1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size, bool big_endian>
51 class Output_data_plt_powerpc;
53 template<int size, bool big_endian>
54 class Output_data_brlt_powerpc;
56 template<int size, bool big_endian>
57 class Output_data_got_powerpc;
59 template<int size, bool big_endian>
60 class Output_data_glink;
62 template<int size, bool big_endian>
65 template<int size, bool big_endian>
66 class Output_data_save_res;
68 template<int size, bool big_endian>
71 struct Stub_table_owner
73 Output_section* output_section;
74 const Output_section::Input_section* owner;
78 is_branch_reloc(unsigned int r_type);
80 template<int size, bool big_endian>
81 class Powerpc_relobj : public Sized_relobj_file<size, big_endian>
84 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
85 typedef Unordered_set<Section_id, Section_id_hash> Section_refs;
86 typedef Unordered_map<Address, Section_refs> Access_from;
88 Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset,
89 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
90 : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
91 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
92 opd_ent_(), access_from_map_(), has14_(), stub_table_index_(),
93 e_flags_(ehdr.get_e_flags()), st_other_()
95 this->set_abiversion(0);
101 // Read the symbols then set up st_other vector.
103 do_read_symbols(Read_symbols_data*);
105 // The .got2 section shndx.
110 return this->special_;
115 // The .opd section shndx.
122 return this->special_;
125 // Init OPD entry arrays.
127 init_opd(size_t opd_size)
129 size_t count = this->opd_ent_ndx(opd_size);
130 this->opd_ent_.resize(count);
133 // Return section and offset of function entry for .opd + R_OFF.
135 get_opd_ent(Address r_off, Address* value = NULL) const
137 size_t ndx = this->opd_ent_ndx(r_off);
138 gold_assert(ndx < this->opd_ent_.size());
139 gold_assert(this->opd_ent_[ndx].shndx != 0);
141 *value = this->opd_ent_[ndx].off;
142 return this->opd_ent_[ndx].shndx;
145 // Set section and offset of function entry for .opd + R_OFF.
147 set_opd_ent(Address r_off, unsigned int shndx, Address value)
149 size_t ndx = this->opd_ent_ndx(r_off);
150 gold_assert(ndx < this->opd_ent_.size());
151 this->opd_ent_[ndx].shndx = shndx;
152 this->opd_ent_[ndx].off = value;
155 // Return discard flag for .opd + R_OFF.
157 get_opd_discard(Address r_off) const
159 size_t ndx = this->opd_ent_ndx(r_off);
160 gold_assert(ndx < this->opd_ent_.size());
161 return this->opd_ent_[ndx].discard;
164 // Set discard flag for .opd + R_OFF.
166 set_opd_discard(Address r_off)
168 size_t ndx = this->opd_ent_ndx(r_off);
169 gold_assert(ndx < this->opd_ent_.size());
170 this->opd_ent_[ndx].discard = true;
175 { return this->opd_valid_; }
179 { this->opd_valid_ = true; }
181 // Examine .rela.opd to build info about function entry points.
183 scan_opd_relocs(size_t reloc_count,
184 const unsigned char* prelocs,
185 const unsigned char* plocal_syms);
187 // Perform the Sized_relobj_file method, then set up opd info from
190 do_read_relocs(Read_relocs_data*);
193 do_find_special_sections(Read_symbols_data* sd);
195 // Adjust this local symbol value. Return false if the symbol
196 // should be discarded from the output file.
198 do_adjust_local_symbol(Symbol_value<size>* lv) const
200 if (size == 64 && this->opd_shndx() != 0)
203 if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
205 if (this->get_opd_discard(lv->input_value()))
213 { return &this->access_from_map_; }
215 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
216 // section at DST_OFF.
218 add_reference(Relobj* src_obj,
219 unsigned int src_indx,
220 typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
222 Section_id src_id(src_obj, src_indx);
223 this->access_from_map_[dst_off].insert(src_id);
226 // Add a reference to the code section specified by the .opd entry
229 add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
231 size_t ndx = this->opd_ent_ndx(dst_off);
232 if (ndx >= this->opd_ent_.size())
233 this->opd_ent_.resize(ndx + 1);
234 this->opd_ent_[ndx].gc_mark = true;
238 process_gc_mark(Symbol_table* symtab)
240 for (size_t i = 0; i < this->opd_ent_.size(); i++)
241 if (this->opd_ent_[i].gc_mark)
243 unsigned int shndx = this->opd_ent_[i].shndx;
244 symtab->gc()->worklist().push_back(Section_id(this, shndx));
248 // Return offset in output GOT section that this object will use
249 // as a TOC pointer. Won't be just a constant with multi-toc support.
251 toc_base_offset() const
255 set_has_small_toc_reloc()
256 { has_small_toc_reloc_ = true; }
259 has_small_toc_reloc() const
260 { return has_small_toc_reloc_; }
263 set_has_14bit_branch(unsigned int shndx)
265 if (shndx >= this->has14_.size())
266 this->has14_.resize(shndx + 1);
267 this->has14_[shndx] = true;
271 has_14bit_branch(unsigned int shndx) const
272 { return shndx < this->has14_.size() && this->has14_[shndx]; }
275 set_stub_table(unsigned int shndx, unsigned int stub_index)
277 if (shndx >= this->stub_table_index_.size())
278 this->stub_table_index_.resize(shndx + 1);
279 this->stub_table_index_[shndx] = stub_index;
282 Stub_table<size, big_endian>*
283 stub_table(unsigned int shndx)
285 if (shndx < this->stub_table_index_.size())
287 Target_powerpc<size, big_endian>* target
288 = static_cast<Target_powerpc<size, big_endian>*>(
289 parameters->sized_target<size, big_endian>());
290 unsigned int indx = this->stub_table_index_[shndx];
291 gold_assert(indx < target->stub_tables().size());
292 return target->stub_tables()[indx];
300 this->stub_table_index_.clear();
305 { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
307 // Set ABI version for input and output
309 set_abiversion(int ver);
312 ppc64_local_entry_offset(const Symbol* sym) const
313 { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); }
316 ppc64_local_entry_offset(unsigned int symndx) const
317 { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); }
328 // Return index into opd_ent_ array for .opd entry at OFF.
329 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
330 // apart when the language doesn't use the last 8-byte word, the
331 // environment pointer. Thus dividing the entry section offset by
332 // 16 will give an index into opd_ent_ that works for either layout
333 // of .opd. (It leaves some elements of the vector unused when .opd
334 // entries are spaced 24 bytes apart, but we don't know the spacing
335 // until relocations are processed, and in any case it is possible
336 // for an object to have some entries spaced 16 bytes apart and
337 // others 24 bytes apart.)
339 opd_ent_ndx(size_t off) const
342 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
343 unsigned int special_;
345 // For 64-bit, whether this object uses small model relocs to access
347 bool has_small_toc_reloc_;
349 // Set at the start of gc_process_relocs, when we know opd_ent_
350 // vector is valid. The flag could be made atomic and set in
351 // do_read_relocs with memory_order_release and then tested with
352 // memory_order_acquire, potentially resulting in fewer entries in
356 // The first 8-byte word of an OPD entry gives the address of the
357 // entry point of the function. Relocatable object files have a
358 // relocation on this word. The following vector records the
359 // section and offset specified by these relocations.
360 std::vector<Opd_ent> opd_ent_;
362 // References made to this object's .opd section when running
363 // gc_process_relocs for another object, before the opd_ent_ vector
364 // is valid for this object.
365 Access_from access_from_map_;
367 // Whether input section has a 14-bit branch reloc.
368 std::vector<bool> has14_;
370 // The stub table to use for a given input section.
371 std::vector<unsigned int> stub_table_index_;
374 elfcpp::Elf_Word e_flags_;
376 // ELF st_other field for local symbols.
377 std::vector<unsigned char> st_other_;
380 template<int size, bool big_endian>
381 class Powerpc_dynobj : public Sized_dynobj<size, big_endian>
384 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
386 Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset,
387 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
388 : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr),
389 opd_shndx_(0), opd_ent_(), e_flags_(ehdr.get_e_flags())
391 this->set_abiversion(0);
397 // Call Sized_dynobj::do_read_symbols to read the symbols then
398 // read .opd from a dynamic object, filling in opd_ent_ vector,
400 do_read_symbols(Read_symbols_data*);
402 // The .opd section shndx.
406 return this->opd_shndx_;
409 // The .opd section address.
413 return this->opd_address_;
416 // Init OPD entry arrays.
418 init_opd(size_t opd_size)
420 size_t count = this->opd_ent_ndx(opd_size);
421 this->opd_ent_.resize(count);
424 // Return section and offset of function entry for .opd + R_OFF.
426 get_opd_ent(Address r_off, Address* value = NULL) const
428 size_t ndx = this->opd_ent_ndx(r_off);
429 gold_assert(ndx < this->opd_ent_.size());
430 gold_assert(this->opd_ent_[ndx].shndx != 0);
432 *value = this->opd_ent_[ndx].off;
433 return this->opd_ent_[ndx].shndx;
436 // Set section and offset of function entry for .opd + R_OFF.
438 set_opd_ent(Address r_off, unsigned int shndx, Address value)
440 size_t ndx = this->opd_ent_ndx(r_off);
441 gold_assert(ndx < this->opd_ent_.size());
442 this->opd_ent_[ndx].shndx = shndx;
443 this->opd_ent_[ndx].off = value;
448 { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
450 // Set ABI version for input and output.
452 set_abiversion(int ver);
455 // Used to specify extent of executable sections.
458 Sec_info(Address start_, Address len_, unsigned int shndx_)
459 : start(start_), len(len_), shndx(shndx_)
463 operator<(const Sec_info& that) const
464 { return this->start < that.start; }
477 // Return index into opd_ent_ array for .opd entry at OFF.
479 opd_ent_ndx(size_t off) const
482 // For 64-bit the .opd section shndx and address.
483 unsigned int opd_shndx_;
484 Address opd_address_;
486 // The first 8-byte word of an OPD entry gives the address of the
487 // entry point of the function. Records the section and offset
488 // corresponding to the address. Note that in dynamic objects,
489 // offset is *not* relative to the section.
490 std::vector<Opd_ent> opd_ent_;
493 elfcpp::Elf_Word e_flags_;
496 template<int size, bool big_endian>
497 class Target_powerpc : public Sized_target<size, big_endian>
501 Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
502 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
503 typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
504 static const Address invalid_address = static_cast<Address>(0) - 1;
505 // Offset of tp and dtp pointers from start of TLS block.
506 static const Address tp_offset = 0x7000;
507 static const Address dtp_offset = 0x8000;
510 : Sized_target<size, big_endian>(&powerpc_info),
511 got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL),
512 glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY),
513 tlsld_got_offset_(-1U),
514 stub_tables_(), branch_lookup_table_(), branch_info_(),
515 plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0),
516 stub_group_size_(0), savres_section_(0)
520 // Process the relocations to determine unreferenced sections for
521 // garbage collection.
523 gc_process_relocs(Symbol_table* symtab,
525 Sized_relobj_file<size, big_endian>* object,
526 unsigned int data_shndx,
527 unsigned int sh_type,
528 const unsigned char* prelocs,
530 Output_section* output_section,
531 bool needs_special_offset_handling,
532 size_t local_symbol_count,
533 const unsigned char* plocal_symbols);
535 // Scan the relocations to look for symbol adjustments.
537 scan_relocs(Symbol_table* symtab,
539 Sized_relobj_file<size, big_endian>* object,
540 unsigned int data_shndx,
541 unsigned int sh_type,
542 const unsigned char* prelocs,
544 Output_section* output_section,
545 bool needs_special_offset_handling,
546 size_t local_symbol_count,
547 const unsigned char* plocal_symbols);
549 // Map input .toc section to output .got section.
551 do_output_section_name(const Relobj*, const char* name, size_t* plen) const
553 if (size == 64 && strcmp(name, ".toc") == 0)
561 // Provide linker defined save/restore functions.
563 define_save_restore_funcs(Layout*, Symbol_table*);
565 // No stubs unless a final link.
568 { return !parameters->options().relocatable(); }
571 do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
574 do_plt_fde_location(const Output_data*, unsigned char*,
575 uint64_t*, off_t*) const;
577 // Stash info about branches, for stub generation.
579 push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
580 unsigned int data_shndx, Address r_offset,
581 unsigned int r_type, unsigned int r_sym, Address addend)
583 Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
584 this->branch_info_.push_back(info);
585 if (r_type == elfcpp::R_POWERPC_REL14
586 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
587 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
588 ppc_object->set_has_14bit_branch(data_shndx);
592 do_define_standard_symbols(Symbol_table*, Layout*);
594 // Finalize the sections.
596 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
598 // Return the value to use for a dynamic which requires special
601 do_dynsym_value(const Symbol*) const;
603 // Return the PLT address to use for a local symbol.
605 do_plt_address_for_local(const Relobj*, unsigned int) const;
607 // Return the PLT address to use for a global symbol.
609 do_plt_address_for_global(const Symbol*) const;
611 // Return the offset to use for the GOT_INDX'th got entry which is
612 // for a local tls symbol specified by OBJECT, SYMNDX.
614 do_tls_offset_for_local(const Relobj* object,
616 unsigned int got_indx) const;
618 // Return the offset to use for the GOT_INDX'th got entry which is
619 // for global tls symbol GSYM.
621 do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
624 do_function_location(Symbol_location*) const;
627 do_can_check_for_function_pointers() const
630 // Adjust -fsplit-stack code which calls non-split-stack code.
632 do_calls_non_split(Relobj* object, unsigned int shndx,
633 section_offset_type fnoffset, section_size_type fnsize,
634 unsigned char* view, section_size_type view_size,
635 std::string* from, std::string* to) const;
637 // Relocate a section.
639 relocate_section(const Relocate_info<size, big_endian>*,
640 unsigned int sh_type,
641 const unsigned char* prelocs,
643 Output_section* output_section,
644 bool needs_special_offset_handling,
646 Address view_address,
647 section_size_type view_size,
648 const Reloc_symbol_changes*);
650 // Scan the relocs during a relocatable link.
652 scan_relocatable_relocs(Symbol_table* symtab,
654 Sized_relobj_file<size, big_endian>* object,
655 unsigned int data_shndx,
656 unsigned int sh_type,
657 const unsigned char* prelocs,
659 Output_section* output_section,
660 bool needs_special_offset_handling,
661 size_t local_symbol_count,
662 const unsigned char* plocal_symbols,
663 Relocatable_relocs*);
665 // Emit relocations for a section.
667 relocate_relocs(const Relocate_info<size, big_endian>*,
668 unsigned int sh_type,
669 const unsigned char* prelocs,
671 Output_section* output_section,
672 typename elfcpp::Elf_types<size>::Elf_Off
673 offset_in_output_section,
674 const Relocatable_relocs*,
676 Address view_address,
678 unsigned char* reloc_view,
679 section_size_type reloc_view_size);
681 // Return whether SYM is defined by the ABI.
683 do_is_defined_by_abi(const Symbol* sym) const
685 return strcmp(sym->name(), "__tls_get_addr") == 0;
688 // Return the size of the GOT section.
692 gold_assert(this->got_ != NULL);
693 return this->got_->data_size();
696 // Get the PLT section.
697 const Output_data_plt_powerpc<size, big_endian>*
700 gold_assert(this->plt_ != NULL);
704 // Get the IPLT section.
705 const Output_data_plt_powerpc<size, big_endian>*
708 gold_assert(this->iplt_ != NULL);
712 // Get the .glink section.
713 const Output_data_glink<size, big_endian>*
714 glink_section() const
716 gold_assert(this->glink_ != NULL);
720 Output_data_glink<size, big_endian>*
723 gold_assert(this->glink_ != NULL);
727 bool has_glink() const
728 { return this->glink_ != NULL; }
730 // Get the GOT section.
731 const Output_data_got_powerpc<size, big_endian>*
734 gold_assert(this->got_ != NULL);
738 // Get the GOT section, creating it if necessary.
739 Output_data_got_powerpc<size, big_endian>*
740 got_section(Symbol_table*, Layout*);
743 do_make_elf_object(const std::string&, Input_file*, off_t,
744 const elfcpp::Ehdr<size, big_endian>&);
746 // Return the number of entries in the GOT.
748 got_entry_count() const
750 if (this->got_ == NULL)
752 return this->got_size() / (size / 8);
755 // Return the number of entries in the PLT.
757 plt_entry_count() const;
759 // Return the offset of the first non-reserved PLT entry.
761 first_plt_entry_offset() const
765 if (this->abiversion() >= 2)
770 // Return the size of each PLT entry.
772 plt_entry_size() const
776 if (this->abiversion() >= 2)
781 Output_data_save_res<size, big_endian>*
782 savres_section() const
784 return this->savres_section_;
787 // Add any special sections for this symbol to the gc work list.
788 // For powerpc64, this adds the code section of a function
791 do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
793 // Handle target specific gc actions when adding a gc reference from
794 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
795 // and DST_OFF. For powerpc64, this adds a referenc to the code
796 // section of a function descriptor.
798 do_gc_add_reference(Symbol_table* symtab,
800 unsigned int src_shndx,
802 unsigned int dst_shndx,
803 Address dst_off) const;
805 typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
808 { return this->stub_tables_; }
810 const Output_data_brlt_powerpc<size, big_endian>*
812 { return this->brlt_section_; }
815 add_branch_lookup_table(Address to)
817 unsigned int off = this->branch_lookup_table_.size() * (size / 8);
818 this->branch_lookup_table_.insert(std::make_pair(to, off));
822 find_branch_lookup_table(Address to)
824 typename Branch_lookup_table::const_iterator p
825 = this->branch_lookup_table_.find(to);
826 return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
830 write_branch_lookup_table(unsigned char *oview)
832 for (typename Branch_lookup_table::const_iterator p
833 = this->branch_lookup_table_.begin();
834 p != this->branch_lookup_table_.end();
837 elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first);
842 plt_thread_safe() const
843 { return this->plt_thread_safe_; }
847 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; }
850 set_abiversion (int ver)
852 elfcpp::Elf_Word flags = this->processor_specific_flags();
853 flags &= ~elfcpp::EF_PPC64_ABI;
854 flags |= ver & elfcpp::EF_PPC64_ABI;
855 this->set_processor_specific_flags(flags);
858 // Offset to to save stack slot
861 { return this->abiversion() < 2 ? 40 : 24; }
877 : tls_get_addr_(NOT_EXPECTED),
878 relinfo_(NULL), relnum_(0), r_offset_(0)
883 if (this->tls_get_addr_ != NOT_EXPECTED)
890 if (this->relinfo_ != NULL)
891 gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_,
892 _("missing expected __tls_get_addr call"));
896 expect_tls_get_addr_call(
897 const Relocate_info<size, big_endian>* relinfo,
901 this->tls_get_addr_ = EXPECTED;
902 this->relinfo_ = relinfo;
903 this->relnum_ = relnum;
904 this->r_offset_ = r_offset;
908 expect_tls_get_addr_call()
909 { this->tls_get_addr_ = EXPECTED; }
912 skip_next_tls_get_addr_call()
913 {this->tls_get_addr_ = SKIP; }
916 maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym)
918 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
919 || r_type == elfcpp::R_PPC_PLTREL24)
921 && strcmp(gsym->name(), "__tls_get_addr") == 0);
922 Tls_get_addr last_tls = this->tls_get_addr_;
923 this->tls_get_addr_ = NOT_EXPECTED;
924 if (is_tls_call && last_tls != EXPECTED)
926 else if (!is_tls_call && last_tls != NOT_EXPECTED)
935 // What we're up to regarding calls to __tls_get_addr.
936 // On powerpc, the branch and link insn making a call to
937 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
938 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
939 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
940 // The marker relocation always comes first, and has the same
941 // symbol as the reloc on the insn setting up the __tls_get_addr
942 // argument. This ties the arg setup insn with the call insn,
943 // allowing ld to safely optimize away the call. We check that
944 // every call to __tls_get_addr has a marker relocation, and that
945 // every marker relocation is on a call to __tls_get_addr.
946 Tls_get_addr tls_get_addr_;
947 // Info about the last reloc for error message.
948 const Relocate_info<size, big_endian>* relinfo_;
953 // The class which scans relocations.
954 class Scan : protected Track_tls
957 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
960 : Track_tls(), issued_non_pic_error_(false)
964 get_reference_flags(unsigned int r_type, const Target_powerpc* target);
967 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
968 Sized_relobj_file<size, big_endian>* object,
969 unsigned int data_shndx,
970 Output_section* output_section,
971 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
972 const elfcpp::Sym<size, big_endian>& lsym,
976 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
977 Sized_relobj_file<size, big_endian>* object,
978 unsigned int data_shndx,
979 Output_section* output_section,
980 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
984 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
986 Sized_relobj_file<size, big_endian>* relobj,
989 const elfcpp::Rela<size, big_endian>& ,
991 const elfcpp::Sym<size, big_endian>&)
993 // PowerPC64 .opd is not folded, so any identical function text
994 // may be folded and we'll still keep function addresses distinct.
995 // That means no reloc is of concern here.
998 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
999 <Powerpc_relobj<size, big_endian>*>(relobj);
1000 if (ppcobj->abiversion() == 1)
1003 // For 32-bit and ELFv2, conservatively assume anything but calls to
1004 // function code might be taking the address of the function.
1005 return !is_branch_reloc(r_type);
1009 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
1011 Sized_relobj_file<size, big_endian>* relobj,
1014 const elfcpp::Rela<size, big_endian>& ,
1015 unsigned int r_type,
1021 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
1022 <Powerpc_relobj<size, big_endian>*>(relobj);
1023 if (ppcobj->abiversion() == 1)
1026 return !is_branch_reloc(r_type);
1030 reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target,
1031 Sized_relobj_file<size, big_endian>* object,
1032 unsigned int r_type, bool report_err);
1036 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
1037 unsigned int r_type);
1040 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
1041 unsigned int r_type, Symbol*);
1044 generate_tls_call(Symbol_table* symtab, Layout* layout,
1045 Target_powerpc* target);
1048 check_non_pic(Relobj*, unsigned int r_type);
1050 // Whether we have issued an error about a non-PIC compilation.
1051 bool issued_non_pic_error_;
1055 symval_for_branch(const Symbol_table* symtab,
1056 const Sized_symbol<size>* gsym,
1057 Powerpc_relobj<size, big_endian>* object,
1058 Address *value, unsigned int *dest_shndx);
1060 // The class which implements relocation.
1061 class Relocate : protected Track_tls
1064 // Use 'at' branch hints when true, 'y' when false.
1065 // FIXME maybe: set this with an option.
1066 static const bool is_isa_v2 = true;
1072 // Do a relocation. Return false if the caller should not issue
1073 // any warnings about this relocation.
1075 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
1076 Output_section*, size_t relnum,
1077 const elfcpp::Rela<size, big_endian>&,
1078 unsigned int r_type, const Sized_symbol<size>*,
1079 const Symbol_value<size>*,
1081 typename elfcpp::Elf_types<size>::Elf_Addr,
1085 class Relocate_comdat_behavior
1088 // Decide what the linker should do for relocations that refer to
1089 // discarded comdat sections.
1090 inline Comdat_behavior
1091 get(const char* name)
1093 gold::Default_comdat_behavior default_behavior;
1094 Comdat_behavior ret = default_behavior.get(name);
1095 if (ret == CB_WARNING)
1098 && (strcmp(name, ".fixup") == 0
1099 || strcmp(name, ".got2") == 0))
1102 && (strcmp(name, ".opd") == 0
1103 || strcmp(name, ".toc") == 0
1104 || strcmp(name, ".toc1") == 0))
1111 // A class which returns the size required for a relocation type,
1112 // used while scanning relocs during a relocatable link.
1113 class Relocatable_size_for_reloc
1117 get_size_for_reloc(unsigned int, Relobj*)
1124 // Optimize the TLS relocation type based on what we know about the
1125 // symbol. IS_FINAL is true if the final address of this symbol is
1126 // known at link time.
1128 tls::Tls_optimization
1129 optimize_tls_gd(bool is_final)
1131 // If we are generating a shared library, then we can't do anything
1133 if (parameters->options().shared())
1134 return tls::TLSOPT_NONE;
1137 return tls::TLSOPT_TO_IE;
1138 return tls::TLSOPT_TO_LE;
1141 tls::Tls_optimization
1144 if (parameters->options().shared())
1145 return tls::TLSOPT_NONE;
1147 return tls::TLSOPT_TO_LE;
1150 tls::Tls_optimization
1151 optimize_tls_ie(bool is_final)
1153 if (!is_final || parameters->options().shared())
1154 return tls::TLSOPT_NONE;
1156 return tls::TLSOPT_TO_LE;
1161 make_glink_section(Layout*);
1163 // Create the PLT section.
1165 make_plt_section(Symbol_table*, Layout*);
1168 make_iplt_section(Symbol_table*, Layout*);
1171 make_brlt_section(Layout*);
1173 // Create a PLT entry for a global symbol.
1175 make_plt_entry(Symbol_table*, Layout*, Symbol*);
1177 // Create a PLT entry for a local IFUNC symbol.
1179 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
1180 Sized_relobj_file<size, big_endian>*,
1184 // Create a GOT entry for local dynamic __tls_get_addr.
1186 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
1187 Sized_relobj_file<size, big_endian>* object);
1190 tlsld_got_offset() const
1192 return this->tlsld_got_offset_;
1195 // Get the dynamic reloc section, creating it if necessary.
1197 rela_dyn_section(Layout*);
1199 // Similarly, but for ifunc symbols get the one for ifunc.
1201 rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc);
1203 // Copy a relocation against a global symbol.
1205 copy_reloc(Symbol_table* symtab, Layout* layout,
1206 Sized_relobj_file<size, big_endian>* object,
1207 unsigned int shndx, Output_section* output_section,
1208 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
1210 unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info());
1211 this->copy_relocs_.copy_reloc(symtab, layout,
1212 symtab->get_sized_symbol<size>(sym),
1213 object, shndx, output_section,
1214 r_type, reloc.get_r_offset(),
1215 reloc.get_r_addend(),
1216 this->rela_dyn_section(layout));
1219 // Look over all the input sections, deciding where to place stubs.
1221 group_sections(Layout*, const Task*, bool);
1223 // Sort output sections by address.
1224 struct Sort_sections
1227 operator()(const Output_section* sec1, const Output_section* sec2)
1228 { return sec1->address() < sec2->address(); }
1234 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
1235 unsigned int data_shndx,
1237 unsigned int r_type,
1240 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
1241 r_type_(r_type), r_sym_(r_sym), addend_(addend)
1247 // If this branch needs a plt call stub, or a long branch stub, make one.
1249 make_stub(Stub_table<size, big_endian>*,
1250 Stub_table<size, big_endian>*,
1251 Symbol_table*) const;
1254 // The branch location..
1255 Powerpc_relobj<size, big_endian>* object_;
1256 unsigned int shndx_;
1258 // ..and the branch type and destination.
1259 unsigned int r_type_;
1260 unsigned int r_sym_;
1264 // Information about this specific target which we pass to the
1265 // general Target structure.
1266 static Target::Target_info powerpc_info;
1268 // The types of GOT entries needed for this platform.
1269 // These values are exposed to the ABI in an incremental link.
1270 // Do not renumber existing values without changing the version
1271 // number of the .gnu_incremental_inputs section.
1275 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
1276 GOT_TYPE_DTPREL, // entry for @got@dtprel
1277 GOT_TYPE_TPREL // entry for @got@tprel
1281 Output_data_got_powerpc<size, big_endian>* got_;
1282 // The PLT section. This is a container for a table of addresses,
1283 // and their relocations. Each address in the PLT has a dynamic
1284 // relocation (R_*_JMP_SLOT) and each address will have a
1285 // corresponding entry in .glink for lazy resolution of the PLT.
