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 this->copy_relocs_.copy_reloc(symtab, layout,
1211 symtab->get_sized_symbol<size>(sym),
1212 object, shndx, output_section,
1213 reloc, this->rela_dyn_section(layout));
1216 // Look over all the input sections, deciding where to place stubs.
1218 group_sections(Layout*, const Task*, bool);
1220 // Sort output sections by address.
1221 struct Sort_sections
1224 operator()(const Output_section* sec1, const Output_section* sec2)
1225 { return sec1->address() < sec2->address(); }
1231 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
1232 unsigned int data_shndx,
1234 unsigned int r_type,
1237 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
1238 r_type_(r_type), r_sym_(r_sym), addend_(addend)
1244 // If this branch needs a plt call stub, or a long branch stub, make one.
1246 make_stub(Stub_table<size, big_endian>*,
1247 Stub_table<size, big_endian>*,
1248 Symbol_table*) const;
1251 // The branch location..
1252 Powerpc_relobj<size, big_endian>* object_;
1253 unsigned int shndx_;
1255 // ..and the branch type and destination.
1256 unsigned int r_type_;
1257 unsigned int r_sym_;
1261 // Information about this specific target which we pass to the
1262 // general Target structure.
1263 static Target::Target_info powerpc_info;
1265 // The types of GOT entries needed for this platform.
1266 // These values are exposed to the ABI in an incremental link.
1267 // Do not renumber existing values without changing the version
1268 // number of the .gnu_incremental_inputs section.
1272 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
1273 GOT_TYPE_DTPREL, // entry for @got@dtprel
1274 GOT_TYPE_TPREL // entry for @got@tprel
1278 Output_data_got_powerpc<size, big_endian>* got_;
1279 // The PLT section. This is a container for a table of addresses,
1280 // and their relocations. Each address in the PLT has a dynamic
1281 // relocation (R_*_JMP_SLOT) and each address will have a
1282 // corresponding entry in .glink for lazy resolution of the PLT.
1283 // ppc32 initialises the PLT to point at the .glink entry, while
1284 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1285 // linker adds a stub that loads the PLT entry into ctr then
1286 // branches to ctr. There may be more than one stub for each PLT
1287 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1288 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1289 Output_data_plt_powerpc<size, big_endian>* plt_;
1290 // The IPLT section. Like plt_, this is a container for a table of
1291 // addresses and their relocations, specifically for STT_GNU_IFUNC
1292 // functions that resolve locally (STT_GNU_IFUNC functions that
1293 // don't resolve locally go in PLT). Unlike plt_, these have no
1294 // entry in .glink for lazy resolution, and the relocation section
1295 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1296 // the relocation section may contain relocations against
1297 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1298 // relocation section will appear at the end of other dynamic
1299 // relocations, so that ld.so applies these relocations after other
1300 // dynamic relocations. In a static executable, the relocation
1301 // section is emitted and marked with __rela_iplt_start and
1302 // __rela_iplt_end symbols.
1303 Output_data_plt_powerpc<size, big_endian>* iplt_;
1304 // Section holding long branch destinations.
1305 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
1306 // The .glink section.
1307 Output_data_glink<size, big_endian>* glink_;
1308 // The dynamic reloc section.
1309 Reloc_section* rela_dyn_;
1310 // Relocs saved to avoid a COPY reloc.
1311 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
1312 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1313 unsigned int tlsld_got_offset_;
1315 Stub_tables stub_tables_;
1316 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
1317 Branch_lookup_table branch_lookup_table_;
1319 typedef std::vector<Branch_info> Branches;
1320 Branches branch_info_;
1322 bool plt_thread_safe_;
1325 int relax_fail_count_;
1326 int32_t stub_group_size_;
1328 Output_data_save_res<size, big_endian> *savres_section_;
1332 Target::Target_info Target_powerpc<32, true>::powerpc_info =
1335 true, // is_big_endian
1336 elfcpp::EM_PPC, // machine_code
1337 false, // has_make_symbol
1338 false, // has_resolve
1339 false, // has_code_fill
1340 true, // is_default_stack_executable
1341 false, // can_icf_inline_merge_sections
1343 "/usr/lib/ld.so.1", // dynamic_linker
1344 0x10000000, // default_text_segment_address
1345 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1346 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1347 false, // isolate_execinstr
1349 elfcpp::SHN_UNDEF, // small_common_shndx
1350 elfcpp::SHN_UNDEF, // large_common_shndx
1351 0, // small_common_section_flags
1352 0, // large_common_section_flags
1353 NULL, // attributes_section
1354 NULL, // attributes_vendor
1355 "_start", // entry_symbol_name
1356 32, // hash_entry_size
1360 Target::Target_info Target_powerpc<32, false>::powerpc_info =
1363 false, // is_big_endian
1364 elfcpp::EM_PPC, // machine_code
1365 false, // has_make_symbol
1366 false, // has_resolve
1367 false, // has_code_fill
1368 true, // is_default_stack_executable
1369 false, // can_icf_inline_merge_sections
1371 "/usr/lib/ld.so.1", // dynamic_linker
1372 0x10000000, // default_text_segment_address
1373 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1374 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1375 false, // isolate_execinstr
1377 elfcpp::SHN_UNDEF, // small_common_shndx
1378 elfcpp::SHN_UNDEF, // large_common_shndx
1379 0, // small_common_section_flags
1380 0, // large_common_section_flags
1381 NULL, // attributes_section
1382 NULL, // attributes_vendor
1383 "_start", // entry_symbol_name
1384 32, // hash_entry_size
1388 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1391 true, // is_big_endian
1392 elfcpp::EM_PPC64, // machine_code
1393 false, // has_make_symbol
1394 false, // has_resolve
1395 false, // has_code_fill
1396 true, // is_default_stack_executable
1397 false, // can_icf_inline_merge_sections
1399 "/usr/lib/ld.so.1", // dynamic_linker
1400 0x10000000, // default_text_segment_address
1401 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1402 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1403 false, // isolate_execinstr
1405 elfcpp::SHN_UNDEF, // small_common_shndx
1406 elfcpp::SHN_UNDEF, // large_common_shndx
1407 0, // small_common_section_flags
1408 0, // large_common_section_flags
1409 NULL, // attributes_section
1410 NULL, // attributes_vendor
1411 "_start", // entry_symbol_name
1412 32, // hash_entry_size
1416 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1419 false, // is_big_endian
1420 elfcpp::EM_PPC64, // machine_code
1421 false, // has_make_symbol
1422 false, // has_resolve
1423 false, // has_code_fill
1424 true, // is_default_stack_executable
1425 false, // can_icf_inline_merge_sections
1427 "/usr/lib/ld.so.1", // dynamic_linker
1428 0x10000000, // default_text_segment_address
1429 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1430 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1431 false, // isolate_execinstr
1433 elfcpp::SHN_UNDEF, // small_common_shndx
1434 elfcpp::SHN_UNDEF, // large_common_shndx
1435 0, // small_common_section_flags
1436 0, // large_common_section_flags
1437 NULL, // attributes_section
1438 NULL, // attributes_vendor
1439 "_start", // entry_symbol_name
1440 32, // hash_entry_size
1444 is_branch_reloc(unsigned int r_type)
1446 return (r_type == elfcpp::R_POWERPC_REL24
1447 || r_type == elfcpp::R_PPC_PLTREL24
1448 || r_type == elfcpp::R_PPC_LOCAL24PC
1449 || r_type == elfcpp::R_POWERPC_REL14
1450 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1451 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1452 || r_type == elfcpp::R_POWERPC_ADDR24
1453 || r_type == elfcpp::R_POWERPC_ADDR14
1454 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1455 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1458 // If INSN is an opcode that may be used with an @tls operand, return
1459 // the transformed insn for TLS optimisation, otherwise return 0. If
1460 // REG is non-zero only match an insn with RB or RA equal to REG.
1462 at_tls_transform(uint32_t insn, unsigned int reg)
1464 if ((insn & (0x3f << 26)) != 31 << 26)
1468 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1469 rtra = insn & ((1 << 26) - (1 << 16));
1470 else if (((insn >> 16) & 0x1f) == reg)
1471 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1475 if ((insn & (0x3ff << 1)) == 266 << 1)
1478 else if ((insn & (0x1f << 1)) == 23 << 1
1479 && ((insn & (0x1f << 6)) < 14 << 6
1480 || ((insn & (0x1f << 6)) >= 16 << 6
1481 && (insn & (0x1f << 6)) < 24 << 6)))
1482 // load and store indexed -> dform
1483 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1484 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1485 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1486 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1487 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1489 insn = (58 << 26) | 2;
1497 template<int size, bool big_endian>
1498 class Powerpc_relocate_functions
1518 typedef Powerpc_relocate_functions<size, big_endian> This;
1519 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1521 template<int valsize>
1523 has_overflow_signed(Address value)
1525 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1526 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1527 limit <<= ((valsize - 1) >> 1);
1528 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1529 return value + limit > (limit << 1) - 1;
1532 template<int valsize>
1534 has_overflow_unsigned(Address value)
1536 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1537 limit <<= ((valsize - 1) >> 1);
1538 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1539 return value > (limit << 1) - 1;
1542 template<int valsize>
1544 has_overflow_bitfield(Address value)
1546 return (has_overflow_unsigned<valsize>(value)
1547 && has_overflow_signed<valsize>(value));
1550 template<int valsize>
1551 static inline Status
1552 overflowed(Address value, Overflow_check overflow)
1554 if (overflow == CHECK_SIGNED)
1556 if (has_overflow_signed<valsize>(value))
1557 return STATUS_OVERFLOW;
1559 else if (overflow == CHECK_UNSIGNED)
1561 if (has_overflow_unsigned<valsize>(value))
1562 return STATUS_OVERFLOW;
1564 else if (overflow == CHECK_BITFIELD)
1566 if (has_overflow_bitfield<valsize>(value))
1567 return STATUS_OVERFLOW;
1572 // Do a simple RELA relocation
1573 template<int fieldsize, int valsize>
1574 static inline Status
1575 rela(unsigned char* view, Address value, Overflow_check overflow)
1577 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1578 Valtype* wv = reinterpret_cast<Valtype*>(view);
1579 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value);
1580 return overflowed<valsize>(value, overflow);
1583 template<int fieldsize, int valsize>
1584 static inline Status
1585 rela(unsigned char* view,
1586 unsigned int right_shift,
1587 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1589 Overflow_check overflow)
1591 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1592 Valtype* wv = reinterpret_cast<Valtype*>(view);
1593 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv);
1594 Valtype reloc = value >> right_shift;
1597 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc);
1598 return overflowed<valsize>(value >> right_shift, overflow);
1601 // Do a simple RELA relocation, unaligned.
1602 template<int fieldsize, int valsize>
1603 static inline Status
1604 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1606 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value);
1607 return overflowed<valsize>(value, overflow);
1610 template<int fieldsize, int valsize>
1611 static inline Status
1612 rela_ua(unsigned char* view,
1613 unsigned int right_shift,
1614 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1616 Overflow_check overflow)
1618 typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype
1620 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view);
1621 Valtype reloc = value >> right_shift;
1624 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc);
1625 return overflowed<valsize>(value >> right_shift, overflow);
1629 // R_PPC64_ADDR64: (Symbol + Addend)
1631 addr64(unsigned char* view, Address value)
1632 { This::template rela<64,64>(view, value, CHECK_NONE); }
1634 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1636 addr64_u(unsigned char* view, Address value)
1637 { This::template rela_ua<64,64>(view, value, CHECK_NONE); }
1639 // R_POWERPC_ADDR32: (Symbol + Addend)
1640 static inline Status
1641 addr32(unsigned char* view, Address value, Overflow_check overflow)
1642 { return This::template rela<32,32>(view, value, overflow); }
1644 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1645 static inline Status
1646 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1647 { return This::template rela_ua<32,32>(view, value, overflow); }
1649 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1650 static inline Status
1651 addr24(unsigned char* view, Address value, Overflow_check overflow)
1653 Status stat = This::template rela<32,26>(view, 0, 0x03fffffc,
1655 if (overflow != CHECK_NONE && (value & 3) != 0)
1656 stat = STATUS_OVERFLOW;
1660 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1661 static inline Status
1662 addr16(unsigned char* view, Address value, Overflow_check overflow)
1663 { return This::template rela<16,16>(view, value, overflow); }
1665 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1666 static inline Status
1667 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1668 { return This::template rela_ua<16,16>(view, value, overflow); }
1670 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1671 static inline Status
1672 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1674 Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow);
1675 if ((value & 3) != 0)
1676 stat = STATUS_OVERFLOW;
1680 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1682 addr16_hi(unsigned char* view, Address value)
1683 { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); }
1685 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1687 addr16_ha(unsigned char* view, Address value)
1688 { This::addr16_hi(view, value + 0x8000); }
1690 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1692 addr16_hi2(unsigned char* view, Address value)
1693 { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); }
1695 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1697 addr16_ha2(unsigned char* view, Address value)
1698 { This::addr16_hi2(view, value + 0x8000); }
1700 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1702 addr16_hi3(unsigned char* view, Address value)
1703 { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); }
1705 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1707 addr16_ha3(unsigned char* view, Address value)
1708 { This::addr16_hi3(view, value + 0x8000); }
1710 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1711 static inline Status
1712 addr14(unsigned char* view, Address value, Overflow_check overflow)
1714 Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow);
1715 if (overflow != CHECK_NONE && (value & 3) != 0)
1716 stat = STATUS_OVERFLOW;
1721 // Set ABI version for input and output.
1723 template<int size, bool big_endian>
1725 Powerpc_relobj<size, big_endian>::set_abiversion(int ver)
1727 this->e_flags_ |= ver;
1728 if (this->abiversion() != 0)
1730 Target_powerpc<size, big_endian>* target =
1731 static_cast<Target_powerpc<size, big_endian>*>(
1732 parameters->sized_target<size, big_endian>());
1733 if (target->abiversion() == 0)
1734 target->set_abiversion(this->abiversion());
1735 else if (target->abiversion() != this->abiversion())
1736 gold_error(_("%s: ABI version %d is not compatible "
1737 "with ABI version %d output"),
1738 this->name().c_str(),
1739 this->abiversion(), target->abiversion());
1744 // Stash away the index of .got2 or .opd in a relocatable object, if
1745 // such a section exists.
1747 template<int size, bool big_endian>
1749 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1750 Read_symbols_data* sd)
1752 const unsigned char* const pshdrs = sd->section_headers->data();
1753 const unsigned char* namesu = sd->section_names->data();
1754 const char* names = reinterpret_cast<const char*>(namesu);
1755 section_size_type names_size = sd->section_names_size;
1756 const unsigned char* s;
1758 s = this->template find_shdr<size, big_endian>(pshdrs,
1759 size == 32 ? ".got2" : ".opd",
1760 names, names_size, NULL);
1763 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1764 this->special_ = ndx;
1767 if (this->abiversion() == 0)
1768 this->set_abiversion(1);
1769 else if (this->abiversion() > 1)
1770 gold_error(_("%s: .opd invalid in abiv%d"),
1771 this->name().c_str(), this->abiversion());
1774 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1777 // Examine .rela.opd to build info about function entry points.
1779 template<int size, bool big_endian>
1781 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1783 const unsigned char* prelocs,
1784 const unsigned char* plocal_syms)
1788 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1790 const int reloc_size
1791 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1792 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1793 Address expected_off = 0;
1794 bool regular = true;
1795 unsigned int opd_ent_size = 0;
1797 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1799 Reltype reloc(prelocs);
1800 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1801 = reloc.get_r_info();
1802 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1803 if (r_type == elfcpp::R_PPC64_ADDR64)
1805 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1806 typename elfcpp::Elf_types<size>::Elf_Addr value;
1809 if (r_sym < this->local_symbol_count())
1811 typename elfcpp::Sym<size, big_endian>
1812 lsym(plocal_syms + r_sym * sym_size);
1813 shndx = lsym.get_st_shndx();
1814 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1815 value = lsym.get_st_value();
1818 shndx = this->symbol_section_and_value(r_sym, &value,
1820 this->set_opd_ent(reloc.get_r_offset(), shndx,
1821 value + reloc.get_r_addend());
1824 expected_off = reloc.get_r_offset();
1825 opd_ent_size = expected_off;
1827 else if (expected_off != reloc.get_r_offset())
1829 expected_off += opd_ent_size;
1831 else if (r_type == elfcpp::R_PPC64_TOC)
1833 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1838 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1839 this->name().c_str(), r_type);
1843 if (reloc_count <= 2)
1844 opd_ent_size = this->section_size(this->opd_shndx());
1845 if (opd_ent_size != 24 && opd_ent_size != 16)
1849 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1850 this->name().c_str());
1856 template<int size, bool big_endian>
1858 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1860 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1863 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1864 p != rd->relocs.end();
1867 if (p->data_shndx == this->opd_shndx())
1869 uint64_t opd_size = this->section_size(this->opd_shndx());
1870 gold_assert(opd_size == static_cast<size_t>(opd_size));
1873 this->init_opd(opd_size);
1874 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1875 rd->local_symbols->data());
1883 // Read the symbols then set up st_other vector.
1885 template<int size, bool big_endian>
1887 Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1889 this->base_read_symbols(sd);
1892 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1893 const unsigned char* const pshdrs = sd->section_headers->data();
1894 const unsigned int loccount = this->do_local_symbol_count();
1897 this->st_other_.resize(loccount);
1898 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1899 off_t locsize = loccount * sym_size;
1900 const unsigned int symtab_shndx = this->symtab_shndx();
1901 const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size;
1902 typename elfcpp::Shdr<size, big_endian> shdr(psymtab);
1903 const unsigned char* psyms = this->get_view(shdr.get_sh_offset(),
1904 locsize, true, false);
1906 for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
1908 elfcpp::Sym<size, big_endian> sym(psyms);
1909 unsigned char st_other = sym.get_st_other();
1910 this->st_other_[i] = st_other;
1911 if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
1913 if (this->abiversion() == 0)
1914 this->set_abiversion(2);
1915 else if (this->abiversion() < 2)
1916 gold_error(_("%s: local symbol %d has invalid st_other"
1917 " for ABI version 1"),
1918 this->name().c_str(), i);
1925 template<int size, bool big_endian>
1927 Powerpc_dynobj<size, big_endian>::set_abiversion(int ver)
1929 this->e_flags_ |= ver;
1930 if (this->abiversion() != 0)
1932 Target_powerpc<size, big_endian>* target =
1933 static_cast<Target_powerpc<size, big_endian>*>(
1934 parameters->sized_target<size, big_endian>());
1935 if (target->abiversion() == 0)
1936 target->set_abiversion(this->abiversion());
1937 else if (target->abiversion() != this->abiversion())
1938 gold_error(_("%s: ABI version %d is not compatible "
1939 "with ABI version %d output"),
1940 this->name().c_str(),
1941 this->abiversion(), target->abiversion());
1946 // Call Sized_dynobj::base_read_symbols to read the symbols then
1947 // read .opd from a dynamic object, filling in opd_ent_ vector,
1949 template<int size, bool big_endian>
1951 Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1953 this->base_read_symbols(sd);
1956 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1957 const unsigned char* const pshdrs = sd->section_headers->data();
1958 const unsigned char* namesu = sd->section_names->data();
1959 const char* names = reinterpret_cast<const char*>(namesu);
1960 const unsigned char* s = NULL;
1961 const unsigned char* opd;
1962 section_size_type opd_size;
1964 // Find and read .opd section.
1967 s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names,
1968 sd->section_names_size,
1973 typename elfcpp::Shdr<size, big_endian> shdr(s);
1974 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
1975 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
1977 if (this->abiversion() == 0)
1978 this->set_abiversion(1);
1979 else if (this->abiversion() > 1)
1980 gold_error(_("%s: .opd invalid in abiv%d"),
1981 this->name().c_str(), this->abiversion());
1983 this->opd_shndx_ = (s - pshdrs) / shdr_size;
1984 this->opd_address_ = shdr.get_sh_addr();
1985 opd_size = convert_to_section_size_type(shdr.get_sh_size());
1986 opd = this->get_view(shdr.get_sh_offset(), opd_size,
1992 // Build set of executable sections.
1993 // Using a set is probably overkill. There is likely to be only
1994 // a few executable sections, typically .init, .text and .fini,
1995 // and they are generally grouped together.
1996 typedef std::set<Sec_info> Exec_sections;
1997 Exec_sections exec_sections;
1999 for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size)
2001 typename elfcpp::Shdr<size, big_endian> shdr(s);
2002 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
2003 && ((shdr.get_sh_flags()
2004 & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
2005 == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
2006 && shdr.get_sh_size() != 0)
2008 exec_sections.insert(Sec_info(shdr.get_sh_addr(),
2009 shdr.get_sh_size(), i));
2012 if (exec_sections.empty())
2015 // Look over the OPD entries. This is complicated by the fact
2016 // that some binaries will use two-word entries while others
2017 // will use the standard three-word entries. In most cases
2018 // the third word (the environment pointer for languages like
2019 // Pascal) is unused and will be zero. If the third word is
2020 // used it should not be pointing into executable sections,
2022 this->init_opd(opd_size);
2023 for (const unsigned char* p = opd; p < opd + opd_size; p += 8)
2025 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype;
2026 const Valtype* valp = reinterpret_cast<const Valtype*>(p);
2027 Valtype val = elfcpp::Swap<64, big_endian>::readval(valp);
2029 // Chances are that this is the third word of an OPD entry.
2031 typename Exec_sections::const_iterator e
2032 = exec_sections.upper_bound(Sec_info(val, 0, 0));
2033 if (e != exec_sections.begin())
2036 if (e->start <= val && val < e->start + e->len)
2038 // We have an address in an executable section.
2039 // VAL ought to be the function entry, set it up.
2040 this->set_opd_ent(p - opd, e->shndx, val);
2041 // Skip second word of OPD entry, the TOC pointer.
2045 // If we didn't match any executable sections, we likely
2046 // have a non-zero third word in the OPD entry.
2051 // Set up some symbols.
2053 template<int size, bool big_endian>
2055 Target_powerpc<size, big_endian>::do_define_standard_symbols(
2056 Symbol_table* symtab,
2061 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2062 // undefined when scanning relocs (and thus requires
2063 // non-relative dynamic relocs). The proper value will be
2065 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2066 if (gotsym != NULL && gotsym->is_undefined())
2068 Target_powerpc<size, big_endian>* target =
2069 static_cast<Target_powerpc<size, big_endian>*>(
2070 parameters->sized_target<size, big_endian>());
2071 Output_data_got_powerpc<size, big_endian>* got
2072 = target->got_section(symtab, layout);
2073 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2074 Symbol_table::PREDEFINED,
2078 elfcpp::STV_HIDDEN, 0,
2082 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2083 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
2084 if (sdasym != NULL && sdasym->is_undefined())
2086 Output_data_space* sdata = new Output_data_space(4, "** sdata");
2088 = layout->add_output_section_data(".sdata", 0,
2090 | elfcpp::SHF_WRITE,
2091 sdata, ORDER_SMALL_DATA, false);
2092 symtab->define_in_output_data("_SDA_BASE_", NULL,
2093 Symbol_table::PREDEFINED,
2094 os, 32768, 0, elfcpp::STT_OBJECT,
2095 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
2101 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2102 Symbol *gotsym = symtab->lookup(".TOC.", NULL);
2103 if (gotsym != NULL && gotsym->is_undefined())
2105 Target_powerpc<size, big_endian>* target =
2106 static_cast<Target_powerpc<size, big_endian>*>(
2107 parameters->sized_target<size, big_endian>());
2108 Output_data_got_powerpc<size, big_endian>* got
2109 = target->got_section(symtab, layout);
2110 symtab->define_in_output_data(".TOC.", NULL,
2111 Symbol_table::PREDEFINED,
2115 elfcpp::STV_HIDDEN, 0,
2121 // Set up PowerPC target specific relobj.
2123 template<int size, bool big_endian>
2125 Target_powerpc<size, big_endian>::do_make_elf_object(
2126 const std::string& name,
2127 Input_file* input_file,
2128 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
2130 int et = ehdr.get_e_type();
2131 // ET_EXEC files are valid input for --just-symbols/-R,
2132 // and we treat them as relocatable objects.
