1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2017 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
65 template<int size
, bool big_endian
>
66 class Output_data_save_res
;
68 template<int size
, bool big_endian
>
71 struct Stub_table_owner
74 : output_section(NULL
), owner(NULL
)
77 Output_section
* output_section
;
78 const Output_section::Input_section
* owner
;
82 is_branch_reloc(unsigned int r_type
);
84 // Counter incremented on every Powerpc_relobj constructed.
85 static uint32_t object_id
= 0;
87 template<int size
, bool big_endian
>
88 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
91 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
92 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
93 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
95 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
96 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
97 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
98 uniq_(object_id
++), special_(0), relatoc_(0), toc_(0),
99 has_small_toc_reloc_(false), opd_valid_(false),
100 e_flags_(ehdr
.get_e_flags()), no_toc_opt_(), opd_ent_(),
101 access_from_map_(), has14_(), stub_table_index_(), st_other_()
103 this->set_abiversion(0);
109 // Read the symbols then set up st_other vector.
111 do_read_symbols(Read_symbols_data
*);
113 // Arrange to always relocate .toc first.
115 do_relocate_sections(
116 const Symbol_table
* symtab
, const Layout
* layout
,
117 const unsigned char* pshdrs
, Output_file
* of
,
118 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
);
120 // The .toc section index.
127 // Mark .toc entry at OFF as not optimizable.
129 set_no_toc_opt(Address off
)
131 if (this->no_toc_opt_
.empty())
132 this->no_toc_opt_
.resize(this->section_size(this->toc_shndx())
135 if (off
< this->no_toc_opt_
.size())
136 this->no_toc_opt_
[off
] = true;
139 // Mark the entire .toc as not optimizable.
143 this->no_toc_opt_
.resize(1);
144 this->no_toc_opt_
[0] = true;
147 // Return true if code using the .toc entry at OFF should not be edited.
149 no_toc_opt(Address off
) const
151 if (this->no_toc_opt_
.empty())
154 if (off
>= this->no_toc_opt_
.size())
156 return this->no_toc_opt_
[off
];
159 // The .got2 section shndx.
164 return this->special_
;
169 // The .opd section shndx.
176 return this->special_
;
179 // Init OPD entry arrays.
181 init_opd(size_t opd_size
)
183 size_t count
= this->opd_ent_ndx(opd_size
);
184 this->opd_ent_
.resize(count
);
187 // Return section and offset of function entry for .opd + R_OFF.
189 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
191 size_t ndx
= this->opd_ent_ndx(r_off
);
192 gold_assert(ndx
< this->opd_ent_
.size());
193 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
195 *value
= this->opd_ent_
[ndx
].off
;
196 return this->opd_ent_
[ndx
].shndx
;
199 // Set section and offset of function entry for .opd + R_OFF.
201 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
203 size_t ndx
= this->opd_ent_ndx(r_off
);
204 gold_assert(ndx
< this->opd_ent_
.size());
205 this->opd_ent_
[ndx
].shndx
= shndx
;
206 this->opd_ent_
[ndx
].off
= value
;
209 // Return discard flag for .opd + R_OFF.
211 get_opd_discard(Address r_off
) const
213 size_t ndx
= this->opd_ent_ndx(r_off
);
214 gold_assert(ndx
< this->opd_ent_
.size());
215 return this->opd_ent_
[ndx
].discard
;
218 // Set discard flag for .opd + R_OFF.
220 set_opd_discard(Address r_off
)
222 size_t ndx
= this->opd_ent_ndx(r_off
);
223 gold_assert(ndx
< this->opd_ent_
.size());
224 this->opd_ent_
[ndx
].discard
= true;
229 { return this->opd_valid_
; }
233 { this->opd_valid_
= true; }
235 // Examine .rela.opd to build info about function entry points.
237 scan_opd_relocs(size_t reloc_count
,
238 const unsigned char* prelocs
,
239 const unsigned char* plocal_syms
);
241 // Returns true if a code sequence loading a TOC entry can be
242 // converted into code calculating a TOC pointer relative offset.
244 make_toc_relative(Target_powerpc
<size
, big_endian
>* target
,
247 // Perform the Sized_relobj_file method, then set up opd info from
250 do_read_relocs(Read_relocs_data
*);
253 do_find_special_sections(Read_symbols_data
* sd
);
255 // Adjust this local symbol value. Return false if the symbol
256 // should be discarded from the output file.
258 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
260 if (size
== 64 && this->opd_shndx() != 0)
263 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
265 if (this->get_opd_discard(lv
->input_value()))
273 { return &this->access_from_map_
; }
275 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
276 // section at DST_OFF.
278 add_reference(Relobj
* src_obj
,
279 unsigned int src_indx
,
280 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
282 Section_id
src_id(src_obj
, src_indx
);
283 this->access_from_map_
[dst_off
].insert(src_id
);
286 // Add a reference to the code section specified by the .opd entry
289 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
291 size_t ndx
= this->opd_ent_ndx(dst_off
);
292 if (ndx
>= this->opd_ent_
.size())
293 this->opd_ent_
.resize(ndx
+ 1);
294 this->opd_ent_
[ndx
].gc_mark
= true;
298 process_gc_mark(Symbol_table
* symtab
)
300 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
301 if (this->opd_ent_
[i
].gc_mark
)
303 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
304 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
308 // Return offset in output GOT section that this object will use
309 // as a TOC pointer. Won't be just a constant with multi-toc support.
311 toc_base_offset() const
315 set_has_small_toc_reloc()
316 { has_small_toc_reloc_
= true; }
319 has_small_toc_reloc() const
320 { return has_small_toc_reloc_
; }
323 set_has_14bit_branch(unsigned int shndx
)
325 if (shndx
>= this->has14_
.size())
326 this->has14_
.resize(shndx
+ 1);
327 this->has14_
[shndx
] = true;
331 has_14bit_branch(unsigned int shndx
) const
332 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
335 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
337 if (shndx
>= this->stub_table_index_
.size())
338 this->stub_table_index_
.resize(shndx
+ 1, -1);
339 this->stub_table_index_
[shndx
] = stub_index
;
342 Stub_table
<size
, big_endian
>*
343 stub_table(unsigned int shndx
)
345 if (shndx
< this->stub_table_index_
.size())
347 Target_powerpc
<size
, big_endian
>* target
348 = static_cast<Target_powerpc
<size
, big_endian
>*>(
349 parameters
->sized_target
<size
, big_endian
>());
350 unsigned int indx
= this->stub_table_index_
[shndx
];
351 if (indx
< target
->stub_tables().size())
352 return target
->stub_tables()[indx
];
360 this->stub_table_index_
.clear();
365 { return this->uniq_
; }
369 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
371 // Set ABI version for input and output
373 set_abiversion(int ver
);
376 st_other (unsigned int symndx
) const
378 return this->st_other_
[symndx
];
382 ppc64_local_entry_offset(const Symbol
* sym
) const
383 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
386 ppc64_local_entry_offset(unsigned int symndx
) const
387 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
398 // Return index into opd_ent_ array for .opd entry at OFF.
399 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
400 // apart when the language doesn't use the last 8-byte word, the
401 // environment pointer. Thus dividing the entry section offset by
402 // 16 will give an index into opd_ent_ that works for either layout
403 // of .opd. (It leaves some elements of the vector unused when .opd
404 // entries are spaced 24 bytes apart, but we don't know the spacing
405 // until relocations are processed, and in any case it is possible
406 // for an object to have some entries spaced 16 bytes apart and
407 // others 24 bytes apart.)
409 opd_ent_ndx(size_t off
) const
412 // Per object unique identifier
415 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
416 unsigned int special_
;
418 // For 64-bit the .rela.toc and .toc section shdnx.
419 unsigned int relatoc_
;
422 // For 64-bit, whether this object uses small model relocs to access
424 bool has_small_toc_reloc_
;
426 // Set at the start of gc_process_relocs, when we know opd_ent_
427 // vector is valid. The flag could be made atomic and set in
428 // do_read_relocs with memory_order_release and then tested with
429 // memory_order_acquire, potentially resulting in fewer entries in
434 elfcpp::Elf_Word e_flags_
;
436 // For 64-bit, an array with one entry per 64-bit word in the .toc
437 // section, set if accesses using that word cannot be optimised.
438 std::vector
<bool> no_toc_opt_
;
440 // The first 8-byte word of an OPD entry gives the address of the
441 // entry point of the function. Relocatable object files have a
442 // relocation on this word. The following vector records the
443 // section and offset specified by these relocations.
444 std::vector
<Opd_ent
> opd_ent_
;
446 // References made to this object's .opd section when running
447 // gc_process_relocs for another object, before the opd_ent_ vector
448 // is valid for this object.
449 Access_from access_from_map_
;
451 // Whether input section has a 14-bit branch reloc.
452 std::vector
<bool> has14_
;
454 // The stub table to use for a given input section.
455 std::vector
<unsigned int> stub_table_index_
;
457 // ELF st_other field for local symbols.
458 std::vector
<unsigned char> st_other_
;
461 template<int size
, bool big_endian
>
462 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
465 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
467 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
468 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
469 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
470 opd_shndx_(0), e_flags_(ehdr
.get_e_flags()), opd_ent_()
472 this->set_abiversion(0);
478 // Call Sized_dynobj::do_read_symbols to read the symbols then
479 // read .opd from a dynamic object, filling in opd_ent_ vector,
481 do_read_symbols(Read_symbols_data
*);
483 // The .opd section shndx.
487 return this->opd_shndx_
;
490 // The .opd section address.
494 return this->opd_address_
;
497 // Init OPD entry arrays.
499 init_opd(size_t opd_size
)
501 size_t count
= this->opd_ent_ndx(opd_size
);
502 this->opd_ent_
.resize(count
);
505 // Return section and offset of function entry for .opd + R_OFF.
507 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
509 size_t ndx
= this->opd_ent_ndx(r_off
);
510 gold_assert(ndx
< this->opd_ent_
.size());
511 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
513 *value
= this->opd_ent_
[ndx
].off
;
514 return this->opd_ent_
[ndx
].shndx
;
517 // Set section and offset of function entry for .opd + R_OFF.
519 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
521 size_t ndx
= this->opd_ent_ndx(r_off
);
522 gold_assert(ndx
< this->opd_ent_
.size());
523 this->opd_ent_
[ndx
].shndx
= shndx
;
524 this->opd_ent_
[ndx
].off
= value
;
529 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
531 // Set ABI version for input and output.
533 set_abiversion(int ver
);
536 // Used to specify extent of executable sections.
539 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
540 : start(start_
), len(len_
), shndx(shndx_
)
544 operator<(const Sec_info
& that
) const
545 { return this->start
< that
.start
; }
558 // Return index into opd_ent_ array for .opd entry at OFF.
560 opd_ent_ndx(size_t off
) const
563 // For 64-bit the .opd section shndx and address.
564 unsigned int opd_shndx_
;
565 Address opd_address_
;
568 elfcpp::Elf_Word e_flags_
;
570 // The first 8-byte word of an OPD entry gives the address of the
571 // entry point of the function. Records the section and offset
572 // corresponding to the address. Note that in dynamic objects,
573 // offset is *not* relative to the section.
574 std::vector
<Opd_ent
> opd_ent_
;
577 // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
578 // base class will emit.
580 template<int sh_type
, int size
, bool big_endian
>
581 class Powerpc_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
584 Powerpc_copy_relocs()
585 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_POWERPC_COPY
)
588 // Emit any saved relocations which turn out to be needed. This is
589 // called after all the relocs have been scanned.
591 emit(Output_data_reloc
<sh_type
, true, size
, big_endian
>*);
594 template<int size
, bool big_endian
>
595 class Target_powerpc
: public Sized_target
<size
, big_endian
>
599 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
600 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
601 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
602 typedef Unordered_set
<Symbol_location
, Symbol_location_hash
> Tocsave_loc
;
603 static const Address invalid_address
= static_cast<Address
>(0) - 1;
604 // Offset of tp and dtp pointers from start of TLS block.
605 static const Address tp_offset
= 0x7000;
606 static const Address dtp_offset
= 0x8000;
609 : Sized_target
<size
, big_endian
>(&powerpc_info
),
610 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
611 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(),
612 tlsld_got_offset_(-1U),
613 stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(),
614 plt_thread_safe_(false), plt_localentry0_(false),
615 plt_localentry0_init_(false), has_localentry0_(false),
616 relax_failed_(false), relax_fail_count_(0),
617 stub_group_size_(0), savres_section_(0)
621 // Process the relocations to determine unreferenced sections for
622 // garbage collection.
624 gc_process_relocs(Symbol_table
* symtab
,
626 Sized_relobj_file
<size
, big_endian
>* object
,
627 unsigned int data_shndx
,
628 unsigned int sh_type
,
629 const unsigned char* prelocs
,
631 Output_section
* output_section
,
632 bool needs_special_offset_handling
,
633 size_t local_symbol_count
,
634 const unsigned char* plocal_symbols
);
636 // Scan the relocations to look for symbol adjustments.
638 scan_relocs(Symbol_table
* symtab
,
640 Sized_relobj_file
<size
, big_endian
>* object
,
641 unsigned int data_shndx
,
642 unsigned int sh_type
,
643 const unsigned char* prelocs
,
645 Output_section
* output_section
,
646 bool needs_special_offset_handling
,
647 size_t local_symbol_count
,
648 const unsigned char* plocal_symbols
);
650 // Map input .toc section to output .got section.
652 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
654 if (size
== 64 && strcmp(name
, ".toc") == 0)
662 // Provide linker defined save/restore functions.
664 define_save_restore_funcs(Layout
*, Symbol_table
*);
666 // No stubs unless a final link.
669 { return !parameters
->options().relocatable(); }
672 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
675 do_plt_fde_location(const Output_data
*, unsigned char*,
676 uint64_t*, off_t
*) const;
678 // Stash info about branches, for stub generation.
680 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
681 unsigned int data_shndx
, Address r_offset
,
682 unsigned int r_type
, unsigned int r_sym
, Address addend
)
684 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
685 this->branch_info_
.push_back(info
);
686 if (r_type
== elfcpp::R_POWERPC_REL14
687 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
688 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
689 ppc_object
->set_has_14bit_branch(data_shndx
);
692 // Return whether the last branch is a plt call, and if so, mark the
693 // branch as having an R_PPC64_TOCSAVE.
695 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
696 unsigned int data_shndx
, Address r_offset
, Symbol_table
* symtab
)
699 && !this->branch_info_
.empty()
700 && this->branch_info_
.back().mark_pltcall(ppc_object
, data_shndx
,
701 r_offset
, this, symtab
));
704 // Say the given location, that of a nop in a function prologue with
705 // an R_PPC64_TOCSAVE reloc, will be used to save r2.
706 // R_PPC64_TOCSAVE relocs on nops following calls point at this nop.
708 add_tocsave(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
709 unsigned int shndx
, Address offset
)
712 loc
.object
= ppc_object
;
715 this->tocsave_loc_
.insert(loc
);
722 return this->tocsave_loc_
;
726 do_define_standard_symbols(Symbol_table
*, Layout
*);
728 // Finalize the sections.
730 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
732 // Return the value to use for a dynamic which requires special
735 do_dynsym_value(const Symbol
*) const;
737 // Return the PLT address to use for a local symbol.
739 do_plt_address_for_local(const Relobj
*, unsigned int) const;
741 // Return the PLT address to use for a global symbol.
743 do_plt_address_for_global(const Symbol
*) const;
745 // Return the offset to use for the GOT_INDX'th got entry which is
746 // for a local tls symbol specified by OBJECT, SYMNDX.
748 do_tls_offset_for_local(const Relobj
* object
,
750 unsigned int got_indx
) const;
752 // Return the offset to use for the GOT_INDX'th got entry which is
753 // for global tls symbol GSYM.
755 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
758 do_function_location(Symbol_location
*) const;
761 do_can_check_for_function_pointers() const
764 // Adjust -fsplit-stack code which calls non-split-stack code.
766 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
767 section_offset_type fnoffset
, section_size_type fnsize
,
768 const unsigned char* prelocs
, size_t reloc_count
,
769 unsigned char* view
, section_size_type view_size
,
770 std::string
* from
, std::string
* to
) const;
772 // Relocate a section.
774 relocate_section(const Relocate_info
<size
, big_endian
>*,
775 unsigned int sh_type
,
776 const unsigned char* prelocs
,
778 Output_section
* output_section
,
779 bool needs_special_offset_handling
,
781 Address view_address
,
782 section_size_type view_size
,
783 const Reloc_symbol_changes
*);
785 // Scan the relocs during a relocatable link.
787 scan_relocatable_relocs(Symbol_table
* symtab
,
789 Sized_relobj_file
<size
, big_endian
>* object
,
790 unsigned int data_shndx
,
791 unsigned int sh_type
,
792 const unsigned char* prelocs
,
794 Output_section
* output_section
,
795 bool needs_special_offset_handling
,
796 size_t local_symbol_count
,
797 const unsigned char* plocal_symbols
,
798 Relocatable_relocs
*);
800 // Scan the relocs for --emit-relocs.
802 emit_relocs_scan(Symbol_table
* symtab
,
804 Sized_relobj_file
<size
, big_endian
>* object
,
805 unsigned int data_shndx
,
806 unsigned int sh_type
,
807 const unsigned char* prelocs
,
809 Output_section
* output_section
,
810 bool needs_special_offset_handling
,
811 size_t local_symbol_count
,
812 const unsigned char* plocal_syms
,
813 Relocatable_relocs
* rr
);
815 // Emit relocations for a section.
817 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
818 unsigned int sh_type
,
819 const unsigned char* prelocs
,
821 Output_section
* output_section
,
822 typename
elfcpp::Elf_types
<size
>::Elf_Off
823 offset_in_output_section
,
825 Address view_address
,
827 unsigned char* reloc_view
,
828 section_size_type reloc_view_size
);
830 // Return whether SYM is defined by the ABI.
832 do_is_defined_by_abi(const Symbol
* sym
) const
834 return strcmp(sym
->name(), "__tls_get_addr") == 0;
837 // Return the size of the GOT section.
841 gold_assert(this->got_
!= NULL
);
842 return this->got_
->data_size();
845 // Get the PLT section.
846 const Output_data_plt_powerpc
<size
, big_endian
>*
849 gold_assert(this->plt_
!= NULL
);
853 // Get the IPLT section.
854 const Output_data_plt_powerpc
<size
, big_endian
>*
857 gold_assert(this->iplt_
!= NULL
);
861 // Get the .glink section.
862 const Output_data_glink
<size
, big_endian
>*
863 glink_section() const
865 gold_assert(this->glink_
!= NULL
);
869 Output_data_glink
<size
, big_endian
>*
872 gold_assert(this->glink_
!= NULL
);
876 bool has_glink() const
877 { return this->glink_
!= NULL
; }
879 // Get the GOT section.
880 const Output_data_got_powerpc
<size
, big_endian
>*
883 gold_assert(this->got_
!= NULL
);
887 // Get the GOT section, creating it if necessary.
888 Output_data_got_powerpc
<size
, big_endian
>*
889 got_section(Symbol_table
*, Layout
*);
892 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
893 const elfcpp::Ehdr
<size
, big_endian
>&);
895 // Return the number of entries in the GOT.
897 got_entry_count() const
899 if (this->got_
== NULL
)
901 return this->got_size() / (size
/ 8);
904 // Return the number of entries in the PLT.
906 plt_entry_count() const;
908 // Return the offset of the first non-reserved PLT entry.
910 first_plt_entry_offset() const
914 if (this->abiversion() >= 2)
919 // Return the size of each PLT entry.
921 plt_entry_size() const
925 if (this->abiversion() >= 2)
930 Output_data_save_res
<size
, big_endian
>*
931 savres_section() const
933 return this->savres_section_
;
936 // Add any special sections for this symbol to the gc work list.
937 // For powerpc64, this adds the code section of a function
940 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
942 // Handle target specific gc actions when adding a gc reference from
943 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
944 // and DST_OFF. For powerpc64, this adds a referenc to the code
945 // section of a function descriptor.
947 do_gc_add_reference(Symbol_table
* symtab
,
949 unsigned int src_shndx
,
951 unsigned int dst_shndx
,
952 Address dst_off
) const;
954 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
957 { return this->stub_tables_
; }
959 const Output_data_brlt_powerpc
<size
, big_endian
>*
961 { return this->brlt_section_
; }
964 add_branch_lookup_table(Address to
)
966 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
967 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
971 find_branch_lookup_table(Address to
)
973 typename
Branch_lookup_table::const_iterator p
974 = this->branch_lookup_table_
.find(to
);
975 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
979 write_branch_lookup_table(unsigned char *oview
)
981 for (typename
Branch_lookup_table::const_iterator p
982 = this->branch_lookup_table_
.begin();
983 p
!= this->branch_lookup_table_
.end();
986 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
990 // Wrapper used after relax to define a local symbol in output data,
991 // from the end if value < 0.
993 define_local(Symbol_table
* symtab
, const char* name
,
994 Output_data
* od
, Address value
, unsigned int symsize
)
997 = symtab
->define_in_output_data(name
, NULL
, Symbol_table::PREDEFINED
,
998 od
, value
, symsize
, elfcpp::STT_NOTYPE
,
999 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
, 0,
1000 static_cast<Signed_address
>(value
) < 0,
1002 // We are creating this symbol late, so need to fix up things
1003 // done early in Layout::finalize.
1004 sym
->set_dynsym_index(-1U);
1008 plt_thread_safe() const
1009 { return this->plt_thread_safe_
; }
1012 plt_localentry0() const
1013 { return this->plt_localentry0_
; }
1016 set_has_localentry0()
1018 this->has_localentry0_
= true;
1022 is_elfv2_localentry0(const Symbol
* gsym
) const
1025 && this->abiversion() >= 2
1026 && this->plt_localentry0()
1027 && gsym
->type() == elfcpp::STT_FUNC
1028 && gsym
->is_defined()
1029 && gsym
->nonvis() >> 3 == 0
1030 && !gsym
->non_zero_localentry());
1034 is_elfv2_localentry0(const Sized_relobj_file
<size
, big_endian
>* object
,
1035 unsigned int r_sym
) const
1037 const Powerpc_relobj
<size
, big_endian
>* ppc_object
1038 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
1041 && this->abiversion() >= 2
1042 && this->plt_localentry0()
1043 && ppc_object
->st_other(r_sym
) >> 5 == 0)
1045 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
1047 if (!psymval
->is_ifunc_symbol()
1048 && psymval
->input_shndx(&is_ordinary
) != elfcpp::SHN_UNDEF
1055 // Remember any symbols seen with non-zero localentry, even those
1056 // not providing a definition
1058 resolve(Symbol
* to
, const elfcpp::Sym
<size
, big_endian
>& sym
, Object
*,
1063 unsigned char st_other
= sym
.get_st_other();
1064 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1065 to
->set_non_zero_localentry();
1067 // We haven't resolved anything, continue normal processing.
1073 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
1076 set_abiversion(int ver
)
1078 elfcpp::Elf_Word flags
= this->processor_specific_flags();
1079 flags
&= ~elfcpp::EF_PPC64_ABI
;
1080 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
1081 this->set_processor_specific_flags(flags
);
1084 // Offset to toc save stack slot
1087 { return this->abiversion() < 2 ? 40 : 24; }
1103 : tls_get_addr_state_(NOT_EXPECTED
),
1104 relinfo_(NULL
), relnum_(0), r_offset_(0)
1109 if (this->tls_get_addr_state_
!= NOT_EXPECTED
)
1116 if (this->relinfo_
!= NULL
)
1117 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
1118 _("missing expected __tls_get_addr call"));
1122 expect_tls_get_addr_call(
1123 const Relocate_info
<size
, big_endian
>* relinfo
,
1127 this->tls_get_addr_state_
= EXPECTED
;
1128 this->relinfo_
= relinfo
;
1129 this->relnum_
= relnum
;
1130 this->r_offset_
= r_offset
;
1134 expect_tls_get_addr_call()
1135 { this->tls_get_addr_state_
= EXPECTED
; }
1138 skip_next_tls_get_addr_call()
1139 {this->tls_get_addr_state_
= SKIP
; }
1142 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
1144 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
1145 || r_type
== elfcpp::R_PPC_PLTREL24
)
1147 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
1148 Tls_get_addr last_tls
= this->tls_get_addr_state_
;
1149 this->tls_get_addr_state_
= NOT_EXPECTED
;
1150 if (is_tls_call
&& last_tls
!= EXPECTED
)
1152 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
1161 // What we're up to regarding calls to __tls_get_addr.
1162 // On powerpc, the branch and link insn making a call to
1163 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1164 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1165 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1166 // The marker relocation always comes first, and has the same
1167 // symbol as the reloc on the insn setting up the __tls_get_addr
1168 // argument. This ties the arg setup insn with the call insn,
1169 // allowing ld to safely optimize away the call. We check that
1170 // every call to __tls_get_addr has a marker relocation, and that
1171 // every marker relocation is on a call to __tls_get_addr.
1172 Tls_get_addr tls_get_addr_state_
;
1173 // Info about the last reloc for error message.
1174 const Relocate_info
<size
, big_endian
>* relinfo_
;
1179 // The class which scans relocations.
1180 class Scan
: protected Track_tls
1183 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1186 : Track_tls(), issued_non_pic_error_(false)
1190 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
1193 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1194 Sized_relobj_file
<size
, big_endian
>* object
,
1195 unsigned int data_shndx
,
1196 Output_section
* output_section
,
1197 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1198 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1202 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1203 Sized_relobj_file
<size
, big_endian
>* object
,
1204 unsigned int data_shndx
,
1205 Output_section
* output_section
,
1206 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1210 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1212 Sized_relobj_file
<size
, big_endian
>* relobj
,
1215 const elfcpp::Rela
<size
, big_endian
>& ,
1216 unsigned int r_type
,
1217 const elfcpp::Sym
<size
, big_endian
>&)
1219 // PowerPC64 .opd is not folded, so any identical function text
1220 // may be folded and we'll still keep function addresses distinct.
1221 // That means no reloc is of concern here.
1224 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1225 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1226 if (ppcobj
->abiversion() == 1)
1229 // For 32-bit and ELFv2, conservatively assume anything but calls to
1230 // function code might be taking the address of the function.
1231 return !is_branch_reloc(r_type
);
1235 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1237 Sized_relobj_file
<size
, big_endian
>* relobj
,
1240 const elfcpp::Rela
<size
, big_endian
>& ,
1241 unsigned int r_type
,
1247 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1248 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1249 if (ppcobj
->abiversion() == 1)
1252 return !is_branch_reloc(r_type
);
1256 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1257 Sized_relobj_file
<size
, big_endian
>* object
,
1258 unsigned int r_type
, bool report_err
);
1262 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1263 unsigned int r_type
);
1266 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1267 unsigned int r_type
, Symbol
*);
1270 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1271 Target_powerpc
* target
);
1274 check_non_pic(Relobj
*, unsigned int r_type
);
1276 // Whether we have issued an error about a non-PIC compilation.
1277 bool issued_non_pic_error_
;
1281 symval_for_branch(const Symbol_table
* symtab
,
1282 const Sized_symbol
<size
>* gsym
,
1283 Powerpc_relobj
<size
, big_endian
>* object
,
1284 Address
*value
, unsigned int *dest_shndx
);
1286 // The class which implements relocation.
1287 class Relocate
: protected Track_tls
1290 // Use 'at' branch hints when true, 'y' when false.
1291 // FIXME maybe: set this with an option.
1292 static const bool is_isa_v2
= true;
1298 // Do a relocation. Return false if the caller should not issue
1299 // any warnings about this relocation.
1301 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1302 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1303 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1304 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1308 class Relocate_comdat_behavior
1311 // Decide what the linker should do for relocations that refer to
1312 // discarded comdat sections.
1313 inline Comdat_behavior
1314 get(const char* name
)
1316 gold::Default_comdat_behavior default_behavior
;
1317 Comdat_behavior ret
= default_behavior
.get(name
);
1318 if (ret
== CB_WARNING
)
1321 && (strcmp(name
, ".fixup") == 0
1322 || strcmp(name
, ".got2") == 0))
1325 && (strcmp(name
, ".opd") == 0
1326 || strcmp(name
, ".toc") == 0
1327 || strcmp(name
, ".toc1") == 0))
1334 // Optimize the TLS relocation type based on what we know about the
1335 // symbol. IS_FINAL is true if the final address of this symbol is
1336 // known at link time.
1338 tls::Tls_optimization
1339 optimize_tls_gd(bool is_final
)
1341 // If we are generating a shared library, then we can't do anything
1343 if (parameters
->options().shared()
1344 || !parameters
->options().tls_optimize())
1345 return tls::TLSOPT_NONE
;
1348 return tls::TLSOPT_TO_IE
;
1349 return tls::TLSOPT_TO_LE
;
1352 tls::Tls_optimization
1355 if (parameters
->options().shared()
1356 || !parameters
->options().tls_optimize())
1357 return tls::TLSOPT_NONE
;
1359 return tls::TLSOPT_TO_LE
;
1362 tls::Tls_optimization
1363 optimize_tls_ie(bool is_final
)
1366 || parameters
->options().shared()
1367 || !parameters
->options().tls_optimize())
1368 return tls::TLSOPT_NONE
;
1370 return tls::TLSOPT_TO_LE
;
1375 make_glink_section(Layout
*);
1377 // Create the PLT section.
