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 template<int size
, bool big_endian
>
85 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
88 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
89 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
90 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
92 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
93 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
94 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
95 special_(0), relatoc_(0), toc_(0), no_toc_opt_(),
96 has_small_toc_reloc_(false), opd_valid_(false), opd_ent_(),
97 access_from_map_(), has14_(), stub_table_index_(),
98 e_flags_(ehdr
.get_e_flags()), st_other_()
100 this->set_abiversion(0);
106 // Read the symbols then set up st_other vector.
108 do_read_symbols(Read_symbols_data
*);
110 // Arrange to always relocate .toc first.
112 do_relocate_sections(
113 const Symbol_table
* symtab
, const Layout
* layout
,
114 const unsigned char* pshdrs
, Output_file
* of
,
115 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
);
117 // The .toc section index.
124 // Mark .toc entry at OFF as not optimizable.
126 set_no_toc_opt(Address off
)
128 if (this->no_toc_opt_
.empty())
129 this->no_toc_opt_
.resize(this->section_size(this->toc_shndx())
132 if (off
< this->no_toc_opt_
.size())
133 this->no_toc_opt_
[off
] = true;
136 // Mark the entire .toc as not optimizable.
140 this->no_toc_opt_
.resize(1);
141 this->no_toc_opt_
[0] = true;
144 // Return true if code using the .toc entry at OFF should not be edited.
146 no_toc_opt(Address off
) const
148 if (this->no_toc_opt_
.empty())
151 if (off
>= this->no_toc_opt_
.size())
153 return this->no_toc_opt_
[off
];
156 // The .got2 section shndx.
161 return this->special_
;
166 // The .opd section shndx.
173 return this->special_
;
176 // Init OPD entry arrays.
178 init_opd(size_t opd_size
)
180 size_t count
= this->opd_ent_ndx(opd_size
);
181 this->opd_ent_
.resize(count
);
184 // Return section and offset of function entry for .opd + R_OFF.
186 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
188 size_t ndx
= this->opd_ent_ndx(r_off
);
189 gold_assert(ndx
< this->opd_ent_
.size());
190 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
192 *value
= this->opd_ent_
[ndx
].off
;
193 return this->opd_ent_
[ndx
].shndx
;
196 // Set section and offset of function entry for .opd + R_OFF.
198 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
200 size_t ndx
= this->opd_ent_ndx(r_off
);
201 gold_assert(ndx
< this->opd_ent_
.size());
202 this->opd_ent_
[ndx
].shndx
= shndx
;
203 this->opd_ent_
[ndx
].off
= value
;
206 // Return discard flag for .opd + R_OFF.
208 get_opd_discard(Address r_off
) const
210 size_t ndx
= this->opd_ent_ndx(r_off
);
211 gold_assert(ndx
< this->opd_ent_
.size());
212 return this->opd_ent_
[ndx
].discard
;
215 // Set discard flag for .opd + R_OFF.
217 set_opd_discard(Address r_off
)
219 size_t ndx
= this->opd_ent_ndx(r_off
);
220 gold_assert(ndx
< this->opd_ent_
.size());
221 this->opd_ent_
[ndx
].discard
= true;
226 { return this->opd_valid_
; }
230 { this->opd_valid_
= true; }
232 // Examine .rela.opd to build info about function entry points.
234 scan_opd_relocs(size_t reloc_count
,
235 const unsigned char* prelocs
,
236 const unsigned char* plocal_syms
);
238 // Returns true if a code sequence loading a TOC entry can be
239 // converted into code calculating a TOC pointer relative offset.
241 make_toc_relative(Target_powerpc
<size
, big_endian
>* target
,
244 // Perform the Sized_relobj_file method, then set up opd info from
247 do_read_relocs(Read_relocs_data
*);
250 do_find_special_sections(Read_symbols_data
* sd
);
252 // Adjust this local symbol value. Return false if the symbol
253 // should be discarded from the output file.
255 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
257 if (size
== 64 && this->opd_shndx() != 0)
260 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
262 if (this->get_opd_discard(lv
->input_value()))
270 { return &this->access_from_map_
; }
272 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
273 // section at DST_OFF.
275 add_reference(Relobj
* src_obj
,
276 unsigned int src_indx
,
277 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
279 Section_id
src_id(src_obj
, src_indx
);
280 this->access_from_map_
[dst_off
].insert(src_id
);
283 // Add a reference to the code section specified by the .opd entry
286 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
288 size_t ndx
= this->opd_ent_ndx(dst_off
);
289 if (ndx
>= this->opd_ent_
.size())
290 this->opd_ent_
.resize(ndx
+ 1);
291 this->opd_ent_
[ndx
].gc_mark
= true;
295 process_gc_mark(Symbol_table
* symtab
)
297 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
298 if (this->opd_ent_
[i
].gc_mark
)
300 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
301 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
305 // Return offset in output GOT section that this object will use
306 // as a TOC pointer. Won't be just a constant with multi-toc support.
308 toc_base_offset() const
312 set_has_small_toc_reloc()
313 { has_small_toc_reloc_
= true; }
316 has_small_toc_reloc() const
317 { return has_small_toc_reloc_
; }
320 set_has_14bit_branch(unsigned int shndx
)
322 if (shndx
>= this->has14_
.size())
323 this->has14_
.resize(shndx
+ 1);
324 this->has14_
[shndx
] = true;
328 has_14bit_branch(unsigned int shndx
) const
329 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
332 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
334 if (shndx
>= this->stub_table_index_
.size())
335 this->stub_table_index_
.resize(shndx
+ 1, -1);
336 this->stub_table_index_
[shndx
] = stub_index
;
339 Stub_table
<size
, big_endian
>*
340 stub_table(unsigned int shndx
)
342 if (shndx
< this->stub_table_index_
.size())
344 Target_powerpc
<size
, big_endian
>* target
345 = static_cast<Target_powerpc
<size
, big_endian
>*>(
346 parameters
->sized_target
<size
, big_endian
>());
347 unsigned int indx
= this->stub_table_index_
[shndx
];
348 if (indx
< target
->stub_tables().size())
349 return target
->stub_tables()[indx
];
357 this->stub_table_index_
.clear();
362 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
364 // Set ABI version for input and output
366 set_abiversion(int ver
);
369 ppc64_local_entry_offset(const Symbol
* sym
) const
370 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
373 ppc64_local_entry_offset(unsigned int symndx
) const
374 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
385 // Return index into opd_ent_ array for .opd entry at OFF.
386 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
387 // apart when the language doesn't use the last 8-byte word, the
388 // environment pointer. Thus dividing the entry section offset by
389 // 16 will give an index into opd_ent_ that works for either layout
390 // of .opd. (It leaves some elements of the vector unused when .opd
391 // entries are spaced 24 bytes apart, but we don't know the spacing
392 // until relocations are processed, and in any case it is possible
393 // for an object to have some entries spaced 16 bytes apart and
394 // others 24 bytes apart.)
396 opd_ent_ndx(size_t off
) const
399 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
400 unsigned int special_
;
402 // For 64-bit the .rela.toc and .toc section shdnx.
403 unsigned int relatoc_
;
406 // For 64-bit, an array with one entry per 64-bit word in the .toc
407 // section, set if accesses using that word cannot be optimised.
408 std::vector
<bool> no_toc_opt_
;
410 // For 64-bit, whether this object uses small model relocs to access
412 bool has_small_toc_reloc_
;
414 // Set at the start of gc_process_relocs, when we know opd_ent_
415 // vector is valid. The flag could be made atomic and set in
416 // do_read_relocs with memory_order_release and then tested with
417 // memory_order_acquire, potentially resulting in fewer entries in
421 // The first 8-byte word of an OPD entry gives the address of the
422 // entry point of the function. Relocatable object files have a
423 // relocation on this word. The following vector records the
424 // section and offset specified by these relocations.
425 std::vector
<Opd_ent
> opd_ent_
;
427 // References made to this object's .opd section when running
428 // gc_process_relocs for another object, before the opd_ent_ vector
429 // is valid for this object.
430 Access_from access_from_map_
;
432 // Whether input section has a 14-bit branch reloc.
433 std::vector
<bool> has14_
;
435 // The stub table to use for a given input section.
436 std::vector
<unsigned int> stub_table_index_
;
439 elfcpp::Elf_Word e_flags_
;
441 // ELF st_other field for local symbols.
442 std::vector
<unsigned char> st_other_
;
445 template<int size
, bool big_endian
>
446 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
449 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
451 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
452 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
453 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
454 opd_shndx_(0), opd_ent_(), e_flags_(ehdr
.get_e_flags())
456 this->set_abiversion(0);
462 // Call Sized_dynobj::do_read_symbols to read the symbols then
463 // read .opd from a dynamic object, filling in opd_ent_ vector,
465 do_read_symbols(Read_symbols_data
*);
467 // The .opd section shndx.
471 return this->opd_shndx_
;
474 // The .opd section address.
478 return this->opd_address_
;
481 // Init OPD entry arrays.
483 init_opd(size_t opd_size
)
485 size_t count
= this->opd_ent_ndx(opd_size
);
486 this->opd_ent_
.resize(count
);
489 // Return section and offset of function entry for .opd + R_OFF.
491 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
493 size_t ndx
= this->opd_ent_ndx(r_off
);
494 gold_assert(ndx
< this->opd_ent_
.size());
495 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
497 *value
= this->opd_ent_
[ndx
].off
;
498 return this->opd_ent_
[ndx
].shndx
;
501 // Set section and offset of function entry for .opd + R_OFF.
503 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
505 size_t ndx
= this->opd_ent_ndx(r_off
);
506 gold_assert(ndx
< this->opd_ent_
.size());
507 this->opd_ent_
[ndx
].shndx
= shndx
;
508 this->opd_ent_
[ndx
].off
= value
;
513 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
515 // Set ABI version for input and output.
517 set_abiversion(int ver
);
520 // Used to specify extent of executable sections.
523 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
524 : start(start_
), len(len_
), shndx(shndx_
)
528 operator<(const Sec_info
& that
) const
529 { return this->start
< that
.start
; }
542 // Return index into opd_ent_ array for .opd entry at OFF.
544 opd_ent_ndx(size_t off
) const
547 // For 64-bit the .opd section shndx and address.
548 unsigned int opd_shndx_
;
549 Address opd_address_
;
551 // The first 8-byte word of an OPD entry gives the address of the
552 // entry point of the function. Records the section and offset
553 // corresponding to the address. Note that in dynamic objects,
554 // offset is *not* relative to the section.
555 std::vector
<Opd_ent
> opd_ent_
;
558 elfcpp::Elf_Word e_flags_
;
561 // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
562 // base class will emit.
564 template<int sh_type
, int size
, bool big_endian
>
565 class Powerpc_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
568 Powerpc_copy_relocs()
569 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_POWERPC_COPY
)
572 // Emit any saved relocations which turn out to be needed. This is
573 // called after all the relocs have been scanned.
575 emit(Output_data_reloc
<sh_type
, true, size
, big_endian
>*);
578 template<int size
, bool big_endian
>
579 class Target_powerpc
: public Sized_target
<size
, big_endian
>
583 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
584 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
585 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
586 static const Address invalid_address
= static_cast<Address
>(0) - 1;
587 // Offset of tp and dtp pointers from start of TLS block.
588 static const Address tp_offset
= 0x7000;
589 static const Address dtp_offset
= 0x8000;
592 : Sized_target
<size
, big_endian
>(&powerpc_info
),
593 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
594 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(),
595 tlsld_got_offset_(-1U),
596 stub_tables_(), branch_lookup_table_(), branch_info_(),
597 plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0),
598 stub_group_size_(0), savres_section_(0)
602 // Process the relocations to determine unreferenced sections for
603 // garbage collection.
605 gc_process_relocs(Symbol_table
* symtab
,
607 Sized_relobj_file
<size
, big_endian
>* object
,
608 unsigned int data_shndx
,
609 unsigned int sh_type
,
610 const unsigned char* prelocs
,
612 Output_section
* output_section
,
613 bool needs_special_offset_handling
,
614 size_t local_symbol_count
,
615 const unsigned char* plocal_symbols
);
617 // Scan the relocations to look for symbol adjustments.
619 scan_relocs(Symbol_table
* symtab
,
621 Sized_relobj_file
<size
, big_endian
>* object
,
622 unsigned int data_shndx
,
623 unsigned int sh_type
,
624 const unsigned char* prelocs
,
626 Output_section
* output_section
,
627 bool needs_special_offset_handling
,
628 size_t local_symbol_count
,
629 const unsigned char* plocal_symbols
);
631 // Map input .toc section to output .got section.
633 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
635 if (size
== 64 && strcmp(name
, ".toc") == 0)
643 // Provide linker defined save/restore functions.
645 define_save_restore_funcs(Layout
*, Symbol_table
*);
647 // No stubs unless a final link.
650 { return !parameters
->options().relocatable(); }
653 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
656 do_plt_fde_location(const Output_data
*, unsigned char*,
657 uint64_t*, off_t
*) const;
659 // Stash info about branches, for stub generation.
661 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
662 unsigned int data_shndx
, Address r_offset
,
663 unsigned int r_type
, unsigned int r_sym
, Address addend
)
665 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
666 this->branch_info_
.push_back(info
);
667 if (r_type
== elfcpp::R_POWERPC_REL14
668 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
669 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
670 ppc_object
->set_has_14bit_branch(data_shndx
);
674 do_define_standard_symbols(Symbol_table
*, Layout
*);
676 // Finalize the sections.
678 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
680 // Return the value to use for a dynamic which requires special
683 do_dynsym_value(const Symbol
*) const;
685 // Return the PLT address to use for a local symbol.
687 do_plt_address_for_local(const Relobj
*, unsigned int) const;
689 // Return the PLT address to use for a global symbol.
691 do_plt_address_for_global(const Symbol
*) const;
693 // Return the offset to use for the GOT_INDX'th got entry which is
694 // for a local tls symbol specified by OBJECT, SYMNDX.
696 do_tls_offset_for_local(const Relobj
* object
,
698 unsigned int got_indx
) const;
700 // Return the offset to use for the GOT_INDX'th got entry which is
701 // for global tls symbol GSYM.
703 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
706 do_function_location(Symbol_location
*) const;
709 do_can_check_for_function_pointers() const
712 // Adjust -fsplit-stack code which calls non-split-stack code.
714 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
715 section_offset_type fnoffset
, section_size_type fnsize
,
716 const unsigned char* prelocs
, size_t reloc_count
,
717 unsigned char* view
, section_size_type view_size
,
718 std::string
* from
, std::string
* to
) const;
720 // Relocate a section.
722 relocate_section(const Relocate_info
<size
, big_endian
>*,
723 unsigned int sh_type
,
724 const unsigned char* prelocs
,
726 Output_section
* output_section
,
727 bool needs_special_offset_handling
,
729 Address view_address
,
730 section_size_type view_size
,
731 const Reloc_symbol_changes
*);
733 // Scan the relocs during a relocatable link.
735 scan_relocatable_relocs(Symbol_table
* symtab
,
737 Sized_relobj_file
<size
, big_endian
>* object
,
738 unsigned int data_shndx
,
739 unsigned int sh_type
,
740 const unsigned char* prelocs
,
742 Output_section
* output_section
,
743 bool needs_special_offset_handling
,
744 size_t local_symbol_count
,
745 const unsigned char* plocal_symbols
,
746 Relocatable_relocs
*);
748 // Scan the relocs for --emit-relocs.
750 emit_relocs_scan(Symbol_table
* symtab
,
752 Sized_relobj_file
<size
, big_endian
>* object
,
753 unsigned int data_shndx
,
754 unsigned int sh_type
,
755 const unsigned char* prelocs
,
757 Output_section
* output_section
,
758 bool needs_special_offset_handling
,
759 size_t local_symbol_count
,
760 const unsigned char* plocal_syms
,
761 Relocatable_relocs
* rr
);
763 // Emit relocations for a section.
765 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
766 unsigned int sh_type
,
767 const unsigned char* prelocs
,
769 Output_section
* output_section
,
770 typename
elfcpp::Elf_types
<size
>::Elf_Off
771 offset_in_output_section
,
773 Address view_address
,
775 unsigned char* reloc_view
,
776 section_size_type reloc_view_size
);
778 // Return whether SYM is defined by the ABI.
780 do_is_defined_by_abi(const Symbol
* sym
) const
782 return strcmp(sym
->name(), "__tls_get_addr") == 0;
785 // Return the size of the GOT section.
789 gold_assert(this->got_
!= NULL
);
790 return this->got_
->data_size();
793 // Get the PLT section.
794 const Output_data_plt_powerpc
<size
, big_endian
>*
797 gold_assert(this->plt_
!= NULL
);
801 // Get the IPLT section.
802 const Output_data_plt_powerpc
<size
, big_endian
>*
805 gold_assert(this->iplt_
!= NULL
);
809 // Get the .glink section.
810 const Output_data_glink
<size
, big_endian
>*
811 glink_section() const
813 gold_assert(this->glink_
!= NULL
);
817 Output_data_glink
<size
, big_endian
>*
820 gold_assert(this->glink_
!= NULL
);
824 bool has_glink() const
825 { return this->glink_
!= NULL
; }
827 // Get the GOT section.
828 const Output_data_got_powerpc
<size
, big_endian
>*
831 gold_assert(this->got_
!= NULL
);
835 // Get the GOT section, creating it if necessary.
836 Output_data_got_powerpc
<size
, big_endian
>*
837 got_section(Symbol_table
*, Layout
*);
840 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
841 const elfcpp::Ehdr
<size
, big_endian
>&);
843 // Return the number of entries in the GOT.
845 got_entry_count() const
847 if (this->got_
== NULL
)
849 return this->got_size() / (size
/ 8);
852 // Return the number of entries in the PLT.
854 plt_entry_count() const;
856 // Return the offset of the first non-reserved PLT entry.
858 first_plt_entry_offset() const
862 if (this->abiversion() >= 2)
867 // Return the size of each PLT entry.
869 plt_entry_size() const
873 if (this->abiversion() >= 2)
878 Output_data_save_res
<size
, big_endian
>*
879 savres_section() const
881 return this->savres_section_
;
884 // Add any special sections for this symbol to the gc work list.
885 // For powerpc64, this adds the code section of a function
888 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
890 // Handle target specific gc actions when adding a gc reference from
891 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
892 // and DST_OFF. For powerpc64, this adds a referenc to the code
893 // section of a function descriptor.
895 do_gc_add_reference(Symbol_table
* symtab
,
897 unsigned int src_shndx
,
899 unsigned int dst_shndx
,
900 Address dst_off
) const;
902 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
905 { return this->stub_tables_
; }
907 const Output_data_brlt_powerpc
<size
, big_endian
>*
909 { return this->brlt_section_
; }
912 add_branch_lookup_table(Address to
)
914 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
915 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
919 find_branch_lookup_table(Address to
)
921 typename
Branch_lookup_table::const_iterator p
922 = this->branch_lookup_table_
.find(to
);
923 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
927 write_branch_lookup_table(unsigned char *oview
)
929 for (typename
Branch_lookup_table::const_iterator p
930 = this->branch_lookup_table_
.begin();
931 p
!= this->branch_lookup_table_
.end();
934 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
939 plt_thread_safe() const
940 { return this->plt_thread_safe_
; }
944 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
947 set_abiversion (int ver
)
949 elfcpp::Elf_Word flags
= this->processor_specific_flags();
950 flags
&= ~elfcpp::EF_PPC64_ABI
;
951 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
952 this->set_processor_specific_flags(flags
);
955 // Offset to to save stack slot
958 { return this->abiversion() < 2 ? 40 : 24; }
974 : tls_get_addr_(NOT_EXPECTED
),
975 relinfo_(NULL
), relnum_(0), r_offset_(0)
980 if (this->tls_get_addr_
!= NOT_EXPECTED
)
987 if (this->relinfo_
!= NULL
)
988 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
989 _("missing expected __tls_get_addr call"));
993 expect_tls_get_addr_call(
994 const Relocate_info
<size
, big_endian
>* relinfo
,
998 this->tls_get_addr_
= EXPECTED
;
999 this->relinfo_
= relinfo
;
1000 this->relnum_
= relnum
;
1001 this->r_offset_
= r_offset
;
1005 expect_tls_get_addr_call()
1006 { this->tls_get_addr_
= EXPECTED
; }
1009 skip_next_tls_get_addr_call()
1010 {this->tls_get_addr_
= SKIP
; }
1013 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
1015 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
1016 || r_type
== elfcpp::R_PPC_PLTREL24
)
1018 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
1019 Tls_get_addr last_tls
= this->tls_get_addr_
;
1020 this->tls_get_addr_
= NOT_EXPECTED
;
1021 if (is_tls_call
&& last_tls
!= EXPECTED
)
1023 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
1032 // What we're up to regarding calls to __tls_get_addr.
1033 // On powerpc, the branch and link insn making a call to
1034 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1035 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1036 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1037 // The marker relocation always comes first, and has the same
1038 // symbol as the reloc on the insn setting up the __tls_get_addr
1039 // argument. This ties the arg setup insn with the call insn,
1040 // allowing ld to safely optimize away the call. We check that
1041 // every call to __tls_get_addr has a marker relocation, and that
1042 // every marker relocation is on a call to __tls_get_addr.
1043 Tls_get_addr tls_get_addr_
;
1044 // Info about the last reloc for error message.
1045 const Relocate_info
<size
, big_endian
>* relinfo_
;
1050 // The class which scans relocations.
1051 class Scan
: protected Track_tls
1054 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1057 : Track_tls(), issued_non_pic_error_(false)
1061 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
1064 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1065 Sized_relobj_file
<size
, big_endian
>* object
,
1066 unsigned int data_shndx
,
1067 Output_section
* output_section
,
1068 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1069 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1073 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1074 Sized_relobj_file
<size
, big_endian
>* object
,
1075 unsigned int data_shndx
,
1076 Output_section
* output_section
,
1077 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1081 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1083 Sized_relobj_file
<size
, big_endian
>* relobj
,
1086 const elfcpp::Rela
<size
, big_endian
>& ,
1087 unsigned int r_type
,
1088 const elfcpp::Sym
<size
, big_endian
>&)
1090 // PowerPC64 .opd is not folded, so any identical function text
1091 // may be folded and we'll still keep function addresses distinct.
1092 // That means no reloc is of concern here.
1095 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1096 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1097 if (ppcobj
->abiversion() == 1)
1100 // For 32-bit and ELFv2, conservatively assume anything but calls to
1101 // function code might be taking the address of the function.
1102 return !is_branch_reloc(r_type
);
1106 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1108 Sized_relobj_file
<size
, big_endian
>* relobj
,
1111 const elfcpp::Rela
<size
, big_endian
>& ,
1112 unsigned int r_type
,
1118 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1119 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1120 if (ppcobj
->abiversion() == 1)
1123 return !is_branch_reloc(r_type
);
1127 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1128 Sized_relobj_file
<size
, big_endian
>* object
,
1129 unsigned int r_type
, bool report_err
);
1133 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1134 unsigned int r_type
);
1137 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1138 unsigned int r_type
, Symbol
*);
1141 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1142 Target_powerpc
* target
);
1145 check_non_pic(Relobj
*, unsigned int r_type
);
1147 // Whether we have issued an error about a non-PIC compilation.
1148 bool issued_non_pic_error_
;
1152 symval_for_branch(const Symbol_table
* symtab
,
1153 const Sized_symbol
<size
>* gsym
,
1154 Powerpc_relobj
<size
, big_endian
>* object
,
1155 Address
*value
, unsigned int *dest_shndx
);
1157 // The class which implements relocation.
1158 class Relocate
: protected Track_tls
1161 // Use 'at' branch hints when true, 'y' when false.
1162 // FIXME maybe: set this with an option.
1163 static const bool is_isa_v2
= true;
1169 // Do a relocation. Return false if the caller should not issue
1170 // any warnings about this relocation.
1172 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1173 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1174 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1175 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1179 class Relocate_comdat_behavior
1182 // Decide what the linker should do for relocations that refer to
1183 // discarded comdat sections.
1184 inline Comdat_behavior
1185 get(const char* name
)
1187 gold::Default_comdat_behavior default_behavior
;
1188 Comdat_behavior ret
= default_behavior
.get(name
);
1189 if (ret
== CB_WARNING
)
1192 && (strcmp(name
, ".fixup") == 0
1193 || strcmp(name
, ".got2") == 0))
1196 && (strcmp(name
, ".opd") == 0
1197 || strcmp(name
, ".toc") == 0
1198 || strcmp(name
, ".toc1") == 0))
1205 // Optimize the TLS relocation type based on what we know about the
1206 // symbol. IS_FINAL is true if the final address of this symbol is
1207 // known at link time.
1209 tls::Tls_optimization
1210 optimize_tls_gd(bool is_final
)
1212 // If we are generating a shared library, then we can't do anything
1214 if (parameters
->options().shared())
1215 return tls::TLSOPT_NONE
;
1218 return tls::TLSOPT_TO_IE
;
1219 return tls::TLSOPT_TO_LE
;
1222 tls::Tls_optimization
1225 if (parameters
->options().shared())
1226 return tls::TLSOPT_NONE
;
1228 return tls::TLSOPT_TO_LE
;
1231 tls::Tls_optimization
1232 optimize_tls_ie(bool is_final
)
1234 if (!is_final
|| parameters
->options().shared())
1235 return tls::TLSOPT_NONE
;
1237 return tls::TLSOPT_TO_LE
;
1242 make_glink_section(Layout
*);
1244 // Create the PLT section.
1246 make_plt_section(Symbol_table
*, Layout
*);
1249 make_iplt_section(Symbol_table
*, Layout
*);
1252 make_brlt_section(Layout
*);
1254 // Create a PLT entry for a global symbol.
1256 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1258 // Create a PLT entry for a local IFUNC symbol.
1260 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1261 Sized_relobj_file
<size
, big_endian
>*,
1265 // Create a GOT entry for local dynamic __tls_get_addr.
1267 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1268 Sized_relobj_file
<size
, big_endian
>* object
);
1271 tlsld_got_offset() const
1273 return this->tlsld_got_offset_
;
1276 // Get the dynamic reloc section, creating it if necessary.
1278 rela_dyn_section(Layout
*);
1280 // Similarly, but for ifunc symbols get the one for ifunc.
1282 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1284 // Copy a relocation against a global symbol.
1286 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1287 Sized_relobj_file
<size
, big_endian
>* object
,
1288 unsigned int shndx
, Output_section
* output_section
,
1289 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1291 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1292 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1293 symtab
->get_sized_symbol
<size
>(sym
),
1294 object
, shndx
, output_section
,
1295 r_type
, reloc
.get_r_offset(),
1296 reloc
.get_r_addend(),
1297 this->rela_dyn_section(layout
));
1300 // Look over all the input sections, deciding where to place stubs.
1302 group_sections(Layout
*, const Task
*, bool);
1304 // Sort output sections by address.
1305 struct Sort_sections
1308 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1309 { return sec1
->address() < sec2
->address(); }
1315 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1316 unsigned int data_shndx
,
1318 unsigned int r_type
,
1321 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1322 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1328 // If this branch needs a plt call stub, or a long branch stub, make one.
1330 make_stub(Stub_table
<size
, big_endian
>*,
1331 Stub_table
<size
, big_endian
>*,
1332 Symbol_table
*) const;
1335 // The branch location..
1336 Powerpc_relobj
<size
, big_endian
>* object_
;
1337 unsigned int shndx_
;
1339 // ..and the branch type and destination.
1340 unsigned int r_type_
;
1341 unsigned int r_sym_
;
1345 // Information about this specific target which we pass to the
1346 // general Target structure.
1347 static Target::Target_info powerpc_info
;
1349 // The types of GOT entries needed for this platform.
1350 // These values are exposed to the ABI in an incremental link.
