1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012, 2013 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>
66 is_branch_reloc(unsigned int r_type);
68 template<int size, bool big_endian>
69 class Powerpc_relobj : public Sized_relobj_file<size, big_endian>
72 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
73 typedef Unordered_set<Section_id, Section_id_hash> Section_refs;
74 typedef Unordered_map<Address, Section_refs> Access_from;
76 Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset,
77 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
78 : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
79 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
80 opd_ent_(), access_from_map_(), has14_(), stub_table_()
86 // The .got2 section shndx.
91 return this->special_;
96 // The .opd section shndx.
103 return this->special_;
106 // Init OPD entry arrays.
108 init_opd(size_t opd_size)
110 size_t count = this->opd_ent_ndx(opd_size);
111 this->opd_ent_.resize(count);
114 // Return section and offset of function entry for .opd + R_OFF.
116 get_opd_ent(Address r_off, Address* value = NULL) const
118 size_t ndx = this->opd_ent_ndx(r_off);
119 gold_assert(ndx < this->opd_ent_.size());
120 gold_assert(this->opd_ent_[ndx].shndx != 0);
122 *value = this->opd_ent_[ndx].off;
123 return this->opd_ent_[ndx].shndx;
126 // Set section and offset of function entry for .opd + R_OFF.
128 set_opd_ent(Address r_off, unsigned int shndx, Address value)
130 size_t ndx = this->opd_ent_ndx(r_off);
131 gold_assert(ndx < this->opd_ent_.size());
132 this->opd_ent_[ndx].shndx = shndx;
133 this->opd_ent_[ndx].off = value;
136 // Return discard flag for .opd + R_OFF.
138 get_opd_discard(Address r_off) const
140 size_t ndx = this->opd_ent_ndx(r_off);
141 gold_assert(ndx < this->opd_ent_.size());
142 return this->opd_ent_[ndx].discard;
145 // Set discard flag for .opd + R_OFF.
147 set_opd_discard(Address r_off)
149 size_t ndx = this->opd_ent_ndx(r_off);
150 gold_assert(ndx < this->opd_ent_.size());
151 this->opd_ent_[ndx].discard = true;
156 { return this->opd_valid_; }
160 { this->opd_valid_ = true; }
162 // Examine .rela.opd to build info about function entry points.
164 scan_opd_relocs(size_t reloc_count,
165 const unsigned char* prelocs,
166 const unsigned char* plocal_syms);
168 // Perform the Sized_relobj_file method, then set up opd info from
171 do_read_relocs(Read_relocs_data*);
174 do_find_special_sections(Read_symbols_data* sd);
176 // Adjust this local symbol value. Return false if the symbol
177 // should be discarded from the output file.
179 do_adjust_local_symbol(Symbol_value<size>* lv) const
181 if (size == 64 && this->opd_shndx() != 0)
184 if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
186 if (this->get_opd_discard(lv->input_value()))
194 { return &this->access_from_map_; }
196 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
197 // section at DST_OFF.
199 add_reference(Object* src_obj,
200 unsigned int src_indx,
201 typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
203 Section_id src_id(src_obj, src_indx);
204 this->access_from_map_[dst_off].insert(src_id);
207 // Add a reference to the code section specified by the .opd entry
210 add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
212 size_t ndx = this->opd_ent_ndx(dst_off);
213 if (ndx >= this->opd_ent_.size())
214 this->opd_ent_.resize(ndx + 1);
215 this->opd_ent_[ndx].gc_mark = true;
219 process_gc_mark(Symbol_table* symtab)
221 for (size_t i = 0; i < this->opd_ent_.size(); i++)
222 if (this->opd_ent_[i].gc_mark)
224 unsigned int shndx = this->opd_ent_[i].shndx;
225 symtab->gc()->worklist().push(Section_id(this, shndx));
229 // Return offset in output GOT section that this object will use
230 // as a TOC pointer. Won't be just a constant with multi-toc support.
232 toc_base_offset() const
236 set_has_small_toc_reloc()
237 { has_small_toc_reloc_ = true; }
240 has_small_toc_reloc() const
241 { return has_small_toc_reloc_; }
244 set_has_14bit_branch(unsigned int shndx)
246 if (shndx >= this->has14_.size())
247 this->has14_.resize(shndx + 1);
248 this->has14_[shndx] = true;
252 has_14bit_branch(unsigned int shndx) const
253 { return shndx < this->has14_.size() && this->has14_[shndx]; }
256 set_stub_table(unsigned int shndx, Stub_table<size, big_endian>* stub_table)
258 if (shndx >= this->stub_table_.size())
259 this->stub_table_.resize(shndx + 1);
260 this->stub_table_[shndx] = stub_table;
263 Stub_table<size, big_endian>*
264 stub_table(unsigned int shndx)
266 if (shndx < this->stub_table_.size())
267 return this->stub_table_[shndx];
280 // Return index into opd_ent_ array for .opd entry at OFF.
281 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
282 // apart when the language doesn't use the last 8-byte word, the
283 // environment pointer. Thus dividing the entry section offset by
284 // 16 will give an index into opd_ent_ that works for either layout
285 // of .opd. (It leaves some elements of the vector unused when .opd
286 // entries are spaced 24 bytes apart, but we don't know the spacing
287 // until relocations are processed, and in any case it is possible
288 // for an object to have some entries spaced 16 bytes apart and
289 // others 24 bytes apart.)
291 opd_ent_ndx(size_t off) const
294 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
295 unsigned int special_;
297 // For 64-bit, whether this object uses small model relocs to access
299 bool has_small_toc_reloc_;
301 // Set at the start of gc_process_relocs, when we know opd_ent_
302 // vector is valid. The flag could be made atomic and set in
303 // do_read_relocs with memory_order_release and then tested with
304 // memory_order_acquire, potentially resulting in fewer entries in
308 // The first 8-byte word of an OPD entry gives the address of the
309 // entry point of the function. Relocatable object files have a
310 // relocation on this word. The following vector records the
311 // section and offset specified by these relocations.
312 std::vector<Opd_ent> opd_ent_;
314 // References made to this object's .opd section when running
315 // gc_process_relocs for another object, before the opd_ent_ vector
316 // is valid for this object.
317 Access_from access_from_map_;
319 // Whether input section has a 14-bit branch reloc.
320 std::vector<bool> has14_;
322 // The stub table to use for a given input section.
323 std::vector<Stub_table<size, big_endian>*> stub_table_;
326 template<int size, bool big_endian>
327 class Powerpc_dynobj : public Sized_dynobj<size, big_endian>
330 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
332 Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset,
333 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
334 : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr),
335 opd_shndx_(0), opd_ent_()
341 // Call Sized_dynobj::do_read_symbols to read the symbols then
342 // read .opd from a dynamic object, filling in opd_ent_ vector,
344 do_read_symbols(Read_symbols_data*);
346 // The .opd section shndx.
350 return this->opd_shndx_;
353 // The .opd section address.
357 return this->opd_address_;
360 // Init OPD entry arrays.
362 init_opd(size_t opd_size)
364 size_t count = this->opd_ent_ndx(opd_size);
365 this->opd_ent_.resize(count);
368 // Return section and offset of function entry for .opd + R_OFF.
370 get_opd_ent(Address r_off, Address* value = NULL) const
372 size_t ndx = this->opd_ent_ndx(r_off);
373 gold_assert(ndx < this->opd_ent_.size());
374 gold_assert(this->opd_ent_[ndx].shndx != 0);
376 *value = this->opd_ent_[ndx].off;
377 return this->opd_ent_[ndx].shndx;
380 // Set section and offset of function entry for .opd + R_OFF.
382 set_opd_ent(Address r_off, unsigned int shndx, Address value)
384 size_t ndx = this->opd_ent_ndx(r_off);
385 gold_assert(ndx < this->opd_ent_.size());
386 this->opd_ent_[ndx].shndx = shndx;
387 this->opd_ent_[ndx].off = value;
391 // Used to specify extent of executable sections.
394 Sec_info(Address start_, Address len_, unsigned int shndx_)
395 : start(start_), len(len_), shndx(shndx_)
399 operator<(const Sec_info& that) const
400 { return this->start < that.start; }
413 // Return index into opd_ent_ array for .opd entry at OFF.
415 opd_ent_ndx(size_t off) const
418 // For 64-bit the .opd section shndx and address.
419 unsigned int opd_shndx_;
420 Address opd_address_;
422 // The first 8-byte word of an OPD entry gives the address of the
423 // entry point of the function. Records the section and offset
424 // corresponding to the address. Note that in dynamic objects,
425 // offset is *not* relative to the section.
426 std::vector<Opd_ent> opd_ent_;
429 template<int size, bool big_endian>
430 class Target_powerpc : public Sized_target<size, big_endian>
434 Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
435 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
436 typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
437 static const Address invalid_address = static_cast<Address>(0) - 1;
438 // Offset of tp and dtp pointers from start of TLS block.
439 static const Address tp_offset = 0x7000;
440 static const Address dtp_offset = 0x8000;
443 : Sized_target<size, big_endian>(&powerpc_info),
444 got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL),
445 glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY),
446 tlsld_got_offset_(-1U),
447 stub_tables_(), branch_lookup_table_(), branch_info_(),
448 plt_thread_safe_(false)
452 // Process the relocations to determine unreferenced sections for
453 // garbage collection.
455 gc_process_relocs(Symbol_table* symtab,
457 Sized_relobj_file<size, big_endian>* object,
458 unsigned int data_shndx,
459 unsigned int sh_type,
460 const unsigned char* prelocs,
462 Output_section* output_section,
463 bool needs_special_offset_handling,
464 size_t local_symbol_count,
465 const unsigned char* plocal_symbols);
467 // Scan the relocations to look for symbol adjustments.
469 scan_relocs(Symbol_table* symtab,
471 Sized_relobj_file<size, big_endian>* object,
472 unsigned int data_shndx,
473 unsigned int sh_type,
474 const unsigned char* prelocs,
476 Output_section* output_section,
477 bool needs_special_offset_handling,
478 size_t local_symbol_count,
479 const unsigned char* plocal_symbols);
481 // Map input .toc section to output .got section.
483 do_output_section_name(const Relobj*, const char* name, size_t* plen) const
485 if (size == 64 && strcmp(name, ".toc") == 0)
493 // Provide linker defined save/restore functions.
495 define_save_restore_funcs(Layout*, Symbol_table*);
497 // No stubs unless a final link.
500 { return !parameters->options().relocatable(); }
503 do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
506 do_plt_fde_location(const Output_data*, unsigned char*,
507 uint64_t*, off_t*) const;
509 // Stash info about branches, for stub generation.
511 push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
512 unsigned int data_shndx, Address r_offset,
513 unsigned int r_type, unsigned int r_sym, Address addend)
515 Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
516 this->branch_info_.push_back(info);
517 if (r_type == elfcpp::R_POWERPC_REL14
518 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
519 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
520 ppc_object->set_has_14bit_branch(data_shndx);
523 Stub_table<size, big_endian>*
527 do_define_standard_symbols(Symbol_table*, Layout*);
529 // Finalize the sections.
531 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
533 // Return the value to use for a dynamic which requires special
536 do_dynsym_value(const Symbol*) const;
538 // Return the PLT address to use for a local symbol.
540 do_plt_address_for_local(const Relobj*, unsigned int) const;
542 // Return the PLT address to use for a global symbol.
544 do_plt_address_for_global(const Symbol*) const;
546 // Return the offset to use for the GOT_INDX'th got entry which is
547 // for a local tls symbol specified by OBJECT, SYMNDX.
549 do_tls_offset_for_local(const Relobj* object,
551 unsigned int got_indx) const;
553 // Return the offset to use for the GOT_INDX'th got entry which is
554 // for global tls symbol GSYM.
556 do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
559 do_function_location(Symbol_location*) const;
562 do_can_check_for_function_pointers() const
565 // Relocate a section.
567 relocate_section(const Relocate_info<size, big_endian>*,
568 unsigned int sh_type,
569 const unsigned char* prelocs,
571 Output_section* output_section,
572 bool needs_special_offset_handling,
574 Address view_address,
575 section_size_type view_size,
576 const Reloc_symbol_changes*);
578 // Scan the relocs during a relocatable link.
580 scan_relocatable_relocs(Symbol_table* symtab,
582 Sized_relobj_file<size, big_endian>* object,
583 unsigned int data_shndx,
584 unsigned int sh_type,
585 const unsigned char* prelocs,
587 Output_section* output_section,
588 bool needs_special_offset_handling,
589 size_t local_symbol_count,
590 const unsigned char* plocal_symbols,
591 Relocatable_relocs*);
593 // Emit relocations for a section.
595 relocate_relocs(const Relocate_info<size, big_endian>*,
596 unsigned int sh_type,
597 const unsigned char* prelocs,
599 Output_section* output_section,
600 typename elfcpp::Elf_types<size>::Elf_Off
601 offset_in_output_section,
602 const Relocatable_relocs*,
604 Address view_address,
606 unsigned char* reloc_view,
607 section_size_type reloc_view_size);
609 // Return whether SYM is defined by the ABI.
611 do_is_defined_by_abi(const Symbol* sym) const
613 return strcmp(sym->name(), "__tls_get_addr") == 0;
616 // Return the size of the GOT section.
620 gold_assert(this->got_ != NULL);
621 return this->got_->data_size();
624 // Get the PLT section.
625 const Output_data_plt_powerpc<size, big_endian>*
628 gold_assert(this->plt_ != NULL);
632 // Get the IPLT section.
633 const Output_data_plt_powerpc<size, big_endian>*
636 gold_assert(this->iplt_ != NULL);
640 // Get the .glink section.
641 const Output_data_glink<size, big_endian>*
642 glink_section() const
644 gold_assert(this->glink_ != NULL);
648 bool has_glink() const
649 { return this->glink_ != NULL; }
651 // Get the GOT section.
652 const Output_data_got_powerpc<size, big_endian>*
655 gold_assert(this->got_ != NULL);
659 // Get the GOT section, creating it if necessary.
660 Output_data_got_powerpc<size, big_endian>*
661 got_section(Symbol_table*, Layout*);
664 do_make_elf_object(const std::string&, Input_file*, off_t,
665 const elfcpp::Ehdr<size, big_endian>&);
667 // Return the number of entries in the GOT.
669 got_entry_count() const
671 if (this->got_ == NULL)
673 return this->got_size() / (size / 8);
676 // Return the number of entries in the PLT.
678 plt_entry_count() const;
680 // Return the offset of the first non-reserved PLT entry.
682 first_plt_entry_offset() const;
684 // Return the size of each PLT entry.
686 plt_entry_size() const;
688 // Add any special sections for this symbol to the gc work list.
689 // For powerpc64, this adds the code section of a function
692 do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
694 // Handle target specific gc actions when adding a gc reference from
695 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
696 // and DST_OFF. For powerpc64, this adds a referenc to the code
697 // section of a function descriptor.
699 do_gc_add_reference(Symbol_table* symtab,
701 unsigned int src_shndx,
703 unsigned int dst_shndx,
704 Address dst_off) const;
706 typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
709 { return this->stub_tables_; }
711 const Output_data_brlt_powerpc<size, big_endian>*
713 { return this->brlt_section_; }
716 add_branch_lookup_table(Address to)
718 unsigned int off = this->branch_lookup_table_.size() * (size / 8);
719 this->branch_lookup_table_.insert(std::make_pair(to, off));
723 find_branch_lookup_table(Address to)
725 typename Branch_lookup_table::const_iterator p
726 = this->branch_lookup_table_.find(to);
727 return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
731 write_branch_lookup_table(unsigned char *oview)
733 for (typename Branch_lookup_table::const_iterator p
734 = this->branch_lookup_table_.begin();
735 p != this->branch_lookup_table_.end();
738 elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first);
743 plt_thread_safe() const
744 { return this->plt_thread_safe_; }
760 : tls_get_addr_(NOT_EXPECTED),
761 relinfo_(NULL), relnum_(0), r_offset_(0)
766 if (this->tls_get_addr_ != NOT_EXPECTED)
773 if (this->relinfo_ != NULL)
774 gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_,
775 _("missing expected __tls_get_addr call"));
779 expect_tls_get_addr_call(
780 const Relocate_info<size, big_endian>* relinfo,
784 this->tls_get_addr_ = EXPECTED;
785 this->relinfo_ = relinfo;
786 this->relnum_ = relnum;
787 this->r_offset_ = r_offset;
791 expect_tls_get_addr_call()
792 { this->tls_get_addr_ = EXPECTED; }
795 skip_next_tls_get_addr_call()
796 {this->tls_get_addr_ = SKIP; }
799 maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym)
801 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
802 || r_type == elfcpp::R_PPC_PLTREL24)
804 && strcmp(gsym->name(), "__tls_get_addr") == 0);
805 Tls_get_addr last_tls = this->tls_get_addr_;
806 this->tls_get_addr_ = NOT_EXPECTED;
807 if (is_tls_call && last_tls != EXPECTED)
809 else if (!is_tls_call && last_tls != NOT_EXPECTED)
818 // What we're up to regarding calls to __tls_get_addr.
819 // On powerpc, the branch and link insn making a call to
820 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
821 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
822 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
823 // The marker relocation always comes first, and has the same
824 // symbol as the reloc on the insn setting up the __tls_get_addr
825 // argument. This ties the arg setup insn with the call insn,
826 // allowing ld to safely optimize away the call. We check that
827 // every call to __tls_get_addr has a marker relocation, and that
828 // every marker relocation is on a call to __tls_get_addr.
829 Tls_get_addr tls_get_addr_;
830 // Info about the last reloc for error message.
831 const Relocate_info<size, big_endian>* relinfo_;
836 // The class which scans relocations.
837 class Scan : protected Track_tls
840 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
843 : Track_tls(), issued_non_pic_error_(false)
847 get_reference_flags(unsigned int r_type);
850 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
851 Sized_relobj_file<size, big_endian>* object,
852 unsigned int data_shndx,
853 Output_section* output_section,
854 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
855 const elfcpp::Sym<size, big_endian>& lsym,
859 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
860 Sized_relobj_file<size, big_endian>* object,
861 unsigned int data_shndx,
862 Output_section* output_section,
863 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
867 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
869 Sized_relobj_file<size, big_endian>* ,
872 const elfcpp::Rela<size, big_endian>& ,
874 const elfcpp::Sym<size, big_endian>&)
876 // PowerPC64 .opd is not folded, so any identical function text
877 // may be folded and we'll still keep function addresses distinct.
878 // That means no reloc is of concern here.
881 // For 32-bit, conservatively assume anything but calls to
882 // function code might be taking the address of the function.
883 return !is_branch_reloc(r_type);
887 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
889 Sized_relobj_file<size, big_endian>* ,
892 const elfcpp::Rela<size, big_endian>& ,
899 return !is_branch_reloc(r_type);
903 reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object,
904 unsigned int r_type, bool report_err);
908 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
909 unsigned int r_type);
912 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
913 unsigned int r_type, Symbol*);
916 generate_tls_call(Symbol_table* symtab, Layout* layout,
917 Target_powerpc* target);
920 check_non_pic(Relobj*, unsigned int r_type);
922 // Whether we have issued an error about a non-PIC compilation.
923 bool issued_non_pic_error_;
927 symval_for_branch(const Symbol_table* symtab, Address value,
928 const Sized_symbol<size>* gsym,
929 Powerpc_relobj<size, big_endian>* object,
930 unsigned int *dest_shndx);
932 // The class which implements relocation.
933 class Relocate : protected Track_tls
936 // Use 'at' branch hints when true, 'y' when false.
937 // FIXME maybe: set this with an option.
938 static const bool is_isa_v2 = true;
944 // Do a relocation. Return false if the caller should not issue
945 // any warnings about this relocation.
947 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
948 Output_section*, size_t relnum,
949 const elfcpp::Rela<size, big_endian>&,
950 unsigned int r_type, const Sized_symbol<size>*,
951 const Symbol_value<size>*,
953 typename elfcpp::Elf_types<size>::Elf_Addr,
957 class Relocate_comdat_behavior
960 // Decide what the linker should do for relocations that refer to
961 // discarded comdat sections.
962 inline Comdat_behavior
963 get(const char* name)
965 gold::Default_comdat_behavior default_behavior;
966 Comdat_behavior ret = default_behavior.get(name);
967 if (ret == CB_WARNING)
970 && (strcmp(name, ".fixup") == 0
971 || strcmp(name, ".got2") == 0))
974 && (strcmp(name, ".opd") == 0
975 || strcmp(name, ".toc") == 0
976 || strcmp(name, ".toc1") == 0))
983 // A class which returns the size required for a relocation type,
984 // used while scanning relocs during a relocatable link.
985 class Relocatable_size_for_reloc
989 get_size_for_reloc(unsigned int, Relobj*)
996 // Optimize the TLS relocation type based on what we know about the
997 // symbol. IS_FINAL is true if the final address of this symbol is
998 // known at link time.
1000 tls::Tls_optimization
1001 optimize_tls_gd(bool is_final)
1003 // If we are generating a shared library, then we can't do anything
1005 if (parameters->options().shared())
1006 return tls::TLSOPT_NONE;
1009 return tls::TLSOPT_TO_IE;
1010 return tls::TLSOPT_TO_LE;
1013 tls::Tls_optimization
1016 if (parameters->options().shared())
1017 return tls::TLSOPT_NONE;
1019 return tls::TLSOPT_TO_LE;
1022 tls::Tls_optimization
1023 optimize_tls_ie(bool is_final)
1025 if (!is_final || parameters->options().shared())
1026 return tls::TLSOPT_NONE;
1028 return tls::TLSOPT_TO_LE;
1033 make_glink_section(Layout*);
1035 // Create the PLT section.
1037 make_plt_section(Symbol_table*, Layout*);
1040 make_iplt_section(Symbol_table*, Layout*);
1043 make_brlt_section(Layout*);
1045 // Create a PLT entry for a global symbol.
1047 make_plt_entry(Symbol_table*, Layout*, Symbol*);
1049 // Create a PLT entry for a local IFUNC symbol.
1051 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
1052 Sized_relobj_file<size, big_endian>*,
1056 // Create a GOT entry for local dynamic __tls_get_addr.
1058 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
1059 Sized_relobj_file<size, big_endian>* object);
1062 tlsld_got_offset() const
1064 return this->tlsld_got_offset_;
1067 // Get the dynamic reloc section, creating it if necessary.
1069 rela_dyn_section(Layout*);
1071 // Similarly, but for ifunc symbols get the one for ifunc.
1073 rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc);
1075 // Copy a relocation against a global symbol.
1077 copy_reloc(Symbol_table* symtab, Layout* layout,
1078 Sized_relobj_file<size, big_endian>* object,
1079 unsigned int shndx, Output_section* output_section,
1080 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
1082 this->copy_relocs_.copy_reloc(symtab, layout,
1083 symtab->get_sized_symbol<size>(sym),
1084 object, shndx, output_section,
1085 reloc, this->rela_dyn_section(layout));
1088 // Look over all the input sections, deciding where to place stubs.
1090 group_sections(Layout*, const Task*);
1092 // Sort output sections by address.
1093 struct Sort_sections
1096 operator()(const Output_section* sec1, const Output_section* sec2)
1097 { return sec1->address() < sec2->address(); }
1103 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
1104 unsigned int data_shndx,
1106 unsigned int r_type,
1109 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
1110 r_type_(r_type), r_sym_(r_sym), addend_(addend)
1116 // If this branch needs a plt call stub, or a long branch stub, make one.
1118 make_stub(Stub_table<size, big_endian>*,
1119 Stub_table<size, big_endian>*,
1120 Symbol_table*) const;
1123 // The branch location..
1124 Powerpc_relobj<size, big_endian>* object_;
1125 unsigned int shndx_;
1127 // ..and the branch type and destination.
1128 unsigned int r_type_;
1129 unsigned int r_sym_;
1133 // Information about this specific target which we pass to the
1134 // general Target structure.
1135 static Target::Target_info powerpc_info;
1137 // The types of GOT entries needed for this platform.
1138 // These values are exposed to the ABI in an incremental link.
1139 // Do not renumber existing values without changing the version
1140 // number of the .gnu_incremental_inputs section.
1144 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
1145 GOT_TYPE_DTPREL, // entry for @got@dtprel
1146 GOT_TYPE_TPREL // entry for @got@tprel
1150 Output_data_got_powerpc<size, big_endian>* got_;
1151 // The PLT section. This is a container for a table of addresses,
1152 // and their relocations. Each address in the PLT has a dynamic
1153 // relocation (R_*_JMP_SLOT) and each address will have a
1154 // corresponding entry in .glink for lazy resolution of the PLT.