1379 make_plt_section(Symbol_table
*, Layout
*);
1382 make_iplt_section(Symbol_table
*, Layout
*);
1385 make_brlt_section(Layout
*);
1387 // Create a PLT entry for a global symbol.
1389 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1391 // Create a PLT entry for a local IFUNC symbol.
1393 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1394 Sized_relobj_file
<size
, big_endian
>*,
1398 // Create a GOT entry for local dynamic __tls_get_addr.
1400 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1401 Sized_relobj_file
<size
, big_endian
>* object
);
1404 tlsld_got_offset() const
1406 return this->tlsld_got_offset_
;
1409 // Get the dynamic reloc section, creating it if necessary.
1411 rela_dyn_section(Layout
*);
1413 // Similarly, but for ifunc symbols get the one for ifunc.
1415 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1417 // Copy a relocation against a global symbol.
1419 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1420 Sized_relobj_file
<size
, big_endian
>* object
,
1421 unsigned int shndx
, Output_section
* output_section
,
1422 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1424 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1425 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1426 symtab
->get_sized_symbol
<size
>(sym
),
1427 object
, shndx
, output_section
,
1428 r_type
, reloc
.get_r_offset(),
1429 reloc
.get_r_addend(),
1430 this->rela_dyn_section(layout
));
1433 // Look over all the input sections, deciding where to place stubs.
1435 group_sections(Layout
*, const Task
*, bool);
1437 // Sort output sections by address.
1438 struct Sort_sections
1441 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1442 { return sec1
->address() < sec2
->address(); }
1448 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1449 unsigned int data_shndx
,
1451 unsigned int r_type
,
1454 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1455 r_type_(r_type
), tocsave_ (0), r_sym_(r_sym
), addend_(addend
)
1461 // Return whether this branch is going via a plt call stub, and if
1462 // so, mark it as having an R_PPC64_TOCSAVE.
1464 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1465 unsigned int shndx
, Address offset
,
1466 Target_powerpc
* target
, Symbol_table
* symtab
);
1468 // If this branch needs a plt call stub, or a long branch stub, make one.
1470 make_stub(Stub_table
<size
, big_endian
>*,
1471 Stub_table
<size
, big_endian
>*,
1472 Symbol_table
*) const;
1475 // The branch location..
1476 Powerpc_relobj
<size
, big_endian
>* object_
;
1477 unsigned int shndx_
;
1479 // ..and the branch type and destination.
1480 unsigned int r_type_
: 31;
1481 unsigned int tocsave_
: 1;
1482 unsigned int r_sym_
;
1486 // Information about this specific target which we pass to the
1487 // general Target structure.
1488 static Target::Target_info powerpc_info
;
1490 // The types of GOT entries needed for this platform.
1491 // These values are exposed to the ABI in an incremental link.
1492 // Do not renumber existing values without changing the version
1493 // number of the .gnu_incremental_inputs section.
1497 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1498 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1499 GOT_TYPE_TPREL
// entry for @got@tprel
1503 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1504 // The PLT section. This is a container for a table of addresses,
1505 // and their relocations. Each address in the PLT has a dynamic
1506 // relocation (R_*_JMP_SLOT) and each address will have a
1507 // corresponding entry in .glink for lazy resolution of the PLT.
1508 // ppc32 initialises the PLT to point at the .glink entry, while
1509 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1510 // linker adds a stub that loads the PLT entry into ctr then
1511 // branches to ctr. There may be more than one stub for each PLT
1512 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1513 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1514 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1515 // The IPLT section. Like plt_, this is a container for a table of
1516 // addresses and their relocations, specifically for STT_GNU_IFUNC
1517 // functions that resolve locally (STT_GNU_IFUNC functions that
1518 // don't resolve locally go in PLT). Unlike plt_, these have no
1519 // entry in .glink for lazy resolution, and the relocation section
1520 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1521 // the relocation section may contain relocations against
1522 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1523 // relocation section will appear at the end of other dynamic
1524 // relocations, so that ld.so applies these relocations after other
1525 // dynamic relocations. In a static executable, the relocation
1526 // section is emitted and marked with __rela_iplt_start and
1527 // __rela_iplt_end symbols.
1528 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1529 // Section holding long branch destinations.
1530 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1531 // The .glink section.
1532 Output_data_glink
<size
, big_endian
>* glink_
;
1533 // The dynamic reloc section.
1534 Reloc_section
* rela_dyn_
;
1535 // Relocs saved to avoid a COPY reloc.
1536 Powerpc_copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1537 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1538 unsigned int tlsld_got_offset_
;
1540 Stub_tables stub_tables_
;
1541 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1542 Branch_lookup_table branch_lookup_table_
;
1544 typedef std::vector
<Branch_info
> Branches
;
1545 Branches branch_info_
;
1546 Tocsave_loc tocsave_loc_
;
1548 bool plt_thread_safe_
;
1549 bool plt_localentry0_
;
1550 bool plt_localentry0_init_
;
1551 bool has_localentry0_
;
1554 int relax_fail_count_
;
1555 int32_t stub_group_size_
;
1557 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1561 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1564 true, // is_big_endian
1565 elfcpp::EM_PPC
, // machine_code
1566 false, // has_make_symbol
1567 false, // has_resolve
1568 false, // has_code_fill
1569 true, // is_default_stack_executable
1570 false, // can_icf_inline_merge_sections
1572 "/usr/lib/ld.so.1", // dynamic_linker
1573 0x10000000, // default_text_segment_address
1574 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1575 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1576 false, // isolate_execinstr
1578 elfcpp::SHN_UNDEF
, // small_common_shndx
1579 elfcpp::SHN_UNDEF
, // large_common_shndx
1580 0, // small_common_section_flags
1581 0, // large_common_section_flags
1582 NULL
, // attributes_section
1583 NULL
, // attributes_vendor
1584 "_start", // entry_symbol_name
1585 32, // hash_entry_size
1589 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1592 false, // is_big_endian
1593 elfcpp::EM_PPC
, // machine_code
1594 false, // has_make_symbol
1595 false, // has_resolve
1596 false, // has_code_fill
1597 true, // is_default_stack_executable
1598 false, // can_icf_inline_merge_sections
1600 "/usr/lib/ld.so.1", // dynamic_linker
1601 0x10000000, // default_text_segment_address
1602 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1603 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1604 false, // isolate_execinstr
1606 elfcpp::SHN_UNDEF
, // small_common_shndx
1607 elfcpp::SHN_UNDEF
, // large_common_shndx
1608 0, // small_common_section_flags
1609 0, // large_common_section_flags
1610 NULL
, // attributes_section
1611 NULL
, // attributes_vendor
1612 "_start", // entry_symbol_name
1613 32, // hash_entry_size
1617 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1620 true, // is_big_endian
1621 elfcpp::EM_PPC64
, // machine_code
1622 false, // has_make_symbol
1623 true, // has_resolve
1624 false, // has_code_fill
1625 true, // is_default_stack_executable
1626 false, // can_icf_inline_merge_sections
1628 "/usr/lib/ld.so.1", // dynamic_linker
1629 0x10000000, // default_text_segment_address
1630 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1631 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1632 false, // isolate_execinstr
1634 elfcpp::SHN_UNDEF
, // small_common_shndx
1635 elfcpp::SHN_UNDEF
, // large_common_shndx
1636 0, // small_common_section_flags
1637 0, // large_common_section_flags
1638 NULL
, // attributes_section
1639 NULL
, // attributes_vendor
1640 "_start", // entry_symbol_name
1641 32, // hash_entry_size
1645 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1648 false, // is_big_endian
1649 elfcpp::EM_PPC64
, // machine_code
1650 false, // has_make_symbol
1651 true, // has_resolve
1652 false, // has_code_fill
1653 true, // is_default_stack_executable
1654 false, // can_icf_inline_merge_sections
1656 "/usr/lib/ld.so.1", // dynamic_linker
1657 0x10000000, // default_text_segment_address
1658 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1659 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1660 false, // isolate_execinstr
1662 elfcpp::SHN_UNDEF
, // small_common_shndx
1663 elfcpp::SHN_UNDEF
, // large_common_shndx
1664 0, // small_common_section_flags
1665 0, // large_common_section_flags
1666 NULL
, // attributes_section
1667 NULL
, // attributes_vendor
1668 "_start", // entry_symbol_name
1669 32, // hash_entry_size
1673 is_branch_reloc(unsigned int r_type
)
1675 return (r_type
== elfcpp::R_POWERPC_REL24
1676 || r_type
== elfcpp::R_PPC_PLTREL24
1677 || r_type
== elfcpp::R_PPC_LOCAL24PC
1678 || r_type
== elfcpp::R_POWERPC_REL14
1679 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1680 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1681 || r_type
== elfcpp::R_POWERPC_ADDR24
1682 || r_type
== elfcpp::R_POWERPC_ADDR14
1683 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1684 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1687 // If INSN is an opcode that may be used with an @tls operand, return
1688 // the transformed insn for TLS optimisation, otherwise return 0. If
1689 // REG is non-zero only match an insn with RB or RA equal to REG.
1691 at_tls_transform(uint32_t insn
, unsigned int reg
)
1693 if ((insn
& (0x3f << 26)) != 31 << 26)
1697 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1698 rtra
= insn
& ((1 << 26) - (1 << 16));
1699 else if (((insn
>> 16) & 0x1f) == reg
)
1700 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1704 if ((insn
& (0x3ff << 1)) == 266 << 1)
1707 else if ((insn
& (0x1f << 1)) == 23 << 1
1708 && ((insn
& (0x1f << 6)) < 14 << 6
1709 || ((insn
& (0x1f << 6)) >= 16 << 6
1710 && (insn
& (0x1f << 6)) < 24 << 6)))
1711 // load and store indexed -> dform
1712 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1713 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1714 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1715 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1716 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1718 insn
= (58 << 26) | 2;
1726 template<int size
, bool big_endian
>
1727 class Powerpc_relocate_functions
1747 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1748 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1749 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1751 template<int valsize
>
1753 has_overflow_signed(Address value
)
1755 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1756 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1757 limit
<<= ((valsize
- 1) >> 1);
1758 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1759 return value
+ limit
> (limit
<< 1) - 1;
1762 template<int valsize
>
1764 has_overflow_unsigned(Address value
)
1766 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1767 limit
<<= ((valsize
- 1) >> 1);
1768 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1769 return value
> (limit
<< 1) - 1;
1772 template<int valsize
>
1774 has_overflow_bitfield(Address value
)
1776 return (has_overflow_unsigned
<valsize
>(value
)
1777 && has_overflow_signed
<valsize
>(value
));
1780 template<int valsize
>
1781 static inline Status
1782 overflowed(Address value
, Overflow_check overflow
)
1784 if (overflow
== CHECK_SIGNED
)
1786 if (has_overflow_signed
<valsize
>(value
))
1787 return STATUS_OVERFLOW
;
1789 else if (overflow
== CHECK_UNSIGNED
)
1791 if (has_overflow_unsigned
<valsize
>(value
))
1792 return STATUS_OVERFLOW
;
1794 else if (overflow
== CHECK_BITFIELD
)
1796 if (has_overflow_bitfield
<valsize
>(value
))
1797 return STATUS_OVERFLOW
;
1802 // Do a simple RELA relocation
1803 template<int fieldsize
, int valsize
>
1804 static inline Status
1805 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1807 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1808 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1809 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1810 return overflowed
<valsize
>(value
, overflow
);
1813 template<int fieldsize
, int valsize
>
1814 static inline Status
1815 rela(unsigned char* view
,
1816 unsigned int right_shift
,
1817 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1819 Overflow_check overflow
)
1821 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1822 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1823 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1824 Valtype reloc
= value
>> right_shift
;
1827 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1828 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1831 // Do a simple RELA relocation, unaligned.
1832 template<int fieldsize
, int valsize
>
1833 static inline Status
1834 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1836 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1837 return overflowed
<valsize
>(value
, overflow
);
1840 template<int fieldsize
, int valsize
>
1841 static inline Status
1842 rela_ua(unsigned char* view
,
1843 unsigned int right_shift
,
1844 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1846 Overflow_check overflow
)
1848 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1850 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1851 Valtype reloc
= value
>> right_shift
;
1854 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1855 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1859 // R_PPC64_ADDR64: (Symbol + Addend)
1861 addr64(unsigned char* view
, Address value
)
1862 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1864 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1866 addr64_u(unsigned char* view
, Address value
)
1867 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1869 // R_POWERPC_ADDR32: (Symbol + Addend)
1870 static inline Status
1871 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1872 { return This::template rela
<32,32>(view
, value
, overflow
); }
1874 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1875 static inline Status
1876 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1877 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1879 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1880 static inline Status
1881 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1883 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1885 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1886 stat
= STATUS_OVERFLOW
;
1890 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1891 static inline Status
1892 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1893 { return This::template rela
<16,16>(view
, value
, overflow
); }
1895 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1896 static inline Status
1897 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1898 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1900 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1901 static inline Status
1902 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1904 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1905 if ((value
& 3) != 0)
1906 stat
= STATUS_OVERFLOW
;
1910 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1911 static inline Status
1912 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1914 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1915 if ((value
& 15) != 0)
1916 stat
= STATUS_OVERFLOW
;
1920 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1922 addr16_hi(unsigned char* view
, Address value
)
1923 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1925 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1927 addr16_ha(unsigned char* view
, Address value
)
1928 { This::addr16_hi(view
, value
+ 0x8000); }
1930 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1932 addr16_hi2(unsigned char* view
, Address value
)
1933 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1935 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1937 addr16_ha2(unsigned char* view
, Address value
)
1938 { This::addr16_hi2(view
, value
+ 0x8000); }
1940 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1942 addr16_hi3(unsigned char* view
, Address value
)
1943 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1945 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1947 addr16_ha3(unsigned char* view
, Address value
)
1948 { This::addr16_hi3(view
, value
+ 0x8000); }
1950 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1951 static inline Status
1952 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1954 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1955 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1956 stat
= STATUS_OVERFLOW
;
1960 // R_POWERPC_REL16DX_HA
1961 static inline Status
1962 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
1964 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
1965 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1966 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
1968 value
= static_cast<SignedAddress
>(value
) >> 16;
1969 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
1970 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
1971 return overflowed
<16>(value
, overflow
);
1975 // Set ABI version for input and output.
1977 template<int size
, bool big_endian
>
1979 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1981 this->e_flags_
|= ver
;
1982 if (this->abiversion() != 0)
1984 Target_powerpc
<size
, big_endian
>* target
=
1985 static_cast<Target_powerpc
<size
, big_endian
>*>(
1986 parameters
->sized_target
<size
, big_endian
>());
1987 if (target
->abiversion() == 0)
1988 target
->set_abiversion(this->abiversion());
1989 else if (target
->abiversion() != this->abiversion())
1990 gold_error(_("%s: ABI version %d is not compatible "
1991 "with ABI version %d output"),
1992 this->name().c_str(),
1993 this->abiversion(), target
->abiversion());
1998 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
1999 // relocatable object, if such sections exists.
2001 template<int size
, bool big_endian
>
2003 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
2004 Read_symbols_data
* sd
)
2006 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2007 const unsigned char* namesu
= sd
->section_names
->data();
2008 const char* names
= reinterpret_cast<const char*>(namesu
);
2009 section_size_type names_size
= sd
->section_names_size
;
2010 const unsigned char* s
;
2012 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
2013 size
== 32 ? ".got2" : ".opd",
2014 names
, names_size
, NULL
);
2017 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2018 this->special_
= ndx
;
2021 if (this->abiversion() == 0)
2022 this->set_abiversion(1);
2023 else if (this->abiversion() > 1)
2024 gold_error(_("%s: .opd invalid in abiv%d"),
2025 this->name().c_str(), this->abiversion());
2030 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
2031 names
, names_size
, NULL
);
2034 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2035 this->relatoc_
= ndx
;
2036 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2037 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
2040 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
2043 // Examine .rela.opd to build info about function entry points.
2045 template<int size
, bool big_endian
>
2047 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
2049 const unsigned char* prelocs
,
2050 const unsigned char* plocal_syms
)
2054 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
2055 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
2056 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2057 Address expected_off
= 0;
2058 bool regular
= true;
2059 unsigned int opd_ent_size
= 0;
2061 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2063 Reltype
reloc(prelocs
);
2064 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
2065 = reloc
.get_r_info();
2066 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2067 if (r_type
== elfcpp::R_PPC64_ADDR64
)
2069 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2070 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
2073 if (r_sym
< this->local_symbol_count())
2075 typename
elfcpp::Sym
<size
, big_endian
>
2076 lsym(plocal_syms
+ r_sym
* sym_size
);
2077 shndx
= lsym
.get_st_shndx();
2078 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2079 value
= lsym
.get_st_value();
2082 shndx
= this->symbol_section_and_value(r_sym
, &value
,
2084 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
2085 value
+ reloc
.get_r_addend());
2088 expected_off
= reloc
.get_r_offset();
2089 opd_ent_size
= expected_off
;
2091 else if (expected_off
!= reloc
.get_r_offset())
2093 expected_off
+= opd_ent_size
;
2095 else if (r_type
== elfcpp::R_PPC64_TOC
)
2097 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
2102 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2103 this->name().c_str(), r_type
);
2107 if (reloc_count
<= 2)
2108 opd_ent_size
= this->section_size(this->opd_shndx());
2109 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
2113 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2114 this->name().c_str());
2120 // Returns true if a code sequence loading the TOC entry at VALUE
2121 // relative to the TOC pointer can be converted into code calculating
2122 // a TOC pointer relative offset.
2123 // If so, the TOC pointer relative offset is stored to VALUE.
2125 template<int size
, bool big_endian
>
2127 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
2128 Target_powerpc
<size
, big_endian
>* target
,
2134 // With -mcmodel=medium code it is quite possible to have
2135 // toc-relative relocs referring to objects outside the TOC.
2136 // Don't try to look at a non-existent TOC.
2137 if (this->toc_shndx() == 0)
2140 // Convert VALUE back to an address by adding got_base (see below),
2141 // then to an offset in the TOC by subtracting the TOC output
2142 // section address and the TOC output offset. Since this TOC output
2143 // section and the got output section are one and the same, we can
2144 // omit adding and subtracting the output section address.
2145 Address off
= (*value
+ this->toc_base_offset()
2146 - this->output_section_offset(this->toc_shndx()));
2147 // Is this offset in the TOC? -mcmodel=medium code may be using
2148 // TOC relative access to variables outside the TOC. Those of
2149 // course can't be optimized. We also don't try to optimize code
2150 // that is using a different object's TOC.
2151 if (off
>= this->section_size(this->toc_shndx()))
2154 if (this->no_toc_opt(off
))
2157 section_size_type vlen
;
2158 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2159 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2161 Address got_base
= (target
->got_section()->output_section()->address()
2162 + this->toc_base_offset());
2164 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2171 // Perform the Sized_relobj_file method, then set up opd info from
2174 template<int size
, bool big_endian
>
2176 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2178 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2181 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2182 p
!= rd
->relocs
.end();
2185 if (p
->data_shndx
== this->opd_shndx())
2187 uint64_t opd_size
= this->section_size(this->opd_shndx());
2188 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2191 this->init_opd(opd_size
);
2192 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2193 rd
->local_symbols
->data());
2201 // Read the symbols then set up st_other vector.
2203 template<int size
, bool big_endian
>
2205 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2207 this->base_read_symbols(sd
);
2210 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2211 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2212 const unsigned int loccount
= this->do_local_symbol_count();
2215 this->st_other_
.resize(loccount
);
2216 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2217 off_t locsize
= loccount
* sym_size
;
2218 const unsigned int symtab_shndx
= this->symtab_shndx();
2219 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2220 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2221 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2222 locsize
, true, false);
2224 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2226 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2227 unsigned char st_other
= sym
.get_st_other();
2228 this->st_other_
[i
] = st_other
;
2229 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2231 if (this->abiversion() == 0)
2232 this->set_abiversion(2);
2233 else if (this->abiversion() < 2)
2234 gold_error(_("%s: local symbol %d has invalid st_other"
2235 " for ABI version 1"),
2236 this->name().c_str(), i
);
2243 template<int size
, bool big_endian
>
2245 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2247 this->e_flags_
|= ver
;
2248 if (this->abiversion() != 0)
2250 Target_powerpc
<size
, big_endian
>* target
=
2251 static_cast<Target_powerpc
<size
, big_endian
>*>(
2252 parameters
->sized_target
<size
, big_endian
>());
2253 if (target
->abiversion() == 0)
2254 target
->set_abiversion(this->abiversion());
2255 else if (target
->abiversion() != this->abiversion())
2256 gold_error(_("%s: ABI version %d is not compatible "
2257 "with ABI version %d output"),
2258 this->name().c_str(),
2259 this->abiversion(), target
->abiversion());
2264 // Call Sized_dynobj::base_read_symbols to read the symbols then
2265 // read .opd from a dynamic object, filling in opd_ent_ vector,
2267 template<int size
, bool big_endian
>
2269 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2271 this->base_read_symbols(sd
);
2274 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2275 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2276 const unsigned char* namesu
= sd
->section_names
->data();
2277 const char* names
= reinterpret_cast<const char*>(namesu
);
2278 const unsigned char* s
= NULL
;
2279 const unsigned char* opd
;
2280 section_size_type opd_size
;
2282 // Find and read .opd section.
2285 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2286 sd
->section_names_size
,
2291 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2292 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2293 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2295 if (this->abiversion() == 0)
2296 this->set_abiversion(1);
2297 else if (this->abiversion() > 1)
2298 gold_error(_("%s: .opd invalid in abiv%d"),
2299 this->name().c_str(), this->abiversion());
2301 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2302 this->opd_address_
= shdr
.get_sh_addr();
2303 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2304 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2310 // Build set of executable sections.
2311 // Using a set is probably overkill. There is likely to be only
2312 // a few executable sections, typically .init, .text and .fini,
2313 // and they are generally grouped together.
2314 typedef std::set
<Sec_info
> Exec_sections
;
2315 Exec_sections exec_sections
;
2317 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2319 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2320 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2321 && ((shdr
.get_sh_flags()
2322 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2323 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2324 && shdr
.get_sh_size() != 0)
2326 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2327 shdr
.get_sh_size(), i
));
2330 if (exec_sections
.empty())
2333 // Look over the OPD entries. This is complicated by the fact
2334 // that some binaries will use two-word entries while others
2335 // will use the standard three-word entries. In most cases
2336 // the third word (the environment pointer for languages like
2337 // Pascal) is unused and will be zero. If the third word is
2338 // used it should not be pointing into executable sections,
2340 this->init_opd(opd_size
);
2341 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2343 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2344 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2345 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2347 // Chances are that this is the third word of an OPD entry.
2349 typename
Exec_sections::const_iterator e
2350 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2351 if (e
!= exec_sections
.begin())
2354 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2356 // We have an address in an executable section.
2357 // VAL ought to be the function entry, set it up.
2358 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2359 // Skip second word of OPD entry, the TOC pointer.
2363 // If we didn't match any executable sections, we likely
2364 // have a non-zero third word in the OPD entry.
2369 // Relocate sections.
2371 template<int size
, bool big_endian
>
2373 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2374 const Symbol_table
* symtab
, const Layout
* layout
,
2375 const unsigned char* pshdrs
, Output_file
* of
,
2376 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2378 unsigned int start
= 1;
2380 && this->relatoc_
!= 0
2381 && !parameters
->options().relocatable())
2383 // Relocate .toc first.
2384 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2385 this->relatoc_
, this->relatoc_
);
2386 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2387 1, this->relatoc_
- 1);
2388 start
= this->relatoc_
+ 1;
2390 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2391 start
, this->shnum() - 1);
2394 // Set up some symbols.
2396 template<int size
, bool big_endian
>
2398 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2399 Symbol_table
* symtab
,
2404 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2405 // undefined when scanning relocs (and thus requires
2406 // non-relative dynamic relocs). The proper value will be
2408 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2409 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2411 Target_powerpc
<size
, big_endian
>* target
=
2412 static_cast<Target_powerpc
<size
, big_endian
>*>(
2413 parameters
->sized_target
<size
, big_endian
>());
2414 Output_data_got_powerpc
<size
, big_endian
>* got
2415 = target
->got_section(symtab
, layout
);
2416 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2417 Symbol_table::PREDEFINED
,
2421 elfcpp::STV_HIDDEN
, 0,
2425 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2426 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2427 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2429 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2431 = layout
->add_output_section_data(".sdata", 0,
2433 | elfcpp::SHF_WRITE
,
2434 sdata
, ORDER_SMALL_DATA
, false);
2435 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2436 Symbol_table::PREDEFINED
,
2437 os
, 32768, 0, elfcpp::STT_OBJECT
,
2438 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2444 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2445 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2446 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2448 Target_powerpc
<size
, big_endian
>* target
=
2449 static_cast<Target_powerpc
<size
, big_endian
>*>(
2450 parameters
->sized_target
<size
, big_endian
>());
2451 Output_data_got_powerpc
<size
, big_endian
>* got
2452 = target
->got_section(symtab
, layout
);
2453 symtab
->define_in_output_data(".TOC.", NULL
,
2454 Symbol_table::PREDEFINED
,
2458 elfcpp::STV_HIDDEN
, 0,
2464 // Set up PowerPC target specific relobj.
2466 template<int size
, bool big_endian
>
2468 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2469 const std::string
& name
,
2470 Input_file
* input_file
,
2471 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2473 int et
= ehdr
.get_e_type();
2474 // ET_EXEC files are valid input for --just-symbols/-R,
2475 // and we treat them as relocatable objects.
2476 if (et
== elfcpp::ET_REL
2477 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2479 Powerpc_relobj
<size
, big_endian
>* obj
=
2480 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2484 else if (et
== elfcpp::ET_DYN
)
2486 Powerpc_dynobj
<size
, big_endian
>* obj
=
2487 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2493 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2498 template<int size
, bool big_endian
>
2499 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2502 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2503 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2505 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2506 : Output_data_got
<size
, big_endian
>(),
2507 symtab_(symtab
), layout_(layout
),
2508 header_ent_cnt_(size
== 32 ? 3 : 1),
2509 header_index_(size
== 32 ? 0x2000 : 0)
2512 this->set_addralign(256);
2515 // Override all the Output_data_got methods we use so as to first call
2518 add_global(Symbol
* gsym
, unsigned int got_type
)
2520 this->reserve_ent();
2521 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2525 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2527 this->reserve_ent();
2528 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2532 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2533 { return this->add_global_plt(gsym
, got_type
); }
2536 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2537 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2539 this->reserve_ent();
2540 Output_data_got
<size
, big_endian
>::
2541 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2545 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2546 Output_data_reloc_generic
* rel_dyn
,
2547 unsigned int r_type_1
, unsigned int r_type_2
)
2549 if (gsym
->has_got_offset(got_type
))
2552 this->reserve_ent(2);
2553 Output_data_got
<size
, big_endian
>::
2554 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2558 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2560 this->reserve_ent();
2561 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2566 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2568 this->reserve_ent();
2569 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2574 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2575 { return this->add_local_plt(object
, sym_index
, got_type
); }
2578 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2579 unsigned int got_type
,
2580 Output_data_reloc_generic
* rel_dyn
,
2581 unsigned int r_type
)
2583 if (object
->local_has_got_offset(sym_index
, got_type
))
2586 this->reserve_ent(2);
2587 Output_data_got
<size
, big_endian
>::
2588 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2592 add_constant(Valtype constant
)
2594 this->reserve_ent();
2595 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2599 add_constant_pair(Valtype c1
, Valtype c2
)
2601 this->reserve_ent(2);
2602 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2605 // Offset of _GLOBAL_OFFSET_TABLE_.
2609 return this->got_offset(this->header_index_
);
2612 // Offset of base used to access the GOT/TOC.
2613 // The got/toc pointer reg will be set to this value.
2615 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2618 return this->g_o_t();
2620 return (this->output_section()->address()
2621 + object
->toc_base_offset()
2625 // Ensure our GOT has a header.
2627 set_final_data_size()
2629 if (this->header_ent_cnt_
!= 0)
2630 this->make_header();
2631 Output_data_got
<size
, big_endian
>::set_final_data_size();
2634 // First word of GOT header needs some values that are not
2635 // handled by Output_data_got so poke them in here.
2636 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2638 do_write(Output_file
* of
)
2641 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2642 val
= this->layout_
->dynamic_section()->address();
2644 val
= this->output_section()->address() + 0x8000;
2645 this->replace_constant(this->header_index_
, val
);
2646 Output_data_got
<size
, big_endian
>::do_write(of
);
2651 reserve_ent(unsigned int cnt
= 1)
2653 if (this->header_ent_cnt_
== 0)
2655 if (this->num_entries() + cnt
> this->header_index_
)
2656 this->make_header();
2662 this->header_ent_cnt_
= 0;
2663 this->header_index_
= this->num_entries();
2666 Output_data_got
<size
, big_endian
>::add_constant(0);
2667 Output_data_got
<size
, big_endian
>::add_constant(0);
2668 Output_data_got
<size
, big_endian
>::add_constant(0);
2670 // Define _GLOBAL_OFFSET_TABLE_ at the header
2671 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2674 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2675 sym
->set_value(this->g_o_t());
2678 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2679 Symbol_table::PREDEFINED
,
2680 this, this->g_o_t(), 0,
2683 elfcpp::STV_HIDDEN
, 0,
2687 Output_data_got
<size
, big_endian
>::add_constant(0);
2690 // Stashed pointers.