1351 // Do not renumber existing values without changing the version
1352 // number of the .gnu_incremental_inputs section.
1356 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1357 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1358 GOT_TYPE_TPREL
// entry for @got@tprel
1362 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1363 // The PLT section. This is a container for a table of addresses,
1364 // and their relocations. Each address in the PLT has a dynamic
1365 // relocation (R_*_JMP_SLOT) and each address will have a
1366 // corresponding entry in .glink for lazy resolution of the PLT.
1367 // ppc32 initialises the PLT to point at the .glink entry, while
1368 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1369 // linker adds a stub that loads the PLT entry into ctr then
1370 // branches to ctr. There may be more than one stub for each PLT
1371 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1372 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1373 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1374 // The IPLT section. Like plt_, this is a container for a table of
1375 // addresses and their relocations, specifically for STT_GNU_IFUNC
1376 // functions that resolve locally (STT_GNU_IFUNC functions that
1377 // don't resolve locally go in PLT). Unlike plt_, these have no
1378 // entry in .glink for lazy resolution, and the relocation section
1379 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1380 // the relocation section may contain relocations against
1381 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1382 // relocation section will appear at the end of other dynamic
1383 // relocations, so that ld.so applies these relocations after other
1384 // dynamic relocations. In a static executable, the relocation
1385 // section is emitted and marked with __rela_iplt_start and
1386 // __rela_iplt_end symbols.
1387 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1388 // Section holding long branch destinations.
1389 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1390 // The .glink section.
1391 Output_data_glink
<size
, big_endian
>* glink_
;
1392 // The dynamic reloc section.
1393 Reloc_section
* rela_dyn_
;
1394 // Relocs saved to avoid a COPY reloc.
1395 Powerpc_copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1396 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1397 unsigned int tlsld_got_offset_
;
1399 Stub_tables stub_tables_
;
1400 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1401 Branch_lookup_table branch_lookup_table_
;
1403 typedef std::vector
<Branch_info
> Branches
;
1404 Branches branch_info_
;
1406 bool plt_thread_safe_
;
1409 int relax_fail_count_
;
1410 int32_t stub_group_size_
;
1412 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1416 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1419 true, // is_big_endian
1420 elfcpp::EM_PPC
, // machine_code
1421 false, // has_make_symbol
1422 false, // has_resolve
1423 false, // has_code_fill
1424 true, // is_default_stack_executable
1425 false, // can_icf_inline_merge_sections
1427 "/usr/lib/ld.so.1", // dynamic_linker
1428 0x10000000, // default_text_segment_address
1429 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1430 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1431 false, // isolate_execinstr
1433 elfcpp::SHN_UNDEF
, // small_common_shndx
1434 elfcpp::SHN_UNDEF
, // large_common_shndx
1435 0, // small_common_section_flags
1436 0, // large_common_section_flags
1437 NULL
, // attributes_section
1438 NULL
, // attributes_vendor
1439 "_start", // entry_symbol_name
1440 32, // hash_entry_size
1444 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1447 false, // is_big_endian
1448 elfcpp::EM_PPC
, // machine_code
1449 false, // has_make_symbol
1450 false, // has_resolve
1451 false, // has_code_fill
1452 true, // is_default_stack_executable
1453 false, // can_icf_inline_merge_sections
1455 "/usr/lib/ld.so.1", // dynamic_linker
1456 0x10000000, // default_text_segment_address
1457 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1458 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1459 false, // isolate_execinstr
1461 elfcpp::SHN_UNDEF
, // small_common_shndx
1462 elfcpp::SHN_UNDEF
, // large_common_shndx
1463 0, // small_common_section_flags
1464 0, // large_common_section_flags
1465 NULL
, // attributes_section
1466 NULL
, // attributes_vendor
1467 "_start", // entry_symbol_name
1468 32, // hash_entry_size
1472 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1475 true, // is_big_endian
1476 elfcpp::EM_PPC64
, // machine_code
1477 false, // has_make_symbol
1478 false, // has_resolve
1479 false, // has_code_fill
1480 true, // is_default_stack_executable
1481 false, // can_icf_inline_merge_sections
1483 "/usr/lib/ld.so.1", // dynamic_linker
1484 0x10000000, // default_text_segment_address
1485 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1486 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1487 false, // isolate_execinstr
1489 elfcpp::SHN_UNDEF
, // small_common_shndx
1490 elfcpp::SHN_UNDEF
, // large_common_shndx
1491 0, // small_common_section_flags
1492 0, // large_common_section_flags
1493 NULL
, // attributes_section
1494 NULL
, // attributes_vendor
1495 "_start", // entry_symbol_name
1496 32, // hash_entry_size
1500 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1503 false, // is_big_endian
1504 elfcpp::EM_PPC64
, // machine_code
1505 false, // has_make_symbol
1506 false, // has_resolve
1507 false, // has_code_fill
1508 true, // is_default_stack_executable
1509 false, // can_icf_inline_merge_sections
1511 "/usr/lib/ld.so.1", // dynamic_linker
1512 0x10000000, // default_text_segment_address
1513 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1514 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1515 false, // isolate_execinstr
1517 elfcpp::SHN_UNDEF
, // small_common_shndx
1518 elfcpp::SHN_UNDEF
, // large_common_shndx
1519 0, // small_common_section_flags
1520 0, // large_common_section_flags
1521 NULL
, // attributes_section
1522 NULL
, // attributes_vendor
1523 "_start", // entry_symbol_name
1524 32, // hash_entry_size
1528 is_branch_reloc(unsigned int r_type
)
1530 return (r_type
== elfcpp::R_POWERPC_REL24
1531 || r_type
== elfcpp::R_PPC_PLTREL24
1532 || r_type
== elfcpp::R_PPC_LOCAL24PC
1533 || r_type
== elfcpp::R_POWERPC_REL14
1534 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1535 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1536 || r_type
== elfcpp::R_POWERPC_ADDR24
1537 || r_type
== elfcpp::R_POWERPC_ADDR14
1538 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1539 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1542 // If INSN is an opcode that may be used with an @tls operand, return
1543 // the transformed insn for TLS optimisation, otherwise return 0. If
1544 // REG is non-zero only match an insn with RB or RA equal to REG.
1546 at_tls_transform(uint32_t insn
, unsigned int reg
)
1548 if ((insn
& (0x3f << 26)) != 31 << 26)
1552 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1553 rtra
= insn
& ((1 << 26) - (1 << 16));
1554 else if (((insn
>> 16) & 0x1f) == reg
)
1555 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1559 if ((insn
& (0x3ff << 1)) == 266 << 1)
1562 else if ((insn
& (0x1f << 1)) == 23 << 1
1563 && ((insn
& (0x1f << 6)) < 14 << 6
1564 || ((insn
& (0x1f << 6)) >= 16 << 6
1565 && (insn
& (0x1f << 6)) < 24 << 6)))
1566 // load and store indexed -> dform
1567 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1568 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1569 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1570 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1571 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1573 insn
= (58 << 26) | 2;
1581 template<int size
, bool big_endian
>
1582 class Powerpc_relocate_functions
1602 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1603 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1604 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1606 template<int valsize
>
1608 has_overflow_signed(Address value
)
1610 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1611 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1612 limit
<<= ((valsize
- 1) >> 1);
1613 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1614 return value
+ limit
> (limit
<< 1) - 1;
1617 template<int valsize
>
1619 has_overflow_unsigned(Address value
)
1621 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1622 limit
<<= ((valsize
- 1) >> 1);
1623 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1624 return value
> (limit
<< 1) - 1;
1627 template<int valsize
>
1629 has_overflow_bitfield(Address value
)
1631 return (has_overflow_unsigned
<valsize
>(value
)
1632 && has_overflow_signed
<valsize
>(value
));
1635 template<int valsize
>
1636 static inline Status
1637 overflowed(Address value
, Overflow_check overflow
)
1639 if (overflow
== CHECK_SIGNED
)
1641 if (has_overflow_signed
<valsize
>(value
))
1642 return STATUS_OVERFLOW
;
1644 else if (overflow
== CHECK_UNSIGNED
)
1646 if (has_overflow_unsigned
<valsize
>(value
))
1647 return STATUS_OVERFLOW
;
1649 else if (overflow
== CHECK_BITFIELD
)
1651 if (has_overflow_bitfield
<valsize
>(value
))
1652 return STATUS_OVERFLOW
;
1657 // Do a simple RELA relocation
1658 template<int fieldsize
, int valsize
>
1659 static inline Status
1660 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1662 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1663 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1664 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1665 return overflowed
<valsize
>(value
, overflow
);
1668 template<int fieldsize
, int valsize
>
1669 static inline Status
1670 rela(unsigned char* view
,
1671 unsigned int right_shift
,
1672 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1674 Overflow_check overflow
)
1676 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1677 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1678 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1679 Valtype reloc
= value
>> right_shift
;
1682 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1683 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1686 // Do a simple RELA relocation, unaligned.
1687 template<int fieldsize
, int valsize
>
1688 static inline Status
1689 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1691 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1692 return overflowed
<valsize
>(value
, overflow
);
1695 template<int fieldsize
, int valsize
>
1696 static inline Status
1697 rela_ua(unsigned char* view
,
1698 unsigned int right_shift
,
1699 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1701 Overflow_check overflow
)
1703 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1705 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1706 Valtype reloc
= value
>> right_shift
;
1709 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1710 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1714 // R_PPC64_ADDR64: (Symbol + Addend)
1716 addr64(unsigned char* view
, Address value
)
1717 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1719 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1721 addr64_u(unsigned char* view
, Address value
)
1722 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1724 // R_POWERPC_ADDR32: (Symbol + Addend)
1725 static inline Status
1726 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1727 { return This::template rela
<32,32>(view
, value
, overflow
); }
1729 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1730 static inline Status
1731 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1732 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1734 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1735 static inline Status
1736 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1738 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1740 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1741 stat
= STATUS_OVERFLOW
;
1745 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1746 static inline Status
1747 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1748 { return This::template rela
<16,16>(view
, value
, overflow
); }
1750 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1751 static inline Status
1752 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1753 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1755 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1756 static inline Status
1757 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1759 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1760 if ((value
& 3) != 0)
1761 stat
= STATUS_OVERFLOW
;
1765 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1766 static inline Status
1767 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1769 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1770 if ((value
& 15) != 0)
1771 stat
= STATUS_OVERFLOW
;
1775 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1777 addr16_hi(unsigned char* view
, Address value
)
1778 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1780 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1782 addr16_ha(unsigned char* view
, Address value
)
1783 { This::addr16_hi(view
, value
+ 0x8000); }
1785 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1787 addr16_hi2(unsigned char* view
, Address value
)
1788 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1790 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1792 addr16_ha2(unsigned char* view
, Address value
)
1793 { This::addr16_hi2(view
, value
+ 0x8000); }
1795 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1797 addr16_hi3(unsigned char* view
, Address value
)
1798 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1800 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1802 addr16_ha3(unsigned char* view
, Address value
)
1803 { This::addr16_hi3(view
, value
+ 0x8000); }
1805 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1806 static inline Status
1807 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1809 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1810 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1811 stat
= STATUS_OVERFLOW
;
1815 // R_POWERPC_REL16DX_HA
1816 static inline Status
1817 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
1819 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
1820 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1821 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
1823 value
= static_cast<SignedAddress
>(value
) >> 16;
1824 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
1825 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
1826 return overflowed
<16>(value
, overflow
);
1830 // Set ABI version for input and output.
1832 template<int size
, bool big_endian
>
1834 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1836 this->e_flags_
|= ver
;
1837 if (this->abiversion() != 0)
1839 Target_powerpc
<size
, big_endian
>* target
=
1840 static_cast<Target_powerpc
<size
, big_endian
>*>(
1841 parameters
->sized_target
<size
, big_endian
>());
1842 if (target
->abiversion() == 0)
1843 target
->set_abiversion(this->abiversion());
1844 else if (target
->abiversion() != this->abiversion())
1845 gold_error(_("%s: ABI version %d is not compatible "
1846 "with ABI version %d output"),
1847 this->name().c_str(),
1848 this->abiversion(), target
->abiversion());
1853 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
1854 // relocatable object, if such sections exists.
1856 template<int size
, bool big_endian
>
1858 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1859 Read_symbols_data
* sd
)
1861 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1862 const unsigned char* namesu
= sd
->section_names
->data();
1863 const char* names
= reinterpret_cast<const char*>(namesu
);
1864 section_size_type names_size
= sd
->section_names_size
;
1865 const unsigned char* s
;
1867 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1868 size
== 32 ? ".got2" : ".opd",
1869 names
, names_size
, NULL
);
1872 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1873 this->special_
= ndx
;
1876 if (this->abiversion() == 0)
1877 this->set_abiversion(1);
1878 else if (this->abiversion() > 1)
1879 gold_error(_("%s: .opd invalid in abiv%d"),
1880 this->name().c_str(), this->abiversion());
1885 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
1886 names
, names_size
, NULL
);
1889 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1890 this->relatoc_
= ndx
;
1891 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1892 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
1895 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1898 // Examine .rela.opd to build info about function entry points.
1900 template<int size
, bool big_endian
>
1902 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1904 const unsigned char* prelocs
,
1905 const unsigned char* plocal_syms
)
1909 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
1910 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
1911 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1912 Address expected_off
= 0;
1913 bool regular
= true;
1914 unsigned int opd_ent_size
= 0;
1916 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1918 Reltype
reloc(prelocs
);
1919 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1920 = reloc
.get_r_info();
1921 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1922 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1924 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1925 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1928 if (r_sym
< this->local_symbol_count())
1930 typename
elfcpp::Sym
<size
, big_endian
>
1931 lsym(plocal_syms
+ r_sym
* sym_size
);
1932 shndx
= lsym
.get_st_shndx();
1933 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1934 value
= lsym
.get_st_value();
1937 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1939 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1940 value
+ reloc
.get_r_addend());
1943 expected_off
= reloc
.get_r_offset();
1944 opd_ent_size
= expected_off
;
1946 else if (expected_off
!= reloc
.get_r_offset())
1948 expected_off
+= opd_ent_size
;
1950 else if (r_type
== elfcpp::R_PPC64_TOC
)
1952 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1957 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1958 this->name().c_str(), r_type
);
1962 if (reloc_count
<= 2)
1963 opd_ent_size
= this->section_size(this->opd_shndx());
1964 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1968 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1969 this->name().c_str());
1975 // Returns true if a code sequence loading the TOC entry at VALUE
1976 // relative to the TOC pointer can be converted into code calculating
1977 // a TOC pointer relative offset.
1978 // If so, the TOC pointer relative offset is stored to VALUE.
1980 template<int size
, bool big_endian
>
1982 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
1983 Target_powerpc
<size
, big_endian
>* target
,
1989 // With -mcmodel=medium code it is quite possible to have
1990 // toc-relative relocs referring to objects outside the TOC.
1991 // Don't try to look at a non-existent TOC.
1992 if (this->toc_shndx() == 0)
1995 // Convert VALUE back to an address by adding got_base (see below),
1996 // then to an offset in the TOC by subtracting the TOC output
1997 // section address and the TOC output offset. Since this TOC output
1998 // section and the got output section are one and the same, we can
1999 // omit adding and subtracting the output section address.
2000 Address off
= (*value
+ this->toc_base_offset()
2001 - this->output_section_offset(this->toc_shndx()));
2002 // Is this offset in the TOC? -mcmodel=medium code may be using
2003 // TOC relative access to variables outside the TOC. Those of
2004 // course can't be optimized. We also don't try to optimize code
2005 // that is using a different object's TOC.
2006 if (off
>= this->section_size(this->toc_shndx()))
2009 if (this->no_toc_opt(off
))
2012 section_size_type vlen
;
2013 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2014 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2016 Address got_base
= (target
->got_section()->output_section()->address()
2017 + this->toc_base_offset());
2019 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2026 // Perform the Sized_relobj_file method, then set up opd info from
2029 template<int size
, bool big_endian
>
2031 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2033 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2036 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2037 p
!= rd
->relocs
.end();
2040 if (p
->data_shndx
== this->opd_shndx())
2042 uint64_t opd_size
= this->section_size(this->opd_shndx());
2043 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2046 this->init_opd(opd_size
);
2047 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2048 rd
->local_symbols
->data());
2056 // Read the symbols then set up st_other vector.
2058 template<int size
, bool big_endian
>
2060 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2062 this->base_read_symbols(sd
);
2065 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2066 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2067 const unsigned int loccount
= this->do_local_symbol_count();
2070 this->st_other_
.resize(loccount
);
2071 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2072 off_t locsize
= loccount
* sym_size
;
2073 const unsigned int symtab_shndx
= this->symtab_shndx();
2074 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2075 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2076 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2077 locsize
, true, false);
2079 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2081 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2082 unsigned char st_other
= sym
.get_st_other();
2083 this->st_other_
[i
] = st_other
;
2084 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2086 if (this->abiversion() == 0)
2087 this->set_abiversion(2);
2088 else if (this->abiversion() < 2)
2089 gold_error(_("%s: local symbol %d has invalid st_other"
2090 " for ABI version 1"),
2091 this->name().c_str(), i
);
2098 template<int size
, bool big_endian
>
2100 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2102 this->e_flags_
|= ver
;
2103 if (this->abiversion() != 0)
2105 Target_powerpc
<size
, big_endian
>* target
=
2106 static_cast<Target_powerpc
<size
, big_endian
>*>(
2107 parameters
->sized_target
<size
, big_endian
>());
2108 if (target
->abiversion() == 0)
2109 target
->set_abiversion(this->abiversion());
2110 else if (target
->abiversion() != this->abiversion())
2111 gold_error(_("%s: ABI version %d is not compatible "
2112 "with ABI version %d output"),
2113 this->name().c_str(),
2114 this->abiversion(), target
->abiversion());
2119 // Call Sized_dynobj::base_read_symbols to read the symbols then
2120 // read .opd from a dynamic object, filling in opd_ent_ vector,
2122 template<int size
, bool big_endian
>
2124 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2126 this->base_read_symbols(sd
);
2129 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2130 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2131 const unsigned char* namesu
= sd
->section_names
->data();
2132 const char* names
= reinterpret_cast<const char*>(namesu
);
2133 const unsigned char* s
= NULL
;
2134 const unsigned char* opd
;
2135 section_size_type opd_size
;
2137 // Find and read .opd section.
2140 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2141 sd
->section_names_size
,
2146 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2147 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2148 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2150 if (this->abiversion() == 0)
2151 this->set_abiversion(1);
2152 else if (this->abiversion() > 1)
2153 gold_error(_("%s: .opd invalid in abiv%d"),
2154 this->name().c_str(), this->abiversion());
2156 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2157 this->opd_address_
= shdr
.get_sh_addr();
2158 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2159 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2165 // Build set of executable sections.
2166 // Using a set is probably overkill. There is likely to be only
2167 // a few executable sections, typically .init, .text and .fini,
2168 // and they are generally grouped together.
2169 typedef std::set
<Sec_info
> Exec_sections
;
2170 Exec_sections exec_sections
;
2172 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2174 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2175 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2176 && ((shdr
.get_sh_flags()
2177 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2178 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2179 && shdr
.get_sh_size() != 0)
2181 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2182 shdr
.get_sh_size(), i
));
2185 if (exec_sections
.empty())
2188 // Look over the OPD entries. This is complicated by the fact
2189 // that some binaries will use two-word entries while others
2190 // will use the standard three-word entries. In most cases
2191 // the third word (the environment pointer for languages like
2192 // Pascal) is unused and will be zero. If the third word is
2193 // used it should not be pointing into executable sections,
2195 this->init_opd(opd_size
);
2196 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2198 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2199 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2200 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2202 // Chances are that this is the third word of an OPD entry.
2204 typename
Exec_sections::const_iterator e
2205 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2206 if (e
!= exec_sections
.begin())
2209 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2211 // We have an address in an executable section.
2212 // VAL ought to be the function entry, set it up.
2213 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2214 // Skip second word of OPD entry, the TOC pointer.
2218 // If we didn't match any executable sections, we likely
2219 // have a non-zero third word in the OPD entry.
2224 // Relocate sections.
2226 template<int size
, bool big_endian
>
2228 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2229 const Symbol_table
* symtab
, const Layout
* layout
,
2230 const unsigned char* pshdrs
, Output_file
* of
,
2231 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2233 unsigned int start
= 1;
2235 && this->relatoc_
!= 0
2236 && !parameters
->options().relocatable())
2238 // Relocate .toc first.
2239 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2240 this->relatoc_
, this->relatoc_
);
2241 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2242 1, this->relatoc_
- 1);
2243 start
= this->relatoc_
+ 1;
2245 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2246 start
, this->shnum() - 1);
2249 // Set up some symbols.
2251 template<int size
, bool big_endian
>
2253 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2254 Symbol_table
* symtab
,
2259 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2260 // undefined when scanning relocs (and thus requires
2261 // non-relative dynamic relocs). The proper value will be
2263 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2264 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2266 Target_powerpc
<size
, big_endian
>* target
=
2267 static_cast<Target_powerpc
<size
, big_endian
>*>(
2268 parameters
->sized_target
<size
, big_endian
>());
2269 Output_data_got_powerpc
<size
, big_endian
>* got
2270 = target
->got_section(symtab
, layout
);
2271 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2272 Symbol_table::PREDEFINED
,
2276 elfcpp::STV_HIDDEN
, 0,
2280 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2281 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2282 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2284 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2286 = layout
->add_output_section_data(".sdata", 0,
2288 | elfcpp::SHF_WRITE
,
2289 sdata
, ORDER_SMALL_DATA
, false);
2290 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2291 Symbol_table::PREDEFINED
,
2292 os
, 32768, 0, elfcpp::STT_OBJECT
,
2293 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2299 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2300 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2301 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2303 Target_powerpc
<size
, big_endian
>* target
=
2304 static_cast<Target_powerpc
<size
, big_endian
>*>(
2305 parameters
->sized_target
<size
, big_endian
>());
2306 Output_data_got_powerpc
<size
, big_endian
>* got
2307 = target
->got_section(symtab
, layout
);
2308 symtab
->define_in_output_data(".TOC.", NULL
,
2309 Symbol_table::PREDEFINED
,
2313 elfcpp::STV_HIDDEN
, 0,
2319 // Set up PowerPC target specific relobj.
2321 template<int size
, bool big_endian
>
2323 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2324 const std::string
& name
,
2325 Input_file
* input_file
,
2326 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2328 int et
= ehdr
.get_e_type();
2329 // ET_EXEC files are valid input for --just-symbols/-R,
2330 // and we treat them as relocatable objects.
2331 if (et
== elfcpp::ET_REL
2332 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2334 Powerpc_relobj
<size
, big_endian
>* obj
=
2335 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2339 else if (et
== elfcpp::ET_DYN
)
2341 Powerpc_dynobj
<size
, big_endian
>* obj
=
2342 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2348 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2353 template<int size
, bool big_endian
>
2354 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2357 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2358 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2360 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2361 : Output_data_got
<size
, big_endian
>(),
2362 symtab_(symtab
), layout_(layout
),
2363 header_ent_cnt_(size
== 32 ? 3 : 1),
2364 header_index_(size
== 32 ? 0x2000 : 0)
2367 this->set_addralign(256);
2370 // Override all the Output_data_got methods we use so as to first call
2373 add_global(Symbol
* gsym
, unsigned int got_type
)
2375 this->reserve_ent();
2376 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2380 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2382 this->reserve_ent();
2383 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2387 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2388 { return this->add_global_plt(gsym
, got_type
); }
2391 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2392 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2394 this->reserve_ent();
2395 Output_data_got
<size
, big_endian
>::
2396 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2400 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2401 Output_data_reloc_generic
* rel_dyn
,
2402 unsigned int r_type_1
, unsigned int r_type_2
)
2404 this->reserve_ent(2);
2405 Output_data_got
<size
, big_endian
>::
2406 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2410 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2412 this->reserve_ent();
2413 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2418 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2420 this->reserve_ent();
2421 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2426 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2427 { return this->add_local_plt(object
, sym_index
, got_type
); }
2430 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2431 unsigned int got_type
,
2432 Output_data_reloc_generic
* rel_dyn
,
2433 unsigned int r_type
)
2435 this->reserve_ent(2);
2436 Output_data_got
<size
, big_endian
>::
2437 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2441 add_constant(Valtype constant
)
2443 this->reserve_ent();
2444 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2448 add_constant_pair(Valtype c1
, Valtype c2
)
2450 this->reserve_ent(2);
2451 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2454 // Offset of _GLOBAL_OFFSET_TABLE_.
2458 return this->got_offset(this->header_index_
);
2461 // Offset of base used to access the GOT/TOC.
2462 // The got/toc pointer reg will be set to this value.
2464 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2467 return this->g_o_t();
2469 return (this->output_section()->address()
2470 + object
->toc_base_offset()
2474 // Ensure our GOT has a header.
2476 set_final_data_size()
2478 if (this->header_ent_cnt_
!= 0)
2479 this->make_header();
2480 Output_data_got
<size
, big_endian
>::set_final_data_size();
2483 // First word of GOT header needs some values that are not
2484 // handled by Output_data_got so poke them in here.
2485 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2487 do_write(Output_file
* of
)
2490 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2491 val
= this->layout_
->dynamic_section()->address();
2493 val
= this->output_section()->address() + 0x8000;
2494 this->replace_constant(this->header_index_
, val
);
2495 Output_data_got
<size
, big_endian
>::do_write(of
);
2500 reserve_ent(unsigned int cnt
= 1)
2502 if (this->header_ent_cnt_
== 0)
2504 if (this->num_entries() + cnt
> this->header_index_
)
2505 this->make_header();
2511 this->header_ent_cnt_
= 0;
2512 this->header_index_
= this->num_entries();
2515 Output_data_got
<size
, big_endian
>::add_constant(0);
2516 Output_data_got
<size
, big_endian
>::add_constant(0);
2517 Output_data_got
<size
, big_endian
>::add_constant(0);
2519 // Define _GLOBAL_OFFSET_TABLE_ at the header
2520 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2523 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2524 sym
->set_value(this->g_o_t());
2527 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2528 Symbol_table::PREDEFINED
,
2529 this, this->g_o_t(), 0,
2532 elfcpp::STV_HIDDEN
, 0,
2536 Output_data_got
<size
, big_endian
>::add_constant(0);
2539 // Stashed pointers.
2540 Symbol_table
* symtab_
;
2544 unsigned int header_ent_cnt_
;
2545 // GOT header index.
2546 unsigned int header_index_
;
2549 // Get the GOT section, creating it if necessary.
2551 template<int size
, bool big_endian
>
2552 Output_data_got_powerpc
<size
, big_endian
>*
2553 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2556 if (this->got_
== NULL
)
2558 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2561 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2563 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2564 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2565 this->got_
, ORDER_DATA
, false);
2571 // Get the dynamic reloc section, creating it if necessary.
2573 template<int size
, bool big_endian
>
2574 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2575 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2577 if (this->rela_dyn_
== NULL
)
2579 gold_assert(layout
!= NULL
);
2580 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2581 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2582 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2583 ORDER_DYNAMIC_RELOCS
, false);
2585 return this->rela_dyn_
;
2588 // Similarly, but for ifunc symbols get the one for ifunc.
2590 template<int size
, bool big_endian
>
2591 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2592 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2597 return this->rela_dyn_section(layout
);
2599 if (this->iplt_
== NULL
)
2600 this->make_iplt_section(symtab
, layout
);
2601 return this->iplt_
->rel_plt();
2607 // Determine the stub group size. The group size is the absolute
2608 // value of the parameter --stub-group-size. If --stub-group-size
2609 // is passed a negative value, we restrict stubs to be always after
2610 // the stubbed branches.