1286 // ppc32 initialises the PLT to point at the .glink entry, while
1287 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1288 // linker adds a stub that loads the PLT entry into ctr then
1289 // branches to ctr. There may be more than one stub for each PLT
1290 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1291 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1292 Output_data_plt_powerpc<size, big_endian>* plt_;
1293 // The IPLT section. Like plt_, this is a container for a table of
1294 // addresses and their relocations, specifically for STT_GNU_IFUNC
1295 // functions that resolve locally (STT_GNU_IFUNC functions that
1296 // don't resolve locally go in PLT). Unlike plt_, these have no
1297 // entry in .glink for lazy resolution, and the relocation section
1298 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1299 // the relocation section may contain relocations against
1300 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1301 // relocation section will appear at the end of other dynamic
1302 // relocations, so that ld.so applies these relocations after other
1303 // dynamic relocations. In a static executable, the relocation
1304 // section is emitted and marked with __rela_iplt_start and
1305 // __rela_iplt_end symbols.
1306 Output_data_plt_powerpc<size, big_endian>* iplt_;
1307 // Section holding long branch destinations.
1308 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
1309 // The .glink section.
1310 Output_data_glink<size, big_endian>* glink_;
1311 // The dynamic reloc section.
1312 Reloc_section* rela_dyn_;
1313 // Relocs saved to avoid a COPY reloc.
1314 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
1315 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1316 unsigned int tlsld_got_offset_;
1318 Stub_tables stub_tables_;
1319 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
1320 Branch_lookup_table branch_lookup_table_;
1322 typedef std::vector<Branch_info> Branches;
1323 Branches branch_info_;
1325 bool plt_thread_safe_;
1328 int relax_fail_count_;
1329 int32_t stub_group_size_;
1331 Output_data_save_res<size, big_endian> *savres_section_;
1335 Target::Target_info Target_powerpc<32, true>::powerpc_info =
1338 true, // is_big_endian
1339 elfcpp::EM_PPC, // machine_code
1340 false, // has_make_symbol
1341 false, // has_resolve
1342 false, // has_code_fill
1343 true, // is_default_stack_executable
1344 false, // can_icf_inline_merge_sections
1346 "/usr/lib/ld.so.1", // dynamic_linker
1347 0x10000000, // default_text_segment_address
1348 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1349 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1350 false, // isolate_execinstr
1352 elfcpp::SHN_UNDEF, // small_common_shndx
1353 elfcpp::SHN_UNDEF, // large_common_shndx
1354 0, // small_common_section_flags
1355 0, // large_common_section_flags
1356 NULL, // attributes_section
1357 NULL, // attributes_vendor
1358 "_start", // entry_symbol_name
1359 32, // hash_entry_size
1363 Target::Target_info Target_powerpc<32, false>::powerpc_info =
1366 false, // is_big_endian
1367 elfcpp::EM_PPC, // machine_code
1368 false, // has_make_symbol
1369 false, // has_resolve
1370 false, // has_code_fill
1371 true, // is_default_stack_executable
1372 false, // can_icf_inline_merge_sections
1374 "/usr/lib/ld.so.1", // dynamic_linker
1375 0x10000000, // default_text_segment_address
1376 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1377 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1378 false, // isolate_execinstr
1380 elfcpp::SHN_UNDEF, // small_common_shndx
1381 elfcpp::SHN_UNDEF, // large_common_shndx
1382 0, // small_common_section_flags
1383 0, // large_common_section_flags
1384 NULL, // attributes_section
1385 NULL, // attributes_vendor
1386 "_start", // entry_symbol_name
1387 32, // hash_entry_size
1391 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1394 true, // is_big_endian
1395 elfcpp::EM_PPC64, // machine_code
1396 false, // has_make_symbol
1397 false, // has_resolve
1398 false, // has_code_fill
1399 true, // is_default_stack_executable
1400 false, // can_icf_inline_merge_sections
1402 "/usr/lib/ld.so.1", // dynamic_linker
1403 0x10000000, // default_text_segment_address
1404 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1405 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1406 false, // isolate_execinstr
1408 elfcpp::SHN_UNDEF, // small_common_shndx
1409 elfcpp::SHN_UNDEF, // large_common_shndx
1410 0, // small_common_section_flags
1411 0, // large_common_section_flags
1412 NULL, // attributes_section
1413 NULL, // attributes_vendor
1414 "_start", // entry_symbol_name
1415 32, // hash_entry_size
1419 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1422 false, // is_big_endian
1423 elfcpp::EM_PPC64, // machine_code
1424 false, // has_make_symbol
1425 false, // has_resolve
1426 false, // has_code_fill
1427 true, // is_default_stack_executable
1428 false, // can_icf_inline_merge_sections
1430 "/usr/lib/ld.so.1", // dynamic_linker
1431 0x10000000, // default_text_segment_address
1432 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1433 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1434 false, // isolate_execinstr
1436 elfcpp::SHN_UNDEF, // small_common_shndx
1437 elfcpp::SHN_UNDEF, // large_common_shndx
1438 0, // small_common_section_flags
1439 0, // large_common_section_flags
1440 NULL, // attributes_section
1441 NULL, // attributes_vendor
1442 "_start", // entry_symbol_name
1443 32, // hash_entry_size
1447 is_branch_reloc(unsigned int r_type)
1449 return (r_type == elfcpp::R_POWERPC_REL24
1450 || r_type == elfcpp::R_PPC_PLTREL24
1451 || r_type == elfcpp::R_PPC_LOCAL24PC
1452 || r_type == elfcpp::R_POWERPC_REL14
1453 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1454 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1455 || r_type == elfcpp::R_POWERPC_ADDR24
1456 || r_type == elfcpp::R_POWERPC_ADDR14
1457 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1458 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1461 // If INSN is an opcode that may be used with an @tls operand, return
1462 // the transformed insn for TLS optimisation, otherwise return 0. If
1463 // REG is non-zero only match an insn with RB or RA equal to REG.
1465 at_tls_transform(uint32_t insn, unsigned int reg)
1467 if ((insn & (0x3f << 26)) != 31 << 26)
1471 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1472 rtra = insn & ((1 << 26) - (1 << 16));
1473 else if (((insn >> 16) & 0x1f) == reg)
1474 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1478 if ((insn & (0x3ff << 1)) == 266 << 1)
1481 else if ((insn & (0x1f << 1)) == 23 << 1
1482 && ((insn & (0x1f << 6)) < 14 << 6
1483 || ((insn & (0x1f << 6)) >= 16 << 6
1484 && (insn & (0x1f << 6)) < 24 << 6)))
1485 // load and store indexed -> dform
1486 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1487 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1488 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1489 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1490 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1492 insn = (58 << 26) | 2;
1500 template<int size, bool big_endian>
1501 class Powerpc_relocate_functions
1521 typedef Powerpc_relocate_functions<size, big_endian> This;
1522 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1523 typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress;
1525 template<int valsize>
1527 has_overflow_signed(Address value)
1529 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1530 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1531 limit <<= ((valsize - 1) >> 1);
1532 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1533 return value + limit > (limit << 1) - 1;
1536 template<int valsize>
1538 has_overflow_unsigned(Address value)
1540 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1541 limit <<= ((valsize - 1) >> 1);
1542 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1543 return value > (limit << 1) - 1;
1546 template<int valsize>
1548 has_overflow_bitfield(Address value)
1550 return (has_overflow_unsigned<valsize>(value)
1551 && has_overflow_signed<valsize>(value));
1554 template<int valsize>
1555 static inline Status
1556 overflowed(Address value, Overflow_check overflow)
1558 if (overflow == CHECK_SIGNED)
1560 if (has_overflow_signed<valsize>(value))
1561 return STATUS_OVERFLOW;
1563 else if (overflow == CHECK_UNSIGNED)
1565 if (has_overflow_unsigned<valsize>(value))
1566 return STATUS_OVERFLOW;
1568 else if (overflow == CHECK_BITFIELD)
1570 if (has_overflow_bitfield<valsize>(value))
1571 return STATUS_OVERFLOW;
1576 // Do a simple RELA relocation
1577 template<int fieldsize, int valsize>
1578 static inline Status
1579 rela(unsigned char* view, Address value, Overflow_check overflow)
1581 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1582 Valtype* wv = reinterpret_cast<Valtype*>(view);
1583 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value);
1584 return overflowed<valsize>(value, overflow);
1587 template<int fieldsize, int valsize>
1588 static inline Status
1589 rela(unsigned char* view,
1590 unsigned int right_shift,
1591 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1593 Overflow_check overflow)
1595 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1596 Valtype* wv = reinterpret_cast<Valtype*>(view);
1597 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv);
1598 Valtype reloc = value >> right_shift;
1601 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc);
1602 return overflowed<valsize>(value >> right_shift, overflow);
1605 // Do a simple RELA relocation, unaligned.
1606 template<int fieldsize, int valsize>
1607 static inline Status
1608 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1610 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value);
1611 return overflowed<valsize>(value, overflow);
1614 template<int fieldsize, int valsize>
1615 static inline Status
1616 rela_ua(unsigned char* view,
1617 unsigned int right_shift,
1618 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1620 Overflow_check overflow)
1622 typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype
1624 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view);
1625 Valtype reloc = value >> right_shift;
1628 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc);
1629 return overflowed<valsize>(value >> right_shift, overflow);
1633 // R_PPC64_ADDR64: (Symbol + Addend)
1635 addr64(unsigned char* view, Address value)
1636 { This::template rela<64,64>(view, value, CHECK_NONE); }
1638 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1640 addr64_u(unsigned char* view, Address value)
1641 { This::template rela_ua<64,64>(view, value, CHECK_NONE); }
1643 // R_POWERPC_ADDR32: (Symbol + Addend)
1644 static inline Status
1645 addr32(unsigned char* view, Address value, Overflow_check overflow)
1646 { return This::template rela<32,32>(view, value, overflow); }
1648 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1649 static inline Status
1650 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1651 { return This::template rela_ua<32,32>(view, value, overflow); }
1653 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1654 static inline Status
1655 addr24(unsigned char* view, Address value, Overflow_check overflow)
1657 Status stat = This::template rela<32,26>(view, 0, 0x03fffffc,
1659 if (overflow != CHECK_NONE && (value & 3) != 0)
1660 stat = STATUS_OVERFLOW;
1664 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1665 static inline Status
1666 addr16(unsigned char* view, Address value, Overflow_check overflow)
1667 { return This::template rela<16,16>(view, value, overflow); }
1669 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1670 static inline Status
1671 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1672 { return This::template rela_ua<16,16>(view, value, overflow); }
1674 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1675 static inline Status
1676 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1678 Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow);
1679 if ((value & 3) != 0)
1680 stat = STATUS_OVERFLOW;
1684 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1685 static inline Status
1686 addr16_dq(unsigned char* view, Address value, Overflow_check overflow)
1688 Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow);
1689 if ((value & 15) != 0)
1690 stat = STATUS_OVERFLOW;
1694 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1696 addr16_hi(unsigned char* view, Address value)
1697 { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); }
1699 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1701 addr16_ha(unsigned char* view, Address value)
1702 { This::addr16_hi(view, value + 0x8000); }
1704 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1706 addr16_hi2(unsigned char* view, Address value)
1707 { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); }
1709 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1711 addr16_ha2(unsigned char* view, Address value)
1712 { This::addr16_hi2(view, value + 0x8000); }
1714 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1716 addr16_hi3(unsigned char* view, Address value)
1717 { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); }
1719 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1721 addr16_ha3(unsigned char* view, Address value)
1722 { This::addr16_hi3(view, value + 0x8000); }
1724 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1725 static inline Status
1726 addr14(unsigned char* view, Address value, Overflow_check overflow)
1728 Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow);
1729 if (overflow != CHECK_NONE && (value & 3) != 0)
1730 stat = STATUS_OVERFLOW;
1734 // R_POWERPC_REL16DX_HA
1735 static inline Status
1736 addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow)
1738 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
1739 Valtype* wv = reinterpret_cast<Valtype*>(view);
1740 Valtype val = elfcpp::Swap<32, big_endian>::readval(wv);
1742 value = static_cast<SignedAddress>(value) >> 16;
1743 val |= (value & 0xffc1) | ((value & 0x3e) << 15);
1744 elfcpp::Swap<32, big_endian>::writeval(wv, val);
1745 return overflowed<16>(value, overflow);
1749 // Set ABI version for input and output.
1751 template<int size, bool big_endian>
1753 Powerpc_relobj<size, big_endian>::set_abiversion(int ver)
1755 this->e_flags_ |= ver;
1756 if (this->abiversion() != 0)
1758 Target_powerpc<size, big_endian>* target =
1759 static_cast<Target_powerpc<size, big_endian>*>(
1760 parameters->sized_target<size, big_endian>());
1761 if (target->abiversion() == 0)
1762 target->set_abiversion(this->abiversion());
1763 else if (target->abiversion() != this->abiversion())
1764 gold_error(_("%s: ABI version %d is not compatible "
1765 "with ABI version %d output"),
1766 this->name().c_str(),
1767 this->abiversion(), target->abiversion());
1772 // Stash away the index of .got2 or .opd in a relocatable object, if
1773 // such a section exists.
1775 template<int size, bool big_endian>
1777 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1778 Read_symbols_data* sd)
1780 const unsigned char* const pshdrs = sd->section_headers->data();
1781 const unsigned char* namesu = sd->section_names->data();
1782 const char* names = reinterpret_cast<const char*>(namesu);
1783 section_size_type names_size = sd->section_names_size;
1784 const unsigned char* s;
1786 s = this->template find_shdr<size, big_endian>(pshdrs,
1787 size == 32 ? ".got2" : ".opd",
1788 names, names_size, NULL);
1791 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1792 this->special_ = ndx;
1795 if (this->abiversion() == 0)
1796 this->set_abiversion(1);
1797 else if (this->abiversion() > 1)
1798 gold_error(_("%s: .opd invalid in abiv%d"),
1799 this->name().c_str(), this->abiversion());
1802 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1805 // Examine .rela.opd to build info about function entry points.
1807 template<int size, bool big_endian>
1809 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1811 const unsigned char* prelocs,
1812 const unsigned char* plocal_syms)
1816 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1818 const int reloc_size
1819 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1820 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1821 Address expected_off = 0;
1822 bool regular = true;
1823 unsigned int opd_ent_size = 0;
1825 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1827 Reltype reloc(prelocs);
1828 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1829 = reloc.get_r_info();
1830 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1831 if (r_type == elfcpp::R_PPC64_ADDR64)
1833 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1834 typename elfcpp::Elf_types<size>::Elf_Addr value;
1837 if (r_sym < this->local_symbol_count())
1839 typename elfcpp::Sym<size, big_endian>
1840 lsym(plocal_syms + r_sym * sym_size);
1841 shndx = lsym.get_st_shndx();
1842 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1843 value = lsym.get_st_value();
1846 shndx = this->symbol_section_and_value(r_sym, &value,
1848 this->set_opd_ent(reloc.get_r_offset(), shndx,
1849 value + reloc.get_r_addend());
1852 expected_off = reloc.get_r_offset();
1853 opd_ent_size = expected_off;
1855 else if (expected_off != reloc.get_r_offset())
1857 expected_off += opd_ent_size;
1859 else if (r_type == elfcpp::R_PPC64_TOC)
1861 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1866 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1867 this->name().c_str(), r_type);
1871 if (reloc_count <= 2)
1872 opd_ent_size = this->section_size(this->opd_shndx());
1873 if (opd_ent_size != 24 && opd_ent_size != 16)
1877 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1878 this->name().c_str());
1884 template<int size, bool big_endian>
1886 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1888 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1891 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1892 p != rd->relocs.end();
1895 if (p->data_shndx == this->opd_shndx())
1897 uint64_t opd_size = this->section_size(this->opd_shndx());
1898 gold_assert(opd_size == static_cast<size_t>(opd_size));
1901 this->init_opd(opd_size);
1902 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1903 rd->local_symbols->data());
1911 // Read the symbols then set up st_other vector.
1913 template<int size, bool big_endian>
1915 Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1917 this->base_read_symbols(sd);
1920 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1921 const unsigned char* const pshdrs = sd->section_headers->data();
1922 const unsigned int loccount = this->do_local_symbol_count();
1925 this->st_other_.resize(loccount);
1926 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1927 off_t locsize = loccount * sym_size;
1928 const unsigned int symtab_shndx = this->symtab_shndx();
1929 const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size;
1930 typename elfcpp::Shdr<size, big_endian> shdr(psymtab);
1931 const unsigned char* psyms = this->get_view(shdr.get_sh_offset(),
1932 locsize, true, false);
1934 for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
1936 elfcpp::Sym<size, big_endian> sym(psyms);
1937 unsigned char st_other = sym.get_st_other();
1938 this->st_other_[i] = st_other;
1939 if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
1941 if (this->abiversion() == 0)
1942 this->set_abiversion(2);
1943 else if (this->abiversion() < 2)
1944 gold_error(_("%s: local symbol %d has invalid st_other"
1945 " for ABI version 1"),
1946 this->name().c_str(), i);
1953 template<int size, bool big_endian>
1955 Powerpc_dynobj<size, big_endian>::set_abiversion(int ver)
1957 this->e_flags_ |= ver;
1958 if (this->abiversion() != 0)
1960 Target_powerpc<size, big_endian>* target =
1961 static_cast<Target_powerpc<size, big_endian>*>(
1962 parameters->sized_target<size, big_endian>());
1963 if (target->abiversion() == 0)
1964 target->set_abiversion(this->abiversion());
1965 else if (target->abiversion() != this->abiversion())
1966 gold_error(_("%s: ABI version %d is not compatible "
1967 "with ABI version %d output"),
1968 this->name().c_str(),
1969 this->abiversion(), target->abiversion());
1974 // Call Sized_dynobj::base_read_symbols to read the symbols then
1975 // read .opd from a dynamic object, filling in opd_ent_ vector,
1977 template<int size, bool big_endian>
1979 Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1981 this->base_read_symbols(sd);
1984 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1985 const unsigned char* const pshdrs = sd->section_headers->data();
1986 const unsigned char* namesu = sd->section_names->data();
1987 const char* names = reinterpret_cast<const char*>(namesu);
1988 const unsigned char* s = NULL;
1989 const unsigned char* opd;
1990 section_size_type opd_size;
1992 // Find and read .opd section.
1995 s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names,
1996 sd->section_names_size,
2001 typename elfcpp::Shdr<size, big_endian> shdr(s);
2002 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
2003 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
2005 if (this->abiversion() == 0)
2006 this->set_abiversion(1);
2007 else if (this->abiversion() > 1)
2008 gold_error(_("%s: .opd invalid in abiv%d"),
2009 this->name().c_str(), this->abiversion());
2011 this->opd_shndx_ = (s - pshdrs) / shdr_size;
2012 this->opd_address_ = shdr.get_sh_addr();
2013 opd_size = convert_to_section_size_type(shdr.get_sh_size());
2014 opd = this->get_view(shdr.get_sh_offset(), opd_size,
2020 // Build set of executable sections.
2021 // Using a set is probably overkill. There is likely to be only
2022 // a few executable sections, typically .init, .text and .fini,
2023 // and they are generally grouped together.
2024 typedef std::set<Sec_info> Exec_sections;
2025 Exec_sections exec_sections;
2027 for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size)
2029 typename elfcpp::Shdr<size, big_endian> shdr(s);
2030 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
2031 && ((shdr.get_sh_flags()
2032 & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
2033 == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
2034 && shdr.get_sh_size() != 0)
2036 exec_sections.insert(Sec_info(shdr.get_sh_addr(),
2037 shdr.get_sh_size(), i));
2040 if (exec_sections.empty())
2043 // Look over the OPD entries. This is complicated by the fact
2044 // that some binaries will use two-word entries while others
2045 // will use the standard three-word entries. In most cases
2046 // the third word (the environment pointer for languages like
2047 // Pascal) is unused and will be zero. If the third word is
2048 // used it should not be pointing into executable sections,
2050 this->init_opd(opd_size);
2051 for (const unsigned char* p = opd; p < opd + opd_size; p += 8)
2053 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype;
2054 const Valtype* valp = reinterpret_cast<const Valtype*>(p);
2055 Valtype val = elfcpp::Swap<64, big_endian>::readval(valp);
2057 // Chances are that this is the third word of an OPD entry.
2059 typename Exec_sections::const_iterator e
2060 = exec_sections.upper_bound(Sec_info(val, 0, 0));
2061 if (e != exec_sections.begin())
2064 if (e->start <= val && val < e->start + e->len)
2066 // We have an address in an executable section.
2067 // VAL ought to be the function entry, set it up.
2068 this->set_opd_ent(p - opd, e->shndx, val);
2069 // Skip second word of OPD entry, the TOC pointer.
2073 // If we didn't match any executable sections, we likely
2074 // have a non-zero third word in the OPD entry.
2079 // Set up some symbols.
2081 template<int size, bool big_endian>
2083 Target_powerpc<size, big_endian>::do_define_standard_symbols(
2084 Symbol_table* symtab,
2089 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2090 // undefined when scanning relocs (and thus requires
2091 // non-relative dynamic relocs). The proper value will be
2093 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2094 if (gotsym != NULL && gotsym->is_undefined())
2096 Target_powerpc<size, big_endian>* target =
2097 static_cast<Target_powerpc<size, big_endian>*>(
2098 parameters->sized_target<size, big_endian>());
2099 Output_data_got_powerpc<size, big_endian>* got
2100 = target->got_section(symtab, layout);
2101 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2102 Symbol_table::PREDEFINED,
2106 elfcpp::STV_HIDDEN, 0,
2110 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2111 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
2112 if (sdasym != NULL && sdasym->is_undefined())
2114 Output_data_space* sdata = new Output_data_space(4, "** sdata");
2116 = layout->add_output_section_data(".sdata", 0,
2118 | elfcpp::SHF_WRITE,
2119 sdata, ORDER_SMALL_DATA, false);
2120 symtab->define_in_output_data("_SDA_BASE_", NULL,
2121 Symbol_table::PREDEFINED,
2122 os, 32768, 0, elfcpp::STT_OBJECT,
2123 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
2129 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2130 Symbol *gotsym = symtab->lookup(".TOC.", NULL);
2131 if (gotsym != NULL && gotsym->is_undefined())
2133 Target_powerpc<size, big_endian>* target =
2134 static_cast<Target_powerpc<size, big_endian>*>(
2135 parameters->sized_target<size, big_endian>());
2136 Output_data_got_powerpc<size, big_endian>* got
2137 = target->got_section(symtab, layout);
2138 symtab->define_in_output_data(".TOC.", NULL,
2139 Symbol_table::PREDEFINED,
2143 elfcpp::STV_HIDDEN, 0,
2149 // Set up PowerPC target specific relobj.
2151 template<int size, bool big_endian>
2153 Target_powerpc<size, big_endian>::do_make_elf_object(
2154 const std::string& name,
2155 Input_file* input_file,
2156 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
2158 int et = ehdr.get_e_type();
2159 // ET_EXEC files are valid input for --just-symbols/-R,
2160 // and we treat them as relocatable objects.
2161 if (et == elfcpp::ET_REL
2162 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
2164 Powerpc_relobj<size, big_endian>* obj =
2165 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
2169 else if (et == elfcpp::ET_DYN)
2171 Powerpc_dynobj<size, big_endian>* obj =
2172 new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr);
2178 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
2183 template<int size, bool big_endian>
2184 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
2187 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
2188 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
2190 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
2191 : Output_data_got<size, big_endian>(),
2192 symtab_(symtab), layout_(layout),
2193 header_ent_cnt_(size == 32 ? 3 : 1),
2194 header_index_(size == 32 ? 0x2000 : 0)
2197 // Override all the Output_data_got methods we use so as to first call
2200 add_global(Symbol* gsym, unsigned int got_type)
2202 this->reserve_ent();
2203 return Output_data_got<size, big_endian>::add_global(gsym, got_type);
2207 add_global_plt(Symbol* gsym, unsigned int got_type)
2209 this->reserve_ent();
2210 return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type);
2214 add_global_tls(Symbol* gsym, unsigned int got_type)
2215 { return this->add_global_plt(gsym, got_type); }
2218 add_global_with_rel(Symbol* gsym, unsigned int got_type,
2219 Output_data_reloc_generic* rel_dyn, unsigned int r_type)
2221 this->reserve_ent();
2222 Output_data_got<size, big_endian>::
2223 add_global_with_rel(gsym, got_type, rel_dyn, r_type);
2227 add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
2228 Output_data_reloc_generic* rel_dyn,
2229 unsigned int r_type_1, unsigned int r_type_2)
2231 this->reserve_ent(2);
2232 Output_data_got<size, big_endian>::
2233 add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2);
2237 add_local(Relobj* object, unsigned int sym_index, unsigned int got_type)
2239 this->reserve_ent();
2240 return Output_data_got<size, big_endian>::add_local(object, sym_index,
2245 add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type)
2247 this->reserve_ent();
2248 return Output_data_got<size, big_endian>::add_local_plt(object, sym_index,
2253 add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type)
2254 { return this->add_local_plt(object, sym_index, got_type); }
2257 add_local_tls_pair(Relobj* object, unsigned int sym_index,
2258 unsigned int got_type,
2259 Output_data_reloc_generic* rel_dyn,
2260 unsigned int r_type)
2262 this->reserve_ent(2);
2263 Output_data_got<size, big_endian>::
2264 add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type);
2268 add_constant(Valtype constant)
2270 this->reserve_ent();
2271 return Output_data_got<size, big_endian>::add_constant(constant);
2275 add_constant_pair(Valtype c1, Valtype c2)
2277 this->reserve_ent(2);
2278 return Output_data_got<size, big_endian>::add_constant_pair(c1, c2);
2281 // Offset of _GLOBAL_OFFSET_TABLE_.
2285 return this->got_offset(this->header_index_);
2288 // Offset of base used to access the GOT/TOC.
2289 // The got/toc pointer reg will be set to this value.
2291 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
2294 return this->g_o_t();
2296 return (this->output_section()->address()
2297 + object->toc_base_offset()
2301 // Ensure our GOT has a header.
2303 set_final_data_size()
2305 if (this->header_ent_cnt_ != 0)
2306 this->make_header();
2307 Output_data_got<size, big_endian>::set_final_data_size();
2310 // First word of GOT header needs some values that are not
2311 // handled by Output_data_got so poke them in here.
2312 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2314 do_write(Output_file* of)
2317 if (size == 32 && this->layout_->dynamic_data() != NULL)
2318 val = this->layout_->dynamic_section()->address();
2320 val = this->output_section()->address() + 0x8000;
2321 this->replace_constant(this->header_index_, val);
2322 Output_data_got<size, big_endian>::do_write(of);
2327 reserve_ent(unsigned int cnt = 1)
2329 if (this->header_ent_cnt_ == 0)
2331 if (this->num_entries() + cnt > this->header_index_)
2332 this->make_header();
2338 this->header_ent_cnt_ = 0;
2339 this->header_index_ = this->num_entries();
2342 Output_data_got<size, big_endian>::add_constant(0);
2343 Output_data_got<size, big_endian>::add_constant(0);
2344 Output_data_got<size, big_endian>::add_constant(0);
2346 // Define _GLOBAL_OFFSET_TABLE_ at the header
2347 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2350 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
2351 sym->set_value(this->g_o_t());
2354 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2355 Symbol_table::PREDEFINED,
2356 this, this->g_o_t(), 0,
2359 elfcpp::STV_HIDDEN, 0,
2363 Output_data_got<size, big_endian>::add_constant(0);
2366 // Stashed pointers.
2367 Symbol_table* symtab_;
2371 unsigned int header_ent_cnt_;
2372 // GOT header index.
2373 unsigned int header_index_;
2376 // Get the GOT section, creating it if necessary.
