_HA:
7383 if (parameters->options().toc_optimize())
7385 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7386 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7387 if ((insn & ((0x3f << 26) | 0x1f << 16))
7388 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7389 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7390 _("toc optimization is not supported "
7391 "for %#08x instruction"), insn);
7392 else if (value + 0x8000 < 0x10000)
7394 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
7400 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7401 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7402 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7403 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7404 case elfcpp::R_POWERPC_GOT16_LO:
7405 case elfcpp::R_PPC64_GOT16_LO_DS:
7406 case elfcpp::R_PPC64_TOC16_LO:
7407 case elfcpp::R_PPC64_TOC16_LO_DS:
7408 if (parameters->options().toc_optimize())
7410 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7411 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7412 if (!ok_lo_toc_insn(insn))
7413 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7414 _("toc optimization is not supported "
7415 "for %#08x instruction"), insn);
7416 else if (value + 0x8000 < 0x10000)
7418 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
7420 // Transform addic to addi when we change reg.
7421 insn &= ~((0x3f << 26) | (0x1f << 16));
7422 insn |= (14u << 26) | (2 << 16);
7426 insn &= ~(0x1f << 16);
7429 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7436 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
7437 elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr);
7440 case elfcpp::R_POWERPC_ADDR32:
7441 case elfcpp::R_POWERPC_UADDR32:
7443 overflow = Reloc::CHECK_BITFIELD;
7446 case elfcpp::R_POWERPC_REL32:
7448 overflow = Reloc::CHECK_SIGNED;
7451 case elfcpp::R_POWERPC_UADDR16:
7452 overflow = Reloc::CHECK_BITFIELD;
7455 case elfcpp::R_POWERPC_ADDR16:
7456 // We really should have three separate relocations,
7457 // one for 16-bit data, one for insns with 16-bit signed fields,
7458 // and one for insns with 16-bit unsigned fields.
7459 overflow = Reloc::CHECK_BITFIELD;
7460 if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
7461 overflow = Reloc::CHECK_LOW_INSN;
7464 case elfcpp::R_POWERPC_ADDR16_HI:
7465 case elfcpp::R_POWERPC_ADDR16_HA:
7466 case elfcpp::R_POWERPC_GOT16_HI:
7467 case elfcpp::R_POWERPC_GOT16_HA:
7468 case elfcpp::R_POWERPC_PLT16_HI:
7469 case elfcpp::R_POWERPC_PLT16_HA:
7470 case elfcpp::R_POWERPC_SECTOFF_HI:
7471 case elfcpp::R_POWERPC_SECTOFF_HA:
7472 case elfcpp::R_PPC64_TOC16_HI:
7473 case elfcpp::R_PPC64_TOC16_HA:
7474 case elfcpp::R_PPC64_PLTGOT16_HI:
7475 case elfcpp::R_PPC64_PLTGOT16_HA:
7476 case elfcpp::R_POWERPC_TPREL16_HI:
7477 case elfcpp::R_POWERPC_TPREL16_HA:
7478 case elfcpp::R_POWERPC_DTPREL16_HI:
7479 case elfcpp::R_POWERPC_DTPREL16_HA:
7480 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7481 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7482 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7483 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7484 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7485 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7486 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7487 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7488 case elfcpp::R_POWERPC_REL16_HI:
7489 case elfcpp::R_POWERPC_REL16_HA:
7491 overflow = Reloc::CHECK_HIGH_INSN;
7494 case elfcpp::R_POWERPC_REL16:
7495 case elfcpp::R_PPC64_TOC16:
7496 case elfcpp::R_POWERPC_GOT16:
7497 case elfcpp::R_POWERPC_SECTOFF:
7498 case elfcpp::R_POWERPC_TPREL16:
7499 case elfcpp::R_POWERPC_DTPREL16:
7500 case elfcpp::R_POWERPC_GOT_TLSGD16:
7501 case elfcpp::R_POWERPC_GOT_TLSLD16:
7502 case elfcpp::R_POWERPC_GOT_TPREL16:
7503 case elfcpp::R_POWERPC_GOT_DTPREL16:
7504 overflow = Reloc::CHECK_LOW_INSN;
7507 case elfcpp::R_POWERPC_ADDR24:
7508 case elfcpp::R_POWERPC_ADDR14:
7509 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7510 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7511 case elfcpp::R_PPC64_ADDR16_DS:
7512 case elfcpp::R_POWERPC_REL24:
7513 case elfcpp::R_PPC_PLTREL24:
7514 case elfcpp::R_PPC_LOCAL24PC:
7515 case elfcpp::R_PPC64_TPREL16_DS:
7516 case elfcpp::R_PPC64_DTPREL16_DS:
7517 case elfcpp::R_PPC64_TOC16_DS:
7518 case elfcpp::R_PPC64_GOT16_DS:
7519 case elfcpp::R_PPC64_SECTOFF_DS:
7520 case elfcpp::R_POWERPC_REL14:
7521 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7522 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7523 overflow = Reloc::CHECK_SIGNED;
7527 if (overflow == Reloc::CHECK_LOW_INSN
7528 || overflow == Reloc::CHECK_HIGH_INSN)
7530 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7531 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7533 overflow = Reloc::CHECK_SIGNED;
7534 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
7535 overflow = Reloc::CHECK_BITFIELD;
7536 else if (overflow == Reloc::CHECK_LOW_INSN
7537 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
7538 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
7539 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
7540 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
7541 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
7542 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
7543 overflow = Reloc::CHECK_UNSIGNED;
7546 typename Powerpc_relocate_functions<size, big_endian>::Status status
7547 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
7550 case elfcpp::R_POWERPC_NONE:
7551 case elfcpp::R_POWERPC_TLS:
7552 case elfcpp::R_POWERPC_GNU_VTINHERIT:
7553 case elfcpp::R_POWERPC_GNU_VTENTRY:
7556 case elfcpp::R_PPC64_ADDR64:
7557 case elfcpp::R_PPC64_REL64:
7558 case elfcpp::R_PPC64_TOC:
7559 case elfcpp::R_PPC64_ADDR64_LOCAL:
7560 Reloc::addr64(view, value);
7563 case elfcpp::R_POWERPC_TPREL:
7564 case elfcpp::R_POWERPC_DTPREL:
7566 Reloc::addr64(view, value);
7568 status = Reloc::addr32(view, value, overflow);
7571 case elfcpp::R_PPC64_UADDR64:
7572 Reloc::addr64_u(view, value);
7575 case elfcpp::R_POWERPC_ADDR32:
7576 status = Reloc::addr32(view, value, overflow);
7579 case elfcpp::R_POWERPC_REL32:
7580 case elfcpp::R_POWERPC_UADDR32:
7581 status = Reloc::addr32_u(view, value, overflow);
7584 case elfcpp::R_POWERPC_ADDR24:
7585 case elfcpp::R_POWERPC_REL24:
7586 case elfcpp::R_PPC_PLTREL24:
7587 case elfcpp::R_PPC_LOCAL24PC:
7588 status = Reloc::addr24(view, value, overflow);
7591 case elfcpp::R_POWERPC_GOT_DTPREL16:
7592 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7595 status = Reloc::addr16_ds(view, value, overflow);
7598 case elfcpp::R_POWERPC_ADDR16:
7599 case elfcpp::R_POWERPC_REL16:
7600 case elfcpp::R_PPC64_TOC16:
7601 case elfcpp::R_POWERPC_GOT16:
7602 case elfcpp::R_POWERPC_SECTOFF:
7603 case elfcpp::R_POWERPC_TPREL16:
7604 case elfcpp::R_POWERPC_DTPREL16:
7605 case elfcpp::R_POWERPC_GOT_TLSGD16:
7606 case elfcpp::R_POWERPC_GOT_TLSLD16:
7607 case elfcpp::R_POWERPC_GOT_TPREL16:
7608 case elfcpp::R_POWERPC_ADDR16_LO:
7609 case elfcpp::R_POWERPC_REL16_LO:
7610 case elfcpp::R_PPC64_TOC16_LO:
7611 case elfcpp::R_POWERPC_GOT16_LO:
7612 case elfcpp::R_POWERPC_SECTOFF_LO:
7613 case elfcpp::R_POWERPC_TPREL16_LO:
7614 case elfcpp::R_POWERPC_DTPREL16_LO:
7615 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7616 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7617 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7618 status = Reloc::addr16(view, value, overflow);
7621 case elfcpp::R_POWERPC_UADDR16:
7622 status = Reloc::addr16_u(view, value, overflow);
7625 case elfcpp::R_PPC64_ADDR16_HIGH:
7626 case elfcpp::R_PPC64_TPREL16_HIGH:
7627 case elfcpp::R_PPC64_DTPREL16_HIGH:
7629 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7631 case elfcpp::R_POWERPC_ADDR16_HI:
7632 case elfcpp::R_POWERPC_REL16_HI:
7633 case elfcpp::R_PPC64_TOC16_HI:
7634 case elfcpp::R_POWERPC_GOT16_HI:
7635 case elfcpp::R_POWERPC_SECTOFF_HI:
7636 case elfcpp::R_POWERPC_TPREL16_HI:
7637 case elfcpp::R_POWERPC_DTPREL16_HI:
7638 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7639 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7640 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7641 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7642 Reloc::addr16_hi(view, value);
7645 case elfcpp::R_PPC64_ADDR16_HIGHA:
7646 case elfcpp::R_PPC64_TPREL16_HIGHA:
7647 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7649 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7651 case elfcpp::R_POWERPC_ADDR16_HA:
7652 case elfcpp::R_POWERPC_REL16_HA:
7653 case elfcpp::R_PPC64_TOC16_HA:
7654 case elfcpp::R_POWERPC_GOT16_HA:
7655 case elfcpp::R_POWERPC_SECTOFF_HA:
7656 case elfcpp::R_POWERPC_TPREL16_HA:
7657 case elfcpp::R_POWERPC_DTPREL16_HA:
7658 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7659 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7660 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7661 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7662 Reloc::addr16_ha(view, value);
7665 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7667 // R_PPC_EMB_NADDR16_LO
7669 case elfcpp::R_PPC64_ADDR16_HIGHER:
7670 case elfcpp::R_PPC64_TPREL16_HIGHER:
7671 Reloc::addr16_hi2(view, value);
7674 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7676 // R_PPC_EMB_NADDR16_HI
7678 case elfcpp::R_PPC64_ADDR16_HIGHERA:
7679 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7680 Reloc::addr16_ha2(view, value);
7683 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7685 // R_PPC_EMB_NADDR16_HA
7687 case elfcpp::R_PPC64_ADDR16_HIGHEST:
7688 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7689 Reloc::addr16_hi3(view, value);
7692 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7696 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
7697 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7698 Reloc::addr16_ha3(view, value);
7701 case elfcpp::R_PPC64_DTPREL16_DS:
7702 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7704 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7706 case elfcpp::R_PPC64_TPREL16_DS:
7707 case elfcpp::R_PPC64_TPREL16_LO_DS:
7709 // R_PPC_TLSGD, R_PPC_TLSLD
7711 case elfcpp::R_PPC64_ADDR16_DS:
7712 case elfcpp::R_PPC64_ADDR16_LO_DS:
7713 case elfcpp::R_PPC64_TOC16_DS:
7714 case elfcpp::R_PPC64_TOC16_LO_DS:
7715 case elfcpp::R_PPC64_GOT16_DS:
7716 case elfcpp::R_PPC64_GOT16_LO_DS:
7717 case elfcpp::R_PPC64_SECTOFF_DS:
7718 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7719 status = Reloc::addr16_ds(view, value, overflow);
7722 case elfcpp::R_POWERPC_ADDR14:
7723 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7724 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7725 case elfcpp::R_POWERPC_REL14:
7726 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7727 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7728 status = Reloc::addr14(view, value, overflow);
