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 this->set_addralign(256);
2200 // Override all the Output_data_got methods we use so as to first call
2203 add_global(Symbol* gsym, unsigned int got_type)
2205 this->reserve_ent();
2206 return Output_data_got<size, big_endian>::add_global(gsym, got_type);
2210 add_global_plt(Symbol* gsym, unsigned int got_type)
2212 this->reserve_ent();
2213 return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type);
2217 add_global_tls(Symbol* gsym, unsigned int got_type)
2218 { return this->add_global_plt(gsym, got_type); }
2221 add_global_with_rel(Symbol* gsym, unsigned int got_type,
2222 Output_data_reloc_generic* rel_dyn, unsigned int r_type)
2224 this->reserve_ent();
2225 Output_data_got<size, big_endian>::
2226 add_global_with_rel(gsym, got_type, rel_dyn, r_type);
2230 add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
2231 Output_data_reloc_generic* rel_dyn,
2232 unsigned int r_type_1, unsigned int r_type_2)
2234 this->reserve_ent(2);
2235 Output_data_got<size, big_endian>::
2236 add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2);
2240 add_local(Relobj* object, unsigned int sym_index, unsigned int got_type)
2242 this->reserve_ent();
2243 return Output_data_got<size, big_endian>::add_local(object, sym_index,
2248 add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type)
2250 this->reserve_ent();
2251 return Output_data_got<size, big_endian>::add_local_plt(object, sym_index,
2256 add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type)
2257 { return this->add_local_plt(object, sym_index, got_type); }
2260 add_local_tls_pair(Relobj* object, unsigned int sym_index,
2261 unsigned int got_type,
2262 Output_data_reloc_generic* rel_dyn,
2263 unsigned int r_type)
2265 this->reserve_ent(2);
2266 Output_data_got<size, big_endian>::
2267 add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type);
2271 add_constant(Valtype constant)
2273 this->reserve_ent();
2274 return Output_data_got<size, big_endian>::add_constant(constant);
2278 add_constant_pair(Valtype c1, Valtype c2)
2280 this->reserve_ent(2);
2281 return Output_data_got<size, big_endian>::add_constant_pair(c1, c2);
2284 // Offset of _GLOBAL_OFFSET_TABLE_.
2288 return this->got_offset(this->header_index_);
2291 // Offset of base used to access the GOT/TOC.
2292 // The got/toc pointer reg will be set to this value.
2294 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
2297 return this->g_o_t();
2299 return (this->output_section()->address()
2300 + object->toc_base_offset()
2304 // Ensure our GOT has a header.
2306 set_final_data_size()
2308 if (this->header_ent_cnt_ != 0)
2309 this->make_header();
2310 Output_data_got<size, big_endian>::set_final_data_size();
2313 // First word of GOT header needs some values that are not
2314 // handled by Output_data_got so poke them in here.
2315 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2317 do_write(Output_file* of)
2320 if (size == 32 && this->layout_->dynamic_data() != NULL)
2321 val = this->layout_->dynamic_section()->address();
2323 val = this->output_section()->address() + 0x8000;
2324 this->replace_constant(this->header_index_, val);
2325 Output_data_got<size, big_endian>::do_write(of);
2330 reserve_ent(unsigned int cnt = 1)
2332 if (this->header_ent_cnt_ == 0)
2334 if (this->num_entries() + cnt > this->header_index_)
2335 this->make_header();
2341 this->header_ent_cnt_ = 0;
2342 this->header_index_ = this->num_entries();
2345 Output_data_got<size, big_endian>::add_constant(0);
2346 Output_data_got<size, big_endian>::add_constant(0);
2347 Output_data_got<size, big_endian>::add_constant(0);
2349 // Define _GLOBAL_OFFSET_TABLE_ at the header
2350 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2353 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
2354 sym->set_value(this->g_o_t());
2357 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2358 Symbol_table::PREDEFINED,
2359 this, this->g_o_t(), 0,
2362 elfcpp::STV_HIDDEN, 0,
2366 Output_data_got<size, big_endian>::add_constant(0);
2369 // Stashed pointers.
2370 Symbol_table* symtab_;
2374 unsigned int header_ent_cnt_;
2375 // GOT header index.
2376 unsigned int header_index_;
2379 // Get the GOT section, creating it if necessary.
2381 template<int size, bool big_endian>
2382 Output_data_got_powerpc<size, big_endian>*
2383 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
2386 if (this->got_ == NULL)
2388 gold_assert(symtab != NULL && layout != NULL);
2391 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
2393 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
2394 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2395 this->got_, ORDER_DATA, false);
2401 // Get the dynamic reloc section, creating it if necessary.
2403 template<int size, bool big_endian>
2404 typename Target_powerpc<size, big_endian>::Reloc_section*
2405 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
2407 if (this->rela_dyn_ == NULL)
2409 gold_assert(layout != NULL);
2410 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
2411 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
2412 elfcpp::SHF_ALLOC, this->rela_dyn_,
2413 ORDER_DYNAMIC_RELOCS, false);
2415 return this->rela_dyn_;
2418 // Similarly, but for ifunc symbols get the one for ifunc.
2420 template<int size, bool big_endian>
2421 typename Target_powerpc<size, big_endian>::Reloc_section*
2422 Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
2427 return this->rela_dyn_section(layout);
2429 if (this->iplt_ == NULL)
2430 this->make_iplt_section(symtab, layout);
2431 return this->iplt_->rel_plt();
2437 // Determine the stub group size. The group size is the absolute
2438 // value of the parameter --stub-group-size. If --stub-group-size
2439 // is passed a negative value, we restrict stubs to be always before
2440 // the stubbed branches.
2441 Stub_control(int32_t size, bool no_size_errors)
2442 : state_(NO_GROUP), stub_group_size_(abs(size)),
2443 stub14_group_size_(abs(size) >> 10),
2444 stubs_always_before_branch_(size < 0),
2445 suppress_size_errors_(no_size_errors),
2446 group_end_addr_(0), owner_(NULL), output_section_(NULL)
2450 // Return true iff input section can be handled by current stub
2453 can_add_to_stub_group(Output_section* o,
2454 const Output_section::Input_section* i,
2457 const Output_section::Input_section*
2463 { return output_section_; }
2466 set_output_and_owner(Output_section* o,
2467 const Output_section::Input_section* i)
2469 this->output_section_ = o;
2477 FINDING_STUB_SECTION,
2482 uint32_t stub_group_size_;
2483 uint32_t stub14_group_size_;
2484 bool stubs_always_before_branch_;
2485 bool suppress_size_errors_;
2486 uint64_t group_end_addr_;
2487 const Output_section::Input_section* owner_;
2488 Output_section* output_section_;
2491 // Return true iff input section can be handled by current stub
2495 Stub_control::can_add_to_stub_group(Output_section* o,
2496 const Output_section::Input_section* i,
2500 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
2501 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
2503 uint64_t start_addr = o->address();
2506 // .init and .fini sections are pasted together to form a single
2507 // function. We can't be adding stubs in the middle of the function.
2508 this_size = o->data_size();
2511 start_addr += i->relobj()->output_section_offset(i->shndx());
2512 this_size = i->data_size();
2514 uint64_t end_addr = start_addr + this_size;
2515 bool toobig = this_size > group_size;
2517 if (toobig && !this->suppress_size_errors_)
2518 gold_warning(_("%s:%s exceeds group size"),
2519 i->relobj()->name().c_str(),
2520 i->relobj()->section_name(i->shndx()).c_str());
2522 if (this->state_ != HAS_STUB_SECTION
2523 && (!whole_sec || this->output_section_ != o)
2524 && (this->state_ == NO_GROUP
2525 || this->group_end_addr_ - end_addr < group_size))
2528 this->output_section_ = o;
2531 if (this->state_ == NO_GROUP)
2533 this->state_ = FINDING_STUB_SECTION;
2534 this->group_end_addr_ = end_addr;
2536 else if (this->group_end_addr_ - start_addr < group_size)
2538 // Adding this section would make the group larger than GROUP_SIZE.
2539 else if (this->state_ == FINDING_STUB_SECTION
2540 && !this->stubs_always_before_branch_
2543 // But wait, there's more! Input sections up to GROUP_SIZE
2544 // bytes before the stub table can be handled by it too.
2545 this->state_ = HAS_STUB_SECTION;
2546 this->group_end_addr_ = end_addr;
2550 this->state_ = NO_GROUP;
2556 // Look over all the input sections, deciding where to place stubs.
2558 template<int size, bool big_endian>
2560 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
2562 bool no_size_errors)
2564 Stub_control stub_control(this->stub_group_size_, no_size_errors);
2566 // Group input sections and insert stub table
2567 Stub_table_owner* table_owner = NULL;
2568 std::vector<Stub_table_owner*> tables;
2569 Layout::Section_list section_list;
2570 layout->get_executable_sections(§ion_list);
2571 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
2572 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
2573 o != section_list.rend();
2576 typedef Output_section::Input_section_list Input_section_list;
2577 for (Input_section_list::const_reverse_iterator i
2578 = (*o)->input_sections().rbegin();
2579 i != (*o)->input_sections().rend();
2582 if (i->is_input_section()
2583 || i->is_relaxed_input_section())
2585 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2586 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2587 bool has14 = ppcobj->has_14bit_branch(i->shndx());
2588 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
2590 table_owner->output_section = stub_control.output_section();
2591 table_owner->owner = stub_control.owner();
2592 stub_control.set_output_and_owner(*o, &*i);
2595 if (table_owner == NULL)
2597 table_owner = new Stub_table_owner;
2598 tables.push_back(table_owner);
2600 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2604 if (table_owner != NULL)
2606 const Output_section::Input_section* i = stub_control.owner();
2608 if (tables.size() >= 2 && tables[tables.size() - 2]->owner == i)
2610 // Corner case. A new stub group was made for the first
2611 // section (last one looked at here) for some reason, but
2612 // the first section is already being used as the owner for
2613 // a stub table for following sections. Force it into that
2617 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2618 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2619 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2623 table_owner->output_section = stub_control.output_section();
2624 table_owner->owner = i;
2627 for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin();
2631 Stub_table<size, big_endian>* stub_table;
2633 if ((*t)->owner->is_input_section())
2634 stub_table = new Stub_table<size, big_endian>(this,
2635 (*t)->output_section,
2637 else if ((*t)->owner->is_relaxed_input_section())
2638 stub_table = static_cast<Stub_table<size, big_endian>*>(
2639 (*t)->owner->relaxed_input_section());
2642 this->stub_tables_.push_back(stub_table);
2647 static unsigned long
2648 max_branch_delta (unsigned int r_type)
2650 if (r_type == elfcpp::R_POWERPC_REL14
2651 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
2652 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2654 if (r_type == elfcpp::R_POWERPC_REL24
2655 || r_type == elfcpp::R_PPC_PLTREL24
2656 || r_type == elfcpp::R_PPC_LOCAL24PC)
2661 // If this branch needs a plt call stub, or a long branch stub, make one.
2663 template<int size, bool big_endian>
2665 Target_powerpc<size, big_endian>::Branch_info::make_stub(
2666 Stub_table<size, big_endian>* stub_table,
2667 Stub_table<size, big_endian>* ifunc_stub_table,
2668 Symbol_table* symtab) const
2670 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2671 if (sym != NULL && sym->is_forwarder())
2672 sym = symtab->resolve_forwards(sym);
2673 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2674 Target_powerpc<size, big_endian>* target =
2675 static_cast<Target_powerpc<size, big_endian>*>(
2676 parameters->sized_target<size, big_endian>());
2678 ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
2679 : this->object_->local_has_plt_offset(this->r_sym_))
2683 && target->abiversion() >= 2
2684 && !parameters->options().output_is_position_independent()
2685 && !is_branch_reloc(this->r_type_))
2686 target->glink_section()->add_global_entry(gsym);
2689 if (stub_table == NULL)
2690 stub_table = this->object_->stub_table(this->shndx_);
2691 if (stub_table == NULL)
2693 // This is a ref from a data section to an ifunc symbol.
2694 stub_table = ifunc_stub_table;
2696 gold_assert(stub_table != NULL);
2697 Address from = this->object_->get_output_section_offset(this->shndx_);
2698 if (from != invalid_address)
2699 from += (this->object_->output_section(this->shndx_)->address()
2702 return stub_table->add_plt_call_entry(from,
2703 this->object_, gsym,
2704 this->r_type_, this->addend_);
2706 return stub_table->add_plt_call_entry(from,
2707 this->object_, this->r_sym_,
2708 this->r_type_, this->addend_);
2713 Address max_branch_offset = max_branch_delta(this->r_type_);
2714 if (max_branch_offset == 0)
2716 Address from = this->object_->get_output_section_offset(this->shndx_);
2717 gold_assert(from != invalid_address);
2718 from += (this->object_->output_section(this->shndx_)->address()
2723 switch (gsym->source())
2725 case Symbol::FROM_OBJECT:
2727 Object* symobj = gsym->object();
2728 if (symobj->is_dynamic()
2729 || symobj->pluginobj() != NULL)
2732 unsigned int shndx = gsym->shndx(&is_ordinary);
2733 if (shndx == elfcpp::SHN_UNDEF)
2738 case Symbol::IS_UNDEFINED:
2744 Symbol_table::Compute_final_value_status status;
2745 to = symtab->compute_final_value<size>(gsym, &status);
2746 if (status != Symbol_table::CFVS_OK)
2749 to += this->object_->ppc64_local_entry_offset(gsym);
2753 const Symbol_value<size>* psymval
2754 = this->object_->local_symbol(this->r_sym_);
2755 Symbol_value<size> symval;
2756 typedef Sized_relobj_file<size, big_endian> ObjType;
2757 typename ObjType::Compute_final_local_value_status status
2758 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2760 if (status != ObjType::CFLV_OK
2761 || !symval.has_output_value())
2763 to = symval.value(this->object_, 0);
2765 to += this->object_->ppc64_local_entry_offset(this->r_sym_);
2767 if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24))
2768 to += this->addend_;
2769 if (stub_table == NULL)
2770 stub_table = this->object_->stub_table(this->shndx_);
2771 if (size == 64 && target->abiversion() < 2)
2773 unsigned int dest_shndx;
2774 if (!target->symval_for_branch(symtab, gsym, this->object_,
2778 Address delta = to - from;
2779 if (delta + max_branch_offset >= 2 * max_branch_offset)
2781 if (stub_table == NULL)
2783 gold_warning(_("%s:%s: branch in non-executable section,"
2784 " no long branch stub for you"),
2785 this->object_->name().c_str(),
2786 this->object_->section_name(this->shndx_).c_str());
2789 bool save_res = (size == 64
2791 && gsym->source() == Symbol::IN_OUTPUT_DATA
2792 && gsym->output_data() == target->savres_section());
2793 return stub_table->add_long_branch_entry(this->object_,
2795 from, to, save_res);
2801 // Relaxation hook. This is where we do stub generation.
2803 template<int size, bool big_endian>
2805 Target_powerpc<size, big_endian>::do_relax(int pass,
2806 const Input_objects*,
2807 Symbol_table* symtab,
2811 unsigned int prev_brlt_size = 0;
2815 = this->abiversion() < 2 && parameters->options().plt_thread_safe();
2817 && this->abiversion() < 2
2819 && !parameters->options().user_set_plt_thread_safe())
2821 static const char* const thread_starter[] =
2825 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2827 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2828 "mq_notify", "create_timer",
2833 "GOMP_parallel_start",
2834 "GOMP_parallel_loop_static",
2835 "GOMP_parallel_loop_static_start",
2836 "GOMP_parallel_loop_dynamic",
2837 "GOMP_parallel_loop_dynamic_start",
2838 "GOMP_parallel_loop_guided",
2839 "GOMP_parallel_loop_guided_start",
2840 "GOMP_parallel_loop_runtime",
2841 "GOMP_parallel_loop_runtime_start",
2842 "GOMP_parallel_sections",
2843 "GOMP_parallel_sections_start",
2848 if (parameters->options().shared())
2852 for (unsigned int i = 0;
2853 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2856 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2857 thread_safe = (sym != NULL
2859 && sym->in_real_elf());
2865 this->plt_thread_safe_ = thread_safe;
2870 this->stub_group_size_ = parameters->options().stub_group_size();
2871 bool no_size_errors = true;
2872 if (this->stub_group_size_ == 1)
2873 this->stub_group_size_ = 0x1c00000;
2874 else if (this->stub_group_size_ == -1)
2875 this->stub_group_size_ = -0x1e00000;
2877 no_size_errors = false;
2878 this->group_sections(layout, task, no_size_errors);
2880 else if (this->relax_failed_ && this->relax_fail_count_ < 3)
2882 this->branch_lookup_table_.clear();
2883 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2884 p != this->stub_tables_.end();
2887 (*p)->clear_stubs(true);
2889 this->stub_tables_.clear();
2890 this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
2891 gold_info(_("%s: stub group size is too large; retrying with %d"),
2892 program_name, this->stub_group_size_);
2893 this->group_sections(layout, task, true);
2896 // We need address of stub tables valid for make_stub.
2897 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2898 p != this->stub_tables_.end();
2901 const Powerpc_relobj<size, big_endian>* object
2902 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2903 Address off = object->get_output_section_offset((*p)->shndx());
2904 gold_assert(off != invalid_address);
2905 Output_section* os = (*p)->output_section();
2906 (*p)->set_address_and_size(os, off);
2911 // Clear plt call stubs, long branch stubs and branch lookup table.
2912 prev_brlt_size = this->branch_lookup_table_.size();
2913 this->branch_lookup_table_.clear();
2914 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2915 p != this->stub_tables_.end();
2918 (*p)->clear_stubs(false);
2922 // Build all the stubs.
2923 this->relax_failed_ = false;
2924 Stub_table<size, big_endian>* ifunc_stub_table
2925 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2926 Stub_table<size, big_endian>* one_stub_table
2927 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2928 for (typename Branches::const_iterator b = this->branch_info_.begin();
2929 b != this->branch_info_.end();
2932 if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
2933 && !this->relax_failed_)
2935 this->relax_failed_ = true;
2936 this->relax_fail_count_++;
2937 if (this->relax_fail_count_ < 3)
2942 // Did anything change size?
2943 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2944 bool again = num_huge_branches != prev_brlt_size;
2945 if (size == 64 && num_huge_branches != 0)
2946 this->make_brlt_section(layout);
2947 if (size == 64 && again)
2948 this->brlt_section_->set_current_size(num_huge_branches);
2950 typedef Unordered_set<Output_section*> Output_sections;
2951 Output_sections os_need_update;
2952 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2953 p != this->stub_tables_.end();
2956 if ((*p)->size_update())
2959 (*p)->add_eh_frame(layout);
2960 os_need_update.insert((*p)->output_section());
2964 // Set output section offsets for all input sections in an output
2965 // section that just changed size. Anything past the stubs will
2967 for (typename Output_sections::iterator p = os_need_update.begin();
2968 p != os_need_update.end();
2971 Output_section* os = *p;
2973 typedef Output_section::Input_section_list Input_section_list;
2974 for (Input_section_list::const_iterator i = os->input_sections().begin();
2975 i != os->input_sections().end();
2978 off = align_address(off, i->addralign());
2979 if (i->is_input_section() || i->is_relaxed_input_section())
2980 i->relobj()->set_section_offset(i->shndx(), off);
2981 if (i->is_relaxed_input_section())
2983 Stub_table<size, big_endian>* stub_table
2984 = static_cast<Stub_table<size, big_endian>*>(
2985 i->relaxed_input_section());
2986 off += stub_table->set_address_and_size(os, off);
2989 off += i->data_size();
2991 // If .branch_lt is part of this output section, then we have
2992 // just done the offset adjustment.
2993 os->clear_section_offsets_need_adjustment();
2998 && num_huge_branches != 0
2999 && parameters->options().output_is_position_independent())
3001 // Fill in the BRLT relocs.
3002 this->brlt_section_->reset_brlt_sizes();
3003 for (typename Branch_lookup_table::const_iterator p
3004 = this->branch_lookup_table_.begin();
3005 p != this->branch_lookup_table_.end();
3008 this->brlt_section_->add_reloc(p->first, p->second);
3010 this->brlt_section_->finalize_brlt_sizes();
3015 template<int size, bool big_endian>
3017 Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
3018 unsigned char* oview,
3022 uint64_t address = plt->address();
3023 off_t len = plt->data_size();
3025 if (plt == this->glink_)
3027 // See Output_data_glink::do_write() for glink contents.
3030 gold_assert(parameters->doing_static_link());
3031 // Static linking may need stubs, to support ifunc and long
3032 // branches. We need to create an output section for
3033 // .eh_frame early in the link process, to have a place to
3034 // attach stub .eh_frame info. We also need to have
3035 // registered a CIE that matches the stub CIE. Both of
3036 // these requirements are satisfied by creating an FDE and
3037 // CIE for .glink, even though static linking will leave
3038 // .glink zero length.
3039 // ??? Hopefully generating an FDE with a zero address range
3040 // won't confuse anything that consumes .eh_frame info.
3042 else if (size == 64)
3044 // There is one word before __glink_PLTresolve
3048 else if (parameters->options().output_is_position_independent())
3050 // There are two FDEs for a position independent glink.
3051 // The first covers the branch table, the second
3052 // __glink_PLTresolve at the end of glink.
3053 off_t resolve_size = this->glink_->pltresolve_size;
3054 if (oview[9] == elfcpp::DW_CFA_nop)
3055 len -= resolve_size;
3058 address += len - resolve_size;
3065 // Must be a stub table.