2378 template<int size, bool big_endian>
2379 Output_data_got_powerpc<size, big_endian>*
2380 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
2383 if (this->got_ == NULL)
2385 gold_assert(symtab != NULL && layout != NULL);
2388 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
2390 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
2391 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2392 this->got_, ORDER_DATA, false);
2398 // Get the dynamic reloc section, creating it if necessary.
2400 template<int size, bool big_endian>
2401 typename Target_powerpc<size, big_endian>::Reloc_section*
2402 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
2404 if (this->rela_dyn_ == NULL)
2406 gold_assert(layout != NULL);
2407 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
2408 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
2409 elfcpp::SHF_ALLOC, this->rela_dyn_,
2410 ORDER_DYNAMIC_RELOCS, false);
2412 return this->rela_dyn_;
2415 // Similarly, but for ifunc symbols get the one for ifunc.
2417 template<int size, bool big_endian>
2418 typename Target_powerpc<size, big_endian>::Reloc_section*
2419 Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
2424 return this->rela_dyn_section(layout);
2426 if (this->iplt_ == NULL)
2427 this->make_iplt_section(symtab, layout);
2428 return this->iplt_->rel_plt();
2434 // Determine the stub group size. The group size is the absolute
2435 // value of the parameter --stub-group-size. If --stub-group-size
2436 // is passed a negative value, we restrict stubs to be always before
2437 // the stubbed branches.
2438 Stub_control(int32_t size, bool no_size_errors)
2439 : state_(NO_GROUP), stub_group_size_(abs(size)),
2440 stub14_group_size_(abs(size) >> 10),
2441 stubs_always_before_branch_(size < 0),
2442 suppress_size_errors_(no_size_errors),
2443 group_end_addr_(0), owner_(NULL), output_section_(NULL)
2447 // Return true iff input section can be handled by current stub
2450 can_add_to_stub_group(Output_section* o,
2451 const Output_section::Input_section* i,
2454 const Output_section::Input_section*
2460 { return output_section_; }
2463 set_output_and_owner(Output_section* o,
2464 const Output_section::Input_section* i)
2466 this->output_section_ = o;
2474 FINDING_STUB_SECTION,
2479 uint32_t stub_group_size_;
2480 uint32_t stub14_group_size_;
2481 bool stubs_always_before_branch_;
2482 bool suppress_size_errors_;
2483 uint64_t group_end_addr_;
2484 const Output_section::Input_section* owner_;
2485 Output_section* output_section_;
2488 // Return true iff input section can be handled by current stub
2492 Stub_control::can_add_to_stub_group(Output_section* o,
2493 const Output_section::Input_section* i,
2497 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
2498 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
2500 uint64_t start_addr = o->address();
2503 // .init and .fini sections are pasted together to form a single
2504 // function. We can't be adding stubs in the middle of the function.
2505 this_size = o->data_size();
2508 start_addr += i->relobj()->output_section_offset(i->shndx());
2509 this_size = i->data_size();
2511 uint64_t end_addr = start_addr + this_size;
2512 bool toobig = this_size > group_size;
2514 if (toobig && !this->suppress_size_errors_)
2515 gold_warning(_("%s:%s exceeds group size"),
2516 i->relobj()->name().c_str(),
2517 i->relobj()->section_name(i->shndx()).c_str());
2519 if (this->state_ != HAS_STUB_SECTION
2520 && (!whole_sec || this->output_section_ != o)
2521 && (this->state_ == NO_GROUP
2522 || this->group_end_addr_ - end_addr < group_size))
2525 this->output_section_ = o;
2528 if (this->state_ == NO_GROUP)
2530 this->state_ = FINDING_STUB_SECTION;
2531 this->group_end_addr_ = end_addr;
2533 else if (this->group_end_addr_ - start_addr < group_size)
2535 // Adding this section would make the group larger than GROUP_SIZE.
2536 else if (this->state_ == FINDING_STUB_SECTION
2537 && !this->stubs_always_before_branch_
2540 // But wait, there's more! Input sections up to GROUP_SIZE
2541 // bytes before the stub table can be handled by it too.
2542 this->state_ = HAS_STUB_SECTION;
2543 this->group_end_addr_ = end_addr;
2547 this->state_ = NO_GROUP;
2553 // Look over all the input sections, deciding where to place stubs.
2555 template<int size, bool big_endian>
2557 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
2559 bool no_size_errors)
2561 Stub_control stub_control(this->stub_group_size_, no_size_errors);
2563 // Group input sections and insert stub table
2564 Stub_table_owner* table_owner = NULL;
2565 std::vector<Stub_table_owner*> tables;
2566 Layout::Section_list section_list;
2567 layout->get_executable_sections(§ion_list);
2568 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
2569 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
2570 o != section_list.rend();
2573 typedef Output_section::Input_section_list Input_section_list;
2574 for (Input_section_list::const_reverse_iterator i
2575 = (*o)->input_sections().rbegin();
2576 i != (*o)->input_sections().rend();
2579 if (i->is_input_section()
2580 || i->is_relaxed_input_section())
2582 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2583 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2584 bool has14 = ppcobj->has_14bit_branch(i->shndx());
2585 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
2587 table_owner->output_section = stub_control.output_section();
2588 table_owner->owner = stub_control.owner();
2589 stub_control.set_output_and_owner(*o, &*i);
2592 if (table_owner == NULL)
2594 table_owner = new Stub_table_owner;
2595 tables.push_back(table_owner);
2597 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2601 if (table_owner != NULL)
2603 const Output_section::Input_section* i = stub_control.owner();
2605 if (tables.size() >= 2 && tables[tables.size() - 2]->owner == i)
2607 // Corner case. A new stub group was made for the first
2608 // section (last one looked at here) for some reason, but
2609 // the first section is already being used as the owner for
2610 // a stub table for following sections. Force it into that
2614 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2615 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2616 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2620 table_owner->output_section = stub_control.output_section();
2621 table_owner->owner = i;
2624 for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin();
2628 Stub_table<size, big_endian>* stub_table;
2630 if ((*t)->owner->is_input_section())
2631 stub_table = new Stub_table<size, big_endian>(this,
2632 (*t)->output_section,
2634 else if ((*t)->owner->is_relaxed_input_section())
2635 stub_table = static_cast<Stub_table<size, big_endian>*>(
2636 (*t)->owner->relaxed_input_section());
2639 this->stub_tables_.push_back(stub_table);
2644 static unsigned long
2645 max_branch_delta (unsigned int r_type)
2647 if (r_type == elfcpp::R_POWERPC_REL14
2648 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
2649 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2651 if (r_type == elfcpp::R_POWERPC_REL24
2652 || r_type == elfcpp::R_PPC_PLTREL24
2653 || r_type == elfcpp::R_PPC_LOCAL24PC)
2658 // If this branch needs a plt call stub, or a long branch stub, make one.
2660 template<int size, bool big_endian>
2662 Target_powerpc<size, big_endian>::Branch_info::make_stub(
2663 Stub_table<size, big_endian>* stub_table,
2664 Stub_table<size, big_endian>* ifunc_stub_table,
2665 Symbol_table* symtab) const
2667 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2668 if (sym != NULL && sym->is_forwarder())
2669 sym = symtab->resolve_forwards(sym);
2670 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2671 Target_powerpc<size, big_endian>* target =
2672 static_cast<Target_powerpc<size, big_endian>*>(
2673 parameters->sized_target<size, big_endian>());
2675 ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
2676 : this->object_->local_has_plt_offset(this->r_sym_))
2680 && target->abiversion() >= 2
2681 && !parameters->options().output_is_position_independent()
2682 && !is_branch_reloc(this->r_type_))
2683 target->glink_section()->add_global_entry(gsym);
2686 if (stub_table == NULL)
2687 stub_table = this->object_->stub_table(this->shndx_);
2688 if (stub_table == NULL)
2690 // This is a ref from a data section to an ifunc symbol.
2691 stub_table = ifunc_stub_table;
2693 gold_assert(stub_table != NULL);
2694 Address from = this->object_->get_output_section_offset(this->shndx_);
2695 if (from != invalid_address)
2696 from += (this->object_->output_section(this->shndx_)->address()
2699 return stub_table->add_plt_call_entry(from,
2700 this->object_, gsym,
2701 this->r_type_, this->addend_);
2703 return stub_table->add_plt_call_entry(from,
2704 this->object_, this->r_sym_,
2705 this->r_type_, this->addend_);
2710 Address max_branch_offset = max_branch_delta(this->r_type_);
2711 if (max_branch_offset == 0)
2713 Address from = this->object_->get_output_section_offset(this->shndx_);
2714 gold_assert(from != invalid_address);
2715 from += (this->object_->output_section(this->shndx_)->address()
2720 switch (gsym->source())
2722 case Symbol::FROM_OBJECT:
2724 Object* symobj = gsym->object();
2725 if (symobj->is_dynamic()
2726 || symobj->pluginobj() != NULL)
2729 unsigned int shndx = gsym->shndx(&is_ordinary);
2730 if (shndx == elfcpp::SHN_UNDEF)
2735 case Symbol::IS_UNDEFINED:
2741 Symbol_table::Compute_final_value_status status;
2742 to = symtab->compute_final_value<size>(gsym, &status);
2743 if (status != Symbol_table::CFVS_OK)
2746 to += this->object_->ppc64_local_entry_offset(gsym);
2750 const Symbol_value<size>* psymval
2751 = this->object_->local_symbol(this->r_sym_);
2752 Symbol_value<size> symval;
2753 typedef Sized_relobj_file<size, big_endian> ObjType;
2754 typename ObjType::Compute_final_local_value_status status
2755 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2757 if (status != ObjType::CFLV_OK
2758 || !symval.has_output_value())
2760 to = symval.value(this->object_, 0);
2762 to += this->object_->ppc64_local_entry_offset(this->r_sym_);
2764 if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24))
2765 to += this->addend_;
2766 if (stub_table == NULL)
2767 stub_table = this->object_->stub_table(this->shndx_);
2768 if (size == 64 && target->abiversion() < 2)
2770 unsigned int dest_shndx;
2771 if (!target->symval_for_branch(symtab, gsym, this->object_,
2775 Address delta = to - from;
2776 if (delta + max_branch_offset >= 2 * max_branch_offset)
2778 if (stub_table == NULL)
2780 gold_warning(_("%s:%s: branch in non-executable section,"
2781 " no long branch stub for you"),
2782 this->object_->name().c_str(),
2783 this->object_->section_name(this->shndx_).c_str());
2786 bool save_res = (size == 64
2788 && gsym->source() == Symbol::IN_OUTPUT_DATA
2789 && gsym->output_data() == target->savres_section());
2790 return stub_table->add_long_branch_entry(this->object_,
2792 from, to, save_res);
2798 // Relaxation hook. This is where we do stub generation.
2800 template<int size, bool big_endian>
2802 Target_powerpc<size, big_endian>::do_relax(int pass,
2803 const Input_objects*,
2804 Symbol_table* symtab,
2808 unsigned int prev_brlt_size = 0;
2812 = this->abiversion() < 2 && parameters->options().plt_thread_safe();
2814 && this->abiversion() < 2
2816 && !parameters->options().user_set_plt_thread_safe())
2818 static const char* const thread_starter[] =
2822 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2824 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2825 "mq_notify", "create_timer",
2830 "GOMP_parallel_start",
2831 "GOMP_parallel_loop_static",
2832 "GOMP_parallel_loop_static_start",
2833 "GOMP_parallel_loop_dynamic",
2834 "GOMP_parallel_loop_dynamic_start",
2835 "GOMP_parallel_loop_guided",
2836 "GOMP_parallel_loop_guided_start",
2837 "GOMP_parallel_loop_runtime",
2838 "GOMP_parallel_loop_runtime_start",
2839 "GOMP_parallel_sections",
2840 "GOMP_parallel_sections_start",
2845 if (parameters->options().shared())
2849 for (unsigned int i = 0;
2850 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2853 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2854 thread_safe = (sym != NULL
2856 && sym->in_real_elf());
2862 this->plt_thread_safe_ = thread_safe;
2867 this->stub_group_size_ = parameters->options().stub_group_size();
2868 bool no_size_errors = true;
2869 if (this->stub_group_size_ == 1)
2870 this->stub_group_size_ = 0x1c00000;
2871 else if (this->stub_group_size_ == -1)
2872 this->stub_group_size_ = -0x1e00000;
2874 no_size_errors = false;
2875 this->group_sections(layout, task, no_size_errors);
2877 else if (this->relax_failed_ && this->relax_fail_count_ < 3)
2879 this->branch_lookup_table_.clear();
2880 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2881 p != this->stub_tables_.end();
2884 (*p)->clear_stubs(true);
2886 this->stub_tables_.clear();
2887 this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
2888 gold_info(_("%s: stub group size is too large; retrying with %d"),
2889 program_name, this->stub_group_size_);
2890 this->group_sections(layout, task, true);
2893 // We need address of stub tables valid for make_stub.
2894 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2895 p != this->stub_tables_.end();
2898 const Powerpc_relobj<size, big_endian>* object
2899 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2900 Address off = object->get_output_section_offset((*p)->shndx());
2901 gold_assert(off != invalid_address);
2902 Output_section* os = (*p)->output_section();
2903 (*p)->set_address_and_size(os, off);
2908 // Clear plt call stubs, long branch stubs and branch lookup table.
2909 prev_brlt_size = this->branch_lookup_table_.size();
2910 this->branch_lookup_table_.clear();
2911 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2912 p != this->stub_tables_.end();
2915 (*p)->clear_stubs(false);
2919 // Build all the stubs.
2920 this->relax_failed_ = false;
2921 Stub_table<size, big_endian>* ifunc_stub_table
2922 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2923 Stub_table<size, big_endian>* one_stub_table
2924 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2925 for (typename Branches::const_iterator b = this->branch_info_.begin();
2926 b != this->branch_info_.end();
2929 if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
2930 && !this->relax_failed_)
2932 this->relax_failed_ = true;
2933 this->relax_fail_count_++;
2934 if (this->relax_fail_count_ < 3)
2939 // Did anything change size?
2940 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2941 bool again = num_huge_branches != prev_brlt_size;
2942 if (size == 64 && num_huge_branches != 0)
2943 this->make_brlt_section(layout);
2944 if (size == 64 && again)
2945 this->brlt_section_->set_current_size(num_huge_branches);
2947 typedef Unordered_set<Output_section*> Output_sections;
2948 Output_sections os_need_update;
2949 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2950 p != this->stub_tables_.end();
2953 if ((*p)->size_update())
2956 (*p)->add_eh_frame(layout);
2957 os_need_update.insert((*p)->output_section());
2961 // Set output section offsets for all input sections in an output
2962 // section that just changed size. Anything past the stubs will
2964 for (typename Output_sections::iterator p = os_need_update.begin();
2965 p != os_need_update.end();
2968 Output_section* os = *p;
2970 typedef Output_section::Input_section_list Input_section_list;
2971 for (Input_section_list::const_iterator i = os->input_sections().begin();
2972 i != os->input_sections().end();
2975 off = align_address(off, i->addralign());
2976 if (i->is_input_section() || i->is_relaxed_input_section())
2977 i->relobj()->set_section_offset(i->shndx(), off);
2978 if (i->is_relaxed_input_section())
2980 Stub_table<size, big_endian>* stub_table
2981 = static_cast<Stub_table<size, big_endian>*>(
2982 i->relaxed_input_section());
2983 off += stub_table->set_address_and_size(os, off);
2986 off += i->data_size();
2988 // If .branch_lt is part of this output section, then we have
2989 // just done the offset adjustment.
2990 os->clear_section_offsets_need_adjustment();
2995 && num_huge_branches != 0
2996 && parameters->options().output_is_position_independent())
2998 // Fill in the BRLT relocs.
2999 this->brlt_section_->reset_brlt_sizes();
3000 for (typename Branch_lookup_table::const_iterator p
3001 = this->branch_lookup_table_.begin();
3002 p != this->branch_lookup_table_.end();
3005 this->brlt_section_->add_reloc(p->first, p->second);
3007 this->brlt_section_->finalize_brlt_sizes();
3012 template<int size, bool big_endian>
3014 Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
3015 unsigned char* oview,
3019 uint64_t address = plt->address();
3020 off_t len = plt->data_size();
3022 if (plt == this->glink_)
3024 // See Output_data_glink::do_write() for glink contents.
3027 gold_assert(parameters->doing_static_link());
3028 // Static linking may need stubs, to support ifunc and long
3029 // branches. We need to create an output section for
3030 // .eh_frame early in the link process, to have a place to
3031 // attach stub .eh_frame info. We also need to have
3032 // registered a CIE that matches the stub CIE. Both of
3033 // these requirements are satisfied by creating an FDE and
3034 // CIE for .glink, even though static linking will leave
3035 // .glink zero length.
3036 // ??? Hopefully generating an FDE with a zero address range
3037 // won't confuse anything that consumes .eh_frame info.
3039 else if (size == 64)
3041 // There is one word before __glink_PLTresolve
3045 else if (parameters->options().output_is_position_independent())
3047 // There are two FDEs for a position independent glink.
3048 // The first covers the branch table, the second
3049 // __glink_PLTresolve at the end of glink.
3050 off_t resolve_size = this->glink_->pltresolve_size;
3051 if (oview[9] == elfcpp::DW_CFA_nop)
3052 len -= resolve_size;
3055 address += len - resolve_size;
3062 // Must be a stub table.
3063 const Stub_table<size, big_endian>* stub_table
3064 = static_cast<const Stub_table<size, big_endian>*>(plt);
3065 uint64_t stub_address = stub_table->stub_address();
3066 len -= stub_address - address;
3067 address = stub_address;
3070 *paddress = address;
3074 // A class to handle the PLT data.
3076 template<int size, bool big_endian>
3077 class Output_data_plt_powerpc : public Output_section_data_build
3080 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3081 size, big_endian> Reloc_section;
3083 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
3084 Reloc_section* plt_rel,
3086 : Output_section_data_build(size == 32 ? 4 : 8),
3092 // Add an entry to the PLT.
3097 add_ifunc_entry(Symbol*);
3100 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
3102 // Return the .rela.plt section data.
3109 // Return the number of PLT entries.
3113 if (this->current_data_size() == 0)
3115 return ((this->current_data_size() - this->first_plt_entry_offset())
3116 / this->plt_entry_size());
3121 do_adjust_output_section(Output_section* os)
3126 // Write to a map file.
3128 do_print_to_mapfile(Mapfile* mapfile) const
3129 { mapfile->print_output_data(this, this->name_); }
3132 // Return the offset of the first non-reserved PLT entry.
3134 first_plt_entry_offset() const
3136 // IPLT has no reserved entry.
3137 if (this->name_[3] == 'I')
3139 return this->targ_->first_plt_entry_offset();
3142 // Return the size of each PLT entry.
3144 plt_entry_size() const
3146 return this->targ_->plt_entry_size();
3149 // Write out the PLT data.
3151 do_write(Output_file*);
3153 // The reloc section.
3154 Reloc_section* rel_;
3155 // Allows access to .glink for do_write.
3156 Target_powerpc<size, big_endian>* targ_;
3157 // What to report in map file.
3161 // Add an entry to the PLT.
3163 template<int size, bool big_endian>
3165 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
3167 if (!gsym->has_plt_offset())
3169 section_size_type off = this->current_data_size();
3171 off += this->first_plt_entry_offset();
3172 gsym->set_plt_offset(off);
3173 gsym->set_needs_dynsym_entry();
3174 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
3175 this->rel_->add_global(gsym, dynrel, this, off, 0);
3176 off += this->plt_entry_size();
3177 this->set_current_data_size(off);
3181 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3183 template<int size, bool big_endian>
3185 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
3187 if (!gsym->has_plt_offset())
3189 section_size_type off = this->current_data_size();
3190 gsym->set_plt_offset(off);
3191 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3192 if (size == 64 && this->targ_->abiversion() < 2)
3193 dynrel = elfcpp::R_PPC64_JMP_IREL;
3194 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
3195 off += this->plt_entry_size();
3196 this->set_current_data_size(off);
3200 // Add an entry for a local ifunc symbol to the IPLT.
3202 template<int size, bool big_endian>
3204 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
3205 Sized_relobj_file<size, big_endian>* relobj,
3206 unsigned int local_sym_index)
3208 if (!relobj->local_has_plt_offset(local_sym_index))
3210 section_size_type off = this->current_data_size();
3211 relobj->set_local_plt_offset(local_sym_index, off);
3212 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3213 if (size == 64 && this->targ_->abiversion() < 2)
3214 dynrel = elfcpp::R_PPC64_JMP_IREL;
3215 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
3217 off += this->plt_entry_size();
3218 this->set_current_data_size(off);
3222 static const uint32_t add_0_11_11 = 0x7c0b5a14;
3223 static const uint32_t add_2_2_11 = 0x7c425a14;
3224 static const uint32_t add_3_3_2 = 0x7c631214;
3225 static const uint32_t add_3_3_13 = 0x7c636a14;
3226 static const uint32_t add_11_0_11 = 0x7d605a14;
3227 static const uint32_t add_11_2_11 = 0x7d625a14;
3228 static const uint32_t add_11_11_2 = 0x7d6b1214;
3229 static const uint32_t addi_0_12 = 0x380c0000;
3230 static const uint32_t addi_2_2 = 0x38420000;
3231 static const uint32_t addi_3_3 = 0x38630000;
3232 static const uint32_t addi_11_11 = 0x396b0000;
3233 static const uint32_t addi_12_1 = 0x39810000;
3234 static const uint32_t addi_12_12 = 0x398c0000;
3235 static const uint32_t addis_0_2 = 0x3c020000;
3236 static const uint32_t addis_0_13 = 0x3c0d0000;
3237 static const uint32_t addis_2_12 = 0x3c4c0000;
3238 static const uint32_t addis_11_2 = 0x3d620000;
3239 static const uint32_t addis_11_11 = 0x3d6b0000;
3240 static const uint32_t addis_11_30 = 0x3d7e0000;
3241 static const uint32_t addis_12_1 = 0x3d810000;
3242 static const uint32_t addis_12_2 = 0x3d820000;
3243 static const uint32_t addis_12_12 = 0x3d8c0000;
3244 static const uint32_t b = 0x48000000;
3245 static const uint32_t bcl_20_31 = 0x429f0005;
3246 static const uint32_t bctr = 0x4e800420;
3247 static const uint32_t blr = 0x4e800020;
3248 static const uint32_t bnectr_p4 = 0x4ce20420;
3249 static const uint32_t cmpld_7_12_0 = 0x7fac0040;
3250 static const uint32_t cmpldi_2_0 = 0x28220000;
3251 static const uint32_t cror_15_15_15 = 0x4def7b82;
3252 static const uint32_t cror_31_31_31 = 0x4ffffb82;
3253 static const uint32_t ld_0_1 = 0xe8010000;
3254 static const uint32_t ld_0_12 = 0xe80c0000;
3255 static const uint32_t ld_2_1 = 0xe8410000;
3256 static const uint32_t ld_2_2 = 0xe8420000;
3257 static const uint32_t ld_2_11 = 0xe84b0000;
3258 static const uint32_t ld_11_2 = 0xe9620000;
3259 static const uint32_t ld_11_11 = 0xe96b0000;
3260 static const uint32_t ld_12_2 = 0xe9820000;
3261 static const uint32_t ld_12_11 = 0xe98b0000;
3262 static const uint32_t ld_12_12 = 0xe98c0000;
3263 static const uint32_t lfd_0_1 = 0xc8010000;
3264 static const uint32_t li_0_0 = 0x38000000;
3265 static const uint32_t li_12_0 = 0x39800000;
3266 static const uint32_t lis_0 = 0x3c000000;
3267 static const uint32_t lis_11 = 0x3d600000;
3268 static const uint32_t lis_12 = 0x3d800000;
3269 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
3270 static const uint32_t lwz_0_12 = 0x800c0000;
3271 static const uint32_t lwz_11_11 = 0x816b0000;
3272 static const uint32_t lwz_11_30 = 0x817e0000;
3273 static const uint32_t lwz_12_12 = 0x818c0000;
3274 static const uint32_t lwzu_0_12 = 0x840c0000;
3275 static const uint32_t mflr_0 = 0x7c0802a6;
3276 static const uint32_t mflr_11 = 0x7d6802a6;
3277 static const uint32_t mflr_12 = 0x7d8802a6;
3278 static const uint32_t mtctr_0 = 0x7c0903a6;
3279 static const uint32_t mtctr_11 = 0x7d6903a6;
3280 static const uint32_t mtctr_12 = 0x7d8903a6;
3281 static const uint32_t mtlr_0 = 0x7c0803a6;
3282 static const uint32_t mtlr_12 = 0x7d8803a6;
3283 static const uint32_t nop = 0x60000000;
3284 static const uint32_t ori_0_0_0 = 0x60000000;
3285 static const uint32_t srdi_0_0_2 = 0x7800f082;
3286 static const uint32_t std_0_1 = 0xf8010000;
3287 static const uint32_t std_0_12 = 0xf80c0000;
3288 static const uint32_t std_2_1 = 0xf8410000;
3289 static const uint32_t stfd_0_1 = 0xd8010000;
3290 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
3291 static const uint32_t sub_11_11_12 = 0x7d6c5850;
3292 static const uint32_t sub_12_12_11 = 0x7d8b6050;
3293 static const uint32_t xor_2_12_12 = 0x7d826278;
3294 static const uint32_t xor_11_12_12 = 0x7d8b6278;
3296 // Write out the PLT.
3298 template<int size, bool big_endian>
3300 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
3302 if (size == 32 && this->name_[3] != 'I')
3304 const section_size_type offset = this->offset();
3305 const section_size_type oview_size
3306 = convert_to_section_size_type(this->data_size());
3307 unsigned char* const oview = of->get_output_view(offset, oview_size);
3308 unsigned char* pov = oview;
3309 unsigned char* endpov = oview + oview_size;
3311 // The address of the .glink branch table
3312 const Output_data_glink<size, big_endian>* glink
3313 = this->targ_->glink_section();
3314 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
3316 while (pov < endpov)
3318 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
3323 of->write_output_view(offset, oview_size, oview);
3327 // Create the PLT section.
3329 template<int size, bool big_endian>
3331 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
3334 if (this->plt_ == NULL)
3336 if (this->got_ == NULL)
3337 this->got_section(symtab, layout);
3339 if (this->glink_ == NULL)
3340 make_glink_section(layout);
3342 // Ensure that .rela.dyn always appears before .rela.plt This is
3343 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3344 // needs to include .rela.plt in its range.
3345 this->rela_dyn_section(layout);
3347 Reloc_section* plt_rel = new Reloc_section(false);
3348 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
3349 elfcpp::SHF_ALLOC, plt_rel,
3350 ORDER_DYNAMIC_PLT_RELOCS, false);
3352 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
3354 layout->add_output_section_data(".plt",
3356 ? elfcpp::SHT_PROGBITS
3357 : elfcpp::SHT_NOBITS),
3358 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3367 // Create the IPLT section.
3369 template<int size, bool big_endian>
3371 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
3374 if (this->iplt_ == NULL)
3376 this->make_plt_section(symtab, layout);
3378 Reloc_section* iplt_rel = new Reloc_section(false);
3379 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
3381 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
3383 this->plt_->output_section()->add_output_section_data(this->iplt_);
3387 // A section for huge long branch addresses, similar to plt section.
3389 template<int size, bool big_endian>
3390 class Output_data_brlt_powerpc : public Output_section_data_build
3393 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3394 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3395 size, big_endian> Reloc_section;
3397 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
3398 Reloc_section* brlt_rel)
3399 : Output_section_data_build(size == 32 ? 4 : 8),
3407 this->reset_data_size();
3408 this->rel_->reset_data_size();
3412 finalize_brlt_sizes()
3414 this->finalize_data_size();
3415 this->rel_->finalize_data_size();
3418 // Add a reloc for an entry in the BRLT.