2133 if (et == elfcpp::ET_REL
2134 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
2136 Powerpc_relobj<size, big_endian>* obj =
2137 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
2141 else if (et == elfcpp::ET_DYN)
2143 Powerpc_dynobj<size, big_endian>* obj =
2144 new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr);
2150 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
2155 template<int size, bool big_endian>
2156 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
2159 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
2160 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
2162 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
2163 : Output_data_got<size, big_endian>(),
2164 symtab_(symtab), layout_(layout),
2165 header_ent_cnt_(size == 32 ? 3 : 1),
2166 header_index_(size == 32 ? 0x2000 : 0)
2169 // Override all the Output_data_got methods we use so as to first call
2172 add_global(Symbol* gsym, unsigned int got_type)
2174 this->reserve_ent();
2175 return Output_data_got<size, big_endian>::add_global(gsym, got_type);
2179 add_global_plt(Symbol* gsym, unsigned int got_type)
2181 this->reserve_ent();
2182 return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type);
2186 add_global_tls(Symbol* gsym, unsigned int got_type)
2187 { return this->add_global_plt(gsym, got_type); }
2190 add_global_with_rel(Symbol* gsym, unsigned int got_type,
2191 Output_data_reloc_generic* rel_dyn, unsigned int r_type)
2193 this->reserve_ent();
2194 Output_data_got<size, big_endian>::
2195 add_global_with_rel(gsym, got_type, rel_dyn, r_type);
2199 add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
2200 Output_data_reloc_generic* rel_dyn,
2201 unsigned int r_type_1, unsigned int r_type_2)
2203 this->reserve_ent(2);
2204 Output_data_got<size, big_endian>::
2205 add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2);
2209 add_local(Relobj* object, unsigned int sym_index, unsigned int got_type)
2211 this->reserve_ent();
2212 return Output_data_got<size, big_endian>::add_local(object, sym_index,
2217 add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type)
2219 this->reserve_ent();
2220 return Output_data_got<size, big_endian>::add_local_plt(object, sym_index,
2225 add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type)
2226 { return this->add_local_plt(object, sym_index, got_type); }
2229 add_local_tls_pair(Relobj* object, unsigned int sym_index,
2230 unsigned int got_type,
2231 Output_data_reloc_generic* rel_dyn,
2232 unsigned int r_type)
2234 this->reserve_ent(2);
2235 Output_data_got<size, big_endian>::
2236 add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type);
2240 add_constant(Valtype constant)
2242 this->reserve_ent();
2243 return Output_data_got<size, big_endian>::add_constant(constant);
2247 add_constant_pair(Valtype c1, Valtype c2)
2249 this->reserve_ent(2);
2250 return Output_data_got<size, big_endian>::add_constant_pair(c1, c2);
2253 // Offset of _GLOBAL_OFFSET_TABLE_.
2257 return this->got_offset(this->header_index_);
2260 // Offset of base used to access the GOT/TOC.
2261 // The got/toc pointer reg will be set to this value.
2263 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
2266 return this->g_o_t();
2268 return (this->output_section()->address()
2269 + object->toc_base_offset()
2273 // Ensure our GOT has a header.
2275 set_final_data_size()
2277 if (this->header_ent_cnt_ != 0)
2278 this->make_header();
2279 Output_data_got<size, big_endian>::set_final_data_size();
2282 // First word of GOT header needs some values that are not
2283 // handled by Output_data_got so poke them in here.
2284 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2286 do_write(Output_file* of)
2289 if (size == 32 && this->layout_->dynamic_data() != NULL)
2290 val = this->layout_->dynamic_section()->address();
2292 val = this->output_section()->address() + 0x8000;
2293 this->replace_constant(this->header_index_, val);
2294 Output_data_got<size, big_endian>::do_write(of);
2299 reserve_ent(unsigned int cnt = 1)
2301 if (this->header_ent_cnt_ == 0)
2303 if (this->num_entries() + cnt > this->header_index_)
2304 this->make_header();
2310 this->header_ent_cnt_ = 0;
2311 this->header_index_ = this->num_entries();
2314 Output_data_got<size, big_endian>::add_constant(0);
2315 Output_data_got<size, big_endian>::add_constant(0);
2316 Output_data_got<size, big_endian>::add_constant(0);
2318 // Define _GLOBAL_OFFSET_TABLE_ at the header
2319 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2322 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
2323 sym->set_value(this->g_o_t());
2326 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2327 Symbol_table::PREDEFINED,
2328 this, this->g_o_t(), 0,
2331 elfcpp::STV_HIDDEN, 0,
2335 Output_data_got<size, big_endian>::add_constant(0);
2338 // Stashed pointers.
2339 Symbol_table* symtab_;
2343 unsigned int header_ent_cnt_;
2344 // GOT header index.
2345 unsigned int header_index_;
2348 // Get the GOT section, creating it if necessary.
2350 template<int size, bool big_endian>
2351 Output_data_got_powerpc<size, big_endian>*
2352 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
2355 if (this->got_ == NULL)
2357 gold_assert(symtab != NULL && layout != NULL);
2360 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
2362 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
2363 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2364 this->got_, ORDER_DATA, false);
2370 // Get the dynamic reloc section, creating it if necessary.
2372 template<int size, bool big_endian>
2373 typename Target_powerpc<size, big_endian>::Reloc_section*
2374 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
2376 if (this->rela_dyn_ == NULL)
2378 gold_assert(layout != NULL);
2379 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
2380 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
2381 elfcpp::SHF_ALLOC, this->rela_dyn_,
2382 ORDER_DYNAMIC_RELOCS, false);
2384 return this->rela_dyn_;
2387 // Similarly, but for ifunc symbols get the one for ifunc.
2389 template<int size, bool big_endian>
2390 typename Target_powerpc<size, big_endian>::Reloc_section*
2391 Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
2396 return this->rela_dyn_section(layout);
2398 if (this->iplt_ == NULL)
2399 this->make_iplt_section(symtab, layout);
2400 return this->iplt_->rel_plt();
2406 // Determine the stub group size. The group size is the absolute
2407 // value of the parameter --stub-group-size. If --stub-group-size
2408 // is passed a negative value, we restrict stubs to be always before
2409 // the stubbed branches.
2410 Stub_control(int32_t size, bool no_size_errors)
2411 : state_(NO_GROUP), stub_group_size_(abs(size)),
2412 stub14_group_size_(abs(size) >> 10),
2413 stubs_always_before_branch_(size < 0),
2414 suppress_size_errors_(no_size_errors),
2415 group_end_addr_(0), owner_(NULL), output_section_(NULL)
2419 // Return true iff input section can be handled by current stub
2422 can_add_to_stub_group(Output_section* o,
2423 const Output_section::Input_section* i,
2426 const Output_section::Input_section*
2432 { return output_section_; }
2435 set_output_and_owner(Output_section* o,
2436 const Output_section::Input_section* i)
2438 this->output_section_ = o;
2446 FINDING_STUB_SECTION,
2451 uint32_t stub_group_size_;
2452 uint32_t stub14_group_size_;
2453 bool stubs_always_before_branch_;
2454 bool suppress_size_errors_;
2455 uint64_t group_end_addr_;
2456 const Output_section::Input_section* owner_;
2457 Output_section* output_section_;
2460 // Return true iff input section can be handled by current stub
2464 Stub_control::can_add_to_stub_group(Output_section* o,
2465 const Output_section::Input_section* i,
2469 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
2470 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
2472 uint64_t start_addr = o->address();
2475 // .init and .fini sections are pasted together to form a single
2476 // function. We can't be adding stubs in the middle of the function.
2477 this_size = o->data_size();
2480 start_addr += i->relobj()->output_section_offset(i->shndx());
2481 this_size = i->data_size();
2483 uint64_t end_addr = start_addr + this_size;
2484 bool toobig = this_size > group_size;
2486 if (toobig && !this->suppress_size_errors_)
2487 gold_warning(_("%s:%s exceeds group size"),
2488 i->relobj()->name().c_str(),
2489 i->relobj()->section_name(i->shndx()).c_str());
2491 if (this->state_ != HAS_STUB_SECTION
2492 && (!whole_sec || this->output_section_ != o)
2493 && (this->state_ == NO_GROUP
2494 || this->group_end_addr_ - end_addr < group_size))
2497 this->output_section_ = o;
2500 if (this->state_ == NO_GROUP)
2502 this->state_ = FINDING_STUB_SECTION;
2503 this->group_end_addr_ = end_addr;
2505 else if (this->group_end_addr_ - start_addr < group_size)
2507 // Adding this section would make the group larger than GROUP_SIZE.
2508 else if (this->state_ == FINDING_STUB_SECTION
2509 && !this->stubs_always_before_branch_
2512 // But wait, there's more! Input sections up to GROUP_SIZE
2513 // bytes before the stub table can be handled by it too.
2514 this->state_ = HAS_STUB_SECTION;
2515 this->group_end_addr_ = end_addr;
2519 this->state_ = NO_GROUP;
2525 // Look over all the input sections, deciding where to place stubs.
2527 template<int size, bool big_endian>
2529 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
2531 bool no_size_errors)
2533 Stub_control stub_control(this->stub_group_size_, no_size_errors);
2535 // Group input sections and insert stub table
2536 Stub_table_owner* table_owner = NULL;
2537 std::vector<Stub_table_owner*> tables;
2538 Layout::Section_list section_list;
2539 layout->get_executable_sections(§ion_list);
2540 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
2541 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
2542 o != section_list.rend();
2545 typedef Output_section::Input_section_list Input_section_list;
2546 for (Input_section_list::const_reverse_iterator i
2547 = (*o)->input_sections().rbegin();
2548 i != (*o)->input_sections().rend();
2551 if (i->is_input_section()
2552 || i->is_relaxed_input_section())
2554 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2555 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2556 bool has14 = ppcobj->has_14bit_branch(i->shndx());
2557 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
2559 table_owner->output_section = stub_control.output_section();
2560 table_owner->owner = stub_control.owner();
2561 stub_control.set_output_and_owner(*o, &*i);
2564 if (table_owner == NULL)
2566 table_owner = new Stub_table_owner;
2567 tables.push_back(table_owner);
2569 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2573 if (table_owner != NULL)
2575 const Output_section::Input_section* i = stub_control.owner();
2577 if (tables.size() >= 2 && tables[tables.size() - 2]->owner == i)
2579 // Corner case. A new stub group was made for the first
2580 // section (last one looked at here) for some reason, but
2581 // the first section is already being used as the owner for
2582 // a stub table for following sections. Force it into that
2586 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2587 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2588 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
2592 table_owner->output_section = stub_control.output_section();
2593 table_owner->owner = i;
2596 for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin();
2600 Stub_table<size, big_endian>* stub_table;
2602 if ((*t)->owner->is_input_section())
2603 stub_table = new Stub_table<size, big_endian>(this,
2604 (*t)->output_section,
2606 else if ((*t)->owner->is_relaxed_input_section())
2607 stub_table = static_cast<Stub_table<size, big_endian>*>(
2608 (*t)->owner->relaxed_input_section());
2611 this->stub_tables_.push_back(stub_table);
2616 static unsigned long
2617 max_branch_delta (unsigned int r_type)
2619 if (r_type == elfcpp::R_POWERPC_REL14
2620 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
2621 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2623 if (r_type == elfcpp::R_POWERPC_REL24
2624 || r_type == elfcpp::R_PPC_PLTREL24
2625 || r_type == elfcpp::R_PPC_LOCAL24PC)
2630 // If this branch needs a plt call stub, or a long branch stub, make one.
2632 template<int size, bool big_endian>
2634 Target_powerpc<size, big_endian>::Branch_info::make_stub(
2635 Stub_table<size, big_endian>* stub_table,
2636 Stub_table<size, big_endian>* ifunc_stub_table,
2637 Symbol_table* symtab) const
2639 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2640 if (sym != NULL && sym->is_forwarder())
2641 sym = symtab->resolve_forwards(sym);
2642 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2643 Target_powerpc<size, big_endian>* target =
2644 static_cast<Target_powerpc<size, big_endian>*>(
2645 parameters->sized_target<size, big_endian>());
2647 ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
2648 : this->object_->local_has_plt_offset(this->r_sym_))
2652 && target->abiversion() >= 2
2653 && !parameters->options().output_is_position_independent()
2654 && !is_branch_reloc(this->r_type_))
2655 target->glink_section()->add_global_entry(gsym);
2658 if (stub_table == NULL)
2659 stub_table = this->object_->stub_table(this->shndx_);
2660 if (stub_table == NULL)
2662 // This is a ref from a data section to an ifunc symbol.
2663 stub_table = ifunc_stub_table;
2665 gold_assert(stub_table != NULL);
2666 Address from = this->object_->get_output_section_offset(this->shndx_);
2667 if (from != invalid_address)
2668 from += (this->object_->output_section(this->shndx_)->address()
2671 return stub_table->add_plt_call_entry(from,
2672 this->object_, gsym,
2673 this->r_type_, this->addend_);
2675 return stub_table->add_plt_call_entry(from,
2676 this->object_, this->r_sym_,
2677 this->r_type_, this->addend_);
2682 Address max_branch_offset = max_branch_delta(this->r_type_);
2683 if (max_branch_offset == 0)
2685 Address from = this->object_->get_output_section_offset(this->shndx_);
2686 gold_assert(from != invalid_address);
2687 from += (this->object_->output_section(this->shndx_)->address()
2692 switch (gsym->source())
2694 case Symbol::FROM_OBJECT:
2696 Object* symobj = gsym->object();
2697 if (symobj->is_dynamic()
2698 || symobj->pluginobj() != NULL)
2701 unsigned int shndx = gsym->shndx(&is_ordinary);
2702 if (shndx == elfcpp::SHN_UNDEF)
2707 case Symbol::IS_UNDEFINED:
2713 Symbol_table::Compute_final_value_status status;
2714 to = symtab->compute_final_value<size>(gsym, &status);
2715 if (status != Symbol_table::CFVS_OK)
2718 to += this->object_->ppc64_local_entry_offset(gsym);
2722 const Symbol_value<size>* psymval
2723 = this->object_->local_symbol(this->r_sym_);
2724 Symbol_value<size> symval;
2725 typedef Sized_relobj_file<size, big_endian> ObjType;
2726 typename ObjType::Compute_final_local_value_status status
2727 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2729 if (status != ObjType::CFLV_OK
2730 || !symval.has_output_value())
2732 to = symval.value(this->object_, 0);
2734 to += this->object_->ppc64_local_entry_offset(this->r_sym_);
2736 if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24))
2737 to += this->addend_;
2738 if (stub_table == NULL)
2739 stub_table = this->object_->stub_table(this->shndx_);
2740 if (size == 64 && target->abiversion() < 2)
2742 unsigned int dest_shndx;
2743 if (!target->symval_for_branch(symtab, gsym, this->object_,
2747 Address delta = to - from;
2748 if (delta + max_branch_offset >= 2 * max_branch_offset)
2750 if (stub_table == NULL)
2752 gold_warning(_("%s:%s: branch in non-executable section,"
2753 " no long branch stub for you"),
2754 this->object_->name().c_str(),
2755 this->object_->section_name(this->shndx_).c_str());
2758 bool save_res = (size == 64
2760 && gsym->source() == Symbol::IN_OUTPUT_DATA
2761 && gsym->output_data() == target->savres_section());
2762 return stub_table->add_long_branch_entry(this->object_,
2764 from, to, save_res);
2770 // Relaxation hook. This is where we do stub generation.
2772 template<int size, bool big_endian>
2774 Target_powerpc<size, big_endian>::do_relax(int pass,
2775 const Input_objects*,
2776 Symbol_table* symtab,
2780 unsigned int prev_brlt_size = 0;
2784 = this->abiversion() < 2 && parameters->options().plt_thread_safe();
2786 && this->abiversion() < 2
2788 && !parameters->options().user_set_plt_thread_safe())
2790 static const char* const thread_starter[] =
2794 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2796 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2797 "mq_notify", "create_timer",
2802 "GOMP_parallel_start",
2803 "GOMP_parallel_loop_static",
2804 "GOMP_parallel_loop_static_start",
2805 "GOMP_parallel_loop_dynamic",
2806 "GOMP_parallel_loop_dynamic_start",
2807 "GOMP_parallel_loop_guided",
2808 "GOMP_parallel_loop_guided_start",
2809 "GOMP_parallel_loop_runtime",
2810 "GOMP_parallel_loop_runtime_start",
2811 "GOMP_parallel_sections",
2812 "GOMP_parallel_sections_start",
2817 if (parameters->options().shared())
2821 for (unsigned int i = 0;
2822 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2825 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2826 thread_safe = (sym != NULL
2828 && sym->in_real_elf());
2834 this->plt_thread_safe_ = thread_safe;
2839 this->stub_group_size_ = parameters->options().stub_group_size();
2840 bool no_size_errors = true;
2841 if (this->stub_group_size_ == 1)
2842 this->stub_group_size_ = 0x1c00000;
2843 else if (this->stub_group_size_ == -1)
2844 this->stub_group_size_ = -0x1e00000;
2846 no_size_errors = false;
2847 this->group_sections(layout, task, no_size_errors);
2849 else if (this->relax_failed_ && this->relax_fail_count_ < 3)
2851 this->branch_lookup_table_.clear();
2852 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2853 p != this->stub_tables_.end();
2856 (*p)->clear_stubs(true);
2858 this->stub_tables_.clear();
2859 this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
2860 gold_info(_("%s: stub group size is too large; retrying with %d"),
2861 program_name, this->stub_group_size_);
2862 this->group_sections(layout, task, true);
2865 // We need address of stub tables valid for make_stub.
2866 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2867 p != this->stub_tables_.end();
2870 const Powerpc_relobj<size, big_endian>* object
2871 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2872 Address off = object->get_output_section_offset((*p)->shndx());
2873 gold_assert(off != invalid_address);
2874 Output_section* os = (*p)->output_section();
2875 (*p)->set_address_and_size(os, off);
2880 // Clear plt call stubs, long branch stubs and branch lookup table.
2881 prev_brlt_size = this->branch_lookup_table_.size();
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(false);
2891 // Build all the stubs.
2892 this->relax_failed_ = false;
2893 Stub_table<size, big_endian>* ifunc_stub_table
2894 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2895 Stub_table<size, big_endian>* one_stub_table
2896 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2897 for (typename Branches::const_iterator b = this->branch_info_.begin();
2898 b != this->branch_info_.end();
2901 if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
2902 && !this->relax_failed_)
2904 this->relax_failed_ = true;
2905 this->relax_fail_count_++;
2906 if (this->relax_fail_count_ < 3)
2911 // Did anything change size?
2912 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2913 bool again = num_huge_branches != prev_brlt_size;
2914 if (size == 64 && num_huge_branches != 0)
2915 this->make_brlt_section(layout);
2916 if (size == 64 && again)
2917 this->brlt_section_->set_current_size(num_huge_branches);
2919 typedef Unordered_set<Output_section*> Output_sections;
2920 Output_sections os_need_update;
2921 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2922 p != this->stub_tables_.end();
2925 if ((*p)->size_update())
2928 (*p)->add_eh_frame(layout);
2929 os_need_update.insert((*p)->output_section());
2933 // Set output section offsets for all input sections in an output
2934 // section that just changed size. Anything past the stubs will
2936 for (typename Output_sections::iterator p = os_need_update.begin();
2937 p != os_need_update.end();
2940 Output_section* os = *p;
2942 typedef Output_section::Input_section_list Input_section_list;
2943 for (Input_section_list::const_iterator i = os->input_sections().begin();
2944 i != os->input_sections().end();
2947 off = align_address(off, i->addralign());
2948 if (i->is_input_section() || i->is_relaxed_input_section())
2949 i->relobj()->set_section_offset(i->shndx(), off);
2950 if (i->is_relaxed_input_section())
2952 Stub_table<size, big_endian>* stub_table
2953 = static_cast<Stub_table<size, big_endian>*>(
2954 i->relaxed_input_section());
2955 off += stub_table->set_address_and_size(os, off);
2958 off += i->data_size();
2960 // If .branch_lt is part of this output section, then we have
2961 // just done the offset adjustment.
2962 os->clear_section_offsets_need_adjustment();
2967 && num_huge_branches != 0
2968 && parameters->options().output_is_position_independent())
2970 // Fill in the BRLT relocs.
2971 this->brlt_section_->reset_brlt_sizes();
2972 for (typename Branch_lookup_table::const_iterator p
2973 = this->branch_lookup_table_.begin();
2974 p != this->branch_lookup_table_.end();
2977 this->brlt_section_->add_reloc(p->first, p->second);
2979 this->brlt_section_->finalize_brlt_sizes();
2984 template<int size, bool big_endian>
2986 Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
2987 unsigned char* oview,
2991 uint64_t address = plt->address();
2992 off_t len = plt->data_size();
2994 if (plt == this->glink_)
2996 // See Output_data_glink::do_write() for glink contents.
2999 gold_assert(parameters->doing_static_link());
3000 // Static linking may need stubs, to support ifunc and long
3001 // branches. We need to create an output section for
3002 // .eh_frame early in the link process, to have a place to
3003 // attach stub .eh_frame info. We also need to have
3004 // registered a CIE that matches the stub CIE. Both of
3005 // these requirements are satisfied by creating an FDE and
3006 // CIE for .glink, even though static linking will leave
3007 // .glink zero length.
3008 // ??? Hopefully generating an FDE with a zero address range
3009 // won't confuse anything that consumes .eh_frame info.
3011 else if (size == 64)
3013 // There is one word before __glink_PLTresolve
3017 else if (parameters->options().output_is_position_independent())
3019 // There are two FDEs for a position independent glink.
3020 // The first covers the branch table, the second
3021 // __glink_PLTresolve at the end of glink.
3022 off_t resolve_size = this->glink_->pltresolve_size;
3023 if (oview[9] == elfcpp::DW_CFA_nop)
3024 len -= resolve_size;
3027 address += len - resolve_size;
3034 // Must be a stub table.
3035 const Stub_table<size, big_endian>* stub_table
3036 = static_cast<const Stub_table<size, big_endian>*>(plt);
3037 uint64_t stub_address = stub_table->stub_address();
3038 len -= stub_address - address;
3039 address = stub_address;
3042 *paddress = address;
3046 // A class to handle the PLT data.
3048 template<int size, bool big_endian>
3049 class Output_data_plt_powerpc : public Output_section_data_build
3052 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3053 size, big_endian> Reloc_section;
3055 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
3056 Reloc_section* plt_rel,
3058 : Output_section_data_build(size == 32 ? 4 : 8),
3064 // Add an entry to the PLT.
3069 add_ifunc_entry(Symbol*);
3072 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
3074 // Return the .rela.plt section data.
3081 // Return the number of PLT entries.
3085 if (this->current_data_size() == 0)
3087 return ((this->current_data_size() - this->first_plt_entry_offset())
3088 / this->plt_entry_size());
3093 do_adjust_output_section(Output_section* os)
3098 // Write to a map file.
3100 do_print_to_mapfile(Mapfile* mapfile) const
3101 { mapfile->print_output_data(this, this->name_); }
3104 // Return the offset of the first non-reserved PLT entry.
3106 first_plt_entry_offset() const
3108 // IPLT has no reserved entry.
3109 if (this->name_[3] == 'I')
3111 return this->targ_->first_plt_entry_offset();
3114 // Return the size of each PLT entry.
3116 plt_entry_size() const
3118 return this->targ_->plt_entry_size();
3121 // Write out the PLT data.
3123 do_write(Output_file*);
3125 // The reloc section.
3126 Reloc_section* rel_;
3127 // Allows access to .glink for do_write.
3128 Target_powerpc<size, big_endian>* targ_;
3129 // What to report in map file.
3133 // Add an entry to the PLT.
3135 template<int size, bool big_endian>
3137 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
3139 if (!gsym->has_plt_offset())
3141 section_size_type off = this->current_data_size();
3143 off += this->first_plt_entry_offset();
3144 gsym->set_plt_offset(off);
3145 gsym->set_needs_dynsym_entry();
3146 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
3147 this->rel_->add_global(gsym, dynrel, this, off, 0);
3148 off += this->plt_entry_size();
3149 this->set_current_data_size(off);
3153 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3155 template<int size, bool big_endian>
3157 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
3159 if (!gsym->has_plt_offset())
3161 section_size_type off = this->current_data_size();
3162 gsym->set_plt_offset(off);
3163 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3164 if (size == 64 && this->targ_->abiversion() < 2)
3165 dynrel = elfcpp::R_PPC64_JMP_IREL;
3166 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
3167 off += this->plt_entry_size();
3168 this->set_current_data_size(off);
3172 // Add an entry for a local ifunc symbol to the IPLT.