3066 const Stub_table<size, big_endian>* stub_table
3067 = static_cast<const Stub_table<size, big_endian>*>(plt);
3068 uint64_t stub_address = stub_table->stub_address();
3069 len -= stub_address - address;
3070 address = stub_address;
3073 *paddress = address;
3077 // A class to handle the PLT data.
3079 template<int size, bool big_endian>
3080 class Output_data_plt_powerpc : public Output_section_data_build
3083 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3084 size, big_endian> Reloc_section;
3086 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
3087 Reloc_section* plt_rel,
3089 : Output_section_data_build(size == 32 ? 4 : 8),
3095 // Add an entry to the PLT.
3100 add_ifunc_entry(Symbol*);
3103 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
3105 // Return the .rela.plt section data.
3112 // Return the number of PLT entries.
3116 if (this->current_data_size() == 0)
3118 return ((this->current_data_size() - this->first_plt_entry_offset())
3119 / this->plt_entry_size());
3124 do_adjust_output_section(Output_section* os)
3129 // Write to a map file.
3131 do_print_to_mapfile(Mapfile* mapfile) const
3132 { mapfile->print_output_data(this, this->name_); }
3135 // Return the offset of the first non-reserved PLT entry.
3137 first_plt_entry_offset() const
3139 // IPLT has no reserved entry.
3140 if (this->name_[3] == 'I')
3142 return this->targ_->first_plt_entry_offset();
3145 // Return the size of each PLT entry.
3147 plt_entry_size() const
3149 return this->targ_->plt_entry_size();
3152 // Write out the PLT data.
3154 do_write(Output_file*);
3156 // The reloc section.
3157 Reloc_section* rel_;
3158 // Allows access to .glink for do_write.
3159 Target_powerpc<size, big_endian>* targ_;
3160 // What to report in map file.
3164 // Add an entry to the PLT.
3166 template<int size, bool big_endian>
3168 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
3170 if (!gsym->has_plt_offset())
3172 section_size_type off = this->current_data_size();
3174 off += this->first_plt_entry_offset();
3175 gsym->set_plt_offset(off);
3176 gsym->set_needs_dynsym_entry();
3177 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
3178 this->rel_->add_global(gsym, dynrel, this, off, 0);
3179 off += this->plt_entry_size();
3180 this->set_current_data_size(off);
3184 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3186 template<int size, bool big_endian>
3188 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
3190 if (!gsym->has_plt_offset())
3192 section_size_type off = this->current_data_size();
3193 gsym->set_plt_offset(off);
3194 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3195 if (size == 64 && this->targ_->abiversion() < 2)
3196 dynrel = elfcpp::R_PPC64_JMP_IREL;
3197 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
3198 off += this->plt_entry_size();
3199 this->set_current_data_size(off);
3203 // Add an entry for a local ifunc symbol to the IPLT.
3205 template<int size, bool big_endian>
3207 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
3208 Sized_relobj_file<size, big_endian>* relobj,
3209 unsigned int local_sym_index)
3211 if (!relobj->local_has_plt_offset(local_sym_index))
3213 section_size_type off = this->current_data_size();
3214 relobj->set_local_plt_offset(local_sym_index, off);
3215 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3216 if (size == 64 && this->targ_->abiversion() < 2)
3217 dynrel = elfcpp::R_PPC64_JMP_IREL;
3218 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
3220 off += this->plt_entry_size();
3221 this->set_current_data_size(off);
3225 static const uint32_t add_0_11_11 = 0x7c0b5a14;
3226 static const uint32_t add_2_2_11 = 0x7c425a14;
3227 static const uint32_t add_2_2_12 = 0x7c426214;
3228 static const uint32_t add_3_3_2 = 0x7c631214;
3229 static const uint32_t add_3_3_13 = 0x7c636a14;
3230 static const uint32_t add_11_0_11 = 0x7d605a14;
3231 static const uint32_t add_11_2_11 = 0x7d625a14;
3232 static const uint32_t add_11_11_2 = 0x7d6b1214;
3233 static const uint32_t addi_0_12 = 0x380c0000;
3234 static const uint32_t addi_2_2 = 0x38420000;
3235 static const uint32_t addi_3_3 = 0x38630000;
3236 static const uint32_t addi_11_11 = 0x396b0000;
3237 static const uint32_t addi_12_1 = 0x39810000;
3238 static const uint32_t addi_12_12 = 0x398c0000;
3239 static const uint32_t addis_0_2 = 0x3c020000;
3240 static const uint32_t addis_0_13 = 0x3c0d0000;
3241 static const uint32_t addis_2_12 = 0x3c4c0000;
3242 static const uint32_t addis_11_2 = 0x3d620000;
3243 static const uint32_t addis_11_11 = 0x3d6b0000;
3244 static const uint32_t addis_11_30 = 0x3d7e0000;
3245 static const uint32_t addis_12_1 = 0x3d810000;
3246 static const uint32_t addis_12_2 = 0x3d820000;
3247 static const uint32_t addis_12_12 = 0x3d8c0000;
3248 static const uint32_t b = 0x48000000;
3249 static const uint32_t bcl_20_31 = 0x429f0005;
3250 static const uint32_t bctr = 0x4e800420;
3251 static const uint32_t blr = 0x4e800020;
3252 static const uint32_t bnectr_p4 = 0x4ce20420;
3253 static const uint32_t cmpld_7_12_0 = 0x7fac0040;
3254 static const uint32_t cmpldi_2_0 = 0x28220000;
3255 static const uint32_t cror_15_15_15 = 0x4def7b82;
3256 static const uint32_t cror_31_31_31 = 0x4ffffb82;
3257 static const uint32_t ld_0_1 = 0xe8010000;
3258 static const uint32_t ld_0_12 = 0xe80c0000;
3259 static const uint32_t ld_2_1 = 0xe8410000;
3260 static const uint32_t ld_2_2 = 0xe8420000;
3261 static const uint32_t ld_2_11 = 0xe84b0000;
3262 static const uint32_t ld_2_12 = 0xe84c0000;
3263 static const uint32_t ld_11_2 = 0xe9620000;
3264 static const uint32_t ld_11_11 = 0xe96b0000;
3265 static const uint32_t ld_12_2 = 0xe9820000;
3266 static const uint32_t ld_12_11 = 0xe98b0000;
3267 static const uint32_t ld_12_12 = 0xe98c0000;
3268 static const uint32_t lfd_0_1 = 0xc8010000;
3269 static const uint32_t li_0_0 = 0x38000000;
3270 static const uint32_t li_12_0 = 0x39800000;
3271 static const uint32_t lis_0 = 0x3c000000;
3272 static const uint32_t lis_2 = 0x3c400000;
3273 static const uint32_t lis_11 = 0x3d600000;
3274 static const uint32_t lis_12 = 0x3d800000;
3275 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
3276 static const uint32_t lwz_0_12 = 0x800c0000;
3277 static const uint32_t lwz_11_11 = 0x816b0000;
3278 static const uint32_t lwz_11_30 = 0x817e0000;
3279 static const uint32_t lwz_12_12 = 0x818c0000;
3280 static const uint32_t lwzu_0_12 = 0x840c0000;
3281 static const uint32_t mflr_0 = 0x7c0802a6;
3282 static const uint32_t mflr_11 = 0x7d6802a6;
3283 static const uint32_t mflr_12 = 0x7d8802a6;
3284 static const uint32_t mtctr_0 = 0x7c0903a6;
3285 static const uint32_t mtctr_11 = 0x7d6903a6;
3286 static const uint32_t mtctr_12 = 0x7d8903a6;
3287 static const uint32_t mtlr_0 = 0x7c0803a6;
3288 static const uint32_t mtlr_12 = 0x7d8803a6;
3289 static const uint32_t nop = 0x60000000;
3290 static const uint32_t ori_0_0_0 = 0x60000000;
3291 static const uint32_t srdi_0_0_2 = 0x7800f082;
3292 static const uint32_t std_0_1 = 0xf8010000;
3293 static const uint32_t std_0_12 = 0xf80c0000;
3294 static const uint32_t std_2_1 = 0xf8410000;
3295 static const uint32_t stfd_0_1 = 0xd8010000;
3296 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
3297 static const uint32_t sub_11_11_12 = 0x7d6c5850;
3298 static const uint32_t sub_12_12_11 = 0x7d8b6050;
3299 static const uint32_t xor_2_12_12 = 0x7d826278;
3300 static const uint32_t xor_11_12_12 = 0x7d8b6278;
3302 // Write out the PLT.
3304 template<int size, bool big_endian>
3306 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
3308 if (size == 32 && this->name_[3] != 'I')
3310 const section_size_type offset = this->offset();
3311 const section_size_type oview_size
3312 = convert_to_section_size_type(this->data_size());
3313 unsigned char* const oview = of->get_output_view(offset, oview_size);
3314 unsigned char* pov = oview;
3315 unsigned char* endpov = oview + oview_size;
3317 // The address of the .glink branch table
3318 const Output_data_glink<size, big_endian>* glink
3319 = this->targ_->glink_section();
3320 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
3322 while (pov < endpov)
3324 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
3329 of->write_output_view(offset, oview_size, oview);
3333 // Create the PLT section.
3335 template<int size, bool big_endian>
3337 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
3340 if (this->plt_ == NULL)
3342 if (this->got_ == NULL)
3343 this->got_section(symtab, layout);
3345 if (this->glink_ == NULL)
3346 make_glink_section(layout);
3348 // Ensure that .rela.dyn always appears before .rela.plt This is
3349 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3350 // needs to include .rela.plt in its range.
3351 this->rela_dyn_section(layout);
3353 Reloc_section* plt_rel = new Reloc_section(false);
3354 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
3355 elfcpp::SHF_ALLOC, plt_rel,
3356 ORDER_DYNAMIC_PLT_RELOCS, false);
3358 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
3360 layout->add_output_section_data(".plt",
3362 ? elfcpp::SHT_PROGBITS
3363 : elfcpp::SHT_NOBITS),
3364 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3373 // Create the IPLT section.
3375 template<int size, bool big_endian>
3377 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
3380 if (this->iplt_ == NULL)
3382 this->make_plt_section(symtab, layout);
3384 Reloc_section* iplt_rel = new Reloc_section(false);
3385 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
3387 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
3389 this->plt_->output_section()->add_output_section_data(this->iplt_);
3393 // A section for huge long branch addresses, similar to plt section.
3395 template<int size, bool big_endian>
3396 class Output_data_brlt_powerpc : public Output_section_data_build
3399 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3400 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3401 size, big_endian> Reloc_section;
3403 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
3404 Reloc_section* brlt_rel)
3405 : Output_section_data_build(size == 32 ? 4 : 8),
3413 this->reset_data_size();
3414 this->rel_->reset_data_size();
3418 finalize_brlt_sizes()
3420 this->finalize_data_size();
3421 this->rel_->finalize_data_size();
3424 // Add a reloc for an entry in the BRLT.
3426 add_reloc(Address to, unsigned int off)
3427 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
3429 // Update section and reloc section size.
3431 set_current_size(unsigned int num_branches)
3433 this->reset_address_and_file_offset();
3434 this->set_current_data_size(num_branches * 16);
3435 this->finalize_data_size();
3436 Output_section* os = this->output_section();
3437 os->set_section_offsets_need_adjustment();
3438 if (this->rel_ != NULL)
3440 unsigned int reloc_size
3441 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
3442 this->rel_->reset_address_and_file_offset();
3443 this->rel_->set_current_data_size(num_branches * reloc_size);
3444 this->rel_->finalize_data_size();
3445 Output_section* os = this->rel_->output_section();
3446 os->set_section_offsets_need_adjustment();
3452 do_adjust_output_section(Output_section* os)
3457 // Write to a map file.
3459 do_print_to_mapfile(Mapfile* mapfile) const
3460 { mapfile->print_output_data(this, "** BRLT"); }
3463 // Write out the BRLT data.
3465 do_write(Output_file*);
3467 // The reloc section.
3468 Reloc_section* rel_;
3469 Target_powerpc<size, big_endian>* targ_;
3472 // Make the branch lookup table section.
3474 template<int size, bool big_endian>
3476 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
3478 if (size == 64 && this->brlt_section_ == NULL)
3480 Reloc_section* brlt_rel = NULL;
3481 bool is_pic = parameters->options().output_is_position_independent();
3484 // When PIC we can't fill in .branch_lt (like .plt it can be
3485 // a bss style section) but must initialise at runtime via
3486 // dynamic relocats.
3487 this->rela_dyn_section(layout);
3488 brlt_rel = new Reloc_section(false);
3489 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
3492 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
3493 if (this->plt_ && is_pic)
3494 this->plt_->output_section()
3495 ->add_output_section_data(this->brlt_section_);
3497 layout->add_output_section_data(".branch_lt",
3498 (is_pic ? elfcpp::SHT_NOBITS
3499 : elfcpp::SHT_PROGBITS),
3500 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3501 this->brlt_section_,
3502 (is_pic ? ORDER_SMALL_BSS
3503 : ORDER_SMALL_DATA),
3508 // Write out .branch_lt when non-PIC.
3510 template<int size, bool big_endian>
3512 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
3514 if (size == 64 && !parameters->options().output_is_position_independent())
3516 const section_size_type offset = this->offset();
3517 const section_size_type oview_size
3518 = convert_to_section_size_type(this->data_size());
3519 unsigned char* const oview = of->get_output_view(offset, oview_size);
3521 this->targ_->write_branch_lookup_table(oview);
3522 of->write_output_view(offset, oview_size, oview);
3526 static inline uint32_t
3532 static inline uint32_t
3538 static inline uint32_t
3541 return hi(a + 0x8000);
3547 static const unsigned char eh_frame_cie[12];
3551 const unsigned char Eh_cie<size>::eh_frame_cie[] =
3554 'z', 'R', 0, // Augmentation string.
3555 4, // Code alignment.
3556 0x80 - size / 8 , // Data alignment.
3558 1, // Augmentation size.
3559 (elfcpp::DW_EH_PE_pcrel
3560 | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
3561 elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
3564 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3565 static const unsigned char glink_eh_frame_fde_64v1[] =
3567 0, 0, 0, 0, // Replaced with offset to .glink.
3568 0, 0, 0, 0, // Replaced with size of .glink.
3569 0, // Augmentation size.
3570 elfcpp::DW_CFA_advance_loc + 1,
3571 elfcpp::DW_CFA_register, 65, 12,
3572 elfcpp::DW_CFA_advance_loc + 4,
3573 elfcpp::DW_CFA_restore_extended, 65
3576 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3577 static const unsigned char glink_eh_frame_fde_64v2[] =
3579 0, 0, 0, 0, // Replaced with offset to .glink.
3580 0, 0, 0, 0, // Replaced with size of .glink.
3581 0, // Augmentation size.
3582 elfcpp::DW_CFA_advance_loc + 1,
3583 elfcpp::DW_CFA_register, 65, 0,
3584 elfcpp::DW_CFA_advance_loc + 4,
3585 elfcpp::DW_CFA_restore_extended, 65
3588 // Describe __glink_PLTresolve use of LR, 32-bit version.
3589 static const unsigned char glink_eh_frame_fde_32[] =
3591 0, 0, 0, 0, // Replaced with offset to .glink.
3592 0, 0, 0, 0, // Replaced with size of .glink.
3593 0, // Augmentation size.
3594 elfcpp::DW_CFA_advance_loc + 2,
3595 elfcpp::DW_CFA_register, 65, 0,
3596 elfcpp::DW_CFA_advance_loc + 4,
3597 elfcpp::DW_CFA_restore_extended, 65
3600 static const unsigned char default_fde[] =
3602 0, 0, 0, 0, // Replaced with offset to stubs.
3603 0, 0, 0, 0, // Replaced with size of stubs.
3604 0, // Augmentation size.
3605 elfcpp::DW_CFA_nop, // Pad.
3610 template<bool big_endian>
3612 write_insn(unsigned char* p, uint32_t v)
3614 elfcpp::Swap<32, big_endian>::writeval(p, v);
3617 // Stub_table holds information about plt and long branch stubs.
3618 // Stubs are built in an area following some input section determined
3619 // by group_sections(). This input section is converted to a relaxed
3620 // input section allowing it to be resized to accommodate the stubs
3622 template<int size, bool big_endian>
3623 class Stub_table : public Output_relaxed_input_section
3626 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3627 static const Address invalid_address = static_cast<Address>(0) - 1;
3629 Stub_table(Target_powerpc<size, big_endian>* targ,
3630 Output_section* output_section,
3631 const Output_section::Input_section* owner)
3632 : Output_relaxed_input_section(owner->relobj(), owner->shndx(),
3634 ->section_addralign(owner->shndx())),
3635 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
3636 orig_data_size_(owner->current_data_size()),
3637 plt_size_(0), last_plt_size_(0),
3638 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3639 need_save_res_(false)
3641 this->set_output_section(output_section);
3643 std::vector<Output_relaxed_input_section*> new_relaxed;
3644 new_relaxed.push_back(this);
3645 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3648 // Add a plt call stub.
3650 add_plt_call_entry(Address,
3651 const Sized_relobj_file<size, big_endian>*,
3657 add_plt_call_entry(Address,
3658 const Sized_relobj_file<size, big_endian>*,
3663 // Find a given plt call stub.
3665 find_plt_call_entry(const Symbol*) const;
3668 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3669 unsigned int) const;
3672 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3678 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3683 // Add a long branch stub.
3685 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3686 unsigned int, Address, Address, bool);
3689 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3693 can_reach_stub(Address from, unsigned int off, unsigned int r_type)
3695 Address max_branch_offset = max_branch_delta(r_type);
3696 if (max_branch_offset == 0)
3698 gold_assert(from != invalid_address);
3699 Address loc = off + this->stub_address();
3700 return loc - from + max_branch_offset < 2 * max_branch_offset;
3704 clear_stubs(bool all)
3706 this->plt_call_stubs_.clear();
3707 this->plt_size_ = 0;
3708 this->long_branch_stubs_.clear();
3709 this->branch_size_ = 0;
3710 this->need_save_res_ = false;
3713 this->last_plt_size_ = 0;
3714 this->last_branch_size_ = 0;
3719 set_address_and_size(const Output_section* os, Address off)
3721 Address start_off = off;
3722 off += this->orig_data_size_;
3723 Address my_size = this->plt_size_ + this->branch_size_;
3724 if (this->need_save_res_)
3725 my_size += this->targ_->savres_section()->data_size();
3727 off = align_address(off, this->stub_align());
3728 // Include original section size and alignment padding in size
3729 my_size += off - start_off;
3730 this->reset_address_and_file_offset();
3731 this->set_current_data_size(my_size);
3732 this->set_address_and_file_offset(os->address() + start_off,
3733 os->offset() + start_off);
3738 stub_address() const
3740 return align_address(this->address() + this->orig_data_size_,
3741 this->stub_align());
3747 return align_address(this->offset() + this->orig_data_size_,
3748 this->stub_align());
3753 { return this->plt_size_; }
3758 Output_section* os = this->output_section();
3759 if (os->addralign() < this->stub_align())
3761 os->set_addralign(this->stub_align());
3762 // FIXME: get rid of the insane checkpointing.
3763 // We can't increase alignment of the input section to which
3764 // stubs are attached; The input section may be .init which
3765 // is pasted together with other .init sections to form a
3766 // function. Aligning might insert zero padding resulting in
3767 // sigill. However we do need to increase alignment of the
3768 // output section so that the align_address() on offset in
3769 // set_address_and_size() adds the same padding as the
3770 // align_address() on address in stub_address().
3771 // What's more, we need this alignment for the layout done in
3772 // relaxation_loop_body() so that the output section starts at
3773 // a suitably aligned address.
3774 os->checkpoint_set_addralign(this->stub_align());
3776 if (this->last_plt_size_ != this->plt_size_
3777 || this->last_branch_size_ != this->branch_size_)
3779 this->last_plt_size_ = this->plt_size_;
3780 this->last_branch_size_ = this->branch_size_;
3786 // Add .eh_frame info for this stub section. Unlike other linker
3787 // generated .eh_frame this is added late in the link, because we
3788 // only want the .eh_frame info if this particular stub section is
3791 add_eh_frame(Layout* layout)
3793 if (!this->eh_frame_added_)
3795 if (!parameters->options().ld_generated_unwind_info())
3798 // Since we add stub .eh_frame info late, it must be placed
3799 // after all other linker generated .eh_frame info so that
3800 // merge mapping need not be updated for input sections.
3801 // There is no provision to use a different CIE to that used
3803 if (!this->targ_->has_glink())
3806 layout->add_eh_frame_for_plt(this,
3807 Eh_cie<size>::eh_frame_cie,
3808 sizeof (Eh_cie<size>::eh_frame_cie),
3810 sizeof (default_fde));
3811 this->eh_frame_added_ = true;
3815 Target_powerpc<size, big_endian>*
3821 class Plt_stub_ent_hash;
3822 typedef Unordered_map<Plt_stub_ent, unsigned int,
3823 Plt_stub_ent_hash> Plt_stub_entries;
3825 // Alignment of stub section.
3831 unsigned int min_align = 32;
3832 unsigned int user_align = 1 << parameters->options().plt_align();
3833 return std::max(user_align, min_align);
3836 // Return the plt offset for the given call stub.
3838 plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const
3840 const Symbol* gsym = p->first.sym_;
3843 *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC
3844 && gsym->can_use_relative_reloc(false));
3845 return gsym->plt_offset();
3850 const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
3851 unsigned int local_sym_index = p->first.locsym_;
3852 return relobj->local_plt_offset(local_sym_index);
3856 // Size of a given plt call stub.