2691 Symbol_table
* symtab_
;
2695 unsigned int header_ent_cnt_
;
2696 // GOT header index.
2697 unsigned int header_index_
;
2700 // Get the GOT section, creating it if necessary.
2702 template<int size
, bool big_endian
>
2703 Output_data_got_powerpc
<size
, big_endian
>*
2704 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2707 if (this->got_
== NULL
)
2709 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2712 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2714 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2715 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2716 this->got_
, ORDER_DATA
, false);
2722 // Get the dynamic reloc section, creating it if necessary.
2724 template<int size
, bool big_endian
>
2725 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2726 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2728 if (this->rela_dyn_
== NULL
)
2730 gold_assert(layout
!= NULL
);
2731 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2732 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2733 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2734 ORDER_DYNAMIC_RELOCS
, false);
2736 return this->rela_dyn_
;
2739 // Similarly, but for ifunc symbols get the one for ifunc.
2741 template<int size
, bool big_endian
>
2742 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2743 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2748 return this->rela_dyn_section(layout
);
2750 if (this->iplt_
== NULL
)
2751 this->make_iplt_section(symtab
, layout
);
2752 return this->iplt_
->rel_plt();
2758 // Determine the stub group size. The group size is the absolute
2759 // value of the parameter --stub-group-size. If --stub-group-size
2760 // is passed a negative value, we restrict stubs to be always after
2761 // the stubbed branches.
2762 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2763 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2764 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2765 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2766 owner_(NULL
), output_section_(NULL
)
2770 // Return true iff input section can be handled by current stub
2773 can_add_to_stub_group(Output_section
* o
,
2774 const Output_section::Input_section
* i
,
2777 const Output_section::Input_section
*
2783 { return output_section_
; }
2786 set_output_and_owner(Output_section
* o
,
2787 const Output_section::Input_section
* i
)
2789 this->output_section_
= o
;
2798 // Adding group sections before the stubs.
2799 FINDING_STUB_SECTION
,
2800 // Adding group sections after the stubs.
2804 uint32_t stub_group_size_
;
2805 bool stubs_always_after_branch_
;
2806 bool suppress_size_errors_
;
2807 // True if a stub group can serve multiple output sections.
2810 // Current max size of group. Starts at stub_group_size_ but is
2811 // reduced to stub_group_size_/1024 on seeing a section with
2812 // external conditional branches.
2813 uint32_t group_size_
;
2814 uint64_t group_start_addr_
;
2815 // owner_ and output_section_ specify the section to which stubs are
2816 // attached. The stubs are placed at the end of this section.
2817 const Output_section::Input_section
* owner_
;
2818 Output_section
* output_section_
;
2821 // Return true iff input section can be handled by current stub
2822 // group. Sections are presented to this function in order,
2823 // so the first section is the head of the group.
2826 Stub_control::can_add_to_stub_group(Output_section
* o
,
2827 const Output_section::Input_section
* i
,
2830 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2832 uint64_t start_addr
= o
->address();
2835 // .init and .fini sections are pasted together to form a single
2836 // function. We can't be adding stubs in the middle of the function.
2837 this_size
= o
->data_size();
2840 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2841 this_size
= i
->data_size();
2844 uint64_t end_addr
= start_addr
+ this_size
;
2845 uint32_t group_size
= this->stub_group_size_
;
2847 this->group_size_
= group_size
= group_size
>> 10;
2849 if (this_size
> group_size
&& !this->suppress_size_errors_
)
2850 gold_warning(_("%s:%s exceeds group size"),
2851 i
->relobj()->name().c_str(),
2852 i
->relobj()->section_name(i
->shndx()).c_str());
2854 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
2855 has14
? " 14bit" : "",
2856 i
->relobj()->name().c_str(),
2857 i
->relobj()->section_name(i
->shndx()).c_str(),
2858 (long long) this_size
,
2859 (this->state_
== NO_GROUP
2861 : (long long) end_addr
- this->group_start_addr_
));
2863 if (this->state_
== NO_GROUP
)
2865 // Only here on very first use of Stub_control
2867 this->output_section_
= o
;
2868 this->state_
= FINDING_STUB_SECTION
;
2869 this->group_size_
= group_size
;
2870 this->group_start_addr_
= start_addr
;
2873 else if (!this->multi_os_
&& this->output_section_
!= o
)
2875 else if (this->state_
== HAS_STUB_SECTION
)
2877 // Can we add this section, which is after the stubs, to the
2879 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
2882 else if (this->state_
== FINDING_STUB_SECTION
)
2884 if ((whole_sec
&& this->output_section_
== o
)
2885 || end_addr
- this->group_start_addr_
<= this->group_size_
)
2887 // Stubs are added at the end of "owner_".
2889 this->output_section_
= o
;
2892 // The group before the stubs has reached maximum size.
2893 // Now see about adding sections after the stubs to the
2894 // group. If the current section has a 14-bit branch and
2895 // the group before the stubs exceeds group_size_ (because
2896 // they didn't have 14-bit branches), don't add sections
2897 // after the stubs: The size of stubs for such a large
2898 // group may exceed the reach of a 14-bit branch.
2899 if (!this->stubs_always_after_branch_
2900 && this_size
<= this->group_size_
2901 && start_addr
- this->group_start_addr_
<= this->group_size_
)
2903 gold_debug(DEBUG_TARGET
, "adding after stubs");
2904 this->state_
= HAS_STUB_SECTION
;
2905 this->group_start_addr_
= start_addr
;
2912 gold_debug(DEBUG_TARGET
,
2913 !this->multi_os_
&& this->output_section_
!= o
2914 ? "nope, new output section\n"
2915 : "nope, didn't fit\n");
2917 // The section fails to fit in the current group. Set up a few
2918 // things for the next group. owner_ and output_section_ will be
2919 // set later after we've retrieved those values for the current
2921 this->state_
= FINDING_STUB_SECTION
;
2922 this->group_size_
= group_size
;
2923 this->group_start_addr_
= start_addr
;
2927 // Look over all the input sections, deciding where to place stubs.
2929 template<int size
, bool big_endian
>
2931 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2933 bool no_size_errors
)
2935 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
2936 parameters
->options().stub_group_multi());
2938 // Group input sections and insert stub table
2939 Stub_table_owner
* table_owner
= NULL
;
2940 std::vector
<Stub_table_owner
*> tables
;
2941 Layout::Section_list section_list
;
2942 layout
->get_executable_sections(§ion_list
);
2943 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2944 for (Layout::Section_list::iterator o
= section_list
.begin();
2945 o
!= section_list
.end();
2948 typedef Output_section::Input_section_list Input_section_list
;
2949 for (Input_section_list::const_iterator i
2950 = (*o
)->input_sections().begin();
2951 i
!= (*o
)->input_sections().end();
2954 if (i
->is_input_section()
2955 || i
->is_relaxed_input_section())
2957 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2958 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2959 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2960 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2962 table_owner
->output_section
= stub_control
.output_section();
2963 table_owner
->owner
= stub_control
.owner();
2964 stub_control
.set_output_and_owner(*o
, &*i
);
2967 if (table_owner
== NULL
)
2969 table_owner
= new Stub_table_owner
;
2970 tables
.push_back(table_owner
);
2972 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2976 if (table_owner
!= NULL
)
2978 table_owner
->output_section
= stub_control
.output_section();
2979 table_owner
->owner
= stub_control
.owner();;
2981 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2985 Stub_table
<size
, big_endian
>* stub_table
;
2987 if ((*t
)->owner
->is_input_section())
2988 stub_table
= new Stub_table
<size
, big_endian
>(this,
2989 (*t
)->output_section
,
2991 this->stub_tables_
.size());
2992 else if ((*t
)->owner
->is_relaxed_input_section())
2993 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2994 (*t
)->owner
->relaxed_input_section());
2997 this->stub_tables_
.push_back(stub_table
);
3002 static unsigned long
3003 max_branch_delta (unsigned int r_type
)
3005 if (r_type
== elfcpp::R_POWERPC_REL14
3006 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
3007 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
3009 if (r_type
== elfcpp::R_POWERPC_REL24
3010 || r_type
== elfcpp::R_PPC_PLTREL24
3011 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
3016 // Return whether this branch is going via a plt call stub.
3018 template<int size
, bool big_endian
>
3020 Target_powerpc
<size
, big_endian
>::Branch_info::mark_pltcall(
3021 Powerpc_relobj
<size
, big_endian
>* ppc_object
,
3024 Target_powerpc
* target
,
3025 Symbol_table
* symtab
)
3027 if (this->object_
!= ppc_object
3028 || this->shndx_
!= shndx
3029 || this->offset_
!= offset
)
3032 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3033 if (sym
!= NULL
&& sym
->is_forwarder())
3034 sym
= symtab
->resolve_forwards(sym
);
3035 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3037 ? (gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3038 && !target
->is_elfv2_localentry0(gsym
))
3039 : (this->object_
->local_has_plt_offset(this->r_sym_
)
3040 && !target
->is_elfv2_localentry0(this->object_
, this->r_sym_
)))
3048 // If this branch needs a plt call stub, or a long branch stub, make one.
3050 template<int size
, bool big_endian
>
3052 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
3053 Stub_table
<size
, big_endian
>* stub_table
,
3054 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
3055 Symbol_table
* symtab
) const
3057 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3058 if (sym
!= NULL
&& sym
->is_forwarder())
3059 sym
= symtab
->resolve_forwards(sym
);
3060 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3061 Target_powerpc
<size
, big_endian
>* target
=
3062 static_cast<Target_powerpc
<size
, big_endian
>*>(
3063 parameters
->sized_target
<size
, big_endian
>());
3067 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3068 : this->object_
->local_has_plt_offset(this->r_sym_
))
3072 && target
->abiversion() >= 2
3073 && !parameters
->options().output_is_position_independent()
3074 && !is_branch_reloc(this->r_type_
))
3075 target
->glink_section()->add_global_entry(gsym
);
3078 if (stub_table
== NULL
)
3079 stub_table
= this->object_
->stub_table(this->shndx_
);
3080 if (stub_table
== NULL
)
3082 // This is a ref from a data section to an ifunc symbol.
3083 stub_table
= ifunc_stub_table
;
3085 gold_assert(stub_table
!= NULL
);
3086 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3087 if (from
!= invalid_address
)
3088 from
+= (this->object_
->output_section(this->shndx_
)->address()
3091 ok
= stub_table
->add_plt_call_entry(from
,
3092 this->object_
, gsym
,
3093 this->r_type_
, this->addend_
,
3096 ok
= stub_table
->add_plt_call_entry(from
,
3097 this->object_
, this->r_sym_
,
3098 this->r_type_
, this->addend_
,
3104 Address max_branch_offset
= max_branch_delta(this->r_type_
);
3105 if (max_branch_offset
== 0)
3107 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3108 gold_assert(from
!= invalid_address
);
3109 from
+= (this->object_
->output_section(this->shndx_
)->address()
3114 switch (gsym
->source())
3116 case Symbol::FROM_OBJECT
:
3118 Object
* symobj
= gsym
->object();
3119 if (symobj
->is_dynamic()
3120 || symobj
->pluginobj() != NULL
)
3123 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
3124 if (shndx
== elfcpp::SHN_UNDEF
)
3129 case Symbol::IS_UNDEFINED
:
3135 Symbol_table::Compute_final_value_status status
;
3136 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
3137 if (status
!= Symbol_table::CFVS_OK
)
3140 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
3144 const Symbol_value
<size
>* psymval
3145 = this->object_
->local_symbol(this->r_sym_
);
3146 Symbol_value
<size
> symval
;
3147 if (psymval
->is_section_symbol())
3148 symval
.set_is_section_symbol();
3149 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
3150 typename
ObjType::Compute_final_local_value_status status
3151 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
3153 if (status
!= ObjType::CFLV_OK
3154 || !symval
.has_output_value())
3156 to
= symval
.value(this->object_
, 0);
3158 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
3160 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
3161 to
+= this->addend_
;
3162 if (stub_table
== NULL
)
3163 stub_table
= this->object_
->stub_table(this->shndx_
);
3164 if (size
== 64 && target
->abiversion() < 2)
3166 unsigned int dest_shndx
;
3167 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
3171 Address delta
= to
- from
;
3172 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
3174 if (stub_table
== NULL
)
3176 gold_warning(_("%s:%s: branch in non-executable section,"
3177 " no long branch stub for you"),
3178 this->object_
->name().c_str(),
3179 this->object_
->section_name(this->shndx_
).c_str());
3182 bool save_res
= (size
== 64
3184 && gsym
->source() == Symbol::IN_OUTPUT_DATA
3185 && gsym
->output_data() == target
->savres_section());
3186 ok
= stub_table
->add_long_branch_entry(this->object_
,
3188 from
, to
, save_res
);
3192 gold_debug(DEBUG_TARGET
,
3193 "branch at %s:%s+%#lx\n"
3194 "can't reach stub attached to %s:%s",
3195 this->object_
->name().c_str(),
3196 this->object_
->section_name(this->shndx_
).c_str(),
3197 (unsigned long) this->offset_
,
3198 stub_table
->relobj()->name().c_str(),
3199 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3204 // Relaxation hook. This is where we do stub generation.
3206 template<int size
, bool big_endian
>
3208 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3209 const Input_objects
*,
3210 Symbol_table
* symtab
,
3214 unsigned int prev_brlt_size
= 0;
3218 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3220 && this->abiversion() < 2
3222 && !parameters
->options().user_set_plt_thread_safe())
3224 static const char* const thread_starter
[] =
3228 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3230 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3231 "mq_notify", "create_timer",
3236 "GOMP_parallel_start",
3237 "GOMP_parallel_loop_static",
3238 "GOMP_parallel_loop_static_start",
3239 "GOMP_parallel_loop_dynamic",
3240 "GOMP_parallel_loop_dynamic_start",
3241 "GOMP_parallel_loop_guided",
3242 "GOMP_parallel_loop_guided_start",
3243 "GOMP_parallel_loop_runtime",
3244 "GOMP_parallel_loop_runtime_start",
3245 "GOMP_parallel_sections",
3246 "GOMP_parallel_sections_start",
3251 if (parameters
->options().shared())
3255 for (unsigned int i
= 0;
3256 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3259 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3260 thread_safe
= (sym
!= NULL
3262 && sym
->in_real_elf());
3268 this->plt_thread_safe_
= thread_safe
;
3273 this->stub_group_size_
= parameters
->options().stub_group_size();
3274 bool no_size_errors
= true;
3275 if (this->stub_group_size_
== 1)
3276 this->stub_group_size_
= 0x1c00000;
3277 else if (this->stub_group_size_
== -1)
3278 this->stub_group_size_
= -0x1e00000;
3280 no_size_errors
= false;
3281 this->group_sections(layout
, task
, no_size_errors
);
3283 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3285 this->branch_lookup_table_
.clear();
3286 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3287 p
!= this->stub_tables_
.end();
3290 (*p
)->clear_stubs(true);
3292 this->stub_tables_
.clear();
3293 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3294 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3295 program_name
, this->stub_group_size_
);
3296 this->group_sections(layout
, task
, true);
3299 // We need address of stub tables valid for make_stub.
3300 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3301 p
!= this->stub_tables_
.end();
3304 const Powerpc_relobj
<size
, big_endian
>* object
3305 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3306 Address off
= object
->get_output_section_offset((*p
)->shndx());
3307 gold_assert(off
!= invalid_address
);
3308 Output_section
* os
= (*p
)->output_section();
3309 (*p
)->set_address_and_size(os
, off
);
3314 // Clear plt call stubs, long branch stubs and branch lookup table.
3315 prev_brlt_size
= this->branch_lookup_table_
.size();
3316 this->branch_lookup_table_
.clear();
3317 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3318 p
!= this->stub_tables_
.end();
3321 (*p
)->clear_stubs(false);
3325 // Build all the stubs.
3326 this->relax_failed_
= false;
3327 Stub_table
<size
, big_endian
>* ifunc_stub_table
3328 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3329 Stub_table
<size
, big_endian
>* one_stub_table
3330 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3331 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3332 b
!= this->branch_info_
.end();
3335 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3336 && !this->relax_failed_
)
3338 this->relax_failed_
= true;
3339 this->relax_fail_count_
++;
3340 if (this->relax_fail_count_
< 3)
3345 // Did anything change size?
3346 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3347 bool again
= num_huge_branches
!= prev_brlt_size
;
3348 if (size
== 64 && num_huge_branches
!= 0)
3349 this->make_brlt_section(layout
);
3350 if (size
== 64 && again
)
3351 this->brlt_section_
->set_current_size(num_huge_branches
);
3353 for (typename
Stub_tables::reverse_iterator p
= this->stub_tables_
.rbegin();
3354 p
!= this->stub_tables_
.rend();
3356 (*p
)->remove_eh_frame(layout
);
3358 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3359 p
!= this->stub_tables_
.end();
3361 (*p
)->add_eh_frame(layout
);
3363 typedef Unordered_set
<Output_section
*> Output_sections
;
3364 Output_sections os_need_update
;
3365 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3366 p
!= this->stub_tables_
.end();
3369 if ((*p
)->size_update())
3372 os_need_update
.insert((*p
)->output_section());
3376 // Set output section offsets for all input sections in an output
3377 // section that just changed size. Anything past the stubs will
3379 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3380 p
!= os_need_update
.end();
3383 Output_section
* os
= *p
;
3385 typedef Output_section::Input_section_list Input_section_list
;
3386 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3387 i
!= os
->input_sections().end();
3390 off
= align_address(off
, i
->addralign());
3391 if (i
->is_input_section() || i
->is_relaxed_input_section())
3392 i
->relobj()->set_section_offset(i
->shndx(), off
);
3393 if (i
->is_relaxed_input_section())
3395 Stub_table
<size
, big_endian
>* stub_table
3396 = static_cast<Stub_table
<size
, big_endian
>*>(
3397 i
->relaxed_input_section());
3398 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3399 off
+= stub_table_size
;
3400 // After a few iterations, set current stub table size
3401 // as min size threshold, so later stub tables can only
3404 stub_table
->set_min_size_threshold(stub_table_size
);
3407 off
+= i
->data_size();
3409 // If .branch_lt is part of this output section, then we have
3410 // just done the offset adjustment.
3411 os
->clear_section_offsets_need_adjustment();
3416 && num_huge_branches
!= 0
3417 && parameters
->options().output_is_position_independent())
3419 // Fill in the BRLT relocs.
3420 this->brlt_section_
->reset_brlt_sizes();
3421 for (typename
Branch_lookup_table::const_iterator p
3422 = this->branch_lookup_table_
.begin();
3423 p
!= this->branch_lookup_table_
.end();
3426 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3428 this->brlt_section_
->finalize_brlt_sizes();
3432 && (parameters
->options().user_set_emit_stub_syms()
3433 ? parameters
->options().emit_stub_syms()
3435 || parameters
->options().output_is_position_independent()
3436 || parameters
->options().emit_relocs())))
3438 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3439 p
!= this->stub_tables_
.end();
3441 (*p
)->define_stub_syms(symtab
);
3443 if (this->glink_
!= NULL
)
3445 int stub_size
= this->glink_
->pltresolve_size
;
3446 Address value
= -stub_size
;
3452 this->define_local(symtab
, "__glink_PLTresolve",
3453 this->glink_
, value
, stub_size
);
3456 this->define_local(symtab
, "__glink", this->glink_
, 0, 0);
3463 template<int size
, bool big_endian
>
3465 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3466 unsigned char* oview
,
3470 uint64_t address
= plt
->address();
3471 off_t len
= plt
->data_size();
3473 if (plt
== this->glink_
)
3475 // See Output_data_glink::do_write() for glink contents.
3478 gold_assert(parameters
->doing_static_link());
3479 // Static linking may need stubs, to support ifunc and long
3480 // branches. We need to create an output section for
3481 // .eh_frame early in the link process, to have a place to
3482 // attach stub .eh_frame info. We also need to have
3483 // registered a CIE that matches the stub CIE. Both of
3484 // these requirements are satisfied by creating an FDE and
3485 // CIE for .glink, even though static linking will leave
3486 // .glink zero length.
3487 // ??? Hopefully generating an FDE with a zero address range
3488 // won't confuse anything that consumes .eh_frame info.
3490 else if (size
== 64)
3492 // There is one word before __glink_PLTresolve
3496 else if (parameters
->options().output_is_position_independent())
3498 // There are two FDEs for a position independent glink.
3499 // The first covers the branch table, the second
3500 // __glink_PLTresolve at the end of glink.
3501 off_t resolve_size
= this->glink_
->pltresolve_size
;
3502 if (oview
[9] == elfcpp::DW_CFA_nop
)
3503 len
-= resolve_size
;
3506 address
+= len
- resolve_size
;
3513 // Must be a stub table.
3514 const Stub_table
<size
, big_endian
>* stub_table
3515 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3516 uint64_t stub_address
= stub_table
->stub_address();
3517 len
-= stub_address
- address
;
3518 address
= stub_address
;
3521 *paddress
= address
;
3525 // A class to handle the PLT data.
3527 template<int size
, bool big_endian
>
3528 class Output_data_plt_powerpc
: public Output_section_data_build
3531 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3532 size
, big_endian
> Reloc_section
;
3534 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3535 Reloc_section
* plt_rel
,
3537 : Output_section_data_build(size
== 32 ? 4 : 8),
3543 // Add an entry to the PLT.
3548 add_ifunc_entry(Symbol
*);
3551 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3553 // Return the .rela.plt section data.
3560 // Return the number of PLT entries.
3564 if (this->current_data_size() == 0)
3566 return ((this->current_data_size() - this->first_plt_entry_offset())
3567 / this->plt_entry_size());
3572 do_adjust_output_section(Output_section
* os
)
3577 // Write to a map file.
3579 do_print_to_mapfile(Mapfile
* mapfile
) const
3580 { mapfile
->print_output_data(this, this->name_
); }
3583 // Return the offset of the first non-reserved PLT entry.
3585 first_plt_entry_offset() const
3587 // IPLT has no reserved entry.
3588 if (this->name_
[3] == 'I')
3590 return this->targ_
->first_plt_entry_offset();
3593 // Return the size of each PLT entry.
3595 plt_entry_size() const
3597 return this->targ_
->plt_entry_size();
3600 // Write out the PLT data.
3602 do_write(Output_file
*);
3604 // The reloc section.
3605 Reloc_section
* rel_
;
3606 // Allows access to .glink for do_write.
3607 Target_powerpc
<size
, big_endian
>* targ_
;
3608 // What to report in map file.
3612 // Add an entry to the PLT.
3614 template<int size
, bool big_endian
>
3616 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3618 if (!gsym
->has_plt_offset())
3620 section_size_type off
= this->current_data_size();
3622 off
+= this->first_plt_entry_offset();
3623 gsym
->set_plt_offset(off
);
3624 gsym
->set_needs_dynsym_entry();
3625 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3626 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3627 off
+= this->plt_entry_size();
3628 this->set_current_data_size(off
);
3632 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3634 template<int size
, bool big_endian
>
3636 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3638 if (!gsym
->has_plt_offset())
3640 section_size_type off
= this->current_data_size();
3641 gsym
->set_plt_offset(off
);
3642 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3643 if (size
== 64 && this->targ_
->abiversion() < 2)
3644 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3645 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3646 off
+= this->plt_entry_size();
3647 this->set_current_data_size(off
);
3651 // Add an entry for a local ifunc symbol to the IPLT.
3653 template<int size
, bool big_endian
>
3655 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3656 Sized_relobj_file
<size
, big_endian
>* relobj
,
3657 unsigned int local_sym_index
)
3659 if (!relobj
->local_has_plt_offset(local_sym_index
))
3661 section_size_type off
= this->current_data_size();
3662 relobj
->set_local_plt_offset(local_sym_index
, off
);
3663 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3664 if (size
== 64 && this->targ_
->abiversion() < 2)
3665 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3666 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3668 off
+= this->plt_entry_size();
3669 this->set_current_data_size(off
);
3673 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3674 static const uint32_t add_2_2_11
= 0x7c425a14;
3675 static const uint32_t add_2_2_12
= 0x7c426214;
3676 static const uint32_t add_3_3_2
= 0x7c631214;
3677 static const uint32_t add_3_3_13
= 0x7c636a14;
3678 static const uint32_t add_11_0_11
= 0x7d605a14;
3679 static const uint32_t add_11_2_11
= 0x7d625a14;
3680 static const uint32_t add_11_11_2
= 0x7d6b1214;
3681 static const uint32_t addi_0_12
= 0x380c0000;
3682 static const uint32_t addi_2_2
= 0x38420000;
3683 static const uint32_t addi_3_3
= 0x38630000;
3684 static const uint32_t addi_11_11
= 0x396b0000;
3685 static const uint32_t addi_12_1
= 0x39810000;
3686 static const uint32_t addi_12_12
= 0x398c0000;
3687 static const uint32_t addis_0_2
= 0x3c020000;
3688 static const uint32_t addis_0_13
= 0x3c0d0000;
3689 static const uint32_t addis_2_12
= 0x3c4c0000;
3690 static const uint32_t addis_11_2
= 0x3d620000;
3691 static const uint32_t addis_11_11
= 0x3d6b0000;
3692 static const uint32_t addis_11_30
= 0x3d7e0000;
3693 static const uint32_t addis_12_1
= 0x3d810000;
3694 static const uint32_t addis_12_2
= 0x3d820000;
3695 static const uint32_t addis_12_12
= 0x3d8c0000;
3696 static const uint32_t b
= 0x48000000;
3697 static const uint32_t bcl_20_31
= 0x429f0005;
3698 static const uint32_t bctr
= 0x4e800420;
3699 static const uint32_t blr
= 0x4e800020;
3700 static const uint32_t bnectr_p4
= 0x4ce20420;
3701 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3702 static const uint32_t cmpldi_2_0
= 0x28220000;
3703 static const uint32_t cror_15_15_15
= 0x4def7b82;
3704 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3705 static const uint32_t ld_0_1
= 0xe8010000;
3706 static const uint32_t ld_0_12
= 0xe80c0000;
3707 static const uint32_t ld_2_1
= 0xe8410000;
3708 static const uint32_t ld_2_2
= 0xe8420000;
3709 static const uint32_t ld_2_11
= 0xe84b0000;
3710 static const uint32_t ld_2_12
= 0xe84c0000;
3711 static const uint32_t ld_11_2
= 0xe9620000;
3712 static const uint32_t ld_11_11
= 0xe96b0000;
3713 static const uint32_t ld_12_2
= 0xe9820000;
3714 static const uint32_t ld_12_11
= 0xe98b0000;
3715 static const uint32_t ld_12_12
= 0xe98c0000;
3716 static const uint32_t lfd_0_1
= 0xc8010000;
3717 static const uint32_t li_0_0
= 0x38000000;
3718 static const uint32_t li_12_0
= 0x39800000;
3719 static const uint32_t lis_0
= 0x3c000000;
3720 static const uint32_t lis_2
= 0x3c400000;
3721 static const uint32_t lis_11
= 0x3d600000;
3722 static const uint32_t lis_12
= 0x3d800000;
3723 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3724 static const uint32_t lwz_0_12
= 0x800c0000;
3725 static const uint32_t lwz_11_11
= 0x816b0000;
3726 static const uint32_t lwz_11_30
= 0x817e0000;
3727 static const uint32_t lwz_12_12
= 0x818c0000;
3728 static const uint32_t lwzu_0_12
= 0x840c0000;
3729 static const uint32_t mflr_0
= 0x7c0802a6;
3730 static const uint32_t mflr_11
= 0x7d6802a6;
3731 static const uint32_t mflr_12
= 0x7d8802a6;
3732 static const uint32_t mtctr_0
= 0x7c0903a6;
3733 static const uint32_t mtctr_11
= 0x7d6903a6;
3734 static const uint32_t mtctr_12
= 0x7d8903a6;
3735 static const uint32_t mtlr_0
= 0x7c0803a6;
3736 static const uint32_t mtlr_12
= 0x7d8803a6;
3737 static const uint32_t nop
= 0x60000000;
3738 static const uint32_t ori_0_0_0
= 0x60000000;
3739 static const uint32_t srdi_0_0_2
= 0x7800f082;
3740 static const uint32_t std_0_1
= 0xf8010000;
3741 static const uint32_t std_0_12
= 0xf80c0000;
3742 static const uint32_t std_2_1
= 0xf8410000;
3743 static const uint32_t stfd_0_1
= 0xd8010000;
3744 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3745 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3746 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3747 static const uint32_t xor_2_12_12
= 0x7d826278;
3748 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3750 // Write out the PLT.
3752 template<int size
, bool big_endian
>
3754 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3756 if (size
== 32 && this->name_
[3] != 'I')
3758 const section_size_type offset
= this->offset();
3759 const section_size_type oview_size
3760 = convert_to_section_size_type(this->data_size());
3761 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3762 unsigned char* pov
= oview
;
3763 unsigned char* endpov
= oview
+ oview_size
;
3765 // The address of the .glink branch table
3766 const Output_data_glink
<size
, big_endian
>* glink
3767 = this->targ_
->glink_section();
3768 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3770 while (pov
< endpov
)
3772 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3777 of
->write_output_view(offset
, oview_size
, oview
);
3781 // Create the PLT section.
3783 template<int size
, bool big_endian
>
3785 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3788 if (this->plt_
== NULL
)
3790 if (this->got_
== NULL
)
3791 this->got_section(symtab
, layout
);
3793 if (this->glink_
== NULL
)
3794 make_glink_section(layout
);
3796 // Ensure that .rela.dyn always appears before .rela.plt This is
3797 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3798 // needs to include .rela.plt in its range.