2611 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2612 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2613 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2614 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2615 owner_(NULL
), output_section_(NULL
)
2619 // Return true iff input section can be handled by current stub
2622 can_add_to_stub_group(Output_section
* o
,
2623 const Output_section::Input_section
* i
,
2626 const Output_section::Input_section
*
2632 { return output_section_
; }
2635 set_output_and_owner(Output_section
* o
,
2636 const Output_section::Input_section
* i
)
2638 this->output_section_
= o
;
2647 // Adding group sections before the stubs.
2648 FINDING_STUB_SECTION
,
2649 // Adding group sections after the stubs.
2653 uint32_t stub_group_size_
;
2654 bool stubs_always_after_branch_
;
2655 bool suppress_size_errors_
;
2656 // True if a stub group can serve multiple output sections.
2659 // Current max size of group. Starts at stub_group_size_ but is
2660 // reduced to stub_group_size_/1024 on seeing a section with
2661 // external conditional branches.
2662 uint32_t group_size_
;
2663 uint64_t group_start_addr_
;
2664 // owner_ and output_section_ specify the section to which stubs are
2665 // attached. The stubs are placed at the end of this section.
2666 const Output_section::Input_section
* owner_
;
2667 Output_section
* output_section_
;
2670 // Return true iff input section can be handled by current stub
2671 // group. Sections are presented to this function in order,
2672 // so the first section is the head of the group.
2675 Stub_control::can_add_to_stub_group(Output_section
* o
,
2676 const Output_section::Input_section
* i
,
2679 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2681 uint64_t start_addr
= o
->address();
2684 // .init and .fini sections are pasted together to form a single
2685 // function. We can't be adding stubs in the middle of the function.
2686 this_size
= o
->data_size();
2689 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2690 this_size
= i
->data_size();
2693 uint64_t end_addr
= start_addr
+ this_size
;
2694 uint32_t group_size
= this->stub_group_size_
;
2696 this->group_size_
= group_size
= group_size
>> 10;
2698 if (this_size
> group_size
&& !this->suppress_size_errors_
)
2699 gold_warning(_("%s:%s exceeds group size"),
2700 i
->relobj()->name().c_str(),
2701 i
->relobj()->section_name(i
->shndx()).c_str());
2703 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
2704 has14
? " 14bit" : "",
2705 i
->relobj()->name().c_str(),
2706 i
->relobj()->section_name(i
->shndx()).c_str(),
2707 (long long) this_size
,
2708 (this->state_
== NO_GROUP
2710 : (long long) end_addr
- this->group_start_addr_
));
2712 if (this->state_
== NO_GROUP
)
2714 // Only here on very first use of Stub_control
2716 this->output_section_
= o
;
2717 this->state_
= FINDING_STUB_SECTION
;
2718 this->group_size_
= group_size
;
2719 this->group_start_addr_
= start_addr
;
2722 else if (!this->multi_os_
&& this->output_section_
!= o
)
2724 else if (this->state_
== HAS_STUB_SECTION
)
2726 // Can we add this section, which is after the stubs, to the
2728 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
2731 else if (this->state_
== FINDING_STUB_SECTION
)
2733 if ((whole_sec
&& this->output_section_
== o
)
2734 || end_addr
- this->group_start_addr_
<= this->group_size_
)
2736 // Stubs are added at the end of "owner_".
2738 this->output_section_
= o
;
2741 // The group before the stubs has reached maximum size.
2742 // Now see about adding sections after the stubs to the
2743 // group. If the current section has a 14-bit branch and
2744 // the group before the stubs exceeds group_size_ (because
2745 // they didn't have 14-bit branches), don't add sections
2746 // after the stubs: The size of stubs for such a large
2747 // group may exceed the reach of a 14-bit branch.
2748 if (!this->stubs_always_after_branch_
2749 && this_size
<= this->group_size_
2750 && start_addr
- this->group_start_addr_
<= this->group_size_
)
2752 gold_debug(DEBUG_TARGET
, "adding after stubs");
2753 this->state_
= HAS_STUB_SECTION
;
2754 this->group_start_addr_
= start_addr
;
2761 gold_debug(DEBUG_TARGET
,
2762 !this->multi_os_
&& this->output_section_
!= o
2763 ? "nope, new output section\n"
2764 : "nope, didn't fit\n");
2766 // The section fails to fit in the current group. Set up a few
2767 // things for the next group. owner_ and output_section_ will be
2768 // set later after we've retrieved those values for the current
2770 this->state_
= FINDING_STUB_SECTION
;
2771 this->group_size_
= group_size
;
2772 this->group_start_addr_
= start_addr
;
2776 // Look over all the input sections, deciding where to place stubs.
2778 template<int size
, bool big_endian
>
2780 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2782 bool no_size_errors
)
2784 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
2785 parameters
->options().stub_group_multi());
2787 // Group input sections and insert stub table
2788 Stub_table_owner
* table_owner
= NULL
;
2789 std::vector
<Stub_table_owner
*> tables
;
2790 Layout::Section_list section_list
;
2791 layout
->get_executable_sections(§ion_list
);
2792 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2793 for (Layout::Section_list::iterator o
= section_list
.begin();
2794 o
!= section_list
.end();
2797 typedef Output_section::Input_section_list Input_section_list
;
2798 for (Input_section_list::const_iterator i
2799 = (*o
)->input_sections().begin();
2800 i
!= (*o
)->input_sections().end();
2803 if (i
->is_input_section()
2804 || i
->is_relaxed_input_section())
2806 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2807 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2808 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2809 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2811 table_owner
->output_section
= stub_control
.output_section();
2812 table_owner
->owner
= stub_control
.owner();
2813 stub_control
.set_output_and_owner(*o
, &*i
);
2816 if (table_owner
== NULL
)
2818 table_owner
= new Stub_table_owner
;
2819 tables
.push_back(table_owner
);
2821 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2825 if (table_owner
!= NULL
)
2827 table_owner
->output_section
= stub_control
.output_section();
2828 table_owner
->owner
= stub_control
.owner();;
2830 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2834 Stub_table
<size
, big_endian
>* stub_table
;
2836 if ((*t
)->owner
->is_input_section())
2837 stub_table
= new Stub_table
<size
, big_endian
>(this,
2838 (*t
)->output_section
,
2840 else if ((*t
)->owner
->is_relaxed_input_section())
2841 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2842 (*t
)->owner
->relaxed_input_section());
2845 this->stub_tables_
.push_back(stub_table
);
2850 static unsigned long
2851 max_branch_delta (unsigned int r_type
)
2853 if (r_type
== elfcpp::R_POWERPC_REL14
2854 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2855 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2857 if (r_type
== elfcpp::R_POWERPC_REL24
2858 || r_type
== elfcpp::R_PPC_PLTREL24
2859 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2864 // If this branch needs a plt call stub, or a long branch stub, make one.
2866 template<int size
, bool big_endian
>
2868 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2869 Stub_table
<size
, big_endian
>* stub_table
,
2870 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2871 Symbol_table
* symtab
) const
2873 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2874 if (sym
!= NULL
&& sym
->is_forwarder())
2875 sym
= symtab
->resolve_forwards(sym
);
2876 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2877 Target_powerpc
<size
, big_endian
>* target
=
2878 static_cast<Target_powerpc
<size
, big_endian
>*>(
2879 parameters
->sized_target
<size
, big_endian
>());
2883 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2884 : this->object_
->local_has_plt_offset(this->r_sym_
))
2888 && target
->abiversion() >= 2
2889 && !parameters
->options().output_is_position_independent()
2890 && !is_branch_reloc(this->r_type_
))
2891 target
->glink_section()->add_global_entry(gsym
);
2894 if (stub_table
== NULL
)
2895 stub_table
= this->object_
->stub_table(this->shndx_
);
2896 if (stub_table
== NULL
)
2898 // This is a ref from a data section to an ifunc symbol.
2899 stub_table
= ifunc_stub_table
;
2901 gold_assert(stub_table
!= NULL
);
2902 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2903 if (from
!= invalid_address
)
2904 from
+= (this->object_
->output_section(this->shndx_
)->address()
2907 ok
= stub_table
->add_plt_call_entry(from
,
2908 this->object_
, gsym
,
2909 this->r_type_
, this->addend_
);
2911 ok
= stub_table
->add_plt_call_entry(from
,
2912 this->object_
, this->r_sym_
,
2913 this->r_type_
, this->addend_
);
2918 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2919 if (max_branch_offset
== 0)
2921 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2922 gold_assert(from
!= invalid_address
);
2923 from
+= (this->object_
->output_section(this->shndx_
)->address()
2928 switch (gsym
->source())
2930 case Symbol::FROM_OBJECT
:
2932 Object
* symobj
= gsym
->object();
2933 if (symobj
->is_dynamic()
2934 || symobj
->pluginobj() != NULL
)
2937 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2938 if (shndx
== elfcpp::SHN_UNDEF
)
2943 case Symbol::IS_UNDEFINED
:
2949 Symbol_table::Compute_final_value_status status
;
2950 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2951 if (status
!= Symbol_table::CFVS_OK
)
2954 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2958 const Symbol_value
<size
>* psymval
2959 = this->object_
->local_symbol(this->r_sym_
);
2960 Symbol_value
<size
> symval
;
2961 if (psymval
->is_section_symbol())
2962 symval
.set_is_section_symbol();
2963 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2964 typename
ObjType::Compute_final_local_value_status status
2965 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2967 if (status
!= ObjType::CFLV_OK
2968 || !symval
.has_output_value())
2970 to
= symval
.value(this->object_
, 0);
2972 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2974 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2975 to
+= this->addend_
;
2976 if (stub_table
== NULL
)
2977 stub_table
= this->object_
->stub_table(this->shndx_
);
2978 if (size
== 64 && target
->abiversion() < 2)
2980 unsigned int dest_shndx
;
2981 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2985 Address delta
= to
- from
;
2986 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2988 if (stub_table
== NULL
)
2990 gold_warning(_("%s:%s: branch in non-executable section,"
2991 " no long branch stub for you"),
2992 this->object_
->name().c_str(),
2993 this->object_
->section_name(this->shndx_
).c_str());
2996 bool save_res
= (size
== 64
2998 && gsym
->source() == Symbol::IN_OUTPUT_DATA
2999 && gsym
->output_data() == target
->savres_section());
3000 ok
= stub_table
->add_long_branch_entry(this->object_
,
3002 from
, to
, save_res
);
3006 gold_debug(DEBUG_TARGET
,
3007 "branch at %s:%s+%#lx\n"
3008 "can't reach stub attached to %s:%s",
3009 this->object_
->name().c_str(),
3010 this->object_
->section_name(this->shndx_
).c_str(),
3011 (unsigned long) this->offset_
,
3012 stub_table
->relobj()->name().c_str(),
3013 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3018 // Relaxation hook. This is where we do stub generation.
3020 template<int size
, bool big_endian
>
3022 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3023 const Input_objects
*,
3024 Symbol_table
* symtab
,
3028 unsigned int prev_brlt_size
= 0;
3032 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3034 && this->abiversion() < 2
3036 && !parameters
->options().user_set_plt_thread_safe())
3038 static const char* const thread_starter
[] =
3042 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3044 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3045 "mq_notify", "create_timer",
3050 "GOMP_parallel_start",
3051 "GOMP_parallel_loop_static",
3052 "GOMP_parallel_loop_static_start",
3053 "GOMP_parallel_loop_dynamic",
3054 "GOMP_parallel_loop_dynamic_start",
3055 "GOMP_parallel_loop_guided",
3056 "GOMP_parallel_loop_guided_start",
3057 "GOMP_parallel_loop_runtime",
3058 "GOMP_parallel_loop_runtime_start",
3059 "GOMP_parallel_sections",
3060 "GOMP_parallel_sections_start",
3065 if (parameters
->options().shared())
3069 for (unsigned int i
= 0;
3070 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3073 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3074 thread_safe
= (sym
!= NULL
3076 && sym
->in_real_elf());
3082 this->plt_thread_safe_
= thread_safe
;
3087 this->stub_group_size_
= parameters
->options().stub_group_size();
3088 bool no_size_errors
= true;
3089 if (this->stub_group_size_
== 1)
3090 this->stub_group_size_
= 0x1c00000;
3091 else if (this->stub_group_size_
== -1)
3092 this->stub_group_size_
= -0x1e00000;
3094 no_size_errors
= false;
3095 this->group_sections(layout
, task
, no_size_errors
);
3097 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3099 this->branch_lookup_table_
.clear();
3100 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3101 p
!= this->stub_tables_
.end();
3104 (*p
)->clear_stubs(true);
3106 this->stub_tables_
.clear();
3107 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3108 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3109 program_name
, this->stub_group_size_
);
3110 this->group_sections(layout
, task
, true);
3113 // We need address of stub tables valid for make_stub.
3114 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3115 p
!= this->stub_tables_
.end();
3118 const Powerpc_relobj
<size
, big_endian
>* object
3119 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3120 Address off
= object
->get_output_section_offset((*p
)->shndx());
3121 gold_assert(off
!= invalid_address
);
3122 Output_section
* os
= (*p
)->output_section();
3123 (*p
)->set_address_and_size(os
, off
);
3128 // Clear plt call stubs, long branch stubs and branch lookup table.
3129 prev_brlt_size
= this->branch_lookup_table_
.size();
3130 this->branch_lookup_table_
.clear();
3131 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3132 p
!= this->stub_tables_
.end();
3135 (*p
)->clear_stubs(false);
3139 // Build all the stubs.
3140 this->relax_failed_
= false;
3141 Stub_table
<size
, big_endian
>* ifunc_stub_table
3142 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3143 Stub_table
<size
, big_endian
>* one_stub_table
3144 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3145 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3146 b
!= this->branch_info_
.end();
3149 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3150 && !this->relax_failed_
)
3152 this->relax_failed_
= true;
3153 this->relax_fail_count_
++;
3154 if (this->relax_fail_count_
< 3)
3159 // Did anything change size?
3160 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3161 bool again
= num_huge_branches
!= prev_brlt_size
;
3162 if (size
== 64 && num_huge_branches
!= 0)
3163 this->make_brlt_section(layout
);
3164 if (size
== 64 && again
)
3165 this->brlt_section_
->set_current_size(num_huge_branches
);
3167 typedef Unordered_set
<Output_section
*> Output_sections
;
3168 Output_sections os_need_update
;
3169 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3170 p
!= this->stub_tables_
.end();
3173 if ((*p
)->size_update())
3176 (*p
)->add_eh_frame(layout
);
3177 os_need_update
.insert((*p
)->output_section());
3181 // Set output section offsets for all input sections in an output
3182 // section that just changed size. Anything past the stubs will
3184 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3185 p
!= os_need_update
.end();
3188 Output_section
* os
= *p
;
3190 typedef Output_section::Input_section_list Input_section_list
;
3191 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3192 i
!= os
->input_sections().end();
3195 off
= align_address(off
, i
->addralign());
3196 if (i
->is_input_section() || i
->is_relaxed_input_section())
3197 i
->relobj()->set_section_offset(i
->shndx(), off
);
3198 if (i
->is_relaxed_input_section())
3200 Stub_table
<size
, big_endian
>* stub_table
3201 = static_cast<Stub_table
<size
, big_endian
>*>(
3202 i
->relaxed_input_section());
3203 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3204 off
+= stub_table_size
;
3205 // After a few iterations, set current stub table size
3206 // as min size threshold, so later stub tables can only
3209 stub_table
->set_min_size_threshold(stub_table_size
);
3212 off
+= i
->data_size();
3214 // If .branch_lt is part of this output section, then we have
3215 // just done the offset adjustment.
3216 os
->clear_section_offsets_need_adjustment();
3221 && num_huge_branches
!= 0
3222 && parameters
->options().output_is_position_independent())
3224 // Fill in the BRLT relocs.
3225 this->brlt_section_
->reset_brlt_sizes();
3226 for (typename
Branch_lookup_table::const_iterator p
3227 = this->branch_lookup_table_
.begin();
3228 p
!= this->branch_lookup_table_
.end();
3231 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3233 this->brlt_section_
->finalize_brlt_sizes();
3238 template<int size
, bool big_endian
>
3240 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3241 unsigned char* oview
,
3245 uint64_t address
= plt
->address();
3246 off_t len
= plt
->data_size();
3248 if (plt
== this->glink_
)
3250 // See Output_data_glink::do_write() for glink contents.
3253 gold_assert(parameters
->doing_static_link());
3254 // Static linking may need stubs, to support ifunc and long
3255 // branches. We need to create an output section for
3256 // .eh_frame early in the link process, to have a place to
3257 // attach stub .eh_frame info. We also need to have
3258 // registered a CIE that matches the stub CIE. Both of
3259 // these requirements are satisfied by creating an FDE and
3260 // CIE for .glink, even though static linking will leave
3261 // .glink zero length.
3262 // ??? Hopefully generating an FDE with a zero address range
3263 // won't confuse anything that consumes .eh_frame info.
3265 else if (size
== 64)
3267 // There is one word before __glink_PLTresolve
3271 else if (parameters
->options().output_is_position_independent())
3273 // There are two FDEs for a position independent glink.
3274 // The first covers the branch table, the second
3275 // __glink_PLTresolve at the end of glink.
3276 off_t resolve_size
= this->glink_
->pltresolve_size
;
3277 if (oview
[9] == elfcpp::DW_CFA_nop
)
3278 len
-= resolve_size
;
3281 address
+= len
- resolve_size
;
3288 // Must be a stub table.
3289 const Stub_table
<size
, big_endian
>* stub_table
3290 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3291 uint64_t stub_address
= stub_table
->stub_address();
3292 len
-= stub_address
- address
;
3293 address
= stub_address
;
3296 *paddress
= address
;
3300 // A class to handle the PLT data.
3302 template<int size
, bool big_endian
>
3303 class Output_data_plt_powerpc
: public Output_section_data_build
3306 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3307 size
, big_endian
> Reloc_section
;
3309 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3310 Reloc_section
* plt_rel
,
3312 : Output_section_data_build(size
== 32 ? 4 : 8),
3318 // Add an entry to the PLT.
3323 add_ifunc_entry(Symbol
*);
3326 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3328 // Return the .rela.plt section data.
3335 // Return the number of PLT entries.
3339 if (this->current_data_size() == 0)
3341 return ((this->current_data_size() - this->first_plt_entry_offset())
3342 / this->plt_entry_size());
3347 do_adjust_output_section(Output_section
* os
)
3352 // Write to a map file.
3354 do_print_to_mapfile(Mapfile
* mapfile
) const
3355 { mapfile
->print_output_data(this, this->name_
); }
3358 // Return the offset of the first non-reserved PLT entry.
3360 first_plt_entry_offset() const
3362 // IPLT has no reserved entry.
3363 if (this->name_
[3] == 'I')
3365 return this->targ_
->first_plt_entry_offset();
3368 // Return the size of each PLT entry.
3370 plt_entry_size() const
3372 return this->targ_
->plt_entry_size();
3375 // Write out the PLT data.
3377 do_write(Output_file
*);
3379 // The reloc section.
3380 Reloc_section
* rel_
;
3381 // Allows access to .glink for do_write.
3382 Target_powerpc
<size
, big_endian
>* targ_
;
3383 // What to report in map file.
3387 // Add an entry to the PLT.
3389 template<int size
, bool big_endian
>
3391 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3393 if (!gsym
->has_plt_offset())
3395 section_size_type off
= this->current_data_size();
3397 off
+= this->first_plt_entry_offset();
3398 gsym
->set_plt_offset(off
);
3399 gsym
->set_needs_dynsym_entry();
3400 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3401 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3402 off
+= this->plt_entry_size();
3403 this->set_current_data_size(off
);
3407 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3409 template<int size
, bool big_endian
>
3411 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3413 if (!gsym
->has_plt_offset())
3415 section_size_type off
= this->current_data_size();
3416 gsym
->set_plt_offset(off
);
3417 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3418 if (size
== 64 && this->targ_
->abiversion() < 2)
3419 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3420 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3421 off
+= this->plt_entry_size();
3422 this->set_current_data_size(off
);
3426 // Add an entry for a local ifunc symbol to the IPLT.
3428 template<int size
, bool big_endian
>
3430 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3431 Sized_relobj_file
<size
, big_endian
>* relobj
,
3432 unsigned int local_sym_index
)
3434 if (!relobj
->local_has_plt_offset(local_sym_index
))
3436 section_size_type off
= this->current_data_size();
3437 relobj
->set_local_plt_offset(local_sym_index
, off
);
3438 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3439 if (size
== 64 && this->targ_
->abiversion() < 2)
3440 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3441 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3443 off
+= this->plt_entry_size();
3444 this->set_current_data_size(off
);
3448 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3449 static const uint32_t add_2_2_11
= 0x7c425a14;
3450 static const uint32_t add_2_2_12
= 0x7c426214;
3451 static const uint32_t add_3_3_2
= 0x7c631214;
3452 static const uint32_t add_3_3_13
= 0x7c636a14;
3453 static const uint32_t add_11_0_11
= 0x7d605a14;
3454 static const uint32_t add_11_2_11
= 0x7d625a14;
3455 static const uint32_t add_11_11_2
= 0x7d6b1214;
3456 static const uint32_t addi_0_12
= 0x380c0000;
3457 static const uint32_t addi_2_2
= 0x38420000;
3458 static const uint32_t addi_3_3
= 0x38630000;
3459 static const uint32_t addi_11_11
= 0x396b0000;
3460 static const uint32_t addi_12_1
= 0x39810000;
3461 static const uint32_t addi_12_12
= 0x398c0000;
3462 static const uint32_t addis_0_2
= 0x3c020000;
3463 static const uint32_t addis_0_13
= 0x3c0d0000;
3464 static const uint32_t addis_2_12
= 0x3c4c0000;
3465 static const uint32_t addis_11_2
= 0x3d620000;
3466 static const uint32_t addis_11_11
= 0x3d6b0000;
3467 static const uint32_t addis_11_30
= 0x3d7e0000;
3468 static const uint32_t addis_12_1
= 0x3d810000;
3469 static const uint32_t addis_12_2
= 0x3d820000;
3470 static const uint32_t addis_12_12
= 0x3d8c0000;
3471 static const uint32_t b
= 0x48000000;
3472 static const uint32_t bcl_20_31
= 0x429f0005;
3473 static const uint32_t bctr
= 0x4e800420;
3474 static const uint32_t blr
= 0x4e800020;
3475 static const uint32_t bnectr_p4
= 0x4ce20420;
3476 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3477 static const uint32_t cmpldi_2_0
= 0x28220000;
3478 static const uint32_t cror_15_15_15
= 0x4def7b82;
3479 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3480 static const uint32_t ld_0_1
= 0xe8010000;
3481 static const uint32_t ld_0_12
= 0xe80c0000;
3482 static const uint32_t ld_2_1
= 0xe8410000;
3483 static const uint32_t ld_2_2
= 0xe8420000;
3484 static const uint32_t ld_2_11
= 0xe84b0000;
3485 static const uint32_t ld_2_12
= 0xe84c0000;
3486 static const uint32_t ld_11_2
= 0xe9620000;
3487 static const uint32_t ld_11_11
= 0xe96b0000;
3488 static const uint32_t ld_12_2
= 0xe9820000;
3489 static const uint32_t ld_12_11
= 0xe98b0000;
3490 static const uint32_t ld_12_12
= 0xe98c0000;
3491 static const uint32_t lfd_0_1
= 0xc8010000;
3492 static const uint32_t li_0_0
= 0x38000000;
3493 static const uint32_t li_12_0
= 0x39800000;
3494 static const uint32_t lis_0
= 0x3c000000;
3495 static const uint32_t lis_2
= 0x3c400000;
3496 static const uint32_t lis_11
= 0x3d600000;
3497 static const uint32_t lis_12
= 0x3d800000;
3498 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3499 static const uint32_t lwz_0_12
= 0x800c0000;
3500 static const uint32_t lwz_11_11
= 0x816b0000;
3501 static const uint32_t lwz_11_30
= 0x817e0000;
3502 static const uint32_t lwz_12_12
= 0x818c0000;
3503 static const uint32_t lwzu_0_12
= 0x840c0000;
3504 static const uint32_t mflr_0
= 0x7c0802a6;
3505 static const uint32_t mflr_11
= 0x7d6802a6;
3506 static const uint32_t mflr_12
= 0x7d8802a6;
3507 static const uint32_t mtctr_0
= 0x7c0903a6;
3508 static const uint32_t mtctr_11
= 0x7d6903a6;
3509 static const uint32_t mtctr_12
= 0x7d8903a6;
3510 static const uint32_t mtlr_0
= 0x7c0803a6;
3511 static const uint32_t mtlr_12
= 0x7d8803a6;
3512 static const uint32_t nop
= 0x60000000;
3513 static const uint32_t ori_0_0_0
= 0x60000000;
3514 static const uint32_t srdi_0_0_2
= 0x7800f082;
3515 static const uint32_t std_0_1
= 0xf8010000;
3516 static const uint32_t std_0_12
= 0xf80c0000;
3517 static const uint32_t std_2_1
= 0xf8410000;
3518 static const uint32_t stfd_0_1
= 0xd8010000;
3519 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3520 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3521 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3522 static const uint32_t xor_2_12_12
= 0x7d826278;
3523 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3525 // Write out the PLT.
3527 template<int size
, bool big_endian
>
3529 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3531 if (size
== 32 && this->name_
[3] != 'I')
3533 const section_size_type offset
= this->offset();
3534 const section_size_type oview_size
3535 = convert_to_section_size_type(this->data_size());
3536 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3537 unsigned char* pov
= oview
;
3538 unsigned char* endpov
= oview
+ oview_size
;
3540 // The address of the .glink branch table
3541 const Output_data_glink
<size
, big_endian
>* glink
3542 = this->targ_
->glink_section();
3543 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3545 while (pov
< endpov
)
3547 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3552 of
->write_output_view(offset
, oview_size
, oview
);
3556 // Create the PLT section.
3558 template<int size
, bool big_endian
>
3560 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3563 if (this->plt_
== NULL
)
3565 if (this->got_
== NULL
)
3566 this->got_section(symtab
, layout
);
3568 if (this->glink_
== NULL
)
3569 make_glink_section(layout
);
3571 // Ensure that .rela.dyn always appears before .rela.plt This is
3572 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3573 // needs to include .rela.plt in its range.
3574 this->rela_dyn_section(layout
);
3576 Reloc_section
* plt_rel
= new Reloc_section(false);
3577 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3578 elfcpp::SHF_ALLOC
, plt_rel
,
3579 ORDER_DYNAMIC_PLT_RELOCS
, false);
3581 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3583 layout
->add_output_section_data(".plt",
3585 ? elfcpp::SHT_PROGBITS
3586 : elfcpp::SHT_NOBITS
),
3587 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3594 Output_section
* rela_plt_os
= plt_rel
->output_section();
3595 rela_plt_os
->set_info_section(this->plt_
->output_section());
3599 // Create the IPLT section.
3601 template<int size
, bool big_endian
>
3603 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3606 if (this->iplt_
== NULL
)
3608 this->make_plt_section(symtab
, layout
);
3610 Reloc_section
* iplt_rel
= new Reloc_section(false);
3611 if (this->rela_dyn_
->output_section())
3612 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3614 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3616 if (this->plt_
->output_section())
3617 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3621 // A section for huge long branch addresses, similar to plt section.
3623 template<int size
, bool big_endian
>
3624 class Output_data_brlt_powerpc
: public Output_section_data_build
3627 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3628 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3629 size
, big_endian
> Reloc_section
;
3631 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3632 Reloc_section
* brlt_rel
)
3633 : Output_section_data_build(size
== 32 ? 4 : 8),
3641 this->reset_data_size();
3642 this->rel_
->reset_data_size();
3646 finalize_brlt_sizes()
3648 this->finalize_data_size();
3649 this->rel_
->finalize_data_size();
3652 // Add a reloc for an entry in the BRLT.
3654 add_reloc(Address to
, unsigned int off
)
3655 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3657 // Update section and reloc section size.