7731 case elfcpp::R_POWERPC_COPY:
7732 case elfcpp::R_POWERPC_GLOB_DAT:
7733 case elfcpp::R_POWERPC_JMP_SLOT:
7734 case elfcpp::R_POWERPC_RELATIVE:
7735 case elfcpp::R_POWERPC_DTPMOD:
7736 case elfcpp::R_PPC64_JMP_IREL:
7737 case elfcpp::R_POWERPC_IRELATIVE:
7738 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7739 _("unexpected reloc %u in object file"),
7743 case elfcpp::R_PPC_EMB_SDA21:
7748 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7752 case elfcpp::R_PPC_EMB_SDA2I16:
7753 case elfcpp::R_PPC_EMB_SDA2REL:
7756 // R_PPC64_TLSGD, R_PPC64_TLSLD
7759 case elfcpp::R_POWERPC_PLT32:
7760 case elfcpp::R_POWERPC_PLTREL32:
7761 case elfcpp::R_POWERPC_PLT16_LO:
7762 case elfcpp::R_POWERPC_PLT16_HI:
7763 case elfcpp::R_POWERPC_PLT16_HA:
7764 case elfcpp::R_PPC_SDAREL16:
7765 case elfcpp::R_POWERPC_ADDR30:
7766 case elfcpp::R_PPC64_PLT64:
7767 case elfcpp::R_PPC64_PLTREL64:
7768 case elfcpp::R_PPC64_PLTGOT16:
7769 case elfcpp::R_PPC64_PLTGOT16_LO:
7770 case elfcpp::R_PPC64_PLTGOT16_HI:
7771 case elfcpp::R_PPC64_PLTGOT16_HA:
7772 case elfcpp::R_PPC64_PLT16_LO_DS:
7773 case elfcpp::R_PPC64_PLTGOT16_DS:
7774 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
7775 case elfcpp::R_PPC_EMB_RELSDA:
7776 case elfcpp::R_PPC_TOC16:
7779 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7780 _("unsupported reloc %u"),
7784 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
7787 && gsym->is_weak_undefined()
7788 && is_branch_reloc(r_type))))
7790 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7791 _("relocation overflow"));
7793 gold_info(_("try relinking with a smaller --stub-group-size"));
7799 // Relocate section data.
7801 template<int size, bool big_endian>
7803 Target_powerpc<size, big_endian>::relocate_section(
7804 const Relocate_info<size, big_endian>* relinfo,
7805 unsigned int sh_type,
7806 const unsigned char* prelocs,
7808 Output_section* output_section,
7809 bool needs_special_offset_handling,
7810 unsigned char* view,
7812 section_size_type view_size,
7813 const Reloc_symbol_changes* reloc_symbol_changes)
7815 typedef Target_powerpc<size, big_endian> Powerpc;
7816 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
7817 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
7818 Powerpc_comdat_behavior;
7820 gold_assert(sh_type == elfcpp::SHT_RELA);
7822 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
7823 Powerpc_relocate, Powerpc_comdat_behavior>(
7829 needs_special_offset_handling,
7833 reloc_symbol_changes);
7836 class Powerpc_scan_relocatable_reloc
7839 // Return the strategy to use for a local symbol which is not a
7840 // section symbol, given the relocation type.
7841 inline Relocatable_relocs::Reloc_strategy
7842 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
7844 if (r_type == 0 && r_sym == 0)
7845 return Relocatable_relocs::RELOC_DISCARD;
7846 return Relocatable_relocs::RELOC_COPY;
7849 // Return the strategy to use for a local symbol which is a section
7850 // symbol, given the relocation type.
7851 inline Relocatable_relocs::Reloc_strategy
7852 local_section_strategy(unsigned int, Relobj*)
7854 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
7857 // Return the strategy to use for a global symbol, given the
7858 // relocation type, the object, and the symbol index.
7859 inline Relocatable_relocs::Reloc_strategy
7860 global_strategy(unsigned int r_type, Relobj*, unsigned int)
7862 if (r_type == elfcpp::R_PPC_PLTREL24)
7863 return Relocatable_relocs::RELOC_SPECIAL;
7864 return Relocatable_relocs::RELOC_COPY;
7868 // Scan the relocs during a relocatable link.