3858 plt_call_size(typename Plt_stub_entries::const_iterator p) const
3864 Address plt_addr = this->plt_off(p, &is_iplt);
3866 plt_addr += this->targ_->iplt_section()->address();
3868 plt_addr += this->targ_->plt_section()->address();
3869 Address got_addr = this->targ_->got_section()->output_section()->address();
3870 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3871 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
3872 got_addr += ppcobj->toc_base_offset();
3873 Address off = plt_addr - got_addr;
3874 unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0);
3875 if (this->targ_->abiversion() < 2)
3877 bool static_chain = parameters->options().plt_static_chain();
3878 bool thread_safe = this->targ_->plt_thread_safe();
3882 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
3884 unsigned int align = 1 << parameters->options().plt_align();
3886 bytes = (bytes + align - 1) & -align;
3890 // Return long branch stub size.
3892 branch_stub_size(Address to)
3895 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
3896 if (to - loc + (1 << 25) < 2 << 25)
3898 if (size == 64 || !parameters->options().output_is_position_independent())
3905 do_write(Output_file*);
3907 // Plt call stub keys.
3911 Plt_stub_ent(const Symbol* sym)
3912 : sym_(sym), object_(0), addend_(0), locsym_(0)
3915 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3916 unsigned int locsym_index)
3917 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3920 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3922 unsigned int r_type,
3924 : sym_(sym), object_(0), addend_(0), locsym_(0)
3927 this->addend_ = addend;
3928 else if (parameters->options().output_is_position_independent()
3929 && r_type == elfcpp::R_PPC_PLTREL24)
3931 this->addend_ = addend;
3932 if (this->addend_ >= 32768)
3933 this->object_ = object;
3937 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3938 unsigned int locsym_index,
3939 unsigned int r_type,
3941 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3944 this->addend_ = addend;
3945 else if (parameters->options().output_is_position_independent()
3946 && r_type == elfcpp::R_PPC_PLTREL24)
3947 this->addend_ = addend;
3950 bool operator==(const Plt_stub_ent& that) const
3952 return (this->sym_ == that.sym_
3953 && this->object_ == that.object_
3954 && this->addend_ == that.addend_
3955 && this->locsym_ == that.locsym_);
3959 const Sized_relobj_file<size, big_endian>* object_;
3960 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
3961 unsigned int locsym_;
3964 class Plt_stub_ent_hash
3967 size_t operator()(const Plt_stub_ent& ent) const
3969 return (reinterpret_cast<uintptr_t>(ent.sym_)
3970 ^ reinterpret_cast<uintptr_t>(ent.object_)
3976 // Long branch stub keys.
3977 class Branch_stub_ent
3980 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj,
3981 Address to, bool save_res)
3982 : dest_(to), toc_base_off_(0), save_res_(save_res)
3985 toc_base_off_ = obj->toc_base_offset();
3988 bool operator==(const Branch_stub_ent& that) const
3990 return (this->dest_ == that.dest_
3992 || this->toc_base_off_ == that.toc_base_off_));
3996 unsigned int toc_base_off_;
4000 class Branch_stub_ent_hash
4003 size_t operator()(const Branch_stub_ent& ent) const
4004 { return ent.dest_ ^ ent.toc_base_off_; }
4007 // In a sane world this would be a global.
4008 Target_powerpc<size, big_endian>* targ_;
4009 // Map sym/object/addend to stub offset.
4010 Plt_stub_entries plt_call_stubs_;
4011 // Map destination address to stub offset.
4012 typedef Unordered_map<Branch_stub_ent, unsigned int,
4013 Branch_stub_ent_hash> Branch_stub_entries;
4014 Branch_stub_entries long_branch_stubs_;
4015 // size of input section
4016 section_size_type orig_data_size_;
4018 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
4019 // Whether .eh_frame info has been created for this stub section.
4020 bool eh_frame_added_;
4021 // Set if this stub group needs a copy of out-of-line register
4022 // save/restore functions.
4023 bool need_save_res_;
4026 // Add a plt call stub, if we do not already have one for this
4027 // sym/object/addend combo.
4029 template<int size, bool big_endian>
4031 Stub_table<size, big_endian>::add_plt_call_entry(
4033 const Sized_relobj_file<size, big_endian>* object,
4035 unsigned int r_type,
4038 Plt_stub_ent ent(object, gsym, r_type, addend);
4039 unsigned int off = this->plt_size_;
4040 std::pair<typename Plt_stub_entries::iterator, bool> p
4041 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
4043 this->plt_size_ = off + this->plt_call_size(p.first);
4044 return this->can_reach_stub(from, off, r_type);
4047 template<int size, bool big_endian>
4049 Stub_table<size, big_endian>::add_plt_call_entry(
4051 const Sized_relobj_file<size, big_endian>* object,
4052 unsigned int locsym_index,
4053 unsigned int r_type,
4056 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4057 unsigned int off = this->plt_size_;
4058 std::pair<typename Plt_stub_entries::iterator, bool> p
4059 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
4061 this->plt_size_ = off + this->plt_call_size(p.first);
4062 return this->can_reach_stub(from, off, r_type);
4065 // Find a plt call stub.
4067 template<int size, bool big_endian>
4068 typename Stub_table<size, big_endian>::Address
4069 Stub_table<size, big_endian>::find_plt_call_entry(
4070 const Sized_relobj_file<size, big_endian>* object,
4072 unsigned int r_type,
4073 Address addend) const
4075 Plt_stub_ent ent(object, gsym, r_type, addend);
4076 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4077 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4080 template<int size, bool big_endian>
4081 typename Stub_table<size, big_endian>::Address
4082 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
4084 Plt_stub_ent ent(gsym);
4085 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4086 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4089 template<int size, bool big_endian>
4090 typename Stub_table<size, big_endian>::Address
4091 Stub_table<size, big_endian>::find_plt_call_entry(
4092 const Sized_relobj_file<size, big_endian>* object,
4093 unsigned int locsym_index,
4094 unsigned int r_type,
4095 Address addend) const
4097 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4098 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4099 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4102 template<int size, bool big_endian>
4103 typename Stub_table<size, big_endian>::Address
4104 Stub_table<size, big_endian>::find_plt_call_entry(
4105 const Sized_relobj_file<size, big_endian>* object,
4106 unsigned int locsym_index) const
4108 Plt_stub_ent ent(object, locsym_index);
4109 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4110 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4113 // Add a long branch stub if we don't already have one to given
4116 template<int size, bool big_endian>
4118 Stub_table<size, big_endian>::add_long_branch_entry(
4119 const Powerpc_relobj<size, big_endian>* object,
4120 unsigned int r_type,
4125 Branch_stub_ent ent(object, to, save_res);
4126 Address off = this->branch_size_;
4127 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
4130 this->need_save_res_ = true;
4133 unsigned int stub_size = this->branch_stub_size(to);
4134 this->branch_size_ = off + stub_size;
4135 if (size == 64 && stub_size != 4)
4136 this->targ_->add_branch_lookup_table(to);
4139 return this->can_reach_stub(from, off, r_type);
4142 // Find long branch stub offset.
4144 template<int size, bool big_endian>
4145 typename Stub_table<size, big_endian>::Address
4146 Stub_table<size, big_endian>::find_long_branch_entry(
4147 const Powerpc_relobj<size, big_endian>* object,
4150 Branch_stub_ent ent(object, to, false);
4151 typename Branch_stub_entries::const_iterator p
4152 = this->long_branch_stubs_.find(ent);
4153 if (p == this->long_branch_stubs_.end())
4154 return invalid_address;
4155 if (p->first.save_res_)
4156 return to - this->targ_->savres_section()->address() + this->branch_size_;
4160 // A class to handle .glink.
4162 template<int size, bool big_endian>
4163 class Output_data_glink : public Output_section_data
4166 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4167 static const Address invalid_address = static_cast<Address>(0) - 1;
4168 static const int pltresolve_size = 16*4;
4170 Output_data_glink(Target_powerpc<size, big_endian>* targ)
4171 : Output_section_data(16), targ_(targ), global_entry_stubs_(),
4172 end_branch_table_(), ge_size_(0)
4176 add_eh_frame(Layout* layout);
4179 add_global_entry(const Symbol*);
4182 find_global_entry(const Symbol*) const;
4185 global_entry_address() const
4187 gold_assert(this->is_data_size_valid());
4188 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4189 return this->address() + global_entry_off;
4193 // Write to a map file.
4195 do_print_to_mapfile(Mapfile* mapfile) const
4196 { mapfile->print_output_data(this, _("** glink")); }
4200 set_final_data_size();
4204 do_write(Output_file*);
4206 // Allows access to .got and .plt for do_write.
4207 Target_powerpc<size, big_endian>* targ_;
4209 // Map sym to stub offset.
4210 typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries;
4211 Global_entry_stub_entries global_entry_stubs_;
4213 unsigned int end_branch_table_, ge_size_;
4216 template<int size, bool big_endian>
4218 Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout)
4220 if (!parameters->options().ld_generated_unwind_info())
4225 if (this->targ_->abiversion() < 2)
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_64v1,
4230 sizeof (glink_eh_frame_fde_64v1));
4232 layout->add_eh_frame_for_plt(this,
4233 Eh_cie<64>::eh_frame_cie,
4234 sizeof (Eh_cie<64>::eh_frame_cie),
4235 glink_eh_frame_fde_64v2,
4236 sizeof (glink_eh_frame_fde_64v2));
4240 // 32-bit .glink can use the default since the CIE return
4241 // address reg, LR, is valid.
4242 layout->add_eh_frame_for_plt(this,
4243 Eh_cie<32>::eh_frame_cie,
4244 sizeof (Eh_cie<32>::eh_frame_cie),
4246 sizeof (default_fde));
4247 // Except where LR is used in a PIC __glink_PLTresolve.
4248 if (parameters->options().output_is_position_independent())
4249 layout->add_eh_frame_for_plt(this,
4250 Eh_cie<32>::eh_frame_cie,
4251 sizeof (Eh_cie<32>::eh_frame_cie),
4252 glink_eh_frame_fde_32,
4253 sizeof (glink_eh_frame_fde_32));
4257 template<int size, bool big_endian>
4259 Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym)
4261 std::pair<typename Global_entry_stub_entries::iterator, bool> p
4262 = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_));
4264 this->ge_size_ += 16;
4267 template<int size, bool big_endian>
4268 typename Output_data_glink<size, big_endian>::Address
4269 Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const
4271 typename Global_entry_stub_entries::const_iterator p
4272 = this->global_entry_stubs_.find(gsym);
4273 return p == this->global_entry_stubs_.end() ? invalid_address : p->second;
4276 template<int size, bool big_endian>
4278 Output_data_glink<size, big_endian>::set_final_data_size()
4280 unsigned int count = this->targ_->plt_entry_count();
4281 section_size_type total = 0;
4287 // space for branch table
4288 total += 4 * (count - 1);
4290 total += -total & 15;
4291 total += this->pltresolve_size;
4295 total += this->pltresolve_size;
4297 // space for branch table
4299 if (this->targ_->abiversion() < 2)
4303 total += 4 * (count - 0x8000);
4307 this->end_branch_table_ = total;
4308 total = (total + 15) & -16;
4309 total += this->ge_size_;
4311 this->set_data_size(total);
4314 // Write out plt and long branch stub code.
4316 template<int size, bool big_endian>
4318 Stub_table<size, big_endian>::do_write(Output_file* of)
4320 if (this->plt_call_stubs_.empty()
4321 && this->long_branch_stubs_.empty())
4324 const section_size_type start_off = this->offset();
4325 const section_size_type off = this->stub_offset();
4326 const section_size_type oview_size =
4327 convert_to_section_size_type(this->data_size() - (off - start_off));
4328 unsigned char* const oview = of->get_output_view(off, oview_size);
4333 const Output_data_got_powerpc<size, big_endian>* got
4334 = this->targ_->got_section();
4335 Address got_os_addr = got->output_section()->address();
4337 if (!this->plt_call_stubs_.empty())
4339 // The base address of the .plt section.
4340 Address plt_base = this->targ_->plt_section()->address();
4341 Address iplt_base = invalid_address;
4343 // Write out plt call stubs.
4344 typename Plt_stub_entries::const_iterator cs;
4345 for (cs = this->plt_call_stubs_.begin();
4346 cs != this->plt_call_stubs_.end();
4350 Address pltoff = this->plt_off(cs, &is_iplt);
4351 Address plt_addr = pltoff;
4354 if (iplt_base == invalid_address)
4355 iplt_base = this->targ_->iplt_section()->address();
4356 plt_addr += iplt_base;
4359 plt_addr += plt_base;
4360 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
4361 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
4362 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
4363 Address off = plt_addr - got_addr;
4365 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
4366 gold_error(_("%s: linkage table error against `%s'"),
4367 cs->first.object_->name().c_str(),
4368 cs->first.sym_->demangled_name().c_str());
4370 bool plt_load_toc = this->targ_->abiversion() < 2;
4372 = plt_load_toc && parameters->options().plt_static_chain();
4374 = plt_load_toc && this->targ_->plt_thread_safe();
4375 bool use_fake_dep = false;
4376 Address cmp_branch_off = 0;
4379 unsigned int pltindex
4380 = ((pltoff - this->targ_->first_plt_entry_offset())
4381 / this->targ_->plt_entry_size());
4383 = (this->targ_->glink_section()->pltresolve_size
4385 if (pltindex > 32768)
4386 glinkoff += (pltindex - 32768) * 4;
4388 = this->targ_->glink_section()->address() + glinkoff;
4390 = (this->stub_address() + cs->second + 24
4391 + 4 * (ha(off) != 0)
4392 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
4393 + 4 * static_chain);
4394 cmp_branch_off = to - from;
4395 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
4398 p = oview + cs->second;
4401 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4405 write_insn<big_endian>(p, addis_11_2 + ha(off));
4407 write_insn<big_endian>(p, ld_12_11 + l(off));
4412 write_insn<big_endian>(p, addis_12_2 + ha(off));
4414 write_insn<big_endian>(p, ld_12_12 + l(off));
4418 && ha(off + 8 + 8 * static_chain) != ha(off))
4420 write_insn<big_endian>(p, addi_11_11 + l(off));
4424 write_insn<big_endian>(p, mtctr_12);
4430 write_insn<big_endian>(p, xor_2_12_12);
4432 write_insn<big_endian>(p, add_11_11_2);
4435 write_insn<big_endian>(p, ld_2_11 + l(off + 8));
4439 write_insn<big_endian>(p, ld_11_11 + l(off + 16));
4446 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4448 write_insn<big_endian>(p, ld_12_2 + l(off));
4451 && ha(off + 8 + 8 * static_chain) != ha(off))
4453 write_insn<big_endian>(p, addi_2_2 + l(off));
4457 write_insn<big_endian>(p, mtctr_12);
4463 write_insn<big_endian>(p, xor_11_12_12);
4465 write_insn<big_endian>(p, add_2_2_11);
4470 write_insn<big_endian>(p, ld_11_2 + l(off + 16));
4473 write_insn<big_endian>(p, ld_2_2 + l(off + 8));
4477 if (thread_safe && !use_fake_dep)
4479 write_insn<big_endian>(p, cmpldi_2_0);
4481 write_insn<big_endian>(p, bnectr_p4);
4483 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
4486 write_insn<big_endian>(p, bctr);
4490 // Write out long branch stubs.
4491 typename Branch_stub_entries::const_iterator bs;
4492 for (bs = this->long_branch_stubs_.begin();
4493 bs != this->long_branch_stubs_.end();
4496 if (bs->first.save_res_)
4498 p = oview + this->plt_size_ + bs->second;
4499 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4500 Address delta = bs->first.dest_ - loc;
4501 if (delta + (1 << 25) < 2 << 25)
4502 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4506 = this->targ_->find_branch_lookup_table(bs->first.dest_);
4507 gold_assert(brlt_addr != invalid_address);
4508 brlt_addr += this->targ_->brlt_section()->address();
4509 Address got_addr = got_os_addr + bs->first.toc_base_off_;
4510 Address brltoff = brlt_addr - got_addr;
4511 if (ha(brltoff) == 0)
4513 write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4;
4517 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
4518 write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4;
4520 write_insn<big_endian>(p, mtctr_12), p += 4;
4521 write_insn<big_endian>(p, bctr);
4527 if (!this->plt_call_stubs_.empty())
4529 // The base address of the .plt section.
4530 Address plt_base = this->targ_->plt_section()->address();
4531 Address iplt_base = invalid_address;
4532 // The address of _GLOBAL_OFFSET_TABLE_.
4533 Address g_o_t = invalid_address;
4535 // Write out plt call stubs.
4536 typename Plt_stub_entries::const_iterator cs;
4537 for (cs = this->plt_call_stubs_.begin();
4538 cs != this->plt_call_stubs_.end();
4542 Address plt_addr = this->plt_off(cs, &is_iplt);
4545 if (iplt_base == invalid_address)
4546 iplt_base = this->targ_->iplt_section()->address();
4547 plt_addr += iplt_base;
4550 plt_addr += plt_base;
4552 p = oview + cs->second;
4553 if (parameters->options().output_is_position_independent())
4556 const Powerpc_relobj<size, big_endian>* ppcobj
4557 = (static_cast<const Powerpc_relobj<size, big_endian>*>
4558 (cs->first.object_));
4559 if (ppcobj != NULL && cs->first.addend_ >= 32768)
4561 unsigned int got2 = ppcobj->got2_shndx();
4562 got_addr = ppcobj->get_output_section_offset(got2);
4563 gold_assert(got_addr != invalid_address);
4564 got_addr += (ppcobj->output_section(got2)->address()
4565 + cs->first.addend_);
4569 if (g_o_t == invalid_address)
4571 const Output_data_got_powerpc<size, big_endian>* got
4572 = this->targ_->got_section();
4573 g_o_t = got->address() + got->g_o_t();
4578 Address off = plt_addr - got_addr;
4581 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
4582 write_insn<big_endian>(p + 4, mtctr_11);
4583 write_insn<big_endian>(p + 8, bctr);
4587 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
4588 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
4589 write_insn<big_endian>(p + 8, mtctr_11);
4590 write_insn<big_endian>(p + 12, bctr);
4595 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
4596 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
4597 write_insn<big_endian>(p + 8, mtctr_11);
4598 write_insn<big_endian>(p + 12, bctr);
4603 // Write out long branch stubs.
4604 typename Branch_stub_entries::const_iterator bs;
4605 for (bs = this->long_branch_stubs_.begin();
4606 bs != this->long_branch_stubs_.end();
4609 if (bs->first.save_res_)
4611 p = oview + this->plt_size_ + bs->second;
4612 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4613 Address delta = bs->first.dest_ - loc;
4614 if (delta + (1 << 25) < 2 << 25)
4615 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4616 else if (!parameters->options().output_is_position_independent())
4618 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
4619 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
4620 write_insn<big_endian>(p + 8, mtctr_12);
4621 write_insn<big_endian>(p + 12, bctr);
4626 write_insn<big_endian>(p + 0, mflr_0);
4627 write_insn<big_endian>(p + 4, bcl_20_31);
4628 write_insn<big_endian>(p + 8, mflr_12);
4629 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
4630 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
4631 write_insn<big_endian>(p + 20, mtlr_0);
4632 write_insn<big_endian>(p + 24, mtctr_12);
4633 write_insn<big_endian>(p + 28, bctr);
4637 if (this->need_save_res_)
4639 p = oview + this->plt_size_ + this->branch_size_;
4640 memcpy (p, this->targ_->savres_section()->contents(),
4641 this->targ_->savres_section()->data_size());
4645 // Write out .glink.
4647 template<int size, bool big_endian>
4649 Output_data_glink<size, big_endian>::do_write(Output_file* of)
4651 const section_size_type off = this->offset();
4652 const section_size_type oview_size =
4653 convert_to_section_size_type(this->data_size());
4654 unsigned char* const oview = of->get_output_view(off, oview_size);
4657 // The base address of the .plt section.
4658 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4659 Address plt_base = this->targ_->plt_section()->address();
4663 if (this->end_branch_table_ != 0)
4665 // Write pltresolve stub.
4667 Address after_bcl = this->address() + 16;
4668 Address pltoff = plt_base - after_bcl;
4670 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
4672 if (this->targ_->abiversion() < 2)
4674 write_insn<big_endian>(p, mflr_12), p += 4;
4675 write_insn<big_endian>(p, bcl_20_31), p += 4;
4676 write_insn<big_endian>(p, mflr_11), p += 4;
4677 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4678 write_insn<big_endian>(p, mtlr_12), p += 4;
4679 write_insn<big_endian>(p, add_11_2_11), p += 4;
4680 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4681 write_insn<big_endian>(p, ld_2_11 + 8), p += 4;
4682 write_insn<big_endian>(p, mtctr_12), p += 4;
4683 write_insn<big_endian>(p, ld_11_11 + 16), p += 4;
4687 write_insn<big_endian>(p, mflr_0), p += 4;
4688 write_insn<big_endian>(p, bcl_20_31), p += 4;
4689 write_insn<big_endian>(p, mflr_11), p += 4;
4690 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4691 write_insn<big_endian>(p, mtlr_0), p += 4;
4692 write_insn<big_endian>(p, sub_12_12_11), p += 4;
4693 write_insn<big_endian>(p, add_11_2_11), p += 4;
4694 write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4;
4695 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4696 write_insn<big_endian>(p, srdi_0_0_2), p += 4;
4697 write_insn<big_endian>(p, mtctr_12), p += 4;
4698 write_insn<big_endian>(p, ld_11_11 + 8), p += 4;
4700 write_insn<big_endian>(p, bctr), p += 4;
4701 while (p < oview + this->pltresolve_size)
4702 write_insn<big_endian>(p, nop), p += 4;
4704 // Write lazy link call stubs.