3659 set_current_size(unsigned int num_branches
)
3661 this->reset_address_and_file_offset();
3662 this->set_current_data_size(num_branches
* 16);
3663 this->finalize_data_size();
3664 Output_section
* os
= this->output_section();
3665 os
->set_section_offsets_need_adjustment();
3666 if (this->rel_
!= NULL
)
3668 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3669 this->rel_
->reset_address_and_file_offset();
3670 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3671 this->rel_
->finalize_data_size();
3672 Output_section
* os
= this->rel_
->output_section();
3673 os
->set_section_offsets_need_adjustment();
3679 do_adjust_output_section(Output_section
* os
)
3684 // Write to a map file.
3686 do_print_to_mapfile(Mapfile
* mapfile
) const
3687 { mapfile
->print_output_data(this, "** BRLT"); }
3690 // Write out the BRLT data.
3692 do_write(Output_file
*);
3694 // The reloc section.
3695 Reloc_section
* rel_
;
3696 Target_powerpc
<size
, big_endian
>* targ_
;
3699 // Make the branch lookup table section.
3701 template<int size
, bool big_endian
>
3703 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3705 if (size
== 64 && this->brlt_section_
== NULL
)
3707 Reloc_section
* brlt_rel
= NULL
;
3708 bool is_pic
= parameters
->options().output_is_position_independent();
3711 // When PIC we can't fill in .branch_lt (like .plt it can be
3712 // a bss style section) but must initialise at runtime via
3713 // dynamic relocations.
3714 this->rela_dyn_section(layout
);
3715 brlt_rel
= new Reloc_section(false);
3716 if (this->rela_dyn_
->output_section())
3717 this->rela_dyn_
->output_section()
3718 ->add_output_section_data(brlt_rel
);
3721 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3722 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
3723 this->plt_
->output_section()
3724 ->add_output_section_data(this->brlt_section_
);
3726 layout
->add_output_section_data(".branch_lt",
3727 (is_pic
? elfcpp::SHT_NOBITS
3728 : elfcpp::SHT_PROGBITS
),
3729 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3730 this->brlt_section_
,
3731 (is_pic
? ORDER_SMALL_BSS
3732 : ORDER_SMALL_DATA
),
3737 // Write out .branch_lt when non-PIC.
3739 template<int size
, bool big_endian
>
3741 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3743 if (size
== 64 && !parameters
->options().output_is_position_independent())
3745 const section_size_type offset
= this->offset();
3746 const section_size_type oview_size
3747 = convert_to_section_size_type(this->data_size());
3748 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3750 this->targ_
->write_branch_lookup_table(oview
);
3751 of
->write_output_view(offset
, oview_size
, oview
);
3755 static inline uint32_t
3761 static inline uint32_t
3767 static inline uint32_t
3770 return hi(a
+ 0x8000);
3776 static const unsigned char eh_frame_cie
[12];
3780 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3783 'z', 'R', 0, // Augmentation string.
3784 4, // Code alignment.
3785 0x80 - size
/ 8 , // Data alignment.
3787 1, // Augmentation size.
3788 (elfcpp::DW_EH_PE_pcrel
3789 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3790 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3793 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3794 static const unsigned char glink_eh_frame_fde_64v1
[] =
3796 0, 0, 0, 0, // Replaced with offset to .glink.
3797 0, 0, 0, 0, // Replaced with size of .glink.
3798 0, // Augmentation size.
3799 elfcpp::DW_CFA_advance_loc
+ 1,
3800 elfcpp::DW_CFA_register
, 65, 12,
3801 elfcpp::DW_CFA_advance_loc
+ 4,
3802 elfcpp::DW_CFA_restore_extended
, 65
3805 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3806 static const unsigned char glink_eh_frame_fde_64v2
[] =
3808 0, 0, 0, 0, // Replaced with offset to .glink.
3809 0, 0, 0, 0, // Replaced with size of .glink.
3810 0, // Augmentation size.
3811 elfcpp::DW_CFA_advance_loc
+ 1,
3812 elfcpp::DW_CFA_register
, 65, 0,
3813 elfcpp::DW_CFA_advance_loc
+ 4,
3814 elfcpp::DW_CFA_restore_extended
, 65
3817 // Describe __glink_PLTresolve use of LR, 32-bit version.
3818 static const unsigned char glink_eh_frame_fde_32
[] =
3820 0, 0, 0, 0, // Replaced with offset to .glink.
3821 0, 0, 0, 0, // Replaced with size of .glink.
3822 0, // Augmentation size.
3823 elfcpp::DW_CFA_advance_loc
+ 2,
3824 elfcpp::DW_CFA_register
, 65, 0,
3825 elfcpp::DW_CFA_advance_loc
+ 4,
3826 elfcpp::DW_CFA_restore_extended
, 65
3829 static const unsigned char default_fde
[] =
3831 0, 0, 0, 0, // Replaced with offset to stubs.
3832 0, 0, 0, 0, // Replaced with size of stubs.
3833 0, // Augmentation size.
3834 elfcpp::DW_CFA_nop
, // Pad.
3839 template<bool big_endian
>
3841 write_insn(unsigned char* p
, uint32_t v
)
3843 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3846 // Stub_table holds information about plt and long branch stubs.
3847 // Stubs are built in an area following some input section determined
3848 // by group_sections(). This input section is converted to a relaxed
3849 // input section allowing it to be resized to accommodate the stubs
3851 template<int size
, bool big_endian
>
3852 class Stub_table
: public Output_relaxed_input_section
3855 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3856 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3858 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3859 Output_section
* output_section
,
3860 const Output_section::Input_section
* owner
)
3861 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3863 ->section_addralign(owner
->shndx())),
3864 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3865 orig_data_size_(owner
->current_data_size()),
3866 plt_size_(0), last_plt_size_(0),
3867 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
3868 eh_frame_added_(false), need_save_res_(false)
3870 this->set_output_section(output_section
);
3872 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3873 new_relaxed
.push_back(this);
3874 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3877 // Add a plt call stub.
3879 add_plt_call_entry(Address
,
3880 const Sized_relobj_file
<size
, big_endian
>*,
3886 add_plt_call_entry(Address
,
3887 const Sized_relobj_file
<size
, big_endian
>*,
3892 // Find a given plt call stub.
3894 find_plt_call_entry(const Symbol
*) const;
3897 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3898 unsigned int) const;
3901 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3907 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3912 // Add a long branch stub.
3914 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3915 unsigned int, Address
, Address
, bool);
3918 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3922 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3924 Address max_branch_offset
= max_branch_delta(r_type
);
3925 if (max_branch_offset
== 0)
3927 gold_assert(from
!= invalid_address
);
3928 Address loc
= off
+ this->stub_address();
3929 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3933 clear_stubs(bool all
)
3935 this->plt_call_stubs_
.clear();
3936 this->plt_size_
= 0;
3937 this->long_branch_stubs_
.clear();
3938 this->branch_size_
= 0;
3939 this->need_save_res_
= false;
3942 this->last_plt_size_
= 0;
3943 this->last_branch_size_
= 0;
3948 set_address_and_size(const Output_section
* os
, Address off
)
3950 Address start_off
= off
;
3951 off
+= this->orig_data_size_
;
3952 Address my_size
= this->plt_size_
+ this->branch_size_
;
3953 if (this->need_save_res_
)
3954 my_size
+= this->targ_
->savres_section()->data_size();
3956 off
= align_address(off
, this->stub_align());
3957 // Include original section size and alignment padding in size
3958 my_size
+= off
- start_off
;
3959 // Ensure new size is always larger than min size
3960 // threshold. Alignment requirement is included in "my_size", so
3961 // increase "my_size" does not invalidate alignment.
3962 if (my_size
< this->min_size_threshold_
)
3963 my_size
= this->min_size_threshold_
;
3964 this->reset_address_and_file_offset();
3965 this->set_current_data_size(my_size
);
3966 this->set_address_and_file_offset(os
->address() + start_off
,
3967 os
->offset() + start_off
);
3972 stub_address() const
3974 return align_address(this->address() + this->orig_data_size_
,
3975 this->stub_align());
3981 return align_address(this->offset() + this->orig_data_size_
,
3982 this->stub_align());
3987 { return this->plt_size_
; }
3989 void set_min_size_threshold(Address min_size
)
3990 { this->min_size_threshold_
= min_size
; }
3995 Output_section
* os
= this->output_section();
3996 if (os
->addralign() < this->stub_align())
3998 os
->set_addralign(this->stub_align());
3999 // FIXME: get rid of the insane checkpointing.
4000 // We can't increase alignment of the input section to which
4001 // stubs are attached; The input section may be .init which
4002 // is pasted together with other .init sections to form a
4003 // function. Aligning might insert zero padding resulting in
4004 // sigill. However we do need to increase alignment of the
4005 // output section so that the align_address() on offset in
4006 // set_address_and_size() adds the same padding as the
4007 // align_address() on address in stub_address().
4008 // What's more, we need this alignment for the layout done in
4009 // relaxation_loop_body() so that the output section starts at
4010 // a suitably aligned address.
4011 os
->checkpoint_set_addralign(this->stub_align());
4013 if (this->last_plt_size_
!= this->plt_size_
4014 || this->last_branch_size_
!= this->branch_size_
)
4016 this->last_plt_size_
= this->plt_size_
;
4017 this->last_branch_size_
= this->branch_size_
;
4023 // Add .eh_frame info for this stub section. Unlike other linker
4024 // generated .eh_frame this is added late in the link, because we
4025 // only want the .eh_frame info if this particular stub section is
4028 add_eh_frame(Layout
* layout
)
4030 if (!this->eh_frame_added_
)
4032 if (!parameters
->options().ld_generated_unwind_info())
4035 // Since we add stub .eh_frame info late, it must be placed
4036 // after all other linker generated .eh_frame info so that
4037 // merge mapping need not be updated for input sections.
4038 // There is no provision to use a different CIE to that used
4040 if (!this->targ_
->has_glink())
4043 layout
->add_eh_frame_for_plt(this,
4044 Eh_cie
<size
>::eh_frame_cie
,
4045 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4047 sizeof (default_fde
));
4048 this->eh_frame_added_
= true;
4052 Target_powerpc
<size
, big_endian
>*
4058 class Plt_stub_ent_hash
;
4059 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
4060 Plt_stub_ent_hash
> Plt_stub_entries
;
4062 // Alignment of stub section.
4068 unsigned int min_align
= 32;
4069 unsigned int user_align
= 1 << parameters
->options().plt_align();
4070 return std::max(user_align
, min_align
);
4073 // Return the plt offset for the given call stub.
4075 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4077 const Symbol
* gsym
= p
->first
.sym_
;
4080 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4081 && gsym
->can_use_relative_reloc(false));
4082 return gsym
->plt_offset();
4087 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4088 unsigned int local_sym_index
= p
->first
.locsym_
;
4089 return relobj
->local_plt_offset(local_sym_index
);
4093 // Size of a given plt call stub.
4095 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4101 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4103 plt_addr
+= this->targ_
->iplt_section()->address();
4105 plt_addr
+= this->targ_
->plt_section()->address();
4106 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4107 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4108 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4109 got_addr
+= ppcobj
->toc_base_offset();
4110 Address off
= plt_addr
- got_addr
;
4111 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4112 if (this->targ_
->abiversion() < 2)
4114 bool static_chain
= parameters
->options().plt_static_chain();
4115 bool thread_safe
= this->targ_
->plt_thread_safe();
4119 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4121 unsigned int align
= 1 << parameters
->options().plt_align();
4123 bytes
= (bytes
+ align
- 1) & -align
;
4127 // Return long branch stub size.
4129 branch_stub_size(Address to
)
4132 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
4133 if (to
- loc
+ (1 << 25) < 2 << 25)
4135 if (size
== 64 || !parameters
->options().output_is_position_independent())
4142 do_write(Output_file
*);
4144 // Plt call stub keys.
4148 Plt_stub_ent(const Symbol
* sym
)
4149 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4152 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4153 unsigned int locsym_index
)
4154 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4157 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4159 unsigned int r_type
,
4161 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4164 this->addend_
= addend
;
4165 else if (parameters
->options().output_is_position_independent()
4166 && r_type
== elfcpp::R_PPC_PLTREL24
)
4168 this->addend_
= addend
;
4169 if (this->addend_
>= 32768)
4170 this->object_
= object
;
4174 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4175 unsigned int locsym_index
,
4176 unsigned int r_type
,
4178 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4181 this->addend_
= addend
;
4182 else if (parameters
->options().output_is_position_independent()
4183 && r_type
== elfcpp::R_PPC_PLTREL24
)
4184 this->addend_
= addend
;
4187 bool operator==(const Plt_stub_ent
& that
) const
4189 return (this->sym_
== that
.sym_
4190 && this->object_
== that
.object_
4191 && this->addend_
== that
.addend_
4192 && this->locsym_
== that
.locsym_
);
4196 const Sized_relobj_file
<size
, big_endian
>* object_
;
4197 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4198 unsigned int locsym_
;
4201 class Plt_stub_ent_hash
4204 size_t operator()(const Plt_stub_ent
& ent
) const
4206 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4207 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4213 // Long branch stub keys.
4214 class Branch_stub_ent
4217 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4218 Address to
, bool save_res
)
4219 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4222 toc_base_off_
= obj
->toc_base_offset();
4225 bool operator==(const Branch_stub_ent
& that
) const
4227 return (this->dest_
== that
.dest_
4229 || this->toc_base_off_
== that
.toc_base_off_
));
4233 unsigned int toc_base_off_
;
4237 class Branch_stub_ent_hash
4240 size_t operator()(const Branch_stub_ent
& ent
) const
4241 { return ent
.dest_
^ ent
.toc_base_off_
; }
4244 // In a sane world this would be a global.
4245 Target_powerpc
<size
, big_endian
>* targ_
;
4246 // Map sym/object/addend to stub offset.
4247 Plt_stub_entries plt_call_stubs_
;
4248 // Map destination address to stub offset.
4249 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4250 Branch_stub_ent_hash
> Branch_stub_entries
;
4251 Branch_stub_entries long_branch_stubs_
;
4252 // size of input section
4253 section_size_type orig_data_size_
;
4255 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4256 // Some rare cases cause (PR/20529) fluctuation in stub table
4257 // size, which leads to an endless relax loop. This is to be fixed
4258 // by, after the first few iterations, allowing only increase of
4259 // stub table size. This variable sets the minimal possible size of
4260 // a stub table, it is zero for the first few iterations, then
4261 // increases monotonically.
4262 Address min_size_threshold_
;
4263 // Whether .eh_frame info has been created for this stub section.
4264 bool eh_frame_added_
;
4265 // Set if this stub group needs a copy of out-of-line register
4266 // save/restore functions.
4267 bool need_save_res_
;
4270 // Add a plt call stub, if we do not already have one for this
4271 // sym/object/addend combo.
4273 template<int size
, bool big_endian
>
4275 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4277 const Sized_relobj_file
<size
, big_endian
>* object
,
4279 unsigned int r_type
,
4282 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4283 unsigned int off
= this->plt_size_
;
4284 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4285 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4287 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4288 return this->can_reach_stub(from
, off
, r_type
);
4291 template<int size
, bool big_endian
>
4293 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4295 const Sized_relobj_file
<size
, big_endian
>* object
,
4296 unsigned int locsym_index
,
4297 unsigned int r_type
,
4300 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4301 unsigned int off
= this->plt_size_
;
4302 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4303 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4305 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4306 return this->can_reach_stub(from
, off
, r_type
);
4309 // Find a plt call stub.
4311 template<int size
, bool big_endian
>
4312 typename Stub_table
<size
, big_endian
>::Address
4313 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4314 const Sized_relobj_file
<size
, big_endian
>* object
,
4316 unsigned int r_type
,
4317 Address addend
) const
4319 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4320 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4321 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4324 template<int size
, bool big_endian
>
4325 typename Stub_table
<size
, big_endian
>::Address
4326 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4328 Plt_stub_ent
ent(gsym
);
4329 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4330 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4333 template<int size
, bool big_endian
>
4334 typename Stub_table
<size
, big_endian
>::Address
4335 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4336 const Sized_relobj_file
<size
, big_endian
>* object
,
4337 unsigned int locsym_index
,
4338 unsigned int r_type
,
4339 Address addend
) const
4341 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4342 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4343 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4346 template<int size
, bool big_endian
>
4347 typename Stub_table
<size
, big_endian
>::Address
4348 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4349 const Sized_relobj_file
<size
, big_endian
>* object
,
4350 unsigned int locsym_index
) const
4352 Plt_stub_ent
ent(object
, locsym_index
);
4353 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4354 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4357 // Add a long branch stub if we don't already have one to given
4360 template<int size
, bool big_endian
>
4362 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4363 const Powerpc_relobj
<size
, big_endian
>* object
,
4364 unsigned int r_type
,
4369 Branch_stub_ent
ent(object
, to
, save_res
);
4370 Address off
= this->branch_size_
;
4371 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4374 this->need_save_res_
= true;
4377 unsigned int stub_size
= this->branch_stub_size(to
);
4378 this->branch_size_
= off
+ stub_size
;
4379 if (size
== 64 && stub_size
!= 4)
4380 this->targ_
->add_branch_lookup_table(to
);
4383 return this->can_reach_stub(from
, off
, r_type
);
4386 // Find long branch stub offset.
4388 template<int size
, bool big_endian
>
4389 typename Stub_table
<size
, big_endian
>::Address
4390 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4391 const Powerpc_relobj
<size
, big_endian
>* object
,
4394 Branch_stub_ent
ent(object
, to
, false);
4395 typename
Branch_stub_entries::const_iterator p
4396 = this->long_branch_stubs_
.find(ent
);
4397 if (p
== this->long_branch_stubs_
.end())
4398 return invalid_address
;
4399 if (p
->first
.save_res_
)
4400 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4404 // A class to handle .glink.
4406 template<int size
, bool big_endian
>
4407 class Output_data_glink
: public Output_section_data
4410 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4411 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4412 static const int pltresolve_size
= 16*4;
4414 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4415 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4416 end_branch_table_(), ge_size_(0)
4420 add_eh_frame(Layout
* layout
);
4423 add_global_entry(const Symbol
*);
4426 find_global_entry(const Symbol
*) const;
4429 global_entry_address() const
4431 gold_assert(this->is_data_size_valid());
4432 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4433 return this->address() + global_entry_off
;
4437 // Write to a map file.
4439 do_print_to_mapfile(Mapfile
* mapfile
) const
4440 { mapfile
->print_output_data(this, _("** glink")); }
4444 set_final_data_size();
4448 do_write(Output_file
*);
4450 // Allows access to .got and .plt for do_write.
4451 Target_powerpc
<size
, big_endian
>* targ_
;
4453 // Map sym to stub offset.
4454 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4455 Global_entry_stub_entries global_entry_stubs_
;
4457 unsigned int end_branch_table_
, ge_size_
;
4460 template<int size
, bool big_endian
>
4462 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4464 if (!parameters
->options().ld_generated_unwind_info())
4469 if (this->targ_
->abiversion() < 2)
4470 layout
->add_eh_frame_for_plt(this,
4471 Eh_cie
<64>::eh_frame_cie
,
4472 sizeof (Eh_cie
<64>::eh_frame_cie
),
4473 glink_eh_frame_fde_64v1
,
4474 sizeof (glink_eh_frame_fde_64v1
));
4476 layout
->add_eh_frame_for_plt(this,
4477 Eh_cie
<64>::eh_frame_cie
,
4478 sizeof (Eh_cie
<64>::eh_frame_cie
),
4479 glink_eh_frame_fde_64v2
,
4480 sizeof (glink_eh_frame_fde_64v2
));
4484 // 32-bit .glink can use the default since the CIE return
4485 // address reg, LR, is valid.
4486 layout
->add_eh_frame_for_plt(this,
4487 Eh_cie
<32>::eh_frame_cie
,
4488 sizeof (Eh_cie
<32>::eh_frame_cie
),
4490 sizeof (default_fde
));
4491 // Except where LR is used in a PIC __glink_PLTresolve.
4492 if (parameters
->options().output_is_position_independent())
4493 layout
->add_eh_frame_for_plt(this,
4494 Eh_cie
<32>::eh_frame_cie
,
4495 sizeof (Eh_cie
<32>::eh_frame_cie
),
4496 glink_eh_frame_fde_32
,
4497 sizeof (glink_eh_frame_fde_32
));
4501 template<int size
, bool big_endian
>
4503 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4505 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4506 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4508 this->ge_size_
+= 16;
4511 template<int size
, bool big_endian
>
4512 typename Output_data_glink
<size
, big_endian
>::Address
4513 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4515 typename
Global_entry_stub_entries::const_iterator p
4516 = this->global_entry_stubs_
.find(gsym
);
4517 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4520 template<int size
, bool big_endian
>
4522 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4524 unsigned int count
= this->targ_
->plt_entry_count();
4525 section_size_type total
= 0;
4531 // space for branch table
4532 total
+= 4 * (count
- 1);
4534 total
+= -total
& 15;
4535 total
+= this->pltresolve_size
;
4539 total
+= this->pltresolve_size
;
4541 // space for branch table
4543 if (this->targ_
->abiversion() < 2)
4547 total
+= 4 * (count
- 0x8000);
4551 this->end_branch_table_
= total
;
4552 total
= (total
+ 15) & -16;
4553 total
+= this->ge_size_
;
4555 this->set_data_size(total
);
4558 // Write out plt and long branch stub code.
4560 template<int size
, bool big_endian
>
4562 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4564 if (this->plt_call_stubs_
.empty()
4565 && this->long_branch_stubs_
.empty())
4568 const section_size_type start_off
= this->offset();
4569 const section_size_type off
= this->stub_offset();
4570 const section_size_type oview_size
=
4571 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4572 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4577 const Output_data_got_powerpc
<size
, big_endian
>* got
4578 = this->targ_
->got_section();
4579 Address got_os_addr
= got
->output_section()->address();
4581 if (!this->plt_call_stubs_
.empty())
4583 // The base address of the .plt section.
4584 Address plt_base
= this->targ_
->plt_section()->address();
4585 Address iplt_base
= invalid_address
;
4587 // Write out plt call stubs.
4588 typename
Plt_stub_entries::const_iterator cs
;
4589 for (cs
= this->plt_call_stubs_
.begin();
4590 cs
!= this->plt_call_stubs_
.end();
4594 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4595 Address plt_addr
= pltoff
;
4598 if (iplt_base
== invalid_address
)
4599 iplt_base
= this->targ_
->iplt_section()->address();
4600 plt_addr
+= iplt_base
;
4603 plt_addr
+= plt_base
;
4604 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4605 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4606 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4607 Address off
= plt_addr
- got_addr
;
4609 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4610 gold_error(_("%s: linkage table error against `%s'"),
4611 cs
->first
.object_
->name().c_str(),
4612 cs
->first
.sym_
->demangled_name().c_str());
4614 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4616 = plt_load_toc
&& parameters
->options().plt_static_chain();
4618 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4619 bool use_fake_dep
= false;
4620 Address cmp_branch_off
= 0;
4623 unsigned int pltindex
4624 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4625 / this->targ_
->plt_entry_size());
4627 = (this->targ_
->glink_section()->pltresolve_size
4629 if (pltindex
> 32768)
4630 glinkoff
+= (pltindex
- 32768) * 4;
4632 = this->targ_
->glink_section()->address() + glinkoff
;
4634 = (this->stub_address() + cs
->second
+ 24
4635 + 4 * (ha(off
) != 0)
4636 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4637 + 4 * static_chain
);
4638 cmp_branch_off
= to
- from
;
4639 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4642 p
= oview
+ cs
->second
;
4645 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4649 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4651 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4656 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4658 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4662 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4664 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4668 write_insn
<big_endian
>(p
, mtctr_12
);
4674 write_insn
<big_endian
>(p
, xor_2_12_12
);
4676 write_insn
<big_endian
>(p
, add_11_11_2
);
4679 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4683 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4690 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4692 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4695 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4697 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4701 write_insn
<big_endian
>(p
, mtctr_12
);
4707 write_insn
<big_endian
>(p
, xor_11_12_12
);
4709 write_insn
<big_endian
>(p
, add_2_2_11
);
4714 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4717 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4721 if (thread_safe
&& !use_fake_dep
)
4723 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4725 write_insn
<big_endian
>(p
, bnectr_p4
);
4727 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4730 write_insn
<big_endian
>(p
, bctr
);
4734 // Write out long branch stubs.
4735 typename
Branch_stub_entries::const_iterator bs
;
4736 for (bs
= this->long_branch_stubs_
.begin();
4737 bs
!= this->long_branch_stubs_
.end();
4740 if (bs
->first
.save_res_
)
4742 p
= oview
+ this->plt_size_
+ bs
->second
;
4743 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4744 Address delta
= bs
->first
.dest_
- loc
;
4745 if (delta
+ (1 << 25) < 2 << 25)
4746 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4750 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4751 gold_assert(brlt_addr
!= invalid_address
);
4752 brlt_addr
+= this->targ_
->brlt_section()->address();
4753 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4754 Address brltoff
= brlt_addr
- got_addr
;
4755 if (ha(brltoff
) == 0)
4757 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4761 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4762 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4764 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4765 write_insn
<big_endian
>(p
, bctr
);
4771 if (!this->plt_call_stubs_
.empty())
4773 // The base address of the .plt section.
4774 Address plt_base
= this->targ_
->plt_section()->address();
4775 Address iplt_base
= invalid_address
;
4776 // The address of _GLOBAL_OFFSET_TABLE_.
4777 Address g_o_t
= invalid_address
;
4779 // Write out plt call stubs.
4780 typename
Plt_stub_entries::const_iterator cs
;
4781 for (cs
= this->plt_call_stubs_
.begin();
4782 cs
!= this->plt_call_stubs_
.end();
4786 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4789 if (iplt_base
== invalid_address
)
4790 iplt_base
= this->targ_
->iplt_section()->address();
4791 plt_addr
+= iplt_base
;
4794 plt_addr
+= plt_base
;
4796 p
= oview
+ cs
->second
;
4797 if (parameters
->options().output_is_position_independent())
4800 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4801 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4802 (cs
->first
.object_
));
4803 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4805 unsigned int got2
= ppcobj
->got2_shndx();
4806 got_addr
= ppcobj
->get_output_section_offset(got2
);
4807 gold_assert(got_addr
!= invalid_address
);
4808 got_addr
+= (ppcobj
->output_section(got2
)->address()
4809 + cs
->first
.addend_
);
4813 if (g_o_t
== invalid_address
)
4815 const Output_data_got_powerpc
<size
, big_endian
>* got
4816 = this->targ_
->got_section();
4817 g_o_t
= got
->address() + got
->g_o_t();
4822 Address off
= plt_addr
- got_addr
;
4825 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4826 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4827 write_insn
<big_endian
>(p
+ 8, bctr
);
4831 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4832 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4833 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4834 write_insn
<big_endian
>(p
+ 12, bctr
);
4839 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4840 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4841 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4842 write_insn
<big_endian
>(p
+ 12, bctr
);
4847 // Write out long branch stubs.
4848 typename
Branch_stub_entries::const_iterator bs
;
4849 for (bs
= this->long_branch_stubs_
.begin();
4850 bs
!= this->long_branch_stubs_
.end();
4853 if (bs
->first
.save_res_
)
4855 p
= oview
+ this->plt_size_
+ bs
->second
;
4856 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4857 Address delta
= bs
->first
.dest_
- loc
;
4858 if (delta
+ (1 << 25) < 2 << 25)
4859 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4860 else if (!parameters
->options().output_is_position_independent())
4862 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4863 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4864 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4865 write_insn
<big_endian
>(p
+ 12, bctr
);
4870 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4871 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4872 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4873 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4874 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4875 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4876 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4877 write_insn
<big_endian
>(p
+ 28, bctr
);
4881 if (this->need_save_res_
)
4883 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4884 memcpy (p
, this->targ_
->savres_section()->contents(),
4885 this->targ_
->savres_section()->data_size());
4889 // Write out .glink.