3420 add_reloc(Address to, unsigned int off)
3421 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
3423 // Update section and reloc section size.
3425 set_current_size(unsigned int num_branches)
3427 this->reset_address_and_file_offset();
3428 this->set_current_data_size(num_branches * 16);
3429 this->finalize_data_size();
3430 Output_section* os = this->output_section();
3431 os->set_section_offsets_need_adjustment();
3432 if (this->rel_ != NULL)
3434 unsigned int reloc_size
3435 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
3436 this->rel_->reset_address_and_file_offset();
3437 this->rel_->set_current_data_size(num_branches * reloc_size);
3438 this->rel_->finalize_data_size();
3439 Output_section* os = this->rel_->output_section();
3440 os->set_section_offsets_need_adjustment();
3446 do_adjust_output_section(Output_section* os)
3451 // Write to a map file.
3453 do_print_to_mapfile(Mapfile* mapfile) const
3454 { mapfile->print_output_data(this, "** BRLT"); }
3457 // Write out the BRLT data.
3459 do_write(Output_file*);
3461 // The reloc section.
3462 Reloc_section* rel_;
3463 Target_powerpc<size, big_endian>* targ_;
3466 // Make the branch lookup table section.
3468 template<int size, bool big_endian>
3470 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
3472 if (size == 64 && this->brlt_section_ == NULL)
3474 Reloc_section* brlt_rel = NULL;
3475 bool is_pic = parameters->options().output_is_position_independent();
3478 // When PIC we can't fill in .branch_lt (like .plt it can be
3479 // a bss style section) but must initialise at runtime via
3480 // dynamic relocats.
3481 this->rela_dyn_section(layout);
3482 brlt_rel = new Reloc_section(false);
3483 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
3486 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
3487 if (this->plt_ && is_pic)
3488 this->plt_->output_section()
3489 ->add_output_section_data(this->brlt_section_);
3491 layout->add_output_section_data(".branch_lt",
3492 (is_pic ? elfcpp::SHT_NOBITS
3493 : elfcpp::SHT_PROGBITS),
3494 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3495 this->brlt_section_,
3496 (is_pic ? ORDER_SMALL_BSS
3497 : ORDER_SMALL_DATA),
3502 // Write out .branch_lt when non-PIC.
3504 template<int size, bool big_endian>
3506 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
3508 if (size == 64 && !parameters->options().output_is_position_independent())
3510 const section_size_type offset = this->offset();
3511 const section_size_type oview_size
3512 = convert_to_section_size_type(this->data_size());
3513 unsigned char* const oview = of->get_output_view(offset, oview_size);
3515 this->targ_->write_branch_lookup_table(oview);
3516 of->write_output_view(offset, oview_size, oview);
3520 static inline uint32_t
3526 static inline uint32_t
3532 static inline uint32_t
3535 return hi(a + 0x8000);
3541 static const unsigned char eh_frame_cie[12];
3545 const unsigned char Eh_cie<size>::eh_frame_cie[] =
3548 'z', 'R', 0, // Augmentation string.
3549 4, // Code alignment.
3550 0x80 - size / 8 , // Data alignment.
3552 1, // Augmentation size.
3553 (elfcpp::DW_EH_PE_pcrel
3554 | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
3555 elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
3558 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3559 static const unsigned char glink_eh_frame_fde_64v1[] =
3561 0, 0, 0, 0, // Replaced with offset to .glink.
3562 0, 0, 0, 0, // Replaced with size of .glink.
3563 0, // Augmentation size.
3564 elfcpp::DW_CFA_advance_loc + 1,
3565 elfcpp::DW_CFA_register, 65, 12,
3566 elfcpp::DW_CFA_advance_loc + 4,
3567 elfcpp::DW_CFA_restore_extended, 65
3570 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3571 static const unsigned char glink_eh_frame_fde_64v2[] =
3573 0, 0, 0, 0, // Replaced with offset to .glink.
3574 0, 0, 0, 0, // Replaced with size of .glink.
3575 0, // Augmentation size.
3576 elfcpp::DW_CFA_advance_loc + 1,
3577 elfcpp::DW_CFA_register, 65, 0,
3578 elfcpp::DW_CFA_advance_loc + 4,
3579 elfcpp::DW_CFA_restore_extended, 65
3582 // Describe __glink_PLTresolve use of LR, 32-bit version.
3583 static const unsigned char glink_eh_frame_fde_32[] =
3585 0, 0, 0, 0, // Replaced with offset to .glink.
3586 0, 0, 0, 0, // Replaced with size of .glink.
3587 0, // Augmentation size.
3588 elfcpp::DW_CFA_advance_loc + 2,
3589 elfcpp::DW_CFA_register, 65, 0,
3590 elfcpp::DW_CFA_advance_loc + 4,
3591 elfcpp::DW_CFA_restore_extended, 65
3594 static const unsigned char default_fde[] =
3596 0, 0, 0, 0, // Replaced with offset to stubs.
3597 0, 0, 0, 0, // Replaced with size of stubs.
3598 0, // Augmentation size.
3599 elfcpp::DW_CFA_nop, // Pad.
3604 template<bool big_endian>
3606 write_insn(unsigned char* p, uint32_t v)
3608 elfcpp::Swap<32, big_endian>::writeval(p, v);
3611 // Stub_table holds information about plt and long branch stubs.
3612 // Stubs are built in an area following some input section determined
3613 // by group_sections(). This input section is converted to a relaxed
3614 // input section allowing it to be resized to accommodate the stubs
3616 template<int size, bool big_endian>
3617 class Stub_table : public Output_relaxed_input_section
3620 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3621 static const Address invalid_address = static_cast<Address>(0) - 1;
3623 Stub_table(Target_powerpc<size, big_endian>* targ,
3624 Output_section* output_section,
3625 const Output_section::Input_section* owner)
3626 : Output_relaxed_input_section(owner->relobj(), owner->shndx(),
3628 ->section_addralign(owner->shndx())),
3629 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
3630 orig_data_size_(owner->current_data_size()),
3631 plt_size_(0), last_plt_size_(0),
3632 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3633 need_save_res_(false)
3635 this->set_output_section(output_section);
3637 std::vector<Output_relaxed_input_section*> new_relaxed;
3638 new_relaxed.push_back(this);
3639 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3642 // Add a plt call stub.
3644 add_plt_call_entry(Address,
3645 const Sized_relobj_file<size, big_endian>*,
3651 add_plt_call_entry(Address,
3652 const Sized_relobj_file<size, big_endian>*,
3657 // Find a given plt call stub.
3659 find_plt_call_entry(const Symbol*) const;
3662 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3663 unsigned int) const;
3666 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3672 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3677 // Add a long branch stub.
3679 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3680 unsigned int, Address, Address, bool);
3683 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3687 can_reach_stub(Address from, unsigned int off, unsigned int r_type)
3689 Address max_branch_offset = max_branch_delta(r_type);
3690 if (max_branch_offset == 0)
3692 gold_assert(from != invalid_address);
3693 Address loc = off + this->stub_address();
3694 return loc - from + max_branch_offset < 2 * max_branch_offset;
3698 clear_stubs(bool all)
3700 this->plt_call_stubs_.clear();
3701 this->plt_size_ = 0;
3702 this->long_branch_stubs_.clear();
3703 this->branch_size_ = 0;
3704 this->need_save_res_ = false;
3707 this->last_plt_size_ = 0;
3708 this->last_branch_size_ = 0;
3713 set_address_and_size(const Output_section* os, Address off)
3715 Address start_off = off;
3716 off += this->orig_data_size_;
3717 Address my_size = this->plt_size_ + this->branch_size_;
3718 if (this->need_save_res_)
3719 my_size += this->targ_->savres_section()->data_size();
3721 off = align_address(off, this->stub_align());
3722 // Include original section size and alignment padding in size
3723 my_size += off - start_off;
3724 this->reset_address_and_file_offset();
3725 this->set_current_data_size(my_size);
3726 this->set_address_and_file_offset(os->address() + start_off,
3727 os->offset() + start_off);
3732 stub_address() const
3734 return align_address(this->address() + this->orig_data_size_,
3735 this->stub_align());
3741 return align_address(this->offset() + this->orig_data_size_,
3742 this->stub_align());
3747 { return this->plt_size_; }
3752 Output_section* os = this->output_section();
3753 if (os->addralign() < this->stub_align())
3755 os->set_addralign(this->stub_align());
3756 // FIXME: get rid of the insane checkpointing.
3757 // We can't increase alignment of the input section to which
3758 // stubs are attached; The input section may be .init which
3759 // is pasted together with other .init sections to form a
3760 // function. Aligning might insert zero padding resulting in
3761 // sigill. However we do need to increase alignment of the
3762 // output section so that the align_address() on offset in
3763 // set_address_and_size() adds the same padding as the
3764 // align_address() on address in stub_address().
3765 // What's more, we need this alignment for the layout done in
3766 // relaxation_loop_body() so that the output section starts at
3767 // a suitably aligned address.
3768 os->checkpoint_set_addralign(this->stub_align());
3770 if (this->last_plt_size_ != this->plt_size_
3771 || this->last_branch_size_ != this->branch_size_)
3773 this->last_plt_size_ = this->plt_size_;
3774 this->last_branch_size_ = this->branch_size_;
3780 // Add .eh_frame info for this stub section. Unlike other linker
3781 // generated .eh_frame this is added late in the link, because we
3782 // only want the .eh_frame info if this particular stub section is
3785 add_eh_frame(Layout* layout)
3787 if (!this->eh_frame_added_)
3789 if (!parameters->options().ld_generated_unwind_info())
3792 // Since we add stub .eh_frame info late, it must be placed
3793 // after all other linker generated .eh_frame info so that
3794 // merge mapping need not be updated for input sections.
3795 // There is no provision to use a different CIE to that used
3797 if (!this->targ_->has_glink())
3800 layout->add_eh_frame_for_plt(this,
3801 Eh_cie<size>::eh_frame_cie,
3802 sizeof (Eh_cie<size>::eh_frame_cie),
3804 sizeof (default_fde));
3805 this->eh_frame_added_ = true;
3809 Target_powerpc<size, big_endian>*
3815 class Plt_stub_ent_hash;
3816 typedef Unordered_map<Plt_stub_ent, unsigned int,
3817 Plt_stub_ent_hash> Plt_stub_entries;
3819 // Alignment of stub section.
3825 unsigned int min_align = 32;
3826 unsigned int user_align = 1 << parameters->options().plt_align();
3827 return std::max(user_align, min_align);
3830 // Return the plt offset for the given call stub.
3832 plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const
3834 const Symbol* gsym = p->first.sym_;
3837 *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC
3838 && gsym->can_use_relative_reloc(false));
3839 return gsym->plt_offset();
3844 const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
3845 unsigned int local_sym_index = p->first.locsym_;
3846 return relobj->local_plt_offset(local_sym_index);
3850 // Size of a given plt call stub.
3852 plt_call_size(typename Plt_stub_entries::const_iterator p) const
3858 Address plt_addr = this->plt_off(p, &is_iplt);
3860 plt_addr += this->targ_->iplt_section()->address();
3862 plt_addr += this->targ_->plt_section()->address();
3863 Address got_addr = this->targ_->got_section()->output_section()->address();
3864 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3865 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
3866 got_addr += ppcobj->toc_base_offset();
3867 Address off = plt_addr - got_addr;
3868 unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0);
3869 if (this->targ_->abiversion() < 2)
3871 bool static_chain = parameters->options().plt_static_chain();
3872 bool thread_safe = this->targ_->plt_thread_safe();
3876 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
3878 unsigned int align = 1 << parameters->options().plt_align();
3880 bytes = (bytes + align - 1) & -align;
3884 // Return long branch stub size.
3886 branch_stub_size(Address to)
3889 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
3890 if (to - loc + (1 << 25) < 2 << 25)
3892 if (size == 64 || !parameters->options().output_is_position_independent())
3899 do_write(Output_file*);
3901 // Plt call stub keys.
3905 Plt_stub_ent(const Symbol* sym)
3906 : sym_(sym), object_(0), addend_(0), locsym_(0)
3909 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3910 unsigned int locsym_index)
3911 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3914 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3916 unsigned int r_type,
3918 : sym_(sym), object_(0), addend_(0), locsym_(0)
3921 this->addend_ = addend;
3922 else if (parameters->options().output_is_position_independent()
3923 && r_type == elfcpp::R_PPC_PLTREL24)
3925 this->addend_ = addend;
3926 if (this->addend_ >= 32768)
3927 this->object_ = object;
3931 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3932 unsigned int locsym_index,
3933 unsigned int r_type,
3935 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3938 this->addend_ = addend;
3939 else if (parameters->options().output_is_position_independent()
3940 && r_type == elfcpp::R_PPC_PLTREL24)
3941 this->addend_ = addend;
3944 bool operator==(const Plt_stub_ent& that) const
3946 return (this->sym_ == that.sym_
3947 && this->object_ == that.object_
3948 && this->addend_ == that.addend_
3949 && this->locsym_ == that.locsym_);
3953 const Sized_relobj_file<size, big_endian>* object_;
3954 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
3955 unsigned int locsym_;
3958 class Plt_stub_ent_hash
3961 size_t operator()(const Plt_stub_ent& ent) const
3963 return (reinterpret_cast<uintptr_t>(ent.sym_)
3964 ^ reinterpret_cast<uintptr_t>(ent.object_)
3970 // Long branch stub keys.
3971 class Branch_stub_ent
3974 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj,
3975 Address to, bool save_res)
3976 : dest_(to), toc_base_off_(0), save_res_(save_res)
3979 toc_base_off_ = obj->toc_base_offset();
3982 bool operator==(const Branch_stub_ent& that) const
3984 return (this->dest_ == that.dest_
3986 || this->toc_base_off_ == that.toc_base_off_));
3990 unsigned int toc_base_off_;
3994 class Branch_stub_ent_hash
3997 size_t operator()(const Branch_stub_ent& ent) const
3998 { return ent.dest_ ^ ent.toc_base_off_; }
4001 // In a sane world this would be a global.
4002 Target_powerpc<size, big_endian>* targ_;
4003 // Map sym/object/addend to stub offset.
4004 Plt_stub_entries plt_call_stubs_;
4005 // Map destination address to stub offset.
4006 typedef Unordered_map<Branch_stub_ent, unsigned int,
4007 Branch_stub_ent_hash> Branch_stub_entries;
4008 Branch_stub_entries long_branch_stubs_;
4009 // size of input section
4010 section_size_type orig_data_size_;
4012 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
4013 // Whether .eh_frame info has been created for this stub section.
4014 bool eh_frame_added_;
4015 // Set if this stub group needs a copy of out-of-line register
4016 // save/restore functions.
4017 bool need_save_res_;
4020 // Add a plt call stub, if we do not already have one for this
4021 // sym/object/addend combo.
4023 template<int size, bool big_endian>
4025 Stub_table<size, big_endian>::add_plt_call_entry(
4027 const Sized_relobj_file<size, big_endian>* object,
4029 unsigned int r_type,
4032 Plt_stub_ent ent(object, gsym, r_type, addend);
4033 unsigned int off = this->plt_size_;
4034 std::pair<typename Plt_stub_entries::iterator, bool> p
4035 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
4037 this->plt_size_ = off + this->plt_call_size(p.first);
4038 return this->can_reach_stub(from, off, r_type);
4041 template<int size, bool big_endian>
4043 Stub_table<size, big_endian>::add_plt_call_entry(
4045 const Sized_relobj_file<size, big_endian>* object,
4046 unsigned int locsym_index,
4047 unsigned int r_type,
4050 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4051 unsigned int off = this->plt_size_;
4052 std::pair<typename Plt_stub_entries::iterator, bool> p
4053 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
4055 this->plt_size_ = off + this->plt_call_size(p.first);
4056 return this->can_reach_stub(from, off, r_type);
4059 // Find a plt call stub.
4061 template<int size, bool big_endian>
4062 typename Stub_table<size, big_endian>::Address
4063 Stub_table<size, big_endian>::find_plt_call_entry(
4064 const Sized_relobj_file<size, big_endian>* object,
4066 unsigned int r_type,
4067 Address addend) const
4069 Plt_stub_ent ent(object, gsym, r_type, addend);
4070 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4071 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4074 template<int size, bool big_endian>
4075 typename Stub_table<size, big_endian>::Address
4076 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
4078 Plt_stub_ent ent(gsym);
4079 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4080 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4083 template<int size, bool big_endian>
4084 typename Stub_table<size, big_endian>::Address
4085 Stub_table<size, big_endian>::find_plt_call_entry(
4086 const Sized_relobj_file<size, big_endian>* object,
4087 unsigned int locsym_index,
4088 unsigned int r_type,
4089 Address addend) const
4091 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4092 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4093 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4096 template<int size, bool big_endian>
4097 typename Stub_table<size, big_endian>::Address
4098 Stub_table<size, big_endian>::find_plt_call_entry(
4099 const Sized_relobj_file<size, big_endian>* object,
4100 unsigned int locsym_index) const
4102 Plt_stub_ent ent(object, locsym_index);
4103 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4104 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4107 // Add a long branch stub if we don't already have one to given
4110 template<int size, bool big_endian>
4112 Stub_table<size, big_endian>::add_long_branch_entry(
4113 const Powerpc_relobj<size, big_endian>* object,
4114 unsigned int r_type,
4119 Branch_stub_ent ent(object, to, save_res);
4120 Address off = this->branch_size_;
4121 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
4124 this->need_save_res_ = true;
4127 unsigned int stub_size = this->branch_stub_size(to);
4128 this->branch_size_ = off + stub_size;
4129 if (size == 64 && stub_size != 4)
4130 this->targ_->add_branch_lookup_table(to);
4133 return this->can_reach_stub(from, off, r_type);
4136 // Find long branch stub offset.
4138 template<int size, bool big_endian>
4139 typename Stub_table<size, big_endian>::Address
4140 Stub_table<size, big_endian>::find_long_branch_entry(
4141 const Powerpc_relobj<size, big_endian>* object,
4144 Branch_stub_ent ent(object, to, false);
4145 typename Branch_stub_entries::const_iterator p
4146 = this->long_branch_stubs_.find(ent);
4147 if (p == this->long_branch_stubs_.end())
4148 return invalid_address;
4149 if (p->first.save_res_)
4150 return to - this->targ_->savres_section()->address() + this->branch_size_;
4154 // A class to handle .glink.
4156 template<int size, bool big_endian>
4157 class Output_data_glink : public Output_section_data
4160 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4161 static const Address invalid_address = static_cast<Address>(0) - 1;
4162 static const int pltresolve_size = 16*4;
4164 Output_data_glink(Target_powerpc<size, big_endian>* targ)
4165 : Output_section_data(16), targ_(targ), global_entry_stubs_(),
4166 end_branch_table_(), ge_size_(0)
4170 add_eh_frame(Layout* layout);
4173 add_global_entry(const Symbol*);
4176 find_global_entry(const Symbol*) const;
4179 global_entry_address() const
4181 gold_assert(this->is_data_size_valid());
4182 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4183 return this->address() + global_entry_off;
4187 // Write to a map file.
4189 do_print_to_mapfile(Mapfile* mapfile) const
4190 { mapfile->print_output_data(this, _("** glink")); }
4194 set_final_data_size();
4198 do_write(Output_file*);
4200 // Allows access to .got and .plt for do_write.
4201 Target_powerpc<size, big_endian>* targ_;
4203 // Map sym to stub offset.
4204 typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries;
4205 Global_entry_stub_entries global_entry_stubs_;
4207 unsigned int end_branch_table_, ge_size_;
4210 template<int size, bool big_endian>
4212 Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout)
4214 if (!parameters->options().ld_generated_unwind_info())
4219 if (this->targ_->abiversion() < 2)
4220 layout->add_eh_frame_for_plt(this,
4221 Eh_cie<64>::eh_frame_cie,
4222 sizeof (Eh_cie<64>::eh_frame_cie),
4223 glink_eh_frame_fde_64v1,
4224 sizeof (glink_eh_frame_fde_64v1));
4226 layout->add_eh_frame_for_plt(this,
4227 Eh_cie<64>::eh_frame_cie,
4228 sizeof (Eh_cie<64>::eh_frame_cie),
4229 glink_eh_frame_fde_64v2,
4230 sizeof (glink_eh_frame_fde_64v2));
4234 // 32-bit .glink can use the default since the CIE return
4235 // address reg, LR, is valid.
4236 layout->add_eh_frame_for_plt(this,
4237 Eh_cie<32>::eh_frame_cie,
4238 sizeof (Eh_cie<32>::eh_frame_cie),
4240 sizeof (default_fde));
4241 // Except where LR is used in a PIC __glink_PLTresolve.
4242 if (parameters->options().output_is_position_independent())
4243 layout->add_eh_frame_for_plt(this,
4244 Eh_cie<32>::eh_frame_cie,
4245 sizeof (Eh_cie<32>::eh_frame_cie),
4246 glink_eh_frame_fde_32,
4247 sizeof (glink_eh_frame_fde_32));
4251 template<int size, bool big_endian>
4253 Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym)
4255 std::pair<typename Global_entry_stub_entries::iterator, bool> p
4256 = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_));
4258 this->ge_size_ += 16;
4261 template<int size, bool big_endian>
4262 typename Output_data_glink<size, big_endian>::Address
4263 Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const
4265 typename Global_entry_stub_entries::const_iterator p
4266 = this->global_entry_stubs_.find(gsym);
4267 return p == this->global_entry_stubs_.end() ? invalid_address : p->second;
4270 template<int size, bool big_endian>
4272 Output_data_glink<size, big_endian>::set_final_data_size()
4274 unsigned int count = this->targ_->plt_entry_count();
4275 section_size_type total = 0;
4281 // space for branch table
4282 total += 4 * (count - 1);
4284 total += -total & 15;
4285 total += this->pltresolve_size;
4289 total += this->pltresolve_size;
4291 // space for branch table
4293 if (this->targ_->abiversion() < 2)
4297 total += 4 * (count - 0x8000);
4301 this->end_branch_table_ = total;
4302 total = (total + 15) & -16;
4303 total += this->ge_size_;
4305 this->set_data_size(total);
4308 // Write out plt and long branch stub code.
4310 template<int size, bool big_endian>
4312 Stub_table<size, big_endian>::do_write(Output_file* of)
4314 if (this->plt_call_stubs_.empty()
4315 && this->long_branch_stubs_.empty())
4318 const section_size_type start_off = this->offset();
4319 const section_size_type off = this->stub_offset();
4320 const section_size_type oview_size =
4321 convert_to_section_size_type(this->data_size() - (off - start_off));
4322 unsigned char* const oview = of->get_output_view(off, oview_size);
4327 const Output_data_got_powerpc<size, big_endian>* got
4328 = this->targ_->got_section();
4329 Address got_os_addr = got->output_section()->address();
4331 if (!this->plt_call_stubs_.empty())
4333 // The base address of the .plt section.
4334 Address plt_base = this->targ_->plt_section()->address();
4335 Address iplt_base = invalid_address;
4337 // Write out plt call stubs.
4338 typename Plt_stub_entries::const_iterator cs;
4339 for (cs = this->plt_call_stubs_.begin();
4340 cs != this->plt_call_stubs_.end();
4344 Address pltoff = this->plt_off(cs, &is_iplt);
4345 Address plt_addr = pltoff;
4348 if (iplt_base == invalid_address)
4349 iplt_base = this->targ_->iplt_section()->address();
4350 plt_addr += iplt_base;
4353 plt_addr += plt_base;
4354 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
4355 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
4356 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
4357 Address off = plt_addr - got_addr;
4359 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
4360 gold_error(_("%s: linkage table error against `%s'"),
4361 cs->first.object_->name().c_str(),
4362 cs->first.sym_->demangled_name().c_str());
4364 bool plt_load_toc = this->targ_->abiversion() < 2;
4366 = plt_load_toc && parameters->options().plt_static_chain();
4368 = plt_load_toc && this->targ_->plt_thread_safe();
4369 bool use_fake_dep = false;
4370 Address cmp_branch_off = 0;
4373 unsigned int pltindex
4374 = ((pltoff - this->targ_->first_plt_entry_offset())
4375 / this->targ_->plt_entry_size());
4377 = (this->targ_->glink_section()->pltresolve_size
4379 if (pltindex > 32768)
4380 glinkoff += (pltindex - 32768) * 4;
4382 = this->targ_->glink_section()->address() + glinkoff;
4384 = (this->stub_address() + cs->second + 24
4385 + 4 * (ha(off) != 0)
4386 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
4387 + 4 * static_chain);
4388 cmp_branch_off = to - from;
4389 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
4392 p = oview + cs->second;
4395 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4399 write_insn<big_endian>(p, addis_11_2 + ha(off));
4401 write_insn<big_endian>(p, ld_12_11 + l(off));
4406 write_insn<big_endian>(p, addis_12_2 + ha(off));
4408 write_insn<big_endian>(p, ld_12_12 + l(off));
4412 && ha(off + 8 + 8 * static_chain) != ha(off))
4414 write_insn<big_endian>(p, addi_11_11 + l(off));
4418 write_insn<big_endian>(p, mtctr_12);
4424 write_insn<big_endian>(p, xor_2_12_12);
4426 write_insn<big_endian>(p, add_11_11_2);
4429 write_insn<big_endian>(p, ld_2_11 + l(off + 8));
4433 write_insn<big_endian>(p, ld_11_11 + l(off + 16));
4440 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4442 write_insn<big_endian>(p, ld_12_2 + l(off));
4445 && ha(off + 8 + 8 * static_chain) != ha(off))
4447 write_insn<big_endian>(p, addi_2_2 + l(off));
4451 write_insn<big_endian>(p, mtctr_12);
4457 write_insn<big_endian>(p, xor_11_12_12);
4459 write_insn<big_endian>(p, add_2_2_11);
4464 write_insn<big_endian>(p, ld_11_2 + l(off + 16));
4467 write_insn<big_endian>(p, ld_2_2 + l(off + 8));
4471 if (thread_safe && !use_fake_dep)
4473 write_insn<big_endian>(p, cmpldi_2_0);
4475 write_insn<big_endian>(p, bnectr_p4);
4477 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
4480 write_insn<big_endian>(p, bctr);
4484 // Write out long branch stubs.
4485 typename Branch_stub_entries::const_iterator bs;
4486 for (bs = this->long_branch_stubs_.begin();
4487 bs != this->long_branch_stubs_.end();
4490 if (bs->first.save_res_)
4492 p = oview + this->plt_size_ + bs->second;
4493 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4494 Address delta = bs->first.dest_ - loc;
4495 if (delta + (1 << 25) < 2 << 25)
4496 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4500 = this->targ_->find_branch_lookup_table(bs->first.dest_);
4501 gold_assert(brlt_addr != invalid_address);
4502 brlt_addr += this->targ_->brlt_section()->address();
4503 Address got_addr = got_os_addr + bs->first.toc_base_off_;
4504 Address brltoff = brlt_addr - got_addr;
4505 if (ha(brltoff) == 0)
4507 write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4;
4511 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
4512 write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4;
4514 write_insn<big_endian>(p, mtctr_12), p += 4;
4515 write_insn<big_endian>(p, bctr);
4521 if (!this->plt_call_stubs_.empty())
4523 // The base address of the .plt section.
4524 Address plt_base = this->targ_->plt_section()->address();
4525 Address iplt_base = invalid_address;
4526 // The address of _GLOBAL_OFFSET_TABLE_.
4527 Address g_o_t = invalid_address;
4529 // Write out plt call stubs.