7870 template<int size, bool big_endian>
7872 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
7873 Symbol_table* symtab,
7875 Sized_relobj_file<size, big_endian>* object,
7876 unsigned int data_shndx,
7877 unsigned int sh_type,
7878 const unsigned char* prelocs,
7880 Output_section* output_section,
7881 bool needs_special_offset_handling,
7882 size_t local_symbol_count,
7883 const unsigned char* plocal_symbols,
7884 Relocatable_relocs* rr)
7886 gold_assert(sh_type == elfcpp::SHT_RELA);
7888 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
7889 Powerpc_scan_relocatable_reloc>(
7897 needs_special_offset_handling,
7903 // Emit relocations for a section.
7904 // This is a modified version of the function by the same name in
7905 // target-reloc.h. Using relocate_special_relocatable for
7906 // R_PPC_PLTREL24 would require duplication of the entire body of the
7907 // loop, so we may as well duplicate the whole thing.
7909 template<int size, bool big_endian>
7911 Target_powerpc<size, big_endian>::relocate_relocs(
7912 const Relocate_info<size, big_endian>* relinfo,
7913 unsigned int sh_type,
7914 const unsigned char* prelocs,
7916 Output_section* output_section,
7917 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
7918 const Relocatable_relocs* rr,
7920 Address view_address,
7922 unsigned char* reloc_view,
7923 section_size_type reloc_view_size)
7925 gold_assert(sh_type == elfcpp::SHT_RELA);
7927 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
7929 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
7931 const int reloc_size
7932 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
7934 Powerpc_relobj<size, big_endian>* const object
7935 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
7936 const unsigned int local_count = object->local_symbol_count();
7937 unsigned int got2_shndx = object->got2_shndx();
7938 Address got2_addend = 0;
7939 if (got2_shndx != 0)
7941 got2_addend = object->get_output_section_offset(got2_shndx);
7942 gold_assert(got2_addend != invalid_address);
7945 unsigned char* pwrite = reloc_view;
7946 bool zap_next = false;
7947 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
7949 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
7950 if (strategy == Relocatable_relocs::RELOC_DISCARD)
7953 Reltype reloc(prelocs);
7954 Reltype_write reloc_write(pwrite);
7956 Address offset = reloc.get_r_offset();
7957 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
7958 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
7959 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
7960 const unsigned int orig_r_sym = r_sym;
7961 typename elfcpp::Elf_types<size>::Elf_Swxword addend
7962 = reloc.get_r_addend();
7963 const Symbol* gsym = NULL;
7967 // We could arrange to discard these and other relocs for
7968 // tls optimised sequences in the strategy methods, but for
7969 // now do as BFD ld does.
7970 r_type = elfcpp::R_POWERPC_NONE;
7974 // Get the new symbol index.
7975 if (r_sym < local_count)
7979 case Relocatable_relocs::RELOC_COPY:
7980 case Relocatable_relocs::RELOC_SPECIAL:
7983 r_sym = object->symtab_index(r_sym);
7984 gold_assert(r_sym != -1U);
7988 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
7990 // We are adjusting a section symbol. We need to find
7991 // the symbol table index of the section symbol for
7992 // the output section corresponding to input section
7993 // in which this symbol is defined.
7994 gold_assert(r_sym < local_count);
7996 unsigned int shndx =
7997 object->local_symbol_input_shndx(r_sym, &is_ordinary);
7998 gold_assert(is_ordinary);
7999 Output_section* os = object->output_section(shndx);
8000 gold_assert(os != NULL);
8001 gold_assert(os->needs_symtab_index());
8002 r_sym = os->symtab_index();
8012 gsym = object->global_symbol(r_sym);
8013 gold_assert(gsym != NULL);
8014 if (gsym->is_forwarder())
8015 gsym = relinfo->symtab->resolve_forwards(gsym);
8017 gold_assert(gsym->has_symtab_index());
8018 r_sym = gsym->symtab_index();
8021 // Get the new offset--the location in the output section where
8022 // this relocation should be applied.
8023 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8024 offset += offset_in_output_section;
8027 section_offset_type sot_offset =
8028 convert_types<section_offset_type, Address>(offset);
8029 section_offset_type new_sot_offset =
8030 output_section->output_offset(object, relinfo->data_shndx,
8032 gold_assert(new_sot_offset != -1);
8033 offset = new_sot_offset;
8036 // In an object file, r_offset is an offset within the section.