4706 while (p < oview + this->end_branch_table_)
4708 if (this->targ_->abiversion() < 2)
4712 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
4716 write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4;
4717 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
4720 uint32_t branch_off = 8 - (p - oview);
4721 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
4726 Address plt_base = this->targ_->plt_section()->address();
4727 Address iplt_base = invalid_address;
4728 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4729 Address global_entry_base = this->address() + global_entry_off;
4730 typename Global_entry_stub_entries::const_iterator ge;
4731 for (ge = this->global_entry_stubs_.begin();
4732 ge != this->global_entry_stubs_.end();
4735 p = oview + global_entry_off + ge->second;
4736 Address plt_addr = ge->first->plt_offset();
4737 if (ge->first->type() == elfcpp::STT_GNU_IFUNC
4738 && ge->first->can_use_relative_reloc(false))
4740 if (iplt_base == invalid_address)
4741 iplt_base = this->targ_->iplt_section()->address();
4742 plt_addr += iplt_base;
4745 plt_addr += plt_base;
4746 Address my_addr = global_entry_base + ge->second;
4747 Address off = plt_addr - my_addr;
4749 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
4750 gold_error(_("%s: linkage table error against `%s'"),
4751 ge->first->object()->name().c_str(),
4752 ge->first->demangled_name().c_str());
4754 write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4;
4755 write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4;
4756 write_insn<big_endian>(p, mtctr_12), p += 4;
4757 write_insn<big_endian>(p, bctr);
4762 const Output_data_got_powerpc<size, big_endian>* got
4763 = this->targ_->got_section();
4764 // The address of _GLOBAL_OFFSET_TABLE_.
4765 Address g_o_t = got->address() + got->g_o_t();
4767 // Write out pltresolve branch table.
4769 unsigned int the_end = oview_size - this->pltresolve_size;
4770 unsigned char* end_p = oview + the_end;
4771 while (p < end_p - 8 * 4)
4772 write_insn<big_endian>(p, b + end_p - p), p += 4;
4774 write_insn<big_endian>(p, nop), p += 4;
4776 // Write out pltresolve call stub.
4777 if (parameters->options().output_is_position_independent())
4779 Address res0_off = 0;
4780 Address after_bcl_off = the_end + 12;
4781 Address bcl_res0 = after_bcl_off - res0_off;
4783 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
4784 write_insn<big_endian>(p + 4, mflr_0);
4785 write_insn<big_endian>(p + 8, bcl_20_31);
4786 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
4787 write_insn<big_endian>(p + 16, mflr_12);
4788 write_insn<big_endian>(p + 20, mtlr_0);
4789 write_insn<big_endian>(p + 24, sub_11_11_12);
4791 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
4793 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
4794 if (ha(got_bcl) == ha(got_bcl + 4))
4796 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
4797 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
4801 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
4802 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
4804 write_insn<big_endian>(p + 40, mtctr_0);
4805 write_insn<big_endian>(p + 44, add_0_11_11);
4806 write_insn<big_endian>(p + 48, add_11_0_11);
4807 write_insn<big_endian>(p + 52, bctr);
4808 write_insn<big_endian>(p + 56, nop);
4809 write_insn<big_endian>(p + 60, nop);
4813 Address res0 = this->address();
4815 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
4816 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
4817 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4818 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
4820 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
4821 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
4822 write_insn<big_endian>(p + 16, mtctr_0);
4823 write_insn<big_endian>(p + 20, add_0_11_11);
4824 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4825 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
4827 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
4828 write_insn<big_endian>(p + 28, add_11_0_11);
4829 write_insn<big_endian>(p + 32, bctr);
4830 write_insn<big_endian>(p + 36, nop);
4831 write_insn<big_endian>(p + 40, nop);
4832 write_insn<big_endian>(p + 44, nop);
4833 write_insn<big_endian>(p + 48, nop);
4834 write_insn<big_endian>(p + 52, nop);
4835 write_insn<big_endian>(p + 56, nop);
4836 write_insn<big_endian>(p + 60, nop);
4841 of->write_output_view(off, oview_size, oview);
4845 // A class to handle linker generated save/restore functions.
4847 template<int size, bool big_endian>
4848 class Output_data_save_res : public Output_section_data_build
4851 Output_data_save_res(Symbol_table* symtab);
4853 const unsigned char*
4860 // Write to a map file.
4862 do_print_to_mapfile(Mapfile* mapfile) const
4863 { mapfile->print_output_data(this, _("** save/restore")); }
4866 do_write(Output_file*);
4869 // The maximum size of save/restore contents.
4870 static const unsigned int savres_max = 218*4;
4873 savres_define(Symbol_table* symtab,
4875 unsigned int lo, unsigned int hi,
4876 unsigned char* write_ent(unsigned char*, int),
4877 unsigned char* write_tail(unsigned char*, int));
4879 unsigned char *contents_;
4882 template<bool big_endian>
4883 static unsigned char*
4884 savegpr0(unsigned char* p, int r)
4886 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4887 write_insn<big_endian>(p, insn);
4891 template<bool big_endian>
4892 static unsigned char*
4893 savegpr0_tail(unsigned char* p, int r)
4895 p = savegpr0<big_endian>(p, r);
4896 uint32_t insn = std_0_1 + 16;
4897 write_insn<big_endian>(p, insn);
4899 write_insn<big_endian>(p, blr);
4903 template<bool big_endian>
4904 static unsigned char*
4905 restgpr0(unsigned char* p, int r)
4907 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4908 write_insn<big_endian>(p, insn);
4912 template<bool big_endian>
4913 static unsigned char*
4914 restgpr0_tail(unsigned char* p, int r)
4916 uint32_t insn = ld_0_1 + 16;
4917 write_insn<big_endian>(p, insn);
4919 p = restgpr0<big_endian>(p, r);
4920 write_insn<big_endian>(p, mtlr_0);
4924 p = restgpr0<big_endian>(p, 30);
4925 p = restgpr0<big_endian>(p, 31);
4927 write_insn<big_endian>(p, blr);
4931 template<bool big_endian>
4932 static unsigned char*
4933 savegpr1(unsigned char* p, int r)
4935 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4936 write_insn<big_endian>(p, insn);
4940 template<bool big_endian>
4941 static unsigned char*
4942 savegpr1_tail(unsigned char* p, int r)
4944 p = savegpr1<big_endian>(p, r);
4945 write_insn<big_endian>(p, blr);
4949 template<bool big_endian>
4950 static unsigned char*
4951 restgpr1(unsigned char* p, int r)
4953 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4954 write_insn<big_endian>(p, insn);
4958 template<bool big_endian>
4959 static unsigned char*
4960 restgpr1_tail(unsigned char* p, int r)
4962 p = restgpr1<big_endian>(p, r);
4963 write_insn<big_endian>(p, blr);
4967 template<bool big_endian>
4968 static unsigned char*
4969 savefpr(unsigned char* p, int r)
4971 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4972 write_insn<big_endian>(p, insn);
4976 template<bool big_endian>
4977 static unsigned char*
4978 savefpr0_tail(unsigned char* p, int r)
4980 p = savefpr<big_endian>(p, r);
4981 write_insn<big_endian>(p, std_0_1 + 16);
4983 write_insn<big_endian>(p, blr);
4987 template<bool big_endian>
4988 static unsigned char*
4989 restfpr(unsigned char* p, int r)
4991 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4992 write_insn<big_endian>(p, insn);
4996 template<bool big_endian>
4997 static unsigned char*
4998 restfpr0_tail(unsigned char* p, int r)
5000 write_insn<big_endian>(p, ld_0_1 + 16);
5002 p = restfpr<big_endian>(p, r);
5003 write_insn<big_endian>(p, mtlr_0);
5007 p = restfpr<big_endian>(p, 30);
5008 p = restfpr<big_endian>(p, 31);
5010 write_insn<big_endian>(p, blr);
5014 template<bool big_endian>
5015 static unsigned char*
5016 savefpr1_tail(unsigned char* p, int r)
5018 p = savefpr<big_endian>(p, r);
5019 write_insn<big_endian>(p, blr);
5023 template<bool big_endian>
5024 static unsigned char*
5025 restfpr1_tail(unsigned char* p, int r)
5027 p = restfpr<big_endian>(p, r);
5028 write_insn<big_endian>(p, blr);
5032 template<bool big_endian>
5033 static unsigned char*
5034 savevr(unsigned char* p, int r)
5036 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5037 write_insn<big_endian>(p, insn);
5039 insn = stvx_0_12_0 + (r << 21);
5040 write_insn<big_endian>(p, insn);
5044 template<bool big_endian>
5045 static unsigned char*
5046 savevr_tail(unsigned char* p, int r)
5048 p = savevr<big_endian>(p, r);
5049 write_insn<big_endian>(p, blr);
5053 template<bool big_endian>
5054 static unsigned char*
5055 restvr(unsigned char* p, int r)
5057 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5058 write_insn<big_endian>(p, insn);
5060 insn = lvx_0_12_0 + (r << 21);
5061 write_insn<big_endian>(p, insn);
5065 template<bool big_endian>
5066 static unsigned char*
5067 restvr_tail(unsigned char* p, int r)
5069 p = restvr<big_endian>(p, r);
5070 write_insn<big_endian>(p, blr);
5075 template<int size, bool big_endian>
5076 Output_data_save_res<size, big_endian>::Output_data_save_res(
5077 Symbol_table* symtab)
5078 : Output_section_data_build(4),
5081 this->savres_define(symtab,
5082 "_savegpr0_", 14, 31,
5083 savegpr0<big_endian>, savegpr0_tail<big_endian>);
5084 this->savres_define(symtab,
5085 "_restgpr0_", 14, 29,
5086 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5087 this->savres_define(symtab,
5088 "_restgpr0_", 30, 31,
5089 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5090 this->savres_define(symtab,
5091 "_savegpr1_", 14, 31,
5092 savegpr1<big_endian>, savegpr1_tail<big_endian>);
5093 this->savres_define(symtab,
5094 "_restgpr1_", 14, 31,
5095 restgpr1<big_endian>, restgpr1_tail<big_endian>);
5096 this->savres_define(symtab,
5097 "_savefpr_", 14, 31,
5098 savefpr<big_endian>, savefpr0_tail<big_endian>);
5099 this->savres_define(symtab,
5100 "_restfpr_", 14, 29,
5101 restfpr<big_endian>, restfpr0_tail<big_endian>);
5102 this->savres_define(symtab,
5103 "_restfpr_", 30, 31,
5104 restfpr<big_endian>, restfpr0_tail<big_endian>);
5105 this->savres_define(symtab,
5107 savefpr<big_endian>, savefpr1_tail<big_endian>);
5108 this->savres_define(symtab,
5110 restfpr<big_endian>, restfpr1_tail<big_endian>);
5111 this->savres_define(symtab,
5113 savevr<big_endian>, savevr_tail<big_endian>);
5114 this->savres_define(symtab,
5116 restvr<big_endian>, restvr_tail<big_endian>);
5119 template<int size, bool big_endian>
5121 Output_data_save_res<size, big_endian>::savres_define(
5122 Symbol_table* symtab,
5124 unsigned int lo, unsigned int hi,
5125 unsigned char* write_ent(unsigned char*, int),
5126 unsigned char* write_tail(unsigned char*, int))
5128 size_t len = strlen(name);
5129 bool writing = false;
5132 memcpy(sym, name, len);
5135 for (unsigned int i = lo; i <= hi; i++)
5137 sym[len + 0] = i / 10 + '0';
5138 sym[len + 1] = i % 10 + '0';
5139 Symbol* gsym = symtab->lookup(sym);
5140 bool refd = gsym != NULL && gsym->is_undefined();
5141 writing = writing || refd;
5144 if (this->contents_ == NULL)
5145 this->contents_ = new unsigned char[this->savres_max];
5147 section_size_type value = this->current_data_size();
5148 unsigned char* p = this->contents_ + value;
5150 p = write_ent(p, i);
5152 p = write_tail(p, i);
5153 section_size_type cur_size = p - this->contents_;
5154 this->set_current_data_size(cur_size);
5156 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
5157 this, value, cur_size - value,
5158 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
5159 elfcpp::STV_HIDDEN, 0, false, false);
5164 // Write out save/restore.
5166 template<int size, bool big_endian>
5168 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
5170 const section_size_type off = this->offset();
5171 const section_size_type oview_size =
5172 convert_to_section_size_type(this->data_size());
5173 unsigned char* const oview = of->get_output_view(off, oview_size);
5174 memcpy(oview, this->contents_, oview_size);
5175 of->write_output_view(off, oview_size, oview);
5179 // Create the glink section.
5181 template<int size, bool big_endian>
5183 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
5185 if (this->glink_ == NULL)
5187 this->glink_ = new Output_data_glink<size, big_endian>(this);
5188 this->glink_->add_eh_frame(layout);
5189 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5190 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5191 this->glink_, ORDER_TEXT, false);
5195 // Create a PLT entry for a global symbol.
5197 template<int size, bool big_endian>
5199 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
5203 if (gsym->type() == elfcpp::STT_GNU_IFUNC
5204 && gsym->can_use_relative_reloc(false))
5206 if (this->iplt_ == NULL)
5207 this->make_iplt_section(symtab, layout);
5208 this->iplt_->add_ifunc_entry(gsym);
5212 if (this->plt_ == NULL)
5213 this->make_plt_section(symtab, layout);
5214 this->plt_->add_entry(gsym);
5218 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5220 template<int size, bool big_endian>
5222 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
5223 Symbol_table* symtab,
5225 Sized_relobj_file<size, big_endian>* relobj,
5228 if (this->iplt_ == NULL)
5229 this->make_iplt_section(symtab, layout);
5230 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
5233 // Return the number of entries in the PLT.
5235 template<int size, bool big_endian>
5237 Target_powerpc<size, big_endian>::plt_entry_count() const
5239 if (this->plt_ == NULL)
5241 return this->plt_->entry_count();
5244 // Create a GOT entry for local dynamic __tls_get_addr calls.
5246 template<int size, bool big_endian>
5248 Target_powerpc<size, big_endian>::tlsld_got_offset(
5249 Symbol_table* symtab,
5251 Sized_relobj_file<size, big_endian>* object)
5253 if (this->tlsld_got_offset_ == -1U)
5255 gold_assert(symtab != NULL && layout != NULL && object != NULL);
5256 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
5257 Output_data_got_powerpc<size, big_endian>* got
5258 = this->got_section(symtab, layout);
5259 unsigned int got_offset = got->add_constant_pair(0, 0);
5260 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
5262 this->tlsld_got_offset_ = got_offset;
5264 return this->tlsld_got_offset_;
5267 // Get the Reference_flags for a particular relocation.
5269 template<int size, bool big_endian>
5271 Target_powerpc<size, big_endian>::Scan::get_reference_flags(
5272 unsigned int r_type,
5273 const Target_powerpc* target)
5279 case elfcpp::R_POWERPC_NONE:
5280 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5281 case elfcpp::R_POWERPC_GNU_VTENTRY:
5282 case elfcpp::R_PPC64_TOC:
5283 // No symbol reference.
5286 case elfcpp::R_PPC64_ADDR64:
5287 case elfcpp::R_PPC64_UADDR64:
5288 case elfcpp::R_POWERPC_ADDR32:
5289 case elfcpp::R_POWERPC_UADDR32:
5290 case elfcpp::R_POWERPC_ADDR16:
5291 case elfcpp::R_POWERPC_UADDR16:
5292 case elfcpp::R_POWERPC_ADDR16_LO:
5293 case elfcpp::R_POWERPC_ADDR16_HI:
5294 case elfcpp::R_POWERPC_ADDR16_HA:
5295 ref = Symbol::ABSOLUTE_REF;
5298 case elfcpp::R_POWERPC_ADDR24:
5299 case elfcpp::R_POWERPC_ADDR14:
5300 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5301 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5302 ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
5305 case elfcpp::R_PPC64_REL64:
5306 case elfcpp::R_POWERPC_REL32:
5307 case elfcpp::R_PPC_LOCAL24PC:
5308 case elfcpp::R_POWERPC_REL16:
5309 case elfcpp::R_POWERPC_REL16_LO:
5310 case elfcpp::R_POWERPC_REL16_HI:
5311 case elfcpp::R_POWERPC_REL16_HA:
5312 ref = Symbol::RELATIVE_REF;
5315 case elfcpp::R_POWERPC_REL24:
5316 case elfcpp::R_PPC_PLTREL24:
5317 case elfcpp::R_POWERPC_REL14:
5318 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5319 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5320 ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
5323 case elfcpp::R_POWERPC_GOT16:
5324 case elfcpp::R_POWERPC_GOT16_LO:
5325 case elfcpp::R_POWERPC_GOT16_HI:
5326 case elfcpp::R_POWERPC_GOT16_HA:
5327 case elfcpp::R_PPC64_GOT16_DS:
5328 case elfcpp::R_PPC64_GOT16_LO_DS:
5329 case elfcpp::R_PPC64_TOC16:
5330 case elfcpp::R_PPC64_TOC16_LO:
5331 case elfcpp::R_PPC64_TOC16_HI:
5332 case elfcpp::R_PPC64_TOC16_HA:
5333 case elfcpp::R_PPC64_TOC16_DS:
5334 case elfcpp::R_PPC64_TOC16_LO_DS:
5335 ref = Symbol::RELATIVE_REF;
5338 case elfcpp::R_POWERPC_GOT_TPREL16:
5339 case elfcpp::R_POWERPC_TLS:
5340 ref = Symbol::TLS_REF;
5343 case elfcpp::R_POWERPC_COPY:
5344 case elfcpp::R_POWERPC_GLOB_DAT:
5345 case elfcpp::R_POWERPC_JMP_SLOT:
5346 case elfcpp::R_POWERPC_RELATIVE:
5347 case elfcpp::R_POWERPC_DTPMOD:
5349 // Not expected. We will give an error later.
5353 if (size == 64 && target->abiversion() < 2)
5354 ref |= Symbol::FUNC_DESC_ABI;
5358 // Report an unsupported relocation against a local symbol.
5360 template<int size, bool big_endian>
5362 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
5363 Sized_relobj_file<size, big_endian>* object,
5364 unsigned int r_type)
5366 gold_error(_("%s: unsupported reloc %u against local symbol"),
5367 object->name().c_str(), r_type);
5370 // We are about to emit a dynamic relocation of type R_TYPE. If the
5371 // dynamic linker does not support it, issue an error.
5373 template<int size, bool big_endian>
5375 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
5376 unsigned int r_type)
5378 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
5380 // These are the relocation types supported by glibc for both 32-bit
5381 // and 64-bit powerpc.
5384 case elfcpp::R_POWERPC_NONE:
5385 case elfcpp::R_POWERPC_RELATIVE:
5386 case elfcpp::R_POWERPC_GLOB_DAT:
5387 case elfcpp::R_POWERPC_DTPMOD:
5388 case elfcpp::R_POWERPC_DTPREL:
5389 case elfcpp::R_POWERPC_TPREL:
5390 case elfcpp::R_POWERPC_JMP_SLOT:
5391 case elfcpp::R_POWERPC_COPY:
5392 case elfcpp::R_POWERPC_IRELATIVE:
5393 case elfcpp::R_POWERPC_ADDR32:
5394 case elfcpp::R_POWERPC_UADDR32:
5395 case elfcpp::R_POWERPC_ADDR24:
5396 case elfcpp::R_POWERPC_ADDR16:
5397 case elfcpp::R_POWERPC_UADDR16:
5398 case elfcpp::R_POWERPC_ADDR16_LO:
5399 case elfcpp::R_POWERPC_ADDR16_HI:
5400 case elfcpp::R_POWERPC_ADDR16_HA:
5401 case elfcpp::R_POWERPC_ADDR14:
5402 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5403 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5404 case elfcpp::R_POWERPC_REL32:
5405 case elfcpp::R_POWERPC_REL24:
5406 case elfcpp::R_POWERPC_TPREL16:
5407 case elfcpp::R_POWERPC_TPREL16_LO:
5408 case elfcpp::R_POWERPC_TPREL16_HI:
5409 case elfcpp::R_POWERPC_TPREL16_HA:
5420 // These are the relocation types supported only on 64-bit.
5421 case elfcpp::R_PPC64_ADDR64:
5422 case elfcpp::R_PPC64_UADDR64:
5423 case elfcpp::R_PPC64_JMP_IREL:
5424 case elfcpp::R_PPC64_ADDR16_DS:
5425 case elfcpp::R_PPC64_ADDR16_LO_DS:
5426 case elfcpp::R_PPC64_ADDR16_HIGH:
5427 case elfcpp::R_PPC64_ADDR16_HIGHA:
5428 case elfcpp::R_PPC64_ADDR16_HIGHER:
5429 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5430 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5431 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5432 case elfcpp::R_PPC64_REL64:
5433 case elfcpp::R_POWERPC_ADDR30:
5434 case elfcpp::R_PPC64_TPREL16_DS:
5435 case elfcpp::R_PPC64_TPREL16_LO_DS:
5436 case elfcpp::R_PPC64_TPREL16_HIGH:
5437 case elfcpp::R_PPC64_TPREL16_HIGHA:
5438 case elfcpp::R_PPC64_TPREL16_HIGHER:
5439 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5440 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5441 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5452 // These are the relocation types supported only on 32-bit.
5453 // ??? glibc ld.so doesn't need to support these.