3799 this->rela_dyn_section(layout
);
3801 Reloc_section
* plt_rel
= new Reloc_section(false);
3802 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3803 elfcpp::SHF_ALLOC
, plt_rel
,
3804 ORDER_DYNAMIC_PLT_RELOCS
, false);
3806 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3808 layout
->add_output_section_data(".plt",
3810 ? elfcpp::SHT_PROGBITS
3811 : elfcpp::SHT_NOBITS
),
3812 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3819 Output_section
* rela_plt_os
= plt_rel
->output_section();
3820 rela_plt_os
->set_info_section(this->plt_
->output_section());
3824 // Create the IPLT section.
3826 template<int size
, bool big_endian
>
3828 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3831 if (this->iplt_
== NULL
)
3833 this->make_plt_section(symtab
, layout
);
3835 Reloc_section
* iplt_rel
= new Reloc_section(false);
3836 if (this->rela_dyn_
->output_section())
3837 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3839 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3841 if (this->plt_
->output_section())
3842 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3846 // A section for huge long branch addresses, similar to plt section.
3848 template<int size
, bool big_endian
>
3849 class Output_data_brlt_powerpc
: public Output_section_data_build
3852 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3853 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3854 size
, big_endian
> Reloc_section
;
3856 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3857 Reloc_section
* brlt_rel
)
3858 : Output_section_data_build(size
== 32 ? 4 : 8),
3866 this->reset_data_size();
3867 this->rel_
->reset_data_size();
3871 finalize_brlt_sizes()
3873 this->finalize_data_size();
3874 this->rel_
->finalize_data_size();
3877 // Add a reloc for an entry in the BRLT.
3879 add_reloc(Address to
, unsigned int off
)
3880 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3882 // Update section and reloc section size.
3884 set_current_size(unsigned int num_branches
)
3886 this->reset_address_and_file_offset();
3887 this->set_current_data_size(num_branches
* 16);
3888 this->finalize_data_size();
3889 Output_section
* os
= this->output_section();
3890 os
->set_section_offsets_need_adjustment();
3891 if (this->rel_
!= NULL
)
3893 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3894 this->rel_
->reset_address_and_file_offset();
3895 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3896 this->rel_
->finalize_data_size();
3897 Output_section
* os
= this->rel_
->output_section();
3898 os
->set_section_offsets_need_adjustment();
3904 do_adjust_output_section(Output_section
* os
)
3909 // Write to a map file.
3911 do_print_to_mapfile(Mapfile
* mapfile
) const
3912 { mapfile
->print_output_data(this, "** BRLT"); }
3915 // Write out the BRLT data.
3917 do_write(Output_file
*);
3919 // The reloc section.
3920 Reloc_section
* rel_
;
3921 Target_powerpc
<size
, big_endian
>* targ_
;
3924 // Make the branch lookup table section.
3926 template<int size
, bool big_endian
>
3928 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3930 if (size
== 64 && this->brlt_section_
== NULL
)
3932 Reloc_section
* brlt_rel
= NULL
;
3933 bool is_pic
= parameters
->options().output_is_position_independent();
3936 // When PIC we can't fill in .branch_lt (like .plt it can be
3937 // a bss style section) but must initialise at runtime via
3938 // dynamic relocations.
3939 this->rela_dyn_section(layout
);
3940 brlt_rel
= new Reloc_section(false);
3941 if (this->rela_dyn_
->output_section())
3942 this->rela_dyn_
->output_section()
3943 ->add_output_section_data(brlt_rel
);
3946 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3947 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
3948 this->plt_
->output_section()
3949 ->add_output_section_data(this->brlt_section_
);
3951 layout
->add_output_section_data(".branch_lt",
3952 (is_pic
? elfcpp::SHT_NOBITS
3953 : elfcpp::SHT_PROGBITS
),
3954 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3955 this->brlt_section_
,
3956 (is_pic
? ORDER_SMALL_BSS
3957 : ORDER_SMALL_DATA
),
3962 // Write out .branch_lt when non-PIC.
3964 template<int size
, bool big_endian
>
3966 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3968 if (size
== 64 && !parameters
->options().output_is_position_independent())
3970 const section_size_type offset
= this->offset();
3971 const section_size_type oview_size
3972 = convert_to_section_size_type(this->data_size());
3973 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3975 this->targ_
->write_branch_lookup_table(oview
);
3976 of
->write_output_view(offset
, oview_size
, oview
);
3980 static inline uint32_t
3986 static inline uint32_t
3992 static inline uint32_t
3995 return hi(a
+ 0x8000);
4001 static const unsigned char eh_frame_cie
[12];
4005 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
4008 'z', 'R', 0, // Augmentation string.
4009 4, // Code alignment.
4010 0x80 - size
/ 8 , // Data alignment.
4012 1, // Augmentation size.
4013 (elfcpp::DW_EH_PE_pcrel
4014 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
4015 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
4018 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
4019 static const unsigned char glink_eh_frame_fde_64v1
[] =
4021 0, 0, 0, 0, // Replaced with offset to .glink.
4022 0, 0, 0, 0, // Replaced with size of .glink.
4023 0, // Augmentation size.
4024 elfcpp::DW_CFA_advance_loc
+ 1,
4025 elfcpp::DW_CFA_register
, 65, 12,
4026 elfcpp::DW_CFA_advance_loc
+ 5,
4027 elfcpp::DW_CFA_restore_extended
, 65
4030 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
4031 static const unsigned char glink_eh_frame_fde_64v2
[] =
4033 0, 0, 0, 0, // Replaced with offset to .glink.
4034 0, 0, 0, 0, // Replaced with size of .glink.
4035 0, // Augmentation size.
4036 elfcpp::DW_CFA_advance_loc
+ 1,
4037 elfcpp::DW_CFA_register
, 65, 0,
4038 elfcpp::DW_CFA_advance_loc
+ 7,
4039 elfcpp::DW_CFA_restore_extended
, 65
4042 // Describe __glink_PLTresolve use of LR, 32-bit version.
4043 static const unsigned char glink_eh_frame_fde_32
[] =
4045 0, 0, 0, 0, // Replaced with offset to .glink.
4046 0, 0, 0, 0, // Replaced with size of .glink.
4047 0, // Augmentation size.
4048 elfcpp::DW_CFA_advance_loc
+ 2,
4049 elfcpp::DW_CFA_register
, 65, 0,
4050 elfcpp::DW_CFA_advance_loc
+ 4,
4051 elfcpp::DW_CFA_restore_extended
, 65
4054 static const unsigned char default_fde
[] =
4056 0, 0, 0, 0, // Replaced with offset to stubs.
4057 0, 0, 0, 0, // Replaced with size of stubs.
4058 0, // Augmentation size.
4059 elfcpp::DW_CFA_nop
, // Pad.
4064 template<bool big_endian
>
4066 write_insn(unsigned char* p
, uint32_t v
)
4068 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
4071 // Stub_table holds information about plt and long branch stubs.
4072 // Stubs are built in an area following some input section determined
4073 // by group_sections(). This input section is converted to a relaxed
4074 // input section allowing it to be resized to accommodate the stubs
4076 template<int size
, bool big_endian
>
4077 class Stub_table
: public Output_relaxed_input_section
4082 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4083 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4087 unsigned int indx_
: 30;
4088 unsigned int r2save_
: 1;
4089 unsigned int localentry0_
: 1;
4091 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4092 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4094 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4095 Output_section
* output_section
,
4096 const Output_section::Input_section
* owner
,
4098 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4100 ->section_addralign(owner
->shndx())),
4101 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4102 orig_data_size_(owner
->current_data_size()),
4103 plt_size_(0), last_plt_size_(0),
4104 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4105 eh_frame_added_(false), need_save_res_(false), uniq_(id
)
4107 this->set_output_section(output_section
);
4109 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4110 new_relaxed
.push_back(this);
4111 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4114 // Add a plt call stub.
4116 add_plt_call_entry(Address
,
4117 const Sized_relobj_file
<size
, big_endian
>*,
4124 add_plt_call_entry(Address
,
4125 const Sized_relobj_file
<size
, big_endian
>*,
4131 // Find a given plt call stub.
4133 find_plt_call_entry(const Symbol
*) const;
4136 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4137 unsigned int) const;
4140 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4146 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4151 // Add a long branch stub.
4153 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4154 unsigned int, Address
, Address
, bool);
4157 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4161 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4163 Address max_branch_offset
= max_branch_delta(r_type
);
4164 if (max_branch_offset
== 0)
4166 gold_assert(from
!= invalid_address
);
4167 Address loc
= off
+ this->stub_address();
4168 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4172 clear_stubs(bool all
)
4174 this->plt_call_stubs_
.clear();
4175 this->plt_size_
= 0;
4176 this->long_branch_stubs_
.clear();
4177 this->branch_size_
= 0;
4178 this->need_save_res_
= false;
4181 this->last_plt_size_
= 0;
4182 this->last_branch_size_
= 0;
4187 set_address_and_size(const Output_section
* os
, Address off
)
4189 Address start_off
= off
;
4190 off
+= this->orig_data_size_
;
4191 Address my_size
= this->plt_size_
+ this->branch_size_
;
4192 if (this->need_save_res_
)
4193 my_size
+= this->targ_
->savres_section()->data_size();
4195 off
= align_address(off
, this->stub_align());
4196 // Include original section size and alignment padding in size
4197 my_size
+= off
- start_off
;
4198 // Ensure new size is always larger than min size
4199 // threshold. Alignment requirement is included in "my_size", so
4200 // increase "my_size" does not invalidate alignment.
4201 if (my_size
< this->min_size_threshold_
)
4202 my_size
= this->min_size_threshold_
;
4203 this->reset_address_and_file_offset();
4204 this->set_current_data_size(my_size
);
4205 this->set_address_and_file_offset(os
->address() + start_off
,
4206 os
->offset() + start_off
);
4211 stub_address() const
4213 return align_address(this->address() + this->orig_data_size_
,
4214 this->stub_align());
4220 return align_address(this->offset() + this->orig_data_size_
,
4221 this->stub_align());
4226 { return this->plt_size_
; }
4229 set_min_size_threshold(Address min_size
)
4230 { this->min_size_threshold_
= min_size
; }
4233 define_stub_syms(Symbol_table
*);
4238 Output_section
* os
= this->output_section();
4239 if (os
->addralign() < this->stub_align())
4241 os
->set_addralign(this->stub_align());
4242 // FIXME: get rid of the insane checkpointing.
4243 // We can't increase alignment of the input section to which
4244 // stubs are attached; The input section may be .init which
4245 // is pasted together with other .init sections to form a
4246 // function. Aligning might insert zero padding resulting in
4247 // sigill. However we do need to increase alignment of the
4248 // output section so that the align_address() on offset in
4249 // set_address_and_size() adds the same padding as the
4250 // align_address() on address in stub_address().
4251 // What's more, we need this alignment for the layout done in
4252 // relaxation_loop_body() so that the output section starts at
4253 // a suitably aligned address.
4254 os
->checkpoint_set_addralign(this->stub_align());
4256 if (this->last_plt_size_
!= this->plt_size_
4257 || this->last_branch_size_
!= this->branch_size_
)
4259 this->last_plt_size_
= this->plt_size_
;
4260 this->last_branch_size_
= this->branch_size_
;
4266 // Add .eh_frame info for this stub section. Unlike other linker
4267 // generated .eh_frame this is added late in the link, because we
4268 // only want the .eh_frame info if this particular stub section is
4271 add_eh_frame(Layout
* layout
)
4273 if (!parameters
->options().ld_generated_unwind_info())
4276 // Since we add stub .eh_frame info late, it must be placed
4277 // after all other linker generated .eh_frame info so that
4278 // merge mapping need not be updated for input sections.
4279 // There is no provision to use a different CIE to that used
4281 if (!this->targ_
->has_glink())
4284 if (this->plt_size_
+ this->branch_size_
+ this->need_save_res_
== 0)
4287 layout
->add_eh_frame_for_plt(this,
4288 Eh_cie
<size
>::eh_frame_cie
,
4289 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4291 sizeof (default_fde
));
4292 this->eh_frame_added_
= true;
4296 remove_eh_frame(Layout
* layout
)
4298 if (this->eh_frame_added_
)
4300 layout
->remove_eh_frame_for_plt(this,
4301 Eh_cie
<size
>::eh_frame_cie
,
4302 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4304 sizeof (default_fde
));
4305 this->eh_frame_added_
= false;
4309 Target_powerpc
<size
, big_endian
>*
4315 class Plt_stub_key_hash
;
4316 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4317 Plt_stub_key_hash
> Plt_stub_entries
;
4318 class Branch_stub_ent
;
4319 class Branch_stub_ent_hash
;
4320 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4321 Branch_stub_ent_hash
> Branch_stub_entries
;
4323 // Alignment of stub section.
4329 unsigned int min_align
= 32;
4330 unsigned int user_align
= 1 << parameters
->options().plt_align();
4331 return std::max(user_align
, min_align
);
4334 // Return the plt offset for the given call stub.
4336 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4338 const Symbol
* gsym
= p
->first
.sym_
;
4341 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4342 && gsym
->can_use_relative_reloc(false));
4343 return gsym
->plt_offset();
4348 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4349 unsigned int local_sym_index
= p
->first
.locsym_
;
4350 return relobj
->local_plt_offset(local_sym_index
);
4354 // Size of a given plt call stub.
4356 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4362 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4364 plt_addr
+= this->targ_
->iplt_section()->address();
4366 plt_addr
+= this->targ_
->plt_section()->address();
4367 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4368 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4369 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4370 got_addr
+= ppcobj
->toc_base_offset();
4371 Address off
= plt_addr
- got_addr
;
4372 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4373 if (this->targ_
->abiversion() < 2)
4375 bool static_chain
= parameters
->options().plt_static_chain();
4376 bool thread_safe
= this->targ_
->plt_thread_safe();
4380 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4382 unsigned int align
= 1 << parameters
->options().plt_align();
4384 bytes
= (bytes
+ align
- 1) & -align
;
4388 // Return long branch stub size.
4390 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4392 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4393 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4395 if (size
== 64 || !parameters
->options().output_is_position_independent())
4402 do_write(Output_file
*);
4404 // Plt call stub keys.
4408 Plt_stub_key(const Symbol
* sym
)
4409 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4412 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4413 unsigned int locsym_index
)
4414 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4417 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4419 unsigned int r_type
,
4421 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4424 this->addend_
= addend
;
4425 else if (parameters
->options().output_is_position_independent()
4426 && r_type
== elfcpp::R_PPC_PLTREL24
)
4428 this->addend_
= addend
;
4429 if (this->addend_
>= 32768)
4430 this->object_
= object
;
4434 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4435 unsigned int locsym_index
,
4436 unsigned int r_type
,
4438 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4441 this->addend_
= addend
;
4442 else if (parameters
->options().output_is_position_independent()
4443 && r_type
== elfcpp::R_PPC_PLTREL24
)
4444 this->addend_
= addend
;
4447 bool operator==(const Plt_stub_key
& that
) const
4449 return (this->sym_
== that
.sym_
4450 && this->object_
== that
.object_
4451 && this->addend_
== that
.addend_
4452 && this->locsym_
== that
.locsym_
);
4456 const Sized_relobj_file
<size
, big_endian
>* object_
;
4457 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4458 unsigned int locsym_
;
4461 class Plt_stub_key_hash
4464 size_t operator()(const Plt_stub_key
& ent
) const
4466 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4467 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4473 // Long branch stub keys.
4474 class Branch_stub_ent
4477 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4478 Address to
, bool save_res
)
4479 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4482 toc_base_off_
= obj
->toc_base_offset();
4485 bool operator==(const Branch_stub_ent
& that
) const
4487 return (this->dest_
== that
.dest_
4489 || this->toc_base_off_
== that
.toc_base_off_
));
4493 unsigned int toc_base_off_
;
4497 class Branch_stub_ent_hash
4500 size_t operator()(const Branch_stub_ent
& ent
) const
4501 { return ent
.dest_
^ ent
.toc_base_off_
; }
4504 // In a sane world this would be a global.
4505 Target_powerpc
<size
, big_endian
>* targ_
;
4506 // Map sym/object/addend to stub offset.
4507 Plt_stub_entries plt_call_stubs_
;
4508 // Map destination address to stub offset.
4509 Branch_stub_entries long_branch_stubs_
;
4510 // size of input section
4511 section_size_type orig_data_size_
;
4513 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4514 // Some rare cases cause (PR/20529) fluctuation in stub table
4515 // size, which leads to an endless relax loop. This is to be fixed
4516 // by, after the first few iterations, allowing only increase of
4517 // stub table size. This variable sets the minimal possible size of
4518 // a stub table, it is zero for the first few iterations, then
4519 // increases monotonically.
4520 Address min_size_threshold_
;
4521 // Whether .eh_frame info has been created for this stub section.
4522 bool eh_frame_added_
;
4523 // Set if this stub group needs a copy of out-of-line register
4524 // save/restore functions.
4525 bool need_save_res_
;
4526 // Per stub table unique identifier.
4530 // Add a plt call stub, if we do not already have one for this
4531 // sym/object/addend combo.
4533 template<int size
, bool big_endian
>
4535 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4537 const Sized_relobj_file
<size
, big_endian
>* object
,
4539 unsigned int r_type
,
4543 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4544 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4545 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4546 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4549 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4551 && this->targ_
->is_elfv2_localentry0(gsym
))
4553 p
.first
->second
.localentry0_
= 1;
4554 this->targ_
->set_has_localentry0();
4559 && !p
.first
->second
.localentry0_
)
4560 p
.first
->second
.r2save_
= 1;
4561 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4564 template<int size
, bool big_endian
>
4566 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4568 const Sized_relobj_file
<size
, big_endian
>* object
,
4569 unsigned int locsym_index
,
4570 unsigned int r_type
,
4574 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4575 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4576 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4577 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4580 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4582 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4584 p
.first
->second
.localentry0_
= 1;
4585 this->targ_
->set_has_localentry0();
4590 && !p
.first
->second
.localentry0_
)
4591 p
.first
->second
.r2save_
= 1;
4592 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4595 // Find a plt call stub.
4597 template<int size
, bool big_endian
>
4598 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4599 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4600 const Sized_relobj_file
<size
, big_endian
>* object
,
4602 unsigned int r_type
,
4603 Address addend
) const
4605 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4606 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4607 if (p
== this->plt_call_stubs_
.end())
4612 template<int size
, bool big_endian
>
4613 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4614 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4616 Plt_stub_key
key(gsym
);
4617 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4618 if (p
== this->plt_call_stubs_
.end())
4623 template<int size
, bool big_endian
>
4624 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4625 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4626 const Sized_relobj_file
<size
, big_endian
>* object
,
4627 unsigned int locsym_index
,
4628 unsigned int r_type
,
4629 Address addend
) const
4631 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4632 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4633 if (p
== this->plt_call_stubs_
.end())
4638 template<int size
, bool big_endian
>
4639 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4640 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4641 const Sized_relobj_file
<size
, big_endian
>* object
,
4642 unsigned int locsym_index
) const
4644 Plt_stub_key
key(object
, locsym_index
);
4645 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4646 if (p
== this->plt_call_stubs_
.end())
4651 // Add a long branch stub if we don't already have one to given
4654 template<int size
, bool big_endian
>
4656 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4657 const Powerpc_relobj
<size
, big_endian
>* object
,
4658 unsigned int r_type
,
4663 Branch_stub_ent
ent(object
, to
, save_res
);
4664 Address off
= this->branch_size_
;
4665 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
4666 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
4670 this->need_save_res_
= true;
4673 unsigned int stub_size
= this->branch_stub_size(p
.first
);
4674 this->branch_size_
= off
+ stub_size
;
4675 if (size
== 64 && stub_size
!= 4)
4676 this->targ_
->add_branch_lookup_table(to
);
4679 return this->can_reach_stub(from
, off
, r_type
);
4682 // Find long branch stub offset.
4684 template<int size
, bool big_endian
>
4685 typename Stub_table
<size
, big_endian
>::Address
4686 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4687 const Powerpc_relobj
<size
, big_endian
>* object
,
4690 Branch_stub_ent
ent(object
, to
, false);
4691 typename
Branch_stub_entries::const_iterator p
4692 = this->long_branch_stubs_
.find(ent
);
4693 if (p
== this->long_branch_stubs_
.end())
4694 return invalid_address
;
4695 if (p
->first
.save_res_
)
4696 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4700 // A class to handle .glink.
4702 template<int size
, bool big_endian
>
4703 class Output_data_glink
: public Output_section_data
4706 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4707 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4708 static const int pltresolve_size
= 16*4;
4710 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4711 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4712 end_branch_table_(), ge_size_(0)
4716 add_eh_frame(Layout
* layout
);
4719 add_global_entry(const Symbol
*);
4722 find_global_entry(const Symbol
*) const;
4725 global_entry_address() const
4727 gold_assert(this->is_data_size_valid());
4728 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4729 return this->address() + global_entry_off
;
4733 // Write to a map file.
4735 do_print_to_mapfile(Mapfile
* mapfile
) const
4736 { mapfile
->print_output_data(this, _("** glink")); }
4740 set_final_data_size();
4744 do_write(Output_file
*);
4746 // Allows access to .got and .plt for do_write.
4747 Target_powerpc
<size
, big_endian
>* targ_
;
4749 // Map sym to stub offset.
4750 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4751 Global_entry_stub_entries global_entry_stubs_
;
4753 unsigned int end_branch_table_
, ge_size_
;
4756 template<int size
, bool big_endian
>
4758 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4760 if (!parameters
->options().ld_generated_unwind_info())
4765 if (this->targ_
->abiversion() < 2)
4766 layout
->add_eh_frame_for_plt(this,
4767 Eh_cie
<64>::eh_frame_cie
,
4768 sizeof (Eh_cie
<64>::eh_frame_cie
),
4769 glink_eh_frame_fde_64v1
,
4770 sizeof (glink_eh_frame_fde_64v1
));
4772 layout
->add_eh_frame_for_plt(this,
4773 Eh_cie
<64>::eh_frame_cie
,
4774 sizeof (Eh_cie
<64>::eh_frame_cie
),
4775 glink_eh_frame_fde_64v2
,
4776 sizeof (glink_eh_frame_fde_64v2
));
4780 // 32-bit .glink can use the default since the CIE return
4781 // address reg, LR, is valid.
4782 layout
->add_eh_frame_for_plt(this,
4783 Eh_cie
<32>::eh_frame_cie
,
4784 sizeof (Eh_cie
<32>::eh_frame_cie
),
4786 sizeof (default_fde
));
4787 // Except where LR is used in a PIC __glink_PLTresolve.
4788 if (parameters
->options().output_is_position_independent())
4789 layout
->add_eh_frame_for_plt(this,
4790 Eh_cie
<32>::eh_frame_cie
,
4791 sizeof (Eh_cie
<32>::eh_frame_cie
),
4792 glink_eh_frame_fde_32
,
4793 sizeof (glink_eh_frame_fde_32
));
4797 template<int size
, bool big_endian
>
4799 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4801 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4802 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4804 this->ge_size_
+= 16;
4807 template<int size
, bool big_endian
>
4808 typename Output_data_glink
<size
, big_endian
>::Address
4809 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4811 typename
Global_entry_stub_entries::const_iterator p
4812 = this->global_entry_stubs_
.find(gsym
);
4813 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4816 template<int size
, bool big_endian
>
4818 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4820 unsigned int count
= this->targ_
->plt_entry_count();
4821 section_size_type total
= 0;
4827 // space for branch table
4828 total
+= 4 * (count
- 1);
4830 total
+= -total
& 15;
4831 total
+= this->pltresolve_size
;
4835 total
+= this->pltresolve_size
;
4837 // space for branch table
4839 if (this->targ_
->abiversion() < 2)
4843 total
+= 4 * (count
- 0x8000);
4847 this->end_branch_table_
= total
;
4848 total
= (total
+ 15) & -16;
4849 total
+= this->ge_size_
;
4851 this->set_data_size(total
);
4854 // Define symbols on stubs, identifying the stub.
4856 template<int size
, bool big_endian
>
4858 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
4860 if (!this->plt_call_stubs_
.empty())
4862 // The key for the plt call stub hash table includes addresses,
4863 // therefore traversal order depends on those addresses, which
4864 // can change between runs if gold is a PIE. Unfortunately the
4865 // output .symtab ordering depends on the order in which symbols
4866 // are added to the linker symtab. We want reproducible output
4867 // so must sort the call stub symbols.
4868 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
4869 std::vector
<plt_iter
> sorted
;
4870 sorted
.resize(this->plt_call_stubs_
.size());
4872 for (plt_iter cs
= this->plt_call_stubs_
.begin();
4873 cs
!= this->plt_call_stubs_
.end();
4875 sorted
[cs
->second
.indx_
] = cs
;
4877 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
4879 plt_iter cs
= sorted
[i
];
4882 if (cs
->first
.addend_
!= 0)
4883 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
4886 if (cs
->first
.object_
)
4888 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4889 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4890 sprintf(obj
, "%x:", ppcobj
->uniq());
4893 const char *symname
;
4894 if (cs
->first
.sym_
== NULL
)
4896 sprintf(localname
, "%x", cs
->first
.locsym_
);
4897 symname
= localname
;
4900 symname
= cs
->first
.sym_
->name();
4901 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
4902 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
4904 = this->stub_address() - this->address() + cs
->second
.off_
;
4905 unsigned int stub_size
= this->plt_call_size(cs
);
4906 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
4910 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
4911 for (branch_iter bs
= this->long_branch_stubs_
.begin();
4912 bs
!= this->long_branch_stubs_
.end();
4915 if (bs
->first
.save_res_
)
4918 char* name
= new char[8 + 13 + 16 + 1];
4919 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
4920 static_cast<unsigned long long>(bs
->first
.dest_
));
4921 Address value
= (this->stub_address() - this->address()
4922 + this->plt_size_
+ bs
->second
);
4923 unsigned int stub_size
= this->branch_stub_size(bs
);
4924 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
4928 // Write out plt and long branch stub code.
4930 template<int size
, bool big_endian
>
4932 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4934 if (this->plt_call_stubs_
.empty()
4935 && this->long_branch_stubs_
.empty())
4938 const section_size_type start_off
= this->offset();
4939 const section_size_type off
= this->stub_offset();
4940 const section_size_type oview_size
=
4941 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4942 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4947 const Output_data_got_powerpc
<size
, big_endian
>* got
4948 = this->targ_
->got_section();
4949 Address got_os_addr
= got
->output_section()->address();
4951 if (!this->plt_call_stubs_
.empty())
4953 // The base address of the .plt section.
4954 Address plt_base
= this->targ_
->plt_section()->address();
4955 Address iplt_base
= invalid_address
;
4957 // Write out plt call stubs.
4958 typename
Plt_stub_entries::const_iterator cs
;
4959 for (cs
= this->plt_call_stubs_
.begin();
4960 cs
!= this->plt_call_stubs_
.end();
4964 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4965 Address plt_addr
= pltoff
;
4968 if (iplt_base
== invalid_address
)
4969 iplt_base
= this->targ_
->iplt_section()->address();
4970 plt_addr
+= iplt_base
;
4973 plt_addr
+= plt_base
;
4974 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4975 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4976 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4977 Address off
= plt_addr
- got_addr
;
4979 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4980 gold_error(_("%s: linkage table error against `%s'"),
4981 cs
->first
.object_
->name().c_str(),
4982 cs
->first
.sym_
->demangled_name().c_str());
4984 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4986 = plt_load_toc
&& parameters
->options().plt_static_chain();
4988 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4989 bool use_fake_dep
= false;
4990 Address cmp_branch_off
= 0;
4993 unsigned int pltindex
4994 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4995 / this->targ_
->plt_entry_size());
4997 = (this->targ_
->glink_section()->pltresolve_size
4999 if (pltindex
> 32768)
5000 glinkoff
+= (pltindex
- 32768) * 4;
5002 = this->targ_
->glink_section()->address() + glinkoff
;
5004 = (this->stub_address() + cs
->second
.off_
+ 20
5005 + 4 * cs
->second
.r2save_
5006 + 4 * (ha(off
) != 0)
5007 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5008 + 4 * static_chain
);
5009 cmp_branch_off
= to
- from
;
5010 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
5013 p
= oview
+ cs
->second
.off_
;
5016 if (cs
->second
.r2save_
)
5018 write_insn
<big_endian
>(p
,
5019 std_2_1
+ this->targ_
->stk_toc());
5024 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
5026 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
5031 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
5033 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
5037 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5039 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
5043 write_insn
<big_endian
>(p
, mtctr_12
);
5049 write_insn
<big_endian
>(p
, xor_2_12_12
);
5051 write_insn
<big_endian
>(p
, add_11_11_2
);
5054 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5058 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5065 if (cs
->second
.r2save_
)
5067 write_insn
<big_endian
>(p
,
5068 std_2_1
+ this->targ_
->stk_toc());
5071 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5074 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5076 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5080 write_insn
<big_endian
>(p
, mtctr_12
);
5086 write_insn
<big_endian
>(p
, xor_11_12_12
);
5088 write_insn
<big_endian
>(p
, add_2_2_11
);
5093 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5096 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5100 if (thread_safe
&& !use_fake_dep
)
5102 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5104 write_insn
<big_endian
>(p
, bnectr_p4
);
5106 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5109 write_insn
<big_endian
>(p
, bctr
);
5113 // Write out long branch stubs.