8037 // In an executable or dynamic object, generated by
8038 // --emit-relocs, r_offset is an absolute address.
8039 if (!parameters->options().relocatable())
8041 offset += view_address;
8042 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8043 offset -= offset_in_output_section;
8046 // Handle the reloc addend based on the strategy.
8047 if (strategy == Relocatable_relocs::RELOC_COPY)
8049 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
8051 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
8052 addend = psymval->value(object, addend);
8054 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
8056 if (addend >= 32768)
8057 addend += got2_addend;
8062 if (!parameters->options().relocatable())
8064 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8065 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
8066 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
8067 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
8069 // First instruction of a global dynamic sequence,
8071 const bool final = gsym == NULL || gsym->final_value_is_known();
8072 switch (this->optimize_tls_gd(final))
8074 case tls::TLSOPT_TO_IE:
8075 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
8076 - elfcpp::R_POWERPC_GOT_TLSGD16);
8078 case tls::TLSOPT_TO_LE:
8079 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8080 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
8081 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8084 r_type = elfcpp::R_POWERPC_NONE;
8085 offset -= 2 * big_endian;
8092 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8093 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
8094 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
8095 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
8097 // First instruction of a local dynamic sequence,
8099 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8101 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8102 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
8104 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8105 const Output_section* os = relinfo->layout->tls_segment()
8107 gold_assert(os != NULL);
8108 gold_assert(os->needs_symtab_index());
8109 r_sym = os->symtab_index();
8110 addend = dtp_offset;
8114 r_type = elfcpp::R_POWERPC_NONE;
8115 offset -= 2 * big_endian;
8119 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8120 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
8121 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
8122 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
8124 // First instruction of initial exec sequence.
8125 const bool final = gsym == NULL || gsym->final_value_is_known();
8126 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8128 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8129 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
8130 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8133 r_type = elfcpp::R_POWERPC_NONE;
8134 offset -= 2 * big_endian;
8138 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
8139 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
8141 // Second instruction of a global dynamic sequence,
8142 // the __tls_get_addr call
8143 const bool final = gsym == NULL || gsym->final_value_is_known();
8144 switch (this->optimize_tls_gd(final))
8146 case tls::TLSOPT_TO_IE:
8147 r_type = elfcpp::R_POWERPC_NONE;
8150 case tls::TLSOPT_TO_LE:
8151 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8152 offset += 2 * big_endian;
8159 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
8160 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
8162 // Second instruction of a local dynamic sequence,
8163 // the __tls_get_addr call
8164 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8166 const Output_section* os = relinfo->layout->tls_segment()
8168 gold_assert(os != NULL);
8169 gold_assert(os->needs_symtab_index());
8170 r_sym = os->symtab_index();
8171 addend = dtp_offset;
8172 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8173 offset += 2 * big_endian;
8177 else if (r_type == elfcpp::R_POWERPC_TLS)
8179 // Second instruction of an initial exec sequence
8180 const bool final = gsym == NULL || gsym->final_value_is_known();
8181 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8183 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8184 offset += 2 * big_endian;
8189 reloc_write.put_r_offset(offset);
8190 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
8191 reloc_write.put_r_addend(addend);
8193 pwrite += reloc_size;
8196 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
8197 == reloc_view_size);
8200 // Return the value to use for a dynamic symbol which requires special
8201 // treatment. This is how we support equality comparisons of function
8202 // pointers across shared library boundaries, as described in the
8203 // processor specific ABI supplement.
8205 template<int size, bool big_endian>
8207 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
8211 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
8212 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8213 p != this->stub_tables_.end();
8216 Address off = (*p)->find_plt_call_entry(gsym);
8217 if (off != invalid_address)
8218 return (*p)->stub_address() + off;
8221 else if (this->abiversion() >= 2)
8223 unsigned int off = this->glink_section()->find_global_entry(gsym);
8224 if (off != (unsigned int)-1)
8225 return this->glink_section()->global_entry_address() + off;
8230 // Return the PLT address to use for a local symbol.