1155 // ppc32 initialises the PLT to point at the .glink entry, while
1156 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1157 // linker adds a stub that loads the PLT entry into ctr then
1158 // branches to ctr. There may be more than one stub for each PLT
1159 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1160 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1161 Output_data_plt_powerpc<size, big_endian>* plt_;
1162 // The IPLT section. Like plt_, this is a container for a table of
1163 // addresses and their relocations, specifically for STT_GNU_IFUNC
1164 // functions that resolve locally (STT_GNU_IFUNC functions that
1165 // don't resolve locally go in PLT). Unlike plt_, these have no
1166 // entry in .glink for lazy resolution, and the relocation section
1167 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1168 // the relocation section may contain relocations against
1169 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1170 // relocation section will appear at the end of other dynamic
1171 // relocations, so that ld.so applies these relocations after other
1172 // dynamic relocations. In a static executable, the relocation
1173 // section is emitted and marked with __rela_iplt_start and
1174 // __rela_iplt_end symbols.
1175 Output_data_plt_powerpc<size, big_endian>* iplt_;
1176 // Section holding long branch destinations.
1177 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
1178 // The .glink section.
1179 Output_data_glink<size, big_endian>* glink_;
1180 // The dynamic reloc section.
1181 Reloc_section* rela_dyn_;
1182 // Relocs saved to avoid a COPY reloc.
1183 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
1184 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1185 unsigned int tlsld_got_offset_;
1187 Stub_tables stub_tables_;
1188 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
1189 Branch_lookup_table branch_lookup_table_;
1191 typedef std::vector<Branch_info> Branches;
1192 Branches branch_info_;
1194 bool plt_thread_safe_;
1198 Target::Target_info Target_powerpc<32, true>::powerpc_info =
1201 true, // is_big_endian
1202 elfcpp::EM_PPC, // machine_code
1203 false, // has_make_symbol
1204 false, // has_resolve
1205 false, // has_code_fill
1206 true, // is_default_stack_executable
1207 false, // can_icf_inline_merge_sections
1209 "/usr/lib/ld.so.1", // dynamic_linker
1210 0x10000000, // default_text_segment_address
1211 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1212 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1213 false, // isolate_execinstr
1215 elfcpp::SHN_UNDEF, // small_common_shndx
1216 elfcpp::SHN_UNDEF, // large_common_shndx
1217 0, // small_common_section_flags
1218 0, // large_common_section_flags
1219 NULL, // attributes_section
1220 NULL, // attributes_vendor
1221 "_start" // entry_symbol_name
1225 Target::Target_info Target_powerpc<32, false>::powerpc_info =
1228 false, // is_big_endian
1229 elfcpp::EM_PPC, // machine_code
1230 false, // has_make_symbol
1231 false, // has_resolve
1232 false, // has_code_fill
1233 true, // is_default_stack_executable
1234 false, // can_icf_inline_merge_sections
1236 "/usr/lib/ld.so.1", // dynamic_linker
1237 0x10000000, // default_text_segment_address
1238 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1239 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1240 false, // isolate_execinstr
1242 elfcpp::SHN_UNDEF, // small_common_shndx
1243 elfcpp::SHN_UNDEF, // large_common_shndx
1244 0, // small_common_section_flags
1245 0, // large_common_section_flags
1246 NULL, // attributes_section
1247 NULL, // attributes_vendor
1248 "_start" // entry_symbol_name
1252 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1255 true, // is_big_endian
1256 elfcpp::EM_PPC64, // machine_code
1257 false, // has_make_symbol
1258 false, // has_resolve
1259 false, // has_code_fill
1260 true, // is_default_stack_executable
1261 false, // can_icf_inline_merge_sections
1263 "/usr/lib/ld.so.1", // dynamic_linker
1264 0x10000000, // default_text_segment_address
1265 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1266 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1267 false, // isolate_execinstr
1269 elfcpp::SHN_UNDEF, // small_common_shndx
1270 elfcpp::SHN_UNDEF, // large_common_shndx
1271 0, // small_common_section_flags
1272 0, // large_common_section_flags
1273 NULL, // attributes_section
1274 NULL, // attributes_vendor
1275 "_start" // entry_symbol_name
1279 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1282 false, // is_big_endian
1283 elfcpp::EM_PPC64, // machine_code
1284 false, // has_make_symbol
1285 false, // has_resolve
1286 false, // has_code_fill
1287 true, // is_default_stack_executable
1288 false, // can_icf_inline_merge_sections
1290 "/usr/lib/ld.so.1", // dynamic_linker
1291 0x10000000, // default_text_segment_address
1292 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1293 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1294 false, // isolate_execinstr
1296 elfcpp::SHN_UNDEF, // small_common_shndx
1297 elfcpp::SHN_UNDEF, // large_common_shndx
1298 0, // small_common_section_flags
1299 0, // large_common_section_flags
1300 NULL, // attributes_section
1301 NULL, // attributes_vendor
1302 "_start" // entry_symbol_name
1306 is_branch_reloc(unsigned int r_type)
1308 return (r_type == elfcpp::R_POWERPC_REL24
1309 || r_type == elfcpp::R_PPC_PLTREL24
1310 || r_type == elfcpp::R_PPC_LOCAL24PC
1311 || r_type == elfcpp::R_POWERPC_REL14
1312 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1313 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1314 || r_type == elfcpp::R_POWERPC_ADDR24
1315 || r_type == elfcpp::R_POWERPC_ADDR14
1316 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1317 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1320 // If INSN is an opcode that may be used with an @tls operand, return
1321 // the transformed insn for TLS optimisation, otherwise return 0. If
1322 // REG is non-zero only match an insn with RB or RA equal to REG.
1324 at_tls_transform(uint32_t insn, unsigned int reg)
1326 if ((insn & (0x3f << 26)) != 31 << 26)
1330 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1331 rtra = insn & ((1 << 26) - (1 << 16));
1332 else if (((insn >> 16) & 0x1f) == reg)
1333 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1337 if ((insn & (0x3ff << 1)) == 266 << 1)
1340 else if ((insn & (0x1f << 1)) == 23 << 1
1341 && ((insn & (0x1f << 6)) < 14 << 6
1342 || ((insn & (0x1f << 6)) >= 16 << 6
1343 && (insn & (0x1f << 6)) < 24 << 6)))
1344 // load and store indexed -> dform
1345 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1346 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1347 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1348 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1349 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1351 insn = (58 << 26) | 2;
1358 // Modified version of symtab.h class Symbol member
1359 // Given a direct absolute or pc-relative static relocation against
1360 // the global symbol, this function returns whether a dynamic relocation
1365 needs_dynamic_reloc(const Symbol* gsym, int flags)
1367 // No dynamic relocations in a static link!
1368 if (parameters->doing_static_link())
1371 // A reference to an undefined symbol from an executable should be
1372 // statically resolved to 0, and does not need a dynamic relocation.
1373 // This matches gnu ld behavior.
1374 if (gsym->is_undefined() && !parameters->options().shared())
1377 // A reference to an absolute symbol does not need a dynamic relocation.
1378 if (gsym->is_absolute())
1381 // An absolute reference within a position-independent output file
1382 // will need a dynamic relocation.
1383 if ((flags & Symbol::ABSOLUTE_REF)
1384 && parameters->options().output_is_position_independent())
1387 // A function call that can branch to a local PLT entry does not need
1388 // a dynamic relocation.
1389 if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset())
1392 // A reference to any PLT entry in a non-position-independent executable
1393 // does not need a dynamic relocation.
1394 // Except due to having function descriptors on powerpc64 we don't define
1395 // functions to their plt code in an executable, so this doesn't apply.
1397 && !parameters->options().output_is_position_independent()
1398 && gsym->has_plt_offset())
1401 // A reference to a symbol defined in a dynamic object or to a
1402 // symbol that is preemptible will need a dynamic relocation.
1403 if (gsym->is_from_dynobj()
1404 || gsym->is_undefined()
1405 || gsym->is_preemptible())
1408 // For all other cases, return FALSE.
1412 // Modified version of symtab.h class Symbol member
1413 // Whether we should use the PLT offset associated with a symbol for
1414 // a relocation. FLAGS is a set of Reference_flags.
1418 use_plt_offset(const Symbol* gsym, int flags)
1420 // If the symbol doesn't have a PLT offset, then naturally we
1421 // don't want to use it.
1422 if (!gsym->has_plt_offset())
1425 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1426 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
1429 // If we are going to generate a dynamic relocation, then we will
1430 // wind up using that, so no need to use the PLT entry.
1431 if (needs_dynamic_reloc<size>(gsym, flags))
1434 // If the symbol is from a dynamic object, we need to use the PLT
1436 if (gsym->is_from_dynobj())
1439 // If we are generating a shared object, and this symbol is
1440 // undefined or preemptible, we need to use the PLT entry.
1441 if (parameters->options().shared()
1442 && (gsym->is_undefined() || gsym->is_preemptible()))
1445 // If this is a call to a weak undefined symbol, we need to use
1446 // the PLT entry; the symbol may be defined by a library loaded
1448 if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined())
1451 // Otherwise we can use the regular definition.
1455 template<int size, bool big_endian>
1456 class Powerpc_relocate_functions
1473 typedef Powerpc_relocate_functions<size, big_endian> This;
1474 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1476 template<int valsize>
1478 has_overflow_signed(Address value)
1480 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1481 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1482 limit <<= ((valsize - 1) >> 1);
1483 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1484 return value + limit > (limit << 1) - 1;
1487 template<int valsize>
1489 has_overflow_bitfield(Address value)
1491 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1492 limit <<= ((valsize - 1) >> 1);
1493 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1494 return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1;
1497 template<int valsize>
1498 static inline Status
1499 overflowed(Address value, Overflow_check overflow)
1501 if (overflow == CHECK_SIGNED)
1503 if (has_overflow_signed<valsize>(value))
1504 return STATUS_OVERFLOW;
1506 else if (overflow == CHECK_BITFIELD)
1508 if (has_overflow_bitfield<valsize>(value))
1509 return STATUS_OVERFLOW;
1514 // Do a simple RELA relocation
1515 template<int valsize>
1516 static inline Status
1517 rela(unsigned char* view, Address value, Overflow_check overflow)
1519 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1520 Valtype* wv = reinterpret_cast<Valtype*>(view);
1521 elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
1522 return overflowed<valsize>(value, overflow);
1525 template<int valsize>
1526 static inline Status
1527 rela(unsigned char* view,
1528 unsigned int right_shift,
1529 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1531 Overflow_check overflow)
1533 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1534 Valtype* wv = reinterpret_cast<Valtype*>(view);
1535 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
1536 Valtype reloc = value >> right_shift;
1539 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
1540 return overflowed<valsize>(value >> right_shift, overflow);
1543 // Do a simple RELA relocation, unaligned.
1544 template<int valsize>
1545 static inline Status
1546 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1548 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
1549 return overflowed<valsize>(value, overflow);
1552 template<int valsize>
1553 static inline Status
1554 rela_ua(unsigned char* view,
1555 unsigned int right_shift,
1556 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1558 Overflow_check overflow)
1560 typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
1562 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view);
1563 Valtype reloc = value >> right_shift;
1566 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc);
1567 return overflowed<valsize>(value >> right_shift, overflow);
1571 // R_PPC64_ADDR64: (Symbol + Addend)
1573 addr64(unsigned char* view, Address value)
1574 { This::template rela<64>(view, value, CHECK_NONE); }
1576 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1578 addr64_u(unsigned char* view, Address value)
1579 { This::template rela_ua<64>(view, value, CHECK_NONE); }
1581 // R_POWERPC_ADDR32: (Symbol + Addend)
1582 static inline Status
1583 addr32(unsigned char* view, Address value, Overflow_check overflow)
1584 { return This::template rela<32>(view, value, overflow); }
1586 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1587 static inline Status
1588 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1589 { return This::template rela_ua<32>(view, value, overflow); }
1591 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1592 static inline Status
1593 addr24(unsigned char* view, Address value, Overflow_check overflow)
1595 Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow);
1596 if (overflow != CHECK_NONE && (value & 3) != 0)
1597 stat = STATUS_OVERFLOW;
1601 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1602 static inline Status
1603 addr16(unsigned char* view, Address value, Overflow_check overflow)
1604 { return This::template rela<16>(view, value, overflow); }
1606 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1607 static inline Status
1608 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1609 { return This::template rela_ua<16>(view, value, overflow); }
1611 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1612 static inline Status
1613 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1615 Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow);
1616 if (overflow != CHECK_NONE && (value & 3) != 0)
1617 stat = STATUS_OVERFLOW;
1621 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1623 addr16_hi(unsigned char* view, Address value)
1624 { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); }
1626 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1628 addr16_ha(unsigned char* view, Address value)
1629 { This::addr16_hi(view, value + 0x8000); }
1631 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1633 addr16_hi2(unsigned char* view, Address value)
1634 { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); }
1636 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1638 addr16_ha2(unsigned char* view, Address value)
1639 { This::addr16_hi2(view, value + 0x8000); }
1641 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1643 addr16_hi3(unsigned char* view, Address value)
1644 { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); }
1646 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1648 addr16_ha3(unsigned char* view, Address value)
1649 { This::addr16_hi3(view, value + 0x8000); }
1651 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1652 static inline Status
1653 addr14(unsigned char* view, Address value, Overflow_check overflow)
1655 Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow);
1656 if (overflow != CHECK_NONE && (value & 3) != 0)
1657 stat = STATUS_OVERFLOW;
1662 // Stash away the index of .got2 or .opd in a relocatable object, if
1663 // such a section exists.
1665 template<int size, bool big_endian>
1667 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1668 Read_symbols_data* sd)
1670 const unsigned char* const pshdrs = sd->section_headers->data();
1671 const unsigned char* namesu = sd->section_names->data();
1672 const char* names = reinterpret_cast<const char*>(namesu);
1673 section_size_type names_size = sd->section_names_size;
1674 const unsigned char* s;
1676 s = this->template find_shdr<size, big_endian>(pshdrs,
1677 size == 32 ? ".got2" : ".opd",
1678 names, names_size, NULL);
1681 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1682 this->special_ = ndx;
1684 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1687 // Examine .rela.opd to build info about function entry points.
1689 template<int size, bool big_endian>
1691 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1693 const unsigned char* prelocs,
1694 const unsigned char* plocal_syms)
1698 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1700 const int reloc_size
1701 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1702 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1703 Address expected_off = 0;
1704 bool regular = true;
1705 unsigned int opd_ent_size = 0;
1707 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1709 Reltype reloc(prelocs);
1710 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1711 = reloc.get_r_info();
1712 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1713 if (r_type == elfcpp::R_PPC64_ADDR64)
1715 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1716 typename elfcpp::Elf_types<size>::Elf_Addr value;
1719 if (r_sym < this->local_symbol_count())
1721 typename elfcpp::Sym<size, big_endian>
1722 lsym(plocal_syms + r_sym * sym_size);
1723 shndx = lsym.get_st_shndx();
1724 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1725 value = lsym.get_st_value();
1728 shndx = this->symbol_section_and_value(r_sym, &value,
1730 this->set_opd_ent(reloc.get_r_offset(), shndx,
1731 value + reloc.get_r_addend());
1734 expected_off = reloc.get_r_offset();
1735 opd_ent_size = expected_off;
1737 else if (expected_off != reloc.get_r_offset())
1739 expected_off += opd_ent_size;
1741 else if (r_type == elfcpp::R_PPC64_TOC)
1743 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1748 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1749 this->name().c_str(), r_type);
1753 if (reloc_count <= 2)
1754 opd_ent_size = this->section_size(this->opd_shndx());
1755 if (opd_ent_size != 24 && opd_ent_size != 16)
1759 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1760 this->name().c_str());
1766 template<int size, bool big_endian>
1768 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1770 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1773 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1774 p != rd->relocs.end();
1777 if (p->data_shndx == this->opd_shndx())
1779 uint64_t opd_size = this->section_size(this->opd_shndx());
1780 gold_assert(opd_size == static_cast<size_t>(opd_size));
1783 this->init_opd(opd_size);
1784 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1785 rd->local_symbols->data());
1793 // Call Sized_dynobj::do_read_symbols to read the symbols then
1794 // read .opd from a dynamic object, filling in opd_ent_ vector,
1796 template<int size, bool big_endian>
1798 Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
1800 Sized_dynobj<size, big_endian>::do_read_symbols(sd);
1803 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
1804 const unsigned char* const pshdrs = sd->section_headers->data();
1805 const unsigned char* namesu = sd->section_names->data();
1806 const char* names = reinterpret_cast<const char*>(namesu);
1807 const unsigned char* s = NULL;
1808 const unsigned char* opd;
1809 section_size_type opd_size;
1811 // Find and read .opd section.
1814 s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names,
1815 sd->section_names_size,
1820 typename elfcpp::Shdr<size, big_endian> shdr(s);
1821 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
1822 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
1824 this->opd_shndx_ = (s - pshdrs) / shdr_size;
1825 this->opd_address_ = shdr.get_sh_addr();
1826 opd_size = convert_to_section_size_type(shdr.get_sh_size());
1827 opd = this->get_view(shdr.get_sh_offset(), opd_size,
1833 // Build set of executable sections.
1834 // Using a set is probably overkill. There is likely to be only
1835 // a few executable sections, typically .init, .text and .fini,
1836 // and they are generally grouped together.
1837 typedef std::set<Sec_info> Exec_sections;
1838 Exec_sections exec_sections;
1840 for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size)
1842 typename elfcpp::Shdr<size, big_endian> shdr(s);
1843 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
1844 && ((shdr.get_sh_flags()
1845 & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
1846 == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
1847 && shdr.get_sh_size() != 0)
1849 exec_sections.insert(Sec_info(shdr.get_sh_addr(),
1850 shdr.get_sh_size(), i));
1853 if (exec_sections.empty())
1856 // Look over the OPD entries. This is complicated by the fact
1857 // that some binaries will use two-word entries while others
1858 // will use the standard three-word entries. In most cases
1859 // the third word (the environment pointer for languages like
1860 // Pascal) is unused and will be zero. If the third word is
1861 // used it should not be pointing into executable sections,
1863 this->init_opd(opd_size);
1864 for (const unsigned char* p = opd; p < opd + opd_size; p += 8)
1866 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype;
1867 const Valtype* valp = reinterpret_cast<const Valtype*>(p);
1868 Valtype val = elfcpp::Swap<64, big_endian>::readval(valp);
1870 // Chances are that this is the third word of an OPD entry.
1872 typename Exec_sections::const_iterator e
1873 = exec_sections.upper_bound(Sec_info(val, 0, 0));
1874 if (e != exec_sections.begin())
1877 if (e->start <= val && val < e->start + e->len)
1879 // We have an address in an executable section.
1880 // VAL ought to be the function entry, set it up.
1881 this->set_opd_ent(p - opd, e->shndx, val);
1882 // Skip second word of OPD entry, the TOC pointer.
1886 // If we didn't match any executable sections, we likely
1887 // have a non-zero third word in the OPD entry.
1892 // Set up some symbols.
1894 template<int size, bool big_endian>
1896 Target_powerpc<size, big_endian>::do_define_standard_symbols(
1897 Symbol_table* symtab,
1902 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1903 // undefined when scanning relocs (and thus requires
1904 // non-relative dynamic relocs). The proper value will be
1906 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1907 if (gotsym != NULL && gotsym->is_undefined())
1909 Target_powerpc<size, big_endian>* target =
1910 static_cast<Target_powerpc<size, big_endian>*>(
1911 parameters->sized_target<size, big_endian>());
1912 Output_data_got_powerpc<size, big_endian>* got
1913 = target->got_section(symtab, layout);
1914 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1915 Symbol_table::PREDEFINED,
1919 elfcpp::STV_HIDDEN, 0,
1923 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1924 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
1925 if (sdasym != NULL && sdasym->is_undefined())
1927 Output_data_space* sdata = new Output_data_space(4, "** sdata");
1929 = layout->add_output_section_data(".sdata", 0,
1931 | elfcpp::SHF_WRITE,
1932 sdata, ORDER_SMALL_DATA, false);
1933 symtab->define_in_output_data("_SDA_BASE_", NULL,
1934 Symbol_table::PREDEFINED,
1935 os, 32768, 0, elfcpp::STT_OBJECT,
1936 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
1942 // Set up PowerPC target specific relobj.
1944 template<int size, bool big_endian>
1946 Target_powerpc<size, big_endian>::do_make_elf_object(
1947 const std::string& name,
1948 Input_file* input_file,
1949 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
1951 int et = ehdr.get_e_type();
1952 // ET_EXEC files are valid input for --just-symbols/-R,
1953 // and we treat them as relocatable objects.
1954 if (et == elfcpp::ET_REL
1955 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
1957 Powerpc_relobj<size, big_endian>* obj =
1958 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
1962 else if (et == elfcpp::ET_DYN)
1964 Powerpc_dynobj<size, big_endian>* obj =
1965 new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr);
1971 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
1976 template<int size, bool big_endian>
1977 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
1980 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
1981 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
1983 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
1984 : Output_data_got<size, big_endian>(),
1985 symtab_(symtab), layout_(layout),
1986 header_ent_cnt_(size == 32 ? 3 : 1),
1987 header_index_(size == 32 ? 0x2000 : 0)
1992 // Create a new GOT entry and return its offset.
1994 add_got_entry(Got_entry got_entry)
1996 this->reserve_ent();
1997 return Output_data_got<size, big_endian>::add_got_entry(got_entry);
2000 // Create a pair of new GOT entries and return the offset of the first.
2002 add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2)
2004 this->reserve_ent(2);
2005 return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1,
2010 add_constant_pair(Valtype c1, Valtype c2)
2012 this->reserve_ent(2);
2013 unsigned int got_offset = this->add_constant(c1);
2014 this->add_constant(c2);
2018 // Offset of _GLOBAL_OFFSET_TABLE_.
2022 return this->got_offset(this->header_index_);
2025 // Offset of base used to access the GOT/TOC.
2026 // The got/toc pointer reg will be set to this value.
2028 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
2031 return this->g_o_t();
2033 return (this->output_section()->address()
2034 + object->toc_base_offset()
2038 // Ensure our GOT has a header.
2040 set_final_data_size()
2042 if (this->header_ent_cnt_ != 0)
2043 this->make_header();
2044 Output_data_got<size, big_endian>::set_final_data_size();
2047 // First word of GOT header needs some values that are not
2048 // handled by Output_data_got so poke them in here.
2049 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2051 do_write(Output_file* of)
2054 if (size == 32 && this->layout_->dynamic_data() != NULL)
2055 val = this->layout_->dynamic_section()->address();
2057 val = this->output_section()->address() + 0x8000;
2058 this->replace_constant(this->header_index_, val);
2059 Output_data_got<size, big_endian>::do_write(of);
2064 reserve_ent(unsigned int cnt = 1)
2066 if (this->header_ent_cnt_ == 0)
2068 if (this->num_entries() + cnt > this->header_index_)
2069 this->make_header();
2075 this->header_ent_cnt_ = 0;
2076 this->header_index_ = this->num_entries();
2079 Output_data_got<size, big_endian>::add_constant(0);
2080 Output_data_got<size, big_endian>::add_constant(0);
2081 Output_data_got<size, big_endian>::add_constant(0);
2083 // Define _GLOBAL_OFFSET_TABLE_ at the header
2084 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2087 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
2088 sym->set_value(this->g_o_t());
2091 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2092 Symbol_table::PREDEFINED,
2093 this, this->g_o_t(), 0,
2096 elfcpp::STV_HIDDEN, 0,
2100 Output_data_got<size, big_endian>::add_constant(0);
2103 // Stashed pointers.
2104 Symbol_table* symtab_;
2108 unsigned int header_ent_cnt_;
2109 // GOT header index.
2110 unsigned int header_index_;
2113 // Get the GOT section, creating it if necessary.
2115 template<int size, bool big_endian>
2116 Output_data_got_powerpc<size, big_endian>*
2117 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
2120 if (this->got_ == NULL)
2122 gold_assert(symtab != NULL && layout != NULL);
2125 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
2127 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
2128 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2129 this->got_, ORDER_DATA, false);
2135 // Get the dynamic reloc section, creating it if necessary.
2137 template<int size, bool big_endian>
2138 typename Target_powerpc<size, big_endian>::Reloc_section*
2139 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
2141 if (this->rela_dyn_ == NULL)
2143 gold_assert(layout != NULL);
2144 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
2145 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
2146 elfcpp::SHF_ALLOC, this->rela_dyn_,
2147 ORDER_DYNAMIC_RELOCS, false);
2149 return this->rela_dyn_;
2152 // Similarly, but for ifunc symbols get the one for ifunc.