4891 template<int size
, bool big_endian
>
4893 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4895 const section_size_type off
= this->offset();
4896 const section_size_type oview_size
=
4897 convert_to_section_size_type(this->data_size());
4898 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4901 // The base address of the .plt section.
4902 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4903 Address plt_base
= this->targ_
->plt_section()->address();
4907 if (this->end_branch_table_
!= 0)
4909 // Write pltresolve stub.
4911 Address after_bcl
= this->address() + 16;
4912 Address pltoff
= plt_base
- after_bcl
;
4914 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4916 if (this->targ_
->abiversion() < 2)
4918 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4919 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4920 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4921 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4922 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4923 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4924 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4925 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4926 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4927 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4931 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4932 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4933 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4934 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4935 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4936 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4937 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4938 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4939 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4940 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4941 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4942 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4944 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4945 while (p
< oview
+ this->pltresolve_size
)
4946 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4948 // Write lazy link call stubs.
4950 while (p
< oview
+ this->end_branch_table_
)
4952 if (this->targ_
->abiversion() < 2)
4956 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4960 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4961 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4964 uint32_t branch_off
= 8 - (p
- oview
);
4965 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4970 Address plt_base
= this->targ_
->plt_section()->address();
4971 Address iplt_base
= invalid_address
;
4972 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4973 Address global_entry_base
= this->address() + global_entry_off
;
4974 typename
Global_entry_stub_entries::const_iterator ge
;
4975 for (ge
= this->global_entry_stubs_
.begin();
4976 ge
!= this->global_entry_stubs_
.end();
4979 p
= oview
+ global_entry_off
+ ge
->second
;
4980 Address plt_addr
= ge
->first
->plt_offset();
4981 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4982 && ge
->first
->can_use_relative_reloc(false))
4984 if (iplt_base
== invalid_address
)
4985 iplt_base
= this->targ_
->iplt_section()->address();
4986 plt_addr
+= iplt_base
;
4989 plt_addr
+= plt_base
;
4990 Address my_addr
= global_entry_base
+ ge
->second
;
4991 Address off
= plt_addr
- my_addr
;
4993 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4994 gold_error(_("%s: linkage table error against `%s'"),
4995 ge
->first
->object()->name().c_str(),
4996 ge
->first
->demangled_name().c_str());
4998 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4999 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5000 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5001 write_insn
<big_endian
>(p
, bctr
);
5006 const Output_data_got_powerpc
<size
, big_endian
>* got
5007 = this->targ_
->got_section();
5008 // The address of _GLOBAL_OFFSET_TABLE_.
5009 Address g_o_t
= got
->address() + got
->g_o_t();
5011 // Write out pltresolve branch table.
5013 unsigned int the_end
= oview_size
- this->pltresolve_size
;
5014 unsigned char* end_p
= oview
+ the_end
;
5015 while (p
< end_p
- 8 * 4)
5016 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5018 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5020 // Write out pltresolve call stub.
5021 if (parameters
->options().output_is_position_independent())
5023 Address res0_off
= 0;
5024 Address after_bcl_off
= the_end
+ 12;
5025 Address bcl_res0
= after_bcl_off
- res0_off
;
5027 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
5028 write_insn
<big_endian
>(p
+ 4, mflr_0
);
5029 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
5030 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
5031 write_insn
<big_endian
>(p
+ 16, mflr_12
);
5032 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5033 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
5035 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5037 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
5038 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5040 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
5041 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
5045 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
5046 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
5048 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
5049 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
5050 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
5051 write_insn
<big_endian
>(p
+ 52, bctr
);
5052 write_insn
<big_endian
>(p
+ 56, nop
);
5053 write_insn
<big_endian
>(p
+ 60, nop
);
5057 Address res0
= this->address();
5059 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
5060 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
5061 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5062 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
5064 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
5065 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
5066 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
5067 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
5068 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5069 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
5071 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
5072 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
5073 write_insn
<big_endian
>(p
+ 32, bctr
);
5074 write_insn
<big_endian
>(p
+ 36, nop
);
5075 write_insn
<big_endian
>(p
+ 40, nop
);
5076 write_insn
<big_endian
>(p
+ 44, nop
);
5077 write_insn
<big_endian
>(p
+ 48, nop
);
5078 write_insn
<big_endian
>(p
+ 52, nop
);
5079 write_insn
<big_endian
>(p
+ 56, nop
);
5080 write_insn
<big_endian
>(p
+ 60, nop
);
5085 of
->write_output_view(off
, oview_size
, oview
);
5089 // A class to handle linker generated save/restore functions.
5091 template<int size
, bool big_endian
>
5092 class Output_data_save_res
: public Output_section_data_build
5095 Output_data_save_res(Symbol_table
* symtab
);
5097 const unsigned char*
5104 // Write to a map file.
5106 do_print_to_mapfile(Mapfile
* mapfile
) const
5107 { mapfile
->print_output_data(this, _("** save/restore")); }
5110 do_write(Output_file
*);
5113 // The maximum size of save/restore contents.
5114 static const unsigned int savres_max
= 218*4;
5117 savres_define(Symbol_table
* symtab
,
5119 unsigned int lo
, unsigned int hi
,
5120 unsigned char* write_ent(unsigned char*, int),
5121 unsigned char* write_tail(unsigned char*, int));
5123 unsigned char *contents_
;
5126 template<bool big_endian
>
5127 static unsigned char*
5128 savegpr0(unsigned char* p
, int r
)
5130 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5131 write_insn
<big_endian
>(p
, insn
);
5135 template<bool big_endian
>
5136 static unsigned char*
5137 savegpr0_tail(unsigned char* p
, int r
)
5139 p
= savegpr0
<big_endian
>(p
, r
);
5140 uint32_t insn
= std_0_1
+ 16;
5141 write_insn
<big_endian
>(p
, insn
);
5143 write_insn
<big_endian
>(p
, blr
);
5147 template<bool big_endian
>
5148 static unsigned char*
5149 restgpr0(unsigned char* p
, int r
)
5151 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5152 write_insn
<big_endian
>(p
, insn
);
5156 template<bool big_endian
>
5157 static unsigned char*
5158 restgpr0_tail(unsigned char* p
, int r
)
5160 uint32_t insn
= ld_0_1
+ 16;
5161 write_insn
<big_endian
>(p
, insn
);
5163 p
= restgpr0
<big_endian
>(p
, r
);
5164 write_insn
<big_endian
>(p
, mtlr_0
);
5168 p
= restgpr0
<big_endian
>(p
, 30);
5169 p
= restgpr0
<big_endian
>(p
, 31);
5171 write_insn
<big_endian
>(p
, blr
);
5175 template<bool big_endian
>
5176 static unsigned char*
5177 savegpr1(unsigned char* p
, int r
)
5179 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5180 write_insn
<big_endian
>(p
, insn
);
5184 template<bool big_endian
>
5185 static unsigned char*
5186 savegpr1_tail(unsigned char* p
, int r
)
5188 p
= savegpr1
<big_endian
>(p
, r
);
5189 write_insn
<big_endian
>(p
, blr
);
5193 template<bool big_endian
>
5194 static unsigned char*
5195 restgpr1(unsigned char* p
, int r
)
5197 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5198 write_insn
<big_endian
>(p
, insn
);
5202 template<bool big_endian
>
5203 static unsigned char*
5204 restgpr1_tail(unsigned char* p
, int r
)
5206 p
= restgpr1
<big_endian
>(p
, r
);
5207 write_insn
<big_endian
>(p
, blr
);
5211 template<bool big_endian
>
5212 static unsigned char*
5213 savefpr(unsigned char* p
, int r
)
5215 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5216 write_insn
<big_endian
>(p
, insn
);
5220 template<bool big_endian
>
5221 static unsigned char*
5222 savefpr0_tail(unsigned char* p
, int r
)
5224 p
= savefpr
<big_endian
>(p
, r
);
5225 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5227 write_insn
<big_endian
>(p
, blr
);
5231 template<bool big_endian
>
5232 static unsigned char*
5233 restfpr(unsigned char* p
, int r
)
5235 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5236 write_insn
<big_endian
>(p
, insn
);
5240 template<bool big_endian
>
5241 static unsigned char*
5242 restfpr0_tail(unsigned char* p
, int r
)
5244 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5246 p
= restfpr
<big_endian
>(p
, r
);
5247 write_insn
<big_endian
>(p
, mtlr_0
);
5251 p
= restfpr
<big_endian
>(p
, 30);
5252 p
= restfpr
<big_endian
>(p
, 31);
5254 write_insn
<big_endian
>(p
, blr
);
5258 template<bool big_endian
>
5259 static unsigned char*
5260 savefpr1_tail(unsigned char* p
, int r
)
5262 p
= savefpr
<big_endian
>(p
, r
);
5263 write_insn
<big_endian
>(p
, blr
);
5267 template<bool big_endian
>
5268 static unsigned char*
5269 restfpr1_tail(unsigned char* p
, int r
)
5271 p
= restfpr
<big_endian
>(p
, r
);
5272 write_insn
<big_endian
>(p
, blr
);
5276 template<bool big_endian
>
5277 static unsigned char*
5278 savevr(unsigned char* p
, int r
)
5280 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5281 write_insn
<big_endian
>(p
, insn
);
5283 insn
= stvx_0_12_0
+ (r
<< 21);
5284 write_insn
<big_endian
>(p
, insn
);
5288 template<bool big_endian
>
5289 static unsigned char*
5290 savevr_tail(unsigned char* p
, int r
)
5292 p
= savevr
<big_endian
>(p
, r
);
5293 write_insn
<big_endian
>(p
, blr
);
5297 template<bool big_endian
>
5298 static unsigned char*
5299 restvr(unsigned char* p
, int r
)
5301 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5302 write_insn
<big_endian
>(p
, insn
);
5304 insn
= lvx_0_12_0
+ (r
<< 21);
5305 write_insn
<big_endian
>(p
, insn
);
5309 template<bool big_endian
>
5310 static unsigned char*
5311 restvr_tail(unsigned char* p
, int r
)
5313 p
= restvr
<big_endian
>(p
, r
);
5314 write_insn
<big_endian
>(p
, blr
);
5319 template<int size
, bool big_endian
>
5320 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5321 Symbol_table
* symtab
)
5322 : Output_section_data_build(4),
5325 this->savres_define(symtab
,
5326 "_savegpr0_", 14, 31,
5327 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5328 this->savres_define(symtab
,
5329 "_restgpr0_", 14, 29,
5330 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5331 this->savres_define(symtab
,
5332 "_restgpr0_", 30, 31,
5333 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5334 this->savres_define(symtab
,
5335 "_savegpr1_", 14, 31,
5336 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5337 this->savres_define(symtab
,
5338 "_restgpr1_", 14, 31,
5339 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5340 this->savres_define(symtab
,
5341 "_savefpr_", 14, 31,
5342 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5343 this->savres_define(symtab
,
5344 "_restfpr_", 14, 29,
5345 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5346 this->savres_define(symtab
,
5347 "_restfpr_", 30, 31,
5348 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5349 this->savres_define(symtab
,
5351 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5352 this->savres_define(symtab
,
5354 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5355 this->savres_define(symtab
,
5357 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5358 this->savres_define(symtab
,
5360 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5363 template<int size
, bool big_endian
>
5365 Output_data_save_res
<size
, big_endian
>::savres_define(
5366 Symbol_table
* symtab
,
5368 unsigned int lo
, unsigned int hi
,
5369 unsigned char* write_ent(unsigned char*, int),
5370 unsigned char* write_tail(unsigned char*, int))
5372 size_t len
= strlen(name
);
5373 bool writing
= false;
5376 memcpy(sym
, name
, len
);
5379 for (unsigned int i
= lo
; i
<= hi
; i
++)
5381 sym
[len
+ 0] = i
/ 10 + '0';
5382 sym
[len
+ 1] = i
% 10 + '0';
5383 Symbol
* gsym
= symtab
->lookup(sym
);
5384 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5385 writing
= writing
|| refd
;
5388 if (this->contents_
== NULL
)
5389 this->contents_
= new unsigned char[this->savres_max
];
5391 section_size_type value
= this->current_data_size();
5392 unsigned char* p
= this->contents_
+ value
;
5394 p
= write_ent(p
, i
);
5396 p
= write_tail(p
, i
);
5397 section_size_type cur_size
= p
- this->contents_
;
5398 this->set_current_data_size(cur_size
);
5400 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5401 this, value
, cur_size
- value
,
5402 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5403 elfcpp::STV_HIDDEN
, 0, false, false);
5408 // Write out save/restore.
5410 template<int size
, bool big_endian
>
5412 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5414 const section_size_type off
= this->offset();
5415 const section_size_type oview_size
=
5416 convert_to_section_size_type(this->data_size());
5417 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5418 memcpy(oview
, this->contents_
, oview_size
);
5419 of
->write_output_view(off
, oview_size
, oview
);
5423 // Create the glink section.
5425 template<int size
, bool big_endian
>
5427 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5429 if (this->glink_
== NULL
)
5431 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5432 this->glink_
->add_eh_frame(layout
);
5433 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5434 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5435 this->glink_
, ORDER_TEXT
, false);
5439 // Create a PLT entry for a global symbol.
5441 template<int size
, bool big_endian
>
5443 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5447 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5448 && gsym
->can_use_relative_reloc(false))
5450 if (this->iplt_
== NULL
)
5451 this->make_iplt_section(symtab
, layout
);
5452 this->iplt_
->add_ifunc_entry(gsym
);
5456 if (this->plt_
== NULL
)
5457 this->make_plt_section(symtab
, layout
);
5458 this->plt_
->add_entry(gsym
);
5462 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5464 template<int size
, bool big_endian
>
5466 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5467 Symbol_table
* symtab
,
5469 Sized_relobj_file
<size
, big_endian
>* relobj
,
5472 if (this->iplt_
== NULL
)
5473 this->make_iplt_section(symtab
, layout
);
5474 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5477 // Return the number of entries in the PLT.
5479 template<int size
, bool big_endian
>
5481 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5483 if (this->plt_
== NULL
)
5485 return this->plt_
->entry_count();
5488 // Create a GOT entry for local dynamic __tls_get_addr calls.
5490 template<int size
, bool big_endian
>
5492 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5493 Symbol_table
* symtab
,
5495 Sized_relobj_file
<size
, big_endian
>* object
)
5497 if (this->tlsld_got_offset_
== -1U)
5499 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5500 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5501 Output_data_got_powerpc
<size
, big_endian
>* got
5502 = this->got_section(symtab
, layout
);
5503 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5504 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5506 this->tlsld_got_offset_
= got_offset
;
5508 return this->tlsld_got_offset_
;
5511 // Get the Reference_flags for a particular relocation.
5513 template<int size
, bool big_endian
>
5515 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5516 unsigned int r_type
,
5517 const Target_powerpc
* target
)
5523 case elfcpp::R_POWERPC_NONE
:
5524 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5525 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5526 case elfcpp::R_PPC64_TOC
:
5527 // No symbol reference.
5530 case elfcpp::R_PPC64_ADDR64
:
5531 case elfcpp::R_PPC64_UADDR64
:
5532 case elfcpp::R_POWERPC_ADDR32
:
5533 case elfcpp::R_POWERPC_UADDR32
:
5534 case elfcpp::R_POWERPC_ADDR16
:
5535 case elfcpp::R_POWERPC_UADDR16
:
5536 case elfcpp::R_POWERPC_ADDR16_LO
:
5537 case elfcpp::R_POWERPC_ADDR16_HI
:
5538 case elfcpp::R_POWERPC_ADDR16_HA
:
5539 ref
= Symbol::ABSOLUTE_REF
;
5542 case elfcpp::R_POWERPC_ADDR24
:
5543 case elfcpp::R_POWERPC_ADDR14
:
5544 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5545 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5546 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5549 case elfcpp::R_PPC64_REL64
:
5550 case elfcpp::R_POWERPC_REL32
:
5551 case elfcpp::R_PPC_LOCAL24PC
:
5552 case elfcpp::R_POWERPC_REL16
:
5553 case elfcpp::R_POWERPC_REL16_LO
:
5554 case elfcpp::R_POWERPC_REL16_HI
:
5555 case elfcpp::R_POWERPC_REL16_HA
:
5556 ref
= Symbol::RELATIVE_REF
;
5559 case elfcpp::R_POWERPC_REL24
:
5560 case elfcpp::R_PPC_PLTREL24
:
5561 case elfcpp::R_POWERPC_REL14
:
5562 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5563 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5564 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5567 case elfcpp::R_POWERPC_GOT16
:
5568 case elfcpp::R_POWERPC_GOT16_LO
:
5569 case elfcpp::R_POWERPC_GOT16_HI
:
5570 case elfcpp::R_POWERPC_GOT16_HA
:
5571 case elfcpp::R_PPC64_GOT16_DS
:
5572 case elfcpp::R_PPC64_GOT16_LO_DS
:
5573 case elfcpp::R_PPC64_TOC16
:
5574 case elfcpp::R_PPC64_TOC16_LO
:
5575 case elfcpp::R_PPC64_TOC16_HI
:
5576 case elfcpp::R_PPC64_TOC16_HA
:
5577 case elfcpp::R_PPC64_TOC16_DS
:
5578 case elfcpp::R_PPC64_TOC16_LO_DS
:
5579 ref
= Symbol::RELATIVE_REF
;
5582 case elfcpp::R_POWERPC_GOT_TPREL16
:
5583 case elfcpp::R_POWERPC_TLS
:
5584 ref
= Symbol::TLS_REF
;
5587 case elfcpp::R_POWERPC_COPY
:
5588 case elfcpp::R_POWERPC_GLOB_DAT
:
5589 case elfcpp::R_POWERPC_JMP_SLOT
:
5590 case elfcpp::R_POWERPC_RELATIVE
:
5591 case elfcpp::R_POWERPC_DTPMOD
:
5593 // Not expected. We will give an error later.
5597 if (size
== 64 && target
->abiversion() < 2)
5598 ref
|= Symbol::FUNC_DESC_ABI
;
5602 // Report an unsupported relocation against a local symbol.
5604 template<int size
, bool big_endian
>
5606 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5607 Sized_relobj_file
<size
, big_endian
>* object
,
5608 unsigned int r_type
)
5610 gold_error(_("%s: unsupported reloc %u against local symbol"),
5611 object
->name().c_str(), r_type
);
5614 // We are about to emit a dynamic relocation of type R_TYPE. If the
5615 // dynamic linker does not support it, issue an error.
5617 template<int size
, bool big_endian
>
5619 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5620 unsigned int r_type
)
5622 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5624 // These are the relocation types supported by glibc for both 32-bit
5625 // and 64-bit powerpc.
5628 case elfcpp::R_POWERPC_NONE
:
5629 case elfcpp::R_POWERPC_RELATIVE
:
5630 case elfcpp::R_POWERPC_GLOB_DAT
:
5631 case elfcpp::R_POWERPC_DTPMOD
:
5632 case elfcpp::R_POWERPC_DTPREL
:
5633 case elfcpp::R_POWERPC_TPREL
:
5634 case elfcpp::R_POWERPC_JMP_SLOT
:
5635 case elfcpp::R_POWERPC_COPY
:
5636 case elfcpp::R_POWERPC_IRELATIVE
:
5637 case elfcpp::R_POWERPC_ADDR32
:
5638 case elfcpp::R_POWERPC_UADDR32
:
5639 case elfcpp::R_POWERPC_ADDR24
:
5640 case elfcpp::R_POWERPC_ADDR16
:
5641 case elfcpp::R_POWERPC_UADDR16
:
5642 case elfcpp::R_POWERPC_ADDR16_LO
:
5643 case elfcpp::R_POWERPC_ADDR16_HI
:
5644 case elfcpp::R_POWERPC_ADDR16_HA
:
5645 case elfcpp::R_POWERPC_ADDR14
:
5646 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5647 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5648 case elfcpp::R_POWERPC_REL32
:
5649 case elfcpp::R_POWERPC_REL24
:
5650 case elfcpp::R_POWERPC_TPREL16
:
5651 case elfcpp::R_POWERPC_TPREL16_LO
:
5652 case elfcpp::R_POWERPC_TPREL16_HI
:
5653 case elfcpp::R_POWERPC_TPREL16_HA
:
5664 // These are the relocation types supported only on 64-bit.
5665 case elfcpp::R_PPC64_ADDR64
:
5666 case elfcpp::R_PPC64_UADDR64
:
5667 case elfcpp::R_PPC64_JMP_IREL
:
5668 case elfcpp::R_PPC64_ADDR16_DS
:
5669 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5670 case elfcpp::R_PPC64_ADDR16_HIGH
:
5671 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5672 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5673 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5674 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5675 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5676 case elfcpp::R_PPC64_REL64
:
5677 case elfcpp::R_POWERPC_ADDR30
:
5678 case elfcpp::R_PPC64_TPREL16_DS
:
5679 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5680 case elfcpp::R_PPC64_TPREL16_HIGH
:
5681 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5682 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5683 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5684 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5685 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5696 // These are the relocation types supported only on 32-bit.
5697 // ??? glibc ld.so doesn't need to support these.
5698 case elfcpp::R_POWERPC_DTPREL16
:
5699 case elfcpp::R_POWERPC_DTPREL16_LO
:
5700 case elfcpp::R_POWERPC_DTPREL16_HI
:
5701 case elfcpp::R_POWERPC_DTPREL16_HA
:
5709 // This prevents us from issuing more than one error per reloc
5710 // section. But we can still wind up issuing more than one
5711 // error per object file.
5712 if (this->issued_non_pic_error_
)
5714 gold_assert(parameters
->options().output_is_position_independent());
5715 object
->error(_("requires unsupported dynamic reloc; "
5716 "recompile with -fPIC"));
5717 this->issued_non_pic_error_
= true;
5721 // Return whether we need to make a PLT entry for a relocation of the
5722 // given type against a STT_GNU_IFUNC symbol.
5724 template<int size
, bool big_endian
>
5726 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5727 Target_powerpc
<size
, big_endian
>* target
,
5728 Sized_relobj_file
<size
, big_endian
>* object
,
5729 unsigned int r_type
,
5732 // In non-pic code any reference will resolve to the plt call stub
5733 // for the ifunc symbol.
5734 if ((size
== 32 || target
->abiversion() >= 2)
5735 && !parameters
->options().output_is_position_independent())
5740 // Word size refs from data sections are OK, but don't need a PLT entry.
5741 case elfcpp::R_POWERPC_ADDR32
:
5742 case elfcpp::R_POWERPC_UADDR32
:
5747 case elfcpp::R_PPC64_ADDR64
:
5748 case elfcpp::R_PPC64_UADDR64
:
5753 // GOT refs are good, but also don't need a PLT entry.
5754 case elfcpp::R_POWERPC_GOT16
:
5755 case elfcpp::R_POWERPC_GOT16_LO
:
5756 case elfcpp::R_POWERPC_GOT16_HI
:
5757 case elfcpp::R_POWERPC_GOT16_HA
:
5758 case elfcpp::R_PPC64_GOT16_DS
:
5759 case elfcpp::R_PPC64_GOT16_LO_DS
:
5762 // Function calls are good, and these do need a PLT entry.
5763 case elfcpp::R_POWERPC_ADDR24
:
5764 case elfcpp::R_POWERPC_ADDR14
:
5765 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5766 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5767 case elfcpp::R_POWERPC_REL24
:
5768 case elfcpp::R_PPC_PLTREL24
:
5769 case elfcpp::R_POWERPC_REL14
:
5770 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5771 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5778 // Anything else is a problem.
5779 // If we are building a static executable, the libc startup function
5780 // responsible for applying indirect function relocations is going
5781 // to complain about the reloc type.
5782 // If we are building a dynamic executable, we will have a text
5783 // relocation. The dynamic loader will set the text segment
5784 // writable and non-executable to apply text relocations. So we'll
5785 // segfault when trying to run the indirection function to resolve
5788 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5789 object
->name().c_str(), r_type
);
5793 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5797 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
5799 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
5800 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
5801 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5802 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5803 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5804 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5805 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5806 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5807 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5808 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5809 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5810 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5811 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5812 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5813 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5814 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
5815 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
5816 /* Exclude lfqu by testing reloc. If relocs are ever
5817 defined for the reduced D field in psq_lu then those
5818 will need testing too. */
5819 && r_type
!= elfcpp::R_PPC64_TOC16_LO
5820 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
5821 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
5823 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
5824 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
5825 /* Exclude stfqu. psq_stu as above for psq_lu. */
5826 && r_type
!= elfcpp::R_PPC64_TOC16_LO
5827 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
5828 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
5829 && (insn
& 1) == 0));
5832 // Scan a relocation for a local symbol.