8231 template<int size, bool big_endian>
8233 Target_powerpc<size, big_endian>::do_plt_address_for_local(
8234 const Relobj* object,
8235 unsigned int symndx) const
8239 const Sized_relobj<size, big_endian>* relobj
8240 = static_cast<const Sized_relobj<size, big_endian>*>(object);
8241 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8242 p != this->stub_tables_.end();
8245 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
8247 if (off != invalid_address)
8248 return (*p)->stub_address() + off;
8254 // Return the PLT address to use for a global symbol.
8255 template<int size, bool big_endian>
8257 Target_powerpc<size, big_endian>::do_plt_address_for_global(
8258 const Symbol* gsym) const
8262 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8263 p != this->stub_tables_.end();
8266 Address off = (*p)->find_plt_call_entry(gsym);
8267 if (off != invalid_address)
8268 return (*p)->stub_address() + off;
8271 else if (this->abiversion() >= 2)
8273 unsigned int off = this->glink_section()->find_global_entry(gsym);
8274 if (off != (unsigned int)-1)
8275 return this->glink_section()->global_entry_address() + off;
8280 // Return the offset to use for the GOT_INDX'th got entry which is
8281 // for a local tls symbol specified by OBJECT, SYMNDX.
8282 template<int size, bool big_endian>
8284 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
8285 const Relobj* object,
8286 unsigned int symndx,
8287 unsigned int got_indx) const
8289 const Powerpc_relobj<size, big_endian>* ppc_object
8290 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
8291 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
8293 for (Got_type got_type = GOT_TYPE_TLSGD;
8294 got_type <= GOT_TYPE_TPREL;
8295 got_type = Got_type(got_type + 1))
8296 if (ppc_object->local_has_got_offset(symndx, got_type))
8298 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
8299 if (got_type == GOT_TYPE_TLSGD)
8301 if (off == got_indx * (size / 8))
8303 if (got_type == GOT_TYPE_TPREL)
8313 // Return the offset to use for the GOT_INDX'th got entry which is
8314 // for global tls symbol GSYM.
8315 template<int size, bool big_endian>
8317 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
8319 unsigned int got_indx) const
8321 if (gsym->type() == elfcpp::STT_TLS)
8323 for (Got_type got_type = GOT_TYPE_TLSGD;
8324 got_type <= GOT_TYPE_TPREL;
8325 got_type = Got_type(got_type + 1))
8326 if (gsym->has_got_offset(got_type))
8328 unsigned int off = gsym->got_offset(got_type);
8329 if (got_type == GOT_TYPE_TLSGD)
8331 if (off == got_indx * (size / 8))
8333 if (got_type == GOT_TYPE_TPREL)
8343 // The selector for powerpc object files.
8345 template<int size, bool big_endian>
8346 class Target_selector_powerpc : public Target_selector
8349 Target_selector_powerpc()
8350 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
8353 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
8354 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
8356 ? (big_endian ? "elf64ppc" : "elf64lppc")
8357 : (big_endian ? "elf32ppc" : "elf32lppc")))
8361 do_instantiate_target()
8362 { return new Target_powerpc<size, big_endian>(); }
8365 Target_selector_powerpc<32, true> target_selector_ppc32;
8366 Target_selector_powerpc<32, false> target_selector_ppc32le;
8367 Target_selector_powerpc<64, true> target_selector_ppc64;
8368 Target_selector_powerpc<64, false> target_selector_ppc64le;
8370 // Instantiate these constants for -O0
8371 template<int size, bool big_endian>
8372 const int Output_data_glink<size, big_endian>::pltresolve_size;
8373 template<int size, bool big_endian>
8374 const typename Output_data_glink<size, big_endian>::Address
8375 Output_data_glink<size, big_endian>::invalid_address;
8376 template<int size, bool big_endian>
8377 const typename Stub_table<size, big_endian>::Address
8378 Stub_table<size, big_endian>::invalid_address;
8379 template<int size, bool big_endian>
8380 const typename Target_powerpc<size, big_endian>::Address
8381 Target_powerpc<size, big_endian>::invalid_address;
8383 } // End anonymous namespace.