5114 typename
Branch_stub_entries::const_iterator bs
;
5115 for (bs
= this->long_branch_stubs_
.begin();
5116 bs
!= this->long_branch_stubs_
.end();
5119 if (bs
->first
.save_res_
)
5121 p
= oview
+ this->plt_size_
+ bs
->second
;
5122 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5123 Address delta
= bs
->first
.dest_
- loc
;
5124 if (delta
+ (1 << 25) < 2 << 25)
5125 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5129 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5130 gold_assert(brlt_addr
!= invalid_address
);
5131 brlt_addr
+= this->targ_
->brlt_section()->address();
5132 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5133 Address brltoff
= brlt_addr
- got_addr
;
5134 if (ha(brltoff
) == 0)
5136 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5140 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5141 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5143 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5144 write_insn
<big_endian
>(p
, bctr
);
5150 if (!this->plt_call_stubs_
.empty())
5152 // The base address of the .plt section.
5153 Address plt_base
= this->targ_
->plt_section()->address();
5154 Address iplt_base
= invalid_address
;
5155 // The address of _GLOBAL_OFFSET_TABLE_.
5156 Address g_o_t
= invalid_address
;
5158 // Write out plt call stubs.
5159 typename
Plt_stub_entries::const_iterator cs
;
5160 for (cs
= this->plt_call_stubs_
.begin();
5161 cs
!= this->plt_call_stubs_
.end();
5165 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
5168 if (iplt_base
== invalid_address
)
5169 iplt_base
= this->targ_
->iplt_section()->address();
5170 plt_addr
+= iplt_base
;
5173 plt_addr
+= plt_base
;
5175 p
= oview
+ cs
->second
.off_
;
5176 if (parameters
->options().output_is_position_independent())
5179 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5180 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5181 (cs
->first
.object_
));
5182 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5184 unsigned int got2
= ppcobj
->got2_shndx();
5185 got_addr
= ppcobj
->get_output_section_offset(got2
);
5186 gold_assert(got_addr
!= invalid_address
);
5187 got_addr
+= (ppcobj
->output_section(got2
)->address()
5188 + cs
->first
.addend_
);
5192 if (g_o_t
== invalid_address
)
5194 const Output_data_got_powerpc
<size
, big_endian
>* got
5195 = this->targ_
->got_section();
5196 g_o_t
= got
->address() + got
->g_o_t();
5201 Address off
= plt_addr
- got_addr
;
5204 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
5205 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
5206 write_insn
<big_endian
>(p
+ 8, bctr
);
5210 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
5211 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
5212 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
5213 write_insn
<big_endian
>(p
+ 12, bctr
);
5218 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
5219 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
5220 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
5221 write_insn
<big_endian
>(p
+ 12, bctr
);
5226 // Write out long branch stubs.
5227 typename
Branch_stub_entries::const_iterator bs
;
5228 for (bs
= this->long_branch_stubs_
.begin();
5229 bs
!= this->long_branch_stubs_
.end();
5232 if (bs
->first
.save_res_
)
5234 p
= oview
+ this->plt_size_
+ bs
->second
;
5235 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5236 Address delta
= bs
->first
.dest_
- loc
;
5237 if (delta
+ (1 << 25) < 2 << 25)
5238 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5239 else if (!parameters
->options().output_is_position_independent())
5241 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
5242 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
5243 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
5244 write_insn
<big_endian
>(p
+ 12, bctr
);
5249 write_insn
<big_endian
>(p
+ 0, mflr_0
);
5250 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
5251 write_insn
<big_endian
>(p
+ 8, mflr_12
);
5252 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
5253 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
5254 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5255 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
5256 write_insn
<big_endian
>(p
+ 28, bctr
);
5260 if (this->need_save_res_
)
5262 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5263 memcpy (p
, this->targ_
->savres_section()->contents(),
5264 this->targ_
->savres_section()->data_size());
5268 // Write out .glink.
5270 template<int size
, bool big_endian
>
5272 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5274 const section_size_type off
= this->offset();
5275 const section_size_type oview_size
=
5276 convert_to_section_size_type(this->data_size());
5277 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5280 // The base address of the .plt section.
5281 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5282 Address plt_base
= this->targ_
->plt_section()->address();
5286 if (this->end_branch_table_
!= 0)
5288 // Write pltresolve stub.
5290 Address after_bcl
= this->address() + 16;
5291 Address pltoff
= plt_base
- after_bcl
;
5293 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5295 if (this->targ_
->abiversion() < 2)
5297 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5298 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5299 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5300 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5301 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5302 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5303 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5304 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5305 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5306 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5310 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5311 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5312 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5313 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5314 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5315 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5316 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5317 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5318 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5319 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5320 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5321 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5322 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5324 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5325 while (p
< oview
+ this->pltresolve_size
)
5326 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5328 // Write lazy link call stubs.
5330 while (p
< oview
+ this->end_branch_table_
)
5332 if (this->targ_
->abiversion() < 2)
5336 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5340 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5341 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5344 uint32_t branch_off
= 8 - (p
- oview
);
5345 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5350 Address plt_base
= this->targ_
->plt_section()->address();
5351 Address iplt_base
= invalid_address
;
5352 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
5353 Address global_entry_base
= this->address() + global_entry_off
;
5354 typename
Global_entry_stub_entries::const_iterator ge
;
5355 for (ge
= this->global_entry_stubs_
.begin();
5356 ge
!= this->global_entry_stubs_
.end();
5359 p
= oview
+ global_entry_off
+ ge
->second
;
5360 Address plt_addr
= ge
->first
->plt_offset();
5361 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5362 && ge
->first
->can_use_relative_reloc(false))
5364 if (iplt_base
== invalid_address
)
5365 iplt_base
= this->targ_
->iplt_section()->address();
5366 plt_addr
+= iplt_base
;
5369 plt_addr
+= plt_base
;
5370 Address my_addr
= global_entry_base
+ ge
->second
;
5371 Address off
= plt_addr
- my_addr
;
5373 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5374 gold_error(_("%s: linkage table error against `%s'"),
5375 ge
->first
->object()->name().c_str(),
5376 ge
->first
->demangled_name().c_str());
5378 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5379 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5380 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5381 write_insn
<big_endian
>(p
, bctr
);
5386 const Output_data_got_powerpc
<size
, big_endian
>* got
5387 = this->targ_
->got_section();
5388 // The address of _GLOBAL_OFFSET_TABLE_.
5389 Address g_o_t
= got
->address() + got
->g_o_t();
5391 // Write out pltresolve branch table.
5393 unsigned int the_end
= oview_size
- this->pltresolve_size
;
5394 unsigned char* end_p
= oview
+ the_end
;
5395 while (p
< end_p
- 8 * 4)
5396 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5398 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5400 // Write out pltresolve call stub.
5401 if (parameters
->options().output_is_position_independent())
5403 Address res0_off
= 0;
5404 Address after_bcl_off
= the_end
+ 12;
5405 Address bcl_res0
= after_bcl_off
- res0_off
;
5407 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
5408 write_insn
<big_endian
>(p
+ 4, mflr_0
);
5409 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
5410 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
5411 write_insn
<big_endian
>(p
+ 16, mflr_12
);
5412 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5413 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
5415 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5417 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
5418 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5420 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
5421 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
5425 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
5426 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
5428 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
5429 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
5430 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
5431 write_insn
<big_endian
>(p
+ 52, bctr
);
5432 write_insn
<big_endian
>(p
+ 56, nop
);
5433 write_insn
<big_endian
>(p
+ 60, nop
);
5437 Address res0
= this->address();
5439 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
5440 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
5441 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5442 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
5444 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
5445 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
5446 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
5447 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
5448 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5449 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
5451 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
5452 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
5453 write_insn
<big_endian
>(p
+ 32, bctr
);
5454 write_insn
<big_endian
>(p
+ 36, nop
);
5455 write_insn
<big_endian
>(p
+ 40, nop
);
5456 write_insn
<big_endian
>(p
+ 44, nop
);
5457 write_insn
<big_endian
>(p
+ 48, nop
);
5458 write_insn
<big_endian
>(p
+ 52, nop
);
5459 write_insn
<big_endian
>(p
+ 56, nop
);
5460 write_insn
<big_endian
>(p
+ 60, nop
);
5465 of
->write_output_view(off
, oview_size
, oview
);
5469 // A class to handle linker generated save/restore functions.
5471 template<int size
, bool big_endian
>
5472 class Output_data_save_res
: public Output_section_data_build
5475 Output_data_save_res(Symbol_table
* symtab
);
5477 const unsigned char*
5484 // Write to a map file.
5486 do_print_to_mapfile(Mapfile
* mapfile
) const
5487 { mapfile
->print_output_data(this, _("** save/restore")); }
5490 do_write(Output_file
*);
5493 // The maximum size of save/restore contents.
5494 static const unsigned int savres_max
= 218*4;
5497 savres_define(Symbol_table
* symtab
,
5499 unsigned int lo
, unsigned int hi
,
5500 unsigned char* write_ent(unsigned char*, int),
5501 unsigned char* write_tail(unsigned char*, int));
5503 unsigned char *contents_
;
5506 template<bool big_endian
>
5507 static unsigned char*
5508 savegpr0(unsigned char* p
, int r
)
5510 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5511 write_insn
<big_endian
>(p
, insn
);
5515 template<bool big_endian
>
5516 static unsigned char*
5517 savegpr0_tail(unsigned char* p
, int r
)
5519 p
= savegpr0
<big_endian
>(p
, r
);
5520 uint32_t insn
= std_0_1
+ 16;
5521 write_insn
<big_endian
>(p
, insn
);
5523 write_insn
<big_endian
>(p
, blr
);
5527 template<bool big_endian
>
5528 static unsigned char*
5529 restgpr0(unsigned char* p
, int r
)
5531 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5532 write_insn
<big_endian
>(p
, insn
);
5536 template<bool big_endian
>
5537 static unsigned char*
5538 restgpr0_tail(unsigned char* p
, int r
)
5540 uint32_t insn
= ld_0_1
+ 16;
5541 write_insn
<big_endian
>(p
, insn
);
5543 p
= restgpr0
<big_endian
>(p
, r
);
5544 write_insn
<big_endian
>(p
, mtlr_0
);
5548 p
= restgpr0
<big_endian
>(p
, 30);
5549 p
= restgpr0
<big_endian
>(p
, 31);
5551 write_insn
<big_endian
>(p
, blr
);
5555 template<bool big_endian
>
5556 static unsigned char*
5557 savegpr1(unsigned char* p
, int r
)
5559 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5560 write_insn
<big_endian
>(p
, insn
);
5564 template<bool big_endian
>
5565 static unsigned char*
5566 savegpr1_tail(unsigned char* p
, int r
)
5568 p
= savegpr1
<big_endian
>(p
, r
);
5569 write_insn
<big_endian
>(p
, blr
);
5573 template<bool big_endian
>
5574 static unsigned char*
5575 restgpr1(unsigned char* p
, int r
)
5577 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5578 write_insn
<big_endian
>(p
, insn
);
5582 template<bool big_endian
>
5583 static unsigned char*
5584 restgpr1_tail(unsigned char* p
, int r
)
5586 p
= restgpr1
<big_endian
>(p
, r
);
5587 write_insn
<big_endian
>(p
, blr
);
5591 template<bool big_endian
>
5592 static unsigned char*
5593 savefpr(unsigned char* p
, int r
)
5595 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5596 write_insn
<big_endian
>(p
, insn
);
5600 template<bool big_endian
>
5601 static unsigned char*
5602 savefpr0_tail(unsigned char* p
, int r
)
5604 p
= savefpr
<big_endian
>(p
, r
);
5605 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5607 write_insn
<big_endian
>(p
, blr
);
5611 template<bool big_endian
>
5612 static unsigned char*
5613 restfpr(unsigned char* p
, int r
)
5615 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5616 write_insn
<big_endian
>(p
, insn
);
5620 template<bool big_endian
>
5621 static unsigned char*
5622 restfpr0_tail(unsigned char* p
, int r
)
5624 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5626 p
= restfpr
<big_endian
>(p
, r
);
5627 write_insn
<big_endian
>(p
, mtlr_0
);
5631 p
= restfpr
<big_endian
>(p
, 30);
5632 p
= restfpr
<big_endian
>(p
, 31);
5634 write_insn
<big_endian
>(p
, blr
);
5638 template<bool big_endian
>
5639 static unsigned char*
5640 savefpr1_tail(unsigned char* p
, int r
)
5642 p
= savefpr
<big_endian
>(p
, r
);
5643 write_insn
<big_endian
>(p
, blr
);
5647 template<bool big_endian
>
5648 static unsigned char*
5649 restfpr1_tail(unsigned char* p
, int r
)
5651 p
= restfpr
<big_endian
>(p
, r
);
5652 write_insn
<big_endian
>(p
, blr
);
5656 template<bool big_endian
>
5657 static unsigned char*
5658 savevr(unsigned char* p
, int r
)
5660 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5661 write_insn
<big_endian
>(p
, insn
);
5663 insn
= stvx_0_12_0
+ (r
<< 21);
5664 write_insn
<big_endian
>(p
, insn
);
5668 template<bool big_endian
>
5669 static unsigned char*
5670 savevr_tail(unsigned char* p
, int r
)
5672 p
= savevr
<big_endian
>(p
, r
);
5673 write_insn
<big_endian
>(p
, blr
);
5677 template<bool big_endian
>
5678 static unsigned char*
5679 restvr(unsigned char* p
, int r
)
5681 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5682 write_insn
<big_endian
>(p
, insn
);
5684 insn
= lvx_0_12_0
+ (r
<< 21);
5685 write_insn
<big_endian
>(p
, insn
);
5689 template<bool big_endian
>
5690 static unsigned char*
5691 restvr_tail(unsigned char* p
, int r
)
5693 p
= restvr
<big_endian
>(p
, r
);
5694 write_insn
<big_endian
>(p
, blr
);
5699 template<int size
, bool big_endian
>
5700 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5701 Symbol_table
* symtab
)
5702 : Output_section_data_build(4),
5705 this->savres_define(symtab
,
5706 "_savegpr0_", 14, 31,
5707 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5708 this->savres_define(symtab
,
5709 "_restgpr0_", 14, 29,
5710 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5711 this->savres_define(symtab
,
5712 "_restgpr0_", 30, 31,
5713 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5714 this->savres_define(symtab
,
5715 "_savegpr1_", 14, 31,
5716 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5717 this->savres_define(symtab
,
5718 "_restgpr1_", 14, 31,
5719 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5720 this->savres_define(symtab
,
5721 "_savefpr_", 14, 31,
5722 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5723 this->savres_define(symtab
,
5724 "_restfpr_", 14, 29,
5725 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5726 this->savres_define(symtab
,
5727 "_restfpr_", 30, 31,
5728 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5729 this->savres_define(symtab
,
5731 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5732 this->savres_define(symtab
,
5734 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5735 this->savres_define(symtab
,
5737 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5738 this->savres_define(symtab
,
5740 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5743 template<int size
, bool big_endian
>
5745 Output_data_save_res
<size
, big_endian
>::savres_define(
5746 Symbol_table
* symtab
,
5748 unsigned int lo
, unsigned int hi
,
5749 unsigned char* write_ent(unsigned char*, int),
5750 unsigned char* write_tail(unsigned char*, int))
5752 size_t len
= strlen(name
);
5753 bool writing
= false;
5756 memcpy(sym
, name
, len
);
5759 for (unsigned int i
= lo
; i
<= hi
; i
++)
5761 sym
[len
+ 0] = i
/ 10 + '0';
5762 sym
[len
+ 1] = i
% 10 + '0';
5763 Symbol
* gsym
= symtab
->lookup(sym
);
5764 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5765 writing
= writing
|| refd
;
5768 if (this->contents_
== NULL
)
5769 this->contents_
= new unsigned char[this->savres_max
];
5771 section_size_type value
= this->current_data_size();
5772 unsigned char* p
= this->contents_
+ value
;
5774 p
= write_ent(p
, i
);
5776 p
= write_tail(p
, i
);
5777 section_size_type cur_size
= p
- this->contents_
;
5778 this->set_current_data_size(cur_size
);
5780 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5781 this, value
, cur_size
- value
,
5782 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5783 elfcpp::STV_HIDDEN
, 0, false, false);
5788 // Write out save/restore.
5790 template<int size
, bool big_endian
>
5792 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5794 const section_size_type off
= this->offset();
5795 const section_size_type oview_size
=
5796 convert_to_section_size_type(this->data_size());
5797 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5798 memcpy(oview
, this->contents_
, oview_size
);
5799 of
->write_output_view(off
, oview_size
, oview
);
5803 // Create the glink section.
5805 template<int size
, bool big_endian
>
5807 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5809 if (this->glink_
== NULL
)
5811 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5812 this->glink_
->add_eh_frame(layout
);
5813 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5814 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5815 this->glink_
, ORDER_TEXT
, false);
5819 // Create a PLT entry for a global symbol.
5821 template<int size
, bool big_endian
>
5823 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5827 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5828 && gsym
->can_use_relative_reloc(false))
5830 if (this->iplt_
== NULL
)
5831 this->make_iplt_section(symtab
, layout
);
5832 this->iplt_
->add_ifunc_entry(gsym
);
5836 if (this->plt_
== NULL
)
5837 this->make_plt_section(symtab
, layout
);
5838 this->plt_
->add_entry(gsym
);
5842 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5844 template<int size
, bool big_endian
>
5846 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5847 Symbol_table
* symtab
,
5849 Sized_relobj_file
<size
, big_endian
>* relobj
,
5852 if (this->iplt_
== NULL
)
5853 this->make_iplt_section(symtab
, layout
);
5854 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5857 // Return the number of entries in the PLT.
5859 template<int size
, bool big_endian
>
5861 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5863 if (this->plt_
== NULL
)
5865 return this->plt_
->entry_count();
5868 // Create a GOT entry for local dynamic __tls_get_addr calls.
5870 template<int size
, bool big_endian
>
5872 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5873 Symbol_table
* symtab
,
5875 Sized_relobj_file
<size
, big_endian
>* object
)
5877 if (this->tlsld_got_offset_
== -1U)
5879 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5880 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5881 Output_data_got_powerpc
<size
, big_endian
>* got
5882 = this->got_section(symtab
, layout
);
5883 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5884 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5886 this->tlsld_got_offset_
= got_offset
;
5888 return this->tlsld_got_offset_
;
5891 // Get the Reference_flags for a particular relocation.
5893 template<int size
, bool big_endian
>
5895 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5896 unsigned int r_type
,
5897 const Target_powerpc
* target
)
5903 case elfcpp::R_POWERPC_NONE
:
5904 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5905 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5906 case elfcpp::R_PPC64_TOC
:
5907 // No symbol reference.
5910 case elfcpp::R_PPC64_ADDR64
:
5911 case elfcpp::R_PPC64_UADDR64
:
5912 case elfcpp::R_POWERPC_ADDR32
:
5913 case elfcpp::R_POWERPC_UADDR32
:
5914 case elfcpp::R_POWERPC_ADDR16
:
5915 case elfcpp::R_POWERPC_UADDR16
:
5916 case elfcpp::R_POWERPC_ADDR16_LO
:
5917 case elfcpp::R_POWERPC_ADDR16_HI
:
5918 case elfcpp::R_POWERPC_ADDR16_HA
:
5919 ref
= Symbol::ABSOLUTE_REF
;
5922 case elfcpp::R_POWERPC_ADDR24
:
5923 case elfcpp::R_POWERPC_ADDR14
:
5924 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5925 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5926 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5929 case elfcpp::R_PPC64_REL64
:
5930 case elfcpp::R_POWERPC_REL32
:
5931 case elfcpp::R_PPC_LOCAL24PC
:
5932 case elfcpp::R_POWERPC_REL16
:
5933 case elfcpp::R_POWERPC_REL16_LO
:
5934 case elfcpp::R_POWERPC_REL16_HI
:
5935 case elfcpp::R_POWERPC_REL16_HA
:
5936 ref
= Symbol::RELATIVE_REF
;
5939 case elfcpp::R_POWERPC_REL24
:
5940 case elfcpp::R_PPC_PLTREL24
:
5941 case elfcpp::R_POWERPC_REL14
:
5942 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5943 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5944 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5947 case elfcpp::R_POWERPC_GOT16
:
5948 case elfcpp::R_POWERPC_GOT16_LO
:
5949 case elfcpp::R_POWERPC_GOT16_HI
:
5950 case elfcpp::R_POWERPC_GOT16_HA
:
5951 case elfcpp::R_PPC64_GOT16_DS
:
5952 case elfcpp::R_PPC64_GOT16_LO_DS
:
5953 case elfcpp::R_PPC64_TOC16
:
5954 case elfcpp::R_PPC64_TOC16_LO
:
5955 case elfcpp::R_PPC64_TOC16_HI
:
5956 case elfcpp::R_PPC64_TOC16_HA
:
5957 case elfcpp::R_PPC64_TOC16_DS
:
5958 case elfcpp::R_PPC64_TOC16_LO_DS
:
5959 ref
= Symbol::RELATIVE_REF
;
5962 case elfcpp::R_POWERPC_GOT_TPREL16
:
5963 case elfcpp::R_POWERPC_TLS
:
5964 ref
= Symbol::TLS_REF
;
5967 case elfcpp::R_POWERPC_COPY
:
5968 case elfcpp::R_POWERPC_GLOB_DAT
:
5969 case elfcpp::R_POWERPC_JMP_SLOT
:
5970 case elfcpp::R_POWERPC_RELATIVE
:
5971 case elfcpp::R_POWERPC_DTPMOD
:
5973 // Not expected. We will give an error later.
5977 if (size
== 64 && target
->abiversion() < 2)
5978 ref
|= Symbol::FUNC_DESC_ABI
;
5982 // Report an unsupported relocation against a local symbol.
5984 template<int size
, bool big_endian
>
5986 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5987 Sized_relobj_file
<size
, big_endian
>* object
,
5988 unsigned int r_type
)
5990 gold_error(_("%s: unsupported reloc %u against local symbol"),
5991 object
->name().c_str(), r_type
);
5994 // We are about to emit a dynamic relocation of type R_TYPE. If the
5995 // dynamic linker does not support it, issue an error.
5997 template<int size
, bool big_endian
>
5999 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
6000 unsigned int r_type
)
6002 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
6004 // These are the relocation types supported by glibc for both 32-bit
6005 // and 64-bit powerpc.
6008 case elfcpp::R_POWERPC_NONE
:
6009 case elfcpp::R_POWERPC_RELATIVE
:
6010 case elfcpp::R_POWERPC_GLOB_DAT
:
6011 case elfcpp::R_POWERPC_DTPMOD
:
6012 case elfcpp::R_POWERPC_DTPREL
:
6013 case elfcpp::R_POWERPC_TPREL
:
6014 case elfcpp::R_POWERPC_JMP_SLOT
:
6015 case elfcpp::R_POWERPC_COPY
:
6016 case elfcpp::R_POWERPC_IRELATIVE
:
6017 case elfcpp::R_POWERPC_ADDR32
:
6018 case elfcpp::R_POWERPC_UADDR32
:
6019 case elfcpp::R_POWERPC_ADDR24
:
6020 case elfcpp::R_POWERPC_ADDR16
:
6021 case elfcpp::R_POWERPC_UADDR16
:
6022 case elfcpp::R_POWERPC_ADDR16_LO
:
6023 case elfcpp::R_POWERPC_ADDR16_HI
:
6024 case elfcpp::R_POWERPC_ADDR16_HA
:
6025 case elfcpp::R_POWERPC_ADDR14
:
6026 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6027 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6028 case elfcpp::R_POWERPC_REL32
:
6029 case elfcpp::R_POWERPC_REL24
:
6030 case elfcpp::R_POWERPC_TPREL16
:
6031 case elfcpp::R_POWERPC_TPREL16_LO
:
6032 case elfcpp::R_POWERPC_TPREL16_HI
:
6033 case elfcpp::R_POWERPC_TPREL16_HA
:
6044 // These are the relocation types supported only on 64-bit.
6045 case elfcpp::R_PPC64_ADDR64
:
6046 case elfcpp::R_PPC64_UADDR64
:
6047 case elfcpp::R_PPC64_JMP_IREL
:
6048 case elfcpp::R_PPC64_ADDR16_DS
:
6049 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6050 case elfcpp::R_PPC64_ADDR16_HIGH
:
6051 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6052 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6053 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6054 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6055 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6056 case elfcpp::R_PPC64_REL64
:
6057 case elfcpp::R_POWERPC_ADDR30
:
6058 case elfcpp::R_PPC64_TPREL16_DS
:
6059 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6060 case elfcpp::R_PPC64_TPREL16_HIGH
:
6061 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6062 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6063 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6064 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6065 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6076 // These are the relocation types supported only on 32-bit.
6077 // ??? glibc ld.so doesn't need to support these.
6078 case elfcpp::R_POWERPC_DTPREL16
:
6079 case elfcpp::R_POWERPC_DTPREL16_LO
:
6080 case elfcpp::R_POWERPC_DTPREL16_HI
:
6081 case elfcpp::R_POWERPC_DTPREL16_HA
:
6089 // This prevents us from issuing more than one error per reloc
6090 // section. But we can still wind up issuing more than one
6091 // error per object file.
6092 if (this->issued_non_pic_error_
)
6094 gold_assert(parameters
->options().output_is_position_independent());
6095 object
->error(_("requires unsupported dynamic reloc; "
6096 "recompile with -fPIC"));
6097 this->issued_non_pic_error_
= true;
6101 // Return whether we need to make a PLT entry for a relocation of the
6102 // given type against a STT_GNU_IFUNC symbol.
6104 template<int size
, bool big_endian
>
6106 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6107 Target_powerpc
<size
, big_endian
>* target
,
6108 Sized_relobj_file
<size
, big_endian
>* object
,
6109 unsigned int r_type
,
6112 // In non-pic code any reference will resolve to the plt call stub
6113 // for the ifunc symbol.
6114 if ((size
== 32 || target
->abiversion() >= 2)
6115 && !parameters
->options().output_is_position_independent())
6120 // Word size refs from data sections are OK, but don't need a PLT entry.
6121 case elfcpp::R_POWERPC_ADDR32
:
6122 case elfcpp::R_POWERPC_UADDR32
:
6127 case elfcpp::R_PPC64_ADDR64
:
6128 case elfcpp::R_PPC64_UADDR64
:
6133 // GOT refs are good, but also don't need a PLT entry.
6134 case elfcpp::R_POWERPC_GOT16
:
6135 case elfcpp::R_POWERPC_GOT16_LO
:
6136 case elfcpp::R_POWERPC_GOT16_HI
:
6137 case elfcpp::R_POWERPC_GOT16_HA
:
6138 case elfcpp::R_PPC64_GOT16_DS
:
6139 case elfcpp::R_PPC64_GOT16_LO_DS
:
6142 // Function calls are good, and these do need a PLT entry.
6143 case elfcpp::R_POWERPC_ADDR24
:
6144 case elfcpp::R_POWERPC_ADDR14
:
6145 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6146 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6147 case elfcpp::R_POWERPC_REL24
:
6148 case elfcpp::R_PPC_PLTREL24
:
6149 case elfcpp::R_POWERPC_REL14
:
6150 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6151 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6158 // Anything else is a problem.
6159 // If we are building a static executable, the libc startup function
6160 // responsible for applying indirect function relocations is going
6161 // to complain about the reloc type.
6162 // If we are building a dynamic executable, we will have a text
6163 // relocation. The dynamic loader will set the text segment
6164 // writable and non-executable to apply text relocations. So we'll
6165 // segfault when trying to run the indirection function to resolve
6168 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6169 object
->name().c_str(), r_type
);
6173 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6177 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6179 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6180 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6181 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6182 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6183 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6184 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6185 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6186 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6187 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6188 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6189 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6190 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6191 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6192 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6193 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6194 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6195 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6196 /* Exclude lfqu by testing reloc. If relocs are ever
6197 defined for the reduced D field in psq_lu then those
6198 will need testing too. */
6199 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6200 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6201 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6203 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6204 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6205 /* Exclude stfqu. psq_stu as above for psq_lu. */
6206 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6207 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6208 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6209 && (insn
& 1) == 0));
6212 // Scan a relocation for a local symbol.