5834 template<int size
, bool big_endian
>
5836 Target_powerpc
<size
, big_endian
>::Scan::local(
5837 Symbol_table
* symtab
,
5839 Target_powerpc
<size
, big_endian
>* target
,
5840 Sized_relobj_file
<size
, big_endian
>* object
,
5841 unsigned int data_shndx
,
5842 Output_section
* output_section
,
5843 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5844 unsigned int r_type
,
5845 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5848 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5850 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5851 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5853 this->expect_tls_get_addr_call();
5854 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5855 if (tls_type
!= tls::TLSOPT_NONE
)
5856 this->skip_next_tls_get_addr_call();
5858 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5859 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5861 this->expect_tls_get_addr_call();
5862 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5863 if (tls_type
!= tls::TLSOPT_NONE
)
5864 this->skip_next_tls_get_addr_call();
5867 Powerpc_relobj
<size
, big_endian
>* ppc_object
5868 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5873 && data_shndx
== ppc_object
->opd_shndx()
5874 && r_type
== elfcpp::R_PPC64_ADDR64
)
5875 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5879 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5880 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5881 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5883 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5884 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5885 r_type
, r_sym
, reloc
.get_r_addend());
5886 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5891 case elfcpp::R_POWERPC_NONE
:
5892 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5893 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5894 case elfcpp::R_PPC64_TOCSAVE
:
5895 case elfcpp::R_POWERPC_TLS
:
5896 case elfcpp::R_PPC64_ENTRY
:
5899 case elfcpp::R_PPC64_TOC
:
5901 Output_data_got_powerpc
<size
, big_endian
>* got
5902 = target
->got_section(symtab
, layout
);
5903 if (parameters
->options().output_is_position_independent())
5905 Address off
= reloc
.get_r_offset();
5907 && target
->abiversion() < 2
5908 && data_shndx
== ppc_object
->opd_shndx()
5909 && ppc_object
->get_opd_discard(off
- 8))
5912 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5913 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5914 rela_dyn
->add_output_section_relative(got
->output_section(),
5915 elfcpp::R_POWERPC_RELATIVE
,
5917 object
, data_shndx
, off
,
5918 symobj
->toc_base_offset());
5923 case elfcpp::R_PPC64_ADDR64
:
5924 case elfcpp::R_PPC64_UADDR64
:
5925 case elfcpp::R_POWERPC_ADDR32
:
5926 case elfcpp::R_POWERPC_UADDR32
:
5927 case elfcpp::R_POWERPC_ADDR24
:
5928 case elfcpp::R_POWERPC_ADDR16
:
5929 case elfcpp::R_POWERPC_ADDR16_LO
:
5930 case elfcpp::R_POWERPC_ADDR16_HI
:
5931 case elfcpp::R_POWERPC_ADDR16_HA
:
5932 case elfcpp::R_POWERPC_UADDR16
:
5933 case elfcpp::R_PPC64_ADDR16_HIGH
:
5934 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5935 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5936 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5937 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5938 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5939 case elfcpp::R_PPC64_ADDR16_DS
:
5940 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5941 case elfcpp::R_POWERPC_ADDR14
:
5942 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5943 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5944 // If building a shared library (or a position-independent
5945 // executable), we need to create a dynamic relocation for
5947 if (parameters
->options().output_is_position_independent()
5948 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5950 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5952 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5953 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5954 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5956 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5957 : elfcpp::R_POWERPC_RELATIVE
);
5958 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5959 output_section
, data_shndx
,
5960 reloc
.get_r_offset(),
5961 reloc
.get_r_addend(), false);
5963 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5965 check_non_pic(object
, r_type
);
5966 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5967 data_shndx
, reloc
.get_r_offset(),
5968 reloc
.get_r_addend());
5972 gold_assert(lsym
.get_st_value() == 0);
5973 unsigned int shndx
= lsym
.get_st_shndx();
5975 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5978 object
->error(_("section symbol %u has bad shndx %u"),
5981 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5982 output_section
, data_shndx
,
5983 reloc
.get_r_offset());
5988 case elfcpp::R_POWERPC_REL24
:
5989 case elfcpp::R_PPC_PLTREL24
:
5990 case elfcpp::R_PPC_LOCAL24PC
:
5991 case elfcpp::R_POWERPC_REL14
:
5992 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5993 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5996 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5997 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5998 r_type
, r_sym
, reloc
.get_r_addend());
6002 case elfcpp::R_PPC64_REL64
:
6003 case elfcpp::R_POWERPC_REL32
:
6004 case elfcpp::R_POWERPC_REL16
:
6005 case elfcpp::R_POWERPC_REL16_LO
:
6006 case elfcpp::R_POWERPC_REL16_HI
:
6007 case elfcpp::R_POWERPC_REL16_HA
:
6008 case elfcpp::R_POWERPC_REL16DX_HA
:
6009 case elfcpp::R_POWERPC_SECTOFF
:
6010 case elfcpp::R_POWERPC_SECTOFF_LO
:
6011 case elfcpp::R_POWERPC_SECTOFF_HI
:
6012 case elfcpp::R_POWERPC_SECTOFF_HA
:
6013 case elfcpp::R_PPC64_SECTOFF_DS
:
6014 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6015 case elfcpp::R_POWERPC_TPREL16
:
6016 case elfcpp::R_POWERPC_TPREL16_LO
:
6017 case elfcpp::R_POWERPC_TPREL16_HI
:
6018 case elfcpp::R_POWERPC_TPREL16_HA
:
6019 case elfcpp::R_PPC64_TPREL16_DS
:
6020 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6021 case elfcpp::R_PPC64_TPREL16_HIGH
:
6022 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6023 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6024 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6025 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6026 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6027 case elfcpp::R_POWERPC_DTPREL16
:
6028 case elfcpp::R_POWERPC_DTPREL16_LO
:
6029 case elfcpp::R_POWERPC_DTPREL16_HI
:
6030 case elfcpp::R_POWERPC_DTPREL16_HA
:
6031 case elfcpp::R_PPC64_DTPREL16_DS
:
6032 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6033 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6034 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6035 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6036 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6037 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6038 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6039 case elfcpp::R_PPC64_TLSGD
:
6040 case elfcpp::R_PPC64_TLSLD
:
6041 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6044 case elfcpp::R_POWERPC_GOT16
:
6045 case elfcpp::R_POWERPC_GOT16_LO
:
6046 case elfcpp::R_POWERPC_GOT16_HI
:
6047 case elfcpp::R_POWERPC_GOT16_HA
:
6048 case elfcpp::R_PPC64_GOT16_DS
:
6049 case elfcpp::R_PPC64_GOT16_LO_DS
:
6051 // The symbol requires a GOT entry.
6052 Output_data_got_powerpc
<size
, big_endian
>* got
6053 = target
->got_section(symtab
, layout
);
6054 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6056 if (!parameters
->options().output_is_position_independent())
6059 && (size
== 32 || target
->abiversion() >= 2))
6060 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6062 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6064 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6066 // If we are generating a shared object or a pie, this
6067 // symbol's GOT entry will be set by a dynamic relocation.
6069 off
= got
->add_constant(0);
6070 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6072 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6074 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6075 : elfcpp::R_POWERPC_RELATIVE
);
6076 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6077 got
, off
, 0, false);
6082 case elfcpp::R_PPC64_TOC16
:
6083 case elfcpp::R_PPC64_TOC16_LO
:
6084 case elfcpp::R_PPC64_TOC16_HI
:
6085 case elfcpp::R_PPC64_TOC16_HA
:
6086 case elfcpp::R_PPC64_TOC16_DS
:
6087 case elfcpp::R_PPC64_TOC16_LO_DS
:
6088 // We need a GOT section.
6089 target
->got_section(symtab
, layout
);
6092 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6093 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6094 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6095 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6097 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6098 if (tls_type
== tls::TLSOPT_NONE
)
6100 Output_data_got_powerpc
<size
, big_endian
>* got
6101 = target
->got_section(symtab
, layout
);
6102 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6103 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6104 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6105 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6107 else if (tls_type
== tls::TLSOPT_TO_LE
)
6109 // no GOT relocs needed for Local Exec.
6116 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6117 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6118 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6119 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6121 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6122 if (tls_type
== tls::TLSOPT_NONE
)
6123 target
->tlsld_got_offset(symtab
, layout
, object
);
6124 else if (tls_type
== tls::TLSOPT_TO_LE
)
6126 // no GOT relocs needed for Local Exec.
6127 if (parameters
->options().emit_relocs())
6129 Output_section
* os
= layout
->tls_segment()->first_section();
6130 gold_assert(os
!= NULL
);
6131 os
->set_needs_symtab_index();
6139 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6140 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6141 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6142 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6144 Output_data_got_powerpc
<size
, big_endian
>* got
6145 = target
->got_section(symtab
, layout
);
6146 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6147 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6151 case elfcpp::R_POWERPC_GOT_TPREL16
:
6152 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6153 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6154 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6156 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6157 if (tls_type
== tls::TLSOPT_NONE
)
6159 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6160 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6162 Output_data_got_powerpc
<size
, big_endian
>* got
6163 = target
->got_section(symtab
, layout
);
6164 unsigned int off
= got
->add_constant(0);
6165 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6167 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6168 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6169 elfcpp::R_POWERPC_TPREL
,
6173 else if (tls_type
== tls::TLSOPT_TO_LE
)
6175 // no GOT relocs needed for Local Exec.
6183 unsupported_reloc_local(object
, r_type
);
6188 && parameters
->options().toc_optimize())
6190 if (data_shndx
== ppc_object
->toc_shndx())
6193 if (r_type
!= elfcpp::R_PPC64_ADDR64
6194 || (is_ifunc
&& target
->abiversion() < 2))
6196 else if (parameters
->options().output_is_position_independent())
6202 unsigned int shndx
= lsym
.get_st_shndx();
6203 if (shndx
>= elfcpp::SHN_LORESERVE
6204 && shndx
!= elfcpp::SHN_XINDEX
)
6209 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6212 enum {no_check
, check_lo
, check_ha
} insn_check
;
6216 insn_check
= no_check
;
6219 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6220 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6221 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6222 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6223 case elfcpp::R_POWERPC_GOT16_HA
:
6224 case elfcpp::R_PPC64_TOC16_HA
:
6225 insn_check
= check_ha
;
6228 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6229 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6230 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6231 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6232 case elfcpp::R_POWERPC_GOT16_LO
:
6233 case elfcpp::R_PPC64_GOT16_LO_DS
:
6234 case elfcpp::R_PPC64_TOC16_LO
:
6235 case elfcpp::R_PPC64_TOC16_LO_DS
:
6236 insn_check
= check_lo
;
6240 section_size_type slen
;
6241 const unsigned char* view
= NULL
;
6242 if (insn_check
!= no_check
)
6244 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6245 section_size_type off
=
6246 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6249 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6250 if (insn_check
== check_lo
6251 ? !ok_lo_toc_insn(insn
, r_type
)
6252 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6253 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6255 ppc_object
->set_no_toc_opt();
6256 gold_warning(_("%s: toc optimization is not supported "
6257 "for %#08x instruction"),
6258 ppc_object
->name().c_str(), insn
);
6267 case elfcpp::R_PPC64_TOC16
:
6268 case elfcpp::R_PPC64_TOC16_LO
:
6269 case elfcpp::R_PPC64_TOC16_HI
:
6270 case elfcpp::R_PPC64_TOC16_HA
:
6271 case elfcpp::R_PPC64_TOC16_DS
:
6272 case elfcpp::R_PPC64_TOC16_LO_DS
:
6273 unsigned int shndx
= lsym
.get_st_shndx();
6274 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6276 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6277 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6279 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_offset();
6280 if (dst_off
< ppc_object
->section_size(shndx
))
6283 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6285 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6287 // Need to check that the insn is a ld
6289 view
= ppc_object
->section_contents(data_shndx
,
6292 section_size_type off
=
6293 (convert_to_section_size_type(reloc
.get_r_offset())
6294 + (big_endian
? -2 : 3));
6296 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6300 ppc_object
->set_no_toc_opt(dst_off
);
6311 case elfcpp::R_POWERPC_REL32
:
6312 if (ppc_object
->got2_shndx() != 0
6313 && parameters
->options().output_is_position_independent())
6315 unsigned int shndx
= lsym
.get_st_shndx();
6316 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6318 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6319 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
6320 && (ppc_object
->section_flags(data_shndx
)
6321 & elfcpp::SHF_EXECINSTR
) != 0)
6322 gold_error(_("%s: unsupported -mbss-plt code"),
6323 ppc_object
->name().c_str());
6333 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6334 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6335 case elfcpp::R_POWERPC_GOT_TPREL16
:
6336 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6337 case elfcpp::R_POWERPC_GOT16
:
6338 case elfcpp::R_PPC64_GOT16_DS
:
6339 case elfcpp::R_PPC64_TOC16
:
6340 case elfcpp::R_PPC64_TOC16_DS
:
6341 ppc_object
->set_has_small_toc_reloc();
6347 // Report an unsupported relocation against a global symbol.
6349 template<int size
, bool big_endian
>
6351 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
6352 Sized_relobj_file
<size
, big_endian
>* object
,
6353 unsigned int r_type
,
6356 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
6357 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
6360 // Scan a relocation for a global symbol.
6362 template<int size
, bool big_endian
>
6364 Target_powerpc
<size
, big_endian
>::Scan::global(
6365 Symbol_table
* symtab
,
6367 Target_powerpc
<size
, big_endian
>* target
,
6368 Sized_relobj_file
<size
, big_endian
>* object
,
6369 unsigned int data_shndx
,
6370 Output_section
* output_section
,
6371 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6372 unsigned int r_type
,
6375 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
6378 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6379 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6381 this->expect_tls_get_addr_call();
6382 const bool final
= gsym
->final_value_is_known();
6383 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6384 if (tls_type
!= tls::TLSOPT_NONE
)
6385 this->skip_next_tls_get_addr_call();
6387 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6388 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6390 this->expect_tls_get_addr_call();
6391 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6392 if (tls_type
!= tls::TLSOPT_NONE
)
6393 this->skip_next_tls_get_addr_call();
6396 Powerpc_relobj
<size
, big_endian
>* ppc_object
6397 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6399 // A STT_GNU_IFUNC symbol may require a PLT entry.
6400 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
6401 bool pushed_ifunc
= false;
6402 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6404 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6405 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6406 r_type
, r_sym
, reloc
.get_r_addend());
6407 target
->make_plt_entry(symtab
, layout
, gsym
);
6408 pushed_ifunc
= true;
6413 case elfcpp::R_POWERPC_NONE
:
6414 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6415 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6416 case elfcpp::R_PPC_LOCAL24PC
:
6417 case elfcpp::R_POWERPC_TLS
:
6418 case elfcpp::R_PPC64_ENTRY
:
6421 case elfcpp::R_PPC64_TOC
:
6423 Output_data_got_powerpc
<size
, big_endian
>* got
6424 = target
->got_section(symtab
, layout
);
6425 if (parameters
->options().output_is_position_independent())
6427 Address off
= reloc
.get_r_offset();
6429 && data_shndx
== ppc_object
->opd_shndx()
6430 && ppc_object
->get_opd_discard(off
- 8))
6433 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6434 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6435 if (data_shndx
!= ppc_object
->opd_shndx())
6436 symobj
= static_cast
6437 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6438 rela_dyn
->add_output_section_relative(got
->output_section(),
6439 elfcpp::R_POWERPC_RELATIVE
,
6441 object
, data_shndx
, off
,
6442 symobj
->toc_base_offset());
6447 case elfcpp::R_PPC64_ADDR64
:
6449 && target
->abiversion() < 2
6450 && data_shndx
== ppc_object
->opd_shndx()
6451 && (gsym
->is_defined_in_discarded_section()
6452 || gsym
->object() != object
))
6454 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6458 case elfcpp::R_PPC64_UADDR64
:
6459 case elfcpp::R_POWERPC_ADDR32
:
6460 case elfcpp::R_POWERPC_UADDR32
:
6461 case elfcpp::R_POWERPC_ADDR24
:
6462 case elfcpp::R_POWERPC_ADDR16
:
6463 case elfcpp::R_POWERPC_ADDR16_LO
:
6464 case elfcpp::R_POWERPC_ADDR16_HI
:
6465 case elfcpp::R_POWERPC_ADDR16_HA
:
6466 case elfcpp::R_POWERPC_UADDR16
:
6467 case elfcpp::R_PPC64_ADDR16_HIGH
:
6468 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6469 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6470 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6471 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6472 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6473 case elfcpp::R_PPC64_ADDR16_DS
:
6474 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6475 case elfcpp::R_POWERPC_ADDR14
:
6476 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6477 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6479 // Make a PLT entry if necessary.
6480 if (gsym
->needs_plt_entry())
6482 // Since this is not a PC-relative relocation, we may be
6483 // taking the address of a function. In that case we need to
6484 // set the entry in the dynamic symbol table to the address of
6485 // the PLT call stub.
6486 bool need_ifunc_plt
= false;
6487 if ((size
== 32 || target
->abiversion() >= 2)
6488 && gsym
->is_from_dynobj()
6489 && !parameters
->options().output_is_position_independent())
6491 gsym
->set_needs_dynsym_value();
6492 need_ifunc_plt
= true;
6494 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6496 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6497 target
->push_branch(ppc_object
, data_shndx
,
6498 reloc
.get_r_offset(), r_type
, r_sym
,
6499 reloc
.get_r_addend());
6500 target
->make_plt_entry(symtab
, layout
, gsym
);
6503 // Make a dynamic relocation if necessary.
6504 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6505 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6507 if (!parameters
->options().output_is_position_independent()
6508 && gsym
->may_need_copy_reloc())
6510 target
->copy_reloc(symtab
, layout
, object
,
6511 data_shndx
, output_section
, gsym
, reloc
);
6513 else if ((((size
== 32
6514 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6516 && r_type
== elfcpp::R_PPC64_ADDR64
6517 && target
->abiversion() >= 2))
6518 && gsym
->can_use_relative_reloc(false)
6519 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6520 && parameters
->options().shared()))
6522 && r_type
== elfcpp::R_PPC64_ADDR64
6523 && target
->abiversion() < 2
6524 && (gsym
->can_use_relative_reloc(false)
6525 || data_shndx
== ppc_object
->opd_shndx())))
6527 Reloc_section
* rela_dyn
6528 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6529 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6530 : elfcpp::R_POWERPC_RELATIVE
);
6531 rela_dyn
->add_symbolless_global_addend(
6532 gsym
, dynrel
, output_section
, object
, data_shndx
,
6533 reloc
.get_r_offset(), reloc
.get_r_addend());
6537 Reloc_section
* rela_dyn
6538 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6539 check_non_pic(object
, r_type
);
6540 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6542 reloc
.get_r_offset(),
6543 reloc
.get_r_addend());
6546 && parameters
->options().toc_optimize()
6547 && data_shndx
== ppc_object
->toc_shndx())
6548 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6554 case elfcpp::R_PPC_PLTREL24
:
6555 case elfcpp::R_POWERPC_REL24
:
6558 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6559 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6560 r_type
, r_sym
, reloc
.get_r_addend());
6561 if (gsym
->needs_plt_entry()
6562 || (!gsym
->final_value_is_known()
6563 && (gsym
->is_undefined()
6564 || gsym
->is_from_dynobj()
6565 || gsym
->is_preemptible())))
6566 target
->make_plt_entry(symtab
, layout
, gsym
);
6570 case elfcpp::R_PPC64_REL64
:
6571 case elfcpp::R_POWERPC_REL32
:
6572 // Make a dynamic relocation if necessary.
6573 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6575 if (!parameters
->options().output_is_position_independent()
6576 && gsym
->may_need_copy_reloc())
6578 target
->copy_reloc(symtab
, layout
, object
,
6579 data_shndx
, output_section
, gsym
,
6584 Reloc_section
* rela_dyn
6585 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6586 check_non_pic(object
, r_type
);
6587 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6588 data_shndx
, reloc
.get_r_offset(),
6589 reloc
.get_r_addend());
6594 case elfcpp::R_POWERPC_REL14
:
6595 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6596 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6599 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6600 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6601 r_type
, r_sym
, reloc
.get_r_addend());
6605 case elfcpp::R_POWERPC_REL16
:
6606 case elfcpp::R_POWERPC_REL16_LO
:
6607 case elfcpp::R_POWERPC_REL16_HI
:
6608 case elfcpp::R_POWERPC_REL16_HA
:
6609 case elfcpp::R_POWERPC_REL16DX_HA
:
6610 case elfcpp::R_POWERPC_SECTOFF
:
6611 case elfcpp::R_POWERPC_SECTOFF_LO
:
6612 case elfcpp::R_POWERPC_SECTOFF_HI
:
6613 case elfcpp::R_POWERPC_SECTOFF_HA
:
6614 case elfcpp::R_PPC64_SECTOFF_DS
:
6615 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6616 case elfcpp::R_POWERPC_TPREL16
:
6617 case elfcpp::R_POWERPC_TPREL16_LO
:
6618 case elfcpp::R_POWERPC_TPREL16_HI
:
6619 case elfcpp::R_POWERPC_TPREL16_HA
:
6620 case elfcpp::R_PPC64_TPREL16_DS
:
6621 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6622 case elfcpp::R_PPC64_TPREL16_HIGH
:
6623 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6624 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6625 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6626 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6627 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6628 case elfcpp::R_POWERPC_DTPREL16
:
6629 case elfcpp::R_POWERPC_DTPREL16_LO
:
6630 case elfcpp::R_POWERPC_DTPREL16_HI
:
6631 case elfcpp::R_POWERPC_DTPREL16_HA
:
6632 case elfcpp::R_PPC64_DTPREL16_DS
:
6633 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6634 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6635 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6636 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6637 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6638 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6639 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6640 case elfcpp::R_PPC64_TLSGD
:
6641 case elfcpp::R_PPC64_TLSLD
:
6642 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6645 case elfcpp::R_POWERPC_GOT16
:
6646 case elfcpp::R_POWERPC_GOT16_LO
:
6647 case elfcpp::R_POWERPC_GOT16_HI
:
6648 case elfcpp::R_POWERPC_GOT16_HA
:
6649 case elfcpp::R_PPC64_GOT16_DS
:
6650 case elfcpp::R_PPC64_GOT16_LO_DS
:
6652 // The symbol requires a GOT entry.
6653 Output_data_got_powerpc
<size
, big_endian
>* got
;
6655 got
= target
->got_section(symtab
, layout
);
6656 if (gsym
->final_value_is_known())
6659 && (size
== 32 || target
->abiversion() >= 2))
6660 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6662 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6664 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6666 // If we are generating a shared object or a pie, this
6667 // symbol's GOT entry will be set by a dynamic relocation.
6668 unsigned int off
= got
->add_constant(0);
6669 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6671 Reloc_section
* rela_dyn
6672 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6674 if (gsym
->can_use_relative_reloc(false)
6676 || target
->abiversion() >= 2)
6677 && gsym
->visibility() == elfcpp::STV_PROTECTED
6678 && parameters
->options().shared()))
6680 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6681 : elfcpp::R_POWERPC_RELATIVE
);
6682 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6686 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6687 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6693 case elfcpp::R_PPC64_TOC16
:
6694 case elfcpp::R_PPC64_TOC16_LO
:
6695 case elfcpp::R_PPC64_TOC16_HI
:
6696 case elfcpp::R_PPC64_TOC16_HA
:
6697 case elfcpp::R_PPC64_TOC16_DS
:
6698 case elfcpp::R_PPC64_TOC16_LO_DS
:
6699 // We need a GOT section.
6700 target
->got_section(symtab
, layout
);
6703 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6704 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6705 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6706 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6708 const bool final
= gsym
->final_value_is_known();
6709 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6710 if (tls_type
== tls::TLSOPT_NONE
)
6712 Output_data_got_powerpc
<size
, big_endian
>* got
6713 = target
->got_section(symtab
, layout
);
6714 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6715 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6716 elfcpp::R_POWERPC_DTPMOD
,
6717 elfcpp::R_POWERPC_DTPREL
);
6719 else if (tls_type
== tls::TLSOPT_TO_IE
)
6721 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6723 Output_data_got_powerpc
<size
, big_endian
>* got
6724 = target
->got_section(symtab
, layout
);
6725 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6726 if (gsym
->is_undefined()
6727 || gsym
->is_from_dynobj())
6729 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6730 elfcpp::R_POWERPC_TPREL
);
6734 unsigned int off
= got
->add_constant(0);
6735 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6736 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6737 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6742 else if (tls_type
== tls::TLSOPT_TO_LE
)
6744 // no GOT relocs needed for Local Exec.
6751 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6752 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6753 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6754 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6756 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6757 if (tls_type
== tls::TLSOPT_NONE
)
6758 target
->tlsld_got_offset(symtab
, layout
, object
);
6759 else if (tls_type
== tls::TLSOPT_TO_LE
)
6761 // no GOT relocs needed for Local Exec.
6762 if (parameters
->options().emit_relocs())
6764 Output_section
* os
= layout
->tls_segment()->first_section();
6765 gold_assert(os
!= NULL
);
6766 os
->set_needs_symtab_index();
6774 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6775 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6776 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6777 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6779 Output_data_got_powerpc
<size
, big_endian
>* got
6780 = target
->got_section(symtab
, layout
);
6781 if (!gsym
->final_value_is_known()
6782 && (gsym
->is_from_dynobj()
6783 || gsym
->is_undefined()
6784 || gsym
->is_preemptible()))
6785 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6786 target
->rela_dyn_section(layout
),
6787 elfcpp::R_POWERPC_DTPREL
);
6789 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6793 case elfcpp::R_POWERPC_GOT_TPREL16
:
6794 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6795 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6796 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6798 const bool final
= gsym
->final_value_is_known();
6799 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6800 if (tls_type
== tls::TLSOPT_NONE
)
6802 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6804 Output_data_got_powerpc
<size
, big_endian
>* got
6805 = target
->got_section(symtab
, layout
);
6806 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6807 if (gsym
->is_undefined()
6808 || gsym
->is_from_dynobj())
6810 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6811 elfcpp::R_POWERPC_TPREL
);
6815 unsigned int off
= got
->add_constant(0);
6816 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6817 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6818 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6823 else if (tls_type
== tls::TLSOPT_TO_LE
)
6825 // no GOT relocs needed for Local Exec.
6833 unsupported_reloc_global(object
, r_type
, gsym
);
6838 && parameters
->options().toc_optimize())
6840 if (data_shndx
== ppc_object
->toc_shndx())
6843 if (r_type
!= elfcpp::R_PPC64_ADDR64
6844 || (is_ifunc
&& target
->abiversion() < 2))
6846 else if (parameters
->options().output_is_position_independent()
6847 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
6850 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6853 enum {no_check
, check_lo
, check_ha
} insn_check
;
6857 insn_check
= no_check
;
6860 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6861 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6862 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6863 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6864 case elfcpp::R_POWERPC_GOT16_HA
:
6865 case elfcpp::R_PPC64_TOC16_HA
:
6866 insn_check
= check_ha
;
6869 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6870 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6871 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6872 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6873 case elfcpp::R_POWERPC_GOT16_LO
:
6874 case elfcpp::R_PPC64_GOT16_LO_DS
:
6875 case elfcpp::R_PPC64_TOC16_LO
:
6876 case elfcpp::R_PPC64_TOC16_LO_DS
:
6877 insn_check
= check_lo
;
6881 section_size_type slen
;
6882 const unsigned char* view
= NULL
;
6883 if (insn_check
!= no_check
)
6885 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6886 section_size_type off
=
6887 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6890 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6891 if (insn_check
== check_lo
6892 ? !ok_lo_toc_insn(insn
, r_type
)
6893 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6894 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6896 ppc_object
->set_no_toc_opt();
6897 gold_warning(_("%s: toc optimization is not supported "
6898 "for %#08x instruction"),
6899 ppc_object
->name().c_str(), insn
);
6908 case elfcpp::R_PPC64_TOC16
:
6909 case elfcpp::R_PPC64_TOC16_LO
:
6910 case elfcpp::R_PPC64_TOC16_HI
:
6911 case elfcpp::R_PPC64_TOC16_HA
:
6912 case elfcpp::R_PPC64_TOC16_DS
:
6913 case elfcpp::R_PPC64_TOC16_LO_DS
:
6914 if (gsym
->source() == Symbol::FROM_OBJECT
6915 && !gsym
->object()->is_dynamic())
6917 Powerpc_relobj
<size
, big_endian
>* sym_object
6918 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6920 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
6921 if (shndx
== sym_object
->toc_shndx())
6923 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
6924 Address dst_off
= sym
->value() + reloc
.get_r_offset();
6925 if (dst_off
< sym_object
->section_size(shndx
))
6928 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6930 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6932 // Need to check that the insn is a ld
6934 view
= ppc_object
->section_contents(data_shndx
,
6937 section_size_type off
=
6938 (convert_to_section_size_type(reloc
.get_r_offset())
6939 + (big_endian
? -2 : 3));
6941 && (view
[off
] & (0x3f << 2)) == (58u << 2))
6945 sym_object
->set_no_toc_opt(dst_off
);
6957 case elfcpp::R_PPC_LOCAL24PC
:
6958 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
6959 gold_error(_("%s: unsupported -mbss-plt code"),
6960 ppc_object
->name().c_str());
6969 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6970 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6971 case elfcpp::R_POWERPC_GOT_TPREL16
:
6972 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6973 case elfcpp::R_POWERPC_GOT16
:
6974 case elfcpp::R_PPC64_GOT16_DS
:
6975 case elfcpp::R_PPC64_TOC16
:
6976 case elfcpp::R_PPC64_TOC16_DS
:
6977 ppc_object
->set_has_small_toc_reloc();
6983 // Process relocations for gc.
6985 template<int size
, bool big_endian
>
6987 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6988 Symbol_table
* symtab
,
6990 Sized_relobj_file
<size
, big_endian
>* object
,
6991 unsigned int data_shndx
,
6993 const unsigned char* prelocs
,
6995 Output_section
* output_section
,
6996 bool needs_special_offset_handling
,
6997 size_t local_symbol_count
,
6998 const unsigned char* plocal_symbols
)
7000 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7001 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7004 Powerpc_relobj
<size
, big_endian
>* ppc_object
7005 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7007 ppc_object
->set_opd_valid();
7008 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7010 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7011 for (p
= ppc_object
->access_from_map()->begin();
7012 p
!= ppc_object
->access_from_map()->end();
7015 Address dst_off
= p
->first
;
7016 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7017 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7018 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7020 Relobj
* src_obj
= s
->first
;
7021 unsigned int src_indx
= s
->second
;
7022 symtab
->gc()->add_reference(src_obj
, src_indx
,
7023 ppc_object
, dst_indx
);
7027 ppc_object
->access_from_map()->clear();
7028 ppc_object
->process_gc_mark(symtab
);
7029 // Don't look at .opd relocs as .opd will reference everything.