4530 typename Plt_stub_entries::const_iterator cs;
4531 for (cs = this->plt_call_stubs_.begin();
4532 cs != this->plt_call_stubs_.end();
4536 Address plt_addr = this->plt_off(cs, &is_iplt);
4539 if (iplt_base == invalid_address)
4540 iplt_base = this->targ_->iplt_section()->address();
4541 plt_addr += iplt_base;
4544 plt_addr += plt_base;
4546 p = oview + cs->second;
4547 if (parameters->options().output_is_position_independent())
4550 const Powerpc_relobj<size, big_endian>* ppcobj
4551 = (static_cast<const Powerpc_relobj<size, big_endian>*>
4552 (cs->first.object_));
4553 if (ppcobj != NULL && cs->first.addend_ >= 32768)
4555 unsigned int got2 = ppcobj->got2_shndx();
4556 got_addr = ppcobj->get_output_section_offset(got2);
4557 gold_assert(got_addr != invalid_address);
4558 got_addr += (ppcobj->output_section(got2)->address()
4559 + cs->first.addend_);
4563 if (g_o_t == invalid_address)
4565 const Output_data_got_powerpc<size, big_endian>* got
4566 = this->targ_->got_section();
4567 g_o_t = got->address() + got->g_o_t();
4572 Address off = plt_addr - got_addr;
4575 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
4576 write_insn<big_endian>(p + 4, mtctr_11);
4577 write_insn<big_endian>(p + 8, bctr);
4581 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
4582 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
4583 write_insn<big_endian>(p + 8, mtctr_11);
4584 write_insn<big_endian>(p + 12, bctr);
4589 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
4590 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
4591 write_insn<big_endian>(p + 8, mtctr_11);
4592 write_insn<big_endian>(p + 12, bctr);
4597 // Write out long branch stubs.
4598 typename Branch_stub_entries::const_iterator bs;
4599 for (bs = this->long_branch_stubs_.begin();
4600 bs != this->long_branch_stubs_.end();
4603 if (bs->first.save_res_)
4605 p = oview + this->plt_size_ + bs->second;
4606 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4607 Address delta = bs->first.dest_ - loc;
4608 if (delta + (1 << 25) < 2 << 25)
4609 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4610 else if (!parameters->options().output_is_position_independent())
4612 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
4613 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
4614 write_insn<big_endian>(p + 8, mtctr_12);
4615 write_insn<big_endian>(p + 12, bctr);
4620 write_insn<big_endian>(p + 0, mflr_0);
4621 write_insn<big_endian>(p + 4, bcl_20_31);
4622 write_insn<big_endian>(p + 8, mflr_12);
4623 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
4624 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
4625 write_insn<big_endian>(p + 20, mtlr_0);
4626 write_insn<big_endian>(p + 24, mtctr_12);
4627 write_insn<big_endian>(p + 28, bctr);
4631 if (this->need_save_res_)
4633 p = oview + this->plt_size_ + this->branch_size_;
4634 memcpy (p, this->targ_->savres_section()->contents(),
4635 this->targ_->savres_section()->data_size());
4639 // Write out .glink.
4641 template<int size, bool big_endian>
4643 Output_data_glink<size, big_endian>::do_write(Output_file* of)
4645 const section_size_type off = this->offset();
4646 const section_size_type oview_size =
4647 convert_to_section_size_type(this->data_size());
4648 unsigned char* const oview = of->get_output_view(off, oview_size);
4651 // The base address of the .plt section.
4652 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4653 Address plt_base = this->targ_->plt_section()->address();
4657 if (this->end_branch_table_ != 0)
4659 // Write pltresolve stub.
4661 Address after_bcl = this->address() + 16;
4662 Address pltoff = plt_base - after_bcl;
4664 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
4666 if (this->targ_->abiversion() < 2)
4668 write_insn<big_endian>(p, mflr_12), p += 4;
4669 write_insn<big_endian>(p, bcl_20_31), p += 4;
4670 write_insn<big_endian>(p, mflr_11), p += 4;
4671 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4672 write_insn<big_endian>(p, mtlr_12), p += 4;
4673 write_insn<big_endian>(p, add_11_2_11), p += 4;
4674 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4675 write_insn<big_endian>(p, ld_2_11 + 8), p += 4;
4676 write_insn<big_endian>(p, mtctr_12), p += 4;
4677 write_insn<big_endian>(p, ld_11_11 + 16), p += 4;
4681 write_insn<big_endian>(p, mflr_0), p += 4;
4682 write_insn<big_endian>(p, bcl_20_31), p += 4;
4683 write_insn<big_endian>(p, mflr_11), p += 4;
4684 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4685 write_insn<big_endian>(p, mtlr_0), p += 4;
4686 write_insn<big_endian>(p, sub_12_12_11), p += 4;
4687 write_insn<big_endian>(p, add_11_2_11), p += 4;
4688 write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4;
4689 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4690 write_insn<big_endian>(p, srdi_0_0_2), p += 4;
4691 write_insn<big_endian>(p, mtctr_12), p += 4;
4692 write_insn<big_endian>(p, ld_11_11 + 8), p += 4;
4694 write_insn<big_endian>(p, bctr), p += 4;
4695 while (p < oview + this->pltresolve_size)
4696 write_insn<big_endian>(p, nop), p += 4;
4698 // Write lazy link call stubs.
4700 while (p < oview + this->end_branch_table_)
4702 if (this->targ_->abiversion() < 2)
4706 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
4710 write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4;
4711 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
4714 uint32_t branch_off = 8 - (p - oview);
4715 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
4720 Address plt_base = this->targ_->plt_section()->address();
4721 Address iplt_base = invalid_address;
4722 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4723 Address global_entry_base = this->address() + global_entry_off;
4724 typename Global_entry_stub_entries::const_iterator ge;
4725 for (ge = this->global_entry_stubs_.begin();
4726 ge != this->global_entry_stubs_.end();
4729 p = oview + global_entry_off + ge->second;
4730 Address plt_addr = ge->first->plt_offset();
4731 if (ge->first->type() == elfcpp::STT_GNU_IFUNC
4732 && ge->first->can_use_relative_reloc(false))
4734 if (iplt_base == invalid_address)
4735 iplt_base = this->targ_->iplt_section()->address();
4736 plt_addr += iplt_base;
4739 plt_addr += plt_base;
4740 Address my_addr = global_entry_base + ge->second;
4741 Address off = plt_addr - my_addr;
4743 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
4744 gold_error(_("%s: linkage table error against `%s'"),
4745 ge->first->object()->name().c_str(),
4746 ge->first->demangled_name().c_str());
4748 write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4;
4749 write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4;
4750 write_insn<big_endian>(p, mtctr_12), p += 4;
4751 write_insn<big_endian>(p, bctr);
4756 const Output_data_got_powerpc<size, big_endian>* got
4757 = this->targ_->got_section();
4758 // The address of _GLOBAL_OFFSET_TABLE_.
4759 Address g_o_t = got->address() + got->g_o_t();
4761 // Write out pltresolve branch table.
4763 unsigned int the_end = oview_size - this->pltresolve_size;
4764 unsigned char* end_p = oview + the_end;
4765 while (p < end_p - 8 * 4)
4766 write_insn<big_endian>(p, b + end_p - p), p += 4;
4768 write_insn<big_endian>(p, nop), p += 4;
4770 // Write out pltresolve call stub.
4771 if (parameters->options().output_is_position_independent())
4773 Address res0_off = 0;
4774 Address after_bcl_off = the_end + 12;
4775 Address bcl_res0 = after_bcl_off - res0_off;
4777 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
4778 write_insn<big_endian>(p + 4, mflr_0);
4779 write_insn<big_endian>(p + 8, bcl_20_31);
4780 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
4781 write_insn<big_endian>(p + 16, mflr_12);
4782 write_insn<big_endian>(p + 20, mtlr_0);
4783 write_insn<big_endian>(p + 24, sub_11_11_12);
4785 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
4787 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
4788 if (ha(got_bcl) == ha(got_bcl + 4))
4790 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
4791 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
4795 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
4796 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
4798 write_insn<big_endian>(p + 40, mtctr_0);
4799 write_insn<big_endian>(p + 44, add_0_11_11);
4800 write_insn<big_endian>(p + 48, add_11_0_11);
4801 write_insn<big_endian>(p + 52, bctr);
4802 write_insn<big_endian>(p + 56, nop);
4803 write_insn<big_endian>(p + 60, nop);
4807 Address res0 = this->address();
4809 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
4810 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
4811 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4812 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
4814 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
4815 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
4816 write_insn<big_endian>(p + 16, mtctr_0);
4817 write_insn<big_endian>(p + 20, add_0_11_11);
4818 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4819 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
4821 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
4822 write_insn<big_endian>(p + 28, add_11_0_11);
4823 write_insn<big_endian>(p + 32, bctr);
4824 write_insn<big_endian>(p + 36, nop);
4825 write_insn<big_endian>(p + 40, nop);
4826 write_insn<big_endian>(p + 44, nop);
4827 write_insn<big_endian>(p + 48, nop);
4828 write_insn<big_endian>(p + 52, nop);
4829 write_insn<big_endian>(p + 56, nop);
4830 write_insn<big_endian>(p + 60, nop);
4835 of->write_output_view(off, oview_size, oview);
4839 // A class to handle linker generated save/restore functions.
4841 template<int size, bool big_endian>
4842 class Output_data_save_res : public Output_section_data_build
4845 Output_data_save_res(Symbol_table* symtab);
4847 const unsigned char*
4854 // Write to a map file.
4856 do_print_to_mapfile(Mapfile* mapfile) const
4857 { mapfile->print_output_data(this, _("** save/restore")); }
4860 do_write(Output_file*);
4863 // The maximum size of save/restore contents.
4864 static const unsigned int savres_max = 218*4;
4867 savres_define(Symbol_table* symtab,
4869 unsigned int lo, unsigned int hi,
4870 unsigned char* write_ent(unsigned char*, int),
4871 unsigned char* write_tail(unsigned char*, int));
4873 unsigned char *contents_;
4876 template<bool big_endian>
4877 static unsigned char*
4878 savegpr0(unsigned char* p, int r)
4880 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4881 write_insn<big_endian>(p, insn);
4885 template<bool big_endian>
4886 static unsigned char*
4887 savegpr0_tail(unsigned char* p, int r)
4889 p = savegpr0<big_endian>(p, r);
4890 uint32_t insn = std_0_1 + 16;
4891 write_insn<big_endian>(p, insn);
4893 write_insn<big_endian>(p, blr);
4897 template<bool big_endian>
4898 static unsigned char*
4899 restgpr0(unsigned char* p, int r)
4901 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4902 write_insn<big_endian>(p, insn);
4906 template<bool big_endian>
4907 static unsigned char*
4908 restgpr0_tail(unsigned char* p, int r)
4910 uint32_t insn = ld_0_1 + 16;
4911 write_insn<big_endian>(p, insn);
4913 p = restgpr0<big_endian>(p, r);
4914 write_insn<big_endian>(p, mtlr_0);
4918 p = restgpr0<big_endian>(p, 30);
4919 p = restgpr0<big_endian>(p, 31);
4921 write_insn<big_endian>(p, blr);
4925 template<bool big_endian>
4926 static unsigned char*
4927 savegpr1(unsigned char* p, int r)
4929 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4930 write_insn<big_endian>(p, insn);
4934 template<bool big_endian>
4935 static unsigned char*
4936 savegpr1_tail(unsigned char* p, int r)
4938 p = savegpr1<big_endian>(p, r);
4939 write_insn<big_endian>(p, blr);
4943 template<bool big_endian>
4944 static unsigned char*
4945 restgpr1(unsigned char* p, int r)
4947 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4948 write_insn<big_endian>(p, insn);
4952 template<bool big_endian>
4953 static unsigned char*
4954 restgpr1_tail(unsigned char* p, int r)
4956 p = restgpr1<big_endian>(p, r);
4957 write_insn<big_endian>(p, blr);
4961 template<bool big_endian>
4962 static unsigned char*
4963 savefpr(unsigned char* p, int r)
4965 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4966 write_insn<big_endian>(p, insn);
4970 template<bool big_endian>
4971 static unsigned char*
4972 savefpr0_tail(unsigned char* p, int r)
4974 p = savefpr<big_endian>(p, r);
4975 write_insn<big_endian>(p, std_0_1 + 16);
4977 write_insn<big_endian>(p, blr);
4981 template<bool big_endian>
4982 static unsigned char*
4983 restfpr(unsigned char* p, int r)
4985 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4986 write_insn<big_endian>(p, insn);
4990 template<bool big_endian>
4991 static unsigned char*
4992 restfpr0_tail(unsigned char* p, int r)
4994 write_insn<big_endian>(p, ld_0_1 + 16);
4996 p = restfpr<big_endian>(p, r);
4997 write_insn<big_endian>(p, mtlr_0);
5001 p = restfpr<big_endian>(p, 30);
5002 p = restfpr<big_endian>(p, 31);
5004 write_insn<big_endian>(p, blr);
5008 template<bool big_endian>
5009 static unsigned char*
5010 savefpr1_tail(unsigned char* p, int r)
5012 p = savefpr<big_endian>(p, r);
5013 write_insn<big_endian>(p, blr);
5017 template<bool big_endian>
5018 static unsigned char*
5019 restfpr1_tail(unsigned char* p, int r)
5021 p = restfpr<big_endian>(p, r);
5022 write_insn<big_endian>(p, blr);
5026 template<bool big_endian>
5027 static unsigned char*
5028 savevr(unsigned char* p, int r)
5030 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5031 write_insn<big_endian>(p, insn);
5033 insn = stvx_0_12_0 + (r << 21);
5034 write_insn<big_endian>(p, insn);
5038 template<bool big_endian>
5039 static unsigned char*
5040 savevr_tail(unsigned char* p, int r)
5042 p = savevr<big_endian>(p, r);
5043 write_insn<big_endian>(p, blr);
5047 template<bool big_endian>
5048 static unsigned char*
5049 restvr(unsigned char* p, int r)
5051 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5052 write_insn<big_endian>(p, insn);
5054 insn = lvx_0_12_0 + (r << 21);
5055 write_insn<big_endian>(p, insn);
5059 template<bool big_endian>
5060 static unsigned char*
5061 restvr_tail(unsigned char* p, int r)
5063 p = restvr<big_endian>(p, r);
5064 write_insn<big_endian>(p, blr);
5069 template<int size, bool big_endian>
5070 Output_data_save_res<size, big_endian>::Output_data_save_res(
5071 Symbol_table* symtab)
5072 : Output_section_data_build(4),
5075 this->savres_define(symtab,
5076 "_savegpr0_", 14, 31,
5077 savegpr0<big_endian>, savegpr0_tail<big_endian>);
5078 this->savres_define(symtab,
5079 "_restgpr0_", 14, 29,
5080 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5081 this->savres_define(symtab,
5082 "_restgpr0_", 30, 31,
5083 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5084 this->savres_define(symtab,
5085 "_savegpr1_", 14, 31,
5086 savegpr1<big_endian>, savegpr1_tail<big_endian>);
5087 this->savres_define(symtab,
5088 "_restgpr1_", 14, 31,
5089 restgpr1<big_endian>, restgpr1_tail<big_endian>);
5090 this->savres_define(symtab,
5091 "_savefpr_", 14, 31,
5092 savefpr<big_endian>, savefpr0_tail<big_endian>);
5093 this->savres_define(symtab,
5094 "_restfpr_", 14, 29,
5095 restfpr<big_endian>, restfpr0_tail<big_endian>);
5096 this->savres_define(symtab,
5097 "_restfpr_", 30, 31,
5098 restfpr<big_endian>, restfpr0_tail<big_endian>);
5099 this->savres_define(symtab,
5101 savefpr<big_endian>, savefpr1_tail<big_endian>);
5102 this->savres_define(symtab,
5104 restfpr<big_endian>, restfpr1_tail<big_endian>);
5105 this->savres_define(symtab,
5107 savevr<big_endian>, savevr_tail<big_endian>);
5108 this->savres_define(symtab,
5110 restvr<big_endian>, restvr_tail<big_endian>);
5113 template<int size, bool big_endian>
5115 Output_data_save_res<size, big_endian>::savres_define(
5116 Symbol_table* symtab,
5118 unsigned int lo, unsigned int hi,
5119 unsigned char* write_ent(unsigned char*, int),
5120 unsigned char* write_tail(unsigned char*, int))
5122 size_t len = strlen(name);
5123 bool writing = false;
5126 memcpy(sym, name, len);
5129 for (unsigned int i = lo; i <= hi; i++)
5131 sym[len + 0] = i / 10 + '0';
5132 sym[len + 1] = i % 10 + '0';
5133 Symbol* gsym = symtab->lookup(sym);
5134 bool refd = gsym != NULL && gsym->is_undefined();
5135 writing = writing || refd;
5138 if (this->contents_ == NULL)
5139 this->contents_ = new unsigned char[this->savres_max];
5141 section_size_type value = this->current_data_size();
5142 unsigned char* p = this->contents_ + value;
5144 p = write_ent(p, i);
5146 p = write_tail(p, i);
5147 section_size_type cur_size = p - this->contents_;
5148 this->set_current_data_size(cur_size);
5150 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
5151 this, value, cur_size - value,
5152 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
5153 elfcpp::STV_HIDDEN, 0, false, false);
5158 // Write out save/restore.
5160 template<int size, bool big_endian>
5162 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
5164 const section_size_type off = this->offset();
5165 const section_size_type oview_size =
5166 convert_to_section_size_type(this->data_size());
5167 unsigned char* const oview = of->get_output_view(off, oview_size);
5168 memcpy(oview, this->contents_, oview_size);
5169 of->write_output_view(off, oview_size, oview);
5173 // Create the glink section.
5175 template<int size, bool big_endian>
5177 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
5179 if (this->glink_ == NULL)
5181 this->glink_ = new Output_data_glink<size, big_endian>(this);
5182 this->glink_->add_eh_frame(layout);
5183 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5184 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5185 this->glink_, ORDER_TEXT, false);
5189 // Create a PLT entry for a global symbol.
5191 template<int size, bool big_endian>
5193 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
5197 if (gsym->type() == elfcpp::STT_GNU_IFUNC
5198 && gsym->can_use_relative_reloc(false))
5200 if (this->iplt_ == NULL)
5201 this->make_iplt_section(symtab, layout);
5202 this->iplt_->add_ifunc_entry(gsym);
5206 if (this->plt_ == NULL)
5207 this->make_plt_section(symtab, layout);
5208 this->plt_->add_entry(gsym);
5212 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5214 template<int size, bool big_endian>
5216 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
5217 Symbol_table* symtab,
5219 Sized_relobj_file<size, big_endian>* relobj,
5222 if (this->iplt_ == NULL)
5223 this->make_iplt_section(symtab, layout);
5224 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
5227 // Return the number of entries in the PLT.
5229 template<int size, bool big_endian>
5231 Target_powerpc<size, big_endian>::plt_entry_count() const
5233 if (this->plt_ == NULL)
5235 return this->plt_->entry_count();
5238 // Create a GOT entry for local dynamic __tls_get_addr calls.
5240 template<int size, bool big_endian>
5242 Target_powerpc<size, big_endian>::tlsld_got_offset(
5243 Symbol_table* symtab,
5245 Sized_relobj_file<size, big_endian>* object)
5247 if (this->tlsld_got_offset_ == -1U)
5249 gold_assert(symtab != NULL && layout != NULL && object != NULL);
5250 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
5251 Output_data_got_powerpc<size, big_endian>* got
5252 = this->got_section(symtab, layout);
5253 unsigned int got_offset = got->add_constant_pair(0, 0);
5254 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
5256 this->tlsld_got_offset_ = got_offset;
5258 return this->tlsld_got_offset_;
5261 // Get the Reference_flags for a particular relocation.
5263 template<int size, bool big_endian>
5265 Target_powerpc<size, big_endian>::Scan::get_reference_flags(
5266 unsigned int r_type,
5267 const Target_powerpc* target)
5273 case elfcpp::R_POWERPC_NONE:
5274 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5275 case elfcpp::R_POWERPC_GNU_VTENTRY:
5276 case elfcpp::R_PPC64_TOC:
5277 // No symbol reference.
5280 case elfcpp::R_PPC64_ADDR64:
5281 case elfcpp::R_PPC64_UADDR64:
5282 case elfcpp::R_POWERPC_ADDR32:
5283 case elfcpp::R_POWERPC_UADDR32:
5284 case elfcpp::R_POWERPC_ADDR16:
5285 case elfcpp::R_POWERPC_UADDR16:
5286 case elfcpp::R_POWERPC_ADDR16_LO:
5287 case elfcpp::R_POWERPC_ADDR16_HI:
5288 case elfcpp::R_POWERPC_ADDR16_HA:
5289 ref = Symbol::ABSOLUTE_REF;
5292 case elfcpp::R_POWERPC_ADDR24:
5293 case elfcpp::R_POWERPC_ADDR14:
5294 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5295 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5296 ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
5299 case elfcpp::R_PPC64_REL64:
5300 case elfcpp::R_POWERPC_REL32:
5301 case elfcpp::R_PPC_LOCAL24PC:
5302 case elfcpp::R_POWERPC_REL16:
5303 case elfcpp::R_POWERPC_REL16_LO:
5304 case elfcpp::R_POWERPC_REL16_HI:
5305 case elfcpp::R_POWERPC_REL16_HA:
5306 ref = Symbol::RELATIVE_REF;
5309 case elfcpp::R_POWERPC_REL24:
5310 case elfcpp::R_PPC_PLTREL24:
5311 case elfcpp::R_POWERPC_REL14:
5312 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5313 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5314 ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
5317 case elfcpp::R_POWERPC_GOT16:
5318 case elfcpp::R_POWERPC_GOT16_LO:
5319 case elfcpp::R_POWERPC_GOT16_HI:
5320 case elfcpp::R_POWERPC_GOT16_HA:
5321 case elfcpp::R_PPC64_GOT16_DS:
5322 case elfcpp::R_PPC64_GOT16_LO_DS:
5323 case elfcpp::R_PPC64_TOC16:
5324 case elfcpp::R_PPC64_TOC16_LO:
5325 case elfcpp::R_PPC64_TOC16_HI:
5326 case elfcpp::R_PPC64_TOC16_HA:
5327 case elfcpp::R_PPC64_TOC16_DS:
5328 case elfcpp::R_PPC64_TOC16_LO_DS:
5329 ref = Symbol::RELATIVE_REF;
5332 case elfcpp::R_POWERPC_GOT_TPREL16:
5333 case elfcpp::R_POWERPC_TLS:
5334 ref = Symbol::TLS_REF;
5337 case elfcpp::R_POWERPC_COPY:
5338 case elfcpp::R_POWERPC_GLOB_DAT:
5339 case elfcpp::R_POWERPC_JMP_SLOT:
5340 case elfcpp::R_POWERPC_RELATIVE:
5341 case elfcpp::R_POWERPC_DTPMOD:
5343 // Not expected. We will give an error later.
5347 if (size == 64 && target->abiversion() < 2)
5348 ref |= Symbol::FUNC_DESC_ABI;
5352 // Report an unsupported relocation against a local symbol.
5354 template<int size, bool big_endian>
5356 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
5357 Sized_relobj_file<size, big_endian>* object,
5358 unsigned int r_type)
5360 gold_error(_("%s: unsupported reloc %u against local symbol"),
5361 object->name().c_str(), r_type);
5364 // We are about to emit a dynamic relocation of type R_TYPE. If the
5365 // dynamic linker does not support it, issue an error.
5367 template<int size, bool big_endian>
5369 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
5370 unsigned int r_type)
5372 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
5374 // These are the relocation types supported by glibc for both 32-bit
5375 // and 64-bit powerpc.
5378 case elfcpp::R_POWERPC_NONE:
5379 case elfcpp::R_POWERPC_RELATIVE:
5380 case elfcpp::R_POWERPC_GLOB_DAT:
5381 case elfcpp::R_POWERPC_DTPMOD:
5382 case elfcpp::R_POWERPC_DTPREL:
5383 case elfcpp::R_POWERPC_TPREL:
5384 case elfcpp::R_POWERPC_JMP_SLOT:
5385 case elfcpp::R_POWERPC_COPY:
5386 case elfcpp::R_POWERPC_IRELATIVE:
5387 case elfcpp::R_POWERPC_ADDR32:
5388 case elfcpp::R_POWERPC_UADDR32:
5389 case elfcpp::R_POWERPC_ADDR24:
5390 case elfcpp::R_POWERPC_ADDR16:
5391 case elfcpp::R_POWERPC_UADDR16:
5392 case elfcpp::R_POWERPC_ADDR16_LO:
5393 case elfcpp::R_POWERPC_ADDR16_HI:
5394 case elfcpp::R_POWERPC_ADDR16_HA:
5395 case elfcpp::R_POWERPC_ADDR14:
5396 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5397 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5398 case elfcpp::R_POWERPC_REL32:
5399 case elfcpp::R_POWERPC_REL24:
5400 case elfcpp::R_POWERPC_TPREL16:
5401 case elfcpp::R_POWERPC_TPREL16_LO:
5402 case elfcpp::R_POWERPC_TPREL16_HI:
5403 case elfcpp::R_POWERPC_TPREL16_HA:
5414 // These are the relocation types supported only on 64-bit.
5415 case elfcpp::R_PPC64_ADDR64:
5416 case elfcpp::R_PPC64_UADDR64:
5417 case elfcpp::R_PPC64_JMP_IREL:
5418 case elfcpp::R_PPC64_ADDR16_DS:
5419 case elfcpp::R_PPC64_ADDR16_LO_DS:
5420 case elfcpp::R_PPC64_ADDR16_HIGH:
5421 case elfcpp::R_PPC64_ADDR16_HIGHA:
5422 case elfcpp::R_PPC64_ADDR16_HIGHER:
5423 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5424 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5425 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5426 case elfcpp::R_PPC64_REL64:
5427 case elfcpp::R_POWERPC_ADDR30:
5428 case elfcpp::R_PPC64_TPREL16_DS:
5429 case elfcpp::R_PPC64_TPREL16_LO_DS:
5430 case elfcpp::R_PPC64_TPREL16_HIGH:
5431 case elfcpp::R_PPC64_TPREL16_HIGHA:
5432 case elfcpp::R_PPC64_TPREL16_HIGHER:
5433 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5434 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5435 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5446 // These are the relocation types supported only on 32-bit.
5447 // ??? glibc ld.so doesn't need to support these.
5448 case elfcpp::R_POWERPC_DTPREL16:
5449 case elfcpp::R_POWERPC_DTPREL16_LO:
5450 case elfcpp::R_POWERPC_DTPREL16_HI:
5451 case elfcpp::R_POWERPC_DTPREL16_HA:
5459 // This prevents us from issuing more than one error per reloc
5460 // section. But we can still wind up issuing more than one
5461 // error per object file.
5462 if (this->issued_non_pic_error_)
5464 gold_assert(parameters->options().output_is_position_independent());
5465 object->error(_("requires unsupported dynamic reloc; "
5466 "recompile with -fPIC"));
5467 this->issued_non_pic_error_ = true;
5471 // Return whether we need to make a PLT entry for a relocation of the
5472 // given type against a STT_GNU_IFUNC symbol.
5474 template<int size, bool big_endian>
5476 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
5477 Target_powerpc<size, big_endian>* target,
5478 Sized_relobj_file<size, big_endian>* object,
5479 unsigned int r_type,
5482 // In non-pic code any reference will resolve to the plt call stub
5483 // for the ifunc symbol.
5484 if ((size == 32 || target->abiversion() >= 2)
5485 && !parameters->options().output_is_position_independent())
5490 // Word size refs from data sections are OK, but don't need a PLT entry.
5491 case elfcpp::R_POWERPC_ADDR32:
5492 case elfcpp::R_POWERPC_UADDR32:
5497 case elfcpp::R_PPC64_ADDR64:
5498 case elfcpp::R_PPC64_UADDR64:
5503 // GOT refs are good, but also don't need a PLT entry.
