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 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3613 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3615 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3619 // A section for huge long branch addresses, similar to plt section.
3621 template<int size
, bool big_endian
>
3622 class Output_data_brlt_powerpc
: public Output_section_data_build
3625 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3626 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3627 size
, big_endian
> Reloc_section
;
3629 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3630 Reloc_section
* brlt_rel
)
3631 : Output_section_data_build(size
== 32 ? 4 : 8),
3639 this->reset_data_size();
3640 this->rel_
->reset_data_size();
3644 finalize_brlt_sizes()
3646 this->finalize_data_size();
3647 this->rel_
->finalize_data_size();
3650 // Add a reloc for an entry in the BRLT.
3652 add_reloc(Address to
, unsigned int off
)
3653 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3655 // Update section and reloc section size.
3657 set_current_size(unsigned int num_branches
)
3659 this->reset_address_and_file_offset();
3660 this->set_current_data_size(num_branches
* 16);
3661 this->finalize_data_size();
3662 Output_section
* os
= this->output_section();
3663 os
->set_section_offsets_need_adjustment();
3664 if (this->rel_
!= NULL
)
3666 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3667 this->rel_
->reset_address_and_file_offset();
3668 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3669 this->rel_
->finalize_data_size();
3670 Output_section
* os
= this->rel_
->output_section();
3671 os
->set_section_offsets_need_adjustment();
3677 do_adjust_output_section(Output_section
* os
)
3682 // Write to a map file.
3684 do_print_to_mapfile(Mapfile
* mapfile
) const
3685 { mapfile
->print_output_data(this, "** BRLT"); }
3688 // Write out the BRLT data.
3690 do_write(Output_file
*);
3692 // The reloc section.
3693 Reloc_section
* rel_
;
3694 Target_powerpc
<size
, big_endian
>* targ_
;
3697 // Make the branch lookup table section.
3699 template<int size
, bool big_endian
>
3701 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3703 if (size
== 64 && this->brlt_section_
== NULL
)
3705 Reloc_section
* brlt_rel
= NULL
;
3706 bool is_pic
= parameters
->options().output_is_position_independent();
3709 // When PIC we can't fill in .branch_lt (like .plt it can be
3710 // a bss style section) but must initialise at runtime via
3711 // dynamic relocats.
3712 this->rela_dyn_section(layout
);
3713 brlt_rel
= new Reloc_section(false);
3714 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3717 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3718 if (this->plt_
&& is_pic
)
3719 this->plt_
->output_section()
3720 ->add_output_section_data(this->brlt_section_
);
3722 layout
->add_output_section_data(".branch_lt",
3723 (is_pic
? elfcpp::SHT_NOBITS
3724 : elfcpp::SHT_PROGBITS
),
3725 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3726 this->brlt_section_
,
3727 (is_pic
? ORDER_SMALL_BSS
3728 : ORDER_SMALL_DATA
),
3733 // Write out .branch_lt when non-PIC.
3735 template<int size
, bool big_endian
>
3737 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3739 if (size
== 64 && !parameters
->options().output_is_position_independent())
3741 const section_size_type offset
= this->offset();
3742 const section_size_type oview_size
3743 = convert_to_section_size_type(this->data_size());
3744 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3746 this->targ_
->write_branch_lookup_table(oview
);
3747 of
->write_output_view(offset
, oview_size
, oview
);
3751 static inline uint32_t
3757 static inline uint32_t
3763 static inline uint32_t
3766 return hi(a
+ 0x8000);
3772 static const unsigned char eh_frame_cie
[12];
3776 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3779 'z', 'R', 0, // Augmentation string.
3780 4, // Code alignment.
3781 0x80 - size
/ 8 , // Data alignment.
3783 1, // Augmentation size.
3784 (elfcpp::DW_EH_PE_pcrel
3785 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3786 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3789 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3790 static const unsigned char glink_eh_frame_fde_64v1
[] =
3792 0, 0, 0, 0, // Replaced with offset to .glink.
3793 0, 0, 0, 0, // Replaced with size of .glink.
3794 0, // Augmentation size.
3795 elfcpp::DW_CFA_advance_loc
+ 1,
3796 elfcpp::DW_CFA_register
, 65, 12,
3797 elfcpp::DW_CFA_advance_loc
+ 4,
3798 elfcpp::DW_CFA_restore_extended
, 65
3801 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3802 static const unsigned char glink_eh_frame_fde_64v2
[] =
3804 0, 0, 0, 0, // Replaced with offset to .glink.
3805 0, 0, 0, 0, // Replaced with size of .glink.
3806 0, // Augmentation size.
3807 elfcpp::DW_CFA_advance_loc
+ 1,
3808 elfcpp::DW_CFA_register
, 65, 0,
3809 elfcpp::DW_CFA_advance_loc
+ 4,
3810 elfcpp::DW_CFA_restore_extended
, 65
3813 // Describe __glink_PLTresolve use of LR, 32-bit version.
3814 static const unsigned char glink_eh_frame_fde_32
[] =
3816 0, 0, 0, 0, // Replaced with offset to .glink.
3817 0, 0, 0, 0, // Replaced with size of .glink.
3818 0, // Augmentation size.
3819 elfcpp::DW_CFA_advance_loc
+ 2,
3820 elfcpp::DW_CFA_register
, 65, 0,
3821 elfcpp::DW_CFA_advance_loc
+ 4,
3822 elfcpp::DW_CFA_restore_extended
, 65
3825 static const unsigned char default_fde
[] =
3827 0, 0, 0, 0, // Replaced with offset to stubs.
3828 0, 0, 0, 0, // Replaced with size of stubs.
3829 0, // Augmentation size.
3830 elfcpp::DW_CFA_nop
, // Pad.
3835 template<bool big_endian
>
3837 write_insn(unsigned char* p
, uint32_t v
)
3839 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3842 // Stub_table holds information about plt and long branch stubs.