3174 template<int size, bool big_endian>
3176 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
3177 Sized_relobj_file<size, big_endian>* relobj,
3178 unsigned int local_sym_index)
3180 if (!relobj->local_has_plt_offset(local_sym_index))
3182 section_size_type off = this->current_data_size();
3183 relobj->set_local_plt_offset(local_sym_index, off);
3184 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3185 if (size == 64 && this->targ_->abiversion() < 2)
3186 dynrel = elfcpp::R_PPC64_JMP_IREL;
3187 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
3189 off += this->plt_entry_size();
3190 this->set_current_data_size(off);
3194 static const uint32_t add_0_11_11 = 0x7c0b5a14;
3195 static const uint32_t add_2_2_11 = 0x7c425a14;
3196 static const uint32_t add_3_3_2 = 0x7c631214;
3197 static const uint32_t add_3_3_13 = 0x7c636a14;
3198 static const uint32_t add_11_0_11 = 0x7d605a14;
3199 static const uint32_t add_11_2_11 = 0x7d625a14;
3200 static const uint32_t add_11_11_2 = 0x7d6b1214;
3201 static const uint32_t addi_0_12 = 0x380c0000;
3202 static const uint32_t addi_2_2 = 0x38420000;
3203 static const uint32_t addi_3_3 = 0x38630000;
3204 static const uint32_t addi_11_11 = 0x396b0000;
3205 static const uint32_t addi_12_1 = 0x39810000;
3206 static const uint32_t addi_12_12 = 0x398c0000;
3207 static const uint32_t addis_0_2 = 0x3c020000;
3208 static const uint32_t addis_0_13 = 0x3c0d0000;
3209 static const uint32_t addis_2_12 = 0x3c4c0000;
3210 static const uint32_t addis_11_2 = 0x3d620000;
3211 static const uint32_t addis_11_11 = 0x3d6b0000;
3212 static const uint32_t addis_11_30 = 0x3d7e0000;
3213 static const uint32_t addis_12_1 = 0x3d810000;
3214 static const uint32_t addis_12_2 = 0x3d820000;
3215 static const uint32_t addis_12_12 = 0x3d8c0000;
3216 static const uint32_t b = 0x48000000;
3217 static const uint32_t bcl_20_31 = 0x429f0005;
3218 static const uint32_t bctr = 0x4e800420;
3219 static const uint32_t blr = 0x4e800020;
3220 static const uint32_t bnectr_p4 = 0x4ce20420;
3221 static const uint32_t cmpld_7_12_0 = 0x7fac0040;
3222 static const uint32_t cmpldi_2_0 = 0x28220000;
3223 static const uint32_t cror_15_15_15 = 0x4def7b82;
3224 static const uint32_t cror_31_31_31 = 0x4ffffb82;
3225 static const uint32_t ld_0_1 = 0xe8010000;
3226 static const uint32_t ld_0_12 = 0xe80c0000;
3227 static const uint32_t ld_2_1 = 0xe8410000;
3228 static const uint32_t ld_2_2 = 0xe8420000;
3229 static const uint32_t ld_2_11 = 0xe84b0000;
3230 static const uint32_t ld_11_2 = 0xe9620000;
3231 static const uint32_t ld_11_11 = 0xe96b0000;
3232 static const uint32_t ld_12_2 = 0xe9820000;
3233 static const uint32_t ld_12_11 = 0xe98b0000;
3234 static const uint32_t ld_12_12 = 0xe98c0000;
3235 static const uint32_t lfd_0_1 = 0xc8010000;
3236 static const uint32_t li_0_0 = 0x38000000;
3237 static const uint32_t li_12_0 = 0x39800000;
3238 static const uint32_t lis_0 = 0x3c000000;
3239 static const uint32_t lis_11 = 0x3d600000;
3240 static const uint32_t lis_12 = 0x3d800000;
3241 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
3242 static const uint32_t lwz_0_12 = 0x800c0000;
3243 static const uint32_t lwz_11_11 = 0x816b0000;
3244 static const uint32_t lwz_11_30 = 0x817e0000;
3245 static const uint32_t lwz_12_12 = 0x818c0000;
3246 static const uint32_t lwzu_0_12 = 0x840c0000;
3247 static const uint32_t mflr_0 = 0x7c0802a6;
3248 static const uint32_t mflr_11 = 0x7d6802a6;
3249 static const uint32_t mflr_12 = 0x7d8802a6;
3250 static const uint32_t mtctr_0 = 0x7c0903a6;
3251 static const uint32_t mtctr_11 = 0x7d6903a6;
3252 static const uint32_t mtctr_12 = 0x7d8903a6;
3253 static const uint32_t mtlr_0 = 0x7c0803a6;
3254 static const uint32_t mtlr_12 = 0x7d8803a6;
3255 static const uint32_t nop = 0x60000000;
3256 static const uint32_t ori_0_0_0 = 0x60000000;
3257 static const uint32_t srdi_0_0_2 = 0x7800f082;
3258 static const uint32_t std_0_1 = 0xf8010000;
3259 static const uint32_t std_0_12 = 0xf80c0000;
3260 static const uint32_t std_2_1 = 0xf8410000;
3261 static const uint32_t stfd_0_1 = 0xd8010000;
3262 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
3263 static const uint32_t sub_11_11_12 = 0x7d6c5850;
3264 static const uint32_t sub_12_12_11 = 0x7d8b6050;
3265 static const uint32_t xor_2_12_12 = 0x7d826278;
3266 static const uint32_t xor_11_12_12 = 0x7d8b6278;
3268 // Write out the PLT.
3270 template<int size, bool big_endian>
3272 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
3274 if (size == 32 && this->name_[3] != 'I')
3276 const section_size_type offset = this->offset();
3277 const section_size_type oview_size
3278 = convert_to_section_size_type(this->data_size());
3279 unsigned char* const oview = of->get_output_view(offset, oview_size);
3280 unsigned char* pov = oview;
3281 unsigned char* endpov = oview + oview_size;
3283 // The address of the .glink branch table
3284 const Output_data_glink<size, big_endian>* glink
3285 = this->targ_->glink_section();
3286 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
3288 while (pov < endpov)
3290 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
3295 of->write_output_view(offset, oview_size, oview);
3299 // Create the PLT section.
3301 template<int size, bool big_endian>
3303 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
3306 if (this->plt_ == NULL)
3308 if (this->got_ == NULL)
3309 this->got_section(symtab, layout);
3311 if (this->glink_ == NULL)
3312 make_glink_section(layout);
3314 // Ensure that .rela.dyn always appears before .rela.plt This is
3315 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3316 // needs to include .rela.plt in its range.
3317 this->rela_dyn_section(layout);
3319 Reloc_section* plt_rel = new Reloc_section(false);
3320 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
3321 elfcpp::SHF_ALLOC, plt_rel,
3322 ORDER_DYNAMIC_PLT_RELOCS, false);
3324 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
3326 layout->add_output_section_data(".plt",
3328 ? elfcpp::SHT_PROGBITS
3329 : elfcpp::SHT_NOBITS),
3330 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3339 // Create the IPLT section.
3341 template<int size, bool big_endian>
3343 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
3346 if (this->iplt_ == NULL)
3348 this->make_plt_section(symtab, layout);
3350 Reloc_section* iplt_rel = new Reloc_section(false);
3351 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
3353 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
3355 this->plt_->output_section()->add_output_section_data(this->iplt_);
3359 // A section for huge long branch addresses, similar to plt section.
3361 template<int size, bool big_endian>
3362 class Output_data_brlt_powerpc : public Output_section_data_build
3365 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3366 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3367 size, big_endian> Reloc_section;
3369 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
3370 Reloc_section* brlt_rel)
3371 : Output_section_data_build(size == 32 ? 4 : 8),
3379 this->reset_data_size();
3380 this->rel_->reset_data_size();
3384 finalize_brlt_sizes()
3386 this->finalize_data_size();
3387 this->rel_->finalize_data_size();
3390 // Add a reloc for an entry in the BRLT.
3392 add_reloc(Address to, unsigned int off)
3393 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
3395 // Update section and reloc section size.
3397 set_current_size(unsigned int num_branches)
3399 this->reset_address_and_file_offset();
3400 this->set_current_data_size(num_branches * 16);
3401 this->finalize_data_size();
3402 Output_section* os = this->output_section();
3403 os->set_section_offsets_need_adjustment();
3404 if (this->rel_ != NULL)
3406 unsigned int reloc_size
3407 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
3408 this->rel_->reset_address_and_file_offset();
3409 this->rel_->set_current_data_size(num_branches * reloc_size);
3410 this->rel_->finalize_data_size();
3411 Output_section* os = this->rel_->output_section();
3412 os->set_section_offsets_need_adjustment();
3418 do_adjust_output_section(Output_section* os)
3423 // Write to a map file.
3425 do_print_to_mapfile(Mapfile* mapfile) const
3426 { mapfile->print_output_data(this, "** BRLT"); }
3429 // Write out the BRLT data.
3431 do_write(Output_file*);
3433 // The reloc section.
3434 Reloc_section* rel_;
3435 Target_powerpc<size, big_endian>* targ_;
3438 // Make the branch lookup table section.
3440 template<int size, bool big_endian>
3442 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
3444 if (size == 64 && this->brlt_section_ == NULL)
3446 Reloc_section* brlt_rel = NULL;
3447 bool is_pic = parameters->options().output_is_position_independent();
3450 // When PIC we can't fill in .branch_lt (like .plt it can be
3451 // a bss style section) but must initialise at runtime via
3452 // dynamic relocats.
3453 this->rela_dyn_section(layout);
3454 brlt_rel = new Reloc_section(false);
3455 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
3458 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
3459 if (this->plt_ && is_pic)
3460 this->plt_->output_section()
3461 ->add_output_section_data(this->brlt_section_);
3463 layout->add_output_section_data(".branch_lt",
3464 (is_pic ? elfcpp::SHT_NOBITS
3465 : elfcpp::SHT_PROGBITS),
3466 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3467 this->brlt_section_,
3468 (is_pic ? ORDER_SMALL_BSS
3469 : ORDER_SMALL_DATA),
3474 // Write out .branch_lt when non-PIC.
3476 template<int size, bool big_endian>
3478 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
3480 if (size == 64 && !parameters->options().output_is_position_independent())
3482 const section_size_type offset = this->offset();
3483 const section_size_type oview_size
3484 = convert_to_section_size_type(this->data_size());
3485 unsigned char* const oview = of->get_output_view(offset, oview_size);
3487 this->targ_->write_branch_lookup_table(oview);
3488 of->write_output_view(offset, oview_size, oview);
3492 static inline uint32_t
3498 static inline uint32_t
3504 static inline uint32_t
3507 return hi(a + 0x8000);
3513 static const unsigned char eh_frame_cie[12];
3517 const unsigned char Eh_cie<size>::eh_frame_cie[] =
3520 'z', 'R', 0, // Augmentation string.
3521 4, // Code alignment.
3522 0x80 - size / 8 , // Data alignment.
3524 1, // Augmentation size.
3525 (elfcpp::DW_EH_PE_pcrel
3526 | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
3527 elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
3530 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3531 static const unsigned char glink_eh_frame_fde_64v1[] =
3533 0, 0, 0, 0, // Replaced with offset to .glink.
3534 0, 0, 0, 0, // Replaced with size of .glink.
3535 0, // Augmentation size.
3536 elfcpp::DW_CFA_advance_loc + 1,
3537 elfcpp::DW_CFA_register, 65, 12,
3538 elfcpp::DW_CFA_advance_loc + 4,
3539 elfcpp::DW_CFA_restore_extended, 65
3542 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3543 static const unsigned char glink_eh_frame_fde_64v2[] =
3545 0, 0, 0, 0, // Replaced with offset to .glink.
3546 0, 0, 0, 0, // Replaced with size of .glink.
3547 0, // Augmentation size.
3548 elfcpp::DW_CFA_advance_loc + 1,
3549 elfcpp::DW_CFA_register, 65, 0,
3550 elfcpp::DW_CFA_advance_loc + 4,
3551 elfcpp::DW_CFA_restore_extended, 65
3554 // Describe __glink_PLTresolve use of LR, 32-bit version.
3555 static const unsigned char glink_eh_frame_fde_32[] =
3557 0, 0, 0, 0, // Replaced with offset to .glink.
3558 0, 0, 0, 0, // Replaced with size of .glink.
3559 0, // Augmentation size.
3560 elfcpp::DW_CFA_advance_loc + 2,
3561 elfcpp::DW_CFA_register, 65, 0,
3562 elfcpp::DW_CFA_advance_loc + 4,
3563 elfcpp::DW_CFA_restore_extended, 65
3566 static const unsigned char default_fde[] =
3568 0, 0, 0, 0, // Replaced with offset to stubs.
3569 0, 0, 0, 0, // Replaced with size of stubs.
3570 0, // Augmentation size.
3571 elfcpp::DW_CFA_nop, // Pad.
3576 template<bool big_endian>
3578 write_insn(unsigned char* p, uint32_t v)
3580 elfcpp::Swap<32, big_endian>::writeval(p, v);
3583 // Stub_table holds information about plt and long branch stubs.
3584 // Stubs are built in an area following some input section determined
3585 // by group_sections(). This input section is converted to a relaxed
3586 // input section allowing it to be resized to accommodate the stubs
3588 template<int size, bool big_endian>
3589 class Stub_table : public Output_relaxed_input_section
3592 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3593 static const Address invalid_address = static_cast<Address>(0) - 1;
3595 Stub_table(Target_powerpc<size, big_endian>* targ,
3596 Output_section* output_section,
3597 const Output_section::Input_section* owner)
3598 : Output_relaxed_input_section(owner->relobj(), owner->shndx(),
3600 ->section_addralign(owner->shndx())),
3601 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
3602 orig_data_size_(owner->current_data_size()),
3603 plt_size_(0), last_plt_size_(0),
3604 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3605 need_save_res_(false)
3607 this->set_output_section(output_section);
3609 std::vector<Output_relaxed_input_section*> new_relaxed;
3610 new_relaxed.push_back(this);
3611 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3614 // Add a plt call stub.
3616 add_plt_call_entry(Address,
3617 const Sized_relobj_file<size, big_endian>*,
3623 add_plt_call_entry(Address,
3624 const Sized_relobj_file<size, big_endian>*,
3629 // Find a given plt call stub.
3631 find_plt_call_entry(const Symbol*) const;
3634 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3635 unsigned int) const;
3638 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3644 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3649 // Add a long branch stub.
3651 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3652 unsigned int, Address, Address, bool);
3655 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3659 can_reach_stub(Address from, unsigned int off, unsigned int r_type)
3661 Address max_branch_offset = max_branch_delta(r_type);
3662 if (max_branch_offset == 0)
3664 gold_assert(from != invalid_address);
3665 Address loc = off + this->stub_address();
3666 return loc - from + max_branch_offset < 2 * max_branch_offset;
3670 clear_stubs(bool all)
3672 this->plt_call_stubs_.clear();
3673 this->plt_size_ = 0;
3674 this->long_branch_stubs_.clear();
3675 this->branch_size_ = 0;
3676 this->need_save_res_ = false;
3679 this->last_plt_size_ = 0;
3680 this->last_branch_size_ = 0;
3685 set_address_and_size(const Output_section* os, Address off)
3687 Address start_off = off;
3688 off += this->orig_data_size_;
3689 Address my_size = this->plt_size_ + this->branch_size_;
3690 if (this->need_save_res_)
3691 my_size += this->targ_->savres_section()->data_size();
3693 off = align_address(off, this->stub_align());
3694 // Include original section size and alignment padding in size
3695 my_size += off - start_off;
3696 this->reset_address_and_file_offset();
3697 this->set_current_data_size(my_size);
3698 this->set_address_and_file_offset(os->address() + start_off,
3699 os->offset() + start_off);
3704 stub_address() const
3706 return align_address(this->address() + this->orig_data_size_,
3707 this->stub_align());
3713 return align_address(this->offset() + this->orig_data_size_,
3714 this->stub_align());
3719 { return this->plt_size_; }
3724 Output_section* os = this->output_section();
3725 if (os->addralign() < this->stub_align())
3727 os->set_addralign(this->stub_align());
3728 // FIXME: get rid of the insane checkpointing.
3729 // We can't increase alignment of the input section to which
3730 // stubs are attached; The input section may be .init which
3731 // is pasted together with other .init sections to form a
3732 // function. Aligning might insert zero padding resulting in
3733 // sigill. However we do need to increase alignment of the
3734 // output section so that the align_address() on offset in
3735 // set_address_and_size() adds the same padding as the
3736 // align_address() on address in stub_address().
3737 // What's more, we need this alignment for the layout done in
3738 // relaxation_loop_body() so that the output section starts at
3739 // a suitably aligned address.
3740 os->checkpoint_set_addralign(this->stub_align());
3742 if (this->last_plt_size_ != this->plt_size_
3743 || this->last_branch_size_ != this->branch_size_)
3745 this->last_plt_size_ = this->plt_size_;
3746 this->last_branch_size_ = this->branch_size_;
3752 // Add .eh_frame info for this stub section. Unlike other linker
3753 // generated .eh_frame this is added late in the link, because we
3754 // only want the .eh_frame info if this particular stub section is
3757 add_eh_frame(Layout* layout)
3759 if (!this->eh_frame_added_)
3761 if (!parameters->options().ld_generated_unwind_info())
3764 // Since we add stub .eh_frame info late, it must be placed
3765 // after all other linker generated .eh_frame info so that
3766 // merge mapping need not be updated for input sections.
3767 // There is no provision to use a different CIE to that used
3769 if (!this->targ_->has_glink())
3772 layout->add_eh_frame_for_plt(this,
3773 Eh_cie<size>::eh_frame_cie,
3774 sizeof (Eh_cie<size>::eh_frame_cie),
3776 sizeof (default_fde));
3777 this->eh_frame_added_ = true;
3781 Target_powerpc<size, big_endian>*
3787 class Plt_stub_ent_hash;
3788 typedef Unordered_map<Plt_stub_ent, unsigned int,
3789 Plt_stub_ent_hash> Plt_stub_entries;
3791 // Alignment of stub section.
3797 unsigned int min_align = 32;
3798 unsigned int user_align = 1 << parameters->options().plt_align();
3799 return std::max(user_align, min_align);
3802 // Return the plt offset for the given call stub.
3804 plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const
3806 const Symbol* gsym = p->first.sym_;
3809 *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC
3810 && gsym->can_use_relative_reloc(false));
3811 return gsym->plt_offset();
3816 const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
3817 unsigned int local_sym_index = p->first.locsym_;
3818 return relobj->local_plt_offset(local_sym_index);
3822 // Size of a given plt call stub.
3824 plt_call_size(typename Plt_stub_entries::const_iterator p) const
3830 Address plt_addr = this->plt_off(p, &is_iplt);
3832 plt_addr += this->targ_->iplt_section()->address();
3834 plt_addr += this->targ_->plt_section()->address();
3835 Address got_addr = this->targ_->got_section()->output_section()->address();
3836 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3837 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
3838 got_addr += ppcobj->toc_base_offset();
3839 Address off = plt_addr - got_addr;
3840 unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0);
3841 if (this->targ_->abiversion() < 2)
3843 bool static_chain = parameters->options().plt_static_chain();
3844 bool thread_safe = this->targ_->plt_thread_safe();
3848 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
3850 unsigned int align = 1 << parameters->options().plt_align();
3852 bytes = (bytes + align - 1) & -align;
3856 // Return long branch stub size.
3858 branch_stub_size(Address to)
3861 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
3862 if (to - loc + (1 << 25) < 2 << 25)
3864 if (size == 64 || !parameters->options().output_is_position_independent())
3871 do_write(Output_file*);
3873 // Plt call stub keys.
3877 Plt_stub_ent(const Symbol* sym)
3878 : sym_(sym), object_(0), addend_(0), locsym_(0)
3881 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3882 unsigned int locsym_index)
3883 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3886 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3888 unsigned int r_type,
3890 : sym_(sym), object_(0), addend_(0), locsym_(0)
3893 this->addend_ = addend;
3894 else if (parameters->options().output_is_position_independent()
3895 && r_type == elfcpp::R_PPC_PLTREL24)
3897 this->addend_ = addend;
3898 if (this->addend_ >= 32768)
3899 this->object_ = object;
3903 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3904 unsigned int locsym_index,
3905 unsigned int r_type,
3907 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3910 this->addend_ = addend;
3911 else if (parameters->options().output_is_position_independent()
3912 && r_type == elfcpp::R_PPC_PLTREL24)
3913 this->addend_ = addend;
3916 bool operator==(const Plt_stub_ent& that) const
3918 return (this->sym_ == that.sym_
3919 && this->object_ == that.object_
3920 && this->addend_ == that.addend_
3921 && this->locsym_ == that.locsym_);
3925 const Sized_relobj_file<size, big_endian>* object_;
3926 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
3927 unsigned int locsym_;
3930 class Plt_stub_ent_hash
3933 size_t operator()(const Plt_stub_ent& ent) const
3935 return (reinterpret_cast<uintptr_t>(ent.sym_)
3936 ^ reinterpret_cast<uintptr_t>(ent.object_)
3942 // Long branch stub keys.
3943 class Branch_stub_ent
3946 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj,
3947 Address to, bool save_res)
3948 : dest_(to), toc_base_off_(0), save_res_(save_res)
3951 toc_base_off_ = obj->toc_base_offset();
3954 bool operator==(const Branch_stub_ent& that) const
3956 return (this->dest_ == that.dest_
3958 || this->toc_base_off_ == that.toc_base_off_));
3962 unsigned int toc_base_off_;
3966 class Branch_stub_ent_hash
3969 size_t operator()(const Branch_stub_ent& ent) const
3970 { return ent.dest_ ^ ent.toc_base_off_; }
3973 // In a sane world this would be a global.
3974 Target_powerpc<size, big_endian>* targ_;
3975 // Map sym/object/addend to stub offset.
3976 Plt_stub_entries plt_call_stubs_;
3977 // Map destination address to stub offset.
3978 typedef Unordered_map<Branch_stub_ent, unsigned int,
3979 Branch_stub_ent_hash> Branch_stub_entries;
3980 Branch_stub_entries long_branch_stubs_;
3981 // size of input section
3982 section_size_type orig_data_size_;
3984 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
3985 // Whether .eh_frame info has been created for this stub section.
3986 bool eh_frame_added_;
3987 // Set if this stub group needs a copy of out-of-line register
3988 // save/restore functions.
3989 bool need_save_res_;
3992 // Add a plt call stub, if we do not already have one for this
3993 // sym/object/addend combo.
3995 template<int size, bool big_endian>
3997 Stub_table<size, big_endian>::add_plt_call_entry(
3999 const Sized_relobj_file<size, big_endian>* object,
4001 unsigned int r_type,
4004 Plt_stub_ent ent(object, gsym, r_type, addend);
4005 unsigned int off = this->plt_size_;
4006 std::pair<typename Plt_stub_entries::iterator, bool> p
4007 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
4009 this->plt_size_ = off + this->plt_call_size(p.first);
4010 return this->can_reach_stub(from, off, r_type);
4013 template<int size, bool big_endian>
4015 Stub_table<size, big_endian>::add_plt_call_entry(
4017 const Sized_relobj_file<size, big_endian>* object,
4018 unsigned int locsym_index,
4019 unsigned int r_type,
4022 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4023 unsigned int off = this->plt_size_;
4024 std::pair<typename Plt_stub_entries::iterator, bool> p
4025 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
4027 this->plt_size_ = off + this->plt_call_size(p.first);
4028 return this->can_reach_stub(from, off, r_type);
4031 // Find a plt call stub.