2154 template<int size, bool big_endian>
2155 typename Target_powerpc<size, big_endian>::Reloc_section*
2156 Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
2161 return this->rela_dyn_section(layout);
2163 if (this->iplt_ == NULL)
2164 this->make_iplt_section(symtab, layout);
2165 return this->iplt_->rel_plt();
2171 // Determine the stub group size. The group size is the absolute
2172 // value of the parameter --stub-group-size. If --stub-group-size
2173 // is passed a negative value, we restrict stubs to be always before
2174 // the stubbed branches.
2175 Stub_control(int32_t size)
2176 : state_(NO_GROUP), stub_group_size_(abs(size)),
2177 stub14_group_size_(abs(size)),
2178 stubs_always_before_branch_(size < 0), suppress_size_errors_(false),
2179 group_end_addr_(0), owner_(NULL), output_section_(NULL)
2181 if (stub_group_size_ == 1)
2184 if (stubs_always_before_branch_)
2186 stub_group_size_ = 0x1e00000;
2187 stub14_group_size_ = 0x7800;
2191 stub_group_size_ = 0x1c00000;
2192 stub14_group_size_ = 0x7000;
2194 suppress_size_errors_ = true;
2198 // Return true iff input section can be handled by current stub
2201 can_add_to_stub_group(Output_section* o,
2202 const Output_section::Input_section* i,
2205 const Output_section::Input_section*
2211 { return output_section_; }
2217 FINDING_STUB_SECTION,
2222 uint32_t stub_group_size_;
2223 uint32_t stub14_group_size_;
2224 bool stubs_always_before_branch_;
2225 bool suppress_size_errors_;
2226 uint64_t group_end_addr_;
2227 const Output_section::Input_section* owner_;
2228 Output_section* output_section_;
2231 // Return true iff input section can be handled by current stub
2235 Stub_control::can_add_to_stub_group(Output_section* o,
2236 const Output_section::Input_section* i,
2240 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
2241 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
2243 uint64_t start_addr = o->address();
2246 // .init and .fini sections are pasted together to form a single
2247 // function. We can't be adding stubs in the middle of the function.
2248 this_size = o->data_size();
2251 start_addr += i->relobj()->output_section_offset(i->shndx());
2252 this_size = i->data_size();
2254 uint64_t end_addr = start_addr + this_size;
2255 bool toobig = this_size > group_size;
2257 if (toobig && !this->suppress_size_errors_)
2258 gold_warning(_("%s:%s exceeds group size"),
2259 i->relobj()->name().c_str(),
2260 i->relobj()->section_name(i->shndx()).c_str());
2262 if (this->state_ != HAS_STUB_SECTION
2263 && (!whole_sec || this->output_section_ != o)
2264 && (this->state_ == NO_GROUP
2265 || this->group_end_addr_ - end_addr < group_size))
2268 this->output_section_ = o;
2271 if (this->state_ == NO_GROUP)
2273 this->state_ = FINDING_STUB_SECTION;
2274 this->group_end_addr_ = end_addr;
2276 else if (this->group_end_addr_ - start_addr < group_size)
2278 // Adding this section would make the group larger than GROUP_SIZE.
2279 else if (this->state_ == FINDING_STUB_SECTION
2280 && !this->stubs_always_before_branch_
2283 // But wait, there's more! Input sections up to GROUP_SIZE
2284 // bytes before the stub table can be handled by it too.
2285 this->state_ = HAS_STUB_SECTION;
2286 this->group_end_addr_ = end_addr;
2290 this->state_ = NO_GROUP;
2296 // Look over all the input sections, deciding where to place stubs.
2298 template<int size, bool big_endian>
2300 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
2303 Stub_control stub_control(parameters->options().stub_group_size());
2305 // Group input sections and insert stub table
2306 Stub_table<size, big_endian>* stub_table = NULL;
2307 Layout::Section_list section_list;
2308 layout->get_executable_sections(§ion_list);
2309 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
2310 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
2311 o != section_list.rend();
2314 typedef Output_section::Input_section_list Input_section_list;
2315 for (Input_section_list::const_reverse_iterator i
2316 = (*o)->input_sections().rbegin();
2317 i != (*o)->input_sections().rend();
2320 if (i->is_input_section())
2322 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2323 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2324 bool has14 = ppcobj->has_14bit_branch(i->shndx());
2325 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
2327 stub_table->init(stub_control.owner(),
2328 stub_control.output_section());
2331 if (stub_table == NULL)
2332 stub_table = this->new_stub_table();
2333 ppcobj->set_stub_table(i->shndx(), stub_table);
2337 if (stub_table != NULL)
2339 const Output_section::Input_section* i = stub_control.owner();
2340 if (!i->is_input_section())
2342 // Corner case. A new stub group was made for the first
2343 // section (last one looked at here) for some reason, but
2344 // the first section is already being used as the owner for
2345 // a stub table for following sections. Force it into that
2347 gold_assert(this->stub_tables_.size() >= 2);
2348 this->stub_tables_.pop_back();
2350 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2351 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2352 ppcobj->set_stub_table(i->shndx(), this->stub_tables_.back());
2355 stub_table->init(i, stub_control.output_section());
2359 // If this branch needs a plt call stub, or a long branch stub, make one.
2361 template<int size, bool big_endian>
2363 Target_powerpc<size, big_endian>::Branch_info::make_stub(
2364 Stub_table<size, big_endian>* stub_table,
2365 Stub_table<size, big_endian>* ifunc_stub_table,
2366 Symbol_table* symtab) const
2368 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2369 if (sym != NULL && sym->is_forwarder())
2370 sym = symtab->resolve_forwards(sym);
2371 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2373 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_))
2374 : this->object_->local_has_plt_offset(this->r_sym_))
2376 if (stub_table == NULL)
2377 stub_table = this->object_->stub_table(this->shndx_);
2378 if (stub_table == NULL)
2380 // This is a ref from a data section to an ifunc symbol.
2381 stub_table = ifunc_stub_table;
2383 gold_assert(stub_table != NULL);
2385 stub_table->add_plt_call_entry(this->object_, gsym,
2386 this->r_type_, this->addend_);
2388 stub_table->add_plt_call_entry(this->object_, this->r_sym_,
2389 this->r_type_, this->addend_);
2393 unsigned int max_branch_offset;
2394 if (this->r_type_ == elfcpp::R_POWERPC_REL14
2395 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN
2396 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2397 max_branch_offset = 1 << 15;
2398 else if (this->r_type_ == elfcpp::R_POWERPC_REL24
2399 || this->r_type_ == elfcpp::R_PPC_PLTREL24
2400 || this->r_type_ == elfcpp::R_PPC_LOCAL24PC)
2401 max_branch_offset = 1 << 25;
2404 Address from = this->object_->get_output_section_offset(this->shndx_);
2405 gold_assert(from != invalid_address);
2406 from += (this->object_->output_section(this->shndx_)->address()
2411 switch (gsym->source())
2413 case Symbol::FROM_OBJECT:
2415 Object* symobj = gsym->object();
2416 if (symobj->is_dynamic()
2417 || symobj->pluginobj() != NULL)
2420 unsigned int shndx = gsym->shndx(&is_ordinary);
2421 if (shndx == elfcpp::SHN_UNDEF)
2426 case Symbol::IS_UNDEFINED:
2432 Symbol_table::Compute_final_value_status status;
2433 to = symtab->compute_final_value<size>(gsym, &status);
2434 if (status != Symbol_table::CFVS_OK)
2439 const Symbol_value<size>* psymval
2440 = this->object_->local_symbol(this->r_sym_);
2441 Symbol_value<size> symval;
2442 typedef Sized_relobj_file<size, big_endian> ObjType;
2443 typename ObjType::Compute_final_local_value_status status
2444 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2446 if (status != ObjType::CFLV_OK
2447 || !symval.has_output_value())
2449 to = symval.value(this->object_, 0);
2451 to += this->addend_;
2452 if (stub_table == NULL)
2453 stub_table = this->object_->stub_table(this->shndx_);
2454 if (size == 64 && is_branch_reloc(this->r_type_))
2456 unsigned int dest_shndx;
2457 Target_powerpc<size, big_endian>* target =
2458 static_cast<Target_powerpc<size, big_endian>*>(
2459 parameters->sized_target<size, big_endian>());
2460 to = target->symval_for_branch(symtab, to, gsym,
2461 this->object_, &dest_shndx);
2463 Address delta = to - from;
2464 if (delta + max_branch_offset >= 2 * max_branch_offset)
2466 if (stub_table == NULL)
2468 gold_warning(_("%s:%s: branch in non-executable section,"
2469 " no long branch stub for you"),
2470 this->object_->name().c_str(),
2471 this->object_->section_name(this->shndx_).c_str());
2474 stub_table->add_long_branch_entry(this->object_, to);
2479 // Relaxation hook. This is where we do stub generation.
2481 template<int size, bool big_endian>
2483 Target_powerpc<size, big_endian>::do_relax(int pass,
2484 const Input_objects*,
2485 Symbol_table* symtab,
2489 unsigned int prev_brlt_size = 0;
2492 bool thread_safe = parameters->options().plt_thread_safe();
2493 if (size == 64 && !parameters->options().user_set_plt_thread_safe())
2495 static const char* const thread_starter[] =
2499 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2501 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2502 "mq_notify", "create_timer",
2506 "GOMP_parallel_start",
2507 "GOMP_parallel_loop_static_start",
2508 "GOMP_parallel_loop_dynamic_start",
2509 "GOMP_parallel_loop_guided_start",
2510 "GOMP_parallel_loop_runtime_start",
2511 "GOMP_parallel_sections_start",
2514 if (parameters->options().shared())
2518 for (unsigned int i = 0;
2519 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2522 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2523 thread_safe = (sym != NULL
2525 && sym->in_real_elf());
2531 this->plt_thread_safe_ = thread_safe;
2532 this->group_sections(layout, task);
2535 // We need address of stub tables valid for make_stub.
2536 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2537 p != this->stub_tables_.end();
2540 const Powerpc_relobj<size, big_endian>* object
2541 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2542 Address off = object->get_output_section_offset((*p)->shndx());
2543 gold_assert(off != invalid_address);
2544 Output_section* os = (*p)->output_section();
2545 (*p)->set_address_and_size(os, off);
2550 // Clear plt call stubs, long branch stubs and branch lookup table.
2551 prev_brlt_size = this->branch_lookup_table_.size();
2552 this->branch_lookup_table_.clear();
2553 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2554 p != this->stub_tables_.end();
2557 (*p)->clear_stubs();
2561 // Build all the stubs.
2562 Stub_table<size, big_endian>* ifunc_stub_table
2563 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2564 Stub_table<size, big_endian>* one_stub_table
2565 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2566 for (typename Branches::const_iterator b = this->branch_info_.begin();
2567 b != this->branch_info_.end();
2570 b->make_stub(one_stub_table, ifunc_stub_table, symtab);
2573 // Did anything change size?
2574 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2575 bool again = num_huge_branches != prev_brlt_size;
2576 if (size == 64 && num_huge_branches != 0)
2577 this->make_brlt_section(layout);
2578 if (size == 64 && again)
2579 this->brlt_section_->set_current_size(num_huge_branches);
2581 typedef Unordered_set<Output_section*> Output_sections;
2582 Output_sections os_need_update;
2583 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2584 p != this->stub_tables_.end();
2587 if ((*p)->size_update())
2590 (*p)->add_eh_frame(layout);
2591 os_need_update.insert((*p)->output_section());
2595 // Set output section offsets for all input sections in an output
2596 // section that just changed size. Anything past the stubs will
2598 for (typename Output_sections::iterator p = os_need_update.begin();
2599 p != os_need_update.end();
2602 Output_section* os = *p;
2604 typedef Output_section::Input_section_list Input_section_list;
2605 for (Input_section_list::const_iterator i = os->input_sections().begin();
2606 i != os->input_sections().end();
2609 off = align_address(off, i->addralign());
2610 if (i->is_input_section() || i->is_relaxed_input_section())
2611 i->relobj()->set_section_offset(i->shndx(), off);
2612 if (i->is_relaxed_input_section())
2614 Stub_table<size, big_endian>* stub_table
2615 = static_cast<Stub_table<size, big_endian>*>(
2616 i->relaxed_input_section());
2617 off += stub_table->set_address_and_size(os, off);
2620 off += i->data_size();
2622 // If .branch_lt is part of this output section, then we have
2623 // just done the offset adjustment.
2624 os->clear_section_offsets_need_adjustment();
2629 && num_huge_branches != 0
2630 && parameters->options().output_is_position_independent())
2632 // Fill in the BRLT relocs.
2633 this->brlt_section_->reset_brlt_sizes();
2634 for (typename Branch_lookup_table::const_iterator p
2635 = this->branch_lookup_table_.begin();
2636 p != this->branch_lookup_table_.end();
2639 this->brlt_section_->add_reloc(p->first, p->second);
2641 this->brlt_section_->finalize_brlt_sizes();
2646 template<int size, bool big_endian>
2648 Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
2649 unsigned char* oview,
2653 uint64_t address = plt->address();
2654 off_t len = plt->data_size();
2656 if (plt == this->glink_)
2658 // See Output_data_glink::do_write() for glink contents.
2661 // There is one word before __glink_PLTresolve
2665 else if (parameters->options().output_is_position_independent())
2667 // There are two FDEs for a position independent glink.
2668 // The first covers the branch table, the second
2669 // __glink_PLTresolve at the end of glink.
2670 off_t resolve_size = this->glink_->pltresolve_size;
2672 len -= resolve_size;
2675 address += len - resolve_size;
2682 // Must be a stub table.
2683 const Stub_table<size, big_endian>* stub_table
2684 = static_cast<const Stub_table<size, big_endian>*>(plt);
2685 uint64_t stub_address = stub_table->stub_address();
2686 len -= stub_address - address;
2687 address = stub_address;
2690 *paddress = address;
2694 // A class to handle the PLT data.
2696 template<int size, bool big_endian>
2697 class Output_data_plt_powerpc : public Output_section_data_build
2700 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2701 size, big_endian> Reloc_section;
2703 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
2704 Reloc_section* plt_rel,
2705 unsigned int reserved_size,
2707 : Output_section_data_build(size == 32 ? 4 : 8),
2710 initial_plt_entry_size_(reserved_size),
2714 // Add an entry to the PLT.
2719 add_ifunc_entry(Symbol*);
2722 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
2724 // Return the .rela.plt section data.
2731 // Return the number of PLT entries.
2735 if (this->current_data_size() == 0)
2737 return ((this->current_data_size() - this->initial_plt_entry_size_)
2741 // Return the offset of the first non-reserved PLT entry.
2743 first_plt_entry_offset()
2744 { return this->initial_plt_entry_size_; }
2746 // Return the size of a PLT entry.
2748 get_plt_entry_size()
2749 { return plt_entry_size; }
2753 do_adjust_output_section(Output_section* os)
2758 // Write to a map file.
2760 do_print_to_mapfile(Mapfile* mapfile) const
2761 { mapfile->print_output_data(this, this->name_); }
2764 // The size of an entry in the PLT.
2765 static const int plt_entry_size = size == 32 ? 4 : 24;
2767 // Write out the PLT data.
2769 do_write(Output_file*);
2771 // The reloc section.
2772 Reloc_section* rel_;
2773 // Allows access to .glink for do_write.
2774 Target_powerpc<size, big_endian>* targ_;
2775 // The size of the first reserved entry.
2776 int initial_plt_entry_size_;
2777 // What to report in map file.
2781 // Add an entry to the PLT.
2783 template<int size, bool big_endian>
2785 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
2787 if (!gsym->has_plt_offset())
2789 section_size_type off = this->current_data_size();
2791 off += this->first_plt_entry_offset();
2792 gsym->set_plt_offset(off);
2793 gsym->set_needs_dynsym_entry();
2794 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
2795 this->rel_->add_global(gsym, dynrel, this, off, 0);
2796 off += plt_entry_size;
2797 this->set_current_data_size(off);
2801 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2803 template<int size, bool big_endian>
2805 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
2807 if (!gsym->has_plt_offset())
2809 section_size_type off = this->current_data_size();
2810 gsym->set_plt_offset(off);
2811 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2813 dynrel = elfcpp::R_PPC64_JMP_IREL;
2814 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
2815 off += plt_entry_size;
2816 this->set_current_data_size(off);
2820 // Add an entry for a local ifunc symbol to the IPLT.
2822 template<int size, bool big_endian>
2824 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
2825 Sized_relobj_file<size, big_endian>* relobj,
2826 unsigned int local_sym_index)
2828 if (!relobj->local_has_plt_offset(local_sym_index))
2830 section_size_type off = this->current_data_size();
2831 relobj->set_local_plt_offset(local_sym_index, off);
2832 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2834 dynrel = elfcpp::R_PPC64_JMP_IREL;
2835 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
2837 off += plt_entry_size;
2838 this->set_current_data_size(off);
2842 static const uint32_t add_0_11_11 = 0x7c0b5a14;
2843 static const uint32_t add_2_2_11 = 0x7c425a14;
2844 static const uint32_t add_3_3_2 = 0x7c631214;
2845 static const uint32_t add_3_3_13 = 0x7c636a14;
2846 static const uint32_t add_11_0_11 = 0x7d605a14;
2847 static const uint32_t add_12_2_11 = 0x7d825a14;
2848 static const uint32_t add_12_12_11 = 0x7d8c5a14;
2849 static const uint32_t addi_11_11 = 0x396b0000;
2850 static const uint32_t addi_12_12 = 0x398c0000;
2851 static const uint32_t addi_2_2 = 0x38420000;
2852 static const uint32_t addi_3_2 = 0x38620000;
2853 static const uint32_t addi_3_3 = 0x38630000;
2854 static const uint32_t addis_0_2 = 0x3c020000;
2855 static const uint32_t addis_0_13 = 0x3c0d0000;
2856 static const uint32_t addis_11_11 = 0x3d6b0000;
2857 static const uint32_t addis_11_30 = 0x3d7e0000;
2858 static const uint32_t addis_12_12 = 0x3d8c0000;
2859 static const uint32_t addis_12_2 = 0x3d820000;
2860 static const uint32_t addis_3_2 = 0x3c620000;
2861 static const uint32_t addis_3_13 = 0x3c6d0000;
2862 static const uint32_t b = 0x48000000;
2863 static const uint32_t bcl_20_31 = 0x429f0005;
2864 static const uint32_t bctr = 0x4e800420;
2865 static const uint32_t blr = 0x4e800020;
2866 static const uint32_t blrl = 0x4e800021;
2867 static const uint32_t bnectr_p4 = 0x4ce20420;
2868 static const uint32_t cmpldi_2_0 = 0x28220000;
2869 static const uint32_t cror_15_15_15 = 0x4def7b82;
2870 static const uint32_t cror_31_31_31 = 0x4ffffb82;
2871 static const uint32_t ld_0_1 = 0xe8010000;
2872 static const uint32_t ld_0_12 = 0xe80c0000;
2873 static const uint32_t ld_11_12 = 0xe96c0000;
2874 static const uint32_t ld_11_2 = 0xe9620000;
2875 static const uint32_t ld_2_1 = 0xe8410000;
2876 static const uint32_t ld_2_11 = 0xe84b0000;
2877 static const uint32_t ld_2_12 = 0xe84c0000;
2878 static const uint32_t ld_2_2 = 0xe8420000;
2879 static const uint32_t lfd_0_1 = 0xc8010000;
2880 static const uint32_t li_0_0 = 0x38000000;
2881 static const uint32_t li_12_0 = 0x39800000;
2882 static const uint32_t lis_0_0 = 0x3c000000;
2883 static const uint32_t lis_11 = 0x3d600000;
2884 static const uint32_t lis_12 = 0x3d800000;
2885 static const uint32_t lwz_0_12 = 0x800c0000;
2886 static const uint32_t lwz_11_11 = 0x816b0000;
2887 static const uint32_t lwz_11_30 = 0x817e0000;
2888 static const uint32_t lwz_12_12 = 0x818c0000;
2889 static const uint32_t lwzu_0_12 = 0x840c0000;
2890 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
2891 static const uint32_t mflr_0 = 0x7c0802a6;
2892 static const uint32_t mflr_11 = 0x7d6802a6;
2893 static const uint32_t mflr_12 = 0x7d8802a6;
2894 static const uint32_t mtctr_0 = 0x7c0903a6;
2895 static const uint32_t mtctr_11 = 0x7d6903a6;
2896 static const uint32_t mtctr_12 = 0x7d8903a6;
2897 static const uint32_t mtlr_0 = 0x7c0803a6;
2898 static const uint32_t mtlr_12 = 0x7d8803a6;
2899 static const uint32_t nop = 0x60000000;
2900 static const uint32_t ori_0_0_0 = 0x60000000;
2901 static const uint32_t std_0_1 = 0xf8010000;
2902 static const uint32_t std_0_12 = 0xf80c0000;
2903 static const uint32_t std_2_1 = 0xf8410000;
2904 static const uint32_t stfd_0_1 = 0xd8010000;
2905 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
2906 static const uint32_t sub_11_11_12 = 0x7d6c5850;
2907 static const uint32_t xor_11_11_11 = 0x7d6b5a78;
2909 // Write out the PLT.
2911 template<int size, bool big_endian>
2913 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
2915 if (size == 32 && this->name_[3] != 'I')
2917 const section_size_type offset = this->offset();
2918 const section_size_type oview_size
2919 = convert_to_section_size_type(this->data_size());
2920 unsigned char* const oview = of->get_output_view(offset, oview_size);
2921 unsigned char* pov = oview;
2922 unsigned char* endpov = oview + oview_size;
2924 // The address of the .glink branch table
2925 const Output_data_glink<size, big_endian>* glink
2926 = this->targ_->glink_section();
2927 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
2929 while (pov < endpov)
2931 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
2936 of->write_output_view(offset, oview_size, oview);
2940 // Create the PLT section.
2942 template<int size, bool big_endian>
2944 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
2947 if (this->plt_ == NULL)
2949 if (this->got_ == NULL)
2950 this->got_section(symtab, layout);
2952 if (this->glink_ == NULL)
2953 make_glink_section(layout);
2955 // Ensure that .rela.dyn always appears before .rela.plt This is
2956 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2957 // needs to include .rela.plt in its range.
2958 this->rela_dyn_section(layout);
2960 Reloc_section* plt_rel = new Reloc_section(false);
2961 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
2962 elfcpp::SHF_ALLOC, plt_rel,
2963 ORDER_DYNAMIC_PLT_RELOCS, false);
2965 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
2966 size == 32 ? 0 : 24,
2968 layout->add_output_section_data(".plt",
2970 ? elfcpp::SHT_PROGBITS
2971 : elfcpp::SHT_NOBITS),
2972 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2981 // Create the IPLT section.
2983 template<int size, bool big_endian>
2985 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
2988 if (this->iplt_ == NULL)
2990 this->make_plt_section(symtab, layout);
2992 Reloc_section* iplt_rel = new Reloc_section(false);
2993 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
2995 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
2997 this->plt_->output_section()->add_output_section_data(this->iplt_);
3001 // A section for huge long branch addresses, similar to plt section.
3003 template<int size, bool big_endian>
3004 class Output_data_brlt_powerpc : public Output_section_data_build
3007 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3008 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3009 size, big_endian> Reloc_section;
3011 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
3012 Reloc_section* brlt_rel)
3013 : Output_section_data_build(size == 32 ? 4 : 8),
3021 this->reset_data_size();
3022 this->rel_->reset_data_size();
3026 finalize_brlt_sizes()
3028 this->finalize_data_size();
3029 this->rel_->finalize_data_size();
3032 // Add a reloc for an entry in the BRLT.
3034 add_reloc(Address to, unsigned int off)
3035 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
3037 // Update section and reloc section size.
3039 set_current_size(unsigned int num_branches)
3041 this->reset_address_and_file_offset();
3042 this->set_current_data_size(num_branches * 16);
3043 this->finalize_data_size();
3044 Output_section* os = this->output_section();
3045 os->set_section_offsets_need_adjustment();
3046 if (this->rel_ != NULL)
3048 unsigned int reloc_size
3049 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
3050 this->rel_->reset_address_and_file_offset();
3051 this->rel_->set_current_data_size(num_branches * reloc_size);
3052 this->rel_->finalize_data_size();
3053 Output_section* os = this->rel_->output_section();
3054 os->set_section_offsets_need_adjustment();
3060 do_adjust_output_section(Output_section* os)
3065 // Write to a map file.
3067 do_print_to_mapfile(Mapfile* mapfile) const
3068 { mapfile->print_output_data(this, "** BRLT"); }
3071 // Write out the BRLT data.
3073 do_write(Output_file*);
3075 // The reloc section.
3076 Reloc_section* rel_;
3077 Target_powerpc<size, big_endian>* targ_;
3080 // Make the branch lookup table section.