3843 // Stubs are built in an area following some input section determined
3844 // by group_sections(). This input section is converted to a relaxed
3845 // input section allowing it to be resized to accommodate the stubs
3847 template<int size
, bool big_endian
>
3848 class Stub_table
: public Output_relaxed_input_section
3851 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3852 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3854 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3855 Output_section
* output_section
,
3856 const Output_section::Input_section
* owner
)
3857 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3859 ->section_addralign(owner
->shndx())),
3860 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3861 orig_data_size_(owner
->current_data_size()),
3862 plt_size_(0), last_plt_size_(0),
3863 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
3864 eh_frame_added_(false), need_save_res_(false)
3866 this->set_output_section(output_section
);
3868 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3869 new_relaxed
.push_back(this);
3870 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3873 // Add a plt call stub.
3875 add_plt_call_entry(Address
,
3876 const Sized_relobj_file
<size
, big_endian
>*,
3882 add_plt_call_entry(Address
,
3883 const Sized_relobj_file
<size
, big_endian
>*,
3888 // Find a given plt call stub.
3890 find_plt_call_entry(const Symbol
*) const;
3893 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3894 unsigned int) const;
3897 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3903 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3908 // Add a long branch stub.
3910 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3911 unsigned int, Address
, Address
, bool);
3914 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3918 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3920 Address max_branch_offset
= max_branch_delta(r_type
);
3921 if (max_branch_offset
== 0)
3923 gold_assert(from
!= invalid_address
);
3924 Address loc
= off
+ this->stub_address();
3925 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3929 clear_stubs(bool all
)
3931 this->plt_call_stubs_
.clear();
3932 this->plt_size_
= 0;
3933 this->long_branch_stubs_
.clear();
3934 this->branch_size_
= 0;
3935 this->need_save_res_
= false;
3938 this->last_plt_size_
= 0;
3939 this->last_branch_size_
= 0;
3944 set_address_and_size(const Output_section
* os
, Address off
)
3946 Address start_off
= off
;
3947 off
+= this->orig_data_size_
;
3948 Address my_size
= this->plt_size_
+ this->branch_size_
;
3949 if (this->need_save_res_
)
3950 my_size
+= this->targ_
->savres_section()->data_size();
3952 off
= align_address(off
, this->stub_align());
3953 // Include original section size and alignment padding in size
3954 my_size
+= off
- start_off
;
3955 // Ensure new size is always larger than min size
3956 // threshold. Alignment requirement is included in "my_size", so
3957 // increase "my_size" does not invalidate alignment.
3958 if (my_size
< this->min_size_threshold_
)
3959 my_size
= this->min_size_threshold_
;
3960 this->reset_address_and_file_offset();
3961 this->set_current_data_size(my_size
);
3962 this->set_address_and_file_offset(os
->address() + start_off
,
3963 os
->offset() + start_off
);
3968 stub_address() const
3970 return align_address(this->address() + this->orig_data_size_
,
3971 this->stub_align());
3977 return align_address(this->offset() + this->orig_data_size_
,
3978 this->stub_align());
3983 { return this->plt_size_
; }
3985 void set_min_size_threshold(Address min_size
)
3986 { this->min_size_threshold_
= min_size
; }
3991 Output_section
* os
= this->output_section();
3992 if (os
->addralign() < this->stub_align())
3994 os
->set_addralign(this->stub_align());
3995 // FIXME: get rid of the insane checkpointing.
3996 // We can't increase alignment of the input section to which
3997 // stubs are attached; The input section may be .init which
3998 // is pasted together with other .init sections to form a
3999 // function. Aligning might insert zero padding resulting in
4000 // sigill. However we do need to increase alignment of the
4001 // output section so that the align_address() on offset in
4002 // set_address_and_size() adds the same padding as the
4003 // align_address() on address in stub_address().
4004 // What's more, we need this alignment for the layout done in
4005 // relaxation_loop_body() so that the output section starts at
4006 // a suitably aligned address.
4007 os
->checkpoint_set_addralign(this->stub_align());
4009 if (this->last_plt_size_
!= this->plt_size_
4010 || this->last_branch_size_
!= this->branch_size_
)
4012 this->last_plt_size_
= this->plt_size_
;
4013 this->last_branch_size_
= this->branch_size_
;
4019 // Add .eh_frame info for this stub section. Unlike other linker
4020 // generated .eh_frame this is added late in the link, because we
4021 // only want the .eh_frame info if this particular stub section is
4024 add_eh_frame(Layout
* layout
)
4026 if (!this->eh_frame_added_
)
4028 if (!parameters
->options().ld_generated_unwind_info())
4031 // Since we add stub .eh_frame info late, it must be placed
4032 // after all other linker generated .eh_frame info so that
4033 // merge mapping need not be updated for input sections.
4034 // There is no provision to use a different CIE to that used
4036 if (!this->targ_
->has_glink())
4039 layout
->add_eh_frame_for_plt(this,
4040 Eh_cie
<size
>::eh_frame_cie
,
4041 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4043 sizeof (default_fde
));
4044 this->eh_frame_added_
= true;
4048 Target_powerpc
<size
, big_endian
>*
4054 class Plt_stub_ent_hash
;
4055 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
4056 Plt_stub_ent_hash
> Plt_stub_entries
;
4058 // Alignment of stub section.
4064 unsigned int min_align
= 32;
4065 unsigned int user_align
= 1 << parameters
->options().plt_align();
4066 return std::max(user_align
, min_align
);
4069 // Return the plt offset for the given call stub.
4071 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4073 const Symbol
* gsym
= p
->first
.sym_
;
4076 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4077 && gsym
->can_use_relative_reloc(false));
4078 return gsym
->plt_offset();
4083 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4084 unsigned int local_sym_index
= p
->first
.locsym_
;
4085 return relobj
->local_plt_offset(local_sym_index
);
4089 // Size of a given plt call stub.
4091 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4097 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4099 plt_addr
+= this->targ_
->iplt_section()->address();
4101 plt_addr
+= this->targ_
->plt_section()->address();
4102 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4103 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4104 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4105 got_addr
+= ppcobj
->toc_base_offset();
4106 Address off
= plt_addr
- got_addr
;
4107 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4108 if (this->targ_
->abiversion() < 2)
4110 bool static_chain
= parameters
->options().plt_static_chain();
4111 bool thread_safe
= this->targ_
->plt_thread_safe();
4115 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4117 unsigned int align
= 1 << parameters
->options().plt_align();
4119 bytes
= (bytes
+ align
- 1) & -align
;
4123 // Return long branch stub size.