5454 case elfcpp::R_POWERPC_DTPREL16:
5455 case elfcpp::R_POWERPC_DTPREL16_LO:
5456 case elfcpp::R_POWERPC_DTPREL16_HI:
5457 case elfcpp::R_POWERPC_DTPREL16_HA:
5465 // This prevents us from issuing more than one error per reloc
5466 // section. But we can still wind up issuing more than one
5467 // error per object file.
5468 if (this->issued_non_pic_error_)
5470 gold_assert(parameters->options().output_is_position_independent());
5471 object->error(_("requires unsupported dynamic reloc; "
5472 "recompile with -fPIC"));
5473 this->issued_non_pic_error_ = true;
5477 // Return whether we need to make a PLT entry for a relocation of the
5478 // given type against a STT_GNU_IFUNC symbol.
5480 template<int size, bool big_endian>
5482 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
5483 Target_powerpc<size, big_endian>* target,
5484 Sized_relobj_file<size, big_endian>* object,
5485 unsigned int r_type,
5488 // In non-pic code any reference will resolve to the plt call stub
5489 // for the ifunc symbol.
5490 if ((size == 32 || target->abiversion() >= 2)
5491 && !parameters->options().output_is_position_independent())
5496 // Word size refs from data sections are OK, but don't need a PLT entry.
5497 case elfcpp::R_POWERPC_ADDR32:
5498 case elfcpp::R_POWERPC_UADDR32:
5503 case elfcpp::R_PPC64_ADDR64:
5504 case elfcpp::R_PPC64_UADDR64:
5509 // GOT refs are good, but also don't need a PLT entry.
5510 case elfcpp::R_POWERPC_GOT16:
5511 case elfcpp::R_POWERPC_GOT16_LO:
5512 case elfcpp::R_POWERPC_GOT16_HI:
5513 case elfcpp::R_POWERPC_GOT16_HA:
5514 case elfcpp::R_PPC64_GOT16_DS:
5515 case elfcpp::R_PPC64_GOT16_LO_DS:
5518 // Function calls are good, and these do need a PLT entry.
5519 case elfcpp::R_POWERPC_ADDR24:
5520 case elfcpp::R_POWERPC_ADDR14:
5521 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5522 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5523 case elfcpp::R_POWERPC_REL24:
5524 case elfcpp::R_PPC_PLTREL24:
5525 case elfcpp::R_POWERPC_REL14:
5526 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5527 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5534 // Anything else is a problem.
5535 // If we are building a static executable, the libc startup function
5536 // responsible for applying indirect function relocations is going
5537 // to complain about the reloc type.
5538 // If we are building a dynamic executable, we will have a text
5539 // relocation. The dynamic loader will set the text segment
5540 // writable and non-executable to apply text relocations. So we'll
5541 // segfault when trying to run the indirection function to resolve
5544 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5545 object->name().c_str(), r_type);
5549 // Scan a relocation for a local symbol.
5551 template<int size, bool big_endian>
5553 Target_powerpc<size, big_endian>::Scan::local(
5554 Symbol_table* symtab,
5556 Target_powerpc<size, big_endian>* target,
5557 Sized_relobj_file<size, big_endian>* object,
5558 unsigned int data_shndx,
5559 Output_section* output_section,
5560 const elfcpp::Rela<size, big_endian>& reloc,
5561 unsigned int r_type,
5562 const elfcpp::Sym<size, big_endian>& lsym,
5565 this->maybe_skip_tls_get_addr_call(r_type, NULL);
5567 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5568 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5570 this->expect_tls_get_addr_call();
5571 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5572 if (tls_type != tls::TLSOPT_NONE)
5573 this->skip_next_tls_get_addr_call();
5575 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5576 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5578 this->expect_tls_get_addr_call();
5579 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5580 if (tls_type != tls::TLSOPT_NONE)
5581 this->skip_next_tls_get_addr_call();
5584 Powerpc_relobj<size, big_endian>* ppc_object
5585 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5590 && data_shndx == ppc_object->opd_shndx()
5591 && r_type == elfcpp::R_PPC64_ADDR64)
5592 ppc_object->set_opd_discard(reloc.get_r_offset());
5596 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5597 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
5598 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5600 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5601 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5602 r_type, r_sym, reloc.get_r_addend());
5603 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
5608 case elfcpp::R_POWERPC_NONE:
5609 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5610 case elfcpp::R_POWERPC_GNU_VTENTRY:
5611 case elfcpp::R_PPC64_TOCSAVE:
5612 case elfcpp::R_POWERPC_TLS:
5613 case elfcpp::R_PPC64_ENTRY:
5616 case elfcpp::R_PPC64_TOC:
5618 Output_data_got_powerpc<size, big_endian>* got
5619 = target->got_section(symtab, layout);
5620 if (parameters->options().output_is_position_independent())
5622 Address off = reloc.get_r_offset();
5624 && target->abiversion() < 2
5625 && data_shndx == ppc_object->opd_shndx()
5626 && ppc_object->get_opd_discard(off - 8))
5629 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5630 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5631 rela_dyn->add_output_section_relative(got->output_section(),
5632 elfcpp::R_POWERPC_RELATIVE,
5634 object, data_shndx, off,
5635 symobj->toc_base_offset());
5640 case elfcpp::R_PPC64_ADDR64:
5641 case elfcpp::R_PPC64_UADDR64:
5642 case elfcpp::R_POWERPC_ADDR32:
5643 case elfcpp::R_POWERPC_UADDR32:
5644 case elfcpp::R_POWERPC_ADDR24:
5645 case elfcpp::R_POWERPC_ADDR16:
5646 case elfcpp::R_POWERPC_ADDR16_LO:
5647 case elfcpp::R_POWERPC_ADDR16_HI:
5648 case elfcpp::R_POWERPC_ADDR16_HA:
5649 case elfcpp::R_POWERPC_UADDR16:
5650 case elfcpp::R_PPC64_ADDR16_HIGH:
5651 case elfcpp::R_PPC64_ADDR16_HIGHA:
5652 case elfcpp::R_PPC64_ADDR16_HIGHER:
5653 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5654 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5655 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5656 case elfcpp::R_PPC64_ADDR16_DS:
5657 case elfcpp::R_PPC64_ADDR16_LO_DS:
5658 case elfcpp::R_POWERPC_ADDR14:
5659 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5660 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5661 // If building a shared library (or a position-independent
5662 // executable), we need to create a dynamic relocation for
5664 if (parameters->options().output_is_position_independent()
5665 || (size == 64 && is_ifunc && target->abiversion() < 2))
5667 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5669 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5670 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
5671 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
5673 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5674 : elfcpp::R_POWERPC_RELATIVE);
5675 rela_dyn->add_local_relative(object, r_sym, dynrel,
5676 output_section, data_shndx,
5677 reloc.get_r_offset(),
5678 reloc.get_r_addend(), false);
5680 else if (lsym.get_st_type() != elfcpp::STT_SECTION)
5682 check_non_pic(object, r_type);
5683 rela_dyn->add_local(object, r_sym, r_type, output_section,
5684 data_shndx, reloc.get_r_offset(),
5685 reloc.get_r_addend());
5689 gold_assert(lsym.get_st_value() == 0);
5690 unsigned int shndx = lsym.get_st_shndx();
5692 shndx = object->adjust_sym_shndx(r_sym, shndx,
5695 object->error(_("section symbol %u has bad shndx %u"),
5698 rela_dyn->add_local_section(object, shndx, r_type,
5699 output_section, data_shndx,
5700 reloc.get_r_offset());
5705 case elfcpp::R_POWERPC_REL24:
5706 case elfcpp::R_PPC_PLTREL24:
5707 case elfcpp::R_PPC_LOCAL24PC:
5708 case elfcpp::R_POWERPC_REL14:
5709 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5710 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5712 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5713 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5714 reloc.get_r_addend());
5717 case elfcpp::R_PPC64_REL64:
5718 case elfcpp::R_POWERPC_REL32:
5719 case elfcpp::R_POWERPC_REL16:
5720 case elfcpp::R_POWERPC_REL16_LO:
5721 case elfcpp::R_POWERPC_REL16_HI:
5722 case elfcpp::R_POWERPC_REL16_HA:
5723 case elfcpp::R_POWERPC_REL16DX_HA:
5724 case elfcpp::R_POWERPC_SECTOFF:
5725 case elfcpp::R_POWERPC_SECTOFF_LO:
5726 case elfcpp::R_POWERPC_SECTOFF_HI:
5727 case elfcpp::R_POWERPC_SECTOFF_HA:
5728 case elfcpp::R_PPC64_SECTOFF_DS:
5729 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5730 case elfcpp::R_POWERPC_TPREL16:
5731 case elfcpp::R_POWERPC_TPREL16_LO:
5732 case elfcpp::R_POWERPC_TPREL16_HI:
5733 case elfcpp::R_POWERPC_TPREL16_HA:
5734 case elfcpp::R_PPC64_TPREL16_DS:
5735 case elfcpp::R_PPC64_TPREL16_LO_DS:
5736 case elfcpp::R_PPC64_TPREL16_HIGH:
5737 case elfcpp::R_PPC64_TPREL16_HIGHA:
5738 case elfcpp::R_PPC64_TPREL16_HIGHER:
5739 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5740 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5741 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5742 case elfcpp::R_POWERPC_DTPREL16:
5743 case elfcpp::R_POWERPC_DTPREL16_LO:
5744 case elfcpp::R_POWERPC_DTPREL16_HI:
5745 case elfcpp::R_POWERPC_DTPREL16_HA:
5746 case elfcpp::R_PPC64_DTPREL16_DS:
5747 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5748 case elfcpp::R_PPC64_DTPREL16_HIGH:
5749 case elfcpp::R_PPC64_DTPREL16_HIGHA:
5750 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5751 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5752 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5753 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5754 case elfcpp::R_PPC64_TLSGD:
5755 case elfcpp::R_PPC64_TLSLD:
5756 case elfcpp::R_PPC64_ADDR64_LOCAL:
5759 case elfcpp::R_POWERPC_GOT16:
5760 case elfcpp::R_POWERPC_GOT16_LO:
5761 case elfcpp::R_POWERPC_GOT16_HI:
5762 case elfcpp::R_POWERPC_GOT16_HA:
5763 case elfcpp::R_PPC64_GOT16_DS:
5764 case elfcpp::R_PPC64_GOT16_LO_DS:
5766 // The symbol requires a GOT entry.
5767 Output_data_got_powerpc<size, big_endian>* got
5768 = target->got_section(symtab, layout);
5769 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5771 if (!parameters->options().output_is_position_independent())
5774 && (size == 32 || target->abiversion() >= 2))
5775 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
5777 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
5779 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
5781 // If we are generating a shared object or a pie, this
5782 // symbol's GOT entry will be set by a dynamic relocation.
5784 off = got->add_constant(0);
5785 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
5787 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5789 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5790 : elfcpp::R_POWERPC_RELATIVE);
5791 rela_dyn->add_local_relative(object, r_sym, dynrel,
5792 got, off, 0, false);
5797 case elfcpp::R_PPC64_TOC16:
5798 case elfcpp::R_PPC64_TOC16_LO:
5799 case elfcpp::R_PPC64_TOC16_HI:
5800 case elfcpp::R_PPC64_TOC16_HA:
5801 case elfcpp::R_PPC64_TOC16_DS:
5802 case elfcpp::R_PPC64_TOC16_LO_DS:
5803 // We need a GOT section.
5804 target->got_section(symtab, layout);
5807 case elfcpp::R_POWERPC_GOT_TLSGD16:
5808 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5809 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5810 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5812 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5813 if (tls_type == tls::TLSOPT_NONE)
5815 Output_data_got_powerpc<size, big_endian>* got
5816 = target->got_section(symtab, layout);
5817 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5818 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5819 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
5820 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
5822 else if (tls_type == tls::TLSOPT_TO_LE)
5824 // no GOT relocs needed for Local Exec.
5831 case elfcpp::R_POWERPC_GOT_TLSLD16:
5832 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5833 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5834 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5836 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5837 if (tls_type == tls::TLSOPT_NONE)
5838 target->tlsld_got_offset(symtab, layout, object);
5839 else if (tls_type == tls::TLSOPT_TO_LE)
5841 // no GOT relocs needed for Local Exec.
5842 if (parameters->options().emit_relocs())
5844 Output_section* os = layout->tls_segment()->first_section();
5845 gold_assert(os != NULL);
5846 os->set_needs_symtab_index();
5854 case elfcpp::R_POWERPC_GOT_DTPREL16:
5855 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5856 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5857 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5859 Output_data_got_powerpc<size, big_endian>* got
5860 = target->got_section(symtab, layout);
5861 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5862 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
5866 case elfcpp::R_POWERPC_GOT_TPREL16:
5867 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5868 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5869 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5871 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
5872 if (tls_type == tls::TLSOPT_NONE)
5874 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5875 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
5877 Output_data_got_powerpc<size, big_endian>* got
5878 = target->got_section(symtab, layout);
5879 unsigned int off = got->add_constant(0);
5880 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
5882 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5883 rela_dyn->add_symbolless_local_addend(object, r_sym,
5884 elfcpp::R_POWERPC_TPREL,
5888 else if (tls_type == tls::TLSOPT_TO_LE)
5890 // no GOT relocs needed for Local Exec.
5898 unsupported_reloc_local(object, r_type);
5904 case elfcpp::R_POWERPC_GOT_TLSLD16:
5905 case elfcpp::R_POWERPC_GOT_TLSGD16:
5906 case elfcpp::R_POWERPC_GOT_TPREL16:
5907 case elfcpp::R_POWERPC_GOT_DTPREL16:
5908 case elfcpp::R_POWERPC_GOT16:
5909 case elfcpp::R_PPC64_GOT16_DS:
5910 case elfcpp::R_PPC64_TOC16:
5911 case elfcpp::R_PPC64_TOC16_DS:
5912 ppc_object->set_has_small_toc_reloc();
5918 // Report an unsupported relocation against a global symbol.
5920 template<int size, bool big_endian>
5922 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
5923 Sized_relobj_file<size, big_endian>* object,
5924 unsigned int r_type,
5927 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5928 object->name().c_str(), r_type, gsym->demangled_name().c_str());
5931 // Scan a relocation for a global symbol.
5933 template<int size, bool big_endian>
5935 Target_powerpc<size, big_endian>::Scan::global(
5936 Symbol_table* symtab,
5938 Target_powerpc<size, big_endian>* target,
5939 Sized_relobj_file<size, big_endian>* object,
5940 unsigned int data_shndx,
5941 Output_section* output_section,
5942 const elfcpp::Rela<size, big_endian>& reloc,
5943 unsigned int r_type,
5946 if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP)
5949 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5950 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5952 this->expect_tls_get_addr_call();
5953 const bool final = gsym->final_value_is_known();
5954 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5955 if (tls_type != tls::TLSOPT_NONE)
5956 this->skip_next_tls_get_addr_call();
5958 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5959 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5961 this->expect_tls_get_addr_call();
5962 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5963 if (tls_type != tls::TLSOPT_NONE)
5964 this->skip_next_tls_get_addr_call();
5967 Powerpc_relobj<size, big_endian>* ppc_object
5968 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5970 // A STT_GNU_IFUNC symbol may require a PLT entry.
5971 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
5972 bool pushed_ifunc = false;
5973 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5975 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5976 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5977 reloc.get_r_addend());
5978 target->make_plt_entry(symtab, layout, gsym);
5979 pushed_ifunc = true;
5984 case elfcpp::R_POWERPC_NONE:
5985 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5986 case elfcpp::R_POWERPC_GNU_VTENTRY:
5987 case elfcpp::R_PPC_LOCAL24PC:
5988 case elfcpp::R_POWERPC_TLS:
5989 case elfcpp::R_PPC64_ENTRY:
5992 case elfcpp::R_PPC64_TOC:
5994 Output_data_got_powerpc<size, big_endian>* got
5995 = target->got_section(symtab, layout);
5996 if (parameters->options().output_is_position_independent())
5998 Address off = reloc.get_r_offset();
6000 && data_shndx == ppc_object->opd_shndx()
6001 && ppc_object->get_opd_discard(off - 8))
6004 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6005 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
6006 if (data_shndx != ppc_object->opd_shndx())
6007 symobj = static_cast
6008 <Powerpc_relobj<size, big_endian>*>(gsym->object());
6009 rela_dyn->add_output_section_relative(got->output_section(),
6010 elfcpp::R_POWERPC_RELATIVE,
6012 object, data_shndx, off,
6013 symobj->toc_base_offset());
6018 case elfcpp::R_PPC64_ADDR64:
6020 && target->abiversion() < 2
6021 && data_shndx == ppc_object->opd_shndx()
6022 && (gsym->is_defined_in_discarded_section()
6023 || gsym->object() != object))
6025 ppc_object->set_opd_discard(reloc.get_r_offset());
6029 case elfcpp::R_PPC64_UADDR64:
6030 case elfcpp::R_POWERPC_ADDR32:
6031 case elfcpp::R_POWERPC_UADDR32:
6032 case elfcpp::R_POWERPC_ADDR24:
6033 case elfcpp::R_POWERPC_ADDR16:
6034 case elfcpp::R_POWERPC_ADDR16_LO:
6035 case elfcpp::R_POWERPC_ADDR16_HI:
6036 case elfcpp::R_POWERPC_ADDR16_HA:
6037 case elfcpp::R_POWERPC_UADDR16:
6038 case elfcpp::R_PPC64_ADDR16_HIGH:
6039 case elfcpp::R_PPC64_ADDR16_HIGHA:
6040 case elfcpp::R_PPC64_ADDR16_HIGHER:
6041 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6042 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6043 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6044 case elfcpp::R_PPC64_ADDR16_DS:
6045 case elfcpp::R_PPC64_ADDR16_LO_DS:
6046 case elfcpp::R_POWERPC_ADDR14:
6047 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6048 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6050 // Make a PLT entry if necessary.
6051 if (gsym->needs_plt_entry())
6053 // Since this is not a PC-relative relocation, we may be
6054 // taking the address of a function. In that case we need to
6055 // set the entry in the dynamic symbol table to the address of
6056 // the PLT call stub.
6057 bool need_ifunc_plt = false;
6058 if ((size == 32 || target->abiversion() >= 2)
6059 && gsym->is_from_dynobj()
6060 && !parameters->options().output_is_position_independent())
6062 gsym->set_needs_dynsym_value();
6063 need_ifunc_plt = true;
6065 if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt))
6067 target->push_branch(ppc_object, data_shndx,
6068 reloc.get_r_offset(), r_type,
6069 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6070 reloc.get_r_addend());
6071 target->make_plt_entry(symtab, layout, gsym);
6074 // Make a dynamic relocation if necessary.
6075 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))
6076 || (size == 64 && is_ifunc && target->abiversion() < 2))
6078 if (!parameters->options().output_is_position_independent()
6079 && gsym->may_need_copy_reloc())
6081 target->copy_reloc(symtab, layout, object,
6082 data_shndx, output_section, gsym, reloc);
6084 else if ((((size == 32
6085 && r_type == elfcpp::R_POWERPC_ADDR32)
6087 && r_type == elfcpp::R_PPC64_ADDR64
6088 && target->abiversion() >= 2))
6089 && gsym->can_use_relative_reloc(false)
6090 && !(gsym->visibility() == elfcpp::STV_PROTECTED
6091 && parameters->options().shared()))
6093 && r_type == elfcpp::R_PPC64_ADDR64
6094 && target->abiversion() < 2
6095 && (gsym->can_use_relative_reloc(false)
6096 || data_shndx == ppc_object->opd_shndx())))
6098 Reloc_section* rela_dyn
6099 = target->rela_dyn_section(symtab, layout, is_ifunc);
6100 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6101 : elfcpp::R_POWERPC_RELATIVE);
6102 rela_dyn->add_symbolless_global_addend(
6103 gsym, dynrel, output_section, object, data_shndx,
6104 reloc.get_r_offset(), reloc.get_r_addend());
6108 Reloc_section* rela_dyn
6109 = target->rela_dyn_section(symtab, layout, is_ifunc);
6110 check_non_pic(object, r_type);
6111 rela_dyn->add_global(gsym, r_type, output_section,
6113 reloc.get_r_offset(),
6114 reloc.get_r_addend());
6120 case elfcpp::R_PPC_PLTREL24:
6121 case elfcpp::R_POWERPC_REL24:
6124 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6126 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6127 reloc.get_r_addend());
6128 if (gsym->needs_plt_entry()
6129 || (!gsym->final_value_is_known()
6130 && (gsym->is_undefined()
6131 || gsym->is_from_dynobj()
6132 || gsym->is_preemptible())))
6133 target->make_plt_entry(symtab, layout, gsym);
6137 case elfcpp::R_PPC64_REL64:
6138 case elfcpp::R_POWERPC_REL32:
6139 // Make a dynamic relocation if necessary.