3082 template<int size, bool big_endian>
3084 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
3086 if (size == 64 && this->brlt_section_ == NULL)
3088 Reloc_section* brlt_rel = NULL;
3089 bool is_pic = parameters->options().output_is_position_independent();
3092 // When PIC we can't fill in .branch_lt (like .plt it can be
3093 // a bss style section) but must initialise at runtime via
3094 // dynamic relocats.
3095 this->rela_dyn_section(layout);
3096 brlt_rel = new Reloc_section(false);
3097 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
3100 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
3101 if (this->plt_ && is_pic)
3102 this->plt_->output_section()
3103 ->add_output_section_data(this->brlt_section_);
3105 layout->add_output_section_data(".branch_lt",
3106 (is_pic ? elfcpp::SHT_NOBITS
3107 : elfcpp::SHT_PROGBITS),
3108 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3109 this->brlt_section_,
3110 (is_pic ? ORDER_SMALL_BSS
3111 : ORDER_SMALL_DATA),
3116 // Write out .branch_lt when non-PIC.
3118 template<int size, bool big_endian>
3120 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
3122 if (size == 64 && !parameters->options().output_is_position_independent())
3124 const section_size_type offset = this->offset();
3125 const section_size_type oview_size
3126 = convert_to_section_size_type(this->data_size());
3127 unsigned char* const oview = of->get_output_view(offset, oview_size);
3129 this->targ_->write_branch_lookup_table(oview);
3130 of->write_output_view(offset, oview_size, oview);
3134 static inline uint32_t
3140 static inline uint32_t
3146 static inline uint32_t
3149 return hi(a + 0x8000);
3155 static const unsigned char eh_frame_cie[12];
3159 const unsigned char Eh_cie<size>::eh_frame_cie[] =
3162 'z', 'R', 0, // Augmentation string.
3163 4, // Code alignment.
3164 0x80 - size / 8 , // Data alignment.
3166 1, // Augmentation size.
3167 (elfcpp::DW_EH_PE_pcrel
3168 | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
3169 elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
3172 // Describe __glink_PLTresolve use of LR, 64-bit version.
3173 static const unsigned char glink_eh_frame_fde_64[] =
3175 0, 0, 0, 0, // Replaced with offset to .glink.
3176 0, 0, 0, 0, // Replaced with size of .glink.
3177 0, // Augmentation size.
3178 elfcpp::DW_CFA_advance_loc + 1,
3179 elfcpp::DW_CFA_register, 65, 12,
3180 elfcpp::DW_CFA_advance_loc + 4,
3181 elfcpp::DW_CFA_restore_extended, 65
3184 // Describe __glink_PLTresolve use of LR, 32-bit version.
3185 static const unsigned char glink_eh_frame_fde_32[] =
3187 0, 0, 0, 0, // Replaced with offset to .glink.
3188 0, 0, 0, 0, // Replaced with size of .glink.
3189 0, // Augmentation size.
3190 elfcpp::DW_CFA_advance_loc + 2,
3191 elfcpp::DW_CFA_register, 65, 0,
3192 elfcpp::DW_CFA_advance_loc + 4,
3193 elfcpp::DW_CFA_restore_extended, 65
3196 static const unsigned char default_fde[] =
3198 0, 0, 0, 0, // Replaced with offset to stubs.
3199 0, 0, 0, 0, // Replaced with size of stubs.
3200 0, // Augmentation size.
3201 elfcpp::DW_CFA_nop, // Pad.
3206 template<bool big_endian>
3208 write_insn(unsigned char* p, uint32_t v)
3210 elfcpp::Swap<32, big_endian>::writeval(p, v);
3213 // Stub_table holds information about plt and long branch stubs.
3214 // Stubs are built in an area following some input section determined
3215 // by group_sections(). This input section is converted to a relaxed
3216 // input section allowing it to be resized to accommodate the stubs
3218 template<int size, bool big_endian>
3219 class Stub_table : public Output_relaxed_input_section
3222 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3223 static const Address invalid_address = static_cast<Address>(0) - 1;
3225 Stub_table(Target_powerpc<size, big_endian>* targ)
3226 : Output_relaxed_input_section(NULL, 0, 0),
3227 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
3228 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
3229 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3232 // Delayed Output_relaxed_input_section init.
3234 init(const Output_section::Input_section*, Output_section*);
3236 // Add a plt call stub.
3238 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3244 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3249 // Find a given plt call stub.
3251 find_plt_call_entry(const Symbol*) const;
3254 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3255 unsigned int) const;
3258 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3264 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
3269 // Add a long branch stub.
3271 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
3274 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
3280 this->plt_call_stubs_.clear();
3281 this->plt_size_ = 0;
3282 this->long_branch_stubs_.clear();
3283 this->branch_size_ = 0;
3287 set_address_and_size(const Output_section* os, Address off)
3289 Address start_off = off;
3290 off += this->orig_data_size_;
3291 Address my_size = this->plt_size_ + this->branch_size_;
3293 off = align_address(off, this->stub_align());
3294 // Include original section size and alignment padding in size
3295 my_size += off - start_off;
3296 this->reset_address_and_file_offset();
3297 this->set_current_data_size(my_size);
3298 this->set_address_and_file_offset(os->address() + start_off,
3299 os->offset() + start_off);
3304 stub_address() const
3306 return align_address(this->address() + this->orig_data_size_,
3307 this->stub_align());
3313 return align_address(this->offset() + this->orig_data_size_,
3314 this->stub_align());
3319 { return this->plt_size_; }
3324 Output_section* os = this->output_section();
3325 if (os->addralign() < this->stub_align())
3327 os->set_addralign(this->stub_align());
3328 // FIXME: get rid of the insane checkpointing.
3329 // We can't increase alignment of the input section to which
3330 // stubs are attached; The input section may be .init which
3331 // is pasted together with other .init sections to form a
3332 // function. Aligning might insert zero padding resulting in
3333 // sigill. However we do need to increase alignment of the
3334 // output section so that the align_address() on offset in
3335 // set_address_and_size() adds the same padding as the
3336 // align_address() on address in stub_address().
3337 // What's more, we need this alignment for the layout done in
3338 // relaxation_loop_body() so that the output section starts at
3339 // a suitably aligned address.
3340 os->checkpoint_set_addralign(this->stub_align());
3342 if (this->last_plt_size_ != this->plt_size_
3343 || this->last_branch_size_ != this->branch_size_)
3345 this->last_plt_size_ = this->plt_size_;
3346 this->last_branch_size_ = this->branch_size_;
3352 // Add .eh_frame info for this stub section. Unlike other linker
3353 // generated .eh_frame this is added late in the link, because we
3354 // only want the .eh_frame info if this particular stub section is
3357 add_eh_frame(Layout* layout)
3359 if (!this->eh_frame_added_)
3361 if (!parameters->options().ld_generated_unwind_info())
3364 // Since we add stub .eh_frame info late, it must be placed
3365 // after all other linker generated .eh_frame info so that
3366 // merge mapping need not be updated for input sections.
3367 // There is no provision to use a different CIE to that used
3369 if (!this->targ_->has_glink())
3372 layout->add_eh_frame_for_plt(this,
3373 Eh_cie<size>::eh_frame_cie,
3374 sizeof (Eh_cie<size>::eh_frame_cie),
3376 sizeof (default_fde));
3377 this->eh_frame_added_ = true;
3381 Target_powerpc<size, big_endian>*
3387 class Plt_stub_ent_hash;
3388 typedef Unordered_map<Plt_stub_ent, unsigned int,
3389 Plt_stub_ent_hash> Plt_stub_entries;
3391 // Alignment of stub section.
3397 unsigned int min_align = 32;
3398 unsigned int user_align = 1 << parameters->options().plt_align();
3399 return std::max(user_align, min_align);
3402 // Return the plt offset for the given call stub.
3404 plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const
3406 const Symbol* gsym = p->first.sym_;
3409 *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC
3410 && gsym->can_use_relative_reloc(false));
3411 return gsym->plt_offset();
3416 const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
3417 unsigned int local_sym_index = p->first.locsym_;
3418 return relobj->local_plt_offset(local_sym_index);
3422 // Size of a given plt call stub.
3424 plt_call_size(typename Plt_stub_entries::const_iterator p) const
3430 Address plt_addr = this->plt_off(p, &is_iplt);
3432 plt_addr += this->targ_->iplt_section()->address();
3434 plt_addr += this->targ_->plt_section()->address();
3435 Address got_addr = this->targ_->got_section()->output_section()->address();
3436 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3437 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
3438 got_addr += ppcobj->toc_base_offset();
3439 Address off = plt_addr - got_addr;
3440 bool static_chain = parameters->options().plt_static_chain();
3441 bool thread_safe = this->targ_->plt_thread_safe();
3442 unsigned int bytes = (4 * 5
3445 + 4 * (ha(off) != 0)
3446 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
3447 unsigned int align = 1 << parameters->options().plt_align();
3449 bytes = (bytes + align - 1) & -align;
3453 // Return long branch stub size.
3455 branch_stub_size(Address to)
3458 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
3459 if (to - loc + (1 << 25) < 2 << 25)
3461 if (size == 64 || !parameters->options().output_is_position_independent())
3468 do_write(Output_file*);
3470 // Plt call stub keys.
3474 Plt_stub_ent(const Symbol* sym)
3475 : sym_(sym), object_(0), addend_(0), locsym_(0)
3478 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3479 unsigned int locsym_index)
3480 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3483 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3485 unsigned int r_type,
3487 : sym_(sym), object_(0), addend_(0), locsym_(0)
3490 this->addend_ = addend;
3491 else if (parameters->options().output_is_position_independent()
3492 && r_type == elfcpp::R_PPC_PLTREL24)
3494 this->addend_ = addend;
3495 if (this->addend_ >= 32768)
3496 this->object_ = object;
3500 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3501 unsigned int locsym_index,
3502 unsigned int r_type,
3504 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3507 this->addend_ = addend;
3508 else if (parameters->options().output_is_position_independent()
3509 && r_type == elfcpp::R_PPC_PLTREL24)
3510 this->addend_ = addend;
3513 bool operator==(const Plt_stub_ent& that) const
3515 return (this->sym_ == that.sym_
3516 && this->object_ == that.object_
3517 && this->addend_ == that.addend_
3518 && this->locsym_ == that.locsym_);
3522 const Sized_relobj_file<size, big_endian>* object_;
3523 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
3524 unsigned int locsym_;
3527 class Plt_stub_ent_hash
3530 size_t operator()(const Plt_stub_ent& ent) const
3532 return (reinterpret_cast<uintptr_t>(ent.sym_)
3533 ^ reinterpret_cast<uintptr_t>(ent.object_)
3539 // Long branch stub keys.
3540 class Branch_stub_ent
3543 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to)
3544 : dest_(to), toc_base_off_(0)
3547 toc_base_off_ = obj->toc_base_offset();
3550 bool operator==(const Branch_stub_ent& that) const
3552 return (this->dest_ == that.dest_
3554 || this->toc_base_off_ == that.toc_base_off_));
3558 unsigned int toc_base_off_;
3561 class Branch_stub_ent_hash
3564 size_t operator()(const Branch_stub_ent& ent) const
3565 { return ent.dest_ ^ ent.toc_base_off_; }
3568 // In a sane world this would be a global.
3569 Target_powerpc<size, big_endian>* targ_;
3570 // Map sym/object/addend to stub offset.
3571 Plt_stub_entries plt_call_stubs_;
3572 // Map destination address to stub offset.
3573 typedef Unordered_map<Branch_stub_ent, unsigned int,
3574 Branch_stub_ent_hash> Branch_stub_entries;
3575 Branch_stub_entries long_branch_stubs_;
3576 // size of input section
3577 section_size_type orig_data_size_;
3579 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
3580 // Whether .eh_frame info has been created for this stub section.
3581 bool eh_frame_added_;
3584 // Make a new stub table, and record.
3586 template<int size, bool big_endian>
3587 Stub_table<size, big_endian>*
3588 Target_powerpc<size, big_endian>::new_stub_table()
3590 Stub_table<size, big_endian>* stub_table
3591 = new Stub_table<size, big_endian>(this);
3592 this->stub_tables_.push_back(stub_table);
3596 // Delayed stub table initialisation, because we create the stub table
3597 // before we know to which section it will be attached.
3599 template<int size, bool big_endian>
3601 Stub_table<size, big_endian>::init(
3602 const Output_section::Input_section* owner,
3603 Output_section* output_section)
3605 this->set_relobj(owner->relobj());
3606 this->set_shndx(owner->shndx());
3607 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3608 this->set_output_section(output_section);
3609 this->orig_data_size_ = owner->current_data_size();
3611 std::vector<Output_relaxed_input_section*> new_relaxed;
3612 new_relaxed.push_back(this);
3613 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3616 // Add a plt call stub, if we do not already have one for this
3617 // sym/object/addend combo.
3619 template<int size, bool big_endian>
3621 Stub_table<size, big_endian>::add_plt_call_entry(
3622 const Sized_relobj_file<size, big_endian>* object,
3624 unsigned int r_type,
3627 Plt_stub_ent ent(object, gsym, r_type, addend);
3628 Address off = this->plt_size_;
3629 std::pair<typename Plt_stub_entries::iterator, bool> p
3630 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3632 this->plt_size_ = off + this->plt_call_size(p.first);
3635 template<int size, bool big_endian>
3637 Stub_table<size, big_endian>::add_plt_call_entry(
3638 const Sized_relobj_file<size, big_endian>* object,
3639 unsigned int locsym_index,
3640 unsigned int r_type,
3643 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3644 Address off = this->plt_size_;
3645 std::pair<typename Plt_stub_entries::iterator, bool> p
3646 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3648 this->plt_size_ = off + this->plt_call_size(p.first);
3651 // Find a plt call stub.
3653 template<int size, bool big_endian>
3654 typename Stub_table<size, big_endian>::Address
3655 Stub_table<size, big_endian>::find_plt_call_entry(
3656 const Sized_relobj_file<size, big_endian>* object,
3658 unsigned int r_type,
3659 Address addend) const
3661 Plt_stub_ent ent(object, gsym, r_type, addend);
3662 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3663 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3666 template<int size, bool big_endian>
3667 typename Stub_table<size, big_endian>::Address
3668 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
3670 Plt_stub_ent ent(gsym);
3671 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3672 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3675 template<int size, bool big_endian>
3676 typename Stub_table<size, big_endian>::Address
3677 Stub_table<size, big_endian>::find_plt_call_entry(
3678 const Sized_relobj_file<size, big_endian>* object,
3679 unsigned int locsym_index,
3680 unsigned int r_type,
3681 Address addend) const
3683 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3684 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3685 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3688 template<int size, bool big_endian>
3689 typename Stub_table<size, big_endian>::Address
3690 Stub_table<size, big_endian>::find_plt_call_entry(
3691 const Sized_relobj_file<size, big_endian>* object,
3692 unsigned int locsym_index) const
3694 Plt_stub_ent ent(object, locsym_index);
3695 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3696 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3699 // Add a long branch stub if we don't already have one to given
3702 template<int size, bool big_endian>
3704 Stub_table<size, big_endian>::add_long_branch_entry(
3705 const Powerpc_relobj<size, big_endian>* object,
3708 Branch_stub_ent ent(object, to);
3709 Address off = this->branch_size_;
3710 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
3712 unsigned int stub_size = this->branch_stub_size(to);
3713 this->branch_size_ = off + stub_size;
3714 if (size == 64 && stub_size != 4)
3715 this->targ_->add_branch_lookup_table(to);
3719 // Find long branch stub.
3721 template<int size, bool big_endian>
3722 typename Stub_table<size, big_endian>::Address
3723 Stub_table<size, big_endian>::find_long_branch_entry(
3724 const Powerpc_relobj<size, big_endian>* object,
3727 Branch_stub_ent ent(object, to);
3728 typename Branch_stub_entries::const_iterator p
3729 = this->long_branch_stubs_.find(ent);
3730 return p == this->long_branch_stubs_.end() ? invalid_address : p->second;
3733 // A class to handle .glink.
3735 template<int size, bool big_endian>
3736 class Output_data_glink : public Output_section_data
3739 static const int pltresolve_size = 16*4;
3741 Output_data_glink(Target_powerpc<size, big_endian>* targ)
3742 : Output_section_data(16), targ_(targ)
3746 add_eh_frame(Layout* layout)
3748 if (!parameters->options().ld_generated_unwind_info())
3752 layout->add_eh_frame_for_plt(this,
3753 Eh_cie<64>::eh_frame_cie,
3754 sizeof (Eh_cie<64>::eh_frame_cie),
3755 glink_eh_frame_fde_64,
3756 sizeof (glink_eh_frame_fde_64));
3759 // 32-bit .glink can use the default since the CIE return
3760 // address reg, LR, is valid.
3761 layout->add_eh_frame_for_plt(this,
3762 Eh_cie<32>::eh_frame_cie,
3763 sizeof (Eh_cie<32>::eh_frame_cie),
3765 sizeof (default_fde));
3766 // Except where LR is used in a PIC __glink_PLTresolve.
3767 if (parameters->options().output_is_position_independent())
3768 layout->add_eh_frame_for_plt(this,
3769 Eh_cie<32>::eh_frame_cie,
3770 sizeof (Eh_cie<32>::eh_frame_cie),
3771 glink_eh_frame_fde_32,
3772 sizeof (glink_eh_frame_fde_32));
3777 // Write to a map file.
3779 do_print_to_mapfile(Mapfile* mapfile) const
3780 { mapfile->print_output_data(this, _("** glink")); }
3784 set_final_data_size();
3788 do_write(Output_file*);
3790 // Allows access to .got and .plt for do_write.
3791 Target_powerpc<size, big_endian>* targ_;
3794 template<int size, bool big_endian>
3796 Output_data_glink<size, big_endian>::set_final_data_size()
3798 unsigned int count = this->targ_->plt_entry_count();
3799 section_size_type total = 0;
3805 // space for branch table
3806 total += 4 * (count - 1);
3808 total += -total & 15;
3809 total += this->pltresolve_size;
3813 total += this->pltresolve_size;
3815 // space for branch table
3818 total += 4 * (count - 0x8000);
3822 this->set_data_size(total);
3825 // Write out plt and long branch stub code.
3827 template<int size, bool big_endian>
3829 Stub_table<size, big_endian>::do_write(Output_file* of)
3831 if (this->plt_call_stubs_.empty()
3832 && this->long_branch_stubs_.empty())
3835 const section_size_type start_off = this->offset();
3836 const section_size_type off = this->stub_offset();
3837 const section_size_type oview_size =
3838 convert_to_section_size_type(this->data_size() - (off - start_off));
3839 unsigned char* const oview = of->get_output_view(off, oview_size);
3844 const Output_data_got_powerpc<size, big_endian>* got
3845 = this->targ_->got_section();
3846 Address got_os_addr = got->output_section()->address();
3848 if (!this->plt_call_stubs_.empty())
3850 // The base address of the .plt section.
3851 Address plt_base = this->targ_->plt_section()->address();
3852 Address iplt_base = invalid_address;
3854 // Write out plt call stubs.
3855 typename Plt_stub_entries::const_iterator cs;
3856 for (cs = this->plt_call_stubs_.begin();
3857 cs != this->plt_call_stubs_.end();
3861 Address pltoff = this->plt_off(cs, &is_iplt);
3862 Address plt_addr = pltoff;
3865 if (iplt_base == invalid_address)
3866 iplt_base = this->targ_->iplt_section()->address();
3867 plt_addr += iplt_base;
3870 plt_addr += plt_base;
3871 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3872 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
3873 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
3874 Address off = plt_addr - got_addr;
3876 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
3877 gold_error(_("%s: linkage table error against `%s'"),
3878 cs->first.object_->name().c_str(),
3879 cs->first.sym_->demangled_name().c_str());
3881 bool static_chain = parameters->options().plt_static_chain();
3882 bool thread_safe = this->targ_->plt_thread_safe();
3883 bool use_fake_dep = false;
3884 Address cmp_branch_off = 0;
3887 unsigned int pltindex
3888 = ((pltoff - this->targ_->first_plt_entry_offset())
3889 / this->targ_->plt_entry_size());
3891 = (this->targ_->glink_section()->pltresolve_size
3893 if (pltindex > 32768)
3894 glinkoff += (pltindex - 32768) * 4;
3896 = this->targ_->glink_section()->address() + glinkoff;
3898 = (this->stub_address() + cs->second + 24
3899 + 4 * (ha(off) != 0)
3900 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
3901 + 4 * static_chain);
3902 cmp_branch_off = to - from;
3903 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
3906 p = oview + cs->second;
3909 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3910 write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4;
3911 write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4;
3912 if (ha(off + 8 + 8 * static_chain) != ha(off))
3914 write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4;
3917 write_insn<big_endian>(p, mtctr_11), p += 4;
3920 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3921 write_insn<big_endian>(p, add_12_12_11), p += 4;
3923 write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4;
3925 write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4;
3929 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3930 write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4;
3931 if (ha(off + 8 + 8 * static_chain) != ha(off))
3933 write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4;
3936 write_insn<big_endian>(p, mtctr_11), p += 4;
3939 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3940 write_insn<big_endian>(p, add_2_2_11), p += 4;
3943 write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4;
3944 write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4;
3946 if (thread_safe && !use_fake_dep)
3948 write_insn<big_endian>(p, cmpldi_2_0), p += 4;
3949 write_insn<big_endian>(p, bnectr_p4), p += 4;
3950 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
3953 write_insn<big_endian>(p, bctr);
3957 // Write out long branch stubs.
3958 typename Branch_stub_entries::const_iterator bs;
3959 for (bs = this->long_branch_stubs_.begin();
3960 bs != this->long_branch_stubs_.end();
3963 p = oview + this->plt_size_ + bs->second;
3964 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3965 Address delta = bs->first.dest_ - loc;
3966 if (delta + (1 << 25) < 2 << 25)
3967 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3971 = this->targ_->find_branch_lookup_table(bs->first.dest_);
3972 gold_assert(brlt_addr != invalid_address);
3973 brlt_addr += this->targ_->brlt_section()->address();
3974 Address got_addr = got_os_addr + bs->first.toc_base_off_;
3975 Address brltoff = brlt_addr - got_addr;
3976 if (ha(brltoff) == 0)
3978 write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4;
3982 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
3983 write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4;
3985 write_insn<big_endian>(p, mtctr_11), p += 4;
3986 write_insn<big_endian>(p, bctr);
3992 if (!this->plt_call_stubs_.empty())
3994 // The base address of the .plt section.
3995 Address plt_base = this->targ_->plt_section()->address();
3996 Address iplt_base = invalid_address;
3997 // The address of _GLOBAL_OFFSET_TABLE_.
3998 Address g_o_t = invalid_address;
4000 // Write out plt call stubs.
4001 typename Plt_stub_entries::const_iterator cs;
4002 for (cs = this->plt_call_stubs_.begin();
4003 cs != this->plt_call_stubs_.end();
4007 Address plt_addr = this->plt_off(cs, &is_iplt);
4010 if (iplt_base == invalid_address)
4011 iplt_base = this->targ_->iplt_section()->address();
4012 plt_addr += iplt_base;
4015 plt_addr += plt_base;
4017 p = oview + cs->second;
4018 if (parameters->options().output_is_position_independent())
4021 const Powerpc_relobj<size, big_endian>* ppcobj
4022 = (static_cast<const Powerpc_relobj<size, big_endian>*>
4023 (cs->first.object_));
4024 if (ppcobj != NULL && cs->first.addend_ >= 32768)
4026 unsigned int got2 = ppcobj->got2_shndx();
4027 got_addr = ppcobj->get_output_section_offset(got2);
4028 gold_assert(got_addr != invalid_address);
4029 got_addr += (ppcobj->output_section(got2)->address()
4030 + cs->first.addend_);
4034 if (g_o_t == invalid_address)
4036 const Output_data_got_powerpc<size, big_endian>* got
4037 = this->targ_->got_section();
4038 g_o_t = got->address() + got->g_o_t();
4043 Address off = plt_addr - got_addr;
4046 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
4047 write_insn<big_endian>(p + 4, mtctr_11);
4048 write_insn<big_endian>(p + 8, bctr);
4052 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
4053 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
4054 write_insn<big_endian>(p + 8, mtctr_11);
4055 write_insn<big_endian>(p + 12, bctr);
4060 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
4061 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
4062 write_insn<big_endian>(p + 8, mtctr_11);
4063 write_insn<big_endian>(p + 12, bctr);
4068 // Write out long branch stubs.