4033 template<int size, bool big_endian>
4034 typename Stub_table<size, big_endian>::Address
4035 Stub_table<size, big_endian>::find_plt_call_entry(
4036 const Sized_relobj_file<size, big_endian>* object,
4038 unsigned int r_type,
4039 Address addend) const
4041 Plt_stub_ent ent(object, gsym, r_type, addend);
4042 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4043 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4046 template<int size, bool big_endian>
4047 typename Stub_table<size, big_endian>::Address
4048 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
4050 Plt_stub_ent ent(gsym);
4051 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4052 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4055 template<int size, bool big_endian>
4056 typename Stub_table<size, big_endian>::Address
4057 Stub_table<size, big_endian>::find_plt_call_entry(
4058 const Sized_relobj_file<size, big_endian>* object,
4059 unsigned int locsym_index,
4060 unsigned int r_type,
4061 Address addend) const
4063 Plt_stub_ent ent(object, locsym_index, r_type, addend);
4064 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4065 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4068 template<int size, bool big_endian>
4069 typename Stub_table<size, big_endian>::Address
4070 Stub_table<size, big_endian>::find_plt_call_entry(
4071 const Sized_relobj_file<size, big_endian>* object,
4072 unsigned int locsym_index) const
4074 Plt_stub_ent ent(object, locsym_index);
4075 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
4076 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
4079 // Add a long branch stub if we don't already have one to given
4082 template<int size, bool big_endian>
4084 Stub_table<size, big_endian>::add_long_branch_entry(
4085 const Powerpc_relobj<size, big_endian>* object,
4086 unsigned int r_type,
4091 Branch_stub_ent ent(object, to, save_res);
4092 Address off = this->branch_size_;
4093 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
4096 this->need_save_res_ = true;
4099 unsigned int stub_size = this->branch_stub_size(to);
4100 this->branch_size_ = off + stub_size;
4101 if (size == 64 && stub_size != 4)
4102 this->targ_->add_branch_lookup_table(to);
4105 return this->can_reach_stub(from, off, r_type);
4108 // Find long branch stub offset.
4110 template<int size, bool big_endian>
4111 typename Stub_table<size, big_endian>::Address
4112 Stub_table<size, big_endian>::find_long_branch_entry(
4113 const Powerpc_relobj<size, big_endian>* object,
4116 Branch_stub_ent ent(object, to, false);
4117 typename Branch_stub_entries::const_iterator p
4118 = this->long_branch_stubs_.find(ent);
4119 if (p == this->long_branch_stubs_.end())
4120 return invalid_address;
4121 if (p->first.save_res_)
4122 return to - this->targ_->savres_section()->address() + this->branch_size_;
4126 // A class to handle .glink.
4128 template<int size, bool big_endian>
4129 class Output_data_glink : public Output_section_data
4132 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4133 static const Address invalid_address = static_cast<Address>(0) - 1;
4134 static const int pltresolve_size = 16*4;
4136 Output_data_glink(Target_powerpc<size, big_endian>* targ)
4137 : Output_section_data(16), targ_(targ), global_entry_stubs_(),
4138 end_branch_table_(), ge_size_(0)
4142 add_eh_frame(Layout* layout);
4145 add_global_entry(const Symbol*);
4148 find_global_entry(const Symbol*) const;
4151 global_entry_address() const
4153 gold_assert(this->is_data_size_valid());
4154 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4155 return this->address() + global_entry_off;
4159 // Write to a map file.
4161 do_print_to_mapfile(Mapfile* mapfile) const
4162 { mapfile->print_output_data(this, _("** glink")); }
4166 set_final_data_size();
4170 do_write(Output_file*);
4172 // Allows access to .got and .plt for do_write.
4173 Target_powerpc<size, big_endian>* targ_;
4175 // Map sym to stub offset.
4176 typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries;
4177 Global_entry_stub_entries global_entry_stubs_;
4179 unsigned int end_branch_table_, ge_size_;
4182 template<int size, bool big_endian>
4184 Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout)
4186 if (!parameters->options().ld_generated_unwind_info())
4191 if (this->targ_->abiversion() < 2)
4192 layout->add_eh_frame_for_plt(this,
4193 Eh_cie<64>::eh_frame_cie,
4194 sizeof (Eh_cie<64>::eh_frame_cie),
4195 glink_eh_frame_fde_64v1,
4196 sizeof (glink_eh_frame_fde_64v1));
4198 layout->add_eh_frame_for_plt(this,
4199 Eh_cie<64>::eh_frame_cie,
4200 sizeof (Eh_cie<64>::eh_frame_cie),
4201 glink_eh_frame_fde_64v2,
4202 sizeof (glink_eh_frame_fde_64v2));
4206 // 32-bit .glink can use the default since the CIE return
4207 // address reg, LR, is valid.
4208 layout->add_eh_frame_for_plt(this,
4209 Eh_cie<32>::eh_frame_cie,
4210 sizeof (Eh_cie<32>::eh_frame_cie),
4212 sizeof (default_fde));
4213 // Except where LR is used in a PIC __glink_PLTresolve.
4214 if (parameters->options().output_is_position_independent())
4215 layout->add_eh_frame_for_plt(this,
4216 Eh_cie<32>::eh_frame_cie,
4217 sizeof (Eh_cie<32>::eh_frame_cie),
4218 glink_eh_frame_fde_32,
4219 sizeof (glink_eh_frame_fde_32));
4223 template<int size, bool big_endian>
4225 Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym)
4227 std::pair<typename Global_entry_stub_entries::iterator, bool> p
4228 = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_));
4230 this->ge_size_ += 16;
4233 template<int size, bool big_endian>
4234 typename Output_data_glink<size, big_endian>::Address
4235 Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const
4237 typename Global_entry_stub_entries::const_iterator p
4238 = this->global_entry_stubs_.find(gsym);
4239 return p == this->global_entry_stubs_.end() ? invalid_address : p->second;
4242 template<int size, bool big_endian>
4244 Output_data_glink<size, big_endian>::set_final_data_size()
4246 unsigned int count = this->targ_->plt_entry_count();
4247 section_size_type total = 0;
4253 // space for branch table
4254 total += 4 * (count - 1);
4256 total += -total & 15;
4257 total += this->pltresolve_size;
4261 total += this->pltresolve_size;
4263 // space for branch table
4265 if (this->targ_->abiversion() < 2)
4269 total += 4 * (count - 0x8000);
4273 this->end_branch_table_ = total;
4274 total = (total + 15) & -16;
4275 total += this->ge_size_;
4277 this->set_data_size(total);
4280 // Write out plt and long branch stub code.
4282 template<int size, bool big_endian>
4284 Stub_table<size, big_endian>::do_write(Output_file* of)
4286 if (this->plt_call_stubs_.empty()
4287 && this->long_branch_stubs_.empty())
4290 const section_size_type start_off = this->offset();
4291 const section_size_type off = this->stub_offset();
4292 const section_size_type oview_size =
4293 convert_to_section_size_type(this->data_size() - (off - start_off));
4294 unsigned char* const oview = of->get_output_view(off, oview_size);
4299 const Output_data_got_powerpc<size, big_endian>* got
4300 = this->targ_->got_section();
4301 Address got_os_addr = got->output_section()->address();
4303 if (!this->plt_call_stubs_.empty())
4305 // The base address of the .plt section.
4306 Address plt_base = this->targ_->plt_section()->address();
4307 Address iplt_base = invalid_address;
4309 // Write out plt call stubs.
4310 typename Plt_stub_entries::const_iterator cs;
4311 for (cs = this->plt_call_stubs_.begin();
4312 cs != this->plt_call_stubs_.end();
4316 Address pltoff = this->plt_off(cs, &is_iplt);
4317 Address plt_addr = pltoff;
4320 if (iplt_base == invalid_address)
4321 iplt_base = this->targ_->iplt_section()->address();
4322 plt_addr += iplt_base;
4325 plt_addr += plt_base;
4326 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
4327 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
4328 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
4329 Address off = plt_addr - got_addr;
4331 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
4332 gold_error(_("%s: linkage table error against `%s'"),
4333 cs->first.object_->name().c_str(),
4334 cs->first.sym_->demangled_name().c_str());
4336 bool plt_load_toc = this->targ_->abiversion() < 2;
4338 = plt_load_toc && parameters->options().plt_static_chain();
4340 = plt_load_toc && this->targ_->plt_thread_safe();
4341 bool use_fake_dep = false;
4342 Address cmp_branch_off = 0;
4345 unsigned int pltindex
4346 = ((pltoff - this->targ_->first_plt_entry_offset())
4347 / this->targ_->plt_entry_size());
4349 = (this->targ_->glink_section()->pltresolve_size
4351 if (pltindex > 32768)
4352 glinkoff += (pltindex - 32768) * 4;
4354 = this->targ_->glink_section()->address() + glinkoff;
4356 = (this->stub_address() + cs->second + 24
4357 + 4 * (ha(off) != 0)
4358 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
4359 + 4 * static_chain);
4360 cmp_branch_off = to - from;
4361 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
4364 p = oview + cs->second;
4367 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4371 write_insn<big_endian>(p, addis_11_2 + ha(off));
4373 write_insn<big_endian>(p, ld_12_11 + l(off));
4378 write_insn<big_endian>(p, addis_12_2 + ha(off));
4380 write_insn<big_endian>(p, ld_12_12 + l(off));
4384 && ha(off + 8 + 8 * static_chain) != ha(off))
4386 write_insn<big_endian>(p, addi_11_11 + l(off));
4390 write_insn<big_endian>(p, mtctr_12);
4396 write_insn<big_endian>(p, xor_2_12_12);
4398 write_insn<big_endian>(p, add_11_11_2);
4401 write_insn<big_endian>(p, ld_2_11 + l(off + 8));
4405 write_insn<big_endian>(p, ld_11_11 + l(off + 16));
4412 write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
4414 write_insn<big_endian>(p, ld_12_2 + l(off));
4417 && ha(off + 8 + 8 * static_chain) != ha(off))
4419 write_insn<big_endian>(p, addi_2_2 + l(off));
4423 write_insn<big_endian>(p, mtctr_12);
4429 write_insn<big_endian>(p, xor_11_12_12);
4431 write_insn<big_endian>(p, add_2_2_11);
4436 write_insn<big_endian>(p, ld_11_2 + l(off + 16));
4439 write_insn<big_endian>(p, ld_2_2 + l(off + 8));
4443 if (thread_safe && !use_fake_dep)
4445 write_insn<big_endian>(p, cmpldi_2_0);
4447 write_insn<big_endian>(p, bnectr_p4);
4449 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
4452 write_insn<big_endian>(p, bctr);
4456 // Write out long branch stubs.
4457 typename Branch_stub_entries::const_iterator bs;
4458 for (bs = this->long_branch_stubs_.begin();
4459 bs != this->long_branch_stubs_.end();
4462 if (bs->first.save_res_)
4464 p = oview + this->plt_size_ + bs->second;
4465 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4466 Address delta = bs->first.dest_ - loc;
4467 if (delta + (1 << 25) < 2 << 25)
4468 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4472 = this->targ_->find_branch_lookup_table(bs->first.dest_);
4473 gold_assert(brlt_addr != invalid_address);
4474 brlt_addr += this->targ_->brlt_section()->address();
4475 Address got_addr = got_os_addr + bs->first.toc_base_off_;
4476 Address brltoff = brlt_addr - got_addr;
4477 if (ha(brltoff) == 0)
4479 write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4;
4483 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
4484 write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4;
4486 write_insn<big_endian>(p, mtctr_12), p += 4;
4487 write_insn<big_endian>(p, bctr);
4493 if (!this->plt_call_stubs_.empty())
4495 // The base address of the .plt section.
4496 Address plt_base = this->targ_->plt_section()->address();
4497 Address iplt_base = invalid_address;
4498 // The address of _GLOBAL_OFFSET_TABLE_.
4499 Address g_o_t = invalid_address;
4501 // Write out plt call stubs.
4502 typename Plt_stub_entries::const_iterator cs;
4503 for (cs = this->plt_call_stubs_.begin();
4504 cs != this->plt_call_stubs_.end();
4508 Address plt_addr = this->plt_off(cs, &is_iplt);
4511 if (iplt_base == invalid_address)
4512 iplt_base = this->targ_->iplt_section()->address();
4513 plt_addr += iplt_base;
4516 plt_addr += plt_base;
4518 p = oview + cs->second;
4519 if (parameters->options().output_is_position_independent())
4522 const Powerpc_relobj<size, big_endian>* ppcobj
4523 = (static_cast<const Powerpc_relobj<size, big_endian>*>
4524 (cs->first.object_));
4525 if (ppcobj != NULL && cs->first.addend_ >= 32768)
4527 unsigned int got2 = ppcobj->got2_shndx();
4528 got_addr = ppcobj->get_output_section_offset(got2);
4529 gold_assert(got_addr != invalid_address);
4530 got_addr += (ppcobj->output_section(got2)->address()
4531 + cs->first.addend_);
4535 if (g_o_t == invalid_address)
4537 const Output_data_got_powerpc<size, big_endian>* got
4538 = this->targ_->got_section();
4539 g_o_t = got->address() + got->g_o_t();
4544 Address off = plt_addr - got_addr;
4547 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
4548 write_insn<big_endian>(p + 4, mtctr_11);
4549 write_insn<big_endian>(p + 8, bctr);
4553 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
4554 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
4555 write_insn<big_endian>(p + 8, mtctr_11);
4556 write_insn<big_endian>(p + 12, bctr);
4561 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
4562 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
4563 write_insn<big_endian>(p + 8, mtctr_11);
4564 write_insn<big_endian>(p + 12, bctr);
4569 // Write out long branch stubs.
4570 typename Branch_stub_entries::const_iterator bs;
4571 for (bs = this->long_branch_stubs_.begin();
4572 bs != this->long_branch_stubs_.end();
4575 if (bs->first.save_res_)
4577 p = oview + this->plt_size_ + bs->second;
4578 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4579 Address delta = bs->first.dest_ - loc;
4580 if (delta + (1 << 25) < 2 << 25)
4581 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4582 else if (!parameters->options().output_is_position_independent())
4584 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
4585 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
4586 write_insn<big_endian>(p + 8, mtctr_12);
4587 write_insn<big_endian>(p + 12, bctr);
4592 write_insn<big_endian>(p + 0, mflr_0);
4593 write_insn<big_endian>(p + 4, bcl_20_31);
4594 write_insn<big_endian>(p + 8, mflr_12);
4595 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
4596 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
4597 write_insn<big_endian>(p + 20, mtlr_0);
4598 write_insn<big_endian>(p + 24, mtctr_12);
4599 write_insn<big_endian>(p + 28, bctr);
4603 if (this->need_save_res_)
4605 p = oview + this->plt_size_ + this->branch_size_;
4606 memcpy (p, this->targ_->savres_section()->contents(),
4607 this->targ_->savres_section()->data_size());
4611 // Write out .glink.
4613 template<int size, bool big_endian>
4615 Output_data_glink<size, big_endian>::do_write(Output_file* of)
4617 const section_size_type off = this->offset();
4618 const section_size_type oview_size =
4619 convert_to_section_size_type(this->data_size());
4620 unsigned char* const oview = of->get_output_view(off, oview_size);
4623 // The base address of the .plt section.
4624 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4625 Address plt_base = this->targ_->plt_section()->address();
4629 if (this->end_branch_table_ != 0)
4631 // Write pltresolve stub.
4633 Address after_bcl = this->address() + 16;
4634 Address pltoff = plt_base - after_bcl;
4636 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
4638 if (this->targ_->abiversion() < 2)
4640 write_insn<big_endian>(p, mflr_12), p += 4;
4641 write_insn<big_endian>(p, bcl_20_31), p += 4;
4642 write_insn<big_endian>(p, mflr_11), p += 4;
4643 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4644 write_insn<big_endian>(p, mtlr_12), p += 4;
4645 write_insn<big_endian>(p, add_11_2_11), p += 4;
4646 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4647 write_insn<big_endian>(p, ld_2_11 + 8), p += 4;
4648 write_insn<big_endian>(p, mtctr_12), p += 4;
4649 write_insn<big_endian>(p, ld_11_11 + 16), p += 4;
4653 write_insn<big_endian>(p, mflr_0), p += 4;
4654 write_insn<big_endian>(p, bcl_20_31), p += 4;
4655 write_insn<big_endian>(p, mflr_11), p += 4;
4656 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4657 write_insn<big_endian>(p, mtlr_0), p += 4;
4658 write_insn<big_endian>(p, sub_12_12_11), p += 4;
4659 write_insn<big_endian>(p, add_11_2_11), p += 4;
4660 write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4;
4661 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
4662 write_insn<big_endian>(p, srdi_0_0_2), p += 4;
4663 write_insn<big_endian>(p, mtctr_12), p += 4;
4664 write_insn<big_endian>(p, ld_11_11 + 8), p += 4;
4666 write_insn<big_endian>(p, bctr), p += 4;
4667 while (p < oview + this->pltresolve_size)
4668 write_insn<big_endian>(p, nop), p += 4;
4670 // Write lazy link call stubs.
4672 while (p < oview + this->end_branch_table_)
4674 if (this->targ_->abiversion() < 2)
4678 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
4682 write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4;
4683 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
4686 uint32_t branch_off = 8 - (p - oview);
4687 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
4692 Address plt_base = this->targ_->plt_section()->address();
4693 Address iplt_base = invalid_address;
4694 unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16;
4695 Address global_entry_base = this->address() + global_entry_off;
4696 typename Global_entry_stub_entries::const_iterator ge;
4697 for (ge = this->global_entry_stubs_.begin();
4698 ge != this->global_entry_stubs_.end();
4701 p = oview + global_entry_off + ge->second;
4702 Address plt_addr = ge->first->plt_offset();
4703 if (ge->first->type() == elfcpp::STT_GNU_IFUNC
4704 && ge->first->can_use_relative_reloc(false))
4706 if (iplt_base == invalid_address)
4707 iplt_base = this->targ_->iplt_section()->address();
4708 plt_addr += iplt_base;
4711 plt_addr += plt_base;
4712 Address my_addr = global_entry_base + ge->second;
4713 Address off = plt_addr - my_addr;
4715 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
4716 gold_error(_("%s: linkage table error against `%s'"),
4717 ge->first->object()->name().c_str(),
4718 ge->first->demangled_name().c_str());
4720 write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4;
4721 write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4;
4722 write_insn<big_endian>(p, mtctr_12), p += 4;
4723 write_insn<big_endian>(p, bctr);
4728 const Output_data_got_powerpc<size, big_endian>* got
4729 = this->targ_->got_section();
4730 // The address of _GLOBAL_OFFSET_TABLE_.
4731 Address g_o_t = got->address() + got->g_o_t();
4733 // Write out pltresolve branch table.
4735 unsigned int the_end = oview_size - this->pltresolve_size;
4736 unsigned char* end_p = oview + the_end;
4737 while (p < end_p - 8 * 4)
4738 write_insn<big_endian>(p, b + end_p - p), p += 4;
4740 write_insn<big_endian>(p, nop), p += 4;
4742 // Write out pltresolve call stub.
4743 if (parameters->options().output_is_position_independent())
4745 Address res0_off = 0;
4746 Address after_bcl_off = the_end + 12;
4747 Address bcl_res0 = after_bcl_off - res0_off;
4749 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
4750 write_insn<big_endian>(p + 4, mflr_0);
4751 write_insn<big_endian>(p + 8, bcl_20_31);
4752 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
4753 write_insn<big_endian>(p + 16, mflr_12);
4754 write_insn<big_endian>(p + 20, mtlr_0);
4755 write_insn<big_endian>(p + 24, sub_11_11_12);
4757 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
4759 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
4760 if (ha(got_bcl) == ha(got_bcl + 4))
4762 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
4763 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
4767 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
4768 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
4770 write_insn<big_endian>(p + 40, mtctr_0);
4771 write_insn<big_endian>(p + 44, add_0_11_11);
4772 write_insn<big_endian>(p + 48, add_11_0_11);
4773 write_insn<big_endian>(p + 52, bctr);
4774 write_insn<big_endian>(p + 56, nop);
4775 write_insn<big_endian>(p + 60, nop);
4779 Address res0 = this->address();
4781 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
4782 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
4783 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4784 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
4786 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
4787 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
4788 write_insn<big_endian>(p + 16, mtctr_0);
4789 write_insn<big_endian>(p + 20, add_0_11_11);
4790 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4791 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
4793 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
4794 write_insn<big_endian>(p + 28, add_11_0_11);
4795 write_insn<big_endian>(p + 32, bctr);
4796 write_insn<big_endian>(p + 36, nop);
4797 write_insn<big_endian>(p + 40, nop);
4798 write_insn<big_endian>(p + 44, nop);
4799 write_insn<big_endian>(p + 48, nop);
4800 write_insn<big_endian>(p + 52, nop);
4801 write_insn<big_endian>(p + 56, nop);
4802 write_insn<big_endian>(p + 60, nop);
4807 of->write_output_view(off, oview_size, oview);
4811 // A class to handle linker generated save/restore functions.
4813 template<int size, bool big_endian>
4814 class Output_data_save_res : public Output_section_data_build
4817 Output_data_save_res(Symbol_table* symtab);
4819 const unsigned char*
4826 // Write to a map file.
4828 do_print_to_mapfile(Mapfile* mapfile) const
4829 { mapfile->print_output_data(this, _("** save/restore")); }
4832 do_write(Output_file*);
4835 // The maximum size of save/restore contents.