6140 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)))
6142 if (!parameters->options().output_is_position_independent()
6143 && gsym->may_need_copy_reloc())
6145 target->copy_reloc(symtab, layout, object,
6146 data_shndx, output_section, gsym,
6151 Reloc_section* rela_dyn
6152 = target->rela_dyn_section(symtab, layout, is_ifunc);
6153 check_non_pic(object, r_type);
6154 rela_dyn->add_global(gsym, r_type, output_section, object,
6155 data_shndx, reloc.get_r_offset(),
6156 reloc.get_r_addend());
6161 case elfcpp::R_POWERPC_REL14:
6162 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6163 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6165 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6166 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6167 reloc.get_r_addend());
6170 case elfcpp::R_POWERPC_REL16:
6171 case elfcpp::R_POWERPC_REL16_LO:
6172 case elfcpp::R_POWERPC_REL16_HI:
6173 case elfcpp::R_POWERPC_REL16_HA:
6174 case elfcpp::R_POWERPC_REL16DX_HA:
6175 case elfcpp::R_POWERPC_SECTOFF:
6176 case elfcpp::R_POWERPC_SECTOFF_LO:
6177 case elfcpp::R_POWERPC_SECTOFF_HI:
6178 case elfcpp::R_POWERPC_SECTOFF_HA:
6179 case elfcpp::R_PPC64_SECTOFF_DS:
6180 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6181 case elfcpp::R_POWERPC_TPREL16:
6182 case elfcpp::R_POWERPC_TPREL16_LO:
6183 case elfcpp::R_POWERPC_TPREL16_HI:
6184 case elfcpp::R_POWERPC_TPREL16_HA:
6185 case elfcpp::R_PPC64_TPREL16_DS:
6186 case elfcpp::R_PPC64_TPREL16_LO_DS:
6187 case elfcpp::R_PPC64_TPREL16_HIGH:
6188 case elfcpp::R_PPC64_TPREL16_HIGHA:
6189 case elfcpp::R_PPC64_TPREL16_HIGHER:
6190 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6191 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6192 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6193 case elfcpp::R_POWERPC_DTPREL16:
6194 case elfcpp::R_POWERPC_DTPREL16_LO:
6195 case elfcpp::R_POWERPC_DTPREL16_HI:
6196 case elfcpp::R_POWERPC_DTPREL16_HA:
6197 case elfcpp::R_PPC64_DTPREL16_DS:
6198 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6199 case elfcpp::R_PPC64_DTPREL16_HIGH:
6200 case elfcpp::R_PPC64_DTPREL16_HIGHA:
6201 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6202 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6203 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6204 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6205 case elfcpp::R_PPC64_TLSGD:
6206 case elfcpp::R_PPC64_TLSLD:
6207 case elfcpp::R_PPC64_ADDR64_LOCAL:
6210 case elfcpp::R_POWERPC_GOT16:
6211 case elfcpp::R_POWERPC_GOT16_LO:
6212 case elfcpp::R_POWERPC_GOT16_HI:
6213 case elfcpp::R_POWERPC_GOT16_HA:
6214 case elfcpp::R_PPC64_GOT16_DS:
6215 case elfcpp::R_PPC64_GOT16_LO_DS:
6217 // The symbol requires a GOT entry.
6218 Output_data_got_powerpc<size, big_endian>* got;
6220 got = target->got_section(symtab, layout);
6221 if (gsym->final_value_is_known())
6224 && (size == 32 || target->abiversion() >= 2))
6225 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
6227 got->add_global(gsym, GOT_TYPE_STANDARD);
6229 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
6231 // If we are generating a shared object or a pie, this
6232 // symbol's GOT entry will be set by a dynamic relocation.
6233 unsigned int off = got->add_constant(0);
6234 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
6236 Reloc_section* rela_dyn
6237 = target->rela_dyn_section(symtab, layout, is_ifunc);
6239 if (gsym->can_use_relative_reloc(false)
6241 || target->abiversion() >= 2)
6242 && gsym->visibility() == elfcpp::STV_PROTECTED
6243 && parameters->options().shared()))
6245 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6246 : elfcpp::R_POWERPC_RELATIVE);
6247 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
6251 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
6252 rela_dyn->add_global(gsym, dynrel, got, off, 0);
6258 case elfcpp::R_PPC64_TOC16:
6259 case elfcpp::R_PPC64_TOC16_LO:
6260 case elfcpp::R_PPC64_TOC16_HI:
6261 case elfcpp::R_PPC64_TOC16_HA:
6262 case elfcpp::R_PPC64_TOC16_DS:
6263 case elfcpp::R_PPC64_TOC16_LO_DS:
6264 // We need a GOT section.
6265 target->got_section(symtab, layout);
6268 case elfcpp::R_POWERPC_GOT_TLSGD16:
6269 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6270 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6271 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6273 const bool final = gsym->final_value_is_known();
6274 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6275 if (tls_type == tls::TLSOPT_NONE)
6277 Output_data_got_powerpc<size, big_endian>* got
6278 = target->got_section(symtab, layout);
6279 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6280 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn,
6281 elfcpp::R_POWERPC_DTPMOD,
6282 elfcpp::R_POWERPC_DTPREL);
6284 else if (tls_type == tls::TLSOPT_TO_IE)
6286 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6288 Output_data_got_powerpc<size, big_endian>* got
6289 = target->got_section(symtab, layout);
6290 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6291 if (gsym->is_undefined()
6292 || gsym->is_from_dynobj())
6294 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6295 elfcpp::R_POWERPC_TPREL);
6299 unsigned int off = got->add_constant(0);
6300 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6301 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6302 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6307 else if (tls_type == tls::TLSOPT_TO_LE)
6309 // no GOT relocs needed for Local Exec.
6316 case elfcpp::R_POWERPC_GOT_TLSLD16:
6317 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6318 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6319 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6321 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6322 if (tls_type == tls::TLSOPT_NONE)
6323 target->tlsld_got_offset(symtab, layout, object);
6324 else if (tls_type == tls::TLSOPT_TO_LE)
6326 // no GOT relocs needed for Local Exec.
6327 if (parameters->options().emit_relocs())
6329 Output_section* os = layout->tls_segment()->first_section();
6330 gold_assert(os != NULL);
6331 os->set_needs_symtab_index();
6339 case elfcpp::R_POWERPC_GOT_DTPREL16:
6340 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6341 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6342 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6344 Output_data_got_powerpc<size, big_endian>* got
6345 = target->got_section(symtab, layout);
6346 if (!gsym->final_value_is_known()
6347 && (gsym->is_from_dynobj()
6348 || gsym->is_undefined()
6349 || gsym->is_preemptible()))
6350 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
6351 target->rela_dyn_section(layout),
6352 elfcpp::R_POWERPC_DTPREL);
6354 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
6358 case elfcpp::R_POWERPC_GOT_TPREL16:
6359 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6360 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6361 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6363 const bool final = gsym->final_value_is_known();
6364 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6365 if (tls_type == tls::TLSOPT_NONE)
6367 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6369 Output_data_got_powerpc<size, big_endian>* got
6370 = target->got_section(symtab, layout);
6371 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6372 if (gsym->is_undefined()
6373 || gsym->is_from_dynobj())
6375 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6376 elfcpp::R_POWERPC_TPREL);
6380 unsigned int off = got->add_constant(0);
6381 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6382 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6383 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6388 else if (tls_type == tls::TLSOPT_TO_LE)
6390 // no GOT relocs needed for Local Exec.
6398 unsupported_reloc_global(object, r_type, gsym);
6404 case elfcpp::R_POWERPC_GOT_TLSLD16:
6405 case elfcpp::R_POWERPC_GOT_TLSGD16:
6406 case elfcpp::R_POWERPC_GOT_TPREL16:
6407 case elfcpp::R_POWERPC_GOT_DTPREL16:
6408 case elfcpp::R_POWERPC_GOT16:
6409 case elfcpp::R_PPC64_GOT16_DS:
6410 case elfcpp::R_PPC64_TOC16:
6411 case elfcpp::R_PPC64_TOC16_DS:
6412 ppc_object->set_has_small_toc_reloc();
6418 // Process relocations for gc.
6420 template<int size, bool big_endian>
6422 Target_powerpc<size, big_endian>::gc_process_relocs(
6423 Symbol_table* symtab,
6425 Sized_relobj_file<size, big_endian>* object,
6426 unsigned int data_shndx,
6428 const unsigned char* prelocs,
6430 Output_section* output_section,
6431 bool needs_special_offset_handling,
6432 size_t local_symbol_count,
6433 const unsigned char* plocal_symbols)
6435 typedef Target_powerpc<size, big_endian> Powerpc;
6436 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6437 Powerpc_relobj<size, big_endian>* ppc_object
6438 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
6440 ppc_object->set_opd_valid();
6441 if (size == 64 && data_shndx == ppc_object->opd_shndx())
6443 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
6444 for (p = ppc_object->access_from_map()->begin();
6445 p != ppc_object->access_from_map()->end();
6448 Address dst_off = p->first;
6449 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6450 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
6451 for (s = p->second.begin(); s != p->second.end(); ++s)
6453 Relobj* src_obj = s->first;
6454 unsigned int src_indx = s->second;
6455 symtab->gc()->add_reference(src_obj, src_indx,
6456 ppc_object, dst_indx);
6460 ppc_object->access_from_map()->clear();
6461 ppc_object->process_gc_mark(symtab);
6462 // Don't look at .opd relocs as .opd will reference everything.
6466 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
6467 typename Target_powerpc::Relocatable_size_for_reloc>(
6476 needs_special_offset_handling,
6481 // Handle target specific gc actions when adding a gc reference from
6482 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6483 // and DST_OFF. For powerpc64, this adds a referenc to the code
6484 // section of a function descriptor.
6486 template<int size, bool big_endian>
6488 Target_powerpc<size, big_endian>::do_gc_add_reference(
6489 Symbol_table* symtab,
6491 unsigned int src_shndx,
6493 unsigned int dst_shndx,
6494 Address dst_off) const
6496 if (size != 64 || dst_obj->is_dynamic())
6499 Powerpc_relobj<size, big_endian>* ppc_object
6500 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
6501 if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
6503 if (ppc_object->opd_valid())
6505 dst_shndx = ppc_object->get_opd_ent(dst_off);
6506 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
6510 // If we haven't run scan_opd_relocs, we must delay
6511 // processing this function descriptor reference.
6512 ppc_object->add_reference(src_obj, src_shndx, dst_off);
6517 // Add any special sections for this symbol to the gc work list.
6518 // For powerpc64, this adds the code section of a function
6521 template<int size, bool big_endian>
6523 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
6524 Symbol_table* symtab,
6529 Powerpc_relobj<size, big_endian>* ppc_object
6530 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
6532 unsigned int shndx = sym->shndx(&is_ordinary);
6533 if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
6535 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
6536 Address dst_off = gsym->value();
6537 if (ppc_object->opd_valid())
6539 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6540 symtab->gc()->worklist().push_back(Section_id(ppc_object,
6544 ppc_object->add_gc_mark(dst_off);
6549 // For a symbol location in .opd, set LOC to the location of the
6552 template<int size, bool big_endian>
6554 Target_powerpc<size, big_endian>::do_function_location(
6555 Symbol_location* loc) const
6557 if (size == 64 && loc->shndx != 0)
6559 if (loc->object->is_dynamic())
6561 Powerpc_dynobj<size, big_endian>* ppc_object
6562 = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
6563 if (loc->shndx == ppc_object->opd_shndx())
6566 Address off = loc->offset - ppc_object->opd_address();
6567 loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
6568 loc->offset = dest_off;
6573 const Powerpc_relobj<size, big_endian>* ppc_object
6574 = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
6575 if (loc->shndx == ppc_object->opd_shndx())
6578 loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
6579 loc->offset = dest_off;
6585 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6586 // compiled with -fsplit-stack. The function calls non-split-stack
6587 // code. Change the function to ensure it has enough stack space to
6588 // call some random function.
6590 template<int size, bool big_endian>
6592 Target_powerpc<size, big_endian>::do_calls_non_split(
6595 section_offset_type fnoffset,
6596 section_size_type fnsize,
6597 unsigned char* view,
6598 section_size_type view_size,
6600 std::string* to) const
6602 // 32-bit not supported.
6606 Target::do_calls_non_split(object, shndx, fnoffset, fnsize,
6607 view, view_size, from, to);
6611 // The function always starts with
6612 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6613 // addis %r12,%r1,-allocate@ha
6614 // addi %r12,%r12,-allocate@l
6616 // but note that the addis or addi may be replaced with a nop
6618 unsigned char *entry = view + fnoffset;
6619 uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry);
6621 if ((insn & 0xffff0000) == addis_2_12)
6623 /* Skip ELFv2 global entry code. */
6625 insn = elfcpp::Swap<32, big_endian>::readval(entry);
6628 unsigned char *pinsn = entry;
6630 const uint32_t ld_private_ss = 0xe80d8fc0;
6631 if (insn == ld_private_ss)
6633 int32_t allocate = 0;
6637 insn = elfcpp::Swap<32, big_endian>::readval(pinsn);
6638 if ((insn & 0xffff0000) == addis_12_1)
6639 allocate += (insn & 0xffff) << 16;
6640 else if ((insn & 0xffff0000) == addi_12_1
6641 || (insn & 0xffff0000) == addi_12_12)
6642 allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000;
6643 else if (insn != nop)
6646 if (insn == cmpld_7_12_0 && pinsn == entry + 12)
6648 int extra = parameters->options().split_stack_adjust_size();
6650 if (allocate >= 0 || extra < 0)
6652 object->error(_("split-stack stack size overflow at "
6653 "section %u offset %0zx"),
6654 shndx, static_cast<size_t>(fnoffset));
6658 insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff);
6659 if (insn != addis_12_1)
6661 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6663 insn = addi_12_12 | (allocate & 0xffff);
6664 if (insn != addi_12_12)
6666 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6672 insn = addi_12_1 | (allocate & 0xffff);
6673 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6676 if (pinsn != entry + 12)
6677 elfcpp::Swap<32, big_endian>::writeval(pinsn, nop);
6685 if (!object->has_no_split_stack())
6686 object->error(_("failed to match split-stack sequence at "
6687 "section %u offset %0zx"),
6688 shndx, static_cast<size_t>(fnoffset));
6692 // Scan relocations for a section.
6694 template<int size, bool big_endian>
6696 Target_powerpc<size, big_endian>::scan_relocs(
6697 Symbol_table* symtab,
6699 Sized_relobj_file<size, big_endian>* object,
6700 unsigned int data_shndx,
6701 unsigned int sh_type,
6702 const unsigned char* prelocs,
6704 Output_section* output_section,
6705 bool needs_special_offset_handling,
6706 size_t local_symbol_count,
6707 const unsigned char* plocal_symbols)
6709 typedef Target_powerpc<size, big_endian> Powerpc;
6710 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6712 if (sh_type == elfcpp::SHT_REL)
6714 gold_error(_("%s: unsupported REL reloc section"),
6715 object->name().c_str());
6719 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
6728 needs_special_offset_handling,
6733 // Functor class for processing the global symbol table.
6734 // Removes symbols defined on discarded opd entries.
6736 template<bool big_endian>
6737 class Global_symbol_visitor_opd
6740 Global_symbol_visitor_opd()
6744 operator()(Sized_symbol<64>* sym)
6746 if (sym->has_symtab_index()
6747 || sym->source() != Symbol::FROM_OBJECT
6748 || !sym->in_real_elf())
6751 if (sym->object()->is_dynamic())
6754 Powerpc_relobj<64, big_endian>* symobj
6755 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
6756 if (symobj->opd_shndx() == 0)
6760 unsigned int shndx = sym->shndx(&is_ordinary);
6761 if (shndx == symobj->opd_shndx()
6762 && symobj->get_opd_discard(sym->value()))
6764 sym->set_undefined();
6765 sym->set_visibility(elfcpp::STV_DEFAULT);
6766 sym->set_is_defined_in_discarded_section();
6767 sym->set_symtab_index(-1U);
6772 template<int size, bool big_endian>
6774 Target_powerpc<size, big_endian>::define_save_restore_funcs(
6776 Symbol_table* symtab)
6780 Output_data_save_res<size, big_endian>* savres
6781 = new Output_data_save_res<size, big_endian>(symtab);
6782 this->savres_section_ = savres;
6783 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
6784 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
6785 savres, ORDER_TEXT, false);
6789 // Sort linker created .got section first (for the header), then input
6790 // sections belonging to files using small model code.
6792 template<bool big_endian>
6793 class Sort_toc_sections
6797 operator()(const Output_section::Input_section& is1,
6798 const Output_section::Input_section& is2) const
6800 if (!is1.is_input_section() && is2.is_input_section())
6803 = (is1.is_input_section()
6804 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
6805 ->has_small_toc_reloc()));
6807 = (is2.is_input_section()
6808 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
6809 ->has_small_toc_reloc()));
6810 return small1 && !small2;
6814 // Finalize the sections.
6816 template<int size, bool big_endian>
6818 Target_powerpc<size, big_endian>::do_finalize_sections(
6820 const Input_objects*,
6821 Symbol_table* symtab)
6823 if (parameters->doing_static_link())
6825 // At least some versions of glibc elf-init.o have a strong
6826 // reference to __rela_iplt marker syms. A weak ref would be
6828 if (this->iplt_ != NULL)
6830 Reloc_section* rel = this->iplt_->rel_plt();
6831 symtab->define_in_output_data("__rela_iplt_start", NULL,
6832 Symbol_table::PREDEFINED, rel, 0, 0,
6833 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6834 elfcpp::STV_HIDDEN, 0, false, true);
6835 symtab->define_in_output_data("__rela_iplt_end", NULL,
6836 Symbol_table::PREDEFINED, rel, 0, 0,
6837 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6838 elfcpp::STV_HIDDEN, 0, true, true);
6842 symtab->define_as_constant("__rela_iplt_start", NULL,
6843 Symbol_table::PREDEFINED, 0, 0,
6844 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6845 elfcpp::STV_HIDDEN, 0, true, false);
6846 symtab->define_as_constant("__rela_iplt_end", NULL,
6847 Symbol_table::PREDEFINED, 0, 0,
6848 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6849 elfcpp::STV_HIDDEN, 0, true, false);
6855 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
6856 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
6858 if (!parameters->options().relocatable())
6860 this->define_save_restore_funcs(layout, symtab);
6862 // Annoyingly, we need to make these sections now whether or
6863 // not we need them. If we delay until do_relax then we
6864 // need to mess with the relaxation machinery checkpointing.
6865 this->got_section(symtab, layout);
6866 this->make_brlt_section(layout);
6868 if (parameters->options().toc_sort())
6870 Output_section* os = this->got_->output_section();
6871 if (os != NULL && os->input_sections().size() > 1)
6872 std::stable_sort(os->input_sections().begin(),
6873 os->input_sections().end(),
6874 Sort_toc_sections<big_endian>());
6879 // Fill in some more dynamic tags.
6880 Output_data_dynamic* odyn = layout->dynamic_data();
6883 const Reloc_section* rel_plt = (this->plt_ == NULL
6885 : this->plt_->rel_plt());
6886 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
6887 this->rela_dyn_, true, size == 32);
6891 if (this->got_ != NULL)
6893 this->got_->finalize_data_size();
6894 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
6895 this->got_, this->got_->g_o_t());
6900 if (this->glink_ != NULL)
6902 this->glink_->finalize_data_size();
6903 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
6905 (this->glink_->pltresolve_size
6911 // Emit any relocs we saved in an attempt to avoid generating COPY
6913 if (this->copy_relocs_.any_saved_relocs())
6914 this->copy_relocs_.emit(this->rela_dyn_section(layout));
6917 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6921 ok_lo_toc_insn(uint32_t insn)
6923 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6924 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6925 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6926 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6927 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6928 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6929 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6930 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6931 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6932 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6933 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6934 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6935 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6936 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6937 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6939 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6940 && ((insn & 3) == 0 || (insn & 3) == 3))
6941 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
6944 // Return the value to use for a branch relocation.
6946 template<int size, bool big_endian>
6948 Target_powerpc<size, big_endian>::symval_for_branch(
6949 const Symbol_table* symtab,
6950 const Sized_symbol<size>* gsym,
6951 Powerpc_relobj<size, big_endian>* object,
6953 unsigned int *dest_shndx)
6955 if (size == 32 || this->abiversion() >= 2)
6959 // If the symbol is defined in an opd section, ie. is a function
6960 // descriptor, use the function descriptor code entry address
6961 Powerpc_relobj<size, big_endian>* symobj = object;
6963 && gsym->source() != Symbol::FROM_OBJECT)
6966 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
6967 unsigned int shndx = symobj->opd_shndx();
6970 Address opd_addr = symobj->get_output_section_offset(shndx);
6971 if (opd_addr == invalid_address)
6973 opd_addr += symobj->output_section_address(shndx);
6974 if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx))
6977 *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off);
6978 if (symtab->is_section_folded(symobj, *dest_shndx))
6981 = symtab->icf()->get_folded_section(symobj, *dest_shndx);
6982 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
6983 *dest_shndx = folded.second;
6985 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
6986 if (sec_addr == invalid_address)
6989 sec_addr += symobj->output_section(*dest_shndx)->address();
6990 *value = sec_addr + sec_off;
6995 // Perform a relocation.
6997 template<int size, bool big_endian>
6999 Target_powerpc<size, big_endian>::Relocate::relocate(
7000 const Relocate_info<size, big_endian>* relinfo,
7001 Target_powerpc* target,
7004 const elfcpp::Rela<size, big_endian>& rela,
7005 unsigned int r_type,
7006 const Sized_symbol<size>* gsym,
7007 const Symbol_value<size>* psymval,
7008 unsigned char* view,
7010 section_size_type view_size)
7015 switch (this->maybe_skip_tls_get_addr_call(r_type, gsym))
7017 case Track_tls::NOT_EXPECTED:
7018 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7019 _("__tls_get_addr call lacks marker reloc"));
7021 case Track_tls::EXPECTED:
7022 // We have already complained.