5504 case elfcpp::R_POWERPC_GOT16:
5505 case elfcpp::R_POWERPC_GOT16_LO:
5506 case elfcpp::R_POWERPC_GOT16_HI:
5507 case elfcpp::R_POWERPC_GOT16_HA:
5508 case elfcpp::R_PPC64_GOT16_DS:
5509 case elfcpp::R_PPC64_GOT16_LO_DS:
5512 // Function calls are good, and these do need a PLT entry.
5513 case elfcpp::R_POWERPC_ADDR24:
5514 case elfcpp::R_POWERPC_ADDR14:
5515 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5516 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5517 case elfcpp::R_POWERPC_REL24:
5518 case elfcpp::R_PPC_PLTREL24:
5519 case elfcpp::R_POWERPC_REL14:
5520 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5521 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5528 // Anything else is a problem.
5529 // If we are building a static executable, the libc startup function
5530 // responsible for applying indirect function relocations is going
5531 // to complain about the reloc type.
5532 // If we are building a dynamic executable, we will have a text
5533 // relocation. The dynamic loader will set the text segment
5534 // writable and non-executable to apply text relocations. So we'll
5535 // segfault when trying to run the indirection function to resolve
5538 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5539 object->name().c_str(), r_type);
5543 // Scan a relocation for a local symbol.
5545 template<int size, bool big_endian>
5547 Target_powerpc<size, big_endian>::Scan::local(
5548 Symbol_table* symtab,
5550 Target_powerpc<size, big_endian>* target,
5551 Sized_relobj_file<size, big_endian>* object,
5552 unsigned int data_shndx,
5553 Output_section* output_section,
5554 const elfcpp::Rela<size, big_endian>& reloc,
5555 unsigned int r_type,
5556 const elfcpp::Sym<size, big_endian>& lsym,
5559 this->maybe_skip_tls_get_addr_call(r_type, NULL);
5561 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5562 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5564 this->expect_tls_get_addr_call();
5565 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5566 if (tls_type != tls::TLSOPT_NONE)
5567 this->skip_next_tls_get_addr_call();
5569 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5570 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5572 this->expect_tls_get_addr_call();
5573 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5574 if (tls_type != tls::TLSOPT_NONE)
5575 this->skip_next_tls_get_addr_call();
5578 Powerpc_relobj<size, big_endian>* ppc_object
5579 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5584 && data_shndx == ppc_object->opd_shndx()
5585 && r_type == elfcpp::R_PPC64_ADDR64)
5586 ppc_object->set_opd_discard(reloc.get_r_offset());
5590 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5591 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
5592 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5594 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5595 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5596 r_type, r_sym, reloc.get_r_addend());
5597 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
5602 case elfcpp::R_POWERPC_NONE:
5603 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5604 case elfcpp::R_POWERPC_GNU_VTENTRY:
5605 case elfcpp::R_PPC64_TOCSAVE:
5606 case elfcpp::R_POWERPC_TLS:
5609 case elfcpp::R_PPC64_TOC:
5611 Output_data_got_powerpc<size, big_endian>* got
5612 = target->got_section(symtab, layout);
5613 if (parameters->options().output_is_position_independent())
5615 Address off = reloc.get_r_offset();
5617 && target->abiversion() < 2
5618 && data_shndx == ppc_object->opd_shndx()
5619 && ppc_object->get_opd_discard(off - 8))
5622 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5623 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5624 rela_dyn->add_output_section_relative(got->output_section(),
5625 elfcpp::R_POWERPC_RELATIVE,
5627 object, data_shndx, off,
5628 symobj->toc_base_offset());
5633 case elfcpp::R_PPC64_ADDR64:
5634 case elfcpp::R_PPC64_UADDR64:
5635 case elfcpp::R_POWERPC_ADDR32:
5636 case elfcpp::R_POWERPC_UADDR32:
5637 case elfcpp::R_POWERPC_ADDR24:
5638 case elfcpp::R_POWERPC_ADDR16:
5639 case elfcpp::R_POWERPC_ADDR16_LO:
5640 case elfcpp::R_POWERPC_ADDR16_HI:
5641 case elfcpp::R_POWERPC_ADDR16_HA:
5642 case elfcpp::R_POWERPC_UADDR16:
5643 case elfcpp::R_PPC64_ADDR16_HIGH:
5644 case elfcpp::R_PPC64_ADDR16_HIGHA:
5645 case elfcpp::R_PPC64_ADDR16_HIGHER:
5646 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5647 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5648 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5649 case elfcpp::R_PPC64_ADDR16_DS:
5650 case elfcpp::R_PPC64_ADDR16_LO_DS:
5651 case elfcpp::R_POWERPC_ADDR14:
5652 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5653 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5654 // If building a shared library (or a position-independent
5655 // executable), we need to create a dynamic relocation for
5657 if (parameters->options().output_is_position_independent()
5658 || (size == 64 && is_ifunc && target->abiversion() < 2))
5660 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5662 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5663 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
5664 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
5666 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5667 : elfcpp::R_POWERPC_RELATIVE);
5668 rela_dyn->add_local_relative(object, r_sym, dynrel,
5669 output_section, data_shndx,
5670 reloc.get_r_offset(),
5671 reloc.get_r_addend(), false);
5673 else if (lsym.get_st_type() != elfcpp::STT_SECTION)
5675 check_non_pic(object, r_type);
5676 rela_dyn->add_local(object, r_sym, r_type, output_section,
5677 data_shndx, reloc.get_r_offset(),
5678 reloc.get_r_addend());
5682 gold_assert(lsym.get_st_value() == 0);
5683 unsigned int shndx = lsym.get_st_shndx();
5685 shndx = object->adjust_sym_shndx(r_sym, shndx,
5688 object->error(_("section symbol %u has bad shndx %u"),
5691 rela_dyn->add_local_section(object, shndx, r_type,
5692 output_section, data_shndx,
5693 reloc.get_r_offset());
5698 case elfcpp::R_POWERPC_REL24:
5699 case elfcpp::R_PPC_PLTREL24:
5700 case elfcpp::R_PPC_LOCAL24PC:
5701 case elfcpp::R_POWERPC_REL14:
5702 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5703 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5705 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5706 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5707 reloc.get_r_addend());
5710 case elfcpp::R_PPC64_REL64:
5711 case elfcpp::R_POWERPC_REL32:
5712 case elfcpp::R_POWERPC_REL16:
5713 case elfcpp::R_POWERPC_REL16_LO:
5714 case elfcpp::R_POWERPC_REL16_HI:
5715 case elfcpp::R_POWERPC_REL16_HA:
5716 case elfcpp::R_POWERPC_REL16DX_HA:
5717 case elfcpp::R_POWERPC_SECTOFF:
5718 case elfcpp::R_POWERPC_SECTOFF_LO:
5719 case elfcpp::R_POWERPC_SECTOFF_HI:
5720 case elfcpp::R_POWERPC_SECTOFF_HA:
5721 case elfcpp::R_PPC64_SECTOFF_DS:
5722 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5723 case elfcpp::R_POWERPC_TPREL16:
5724 case elfcpp::R_POWERPC_TPREL16_LO:
5725 case elfcpp::R_POWERPC_TPREL16_HI:
5726 case elfcpp::R_POWERPC_TPREL16_HA:
5727 case elfcpp::R_PPC64_TPREL16_DS:
5728 case elfcpp::R_PPC64_TPREL16_LO_DS:
5729 case elfcpp::R_PPC64_TPREL16_HIGH:
5730 case elfcpp::R_PPC64_TPREL16_HIGHA:
5731 case elfcpp::R_PPC64_TPREL16_HIGHER:
5732 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5733 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5734 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5735 case elfcpp::R_POWERPC_DTPREL16:
5736 case elfcpp::R_POWERPC_DTPREL16_LO:
5737 case elfcpp::R_POWERPC_DTPREL16_HI:
5738 case elfcpp::R_POWERPC_DTPREL16_HA:
5739 case elfcpp::R_PPC64_DTPREL16_DS:
5740 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5741 case elfcpp::R_PPC64_DTPREL16_HIGH:
5742 case elfcpp::R_PPC64_DTPREL16_HIGHA:
5743 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5744 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5745 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5746 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5747 case elfcpp::R_PPC64_TLSGD:
5748 case elfcpp::R_PPC64_TLSLD:
5749 case elfcpp::R_PPC64_ADDR64_LOCAL:
5752 case elfcpp::R_POWERPC_GOT16:
5753 case elfcpp::R_POWERPC_GOT16_LO:
5754 case elfcpp::R_POWERPC_GOT16_HI:
5755 case elfcpp::R_POWERPC_GOT16_HA:
5756 case elfcpp::R_PPC64_GOT16_DS:
5757 case elfcpp::R_PPC64_GOT16_LO_DS:
5759 // The symbol requires a GOT entry.
5760 Output_data_got_powerpc<size, big_endian>* got
5761 = target->got_section(symtab, layout);
5762 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5764 if (!parameters->options().output_is_position_independent())
5767 && (size == 32 || target->abiversion() >= 2))
5768 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
5770 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
5772 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
5774 // If we are generating a shared object or a pie, this
5775 // symbol's GOT entry will be set by a dynamic relocation.
5777 off = got->add_constant(0);
5778 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
5780 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5782 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5783 : elfcpp::R_POWERPC_RELATIVE);
5784 rela_dyn->add_local_relative(object, r_sym, dynrel,
5785 got, off, 0, false);
5790 case elfcpp::R_PPC64_TOC16:
5791 case elfcpp::R_PPC64_TOC16_LO:
5792 case elfcpp::R_PPC64_TOC16_HI:
5793 case elfcpp::R_PPC64_TOC16_HA:
5794 case elfcpp::R_PPC64_TOC16_DS:
5795 case elfcpp::R_PPC64_TOC16_LO_DS:
5796 // We need a GOT section.
5797 target->got_section(symtab, layout);
5800 case elfcpp::R_POWERPC_GOT_TLSGD16:
5801 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5802 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5803 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5805 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5806 if (tls_type == tls::TLSOPT_NONE)
5808 Output_data_got_powerpc<size, big_endian>* got
5809 = target->got_section(symtab, layout);
5810 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5811 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5812 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
5813 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
5815 else if (tls_type == tls::TLSOPT_TO_LE)
5817 // no GOT relocs needed for Local Exec.
5824 case elfcpp::R_POWERPC_GOT_TLSLD16:
5825 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5826 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5827 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5829 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5830 if (tls_type == tls::TLSOPT_NONE)
5831 target->tlsld_got_offset(symtab, layout, object);
5832 else if (tls_type == tls::TLSOPT_TO_LE)
5834 // no GOT relocs needed for Local Exec.
5835 if (parameters->options().emit_relocs())
5837 Output_section* os = layout->tls_segment()->first_section();
5838 gold_assert(os != NULL);
5839 os->set_needs_symtab_index();
5847 case elfcpp::R_POWERPC_GOT_DTPREL16:
5848 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5849 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5850 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5852 Output_data_got_powerpc<size, big_endian>* got
5853 = target->got_section(symtab, layout);
5854 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5855 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
5859 case elfcpp::R_POWERPC_GOT_TPREL16:
5860 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5861 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5862 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5864 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
5865 if (tls_type == tls::TLSOPT_NONE)
5867 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5868 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
5870 Output_data_got_powerpc<size, big_endian>* got
5871 = target->got_section(symtab, layout);
5872 unsigned int off = got->add_constant(0);
5873 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
5875 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5876 rela_dyn->add_symbolless_local_addend(object, r_sym,
5877 elfcpp::R_POWERPC_TPREL,
5881 else if (tls_type == tls::TLSOPT_TO_LE)
5883 // no GOT relocs needed for Local Exec.
5891 unsupported_reloc_local(object, r_type);
5897 case elfcpp::R_POWERPC_GOT_TLSLD16:
5898 case elfcpp::R_POWERPC_GOT_TLSGD16:
5899 case elfcpp::R_POWERPC_GOT_TPREL16:
5900 case elfcpp::R_POWERPC_GOT_DTPREL16:
5901 case elfcpp::R_POWERPC_GOT16:
5902 case elfcpp::R_PPC64_GOT16_DS:
5903 case elfcpp::R_PPC64_TOC16:
5904 case elfcpp::R_PPC64_TOC16_DS:
5905 ppc_object->set_has_small_toc_reloc();
5911 // Report an unsupported relocation against a global symbol.
5913 template<int size, bool big_endian>
5915 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
5916 Sized_relobj_file<size, big_endian>* object,
5917 unsigned int r_type,
5920 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5921 object->name().c_str(), r_type, gsym->demangled_name().c_str());
5924 // Scan a relocation for a global symbol.
5926 template<int size, bool big_endian>
5928 Target_powerpc<size, big_endian>::Scan::global(
5929 Symbol_table* symtab,
5931 Target_powerpc<size, big_endian>* target,
5932 Sized_relobj_file<size, big_endian>* object,
5933 unsigned int data_shndx,
5934 Output_section* output_section,
5935 const elfcpp::Rela<size, big_endian>& reloc,
5936 unsigned int r_type,
5939 if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP)
5942 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5943 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5945 this->expect_tls_get_addr_call();
5946 const bool final = gsym->final_value_is_known();
5947 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5948 if (tls_type != tls::TLSOPT_NONE)
5949 this->skip_next_tls_get_addr_call();
5951 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5952 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5954 this->expect_tls_get_addr_call();
5955 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5956 if (tls_type != tls::TLSOPT_NONE)
5957 this->skip_next_tls_get_addr_call();
5960 Powerpc_relobj<size, big_endian>* ppc_object
5961 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5963 // A STT_GNU_IFUNC symbol may require a PLT entry.
5964 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
5965 bool pushed_ifunc = false;
5966 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5968 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5969 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5970 reloc.get_r_addend());
5971 target->make_plt_entry(symtab, layout, gsym);
5972 pushed_ifunc = true;
5977 case elfcpp::R_POWERPC_NONE:
5978 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5979 case elfcpp::R_POWERPC_GNU_VTENTRY:
5980 case elfcpp::R_PPC_LOCAL24PC:
5981 case elfcpp::R_POWERPC_TLS:
5984 case elfcpp::R_PPC64_TOC:
5986 Output_data_got_powerpc<size, big_endian>* got
5987 = target->got_section(symtab, layout);
5988 if (parameters->options().output_is_position_independent())
5990 Address off = reloc.get_r_offset();
5992 && data_shndx == ppc_object->opd_shndx()
5993 && ppc_object->get_opd_discard(off - 8))
5996 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5997 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5998 if (data_shndx != ppc_object->opd_shndx())
5999 symobj = static_cast
6000 <Powerpc_relobj<size, big_endian>*>(gsym->object());
6001 rela_dyn->add_output_section_relative(got->output_section(),
6002 elfcpp::R_POWERPC_RELATIVE,
6004 object, data_shndx, off,
6005 symobj->toc_base_offset());
6010 case elfcpp::R_PPC64_ADDR64:
6012 && target->abiversion() < 2
6013 && data_shndx == ppc_object->opd_shndx()
6014 && (gsym->is_defined_in_discarded_section()
6015 || gsym->object() != object))
6017 ppc_object->set_opd_discard(reloc.get_r_offset());
6021 case elfcpp::R_PPC64_UADDR64:
6022 case elfcpp::R_POWERPC_ADDR32:
6023 case elfcpp::R_POWERPC_UADDR32:
6024 case elfcpp::R_POWERPC_ADDR24:
6025 case elfcpp::R_POWERPC_ADDR16:
6026 case elfcpp::R_POWERPC_ADDR16_LO:
6027 case elfcpp::R_POWERPC_ADDR16_HI:
6028 case elfcpp::R_POWERPC_ADDR16_HA:
6029 case elfcpp::R_POWERPC_UADDR16:
6030 case elfcpp::R_PPC64_ADDR16_HIGH:
6031 case elfcpp::R_PPC64_ADDR16_HIGHA:
6032 case elfcpp::R_PPC64_ADDR16_HIGHER:
6033 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6034 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6035 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6036 case elfcpp::R_PPC64_ADDR16_DS:
6037 case elfcpp::R_PPC64_ADDR16_LO_DS:
6038 case elfcpp::R_POWERPC_ADDR14:
6039 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6040 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6042 // Make a PLT entry if necessary.
6043 if (gsym->needs_plt_entry())
6045 // Since this is not a PC-relative relocation, we may be
6046 // taking the address of a function. In that case we need to
6047 // set the entry in the dynamic symbol table to the address of
6048 // the PLT call stub.
6049 bool need_ifunc_plt = false;
6050 if ((size == 32 || target->abiversion() >= 2)
6051 && gsym->is_from_dynobj()
6052 && !parameters->options().output_is_position_independent())
6054 gsym->set_needs_dynsym_value();
6055 need_ifunc_plt = true;
6057 if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt))
6059 target->push_branch(ppc_object, data_shndx,
6060 reloc.get_r_offset(), r_type,
6061 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6062 reloc.get_r_addend());
6063 target->make_plt_entry(symtab, layout, gsym);
6066 // Make a dynamic relocation if necessary.
6067 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))
6068 || (size == 64 && is_ifunc && target->abiversion() < 2))
6070 if (!parameters->options().output_is_position_independent()
6071 && gsym->may_need_copy_reloc())
6073 target->copy_reloc(symtab, layout, object,
6074 data_shndx, output_section, gsym, reloc);
6076 else if ((((size == 32
6077 && r_type == elfcpp::R_POWERPC_ADDR32)
6079 && r_type == elfcpp::R_PPC64_ADDR64
6080 && target->abiversion() >= 2))
6081 && gsym->can_use_relative_reloc(false)
6082 && !(gsym->visibility() == elfcpp::STV_PROTECTED
6083 && parameters->options().shared()))
6085 && r_type == elfcpp::R_PPC64_ADDR64
6086 && target->abiversion() < 2
6087 && (gsym->can_use_relative_reloc(false)
6088 || data_shndx == ppc_object->opd_shndx())))
6090 Reloc_section* rela_dyn
6091 = target->rela_dyn_section(symtab, layout, is_ifunc);
6092 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6093 : elfcpp::R_POWERPC_RELATIVE);
6094 rela_dyn->add_symbolless_global_addend(
6095 gsym, dynrel, output_section, object, data_shndx,
6096 reloc.get_r_offset(), reloc.get_r_addend());
6100 Reloc_section* rela_dyn
6101 = target->rela_dyn_section(symtab, layout, is_ifunc);
6102 check_non_pic(object, r_type);
6103 rela_dyn->add_global(gsym, r_type, output_section,
6105 reloc.get_r_offset(),
6106 reloc.get_r_addend());
6112 case elfcpp::R_PPC_PLTREL24:
6113 case elfcpp::R_POWERPC_REL24:
6116 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6118 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6119 reloc.get_r_addend());
6120 if (gsym->needs_plt_entry()
6121 || (!gsym->final_value_is_known()
6122 && (gsym->is_undefined()
6123 || gsym->is_from_dynobj()
6124 || gsym->is_preemptible())))
6125 target->make_plt_entry(symtab, layout, gsym);
6129 case elfcpp::R_PPC64_REL64:
6130 case elfcpp::R_POWERPC_REL32:
6131 // Make a dynamic relocation if necessary.
6132 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)))
6134 if (!parameters->options().output_is_position_independent()
6135 && gsym->may_need_copy_reloc())
6137 target->copy_reloc(symtab, layout, object,
6138 data_shndx, output_section, gsym,
6143 Reloc_section* rela_dyn
6144 = target->rela_dyn_section(symtab, layout, is_ifunc);
6145 check_non_pic(object, r_type);
6146 rela_dyn->add_global(gsym, r_type, output_section, object,
6147 data_shndx, reloc.get_r_offset(),
6148 reloc.get_r_addend());
6153 case elfcpp::R_POWERPC_REL14:
6154 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6155 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6157 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6158 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6159 reloc.get_r_addend());
6162 case elfcpp::R_POWERPC_REL16:
6163 case elfcpp::R_POWERPC_REL16_LO:
6164 case elfcpp::R_POWERPC_REL16_HI:
6165 case elfcpp::R_POWERPC_REL16_HA:
6166 case elfcpp::R_POWERPC_REL16DX_HA:
6167 case elfcpp::R_POWERPC_SECTOFF:
6168 case elfcpp::R_POWERPC_SECTOFF_LO:
6169 case elfcpp::R_POWERPC_SECTOFF_HI:
6170 case elfcpp::R_POWERPC_SECTOFF_HA:
6171 case elfcpp::R_PPC64_SECTOFF_DS:
6172 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6173 case elfcpp::R_POWERPC_TPREL16:
6174 case elfcpp::R_POWERPC_TPREL16_LO:
6175 case elfcpp::R_POWERPC_TPREL16_HI:
6176 case elfcpp::R_POWERPC_TPREL16_HA:
6177 case elfcpp::R_PPC64_TPREL16_DS:
6178 case elfcpp::R_PPC64_TPREL16_LO_DS:
6179 case elfcpp::R_PPC64_TPREL16_HIGH:
6180 case elfcpp::R_PPC64_TPREL16_HIGHA:
6181 case elfcpp::R_PPC64_TPREL16_HIGHER:
6182 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6183 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6184 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6185 case elfcpp::R_POWERPC_DTPREL16:
6186 case elfcpp::R_POWERPC_DTPREL16_LO:
6187 case elfcpp::R_POWERPC_DTPREL16_HI:
6188 case elfcpp::R_POWERPC_DTPREL16_HA:
6189 case elfcpp::R_PPC64_DTPREL16_DS:
6190 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6191 case elfcpp::R_PPC64_DTPREL16_HIGH:
6192 case elfcpp::R_PPC64_DTPREL16_HIGHA:
6193 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6194 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6195 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6196 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6197 case elfcpp::R_PPC64_TLSGD:
6198 case elfcpp::R_PPC64_TLSLD:
6199 case elfcpp::R_PPC64_ADDR64_LOCAL:
6202 case elfcpp::R_POWERPC_GOT16:
6203 case elfcpp::R_POWERPC_GOT16_LO:
6204 case elfcpp::R_POWERPC_GOT16_HI:
6205 case elfcpp::R_POWERPC_GOT16_HA:
6206 case elfcpp::R_PPC64_GOT16_DS:
6207 case elfcpp::R_PPC64_GOT16_LO_DS:
6209 // The symbol requires a GOT entry.
6210 Output_data_got_powerpc<size, big_endian>* got;
6212 got = target->got_section(symtab, layout);
6213 if (gsym->final_value_is_known())
6216 && (size == 32 || target->abiversion() >= 2))
6217 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
6219 got->add_global(gsym, GOT_TYPE_STANDARD);
6221 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
6223 // If we are generating a shared object or a pie, this
6224 // symbol's GOT entry will be set by a dynamic relocation.
6225 unsigned int off = got->add_constant(0);
6226 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
6228 Reloc_section* rela_dyn
6229 = target->rela_dyn_section(symtab, layout, is_ifunc);
6231 if (gsym->can_use_relative_reloc(false)
6233 || target->abiversion() >= 2)
6234 && gsym->visibility() == elfcpp::STV_PROTECTED
6235 && parameters->options().shared()))
6237 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6238 : elfcpp::R_POWERPC_RELATIVE);
6239 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
6243 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
6244 rela_dyn->add_global(gsym, dynrel, got, off, 0);
6250 case elfcpp::R_PPC64_TOC16:
6251 case elfcpp::R_PPC64_TOC16_LO:
6252 case elfcpp::R_PPC64_TOC16_HI:
6253 case elfcpp::R_PPC64_TOC16_HA:
6254 case elfcpp::R_PPC64_TOC16_DS:
6255 case elfcpp::R_PPC64_TOC16_LO_DS:
6256 // We need a GOT section.
6257 target->got_section(symtab, layout);
6260 case elfcpp::R_POWERPC_GOT_TLSGD16:
6261 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6262 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6263 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6265 const bool final = gsym->final_value_is_known();
6266 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6267 if (tls_type == tls::TLSOPT_NONE)
6269 Output_data_got_powerpc<size, big_endian>* got
6270 = target->got_section(symtab, layout);
6271 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6272 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn,
6273 elfcpp::R_POWERPC_DTPMOD,
6274 elfcpp::R_POWERPC_DTPREL);
6276 else if (tls_type == tls::TLSOPT_TO_IE)
6278 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6280 Output_data_got_powerpc<size, big_endian>* got
6281 = target->got_section(symtab, layout);
6282 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6283 if (gsym->is_undefined()
6284 || gsym->is_from_dynobj())
6286 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6287 elfcpp::R_POWERPC_TPREL);
6291 unsigned int off = got->add_constant(0);
6292 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6293 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6294 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6299 else if (tls_type == tls::TLSOPT_TO_LE)
6301 // no GOT relocs needed for Local Exec.
6308 case elfcpp::R_POWERPC_GOT_TLSLD16:
6309 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6310 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6311 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6313 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6314 if (tls_type == tls::TLSOPT_NONE)
6315 target->tlsld_got_offset(symtab, layout, object);
6316 else if (tls_type == tls::TLSOPT_TO_LE)
6318 // no GOT relocs needed for Local Exec.
6319 if (parameters->options().emit_relocs())
6321 Output_section* os = layout->tls_segment()->first_section();
6322 gold_assert(os != NULL);
6323 os->set_needs_symtab_index();
6331 case elfcpp::R_POWERPC_GOT_DTPREL16:
6332 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6333 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6334 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6336 Output_data_got_powerpc<size, big_endian>* got
6337 = target->got_section(symtab, layout);
6338 if (!gsym->final_value_is_known()
6339 && (gsym->is_from_dynobj()
6340 || gsym->is_undefined()
6341 || gsym->is_preemptible()))
6342 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
6343 target->rela_dyn_section(layout),
6344 elfcpp::R_POWERPC_DTPREL);
6346 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
6350 case elfcpp::R_POWERPC_GOT_TPREL16:
6351 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6352 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6353 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6355 const bool final = gsym->final_value_is_known();
6356 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6357 if (tls_type == tls::TLSOPT_NONE)
6359 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6361 Output_data_got_powerpc<size, big_endian>* got
6362 = target->got_section(symtab, layout);
6363 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6364 if (gsym->is_undefined()
6365 || gsym->is_from_dynobj())
6367 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6368 elfcpp::R_POWERPC_TPREL);
6372 unsigned int off = got->add_constant(0);
6373 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6374 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6375 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6380 else if (tls_type == tls::TLSOPT_TO_LE)
6382 // no GOT relocs needed for Local Exec.
6390 unsupported_reloc_global(object, r_type, gsym);
6396 case elfcpp::R_POWERPC_GOT_TLSLD16:
6397 case elfcpp::R_POWERPC_GOT_TLSGD16:
6398 case elfcpp::R_POWERPC_GOT_TPREL16:
6399 case elfcpp::R_POWERPC_GOT_DTPREL16:
6400 case elfcpp::R_POWERPC_GOT16:
6401 case elfcpp::R_PPC64_GOT16_DS:
6402 case elfcpp::R_PPC64_TOC16:
6403 case elfcpp::R_PPC64_TOC16_DS:
6404 ppc_object->set_has_small_toc_reloc();
6410 // Process relocations for gc.
6412 template<int size, bool big_endian>
6414 Target_powerpc<size, big_endian>::gc_process_relocs(
6415 Symbol_table* symtab,
6417 Sized_relobj_file<size, big_endian>* object,
6418 unsigned int data_shndx,
6420 const unsigned char* prelocs,
6422 Output_section* output_section,
6423 bool needs_special_offset_handling,
6424 size_t local_symbol_count,
6425 const unsigned char* plocal_symbols)
6427 typedef Target_powerpc<size, big_endian> Powerpc;
6428 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6429 Powerpc_relobj<size, big_endian>* ppc_object
6430 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
6432 ppc_object->set_opd_valid();
6433 if (size == 64 && data_shndx == ppc_object->opd_shndx())
6435 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
6436 for (p = ppc_object->access_from_map()->begin();
6437 p != ppc_object->access_from_map()->end();
6440 Address dst_off = p->first;
6441 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6442 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
6443 for (s = p->second.begin(); s != p->second.end(); ++s)
6445 Relobj* src_obj = s->first;
6446 unsigned int src_indx = s->second;
6447 symtab->gc()->add_reference(src_obj, src_indx,
6448 ppc_object, dst_indx);
6452 ppc_object->access_from_map()->clear();
6453 ppc_object->process_gc_mark(symtab);
6454 // Don't look at .opd relocs as .opd will reference everything.