7033 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7042 needs_special_offset_handling
,
7047 // Handle target specific gc actions when adding a gc reference from
7048 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7049 // and DST_OFF. For powerpc64, this adds a referenc to the code
7050 // section of a function descriptor.
7052 template<int size
, bool big_endian
>
7054 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7055 Symbol_table
* symtab
,
7057 unsigned int src_shndx
,
7059 unsigned int dst_shndx
,
7060 Address dst_off
) const
7062 if (size
!= 64 || dst_obj
->is_dynamic())
7065 Powerpc_relobj
<size
, big_endian
>* ppc_object
7066 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7067 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7069 if (ppc_object
->opd_valid())
7071 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7072 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7076 // If we haven't run scan_opd_relocs, we must delay
7077 // processing this function descriptor reference.
7078 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7083 // Add any special sections for this symbol to the gc work list.
7084 // For powerpc64, this adds the code section of a function
7087 template<int size
, bool big_endian
>
7089 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7090 Symbol_table
* symtab
,
7095 Powerpc_relobj
<size
, big_endian
>* ppc_object
7096 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7098 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7099 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7101 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7102 Address dst_off
= gsym
->value();
7103 if (ppc_object
->opd_valid())
7105 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7106 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7110 ppc_object
->add_gc_mark(dst_off
);
7115 // For a symbol location in .opd, set LOC to the location of the
7118 template<int size
, bool big_endian
>
7120 Target_powerpc
<size
, big_endian
>::do_function_location(
7121 Symbol_location
* loc
) const
7123 if (size
== 64 && loc
->shndx
!= 0)
7125 if (loc
->object
->is_dynamic())
7127 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7128 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7129 if (loc
->shndx
== ppc_object
->opd_shndx())
7132 Address off
= loc
->offset
- ppc_object
->opd_address();
7133 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7134 loc
->offset
= dest_off
;
7139 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7140 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7141 if (loc
->shndx
== ppc_object
->opd_shndx())
7144 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7145 loc
->offset
= dest_off
;
7151 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7152 // compiled with -fsplit-stack. The function calls non-split-stack
7153 // code. Change the function to ensure it has enough stack space to
7154 // call some random function.
7156 template<int size
, bool big_endian
>
7158 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7161 section_offset_type fnoffset
,
7162 section_size_type fnsize
,
7163 const unsigned char* prelocs
,
7165 unsigned char* view
,
7166 section_size_type view_size
,
7168 std::string
* to
) const
7170 // 32-bit not supported.
7174 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7175 prelocs
, reloc_count
, view
, view_size
,
7180 // The function always starts with
7181 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7182 // addis %r12,%r1,-allocate@ha
7183 // addi %r12,%r12,-allocate@l
7185 // but note that the addis or addi may be replaced with a nop
7187 unsigned char *entry
= view
+ fnoffset
;
7188 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7190 if ((insn
& 0xffff0000) == addis_2_12
)
7192 /* Skip ELFv2 global entry code. */
7194 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7197 unsigned char *pinsn
= entry
;
7199 const uint32_t ld_private_ss
= 0xe80d8fc0;
7200 if (insn
== ld_private_ss
)
7202 int32_t allocate
= 0;
7206 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7207 if ((insn
& 0xffff0000) == addis_12_1
)
7208 allocate
+= (insn
& 0xffff) << 16;
7209 else if ((insn
& 0xffff0000) == addi_12_1
7210 || (insn
& 0xffff0000) == addi_12_12
)
7211 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7212 else if (insn
!= nop
)
7215 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7217 int extra
= parameters
->options().split_stack_adjust_size();
7219 if (allocate
>= 0 || extra
< 0)
7221 object
->error(_("split-stack stack size overflow at "
7222 "section %u offset %0zx"),
7223 shndx
, static_cast<size_t>(fnoffset
));
7227 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7228 if (insn
!= addis_12_1
)
7230 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7232 insn
= addi_12_12
| (allocate
& 0xffff);
7233 if (insn
!= addi_12_12
)
7235 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7241 insn
= addi_12_1
| (allocate
& 0xffff);
7242 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7245 if (pinsn
!= entry
+ 12)
7246 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7254 if (!object
->has_no_split_stack())
7255 object
->error(_("failed to match split-stack sequence at "
7256 "section %u offset %0zx"),
7257 shndx
, static_cast<size_t>(fnoffset
));
7261 // Scan relocations for a section.
7263 template<int size
, bool big_endian
>
7265 Target_powerpc
<size
, big_endian
>::scan_relocs(
7266 Symbol_table
* symtab
,
7268 Sized_relobj_file
<size
, big_endian
>* object
,
7269 unsigned int data_shndx
,
7270 unsigned int sh_type
,
7271 const unsigned char* prelocs
,
7273 Output_section
* output_section
,
7274 bool needs_special_offset_handling
,
7275 size_t local_symbol_count
,
7276 const unsigned char* plocal_symbols
)
7278 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7279 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7282 if (sh_type
== elfcpp::SHT_REL
)
7284 gold_error(_("%s: unsupported REL reloc section"),
7285 object
->name().c_str());
7289 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7298 needs_special_offset_handling
,
7303 // Functor class for processing the global symbol table.
7304 // Removes symbols defined on discarded opd entries.
7306 template<bool big_endian
>
7307 class Global_symbol_visitor_opd
7310 Global_symbol_visitor_opd()
7314 operator()(Sized_symbol
<64>* sym
)
7316 if (sym
->has_symtab_index()
7317 || sym
->source() != Symbol::FROM_OBJECT
7318 || !sym
->in_real_elf())
7321 if (sym
->object()->is_dynamic())
7324 Powerpc_relobj
<64, big_endian
>* symobj
7325 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
7326 if (symobj
->opd_shndx() == 0)
7330 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7331 if (shndx
== symobj
->opd_shndx()
7332 && symobj
->get_opd_discard(sym
->value()))
7334 sym
->set_undefined();
7335 sym
->set_visibility(elfcpp::STV_DEFAULT
);
7336 sym
->set_is_defined_in_discarded_section();
7337 sym
->set_symtab_index(-1U);
7342 template<int size
, bool big_endian
>
7344 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
7346 Symbol_table
* symtab
)
7350 Output_data_save_res
<size
, big_endian
>* savres
7351 = new Output_data_save_res
<size
, big_endian
>(symtab
);
7352 this->savres_section_
= savres
;
7353 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
7354 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
7355 savres
, ORDER_TEXT
, false);
7359 // Sort linker created .got section first (for the header), then input
7360 // sections belonging to files using small model code.
7362 template<bool big_endian
>
7363 class Sort_toc_sections
7367 operator()(const Output_section::Input_section
& is1
,
7368 const Output_section::Input_section
& is2
) const
7370 if (!is1
.is_input_section() && is2
.is_input_section())
7373 = (is1
.is_input_section()
7374 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
7375 ->has_small_toc_reloc()));
7377 = (is2
.is_input_section()
7378 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
7379 ->has_small_toc_reloc()));
7380 return small1
&& !small2
;
7384 // Finalize the sections.
7386 template<int size
, bool big_endian
>
7388 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
7390 const Input_objects
*,
7391 Symbol_table
* symtab
)
7393 if (parameters
->doing_static_link())
7395 // At least some versions of glibc elf-init.o have a strong
7396 // reference to __rela_iplt marker syms. A weak ref would be
7398 if (this->iplt_
!= NULL
)
7400 Reloc_section
* rel
= this->iplt_
->rel_plt();
7401 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
7402 Symbol_table::PREDEFINED
, rel
, 0, 0,
7403 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7404 elfcpp::STV_HIDDEN
, 0, false, true);
7405 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
7406 Symbol_table::PREDEFINED
, rel
, 0, 0,
7407 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7408 elfcpp::STV_HIDDEN
, 0, true, true);
7412 symtab
->define_as_constant("__rela_iplt_start", NULL
,
7413 Symbol_table::PREDEFINED
, 0, 0,
7414 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7415 elfcpp::STV_HIDDEN
, 0, true, false);
7416 symtab
->define_as_constant("__rela_iplt_end", NULL
,
7417 Symbol_table::PREDEFINED
, 0, 0,
7418 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7419 elfcpp::STV_HIDDEN
, 0, true, false);
7425 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
7426 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
7428 if (!parameters
->options().relocatable())
7430 this->define_save_restore_funcs(layout
, symtab
);
7432 // Annoyingly, we need to make these sections now whether or
7433 // not we need them. If we delay until do_relax then we
7434 // need to mess with the relaxation machinery checkpointing.
7435 this->got_section(symtab
, layout
);
7436 this->make_brlt_section(layout
);
7438 if (parameters
->options().toc_sort())
7440 Output_section
* os
= this->got_
->output_section();
7441 if (os
!= NULL
&& os
->input_sections().size() > 1)
7442 std::stable_sort(os
->input_sections().begin(),
7443 os
->input_sections().end(),
7444 Sort_toc_sections
<big_endian
>());
7449 // Fill in some more dynamic tags.
7450 Output_data_dynamic
* odyn
= layout
->dynamic_data();
7453 const Reloc_section
* rel_plt
= (this->plt_
== NULL
7455 : this->plt_
->rel_plt());
7456 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
7457 this->rela_dyn_
, true, size
== 32);
7461 if (this->got_
!= NULL
)
7463 this->got_
->finalize_data_size();
7464 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
7465 this->got_
, this->got_
->g_o_t());
7470 if (this->glink_
!= NULL
)
7472 this->glink_
->finalize_data_size();
7473 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
7475 (this->glink_
->pltresolve_size
7481 // Emit any relocs we saved in an attempt to avoid generating COPY
7483 if (this->copy_relocs_
.any_saved_relocs())
7484 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
7487 // Emit any saved relocs, and mark toc entries using any of these
7488 // relocs as not optimizable.
7490 template<int sh_type
, int size
, bool big_endian
>
7492 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
7493 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
7496 && parameters
->options().toc_optimize())
7498 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
7499 Copy_reloc_entries::iterator p
= this->entries_
.begin();
7500 p
!= this->entries_
.end();
7503 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
7506 // If the symbol is no longer defined in a dynamic object,
7507 // then we emitted a COPY relocation. If it is still
7508 // dynamic then we'll need dynamic relocations and thus
7509 // can't optimize toc entries.
7510 if (entry
.sym_
->is_from_dynobj())
7512 Powerpc_relobj
<size
, big_endian
>* ppc_object
7513 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
7514 if (entry
.shndx_
== ppc_object
->toc_shndx())
7515 ppc_object
->set_no_toc_opt(entry
.address_
);
7520 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
7523 // Return the value to use for a branch relocation.
7525 template<int size
, bool big_endian
>
7527 Target_powerpc
<size
, big_endian
>::symval_for_branch(
7528 const Symbol_table
* symtab
,
7529 const Sized_symbol
<size
>* gsym
,
7530 Powerpc_relobj
<size
, big_endian
>* object
,
7532 unsigned int *dest_shndx
)
7534 if (size
== 32 || this->abiversion() >= 2)
7538 // If the symbol is defined in an opd section, ie. is a function
7539 // descriptor, use the function descriptor code entry address
7540 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
7542 && (gsym
->source() != Symbol::FROM_OBJECT
7543 || gsym
->object()->is_dynamic()))
7546 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7547 unsigned int shndx
= symobj
->opd_shndx();
7550 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
7551 if (opd_addr
== invalid_address
)
7553 opd_addr
+= symobj
->output_section_address(shndx
);
7554 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
7557 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
7558 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
7561 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
7562 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
7563 *dest_shndx
= folded
.second
;
7565 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
7566 if (sec_addr
== invalid_address
)
7569 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
7570 *value
= sec_addr
+ sec_off
;
7575 // Perform a relocation.
7577 template<int size
, bool big_endian
>
7579 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
7580 const Relocate_info
<size
, big_endian
>* relinfo
,
7582 Target_powerpc
* target
,
7585 const unsigned char* preloc
,
7586 const Sized_symbol
<size
>* gsym
,
7587 const Symbol_value
<size
>* psymval
,
7588 unsigned char* view
,
7590 section_size_type view_size
)
7595 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
7596 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
7597 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7599 case Track_tls::NOT_EXPECTED
:
7600 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7601 _("__tls_get_addr call lacks marker reloc"));
7603 case Track_tls::EXPECTED
:
7604 // We have already complained.
7606 case Track_tls::SKIP
:
7608 case Track_tls::NORMAL
:
7612 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
7613 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
7614 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
7615 // Offset from start of insn to d-field reloc.
7616 const int d_offset
= big_endian
? 2 : 0;
7618 Powerpc_relobj
<size
, big_endian
>* const object
7619 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7621 bool has_stub_value
= false;
7622 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7624 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7625 : object
->local_has_plt_offset(r_sym
))
7626 && (!psymval
->is_ifunc_symbol()
7627 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7631 && target
->abiversion() >= 2
7632 && !parameters
->options().output_is_position_independent()
7633 && !is_branch_reloc(r_type
))
7635 Address off
= target
->glink_section()->find_global_entry(gsym
);
7636 if (off
!= invalid_address
)
7638 value
= target
->glink_section()->global_entry_address() + off
;
7639 has_stub_value
= true;
7644 Stub_table
<size
, big_endian
>* stub_table
7645 = object
->stub_table(relinfo
->data_shndx
);
7646 if (stub_table
== NULL
)
7648 // This is a ref from a data section to an ifunc symbol.
7649 if (target
->stub_tables().size() != 0)
7650 stub_table
= target
->stub_tables()[0];
7652 if (stub_table
!= NULL
)
7656 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7657 rela
.get_r_addend());
7659 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7660 rela
.get_r_addend());
7661 if (off
!= invalid_address
)
7663 value
= stub_table
->stub_address() + off
;
7664 has_stub_value
= true;
7668 // We don't care too much about bogus debug references to
7669 // non-local functions, but otherwise there had better be a plt
7670 // call stub or global entry stub as appropriate.
7671 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7674 if (r_type
== elfcpp::R_POWERPC_GOT16
7675 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7676 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7677 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7678 || r_type
== elfcpp::R_PPC64_GOT16_DS
7679 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7683 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7684 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7688 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7689 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7691 value
-= target
->got_section()->got_base_offset(object
);
7693 else if (r_type
== elfcpp::R_PPC64_TOC
)
7695 value
= (target
->got_section()->output_section()->address()
7696 + object
->toc_base_offset());
7698 else if (gsym
!= NULL
7699 && (r_type
== elfcpp::R_POWERPC_REL24
7700 || r_type
== elfcpp::R_PPC_PLTREL24
)
7705 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7706 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7707 bool can_plt_call
= false;
7708 if (rela
.get_r_offset() + 8 <= view_size
)
7710 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7711 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7714 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7716 elfcpp::Swap
<32, big_endian
>::
7717 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7718 can_plt_call
= true;
7723 // If we don't have a branch and link followed by a nop,
7724 // we can't go via the plt because there is no place to
7725 // put a toc restoring instruction.
7726 // Unless we know we won't be returning.
7727 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7728 can_plt_call
= true;
7732 // g++ as of 20130507 emits self-calls without a
7733 // following nop. This is arguably wrong since we have
7734 // conflicting information. On the one hand a global
7735 // symbol and on the other a local call sequence, but
7736 // don't error for this special case.
7737 // It isn't possible to cheaply verify we have exactly
7738 // such a call. Allow all calls to the same section.
7740 Address code
= value
;
7741 if (gsym
->source() == Symbol::FROM_OBJECT
7742 && gsym
->object() == object
)
7744 unsigned int dest_shndx
= 0;
7745 if (target
->abiversion() < 2)
7747 Address addend
= rela
.get_r_addend();
7748 code
= psymval
->value(object
, addend
);
7749 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7750 &code
, &dest_shndx
);
7753 if (dest_shndx
== 0)
7754 dest_shndx
= gsym
->shndx(&is_ordinary
);
7755 ok
= dest_shndx
== relinfo
->data_shndx
;
7759 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7760 _("call lacks nop, can't restore toc; "
7761 "recompile with -fPIC"));
7767 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7768 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7769 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7770 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7772 // First instruction of a global dynamic sequence, arg setup insn.
7773 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7774 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7775 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7776 if (tls_type
== tls::TLSOPT_NONE
)
7777 got_type
= GOT_TYPE_TLSGD
;
7778 else if (tls_type
== tls::TLSOPT_TO_IE
)
7779 got_type
= GOT_TYPE_TPREL
;
7780 if (got_type
!= GOT_TYPE_STANDARD
)
7784 gold_assert(gsym
->has_got_offset(got_type
));
7785 value
= gsym
->got_offset(got_type
);
7789 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7790 value
= object
->local_got_offset(r_sym
, got_type
);
7792 value
-= target
->got_section()->got_base_offset(object
);
7794 if (tls_type
== tls::TLSOPT_TO_IE
)
7796 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7797 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7799 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7800 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7801 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7803 insn
|= 32 << 26; // lwz
7805 insn
|= 58 << 26; // ld
7806 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7808 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7809 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7811 else if (tls_type
== tls::TLSOPT_TO_LE
)
7813 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7814 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7816 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7817 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7818 insn
&= (1 << 26) - (1 << 21); // extract rt
7823 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7824 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7825 value
= psymval
->value(object
, rela
.get_r_addend());
7829 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7831 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7832 r_type
= elfcpp::R_POWERPC_NONE
;
7836 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7837 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7838 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7839 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7841 // First instruction of a local dynamic sequence, arg setup insn.
7842 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7843 if (tls_type
== tls::TLSOPT_NONE
)
7845 value
= target
->tlsld_got_offset();
7846 value
-= target
->got_section()->got_base_offset(object
);
7850 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7851 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7852 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7854 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7855 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7856 insn
&= (1 << 26) - (1 << 21); // extract rt
7861 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7862 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7867 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7869 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7870 r_type
= elfcpp::R_POWERPC_NONE
;
7874 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7875 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7876 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7877 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7879 // Accesses relative to a local dynamic sequence address,
7880 // no optimisation here.
7883 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7884 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7888 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7889 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7891 value
-= target
->got_section()->got_base_offset(object
);
7893 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7894 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7895 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7896 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7898 // First instruction of initial exec sequence.
7899 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7900 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7901 if (tls_type
== tls::TLSOPT_NONE
)
7905 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7906 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7910 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7911 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7913 value
-= target
->got_section()->got_base_offset(object
);
7917 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7918 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7919 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7921 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7922 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7923 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7928 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7929 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7930 value
= psymval
->value(object
, rela
.get_r_addend());
7934 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7936 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7937 r_type
= elfcpp::R_POWERPC_NONE
;
7941 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7942 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7944 // Second instruction of a global dynamic sequence,
7945 // the __tls_get_addr call
7946 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7947 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7948 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7949 if (tls_type
!= tls::TLSOPT_NONE
)
7951 if (tls_type
== tls::TLSOPT_TO_IE
)
7953 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7954 Insn insn
= add_3_3_13
;
7957 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7958 r_type
= elfcpp::R_POWERPC_NONE
;
7962 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7963 Insn insn
= addi_3_3
;
7964 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7965 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7967 value
= psymval
->value(object
, rela
.get_r_addend());
7969 this->skip_next_tls_get_addr_call();
7972 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7973 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7975 // Second instruction of a local dynamic sequence,
7976 // the __tls_get_addr call
7977 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7978 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7979 if (tls_type
== tls::TLSOPT_TO_LE
)
7981 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7982 Insn insn
= addi_3_3
;
7983 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7984 this->skip_next_tls_get_addr_call();
7985 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7990 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7992 // Second instruction of an initial exec sequence
7993 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7994 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7995 if (tls_type
== tls::TLSOPT_TO_LE
)
7997 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7998 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7999 unsigned int reg
= size
== 32 ? 2 : 13;
8000 insn
= at_tls_transform(insn
, reg
);
8001 gold_assert(insn
!= 0);
8002 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8003 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8005 value
= psymval
->value(object
, rela
.get_r_addend());
8008 else if (!has_stub_value
)
8011 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8012 addend
= rela
.get_r_addend();
8013 value
= psymval
->value(object
, addend
);
8014 if (size
== 64 && is_branch_reloc(r_type
))
8016 if (target
->abiversion() >= 2)
8019 value
+= object
->ppc64_local_entry_offset(gsym
);
8021 value
+= object
->ppc64_local_entry_offset(r_sym
);
8025 unsigned int dest_shndx
;
8026 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8027 &value
, &dest_shndx
);
8030 Address max_branch_offset
= max_branch_delta(r_type
);
8031 if (max_branch_offset
!= 0
8032 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8034 Stub_table
<size
, big_endian
>* stub_table
8035 = object
->stub_table(relinfo
->data_shndx
);
8036 if (stub_table
!= NULL
)
8038 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8039 if (off
!= invalid_address
)
8041 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8043 has_stub_value
= true;
8051 case elfcpp::R_PPC64_REL64
:
8052 case elfcpp::R_POWERPC_REL32
:
8053 case elfcpp::R_POWERPC_REL24
:
8054 case elfcpp::R_PPC_PLTREL24
:
8055 case elfcpp::R_PPC_LOCAL24PC
:
8056 case elfcpp::R_POWERPC_REL16
:
8057 case elfcpp::R_POWERPC_REL16_LO
:
8058 case elfcpp::R_POWERPC_REL16_HI
:
8059 case elfcpp::R_POWERPC_REL16_HA
:
8060 case elfcpp::R_POWERPC_REL16DX_HA
:
8061 case elfcpp::R_POWERPC_REL14
:
8062 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8063 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8067 case elfcpp::R_PPC64_TOC16
:
8068 case elfcpp::R_PPC64_TOC16_LO
:
8069 case elfcpp::R_PPC64_TOC16_HI
:
8070 case elfcpp::R_PPC64_TOC16_HA
:
8071 case elfcpp::R_PPC64_TOC16_DS
:
8072 case elfcpp::R_PPC64_TOC16_LO_DS
:
8073 // Subtract the TOC base address.
8074 value
-= (target
->got_section()->output_section()->address()
8075 + object
->toc_base_offset());
8078 case elfcpp::R_POWERPC_SECTOFF
:
8079 case elfcpp::R_POWERPC_SECTOFF_LO
:
8080 case elfcpp::R_POWERPC_SECTOFF_HI
:
8081 case elfcpp::R_POWERPC_SECTOFF_HA
:
8082 case elfcpp::R_PPC64_SECTOFF_DS
:
8083 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8085 value
-= os
->address();
8088 case elfcpp::R_PPC64_TPREL16_DS
:
8089 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8090 case elfcpp::R_PPC64_TPREL16_HIGH
:
8091 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8093 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8096 case elfcpp::R_POWERPC_TPREL16
:
8097 case elfcpp::R_POWERPC_TPREL16_LO
:
8098 case elfcpp::R_POWERPC_TPREL16_HI
:
8099 case elfcpp::R_POWERPC_TPREL16_HA
:
8100 case elfcpp::R_POWERPC_TPREL
:
8101 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8102 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8103 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8104 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8105 // tls symbol values are relative to tls_segment()->vaddr()
8109 case elfcpp::R_PPC64_DTPREL16_DS
:
8110 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8111 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8112 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8113 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8114 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8116 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8117 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8120 case elfcpp::R_POWERPC_DTPREL16
:
8121 case elfcpp::R_POWERPC_DTPREL16_LO
:
8122 case elfcpp::R_POWERPC_DTPREL16_HI
:
8123 case elfcpp::R_POWERPC_DTPREL16_HA
:
8124 case elfcpp::R_POWERPC_DTPREL
:
8125 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8126 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8127 // tls symbol values are relative to tls_segment()->vaddr()
8128 value
-= dtp_offset
;
8131 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8133 value
+= object
->ppc64_local_entry_offset(gsym
);
8135 value
+= object
->ppc64_local_entry_offset(r_sym
);
8142 Insn branch_bit
= 0;
8145 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8146 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8147 branch_bit
= 1 << 21;
8149 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8150 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8152 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8153 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8156 if (this->is_isa_v2
)
8158 // Set 'a' bit. This is 0b00010 in BO field for branch
8159 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8160 // for branch on CTR insns (BO == 1a00t or 1a01t).
8161 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8163 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8170 // Invert 'y' bit if not the default.
8171 if (static_cast<Signed_address
>(value
) < 0)
8174 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8189 // Multi-instruction sequences that access the GOT/TOC can
8190 // be optimized, eg.
8191 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8192 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8194 // addis ra,r2,0; addi rb,ra,x@toc@l;
8195 // to nop; addi rb,r2,x@toc;
8196 // FIXME: the @got sequence shown above is not yet
8197 // optimized. Note that gcc as of 2017-01-07 doesn't use
8198 // the ELF @got relocs except for TLS, instead using the
8199 // PowerOpen variant of a compiler managed GOT (called TOC).
8200 // The PowerOpen TOC sequence equivalent to the first
8201 // example is optimized.
8202 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8203 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8204 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8205 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8206 case elfcpp::R_POWERPC_GOT16_HA
:
8207 case elfcpp::R_PPC64_TOC16_HA
:
8208 if (parameters
->options().toc_optimize())
8210 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8211 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8212 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8213 && object
->make_toc_relative(target
, &value
))
8215 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8216 == ((15u << 26) | (2 << 16)));
8218 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8219 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8220 && value
+ 0x8000 < 0x10000)
8222 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8228 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8229 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8230 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8231 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8232 case elfcpp::R_POWERPC_GOT16_LO
:
8233 case elfcpp::R_PPC64_GOT16_LO_DS
:
8234 case elfcpp::R_PPC64_TOC16_LO
:
8235 case elfcpp::R_PPC64_TOC16_LO_DS
:
8236 if (parameters
->options().toc_optimize())
8238 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8239 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8240 bool changed
= false;
8241 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
8242 && object
->make_toc_relative(target
, &value
))
8244 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
8245 insn
^= (14u << 26) ^ (58u << 26);
8246 r_type
= elfcpp::R_PPC64_TOC16_LO
;
8249 if (ok_lo_toc_insn(insn
, r_type
)
8250 && value
+ 0x8000 < 0x10000)
8252 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
8254 // Transform addic to addi when we change reg.
8255 insn
&= ~((0x3f << 26) | (0x1f << 16));
8256 insn
|= (14u << 26) | (2 << 16);
8260 insn
&= ~(0x1f << 16);
8266 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8270 case elfcpp::R_PPC64_ENTRY
:
8271 value
= (target
->got_section()->output_section()->address()
8272 + object
->toc_base_offset());
8273 if (value
+ 0x80008000 <= 0xffffffff
8274 && !parameters
->options().output_is_position_independent())
8276 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8277 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8278 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8280 if ((insn1
& ~0xfffc) == ld_2_12
8281 && insn2
== add_2_2_12
)
8283 insn1
= lis_2
+ ha(value
);
8284 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8285 insn2
= addi_2_2
+ l(value
);
8286 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8293 if (value
+ 0x80008000 <= 0xffffffff)
8295 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8296 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8297 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8299 if ((insn1
& ~0xfffc) == ld_2_12
8300 && insn2
== add_2_2_12
)
8302 insn1
= addis_2_12
+ ha(value
);
8303 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8304 insn2
= addi_2_2
+ l(value
);
8305 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8312 case elfcpp::R_POWERPC_REL16_LO
:
8313 // If we are generating a non-PIC executable, edit
8314 // 0: addis 2,12,.TOC.-0b@ha
8315 // addi 2,2,.TOC.-0b@l
8316 // used by ELFv2 global entry points to set up r2, to
8319 // if .TOC. is in range. */
8320 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
8323 && target
->abiversion() >= 2
8324 && !parameters
->options().output_is_position_independent()
8325 && rela
.get_r_addend() == d_offset
+ 4
8327 && strcmp(gsym
->name(), ".TOC.") == 0)
8329 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8330 Reltype
prev_rela(preloc
- reloc_size
);
8331 if ((prev_rela
.get_r_info()
8332 == elfcpp::elf_r_info
<size
>(r_sym
,
8333 elfcpp::R_POWERPC_REL16_HA
))
8334 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
8335 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
8337 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8338 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
8339 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8341 if ((insn1
& 0xffff0000) == addis_2_12
8342 && (insn2
& 0xffff0000) == addi_2_2
)
8344 insn1
= lis_2
+ ha(value
+ address
- 4);
8345 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
8346 insn2
= addi_2_2
+ l(value
+ address
- 4);
8347 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
8350 relinfo
->rr
->set_strategy(relnum
- 1,
8351 Relocatable_relocs::RELOC_SPECIAL
);
8352 relinfo
->rr
->set_strategy(relnum
,
8353 Relocatable_relocs::RELOC_SPECIAL
);
8363 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
8364 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
8367 case elfcpp::R_POWERPC_ADDR32
:
8368 case elfcpp::R_POWERPC_UADDR32
:
8370 overflow
= Reloc::CHECK_BITFIELD
;
8373 case elfcpp::R_POWERPC_REL32
:
8374 case elfcpp::R_POWERPC_REL16DX_HA
:
8376 overflow
= Reloc::CHECK_SIGNED
;
8379 case elfcpp::R_POWERPC_UADDR16
:
8380 overflow
= Reloc::CHECK_BITFIELD
;
8383 case elfcpp::R_POWERPC_ADDR16
:
8384 // We really should have three separate relocations,
8385 // one for 16-bit data, one for insns with 16-bit signed fields,
8386 // and one for insns with 16-bit unsigned fields.