4069 typename Branch_stub_entries::const_iterator bs;
4070 for (bs = this->long_branch_stubs_.begin();
4071 bs != this->long_branch_stubs_.end();
4074 p = oview + this->plt_size_ + bs->second;
4075 Address loc = this->stub_address() + this->plt_size_ + bs->second;
4076 Address delta = bs->first.dest_ - loc;
4077 if (delta + (1 << 25) < 2 << 25)
4078 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
4079 else if (!parameters->options().output_is_position_independent())
4081 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
4082 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
4083 write_insn<big_endian>(p + 8, mtctr_12);
4084 write_insn<big_endian>(p + 12, bctr);
4089 write_insn<big_endian>(p + 0, mflr_0);
4090 write_insn<big_endian>(p + 4, bcl_20_31);
4091 write_insn<big_endian>(p + 8, mflr_12);
4092 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
4093 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
4094 write_insn<big_endian>(p + 20, mtlr_0);
4095 write_insn<big_endian>(p + 24, mtctr_12);
4096 write_insn<big_endian>(p + 28, bctr);
4102 // Write out .glink.
4104 template<int size, bool big_endian>
4106 Output_data_glink<size, big_endian>::do_write(Output_file* of)
4108 const section_size_type off = this->offset();
4109 const section_size_type oview_size =
4110 convert_to_section_size_type(this->data_size());
4111 unsigned char* const oview = of->get_output_view(off, oview_size);
4114 // The base address of the .plt section.
4115 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4116 Address plt_base = this->targ_->plt_section()->address();
4120 // Write pltresolve stub.
4122 Address after_bcl = this->address() + 16;
4123 Address pltoff = plt_base - after_bcl;
4125 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
4127 write_insn<big_endian>(p, mflr_12), p += 4;
4128 write_insn<big_endian>(p, bcl_20_31), p += 4;
4129 write_insn<big_endian>(p, mflr_11), p += 4;
4130 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
4131 write_insn<big_endian>(p, mtlr_12), p += 4;
4132 write_insn<big_endian>(p, add_12_2_11), p += 4;
4133 write_insn<big_endian>(p, ld_11_12 + 0), p += 4;
4134 write_insn<big_endian>(p, ld_2_12 + 8), p += 4;
4135 write_insn<big_endian>(p, mtctr_11), p += 4;
4136 write_insn<big_endian>(p, ld_11_12 + 16), p += 4;
4137 write_insn<big_endian>(p, bctr), p += 4;
4138 while (p < oview + this->pltresolve_size)
4139 write_insn<big_endian>(p, nop), p += 4;
4141 // Write lazy link call stubs.
4143 while (p < oview + oview_size)
4147 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
4151 write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4;
4152 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
4154 uint32_t branch_off = 8 - (p - oview);
4155 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
4161 const Output_data_got_powerpc<size, big_endian>* got
4162 = this->targ_->got_section();
4163 // The address of _GLOBAL_OFFSET_TABLE_.
4164 Address g_o_t = got->address() + got->g_o_t();
4166 // Write out pltresolve branch table.
4168 unsigned int the_end = oview_size - this->pltresolve_size;
4169 unsigned char* end_p = oview + the_end;
4170 while (p < end_p - 8 * 4)
4171 write_insn<big_endian>(p, b + end_p - p), p += 4;
4173 write_insn<big_endian>(p, nop), p += 4;
4175 // Write out pltresolve call stub.
4176 if (parameters->options().output_is_position_independent())
4178 Address res0_off = 0;
4179 Address after_bcl_off = the_end + 12;
4180 Address bcl_res0 = after_bcl_off - res0_off;
4182 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
4183 write_insn<big_endian>(p + 4, mflr_0);
4184 write_insn<big_endian>(p + 8, bcl_20_31);
4185 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
4186 write_insn<big_endian>(p + 16, mflr_12);
4187 write_insn<big_endian>(p + 20, mtlr_0);
4188 write_insn<big_endian>(p + 24, sub_11_11_12);
4190 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
4192 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
4193 if (ha(got_bcl) == ha(got_bcl + 4))
4195 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
4196 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
4200 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
4201 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
4203 write_insn<big_endian>(p + 40, mtctr_0);
4204 write_insn<big_endian>(p + 44, add_0_11_11);
4205 write_insn<big_endian>(p + 48, add_11_0_11);
4206 write_insn<big_endian>(p + 52, bctr);
4207 write_insn<big_endian>(p + 56, nop);
4208 write_insn<big_endian>(p + 60, nop);
4212 Address res0 = this->address();
4214 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
4215 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
4216 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4217 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
4219 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
4220 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
4221 write_insn<big_endian>(p + 16, mtctr_0);
4222 write_insn<big_endian>(p + 20, add_0_11_11);
4223 if (ha(g_o_t + 4) == ha(g_o_t + 8))
4224 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
4226 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
4227 write_insn<big_endian>(p + 28, add_11_0_11);
4228 write_insn<big_endian>(p + 32, bctr);
4229 write_insn<big_endian>(p + 36, nop);
4230 write_insn<big_endian>(p + 40, nop);
4231 write_insn<big_endian>(p + 44, nop);
4232 write_insn<big_endian>(p + 48, nop);
4233 write_insn<big_endian>(p + 52, nop);
4234 write_insn<big_endian>(p + 56, nop);
4235 write_insn<big_endian>(p + 60, nop);
4240 of->write_output_view(off, oview_size, oview);
4244 // A class to handle linker generated save/restore functions.
4246 template<int size, bool big_endian>
4247 class Output_data_save_res : public Output_section_data_build
4250 Output_data_save_res(Symbol_table* symtab);
4253 // Write to a map file.
4255 do_print_to_mapfile(Mapfile* mapfile) const
4256 { mapfile->print_output_data(this, _("** save/restore")); }
4259 do_write(Output_file*);
4262 // The maximum size of save/restore contents.
4263 static const unsigned int savres_max = 218*4;
4266 savres_define(Symbol_table* symtab,
4268 unsigned int lo, unsigned int hi,
4269 unsigned char* write_ent(unsigned char*, int),
4270 unsigned char* write_tail(unsigned char*, int));
4272 unsigned char *contents_;
4275 template<bool big_endian>
4276 static unsigned char*
4277 savegpr0(unsigned char* p, int r)
4279 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4280 write_insn<big_endian>(p, insn);
4284 template<bool big_endian>
4285 static unsigned char*
4286 savegpr0_tail(unsigned char* p, int r)
4288 p = savegpr0<big_endian>(p, r);
4289 uint32_t insn = std_0_1 + 16;
4290 write_insn<big_endian>(p, insn);
4292 write_insn<big_endian>(p, blr);
4296 template<bool big_endian>
4297 static unsigned char*
4298 restgpr0(unsigned char* p, int r)
4300 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4301 write_insn<big_endian>(p, insn);
4305 template<bool big_endian>
4306 static unsigned char*
4307 restgpr0_tail(unsigned char* p, int r)
4309 uint32_t insn = ld_0_1 + 16;
4310 write_insn<big_endian>(p, insn);
4312 p = restgpr0<big_endian>(p, r);
4313 write_insn<big_endian>(p, mtlr_0);
4317 p = restgpr0<big_endian>(p, 30);
4318 p = restgpr0<big_endian>(p, 31);
4320 write_insn<big_endian>(p, blr);
4324 template<bool big_endian>
4325 static unsigned char*
4326 savegpr1(unsigned char* p, int r)
4328 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4329 write_insn<big_endian>(p, insn);
4333 template<bool big_endian>
4334 static unsigned char*
4335 savegpr1_tail(unsigned char* p, int r)
4337 p = savegpr1<big_endian>(p, r);
4338 write_insn<big_endian>(p, blr);
4342 template<bool big_endian>
4343 static unsigned char*
4344 restgpr1(unsigned char* p, int r)
4346 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
4347 write_insn<big_endian>(p, insn);
4351 template<bool big_endian>
4352 static unsigned char*
4353 restgpr1_tail(unsigned char* p, int r)
4355 p = restgpr1<big_endian>(p, r);
4356 write_insn<big_endian>(p, blr);
4360 template<bool big_endian>
4361 static unsigned char*
4362 savefpr(unsigned char* p, int r)
4364 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4365 write_insn<big_endian>(p, insn);
4369 template<bool big_endian>
4370 static unsigned char*
4371 savefpr0_tail(unsigned char* p, int r)
4373 p = savefpr<big_endian>(p, r);
4374 write_insn<big_endian>(p, std_0_1 + 16);
4376 write_insn<big_endian>(p, blr);
4380 template<bool big_endian>
4381 static unsigned char*
4382 restfpr(unsigned char* p, int r)
4384 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
4385 write_insn<big_endian>(p, insn);
4389 template<bool big_endian>
4390 static unsigned char*
4391 restfpr0_tail(unsigned char* p, int r)
4393 write_insn<big_endian>(p, ld_0_1 + 16);
4395 p = restfpr<big_endian>(p, r);
4396 write_insn<big_endian>(p, mtlr_0);
4400 p = restfpr<big_endian>(p, 30);
4401 p = restfpr<big_endian>(p, 31);
4403 write_insn<big_endian>(p, blr);
4407 template<bool big_endian>
4408 static unsigned char*
4409 savefpr1_tail(unsigned char* p, int r)
4411 p = savefpr<big_endian>(p, r);
4412 write_insn<big_endian>(p, blr);
4416 template<bool big_endian>
4417 static unsigned char*
4418 restfpr1_tail(unsigned char* p, int r)
4420 p = restfpr<big_endian>(p, r);
4421 write_insn<big_endian>(p, blr);
4425 template<bool big_endian>
4426 static unsigned char*
4427 savevr(unsigned char* p, int r)
4429 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
4430 write_insn<big_endian>(p, insn);
4432 insn = stvx_0_12_0 + (r << 21);
4433 write_insn<big_endian>(p, insn);
4437 template<bool big_endian>
4438 static unsigned char*
4439 savevr_tail(unsigned char* p, int r)
4441 p = savevr<big_endian>(p, r);
4442 write_insn<big_endian>(p, blr);
4446 template<bool big_endian>
4447 static unsigned char*
4448 restvr(unsigned char* p, int r)
4450 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
4451 write_insn<big_endian>(p, insn);
4453 insn = lvx_0_12_0 + (r << 21);
4454 write_insn<big_endian>(p, insn);
4458 template<bool big_endian>
4459 static unsigned char*
4460 restvr_tail(unsigned char* p, int r)
4462 p = restvr<big_endian>(p, r);
4463 write_insn<big_endian>(p, blr);
4468 template<int size, bool big_endian>
4469 Output_data_save_res<size, big_endian>::Output_data_save_res(
4470 Symbol_table* symtab)
4471 : Output_section_data_build(4),
4474 this->savres_define(symtab,
4475 "_savegpr0_", 14, 31,
4476 savegpr0<big_endian>, savegpr0_tail<big_endian>);
4477 this->savres_define(symtab,
4478 "_restgpr0_", 14, 29,
4479 restgpr0<big_endian>, restgpr0_tail<big_endian>);
4480 this->savres_define(symtab,
4481 "_restgpr0_", 30, 31,
4482 restgpr0<big_endian>, restgpr0_tail<big_endian>);
4483 this->savres_define(symtab,
4484 "_savegpr1_", 14, 31,
4485 savegpr1<big_endian>, savegpr1_tail<big_endian>);
4486 this->savres_define(symtab,
4487 "_restgpr1_", 14, 31,
4488 restgpr1<big_endian>, restgpr1_tail<big_endian>);
4489 this->savres_define(symtab,
4490 "_savefpr_", 14, 31,
4491 savefpr<big_endian>, savefpr0_tail<big_endian>);
4492 this->savres_define(symtab,
4493 "_restfpr_", 14, 29,
4494 restfpr<big_endian>, restfpr0_tail<big_endian>);
4495 this->savres_define(symtab,
4496 "_restfpr_", 30, 31,
4497 restfpr<big_endian>, restfpr0_tail<big_endian>);
4498 this->savres_define(symtab,
4500 savefpr<big_endian>, savefpr1_tail<big_endian>);
4501 this->savres_define(symtab,
4503 restfpr<big_endian>, restfpr1_tail<big_endian>);
4504 this->savres_define(symtab,
4506 savevr<big_endian>, savevr_tail<big_endian>);
4507 this->savres_define(symtab,
4509 restvr<big_endian>, restvr_tail<big_endian>);
4512 template<int size, bool big_endian>
4514 Output_data_save_res<size, big_endian>::savres_define(
4515 Symbol_table* symtab,
4517 unsigned int lo, unsigned int hi,
4518 unsigned char* write_ent(unsigned char*, int),
4519 unsigned char* write_tail(unsigned char*, int))
4521 size_t len = strlen(name);
4522 bool writing = false;
4525 memcpy(sym, name, len);
4528 for (unsigned int i = lo; i <= hi; i++)
4530 sym[len + 0] = i / 10 + '0';
4531 sym[len + 1] = i % 10 + '0';
4532 Symbol* gsym = symtab->lookup(sym);
4533 bool refd = gsym != NULL && gsym->is_undefined();
4534 writing = writing || refd;
4537 if (this->contents_ == NULL)
4538 this->contents_ = new unsigned char[this->savres_max];
4540 section_size_type value = this->current_data_size();
4541 unsigned char* p = this->contents_ + value;
4543 p = write_ent(p, i);
4545 p = write_tail(p, i);
4546 section_size_type cur_size = p - this->contents_;
4547 this->set_current_data_size(cur_size);
4549 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
4550 this, value, cur_size - value,
4551 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
4552 elfcpp::STV_HIDDEN, 0, false, false);
4557 // Write out save/restore.
4559 template<int size, bool big_endian>
4561 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
4563 const section_size_type off = this->offset();
4564 const section_size_type oview_size =
4565 convert_to_section_size_type(this->data_size());
4566 unsigned char* const oview = of->get_output_view(off, oview_size);
4567 memcpy(oview, this->contents_, oview_size);
4568 of->write_output_view(off, oview_size, oview);
4572 // Create the glink section.
4574 template<int size, bool big_endian>
4576 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
4578 if (this->glink_ == NULL)
4580 this->glink_ = new Output_data_glink<size, big_endian>(this);
4581 this->glink_->add_eh_frame(layout);
4582 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
4583 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
4584 this->glink_, ORDER_TEXT, false);
4588 // Create a PLT entry for a global symbol.
4590 template<int size, bool big_endian>
4592 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
4596 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4597 && gsym->can_use_relative_reloc(false))
4599 if (this->iplt_ == NULL)
4600 this->make_iplt_section(symtab, layout);
4601 this->iplt_->add_ifunc_entry(gsym);
4605 if (this->plt_ == NULL)
4606 this->make_plt_section(symtab, layout);
4607 this->plt_->add_entry(gsym);
4611 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4613 template<int size, bool big_endian>
4615 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
4616 Symbol_table* symtab,
4618 Sized_relobj_file<size, big_endian>* relobj,
4621 if (this->iplt_ == NULL)
4622 this->make_iplt_section(symtab, layout);
4623 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
4626 // Return the number of entries in the PLT.
4628 template<int size, bool big_endian>
4630 Target_powerpc<size, big_endian>::plt_entry_count() const
4632 if (this->plt_ == NULL)
4634 return this->plt_->entry_count();
4637 // Return the offset of the first non-reserved PLT entry.
4639 template<int size, bool big_endian>
4641 Target_powerpc<size, big_endian>::first_plt_entry_offset() const
4643 return this->plt_->first_plt_entry_offset();
4646 // Return the size of each PLT entry.
4648 template<int size, bool big_endian>
4650 Target_powerpc<size, big_endian>::plt_entry_size() const
4652 return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size();
4655 // Create a GOT entry for local dynamic __tls_get_addr calls.
4657 template<int size, bool big_endian>
4659 Target_powerpc<size, big_endian>::tlsld_got_offset(
4660 Symbol_table* symtab,
4662 Sized_relobj_file<size, big_endian>* object)
4664 if (this->tlsld_got_offset_ == -1U)
4666 gold_assert(symtab != NULL && layout != NULL && object != NULL);
4667 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
4668 Output_data_got_powerpc<size, big_endian>* got
4669 = this->got_section(symtab, layout);
4670 unsigned int got_offset = got->add_constant_pair(0, 0);
4671 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
4673 this->tlsld_got_offset_ = got_offset;
4675 return this->tlsld_got_offset_;
4678 // Get the Reference_flags for a particular relocation.
4680 template<int size, bool big_endian>
4682 Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
4686 case elfcpp::R_POWERPC_NONE:
4687 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4688 case elfcpp::R_POWERPC_GNU_VTENTRY:
4689 case elfcpp::R_PPC64_TOC:
4690 // No symbol reference.
4693 case elfcpp::R_PPC64_ADDR64:
4694 case elfcpp::R_PPC64_UADDR64:
4695 case elfcpp::R_POWERPC_ADDR32:
4696 case elfcpp::R_POWERPC_UADDR32:
4697 case elfcpp::R_POWERPC_ADDR16:
4698 case elfcpp::R_POWERPC_UADDR16:
4699 case elfcpp::R_POWERPC_ADDR16_LO:
4700 case elfcpp::R_POWERPC_ADDR16_HI:
4701 case elfcpp::R_POWERPC_ADDR16_HA:
4702 return Symbol::ABSOLUTE_REF;
4704 case elfcpp::R_POWERPC_ADDR24:
4705 case elfcpp::R_POWERPC_ADDR14:
4706 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4707 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4708 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
4710 case elfcpp::R_PPC64_REL64:
4711 case elfcpp::R_POWERPC_REL32:
4712 case elfcpp::R_PPC_LOCAL24PC:
4713 case elfcpp::R_POWERPC_REL16:
4714 case elfcpp::R_POWERPC_REL16_LO:
4715 case elfcpp::R_POWERPC_REL16_HI:
4716 case elfcpp::R_POWERPC_REL16_HA:
4717 return Symbol::RELATIVE_REF;
4719 case elfcpp::R_POWERPC_REL24:
4720 case elfcpp::R_PPC_PLTREL24:
4721 case elfcpp::R_POWERPC_REL14:
4722 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4723 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4724 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
4726 case elfcpp::R_POWERPC_GOT16:
4727 case elfcpp::R_POWERPC_GOT16_LO:
4728 case elfcpp::R_POWERPC_GOT16_HI:
4729 case elfcpp::R_POWERPC_GOT16_HA:
4730 case elfcpp::R_PPC64_GOT16_DS:
4731 case elfcpp::R_PPC64_GOT16_LO_DS:
4732 case elfcpp::R_PPC64_TOC16:
4733 case elfcpp::R_PPC64_TOC16_LO:
4734 case elfcpp::R_PPC64_TOC16_HI:
4735 case elfcpp::R_PPC64_TOC16_HA:
4736 case elfcpp::R_PPC64_TOC16_DS:
4737 case elfcpp::R_PPC64_TOC16_LO_DS:
4739 return Symbol::ABSOLUTE_REF;
4741 case elfcpp::R_POWERPC_GOT_TPREL16:
4742 case elfcpp::R_POWERPC_TLS:
4743 return Symbol::TLS_REF;
4745 case elfcpp::R_POWERPC_COPY:
4746 case elfcpp::R_POWERPC_GLOB_DAT:
4747 case elfcpp::R_POWERPC_JMP_SLOT:
4748 case elfcpp::R_POWERPC_RELATIVE:
4749 case elfcpp::R_POWERPC_DTPMOD:
4751 // Not expected. We will give an error later.
4756 // Report an unsupported relocation against a local symbol.
4758 template<int size, bool big_endian>
4760 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
4761 Sized_relobj_file<size, big_endian>* object,
4762 unsigned int r_type)
4764 gold_error(_("%s: unsupported reloc %u against local symbol"),
4765 object->name().c_str(), r_type);
4768 // We are about to emit a dynamic relocation of type R_TYPE. If the
4769 // dynamic linker does not support it, issue an error.
4771 template<int size, bool big_endian>
4773 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
4774 unsigned int r_type)
4776 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
4778 // These are the relocation types supported by glibc for both 32-bit
4779 // and 64-bit powerpc.
4782 case elfcpp::R_POWERPC_NONE:
4783 case elfcpp::R_POWERPC_RELATIVE:
4784 case elfcpp::R_POWERPC_GLOB_DAT:
4785 case elfcpp::R_POWERPC_DTPMOD:
4786 case elfcpp::R_POWERPC_DTPREL:
4787 case elfcpp::R_POWERPC_TPREL:
4788 case elfcpp::R_POWERPC_JMP_SLOT:
4789 case elfcpp::R_POWERPC_COPY:
4790 case elfcpp::R_POWERPC_IRELATIVE:
4791 case elfcpp::R_POWERPC_ADDR32:
4792 case elfcpp::R_POWERPC_UADDR32:
4793 case elfcpp::R_POWERPC_ADDR24:
4794 case elfcpp::R_POWERPC_ADDR16:
4795 case elfcpp::R_POWERPC_UADDR16:
4796 case elfcpp::R_POWERPC_ADDR16_LO:
4797 case elfcpp::R_POWERPC_ADDR16_HI:
4798 case elfcpp::R_POWERPC_ADDR16_HA:
4799 case elfcpp::R_POWERPC_ADDR14:
4800 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4801 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4802 case elfcpp::R_POWERPC_REL32:
4803 case elfcpp::R_POWERPC_REL24:
4804 case elfcpp::R_POWERPC_TPREL16:
4805 case elfcpp::R_POWERPC_TPREL16_LO:
4806 case elfcpp::R_POWERPC_TPREL16_HI:
4807 case elfcpp::R_POWERPC_TPREL16_HA:
4818 // These are the relocation types supported only on 64-bit.
4819 case elfcpp::R_PPC64_ADDR64:
4820 case elfcpp::R_PPC64_UADDR64:
4821 case elfcpp::R_PPC64_JMP_IREL:
4822 case elfcpp::R_PPC64_ADDR16_DS:
4823 case elfcpp::R_PPC64_ADDR16_LO_DS:
4824 case elfcpp::R_PPC64_ADDR16_HIGHER:
4825 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4826 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4827 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4828 case elfcpp::R_PPC64_REL64:
4829 case elfcpp::R_POWERPC_ADDR30:
4830 case elfcpp::R_PPC64_TPREL16_DS:
4831 case elfcpp::R_PPC64_TPREL16_LO_DS:
4832 case elfcpp::R_PPC64_TPREL16_HIGHER:
4833 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4834 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4835 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4846 // These are the relocation types supported only on 32-bit.
4847 // ??? glibc ld.so doesn't need to support these.
4848 case elfcpp::R_POWERPC_DTPREL16:
4849 case elfcpp::R_POWERPC_DTPREL16_LO:
4850 case elfcpp::R_POWERPC_DTPREL16_HI:
4851 case elfcpp::R_POWERPC_DTPREL16_HA:
4859 // This prevents us from issuing more than one error per reloc
4860 // section. But we can still wind up issuing more than one
4861 // error per object file.
4862 if (this->issued_non_pic_error_)
4864 gold_assert(parameters->options().output_is_position_independent());
4865 object->error(_("requires unsupported dynamic reloc; "
4866 "recompile with -fPIC"));
4867 this->issued_non_pic_error_ = true;
4871 // Return whether we need to make a PLT entry for a relocation of the
4872 // given type against a STT_GNU_IFUNC symbol.
4874 template<int size, bool big_endian>
4876 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
4877 Sized_relobj_file<size, big_endian>* object,
4878 unsigned int r_type,
4881 // In non-pic code any reference will resolve to the plt call stub
4882 // for the ifunc symbol.
4883 if (size == 32 && !parameters->options().output_is_position_independent())
4888 // Word size refs from data sections are OK, but don't need a PLT entry.
4889 case elfcpp::R_POWERPC_ADDR32:
4890 case elfcpp::R_POWERPC_UADDR32:
4895 case elfcpp::R_PPC64_ADDR64:
4896 case elfcpp::R_PPC64_UADDR64:
4901 // GOT refs are good, but also don't need a PLT entry.
4902 case elfcpp::R_POWERPC_GOT16:
4903 case elfcpp::R_POWERPC_GOT16_LO:
4904 case elfcpp::R_POWERPC_GOT16_HI:
4905 case elfcpp::R_POWERPC_GOT16_HA:
4906 case elfcpp::R_PPC64_GOT16_DS:
4907 case elfcpp::R_PPC64_GOT16_LO_DS:
4910 // Function calls are good, and these do need a PLT entry.
4911 case elfcpp::R_POWERPC_ADDR24:
4912 case elfcpp::R_POWERPC_ADDR14:
4913 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4914 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4915 case elfcpp::R_POWERPC_REL24:
4916 case elfcpp::R_PPC_PLTREL24:
4917 case elfcpp::R_POWERPC_REL14:
4918 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4919 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4926 // Anything else is a problem.