6458 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
6459 typename Target_powerpc::Relocatable_size_for_reloc>(
6468 needs_special_offset_handling,
6473 // Handle target specific gc actions when adding a gc reference from
6474 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6475 // and DST_OFF. For powerpc64, this adds a referenc to the code
6476 // section of a function descriptor.
6478 template<int size, bool big_endian>
6480 Target_powerpc<size, big_endian>::do_gc_add_reference(
6481 Symbol_table* symtab,
6483 unsigned int src_shndx,
6485 unsigned int dst_shndx,
6486 Address dst_off) const
6488 if (size != 64 || dst_obj->is_dynamic())
6491 Powerpc_relobj<size, big_endian>* ppc_object
6492 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
6493 if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
6495 if (ppc_object->opd_valid())
6497 dst_shndx = ppc_object->get_opd_ent(dst_off);
6498 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
6502 // If we haven't run scan_opd_relocs, we must delay
6503 // processing this function descriptor reference.
6504 ppc_object->add_reference(src_obj, src_shndx, dst_off);
6509 // Add any special sections for this symbol to the gc work list.
6510 // For powerpc64, this adds the code section of a function
6513 template<int size, bool big_endian>
6515 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
6516 Symbol_table* symtab,
6521 Powerpc_relobj<size, big_endian>* ppc_object
6522 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
6524 unsigned int shndx = sym->shndx(&is_ordinary);
6525 if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
6527 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
6528 Address dst_off = gsym->value();
6529 if (ppc_object->opd_valid())
6531 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6532 symtab->gc()->worklist().push_back(Section_id(ppc_object,
6536 ppc_object->add_gc_mark(dst_off);
6541 // For a symbol location in .opd, set LOC to the location of the
6544 template<int size, bool big_endian>
6546 Target_powerpc<size, big_endian>::do_function_location(
6547 Symbol_location* loc) const
6549 if (size == 64 && loc->shndx != 0)
6551 if (loc->object->is_dynamic())
6553 Powerpc_dynobj<size, big_endian>* ppc_object
6554 = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
6555 if (loc->shndx == ppc_object->opd_shndx())
6558 Address off = loc->offset - ppc_object->opd_address();
6559 loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
6560 loc->offset = dest_off;
6565 const Powerpc_relobj<size, big_endian>* ppc_object
6566 = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
6567 if (loc->shndx == ppc_object->opd_shndx())
6570 loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
6571 loc->offset = dest_off;
6577 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6578 // compiled with -fsplit-stack. The function calls non-split-stack
6579 // code. Change the function to ensure it has enough stack space to
6580 // call some random function.
6582 template<int size, bool big_endian>
6584 Target_powerpc<size, big_endian>::do_calls_non_split(
6587 section_offset_type fnoffset,
6588 section_size_type fnsize,
6589 unsigned char* view,
6590 section_size_type view_size,
6592 std::string* to) const
6594 // 32-bit not supported.
6598 Target::do_calls_non_split(object, shndx, fnoffset, fnsize,
6599 view, view_size, from, to);
6603 // The function always starts with
6604 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6605 // addis %r12,%r1,-allocate@ha
6606 // addi %r12,%r12,-allocate@l
6608 // but note that the addis or addi may be replaced with a nop
6610 unsigned char *entry = view + fnoffset;
6611 uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry);
6613 if ((insn & 0xffff0000) == addis_2_12)
6615 /* Skip ELFv2 global entry code. */
6617 insn = elfcpp::Swap<32, big_endian>::readval(entry);
6620 unsigned char *pinsn = entry;
6622 const uint32_t ld_private_ss = 0xe80d8fc0;
6623 if (insn == ld_private_ss)
6625 int32_t allocate = 0;
6629 insn = elfcpp::Swap<32, big_endian>::readval(pinsn);
6630 if ((insn & 0xffff0000) == addis_12_1)
6631 allocate += (insn & 0xffff) << 16;
6632 else if ((insn & 0xffff0000) == addi_12_1
6633 || (insn & 0xffff0000) == addi_12_12)
6634 allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000;
6635 else if (insn != nop)
6638 if (insn == cmpld_7_12_0 && pinsn == entry + 12)
6640 int extra = parameters->options().split_stack_adjust_size();
6642 if (allocate >= 0 || extra < 0)
6644 object->error(_("split-stack stack size overflow at "
6645 "section %u offset %0zx"),
6646 shndx, static_cast<size_t>(fnoffset));
6650 insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff);
6651 if (insn != addis_12_1)
6653 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6655 insn = addi_12_12 | (allocate & 0xffff);
6656 if (insn != addi_12_12)
6658 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6664 insn = addi_12_1 | (allocate & 0xffff);
6665 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6668 if (pinsn != entry + 12)
6669 elfcpp::Swap<32, big_endian>::writeval(pinsn, nop);
6677 if (!object->has_no_split_stack())
6678 object->error(_("failed to match split-stack sequence at "
6679 "section %u offset %0zx"),
6680 shndx, static_cast<size_t>(fnoffset));
6684 // Scan relocations for a section.
6686 template<int size, bool big_endian>
6688 Target_powerpc<size, big_endian>::scan_relocs(
6689 Symbol_table* symtab,
6691 Sized_relobj_file<size, big_endian>* object,
6692 unsigned int data_shndx,
6693 unsigned int sh_type,
6694 const unsigned char* prelocs,
6696 Output_section* output_section,
6697 bool needs_special_offset_handling,
6698 size_t local_symbol_count,
6699 const unsigned char* plocal_symbols)
6701 typedef Target_powerpc<size, big_endian> Powerpc;
6702 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6704 if (sh_type == elfcpp::SHT_REL)
6706 gold_error(_("%s: unsupported REL reloc section"),
6707 object->name().c_str());
6711 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
6720 needs_special_offset_handling,
6725 // Functor class for processing the global symbol table.
6726 // Removes symbols defined on discarded opd entries.
6728 template<bool big_endian>
6729 class Global_symbol_visitor_opd
6732 Global_symbol_visitor_opd()
6736 operator()(Sized_symbol<64>* sym)
6738 if (sym->has_symtab_index()
6739 || sym->source() != Symbol::FROM_OBJECT
6740 || !sym->in_real_elf())
6743 if (sym->object()->is_dynamic())
6746 Powerpc_relobj<64, big_endian>* symobj
6747 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
6748 if (symobj->opd_shndx() == 0)
6752 unsigned int shndx = sym->shndx(&is_ordinary);
6753 if (shndx == symobj->opd_shndx()
6754 && symobj->get_opd_discard(sym->value()))
6756 sym->set_undefined();
6757 sym->set_visibility(elfcpp::STV_DEFAULT);
6758 sym->set_is_defined_in_discarded_section();
6759 sym->set_symtab_index(-1U);
6764 template<int size, bool big_endian>
6766 Target_powerpc<size, big_endian>::define_save_restore_funcs(
6768 Symbol_table* symtab)
6772 Output_data_save_res<size, big_endian>* savres
6773 = new Output_data_save_res<size, big_endian>(symtab);
6774 this->savres_section_ = savres;
6775 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
6776 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
6777 savres, ORDER_TEXT, false);
6781 // Sort linker created .got section first (for the header), then input
6782 // sections belonging to files using small model code.
6784 template<bool big_endian>
6785 class Sort_toc_sections
6789 operator()(const Output_section::Input_section& is1,
6790 const Output_section::Input_section& is2) const
6792 if (!is1.is_input_section() && is2.is_input_section())
6795 = (is1.is_input_section()
6796 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
6797 ->has_small_toc_reloc()));
6799 = (is2.is_input_section()
6800 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
6801 ->has_small_toc_reloc()));
6802 return small1 && !small2;
6806 // Finalize the sections.
6808 template<int size, bool big_endian>
6810 Target_powerpc<size, big_endian>::do_finalize_sections(
6812 const Input_objects*,
6813 Symbol_table* symtab)
6815 if (parameters->doing_static_link())
6817 // At least some versions of glibc elf-init.o have a strong
6818 // reference to __rela_iplt marker syms. A weak ref would be
6820 if (this->iplt_ != NULL)
6822 Reloc_section* rel = this->iplt_->rel_plt();
6823 symtab->define_in_output_data("__rela_iplt_start", NULL,
6824 Symbol_table::PREDEFINED, rel, 0, 0,
6825 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6826 elfcpp::STV_HIDDEN, 0, false, true);
6827 symtab->define_in_output_data("__rela_iplt_end", NULL,
6828 Symbol_table::PREDEFINED, rel, 0, 0,
6829 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6830 elfcpp::STV_HIDDEN, 0, true, true);
6834 symtab->define_as_constant("__rela_iplt_start", NULL,
6835 Symbol_table::PREDEFINED, 0, 0,
6836 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6837 elfcpp::STV_HIDDEN, 0, true, false);
6838 symtab->define_as_constant("__rela_iplt_end", NULL,
6839 Symbol_table::PREDEFINED, 0, 0,
6840 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6841 elfcpp::STV_HIDDEN, 0, true, false);
6847 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
6848 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
6850 if (!parameters->options().relocatable())
6852 this->define_save_restore_funcs(layout, symtab);
6854 // Annoyingly, we need to make these sections now whether or
6855 // not we need them. If we delay until do_relax then we
6856 // need to mess with the relaxation machinery checkpointing.
6857 this->got_section(symtab, layout);
6858 this->make_brlt_section(layout);
6860 if (parameters->options().toc_sort())
6862 Output_section* os = this->got_->output_section();
6863 if (os != NULL && os->input_sections().size() > 1)
6864 std::stable_sort(os->input_sections().begin(),
6865 os->input_sections().end(),
6866 Sort_toc_sections<big_endian>());
6871 // Fill in some more dynamic tags.
6872 Output_data_dynamic* odyn = layout->dynamic_data();
6875 const Reloc_section* rel_plt = (this->plt_ == NULL
6877 : this->plt_->rel_plt());
6878 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
6879 this->rela_dyn_, true, size == 32);
6883 if (this->got_ != NULL)
6885 this->got_->finalize_data_size();
6886 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
6887 this->got_, this->got_->g_o_t());
6892 if (this->glink_ != NULL)
6894 this->glink_->finalize_data_size();
6895 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
6897 (this->glink_->pltresolve_size
6903 // Emit any relocs we saved in an attempt to avoid generating COPY
6905 if (this->copy_relocs_.any_saved_relocs())
6906 this->copy_relocs_.emit(this->rela_dyn_section(layout));
6909 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6913 ok_lo_toc_insn(uint32_t insn)
6915 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6916 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6917 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6918 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6919 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6920 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6921 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6922 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6923 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6924 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6925 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6926 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6927 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6928 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6929 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6931 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6932 && ((insn & 3) == 0 || (insn & 3) == 3))
6933 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
6936 // Return the value to use for a branch relocation.
6938 template<int size, bool big_endian>
6940 Target_powerpc<size, big_endian>::symval_for_branch(
6941 const Symbol_table* symtab,
6942 const Sized_symbol<size>* gsym,
6943 Powerpc_relobj<size, big_endian>* object,
6945 unsigned int *dest_shndx)
6947 if (size == 32 || this->abiversion() >= 2)
6951 // If the symbol is defined in an opd section, ie. is a function
6952 // descriptor, use the function descriptor code entry address
6953 Powerpc_relobj<size, big_endian>* symobj = object;
6955 && gsym->source() != Symbol::FROM_OBJECT)
6958 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
6959 unsigned int shndx = symobj->opd_shndx();
6962 Address opd_addr = symobj->get_output_section_offset(shndx);
6963 if (opd_addr == invalid_address)
6965 opd_addr += symobj->output_section_address(shndx);
6966 if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx))
6969 *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off);
6970 if (symtab->is_section_folded(symobj, *dest_shndx))
6973 = symtab->icf()->get_folded_section(symobj, *dest_shndx);
6974 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
6975 *dest_shndx = folded.second;
6977 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
6978 if (sec_addr == invalid_address)
6981 sec_addr += symobj->output_section(*dest_shndx)->address();
6982 *value = sec_addr + sec_off;
6987 // Perform a relocation.
6989 template<int size, bool big_endian>
6991 Target_powerpc<size, big_endian>::Relocate::relocate(
6992 const Relocate_info<size, big_endian>* relinfo,
6993 Target_powerpc* target,
6996 const elfcpp::Rela<size, big_endian>& rela,
6997 unsigned int r_type,
6998 const Sized_symbol<size>* gsym,
6999 const Symbol_value<size>* psymval,
7000 unsigned char* view,
7002 section_size_type view_size)
7007 switch (this->maybe_skip_tls_get_addr_call(r_type, gsym))
7009 case Track_tls::NOT_EXPECTED:
7010 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7011 _("__tls_get_addr call lacks marker reloc"));
7013 case Track_tls::EXPECTED:
7014 // We have already complained.
7016 case Track_tls::SKIP:
7018 case Track_tls::NORMAL:
7022 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
7023 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
7024 Powerpc_relobj<size, big_endian>* const object
7025 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
7027 bool has_stub_value = false;
7028 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7030 ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
7031 : object->local_has_plt_offset(r_sym))
7032 && (!psymval->is_ifunc_symbol()
7033 || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false)))
7037 && target->abiversion() >= 2
7038 && !parameters->options().output_is_position_independent()
7039 && !is_branch_reloc(r_type))
7041 Address off = target->glink_section()->find_global_entry(gsym);
7042 if (off != invalid_address)
7044 value = target->glink_section()->global_entry_address() + off;
7045 has_stub_value = true;
7050 Stub_table<size, big_endian>* stub_table
7051 = object->stub_table(relinfo->data_shndx);
7052 if (stub_table == NULL)
7054 // This is a ref from a data section to an ifunc symbol.
7055 if (target->stub_tables().size() != 0)
7056 stub_table = target->stub_tables()[0];
7058 if (stub_table != NULL)
7062 off = stub_table->find_plt_call_entry(object, gsym, r_type,
7063 rela.get_r_addend());
7065 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
7066 rela.get_r_addend());
7067 if (off != invalid_address)
7069 value = stub_table->stub_address() + off;
7070 has_stub_value = true;
7074 // We don't care too much about bogus debug references to
7075 // non-local functions, but otherwise there had better be a plt
7076 // call stub or global entry stub as appropriate.
7077 gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC));
7080 if (r_type == elfcpp::R_POWERPC_GOT16
7081 || r_type == elfcpp::R_POWERPC_GOT16_LO
7082 || r_type == elfcpp::R_POWERPC_GOT16_HI
7083 || r_type == elfcpp::R_POWERPC_GOT16_HA
7084 || r_type == elfcpp::R_PPC64_GOT16_DS
7085 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
7089 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
7090 value = gsym->got_offset(GOT_TYPE_STANDARD);
7094 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7095 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
7096 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
7098 value -= target->got_section()->got_base_offset(object);
7100 else if (r_type == elfcpp::R_PPC64_TOC)
7102 value = (target->got_section()->output_section()->address()
7103 + object->toc_base_offset());
7105 else if (gsym != NULL
7106 && (r_type == elfcpp::R_POWERPC_REL24
7107 || r_type == elfcpp::R_PPC_PLTREL24)
7112 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
7113 Valtype* wv = reinterpret_cast<Valtype*>(view);
7114 bool can_plt_call = false;
7115 if (rela.get_r_offset() + 8 <= view_size)
7117 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
7118 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
7121 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
7123 elfcpp::Swap<32, big_endian>::
7124 writeval(wv + 1, ld_2_1 + target->stk_toc());
7125 can_plt_call = true;
7130 // If we don't have a branch and link followed by a nop,
7131 // we can't go via the plt because there is no place to
7132 // put a toc restoring instruction.
7133 // Unless we know we won't be returning.
7134 if (strcmp(gsym->name(), "__libc_start_main") == 0)
7135 can_plt_call = true;
7139 // g++ as of 20130507 emits self-calls without a
7140 // following nop. This is arguably wrong since we have
7141 // conflicting information. On the one hand a global
7142 // symbol and on the other a local call sequence, but
7143 // don't error for this special case.
7144 // It isn't possible to cheaply verify we have exactly
7145 // such a call. Allow all calls to the same section.
7147 Address code = value;
7148 if (gsym->source() == Symbol::FROM_OBJECT
7149 && gsym->object() == object)
7151 unsigned int dest_shndx = 0;
7152 if (target->abiversion() < 2)
7154 Address addend = rela.get_r_addend();
7155 code = psymval->value(object, addend);
7156 target->symval_for_branch(relinfo->symtab, gsym, object,
7157 &code, &dest_shndx);
7160 if (dest_shndx == 0)
7161 dest_shndx = gsym->shndx(&is_ordinary);
7162 ok = dest_shndx == relinfo->data_shndx;
7166 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7167 _("call lacks nop, can't restore toc; "
7168 "recompile with -fPIC"));
7174 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7175 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
7176 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
7177 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
7179 // First instruction of a global dynamic sequence, arg setup insn.
7180 const bool final = gsym == NULL || gsym->final_value_is_known();
7181 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7182 enum Got_type got_type = GOT_TYPE_STANDARD;
7183 if (tls_type == tls::TLSOPT_NONE)
7184 got_type = GOT_TYPE_TLSGD;
7185 else if (tls_type == tls::TLSOPT_TO_IE)
7186 got_type = GOT_TYPE_TPREL;
7187 if (got_type != GOT_TYPE_STANDARD)
7191 gold_assert(gsym->has_got_offset(got_type));
7192 value = gsym->got_offset(got_type);
7196 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7197 gold_assert(object->local_has_got_offset(r_sym, got_type));
7198 value = object->local_got_offset(r_sym, got_type);
7200 value -= target->got_section()->got_base_offset(object);
7202 if (tls_type == tls::TLSOPT_TO_IE)
7204 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7205 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7207 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7208 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7209 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
7211 insn |= 32 << 26; // lwz
7213 insn |= 58 << 26; // ld
7214 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7216 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
7217 - elfcpp::R_POWERPC_GOT_TLSGD16);
7219 else if (tls_type == tls::TLSOPT_TO_LE)
7221 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7222 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7224 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7225 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7226 insn &= (1 << 26) - (1 << 21); // extract rt
7231 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7232 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7233 value = psymval->value(object, rela.get_r_addend());
7237 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7239 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7240 r_type = elfcpp::R_POWERPC_NONE;
7244 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7245 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
7246 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
7247 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
7249 // First instruction of a local dynamic sequence, arg setup insn.
7250 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7251 if (tls_type == tls::TLSOPT_NONE)
7253 value = target->tlsld_got_offset();
7254 value -= target->got_section()->got_base_offset(object);
7258 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7259 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7260 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
7262 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7263 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7264 insn &= (1 << 26) - (1 << 21); // extract rt
7269 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7270 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7275 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7277 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7278 r_type = elfcpp::R_POWERPC_NONE;
7282 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
7283 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
7284 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
7285 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
7287 // Accesses relative to a local dynamic sequence address,
7288 // no optimisation here.
7291 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
7292 value = gsym->got_offset(GOT_TYPE_DTPREL);
7296 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7297 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
7298 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
7300 value -= target->got_section()->got_base_offset(object);
7302 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7303 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
7304 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
7305 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
7307 // First instruction of initial exec sequence.
7308 const bool final = gsym == NULL || gsym->final_value_is_known();
7309 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7310 if (tls_type == tls::TLSOPT_NONE)
7314 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
7315 value = gsym->got_offset(GOT_TYPE_TPREL);
7319 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7320 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
7321 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
7323 value -= target->got_section()->got_base_offset(object);
7327 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7328 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7329 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
7331 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7332 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7333 insn &= (1 << 26) - (1 << 21); // extract rt from ld
7338 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7339 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7340 value = psymval->value(object, rela.get_r_addend());
7344 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7346 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7347 r_type = elfcpp::R_POWERPC_NONE;
7351 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
7352 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
7354 // Second instruction of a global dynamic sequence,
7355 // the __tls_get_addr call
7356 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7357 const bool final = gsym == NULL || gsym->final_value_is_known();
7358 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7359 if (tls_type != tls::TLSOPT_NONE)
7361 if (tls_type == tls::TLSOPT_TO_IE)
7363 Insn* iview = reinterpret_cast<Insn*>(view);
7364 Insn insn = add_3_3_13;
7367 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7368 r_type = elfcpp::R_POWERPC_NONE;
7372 Insn* iview = reinterpret_cast<Insn*>(view);
7373 Insn insn = addi_3_3;
7374 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7375 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7376 view += 2 * big_endian;
7377 value = psymval->value(object, rela.get_r_addend());
7379 this->skip_next_tls_get_addr_call();
7382 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
7383 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
7385 // Second instruction of a local dynamic sequence,
7386 // the __tls_get_addr call
7387 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7388 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7389 if (tls_type == tls::TLSOPT_TO_LE)
7391 Insn* iview = reinterpret_cast<Insn*>(view);
7392 Insn insn = addi_3_3;
7393 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7394 this->skip_next_tls_get_addr_call();
7395 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7396 view += 2 * big_endian;
7400 else if (r_type == elfcpp::R_POWERPC_TLS)
7402 // Second instruction of an initial exec sequence
7403 const bool final = gsym == NULL || gsym->final_value_is_known();
7404 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7405 if (tls_type == tls::TLSOPT_TO_LE)
7407 Insn* iview = reinterpret_cast<Insn*>(view);
7408 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7409 unsigned int reg = size == 32 ? 2 : 13;
7410 insn = at_tls_transform(insn, reg);
7411 gold_assert(insn != 0);
7412 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7413 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7414 view += 2 * big_endian;
7415 value = psymval->value(object, rela.get_r_addend());
7418 else if (!has_stub_value)
7421 if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24))
7422 addend = rela.get_r_addend();
7423 value = psymval->value(object, addend);
7424 if (size == 64 && is_branch_reloc(r_type))
7426 if (target->abiversion() >= 2)
7429 value += object->ppc64_local_entry_offset(gsym);
7431 value += object->ppc64_local_entry_offset(r_sym);
7435 unsigned int dest_shndx;
7436 target->symval_for_branch(relinfo->symtab, gsym, object,
7437 &value, &dest_shndx);
7440 Address max_branch_offset = max_branch_delta(r_type);
7441 if (max_branch_offset != 0
7442 && value - address + max_branch_offset >= 2 * max_branch_offset)
7444 Stub_table<size, big_endian>* stub_table
7445 = object->stub_table(relinfo->data_shndx);
7446 if (stub_table != NULL)
7448 Address off = stub_table->find_long_branch_entry(object, value);
7449 if (off != invalid_address)
7451 value = (stub_table->stub_address() + stub_table->plt_size()
7453 has_stub_value = true;
7461 case elfcpp::R_PPC64_REL64:
7462 case elfcpp::R_POWERPC_REL32:
7463 case elfcpp::R_POWERPC_REL24:
7464 case elfcpp::R_PPC_PLTREL24:
7465 case elfcpp::R_PPC_LOCAL24PC:
7466 case elfcpp::R_POWERPC_REL16:
7467 case elfcpp::R_POWERPC_REL16_LO:
7468 case elfcpp::R_POWERPC_REL16_HI:
7469 case elfcpp::R_POWERPC_REL16_HA:
7470 case elfcpp::R_POWERPC_REL16DX_HA:
7471 case elfcpp::R_POWERPC_REL14:
7472 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7473 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7477 case elfcpp::R_PPC64_TOC16:
7478 case elfcpp::R_PPC64_TOC16_LO:
7479 case elfcpp::R_PPC64_TOC16_HI:
7480 case elfcpp::R_PPC64_TOC16_HA:
7481 case elfcpp::R_PPC64_TOC16_DS:
7482 case elfcpp::R_PPC64_TOC16_LO_DS:
7483 // Subtract the TOC base address.
7484 value -= (target->got_section()->output_section()->address()
7485 + object->toc_base_offset());
7488 case elfcpp::R_POWERPC_SECTOFF:
7489 case elfcpp::R_POWERPC_SECTOFF_LO:
7490 case elfcpp::R_POWERPC_SECTOFF_HI:
7491 case elfcpp::R_POWERPC_SECTOFF_HA:
7492 case elfcpp::R_PPC64_SECTOFF_DS:
7493 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7495 value -= os->address();
7498 case elfcpp::R_PPC64_TPREL16_DS:
7499 case elfcpp::R_PPC64_TPREL16_LO_DS:
7500 case elfcpp::R_PPC64_TPREL16_HIGH:
7501 case elfcpp::R_PPC64_TPREL16_HIGHA:
7503 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7505 case elfcpp::R_POWERPC_TPREL16:
7506 case elfcpp::R_POWERPC_TPREL16_LO:
7507 case elfcpp::R_POWERPC_TPREL16_HI:
7508 case elfcpp::R_POWERPC_TPREL16_HA:
7509 case elfcpp::R_POWERPC_TPREL:
7510 case elfcpp::R_PPC64_TPREL16_HIGHER:
7511 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7512 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7513 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7514 // tls symbol values are relative to tls_segment()->vaddr()
7518 case elfcpp::R_PPC64_DTPREL16_DS:
7519 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7520 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7521 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7522 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7523 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7525 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7526 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7528 case elfcpp::R_POWERPC_DTPREL16:
7529 case elfcpp::R_POWERPC_DTPREL16_LO:
7530 case elfcpp::R_POWERPC_DTPREL16_HI:
7531 case elfcpp::R_POWERPC_DTPREL16_HA:
7532 case elfcpp::R_POWERPC_DTPREL:
7533 case elfcpp::R_PPC64_DTPREL16_HIGH:
7534 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7535 // tls symbol values are relative to tls_segment()->vaddr()
7536 value -= dtp_offset;
7539 case elfcpp::R_PPC64_ADDR64_LOCAL:
7541 value += object->ppc64_local_entry_offset(gsym);
7543 value += object->ppc64_local_entry_offset(r_sym);
7550 Insn branch_bit = 0;
7553 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7554 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7555 branch_bit = 1 << 21;
7556 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7557 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7559 Insn* iview = reinterpret_cast<Insn*>(view);
7560 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7563 if (this->is_isa_v2)
7565 // Set 'a' bit. This is 0b00010 in BO field for branch
7566 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7567 // for branch on CTR insns (BO == 1a00t or 1a01t).
7568 if ((insn & (0x14 << 21)) == (0x04 << 21))
7570 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7577 // Invert 'y' bit if not the default.
7578 if (static_cast<Signed_address>(value) < 0)
7581 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7591 // Multi-instruction sequences that access the TOC can be
7592 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7593 // to nop; addi rb,r2,x;
7599 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7600 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7601 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7602 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7603 case elfcpp::R_POWERPC_GOT16_HA:
7604 case elfcpp::R_PPC64_TOC16_HA:
7605 if (parameters->options().toc_optimize())
7607 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7608 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7609 if ((insn & ((0x3f << 26) | 0x1f << 16))
7610 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7611 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7612 _("toc optimization is not supported "
7613 "for %#08x instruction"), insn);
7614 else if (value + 0x8000 < 0x10000)
7616 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
7622 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7623 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7624 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7625 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7626 case elfcpp::R_POWERPC_GOT16_LO:
7627 case elfcpp::R_PPC64_GOT16_LO_DS:
7628 case elfcpp::R_PPC64_TOC16_LO:
7629 case elfcpp::R_PPC64_TOC16_LO_DS:
7630 if (parameters->options().toc_optimize())
7632 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7633 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7634 if (!ok_lo_toc_insn(insn))
7635 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7636 _("toc optimization is not supported "
7637 "for %#08x instruction"), insn);
7638 else if (value + 0x8000 < 0x10000)
7640 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
7642 // Transform addic to addi when we change reg.