8387 overflow
= Reloc::CHECK_BITFIELD
;
8388 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
8389 overflow
= Reloc::CHECK_LOW_INSN
;
8392 case elfcpp::R_POWERPC_ADDR16_HI
:
8393 case elfcpp::R_POWERPC_ADDR16_HA
:
8394 case elfcpp::R_POWERPC_GOT16_HI
:
8395 case elfcpp::R_POWERPC_GOT16_HA
:
8396 case elfcpp::R_POWERPC_PLT16_HI
:
8397 case elfcpp::R_POWERPC_PLT16_HA
:
8398 case elfcpp::R_POWERPC_SECTOFF_HI
:
8399 case elfcpp::R_POWERPC_SECTOFF_HA
:
8400 case elfcpp::R_PPC64_TOC16_HI
:
8401 case elfcpp::R_PPC64_TOC16_HA
:
8402 case elfcpp::R_PPC64_PLTGOT16_HI
:
8403 case elfcpp::R_PPC64_PLTGOT16_HA
:
8404 case elfcpp::R_POWERPC_TPREL16_HI
:
8405 case elfcpp::R_POWERPC_TPREL16_HA
:
8406 case elfcpp::R_POWERPC_DTPREL16_HI
:
8407 case elfcpp::R_POWERPC_DTPREL16_HA
:
8408 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8409 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8410 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8411 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8412 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8413 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8414 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8415 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8416 case elfcpp::R_POWERPC_REL16_HI
:
8417 case elfcpp::R_POWERPC_REL16_HA
:
8419 overflow
= Reloc::CHECK_HIGH_INSN
;
8422 case elfcpp::R_POWERPC_REL16
:
8423 case elfcpp::R_PPC64_TOC16
:
8424 case elfcpp::R_POWERPC_GOT16
:
8425 case elfcpp::R_POWERPC_SECTOFF
:
8426 case elfcpp::R_POWERPC_TPREL16
:
8427 case elfcpp::R_POWERPC_DTPREL16
:
8428 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8429 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8430 case elfcpp::R_POWERPC_GOT_TPREL16
:
8431 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8432 overflow
= Reloc::CHECK_LOW_INSN
;
8435 case elfcpp::R_POWERPC_ADDR24
:
8436 case elfcpp::R_POWERPC_ADDR14
:
8437 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8438 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8439 case elfcpp::R_PPC64_ADDR16_DS
:
8440 case elfcpp::R_POWERPC_REL24
:
8441 case elfcpp::R_PPC_PLTREL24
:
8442 case elfcpp::R_PPC_LOCAL24PC
:
8443 case elfcpp::R_PPC64_TPREL16_DS
:
8444 case elfcpp::R_PPC64_DTPREL16_DS
:
8445 case elfcpp::R_PPC64_TOC16_DS
:
8446 case elfcpp::R_PPC64_GOT16_DS
:
8447 case elfcpp::R_PPC64_SECTOFF_DS
:
8448 case elfcpp::R_POWERPC_REL14
:
8449 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8450 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8451 overflow
= Reloc::CHECK_SIGNED
;
8455 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8458 if (overflow
== Reloc::CHECK_LOW_INSN
8459 || overflow
== Reloc::CHECK_HIGH_INSN
)
8461 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8463 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
8464 overflow
= Reloc::CHECK_BITFIELD
;
8465 else if (overflow
== Reloc::CHECK_LOW_INSN
8466 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
8467 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
8468 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
8469 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
8470 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
8471 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
8472 overflow
= Reloc::CHECK_UNSIGNED
;
8474 overflow
= Reloc::CHECK_SIGNED
;
8477 bool maybe_dq_reloc
= false;
8478 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
8479 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
8482 case elfcpp::R_POWERPC_NONE
:
8483 case elfcpp::R_POWERPC_TLS
:
8484 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
8485 case elfcpp::R_POWERPC_GNU_VTENTRY
:
8488 case elfcpp::R_PPC64_ADDR64
:
8489 case elfcpp::R_PPC64_REL64
:
8490 case elfcpp::R_PPC64_TOC
:
8491 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8492 Reloc::addr64(view
, value
);
8495 case elfcpp::R_POWERPC_TPREL
:
8496 case elfcpp::R_POWERPC_DTPREL
:
8498 Reloc::addr64(view
, value
);
8500 status
= Reloc::addr32(view
, value
, overflow
);
8503 case elfcpp::R_PPC64_UADDR64
:
8504 Reloc::addr64_u(view
, value
);
8507 case elfcpp::R_POWERPC_ADDR32
:
8508 status
= Reloc::addr32(view
, value
, overflow
);
8511 case elfcpp::R_POWERPC_REL32
:
8512 case elfcpp::R_POWERPC_UADDR32
:
8513 status
= Reloc::addr32_u(view
, value
, overflow
);
8516 case elfcpp::R_POWERPC_ADDR24
:
8517 case elfcpp::R_POWERPC_REL24
:
8518 case elfcpp::R_PPC_PLTREL24
:
8519 case elfcpp::R_PPC_LOCAL24PC
:
8520 status
= Reloc::addr24(view
, value
, overflow
);
8523 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8524 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8525 case elfcpp::R_POWERPC_GOT_TPREL16
:
8526 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8529 // On ppc64 these are all ds form
8530 maybe_dq_reloc
= true;
8534 case elfcpp::R_POWERPC_ADDR16
:
8535 case elfcpp::R_POWERPC_REL16
:
8536 case elfcpp::R_PPC64_TOC16
:
8537 case elfcpp::R_POWERPC_GOT16
:
8538 case elfcpp::R_POWERPC_SECTOFF
:
8539 case elfcpp::R_POWERPC_TPREL16
:
8540 case elfcpp::R_POWERPC_DTPREL16
:
8541 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8542 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8543 case elfcpp::R_POWERPC_ADDR16_LO
:
8544 case elfcpp::R_POWERPC_REL16_LO
:
8545 case elfcpp::R_PPC64_TOC16_LO
:
8546 case elfcpp::R_POWERPC_GOT16_LO
:
8547 case elfcpp::R_POWERPC_SECTOFF_LO
:
8548 case elfcpp::R_POWERPC_TPREL16_LO
:
8549 case elfcpp::R_POWERPC_DTPREL16_LO
:
8550 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8551 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8553 status
= Reloc::addr16(view
, value
, overflow
);
8555 maybe_dq_reloc
= true;
8558 case elfcpp::R_POWERPC_UADDR16
:
8559 status
= Reloc::addr16_u(view
, value
, overflow
);
8562 case elfcpp::R_PPC64_ADDR16_HIGH
:
8563 case elfcpp::R_PPC64_TPREL16_HIGH
:
8564 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8566 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
8569 case elfcpp::R_POWERPC_ADDR16_HI
:
8570 case elfcpp::R_POWERPC_REL16_HI
:
8571 case elfcpp::R_PPC64_TOC16_HI
:
8572 case elfcpp::R_POWERPC_GOT16_HI
:
8573 case elfcpp::R_POWERPC_SECTOFF_HI
:
8574 case elfcpp::R_POWERPC_TPREL16_HI
:
8575 case elfcpp::R_POWERPC_DTPREL16_HI
:
8576 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8577 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8578 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8579 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8580 Reloc::addr16_hi(view
, value
);
8583 case elfcpp::R_PPC64_ADDR16_HIGHA
:
8584 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8585 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8587 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
8590 case elfcpp::R_POWERPC_ADDR16_HA
:
8591 case elfcpp::R_POWERPC_REL16_HA
:
8592 case elfcpp::R_PPC64_TOC16_HA
:
8593 case elfcpp::R_POWERPC_GOT16_HA
:
8594 case elfcpp::R_POWERPC_SECTOFF_HA
:
8595 case elfcpp::R_POWERPC_TPREL16_HA
:
8596 case elfcpp::R_POWERPC_DTPREL16_HA
:
8597 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8598 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8599 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8600 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8601 Reloc::addr16_ha(view
, value
);
8604 case elfcpp::R_POWERPC_REL16DX_HA
:
8605 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
8608 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8610 // R_PPC_EMB_NADDR16_LO
8613 case elfcpp::R_PPC64_ADDR16_HIGHER
:
8614 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8615 Reloc::addr16_hi2(view
, value
);
8618 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8620 // R_PPC_EMB_NADDR16_HI
8623 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
8624 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8625 Reloc::addr16_ha2(view
, value
);
8628 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8630 // R_PPC_EMB_NADDR16_HA
8633 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
8634 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8635 Reloc::addr16_hi3(view
, value
);
8638 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8643 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
8644 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8645 Reloc::addr16_ha3(view
, value
);
8648 case elfcpp::R_PPC64_DTPREL16_DS
:
8649 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8651 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
8654 case elfcpp::R_PPC64_TPREL16_DS
:
8655 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8657 // R_PPC_TLSGD, R_PPC_TLSLD
8660 case elfcpp::R_PPC64_ADDR16_DS
:
8661 case elfcpp::R_PPC64_ADDR16_LO_DS
:
8662 case elfcpp::R_PPC64_TOC16_DS
:
8663 case elfcpp::R_PPC64_TOC16_LO_DS
:
8664 case elfcpp::R_PPC64_GOT16_DS
:
8665 case elfcpp::R_PPC64_GOT16_LO_DS
:
8666 case elfcpp::R_PPC64_SECTOFF_DS
:
8667 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8668 maybe_dq_reloc
= true;
8671 case elfcpp::R_POWERPC_ADDR14
:
8672 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8673 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8674 case elfcpp::R_POWERPC_REL14
:
8675 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8676 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8677 status
= Reloc::addr14(view
, value
, overflow
);
8680 case elfcpp::R_POWERPC_COPY
:
8681 case elfcpp::R_POWERPC_GLOB_DAT
:
8682 case elfcpp::R_POWERPC_JMP_SLOT
:
8683 case elfcpp::R_POWERPC_RELATIVE
:
8684 case elfcpp::R_POWERPC_DTPMOD
:
8685 case elfcpp::R_PPC64_JMP_IREL
:
8686 case elfcpp::R_POWERPC_IRELATIVE
:
8687 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8688 _("unexpected reloc %u in object file"),
8692 case elfcpp::R_PPC_EMB_SDA21
:
8697 // R_PPC64_TOCSAVE. For the time being this can be ignored.
8701 case elfcpp::R_PPC_EMB_SDA2I16
:
8702 case elfcpp::R_PPC_EMB_SDA2REL
:
8705 // R_PPC64_TLSGD, R_PPC64_TLSLD
8708 case elfcpp::R_POWERPC_PLT32
:
8709 case elfcpp::R_POWERPC_PLTREL32
:
8710 case elfcpp::R_POWERPC_PLT16_LO
:
8711 case elfcpp::R_POWERPC_PLT16_HI
:
8712 case elfcpp::R_POWERPC_PLT16_HA
:
8713 case elfcpp::R_PPC_SDAREL16
:
8714 case elfcpp::R_POWERPC_ADDR30
:
8715 case elfcpp::R_PPC64_PLT64
:
8716 case elfcpp::R_PPC64_PLTREL64
:
8717 case elfcpp::R_PPC64_PLTGOT16
:
8718 case elfcpp::R_PPC64_PLTGOT16_LO
:
8719 case elfcpp::R_PPC64_PLTGOT16_HI
:
8720 case elfcpp::R_PPC64_PLTGOT16_HA
:
8721 case elfcpp::R_PPC64_PLT16_LO_DS
:
8722 case elfcpp::R_PPC64_PLTGOT16_DS
:
8723 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
8724 case elfcpp::R_PPC_EMB_RELSDA
:
8725 case elfcpp::R_PPC_TOC16
:
8728 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8729 _("unsupported reloc %u"),
8737 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8739 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
8740 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8741 && (insn
& 3) == 1))
8742 status
= Reloc::addr16_dq(view
, value
, overflow
);
8744 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8745 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8746 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
8747 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
8748 status
= Reloc::addr16_ds(view
, value
, overflow
);
8750 status
= Reloc::addr16(view
, value
, overflow
);
8753 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
8756 && gsym
->is_undefined()
8757 && is_branch_reloc(r_type
))))
8759 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8760 _("relocation overflow"));
8762 gold_info(_("try relinking with a smaller --stub-group-size"));
8768 // Relocate section data.
8770 template<int size
, bool big_endian
>
8772 Target_powerpc
<size
, big_endian
>::relocate_section(
8773 const Relocate_info
<size
, big_endian
>* relinfo
,
8774 unsigned int sh_type
,
8775 const unsigned char* prelocs
,
8777 Output_section
* output_section
,
8778 bool needs_special_offset_handling
,
8779 unsigned char* view
,
8781 section_size_type view_size
,
8782 const Reloc_symbol_changes
* reloc_symbol_changes
)
8784 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8785 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8786 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8787 Powerpc_comdat_behavior
;
8788 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8791 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8793 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
8794 Powerpc_comdat_behavior
, Classify_reloc
>(
8800 needs_special_offset_handling
,
8804 reloc_symbol_changes
);
8807 template<int size
, bool big_endian
>
8808 class Powerpc_scan_relocatable_reloc
8811 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8812 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8813 static const int sh_type
= elfcpp::SHT_RELA
;
8815 // Return the symbol referred to by the relocation.
8816 static inline unsigned int
8817 get_r_sym(const Reltype
* reloc
)
8818 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
8820 // Return the type of the relocation.
8821 static inline unsigned int
8822 get_r_type(const Reltype
* reloc
)
8823 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
8825 // Return the strategy to use for a local symbol which is not a
8826 // section symbol, given the relocation type.
8827 inline Relocatable_relocs::Reloc_strategy
8828 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8830 if (r_type
== 0 && r_sym
== 0)
8831 return Relocatable_relocs::RELOC_DISCARD
;
8832 return Relocatable_relocs::RELOC_COPY
;
8835 // Return the strategy to use for a local symbol which is a section
8836 // symbol, given the relocation type.
8837 inline Relocatable_relocs::Reloc_strategy
8838 local_section_strategy(unsigned int, Relobj
*)
8840 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8843 // Return the strategy to use for a global symbol, given the
8844 // relocation type, the object, and the symbol index.
8845 inline Relocatable_relocs::Reloc_strategy
8846 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8848 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8849 return Relocatable_relocs::RELOC_SPECIAL
;
8850 return Relocatable_relocs::RELOC_COPY
;
8854 // Scan the relocs during a relocatable link.
8856 template<int size
, bool big_endian
>
8858 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8859 Symbol_table
* symtab
,
8861 Sized_relobj_file
<size
, big_endian
>* object
,
8862 unsigned int data_shndx
,
8863 unsigned int sh_type
,
8864 const unsigned char* prelocs
,
8866 Output_section
* output_section
,
8867 bool needs_special_offset_handling
,
8868 size_t local_symbol_count
,
8869 const unsigned char* plocal_symbols
,
8870 Relocatable_relocs
* rr
)
8872 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
8874 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8876 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
8884 needs_special_offset_handling
,
8890 // Scan the relocs for --emit-relocs.
8892 template<int size
, bool big_endian
>
8894 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
8895 Symbol_table
* symtab
,
8897 Sized_relobj_file
<size
, big_endian
>* object
,
8898 unsigned int data_shndx
,
8899 unsigned int sh_type
,
8900 const unsigned char* prelocs
,
8902 Output_section
* output_section
,
8903 bool needs_special_offset_handling
,
8904 size_t local_symbol_count
,
8905 const unsigned char* plocal_syms
,
8906 Relocatable_relocs
* rr
)
8908 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8910 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
8911 Emit_relocs_strategy
;
8913 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8915 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
8923 needs_special_offset_handling
,
8929 // Emit relocations for a section.
8930 // This is a modified version of the function by the same name in
8931 // target-reloc.h. Using relocate_special_relocatable for
8932 // R_PPC_PLTREL24 would require duplication of the entire body of the
8933 // loop, so we may as well duplicate the whole thing.
8935 template<int size
, bool big_endian
>
8937 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8938 const Relocate_info
<size
, big_endian
>* relinfo
,
8939 unsigned int sh_type
,
8940 const unsigned char* prelocs
,
8942 Output_section
* output_section
,
8943 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8945 Address view_address
,
8947 unsigned char* reloc_view
,
8948 section_size_type reloc_view_size
)
8950 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8952 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8953 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
8954 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8955 // Offset from start of insn to d-field reloc.
8956 const int d_offset
= big_endian
? 2 : 0;
8958 Powerpc_relobj
<size
, big_endian
>* const object
8959 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8960 const unsigned int local_count
= object
->local_symbol_count();
8961 unsigned int got2_shndx
= object
->got2_shndx();
8962 Address got2_addend
= 0;
8963 if (got2_shndx
!= 0)
8965 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8966 gold_assert(got2_addend
!= invalid_address
);
8969 unsigned char* pwrite
= reloc_view
;
8970 bool zap_next
= false;
8971 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8973 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
8974 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8977 Reltype
reloc(prelocs
);
8978 Reltype_write
reloc_write(pwrite
);
8980 Address offset
= reloc
.get_r_offset();
8981 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8982 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8983 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8984 const unsigned int orig_r_sym
= r_sym
;
8985 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8986 = reloc
.get_r_addend();
8987 const Symbol
* gsym
= NULL
;
8991 // We could arrange to discard these and other relocs for
8992 // tls optimised sequences in the strategy methods, but for
8993 // now do as BFD ld does.
8994 r_type
= elfcpp::R_POWERPC_NONE
;
8998 // Get the new symbol index.
8999 Output_section
* os
= NULL
;
9000 if (r_sym
< local_count
)
9004 case Relocatable_relocs::RELOC_COPY
:
9005 case Relocatable_relocs::RELOC_SPECIAL
:
9008 r_sym
= object
->symtab_index(r_sym
);
9009 gold_assert(r_sym
!= -1U);
9013 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9015 // We are adjusting a section symbol. We need to find
9016 // the symbol table index of the section symbol for
9017 // the output section corresponding to input section
9018 // in which this symbol is defined.
9019 gold_assert(r_sym
< local_count
);
9021 unsigned int shndx
=
9022 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9023 gold_assert(is_ordinary
);
9024 os
= object
->output_section(shndx
);
9025 gold_assert(os
!= NULL
);
9026 gold_assert(os
->needs_symtab_index());
9027 r_sym
= os
->symtab_index();
9037 gsym
= object
->global_symbol(r_sym
);
9038 gold_assert(gsym
!= NULL
);
9039 if (gsym
->is_forwarder())
9040 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9042 gold_assert(gsym
->has_symtab_index());
9043 r_sym
= gsym
->symtab_index();
9046 // Get the new offset--the location in the output section where
9047 // this relocation should be applied.
9048 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9049 offset
+= offset_in_output_section
;
9052 section_offset_type sot_offset
=
9053 convert_types
<section_offset_type
, Address
>(offset
);
9054 section_offset_type new_sot_offset
=
9055 output_section
->output_offset(object
, relinfo
->data_shndx
,
9057 gold_assert(new_sot_offset
!= -1);
9058 offset
= new_sot_offset
;
9061 // In an object file, r_offset is an offset within the section.
9062 // In an executable or dynamic object, generated by
9063 // --emit-relocs, r_offset is an absolute address.
9064 if (!parameters
->options().relocatable())
9066 offset
+= view_address
;
9067 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9068 offset
-= offset_in_output_section
;
9071 // Handle the reloc addend based on the strategy.
9072 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9074 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9076 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9077 gold_assert(os
!= NULL
);
9078 addend
= psymval
->value(object
, addend
) - os
->address();
9080 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9084 if (addend
>= 32768)
9085 addend
+= got2_addend
;
9087 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9089 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9092 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9094 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9095 addend
-= d_offset
+ 4;
9101 if (!parameters
->options().relocatable())
9103 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9104 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9105 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9106 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9108 // First instruction of a global dynamic sequence,
9110 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9111 switch (this->optimize_tls_gd(final
))
9113 case tls::TLSOPT_TO_IE
:
9114 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9115 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9117 case tls::TLSOPT_TO_LE
:
9118 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9119 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9120 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9123 r_type
= elfcpp::R_POWERPC_NONE
;
9131 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9132 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9133 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9134 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9136 // First instruction of a local dynamic sequence,
9138 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9140 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9141 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9143 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9144 const Output_section
* os
= relinfo
->layout
->tls_segment()
9146 gold_assert(os
!= NULL
);
9147 gold_assert(os
->needs_symtab_index());
9148 r_sym
= os
->symtab_index();
9149 addend
= dtp_offset
;
9153 r_type
= elfcpp::R_POWERPC_NONE
;
9158 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9159 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9160 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9161 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9163 // First instruction of initial exec sequence.
9164 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9165 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9167 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9168 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9169 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9172 r_type
= elfcpp::R_POWERPC_NONE
;
9177 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9178 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9180 // Second instruction of a global dynamic sequence,
9181 // the __tls_get_addr call
9182 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9183 switch (this->optimize_tls_gd(final
))
9185 case tls::TLSOPT_TO_IE
:
9186 r_type
= elfcpp::R_POWERPC_NONE
;
9189 case tls::TLSOPT_TO_LE
:
9190 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9198 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
9199 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
9201 // Second instruction of a local dynamic sequence,
9202 // the __tls_get_addr call
9203 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9205 const Output_section
* os
= relinfo
->layout
->tls_segment()
9207 gold_assert(os
!= NULL
);
9208 gold_assert(os
->needs_symtab_index());
9209 r_sym
= os
->symtab_index();
9210 addend
= dtp_offset
;
9211 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9216 else if (r_type
== elfcpp::R_POWERPC_TLS
)
9218 // Second instruction of an initial exec sequence
9219 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9220 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9222 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9228 reloc_write
.put_r_offset(offset
);
9229 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
9230 reloc_write
.put_r_addend(addend
);
9232 pwrite
+= reloc_size
;
9235 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
9236 == reloc_view_size
);
9239 // Return the value to use for a dynamic symbol which requires special
9240 // treatment. This is how we support equality comparisons of function
9241 // pointers across shared library boundaries, as described in the
9242 // processor specific ABI supplement.
9244 template<int size
, bool big_endian
>
9246 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
9250 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
9251 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9252 p
!= this->stub_tables_
.end();
9255 Address off
= (*p
)->find_plt_call_entry(gsym
);
9256 if (off
!= invalid_address
)
9257 return (*p
)->stub_address() + off
;
9260 else if (this->abiversion() >= 2)
9262 Address off
= this->glink_section()->find_global_entry(gsym
);
9263 if (off
!= invalid_address
)
9264 return this->glink_section()->global_entry_address() + off
;
9269 // Return the PLT address to use for a local symbol.
9270 template<int size
, bool big_endian
>
9272 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
9273 const Relobj
* object
,
9274 unsigned int symndx
) const
9278 const Sized_relobj
<size
, big_endian
>* relobj
9279 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
9280 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9281 p
!= this->stub_tables_
.end();
9284 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
9286 if (off
!= invalid_address
)
9287 return (*p
)->stub_address() + off
;
9293 // Return the PLT address to use for a global symbol.
9294 template<int size
, bool big_endian
>
9296 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
9297 const Symbol
* gsym
) const
9301 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9302 p
!= this->stub_tables_
.end();
9305 Address off
= (*p
)->find_plt_call_entry(gsym
);
9306 if (off
!= invalid_address
)
9307 return (*p
)->stub_address() + off
;
9310 else if (this->abiversion() >= 2)
9312 Address off
= this->glink_section()->find_global_entry(gsym
);
9313 if (off
!= invalid_address
)
9314 return this->glink_section()->global_entry_address() + off
;
9319 // Return the offset to use for the GOT_INDX'th got entry which is
9320 // for a local tls symbol specified by OBJECT, SYMNDX.
9321 template<int size
, bool big_endian
>
9323 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
9324 const Relobj
* object
,
9325 unsigned int symndx
,
9326 unsigned int got_indx
) const
9328 const Powerpc_relobj
<size
, big_endian
>* ppc_object
9329 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
9330 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
9332 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9333 got_type
<= GOT_TYPE_TPREL
;
9334 got_type
= Got_type(got_type
+ 1))
9335 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
9337 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
9338 if (got_type
== GOT_TYPE_TLSGD
)
9340 if (off
== got_indx
* (size
/ 8))
9342 if (got_type
== GOT_TYPE_TPREL
)
9352 // Return the offset to use for the GOT_INDX'th got entry which is
9353 // for global tls symbol GSYM.
9354 template<int size
, bool big_endian
>
9356 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
9358 unsigned int got_indx
) const
9360 if (gsym
->type() == elfcpp::STT_TLS
)
9362 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9363 got_type
<= GOT_TYPE_TPREL
;
9364 got_type
= Got_type(got_type
+ 1))
9365 if (gsym
->has_got_offset(got_type
))
9367 unsigned int off
= gsym
->got_offset(got_type
);
9368 if (got_type
== GOT_TYPE_TLSGD
)
9370 if (off
== got_indx
* (size
/ 8))
9372 if (got_type
== GOT_TYPE_TPREL
)
9382 // The selector for powerpc object files.
9384 template<int size
, bool big_endian
>
9385 class Target_selector_powerpc
: public Target_selector
9388 Target_selector_powerpc()
9389 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
9392 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
9393 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
9395 ? (big_endian
? "elf64ppc" : "elf64lppc")
9396 : (big_endian
? "elf32ppc" : "elf32lppc")))
9400 do_instantiate_target()
9401 { return new Target_powerpc
<size
, big_endian
>(); }
9404 Target_selector_powerpc
<32, true> target_selector_ppc32
;
9405 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
9406 Target_selector_powerpc
<64, true> target_selector_ppc64
;
9407 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
9409 // Instantiate these constants for -O0
9410 template<int size
, bool big_endian
>
9411 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
9412 template<int size
, bool big_endian
>
9413 const typename Output_data_glink
<size
, big_endian
>::Address
9414 Output_data_glink
<size
, big_endian
>::invalid_address
;
9415 template<int size
, bool big_endian
>
9416 const typename Stub_table
<size
, big_endian
>::Address
9417 Stub_table
<size
, big_endian
>::invalid_address
;
9418 template<int size
, bool big_endian
>
9419 const typename Target_powerpc
<size
, big_endian
>::Address
9420 Target_powerpc
<size
, big_endian
>::invalid_address
;
9422 } // End anonymous namespace.