4927 // If we are building a static executable, the libc startup function
4928 // responsible for applying indirect function relocations is going
4929 // to complain about the reloc type.
4930 // If we are building a dynamic executable, we will have a text
4931 // relocation. The dynamic loader will set the text segment
4932 // writable and non-executable to apply text relocations. So we'll
4933 // segfault when trying to run the indirection function to resolve
4936 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4937 object->name().c_str(), r_type);
4941 // Scan a relocation for a local symbol.
4943 template<int size, bool big_endian>
4945 Target_powerpc<size, big_endian>::Scan::local(
4946 Symbol_table* symtab,
4948 Target_powerpc<size, big_endian>* target,
4949 Sized_relobj_file<size, big_endian>* object,
4950 unsigned int data_shndx,
4951 Output_section* output_section,
4952 const elfcpp::Rela<size, big_endian>& reloc,
4953 unsigned int r_type,
4954 const elfcpp::Sym<size, big_endian>& lsym,
4957 this->maybe_skip_tls_get_addr_call(r_type, NULL);
4959 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
4960 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
4962 this->expect_tls_get_addr_call();
4963 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
4964 if (tls_type != tls::TLSOPT_NONE)
4965 this->skip_next_tls_get_addr_call();
4967 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
4968 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
4970 this->expect_tls_get_addr_call();
4971 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
4972 if (tls_type != tls::TLSOPT_NONE)
4973 this->skip_next_tls_get_addr_call();
4976 Powerpc_relobj<size, big_endian>* ppc_object
4977 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4982 && data_shndx == ppc_object->opd_shndx()
4983 && r_type == elfcpp::R_PPC64_ADDR64)
4984 ppc_object->set_opd_discard(reloc.get_r_offset());
4988 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4989 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
4990 if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type, true))
4992 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4993 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4994 r_type, r_sym, reloc.get_r_addend());
4995 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
5000 case elfcpp::R_POWERPC_NONE:
5001 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5002 case elfcpp::R_POWERPC_GNU_VTENTRY:
5003 case elfcpp::R_PPC64_TOCSAVE:
5004 case elfcpp::R_PPC_EMB_MRKREF:
5005 case elfcpp::R_POWERPC_TLS:
5008 case elfcpp::R_PPC64_TOC:
5010 Output_data_got_powerpc<size, big_endian>* got
5011 = target->got_section(symtab, layout);
5012 if (parameters->options().output_is_position_independent())
5014 Address off = reloc.get_r_offset();
5016 && data_shndx == ppc_object->opd_shndx()
5017 && ppc_object->get_opd_discard(off - 8))
5020 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5021 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5022 rela_dyn->add_output_section_relative(got->output_section(),
5023 elfcpp::R_POWERPC_RELATIVE,
5025 object, data_shndx, off,
5026 symobj->toc_base_offset());
5031 case elfcpp::R_PPC64_ADDR64:
5032 case elfcpp::R_PPC64_UADDR64:
5033 case elfcpp::R_POWERPC_ADDR32:
5034 case elfcpp::R_POWERPC_UADDR32:
5035 case elfcpp::R_POWERPC_ADDR24:
5036 case elfcpp::R_POWERPC_ADDR16:
5037 case elfcpp::R_POWERPC_ADDR16_LO:
5038 case elfcpp::R_POWERPC_ADDR16_HI:
5039 case elfcpp::R_POWERPC_ADDR16_HA:
5040 case elfcpp::R_POWERPC_UADDR16:
5041 case elfcpp::R_PPC64_ADDR16_HIGHER:
5042 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5043 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5044 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5045 case elfcpp::R_PPC64_ADDR16_DS:
5046 case elfcpp::R_PPC64_ADDR16_LO_DS:
5047 case elfcpp::R_POWERPC_ADDR14:
5048 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5049 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5050 // If building a shared library (or a position-independent
5051 // executable), we need to create a dynamic relocation for
5053 if (parameters->options().output_is_position_independent()
5054 || (size == 64 && is_ifunc))
5056 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5058 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
5059 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
5061 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5062 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5063 : elfcpp::R_POWERPC_RELATIVE);
5064 rela_dyn->add_local_relative(object, r_sym, dynrel,
5065 output_section, data_shndx,
5066 reloc.get_r_offset(),
5067 reloc.get_r_addend(), false);
5071 check_non_pic(object, r_type);
5072 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5073 rela_dyn->add_local(object, r_sym, r_type, output_section,
5074 data_shndx, reloc.get_r_offset(),
5075 reloc.get_r_addend());
5080 case elfcpp::R_POWERPC_REL24:
5081 case elfcpp::R_PPC_PLTREL24:
5082 case elfcpp::R_PPC_LOCAL24PC:
5083 case elfcpp::R_POWERPC_REL14:
5084 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5085 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5087 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5088 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5089 reloc.get_r_addend());
5092 case elfcpp::R_PPC64_REL64:
5093 case elfcpp::R_POWERPC_REL32:
5094 case elfcpp::R_POWERPC_REL16:
5095 case elfcpp::R_POWERPC_REL16_LO:
5096 case elfcpp::R_POWERPC_REL16_HI:
5097 case elfcpp::R_POWERPC_REL16_HA:
5098 case elfcpp::R_POWERPC_SECTOFF:
5099 case elfcpp::R_POWERPC_TPREL16:
5100 case elfcpp::R_POWERPC_DTPREL16:
5101 case elfcpp::R_POWERPC_SECTOFF_LO:
5102 case elfcpp::R_POWERPC_TPREL16_LO:
5103 case elfcpp::R_POWERPC_DTPREL16_LO:
5104 case elfcpp::R_POWERPC_SECTOFF_HI:
5105 case elfcpp::R_POWERPC_TPREL16_HI:
5106 case elfcpp::R_POWERPC_DTPREL16_HI:
5107 case elfcpp::R_POWERPC_SECTOFF_HA:
5108 case elfcpp::R_POWERPC_TPREL16_HA:
5109 case elfcpp::R_POWERPC_DTPREL16_HA:
5110 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5111 case elfcpp::R_PPC64_TPREL16_HIGHER:
5112 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5113 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5114 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5115 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5116 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5117 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5118 case elfcpp::R_PPC64_TPREL16_DS:
5119 case elfcpp::R_PPC64_TPREL16_LO_DS:
5120 case elfcpp::R_PPC64_DTPREL16_DS:
5121 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5122 case elfcpp::R_PPC64_SECTOFF_DS:
5123 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5124 case elfcpp::R_PPC64_TLSGD:
5125 case elfcpp::R_PPC64_TLSLD:
5128 case elfcpp::R_POWERPC_GOT16:
5129 case elfcpp::R_POWERPC_GOT16_LO:
5130 case elfcpp::R_POWERPC_GOT16_HI:
5131 case elfcpp::R_POWERPC_GOT16_HA:
5132 case elfcpp::R_PPC64_GOT16_DS:
5133 case elfcpp::R_PPC64_GOT16_LO_DS:
5135 // The symbol requires a GOT entry.
5136 Output_data_got_powerpc<size, big_endian>* got
5137 = target->got_section(symtab, layout);
5138 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5140 if (!parameters->options().output_is_position_independent())
5142 if (size == 32 && is_ifunc)
5143 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
5145 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
5147 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
5149 // If we are generating a shared object or a pie, this
5150 // symbol's GOT entry will be set by a dynamic relocation.
5152 off = got->add_constant(0);
5153 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
5155 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
5157 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5158 : elfcpp::R_POWERPC_RELATIVE);
5159 rela_dyn->add_local_relative(object, r_sym, dynrel,
5160 got, off, 0, false);
5165 case elfcpp::R_PPC64_TOC16:
5166 case elfcpp::R_PPC64_TOC16_LO:
5167 case elfcpp::R_PPC64_TOC16_HI:
5168 case elfcpp::R_PPC64_TOC16_HA:
5169 case elfcpp::R_PPC64_TOC16_DS:
5170 case elfcpp::R_PPC64_TOC16_LO_DS:
5171 // We need a GOT section.
5172 target->got_section(symtab, layout);
5175 case elfcpp::R_POWERPC_GOT_TLSGD16:
5176 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5177 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5178 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5180 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
5181 if (tls_type == tls::TLSOPT_NONE)
5183 Output_data_got_powerpc<size, big_endian>* got
5184 = target->got_section(symtab, layout);
5185 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5186 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5187 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
5188 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
5190 else if (tls_type == tls::TLSOPT_TO_LE)
5192 // no GOT relocs needed for Local Exec.
5199 case elfcpp::R_POWERPC_GOT_TLSLD16:
5200 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5201 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5202 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5204 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5205 if (tls_type == tls::TLSOPT_NONE)
5206 target->tlsld_got_offset(symtab, layout, object);
5207 else if (tls_type == tls::TLSOPT_TO_LE)
5209 // no GOT relocs needed for Local Exec.
5210 if (parameters->options().emit_relocs())
5212 Output_section* os = layout->tls_segment()->first_section();
5213 gold_assert(os != NULL);
5214 os->set_needs_symtab_index();
5222 case elfcpp::R_POWERPC_GOT_DTPREL16:
5223 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5224 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5225 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5227 Output_data_got_powerpc<size, big_endian>* got
5228 = target->got_section(symtab, layout);
5229 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5230 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
5234 case elfcpp::R_POWERPC_GOT_TPREL16:
5235 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5236 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5237 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5239 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
5240 if (tls_type == tls::TLSOPT_NONE)
5242 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
5243 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
5245 Output_data_got_powerpc<size, big_endian>* got
5246 = target->got_section(symtab, layout);
5247 unsigned int off = got->add_constant(0);
5248 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
5250 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5251 rela_dyn->add_symbolless_local_addend(object, r_sym,
5252 elfcpp::R_POWERPC_TPREL,
5256 else if (tls_type == tls::TLSOPT_TO_LE)
5258 // no GOT relocs needed for Local Exec.
5266 unsupported_reloc_local(object, r_type);
5272 case elfcpp::R_POWERPC_GOT_TLSLD16:
5273 case elfcpp::R_POWERPC_GOT_TLSGD16:
5274 case elfcpp::R_POWERPC_GOT_TPREL16:
5275 case elfcpp::R_POWERPC_GOT_DTPREL16:
5276 case elfcpp::R_POWERPC_GOT16:
5277 case elfcpp::R_PPC64_GOT16_DS:
5278 case elfcpp::R_PPC64_TOC16:
5279 case elfcpp::R_PPC64_TOC16_DS:
5280 ppc_object->set_has_small_toc_reloc();
5286 // Report an unsupported relocation against a global symbol.
5288 template<int size, bool big_endian>
5290 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
5291 Sized_relobj_file<size, big_endian>* object,
5292 unsigned int r_type,
5295 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5296 object->name().c_str(), r_type, gsym->demangled_name().c_str());
5299 // Scan a relocation for a global symbol.
5301 template<int size, bool big_endian>
5303 Target_powerpc<size, big_endian>::Scan::global(
5304 Symbol_table* symtab,
5306 Target_powerpc<size, big_endian>* target,
5307 Sized_relobj_file<size, big_endian>* object,
5308 unsigned int data_shndx,
5309 Output_section* output_section,
5310 const elfcpp::Rela<size, big_endian>& reloc,
5311 unsigned int r_type,
5314 if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP)
5317 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5318 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5320 this->expect_tls_get_addr_call();
5321 const bool final = gsym->final_value_is_known();
5322 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5323 if (tls_type != tls::TLSOPT_NONE)
5324 this->skip_next_tls_get_addr_call();
5326 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5327 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5329 this->expect_tls_get_addr_call();
5330 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5331 if (tls_type != tls::TLSOPT_NONE)
5332 this->skip_next_tls_get_addr_call();
5335 Powerpc_relobj<size, big_endian>* ppc_object
5336 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5338 // A STT_GNU_IFUNC symbol may require a PLT entry.
5339 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
5340 if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type, true))
5342 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5343 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5344 reloc.get_r_addend());
5345 target->make_plt_entry(symtab, layout, gsym);
5350 case elfcpp::R_POWERPC_NONE:
5351 case elfcpp::R_POWERPC_GNU_VTINHERIT:
5352 case elfcpp::R_POWERPC_GNU_VTENTRY:
5353 case elfcpp::R_PPC_LOCAL24PC:
5354 case elfcpp::R_PPC_EMB_MRKREF:
5355 case elfcpp::R_POWERPC_TLS:
5358 case elfcpp::R_PPC64_TOC:
5360 Output_data_got_powerpc<size, big_endian>* got
5361 = target->got_section(symtab, layout);
5362 if (parameters->options().output_is_position_independent())
5364 Address off = reloc.get_r_offset();
5366 && data_shndx == ppc_object->opd_shndx()
5367 && ppc_object->get_opd_discard(off - 8))
5370 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5371 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
5372 if (data_shndx != ppc_object->opd_shndx())
5373 symobj = static_cast
5374 <Powerpc_relobj<size, big_endian>*>(gsym->object());
5375 rela_dyn->add_output_section_relative(got->output_section(),
5376 elfcpp::R_POWERPC_RELATIVE,
5378 object, data_shndx, off,
5379 symobj->toc_base_offset());
5384 case elfcpp::R_PPC64_ADDR64:
5386 && data_shndx == ppc_object->opd_shndx()
5387 && (gsym->is_defined_in_discarded_section()
5388 || gsym->object() != object))
5390 ppc_object->set_opd_discard(reloc.get_r_offset());
5394 case elfcpp::R_PPC64_UADDR64:
5395 case elfcpp::R_POWERPC_ADDR32:
5396 case elfcpp::R_POWERPC_UADDR32:
5397 case elfcpp::R_POWERPC_ADDR24:
5398 case elfcpp::R_POWERPC_ADDR16:
5399 case elfcpp::R_POWERPC_ADDR16_LO:
5400 case elfcpp::R_POWERPC_ADDR16_HI:
5401 case elfcpp::R_POWERPC_ADDR16_HA:
5402 case elfcpp::R_POWERPC_UADDR16:
5403 case elfcpp::R_PPC64_ADDR16_HIGHER:
5404 case elfcpp::R_PPC64_ADDR16_HIGHERA:
5405 case elfcpp::R_PPC64_ADDR16_HIGHEST:
5406 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
5407 case elfcpp::R_PPC64_ADDR16_DS:
5408 case elfcpp::R_PPC64_ADDR16_LO_DS:
5409 case elfcpp::R_POWERPC_ADDR14:
5410 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
5411 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
5413 // Make a PLT entry if necessary.
5414 if (gsym->needs_plt_entry())
5418 target->push_branch(ppc_object, data_shndx,
5419 reloc.get_r_offset(), r_type,
5420 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5421 reloc.get_r_addend());
5422 target->make_plt_entry(symtab, layout, gsym);
5424 // Since this is not a PC-relative relocation, we may be
5425 // taking the address of a function. In that case we need to
5426 // set the entry in the dynamic symbol table to the address of
5427 // the PLT call stub.
5429 && gsym->is_from_dynobj()
5430 && !parameters->options().output_is_position_independent())
5431 gsym->set_needs_dynsym_value();
5433 // Make a dynamic relocation if necessary.
5434 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))
5435 || (size == 64 && is_ifunc))
5437 if (gsym->may_need_copy_reloc())
5439 target->copy_reloc(symtab, layout, object,
5440 data_shndx, output_section, gsym, reloc);
5442 else if ((size == 32
5443 && r_type == elfcpp::R_POWERPC_ADDR32
5444 && gsym->can_use_relative_reloc(false)
5445 && !(gsym->visibility() == elfcpp::STV_PROTECTED
5446 && parameters->options().shared()))
5448 && r_type == elfcpp::R_PPC64_ADDR64
5449 && (gsym->can_use_relative_reloc(false)
5450 || data_shndx == ppc_object->opd_shndx())))
5452 Reloc_section* rela_dyn
5453 = target->rela_dyn_section(symtab, layout, is_ifunc);
5454 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5455 : elfcpp::R_POWERPC_RELATIVE);
5456 rela_dyn->add_symbolless_global_addend(
5457 gsym, dynrel, output_section, object, data_shndx,
5458 reloc.get_r_offset(), reloc.get_r_addend());
5462 Reloc_section* rela_dyn
5463 = target->rela_dyn_section(symtab, layout, is_ifunc);
5464 check_non_pic(object, r_type);
5465 rela_dyn->add_global(gsym, r_type, output_section,
5467 reloc.get_r_offset(),
5468 reloc.get_r_addend());
5474 case elfcpp::R_PPC_PLTREL24:
5475 case elfcpp::R_POWERPC_REL24:
5478 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5480 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5481 reloc.get_r_addend());
5482 if (gsym->needs_plt_entry()
5483 || (!gsym->final_value_is_known()
5484 && (gsym->is_undefined()
5485 || gsym->is_from_dynobj()
5486 || gsym->is_preemptible())))
5487 target->make_plt_entry(symtab, layout, gsym);
5491 case elfcpp::R_PPC64_REL64:
5492 case elfcpp::R_POWERPC_REL32:
5493 // Make a dynamic relocation if necessary.
5494 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)))
5496 if (gsym->may_need_copy_reloc())
5498 target->copy_reloc(symtab, layout, object,
5499 data_shndx, output_section, gsym,
5504 Reloc_section* rela_dyn
5505 = target->rela_dyn_section(symtab, layout, is_ifunc);
5506 check_non_pic(object, r_type);
5507 rela_dyn->add_global(gsym, r_type, output_section, object,
5508 data_shndx, reloc.get_r_offset(),
5509 reloc.get_r_addend());
5514 case elfcpp::R_POWERPC_REL14:
5515 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5516 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5518 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5519 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5520 reloc.get_r_addend());
5523 case elfcpp::R_POWERPC_REL16:
5524 case elfcpp::R_POWERPC_REL16_LO:
5525 case elfcpp::R_POWERPC_REL16_HI:
5526 case elfcpp::R_POWERPC_REL16_HA:
5527 case elfcpp::R_POWERPC_SECTOFF:
5528 case elfcpp::R_POWERPC_TPREL16:
5529 case elfcpp::R_POWERPC_DTPREL16:
5530 case elfcpp::R_POWERPC_SECTOFF_LO:
5531 case elfcpp::R_POWERPC_TPREL16_LO:
5532 case elfcpp::R_POWERPC_DTPREL16_LO:
5533 case elfcpp::R_POWERPC_SECTOFF_HI:
5534 case elfcpp::R_POWERPC_TPREL16_HI:
5535 case elfcpp::R_POWERPC_DTPREL16_HI:
5536 case elfcpp::R_POWERPC_SECTOFF_HA:
5537 case elfcpp::R_POWERPC_TPREL16_HA:
5538 case elfcpp::R_POWERPC_DTPREL16_HA:
5539 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5540 case elfcpp::R_PPC64_TPREL16_HIGHER:
5541 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5542 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5543 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5544 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5545 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5546 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5547 case elfcpp::R_PPC64_TPREL16_DS:
5548 case elfcpp::R_PPC64_TPREL16_LO_DS:
5549 case elfcpp::R_PPC64_DTPREL16_DS:
5550 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5551 case elfcpp::R_PPC64_SECTOFF_DS:
5552 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5553 case elfcpp::R_PPC64_TLSGD:
5554 case elfcpp::R_PPC64_TLSLD:
5557 case elfcpp::R_POWERPC_GOT16:
5558 case elfcpp::R_POWERPC_GOT16_LO:
5559 case elfcpp::R_POWERPC_GOT16_HI:
5560 case elfcpp::R_POWERPC_GOT16_HA:
5561 case elfcpp::R_PPC64_GOT16_DS:
5562 case elfcpp::R_PPC64_GOT16_LO_DS:
5564 // The symbol requires a GOT entry.
5565 Output_data_got_powerpc<size, big_endian>* got;
5567 got = target->got_section(symtab, layout);
5568 if (gsym->final_value_is_known())
5570 if (size == 32 && is_ifunc)
5571 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
5573 got->add_global(gsym, GOT_TYPE_STANDARD);
5575 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
5577 // If we are generating a shared object or a pie, this
5578 // symbol's GOT entry will be set by a dynamic relocation.
5579 unsigned int off = got->add_constant(0);
5580 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
5582 Reloc_section* rela_dyn
5583 = target->rela_dyn_section(symtab, layout, is_ifunc);
5585 if (gsym->can_use_relative_reloc(false)
5587 && gsym->visibility() == elfcpp::STV_PROTECTED
5588 && parameters->options().shared()))
5590 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
5591 : elfcpp::R_POWERPC_RELATIVE);
5592 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
5596 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
5597 rela_dyn->add_global(gsym, dynrel, got, off, 0);
5603 case elfcpp::R_PPC64_TOC16:
5604 case elfcpp::R_PPC64_TOC16_LO:
5605 case elfcpp::R_PPC64_TOC16_HI:
5606 case elfcpp::R_PPC64_TOC16_HA:
5607 case elfcpp::R_PPC64_TOC16_DS:
5608 case elfcpp::R_PPC64_TOC16_LO_DS:
5609 // We need a GOT section.
5610 target->got_section(symtab, layout);
5613 case elfcpp::R_POWERPC_GOT_TLSGD16:
5614 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5615 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5616 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5618 const bool final = gsym->final_value_is_known();
5619 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5620 if (tls_type == tls::TLSOPT_NONE)
5622 Output_data_got_powerpc<size, big_endian>* got
5623 = target->got_section(symtab, layout);
5624 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5625 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn,
5626 elfcpp::R_POWERPC_DTPMOD,
5627 elfcpp::R_POWERPC_DTPREL);
5629 else if (tls_type == tls::TLSOPT_TO_IE)
5631 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5633 Output_data_got_powerpc<size, big_endian>* got
5634 = target->got_section(symtab, layout);
5635 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5636 if (gsym->is_undefined()
5637 || gsym->is_from_dynobj())
5639 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5640 elfcpp::R_POWERPC_TPREL);
5644 unsigned int off = got->add_constant(0);
5645 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5646 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5647 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5652 else if (tls_type == tls::TLSOPT_TO_LE)
5654 // no GOT relocs needed for Local Exec.
5661 case elfcpp::R_POWERPC_GOT_TLSLD16:
5662 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5663 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5664 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5666 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5667 if (tls_type == tls::TLSOPT_NONE)
5668 target->tlsld_got_offset(symtab, layout, object);
5669 else if (tls_type == tls::TLSOPT_TO_LE)
5671 // no GOT relocs needed for Local Exec.
5672 if (parameters->options().emit_relocs())
5674 Output_section* os = layout->tls_segment()->first_section();
5675 gold_assert(os != NULL);
5676 os->set_needs_symtab_index();
5684 case elfcpp::R_POWERPC_GOT_DTPREL16:
5685 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5686 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5687 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5689 Output_data_got_powerpc<size, big_endian>* got
5690 = target->got_section(symtab, layout);
5691 if (!gsym->final_value_is_known()
5692 && (gsym->is_from_dynobj()
5693 || gsym->is_undefined()
5694 || gsym->is_preemptible()))
5695 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
5696 target->rela_dyn_section(layout),
5697 elfcpp::R_POWERPC_DTPREL);
5699 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
5703 case elfcpp::R_POWERPC_GOT_TPREL16:
5704 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5705 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5706 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5708 const bool final = gsym->final_value_is_known();
5709 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5710 if (tls_type == tls::TLSOPT_NONE)
5712 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5714 Output_data_got_powerpc<size, big_endian>* got
5715 = target->got_section(symtab, layout);
5716 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5717 if (gsym->is_undefined()
5718 || gsym->is_from_dynobj())
5720 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5721 elfcpp::R_POWERPC_TPREL);
5725 unsigned int off = got->add_constant(0);
5726 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5727 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5728 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5733 else if (tls_type == tls::TLSOPT_TO_LE)
5735 // no GOT relocs needed for Local Exec.
5743 unsupported_reloc_global(object, r_type, gsym);
5749 case elfcpp::R_POWERPC_GOT_TLSLD16:
5750 case elfcpp::R_POWERPC_GOT_TLSGD16:
5751 case elfcpp::R_POWERPC_GOT_TPREL16:
5752 case elfcpp::R_POWERPC_GOT_DTPREL16:
5753 case elfcpp::R_POWERPC_GOT16:
5754 case elfcpp::R_PPC64_GOT16_DS:
5755 case elfcpp::R_PPC64_TOC16:
5756 case elfcpp::R_PPC64_TOC16_DS:
5757 ppc_object->set_has_small_toc_reloc();
5763 // Process relocations for gc.