4125 branch_stub_size(Address to
)
4128 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
4129 if (to
- loc
+ (1 << 25) < 2 << 25)
4131 if (size
== 64 || !parameters
->options().output_is_position_independent())
4138 do_write(Output_file
*);
4140 // Plt call stub keys.
4144 Plt_stub_ent(const Symbol
* sym
)
4145 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4148 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4149 unsigned int locsym_index
)
4150 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4153 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4155 unsigned int r_type
,
4157 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4160 this->addend_
= addend
;
4161 else if (parameters
->options().output_is_position_independent()
4162 && r_type
== elfcpp::R_PPC_PLTREL24
)
4164 this->addend_
= addend
;
4165 if (this->addend_
>= 32768)
4166 this->object_
= object
;
4170 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4171 unsigned int locsym_index
,
4172 unsigned int r_type
,
4174 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4177 this->addend_
= addend
;
4178 else if (parameters
->options().output_is_position_independent()
4179 && r_type
== elfcpp::R_PPC_PLTREL24
)
4180 this->addend_
= addend
;
4183 bool operator==(const Plt_stub_ent
& that
) const
4185 return (this->sym_
== that
.sym_
4186 && this->object_
== that
.object_
4187 && this->addend_
== that
.addend_
4188 && this->locsym_
== that
.locsym_
);
4192 const Sized_relobj_file
<size
, big_endian
>* object_
;
4193 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4194 unsigned int locsym_
;
4197 class Plt_stub_ent_hash
4200 size_t operator()(const Plt_stub_ent
& ent
) const
4202 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4203 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4209 // Long branch stub keys.
4210 class Branch_stub_ent
4213 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4214 Address to
, bool save_res
)
4215 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4218 toc_base_off_
= obj
->toc_base_offset();
4221 bool operator==(const Branch_stub_ent
& that
) const
4223 return (this->dest_
== that
.dest_
4225 || this->toc_base_off_
== that
.toc_base_off_
));
4229 unsigned int toc_base_off_
;
4233 class Branch_stub_ent_hash
4236 size_t operator()(const Branch_stub_ent
& ent
) const
4237 { return ent
.dest_
^ ent
.toc_base_off_
; }
4240 // In a sane world this would be a global.
4241 Target_powerpc
<size
, big_endian
>* targ_
;
4242 // Map sym/object/addend to stub offset.
4243 Plt_stub_entries plt_call_stubs_
;
4244 // Map destination address to stub offset.
4245 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4246 Branch_stub_ent_hash
> Branch_stub_entries
;
4247 Branch_stub_entries long_branch_stubs_
;
4248 // size of input section
4249 section_size_type orig_data_size_
;
4251 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4252 // Some rare cases cause (PR/20529) fluctuation in stub table
4253 // size, which leads to an endless relax loop. This is to be fixed
4254 // by, after the first few iterations, allowing only increase of
4255 // stub table size. This variable sets the minimal possible size of
4256 // a stub table, it is zero for the first few iterations, then
4257 // increases monotonically.
4258 Address min_size_threshold_
;
4259 // Whether .eh_frame info has been created for this stub section.
4260 bool eh_frame_added_
;
4261 // Set if this stub group needs a copy of out-of-line register
4262 // save/restore functions.
4263 bool need_save_res_
;
4266 // Add a plt call stub, if we do not already have one for this
4267 // sym/object/addend combo.
4269 template<int size
, bool big_endian
>
4271 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4273 const Sized_relobj_file
<size
, big_endian
>* object
,
4275 unsigned int r_type
,
4278 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4279 unsigned int off
= this->plt_size_
;
4280 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4281 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4283 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4284 return this->can_reach_stub(from
, off
, r_type
);
4287 template<int size
, bool big_endian
>
4289 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4291 const Sized_relobj_file
<size
, big_endian
>* object
,
4292 unsigned int locsym_index
,
4293 unsigned int r_type
,
4296 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4297 unsigned int off
= this->plt_size_
;
4298 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4299 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4301 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4302 return this->can_reach_stub(from
, off
, r_type
);
4305 // Find a plt call stub.
4307 template<int size
, bool big_endian
>
4308 typename Stub_table
<size
, big_endian
>::Address
4309 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4310 const Sized_relobj_file
<size
, big_endian
>* object
,
4312 unsigned int r_type
,
4313 Address addend
) const
4315 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4316 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4317 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4320 template<int size
, bool big_endian
>
4321 typename Stub_table
<size
, big_endian
>::Address
4322 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4324 Plt_stub_ent
ent(gsym
);
4325 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4326 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4329 template<int size
, bool big_endian
>
4330 typename Stub_table
<size
, big_endian
>::Address
4331 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4332 const Sized_relobj_file
<size
, big_endian
>* object
,
4333 unsigned int locsym_index
,
4334 unsigned int r_type
,
4335 Address addend
) const
4337 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4338 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4339 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4342 template<int size
, bool big_endian
>
4343 typename Stub_table
<size
, big_endian
>::Address
4344 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4345 const Sized_relobj_file
<size
, big_endian
>* object
,
4346 unsigned int locsym_index
) const
4348 Plt_stub_ent
ent(object
, locsym_index
);
4349 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4350 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4353 // Add a long branch stub if we don't already have one to given
4356 template<int size
, bool big_endian
>
4358 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4359 const Powerpc_relobj
<size
, big_endian
>* object
,
4360 unsigned int r_type
,
4365 Branch_stub_ent
ent(object
, to
, save_res
);
4366 Address off
= this->branch_size_
;
4367 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4370 this->need_save_res_
= true;
4373 unsigned int stub_size
= this->branch_stub_size(to
);
4374 this->branch_size_
= off
+ stub_size
;
4375 if (size
== 64 && stub_size
!= 4)
4376 this->targ_
->add_branch_lookup_table(to
);
4379 return this->can_reach_stub(from
, off
, r_type
);
4382 // Find long branch stub offset.