4836 static const unsigned int savres_max = 218*4;
4839 savres_define(Symbol_table* symtab,
4841 unsigned int lo, unsigned int hi,
4842 unsigned char* write_ent(unsigned char*, int),
4843 unsigned char* write_tail(unsigned char*, int));
4845 unsigned char *contents_;
4848 template<bool big_endian>
4849 static unsigned char*
4850 savegpr0(unsigned char* p, int r)
4852 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4853 write_insn<big_endian>(p, insn);
4857 template<bool big_endian>
4858 static unsigned char*
4859 savegpr0_tail(unsigned char* p, int r)
4861 p = savegpr0<big_endian>(p, r);
4862 uint32_t insn = std_0_1 + 16;
4863 write_insn<big_endian>(p, insn);
4865 write_insn<big_endian>(p, blr);
4869 template<bool big_endian>
4870 static unsigned char*
4871 restgpr0(unsigned char* p, int r)
4873 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4874 write_insn<big_endian>(p, insn);
4878 template<bool big_endian>
4879 static unsigned char*
4880 restgpr0_tail(unsigned char* p, int r)
4882 uint32_t insn = ld_0_1 + 16;
4883 write_insn<big_endian>(p, insn);
4885 p = restgpr0<big_endian>(p, r);
4886 write_insn<big_endian>(p, mtlr_0);
4890 p = restgpr0<big_endian>(p, 30);
4891 p = restgpr0<big_endian>(p, 31);
4893 write_insn<big_endian>(p, blr);
4897 template<bool big_endian>
4898 static unsigned char*
4899 savegpr1(unsigned char* p, int r)
4901 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4902 write_insn<big_endian>(p, insn);
4906 template<bool big_endian>
4907 static unsigned char*
4908 savegpr1_tail(unsigned char* p, int r)
4910 p = savegpr1<big_endian>(p, r);
4911 write_insn<big_endian>(p, blr);
4915 template<bool big_endian>
4916 static unsigned char*
4917 restgpr1(unsigned char* p, int r)
4919 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4920 write_insn<big_endian>(p, insn);
4924 template<bool big_endian>
4925 static unsigned char*
4926 restgpr1_tail(unsigned char* p, int r)
4928 p = restgpr1<big_endian>(p, r);
4929 write_insn<big_endian>(p, blr);
4933 template<bool big_endian>
4934 static unsigned char*
4935 savefpr(unsigned char* p, int r)
4937 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4938 write_insn<big_endian>(p, insn);
4942 template<bool big_endian>
4943 static unsigned char*
4944 savefpr0_tail(unsigned char* p, int r)
4946 p = savefpr<big_endian>(p, r);
4947 write_insn<big_endian>(p, std_0_1 + 16);
4949 write_insn<big_endian>(p, blr);
4953 template<bool big_endian>
4954 static unsigned char*
4955 restfpr(unsigned char* p, int r)
4957 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4958 write_insn<big_endian>(p, insn);
4962 template<bool big_endian>
4963 static unsigned char*
4964 restfpr0_tail(unsigned char* p, int r)
4966 write_insn<big_endian>(p, ld_0_1 + 16);
4968 p = restfpr<big_endian>(p, r);
4969 write_insn<big_endian>(p, mtlr_0);
4973 p = restfpr<big_endian>(p, 30);
4974 p = restfpr<big_endian>(p, 31);
4976 write_insn<big_endian>(p, blr);
4980 template<bool big_endian>
4981 static unsigned char*
4982 savefpr1_tail(unsigned char* p, int r)
4984 p = savefpr<big_endian>(p, r);
4985 write_insn<big_endian>(p, blr);
4989 template<bool big_endian>
4990 static unsigned char*
4991 restfpr1_tail(unsigned char* p, int r)
4993 p = restfpr<big_endian>(p, r);
4994 write_insn<big_endian>(p, blr);
4998 template<bool big_endian>
4999 static unsigned char*
5000 savevr(unsigned char* p, int r)
5002 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5003 write_insn<big_endian>(p, insn);
5005 insn = stvx_0_12_0 + (r << 21);
5006 write_insn<big_endian>(p, insn);
5010 template<bool big_endian>
5011 static unsigned char*
5012 savevr_tail(unsigned char* p, int r)
5014 p = savevr<big_endian>(p, r);
5015 write_insn<big_endian>(p, blr);
5019 template<bool big_endian>
5020 static unsigned char*
5021 restvr(unsigned char* p, int r)
5023 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5024 write_insn<big_endian>(p, insn);
5026 insn = lvx_0_12_0 + (r << 21);
5027 write_insn<big_endian>(p, insn);
5031 template<bool big_endian>
5032 static unsigned char*
5033 restvr_tail(unsigned char* p, int r)
5035 p = restvr<big_endian>(p, r);
5036 write_insn<big_endian>(p, blr);
5041 template<int size, bool big_endian>
5042 Output_data_save_res<size, big_endian>::Output_data_save_res(
5043 Symbol_table* symtab)
5044 : Output_section_data_build(4),
5047 this->savres_define(symtab,
5048 "_savegpr0_", 14, 31,
5049 savegpr0<big_endian>, savegpr0_tail<big_endian>);
5050 this->savres_define(symtab,
5051 "_restgpr0_", 14, 29,
5052 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5053 this->savres_define(symtab,
5054 "_restgpr0_", 30, 31,
5055 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5056 this->savres_define(symtab,
5057 "_savegpr1_", 14, 31,
5058 savegpr1<big_endian>, savegpr1_tail<big_endian>);
5059 this->savres_define(symtab,
5060 "_restgpr1_", 14, 31,
5061 restgpr1<big_endian>, restgpr1_tail<big_endian>);
5062 this->savres_define(symtab,
5063 "_savefpr_", 14, 31,
5064 savefpr<big_endian>, savefpr0_tail<big_endian>);
5065 this->savres_define(symtab,
5066 "_restfpr_", 14, 29,
5067 restfpr<big_endian>, restfpr0_tail<big_endian>);
5068 this->savres_define(symtab,
5069 "_restfpr_", 30, 31,
5070 restfpr<big_endian>, restfpr0_tail<big_endian>);
5071 this->savres_define(symtab,
5073 savefpr<big_endian>, savefpr1_tail<big_endian>);
5074 this->savres_define(symtab,
5076 restfpr<big_endian>, restfpr1_tail<big_endian>);
5077 this->savres_define(symtab,
5079 savevr<big_endian>, savevr_tail<big_endian>);
5080 this->savres_define(symtab,
5082 restvr<big_endian>, restvr_tail<big_endian>);
5085 template<int size, bool big_endian>
5087 Output_data_save_res<size, big_endian>::savres_define(
5088 Symbol_table* symtab,
5090 unsigned int lo, unsigned int hi,
5091 unsigned char* write_ent(unsigned char*, int),
5092 unsigned char* write_tail(unsigned char*, int))
5094 size_t len = strlen(name);
5095 bool writing = false;
5098 memcpy(sym, name, len);
5101 for (unsigned int i = lo; i <= hi; i++)
5103 sym[len + 0] = i / 10 + '0';
5104 sym[len + 1] = i % 10 + '0';
5105 Symbol* gsym = symtab->lookup(sym);
5106 bool refd = gsym != NULL && gsym->is_undefined();
5107 writing = writing || refd;
5110 if (this->contents_ == NULL)
5111 this->contents_ = new unsigned char[this->savres_max];
5113 section_size_type value = this->current_data_size();
5114 unsigned char* p = this->contents_ + value;
5116 p = write_ent(p, i);
5118 p = write_tail(p, i);
5119 section_size_type cur_size = p - this->contents_;
5120 this->set_current_data_size(cur_size);
5122 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
5123 this, value, cur_size - value,
5124 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
5125 elfcpp::STV_HIDDEN, 0, false, false);
5130 // Write out save/restore.
5132 template<int size, bool big_endian>
5134 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
5136 const section_size_type off = this->offset();
5137 const section_size_type oview_size =
5138 convert_to_section_size_type(this->data_size());
5139 unsigned char* const oview = of->get_output_view(off, oview_size);
5140 memcpy(oview, this->contents_, oview_size);
5141 of->write_output_view(off, oview_size, oview);
5145 // Create the glink section.
5147 template<int size, bool big_endian>
5149 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
5151 if (this->glink_ == NULL)
5153 this->glink_ = new Output_data_glink<size, big_endian>(this);
5154 this->glink_->add_eh_frame(layout);
5155 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5156 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5157 this->glink_, ORDER_TEXT, false);
5161 // Create a PLT entry for a global symbol.
5163 template<int size, bool big_endian>
5165 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
5169 if (gsym->type() == elfcpp::STT_GNU_IFUNC
5170 && gsym->can_use_relative_reloc(false))
5172 if (this->iplt_ == NULL)
5173 this->make_iplt_section(symtab, layout);
5174 this->iplt_->add_ifunc_entry(gsym);
5178 if (this->plt_ == NULL)
5179 this->make_plt_section(symtab, layout);
5180 this->plt_->add_entry(gsym);
5184 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5186 template<int size, bool big_endian>
5188 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
5189 Symbol_table* symtab,
5191 Sized_relobj_file<size, big_endian>* relobj,
5194 if (this->iplt_ == NULL)
5195 this->make_iplt_section(symtab, layout);
5196 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
5199 // Return the number of entries in the PLT.
5201 template<int size, bool big_endian>
5203 Target_powerpc<size, big_endian>::plt_entry_count() const
5205 if (this->plt_ == NULL)
5207 return this->plt_->entry_count();
5210 // Create a GOT entry for local dynamic __tls_get_addr calls.
5212 template<int size, bool big_endian>
5214 Target_powerpc<size, big_endian>::tlsld_got_offset(
5215 Symbol_table* symtab,
5217 Sized_relobj_file<size, big_endian>* object)
5219 if (this->tlsld_got_offset_ == -1U)
5221 gold_assert(symtab != NULL && layout != NULL && object != NULL);
5222 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
5223 Output_data_got_powerpc<size, big_endian>* got
5224 = this->got_section(symtab, layout);
5225 unsigned int got_offset = got->add_constant_pair(0, 0);
5226 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
5228 this->tlsld_got_offset_ = got_offset;
5230 return this->tlsld_got_offset_;
5233 // Get the Reference_flags for a particular relocation.
5235 template<int size, bool big_endian>
5237 Target_powerpc<size, big_endian>::Scan::get_reference_flags(
5238 unsigned int r_type,
5239 const Target_powerpc* target)
5245 case elfcpp::R_POWERPC_NONE:
5246 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5247 case elfcpp::R_POWERPC_GNU_VTENTRY:
5248 case elfcpp::R_PPC64_TOC:
5249 // No symbol reference.
5252 case elfcpp::R_PPC64_ADDR64:
5253 case elfcpp::R_PPC64_UADDR64:
5254 case elfcpp::R_POWERPC_ADDR32:
5255 case elfcpp::R_POWERPC_UADDR32:
5256 case elfcpp::R_POWERPC_ADDR16:
5257 case elfcpp::R_POWERPC_UADDR16:
5258 case elfcpp::R_POWERPC_ADDR16_LO:
5259 case elfcpp::R_POWERPC_ADDR16_HI:
5260 case elfcpp::R_POWERPC_ADDR16_HA:
5261 ref = Symbol::ABSOLUTE_REF;
5264 case elfcpp::R_POWERPC_ADDR24:
5265 case elfcpp::R_POWERPC_ADDR14:
5266 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5267 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5268 ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
5271 case elfcpp::R_PPC64_REL64:
5272 case elfcpp::R_POWERPC_REL32:
5273 case elfcpp::R_PPC_LOCAL24PC:
5274 case elfcpp::R_POWERPC_REL16:
5275 case elfcpp::R_POWERPC_REL16_LO:
5276 case elfcpp::R_POWERPC_REL16_HI:
5277 case elfcpp::R_POWERPC_REL16_HA:
5278 ref = Symbol::RELATIVE_REF;
5281 case elfcpp::R_POWERPC_REL24:
5282 case elfcpp::R_PPC_PLTREL24:
5283 case elfcpp::R_POWERPC_REL14:
5284 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5285 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5286 ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
5289 case elfcpp::R_POWERPC_GOT16:
5290 case elfcpp::R_POWERPC_GOT16_LO:
5291 case elfcpp::R_POWERPC_GOT16_HI:
5292 case elfcpp::R_POWERPC_GOT16_HA:
5293 case elfcpp::R_PPC64_GOT16_DS:
5294 case elfcpp::R_PPC64_GOT16_LO_DS:
5295 case elfcpp::R_PPC64_TOC16:
5296 case elfcpp::R_PPC64_TOC16_LO:
5297 case elfcpp::R_PPC64_TOC16_HI:
5298 case elfcpp::R_PPC64_TOC16_HA:
5299 case elfcpp::R_PPC64_TOC16_DS:
5300 case elfcpp::R_PPC64_TOC16_LO_DS:
5302 ref = Symbol::ABSOLUTE_REF;
5305 case elfcpp::R_POWERPC_GOT_TPREL16:
5306 case elfcpp::R_POWERPC_TLS:
5307 ref = Symbol::TLS_REF;
5310 case elfcpp::R_POWERPC_COPY:
5311 case elfcpp::R_POWERPC_GLOB_DAT:
5312 case elfcpp::R_POWERPC_JMP_SLOT:
5313 case elfcpp::R_POWERPC_RELATIVE:
5314 case elfcpp::R_POWERPC_DTPMOD:
5316 // Not expected. We will give an error later.
5320 if (size == 64 && target->abiversion() < 2)
5321 ref |= Symbol::FUNC_DESC_ABI;
5325 // Report an unsupported relocation against a local symbol.
5327 template<int size, bool big_endian>
5329 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
5330 Sized_relobj_file<size, big_endian>* object,
5331 unsigned int r_type)
5333 gold_error(_("%s: unsupported reloc %u against local symbol"),
5334 object->name().c_str(), r_type);
5337 // We are about to emit a dynamic relocation of type R_TYPE. If the
5338 // dynamic linker does not support it, issue an error.
5340 template<int size, bool big_endian>
5342 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
5343 unsigned int r_type)
5345 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
5347 // These are the relocation types supported by glibc for both 32-bit
5348 // and 64-bit powerpc.
5351 case elfcpp::R_POWERPC_NONE:
5352 case elfcpp::R_POWERPC_RELATIVE:
5353 case elfcpp::R_POWERPC_GLOB_DAT:
5354 case elfcpp::R_POWERPC_DTPMOD:
5355 case elfcpp::R_POWERPC_DTPREL:
5356 case elfcpp::R_POWERPC_TPREL:
5357 case elfcpp::R_POWERPC_JMP_SLOT:
5358 case elfcpp::R_POWERPC_COPY:
5359 case elfcpp::R_POWERPC_IRELATIVE:
5360 case elfcpp::R_POWERPC_ADDR32:
5361 case elfcpp::R_POWERPC_UADDR32:
5362 case elfcpp::R_POWERPC_ADDR24:
5363 case elfcpp::R_POWERPC_ADDR16:
5364 case elfcpp::R_POWERPC_UADDR16:
5365 case elfcpp::R_POWERPC_ADDR16_LO:
5366 case elfcpp::R_POWERPC_ADDR16_HI:
5367 case elfcpp::R_POWERPC_ADDR16_HA:
5368 case elfcpp::R_POWERPC_ADDR14:
5369 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5370 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5371 case elfcpp::R_POWERPC_REL32:
5372 case elfcpp::R_POWERPC_REL24:
5373 case elfcpp::R_POWERPC_TPREL16:
5374 case elfcpp::R_POWERPC_TPREL16_LO:
5375 case elfcpp::R_POWERPC_TPREL16_HI:
5376 case elfcpp::R_POWERPC_TPREL16_HA:
5387 // These are the relocation types supported only on 64-bit.
5388 case elfcpp::R_PPC64_ADDR64:
5389 case elfcpp::R_PPC64_UADDR64:
5390 case elfcpp::R_PPC64_JMP_IREL:
5391 case elfcpp::R_PPC64_ADDR16_DS:
5392 case elfcpp::R_PPC64_ADDR16_LO_DS:
5393 case elfcpp::R_PPC64_ADDR16_HIGH:
5394 case elfcpp::R_PPC64_ADDR16_HIGHA:
5395 case elfcpp::R_PPC64_ADDR16_HIGHER:
5396 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5397 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5398 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5399 case elfcpp::R_PPC64_REL64:
5400 case elfcpp::R_POWERPC_ADDR30:
5401 case elfcpp::R_PPC64_TPREL16_DS:
5402 case elfcpp::R_PPC64_TPREL16_LO_DS:
5403 case elfcpp::R_PPC64_TPREL16_HIGH:
5404 case elfcpp::R_PPC64_TPREL16_HIGHA:
5405 case elfcpp::R_PPC64_TPREL16_HIGHER:
5406 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5407 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5408 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5419 // These are the relocation types supported only on 32-bit.
5420 // ??? glibc ld.so doesn't need to support these.
5421 case elfcpp::R_POWERPC_DTPREL16:
5422 case elfcpp::R_POWERPC_DTPREL16_LO:
5423 case elfcpp::R_POWERPC_DTPREL16_HI:
5424 case elfcpp::R_POWERPC_DTPREL16_HA:
5432 // This prevents us from issuing more than one error per reloc
5433 // section. But we can still wind up issuing more than one
5434 // error per object file.
5435 if (this->issued_non_pic_error_)
5437 gold_assert(parameters->options().output_is_position_independent());
5438 object->error(_("requires unsupported dynamic reloc; "
5439 "recompile with -fPIC"));
5440 this->issued_non_pic_error_ = true;
5444 // Return whether we need to make a PLT entry for a relocation of the
5445 // given type against a STT_GNU_IFUNC symbol.
5447 template<int size, bool big_endian>
5449 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
5450 Target_powerpc<size, big_endian>* target,
5451 Sized_relobj_file<size, big_endian>* object,
5452 unsigned int r_type,
5455 // In non-pic code any reference will resolve to the plt call stub
5456 // for the ifunc symbol.
5457 if ((size == 32 || target->abiversion() >= 2)
5458 && !parameters->options().output_is_position_independent())
5463 // Word size refs from data sections are OK, but don't need a PLT entry.
5464 case elfcpp::R_POWERPC_ADDR32:
5465 case elfcpp::R_POWERPC_UADDR32:
5470 case elfcpp::R_PPC64_ADDR64:
5471 case elfcpp::R_PPC64_UADDR64:
5476 // GOT refs are good, but also don't need a PLT entry.
5477 case elfcpp::R_POWERPC_GOT16:
5478 case elfcpp::R_POWERPC_GOT16_LO:
5479 case elfcpp::R_POWERPC_GOT16_HI:
5480 case elfcpp::R_POWERPC_GOT16_HA:
5481 case elfcpp::R_PPC64_GOT16_DS:
5482 case elfcpp::R_PPC64_GOT16_LO_DS:
5485 // Function calls are good, and these do need a PLT entry.
5486 case elfcpp::R_POWERPC_ADDR24:
5487 case elfcpp::R_POWERPC_ADDR14:
5488 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5489 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5490 case elfcpp::R_POWERPC_REL24:
5491 case elfcpp::R_PPC_PLTREL24:
5492 case elfcpp::R_POWERPC_REL14:
5493 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5494 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5501 // Anything else is a problem.
5502 // If we are building a static executable, the libc startup function
5503 // responsible for applying indirect function relocations is going
5504 // to complain about the reloc type.
5505 // If we are building a dynamic executable, we will have a text
5506 // relocation. The dynamic loader will set the text segment
5507 // writable and non-executable to apply text relocations. So we'll
5508 // segfault when trying to run the indirection function to resolve
5511 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5512 object->name().c_str(), r_type);
5516 // Scan a relocation for a local symbol.
5518 template<int size, bool big_endian>
5520 Target_powerpc<size, big_endian>::Scan::local(
5521 Symbol_table* symtab,
5523 Target_powerpc<size, big_endian>* target,
5524 Sized_relobj_file<size, big_endian>* object,
5525 unsigned int data_shndx,
5526 Output_section* output_section,
5527 const elfcpp::Rela<size, big_endian>& reloc,
5528 unsigned int r_type,
5529 const elfcpp::Sym<size, big_endian>& lsym,
5532 this->maybe_skip_tls_get_addr_call(r_type, NULL);
5534 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5535 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5537 this->expect_tls_get_addr_call();
5538 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5539 if (tls_type != tls::TLSOPT_NONE)
5540 this->skip_next_tls_get_addr_call();
5542 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5543 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5545 this->expect_tls_get_addr_call();
5546 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5547 if (tls_type != tls::TLSOPT_NONE)
5548 this->skip_next_tls_get_addr_call();
5551 Powerpc_relobj<size, big_endian>* ppc_object
5552 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5557 && data_shndx == ppc_object->opd_shndx()
5558 && r_type == elfcpp::R_PPC64_ADDR64)
5559 ppc_object->set_opd_discard(reloc.get_r_offset());
5563 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5564 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
5565 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5567 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5568 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5569 r_type, r_sym, reloc.get_r_addend());
5570 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
5575 case elfcpp::R_POWERPC_NONE:
5576 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5577 case elfcpp::R_POWERPC_GNU_VTENTRY:
5578 case elfcpp::R_PPC64_TOCSAVE:
5579 case elfcpp::R_POWERPC_TLS:
5582 case elfcpp::R_PPC64_TOC:
5584 Output_data_got_powerpc<size, big_endian>* got
5585 = target->got_section(symtab, layout);
5586 if (parameters->options().output_is_position_independent())
5588 Address off = reloc.get_r_offset();
5590 && target->abiversion() < 2
5591 && data_shndx == ppc_object->opd_shndx()
5592 && ppc_object->get_opd_discard(off - 8))
5595 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5596 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5597 rela_dyn->add_output_section_relative(got->output_section(),
5598 elfcpp::R_POWERPC_RELATIVE,
5600 object, data_shndx, off,
5601 symobj->toc_base_offset());
5606 case elfcpp::R_PPC64_ADDR64:
5607 case elfcpp::R_PPC64_UADDR64:
5608 case elfcpp::R_POWERPC_ADDR32:
5609 case elfcpp::R_POWERPC_UADDR32:
5610 case elfcpp::R_POWERPC_ADDR24:
5611 case elfcpp::R_POWERPC_ADDR16:
5612 case elfcpp::R_POWERPC_ADDR16_LO:
5613 case elfcpp::R_POWERPC_ADDR16_HI:
5614 case elfcpp::R_POWERPC_ADDR16_HA:
5615 case elfcpp::R_POWERPC_UADDR16:
5616 case elfcpp::R_PPC64_ADDR16_HIGH:
5617 case elfcpp::R_PPC64_ADDR16_HIGHA:
5618 case elfcpp::R_PPC64_ADDR16_HIGHER:
5619 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5620 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5621 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5622 case elfcpp::R_PPC64_ADDR16_DS:
5623 case elfcpp::R_PPC64_ADDR16_LO_DS:
5624 case elfcpp::R_POWERPC_ADDR14:
5625 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5626 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5627 // If building a shared library (or a position-independent
5628 // executable), we need to create a dynamic relocation for
5630 if (parameters->options().output_is_position_independent()
5631 || (size == 64 && is_ifunc && target->abiversion() < 2))
5633 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5635 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5636 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
5637 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
5639 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5640 : elfcpp::R_POWERPC_RELATIVE);
5641 rela_dyn->add_local_relative(object, r_sym, dynrel,
5642 output_section, data_shndx,
5643 reloc.get_r_offset(),
5644 reloc.get_r_addend(), false);
5646 else if (lsym.get_st_type() != elfcpp::STT_SECTION)
5648 check_non_pic(object, r_type);
5649 rela_dyn->add_local(object, r_sym, r_type, output_section,
5650 data_shndx, reloc.get_r_offset(),
5651 reloc.get_r_addend());
5655 gold_assert(lsym.get_st_value() == 0);
5656 unsigned int shndx = lsym.get_st_shndx();
5658 shndx = object->adjust_sym_shndx(r_sym, shndx,
5661 object->error(_("section symbol %u has bad shndx %u"),
5664 rela_dyn->add_local_section(object, shndx, r_type,
5665 output_section, data_shndx,
5666 reloc.get_r_offset());
5671 case elfcpp::R_POWERPC_REL24:
5672 case elfcpp::R_PPC_PLTREL24:
5673 case elfcpp::R_PPC_LOCAL24PC:
5674 case elfcpp::R_POWERPC_REL14:
5675 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5676 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5678 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5679 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5680 reloc.get_r_addend());
5683 case elfcpp::R_PPC64_REL64:
5684 case elfcpp::R_POWERPC_REL32:
5685 case elfcpp::R_POWERPC_REL16:
5686 case elfcpp::R_POWERPC_REL16_LO:
5687 case elfcpp::R_POWERPC_REL16_HI:
5688 case elfcpp::R_POWERPC_REL16_HA:
5689 case elfcpp::R_POWERPC_SECTOFF:
5690 case elfcpp::R_POWERPC_SECTOFF_LO:
5691 case elfcpp::R_POWERPC_SECTOFF_HI:
5692 case elfcpp::R_POWERPC_SECTOFF_HA:
5693 case elfcpp::R_PPC64_SECTOFF_DS:
5694 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5695 case elfcpp::R_POWERPC_TPREL16:
5696 case elfcpp::R_POWERPC_TPREL16_LO:
5697 case elfcpp::R_POWERPC_TPREL16_HI:
5698 case elfcpp::R_POWERPC_TPREL16_HA:
5699 case elfcpp::R_PPC64_TPREL16_DS:
5700 case elfcpp::R_PPC64_TPREL16_LO_DS:
5701 case elfcpp::R_PPC64_TPREL16_HIGH:
5702 case elfcpp::R_PPC64_TPREL16_HIGHA:
5703 case elfcpp::R_PPC64_TPREL16_HIGHER:
5704 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5705 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5706 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5707 case elfcpp::R_POWERPC_DTPREL16:
5708 case elfcpp::R_POWERPC_DTPREL16_LO:
5709 case elfcpp::R_POWERPC_DTPREL16_HI:
5710 case elfcpp::R_POWERPC_DTPREL16_HA:
5711 case elfcpp::R_PPC64_DTPREL16_DS:
5712 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5713 case elfcpp::R_PPC64_DTPREL16_HIGH:
5714 case elfcpp::R_PPC64_DTPREL16_HIGHA:
5715 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5716 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5717 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5718 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5719 case elfcpp::R_PPC64_TLSGD:
5720 case elfcpp::R_PPC64_TLSLD:
5721 case elfcpp::R_PPC64_ADDR64_LOCAL:
5724 case elfcpp::R_POWERPC_GOT16:
5725 case elfcpp::R_POWERPC_GOT16_LO:
5726 case elfcpp::R_POWERPC_GOT16_HI:
5727 case elfcpp::R_POWERPC_GOT16_HA:
5728 case elfcpp::R_PPC64_GOT16_DS:
5729 case elfcpp::R_PPC64_GOT16_LO_DS:
5731 // The symbol requires a GOT entry.
5732 Output_data_got_powerpc<size, big_endian>* got
5733 = target->got_section(symtab, layout);
5734 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5736 if (!parameters->options().output_is_position_independent())
5739 && (size == 32 || target->abiversion() >= 2))
5740 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
5742 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
5744 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
5746 // If we are generating a shared object or a pie, this
5747 // symbol's GOT entry will be set by a dynamic relocation.
5749 off = got->add_constant(0);
5750 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
5752 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5754 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5755 : elfcpp::R_POWERPC_RELATIVE);
5756 rela_dyn->add_local_relative(object, r_sym, dynrel,
5757 got, off, 0, false);
5762 case elfcpp::R_PPC64_TOC16:
5763 case elfcpp::R_PPC64_TOC16_LO:
5764 case elfcpp::R_PPC64_TOC16_HI:
5765 case elfcpp::R_PPC64_TOC16_HA:
5766 case elfcpp::R_PPC64_TOC16_DS:
5767 case elfcpp::R_PPC64_TOC16_LO_DS:
5768 // We need a GOT section.