6214 template<int size
, bool big_endian
>
6216 Target_powerpc
<size
, big_endian
>::Scan::local(
6217 Symbol_table
* symtab
,
6219 Target_powerpc
<size
, big_endian
>* target
,
6220 Sized_relobj_file
<size
, big_endian
>* object
,
6221 unsigned int data_shndx
,
6222 Output_section
* output_section
,
6223 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6224 unsigned int r_type
,
6225 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6228 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
6230 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6231 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6233 this->expect_tls_get_addr_call();
6234 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6235 if (tls_type
!= tls::TLSOPT_NONE
)
6236 this->skip_next_tls_get_addr_call();
6238 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6239 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6241 this->expect_tls_get_addr_call();
6242 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6243 if (tls_type
!= tls::TLSOPT_NONE
)
6244 this->skip_next_tls_get_addr_call();
6247 Powerpc_relobj
<size
, big_endian
>* ppc_object
6248 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6253 && data_shndx
== ppc_object
->opd_shndx()
6254 && r_type
== elfcpp::R_PPC64_ADDR64
)
6255 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6259 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6260 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6261 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6263 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6264 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6265 r_type
, r_sym
, reloc
.get_r_addend());
6266 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6271 case elfcpp::R_POWERPC_NONE
:
6272 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6273 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6274 case elfcpp::R_POWERPC_TLS
:
6275 case elfcpp::R_PPC64_ENTRY
:
6278 case elfcpp::R_PPC64_TOC
:
6280 Output_data_got_powerpc
<size
, big_endian
>* got
6281 = target
->got_section(symtab
, layout
);
6282 if (parameters
->options().output_is_position_independent())
6284 Address off
= reloc
.get_r_offset();
6286 && target
->abiversion() < 2
6287 && data_shndx
== ppc_object
->opd_shndx()
6288 && ppc_object
->get_opd_discard(off
- 8))
6291 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6292 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6293 rela_dyn
->add_output_section_relative(got
->output_section(),
6294 elfcpp::R_POWERPC_RELATIVE
,
6296 object
, data_shndx
, off
,
6297 symobj
->toc_base_offset());
6302 case elfcpp::R_PPC64_ADDR64
:
6303 case elfcpp::R_PPC64_UADDR64
:
6304 case elfcpp::R_POWERPC_ADDR32
:
6305 case elfcpp::R_POWERPC_UADDR32
:
6306 case elfcpp::R_POWERPC_ADDR24
:
6307 case elfcpp::R_POWERPC_ADDR16
:
6308 case elfcpp::R_POWERPC_ADDR16_LO
:
6309 case elfcpp::R_POWERPC_ADDR16_HI
:
6310 case elfcpp::R_POWERPC_ADDR16_HA
:
6311 case elfcpp::R_POWERPC_UADDR16
:
6312 case elfcpp::R_PPC64_ADDR16_HIGH
:
6313 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6314 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6315 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6316 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6317 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6318 case elfcpp::R_PPC64_ADDR16_DS
:
6319 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6320 case elfcpp::R_POWERPC_ADDR14
:
6321 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6322 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6323 // If building a shared library (or a position-independent
6324 // executable), we need to create a dynamic relocation for
6326 if (parameters
->options().output_is_position_independent()
6327 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6329 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6331 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6332 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6333 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6335 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6336 : elfcpp::R_POWERPC_RELATIVE
);
6337 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6338 output_section
, data_shndx
,
6339 reloc
.get_r_offset(),
6340 reloc
.get_r_addend(), false);
6342 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6344 check_non_pic(object
, r_type
);
6345 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6346 data_shndx
, reloc
.get_r_offset(),
6347 reloc
.get_r_addend());
6351 gold_assert(lsym
.get_st_value() == 0);
6352 unsigned int shndx
= lsym
.get_st_shndx();
6354 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6357 object
->error(_("section symbol %u has bad shndx %u"),
6360 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6361 output_section
, data_shndx
,
6362 reloc
.get_r_offset());
6367 case elfcpp::R_POWERPC_REL24
:
6368 case elfcpp::R_PPC_PLTREL24
:
6369 case elfcpp::R_PPC_LOCAL24PC
:
6370 case elfcpp::R_POWERPC_REL14
:
6371 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6372 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6375 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6376 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6377 r_type
, r_sym
, reloc
.get_r_addend());
6381 case elfcpp::R_PPC64_TOCSAVE
:
6382 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6383 // caller has already saved r2 and thus a plt call stub need not
6386 && target
->mark_pltcall(ppc_object
, data_shndx
,
6387 reloc
.get_r_offset() - 4, symtab
))
6389 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6390 unsigned int shndx
= lsym
.get_st_shndx();
6392 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6394 object
->error(_("tocsave symbol %u has bad shndx %u"),
6397 target
->add_tocsave(ppc_object
, shndx
,
6398 lsym
.get_st_value() + reloc
.get_r_addend());
6402 case elfcpp::R_PPC64_REL64
:
6403 case elfcpp::R_POWERPC_REL32
:
6404 case elfcpp::R_POWERPC_REL16
:
6405 case elfcpp::R_POWERPC_REL16_LO
:
6406 case elfcpp::R_POWERPC_REL16_HI
:
6407 case elfcpp::R_POWERPC_REL16_HA
:
6408 case elfcpp::R_POWERPC_REL16DX_HA
:
6409 case elfcpp::R_POWERPC_SECTOFF
:
6410 case elfcpp::R_POWERPC_SECTOFF_LO
:
6411 case elfcpp::R_POWERPC_SECTOFF_HI
:
6412 case elfcpp::R_POWERPC_SECTOFF_HA
:
6413 case elfcpp::R_PPC64_SECTOFF_DS
:
6414 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6415 case elfcpp::R_POWERPC_TPREL16
:
6416 case elfcpp::R_POWERPC_TPREL16_LO
:
6417 case elfcpp::R_POWERPC_TPREL16_HI
:
6418 case elfcpp::R_POWERPC_TPREL16_HA
:
6419 case elfcpp::R_PPC64_TPREL16_DS
:
6420 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6421 case elfcpp::R_PPC64_TPREL16_HIGH
:
6422 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6423 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6424 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6425 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6426 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6427 case elfcpp::R_POWERPC_DTPREL16
:
6428 case elfcpp::R_POWERPC_DTPREL16_LO
:
6429 case elfcpp::R_POWERPC_DTPREL16_HI
:
6430 case elfcpp::R_POWERPC_DTPREL16_HA
:
6431 case elfcpp::R_PPC64_DTPREL16_DS
:
6432 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6433 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6434 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6435 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6436 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6437 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6438 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6439 case elfcpp::R_PPC64_TLSGD
:
6440 case elfcpp::R_PPC64_TLSLD
:
6441 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6444 case elfcpp::R_POWERPC_GOT16
:
6445 case elfcpp::R_POWERPC_GOT16_LO
:
6446 case elfcpp::R_POWERPC_GOT16_HI
:
6447 case elfcpp::R_POWERPC_GOT16_HA
:
6448 case elfcpp::R_PPC64_GOT16_DS
:
6449 case elfcpp::R_PPC64_GOT16_LO_DS
:
6451 // The symbol requires a GOT entry.
6452 Output_data_got_powerpc
<size
, big_endian
>* got
6453 = target
->got_section(symtab
, layout
);
6454 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6456 if (!parameters
->options().output_is_position_independent())
6459 && (size
== 32 || target
->abiversion() >= 2))
6460 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6462 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6464 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6466 // If we are generating a shared object or a pie, this
6467 // symbol's GOT entry will be set by a dynamic relocation.
6469 off
= got
->add_constant(0);
6470 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6472 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6474 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6475 : elfcpp::R_POWERPC_RELATIVE
);
6476 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6477 got
, off
, 0, false);
6482 case elfcpp::R_PPC64_TOC16
:
6483 case elfcpp::R_PPC64_TOC16_LO
:
6484 case elfcpp::R_PPC64_TOC16_HI
:
6485 case elfcpp::R_PPC64_TOC16_HA
:
6486 case elfcpp::R_PPC64_TOC16_DS
:
6487 case elfcpp::R_PPC64_TOC16_LO_DS
:
6488 // We need a GOT section.
6489 target
->got_section(symtab
, layout
);
6492 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6493 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6494 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6495 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6497 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6498 if (tls_type
== tls::TLSOPT_NONE
)
6500 Output_data_got_powerpc
<size
, big_endian
>* got
6501 = target
->got_section(symtab
, layout
);
6502 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6503 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6504 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6505 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6507 else if (tls_type
== tls::TLSOPT_TO_LE
)
6509 // no GOT relocs needed for Local Exec.
6516 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6517 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6518 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6519 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6521 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6522 if (tls_type
== tls::TLSOPT_NONE
)
6523 target
->tlsld_got_offset(symtab
, layout
, object
);
6524 else if (tls_type
== tls::TLSOPT_TO_LE
)
6526 // no GOT relocs needed for Local Exec.
6527 if (parameters
->options().emit_relocs())
6529 Output_section
* os
= layout
->tls_segment()->first_section();
6530 gold_assert(os
!= NULL
);
6531 os
->set_needs_symtab_index();
6539 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6540 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6541 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6542 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6544 Output_data_got_powerpc
<size
, big_endian
>* got
6545 = target
->got_section(symtab
, layout
);
6546 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6547 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6551 case elfcpp::R_POWERPC_GOT_TPREL16
:
6552 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6553 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6554 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6556 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6557 if (tls_type
== tls::TLSOPT_NONE
)
6559 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6560 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6562 Output_data_got_powerpc
<size
, big_endian
>* got
6563 = target
->got_section(symtab
, layout
);
6564 unsigned int off
= got
->add_constant(0);
6565 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6567 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6568 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6569 elfcpp::R_POWERPC_TPREL
,
6573 else if (tls_type
== tls::TLSOPT_TO_LE
)
6575 // no GOT relocs needed for Local Exec.
6583 unsupported_reloc_local(object
, r_type
);
6588 && parameters
->options().toc_optimize())
6590 if (data_shndx
== ppc_object
->toc_shndx())
6593 if (r_type
!= elfcpp::R_PPC64_ADDR64
6594 || (is_ifunc
&& target
->abiversion() < 2))
6596 else if (parameters
->options().output_is_position_independent())
6602 unsigned int shndx
= lsym
.get_st_shndx();
6603 if (shndx
>= elfcpp::SHN_LORESERVE
6604 && shndx
!= elfcpp::SHN_XINDEX
)
6609 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6612 enum {no_check
, check_lo
, check_ha
} insn_check
;
6616 insn_check
= no_check
;
6619 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6620 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6621 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6622 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6623 case elfcpp::R_POWERPC_GOT16_HA
:
6624 case elfcpp::R_PPC64_TOC16_HA
:
6625 insn_check
= check_ha
;
6628 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6629 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6630 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6631 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6632 case elfcpp::R_POWERPC_GOT16_LO
:
6633 case elfcpp::R_PPC64_GOT16_LO_DS
:
6634 case elfcpp::R_PPC64_TOC16_LO
:
6635 case elfcpp::R_PPC64_TOC16_LO_DS
:
6636 insn_check
= check_lo
;
6640 section_size_type slen
;
6641 const unsigned char* view
= NULL
;
6642 if (insn_check
!= no_check
)
6644 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6645 section_size_type off
=
6646 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6649 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6650 if (insn_check
== check_lo
6651 ? !ok_lo_toc_insn(insn
, r_type
)
6652 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6653 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6655 ppc_object
->set_no_toc_opt();
6656 gold_warning(_("%s: toc optimization is not supported "
6657 "for %#08x instruction"),
6658 ppc_object
->name().c_str(), insn
);
6667 case elfcpp::R_PPC64_TOC16
:
6668 case elfcpp::R_PPC64_TOC16_LO
:
6669 case elfcpp::R_PPC64_TOC16_HI
:
6670 case elfcpp::R_PPC64_TOC16_HA
:
6671 case elfcpp::R_PPC64_TOC16_DS
:
6672 case elfcpp::R_PPC64_TOC16_LO_DS
:
6673 unsigned int shndx
= lsym
.get_st_shndx();
6674 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6676 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6677 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6679 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_offset();
6680 if (dst_off
< ppc_object
->section_size(shndx
))
6683 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6685 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6687 // Need to check that the insn is a ld
6689 view
= ppc_object
->section_contents(data_shndx
,
6692 section_size_type off
=
6693 (convert_to_section_size_type(reloc
.get_r_offset())
6694 + (big_endian
? -2 : 3));
6696 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6700 ppc_object
->set_no_toc_opt(dst_off
);
6711 case elfcpp::R_POWERPC_REL32
:
6712 if (ppc_object
->got2_shndx() != 0
6713 && parameters
->options().output_is_position_independent())
6715 unsigned int shndx
= lsym
.get_st_shndx();
6716 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6718 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6719 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
6720 && (ppc_object
->section_flags(data_shndx
)
6721 & elfcpp::SHF_EXECINSTR
) != 0)
6722 gold_error(_("%s: unsupported -mbss-plt code"),
6723 ppc_object
->name().c_str());
6733 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6734 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6735 case elfcpp::R_POWERPC_GOT_TPREL16
:
6736 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6737 case elfcpp::R_POWERPC_GOT16
:
6738 case elfcpp::R_PPC64_GOT16_DS
:
6739 case elfcpp::R_PPC64_TOC16
:
6740 case elfcpp::R_PPC64_TOC16_DS
:
6741 ppc_object
->set_has_small_toc_reloc();
6747 // Report an unsupported relocation against a global symbol.
6749 template<int size
, bool big_endian
>
6751 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
6752 Sized_relobj_file
<size
, big_endian
>* object
,
6753 unsigned int r_type
,
6756 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
6757 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
6760 // Scan a relocation for a global symbol.
6762 template<int size
, bool big_endian
>
6764 Target_powerpc
<size
, big_endian
>::Scan::global(
6765 Symbol_table
* symtab
,
6767 Target_powerpc
<size
, big_endian
>* target
,
6768 Sized_relobj_file
<size
, big_endian
>* object
,
6769 unsigned int data_shndx
,
6770 Output_section
* output_section
,
6771 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6772 unsigned int r_type
,
6775 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
6778 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6779 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6781 this->expect_tls_get_addr_call();
6782 const bool final
= gsym
->final_value_is_known();
6783 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6784 if (tls_type
!= tls::TLSOPT_NONE
)
6785 this->skip_next_tls_get_addr_call();
6787 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6788 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6790 this->expect_tls_get_addr_call();
6791 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6792 if (tls_type
!= tls::TLSOPT_NONE
)
6793 this->skip_next_tls_get_addr_call();
6796 Powerpc_relobj
<size
, big_endian
>* ppc_object
6797 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6799 // A STT_GNU_IFUNC symbol may require a PLT entry.
6800 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
6801 bool pushed_ifunc
= false;
6802 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6804 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6805 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6806 r_type
, r_sym
, reloc
.get_r_addend());
6807 target
->make_plt_entry(symtab
, layout
, gsym
);
6808 pushed_ifunc
= true;
6813 case elfcpp::R_POWERPC_NONE
:
6814 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6815 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6816 case elfcpp::R_PPC_LOCAL24PC
:
6817 case elfcpp::R_POWERPC_TLS
:
6818 case elfcpp::R_PPC64_ENTRY
:
6821 case elfcpp::R_PPC64_TOC
:
6823 Output_data_got_powerpc
<size
, big_endian
>* got
6824 = target
->got_section(symtab
, layout
);
6825 if (parameters
->options().output_is_position_independent())
6827 Address off
= reloc
.get_r_offset();
6829 && data_shndx
== ppc_object
->opd_shndx()
6830 && ppc_object
->get_opd_discard(off
- 8))
6833 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6834 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6835 if (data_shndx
!= ppc_object
->opd_shndx())
6836 symobj
= static_cast
6837 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6838 rela_dyn
->add_output_section_relative(got
->output_section(),
6839 elfcpp::R_POWERPC_RELATIVE
,
6841 object
, data_shndx
, off
,
6842 symobj
->toc_base_offset());
6847 case elfcpp::R_PPC64_ADDR64
:
6849 && target
->abiversion() < 2
6850 && data_shndx
== ppc_object
->opd_shndx()
6851 && (gsym
->is_defined_in_discarded_section()
6852 || gsym
->object() != object
))
6854 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6858 case elfcpp::R_PPC64_UADDR64
:
6859 case elfcpp::R_POWERPC_ADDR32
:
6860 case elfcpp::R_POWERPC_UADDR32
:
6861 case elfcpp::R_POWERPC_ADDR24
:
6862 case elfcpp::R_POWERPC_ADDR16
:
6863 case elfcpp::R_POWERPC_ADDR16_LO
:
6864 case elfcpp::R_POWERPC_ADDR16_HI
:
6865 case elfcpp::R_POWERPC_ADDR16_HA
:
6866 case elfcpp::R_POWERPC_UADDR16
:
6867 case elfcpp::R_PPC64_ADDR16_HIGH
:
6868 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6869 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6870 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6871 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6872 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6873 case elfcpp::R_PPC64_ADDR16_DS
:
6874 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6875 case elfcpp::R_POWERPC_ADDR14
:
6876 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6877 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6879 // Make a PLT entry if necessary.
6880 if (gsym
->needs_plt_entry())
6882 // Since this is not a PC-relative relocation, we may be
6883 // taking the address of a function. In that case we need to
6884 // set the entry in the dynamic symbol table to the address of
6885 // the PLT call stub.
6886 bool need_ifunc_plt
= false;
6887 if ((size
== 32 || target
->abiversion() >= 2)
6888 && gsym
->is_from_dynobj()
6889 && !parameters
->options().output_is_position_independent())
6891 gsym
->set_needs_dynsym_value();
6892 need_ifunc_plt
= true;
6894 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6896 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6897 target
->push_branch(ppc_object
, data_shndx
,
6898 reloc
.get_r_offset(), r_type
, r_sym
,
6899 reloc
.get_r_addend());
6900 target
->make_plt_entry(symtab
, layout
, gsym
);
6903 // Make a dynamic relocation if necessary.
6904 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6905 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6907 if (!parameters
->options().output_is_position_independent()
6908 && gsym
->may_need_copy_reloc())
6910 target
->copy_reloc(symtab
, layout
, object
,
6911 data_shndx
, output_section
, gsym
, reloc
);
6913 else if ((((size
== 32
6914 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6916 && r_type
== elfcpp::R_PPC64_ADDR64
6917 && target
->abiversion() >= 2))
6918 && gsym
->can_use_relative_reloc(false)
6919 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6920 && parameters
->options().shared()))
6922 && r_type
== elfcpp::R_PPC64_ADDR64
6923 && target
->abiversion() < 2
6924 && (gsym
->can_use_relative_reloc(false)
6925 || data_shndx
== ppc_object
->opd_shndx())))
6927 Reloc_section
* rela_dyn
6928 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6929 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6930 : elfcpp::R_POWERPC_RELATIVE
);
6931 rela_dyn
->add_symbolless_global_addend(
6932 gsym
, dynrel
, output_section
, object
, data_shndx
,
6933 reloc
.get_r_offset(), reloc
.get_r_addend());
6937 Reloc_section
* rela_dyn
6938 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6939 check_non_pic(object
, r_type
);
6940 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6942 reloc
.get_r_offset(),
6943 reloc
.get_r_addend());
6946 && parameters
->options().toc_optimize()
6947 && data_shndx
== ppc_object
->toc_shndx())
6948 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6954 case elfcpp::R_PPC_PLTREL24
:
6955 case elfcpp::R_POWERPC_REL24
:
6958 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6959 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6960 r_type
, r_sym
, reloc
.get_r_addend());
6961 if (gsym
->needs_plt_entry()
6962 || (!gsym
->final_value_is_known()
6963 && (gsym
->is_undefined()
6964 || gsym
->is_from_dynobj()
6965 || gsym
->is_preemptible())))
6966 target
->make_plt_entry(symtab
, layout
, gsym
);
6970 case elfcpp::R_PPC64_REL64
:
6971 case elfcpp::R_POWERPC_REL32
:
6972 // Make a dynamic relocation if necessary.
6973 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6975 if (!parameters
->options().output_is_position_independent()
6976 && gsym
->may_need_copy_reloc())
6978 target
->copy_reloc(symtab
, layout
, object
,
6979 data_shndx
, output_section
, gsym
,
6984 Reloc_section
* rela_dyn
6985 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6986 check_non_pic(object
, r_type
);
6987 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6988 data_shndx
, reloc
.get_r_offset(),
6989 reloc
.get_r_addend());
6994 case elfcpp::R_POWERPC_REL14
:
6995 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6996 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6999 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7000 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7001 r_type
, r_sym
, reloc
.get_r_addend());
7005 case elfcpp::R_PPC64_TOCSAVE
:
7006 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7007 // caller has already saved r2 and thus a plt call stub need not
7010 && target
->mark_pltcall(ppc_object
, data_shndx
,
7011 reloc
.get_r_offset() - 4, symtab
))
7013 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7015 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7017 object
->error(_("tocsave symbol %u has bad shndx %u"),
7021 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7022 target
->add_tocsave(ppc_object
, shndx
,
7023 sym
->value() + reloc
.get_r_addend());
7028 case elfcpp::R_POWERPC_REL16
:
7029 case elfcpp::R_POWERPC_REL16_LO
:
7030 case elfcpp::R_POWERPC_REL16_HI
:
7031 case elfcpp::R_POWERPC_REL16_HA
:
7032 case elfcpp::R_POWERPC_REL16DX_HA
:
7033 case elfcpp::R_POWERPC_SECTOFF
:
7034 case elfcpp::R_POWERPC_SECTOFF_LO
:
7035 case elfcpp::R_POWERPC_SECTOFF_HI
:
7036 case elfcpp::R_POWERPC_SECTOFF_HA
:
7037 case elfcpp::R_PPC64_SECTOFF_DS
:
7038 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7039 case elfcpp::R_POWERPC_TPREL16
:
7040 case elfcpp::R_POWERPC_TPREL16_LO
:
7041 case elfcpp::R_POWERPC_TPREL16_HI
:
7042 case elfcpp::R_POWERPC_TPREL16_HA
:
7043 case elfcpp::R_PPC64_TPREL16_DS
:
7044 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7045 case elfcpp::R_PPC64_TPREL16_HIGH
:
7046 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7047 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7048 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7049 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7050 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7051 case elfcpp::R_POWERPC_DTPREL16
:
7052 case elfcpp::R_POWERPC_DTPREL16_LO
:
7053 case elfcpp::R_POWERPC_DTPREL16_HI
:
7054 case elfcpp::R_POWERPC_DTPREL16_HA
:
7055 case elfcpp::R_PPC64_DTPREL16_DS
:
7056 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7057 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7058 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7059 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7060 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7061 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7062 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7063 case elfcpp::R_PPC64_TLSGD
:
7064 case elfcpp::R_PPC64_TLSLD
:
7065 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7068 case elfcpp::R_POWERPC_GOT16
:
7069 case elfcpp::R_POWERPC_GOT16_LO
:
7070 case elfcpp::R_POWERPC_GOT16_HI
:
7071 case elfcpp::R_POWERPC_GOT16_HA
:
7072 case elfcpp::R_PPC64_GOT16_DS
:
7073 case elfcpp::R_PPC64_GOT16_LO_DS
:
7075 // The symbol requires a GOT entry.
7076 Output_data_got_powerpc
<size
, big_endian
>* got
;
7078 got
= target
->got_section(symtab
, layout
);
7079 if (gsym
->final_value_is_known())
7082 && (size
== 32 || target
->abiversion() >= 2))
7083 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7085 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7087 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7089 // If we are generating a shared object or a pie, this
7090 // symbol's GOT entry will be set by a dynamic relocation.
7091 unsigned int off
= got
->add_constant(0);
7092 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7094 Reloc_section
* rela_dyn
7095 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7097 if (gsym
->can_use_relative_reloc(false)
7099 || target
->abiversion() >= 2)
7100 && gsym
->visibility() == elfcpp::STV_PROTECTED
7101 && parameters
->options().shared()))
7103 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7104 : elfcpp::R_POWERPC_RELATIVE
);
7105 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7109 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7110 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7116 case elfcpp::R_PPC64_TOC16
:
7117 case elfcpp::R_PPC64_TOC16_LO
:
7118 case elfcpp::R_PPC64_TOC16_HI
:
7119 case elfcpp::R_PPC64_TOC16_HA
:
7120 case elfcpp::R_PPC64_TOC16_DS
:
7121 case elfcpp::R_PPC64_TOC16_LO_DS
:
7122 // We need a GOT section.
7123 target
->got_section(symtab
, layout
);
7126 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7127 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7128 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7129 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7131 const bool final
= gsym
->final_value_is_known();
7132 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7133 if (tls_type
== tls::TLSOPT_NONE
)
7135 Output_data_got_powerpc
<size
, big_endian
>* got
7136 = target
->got_section(symtab
, layout
);
7137 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7138 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7139 elfcpp::R_POWERPC_DTPMOD
,
7140 elfcpp::R_POWERPC_DTPREL
);
7142 else if (tls_type
== tls::TLSOPT_TO_IE
)
7144 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7146 Output_data_got_powerpc
<size
, big_endian
>* got
7147 = target
->got_section(symtab
, layout
);
7148 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7149 if (gsym
->is_undefined()
7150 || gsym
->is_from_dynobj())
7152 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7153 elfcpp::R_POWERPC_TPREL
);
7157 unsigned int off
= got
->add_constant(0);
7158 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7159 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7160 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7165 else if (tls_type
== tls::TLSOPT_TO_LE
)
7167 // no GOT relocs needed for Local Exec.
7174 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7175 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7176 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7177 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7179 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7180 if (tls_type
== tls::TLSOPT_NONE
)
7181 target
->tlsld_got_offset(symtab
, layout
, object
);
7182 else if (tls_type
== tls::TLSOPT_TO_LE
)
7184 // no GOT relocs needed for Local Exec.
7185 if (parameters
->options().emit_relocs())
7187 Output_section
* os
= layout
->tls_segment()->first_section();
7188 gold_assert(os
!= NULL
);
7189 os
->set_needs_symtab_index();
7197 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7198 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7199 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7200 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7202 Output_data_got_powerpc
<size
, big_endian
>* got
7203 = target
->got_section(symtab
, layout
);
7204 if (!gsym
->final_value_is_known()
7205 && (gsym
->is_from_dynobj()
7206 || gsym
->is_undefined()
7207 || gsym
->is_preemptible()))
7208 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7209 target
->rela_dyn_section(layout
),
7210 elfcpp::R_POWERPC_DTPREL
);
7212 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7216 case elfcpp::R_POWERPC_GOT_TPREL16
:
7217 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7218 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7219 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7221 const bool final
= gsym
->final_value_is_known();
7222 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7223 if (tls_type
== tls::TLSOPT_NONE
)
7225 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7227 Output_data_got_powerpc
<size
, big_endian
>* got
7228 = target
->got_section(symtab
, layout
);
7229 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7230 if (gsym
->is_undefined()
7231 || gsym
->is_from_dynobj())
7233 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7234 elfcpp::R_POWERPC_TPREL
);
7238 unsigned int off
= got
->add_constant(0);
7239 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7240 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7241 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7246 else if (tls_type
== tls::TLSOPT_TO_LE
)
7248 // no GOT relocs needed for Local Exec.
7256 unsupported_reloc_global(object
, r_type
, gsym
);
7261 && parameters
->options().toc_optimize())
7263 if (data_shndx
== ppc_object
->toc_shndx())
7266 if (r_type
!= elfcpp::R_PPC64_ADDR64
7267 || (is_ifunc
&& target
->abiversion() < 2))
7269 else if (parameters
->options().output_is_position_independent()
7270 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7273 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7276 enum {no_check
, check_lo
, check_ha
} insn_check
;
7280 insn_check
= no_check
;
7283 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7284 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7285 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7286 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7287 case elfcpp::R_POWERPC_GOT16_HA
:
7288 case elfcpp::R_PPC64_TOC16_HA
:
7289 insn_check
= check_ha
;
7292 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7293 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7294 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7295 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7296 case elfcpp::R_POWERPC_GOT16_LO
:
7297 case elfcpp::R_PPC64_GOT16_LO_DS
:
7298 case elfcpp::R_PPC64_TOC16_LO
:
7299 case elfcpp::R_PPC64_TOC16_LO_DS
:
7300 insn_check
= check_lo
;
7304 section_size_type slen
;
7305 const unsigned char* view
= NULL
;
7306 if (insn_check
!= no_check
)
7308 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7309 section_size_type off
=
7310 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7313 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7314 if (insn_check
== check_lo
7315 ? !ok_lo_toc_insn(insn
, r_type
)
7316 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7317 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7319 ppc_object
->set_no_toc_opt();
7320 gold_warning(_("%s: toc optimization is not supported "
7321 "for %#08x instruction"),
7322 ppc_object
->name().c_str(), insn
);
7331 case elfcpp::R_PPC64_TOC16
:
7332 case elfcpp::R_PPC64_TOC16_LO
:
7333 case elfcpp::R_PPC64_TOC16_HI
:
7334 case elfcpp::R_PPC64_TOC16_HA
:
7335 case elfcpp::R_PPC64_TOC16_DS
:
7336 case elfcpp::R_PPC64_TOC16_LO_DS
:
7337 if (gsym
->source() == Symbol::FROM_OBJECT
7338 && !gsym
->object()->is_dynamic())
7340 Powerpc_relobj
<size
, big_endian
>* sym_object
7341 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7343 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7344 if (shndx
== sym_object
->toc_shndx())
7346 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7347 Address dst_off
= sym
->value() + reloc
.get_r_offset();
7348 if (dst_off
< sym_object
->section_size(shndx
))
7351 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7353 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7355 // Need to check that the insn is a ld
7357 view
= ppc_object
->section_contents(data_shndx
,
7360 section_size_type off
=
7361 (convert_to_section_size_type(reloc
.get_r_offset())
7362 + (big_endian
? -2 : 3));
7364 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7368 sym_object
->set_no_toc_opt(dst_off
);
7380 case elfcpp::R_PPC_LOCAL24PC
:
7381 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7382 gold_error(_("%s: unsupported -mbss-plt code"),
7383 ppc_object
->name().c_str());
7392 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7393 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7394 case elfcpp::R_POWERPC_GOT_TPREL16
:
7395 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7396 case elfcpp::R_POWERPC_GOT16
:
7397 case elfcpp::R_PPC64_GOT16_DS
:
7398 case elfcpp::R_PPC64_TOC16
:
7399 case elfcpp::R_PPC64_TOC16_DS
:
7400 ppc_object
->set_has_small_toc_reloc();
7406 // Process relocations for gc.