5765 template<int size, bool big_endian>
5767 Target_powerpc<size, big_endian>::gc_process_relocs(
5768 Symbol_table* symtab,
5770 Sized_relobj_file<size, big_endian>* object,
5771 unsigned int data_shndx,
5773 const unsigned char* prelocs,
5775 Output_section* output_section,
5776 bool needs_special_offset_handling,
5777 size_t local_symbol_count,
5778 const unsigned char* plocal_symbols)
5780 typedef Target_powerpc<size, big_endian> Powerpc;
5781 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5782 Powerpc_relobj<size, big_endian>* ppc_object
5783 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5785 ppc_object->set_opd_valid();
5786 if (size == 64 && data_shndx == ppc_object->opd_shndx())
5788 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
5789 for (p = ppc_object->access_from_map()->begin();
5790 p != ppc_object->access_from_map()->end();
5793 Address dst_off = p->first;
5794 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5795 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
5796 for (s = p->second.begin(); s != p->second.end(); ++s)
5798 Object* src_obj = s->first;
5799 unsigned int src_indx = s->second;
5800 symtab->gc()->add_reference(src_obj, src_indx,
5801 ppc_object, dst_indx);
5805 ppc_object->access_from_map()->clear();
5806 ppc_object->process_gc_mark(symtab);
5807 // Don't look at .opd relocs as .opd will reference everything.
5811 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
5812 typename Target_powerpc::Relocatable_size_for_reloc>(
5821 needs_special_offset_handling,
5826 // Handle target specific gc actions when adding a gc reference from
5827 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5828 // and DST_OFF. For powerpc64, this adds a referenc to the code
5829 // section of a function descriptor.
5831 template<int size, bool big_endian>
5833 Target_powerpc<size, big_endian>::do_gc_add_reference(
5834 Symbol_table* symtab,
5836 unsigned int src_shndx,
5838 unsigned int dst_shndx,
5839 Address dst_off) const
5841 if (size != 64 || dst_obj->is_dynamic())
5844 Powerpc_relobj<size, big_endian>* ppc_object
5845 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
5846 if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
5848 if (ppc_object->opd_valid())
5850 dst_shndx = ppc_object->get_opd_ent(dst_off);
5851 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
5855 // If we haven't run scan_opd_relocs, we must delay
5856 // processing this function descriptor reference.
5857 ppc_object->add_reference(src_obj, src_shndx, dst_off);
5862 // Add any special sections for this symbol to the gc work list.
5863 // For powerpc64, this adds the code section of a function
5866 template<int size, bool big_endian>
5868 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
5869 Symbol_table* symtab,
5874 Powerpc_relobj<size, big_endian>* ppc_object
5875 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
5877 unsigned int shndx = sym->shndx(&is_ordinary);
5878 if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
5880 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
5881 Address dst_off = gsym->value();
5882 if (ppc_object->opd_valid())
5884 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5885 symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx));
5888 ppc_object->add_gc_mark(dst_off);
5893 // For a symbol location in .opd, set LOC to the location of the
5896 template<int size, bool big_endian>
5898 Target_powerpc<size, big_endian>::do_function_location(
5899 Symbol_location* loc) const
5901 if (size == 64 && loc->shndx != 0)
5903 if (loc->object->is_dynamic())
5905 Powerpc_dynobj<size, big_endian>* ppc_object
5906 = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
5907 if (loc->shndx == ppc_object->opd_shndx())
5910 Address off = loc->offset - ppc_object->opd_address();
5911 loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
5912 loc->offset = dest_off;
5917 const Powerpc_relobj<size, big_endian>* ppc_object
5918 = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
5919 if (loc->shndx == ppc_object->opd_shndx())
5922 loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
5923 loc->offset = dest_off;
5929 // Scan relocations for a section.
5931 template<int size, bool big_endian>
5933 Target_powerpc<size, big_endian>::scan_relocs(
5934 Symbol_table* symtab,
5936 Sized_relobj_file<size, big_endian>* object,
5937 unsigned int data_shndx,
5938 unsigned int sh_type,
5939 const unsigned char* prelocs,
5941 Output_section* output_section,
5942 bool needs_special_offset_handling,
5943 size_t local_symbol_count,
5944 const unsigned char* plocal_symbols)
5946 typedef Target_powerpc<size, big_endian> Powerpc;
5947 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5949 if (sh_type == elfcpp::SHT_REL)
5951 gold_error(_("%s: unsupported REL reloc section"),
5952 object->name().c_str());
5956 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
5965 needs_special_offset_handling,
5970 // Functor class for processing the global symbol table.
5971 // Removes symbols defined on discarded opd entries.
5973 template<bool big_endian>
5974 class Global_symbol_visitor_opd
5977 Global_symbol_visitor_opd()
5981 operator()(Sized_symbol<64>* sym)
5983 if (sym->has_symtab_index()
5984 || sym->source() != Symbol::FROM_OBJECT
5985 || !sym->in_real_elf())
5988 if (sym->object()->is_dynamic())
5991 Powerpc_relobj<64, big_endian>* symobj
5992 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
5993 if (symobj->opd_shndx() == 0)
5997 unsigned int shndx = sym->shndx(&is_ordinary);
5998 if (shndx == symobj->opd_shndx()
5999 && symobj->get_opd_discard(sym->value()))
6000 sym->set_symtab_index(-1U);
6004 template<int size, bool big_endian>
6006 Target_powerpc<size, big_endian>::define_save_restore_funcs(
6008 Symbol_table* symtab)
6012 Output_data_save_res<64, big_endian>* savres
6013 = new Output_data_save_res<64, big_endian>(symtab);
6014 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
6015 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
6016 savres, ORDER_TEXT, false);
6020 // Sort linker created .got section first (for the header), then input
6021 // sections belonging to files using small model code.
6023 template<bool big_endian>
6024 class Sort_toc_sections
6028 operator()(const Output_section::Input_section& is1,
6029 const Output_section::Input_section& is2) const
6031 if (!is1.is_input_section() && is2.is_input_section())
6034 = (is1.is_input_section()
6035 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
6036 ->has_small_toc_reloc()));
6038 = (is2.is_input_section()
6039 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
6040 ->has_small_toc_reloc()));
6041 return small1 && !small2;
6045 // Finalize the sections.
6047 template<int size, bool big_endian>
6049 Target_powerpc<size, big_endian>::do_finalize_sections(
6051 const Input_objects*,
6052 Symbol_table* symtab)
6054 if (parameters->doing_static_link())
6056 // At least some versions of glibc elf-init.o have a strong
6057 // reference to __rela_iplt marker syms. A weak ref would be
6059 if (this->iplt_ != NULL)
6061 Reloc_section* rel = this->iplt_->rel_plt();
6062 symtab->define_in_output_data("__rela_iplt_start", NULL,
6063 Symbol_table::PREDEFINED, rel, 0, 0,
6064 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6065 elfcpp::STV_HIDDEN, 0, false, true);
6066 symtab->define_in_output_data("__rela_iplt_end", NULL,
6067 Symbol_table::PREDEFINED, rel, 0, 0,
6068 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6069 elfcpp::STV_HIDDEN, 0, true, true);
6073 symtab->define_as_constant("__rela_iplt_start", NULL,
6074 Symbol_table::PREDEFINED, 0, 0,
6075 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6076 elfcpp::STV_HIDDEN, 0, true, false);
6077 symtab->define_as_constant("__rela_iplt_end", NULL,
6078 Symbol_table::PREDEFINED, 0, 0,
6079 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
6080 elfcpp::STV_HIDDEN, 0, true, false);
6086 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
6087 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
6089 if (!parameters->options().relocatable())
6091 this->define_save_restore_funcs(layout, symtab);
6093 // Annoyingly, we need to make these sections now whether or
6094 // not we need them. If we delay until do_relax then we
6095 // need to mess with the relaxation machinery checkpointing.
6096 this->got_section(symtab, layout);
6097 this->make_brlt_section(layout);
6099 if (parameters->options().toc_sort())
6101 Output_section* os = this->got_->output_section();
6102 if (os != NULL && os->input_sections().size() > 1)
6103 std::stable_sort(os->input_sections().begin(),
6104 os->input_sections().end(),
6105 Sort_toc_sections<big_endian>());
6110 // Fill in some more dynamic tags.
6111 Output_data_dynamic* odyn = layout->dynamic_data();
6114 const Reloc_section* rel_plt = (this->plt_ == NULL
6116 : this->plt_->rel_plt());
6117 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
6118 this->rela_dyn_, true, size == 32);
6122 if (this->got_ != NULL)
6124 this->got_->finalize_data_size();
6125 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
6126 this->got_, this->got_->g_o_t());
6131 if (this->glink_ != NULL)
6133 this->glink_->finalize_data_size();
6134 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
6136 (this->glink_->pltresolve_size
6142 // Emit any relocs we saved in an attempt to avoid generating COPY
6144 if (this->copy_relocs_.any_saved_relocs())
6145 this->copy_relocs_.emit(this->rela_dyn_section(layout));
6148 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6152 ok_lo_toc_insn(uint32_t insn)
6154 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6155 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6156 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6157 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6158 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6159 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6160 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6161 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6162 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6163 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6164 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6165 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6166 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6167 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6168 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6170 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6171 && ((insn & 3) == 0 || (insn & 3) == 3))
6172 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
6175 // Return the value to use for a branch relocation.
6177 template<int size, bool big_endian>
6178 typename Target_powerpc<size, big_endian>::Address
6179 Target_powerpc<size, big_endian>::symval_for_branch(
6180 const Symbol_table* symtab,
6182 const Sized_symbol<size>* gsym,
6183 Powerpc_relobj<size, big_endian>* object,
6184 unsigned int *dest_shndx)
6190 // If the symbol is defined in an opd section, ie. is a function
6191 // descriptor, use the function descriptor code entry address
6192 Powerpc_relobj<size, big_endian>* symobj = object;
6194 && gsym->source() != Symbol::FROM_OBJECT)
6197 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
6198 unsigned int shndx = symobj->opd_shndx();
6201 Address opd_addr = symobj->get_output_section_offset(shndx);
6202 if (opd_addr == invalid_address)
6204 opd_addr += symobj->output_section_address(shndx);
6205 if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx))
6208 *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off);
6209 if (symtab->is_section_folded(symobj, *dest_shndx))
6212 = symtab->icf()->get_folded_section(symobj, *dest_shndx);
6213 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
6214 *dest_shndx = folded.second;
6216 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
6217 gold_assert(sec_addr != invalid_address);
6218 sec_addr += symobj->output_section(*dest_shndx)->address();
6219 value = sec_addr + sec_off;
6224 // Perform a relocation.
6226 template<int size, bool big_endian>
6228 Target_powerpc<size, big_endian>::Relocate::relocate(
6229 const Relocate_info<size, big_endian>* relinfo,
6230 Target_powerpc* target,
6233 const elfcpp::Rela<size, big_endian>& rela,
6234 unsigned int r_type,
6235 const Sized_symbol<size>* gsym,
6236 const Symbol_value<size>* psymval,
6237 unsigned char* view,
6239 section_size_type view_size)
6244 switch (this->maybe_skip_tls_get_addr_call(r_type, gsym))
6246 case Track_tls::NOT_EXPECTED:
6247 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6248 _("__tls_get_addr call lacks marker reloc"));
6250 case Track_tls::EXPECTED:
6251 // We have already complained.
6253 case Track_tls::SKIP:
6255 case Track_tls::NORMAL:
6259 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
6260 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
6261 Powerpc_relobj<size, big_endian>* const object
6262 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
6264 bool has_plt_value = false;
6265 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6267 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type))
6268 : object->local_has_plt_offset(r_sym))
6269 && (!psymval->is_ifunc_symbol()
6270 || Scan::reloc_needs_plt_for_ifunc(object, r_type, false)))
6272 Stub_table<size, big_endian>* stub_table
6273 = object->stub_table(relinfo->data_shndx);
6274 if (stub_table == NULL)
6276 // This is a ref from a data section to an ifunc symbol.
6277 if (target->stub_tables().size() != 0)
6278 stub_table = target->stub_tables()[0];
6280 gold_assert(stub_table != NULL);
6283 off = stub_table->find_plt_call_entry(object, gsym, r_type,
6284 rela.get_r_addend());
6286 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
6287 rela.get_r_addend());
6288 gold_assert(off != invalid_address);
6289 value = stub_table->stub_address() + off;
6290 has_plt_value = true;
6293 if (r_type == elfcpp::R_POWERPC_GOT16
6294 || r_type == elfcpp::R_POWERPC_GOT16_LO
6295 || r_type == elfcpp::R_POWERPC_GOT16_HI
6296 || r_type == elfcpp::R_POWERPC_GOT16_HA
6297 || r_type == elfcpp::R_PPC64_GOT16_DS
6298 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
6302 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
6303 value = gsym->got_offset(GOT_TYPE_STANDARD);
6307 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6308 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
6309 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
6311 value -= target->got_section()->got_base_offset(object);
6313 else if (r_type == elfcpp::R_PPC64_TOC)
6315 value = (target->got_section()->output_section()->address()
6316 + object->toc_base_offset());
6318 else if (gsym != NULL
6319 && (r_type == elfcpp::R_POWERPC_REL24
6320 || r_type == elfcpp::R_PPC_PLTREL24)
6325 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
6326 Valtype* wv = reinterpret_cast<Valtype*>(view);
6327 bool can_plt_call = false;
6328 if (rela.get_r_offset() + 8 <= view_size)
6330 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
6331 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
6334 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
6336 elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40);
6337 can_plt_call = true;
6342 // If we don't have a branch and link followed by a nop,
6343 // we can't go via the plt because there is no place to
6344 // put a toc restoring instruction.
6345 // Unless we know we won't be returning.
6346 if (strcmp(gsym->name(), "__libc_start_main") == 0)
6347 can_plt_call = true;
6351 // g++ as of 20130507 emits self-calls without a
6352 // following nop. This is arguably wrong since we have
6353 // conflicting information. On the one hand a global
6354 // symbol and on the other a local call sequence, but
6355 // don't error for this special case.
6356 // It isn't possible to cheaply verify we have exactly
6357 // such a call. Allow all calls to the same section.
6359 Address code = value;
6360 if (gsym->source() == Symbol::FROM_OBJECT
6361 && gsym->object() == object)
6363 Address addend = rela.get_r_addend();
6364 unsigned int dest_shndx;
6365 Address opdent = psymval->value(object, addend);
6366 code = target->symval_for_branch(relinfo->symtab, opdent,
6367 gsym, object, &dest_shndx);
6369 if (dest_shndx == 0)
6370 dest_shndx = gsym->shndx(&is_ordinary);
6371 ok = dest_shndx == relinfo->data_shndx;
6375 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6376 _("call lacks nop, can't restore toc; "
6377 "recompile with -fPIC"));
6383 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6384 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
6385 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
6386 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
6388 // First instruction of a global dynamic sequence, arg setup insn.
6389 const bool final = gsym == NULL || gsym->final_value_is_known();
6390 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6391 enum Got_type got_type = GOT_TYPE_STANDARD;
6392 if (tls_type == tls::TLSOPT_NONE)
6393 got_type = GOT_TYPE_TLSGD;
6394 else if (tls_type == tls::TLSOPT_TO_IE)
6395 got_type = GOT_TYPE_TPREL;
6396 if (got_type != GOT_TYPE_STANDARD)
6400 gold_assert(gsym->has_got_offset(got_type));
6401 value = gsym->got_offset(got_type);
6405 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6406 gold_assert(object->local_has_got_offset(r_sym, got_type));
6407 value = object->local_got_offset(r_sym, got_type);
6409 value -= target->got_section()->got_base_offset(object);
6411 if (tls_type == tls::TLSOPT_TO_IE)
6413 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6414 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
6416 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6417 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6418 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
6420 insn |= 32 << 26; // lwz
6422 insn |= 58 << 26; // ld
6423 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6425 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
6426 - elfcpp::R_POWERPC_GOT_TLSGD16);
6428 else if (tls_type == tls::TLSOPT_TO_LE)
6430 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6431 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
6433 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6434 Insn insn = addis_3_13;
6437 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6438 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6439 value = psymval->value(object, rela.get_r_addend());
6443 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6445 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6446 r_type = elfcpp::R_POWERPC_NONE;
6450 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6451 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
6452 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
6453 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
6455 // First instruction of a local dynamic sequence, arg setup insn.
6456 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6457 if (tls_type == tls::TLSOPT_NONE)
6459 value = target->tlsld_got_offset();
6460 value -= target->got_section()->got_base_offset(object);
6464 gold_assert(tls_type == tls::TLSOPT_TO_LE);
6465 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6466 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
6468 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6469 Insn insn = addis_3_13;
6472 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6473 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6478 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6480 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6481 r_type = elfcpp::R_POWERPC_NONE;
6485 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
6486 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
6487 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
6488 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
6490 // Accesses relative to a local dynamic sequence address,
6491 // no optimisation here.
6494 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
6495 value = gsym->got_offset(GOT_TYPE_DTPREL);
6499 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6500 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
6501 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
6503 value -= target->got_section()->got_base_offset(object);
6505 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6506 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
6507 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
6508 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
6510 // First instruction of initial exec sequence.
6511 const bool final = gsym == NULL || gsym->final_value_is_known();
6512 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6513 if (tls_type == tls::TLSOPT_NONE)
6517 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
6518 value = gsym->got_offset(GOT_TYPE_TPREL);
6522 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
6523 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
6524 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
6526 value -= target->got_section()->got_base_offset(object);
6530 gold_assert(tls_type == tls::TLSOPT_TO_LE);
6531 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6532 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
6534 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6535 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6536 insn &= (1 << 26) - (1 << 21); // extract rt from ld
6541 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6542 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6543 value = psymval->value(object, rela.get_r_addend());
6547 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6549 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6550 r_type = elfcpp::R_POWERPC_NONE;
6554 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
6555 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
6557 // Second instruction of a global dynamic sequence,
6558 // the __tls_get_addr call
6559 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
6560 const bool final = gsym == NULL || gsym->final_value_is_known();
6561 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6562 if (tls_type != tls::TLSOPT_NONE)
6564 if (tls_type == tls::TLSOPT_TO_IE)
6566 Insn* iview = reinterpret_cast<Insn*>(view);
6567 Insn insn = add_3_3_13;
6570 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6571 r_type = elfcpp::R_POWERPC_NONE;
6575 Insn* iview = reinterpret_cast<Insn*>(view);
6576 Insn insn = addi_3_3;
6577 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6578 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6579 view += 2 * big_endian;
6580 value = psymval->value(object, rela.get_r_addend());
6582 this->skip_next_tls_get_addr_call();
6585 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
6586 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
6588 // Second instruction of a local dynamic sequence,
6589 // the __tls_get_addr call
6590 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
6591 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6592 if (tls_type == tls::TLSOPT_TO_LE)
6594 Insn* iview = reinterpret_cast<Insn*>(view);
6595 Insn insn = addi_3_3;
6596 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6597 this->skip_next_tls_get_addr_call();
6598 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6599 view += 2 * big_endian;
6603 else if (r_type == elfcpp::R_POWERPC_TLS)
6605 // Second instruction of an initial exec sequence
6606 const bool final = gsym == NULL || gsym->final_value_is_known();
6607 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6608 if (tls_type == tls::TLSOPT_TO_LE)
6610 Insn* iview = reinterpret_cast<Insn*>(view);
6611 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6612 unsigned int reg = size == 32 ? 2 : 13;
6613 insn = at_tls_transform(insn, reg);
6614 gold_assert(insn != 0);
6615 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6616 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6617 view += 2 * big_endian;
6618 value = psymval->value(object, rela.get_r_addend());
6621 else if (!has_plt_value)
6624 unsigned int dest_shndx;
6625 if (r_type != elfcpp::R_PPC_PLTREL24)
6626 addend = rela.get_r_addend();
6627 value = psymval->value(object, addend);
6628 if (size == 64 && is_branch_reloc(r_type))
6629 value = target->symval_for_branch(relinfo->symtab, value,
6630 gsym, object, &dest_shndx);
6631 unsigned int max_branch_offset = 0;
6632 if (r_type == elfcpp::R_POWERPC_REL24
6633 || r_type == elfcpp::R_PPC_PLTREL24
6634 || r_type == elfcpp::R_PPC_LOCAL24PC)
6635 max_branch_offset = 1 << 25;
6636 else if (r_type == elfcpp::R_POWERPC_REL14
6637 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
6638 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
6639 max_branch_offset = 1 << 15;
6640 if (max_branch_offset != 0
6641 && value - address + max_branch_offset >= 2 * max_branch_offset)
6643 Stub_table<size, big_endian>* stub_table
6644 = object->stub_table(relinfo->data_shndx);
6645 if (stub_table != NULL)
6647 Address off = stub_table->find_long_branch_entry(object, value);
6648 if (off != invalid_address)
6649 value = (stub_table->stub_address() + stub_table->plt_size()
6657 case elfcpp::R_PPC64_REL64:
6658 case elfcpp::R_POWERPC_REL32:
6659 case elfcpp::R_POWERPC_REL24:
6660 case elfcpp::R_PPC_PLTREL24:
6661 case elfcpp::R_PPC_LOCAL24PC:
6662 case elfcpp::R_POWERPC_REL16:
6663 case elfcpp::R_POWERPC_REL16_LO:
6664 case elfcpp::R_POWERPC_REL16_HI:
6665 case elfcpp::R_POWERPC_REL16_HA:
6666 case elfcpp::R_POWERPC_REL14:
6667 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6668 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6672 case elfcpp::R_PPC64_TOC16:
6673 case elfcpp::R_PPC64_TOC16_LO:
6674 case elfcpp::R_PPC64_TOC16_HI:
6675 case elfcpp::R_PPC64_TOC16_HA:
6676 case elfcpp::R_PPC64_TOC16_DS:
6677 case elfcpp::R_PPC64_TOC16_LO_DS:
6678 // Subtract the TOC base address.
6679 value -= (target->got_section()->output_section()->address()
6680 + object->toc_base_offset());
6683 case elfcpp::R_POWERPC_SECTOFF:
6684 case elfcpp::R_POWERPC_SECTOFF_LO:
6685 case elfcpp::R_POWERPC_SECTOFF_HI:
6686 case elfcpp::R_POWERPC_SECTOFF_HA:
6687 case elfcpp::R_PPC64_SECTOFF_DS:
6688 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6690 value -= os->address();
6693 case elfcpp::R_PPC64_TPREL16_DS:
6694 case elfcpp::R_PPC64_TPREL16_LO_DS:
6696 // R_PPC_TLSGD and R_PPC_TLSLD
6698 case elfcpp::R_POWERPC_TPREL16:
6699 case elfcpp::R_POWERPC_TPREL16_LO:
6700 case elfcpp::R_POWERPC_TPREL16_HI:
6701 case elfcpp::R_POWERPC_TPREL16_HA:
6702 case elfcpp::R_POWERPC_TPREL:
6703 case elfcpp::R_PPC64_TPREL16_HIGHER:
6704 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6705 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6706 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6707 // tls symbol values are relative to tls_segment()->vaddr()
6711 case elfcpp::R_PPC64_DTPREL16_DS:
6712 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6713 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6714 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6715 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6716 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6718 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6719 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6721 case elfcpp::R_POWERPC_DTPREL16:
6722 case elfcpp::R_POWERPC_DTPREL16_LO:
6723 case elfcpp::R_POWERPC_DTPREL16_HI:
6724 case elfcpp::R_POWERPC_DTPREL16_HA:
6725 case elfcpp::R_POWERPC_DTPREL:
6726 // tls symbol values are relative to tls_segment()->vaddr()
6727 value -= dtp_offset;
6734 Insn branch_bit = 0;
6737 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6738 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6739 branch_bit = 1 << 21;
6740 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6741 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6743 Insn* iview = reinterpret_cast<Insn*>(view);
6744 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6747 if (this->is_isa_v2)
6749 // Set 'a' bit. This is 0b00010 in BO field for branch
6750 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6751 // for branch on CTR insns (BO == 1a00t or 1a01t).
6752 if ((insn & (0x14 << 21)) == (0x04 << 21))
6754 else if ((insn & (0x14 << 21)) == (0x10 << 21))
6761 // Invert 'y' bit if not the default.
6762 if (static_cast<Signed_address>(value) < 0)
6765 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6775 // Multi-instruction sequences that access the TOC can be
6776 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6777 // to nop; addi rb,r2,x;
6783 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6784 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6785 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6786 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6787 case elfcpp::R_POWERPC_GOT16_HA:
6788 case elfcpp::R_PPC64_TOC16_HA:
6789 if (parameters->options().toc_optimize())
6791 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6792 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6793 if ((insn & ((0x3f << 26) | 0x1f << 16))
6794 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6795 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6796 _("toc optimization is not supported "
6797 "for %#08x instruction"), insn);
6798 else if (value + 0x8000 < 0x10000)
6800 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
6806 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6807 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6808 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6809 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6810 case elfcpp::R_POWERPC_GOT16_LO:
6811 case elfcpp::R_PPC64_GOT16_LO_DS:
6812 case elfcpp::R_PPC64_TOC16_LO:
6813 case elfcpp::R_PPC64_TOC16_LO_DS:
6814 if (parameters->options().toc_optimize())
6816 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6817 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6818 if (!ok_lo_toc_insn(insn))
6819 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6820 _("toc optimization is not supported "
6821 "for %#08x instruction"), insn);
6822 else if (value + 0x8000 < 0x10000)
6824 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
6826 // Transform addic to addi when we change reg.