7024 case Track_tls::SKIP:
7026 case Track_tls::NORMAL:
7030 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
7031 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
7032 Powerpc_relobj<size, big_endian>* const object
7033 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
7035 bool has_stub_value = false;
7036 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7038 ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
7039 : object->local_has_plt_offset(r_sym))
7040 && (!psymval->is_ifunc_symbol()
7041 || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false)))
7045 && target->abiversion() >= 2
7046 && !parameters->options().output_is_position_independent()
7047 && !is_branch_reloc(r_type))
7049 Address off = target->glink_section()->find_global_entry(gsym);
7050 if (off != invalid_address)
7052 value = target->glink_section()->global_entry_address() + off;
7053 has_stub_value = true;
7058 Stub_table<size, big_endian>* stub_table
7059 = object->stub_table(relinfo->data_shndx);
7060 if (stub_table == NULL)
7062 // This is a ref from a data section to an ifunc symbol.
7063 if (target->stub_tables().size() != 0)
7064 stub_table = target->stub_tables()[0];
7066 if (stub_table != NULL)
7070 off = stub_table->find_plt_call_entry(object, gsym, r_type,
7071 rela.get_r_addend());
7073 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
7074 rela.get_r_addend());
7075 if (off != invalid_address)
7077 value = stub_table->stub_address() + off;
7078 has_stub_value = true;
7082 // We don't care too much about bogus debug references to
7083 // non-local functions, but otherwise there had better be a plt
7084 // call stub or global entry stub as appropriate.
7085 gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC));
7088 if (r_type == elfcpp::R_POWERPC_GOT16
7089 || r_type == elfcpp::R_POWERPC_GOT16_LO
7090 || r_type == elfcpp::R_POWERPC_GOT16_HI
7091 || r_type == elfcpp::R_POWERPC_GOT16_HA
7092 || r_type == elfcpp::R_PPC64_GOT16_DS
7093 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
7097 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
7098 value = gsym->got_offset(GOT_TYPE_STANDARD);
7102 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7103 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
7104 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
7106 value -= target->got_section()->got_base_offset(object);
7108 else if (r_type == elfcpp::R_PPC64_TOC)
7110 value = (target->got_section()->output_section()->address()
7111 + object->toc_base_offset());
7113 else if (gsym != NULL
7114 && (r_type == elfcpp::R_POWERPC_REL24
7115 || r_type == elfcpp::R_PPC_PLTREL24)
7120 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
7121 Valtype* wv = reinterpret_cast<Valtype*>(view);
7122 bool can_plt_call = false;
7123 if (rela.get_r_offset() + 8 <= view_size)
7125 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
7126 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
7129 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
7131 elfcpp::Swap<32, big_endian>::
7132 writeval(wv + 1, ld_2_1 + target->stk_toc());
7133 can_plt_call = true;
7138 // If we don't have a branch and link followed by a nop,
7139 // we can't go via the plt because there is no place to
7140 // put a toc restoring instruction.
7141 // Unless we know we won't be returning.
7142 if (strcmp(gsym->name(), "__libc_start_main") == 0)
7143 can_plt_call = true;
7147 // g++ as of 20130507 emits self-calls without a
7148 // following nop. This is arguably wrong since we have
7149 // conflicting information. On the one hand a global
7150 // symbol and on the other a local call sequence, but
7151 // don't error for this special case.
7152 // It isn't possible to cheaply verify we have exactly
7153 // such a call. Allow all calls to the same section.
7155 Address code = value;
7156 if (gsym->source() == Symbol::FROM_OBJECT
7157 && gsym->object() == object)
7159 unsigned int dest_shndx = 0;
7160 if (target->abiversion() < 2)
7162 Address addend = rela.get_r_addend();
7163 code = psymval->value(object, addend);
7164 target->symval_for_branch(relinfo->symtab, gsym, object,
7165 &code, &dest_shndx);
7168 if (dest_shndx == 0)
7169 dest_shndx = gsym->shndx(&is_ordinary);
7170 ok = dest_shndx == relinfo->data_shndx;
7174 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7175 _("call lacks nop, can't restore toc; "
7176 "recompile with -fPIC"));
7182 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7183 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
7184 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
7185 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
7187 // First instruction of a global dynamic sequence, arg setup insn.
7188 const bool final = gsym == NULL || gsym->final_value_is_known();
7189 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7190 enum Got_type got_type = GOT_TYPE_STANDARD;
7191 if (tls_type == tls::TLSOPT_NONE)
7192 got_type = GOT_TYPE_TLSGD;
7193 else if (tls_type == tls::TLSOPT_TO_IE)
7194 got_type = GOT_TYPE_TPREL;
7195 if (got_type != GOT_TYPE_STANDARD)
7199 gold_assert(gsym->has_got_offset(got_type));
7200 value = gsym->got_offset(got_type);
7204 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7205 gold_assert(object->local_has_got_offset(r_sym, got_type));
7206 value = object->local_got_offset(r_sym, got_type);
7208 value -= target->got_section()->got_base_offset(object);
7210 if (tls_type == tls::TLSOPT_TO_IE)
7212 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7213 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7215 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7216 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7217 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
7219 insn |= 32 << 26; // lwz
7221 insn |= 58 << 26; // ld
7222 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7224 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
7225 - elfcpp::R_POWERPC_GOT_TLSGD16);
7227 else if (tls_type == tls::TLSOPT_TO_LE)
7229 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7230 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7232 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7233 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7234 insn &= (1 << 26) - (1 << 21); // extract rt
7239 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7240 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7241 value = psymval->value(object, rela.get_r_addend());
7245 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7247 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7248 r_type = elfcpp::R_POWERPC_NONE;
7252 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7253 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
7254 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
7255 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
7257 // First instruction of a local dynamic sequence, arg setup insn.
7258 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7259 if (tls_type == tls::TLSOPT_NONE)
7261 value = target->tlsld_got_offset();
7262 value -= target->got_section()->got_base_offset(object);
7266 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7267 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7268 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
7270 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7271 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7272 insn &= (1 << 26) - (1 << 21); // extract rt
7277 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7278 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7283 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7285 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7286 r_type = elfcpp::R_POWERPC_NONE;
7290 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
7291 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
7292 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
7293 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
7295 // Accesses relative to a local dynamic sequence address,
7296 // no optimisation here.
7299 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
7300 value = gsym->got_offset(GOT_TYPE_DTPREL);
7304 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7305 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
7306 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
7308 value -= target->got_section()->got_base_offset(object);
7310 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7311 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
7312 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
7313 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
7315 // First instruction of initial exec sequence.
7316 const bool final = gsym == NULL || gsym->final_value_is_known();
7317 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7318 if (tls_type == tls::TLSOPT_NONE)
7322 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
7323 value = gsym->got_offset(GOT_TYPE_TPREL);
7327 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7328 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
7329 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
7331 value -= target->got_section()->got_base_offset(object);
7335 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7336 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7337 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
7339 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7340 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7341 insn &= (1 << 26) - (1 << 21); // extract rt from ld
7346 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7347 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7348 value = psymval->value(object, rela.get_r_addend());
7352 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7354 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7355 r_type = elfcpp::R_POWERPC_NONE;
7359 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
7360 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
7362 // Second instruction of a global dynamic sequence,
7363 // the __tls_get_addr call
7364 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7365 const bool final = gsym == NULL || gsym->final_value_is_known();
7366 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7367 if (tls_type != tls::TLSOPT_NONE)
7369 if (tls_type == tls::TLSOPT_TO_IE)
7371 Insn* iview = reinterpret_cast<Insn*>(view);
7372 Insn insn = add_3_3_13;
7375 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7376 r_type = elfcpp::R_POWERPC_NONE;
7380 Insn* iview = reinterpret_cast<Insn*>(view);
7381 Insn insn = addi_3_3;
7382 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7383 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7384 view += 2 * big_endian;
7385 value = psymval->value(object, rela.get_r_addend());
7387 this->skip_next_tls_get_addr_call();
7390 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
7391 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
7393 // Second instruction of a local dynamic sequence,
7394 // the __tls_get_addr call
7395 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7396 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7397 if (tls_type == tls::TLSOPT_TO_LE)
7399 Insn* iview = reinterpret_cast<Insn*>(view);
7400 Insn insn = addi_3_3;
7401 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7402 this->skip_next_tls_get_addr_call();
7403 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7404 view += 2 * big_endian;
7408 else if (r_type == elfcpp::R_POWERPC_TLS)
7410 // Second instruction of an initial exec sequence
7411 const bool final = gsym == NULL || gsym->final_value_is_known();
7412 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7413 if (tls_type == tls::TLSOPT_TO_LE)
7415 Insn* iview = reinterpret_cast<Insn*>(view);
7416 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7417 unsigned int reg = size == 32 ? 2 : 13;
7418 insn = at_tls_transform(insn, reg);
7419 gold_assert(insn != 0);
7420 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7421 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7422 view += 2 * big_endian;
7423 value = psymval->value(object, rela.get_r_addend());
7426 else if (!has_stub_value)
7429 if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24))
7430 addend = rela.get_r_addend();
7431 value = psymval->value(object, addend);
7432 if (size == 64 && is_branch_reloc(r_type))
7434 if (target->abiversion() >= 2)
7437 value += object->ppc64_local_entry_offset(gsym);
7439 value += object->ppc64_local_entry_offset(r_sym);
7443 unsigned int dest_shndx;
7444 target->symval_for_branch(relinfo->symtab, gsym, object,
7445 &value, &dest_shndx);
7448 Address max_branch_offset = max_branch_delta(r_type);
7449 if (max_branch_offset != 0
7450 && value - address + max_branch_offset >= 2 * max_branch_offset)
7452 Stub_table<size, big_endian>* stub_table
7453 = object->stub_table(relinfo->data_shndx);
7454 if (stub_table != NULL)
7456 Address off = stub_table->find_long_branch_entry(object, value);
7457 if (off != invalid_address)
7459 value = (stub_table->stub_address() + stub_table->plt_size()
7461 has_stub_value = true;
7469 case elfcpp::R_PPC64_REL64:
7470 case elfcpp::R_POWERPC_REL32:
7471 case elfcpp::R_POWERPC_REL24:
7472 case elfcpp::R_PPC_PLTREL24:
7473 case elfcpp::R_PPC_LOCAL24PC:
7474 case elfcpp::R_POWERPC_REL16:
7475 case elfcpp::R_POWERPC_REL16_LO:
7476 case elfcpp::R_POWERPC_REL16_HI:
7477 case elfcpp::R_POWERPC_REL16_HA:
7478 case elfcpp::R_POWERPC_REL16DX_HA:
7479 case elfcpp::R_POWERPC_REL14:
7480 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7481 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7485 case elfcpp::R_PPC64_TOC16:
7486 case elfcpp::R_PPC64_TOC16_LO:
7487 case elfcpp::R_PPC64_TOC16_HI:
7488 case elfcpp::R_PPC64_TOC16_HA:
7489 case elfcpp::R_PPC64_TOC16_DS:
7490 case elfcpp::R_PPC64_TOC16_LO_DS:
7491 // Subtract the TOC base address.
7492 value -= (target->got_section()->output_section()->address()
7493 + object->toc_base_offset());
7496 case elfcpp::R_POWERPC_SECTOFF:
7497 case elfcpp::R_POWERPC_SECTOFF_LO:
7498 case elfcpp::R_POWERPC_SECTOFF_HI:
7499 case elfcpp::R_POWERPC_SECTOFF_HA:
7500 case elfcpp::R_PPC64_SECTOFF_DS:
7501 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7503 value -= os->address();
7506 case elfcpp::R_PPC64_TPREL16_DS:
7507 case elfcpp::R_PPC64_TPREL16_LO_DS:
7508 case elfcpp::R_PPC64_TPREL16_HIGH:
7509 case elfcpp::R_PPC64_TPREL16_HIGHA:
7511 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7513 case elfcpp::R_POWERPC_TPREL16:
7514 case elfcpp::R_POWERPC_TPREL16_LO:
7515 case elfcpp::R_POWERPC_TPREL16_HI:
7516 case elfcpp::R_POWERPC_TPREL16_HA:
7517 case elfcpp::R_POWERPC_TPREL:
7518 case elfcpp::R_PPC64_TPREL16_HIGHER:
7519 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7520 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7521 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7522 // tls symbol values are relative to tls_segment()->vaddr()
7526 case elfcpp::R_PPC64_DTPREL16_DS:
7527 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7528 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7529 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7530 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7531 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7533 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7534 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7536 case elfcpp::R_POWERPC_DTPREL16:
7537 case elfcpp::R_POWERPC_DTPREL16_LO:
7538 case elfcpp::R_POWERPC_DTPREL16_HI:
7539 case elfcpp::R_POWERPC_DTPREL16_HA:
7540 case elfcpp::R_POWERPC_DTPREL:
7541 case elfcpp::R_PPC64_DTPREL16_HIGH:
7542 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7543 // tls symbol values are relative to tls_segment()->vaddr()
7544 value -= dtp_offset;
7547 case elfcpp::R_PPC64_ADDR64_LOCAL:
7549 value += object->ppc64_local_entry_offset(gsym);
7551 value += object->ppc64_local_entry_offset(r_sym);
7558 Insn branch_bit = 0;
7561 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7562 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7563 branch_bit = 1 << 21;
7564 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7565 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7567 Insn* iview = reinterpret_cast<Insn*>(view);
7568 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7571 if (this->is_isa_v2)
7573 // Set 'a' bit. This is 0b00010 in BO field for branch
7574 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7575 // for branch on CTR insns (BO == 1a00t or 1a01t).
7576 if ((insn & (0x14 << 21)) == (0x04 << 21))
7578 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7585 // Invert 'y' bit if not the default.
7586 if (static_cast<Signed_address>(value) < 0)
7589 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7599 // Multi-instruction sequences that access the TOC can be
7600 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7601 // to nop; addi rb,r2,x;
7607 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7608 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7609 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7610 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7611 case elfcpp::R_POWERPC_GOT16_HA:
7612 case elfcpp::R_PPC64_TOC16_HA:
7613 if (parameters->options().toc_optimize())
7615 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7616 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7617 if ((insn & ((0x3f << 26) | 0x1f << 16))
7618 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7619 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7620 _("toc optimization is not supported "
7621 "for %#08x instruction"), insn);
7622 else if (value + 0x8000 < 0x10000)
7624 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
7630 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7631 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7632 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7633 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7634 case elfcpp::R_POWERPC_GOT16_LO:
7635 case elfcpp::R_PPC64_GOT16_LO_DS:
7636 case elfcpp::R_PPC64_TOC16_LO:
7637 case elfcpp::R_PPC64_TOC16_LO_DS:
7638 if (parameters->options().toc_optimize())
7640 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7641 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7642 if (!ok_lo_toc_insn(insn))
7643 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7644 _("toc optimization is not supported "
7645 "for %#08x instruction"), insn);
7646 else if (value + 0x8000 < 0x10000)
7648 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
7650 // Transform addic to addi when we change reg.
7651 insn &= ~((0x3f << 26) | (0x1f << 16));
7652 insn |= (14u << 26) | (2 << 16);
7656 insn &= ~(0x1f << 16);
7659 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7664 case elfcpp::R_PPC64_ENTRY:
7665 value = (target->got_section()->output_section()->address()
7666 + object->toc_base_offset());
7667 if (value + 0x80008000 <= 0xffffffff
7668 && !parameters->options().output_is_position_independent())
7670 Insn* iview = reinterpret_cast<Insn*>(view);
7671 Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
7672 Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
7674 if ((insn1 & ~0xfffc) == ld_2_12
7675 && insn2 == add_2_2_12)
7677 insn1 = lis_2 + ha(value);
7678 elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
7679 insn2 = addi_2_2 + l(value);
7680 elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
7687 if (value + 0x80008000 <= 0xffffffff)
7689 Insn* iview = reinterpret_cast<Insn*>(view);
7690 Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
7691 Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
7693 if ((insn1 & ~0xfffc) == ld_2_12
7694 && insn2 == add_2_2_12)
7696 insn1 = addis_2_12 + ha(value);
7697 elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
7698 insn2 = addi_2_2 + l(value);
7699 elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
7708 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
7709 elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr);
7712 case elfcpp::R_POWERPC_ADDR32:
7713 case elfcpp::R_POWERPC_UADDR32:
7715 overflow = Reloc::CHECK_BITFIELD;
7718 case elfcpp::R_POWERPC_REL32:
7719 case elfcpp::R_POWERPC_REL16DX_HA:
7721 overflow = Reloc::CHECK_SIGNED;
7724 case elfcpp::R_POWERPC_UADDR16:
7725 overflow = Reloc::CHECK_BITFIELD;
7728 case elfcpp::R_POWERPC_ADDR16:
7729 // We really should have three separate relocations,
7730 // one for 16-bit data, one for insns with 16-bit signed fields,
7731 // and one for insns with 16-bit unsigned fields.