4384 template<int size
, bool big_endian
>
4385 typename Stub_table
<size
, big_endian
>::Address
4386 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4387 const Powerpc_relobj
<size
, big_endian
>* object
,
4390 Branch_stub_ent
ent(object
, to
, false);
4391 typename
Branch_stub_entries::const_iterator p
4392 = this->long_branch_stubs_
.find(ent
);
4393 if (p
== this->long_branch_stubs_
.end())
4394 return invalid_address
;
4395 if (p
->first
.save_res_
)
4396 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4400 // A class to handle .glink.
4402 template<int size
, bool big_endian
>
4403 class Output_data_glink
: public Output_section_data
4406 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4407 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4408 static const int pltresolve_size
= 16*4;
4410 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4411 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4412 end_branch_table_(), ge_size_(0)
4416 add_eh_frame(Layout
* layout
);
4419 add_global_entry(const Symbol
*);
4422 find_global_entry(const Symbol
*) const;
4425 global_entry_address() const
4427 gold_assert(this->is_data_size_valid());
4428 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4429 return this->address() + global_entry_off
;
4433 // Write to a map file.
4435 do_print_to_mapfile(Mapfile
* mapfile
) const
4436 { mapfile
->print_output_data(this, _("** glink")); }
4440 set_final_data_size();
4444 do_write(Output_file
*);
4446 // Allows access to .got and .plt for do_write.
4447 Target_powerpc
<size
, big_endian
>* targ_
;
4449 // Map sym to stub offset.
4450 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4451 Global_entry_stub_entries global_entry_stubs_
;
4453 unsigned int end_branch_table_
, ge_size_
;
4456 template<int size
, bool big_endian
>
4458 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4460 if (!parameters
->options().ld_generated_unwind_info())
4465 if (this->targ_
->abiversion() < 2)
4466 layout
->add_eh_frame_for_plt(this,
4467 Eh_cie
<64>::eh_frame_cie
,
4468 sizeof (Eh_cie
<64>::eh_frame_cie
),
4469 glink_eh_frame_fde_64v1
,
4470 sizeof (glink_eh_frame_fde_64v1
));
4472 layout
->add_eh_frame_for_plt(this,
4473 Eh_cie
<64>::eh_frame_cie
,
4474 sizeof (Eh_cie
<64>::eh_frame_cie
),
4475 glink_eh_frame_fde_64v2
,
4476 sizeof (glink_eh_frame_fde_64v2
));
4480 // 32-bit .glink can use the default since the CIE return
4481 // address reg, LR, is valid.
4482 layout
->add_eh_frame_for_plt(this,
4483 Eh_cie
<32>::eh_frame_cie
,
4484 sizeof (Eh_cie
<32>::eh_frame_cie
),
4486 sizeof (default_fde
));
4487 // Except where LR is used in a PIC __glink_PLTresolve.
4488 if (parameters
->options().output_is_position_independent())
4489 layout
->add_eh_frame_for_plt(this,
4490 Eh_cie
<32>::eh_frame_cie
,
4491 sizeof (Eh_cie
<32>::eh_frame_cie
),
4492 glink_eh_frame_fde_32
,
4493 sizeof (glink_eh_frame_fde_32
));
4497 template<int size
, bool big_endian
>
4499 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4501 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4502 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4504 this->ge_size_
+= 16;
4507 template<int size
, bool big_endian
>
4508 typename Output_data_glink
<size
, big_endian
>::Address
4509 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4511 typename
Global_entry_stub_entries::const_iterator p
4512 = this->global_entry_stubs_
.find(gsym
);
4513 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4516 template<int size
, bool big_endian
>
4518 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4520 unsigned int count
= this->targ_
->plt_entry_count();
4521 section_size_type total
= 0;
4527 // space for branch table
4528 total
+= 4 * (count
- 1);
4530 total
+= -total
& 15;
4531 total
+= this->pltresolve_size
;
4535 total
+= this->pltresolve_size
;
4537 // space for branch table
4539 if (this->targ_
->abiversion() < 2)
4543 total
+= 4 * (count
- 0x8000);
4547 this->end_branch_table_
= total
;
4548 total
= (total
+ 15) & -16;
4549 total
+= this->ge_size_
;
4551 this->set_data_size(total
);
4554 // Write out plt and long branch stub code.
4556 template<int size
, bool big_endian
>
4558 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4560 if (this->plt_call_stubs_
.empty()
4561 && this->long_branch_stubs_
.empty())
4564 const section_size_type start_off
= this->offset();
4565 const section_size_type off
= this->stub_offset();
4566 const section_size_type oview_size
=
4567 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4568 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4573 const Output_data_got_powerpc
<size
, big_endian
>* got
4574 = this->targ_
->got_section();
4575 Address got_os_addr
= got
->output_section()->address();
4577 if (!this->plt_call_stubs_
.empty())
4579 // The base address of the .plt section.
4580 Address plt_base
= this->targ_
->plt_section()->address();
4581 Address iplt_base
= invalid_address
;
4583 // Write out plt call stubs.
4584 typename
Plt_stub_entries::const_iterator cs
;
4585 for (cs
= this->plt_call_stubs_
.begin();
4586 cs
!= this->plt_call_stubs_
.end();
4590 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4591 Address plt_addr
= pltoff
;
4594 if (iplt_base
== invalid_address
)
4595 iplt_base
= this->targ_
->iplt_section()->address();
4596 plt_addr
+= iplt_base
;
4599 plt_addr
+= plt_base
;
4600 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4601 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4602 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4603 Address off
= plt_addr
- got_addr
;
4605 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4606 gold_error(_("%s: linkage table error against `%s'"),
4607 cs
->first
.object_
->name().c_str(),
4608 cs
->first
.sym_
->demangled_name().c_str());
4610 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4612 = plt_load_toc
&& parameters
->options().plt_static_chain();
4614 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4615 bool use_fake_dep
= false;
4616 Address cmp_branch_off
= 0;
4619 unsigned int pltindex
4620 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4621 / this->targ_
->plt_entry_size());
4623 = (this->targ_
->glink_section()->pltresolve_size
4625 if (pltindex
> 32768)
4626 glinkoff
+= (pltindex
- 32768) * 4;
4628 = this->targ_
->glink_section()->address() + glinkoff
;
4630 = (this->stub_address() + cs
->second
+ 24
4631 + 4 * (ha(off
) != 0)
4632 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4633 + 4 * static_chain
);
4634 cmp_branch_off
= to
- from
;
4635 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4638 p
= oview
+ cs
->second
;
4641 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4645 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4647 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4652 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4654 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4658 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4660 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4664 write_insn
<big_endian
>(p
, mtctr_12
);
4670 write_insn
<big_endian
>(p
, xor_2_12_12
);
4672 write_insn
<big_endian
>(p
, add_11_11_2
);
4675 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4679 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4686 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4688 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4691 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4693 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4697 write_insn
<big_endian
>(p
, mtctr_12
);
4703 write_insn
<big_endian
>(p
, xor_11_12_12
);
4705 write_insn
<big_endian
>(p
, add_2_2_11
);
4710 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4713 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4717 if (thread_safe
&& !use_fake_dep
)
4719 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4721 write_insn
<big_endian
>(p
, bnectr_p4
);
4723 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4726 write_insn
<big_endian
>(p
, bctr
);
4730 // Write out long branch stubs.