7643 insn &= ~((0x3f << 26) | (0x1f << 16));
7644 insn |= (14u << 26) | (2 << 16);
7648 insn &= ~(0x1f << 16);
7651 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7658 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
7659 elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr);
7662 case elfcpp::R_POWERPC_ADDR32:
7663 case elfcpp::R_POWERPC_UADDR32:
7665 overflow = Reloc::CHECK_BITFIELD;
7668 case elfcpp::R_POWERPC_REL32:
7669 case elfcpp::R_POWERPC_REL16DX_HA:
7671 overflow = Reloc::CHECK_SIGNED;
7674 case elfcpp::R_POWERPC_UADDR16:
7675 overflow = Reloc::CHECK_BITFIELD;
7678 case elfcpp::R_POWERPC_ADDR16:
7679 // We really should have three separate relocations,
7680 // one for 16-bit data, one for insns with 16-bit signed fields,
7681 // and one for insns with 16-bit unsigned fields.
7682 overflow = Reloc::CHECK_BITFIELD;
7683 if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
7684 overflow = Reloc::CHECK_LOW_INSN;
7687 case elfcpp::R_POWERPC_ADDR16_HI:
7688 case elfcpp::R_POWERPC_ADDR16_HA:
7689 case elfcpp::R_POWERPC_GOT16_HI:
7690 case elfcpp::R_POWERPC_GOT16_HA:
7691 case elfcpp::R_POWERPC_PLT16_HI:
7692 case elfcpp::R_POWERPC_PLT16_HA:
7693 case elfcpp::R_POWERPC_SECTOFF_HI:
7694 case elfcpp::R_POWERPC_SECTOFF_HA:
7695 case elfcpp::R_PPC64_TOC16_HI:
7696 case elfcpp::R_PPC64_TOC16_HA:
7697 case elfcpp::R_PPC64_PLTGOT16_HI:
7698 case elfcpp::R_PPC64_PLTGOT16_HA:
7699 case elfcpp::R_POWERPC_TPREL16_HI:
7700 case elfcpp::R_POWERPC_TPREL16_HA:
7701 case elfcpp::R_POWERPC_DTPREL16_HI:
7702 case elfcpp::R_POWERPC_DTPREL16_HA:
7703 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7704 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7705 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7706 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7707 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7708 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7709 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7710 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7711 case elfcpp::R_POWERPC_REL16_HI:
7712 case elfcpp::R_POWERPC_REL16_HA:
7714 overflow = Reloc::CHECK_HIGH_INSN;
7717 case elfcpp::R_POWERPC_REL16:
7718 case elfcpp::R_PPC64_TOC16:
7719 case elfcpp::R_POWERPC_GOT16:
7720 case elfcpp::R_POWERPC_SECTOFF:
7721 case elfcpp::R_POWERPC_TPREL16:
7722 case elfcpp::R_POWERPC_DTPREL16:
7723 case elfcpp::R_POWERPC_GOT_TLSGD16:
7724 case elfcpp::R_POWERPC_GOT_TLSLD16:
7725 case elfcpp::R_POWERPC_GOT_TPREL16:
7726 case elfcpp::R_POWERPC_GOT_DTPREL16:
7727 overflow = Reloc::CHECK_LOW_INSN;
7730 case elfcpp::R_POWERPC_ADDR24:
7731 case elfcpp::R_POWERPC_ADDR14:
7732 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7733 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7734 case elfcpp::R_PPC64_ADDR16_DS:
7735 case elfcpp::R_POWERPC_REL24:
7736 case elfcpp::R_PPC_PLTREL24:
7737 case elfcpp::R_PPC_LOCAL24PC:
7738 case elfcpp::R_PPC64_TPREL16_DS:
7739 case elfcpp::R_PPC64_DTPREL16_DS:
7740 case elfcpp::R_PPC64_TOC16_DS:
7741 case elfcpp::R_PPC64_GOT16_DS:
7742 case elfcpp::R_PPC64_SECTOFF_DS:
7743 case elfcpp::R_POWERPC_REL14:
7744 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7745 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7746 overflow = Reloc::CHECK_SIGNED;
7750 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7753 if (overflow == Reloc::CHECK_LOW_INSN
7754 || overflow == Reloc::CHECK_HIGH_INSN)
7756 insn = elfcpp::Swap<32, big_endian>::readval(iview);
7758 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
7759 overflow = Reloc::CHECK_BITFIELD;
7760 else if (overflow == Reloc::CHECK_LOW_INSN
7761 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
7762 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
7763 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
7764 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
7765 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
7766 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
7767 overflow = Reloc::CHECK_UNSIGNED;
7769 overflow = Reloc::CHECK_SIGNED;
7772 bool maybe_dq_reloc = false;
7773 typename Powerpc_relocate_functions<size, big_endian>::Status status
7774 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
7777 case elfcpp::R_POWERPC_NONE:
7778 case elfcpp::R_POWERPC_TLS:
7779 case elfcpp::R_POWERPC_GNU_VTINHERIT:
7780 case elfcpp::R_POWERPC_GNU_VTENTRY:
7783 case elfcpp::R_PPC64_ADDR64:
7784 case elfcpp::R_PPC64_REL64:
7785 case elfcpp::R_PPC64_TOC:
7786 case elfcpp::R_PPC64_ADDR64_LOCAL:
7787 Reloc::addr64(view, value);
7790 case elfcpp::R_POWERPC_TPREL:
7791 case elfcpp::R_POWERPC_DTPREL:
7793 Reloc::addr64(view, value);
7795 status = Reloc::addr32(view, value, overflow);
7798 case elfcpp::R_PPC64_UADDR64:
7799 Reloc::addr64_u(view, value);
7802 case elfcpp::R_POWERPC_ADDR32:
7803 status = Reloc::addr32(view, value, overflow);
7806 case elfcpp::R_POWERPC_REL32:
7807 case elfcpp::R_POWERPC_UADDR32:
7808 status = Reloc::addr32_u(view, value, overflow);
7811 case elfcpp::R_POWERPC_ADDR24:
7812 case elfcpp::R_POWERPC_REL24:
7813 case elfcpp::R_PPC_PLTREL24:
7814 case elfcpp::R_PPC_LOCAL24PC:
7815 status = Reloc::addr24(view, value, overflow);
7818 case elfcpp::R_POWERPC_GOT_DTPREL16:
7819 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7820 case elfcpp::R_POWERPC_GOT_TPREL16:
7821 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7824 // On ppc64 these are all ds form
7825 maybe_dq_reloc = true;
7828 case elfcpp::R_POWERPC_ADDR16:
7829 case elfcpp::R_POWERPC_REL16:
7830 case elfcpp::R_PPC64_TOC16:
7831 case elfcpp::R_POWERPC_GOT16:
7832 case elfcpp::R_POWERPC_SECTOFF:
7833 case elfcpp::R_POWERPC_TPREL16:
7834 case elfcpp::R_POWERPC_DTPREL16:
7835 case elfcpp::R_POWERPC_GOT_TLSGD16:
7836 case elfcpp::R_POWERPC_GOT_TLSLD16:
7837 case elfcpp::R_POWERPC_ADDR16_LO:
7838 case elfcpp::R_POWERPC_REL16_LO:
7839 case elfcpp::R_PPC64_TOC16_LO:
7840 case elfcpp::R_POWERPC_GOT16_LO:
7841 case elfcpp::R_POWERPC_SECTOFF_LO:
7842 case elfcpp::R_POWERPC_TPREL16_LO:
7843 case elfcpp::R_POWERPC_DTPREL16_LO:
7844 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7845 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7847 status = Reloc::addr16(view, value, overflow);
7849 maybe_dq_reloc = true;
7852 case elfcpp::R_POWERPC_UADDR16:
7853 status = Reloc::addr16_u(view, value, overflow);
7856 case elfcpp::R_PPC64_ADDR16_HIGH:
7857 case elfcpp::R_PPC64_TPREL16_HIGH:
7858 case elfcpp::R_PPC64_DTPREL16_HIGH:
7860 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7862 case elfcpp::R_POWERPC_ADDR16_HI:
7863 case elfcpp::R_POWERPC_REL16_HI:
7864 case elfcpp::R_PPC64_TOC16_HI:
7865 case elfcpp::R_POWERPC_GOT16_HI:
7866 case elfcpp::R_POWERPC_SECTOFF_HI:
7867 case elfcpp::R_POWERPC_TPREL16_HI:
7868 case elfcpp::R_POWERPC_DTPREL16_HI:
7869 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7870 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7871 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7872 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7873 Reloc::addr16_hi(view, value);
7876 case elfcpp::R_PPC64_ADDR16_HIGHA:
7877 case elfcpp::R_PPC64_TPREL16_HIGHA:
7878 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7880 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7882 case elfcpp::R_POWERPC_ADDR16_HA:
7883 case elfcpp::R_POWERPC_REL16_HA:
7884 case elfcpp::R_PPC64_TOC16_HA:
7885 case elfcpp::R_POWERPC_GOT16_HA:
7886 case elfcpp::R_POWERPC_SECTOFF_HA:
7887 case elfcpp::R_POWERPC_TPREL16_HA:
7888 case elfcpp::R_POWERPC_DTPREL16_HA:
7889 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7890 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7891 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7892 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7893 Reloc::addr16_ha(view, value);
7896 case elfcpp::R_POWERPC_REL16DX_HA:
7897 status = Reloc::addr16dx_ha(view, value, overflow);
7900 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7902 // R_PPC_EMB_NADDR16_LO
7904 case elfcpp::R_PPC64_ADDR16_HIGHER:
7905 case elfcpp::R_PPC64_TPREL16_HIGHER:
7906 Reloc::addr16_hi2(view, value);
7909 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7911 // R_PPC_EMB_NADDR16_HI
7913 case elfcpp::R_PPC64_ADDR16_HIGHERA:
7914 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7915 Reloc::addr16_ha2(view, value);
7918 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7920 // R_PPC_EMB_NADDR16_HA
7922 case elfcpp::R_PPC64_ADDR16_HIGHEST:
7923 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7924 Reloc::addr16_hi3(view, value);
7927 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7931 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
7932 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7933 Reloc::addr16_ha3(view, value);
7936 case elfcpp::R_PPC64_DTPREL16_DS:
7937 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7939 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7941 case elfcpp::R_PPC64_TPREL16_DS:
7942 case elfcpp::R_PPC64_TPREL16_LO_DS:
7944 // R_PPC_TLSGD, R_PPC_TLSLD
7946 case elfcpp::R_PPC64_ADDR16_DS:
7947 case elfcpp::R_PPC64_ADDR16_LO_DS:
7948 case elfcpp::R_PPC64_TOC16_DS:
7949 case elfcpp::R_PPC64_TOC16_LO_DS:
7950 case elfcpp::R_PPC64_GOT16_DS:
7951 case elfcpp::R_PPC64_GOT16_LO_DS:
7952 case elfcpp::R_PPC64_SECTOFF_DS:
7953 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7954 maybe_dq_reloc = true;
7957 case elfcpp::R_POWERPC_ADDR14:
7958 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7959 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7960 case elfcpp::R_POWERPC_REL14:
7961 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7962 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7963 status = Reloc::addr14(view, value, overflow);
7966 case elfcpp::R_POWERPC_COPY:
7967 case elfcpp::R_POWERPC_GLOB_DAT:
7968 case elfcpp::R_POWERPC_JMP_SLOT:
7969 case elfcpp::R_POWERPC_RELATIVE:
7970 case elfcpp::R_POWERPC_DTPMOD:
7971 case elfcpp::R_PPC64_JMP_IREL:
7972 case elfcpp::R_POWERPC_IRELATIVE:
7973 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7974 _("unexpected reloc %u in object file"),
7978 case elfcpp::R_PPC_EMB_SDA21:
7983 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7987 case elfcpp::R_PPC_EMB_SDA2I16:
7988 case elfcpp::R_PPC_EMB_SDA2REL:
7991 // R_PPC64_TLSGD, R_PPC64_TLSLD
7994 case elfcpp::R_POWERPC_PLT32:
7995 case elfcpp::R_POWERPC_PLTREL32:
7996 case elfcpp::R_POWERPC_PLT16_LO:
7997 case elfcpp::R_POWERPC_PLT16_HI:
7998 case elfcpp::R_POWERPC_PLT16_HA:
7999 case elfcpp::R_PPC_SDAREL16:
8000 case elfcpp::R_POWERPC_ADDR30:
8001 case elfcpp::R_PPC64_PLT64:
8002 case elfcpp::R_PPC64_PLTREL64:
8003 case elfcpp::R_PPC64_PLTGOT16:
8004 case elfcpp::R_PPC64_PLTGOT16_LO:
8005 case elfcpp::R_PPC64_PLTGOT16_HI:
8006 case elfcpp::R_PPC64_PLTGOT16_HA:
8007 case elfcpp::R_PPC64_PLT16_LO_DS:
8008 case elfcpp::R_PPC64_PLTGOT16_DS:
8009 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
8010 case elfcpp::R_PPC_EMB_RELSDA:
8011 case elfcpp::R_PPC_TOC16:
8014 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8015 _("unsupported reloc %u"),
8023 insn = elfcpp::Swap<32, big_endian>::readval(iview);
8025 if ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8026 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8027 && (insn & 3) == 1))
8028 status = Reloc::addr16_dq(view, value, overflow);
8030 || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8031 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8032 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8033 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */)
8034 status = Reloc::addr16_ds(view, value, overflow);
8036 status = Reloc::addr16(view, value, overflow);
8039 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
8042 && gsym->is_undefined()
8043 && is_branch_reloc(r_type))))
8045 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8046 _("relocation overflow"));
8048 gold_info(_("try relinking with a smaller --stub-group-size"));
8054 // Relocate section data.
8056 template<int size, bool big_endian>
8058 Target_powerpc<size, big_endian>::relocate_section(
8059 const Relocate_info<size, big_endian>* relinfo,
8060 unsigned int sh_type,
8061 const unsigned char* prelocs,
8063 Output_section* output_section,
8064 bool needs_special_offset_handling,
8065 unsigned char* view,
8067 section_size_type view_size,
8068 const Reloc_symbol_changes* reloc_symbol_changes)
8070 typedef Target_powerpc<size, big_endian> Powerpc;
8071 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
8072 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
8073 Powerpc_comdat_behavior;
8075 gold_assert(sh_type == elfcpp::SHT_RELA);
8077 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
8078 Powerpc_relocate, Powerpc_comdat_behavior>(
8084 needs_special_offset_handling,
8088 reloc_symbol_changes);
8091 class Powerpc_scan_relocatable_reloc
8094 // Return the strategy to use for a local symbol which is not a
8095 // section symbol, given the relocation type.
8096 inline Relocatable_relocs::Reloc_strategy
8097 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
8099 if (r_type == 0 && r_sym == 0)
8100 return Relocatable_relocs::RELOC_DISCARD;
8101 return Relocatable_relocs::RELOC_COPY;
8104 // Return the strategy to use for a local symbol which is a section
8105 // symbol, given the relocation type.
8106 inline Relocatable_relocs::Reloc_strategy
8107 local_section_strategy(unsigned int, Relobj*)
8109 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
8112 // Return the strategy to use for a global symbol, given the
8113 // relocation type, the object, and the symbol index.
8114 inline Relocatable_relocs::Reloc_strategy
8115 global_strategy(unsigned int r_type, Relobj*, unsigned int)
8117 if (r_type == elfcpp::R_PPC_PLTREL24)
8118 return Relocatable_relocs::RELOC_SPECIAL;
8119 return Relocatable_relocs::RELOC_COPY;
8123 // Scan the relocs during a relocatable link.
8125 template<int size, bool big_endian>
8127 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
8128 Symbol_table* symtab,
8130 Sized_relobj_file<size, big_endian>* object,
8131 unsigned int data_shndx,
8132 unsigned int sh_type,
8133 const unsigned char* prelocs,
8135 Output_section* output_section,
8136 bool needs_special_offset_handling,
8137 size_t local_symbol_count,
8138 const unsigned char* plocal_symbols,
8139 Relocatable_relocs* rr)
8141 gold_assert(sh_type == elfcpp::SHT_RELA);
8143 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
8144 Powerpc_scan_relocatable_reloc>(
8152 needs_special_offset_handling,
8158 // Emit relocations for a section.
8159 // This is a modified version of the function by the same name in
8160 // target-reloc.h. Using relocate_special_relocatable for
8161 // R_PPC_PLTREL24 would require duplication of the entire body of the
8162 // loop, so we may as well duplicate the whole thing.
8164 template<int size, bool big_endian>
8166 Target_powerpc<size, big_endian>::relocate_relocs(
8167 const Relocate_info<size, big_endian>* relinfo,
8168 unsigned int sh_type,
8169 const unsigned char* prelocs,
8171 Output_section* output_section,
8172 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
8173 const Relocatable_relocs* rr,
8175 Address view_address,
8177 unsigned char* reloc_view,
8178 section_size_type reloc_view_size)
8180 gold_assert(sh_type == elfcpp::SHT_RELA);
8182 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
8184 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
8186 const int reloc_size
8187 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
8189 Powerpc_relobj<size, big_endian>* const object
8190 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
8191 const unsigned int local_count = object->local_symbol_count();
8192 unsigned int got2_shndx = object->got2_shndx();
8193 Address got2_addend = 0;
8194 if (got2_shndx != 0)
8196 got2_addend = object->get_output_section_offset(got2_shndx);
8197 gold_assert(got2_addend != invalid_address);
8200 unsigned char* pwrite = reloc_view;
8201 bool zap_next = false;
8202 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
8204 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
8205 if (strategy == Relocatable_relocs::RELOC_DISCARD)
8208 Reltype reloc(prelocs);
8209 Reltype_write reloc_write(pwrite);
8211 Address offset = reloc.get_r_offset();
8212 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
8213 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
8214 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
8215 const unsigned int orig_r_sym = r_sym;
8216 typename elfcpp::Elf_types<size>::Elf_Swxword addend
8217 = reloc.get_r_addend();
8218 const Symbol* gsym = NULL;
8222 // We could arrange to discard these and other relocs for
8223 // tls optimised sequences in the strategy methods, but for
8224 // now do as BFD ld does.
8225 r_type = elfcpp::R_POWERPC_NONE;
8229 // Get the new symbol index.
8230 Output_section* os = NULL;
8231 if (r_sym < local_count)
8235 case Relocatable_relocs::RELOC_COPY:
8236 case Relocatable_relocs::RELOC_SPECIAL:
8239 r_sym = object->symtab_index(r_sym);
8240 gold_assert(r_sym != -1U);
8244 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
8246 // We are adjusting a section symbol. We need to find
8247 // the symbol table index of the section symbol for
8248 // the output section corresponding to input section
8249 // in which this symbol is defined.
8250 gold_assert(r_sym < local_count);
8252 unsigned int shndx =
8253 object->local_symbol_input_shndx(r_sym, &is_ordinary);
8254 gold_assert(is_ordinary);
8255 os = object->output_section(shndx);
8256 gold_assert(os != NULL);
8257 gold_assert(os->needs_symtab_index());
8258 r_sym = os->symtab_index();
8268 gsym = object->global_symbol(r_sym);
8269 gold_assert(gsym != NULL);
8270 if (gsym->is_forwarder())
8271 gsym = relinfo->symtab->resolve_forwards(gsym);
8273 gold_assert(gsym->has_symtab_index());
8274 r_sym = gsym->symtab_index();
8277 // Get the new offset--the location in the output section where
8278 // this relocation should be applied.
8279 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8280 offset += offset_in_output_section;
8283 section_offset_type sot_offset =
8284 convert_types<section_offset_type, Address>(offset);
8285 section_offset_type new_sot_offset =
8286 output_section->output_offset(object, relinfo->data_shndx,
8288 gold_assert(new_sot_offset != -1);
8289 offset = new_sot_offset;
8292 // In an object file, r_offset is an offset within the section.
8293 // In an executable or dynamic object, generated by
8294 // --emit-relocs, r_offset is an absolute address.
8295 if (!parameters->options().relocatable())
8297 offset += view_address;
8298 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8299 offset -= offset_in_output_section;
8302 // Handle the reloc addend based on the strategy.
8303 if (strategy == Relocatable_relocs::RELOC_COPY)
8305 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
8307 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
8308 gold_assert(os != NULL);
8309 addend = psymval->value(object, addend) - os->address();
8311 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
8313 if (addend >= 32768)
8314 addend += got2_addend;
8319 if (!parameters->options().relocatable())
8321 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8322 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
8323 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
8324 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
8326 // First instruction of a global dynamic sequence,
8328 const bool final = gsym == NULL || gsym->final_value_is_known();
8329 switch (this->optimize_tls_gd(final))
8331 case tls::TLSOPT_TO_IE:
8332 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
8333 - elfcpp::R_POWERPC_GOT_TLSGD16);
8335 case tls::TLSOPT_TO_LE:
8336 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8337 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
8338 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8341 r_type = elfcpp::R_POWERPC_NONE;
8342 offset -= 2 * big_endian;
8349 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8350 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
8351 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
8352 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
8354 // First instruction of a local dynamic sequence,
8356 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8358 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8359 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
8361 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8362 const Output_section* os = relinfo->layout->tls_segment()
8364 gold_assert(os != NULL);
8365 gold_assert(os->needs_symtab_index());
8366 r_sym = os->symtab_index();
8367 addend = dtp_offset;
8371 r_type = elfcpp::R_POWERPC_NONE;
8372 offset -= 2 * big_endian;
8376 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8377 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
8378 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
8379 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
8381 // First instruction of initial exec sequence.
8382 const bool final = gsym == NULL || gsym->final_value_is_known();
8383 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8385 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8386 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
8387 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8390 r_type = elfcpp::R_POWERPC_NONE;
8391 offset -= 2 * big_endian;
8395 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
8396 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
8398 // Second instruction of a global dynamic sequence,
8399 // the __tls_get_addr call
8400 const bool final = gsym == NULL || gsym->final_value_is_known();
8401 switch (this->optimize_tls_gd(final))
8403 case tls::TLSOPT_TO_IE:
8404 r_type = elfcpp::R_POWERPC_NONE;
8407 case tls::TLSOPT_TO_LE:
8408 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8409 offset += 2 * big_endian;
8416 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
8417 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
8419 // Second instruction of a local dynamic sequence,
8420 // the __tls_get_addr call
8421 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8423 const Output_section* os = relinfo->layout->tls_segment()
8425 gold_assert(os != NULL);
8426 gold_assert(os->needs_symtab_index());
8427 r_sym = os->symtab_index();
8428 addend = dtp_offset;
8429 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8430 offset += 2 * big_endian;
8434 else if (r_type == elfcpp::R_POWERPC_TLS)
8436 // Second instruction of an initial exec sequence
8437 const bool final = gsym == NULL || gsym->final_value_is_known();
8438 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8440 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8441 offset += 2 * big_endian;
8446 reloc_write.put_r_offset(offset);
8447 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
8448 reloc_write.put_r_addend(addend);
8450 pwrite += reloc_size;
8453 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
8454 == reloc_view_size);
8457 // Return the value to use for a dynamic symbol which requires special
8458 // treatment. This is how we support equality comparisons of function
8459 // pointers across shared library boundaries, as described in the
8460 // processor specific ABI supplement.
8462 template<int size, bool big_endian>
8464 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
8468 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
8469 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8470 p != this->stub_tables_.end();
8473 Address off = (*p)->find_plt_call_entry(gsym);
8474 if (off != invalid_address)
8475 return (*p)->stub_address() + off;
8478 else if (this->abiversion() >= 2)
8480 Address off = this->glink_section()->find_global_entry(gsym);
8481 if (off != invalid_address)
8482 return this->glink_section()->global_entry_address() + off;
8487 // Return the PLT address to use for a local symbol.
8488 template<int size, bool big_endian>
8490 Target_powerpc<size, big_endian>::do_plt_address_for_local(
8491 const Relobj* object,
8492 unsigned int symndx) const
8496 const Sized_relobj<size, big_endian>* relobj
8497 = static_cast<const Sized_relobj<size, big_endian>*>(object);
8498 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8499 p != this->stub_tables_.end();
8502 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
8504 if (off != invalid_address)
8505 return (*p)->stub_address() + off;
8511 // Return the PLT address to use for a global symbol.
8512 template<int size, bool big_endian>
8514 Target_powerpc<size, big_endian>::do_plt_address_for_global(
8515 const Symbol* gsym) const
8519 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8520 p != this->stub_tables_.end();
8523 Address off = (*p)->find_plt_call_entry(gsym);
8524 if (off != invalid_address)
8525 return (*p)->stub_address() + off;
8528 else if (this->abiversion() >= 2)
8530 Address off = this->glink_section()->find_global_entry(gsym);
8531 if (off != invalid_address)
8532 return this->glink_section()->global_entry_address() + off;
8537 // Return the offset to use for the GOT_INDX'th got entry which is
8538 // for a local tls symbol specified by OBJECT, SYMNDX.
8539 template<int size, bool big_endian>
8541 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
8542 const Relobj* object,
8543 unsigned int symndx,
8544 unsigned int got_indx) const
8546 const Powerpc_relobj<size, big_endian>* ppc_object
8547 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
8548 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
8550 for (Got_type got_type = GOT_TYPE_TLSGD;
8551 got_type <= GOT_TYPE_TPREL;
8552 got_type = Got_type(got_type + 1))
8553 if (ppc_object->local_has_got_offset(symndx, got_type))
8555 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
8556 if (got_type == GOT_TYPE_TLSGD)
8558 if (off == got_indx * (size / 8))
8560 if (got_type == GOT_TYPE_TPREL)
8570 // Return the offset to use for the GOT_INDX'th got entry which is
8571 // for global tls symbol GSYM.
8572 template<int size, bool big_endian>
8574 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
8576 unsigned int got_indx) const
8578 if (gsym->type() == elfcpp::STT_TLS)
8580 for (Got_type got_type = GOT_TYPE_TLSGD;
8581 got_type <= GOT_TYPE_TPREL;
8582 got_type = Got_type(got_type + 1))
8583 if (gsym->has_got_offset(got_type))
8585 unsigned int off = gsym->got_offset(got_type);
8586 if (got_type == GOT_TYPE_TLSGD)
8588 if (off == got_indx * (size / 8))
8590 if (got_type == GOT_TYPE_TPREL)
8600 // The selector for powerpc object files.
8602 template<int size, bool big_endian>
8603 class Target_selector_powerpc : public Target_selector
8606 Target_selector_powerpc()
8607 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
8610 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
8611 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
8613 ? (big_endian ? "elf64ppc" : "elf64lppc")
8614 : (big_endian ? "elf32ppc" : "elf32lppc")))
8618 do_instantiate_target()
8619 { return new Target_powerpc<size, big_endian>(); }
8622 Target_selector_powerpc<32, true> target_selector_ppc32;
8623 Target_selector_powerpc<32, false> target_selector_ppc32le;
8624 Target_selector_powerpc<64, true> target_selector_ppc64;
8625 Target_selector_powerpc<64, false> target_selector_ppc64le;
8627 // Instantiate these constants for -O0
8628 template<int size, bool big_endian>
8629 const int Output_data_glink<size, big_endian>::pltresolve_size;
8630 template<int size, bool big_endian>
8631 const typename Output_data_glink<size, big_endian>::Address
8632 Output_data_glink<size, big_endian>::invalid_address;
8633 template<int size, bool big_endian>
8634 const typename Stub_table<size, big_endian>::Address
8635 Stub_table<size, big_endian>::invalid_address;
8636 template<int size, bool big_endian>
8637 const typename Target_powerpc<size, big_endian>::Address
8638 Target_powerpc<size, big_endian>::invalid_address;
8640 } // End anonymous namespace.