7732 overflow = Reloc::CHECK_BITFIELD;
7733 if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
7734 overflow = Reloc::CHECK_LOW_INSN;
7737 case elfcpp::R_POWERPC_ADDR16_HI:
7738 case elfcpp::R_POWERPC_ADDR16_HA:
7739 case elfcpp::R_POWERPC_GOT16_HI:
7740 case elfcpp::R_POWERPC_GOT16_HA:
7741 case elfcpp::R_POWERPC_PLT16_HI:
7742 case elfcpp::R_POWERPC_PLT16_HA:
7743 case elfcpp::R_POWERPC_SECTOFF_HI:
7744 case elfcpp::R_POWERPC_SECTOFF_HA:
7745 case elfcpp::R_PPC64_TOC16_HI:
7746 case elfcpp::R_PPC64_TOC16_HA:
7747 case elfcpp::R_PPC64_PLTGOT16_HI:
7748 case elfcpp::R_PPC64_PLTGOT16_HA:
7749 case elfcpp::R_POWERPC_TPREL16_HI:
7750 case elfcpp::R_POWERPC_TPREL16_HA:
7751 case elfcpp::R_POWERPC_DTPREL16_HI:
7752 case elfcpp::R_POWERPC_DTPREL16_HA:
7753 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7754 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7755 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7756 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7757 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7758 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7759 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7760 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7761 case elfcpp::R_POWERPC_REL16_HI:
7762 case elfcpp::R_POWERPC_REL16_HA:
7764 overflow = Reloc::CHECK_HIGH_INSN;
7767 case elfcpp::R_POWERPC_REL16:
7768 case elfcpp::R_PPC64_TOC16:
7769 case elfcpp::R_POWERPC_GOT16:
7770 case elfcpp::R_POWERPC_SECTOFF:
7771 case elfcpp::R_POWERPC_TPREL16:
7772 case elfcpp::R_POWERPC_DTPREL16:
7773 case elfcpp::R_POWERPC_GOT_TLSGD16:
7774 case elfcpp::R_POWERPC_GOT_TLSLD16:
7775 case elfcpp::R_POWERPC_GOT_TPREL16:
7776 case elfcpp::R_POWERPC_GOT_DTPREL16:
7777 overflow = Reloc::CHECK_LOW_INSN;
7780 case elfcpp::R_POWERPC_ADDR24:
7781 case elfcpp::R_POWERPC_ADDR14:
7782 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7783 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7784 case elfcpp::R_PPC64_ADDR16_DS:
7785 case elfcpp::R_POWERPC_REL24:
7786 case elfcpp::R_PPC_PLTREL24:
7787 case elfcpp::R_PPC_LOCAL24PC:
7788 case elfcpp::R_PPC64_TPREL16_DS:
7789 case elfcpp::R_PPC64_DTPREL16_DS:
7790 case elfcpp::R_PPC64_TOC16_DS:
7791 case elfcpp::R_PPC64_GOT16_DS:
7792 case elfcpp::R_PPC64_SECTOFF_DS:
7793 case elfcpp::R_POWERPC_REL14:
7794 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7795 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7796 overflow = Reloc::CHECK_SIGNED;
7800 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7803 if (overflow == Reloc::CHECK_LOW_INSN
7804 || overflow == Reloc::CHECK_HIGH_INSN)
7806 insn = elfcpp::Swap<32, big_endian>::readval(iview);
7808 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
7809 overflow = Reloc::CHECK_BITFIELD;
7810 else if (overflow == Reloc::CHECK_LOW_INSN
7811 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
7812 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
7813 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
7814 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
7815 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
7816 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
7817 overflow = Reloc::CHECK_UNSIGNED;
7819 overflow = Reloc::CHECK_SIGNED;
7822 bool maybe_dq_reloc = false;
7823 typename Powerpc_relocate_functions<size, big_endian>::Status status
7824 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
7827 case elfcpp::R_POWERPC_NONE:
7828 case elfcpp::R_POWERPC_TLS:
7829 case elfcpp::R_POWERPC_GNU_VTINHERIT:
7830 case elfcpp::R_POWERPC_GNU_VTENTRY:
7833 case elfcpp::R_PPC64_ADDR64:
7834 case elfcpp::R_PPC64_REL64:
7835 case elfcpp::R_PPC64_TOC:
7836 case elfcpp::R_PPC64_ADDR64_LOCAL:
7837 Reloc::addr64(view, value);
7840 case elfcpp::R_POWERPC_TPREL:
7841 case elfcpp::R_POWERPC_DTPREL:
7843 Reloc::addr64(view, value);
7845 status = Reloc::addr32(view, value, overflow);
7848 case elfcpp::R_PPC64_UADDR64:
7849 Reloc::addr64_u(view, value);
7852 case elfcpp::R_POWERPC_ADDR32:
7853 status = Reloc::addr32(view, value, overflow);
7856 case elfcpp::R_POWERPC_REL32:
7857 case elfcpp::R_POWERPC_UADDR32:
7858 status = Reloc::addr32_u(view, value, overflow);
7861 case elfcpp::R_POWERPC_ADDR24:
7862 case elfcpp::R_POWERPC_REL24:
7863 case elfcpp::R_PPC_PLTREL24:
7864 case elfcpp::R_PPC_LOCAL24PC:
7865 status = Reloc::addr24(view, value, overflow);
7868 case elfcpp::R_POWERPC_GOT_DTPREL16:
7869 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7870 case elfcpp::R_POWERPC_GOT_TPREL16:
7871 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7874 // On ppc64 these are all ds form
7875 maybe_dq_reloc = true;
7878 case elfcpp::R_POWERPC_ADDR16:
7879 case elfcpp::R_POWERPC_REL16:
7880 case elfcpp::R_PPC64_TOC16:
7881 case elfcpp::R_POWERPC_GOT16:
7882 case elfcpp::R_POWERPC_SECTOFF:
7883 case elfcpp::R_POWERPC_TPREL16:
7884 case elfcpp::R_POWERPC_DTPREL16:
7885 case elfcpp::R_POWERPC_GOT_TLSGD16:
7886 case elfcpp::R_POWERPC_GOT_TLSLD16:
7887 case elfcpp::R_POWERPC_ADDR16_LO:
7888 case elfcpp::R_POWERPC_REL16_LO:
7889 case elfcpp::R_PPC64_TOC16_LO:
7890 case elfcpp::R_POWERPC_GOT16_LO:
7891 case elfcpp::R_POWERPC_SECTOFF_LO:
7892 case elfcpp::R_POWERPC_TPREL16_LO:
7893 case elfcpp::R_POWERPC_DTPREL16_LO:
7894 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7895 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7897 status = Reloc::addr16(view, value, overflow);
7899 maybe_dq_reloc = true;
7902 case elfcpp::R_POWERPC_UADDR16:
7903 status = Reloc::addr16_u(view, value, overflow);
7906 case elfcpp::R_PPC64_ADDR16_HIGH:
7907 case elfcpp::R_PPC64_TPREL16_HIGH:
7908 case elfcpp::R_PPC64_DTPREL16_HIGH:
7910 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7912 case elfcpp::R_POWERPC_ADDR16_HI:
7913 case elfcpp::R_POWERPC_REL16_HI:
7914 case elfcpp::R_PPC64_TOC16_HI:
7915 case elfcpp::R_POWERPC_GOT16_HI:
7916 case elfcpp::R_POWERPC_SECTOFF_HI:
7917 case elfcpp::R_POWERPC_TPREL16_HI:
7918 case elfcpp::R_POWERPC_DTPREL16_HI:
7919 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7920 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7921 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7922 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7923 Reloc::addr16_hi(view, value);
7926 case elfcpp::R_PPC64_ADDR16_HIGHA:
7927 case elfcpp::R_PPC64_TPREL16_HIGHA:
7928 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7930 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7932 case elfcpp::R_POWERPC_ADDR16_HA:
7933 case elfcpp::R_POWERPC_REL16_HA:
7934 case elfcpp::R_PPC64_TOC16_HA:
7935 case elfcpp::R_POWERPC_GOT16_HA:
7936 case elfcpp::R_POWERPC_SECTOFF_HA:
7937 case elfcpp::R_POWERPC_TPREL16_HA:
7938 case elfcpp::R_POWERPC_DTPREL16_HA:
7939 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7940 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7941 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7942 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7943 Reloc::addr16_ha(view, value);
7946 case elfcpp::R_POWERPC_REL16DX_HA:
7947 status = Reloc::addr16dx_ha(view, value, overflow);
7950 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7952 // R_PPC_EMB_NADDR16_LO
7954 case elfcpp::R_PPC64_ADDR16_HIGHER:
7955 case elfcpp::R_PPC64_TPREL16_HIGHER:
7956 Reloc::addr16_hi2(view, value);
7959 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7961 // R_PPC_EMB_NADDR16_HI
7963 case elfcpp::R_PPC64_ADDR16_HIGHERA:
7964 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7965 Reloc::addr16_ha2(view, value);
7968 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7970 // R_PPC_EMB_NADDR16_HA
7972 case elfcpp::R_PPC64_ADDR16_HIGHEST:
7973 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7974 Reloc::addr16_hi3(view, value);
7977 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7981 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
7982 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7983 Reloc::addr16_ha3(view, value);
7986 case elfcpp::R_PPC64_DTPREL16_DS:
7987 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7989 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7991 case elfcpp::R_PPC64_TPREL16_DS:
7992 case elfcpp::R_PPC64_TPREL16_LO_DS:
7994 // R_PPC_TLSGD, R_PPC_TLSLD
7996 case elfcpp::R_PPC64_ADDR16_DS:
7997 case elfcpp::R_PPC64_ADDR16_LO_DS:
7998 case elfcpp::R_PPC64_TOC16_DS:
7999 case elfcpp::R_PPC64_TOC16_LO_DS:
8000 case elfcpp::R_PPC64_GOT16_DS:
8001 case elfcpp::R_PPC64_GOT16_LO_DS:
8002 case elfcpp::R_PPC64_SECTOFF_DS:
8003 case elfcpp::R_PPC64_SECTOFF_LO_DS:
8004 maybe_dq_reloc = true;
8007 case elfcpp::R_POWERPC_ADDR14:
8008 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
8009 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
8010 case elfcpp::R_POWERPC_REL14:
8011 case elfcpp::R_POWERPC_REL14_BRTAKEN:
8012 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
8013 status = Reloc::addr14(view, value, overflow);
8016 case elfcpp::R_POWERPC_COPY:
8017 case elfcpp::R_POWERPC_GLOB_DAT:
8018 case elfcpp::R_POWERPC_JMP_SLOT:
8019 case elfcpp::R_POWERPC_RELATIVE:
8020 case elfcpp::R_POWERPC_DTPMOD:
8021 case elfcpp::R_PPC64_JMP_IREL:
8022 case elfcpp::R_POWERPC_IRELATIVE:
8023 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8024 _("unexpected reloc %u in object file"),
8028 case elfcpp::R_PPC_EMB_SDA21:
8033 // R_PPC64_TOCSAVE. For the time being this can be ignored.
8037 case elfcpp::R_PPC_EMB_SDA2I16:
8038 case elfcpp::R_PPC_EMB_SDA2REL:
8041 // R_PPC64_TLSGD, R_PPC64_TLSLD
8044 case elfcpp::R_POWERPC_PLT32:
8045 case elfcpp::R_POWERPC_PLTREL32:
8046 case elfcpp::R_POWERPC_PLT16_LO:
8047 case elfcpp::R_POWERPC_PLT16_HI:
8048 case elfcpp::R_POWERPC_PLT16_HA:
8049 case elfcpp::R_PPC_SDAREL16:
8050 case elfcpp::R_POWERPC_ADDR30:
8051 case elfcpp::R_PPC64_PLT64:
8052 case elfcpp::R_PPC64_PLTREL64:
8053 case elfcpp::R_PPC64_PLTGOT16:
8054 case elfcpp::R_PPC64_PLTGOT16_LO:
8055 case elfcpp::R_PPC64_PLTGOT16_HI:
8056 case elfcpp::R_PPC64_PLTGOT16_HA:
8057 case elfcpp::R_PPC64_PLT16_LO_DS:
8058 case elfcpp::R_PPC64_PLTGOT16_DS:
8059 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
8060 case elfcpp::R_PPC_EMB_RELSDA:
8061 case elfcpp::R_PPC_TOC16:
8064 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8065 _("unsupported reloc %u"),
8073 insn = elfcpp::Swap<32, big_endian>::readval(iview);
8075 if ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8076 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8077 && (insn & 3) == 1))
8078 status = Reloc::addr16_dq(view, value, overflow);
8080 || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8081 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8082 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8083 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */)
8084 status = Reloc::addr16_ds(view, value, overflow);
8086 status = Reloc::addr16(view, value, overflow);
8089 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
8092 && gsym->is_undefined()
8093 && is_branch_reloc(r_type))))
8095 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8096 _("relocation overflow"));
8098 gold_info(_("try relinking with a smaller --stub-group-size"));
8104 // Relocate section data.
8106 template<int size, bool big_endian>
8108 Target_powerpc<size, big_endian>::relocate_section(
8109 const Relocate_info<size, big_endian>* relinfo,
8110 unsigned int sh_type,
8111 const unsigned char* prelocs,
8113 Output_section* output_section,
8114 bool needs_special_offset_handling,
8115 unsigned char* view,
8117 section_size_type view_size,
8118 const Reloc_symbol_changes* reloc_symbol_changes)
8120 typedef Target_powerpc<size, big_endian> Powerpc;
8121 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
8122 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
8123 Powerpc_comdat_behavior;
8125 gold_assert(sh_type == elfcpp::SHT_RELA);
8127 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
8128 Powerpc_relocate, Powerpc_comdat_behavior>(
8134 needs_special_offset_handling,
8138 reloc_symbol_changes);
8141 class Powerpc_scan_relocatable_reloc
8144 // Return the strategy to use for a local symbol which is not a
8145 // section symbol, given the relocation type.
8146 inline Relocatable_relocs::Reloc_strategy
8147 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
8149 if (r_type == 0 && r_sym == 0)
8150 return Relocatable_relocs::RELOC_DISCARD;
8151 return Relocatable_relocs::RELOC_COPY;
8154 // Return the strategy to use for a local symbol which is a section
8155 // symbol, given the relocation type.
8156 inline Relocatable_relocs::Reloc_strategy
8157 local_section_strategy(unsigned int, Relobj*)
8159 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
8162 // Return the strategy to use for a global symbol, given the
8163 // relocation type, the object, and the symbol index.
8164 inline Relocatable_relocs::Reloc_strategy
8165 global_strategy(unsigned int r_type, Relobj*, unsigned int)
8167 if (r_type == elfcpp::R_PPC_PLTREL24)
8168 return Relocatable_relocs::RELOC_SPECIAL;
8169 return Relocatable_relocs::RELOC_COPY;
8173 // Scan the relocs during a relocatable link.
8175 template<int size, bool big_endian>
8177 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
8178 Symbol_table* symtab,
8180 Sized_relobj_file<size, big_endian>* object,
8181 unsigned int data_shndx,
8182 unsigned int sh_type,
8183 const unsigned char* prelocs,
8185 Output_section* output_section,
8186 bool needs_special_offset_handling,
8187 size_t local_symbol_count,
8188 const unsigned char* plocal_symbols,
8189 Relocatable_relocs* rr)
8191 gold_assert(sh_type == elfcpp::SHT_RELA);
8193 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
8194 Powerpc_scan_relocatable_reloc>(
8202 needs_special_offset_handling,
8208 // Emit relocations for a section.
8209 // This is a modified version of the function by the same name in
8210 // target-reloc.h. Using relocate_special_relocatable for
8211 // R_PPC_PLTREL24 would require duplication of the entire body of the
8212 // loop, so we may as well duplicate the whole thing.
8214 template<int size, bool big_endian>
8216 Target_powerpc<size, big_endian>::relocate_relocs(
8217 const Relocate_info<size, big_endian>* relinfo,
8218 unsigned int sh_type,
8219 const unsigned char* prelocs,
8221 Output_section* output_section,
8222 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
8223 const Relocatable_relocs* rr,
8225 Address view_address,
8227 unsigned char* reloc_view,
8228 section_size_type reloc_view_size)
8230 gold_assert(sh_type == elfcpp::SHT_RELA);
8232 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
8234 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
8236 const int reloc_size
8237 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
8239 Powerpc_relobj<size, big_endian>* const object
8240 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
8241 const unsigned int local_count = object->local_symbol_count();
8242 unsigned int got2_shndx = object->got2_shndx();
8243 Address got2_addend = 0;
8244 if (got2_shndx != 0)
8246 got2_addend = object->get_output_section_offset(got2_shndx);
8247 gold_assert(got2_addend != invalid_address);
8250 unsigned char* pwrite = reloc_view;
8251 bool zap_next = false;
8252 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
8254 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
8255 if (strategy == Relocatable_relocs::RELOC_DISCARD)
8258 Reltype reloc(prelocs);
8259 Reltype_write reloc_write(pwrite);
8261 Address offset = reloc.get_r_offset();
8262 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
8263 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
8264 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
8265 const unsigned int orig_r_sym = r_sym;
8266 typename elfcpp::Elf_types<size>::Elf_Swxword addend
8267 = reloc.get_r_addend();
8268 const Symbol* gsym = NULL;
8272 // We could arrange to discard these and other relocs for
8273 // tls optimised sequences in the strategy methods, but for
8274 // now do as BFD ld does.
8275 r_type = elfcpp::R_POWERPC_NONE;
8279 // Get the new symbol index.
8280 Output_section* os = NULL;
8281 if (r_sym < local_count)
8285 case Relocatable_relocs::RELOC_COPY:
8286 case Relocatable_relocs::RELOC_SPECIAL:
8289 r_sym = object->symtab_index(r_sym);
8290 gold_assert(r_sym != -1U);
8294 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
8296 // We are adjusting a section symbol. We need to find
8297 // the symbol table index of the section symbol for
8298 // the output section corresponding to input section
8299 // in which this symbol is defined.
8300 gold_assert(r_sym < local_count);
8302 unsigned int shndx =
8303 object->local_symbol_input_shndx(r_sym, &is_ordinary);
8304 gold_assert(is_ordinary);
8305 os = object->output_section(shndx);
8306 gold_assert(os != NULL);
8307 gold_assert(os->needs_symtab_index());
8308 r_sym = os->symtab_index();
8318 gsym = object->global_symbol(r_sym);
8319 gold_assert(gsym != NULL);
8320 if (gsym->is_forwarder())
8321 gsym = relinfo->symtab->resolve_forwards(gsym);
8323 gold_assert(gsym->has_symtab_index());
8324 r_sym = gsym->symtab_index();
8327 // Get the new offset--the location in the output section where
8328 // this relocation should be applied.
8329 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8330 offset += offset_in_output_section;
8333 section_offset_type sot_offset =
8334 convert_types<section_offset_type, Address>(offset);
8335 section_offset_type new_sot_offset =
8336 output_section->output_offset(object, relinfo->data_shndx,
8338 gold_assert(new_sot_offset != -1);
8339 offset = new_sot_offset;
8342 // In an object file, r_offset is an offset within the section.
8343 // In an executable or dynamic object, generated by
8344 // --emit-relocs, r_offset is an absolute address.
8345 if (!parameters->options().relocatable())
8347 offset += view_address;
8348 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8349 offset -= offset_in_output_section;
8352 // Handle the reloc addend based on the strategy.
8353 if (strategy == Relocatable_relocs::RELOC_COPY)
8355 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
8357 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
8358 gold_assert(os != NULL);
8359 addend = psymval->value(object, addend) - os->address();
8361 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
8363 if (addend >= 32768)
8364 addend += got2_addend;
8369 if (!parameters->options().relocatable())
8371 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8372 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
8373 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
8374 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
8376 // First instruction of a global dynamic sequence,
8378 const bool final = gsym == NULL || gsym->final_value_is_known();
8379 switch (this->optimize_tls_gd(final))
8381 case tls::TLSOPT_TO_IE:
8382 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
8383 - elfcpp::R_POWERPC_GOT_TLSGD16);
8385 case tls::TLSOPT_TO_LE:
8386 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8387 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
8388 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8391 r_type = elfcpp::R_POWERPC_NONE;
8392 offset -= 2 * big_endian;
8399 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8400 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
8401 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
8402 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
8404 // First instruction of a local dynamic sequence,
8406 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8408 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8409 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
8411 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8412 const Output_section* os = relinfo->layout->tls_segment()
8414 gold_assert(os != NULL);
8415 gold_assert(os->needs_symtab_index());
8416 r_sym = os->symtab_index();
8417 addend = dtp_offset;
8421 r_type = elfcpp::R_POWERPC_NONE;
8422 offset -= 2 * big_endian;
8426 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8427 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
8428 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
8429 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
8431 // First instruction of initial exec sequence.
8432 const bool final = gsym == NULL || gsym->final_value_is_known();
8433 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8435 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8436 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
8437 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8440 r_type = elfcpp::R_POWERPC_NONE;
8441 offset -= 2 * big_endian;
8445 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
8446 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
8448 // Second instruction of a global dynamic sequence,
8449 // the __tls_get_addr call
8450 const bool final = gsym == NULL || gsym->final_value_is_known();
8451 switch (this->optimize_tls_gd(final))
8453 case tls::TLSOPT_TO_IE:
8454 r_type = elfcpp::R_POWERPC_NONE;
8457 case tls::TLSOPT_TO_LE:
8458 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8459 offset += 2 * big_endian;
8466 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
8467 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
8469 // Second instruction of a local dynamic sequence,
8470 // the __tls_get_addr call
8471 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8473 const Output_section* os = relinfo->layout->tls_segment()
8475 gold_assert(os != NULL);
8476 gold_assert(os->needs_symtab_index());
8477 r_sym = os->symtab_index();
8478 addend = dtp_offset;
8479 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8480 offset += 2 * big_endian;
8484 else if (r_type == elfcpp::R_POWERPC_TLS)
8486 // Second instruction of an initial exec sequence
8487 const bool final = gsym == NULL || gsym->final_value_is_known();
8488 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8490 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8491 offset += 2 * big_endian;
8496 reloc_write.put_r_offset(offset);
8497 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
8498 reloc_write.put_r_addend(addend);
8500 pwrite += reloc_size;
8503 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
8504 == reloc_view_size);
8507 // Return the value to use for a dynamic symbol which requires special
8508 // treatment. This is how we support equality comparisons of function
8509 // pointers across shared library boundaries, as described in the
8510 // processor specific ABI supplement.
8512 template<int size, bool big_endian>
8514 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
8518 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
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 PLT address to use for a local symbol.
8538 template<int size, bool big_endian>
8540 Target_powerpc<size, big_endian>::do_plt_address_for_local(
8541 const Relobj* object,
8542 unsigned int symndx) const
8546 const Sized_relobj<size, big_endian>* relobj
8547 = static_cast<const Sized_relobj<size, big_endian>*>(object);
8548 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8549 p != this->stub_tables_.end();
8552 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
8554 if (off != invalid_address)
8555 return (*p)->stub_address() + off;
8561 // Return the PLT address to use for a global symbol.
8562 template<int size, bool big_endian>
8564 Target_powerpc<size, big_endian>::do_plt_address_for_global(
8565 const Symbol* gsym) const
8569 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8570 p != this->stub_tables_.end();
8573 Address off = (*p)->find_plt_call_entry(gsym);
8574 if (off != invalid_address)
8575 return (*p)->stub_address() + off;
8578 else if (this->abiversion() >= 2)
8580 Address off = this->glink_section()->find_global_entry(gsym);
8581 if (off != invalid_address)
8582 return this->glink_section()->global_entry_address() + off;
8587 // Return the offset to use for the GOT_INDX'th got entry which is
8588 // for a local tls symbol specified by OBJECT, SYMNDX.
8589 template<int size, bool big_endian>
8591 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
8592 const Relobj* object,
8593 unsigned int symndx,
8594 unsigned int got_indx) const
8596 const Powerpc_relobj<size, big_endian>* ppc_object
8597 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
8598 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
8600 for (Got_type got_type = GOT_TYPE_TLSGD;
8601 got_type <= GOT_TYPE_TPREL;
8602 got_type = Got_type(got_type + 1))
8603 if (ppc_object->local_has_got_offset(symndx, got_type))
8605 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
8606 if (got_type == GOT_TYPE_TLSGD)
8608 if (off == got_indx * (size / 8))
8610 if (got_type == GOT_TYPE_TPREL)
8620 // Return the offset to use for the GOT_INDX'th got entry which is
8621 // for global tls symbol GSYM.
8622 template<int size, bool big_endian>
8624 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
8626 unsigned int got_indx) const
8628 if (gsym->type() == elfcpp::STT_TLS)
8630 for (Got_type got_type = GOT_TYPE_TLSGD;
8631 got_type <= GOT_TYPE_TPREL;
8632 got_type = Got_type(got_type + 1))
8633 if (gsym->has_got_offset(got_type))
8635 unsigned int off = gsym->got_offset(got_type);
8636 if (got_type == GOT_TYPE_TLSGD)
8638 if (off == got_indx * (size / 8))
8640 if (got_type == GOT_TYPE_TPREL)
8650 // The selector for powerpc object files.
8652 template<int size, bool big_endian>
8653 class Target_selector_powerpc : public Target_selector
8656 Target_selector_powerpc()
8657 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
8660 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
8661 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
8663 ? (big_endian ? "elf64ppc" : "elf64lppc")
8664 : (big_endian ? "elf32ppc" : "elf32lppc")))
8668 do_instantiate_target()
8669 { return new Target_powerpc<size, big_endian>(); }
8672 Target_selector_powerpc<32, true> target_selector_ppc32;
8673 Target_selector_powerpc<32, false> target_selector_ppc32le;
8674 Target_selector_powerpc<64, true> target_selector_ppc64;
8675 Target_selector_powerpc<64, false> target_selector_ppc64le;
8677 // Instantiate these constants for -O0
8678 template<int size, bool big_endian>
8679 const int Output_data_glink<size, big_endian>::pltresolve_size;
8680 template<int size, bool big_endian>
8681 const typename Output_data_glink<size, big_endian>::Address
8682 Output_data_glink<size, big_endian>::invalid_address;
8683 template<int size, bool big_endian>
8684 const typename Stub_table<size, big_endian>::Address
8685 Stub_table<size, big_endian>::invalid_address;
8686 template<int size, bool big_endian>
8687 const typename Target_powerpc<size, big_endian>::Address
8688 Target_powerpc<size, big_endian>::invalid_address;
8690 } // End anonymous namespace.