4731 typename
Branch_stub_entries::const_iterator bs
;
4732 for (bs
= this->long_branch_stubs_
.begin();
4733 bs
!= this->long_branch_stubs_
.end();
4736 if (bs
->first
.save_res_
)
4738 p
= oview
+ this->plt_size_
+ bs
->second
;
4739 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4740 Address delta
= bs
->first
.dest_
- loc
;
4741 if (delta
+ (1 << 25) < 2 << 25)
4742 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4746 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4747 gold_assert(brlt_addr
!= invalid_address
);
4748 brlt_addr
+= this->targ_
->brlt_section()->address();
4749 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4750 Address brltoff
= brlt_addr
- got_addr
;
4751 if (ha(brltoff
) == 0)
4753 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4757 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4758 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4760 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4761 write_insn
<big_endian
>(p
, bctr
);
4767 if (!this->plt_call_stubs_
.empty())
4769 // The base address of the .plt section.
4770 Address plt_base
= this->targ_
->plt_section()->address();
4771 Address iplt_base
= invalid_address
;
4772 // The address of _GLOBAL_OFFSET_TABLE_.
4773 Address g_o_t
= invalid_address
;
4775 // Write out plt call stubs.
4776 typename
Plt_stub_entries::const_iterator cs
;
4777 for (cs
= this->plt_call_stubs_
.begin();
4778 cs
!= this->plt_call_stubs_
.end();
4782 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4785 if (iplt_base
== invalid_address
)
4786 iplt_base
= this->targ_
->iplt_section()->address();
4787 plt_addr
+= iplt_base
;
4790 plt_addr
+= plt_base
;
4792 p
= oview
+ cs
->second
;
4793 if (parameters
->options().output_is_position_independent())
4796 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4797 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4798 (cs
->first
.object_
));
4799 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4801 unsigned int got2
= ppcobj
->got2_shndx();
4802 got_addr
= ppcobj
->get_output_section_offset(got2
);
4803 gold_assert(got_addr
!= invalid_address
);
4804 got_addr
+= (ppcobj
->output_section(got2
)->address()
4805 + cs
->first
.addend_
);
4809 if (g_o_t
== invalid_address
)
4811 const Output_data_got_powerpc
<size
, big_endian
>* got
4812 = this->targ_
->got_section();
4813 g_o_t
= got
->address() + got
->g_o_t();
4818 Address off
= plt_addr
- got_addr
;
4821 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4822 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4823 write_insn
<big_endian
>(p
+ 8, bctr
);
4827 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4828 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4829 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4830 write_insn
<big_endian
>(p
+ 12, bctr
);
4835 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4836 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4837 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4838 write_insn
<big_endian
>(p
+ 12, bctr
);
4843 // Write out long branch stubs.
4844 typename
Branch_stub_entries::const_iterator bs
;
4845 for (bs
= this->long_branch_stubs_
.begin();
4846 bs
!= this->long_branch_stubs_
.end();
4849 if (bs
->first
.save_res_
)
4851 p
= oview
+ this->plt_size_
+ bs
->second
;
4852 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4853 Address delta
= bs
->first
.dest_
- loc
;
4854 if (delta
+ (1 << 25) < 2 << 25)
4855 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4856 else if (!parameters
->options().output_is_position_independent())
4858 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4859 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4860 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4861 write_insn
<big_endian
>(p
+ 12, bctr
);
4866 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4867 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4868 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4869 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4870 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4871 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4872 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4873 write_insn
<big_endian
>(p
+ 28, bctr
);
4877 if (this->need_save_res_
)
4879 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4880 memcpy (p
, this->targ_
->savres_section()->contents(),
4881 this->targ_
->savres_section()->data_size());
4885 // Write out .glink.
4887 template<int size
, bool big_endian
>
4889 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4891 const section_size_type off
= this->offset();
4892 const section_size_type oview_size
=
4893 convert_to_section_size_type(this->data_size());
4894 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4897 // The base address of the .plt section.
4898 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4899 Address plt_base
= this->targ_
->plt_section()->address();
4903 if (this->end_branch_table_
!= 0)
4905 // Write pltresolve stub.
4907 Address after_bcl
= this->address() + 16;
4908 Address pltoff
= plt_base
- after_bcl
;
4910 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4912 if (this->targ_
->abiversion() < 2)
4914 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4915 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4916 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4917 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4918 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4919 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4920 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4921 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4922 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4923 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4927 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4928 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4929 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4930 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4931 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4932 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4933 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4934 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4935 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4936 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4937 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4938 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4940 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4941 while (p
< oview
+ this->pltresolve_size
)
4942 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4944 // Write lazy link call stubs.