7408 template<int size
, bool big_endian
>
7410 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
7411 Symbol_table
* symtab
,
7413 Sized_relobj_file
<size
, big_endian
>* object
,
7414 unsigned int data_shndx
,
7416 const unsigned char* prelocs
,
7418 Output_section
* output_section
,
7419 bool needs_special_offset_handling
,
7420 size_t local_symbol_count
,
7421 const unsigned char* plocal_symbols
)
7423 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7424 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7427 Powerpc_relobj
<size
, big_endian
>* ppc_object
7428 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7430 ppc_object
->set_opd_valid();
7431 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7433 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7434 for (p
= ppc_object
->access_from_map()->begin();
7435 p
!= ppc_object
->access_from_map()->end();
7438 Address dst_off
= p
->first
;
7439 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7440 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7441 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7443 Relobj
* src_obj
= s
->first
;
7444 unsigned int src_indx
= s
->second
;
7445 symtab
->gc()->add_reference(src_obj
, src_indx
,
7446 ppc_object
, dst_indx
);
7450 ppc_object
->access_from_map()->clear();
7451 ppc_object
->process_gc_mark(symtab
);
7452 // Don't look at .opd relocs as .opd will reference everything.
7456 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7465 needs_special_offset_handling
,
7470 // Handle target specific gc actions when adding a gc reference from
7471 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7472 // and DST_OFF. For powerpc64, this adds a referenc to the code
7473 // section of a function descriptor.
7475 template<int size
, bool big_endian
>
7477 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7478 Symbol_table
* symtab
,
7480 unsigned int src_shndx
,
7482 unsigned int dst_shndx
,
7483 Address dst_off
) const
7485 if (size
!= 64 || dst_obj
->is_dynamic())
7488 Powerpc_relobj
<size
, big_endian
>* ppc_object
7489 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7490 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7492 if (ppc_object
->opd_valid())
7494 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7495 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7499 // If we haven't run scan_opd_relocs, we must delay
7500 // processing this function descriptor reference.
7501 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7506 // Add any special sections for this symbol to the gc work list.
7507 // For powerpc64, this adds the code section of a function
7510 template<int size
, bool big_endian
>
7512 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7513 Symbol_table
* symtab
,
7518 Powerpc_relobj
<size
, big_endian
>* ppc_object
7519 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7521 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7522 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7524 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7525 Address dst_off
= gsym
->value();
7526 if (ppc_object
->opd_valid())
7528 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7529 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7533 ppc_object
->add_gc_mark(dst_off
);
7538 // For a symbol location in .opd, set LOC to the location of the
7541 template<int size
, bool big_endian
>
7543 Target_powerpc
<size
, big_endian
>::do_function_location(
7544 Symbol_location
* loc
) const
7546 if (size
== 64 && loc
->shndx
!= 0)
7548 if (loc
->object
->is_dynamic())
7550 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7551 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7552 if (loc
->shndx
== ppc_object
->opd_shndx())
7555 Address off
= loc
->offset
- ppc_object
->opd_address();
7556 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7557 loc
->offset
= dest_off
;
7562 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7563 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7564 if (loc
->shndx
== ppc_object
->opd_shndx())
7567 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7568 loc
->offset
= dest_off
;
7574 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7575 // compiled with -fsplit-stack. The function calls non-split-stack
7576 // code. Change the function to ensure it has enough stack space to
7577 // call some random function.
7579 template<int size
, bool big_endian
>
7581 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7584 section_offset_type fnoffset
,
7585 section_size_type fnsize
,
7586 const unsigned char* prelocs
,
7588 unsigned char* view
,
7589 section_size_type view_size
,
7591 std::string
* to
) const
7593 // 32-bit not supported.
7597 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7598 prelocs
, reloc_count
, view
, view_size
,
7603 // The function always starts with
7604 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7605 // addis %r12,%r1,-allocate@ha
7606 // addi %r12,%r12,-allocate@l
7608 // but note that the addis or addi may be replaced with a nop
7610 unsigned char *entry
= view
+ fnoffset
;
7611 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7613 if ((insn
& 0xffff0000) == addis_2_12
)
7615 /* Skip ELFv2 global entry code. */
7617 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7620 unsigned char *pinsn
= entry
;
7622 const uint32_t ld_private_ss
= 0xe80d8fc0;
7623 if (insn
== ld_private_ss
)
7625 int32_t allocate
= 0;
7629 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7630 if ((insn
& 0xffff0000) == addis_12_1
)
7631 allocate
+= (insn
& 0xffff) << 16;
7632 else if ((insn
& 0xffff0000) == addi_12_1
7633 || (insn
& 0xffff0000) == addi_12_12
)
7634 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7635 else if (insn
!= nop
)
7638 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7640 int extra
= parameters
->options().split_stack_adjust_size();
7642 if (allocate
>= 0 || extra
< 0)
7644 object
->error(_("split-stack stack size overflow at "
7645 "section %u offset %0zx"),
7646 shndx
, static_cast<size_t>(fnoffset
));
7650 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7651 if (insn
!= addis_12_1
)
7653 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7655 insn
= addi_12_12
| (allocate
& 0xffff);
7656 if (insn
!= addi_12_12
)
7658 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7664 insn
= addi_12_1
| (allocate
& 0xffff);
7665 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7668 if (pinsn
!= entry
+ 12)
7669 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7677 if (!object
->has_no_split_stack())
7678 object
->error(_("failed to match split-stack sequence at "
7679 "section %u offset %0zx"),
7680 shndx
, static_cast<size_t>(fnoffset
));
7684 // Scan relocations for a section.
7686 template<int size
, bool big_endian
>
7688 Target_powerpc
<size
, big_endian
>::scan_relocs(
7689 Symbol_table
* symtab
,
7691 Sized_relobj_file
<size
, big_endian
>* object
,
7692 unsigned int data_shndx
,
7693 unsigned int sh_type
,
7694 const unsigned char* prelocs
,
7696 Output_section
* output_section
,
7697 bool needs_special_offset_handling
,
7698 size_t local_symbol_count
,
7699 const unsigned char* plocal_symbols
)
7701 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7702 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7705 if (!this->plt_localentry0_init_
)
7707 bool plt_localentry0
= false;
7709 && this->abiversion() >= 2)
7711 if (parameters
->options().user_set_plt_localentry())
7712 plt_localentry0
= parameters
->options().plt_localentry();
7714 && symtab
->lookup("GLIBC_2.26", NULL
) == NULL
)
7715 gold_warning(_("--plt-localentry is especially dangerous without "
7716 "ld.so support to detect ABI violations"));
7718 this->plt_localentry0_
= plt_localentry0
;
7719 this->plt_localentry0_init_
= true;
7722 if (sh_type
== elfcpp::SHT_REL
)
7724 gold_error(_("%s: unsupported REL reloc section"),
7725 object
->name().c_str());
7729 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7738 needs_special_offset_handling
,
7743 // Functor class for processing the global symbol table.
7744 // Removes symbols defined on discarded opd entries.
7746 template<bool big_endian
>
7747 class Global_symbol_visitor_opd
7750 Global_symbol_visitor_opd()
7754 operator()(Sized_symbol
<64>* sym
)
7756 if (sym
->has_symtab_index()
7757 || sym
->source() != Symbol::FROM_OBJECT
7758 || !sym
->in_real_elf())
7761 if (sym
->object()->is_dynamic())
7764 Powerpc_relobj
<64, big_endian
>* symobj
7765 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
7766 if (symobj
->opd_shndx() == 0)
7770 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7771 if (shndx
== symobj
->opd_shndx()
7772 && symobj
->get_opd_discard(sym
->value()))
7774 sym
->set_undefined();
7775 sym
->set_visibility(elfcpp::STV_DEFAULT
);
7776 sym
->set_is_defined_in_discarded_section();
7777 sym
->set_symtab_index(-1U);
7782 template<int size
, bool big_endian
>
7784 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
7786 Symbol_table
* symtab
)
7790 Output_data_save_res
<size
, big_endian
>* savres
7791 = new Output_data_save_res
<size
, big_endian
>(symtab
);
7792 this->savres_section_
= savres
;
7793 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
7794 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
7795 savres
, ORDER_TEXT
, false);
7799 // Sort linker created .got section first (for the header), then input
7800 // sections belonging to files using small model code.
7802 template<bool big_endian
>
7803 class Sort_toc_sections
7807 operator()(const Output_section::Input_section
& is1
,
7808 const Output_section::Input_section
& is2
) const
7810 if (!is1
.is_input_section() && is2
.is_input_section())
7813 = (is1
.is_input_section()
7814 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
7815 ->has_small_toc_reloc()));
7817 = (is2
.is_input_section()
7818 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
7819 ->has_small_toc_reloc()));
7820 return small1
&& !small2
;
7824 // Finalize the sections.
7826 template<int size
, bool big_endian
>
7828 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
7830 const Input_objects
*,
7831 Symbol_table
* symtab
)
7833 if (parameters
->doing_static_link())
7835 // At least some versions of glibc elf-init.o have a strong
7836 // reference to __rela_iplt marker syms. A weak ref would be
7838 if (this->iplt_
!= NULL
)
7840 Reloc_section
* rel
= this->iplt_
->rel_plt();
7841 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
7842 Symbol_table::PREDEFINED
, rel
, 0, 0,
7843 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7844 elfcpp::STV_HIDDEN
, 0, false, true);
7845 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
7846 Symbol_table::PREDEFINED
, rel
, 0, 0,
7847 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7848 elfcpp::STV_HIDDEN
, 0, true, true);
7852 symtab
->define_as_constant("__rela_iplt_start", NULL
,
7853 Symbol_table::PREDEFINED
, 0, 0,
7854 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7855 elfcpp::STV_HIDDEN
, 0, true, false);
7856 symtab
->define_as_constant("__rela_iplt_end", NULL
,
7857 Symbol_table::PREDEFINED
, 0, 0,
7858 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7859 elfcpp::STV_HIDDEN
, 0, true, false);
7865 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
7866 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
7868 if (!parameters
->options().relocatable())
7870 this->define_save_restore_funcs(layout
, symtab
);
7872 // Annoyingly, we need to make these sections now whether or
7873 // not we need them. If we delay until do_relax then we
7874 // need to mess with the relaxation machinery checkpointing.
7875 this->got_section(symtab
, layout
);
7876 this->make_brlt_section(layout
);
7878 if (parameters
->options().toc_sort())
7880 Output_section
* os
= this->got_
->output_section();
7881 if (os
!= NULL
&& os
->input_sections().size() > 1)
7882 std::stable_sort(os
->input_sections().begin(),
7883 os
->input_sections().end(),
7884 Sort_toc_sections
<big_endian
>());
7889 // Fill in some more dynamic tags.
7890 Output_data_dynamic
* odyn
= layout
->dynamic_data();
7893 const Reloc_section
* rel_plt
= (this->plt_
== NULL
7895 : this->plt_
->rel_plt());
7896 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
7897 this->rela_dyn_
, true, size
== 32);
7901 if (this->got_
!= NULL
)
7903 this->got_
->finalize_data_size();
7904 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
7905 this->got_
, this->got_
->g_o_t());
7910 if (this->glink_
!= NULL
)
7912 this->glink_
->finalize_data_size();
7913 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
7915 (this->glink_
->pltresolve_size
7918 if (this->has_localentry0_
)
7919 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
7920 elfcpp::PPC64_OPT_LOCALENTRY
);
7924 // Emit any relocs we saved in an attempt to avoid generating COPY
7926 if (this->copy_relocs_
.any_saved_relocs())
7927 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
7930 // Emit any saved relocs, and mark toc entries using any of these
7931 // relocs as not optimizable.
7933 template<int sh_type
, int size
, bool big_endian
>
7935 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
7936 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
7939 && parameters
->options().toc_optimize())
7941 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
7942 Copy_reloc_entries::iterator p
= this->entries_
.begin();
7943 p
!= this->entries_
.end();
7946 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
7949 // If the symbol is no longer defined in a dynamic object,
7950 // then we emitted a COPY relocation. If it is still
7951 // dynamic then we'll need dynamic relocations and thus
7952 // can't optimize toc entries.
7953 if (entry
.sym_
->is_from_dynobj())
7955 Powerpc_relobj
<size
, big_endian
>* ppc_object
7956 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
7957 if (entry
.shndx_
== ppc_object
->toc_shndx())
7958 ppc_object
->set_no_toc_opt(entry
.address_
);
7963 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
7966 // Return the value to use for a branch relocation.
7968 template<int size
, bool big_endian
>
7970 Target_powerpc
<size
, big_endian
>::symval_for_branch(
7971 const Symbol_table
* symtab
,
7972 const Sized_symbol
<size
>* gsym
,
7973 Powerpc_relobj
<size
, big_endian
>* object
,
7975 unsigned int *dest_shndx
)
7977 if (size
== 32 || this->abiversion() >= 2)
7981 // If the symbol is defined in an opd section, ie. is a function
7982 // descriptor, use the function descriptor code entry address
7983 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
7985 && (gsym
->source() != Symbol::FROM_OBJECT
7986 || gsym
->object()->is_dynamic()))
7989 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7990 unsigned int shndx
= symobj
->opd_shndx();
7993 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
7994 if (opd_addr
== invalid_address
)
7996 opd_addr
+= symobj
->output_section_address(shndx
);
7997 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
8000 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
8001 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
8004 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
8005 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
8006 *dest_shndx
= folded
.second
;
8008 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
8009 if (sec_addr
== invalid_address
)
8012 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
8013 *value
= sec_addr
+ sec_off
;
8018 // Perform a relocation.
8020 template<int size
, bool big_endian
>
8022 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
8023 const Relocate_info
<size
, big_endian
>* relinfo
,
8025 Target_powerpc
* target
,
8028 const unsigned char* preloc
,
8029 const Sized_symbol
<size
>* gsym
,
8030 const Symbol_value
<size
>* psymval
,
8031 unsigned char* view
,
8033 section_size_type view_size
)
8038 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
8039 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
8040 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
8042 case Track_tls::NOT_EXPECTED
:
8043 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8044 _("__tls_get_addr call lacks marker reloc"));
8046 case Track_tls::EXPECTED
:
8047 // We have already complained.
8049 case Track_tls::SKIP
:
8051 case Track_tls::NORMAL
:
8055 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8056 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8057 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8058 // Offset from start of insn to d-field reloc.
8059 const int d_offset
= big_endian
? 2 : 0;
8061 Powerpc_relobj
<size
, big_endian
>* const object
8062 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8064 bool has_stub_value
= false;
8065 bool localentry0
= false;
8066 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8068 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8069 : object
->local_has_plt_offset(r_sym
))
8070 && (!psymval
->is_ifunc_symbol()
8071 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8075 && target
->abiversion() >= 2
8076 && !parameters
->options().output_is_position_independent()
8077 && !is_branch_reloc(r_type
))
8079 Address off
= target
->glink_section()->find_global_entry(gsym
);
8080 if (off
!= invalid_address
)
8082 value
= target
->glink_section()->global_entry_address() + off
;
8083 has_stub_value
= true;
8088 Stub_table
<size
, big_endian
>* stub_table
8089 = object
->stub_table(relinfo
->data_shndx
);
8090 if (stub_table
== NULL
)
8092 // This is a ref from a data section to an ifunc symbol.
8093 if (target
->stub_tables().size() != 0)
8094 stub_table
= target
->stub_tables()[0];
8096 if (stub_table
!= NULL
)
8098 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8100 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8101 rela
.get_r_addend());
8103 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8104 rela
.get_r_addend());
8107 value
= stub_table
->stub_address() + ent
->off_
;
8108 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8109 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8110 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8113 && relnum
+ 1 < reloc_count
)
8115 Reltype
next_rela(preloc
+ reloc_size
);
8116 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8117 == elfcpp::R_PPC64_TOCSAVE
8118 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8121 localentry0
= ent
->localentry0_
;
8122 has_stub_value
= true;
8126 // We don't care too much about bogus debug references to
8127 // non-local functions, but otherwise there had better be a plt
8128 // call stub or global entry stub as appropriate.
8129 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
8132 if (r_type
== elfcpp::R_POWERPC_GOT16
8133 || r_type
== elfcpp::R_POWERPC_GOT16_LO
8134 || r_type
== elfcpp::R_POWERPC_GOT16_HI
8135 || r_type
== elfcpp::R_POWERPC_GOT16_HA
8136 || r_type
== elfcpp::R_PPC64_GOT16_DS
8137 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
8141 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
8142 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
8146 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
8147 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
8149 value
-= target
->got_section()->got_base_offset(object
);
8151 else if (r_type
== elfcpp::R_PPC64_TOC
)
8153 value
= (target
->got_section()->output_section()->address()
8154 + object
->toc_base_offset());
8156 else if (gsym
!= NULL
8157 && (r_type
== elfcpp::R_POWERPC_REL24
8158 || r_type
== elfcpp::R_PPC_PLTREL24
)
8163 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
8164 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
8165 bool can_plt_call
= localentry0
;
8166 if (!localentry0
&& rela
.get_r_offset() + 8 <= view_size
)
8168 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
8169 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
8172 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
8174 elfcpp::Swap
<32, big_endian
>::
8175 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
8176 can_plt_call
= true;
8181 // If we don't have a branch and link followed by a nop,
8182 // we can't go via the plt because there is no place to
8183 // put a toc restoring instruction.
8184 // Unless we know we won't be returning.
8185 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
8186 can_plt_call
= true;
8190 // g++ as of 20130507 emits self-calls without a
8191 // following nop. This is arguably wrong since we have
8192 // conflicting information. On the one hand a global
8193 // symbol and on the other a local call sequence, but
8194 // don't error for this special case.
8195 // It isn't possible to cheaply verify we have exactly
8196 // such a call. Allow all calls to the same section.
8198 Address code
= value
;
8199 if (gsym
->source() == Symbol::FROM_OBJECT
8200 && gsym
->object() == object
)
8202 unsigned int dest_shndx
= 0;
8203 if (target
->abiversion() < 2)
8205 Address addend
= rela
.get_r_addend();
8206 code
= psymval
->value(object
, addend
);
8207 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8208 &code
, &dest_shndx
);
8211 if (dest_shndx
== 0)
8212 dest_shndx
= gsym
->shndx(&is_ordinary
);
8213 ok
= dest_shndx
== relinfo
->data_shndx
;
8217 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8218 _("call lacks nop, can't restore toc; "
8219 "recompile with -fPIC"));
8225 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8226 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8227 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8228 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8230 // First instruction of a global dynamic sequence, arg setup insn.
8231 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8232 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8233 enum Got_type got_type
= GOT_TYPE_STANDARD
;
8234 if (tls_type
== tls::TLSOPT_NONE
)
8235 got_type
= GOT_TYPE_TLSGD
;
8236 else if (tls_type
== tls::TLSOPT_TO_IE
)
8237 got_type
= GOT_TYPE_TPREL
;
8238 if (got_type
!= GOT_TYPE_STANDARD
)
8242 gold_assert(gsym
->has_got_offset(got_type
));
8243 value
= gsym
->got_offset(got_type
);
8247 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
8248 value
= object
->local_got_offset(r_sym
, got_type
);
8250 value
-= target
->got_section()->got_base_offset(object
);
8252 if (tls_type
== tls::TLSOPT_TO_IE
)
8254 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8255 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8257 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8258 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8259 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
8261 insn
|= 32 << 26; // lwz
8263 insn
|= 58 << 26; // ld
8264 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8266 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8267 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8269 else if (tls_type
== tls::TLSOPT_TO_LE
)
8271 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8272 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8274 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8275 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8276 insn
&= (1 << 26) - (1 << 21); // extract rt
8281 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8282 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8283 value
= psymval
->value(object
, rela
.get_r_addend());
8287 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8289 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8290 r_type
= elfcpp::R_POWERPC_NONE
;
8294 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8295 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8296 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8297 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8299 // First instruction of a local dynamic sequence, arg setup insn.
8300 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8301 if (tls_type
== tls::TLSOPT_NONE
)
8303 value
= target
->tlsld_got_offset();
8304 value
-= target
->got_section()->got_base_offset(object
);
8308 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8309 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8310 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8312 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8313 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8314 insn
&= (1 << 26) - (1 << 21); // extract rt
8319 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8320 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8325 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8327 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8328 r_type
= elfcpp::R_POWERPC_NONE
;
8332 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
8333 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
8334 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
8335 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
8337 // Accesses relative to a local dynamic sequence address,
8338 // no optimisation here.
8341 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
8342 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
8346 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
8347 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
8349 value
-= target
->got_section()->got_base_offset(object
);
8351 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8352 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8353 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8354 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8356 // First instruction of initial exec sequence.
8357 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8358 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8359 if (tls_type
== tls::TLSOPT_NONE
)
8363 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
8364 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
8368 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
8369 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
8371 value
-= target
->got_section()->got_base_offset(object
);
8375 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8376 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8377 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8379 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8380 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8381 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
8386 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8387 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8388 value
= psymval
->value(object
, rela
.get_r_addend());
8392 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8394 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8395 r_type
= elfcpp::R_POWERPC_NONE
;
8399 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8400 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8402 // Second instruction of a global dynamic sequence,
8403 // the __tls_get_addr call
8404 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8405 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8406 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8407 if (tls_type
!= tls::TLSOPT_NONE
)
8409 if (tls_type
== tls::TLSOPT_TO_IE
)
8411 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8412 Insn insn
= add_3_3_13
;
8415 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8416 r_type
= elfcpp::R_POWERPC_NONE
;
8420 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8421 Insn insn
= addi_3_3
;
8422 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8423 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8425 value
= psymval
->value(object
, rela
.get_r_addend());
8427 this->skip_next_tls_get_addr_call();
8430 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8431 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8433 // Second instruction of a local dynamic sequence,
8434 // the __tls_get_addr call
8435 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8436 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8437 if (tls_type
== tls::TLSOPT_TO_LE
)
8439 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8440 Insn insn
= addi_3_3
;
8441 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8442 this->skip_next_tls_get_addr_call();
8443 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8448 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8450 // Second instruction of an initial exec sequence
8451 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8452 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8453 if (tls_type
== tls::TLSOPT_TO_LE
)
8455 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8456 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8457 unsigned int reg
= size
== 32 ? 2 : 13;
8458 insn
= at_tls_transform(insn
, reg
);
8459 gold_assert(insn
!= 0);
8460 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8461 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8463 value
= psymval
->value(object
, rela
.get_r_addend());
8466 else if (!has_stub_value
)
8469 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8470 addend
= rela
.get_r_addend();
8471 value
= psymval
->value(object
, addend
);
8472 if (size
== 64 && is_branch_reloc(r_type
))
8474 if (target
->abiversion() >= 2)
8477 value
+= object
->ppc64_local_entry_offset(gsym
);
8479 value
+= object
->ppc64_local_entry_offset(r_sym
);
8483 unsigned int dest_shndx
;
8484 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8485 &value
, &dest_shndx
);
8488 Address max_branch_offset
= max_branch_delta(r_type
);
8489 if (max_branch_offset
!= 0
8490 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8492 Stub_table
<size
, big_endian
>* stub_table
8493 = object
->stub_table(relinfo
->data_shndx
);
8494 if (stub_table
!= NULL
)
8496 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8497 if (off
!= invalid_address
)
8499 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8501 has_stub_value
= true;
8509 case elfcpp::R_PPC64_REL64
:
8510 case elfcpp::R_POWERPC_REL32
:
8511 case elfcpp::R_POWERPC_REL24
:
8512 case elfcpp::R_PPC_PLTREL24
:
8513 case elfcpp::R_PPC_LOCAL24PC
:
8514 case elfcpp::R_POWERPC_REL16
:
8515 case elfcpp::R_POWERPC_REL16_LO
:
8516 case elfcpp::R_POWERPC_REL16_HI
:
8517 case elfcpp::R_POWERPC_REL16_HA
:
8518 case elfcpp::R_POWERPC_REL16DX_HA
:
8519 case elfcpp::R_POWERPC_REL14
:
8520 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8521 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8525 case elfcpp::R_PPC64_TOC16
:
8526 case elfcpp::R_PPC64_TOC16_LO
:
8527 case elfcpp::R_PPC64_TOC16_HI
:
8528 case elfcpp::R_PPC64_TOC16_HA
:
8529 case elfcpp::R_PPC64_TOC16_DS
:
8530 case elfcpp::R_PPC64_TOC16_LO_DS
:
8531 // Subtract the TOC base address.
8532 value
-= (target
->got_section()->output_section()->address()
8533 + object
->toc_base_offset());
8536 case elfcpp::R_POWERPC_SECTOFF
:
8537 case elfcpp::R_POWERPC_SECTOFF_LO
:
8538 case elfcpp::R_POWERPC_SECTOFF_HI
:
8539 case elfcpp::R_POWERPC_SECTOFF_HA
:
8540 case elfcpp::R_PPC64_SECTOFF_DS
:
8541 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8543 value
-= os
->address();
8546 case elfcpp::R_PPC64_TPREL16_DS
:
8547 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8548 case elfcpp::R_PPC64_TPREL16_HIGH
:
8549 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8551 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8554 case elfcpp::R_POWERPC_TPREL16
:
8555 case elfcpp::R_POWERPC_TPREL16_LO
:
8556 case elfcpp::R_POWERPC_TPREL16_HI
:
8557 case elfcpp::R_POWERPC_TPREL16_HA
:
8558 case elfcpp::R_POWERPC_TPREL
:
8559 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8560 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8561 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8562 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8563 // tls symbol values are relative to tls_segment()->vaddr()
8567 case elfcpp::R_PPC64_DTPREL16_DS
:
8568 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8569 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8570 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8571 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8572 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8574 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8575 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8578 case elfcpp::R_POWERPC_DTPREL16
:
8579 case elfcpp::R_POWERPC_DTPREL16_LO
:
8580 case elfcpp::R_POWERPC_DTPREL16_HI
:
8581 case elfcpp::R_POWERPC_DTPREL16_HA
:
8582 case elfcpp::R_POWERPC_DTPREL
:
8583 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8584 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8585 // tls symbol values are relative to tls_segment()->vaddr()
8586 value
-= dtp_offset
;
8589 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8591 value
+= object
->ppc64_local_entry_offset(gsym
);
8593 value
+= object
->ppc64_local_entry_offset(r_sym
);
8600 Insn branch_bit
= 0;
8603 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8604 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8605 branch_bit
= 1 << 21;
8607 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8608 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8610 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8611 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8614 if (this->is_isa_v2
)
8616 // Set 'a' bit. This is 0b00010 in BO field for branch
8617 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8618 // for branch on CTR insns (BO == 1a00t or 1a01t).
8619 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8621 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8628 // Invert 'y' bit if not the default.
8629 if (static_cast<Signed_address
>(value
) < 0)
8632 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8647 // Multi-instruction sequences that access the GOT/TOC can
8648 // be optimized, eg.
8649 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8650 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8652 // addis ra,r2,0; addi rb,ra,x@toc@l;
8653 // to nop; addi rb,r2,x@toc;
8654 // FIXME: the @got sequence shown above is not yet
8655 // optimized. Note that gcc as of 2017-01-07 doesn't use
8656 // the ELF @got relocs except for TLS, instead using the
8657 // PowerOpen variant of a compiler managed GOT (called TOC).
8658 // The PowerOpen TOC sequence equivalent to the first
8659 // example is optimized.
8660 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8661 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8662 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8663 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8664 case elfcpp::R_POWERPC_GOT16_HA
:
8665 case elfcpp::R_PPC64_TOC16_HA
:
8666 if (parameters
->options().toc_optimize())
8668 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8669 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8670 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8671 && object
->make_toc_relative(target
, &value
))
8673 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8674 == ((15u << 26) | (2 << 16)));
8676 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8677 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8678 && value
+ 0x8000 < 0x10000)
8680 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8686 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8687 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8688 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8689 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8690 case elfcpp::R_POWERPC_GOT16_LO
:
8691 case elfcpp::R_PPC64_GOT16_LO_DS
:
8692 case elfcpp::R_PPC64_TOC16_LO
:
8693 case elfcpp::R_PPC64_TOC16_LO_DS
:
8694 if (parameters
->options().toc_optimize())
8696 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8697 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8698 bool changed
= false;
8699 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
8700 && object
->make_toc_relative(target
, &value
))
8702 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
8703 insn
^= (14u << 26) ^ (58u << 26);
8704 r_type
= elfcpp::R_PPC64_TOC16_LO
;
8707 if (ok_lo_toc_insn(insn
, r_type
)
8708 && value
+ 0x8000 < 0x10000)
8710 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
8712 // Transform addic to addi when we change reg.