5769 target->got_section(symtab, layout);
5772 case elfcpp::R_POWERPC_GOT_TLSGD16:
5773 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5774 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5775 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5777 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5778 if (tls_type == tls::TLSOPT_NONE)
5780 Output_data_got_powerpc<size, big_endian>* got
5781 = target->got_section(symtab, layout);
5782 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5783 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5784 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
5785 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
5787 else if (tls_type == tls::TLSOPT_TO_LE)
5789 // no GOT relocs needed for Local Exec.
5796 case elfcpp::R_POWERPC_GOT_TLSLD16:
5797 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5798 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5799 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5801 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5802 if (tls_type == tls::TLSOPT_NONE)
5803 target->tlsld_got_offset(symtab, layout, object);
5804 else if (tls_type == tls::TLSOPT_TO_LE)
5806 // no GOT relocs needed for Local Exec.
5807 if (parameters->options().emit_relocs())
5809 Output_section* os = layout->tls_segment()->first_section();
5810 gold_assert(os != NULL);
5811 os->set_needs_symtab_index();
5819 case elfcpp::R_POWERPC_GOT_DTPREL16:
5820 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5821 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5822 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5824 Output_data_got_powerpc<size, big_endian>* got
5825 = target->got_section(symtab, layout);
5826 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5827 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
5831 case elfcpp::R_POWERPC_GOT_TPREL16:
5832 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5833 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5834 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5836 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
5837 if (tls_type == tls::TLSOPT_NONE)
5839 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5840 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
5842 Output_data_got_powerpc<size, big_endian>* got
5843 = target->got_section(symtab, layout);
5844 unsigned int off = got->add_constant(0);
5845 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
5847 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5848 rela_dyn->add_symbolless_local_addend(object, r_sym,
5849 elfcpp::R_POWERPC_TPREL,
5853 else if (tls_type == tls::TLSOPT_TO_LE)
5855 // no GOT relocs needed for Local Exec.
5863 unsupported_reloc_local(object, r_type);
5869 case elfcpp::R_POWERPC_GOT_TLSLD16:
5870 case elfcpp::R_POWERPC_GOT_TLSGD16:
5871 case elfcpp::R_POWERPC_GOT_TPREL16:
5872 case elfcpp::R_POWERPC_GOT_DTPREL16:
5873 case elfcpp::R_POWERPC_GOT16:
5874 case elfcpp::R_PPC64_GOT16_DS:
5875 case elfcpp::R_PPC64_TOC16:
5876 case elfcpp::R_PPC64_TOC16_DS:
5877 ppc_object->set_has_small_toc_reloc();
5883 // Report an unsupported relocation against a global symbol.
5885 template<int size, bool big_endian>
5887 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
5888 Sized_relobj_file<size, big_endian>* object,
5889 unsigned int r_type,
5892 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5893 object->name().c_str(), r_type, gsym->demangled_name().c_str());
5896 // Scan a relocation for a global symbol.
5898 template<int size, bool big_endian>
5900 Target_powerpc<size, big_endian>::Scan::global(
5901 Symbol_table* symtab,
5903 Target_powerpc<size, big_endian>* target,
5904 Sized_relobj_file<size, big_endian>* object,
5905 unsigned int data_shndx,
5906 Output_section* output_section,
5907 const elfcpp::Rela<size, big_endian>& reloc,
5908 unsigned int r_type,
5911 if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP)
5914 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5915 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5917 this->expect_tls_get_addr_call();
5918 const bool final = gsym->final_value_is_known();
5919 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5920 if (tls_type != tls::TLSOPT_NONE)
5921 this->skip_next_tls_get_addr_call();
5923 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5924 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5926 this->expect_tls_get_addr_call();
5927 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5928 if (tls_type != tls::TLSOPT_NONE)
5929 this->skip_next_tls_get_addr_call();
5932 Powerpc_relobj<size, big_endian>* ppc_object
5933 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5935 // A STT_GNU_IFUNC symbol may require a PLT entry.
5936 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
5937 bool pushed_ifunc = false;
5938 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
5940 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5941 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5942 reloc.get_r_addend());
5943 target->make_plt_entry(symtab, layout, gsym);
5944 pushed_ifunc = true;
5949 case elfcpp::R_POWERPC_NONE:
5950 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5951 case elfcpp::R_POWERPC_GNU_VTENTRY:
5952 case elfcpp::R_PPC_LOCAL24PC:
5953 case elfcpp::R_POWERPC_TLS:
5956 case elfcpp::R_PPC64_TOC:
5958 Output_data_got_powerpc<size, big_endian>* got
5959 = target->got_section(symtab, layout);
5960 if (parameters->options().output_is_position_independent())
5962 Address off = reloc.get_r_offset();
5964 && data_shndx == ppc_object->opd_shndx()
5965 && ppc_object->get_opd_discard(off - 8))
5968 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5969 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5970 if (data_shndx != ppc_object->opd_shndx())
5971 symobj = static_cast
5972 <Powerpc_relobj<size, big_endian>*>(gsym->object());
5973 rela_dyn->add_output_section_relative(got->output_section(),
5974 elfcpp::R_POWERPC_RELATIVE,
5976 object, data_shndx, off,
5977 symobj->toc_base_offset());
5982 case elfcpp::R_PPC64_ADDR64:
5984 && target->abiversion() < 2
5985 && data_shndx == ppc_object->opd_shndx()
5986 && (gsym->is_defined_in_discarded_section()
5987 || gsym->object() != object))
5989 ppc_object->set_opd_discard(reloc.get_r_offset());
5993 case elfcpp::R_PPC64_UADDR64:
5994 case elfcpp::R_POWERPC_ADDR32:
5995 case elfcpp::R_POWERPC_UADDR32:
5996 case elfcpp::R_POWERPC_ADDR24:
5997 case elfcpp::R_POWERPC_ADDR16:
5998 case elfcpp::R_POWERPC_ADDR16_LO:
5999 case elfcpp::R_POWERPC_ADDR16_HI:
6000 case elfcpp::R_POWERPC_ADDR16_HA:
6001 case elfcpp::R_POWERPC_UADDR16:
6002 case elfcpp::R_PPC64_ADDR16_HIGH:
6003 case elfcpp::R_PPC64_ADDR16_HIGHA:
6004 case elfcpp::R_PPC64_ADDR16_HIGHER:
6005 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6006 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6007 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6008 case elfcpp::R_PPC64_ADDR16_DS:
6009 case elfcpp::R_PPC64_ADDR16_LO_DS:
6010 case elfcpp::R_POWERPC_ADDR14:
6011 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6012 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6014 // Make a PLT entry if necessary.
6015 if (gsym->needs_plt_entry())
6017 // Since this is not a PC-relative relocation, we may be
6018 // taking the address of a function. In that case we need to
6019 // set the entry in the dynamic symbol table to the address of
6020 // the PLT call stub.
6021 bool need_ifunc_plt = false;
6022 if ((size == 32 || target->abiversion() >= 2)
6023 && gsym->is_from_dynobj()
6024 && !parameters->options().output_is_position_independent())
6026 gsym->set_needs_dynsym_value();
6027 need_ifunc_plt = true;
6029 if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt))
6031 target->push_branch(ppc_object, data_shndx,
6032 reloc.get_r_offset(), r_type,
6033 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6034 reloc.get_r_addend());
6035 target->make_plt_entry(symtab, layout, gsym);
6038 // Make a dynamic relocation if necessary.
6039 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))
6040 || (size == 64 && is_ifunc && target->abiversion() < 2))
6042 if (!parameters->options().output_is_position_independent()
6043 && gsym->may_need_copy_reloc())
6045 target->copy_reloc(symtab, layout, object,
6046 data_shndx, output_section, gsym, reloc);
6048 else if ((((size == 32
6049 && r_type == elfcpp::R_POWERPC_ADDR32)
6051 && r_type == elfcpp::R_PPC64_ADDR64
6052 && target->abiversion() >= 2))
6053 && gsym->can_use_relative_reloc(false)
6054 && !(gsym->visibility() == elfcpp::STV_PROTECTED
6055 && parameters->options().shared()))
6057 && r_type == elfcpp::R_PPC64_ADDR64
6058 && target->abiversion() < 2
6059 && (gsym->can_use_relative_reloc(false)
6060 || data_shndx == ppc_object->opd_shndx())))
6062 Reloc_section* rela_dyn
6063 = target->rela_dyn_section(symtab, layout, is_ifunc);
6064 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6065 : elfcpp::R_POWERPC_RELATIVE);
6066 rela_dyn->add_symbolless_global_addend(
6067 gsym, dynrel, output_section, object, data_shndx,
6068 reloc.get_r_offset(), reloc.get_r_addend());
6072 Reloc_section* rela_dyn
6073 = target->rela_dyn_section(symtab, layout, is_ifunc);
6074 check_non_pic(object, r_type);
6075 rela_dyn->add_global(gsym, r_type, output_section,
6077 reloc.get_r_offset(),
6078 reloc.get_r_addend());
6084 case elfcpp::R_PPC_PLTREL24:
6085 case elfcpp::R_POWERPC_REL24:
6088 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6090 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6091 reloc.get_r_addend());
6092 if (gsym->needs_plt_entry()
6093 || (!gsym->final_value_is_known()
6094 && (gsym->is_undefined()
6095 || gsym->is_from_dynobj()
6096 || gsym->is_preemptible())))
6097 target->make_plt_entry(symtab, layout, gsym);
6101 case elfcpp::R_PPC64_REL64:
6102 case elfcpp::R_POWERPC_REL32:
6103 // Make a dynamic relocation if necessary.
6104 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)))
6106 if (!parameters->options().output_is_position_independent()
6107 && gsym->may_need_copy_reloc())
6109 target->copy_reloc(symtab, layout, object,
6110 data_shndx, output_section, gsym,
6115 Reloc_section* rela_dyn
6116 = target->rela_dyn_section(symtab, layout, is_ifunc);
6117 check_non_pic(object, r_type);
6118 rela_dyn->add_global(gsym, r_type, output_section, object,
6119 data_shndx, reloc.get_r_offset(),
6120 reloc.get_r_addend());
6125 case elfcpp::R_POWERPC_REL14:
6126 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6127 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6129 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6130 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
6131 reloc.get_r_addend());
6134 case elfcpp::R_POWERPC_REL16:
6135 case elfcpp::R_POWERPC_REL16_LO:
6136 case elfcpp::R_POWERPC_REL16_HI:
6137 case elfcpp::R_POWERPC_REL16_HA:
6138 case elfcpp::R_POWERPC_SECTOFF:
6139 case elfcpp::R_POWERPC_SECTOFF_LO:
6140 case elfcpp::R_POWERPC_SECTOFF_HI:
6141 case elfcpp::R_POWERPC_SECTOFF_HA:
6142 case elfcpp::R_PPC64_SECTOFF_DS:
6143 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6144 case elfcpp::R_POWERPC_TPREL16:
6145 case elfcpp::R_POWERPC_TPREL16_LO:
6146 case elfcpp::R_POWERPC_TPREL16_HI:
6147 case elfcpp::R_POWERPC_TPREL16_HA:
6148 case elfcpp::R_PPC64_TPREL16_DS:
6149 case elfcpp::R_PPC64_TPREL16_LO_DS:
6150 case elfcpp::R_PPC64_TPREL16_HIGH:
6151 case elfcpp::R_PPC64_TPREL16_HIGHA:
6152 case elfcpp::R_PPC64_TPREL16_HIGHER:
6153 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6154 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6155 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6156 case elfcpp::R_POWERPC_DTPREL16:
6157 case elfcpp::R_POWERPC_DTPREL16_LO:
6158 case elfcpp::R_POWERPC_DTPREL16_HI:
6159 case elfcpp::R_POWERPC_DTPREL16_HA:
6160 case elfcpp::R_PPC64_DTPREL16_DS:
6161 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6162 case elfcpp::R_PPC64_DTPREL16_HIGH:
6163 case elfcpp::R_PPC64_DTPREL16_HIGHA:
6164 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6165 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6166 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6167 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6168 case elfcpp::R_PPC64_TLSGD:
6169 case elfcpp::R_PPC64_TLSLD:
6170 case elfcpp::R_PPC64_ADDR64_LOCAL:
6173 case elfcpp::R_POWERPC_GOT16:
6174 case elfcpp::R_POWERPC_GOT16_LO:
6175 case elfcpp::R_POWERPC_GOT16_HI:
6176 case elfcpp::R_POWERPC_GOT16_HA:
6177 case elfcpp::R_PPC64_GOT16_DS:
6178 case elfcpp::R_PPC64_GOT16_LO_DS:
6180 // The symbol requires a GOT entry.
6181 Output_data_got_powerpc<size, big_endian>* got;
6183 got = target->got_section(symtab, layout);
6184 if (gsym->final_value_is_known())
6187 && (size == 32 || target->abiversion() >= 2))
6188 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
6190 got->add_global(gsym, GOT_TYPE_STANDARD);
6192 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
6194 // If we are generating a shared object or a pie, this
6195 // symbol's GOT entry will be set by a dynamic relocation.
6196 unsigned int off = got->add_constant(0);
6197 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
6199 Reloc_section* rela_dyn
6200 = target->rela_dyn_section(symtab, layout, is_ifunc);
6202 if (gsym->can_use_relative_reloc(false)
6204 || target->abiversion() >= 2)
6205 && gsym->visibility() == elfcpp::STV_PROTECTED
6206 && parameters->options().shared()))
6208 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6209 : elfcpp::R_POWERPC_RELATIVE);
6210 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
6214 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
6215 rela_dyn->add_global(gsym, dynrel, got, off, 0);
6221 case elfcpp::R_PPC64_TOC16:
6222 case elfcpp::R_PPC64_TOC16_LO:
6223 case elfcpp::R_PPC64_TOC16_HI:
6224 case elfcpp::R_PPC64_TOC16_HA:
6225 case elfcpp::R_PPC64_TOC16_DS:
6226 case elfcpp::R_PPC64_TOC16_LO_DS:
6227 // We need a GOT section.
6228 target->got_section(symtab, layout);
6231 case elfcpp::R_POWERPC_GOT_TLSGD16:
6232 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6233 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6234 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6236 const bool final = gsym->final_value_is_known();
6237 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6238 if (tls_type == tls::TLSOPT_NONE)
6240 Output_data_got_powerpc<size, big_endian>* got
6241 = target->got_section(symtab, layout);
6242 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6243 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn,
6244 elfcpp::R_POWERPC_DTPMOD,
6245 elfcpp::R_POWERPC_DTPREL);
6247 else if (tls_type == tls::TLSOPT_TO_IE)
6249 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6251 Output_data_got_powerpc<size, big_endian>* got
6252 = target->got_section(symtab, layout);
6253 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6254 if (gsym->is_undefined()
6255 || gsym->is_from_dynobj())
6257 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6258 elfcpp::R_POWERPC_TPREL);
6262 unsigned int off = got->add_constant(0);
6263 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6264 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6265 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6270 else if (tls_type == tls::TLSOPT_TO_LE)
6272 // no GOT relocs needed for Local Exec.
6279 case elfcpp::R_POWERPC_GOT_TLSLD16:
6280 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6281 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6282 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6284 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6285 if (tls_type == tls::TLSOPT_NONE)
6286 target->tlsld_got_offset(symtab, layout, object);
6287 else if (tls_type == tls::TLSOPT_TO_LE)
6289 // no GOT relocs needed for Local Exec.
6290 if (parameters->options().emit_relocs())
6292 Output_section* os = layout->tls_segment()->first_section();
6293 gold_assert(os != NULL);
6294 os->set_needs_symtab_index();
6302 case elfcpp::R_POWERPC_GOT_DTPREL16:
6303 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6304 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6305 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6307 Output_data_got_powerpc<size, big_endian>* got
6308 = target->got_section(symtab, layout);
6309 if (!gsym->final_value_is_known()
6310 && (gsym->is_from_dynobj()
6311 || gsym->is_undefined()
6312 || gsym->is_preemptible()))
6313 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
6314 target->rela_dyn_section(layout),
6315 elfcpp::R_POWERPC_DTPREL);
6317 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
6321 case elfcpp::R_POWERPC_GOT_TPREL16:
6322 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6323 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6324 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6326 const bool final = gsym->final_value_is_known();
6327 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6328 if (tls_type == tls::TLSOPT_NONE)
6330 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
6332 Output_data_got_powerpc<size, big_endian>* got
6333 = target->got_section(symtab, layout);
6334 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6335 if (gsym->is_undefined()
6336 || gsym->is_from_dynobj())
6338 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
6339 elfcpp::R_POWERPC_TPREL);
6343 unsigned int off = got->add_constant(0);
6344 gsym->set_got_offset(GOT_TYPE_TPREL, off);
6345 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
6346 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
6351 else if (tls_type == tls::TLSOPT_TO_LE)
6353 // no GOT relocs needed for Local Exec.
6361 unsupported_reloc_global(object, r_type, gsym);
6367 case elfcpp::R_POWERPC_GOT_TLSLD16:
6368 case elfcpp::R_POWERPC_GOT_TLSGD16:
6369 case elfcpp::R_POWERPC_GOT_TPREL16:
6370 case elfcpp::R_POWERPC_GOT_DTPREL16:
6371 case elfcpp::R_POWERPC_GOT16:
6372 case elfcpp::R_PPC64_GOT16_DS:
6373 case elfcpp::R_PPC64_TOC16:
6374 case elfcpp::R_PPC64_TOC16_DS:
6375 ppc_object->set_has_small_toc_reloc();
6381 // Process relocations for gc.
6383 template<int size, bool big_endian>
6385 Target_powerpc<size, big_endian>::gc_process_relocs(
6386 Symbol_table* symtab,
6388 Sized_relobj_file<size, big_endian>* object,
6389 unsigned int data_shndx,
6391 const unsigned char* prelocs,
6393 Output_section* output_section,
6394 bool needs_special_offset_handling,
6395 size_t local_symbol_count,
6396 const unsigned char* plocal_symbols)
6398 typedef Target_powerpc<size, big_endian> Powerpc;
6399 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6400 Powerpc_relobj<size, big_endian>* ppc_object
6401 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
6403 ppc_object->set_opd_valid();
6404 if (size == 64 && data_shndx == ppc_object->opd_shndx())
6406 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
6407 for (p = ppc_object->access_from_map()->begin();
6408 p != ppc_object->access_from_map()->end();
6411 Address dst_off = p->first;
6412 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6413 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
6414 for (s = p->second.begin(); s != p->second.end(); ++s)
6416 Relobj* src_obj = s->first;
6417 unsigned int src_indx = s->second;
6418 symtab->gc()->add_reference(src_obj, src_indx,
6419 ppc_object, dst_indx);
6423 ppc_object->access_from_map()->clear();
6424 ppc_object->process_gc_mark(symtab);
6425 // Don't look at .opd relocs as .opd will reference everything.
6429 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
6430 typename Target_powerpc::Relocatable_size_for_reloc>(
6439 needs_special_offset_handling,
6444 // Handle target specific gc actions when adding a gc reference from
6445 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6446 // and DST_OFF. For powerpc64, this adds a referenc to the code
6447 // section of a function descriptor.
6449 template<int size, bool big_endian>
6451 Target_powerpc<size, big_endian>::do_gc_add_reference(
6452 Symbol_table* symtab,
6454 unsigned int src_shndx,
6456 unsigned int dst_shndx,
6457 Address dst_off) const
6459 if (size != 64 || dst_obj->is_dynamic())
6462 Powerpc_relobj<size, big_endian>* ppc_object
6463 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
6464 if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
6466 if (ppc_object->opd_valid())
6468 dst_shndx = ppc_object->get_opd_ent(dst_off);
6469 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
6473 // If we haven't run scan_opd_relocs, we must delay
6474 // processing this function descriptor reference.
6475 ppc_object->add_reference(src_obj, src_shndx, dst_off);
6480 // Add any special sections for this symbol to the gc work list.
6481 // For powerpc64, this adds the code section of a function
6484 template<int size, bool big_endian>
6486 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
6487 Symbol_table* symtab,
6492 Powerpc_relobj<size, big_endian>* ppc_object
6493 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
6495 unsigned int shndx = sym->shndx(&is_ordinary);
6496 if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
6498 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
6499 Address dst_off = gsym->value();
6500 if (ppc_object->opd_valid())
6502 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
6503 symtab->gc()->worklist().push_back(Section_id(ppc_object,
6507 ppc_object->add_gc_mark(dst_off);
6512 // For a symbol location in .opd, set LOC to the location of the
6515 template<int size, bool big_endian>
6517 Target_powerpc<size, big_endian>::do_function_location(
6518 Symbol_location* loc) const
6520 if (size == 64 && loc->shndx != 0)
6522 if (loc->object->is_dynamic())
6524 Powerpc_dynobj<size, big_endian>* ppc_object
6525 = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
6526 if (loc->shndx == ppc_object->opd_shndx())
6529 Address off = loc->offset - ppc_object->opd_address();
6530 loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
6531 loc->offset = dest_off;
6536 const Powerpc_relobj<size, big_endian>* ppc_object
6537 = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
6538 if (loc->shndx == ppc_object->opd_shndx())
6541 loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
6542 loc->offset = dest_off;
6548 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6549 // compiled with -fsplit-stack. The function calls non-split-stack
6550 // code. Change the function to ensure it has enough stack space to
6551 // call some random function.
6553 template<int size, bool big_endian>
6555 Target_powerpc<size, big_endian>::do_calls_non_split(
6558 section_offset_type fnoffset,
6559 section_size_type fnsize,
6560 unsigned char* view,
6561 section_size_type view_size,
6563 std::string* to) const
6565 // 32-bit not supported.
6569 Target::do_calls_non_split(object, shndx, fnoffset, fnsize,
6570 view, view_size, from, to);
6574 // The function always starts with
6575 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6576 // addis %r12,%r1,-allocate@ha
6577 // addi %r12,%r12,-allocate@l
6579 // but note that the addis or addi may be replaced with a nop
6581 unsigned char *entry = view + fnoffset;
6582 uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry);
6584 if ((insn & 0xffff0000) == addis_2_12)
6586 /* Skip ELFv2 global entry code. */
6588 insn = elfcpp::Swap<32, big_endian>::readval(entry);
6591 unsigned char *pinsn = entry;
6593 const uint32_t ld_private_ss = 0xe80d8fc0;
6594 if (insn == ld_private_ss)
6596 int32_t allocate = 0;
6600 insn = elfcpp::Swap<32, big_endian>::readval(pinsn);
6601 if ((insn & 0xffff0000) == addis_12_1)
6602 allocate += (insn & 0xffff) << 16;
6603 else if ((insn & 0xffff0000) == addi_12_1
6604 || (insn & 0xffff0000) == addi_12_12)
6605 allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000;
6606 else if (insn != nop)
6609 if (insn == cmpld_7_12_0 && pinsn == entry + 12)
6611 int extra = parameters->options().split_stack_adjust_size();
6613 if (allocate >= 0 || extra < 0)
6615 object->error(_("split-stack stack size overflow at "
6616 "section %u offset %0zx"),
6617 shndx, static_cast<size_t>(fnoffset));
6621 insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff);
6622 if (insn != addis_12_1)
6624 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6626 insn = addi_12_12 | (allocate & 0xffff);
6627 if (insn != addi_12_12)
6629 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6635 insn = addi_12_1 | (allocate & 0xffff);
6636 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
6639 if (pinsn != entry + 12)
6640 elfcpp::Swap<32, big_endian>::writeval(pinsn, nop);
6648 if (!object->has_no_split_stack())
6649 object->error(_("failed to match split-stack sequence at "
6650 "section %u offset %0zx"),
6651 shndx, static_cast<size_t>(fnoffset));
6655 // Scan relocations for a section.
6657 template<int size, bool big_endian>
6659 Target_powerpc<size, big_endian>::scan_relocs(
6660 Symbol_table* symtab,
6662 Sized_relobj_file<size, big_endian>* object,
6663 unsigned int data_shndx,
6664 unsigned int sh_type,
6665 const unsigned char* prelocs,
6667 Output_section* output_section,
6668 bool needs_special_offset_handling,
6669 size_t local_symbol_count,
6670 const unsigned char* plocal_symbols)
6672 typedef Target_powerpc<size, big_endian> Powerpc;
6673 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6675 if (sh_type == elfcpp::SHT_REL)
6677 gold_error(_("%s: unsupported REL reloc section"),
6678 object->name().c_str());
6682 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
6691 needs_special_offset_handling,
6696 // Functor class for processing the global symbol table.
6697 // Removes symbols defined on discarded opd entries.