4946 while (p
< oview
+ this->end_branch_table_
)
4948 if (this->targ_
->abiversion() < 2)
4952 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4956 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4957 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4960 uint32_t branch_off
= 8 - (p
- oview
);
4961 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4966 Address plt_base
= this->targ_
->plt_section()->address();
4967 Address iplt_base
= invalid_address
;
4968 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4969 Address global_entry_base
= this->address() + global_entry_off
;
4970 typename
Global_entry_stub_entries::const_iterator ge
;
4971 for (ge
= this->global_entry_stubs_
.begin();
4972 ge
!= this->global_entry_stubs_
.end();
4975 p
= oview
+ global_entry_off
+ ge
->second
;
4976 Address plt_addr
= ge
->first
->plt_offset();
4977 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4978 && ge
->first
->can_use_relative_reloc(false))
4980 if (iplt_base
== invalid_address
)
4981 iplt_base
= this->targ_
->iplt_section()->address();
4982 plt_addr
+= iplt_base
;
4985 plt_addr
+= plt_base
;
4986 Address my_addr
= global_entry_base
+ ge
->second
;
4987 Address off
= plt_addr
- my_addr
;
4989 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4990 gold_error(_("%s: linkage table error against `%s'"),
4991 ge
->first
->object()->name().c_str(),
4992 ge
->first
->demangled_name().c_str());
4994 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4995 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4996 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4997 write_insn
<big_endian
>(p
, bctr
);
5002 const Output_data_got_powerpc
<size
, big_endian
>* got
5003 = this->targ_
->got_section();
5004 // The address of _GLOBAL_OFFSET_TABLE_.
5005 Address g_o_t
= got
->address() + got
->g_o_t();
5007 // Write out pltresolve branch table.
5009 unsigned int the_end
= oview_size
- this->pltresolve_size
;
5010 unsigned char* end_p
= oview
+ the_end
;
5011 while (p
< end_p
- 8 * 4)
5012 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5014 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5016 // Write out pltresolve call stub.
5017 if (parameters
->options().output_is_position_independent())
5019 Address res0_off
= 0;
5020 Address after_bcl_off
= the_end
+ 12;
5021 Address bcl_res0
= after_bcl_off
- res0_off
;
5023 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
5024 write_insn
<big_endian
>(p
+ 4, mflr_0
);
5025 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
5026 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
5027 write_insn
<big_endian
>(p
+ 16, mflr_12
);
5028 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5029 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
5031 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5033 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
5034 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5036 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
5037 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
5041 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
5042 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
5044 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
5045 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
5046 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
5047 write_insn
<big_endian
>(p
+ 52, bctr
);
5048 write_insn
<big_endian
>(p
+ 56, nop
);
5049 write_insn
<big_endian
>(p
+ 60, nop
);
5053 Address res0
= this->address();
5055 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
5056 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
5057 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5058 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
5060 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
5061 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
5062 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
5063 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
5064 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5065 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
5067 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
5068 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
5069 write_insn
<big_endian
>(p
+ 32, bctr
);
5070 write_insn
<big_endian
>(p
+ 36, nop
);
5071 write_insn
<big_endian
>(p
+ 40, nop
);
5072 write_insn
<big_endian
>(p
+ 44, nop
);
5073 write_insn
<big_endian
>(p
+ 48, nop
);
5074 write_insn
<big_endian
>(p
+ 52, nop
);
5075 write_insn
<big_endian
>(p
+ 56, nop
);
5076 write_insn
<big_endian
>(p
+ 60, nop
);
5081 of
->write_output_view(off
, oview_size
, oview
);
5085 // A class to handle linker generated save/restore functions.
5087 template<int size
, bool big_endian
>
5088 class Output_data_save_res
: public Output_section_data_build
5091 Output_data_save_res(Symbol_table
* symtab
);
5093 const unsigned char*
5100 // Write to a map file.
5102 do_print_to_mapfile(Mapfile
* mapfile
) const
5103 { mapfile
->print_output_data(this, _("** save/restore")); }
5106 do_write(Output_file
*);
5109 // The maximum size of save/restore contents.
5110 static const unsigned int savres_max
= 218*4;
5113 savres_define(Symbol_table
* symtab
,
5115 unsigned int lo
, unsigned int hi
,
5116 unsigned char* write_ent(unsigned char*, int),
5117 unsigned char* write_tail(unsigned char*, int));
5119 unsigned char *contents_
;
5122 template<bool big_endian
>
5123 static unsigned char*
5124 savegpr0(unsigned char* p
, int r
)
5126 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5127 write_insn
<big_endian
>(p
, insn
);
5131 template<bool big_endian
>
5132 static unsigned char*
5133 savegpr0_tail(unsigned char* p
, int r
)
5135 p
= savegpr0
<big_endian
>(p
, r
);
5136 uint32_t insn
= std_0_1
+ 16;
5137 write_insn
<big_endian
>(p
, insn
);
5139 write_insn
<big_endian
>(p
, blr
);
5143 template<bool big_endian
>
5144 static unsigned char*
5145 restgpr0(unsigned char* p
, int r
)
5147 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5148 write_insn
<big_endian
>(p
, insn
);
5152 template<bool big_endian
>
5153 static unsigned char*
5154 restgpr0_tail(unsigned char* p
, int r
)
5156 uint32_t insn
= ld_0_1
+ 16;
5157 write_insn
<big_endian
>(p
, insn
);
5159 p
= restgpr0
<big_endian
>(p
, r
);
5160 write_insn
<big_endian
>(p
, mtlr_0
);
5164 p
= restgpr0
<big_endian
>(p
, 30);
5165 p
= restgpr0
<big_endian
>(p
, 31);
5167 write_insn
<big_endian
>(p
, blr
);
5171 template<bool big_endian
>
5172 static unsigned char*
5173 savegpr1(unsigned char* p
, int r
)
5175 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5176 write_insn
<big_endian
>(p
, insn
);
5180 template<bool big_endian
>
5181 static unsigned char*
5182 savegpr1_tail(unsigned char* p
, int r
)
5184 p
= savegpr1
<big_endian
>(p
, r
);
5185 write_insn
<big_endian
>(p
, blr
);
5189 template<bool big_endian
>
5190 static unsigned char*
5191 restgpr1(unsigned char* p
, int r
)
5193 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5194 write_insn