8713 insn
&= ~((0x3f << 26) | (0x1f << 16));
8714 insn
|= (14u << 26) | (2 << 16);
8718 insn
&= ~(0x1f << 16);
8724 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8728 case elfcpp::R_PPC64_ENTRY
:
8729 value
= (target
->got_section()->output_section()->address()
8730 + object
->toc_base_offset());
8731 if (value
+ 0x80008000 <= 0xffffffff
8732 && !parameters
->options().output_is_position_independent())
8734 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8735 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8736 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8738 if ((insn1
& ~0xfffc) == ld_2_12
8739 && insn2
== add_2_2_12
)
8741 insn1
= lis_2
+ ha(value
);
8742 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8743 insn2
= addi_2_2
+ l(value
);
8744 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8751 if (value
+ 0x80008000 <= 0xffffffff)
8753 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8754 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8755 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8757 if ((insn1
& ~0xfffc) == ld_2_12
8758 && insn2
== add_2_2_12
)
8760 insn1
= addis_2_12
+ ha(value
);
8761 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8762 insn2
= addi_2_2
+ l(value
);
8763 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8770 case elfcpp::R_POWERPC_REL16_LO
:
8771 // If we are generating a non-PIC executable, edit
8772 // 0: addis 2,12,.TOC.-0b@ha
8773 // addi 2,2,.TOC.-0b@l
8774 // used by ELFv2 global entry points to set up r2, to
8777 // if .TOC. is in range. */
8778 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
8781 && target
->abiversion() >= 2
8782 && !parameters
->options().output_is_position_independent()
8783 && rela
.get_r_addend() == d_offset
+ 4
8785 && strcmp(gsym
->name(), ".TOC.") == 0)
8787 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8788 Reltype
prev_rela(preloc
- reloc_size
);
8789 if ((prev_rela
.get_r_info()
8790 == elfcpp::elf_r_info
<size
>(r_sym
,
8791 elfcpp::R_POWERPC_REL16_HA
))
8792 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
8793 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
8795 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8796 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
8797 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8799 if ((insn1
& 0xffff0000) == addis_2_12
8800 && (insn2
& 0xffff0000) == addi_2_2
)
8802 insn1
= lis_2
+ ha(value
+ address
- 4);
8803 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
8804 insn2
= addi_2_2
+ l(value
+ address
- 4);
8805 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
8808 relinfo
->rr
->set_strategy(relnum
- 1,
8809 Relocatable_relocs::RELOC_SPECIAL
);
8810 relinfo
->rr
->set_strategy(relnum
,
8811 Relocatable_relocs::RELOC_SPECIAL
);
8821 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
8822 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
8825 case elfcpp::R_POWERPC_ADDR32
:
8826 case elfcpp::R_POWERPC_UADDR32
:
8828 overflow
= Reloc::CHECK_BITFIELD
;
8831 case elfcpp::R_POWERPC_REL32
:
8832 case elfcpp::R_POWERPC_REL16DX_HA
:
8834 overflow
= Reloc::CHECK_SIGNED
;
8837 case elfcpp::R_POWERPC_UADDR16
:
8838 overflow
= Reloc::CHECK_BITFIELD
;
8841 case elfcpp::R_POWERPC_ADDR16
:
8842 // We really should have three separate relocations,
8843 // one for 16-bit data, one for insns with 16-bit signed fields,
8844 // and one for insns with 16-bit unsigned fields.
8845 overflow
= Reloc::CHECK_BITFIELD
;
8846 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
8847 overflow
= Reloc::CHECK_LOW_INSN
;
8850 case elfcpp::R_POWERPC_ADDR16_HI
:
8851 case elfcpp::R_POWERPC_ADDR16_HA
:
8852 case elfcpp::R_POWERPC_GOT16_HI
:
8853 case elfcpp::R_POWERPC_GOT16_HA
:
8854 case elfcpp::R_POWERPC_PLT16_HI
:
8855 case elfcpp::R_POWERPC_PLT16_HA
:
8856 case elfcpp::R_POWERPC_SECTOFF_HI
:
8857 case elfcpp::R_POWERPC_SECTOFF_HA
:
8858 case elfcpp::R_PPC64_TOC16_HI
:
8859 case elfcpp::R_PPC64_TOC16_HA
:
8860 case elfcpp::R_PPC64_PLTGOT16_HI
:
8861 case elfcpp::R_PPC64_PLTGOT16_HA
:
8862 case elfcpp::R_POWERPC_TPREL16_HI
:
8863 case elfcpp::R_POWERPC_TPREL16_HA
:
8864 case elfcpp::R_POWERPC_DTPREL16_HI
:
8865 case elfcpp::R_POWERPC_DTPREL16_HA
:
8866 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8867 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8868 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8869 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8870 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8871 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8872 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8873 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8874 case elfcpp::R_POWERPC_REL16_HI
:
8875 case elfcpp::R_POWERPC_REL16_HA
:
8877 overflow
= Reloc::CHECK_HIGH_INSN
;
8880 case elfcpp::R_POWERPC_REL16
:
8881 case elfcpp::R_PPC64_TOC16
:
8882 case elfcpp::R_POWERPC_GOT16
:
8883 case elfcpp::R_POWERPC_SECTOFF
:
8884 case elfcpp::R_POWERPC_TPREL16
:
8885 case elfcpp::R_POWERPC_DTPREL16
:
8886 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8887 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8888 case elfcpp::R_POWERPC_GOT_TPREL16
:
8889 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8890 overflow
= Reloc::CHECK_LOW_INSN
;
8893 case elfcpp::R_POWERPC_ADDR24
:
8894 case elfcpp::R_POWERPC_ADDR14
:
8895 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8896 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8897 case elfcpp::R_PPC64_ADDR16_DS
:
8898 case elfcpp::R_POWERPC_REL24
:
8899 case elfcpp::R_PPC_PLTREL24
:
8900 case elfcpp::R_PPC_LOCAL24PC
:
8901 case elfcpp::R_PPC64_TPREL16_DS
:
8902 case elfcpp::R_PPC64_DTPREL16_DS
:
8903 case elfcpp::R_PPC64_TOC16_DS
:
8904 case elfcpp::R_PPC64_GOT16_DS
:
8905 case elfcpp::R_PPC64_SECTOFF_DS
:
8906 case elfcpp::R_POWERPC_REL14
:
8907 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8908 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8909 overflow
= Reloc::CHECK_SIGNED
;
8913 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8916 if (overflow
== Reloc::CHECK_LOW_INSN
8917 || overflow
== Reloc::CHECK_HIGH_INSN
)
8919 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8921 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
8922 overflow
= Reloc::CHECK_BITFIELD
;
8923 else if (overflow
== Reloc::CHECK_LOW_INSN
8924 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
8925 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
8926 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
8927 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
8928 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
8929 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
8930 overflow
= Reloc::CHECK_UNSIGNED
;
8932 overflow
= Reloc::CHECK_SIGNED
;
8935 bool maybe_dq_reloc
= false;
8936 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
8937 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
8940 case elfcpp::R_POWERPC_NONE
:
8941 case elfcpp::R_POWERPC_TLS
:
8942 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
8943 case elfcpp::R_POWERPC_GNU_VTENTRY
:
8946 case elfcpp::R_PPC64_ADDR64
:
8947 case elfcpp::R_PPC64_REL64
:
8948 case elfcpp::R_PPC64_TOC
:
8949 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8950 Reloc::addr64(view
, value
);
8953 case elfcpp::R_POWERPC_TPREL
:
8954 case elfcpp::R_POWERPC_DTPREL
:
8956 Reloc::addr64(view
, value
);
8958 status
= Reloc::addr32(view
, value
, overflow
);
8961 case elfcpp::R_PPC64_UADDR64
:
8962 Reloc::addr64_u(view
, value
);
8965 case elfcpp::R_POWERPC_ADDR32
:
8966 status
= Reloc::addr32(view
, value
, overflow
);
8969 case elfcpp::R_POWERPC_REL32
:
8970 case elfcpp::R_POWERPC_UADDR32
:
8971 status
= Reloc::addr32_u(view
, value
, overflow
);
8974 case elfcpp::R_POWERPC_ADDR24
:
8975 case elfcpp::R_POWERPC_REL24
:
8976 case elfcpp::R_PPC_PLTREL24
:
8977 case elfcpp::R_PPC_LOCAL24PC
:
8978 status
= Reloc::addr24(view
, value
, overflow
);
8981 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8982 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8983 case elfcpp::R_POWERPC_GOT_TPREL16
:
8984 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8987 // On ppc64 these are all ds form
8988 maybe_dq_reloc
= true;
8992 case elfcpp::R_POWERPC_ADDR16
:
8993 case elfcpp::R_POWERPC_REL16
:
8994 case elfcpp::R_PPC64_TOC16
:
8995 case elfcpp::R_POWERPC_GOT16
:
8996 case elfcpp::R_POWERPC_SECTOFF
:
8997 case elfcpp::R_POWERPC_TPREL16
:
8998 case elfcpp::R_POWERPC_DTPREL16
:
8999 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9000 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9001 case elfcpp::R_POWERPC_ADDR16_LO
:
9002 case elfcpp::R_POWERPC_REL16_LO
:
9003 case elfcpp::R_PPC64_TOC16_LO
:
9004 case elfcpp::R_POWERPC_GOT16_LO
:
9005 case elfcpp::R_POWERPC_SECTOFF_LO
:
9006 case elfcpp::R_POWERPC_TPREL16_LO
:
9007 case elfcpp::R_POWERPC_DTPREL16_LO
:
9008 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9009 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9011 status
= Reloc::addr16(view
, value
, overflow
);
9013 maybe_dq_reloc
= true;
9016 case elfcpp::R_POWERPC_UADDR16
:
9017 status
= Reloc::addr16_u(view
, value
, overflow
);
9020 case elfcpp::R_PPC64_ADDR16_HIGH
:
9021 case elfcpp::R_PPC64_TPREL16_HIGH
:
9022 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9024 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
9027 case elfcpp::R_POWERPC_ADDR16_HI
:
9028 case elfcpp::R_POWERPC_REL16_HI
:
9029 case elfcpp::R_PPC64_TOC16_HI
:
9030 case elfcpp::R_POWERPC_GOT16_HI
:
9031 case elfcpp::R_POWERPC_SECTOFF_HI
:
9032 case elfcpp::R_POWERPC_TPREL16_HI
:
9033 case elfcpp::R_POWERPC_DTPREL16_HI
:
9034 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9035 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9036 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9037 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9038 Reloc::addr16_hi(view
, value
);
9041 case elfcpp::R_PPC64_ADDR16_HIGHA
:
9042 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9043 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9045 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
9048 case elfcpp::R_POWERPC_ADDR16_HA
:
9049 case elfcpp::R_POWERPC_REL16_HA
:
9050 case elfcpp::R_PPC64_TOC16_HA
:
9051 case elfcpp::R_POWERPC_GOT16_HA
:
9052 case elfcpp::R_POWERPC_SECTOFF_HA
:
9053 case elfcpp::R_POWERPC_TPREL16_HA
:
9054 case elfcpp::R_POWERPC_DTPREL16_HA
:
9055 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9056 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9057 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9058 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9059 Reloc::addr16_ha(view
, value
);
9062 case elfcpp::R_POWERPC_REL16DX_HA
:
9063 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
9066 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9068 // R_PPC_EMB_NADDR16_LO
9071 case elfcpp::R_PPC64_ADDR16_HIGHER
:
9072 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9073 Reloc::addr16_hi2(view
, value
);
9076 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9078 // R_PPC_EMB_NADDR16_HI
9081 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
9082 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9083 Reloc::addr16_ha2(view
, value
);
9086 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9088 // R_PPC_EMB_NADDR16_HA
9091 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
9092 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9093 Reloc::addr16_hi3(view
, value
);
9096 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9101 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
9102 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9103 Reloc::addr16_ha3(view
, value
);
9106 case elfcpp::R_PPC64_DTPREL16_DS
:
9107 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9109 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9112 case elfcpp::R_PPC64_TPREL16_DS
:
9113 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9115 // R_PPC_TLSGD, R_PPC_TLSLD
9118 case elfcpp::R_PPC64_ADDR16_DS
:
9119 case elfcpp::R_PPC64_ADDR16_LO_DS
:
9120 case elfcpp::R_PPC64_TOC16_DS
:
9121 case elfcpp::R_PPC64_TOC16_LO_DS
:
9122 case elfcpp::R_PPC64_GOT16_DS
:
9123 case elfcpp::R_PPC64_GOT16_LO_DS
:
9124 case elfcpp::R_PPC64_SECTOFF_DS
:
9125 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9126 maybe_dq_reloc
= true;
9129 case elfcpp::R_POWERPC_ADDR14
:
9130 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9131 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9132 case elfcpp::R_POWERPC_REL14
:
9133 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9134 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9135 status
= Reloc::addr14(view
, value
, overflow
);
9138 case elfcpp::R_POWERPC_COPY
:
9139 case elfcpp::R_POWERPC_GLOB_DAT
:
9140 case elfcpp::R_POWERPC_JMP_SLOT
:
9141 case elfcpp::R_POWERPC_RELATIVE
:
9142 case elfcpp::R_POWERPC_DTPMOD
:
9143 case elfcpp::R_PPC64_JMP_IREL
:
9144 case elfcpp::R_POWERPC_IRELATIVE
:
9145 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9146 _("unexpected reloc %u in object file"),
9150 case elfcpp::R_PPC64_TOCSAVE
:
9156 Symbol_location loc
;
9157 loc
.object
= relinfo
->object
;
9158 loc
.shndx
= relinfo
->data_shndx
;
9159 loc
.offset
= rela
.get_r_offset();
9160 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
9161 if (p
!= target
->tocsave_loc().end())
9163 // If we've generated plt calls using this tocsave, then
9164 // the nop needs to be changed to save r2.
9165 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9166 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
9167 elfcpp::Swap
<32, big_endian
>::
9168 writeval(iview
, std_2_1
+ target
->stk_toc());
9173 case elfcpp::R_PPC_EMB_SDA2I16
:
9174 case elfcpp::R_PPC_EMB_SDA2REL
:
9177 // R_PPC64_TLSGD, R_PPC64_TLSLD
9180 case elfcpp::R_POWERPC_PLT32
:
9181 case elfcpp::R_POWERPC_PLTREL32
:
9182 case elfcpp::R_POWERPC_PLT16_LO
:
9183 case elfcpp::R_POWERPC_PLT16_HI
:
9184 case elfcpp::R_POWERPC_PLT16_HA
:
9185 case elfcpp::R_PPC_SDAREL16
:
9186 case elfcpp::R_POWERPC_ADDR30
:
9187 case elfcpp::R_PPC64_PLT64
:
9188 case elfcpp::R_PPC64_PLTREL64
:
9189 case elfcpp::R_PPC64_PLTGOT16
:
9190 case elfcpp::R_PPC64_PLTGOT16_LO
:
9191 case elfcpp::R_PPC64_PLTGOT16_HI
:
9192 case elfcpp::R_PPC64_PLTGOT16_HA
:
9193 case elfcpp::R_PPC64_PLT16_LO_DS
:
9194 case elfcpp::R_PPC64_PLTGOT16_DS
:
9195 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
9196 case elfcpp::R_PPC_EMB_RELSDA
:
9197 case elfcpp::R_PPC_TOC16
:
9200 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9201 _("unsupported reloc %u"),
9209 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9211 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
9212 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9213 && (insn
& 3) == 1))
9214 status
= Reloc::addr16_dq(view
, value
, overflow
);
9216 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9217 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9218 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
9219 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
9220 status
= Reloc::addr16_ds(view
, value
, overflow
);
9222 status
= Reloc::addr16(view
, value
, overflow
);
9225 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
9228 && gsym
->is_undefined()
9229 && is_branch_reloc(r_type
))))
9231 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9232 _("relocation overflow"));
9234 gold_info(_("try relinking with a smaller --stub-group-size"));
9240 // Relocate section data.
9242 template<int size
, bool big_endian
>
9244 Target_powerpc
<size
, big_endian
>::relocate_section(
9245 const Relocate_info
<size
, big_endian
>* relinfo
,
9246 unsigned int sh_type
,
9247 const unsigned char* prelocs
,
9249 Output_section
* output_section
,
9250 bool needs_special_offset_handling
,
9251 unsigned char* view
,
9253 section_size_type view_size
,
9254 const Reloc_symbol_changes
* reloc_symbol_changes
)
9256 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
9257 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
9258 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
9259 Powerpc_comdat_behavior
;
9260 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9263 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9265 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
9266 Powerpc_comdat_behavior
, Classify_reloc
>(
9272 needs_special_offset_handling
,
9276 reloc_symbol_changes
);
9279 template<int size
, bool big_endian
>
9280 class Powerpc_scan_relocatable_reloc
9283 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9284 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9285 static const int sh_type
= elfcpp::SHT_RELA
;
9287 // Return the symbol referred to by the relocation.
9288 static inline unsigned int
9289 get_r_sym(const Reltype
* reloc
)
9290 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
9292 // Return the type of the relocation.
9293 static inline unsigned int
9294 get_r_type(const Reltype
* reloc
)
9295 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
9297 // Return the strategy to use for a local symbol which is not a
9298 // section symbol, given the relocation type.
9299 inline Relocatable_relocs::Reloc_strategy
9300 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
9302 if (r_type
== 0 && r_sym
== 0)
9303 return Relocatable_relocs::RELOC_DISCARD
;
9304 return Relocatable_relocs::RELOC_COPY
;
9307 // Return the strategy to use for a local symbol which is a section
9308 // symbol, given the relocation type.
9309 inline Relocatable_relocs::Reloc_strategy
9310 local_section_strategy(unsigned int, Relobj
*)
9312 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
9315 // Return the strategy to use for a global symbol, given the
9316 // relocation type, the object, and the symbol index.
9317 inline Relocatable_relocs::Reloc_strategy
9318 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
9320 if (r_type
== elfcpp::R_PPC_PLTREL24
)
9321 return Relocatable_relocs::RELOC_SPECIAL
;
9322 return Relocatable_relocs::RELOC_COPY
;
9326 // Scan the relocs during a relocatable link.
9328 template<int size
, bool big_endian
>
9330 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
9331 Symbol_table
* symtab
,
9333 Sized_relobj_file
<size
, big_endian
>* object
,
9334 unsigned int data_shndx
,
9335 unsigned int sh_type
,
9336 const unsigned char* prelocs
,
9338 Output_section
* output_section
,
9339 bool needs_special_offset_handling
,
9340 size_t local_symbol_count
,
9341 const unsigned char* plocal_symbols
,
9342 Relocatable_relocs
* rr
)
9344 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
9346 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9348 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
9356 needs_special_offset_handling
,
9362 // Scan the relocs for --emit-relocs.
9364 template<int size
, bool big_endian
>
9366 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
9367 Symbol_table
* symtab
,
9369 Sized_relobj_file
<size
, big_endian
>* object
,
9370 unsigned int data_shndx
,
9371 unsigned int sh_type
,
9372 const unsigned char* prelocs
,
9374 Output_section
* output_section
,
9375 bool needs_special_offset_handling
,
9376 size_t local_symbol_count
,
9377 const unsigned char* plocal_syms
,
9378 Relocatable_relocs
* rr
)
9380 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9382 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
9383 Emit_relocs_strategy
;
9385 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9387 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
9395 needs_special_offset_handling
,
9401 // Emit relocations for a section.
9402 // This is a modified version of the function by the same name in
9403 // target-reloc.h. Using relocate_special_relocatable for
9404 // R_PPC_PLTREL24 would require duplication of the entire body of the
9405 // loop, so we may as well duplicate the whole thing.
9407 template<int size
, bool big_endian
>
9409 Target_powerpc
<size
, big_endian
>::relocate_relocs(
9410 const Relocate_info
<size
, big_endian
>* relinfo
,
9411 unsigned int sh_type
,
9412 const unsigned char* prelocs
,
9414 Output_section
* output_section
,
9415 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
9417 Address view_address
,
9419 unsigned char* reloc_view
,
9420 section_size_type reloc_view_size
)
9422 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9424 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9425 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
9426 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9427 // Offset from start of insn to d-field reloc.
9428 const int d_offset
= big_endian
? 2 : 0;
9430 Powerpc_relobj
<size
, big_endian
>* const object
9431 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
9432 const unsigned int local_count
= object
->local_symbol_count();
9433 unsigned int got2_shndx
= object
->got2_shndx();
9434 Address got2_addend
= 0;
9435 if (got2_shndx
!= 0)
9437 got2_addend
= object
->get_output_section_offset(got2_shndx
);
9438 gold_assert(got2_addend
!= invalid_address
);
9441 unsigned char* pwrite
= reloc_view
;
9442 bool zap_next
= false;
9443 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
9445 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
9446 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
9449 Reltype
reloc(prelocs
);
9450 Reltype_write
reloc_write(pwrite
);
9452 Address offset
= reloc
.get_r_offset();
9453 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
9454 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
9455 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
9456 const unsigned int orig_r_sym
= r_sym
;
9457 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
9458 = reloc
.get_r_addend();
9459 const Symbol
* gsym
= NULL
;
9463 // We could arrange to discard these and other relocs for
9464 // tls optimised sequences in the strategy methods, but for
9465 // now do as BFD ld does.
9466 r_type
= elfcpp::R_POWERPC_NONE
;
9470 // Get the new symbol index.
9471 Output_section
* os
= NULL
;
9472 if (r_sym
< local_count
)
9476 case Relocatable_relocs::RELOC_COPY
:
9477 case Relocatable_relocs::RELOC_SPECIAL
:
9480 r_sym
= object
->symtab_index(r_sym
);
9481 gold_assert(r_sym
!= -1U);
9485 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9487 // We are adjusting a section symbol. We need to find
9488 // the symbol table index of the section symbol for
9489 // the output section corresponding to input section
9490 // in which this symbol is defined.
9491 gold_assert(r_sym
< local_count
);
9493 unsigned int shndx
=
9494 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9495 gold_assert(is_ordinary
);
9496 os
= object
->output_section(shndx
);
9497 gold_assert(os
!= NULL
);
9498 gold_assert(os
->needs_symtab_index());
9499 r_sym
= os
->symtab_index();
9509 gsym
= object
->global_symbol(r_sym
);
9510 gold_assert(gsym
!= NULL
);
9511 if (gsym
->is_forwarder())
9512 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9514 gold_assert(gsym
->has_symtab_index());
9515 r_sym
= gsym
->symtab_index();
9518 // Get the new offset--the location in the output section where
9519 // this relocation should be applied.
9520 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9521 offset
+= offset_in_output_section
;
9524 section_offset_type sot_offset
=
9525 convert_types
<section_offset_type
, Address
>(offset
);
9526 section_offset_type new_sot_offset
=
9527 output_section
->output_offset(object
, relinfo
->data_shndx
,
9529 gold_assert(new_sot_offset
!= -1);
9530 offset
= new_sot_offset
;
9533 // In an object file, r_offset is an offset within the section.
9534 // In an executable or dynamic object, generated by
9535 // --emit-relocs, r_offset is an absolute address.
9536 if (!parameters
->options().relocatable())
9538 offset
+= view_address
;
9539 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9540 offset
-= offset_in_output_section
;
9543 // Handle the reloc addend based on the strategy.
9544 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9546 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9548 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9549 gold_assert(os
!= NULL
);
9550 addend
= psymval
->value(object
, addend
) - os
->address();
9552 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9556 if (addend
>= 32768)
9557 addend
+= got2_addend
;
9559 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9561 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9564 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9566 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9567 addend
-= d_offset
+ 4;
9573 if (!parameters
->options().relocatable())
9575 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9576 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9577 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9578 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9580 // First instruction of a global dynamic sequence,
9582 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9583 switch (this->optimize_tls_gd(final
))
9585 case tls::TLSOPT_TO_IE
:
9586 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9587 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9589 case tls::TLSOPT_TO_LE
:
9590 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9591 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9592 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9595 r_type
= elfcpp::R_POWERPC_NONE
;
9603 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9604 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9605 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9606 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9608 // First instruction of a local dynamic sequence,
9610 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9612 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9613 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9615 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9616 const Output_section
* os
= relinfo
->layout
->tls_segment()
9618 gold_assert(os
!= NULL
);
9619 gold_assert(os
->needs_symtab_index());
9620 r_sym
= os
->symtab_index();
9621 addend
= dtp_offset
;
9625 r_type
= elfcpp::R_POWERPC_NONE
;
9630 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9631 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9632 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9633 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9635 // First instruction of initial exec sequence.
9636 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9637 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9639 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9640 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9641 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9644 r_type
= elfcpp::R_POWERPC_NONE
;
9649 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9650 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9652 // Second instruction of a global dynamic sequence,
9653 // the __tls_get_addr call
9654 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9655 switch (this->optimize_tls_gd(final
))
9657 case tls::TLSOPT_TO_IE
:
9658 r_type
= elfcpp::R_POWERPC_NONE
;
9661 case tls::TLSOPT_TO_LE
:
9662 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9670 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
9671 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
9673 // Second instruction of a local dynamic sequence,
9674 // the __tls_get_addr call
9675 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9677 const Output_section
* os
= relinfo
->layout
->tls_segment()
9679 gold_assert(os
!= NULL
);
9680 gold_assert(os
->needs_symtab_index());
9681 r_sym
= os
->symtab_index();
9682 addend
= dtp_offset
;
9683 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9688 else if (r_type
== elfcpp::R_POWERPC_TLS
)
9690 // Second instruction of an initial exec sequence
9691 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9692 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9694 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9700 reloc_write
.put_r_offset(offset
);
9701 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
9702 reloc_write
.put_r_addend(addend
);
9704 pwrite
+= reloc_size
;
9707 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
9708 == reloc_view_size
);
9711 // Return the value to use for a dynamic symbol which requires special
9712 // treatment. This is how we support equality comparisons of function
9713 // pointers across shared library boundaries, as described in the
9714 // processor specific ABI supplement.
9716 template<int size
, bool big_endian
>
9718 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
9722 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
9723 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9724 p
!= this->stub_tables_
.end();
9727 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
9728 = (*p
)->find_plt_call_entry(gsym
);
9730 return (*p
)->stub_address() + ent
->off_
;
9733 else if (this->abiversion() >= 2)
9735 Address off
= this->glink_section()->find_global_entry(gsym
);
9736 if (off
!= invalid_address
)
9737 return this->glink_section()->global_entry_address() + off
;
9742 // Return the PLT address to use for a local symbol.
9743 template<int size
, bool big_endian
>
9745 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
9746 const Relobj
* object
,
9747 unsigned int symndx
) const
9751 const Sized_relobj
<size
, big_endian
>* relobj
9752 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
9753 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9754 p
!= this->stub_tables_
.end();
9757 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
9758 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
9760 return (*p
)->stub_address() + ent
->off_
;
9766 // Return the PLT address to use for a global symbol.
9767 template<int size
, bool big_endian
>
9769 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
9770 const Symbol
* gsym
) const
9774 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9775 p
!= this->stub_tables_
.end();
9778 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
9779 = (*p
)->find_plt_call_entry(gsym
);
9781 return (*p
)->stub_address() + ent
->off_
;
9784 else if (this->abiversion() >= 2)
9786 Address off
= this->glink_section()->find_global_entry(gsym
);
9787 if (off
!= invalid_address
)
9788 return this->glink_section()->global_entry_address() + off
;
9793 // Return the offset to use for the GOT_INDX'th got entry which is
9794 // for a local tls symbol specified by OBJECT, SYMNDX.
9795 template<int size
, bool big_endian
>
9797 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
9798 const Relobj
* object
,
9799 unsigned int symndx
,
9800 unsigned int got_indx
) const
9802 const Powerpc_relobj
<size
, big_endian
>* ppc_object
9803 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
9804 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
9806 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9807 got_type
<= GOT_TYPE_TPREL
;
9808 got_type
= Got_type(got_type
+ 1))
9809 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
9811 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
9812 if (got_type
== GOT_TYPE_TLSGD
)
9814 if (off
== got_indx
* (size
/ 8))
9816 if (got_type
== GOT_TYPE_TPREL
)
9826 // Return the offset to use for the GOT_INDX'th got entry which is
9827 // for global tls symbol GSYM.
9828 template<int size
, bool big_endian
>
9830 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
9832 unsigned int got_indx
) const
9834 if (gsym
->type() == elfcpp::STT_TLS
)
9836 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9837 got_type
<= GOT_TYPE_TPREL
;
9838 got_type
= Got_type(got_type
+ 1))
9839 if (gsym
->has_got_offset(got_type
))
9841 unsigned int off
= gsym
->got_offset(got_type
);
9842 if (got_type
== GOT_TYPE_TLSGD
)
9844 if (off
== got_indx
* (size
/ 8))
9846 if (got_type
== GOT_TYPE_TPREL
)
9856 // The selector for powerpc object files.
9858 template<int size
, bool big_endian
>
9859 class Target_selector_powerpc
: public Target_selector
9862 Target_selector_powerpc()
9863 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
9866 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
9867 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
9869 ? (big_endian
? "elf64ppc" : "elf64lppc")
9870 : (big_endian
? "elf32ppc" : "elf32lppc")))
9874 do_instantiate_target()
9875 { return new Target_powerpc
<size
, big_endian
>(); }
9878 Target_selector_powerpc
<32, true> target_selector_ppc32
;
9879 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
9880 Target_selector_powerpc
<64, true> target_selector_ppc64
;
9881 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
9883 // Instantiate these constants for -O0
9884 template<int size
, bool big_endian
>
9885 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
9886 template<int size
, bool big_endian
>
9887 const typename Output_data_glink
<size
, big_endian
>::Address
9888 Output_data_glink
<size
, big_endian
>::invalid_address
;
9889 template<int size
, bool big_endian
>
9890 const typename Stub_table
<size
, big_endian
>::Address
9891 Stub_table
<size
, big_endian
>::invalid_address
;
9892 template<int size
, bool big_endian
>
9893 const typename Target_powerpc
<size
, big_endian
>::Address
9894 Target_powerpc
<size
, big_endian
>::invalid_address
;
9896 } // End anonymous namespace.