6827 insn &= ~((0x3f << 26) | (0x1f << 16));
6828 insn |= (14u << 26) | (2 << 16);
6832 insn &= ~(0x1f << 16);
6835 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6842 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
6845 case elfcpp::R_POWERPC_ADDR32:
6846 case elfcpp::R_POWERPC_UADDR32:
6848 overflow = Reloc::CHECK_BITFIELD;
6851 case elfcpp::R_POWERPC_REL32:
6853 overflow = Reloc::CHECK_SIGNED;
6856 case elfcpp::R_POWERPC_ADDR24:
6857 case elfcpp::R_POWERPC_ADDR16:
6858 case elfcpp::R_POWERPC_UADDR16:
6859 case elfcpp::R_PPC64_ADDR16_DS:
6860 case elfcpp::R_POWERPC_ADDR14:
6861 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6862 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6863 overflow = Reloc::CHECK_BITFIELD;
6866 case elfcpp::R_POWERPC_REL24:
6867 case elfcpp::R_PPC_PLTREL24:
6868 case elfcpp::R_PPC_LOCAL24PC:
6869 case elfcpp::R_POWERPC_REL16:
6870 case elfcpp::R_PPC64_TOC16:
6871 case elfcpp::R_POWERPC_GOT16:
6872 case elfcpp::R_POWERPC_SECTOFF:
6873 case elfcpp::R_POWERPC_TPREL16:
6874 case elfcpp::R_POWERPC_DTPREL16:
6875 case elfcpp::R_PPC64_TPREL16_DS:
6876 case elfcpp::R_PPC64_DTPREL16_DS:
6877 case elfcpp::R_PPC64_TOC16_DS:
6878 case elfcpp::R_PPC64_GOT16_DS:
6879 case elfcpp::R_PPC64_SECTOFF_DS:
6880 case elfcpp::R_POWERPC_REL14:
6881 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6882 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6883 case elfcpp::R_POWERPC_GOT_TLSGD16:
6884 case elfcpp::R_POWERPC_GOT_TLSLD16:
6885 case elfcpp::R_POWERPC_GOT_TPREL16:
6886 case elfcpp::R_POWERPC_GOT_DTPREL16:
6887 overflow = Reloc::CHECK_SIGNED;
6891 typename Powerpc_relocate_functions<size, big_endian>::Status status
6892 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
6895 case elfcpp::R_POWERPC_NONE:
6896 case elfcpp::R_POWERPC_TLS:
6897 case elfcpp::R_POWERPC_GNU_VTINHERIT:
6898 case elfcpp::R_POWERPC_GNU_VTENTRY:
6899 case elfcpp::R_PPC_EMB_MRKREF:
6902 case elfcpp::R_PPC64_ADDR64:
6903 case elfcpp::R_PPC64_REL64:
6904 case elfcpp::R_PPC64_TOC:
6905 Reloc::addr64(view, value);
6908 case elfcpp::R_POWERPC_TPREL:
6909 case elfcpp::R_POWERPC_DTPREL:
6911 Reloc::addr64(view, value);
6913 status = Reloc::addr32(view, value, overflow);
6916 case elfcpp::R_PPC64_UADDR64:
6917 Reloc::addr64_u(view, value);
6920 case elfcpp::R_POWERPC_ADDR32:
6921 status = Reloc::addr32(view, value, overflow);
6924 case elfcpp::R_POWERPC_REL32:
6925 case elfcpp::R_POWERPC_UADDR32:
6926 status = Reloc::addr32_u(view, value, overflow);
6929 case elfcpp::R_POWERPC_ADDR24:
6930 case elfcpp::R_POWERPC_REL24:
6931 case elfcpp::R_PPC_PLTREL24:
6932 case elfcpp::R_PPC_LOCAL24PC:
6933 status = Reloc::addr24(view, value, overflow);
6936 case elfcpp::R_POWERPC_GOT_DTPREL16:
6937 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6940 status = Reloc::addr16_ds(view, value, overflow);
6943 case elfcpp::R_POWERPC_ADDR16:
6944 case elfcpp::R_POWERPC_REL16:
6945 case elfcpp::R_PPC64_TOC16:
6946 case elfcpp::R_POWERPC_GOT16:
6947 case elfcpp::R_POWERPC_SECTOFF:
6948 case elfcpp::R_POWERPC_TPREL16:
6949 case elfcpp::R_POWERPC_DTPREL16:
6950 case elfcpp::R_POWERPC_GOT_TLSGD16:
6951 case elfcpp::R_POWERPC_GOT_TLSLD16:
6952 case elfcpp::R_POWERPC_GOT_TPREL16:
6953 case elfcpp::R_POWERPC_ADDR16_LO:
6954 case elfcpp::R_POWERPC_REL16_LO:
6955 case elfcpp::R_PPC64_TOC16_LO:
6956 case elfcpp::R_POWERPC_GOT16_LO:
6957 case elfcpp::R_POWERPC_SECTOFF_LO:
6958 case elfcpp::R_POWERPC_TPREL16_LO:
6959 case elfcpp::R_POWERPC_DTPREL16_LO:
6960 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6961 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6962 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6963 status = Reloc::addr16(view, value, overflow);
6966 case elfcpp::R_POWERPC_UADDR16:
6967 status = Reloc::addr16_u(view, value, overflow);
6970 case elfcpp::R_POWERPC_ADDR16_HI:
6971 case elfcpp::R_POWERPC_REL16_HI:
6972 case elfcpp::R_PPC64_TOC16_HI:
6973 case elfcpp::R_POWERPC_GOT16_HI:
6974 case elfcpp::R_POWERPC_SECTOFF_HI:
6975 case elfcpp::R_POWERPC_TPREL16_HI:
6976 case elfcpp::R_POWERPC_DTPREL16_HI:
6977 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6978 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6979 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6980 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6981 Reloc::addr16_hi(view, value);
6984 case elfcpp::R_POWERPC_ADDR16_HA:
6985 case elfcpp::R_POWERPC_REL16_HA:
6986 case elfcpp::R_PPC64_TOC16_HA:
6987 case elfcpp::R_POWERPC_GOT16_HA:
6988 case elfcpp::R_POWERPC_SECTOFF_HA:
6989 case elfcpp::R_POWERPC_TPREL16_HA:
6990 case elfcpp::R_POWERPC_DTPREL16_HA:
6991 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6992 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6993 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6994 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6995 Reloc::addr16_ha(view, value);
6998 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7000 // R_PPC_EMB_NADDR16_LO
7002 case elfcpp::R_PPC64_ADDR16_HIGHER:
7003 case elfcpp::R_PPC64_TPREL16_HIGHER:
7004 Reloc::addr16_hi2(view, value);
7007 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7009 // R_PPC_EMB_NADDR16_HI
7011 case elfcpp::R_PPC64_ADDR16_HIGHERA:
7012 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7013 Reloc::addr16_ha2(view, value);
7016 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7018 // R_PPC_EMB_NADDR16_HA
7020 case elfcpp::R_PPC64_ADDR16_HIGHEST:
7021 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7022 Reloc::addr16_hi3(view, value);
7025 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7029 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
7030 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7031 Reloc::addr16_ha3(view, value);
7034 case elfcpp::R_PPC64_DTPREL16_DS:
7035 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7037 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7039 case elfcpp::R_PPC64_TPREL16_DS:
7040 case elfcpp::R_PPC64_TPREL16_LO_DS:
7042 // R_PPC_TLSGD, R_PPC_TLSLD
7044 case elfcpp::R_PPC64_ADDR16_DS:
7045 case elfcpp::R_PPC64_ADDR16_LO_DS:
7046 case elfcpp::R_PPC64_TOC16_DS:
7047 case elfcpp::R_PPC64_TOC16_LO_DS:
7048 case elfcpp::R_PPC64_GOT16_DS:
7049 case elfcpp::R_PPC64_GOT16_LO_DS:
7050 case elfcpp::R_PPC64_SECTOFF_DS:
7051 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7052 status = Reloc::addr16_ds(view, value, overflow);
7055 case elfcpp::R_POWERPC_ADDR14:
7056 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7057 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7058 case elfcpp::R_POWERPC_REL14:
7059 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7060 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7061 status = Reloc::addr14(view, value, overflow);
7064 case elfcpp::R_POWERPC_COPY:
7065 case elfcpp::R_POWERPC_GLOB_DAT:
7066 case elfcpp::R_POWERPC_JMP_SLOT:
7067 case elfcpp::R_POWERPC_RELATIVE:
7068 case elfcpp::R_POWERPC_DTPMOD:
7069 case elfcpp::R_PPC64_JMP_IREL:
7070 case elfcpp::R_POWERPC_IRELATIVE:
7071 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7072 _("unexpected reloc %u in object file"),
7076 case elfcpp::R_PPC_EMB_SDA21:
7081 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7085 case elfcpp::R_PPC_EMB_SDA2I16:
7086 case elfcpp::R_PPC_EMB_SDA2REL:
7089 // R_PPC64_TLSGD, R_PPC64_TLSLD
7092 case elfcpp::R_POWERPC_PLT32:
7093 case elfcpp::R_POWERPC_PLTREL32:
7094 case elfcpp::R_POWERPC_PLT16_LO:
7095 case elfcpp::R_POWERPC_PLT16_HI:
7096 case elfcpp::R_POWERPC_PLT16_HA:
7097 case elfcpp::R_PPC_SDAREL16:
7098 case elfcpp::R_POWERPC_ADDR30:
7099 case elfcpp::R_PPC64_PLT64:
7100 case elfcpp::R_PPC64_PLTREL64:
7101 case elfcpp::R_PPC64_PLTGOT16:
7102 case elfcpp::R_PPC64_PLTGOT16_LO:
7103 case elfcpp::R_PPC64_PLTGOT16_HI:
7104 case elfcpp::R_PPC64_PLTGOT16_HA:
7105 case elfcpp::R_PPC64_PLT16_LO_DS:
7106 case elfcpp::R_PPC64_PLTGOT16_DS:
7107 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
7108 case elfcpp::R_PPC_EMB_RELSEC16:
7109 case elfcpp::R_PPC_EMB_RELST_LO:
7110 case elfcpp::R_PPC_EMB_RELST_HI:
7111 case elfcpp::R_PPC_EMB_RELST_HA:
7112 case elfcpp::R_PPC_EMB_BIT_FLD:
7113 case elfcpp::R_PPC_EMB_RELSDA:
7114 case elfcpp::R_PPC_TOC16:
7117 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7118 _("unsupported reloc %u"),
7122 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK)
7123 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
7124 _("relocation overflow"));
7129 // Relocate section data.
7131 template<int size, bool big_endian>
7133 Target_powerpc<size, big_endian>::relocate_section(
7134 const Relocate_info<size, big_endian>* relinfo,
7135 unsigned int sh_type,
7136 const unsigned char* prelocs,
7138 Output_section* output_section,
7139 bool needs_special_offset_handling,
7140 unsigned char* view,
7142 section_size_type view_size,
7143 const Reloc_symbol_changes* reloc_symbol_changes)
7145 typedef Target_powerpc<size, big_endian> Powerpc;
7146 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
7147 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
7148 Powerpc_comdat_behavior;
7150 gold_assert(sh_type == elfcpp::SHT_RELA);
7152 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
7153 Powerpc_relocate, Powerpc_comdat_behavior>(
7159 needs_special_offset_handling,
7163 reloc_symbol_changes);
7166 class Powerpc_scan_relocatable_reloc
7169 // Return the strategy to use for a local symbol which is not a
7170 // section symbol, given the relocation type.
7171 inline Relocatable_relocs::Reloc_strategy
7172 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
7174 if (r_type == 0 && r_sym == 0)
7175 return Relocatable_relocs::RELOC_DISCARD;
7176 return Relocatable_relocs::RELOC_COPY;
7179 // Return the strategy to use for a local symbol which is a section
7180 // symbol, given the relocation type.
7181 inline Relocatable_relocs::Reloc_strategy
7182 local_section_strategy(unsigned int, Relobj*)
7184 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
7187 // Return the strategy to use for a global symbol, given the
7188 // relocation type, the object, and the symbol index.
7189 inline Relocatable_relocs::Reloc_strategy
7190 global_strategy(unsigned int r_type, Relobj*, unsigned int)
7192 if (r_type == elfcpp::R_PPC_PLTREL24)
7193 return Relocatable_relocs::RELOC_SPECIAL;
7194 return Relocatable_relocs::RELOC_COPY;
7198 // Scan the relocs during a relocatable link.
7200 template<int size, bool big_endian>
7202 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
7203 Symbol_table* symtab,
7205 Sized_relobj_file<size, big_endian>* object,
7206 unsigned int data_shndx,
7207 unsigned int sh_type,
7208 const unsigned char* prelocs,
7210 Output_section* output_section,
7211 bool needs_special_offset_handling,
7212 size_t local_symbol_count,
7213 const unsigned char* plocal_symbols,
7214 Relocatable_relocs* rr)
7216 gold_assert(sh_type == elfcpp::SHT_RELA);
7218 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
7219 Powerpc_scan_relocatable_reloc>(
7227 needs_special_offset_handling,
7233 // Emit relocations for a section.
7234 // This is a modified version of the function by the same name in
7235 // target-reloc.h. Using relocate_special_relocatable for
7236 // R_PPC_PLTREL24 would require duplication of the entire body of the
7237 // loop, so we may as well duplicate the whole thing.
7239 template<int size, bool big_endian>
7241 Target_powerpc<size, big_endian>::relocate_relocs(
7242 const Relocate_info<size, big_endian>* relinfo,
7243 unsigned int sh_type,
7244 const unsigned char* prelocs,
7246 Output_section* output_section,
7247 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
7248 const Relocatable_relocs* rr,
7250 Address view_address,
7252 unsigned char* reloc_view,
7253 section_size_type reloc_view_size)
7255 gold_assert(sh_type == elfcpp::SHT_RELA);
7257 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
7259 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
7261 const int reloc_size
7262 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
7264 Powerpc_relobj<size, big_endian>* const object
7265 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
7266 const unsigned int local_count = object->local_symbol_count();
7267 unsigned int got2_shndx = object->got2_shndx();
7268 Address got2_addend = 0;
7269 if (got2_shndx != 0)
7271 got2_addend = object->get_output_section_offset(got2_shndx);
7272 gold_assert(got2_addend != invalid_address);
7275 unsigned char* pwrite = reloc_view;
7276 bool zap_next = false;
7277 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
7279 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
7280 if (strategy == Relocatable_relocs::RELOC_DISCARD)
7283 Reltype reloc(prelocs);
7284 Reltype_write reloc_write(pwrite);
7286 Address offset = reloc.get_r_offset();
7287 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
7288 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
7289 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
7290 const unsigned int orig_r_sym = r_sym;
7291 typename elfcpp::Elf_types<size>::Elf_Swxword addend
7292 = reloc.get_r_addend();
7293 const Symbol* gsym = NULL;
7297 // We could arrange to discard these and other relocs for
7298 // tls optimised sequences in the strategy methods, but for
7299 // now do as BFD ld does.
7300 r_type = elfcpp::R_POWERPC_NONE;
7304 // Get the new symbol index.
7305 if (r_sym < local_count)
7309 case Relocatable_relocs::RELOC_COPY:
7310 case Relocatable_relocs::RELOC_SPECIAL:
7313 r_sym = object->symtab_index(r_sym);
7314 gold_assert(r_sym != -1U);
7318 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
7320 // We are adjusting a section symbol. We need to find
7321 // the symbol table index of the section symbol for
7322 // the output section corresponding to input section
7323 // in which this symbol is defined.
7324 gold_assert(r_sym < local_count);
7326 unsigned int shndx =
7327 object->local_symbol_input_shndx(r_sym, &is_ordinary);
7328 gold_assert(is_ordinary);
7329 Output_section* os = object->output_section(shndx);
7330 gold_assert(os != NULL);
7331 gold_assert(os->needs_symtab_index());
7332 r_sym = os->symtab_index();
7342 gsym = object->global_symbol(r_sym);
7343 gold_assert(gsym != NULL);
7344 if (gsym->is_forwarder())
7345 gsym = relinfo->symtab->resolve_forwards(gsym);
7347 gold_assert(gsym->has_symtab_index());
7348 r_sym = gsym->symtab_index();
7351 // Get the new offset--the location in the output section where
7352 // this relocation should be applied.
7353 if (static_cast<Address>(offset_in_output_section) != invalid_address)
7354 offset += offset_in_output_section;
7357 section_offset_type sot_offset =
7358 convert_types<section_offset_type, Address>(offset);
7359 section_offset_type new_sot_offset =
7360 output_section->output_offset(object, relinfo->data_shndx,
7362 gold_assert(new_sot_offset != -1);
7363 offset = new_sot_offset;
7366 // In an object file, r_offset is an offset within the section.
7367 // In an executable or dynamic object, generated by
7368 // --emit-relocs, r_offset is an absolute address.
7369 if (!parameters->options().relocatable())
7371 offset += view_address;
7372 if (static_cast<Address>(offset_in_output_section) != invalid_address)
7373 offset -= offset_in_output_section;
7376 // Handle the reloc addend based on the strategy.
7377 if (strategy == Relocatable_relocs::RELOC_COPY)
7379 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
7381 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
7382 addend = psymval->value(object, addend);
7384 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
7386 if (addend >= 32768)
7387 addend += got2_addend;
7392 if (!parameters->options().relocatable())
7394 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7395 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
7396 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
7397 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
7399 // First instruction of a global dynamic sequence,
7401 const bool final = gsym == NULL || gsym->final_value_is_known();
7402 switch (this->optimize_tls_gd(final))
7404 case tls::TLSOPT_TO_IE:
7405 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
7406 - elfcpp::R_POWERPC_GOT_TLSGD16);
7408 case tls::TLSOPT_TO_LE:
7409 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
7410 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
7411 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7414 r_type = elfcpp::R_POWERPC_NONE;
7415 offset -= 2 * big_endian;
7422 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7423 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
7424 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
7425 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
7427 // First instruction of a local dynamic sequence,
7429 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
7431 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
7432 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
7434 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7435 const Output_section* os = relinfo->layout->tls_segment()
7437 gold_assert(os != NULL);
7438 gold_assert(os->needs_symtab_index());
7439 r_sym = os->symtab_index();
7440 addend = dtp_offset;
7444 r_type = elfcpp::R_POWERPC_NONE;
7445 offset -= 2 * big_endian;
7449 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7450 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
7451 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
7452 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
7454 // First instruction of initial exec sequence.
7455 const bool final = gsym == NULL || gsym->final_value_is_known();
7456 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
7458 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
7459 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
7460 r_type = elfcpp::R_POWERPC_TPREL16_HA;
7463 r_type = elfcpp::R_POWERPC_NONE;
7464 offset -= 2 * big_endian;
7468 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
7469 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
7471 // Second instruction of a global dynamic sequence,
7472 // the __tls_get_addr call
7473 const bool final = gsym == NULL || gsym->final_value_is_known();
7474 switch (this->optimize_tls_gd(final))
7476 case tls::TLSOPT_TO_IE:
7477 r_type = elfcpp::R_POWERPC_NONE;
7480 case tls::TLSOPT_TO_LE:
7481 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7482 offset += 2 * big_endian;
7489 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
7490 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
7492 // Second instruction of a local dynamic sequence,
7493 // the __tls_get_addr call
7494 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
7496 const Output_section* os = relinfo->layout->tls_segment()
7498 gold_assert(os != NULL);
7499 gold_assert(os->needs_symtab_index());
7500 r_sym = os->symtab_index();
7501 addend = dtp_offset;
7502 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7503 offset += 2 * big_endian;
7507 else if (r_type == elfcpp::R_POWERPC_TLS)
7509 // Second instruction of an initial exec sequence
7510 const bool final = gsym == NULL || gsym->final_value_is_known();
7511 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
7513 r_type = elfcpp::R_POWERPC_TPREL16_LO;
7514 offset += 2 * big_endian;
7519 reloc_write.put_r_offset(offset);
7520 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
7521 reloc_write.put_r_addend(addend);
7523 pwrite += reloc_size;
7526 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
7527 == reloc_view_size);
7530 // Return the value to use for a dynamic symbol which requires special
7531 // treatment. This is how we support equality comparisons of function
7532 // pointers across shared library boundaries, as described in the
7533 // processor specific ABI supplement.
7535 template<int size, bool big_endian>
7537 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
7541 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
7542 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
7543 p != this->stub_tables_.end();
7546 Address off = (*p)->find_plt_call_entry(gsym);
7547 if (off != invalid_address)
7548 return (*p)->stub_address() + off;
7554 // Return the PLT address to use for a local symbol.
7555 template<int size, bool big_endian>
7557 Target_powerpc<size, big_endian>::do_plt_address_for_local(
7558 const Relobj* object,
7559 unsigned int symndx) const
7563 const Sized_relobj<size, big_endian>* relobj
7564 = static_cast<const Sized_relobj<size, big_endian>*>(object);
7565 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
7566 p != this->stub_tables_.end();
7569 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
7571 if (off != invalid_address)
7572 return (*p)->stub_address() + off;
7578 // Return the PLT address to use for a global symbol.
7579 template<int size, bool big_endian>
7581 Target_powerpc<size, big_endian>::do_plt_address_for_global(
7582 const Symbol* gsym) const
7586 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
7587 p != this->stub_tables_.end();
7590 Address off = (*p)->find_plt_call_entry(gsym);
7591 if (off != invalid_address)
7592 return (*p)->stub_address() + off;
7598 // Return the offset to use for the GOT_INDX'th got entry which is
7599 // for a local tls symbol specified by OBJECT, SYMNDX.
7600 template<int size, bool big_endian>
7602 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
7603 const Relobj* object,
7604 unsigned int symndx,
7605 unsigned int got_indx) const
7607 const Powerpc_relobj<size, big_endian>* ppc_object
7608 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
7609 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
7611 for (Got_type got_type = GOT_TYPE_TLSGD;
7612 got_type <= GOT_TYPE_TPREL;
7613 got_type = Got_type(got_type + 1))
7614 if (ppc_object->local_has_got_offset(symndx, got_type))
7616 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
7617 if (got_type == GOT_TYPE_TLSGD)
7619 if (off == got_indx * (size / 8))
7621 if (got_type == GOT_TYPE_TPREL)
7631 // Return the offset to use for the GOT_INDX'th got entry which is
7632 // for global tls symbol GSYM.
7633 template<int size, bool big_endian>
7635 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
7637 unsigned int got_indx) const
7639 if (gsym->type() == elfcpp::STT_TLS)
7641 for (Got_type got_type = GOT_TYPE_TLSGD;
7642 got_type <= GOT_TYPE_TPREL;
7643 got_type = Got_type(got_type + 1))
7644 if (gsym->has_got_offset(got_type))
7646 unsigned int off = gsym->got_offset(got_type);
7647 if (got_type == GOT_TYPE_TLSGD)
7649 if (off == got_indx * (size / 8))
7651 if (got_type == GOT_TYPE_TPREL)
7661 // The selector for powerpc object files.
7663 template<int size, bool big_endian>
7664 class Target_selector_powerpc : public Target_selector
7667 Target_selector_powerpc()
7668 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
7671 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
7672 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
7674 ? (big_endian ? "elf64ppc" : "elf64lppc")
7675 : (big_endian ? "elf32ppc" : "elf32lppc")))
7679 do_instantiate_target()
7680 { return new Target_powerpc<size, big_endian>(); }
7683 Target_selector_powerpc<32, true> target_selector_ppc32;
7684 Target_selector_powerpc<32, false> target_selector_ppc32le;
7685 Target_selector_powerpc<64, true> target_selector_ppc64;
7686 Target_selector_powerpc<64, false> target_selector_ppc64le;
7688 // Instantiate these constants for -O0
7689 template<int size, bool big_endian>
7690 const int Output_data_glink<size, big_endian>::pltresolve_size;
7691 template<int size, bool big_endian>
7692 const typename Stub_table<size, big_endian>::Address
7693 Stub_table<size, big_endian>::invalid_address;
7694 template<int size, bool big_endian>
7695 const typename Target_powerpc<size, big_endian>::Address
7696 Target_powerpc<size, big_endian>::invalid_address;
7698 } // End anonymous namespace.