<big_endian
>(p
, insn
);
5198 template<bool big_endian
>
5199 static unsigned char*
5200 restgpr1_tail(unsigned char* p
, int r
)
5202 p
= restgpr1
<big_endian
>(p
, r
);
5203 write_insn
<big_endian
>(p
, blr
);
5207 template<bool big_endian
>
5208 static unsigned char*
5209 savefpr(unsigned char* p
, int r
)
5211 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5212 write_insn
<big_endian
>(p
, insn
);
5216 template<bool big_endian
>
5217 static unsigned char*
5218 savefpr0_tail(unsigned char* p
, int r
)
5220 p
= savefpr
<big_endian
>(p
, r
);
5221 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5223 write_insn
<big_endian
>(p
, blr
);
5227 template<bool big_endian
>
5228 static unsigned char*
5229 restfpr(unsigned char* p
, int r
)
5231 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5232 write_insn
<big_endian
>(p
, insn
);
5236 template<bool big_endian
>
5237 static unsigned char*
5238 restfpr0_tail(unsigned char* p
, int r
)
5240 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5242 p
= restfpr
<big_endian
>(p
, r
);
5243 write_insn
<big_endian
>(p
, mtlr_0
);
5247 p
= restfpr
<big_endian
>(p
, 30);
5248 p
= restfpr
<big_endian
>(p
, 31);
5250 write_insn
<big_endian
>(p
, blr
);
5254 template<bool big_endian
>
5255 static unsigned char*
5256 savefpr1_tail(unsigned char* p
, int r
)
5258 p
= savefpr
<big_endian
>(p
, r
);
5259 write_insn
<big_endian
>(p
, blr
);
5263 template<bool big_endian
>
5264 static unsigned char*
5265 restfpr1_tail(unsigned char* p
, int r
)
5267 p
= restfpr
<big_endian
>(p
, r
);
5268 write_insn
<big_endian
>(p
, blr
);
5272 template<bool big_endian
>
5273 static unsigned char*
5274 savevr(unsigned char* p
, int r
)
5276 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5277 write_insn
<big_endian
>(p
, insn
);
5279 insn
= stvx_0_12_0
+ (r
<< 21);
5280 write_insn
<big_endian
>(p
, insn
);
5284 template<bool big_endian
>
5285 static unsigned char*
5286 savevr_tail(unsigned char* p
, int r
)
5288 p
= savevr
<big_endian
>(p
, r
);
5289 write_insn
<big_endian
>(p
, blr
);
5293 template<bool big_endian
>
5294 static unsigned char*
5295 restvr(unsigned char* p
, int r
)
5297 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5298 write_insn
<big_endian
>(p
, insn
);
5300 insn
= lvx_0_12_0
+ (r
<< 21);
5301 write_insn
<big_endian
>(p
, insn
);
5305 template<bool big_endian
>
5306 static unsigned char*
5307 restvr_tail(unsigned char* p
, int r
)
5309 p
= restvr
<big_endian
>(p
, r
);
5310 write_insn
<big_endian
>(p
, blr
);
5315 template<int size
, bool big_endian
>
5316 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5317 Symbol_table
* symtab
)
5318 : Output_section_data_build(4),
5321 this->savres_define(symtab
,
5322 "_savegpr0_", 14, 31,
5323 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5324 this->savres_define(symtab
,
5325 "_restgpr0_", 14, 29,
5326 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5327 this->savres_define(symtab
,
5328 "_restgpr0_", 30, 31,
5329 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5330 this->savres_define(symtab
,
5331 "_savegpr1_", 14, 31,
5332 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5333 this->savres_define(symtab
,
5334 "_restgpr1_", 14, 31,
5335 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5336 this->savres_define(symtab
,
5337 "_savefpr_", 14, 31,
5338 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5339 this->savres_define(symtab
,
5340 "_restfpr_", 14, 29,
5341 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5342 this->savres_define(symtab
,
5343 "_restfpr_", 30, 31,
5344 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5345 this->savres_define(symtab
,
5347 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5348 this->savres_define(symtab
,
5350 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5351 this->savres_define(symtab
,
5353 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5354 this->savres_define(symtab
,
5356 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5359 template<int size
, bool big_endian
>
5361 Output_data_save_res
<size
, big_endian
>::savres_define(
5362 Symbol_table
* symtab
,
5364 unsigned int lo
, unsigned int hi
,
5365 unsigned char* write_ent(unsigned char*, int),
5366 unsigned char* write_tail(unsigned char*, int))
5368 size_t len
= strlen(name
);
5369 bool writing
= false;
5372 memcpy(sym
, name
, len
);
5375 for (unsigned int i
= lo
; i
<= hi
; i
++)
5377 sym
[len
+ 0] = i
/ 10 + '0';
5378 sym
[len
+ 1] = i
% 10 + '0';
5379 Symbol
* gsym
= symtab
->lookup(sym
);
5380 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5381 writing
= writing
|| refd
;
5384 if (this->contents_
== NULL
)
5385 this->contents_
= new unsigned char[this->savres_max
];
5387 section_size_type value
= this->current_data_size();
5388 unsigned char* p
= this->contents_
+ value
;
5390 p
= write_ent(p
, i
);
5392 p
= write_tail(p
, i
);
5393 section_size_type cur_size
= p
- this->contents_
;
5394 this->set_current_data_size(cur_size
);
5396 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5397 this, value
, cur_size
- value
,
5398 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5399 elfcpp::STV_HIDDEN
, 0, false, false);
5404 // Write out save/restore.
5406 template<int size
, bool big_endian
>
5408 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5410 const section_size_type off
= this->offset();
5411 const section_size_type oview_size
=
5412 convert_to_section_size_type(this->data_size());
5413 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5414 memcpy(oview
, this->contents_
, oview_size
);
5415 of
->write_output_view(off
, oview_size
, oview
);
5419 // Create the glink section.
5421 template<int size
, bool big_endian
>
5423 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5425 if (this->glink_
== NULL
)
5427 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5428 this->glink_
->add_eh_frame(layout
);
5429 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5430 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5431 this->glink_
, ORDER_TEXT
, false);
5435 // Create a PLT entry for a global symbol.
5437 template<int size
, bool big_endian
>
5439 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5443 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5444 && gsym
->can_use_relative_reloc(false))
5446 if (this->iplt_
== NULL
)
5447 this->make_iplt_section(symtab
, layout
);
5448 this->iplt_
->add_ifunc_entry(gsym
);
5452 if (this->plt_
== NULL
)
5453 this->make_plt_section(symtab
, layout
);
5454 this->plt_
->add_entry(gsym
);
5458 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5460 template<int size
, bool big_endian
>
5462 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5463 Symbol_table
* symtab
,
5465 Sized_relobj_file
<size
, big_endian
>* relobj
,
5468 if (this->iplt_
== NULL
)
5469 this->make_iplt_section(symtab
, layout
);
5470 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5473 // Return the number of entries in the PLT.