6699 template<bool big_endian>
6700 class Global_symbol_visitor_opd
6703 Global_symbol_visitor_opd()
6707 operator()(Sized_symbol<64>* sym)
6709 if (sym->has_symtab_index()
6710 || sym->source() != Symbol::FROM_OBJECT
6711 || !sym->in_real_elf())
6714 if (sym->object()->is_dynamic())
6717 Powerpc_relobj<64, big_endian>* symobj
6718 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
6719 if (symobj->opd_shndx() == 0)
6723 unsigned int shndx = sym->shndx(&is_ordinary);
6724 if (shndx == symobj->opd_shndx()
6725 && symobj->get_opd_discard(sym->value()))
6727 sym->set_undefined();
6728 sym->set_visibility(elfcpp::STV_DEFAULT);
6729 sym->set_is_defined_in_discarded_section();
6730 sym->set_symtab_index(-1U);
6735 template<int size, bool big_endian>
6737 Target_powerpc<size, big_endian>::define_save_restore_funcs(
6739 Symbol_table* symtab)
6743 Output_data_save_res<size, big_endian>* savres
6744 = new Output_data_save_res<size, big_endian>(symtab);
6745 this->savres_section_ = savres;
6746 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
6747 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
6748 savres, ORDER_TEXT, false);
6752 // Sort linker created .got section first (for the header), then input
6753 // sections belonging to files using small model code.
6755 template<bool big_endian>
6756 class Sort_toc_sections
6760 operator()(const Output_section::Input_section& is1,
6761 const Output_section::Input_section& is2) const
6763 if (!is1.is_input_section() && is2.is_input_section())
6766 = (is1.is_input_section()
6767 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
6768 ->has_small_toc_reloc()));
6770 = (is2.is_input_section()
6771 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
6772 ->has_small_toc_reloc()));
6773 return small1 && !small2;
6777 // Finalize the sections.
6779 template<int size, bool big_endian>
6781 Target_powerpc<size, big_endian>::do_finalize_sections(
6783 const Input_objects*,
6784 Symbol_table* symtab)
6786 if (parameters->doing_static_link())
6788 // At least some versions of glibc elf-init.o have a strong
6789 // reference to __rela_iplt marker syms. A weak ref would be
6791 if (this->iplt_ != NULL)
6793 Reloc_section* rel = this->iplt_->rel_plt();
6794 symtab->define_in_output_data("__rela_iplt_start", NULL,
6795 Symbol_table::PREDEFINED, rel, 0, 0,
6796 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6797 elfcpp::STV_HIDDEN, 0, false, true);
6798 symtab->define_in_output_data("__rela_iplt_end", NULL,
6799 Symbol_table::PREDEFINED, rel, 0, 0,
6800 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6801 elfcpp::STV_HIDDEN, 0, true, true);
6805 symtab->define_as_constant("__rela_iplt_start", NULL,
6806 Symbol_table::PREDEFINED, 0, 0,
6807 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6808 elfcpp::STV_HIDDEN, 0, true, false);
6809 symtab->define_as_constant("__rela_iplt_end", NULL,
6810 Symbol_table::PREDEFINED, 0, 0,
6811 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6812 elfcpp::STV_HIDDEN, 0, true, false);
6818 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
6819 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
6821 if (!parameters->options().relocatable())
6823 this->define_save_restore_funcs(layout, symtab);
6825 // Annoyingly, we need to make these sections now whether or
6826 // not we need them. If we delay until do_relax then we
6827 // need to mess with the relaxation machinery checkpointing.
6828 this->got_section(symtab, layout);
6829 this->make_brlt_section(layout);
6831 if (parameters->options().toc_sort())
6833 Output_section* os = this->got_->output_section();
6834 if (os != NULL && os->input_sections().size() > 1)
6835 std::stable_sort(os->input_sections().begin(),
6836 os->input_sections().end(),
6837 Sort_toc_sections<big_endian>());
6842 // Fill in some more dynamic tags.
6843 Output_data_dynamic* odyn = layout->dynamic_data();
6846 const Reloc_section* rel_plt = (this->plt_ == NULL
6848 : this->plt_->rel_plt());
6849 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
6850 this->rela_dyn_, true, size == 32);
6854 if (this->got_ != NULL)
6856 this->got_->finalize_data_size();
6857 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
6858 this->got_, this->got_->g_o_t());
6863 if (this->glink_ != NULL)
6865 this->glink_->finalize_data_size();
6866 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
6868 (this->glink_->pltresolve_size
6874 // Emit any relocs we saved in an attempt to avoid generating COPY
6876 if (this->copy_relocs_.any_saved_relocs())
6877 this->copy_relocs_.emit(this->rela_dyn_section(layout));
6880 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6884 ok_lo_toc_insn(uint32_t insn)
6886 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6887 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6888 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6889 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6890 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6891 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6892 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6893 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6894 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6895 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6896 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6897 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6898 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6899 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6900 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6902 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6903 && ((insn & 3) == 0 || (insn & 3) == 3))
6904 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
6907 // Return the value to use for a branch relocation.
6909 template<int size, bool big_endian>
6911 Target_powerpc<size, big_endian>::symval_for_branch(
6912 const Symbol_table* symtab,
6913 const Sized_symbol<size>* gsym,
6914 Powerpc_relobj<size, big_endian>* object,
6916 unsigned int *dest_shndx)
6918 if (size == 32 || this->abiversion() >= 2)
6922 // If the symbol is defined in an opd section, ie. is a function
6923 // descriptor, use the function descriptor code entry address
6924 Powerpc_relobj<size, big_endian>* symobj = object;
6926 && gsym->source() != Symbol::FROM_OBJECT)
6929 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
6930 unsigned int shndx = symobj->opd_shndx();
6933 Address opd_addr = symobj->get_output_section_offset(shndx);
6934 if (opd_addr == invalid_address)
6936 opd_addr += symobj->output_section_address(shndx);
6937 if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx))
6940 *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off);
6941 if (symtab->is_section_folded(symobj, *dest_shndx))
6944 = symtab->icf()->get_folded_section(symobj, *dest_shndx);
6945 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
6946 *dest_shndx = folded.second;
6948 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
6949 if (sec_addr == invalid_address)
6952 sec_addr += symobj->output_section(*dest_shndx)->address();
6953 *value = sec_addr + sec_off;
6958 // Perform a relocation.
6960 template<int size, bool big_endian>
6962 Target_powerpc<size, big_endian>::Relocate::relocate(
6963 const Relocate_info<size, big_endian>* relinfo,
6964 Target_powerpc* target,
6967 const elfcpp::Rela<size, big_endian>& rela,
6968 unsigned int r_type,
6969 const Sized_symbol<size>* gsym,
6970 const Symbol_value<size>* psymval,
6971 unsigned char* view,
6973 section_size_type view_size)
6978 switch (this->maybe_skip_tls_get_addr_call(r_type, gsym))
6980 case Track_tls::NOT_EXPECTED:
6981 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6982 _("__tls_get_addr call lacks marker reloc"));
6984 case Track_tls::EXPECTED:
6985 // We have already complained.
6987 case Track_tls::SKIP:
6989 case Track_tls::NORMAL:
6993 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
6994 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
6995 Powerpc_relobj<size, big_endian>* const object
6996 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
6998 bool has_stub_value = false;
6999 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7001 ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
7002 : object->local_has_plt_offset(r_sym))
7003 && (!psymval->is_ifunc_symbol()
7004 || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false)))
7008 && target->abiversion() >= 2
7009 && !parameters->options().output_is_position_independent()
7010 && !is_branch_reloc(r_type))
7012 Address off = target->glink_section()->find_global_entry(gsym);
7013 if (off != invalid_address)
7015 value = target->glink_section()->global_entry_address() + off;
7016 has_stub_value = true;
7021 Stub_table<size, big_endian>* stub_table
7022 = object->stub_table(relinfo->data_shndx);
7023 if (stub_table == NULL)
7025 // This is a ref from a data section to an ifunc symbol.
7026 if (target->stub_tables().size() != 0)
7027 stub_table = target->stub_tables()[0];
7029 if (stub_table != NULL)
7033 off = stub_table->find_plt_call_entry(object, gsym, r_type,
7034 rela.get_r_addend());
7036 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
7037 rela.get_r_addend());
7038 if (off != invalid_address)
7040 value = stub_table->stub_address() + off;
7041 has_stub_value = true;
7045 // We don't care too much about bogus debug references to
7046 // non-local functions, but otherwise there had better be a plt
7047 // call stub or global entry stub as appropriate.
7048 gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC));
7051 if (r_type == elfcpp::R_POWERPC_GOT16
7052 || r_type == elfcpp::R_POWERPC_GOT16_LO
7053 || r_type == elfcpp::R_POWERPC_GOT16_HI
7054 || r_type == elfcpp::R_POWERPC_GOT16_HA
7055 || r_type == elfcpp::R_PPC64_GOT16_DS
7056 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
7060 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
7061 value = gsym->got_offset(GOT_TYPE_STANDARD);
7065 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7066 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
7067 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
7069 value -= target->got_section()->got_base_offset(object);
7071 else if (r_type == elfcpp::R_PPC64_TOC)
7073 value = (target->got_section()->output_section()->address()
7074 + object->toc_base_offset());
7076 else if (gsym != NULL
7077 && (r_type == elfcpp::R_POWERPC_REL24
7078 || r_type == elfcpp::R_PPC_PLTREL24)
7083 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
7084 Valtype* wv = reinterpret_cast<Valtype*>(view);
7085 bool can_plt_call = false;
7086 if (rela.get_r_offset() + 8 <= view_size)
7088 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
7089 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
7092 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
7094 elfcpp::Swap<32, big_endian>::
7095 writeval(wv + 1, ld_2_1 + target->stk_toc());
7096 can_plt_call = true;
7101 // If we don't have a branch and link followed by a nop,
7102 // we can't go via the plt because there is no place to
7103 // put a toc restoring instruction.
7104 // Unless we know we won't be returning.
7105 if (strcmp(gsym->name(), "__libc_start_main") == 0)
7106 can_plt_call = true;
7110 // g++ as of 20130507 emits self-calls without a
7111 // following nop. This is arguably wrong since we have
7112 // conflicting information. On the one hand a global
7113 // symbol and on the other a local call sequence, but
7114 // don't error for this special case.
7115 // It isn't possible to cheaply verify we have exactly
7116 // such a call. Allow all calls to the same section.
7118 Address code = value;
7119 if (gsym->source() == Symbol::FROM_OBJECT
7120 && gsym->object() == object)
7122 unsigned int dest_shndx = 0;
7123 if (target->abiversion() < 2)
7125 Address addend = rela.get_r_addend();
7126 code = psymval->value(object, addend);
7127 target->symval_for_branch(relinfo->symtab, gsym, object,
7128 &code, &dest_shndx);
7131 if (dest_shndx == 0)
7132 dest_shndx = gsym->shndx(&is_ordinary);
7133 ok = dest_shndx == relinfo->data_shndx;
7137 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7138 _("call lacks nop, can't restore toc; "
7139 "recompile with -fPIC"));
7145 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7146 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
7147 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
7148 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
7150 // First instruction of a global dynamic sequence, arg setup insn.
7151 const bool final = gsym == NULL || gsym->final_value_is_known();
7152 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7153 enum Got_type got_type = GOT_TYPE_STANDARD;
7154 if (tls_type == tls::TLSOPT_NONE)
7155 got_type = GOT_TYPE_TLSGD;
7156 else if (tls_type == tls::TLSOPT_TO_IE)
7157 got_type = GOT_TYPE_TPREL;
7158 if (got_type != GOT_TYPE_STANDARD)
7162 gold_assert(gsym->has_got_offset(got_type));
7163 value = gsym->got_offset(got_type);
7167 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7168 gold_assert(object->local_has_got_offset(r_sym, got_type));
7169 value = object->local_got_offset(r_sym, got_type);
7171 value -= target->got_section()->got_base_offset(object);
7173 if (tls_type == tls::TLSOPT_TO_IE)
7175 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7176 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7178 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7179 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7180 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
7182 insn |= 32 << 26; // lwz
7184 insn |= 58 << 26; // ld
7185 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7187 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
7188 - elfcpp::R_POWERPC_GOT_TLSGD16);
7190 else if (tls_type == tls::TLSOPT_TO_LE)
7192 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7193 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7195 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7196 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7197 insn &= (1 << 26) - (1 << 21); // extract rt
7202 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7203 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7204 value = psymval->value(object, rela.get_r_addend());
7208 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7210 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7211 r_type = elfcpp::R_POWERPC_NONE;
7215 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7216 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
7217 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
7218 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
7220 // First instruction of a local dynamic sequence, arg setup insn.
7221 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7222 if (tls_type == tls::TLSOPT_NONE)
7224 value = target->tlsld_got_offset();
7225 value -= target->got_section()->got_base_offset(object);
7229 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7230 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7231 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
7233 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7234 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7235 insn &= (1 << 26) - (1 << 21); // extract rt
7240 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7241 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7246 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7248 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7249 r_type = elfcpp::R_POWERPC_NONE;
7253 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
7254 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
7255 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
7256 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
7258 // Accesses relative to a local dynamic sequence address,
7259 // no optimisation here.
7262 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
7263 value = gsym->got_offset(GOT_TYPE_DTPREL);
7267 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7268 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
7269 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
7271 value -= target->got_section()->got_base_offset(object);
7273 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7274 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
7275 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
7276 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
7278 // First instruction of initial exec sequence.
7279 const bool final = gsym == NULL || gsym->final_value_is_known();
7280 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7281 if (tls_type == tls::TLSOPT_NONE)
7285 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
7286 value = gsym->got_offset(GOT_TYPE_TPREL);
7290 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
7291 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
7292 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
7294 value -= target->got_section()->got_base_offset(object);
7298 gold_assert(tls_type == tls::TLSOPT_TO_LE);
7299 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7300 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
7302 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7303 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7304 insn &= (1 << 26) - (1 << 21); // extract rt from ld
7309 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7310 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7311 value = psymval->value(object, rela.get_r_addend());
7315 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7317 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7318 r_type = elfcpp::R_POWERPC_NONE;
7322 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
7323 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
7325 // Second instruction of a global dynamic sequence,
7326 // the __tls_get_addr call
7327 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7328 const bool final = gsym == NULL || gsym->final_value_is_known();
7329 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7330 if (tls_type != tls::TLSOPT_NONE)
7332 if (tls_type == tls::TLSOPT_TO_IE)
7334 Insn* iview = reinterpret_cast<Insn*>(view);
7335 Insn insn = add_3_3_13;
7338 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7339 r_type = elfcpp::R_POWERPC_NONE;
7343 Insn* iview = reinterpret_cast<Insn*>(view);
7344 Insn insn = addi_3_3;
7345 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7346 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7347 view += 2 * big_endian;
7348 value = psymval->value(object, rela.get_r_addend());
7350 this->skip_next_tls_get_addr_call();
7353 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
7354 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
7356 // Second instruction of a local dynamic sequence,
7357 // the __tls_get_addr call
7358 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
7359 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7360 if (tls_type == tls::TLSOPT_TO_LE)
7362 Insn* iview = reinterpret_cast<Insn*>(view);
7363 Insn insn = addi_3_3;
7364 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7365 this->skip_next_tls_get_addr_call();
7366 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7367 view += 2 * big_endian;
7371 else if (r_type == elfcpp::R_POWERPC_TLS)
7373 // Second instruction of an initial exec sequence
7374 const bool final = gsym == NULL || gsym->final_value_is_known();
7375 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7376 if (tls_type == tls::TLSOPT_TO_LE)
7378 Insn* iview = reinterpret_cast<Insn*>(view);
7379 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7380 unsigned int reg = size == 32 ? 2 : 13;
7381 insn = at_tls_transform(insn, reg);
7382 gold_assert(insn != 0);
7383 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7384 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7385 view += 2 * big_endian;
7386 value = psymval->value(object, rela.get_r_addend());
7389 else if (!has_stub_value)
7392 if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24))
7393 addend = rela.get_r_addend();
7394 value = psymval->value(object, addend);
7395 if (size == 64 && is_branch_reloc(r_type))
7397 if (target->abiversion() >= 2)
7400 value += object->ppc64_local_entry_offset(gsym);
7402 value += object->ppc64_local_entry_offset(r_sym);
7406 unsigned int dest_shndx;
7407 target->symval_for_branch(relinfo->symtab, gsym, object,
7408 &value, &dest_shndx);
7411 Address max_branch_offset = max_branch_delta(r_type);
7412 if (max_branch_offset != 0
7413 && value - address + max_branch_offset >= 2 * max_branch_offset)
7415 Stub_table<size, big_endian>* stub_table
7416 = object->stub_table(relinfo->data_shndx);
7417 if (stub_table != NULL)
7419 Address off = stub_table->find_long_branch_entry(object, value);
7420 if (off != invalid_address)
7422 value = (stub_table->stub_address() + stub_table->plt_size()
7424 has_stub_value = true;
7432 case elfcpp::R_PPC64_REL64:
7433 case elfcpp::R_POWERPC_REL32:
7434 case elfcpp::R_POWERPC_REL24:
7435 case elfcpp::R_PPC_PLTREL24:
7436 case elfcpp::R_PPC_LOCAL24PC:
7437 case elfcpp::R_POWERPC_REL16:
7438 case elfcpp::R_POWERPC_REL16_LO:
7439 case elfcpp::R_POWERPC_REL16_HI:
7440 case elfcpp::R_POWERPC_REL16_HA:
7441 case elfcpp::R_POWERPC_REL14:
7442 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7443 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7447 case elfcpp::R_PPC64_TOC16:
7448 case elfcpp::R_PPC64_TOC16_LO:
7449 case elfcpp::R_PPC64_TOC16_HI:
7450 case elfcpp::R_PPC64_TOC16_HA:
7451 case elfcpp::R_PPC64_TOC16_DS:
7452 case elfcpp::R_PPC64_TOC16_LO_DS:
7453 // Subtract the TOC base address.
7454 value -= (target->got_section()->output_section()->address()
7455 + object->toc_base_offset());
7458 case elfcpp::R_POWERPC_SECTOFF:
7459 case elfcpp::R_POWERPC_SECTOFF_LO:
7460 case elfcpp::R_POWERPC_SECTOFF_HI:
7461 case elfcpp::R_POWERPC_SECTOFF_HA:
7462 case elfcpp::R_PPC64_SECTOFF_DS:
7463 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7465 value -= os->address();
7468 case elfcpp::R_PPC64_TPREL16_DS:
7469 case elfcpp::R_PPC64_TPREL16_LO_DS:
7470 case elfcpp::R_PPC64_TPREL16_HIGH:
7471 case elfcpp::R_PPC64_TPREL16_HIGHA:
7473 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7475 case elfcpp::R_POWERPC_TPREL16:
7476 case elfcpp::R_POWERPC_TPREL16_LO:
7477 case elfcpp::R_POWERPC_TPREL16_HI:
7478 case elfcpp::R_POWERPC_TPREL16_HA:
7479 case elfcpp::R_POWERPC_TPREL:
7480 case elfcpp::R_PPC64_TPREL16_HIGHER:
7481 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7482 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7483 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7484 // tls symbol values are relative to tls_segment()->vaddr()
7488 case elfcpp::R_PPC64_DTPREL16_DS:
7489 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7490 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7491 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7492 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7493 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7495 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7496 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7498 case elfcpp::R_POWERPC_DTPREL16:
7499 case elfcpp::R_POWERPC_DTPREL16_LO:
7500 case elfcpp::R_POWERPC_DTPREL16_HI:
7501 case elfcpp::R_POWERPC_DTPREL16_HA:
7502 case elfcpp::R_POWERPC_DTPREL:
7503 case elfcpp::R_PPC64_DTPREL16_HIGH:
7504 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7505 // tls symbol values are relative to tls_segment()->vaddr()
7506 value -= dtp_offset;
7509 case elfcpp::R_PPC64_ADDR64_LOCAL:
7511 value += object->ppc64_local_entry_offset(gsym);
7513 value += object->ppc64_local_entry_offset(r_sym);
7520 Insn branch_bit = 0;
7523 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7524 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7525 branch_bit = 1 << 21;
7526 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7527 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7529 Insn* iview = reinterpret_cast<Insn*>(view);
7530 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7533 if (this->is_isa_v2)
7535 // Set 'a' bit. This is 0b00010 in BO field for branch
7536 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7537 // for branch on CTR insns (BO == 1a00t or 1a01t).
7538 if ((insn & (0x14 << 21)) == (0x04 << 21))
7540 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7547 // Invert 'y' bit if not the default.
7548 if (static_cast<Signed_address>(value) < 0)
7551 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7561 // Multi-instruction sequences that access the TOC can be
7562 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7563 // to nop; addi rb,r2,x;
7569 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7570 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7571 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7572 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7573 case elfcpp::R_POWERPC_GOT16_HA:
7574 case elfcpp::R_PPC64_TOC16_HA:
7575 if (parameters->options().toc_optimize())
7577 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7578 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7579 if ((insn & ((0x3f << 26) | 0x1f << 16))
7580 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7581 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7582 _("toc optimization is not supported "
7583 "for %#08x instruction"), insn);
7584 else if (value + 0x8000 < 0x10000)
7586 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
7592 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7593 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7594 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7595 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7596 case elfcpp::R_POWERPC_GOT16_LO:
7597 case elfcpp::R_PPC64_GOT16_LO_DS:
7598 case elfcpp::R_PPC64_TOC16_LO:
7599 case elfcpp::R_PPC64_TOC16_LO_DS:
7600 if (parameters->options().toc_optimize())
7602 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7603 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7604 if (!ok_lo_toc_insn(insn))
7605 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7606 _("toc optimization is not supported "
7607 "for %#08x instruction"), insn);
7608 else if (value + 0x8000 < 0x10000)
7610 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
7612 // Transform addic to addi when we change reg.
7613 insn &= ~((0x3f << 26) | (0x1f << 16));
7614 insn |= (14u << 26) | (2 << 16);
7618 insn &= ~(0x1f << 16);
7621 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
7628 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
7629 elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr);
7632 case elfcpp::R_POWERPC_ADDR32:
7633 case elfcpp::R_POWERPC_UADDR32:
7635 overflow = Reloc::CHECK_BITFIELD;
7638 case elfcpp::R_POWERPC_REL32:
7640 overflow = Reloc::CHECK_SIGNED;
7643 case elfcpp::R_POWERPC_UADDR16:
7644 overflow = Reloc::CHECK_BITFIELD;
7647 case elfcpp::R_POWERPC_ADDR16:
7648 // We really should have three separate relocations,
7649 // one for 16-bit data, one for insns with 16-bit signed fields,
7650 // and one for insns with 16-bit unsigned fields.
7651 overflow = Reloc::CHECK_BITFIELD;
7652 if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
7653 overflow = Reloc::CHECK_LOW_INSN;
7656 case elfcpp::R_POWERPC_ADDR16_HI:
7657 case elfcpp::R_POWERPC_ADDR16_HA:
7658 case elfcpp::R_POWERPC_GOT16_HI:
7659 case elfcpp::R_POWERPC_GOT16_HA:
7660 case elfcpp::R_POWERPC_PLT16_HI:
7661 case elfcpp::R_POWERPC_PLT16_HA:
7662 case elfcpp::R_POWERPC_SECTOFF_HI:
7663 case elfcpp::R_POWERPC_SECTOFF_HA:
7664 case elfcpp::R_PPC64_TOC16_HI:
7665 case elfcpp::R_PPC64_TOC16_HA:
7666 case elfcpp::R_PPC64_PLTGOT16_HI:
7667 case elfcpp::R_PPC64_PLTGOT16_HA:
7668 case elfcpp::R_POWERPC_TPREL16_HI:
7669 case elfcpp::R_POWERPC_TPREL16_HA:
7670 case elfcpp::R_POWERPC_DTPREL16_HI:
7671 case elfcpp::R_POWERPC_DTPREL16_HA:
7672 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7673 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7674 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7675 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7676 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7677 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7678 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7679 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7680 case elfcpp::R_POWERPC_REL16_HI:
7681 case elfcpp::R_POWERPC_REL16_HA:
7683 overflow = Reloc::CHECK_HIGH_INSN;
7686 case elfcpp::R_POWERPC_REL16:
7687 case elfcpp::R_PPC64_TOC16:
7688 case elfcpp::R_POWERPC_GOT16:
7689 case elfcpp::R_POWERPC_SECTOFF:
7690 case elfcpp::R_POWERPC_TPREL16:
7691 case elfcpp::R_POWERPC_DTPREL16:
7692 case elfcpp::R_POWERPC_GOT_TLSGD16:
7693 case elfcpp::R_POWERPC_GOT_TLSLD16:
7694 case elfcpp::R_POWERPC_GOT_TPREL16:
7695 case elfcpp::R_POWERPC_GOT_DTPREL16:
7696 overflow = Reloc::CHECK_LOW_INSN;
7699 case elfcpp::R_POWERPC_ADDR24:
7700 case elfcpp::R_POWERPC_ADDR14:
7701 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7702 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7703 case elfcpp::R_PPC64_ADDR16_DS:
7704 case elfcpp::R_POWERPC_REL24:
7705 case elfcpp::R_PPC_PLTREL24:
7706 case elfcpp::R_PPC_LOCAL24PC:
7707 case elfcpp::R_PPC64_TPREL16_DS:
7708 case elfcpp::R_PPC64_DTPREL16_DS:
7709 case elfcpp::R_PPC64_TOC16_DS:
7710 case elfcpp::R_PPC64_GOT16_DS:
7711 case elfcpp::R_PPC64_SECTOFF_DS:
7712 case elfcpp::R_POWERPC_REL14:
7713 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7714 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7715 overflow = Reloc::CHECK_SIGNED;
7719 if (overflow == Reloc::CHECK_LOW_INSN
7720 || overflow == Reloc::CHECK_HIGH_INSN)
7722 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
7723 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
7725 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
7726 overflow = Reloc::CHECK_BITFIELD;
7727 else if (overflow == Reloc::CHECK_LOW_INSN
7728 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
7729 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
7730 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
7731 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
7732 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
7733 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
7734 overflow = Reloc::CHECK_UNSIGNED;
7736 overflow = Reloc::CHECK_SIGNED;
7739 typename Powerpc_relocate_functions<size, big_endian>::Status status
7740 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
7743 case elfcpp::R_POWERPC_NONE:
7744 case elfcpp::R_POWERPC_TLS:
7745 case elfcpp::R_POWERPC_GNU_VTINHERIT:
7746 case elfcpp::R_POWERPC_GNU_VTENTRY:
7749 case elfcpp::R_PPC64_ADDR64:
7750 case elfcpp::R_PPC64_REL64:
7751 case elfcpp::R_PPC64_TOC:
7752 case elfcpp::R_PPC64_ADDR64_LOCAL:
7753 Reloc::addr64(view, value);
7756 case elfcpp::R_POWERPC_TPREL:
7757 case elfcpp::R_POWERPC_DTPREL:
7759 Reloc::addr64(view, value);
7761 status = Reloc::addr32(view, value, overflow);
7764 case elfcpp::R_PPC64_UADDR64:
7765 Reloc::addr64_u(view, value);
7768 case elfcpp::R_POWERPC_ADDR32:
7769 status = Reloc::addr32(view, value, overflow);
7772 case elfcpp::R_POWERPC_REL32:
7773 case elfcpp::R_POWERPC_UADDR32:
7774 status = Reloc::addr32_u(view, value, overflow);
7777 case elfcpp::R_POWERPC_ADDR24:
7778 case elfcpp::R_POWERPC_REL24:
7779 case elfcpp::R_PPC_PLTREL24:
7780 case elfcpp::R_PPC_LOCAL24PC:
7781 status = Reloc::addr24(view, value, overflow);
7784 case elfcpp::R_POWERPC_GOT_DTPREL16:
7785 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7786 case elfcpp::R_POWERPC_GOT_TPREL16:
7787 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7790 // On ppc64 these are all ds form
7791 status = Reloc::addr16_ds(view, value, overflow);
7794 case elfcpp::R_POWERPC_ADDR16:
7795 case elfcpp::R_POWERPC_REL16:
7796 case elfcpp::R_PPC64_TOC16:
7797 case elfcpp::R_POWERPC_GOT16:
7798 case elfcpp::R_POWERPC_SECTOFF:
7799 case elfcpp::R_POWERPC_TPREL16:
7800 case elfcpp::R_POWERPC_DTPREL16:
7801 case elfcpp::R_POWERPC_GOT_TLSGD16:
7802 case elfcpp::R_POWERPC_GOT_TLSLD16:
7803 case elfcpp::R_POWERPC_ADDR16_LO:
7804 case elfcpp::R_POWERPC_REL16_LO:
7805 case elfcpp::R_PPC64_TOC16_LO:
7806 case elfcpp::R_POWERPC_GOT16_LO:
7807 case elfcpp::R_POWERPC_SECTOFF_LO:
7808 case elfcpp::R_POWERPC_TPREL16_LO:
7809 case elfcpp::R_POWERPC_DTPREL16_LO:
7810 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7811 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7812 status = Reloc::addr16(view, value, overflow);
7815 case elfcpp::R_POWERPC_UADDR16:
7816 status = Reloc::addr16_u(view, value, overflow);
7819 case elfcpp::R_PPC64_ADDR16_HIGH:
7820 case elfcpp::R_PPC64_TPREL16_HIGH:
7821 case elfcpp::R_PPC64_DTPREL16_HIGH:
7823 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7825 case elfcpp::R_POWERPC_ADDR16_HI:
7826 case elfcpp::R_POWERPC_REL16_HI:
7827 case elfcpp::R_PPC64_TOC16_HI:
7828 case elfcpp::R_POWERPC_GOT16_HI:
7829 case elfcpp::R_POWERPC_SECTOFF_HI:
7830 case elfcpp::R_POWERPC_TPREL16_HI:
7831 case elfcpp::R_POWERPC_DTPREL16_HI:
7832 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7833 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7834 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7835 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7836 Reloc::addr16_hi(view, value);
7839 case elfcpp::R_PPC64_ADDR16_HIGHA:
7840 case elfcpp::R_PPC64_TPREL16_HIGHA:
7841 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7843 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7845 case elfcpp::R_POWERPC_ADDR16_HA:
7846 case elfcpp::R_POWERPC_REL16_HA:
7847 case elfcpp::R_PPC64_TOC16_HA:
7848 case elfcpp::R_POWERPC_GOT16_HA:
7849 case elfcpp::R_POWERPC_SECTOFF_HA:
7850 case elfcpp::R_POWERPC_TPREL16_HA:
7851 case elfcpp::R_POWERPC_DTPREL16_HA:
7852 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7853 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7854 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7855 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7856 Reloc::addr16_ha(view, value);
7859 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7861 // R_PPC_EMB_NADDR16_LO
7863 case elfcpp::R_PPC64_ADDR16_HIGHER:
7864 case elfcpp::R_PPC64_TPREL16_HIGHER:
7865 Reloc::addr16_hi2(view, value);
7868 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7870 // R_PPC_EMB_NADDR16_HI
7872 case elfcpp::R_PPC64_ADDR16_HIGHERA:
7873 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7874 Reloc::addr16_ha2(view, value);
7877 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7879 // R_PPC_EMB_NADDR16_HA
7881 case elfcpp::R_PPC64_ADDR16_HIGHEST:
7882 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7883 Reloc::addr16_hi3(view, value);
7886 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7890 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
7891 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7892 Reloc::addr16_ha3(view, value);
7895 case elfcpp::R_PPC64_DTPREL16_DS:
7896 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7898 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7900 case elfcpp::R_PPC64_TPREL16_DS:
7901 case elfcpp::R_PPC64_TPREL16_LO_DS:
7903 // R_PPC_TLSGD, R_PPC_TLSLD
7905 case elfcpp::R_PPC64_ADDR16_DS:
7906 case elfcpp::R_PPC64_ADDR16_LO_DS:
7907 case elfcpp::R_PPC64_TOC16_DS:
7908 case elfcpp::R_PPC64_TOC16_LO_DS:
7909 case elfcpp::R_PPC64_GOT16_DS:
7910 case elfcpp::R_PPC64_GOT16_LO_DS:
7911 case elfcpp::R_PPC64_SECTOFF_DS:
7912 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7913 status = Reloc::addr16_ds(view, value, overflow);
7916 case elfcpp::R_POWERPC_ADDR14:
7917 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7918 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7919 case elfcpp::R_POWERPC_REL14:
7920 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7921 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7922 status = Reloc::addr14(view, value, overflow);
7925 case elfcpp::R_POWERPC_COPY:
7926 case elfcpp::R_POWERPC_GLOB_DAT:
7927 case elfcpp::R_POWERPC_JMP_SLOT:
7928 case elfcpp::R_POWERPC_RELATIVE:
7929 case elfcpp::R_POWERPC_DTPMOD:
7930 case elfcpp::R_PPC64_JMP_IREL:
7931 case elfcpp::R_POWERPC_IRELATIVE:
7932 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7933 _("unexpected reloc %u in object file"),
7937 case elfcpp::R_PPC_EMB_SDA21:
7942 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7946 case elfcpp::R_PPC_EMB_SDA2I16:
7947 case elfcpp::R_PPC_EMB_SDA2REL:
7950 // R_PPC64_TLSGD, R_PPC64_TLSLD
7953 case elfcpp::R_POWERPC_PLT32:
7954 case elfcpp::R_POWERPC_PLTREL32:
7955 case elfcpp::R_POWERPC_PLT16_LO:
7956 case elfcpp::R_POWERPC_PLT16_HI:
7957 case elfcpp::R_POWERPC_PLT16_HA:
7958 case elfcpp::R_PPC_SDAREL16:
7959 case elfcpp::R_POWERPC_ADDR30:
7960 case elfcpp::R_PPC64_PLT64:
7961 case elfcpp::R_PPC64_PLTREL64:
7962 case elfcpp::R_PPC64_PLTGOT16:
7963 case elfcpp::R_PPC64_PLTGOT16_LO:
7964 case elfcpp::R_PPC64_PLTGOT16_HI:
7965 case elfcpp::R_PPC64_PLTGOT16_HA:
7966 case elfcpp::R_PPC64_PLT16_LO_DS:
7967 case elfcpp::R_PPC64_PLTGOT16_DS:
7968 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
7969 case elfcpp::R_PPC_EMB_RELSDA:
7970 case elfcpp::R_PPC_TOC16:
7973 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7974 _("unsupported reloc %u"),
7978 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
7981 && gsym->is_undefined()
7982 && is_branch_reloc(r_type))))
7984 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7985 _("relocation overflow"));
7987 gold_info(_("try relinking with a smaller --stub-group-size"));
7993 // Relocate section data.
7995 template<int size, bool big_endian>
7997 Target_powerpc<size, big_endian>::relocate_section(
7998 const Relocate_info<size, big_endian>* relinfo,
7999 unsigned int sh_type,
8000 const unsigned char* prelocs,
8002 Output_section* output_section,
8003 bool needs_special_offset_handling,
8004 unsigned char* view,
8006 section_size_type view_size,
8007 const Reloc_symbol_changes* reloc_symbol_changes)
8009 typedef Target_powerpc<size, big_endian> Powerpc;
8010 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
8011 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
8012 Powerpc_comdat_behavior;
8014 gold_assert(sh_type == elfcpp::SHT_RELA);
8016 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
8017 Powerpc_relocate, Powerpc_comdat_behavior>(
8023 needs_special_offset_handling,
8027 reloc_symbol_changes);
8030 class Powerpc_scan_relocatable_reloc
8033 // Return the strategy to use for a local symbol which is not a
8034 // section symbol, given the relocation type.
8035 inline Relocatable_relocs::Reloc_strategy
8036 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
8038 if (r_type == 0 && r_sym == 0)
8039 return Relocatable_relocs::RELOC_DISCARD;
8040 return Relocatable_relocs::RELOC_COPY;
8043 // Return the strategy to use for a local symbol which is a section
8044 // symbol, given the relocation type.
8045 inline Relocatable_relocs::Reloc_strategy
8046 local_section_strategy(unsigned int, Relobj*)
8048 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
8051 // Return the strategy to use for a global symbol, given the
8052 // relocation type, the object, and the symbol index.
8053 inline Relocatable_relocs::Reloc_strategy
8054 global_strategy(unsigned int r_type, Relobj*, unsigned int)
8056 if (r_type == elfcpp::R_PPC_PLTREL24)
8057 return Relocatable_relocs::RELOC_SPECIAL;
8058 return Relocatable_relocs::RELOC_COPY;
8062 // Scan the relocs during a relocatable link.
8064 template<int size, bool big_endian>
8066 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
8067 Symbol_table* symtab,
8069 Sized_relobj_file<size, big_endian>* object,
8070 unsigned int data_shndx,
8071 unsigned int sh_type,
8072 const unsigned char* prelocs,
8074 Output_section* output_section,
8075 bool needs_special_offset_handling,
8076 size_t local_symbol_count,
8077 const unsigned char* plocal_symbols,
8078 Relocatable_relocs* rr)
8080 gold_assert(sh_type == elfcpp::SHT_RELA);
8082 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
8083 Powerpc_scan_relocatable_reloc>(
8091 needs_special_offset_handling,
8097 // Emit relocations for a section.
8098 // This is a modified version of the function by the same name in
8099 // target-reloc.h. Using relocate_special_relocatable for
8100 // R_PPC_PLTREL24 would require duplication of the entire body of the
8101 // loop, so we may as well duplicate the whole thing.
8103 template<int size, bool big_endian>
8105 Target_powerpc<size, big_endian>::relocate_relocs(
8106 const Relocate_info<size, big_endian>* relinfo,
8107 unsigned int sh_type,
8108 const unsigned char* prelocs,
8110 Output_section* output_section,
8111 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
8112 const Relocatable_relocs* rr,
8114 Address view_address,
8116 unsigned char* reloc_view,
8117 section_size_type reloc_view_size)
8119 gold_assert(sh_type == elfcpp::SHT_RELA);
8121 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
8123 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
8125 const int reloc_size
8126 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
8128 Powerpc_relobj<size, big_endian>* const object
8129 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
8130 const unsigned int local_count = object->local_symbol_count();
8131 unsigned int got2_shndx = object->got2_shndx();
8132 Address got2_addend = 0;
8133 if (got2_shndx != 0)
8135 got2_addend = object->get_output_section_offset(got2_shndx);
8136 gold_assert(got2_addend != invalid_address);
8139 unsigned char* pwrite = reloc_view;
8140 bool zap_next = false;
8141 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
8143 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
8144 if (strategy == Relocatable_relocs::RELOC_DISCARD)
8147 Reltype reloc(prelocs);
8148 Reltype_write reloc_write(pwrite);
8150 Address offset = reloc.get_r_offset();
8151 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
8152 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
8153 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
8154 const unsigned int orig_r_sym = r_sym;
8155 typename elfcpp::Elf_types<size>::Elf_Swxword addend
8156 = reloc.get_r_addend();
8157 const Symbol* gsym = NULL;
8161 // We could arrange to discard these and other relocs for
8162 // tls optimised sequences in the strategy methods, but for
8163 // now do as BFD ld does.
8164 r_type = elfcpp::R_POWERPC_NONE;
8168 // Get the new symbol index.
8169 Output_section* os = NULL;
8170 if (r_sym < local_count)
8174 case Relocatable_relocs::RELOC_COPY:
8175 case Relocatable_relocs::RELOC_SPECIAL:
8178 r_sym = object->symtab_index(r_sym);
8179 gold_assert(r_sym != -1U);
8183 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
8185 // We are adjusting a section symbol. We need to find
8186 // the symbol table index of the section symbol for
8187 // the output section corresponding to input section
8188 // in which this symbol is defined.
8189 gold_assert(r_sym < local_count);
8191 unsigned int shndx =
8192 object->local_symbol_input_shndx(r_sym, &is_ordinary);
8193 gold_assert(is_ordinary);
8194 os = object->output_section(shndx);
8195 gold_assert(os != NULL);
8196 gold_assert(os->needs_symtab_index());
8197 r_sym = os->symtab_index();
8207 gsym = object->global_symbol(r_sym);
8208 gold_assert(gsym != NULL);
8209 if (gsym->is_forwarder())
8210 gsym = relinfo->symtab->resolve_forwards(gsym);
8212 gold_assert(gsym->has_symtab_index());
8213 r_sym = gsym->symtab_index();
8216 // Get the new offset--the location in the output section where
8217 // this relocation should be applied.
8218 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8219 offset += offset_in_output_section;
8222 section_offset_type sot_offset =
8223 convert_types<section_offset_type, Address>(offset);
8224 section_offset_type new_sot_offset =
8225 output_section->output_offset(object, relinfo->data_shndx,
8227 gold_assert(new_sot_offset != -1);
8228 offset = new_sot_offset;
8231 // In an object file, r_offset is an offset within the section.
8232 // In an executable or dynamic object, generated by
8233 // --emit-relocs, r_offset is an absolute address.
8234 if (!parameters->options().relocatable())
8236 offset += view_address;
8237 if (static_cast<Address>(offset_in_output_section) != invalid_address)
8238 offset -= offset_in_output_section;
8241 // Handle the reloc addend based on the strategy.
8242 if (strategy == Relocatable_relocs::RELOC_COPY)
8244 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
8246 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
8247 gold_assert(os != NULL);
8248 addend = psymval->value(object, addend) - os->address();
8250 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
8252 if (addend >= 32768)
8253 addend += got2_addend;
8258 if (!parameters->options().relocatable())
8260 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8261 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
8262 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
8263 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
8265 // First instruction of a global dynamic sequence,
8267 const bool final = gsym == NULL || gsym->final_value_is_known();
8268 switch (this->optimize_tls_gd(final))
8270 case tls::TLSOPT_TO_IE:
8271 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
8272 - elfcpp::R_POWERPC_GOT_TLSGD16);
8274 case tls::TLSOPT_TO_LE:
8275 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8276 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
8277 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8280 r_type = elfcpp::R_POWERPC_NONE;
8281 offset -= 2 * big_endian;
8288 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8289 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
8290 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
8291 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
8293 // First instruction of a local dynamic sequence,
8295 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8297 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8298 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
8300 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8301 const Output_section* os = relinfo->layout->tls_segment()
8303 gold_assert(os != NULL);
8304 gold_assert(os->needs_symtab_index());
8305 r_sym = os->symtab_index();
8306 addend = dtp_offset;
8310 r_type = elfcpp::R_POWERPC_NONE;
8311 offset -= 2 * big_endian;
8315 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8316 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
8317 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
8318 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
8320 // First instruction of initial exec sequence.
8321 const bool final = gsym == NULL || gsym->final_value_is_known();
8322 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8324 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8325 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
8326 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8329 r_type = elfcpp::R_POWERPC_NONE;
8330 offset -= 2 * big_endian;
8334 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
8335 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
8337 // Second instruction of a global dynamic sequence,
8338 // the __tls_get_addr call
8339 const bool final = gsym == NULL || gsym->final_value_is_known();
8340 switch (this->optimize_tls_gd(final))
8342 case tls::TLSOPT_TO_IE:
8343 r_type = elfcpp::R_POWERPC_NONE;
8346 case tls::TLSOPT_TO_LE:
8347 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8348 offset += 2 * big_endian;
8355 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
8356 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
8358 // Second instruction of a local dynamic sequence,
8359 // the __tls_get_addr call
8360 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
8362 const Output_section* os = relinfo->layout->tls_segment()
8364 gold_assert(os != NULL);
8365 gold_assert(os->needs_symtab_index());
8366 r_sym = os->symtab_index();
8367 addend = dtp_offset;
8368 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8369 offset += 2 * big_endian;
8373 else if (r_type == elfcpp::R_POWERPC_TLS)
8375 // Second instruction of an initial exec sequence
8376 const bool final = gsym == NULL || gsym->final_value_is_known();
8377 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
8379 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8380 offset += 2 * big_endian;
8385 reloc_write.put_r_offset(offset);
8386 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
8387 reloc_write.put_r_addend(addend);
8389 pwrite += reloc_size;
8392 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
8393 == reloc_view_size);
8396 // Return the value to use for a dynamic symbol which requires special
8397 // treatment. This is how we support equality comparisons of function
8398 // pointers across shared library boundaries, as described in the
8399 // processor specific ABI supplement.
8401 template<int size, bool big_endian>
8403 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
8407 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
8408 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8409 p != this->stub_tables_.end();
8412 Address off = (*p)->find_plt_call_entry(gsym);
8413 if (off != invalid_address)
8414 return (*p)->stub_address() + off;
8417 else if (this->abiversion() >= 2)
8419 Address off = this->glink_section()->find_global_entry(gsym);
8420 if (off != invalid_address)
8421 return this->glink_section()->global_entry_address() + off;
8426 // Return the PLT address to use for a local symbol.
8427 template<int size, bool big_endian>
8429 Target_powerpc<size, big_endian>::do_plt_address_for_local(
8430 const Relobj* object,
8431 unsigned int symndx) const
8435 const Sized_relobj<size, big_endian>* relobj
8436 = static_cast<const Sized_relobj<size, big_endian>*>(object);
8437 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8438 p != this->stub_tables_.end();
8441 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
8443 if (off != invalid_address)
8444 return (*p)->stub_address() + off;
8450 // Return the PLT address to use for a global symbol.
8451 template<int size, bool big_endian>
8453 Target_powerpc<size, big_endian>::do_plt_address_for_global(
8454 const Symbol* gsym) const
8458 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
8459 p != this->stub_tables_.end();
8462 Address off = (*p)->find_plt_call_entry(gsym);
8463 if (off != invalid_address)
8464 return (*p)->stub_address() + off;
8467 else if (this->abiversion() >= 2)
8469 Address off = this->glink_section()->find_global_entry(gsym);
8470 if (off != invalid_address)
8471 return this->glink_section()->global_entry_address() + off;
8476 // Return the offset to use for the GOT_INDX'th got entry which is
8477 // for a local tls symbol specified by OBJECT, SYMNDX.
8478 template<int size, bool big_endian>
8480 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
8481 const Relobj* object,
8482 unsigned int symndx,
8483 unsigned int got_indx) const
8485 const Powerpc_relobj<size, big_endian>* ppc_object
8486 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
8487 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
8489 for (Got_type got_type = GOT_TYPE_TLSGD;
8490 got_type <= GOT_TYPE_TPREL;
8491 got_type = Got_type(got_type + 1))
8492 if (ppc_object->local_has_got_offset(symndx, got_type))
8494 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
8495 if (got_type == GOT_TYPE_TLSGD)
8497 if (off == got_indx * (size / 8))
8499 if (got_type == GOT_TYPE_TPREL)
8509 // Return the offset to use for the GOT_INDX'th got entry which is
8510 // for global tls symbol GSYM.
8511 template<int size, bool big_endian>
8513 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
8515 unsigned int got_indx) const
8517 if (gsym->type() == elfcpp::STT_TLS)
8519 for (Got_type got_type = GOT_TYPE_TLSGD;
8520 got_type <= GOT_TYPE_TPREL;
8521 got_type = Got_type(got_type + 1))
8522 if (gsym->has_got_offset(got_type))
8524 unsigned int off = gsym->got_offset(got_type);
8525 if (got_type == GOT_TYPE_TLSGD)
8527 if (off == got_indx * (size / 8))
8529 if (got_type == GOT_TYPE_TPREL)
8539 // The selector for powerpc object files.
8541 template<int size, bool big_endian>
8542 class Target_selector_powerpc : public Target_selector
8545 Target_selector_powerpc()
8546 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
8549 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
8550 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
8552 ? (big_endian ? "elf64ppc" : "elf64lppc")
8553 : (big_endian ? "elf32ppc" : "elf32lppc")))
8557 do_instantiate_target()
8558 { return new Target_powerpc<size, big_endian>(); }
8561 Target_selector_powerpc<32, true> target_selector_ppc32;
8562 Target_selector_powerpc<32, false> target_selector_ppc32le;
8563 Target_selector_powerpc<64, true> target_selector_ppc64;
8564 Target_selector_powerpc<64, false> target_selector_ppc64le;
8566 // Instantiate these constants for -O0
8567 template<int size, bool big_endian>
8568 const int Output_data_glink<size, big_endian>::pltresolve_size;
8569 template<int size, bool big_endian>
8570 const typename Output_data_glink<size, big_endian>::Address
8571 Output_data_glink<size, big_endian>::invalid_address;
8572 template<int size, bool big_endian>
8573 const typename Stub_table<size, big_endian>::Address
8574 Stub_table<size, big_endian>::invalid_address;
8575 template<int size, bool big_endian>
8576 const typename Target_powerpc<size, big_endian>::Address
8577 Target_powerpc<size, big_endian>::invalid_address;
8579 } // End anonymous namespace.