5475 template<int size
, bool big_endian
>
5477 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5479 if (this->plt_
== NULL
)
5481 return this->plt_
->entry_count();
5484 // Create a GOT entry for local dynamic __tls_get_addr calls.
5486 template<int size
, bool big_endian
>
5488 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5489 Symbol_table
* symtab
,
5491 Sized_relobj_file
<size
, big_endian
>* object
)
5493 if (this->tlsld_got_offset_
== -1U)
5495 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5496 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5497 Output_data_got_powerpc
<size
, big_endian
>* got
5498 = this->got_section(symtab
, layout
);
5499 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5500 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5502 this->tlsld_got_offset_
= got_offset
;
5504 return this->tlsld_got_offset_
;
5507 // Get the Reference_flags for a particular relocation.
5509 template<int size
, bool big_endian
>
5511 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5512 unsigned int r_type
,
5513 const Target_powerpc
* target
)
5519 case elfcpp::R_POWERPC_NONE
:
5520 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5521 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5522 case elfcpp::R_PPC64_TOC
:
5523 // No symbol reference.
5526 case elfcpp::R_PPC64_ADDR64
:
5527 case elfcpp::R_PPC64_UADDR64
:
5528 case elfcpp::R_POWERPC_ADDR32
:
5529 case elfcpp::R_POWERPC_UADDR32
:
5530 case elfcpp::R_POWERPC_ADDR16
:
5531 case elfcpp::R_POWERPC_UADDR16
:
5532 case elfcpp::R_POWERPC_ADDR16_LO
:
5533 case elfcpp::R_POWERPC_ADDR16_HI
:
5534 case elfcpp::R_POWERPC_ADDR16_HA
:
5535 ref
= Symbol::ABSOLUTE_REF
;
5538 case elfcpp::R_POWERPC_ADDR24
:
5539 case elfcpp::R_POWERPC_ADDR14
:
5540 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5541 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5542 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5545 case elfcpp::R_PPC64_REL64
:
5546 case elfcpp::R_POWERPC_REL32
:
5547 case elfcpp::R_PPC_LOCAL24PC
:
5548 case elfcpp::R_POWERPC_REL16
:
5549 case elfcpp::R_POWERPC_REL16_LO
:
5550 case elfcpp::R_POWERPC_REL16_HI
:
5551 case elfcpp::R_POWERPC_REL16_HA
:
5552 ref
= Symbol::RELATIVE_REF
;
5555 case elfcpp::R_POWERPC_REL24
:
5556 case elfcpp::R_PPC_PLTREL24
:
5557 case elfcpp::R_POWERPC_REL14
:
5558 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5559 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5560 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5563 case elfcpp::R_POWERPC_GOT16
:
5564 case elfcpp::R_POWERPC_GOT16_LO
:
5565 case elfcpp::R_POWERPC_GOT16_HI
:
5566 case elfcpp::R_POWERPC_GOT16_HA
:
5567 case elfcpp::R_PPC64_GOT16_DS
:
5568 case elfcpp::R_PPC64_GOT16_LO_DS
:
5569 case elfcpp::R_PPC64_TOC16
:
5570 case elfcpp::R_PPC64_TOC16_LO
:
5571 case elfcpp::R_PPC64_TOC16_HI
:
5572 case elfcpp::R_PPC64_TOC16_HA
:
5573 case elfcpp::R_PPC64_TOC16_DS
:
5574 case elfcpp::R_PPC64_TOC16_LO_DS
:
5575 ref
= Symbol::RELATIVE_REF
;
5578 case elfcpp::R_POWERPC_GOT_TPREL16
:
5579 case elfcpp::R_POWERPC_TLS
:
5580 ref
= Symbol::TLS_REF
;
5583 case elfcpp::R_POWERPC_COPY
:
5584 case elfcpp::R_POWERPC_GLOB_DAT
:
5585 case elfcpp::R_POWERPC_JMP_SLOT
:
5586 case elfcpp::R_POWERPC_RELATIVE
:
5587 case elfcpp::R_POWERPC_DTPMOD
:
5589 // Not expected. We will give an error later.
5593 if (size
== 64 && target
->abiversion() < 2)
5594 ref
|= Symbol::FUNC_DESC_ABI
;
5598 // Report an unsupported relocation against a local symbol.
5600 template<int size
, bool big_endian
>
5602 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5603 Sized_relobj_file
<size
, big_endian
>* object
,
5604 unsigned int r_type
)
5606 gold_error(_("%s: unsupported reloc %u against local symbol"),
5607 object
->name().c_str(), r_type
);
5610 // We are about to emit a dynamic relocation of type R_TYPE. If the
5611 // dynamic linker does not support it, issue an error.
5613 template<int size
, bool big_endian
>
5615 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5616 unsigned int r_type
)
5618 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5620 // These are the relocation types supported by glibc for both 32-bit
5621 // and 64-bit powerpc.
5624 case elfcpp::R_POWERPC_NONE
:
5625 case elfcpp::R_POWERPC_RELATIVE
:
5626 case elfcpp::R_POWERPC_GLOB_DAT
:
5627 case elfcpp::R_POWERPC_DTPMOD
:
5628 case elfcpp::R_POWERPC_DTPREL
:
5629 case elfcpp::R_POWERPC_TPREL
:
5630 case elfcpp::R_POWERPC_JMP_SLOT
:
5631 case elfcpp::R_POWERPC_COPY
:
5632 case elfcpp::R_POWERPC_IRELATIVE
:
5633 case elfcpp::R_POWERPC_ADDR32
:
5634 case elfcpp::R_POWERPC_UADDR32
:
5635 case elfcpp::R_POWERPC_ADDR24
:
5636 case elfcpp::R_POWERPC_ADDR16
:
5637 case elfcpp::R_POWERPC_UADDR16
:
5638 case elfcpp::R_POWERPC_ADDR16_LO
:
5639 case elfcpp::R_POWERPC_ADDR16_HI
:
5640 case elfcpp::R_POWERPC_ADDR16_HA
:
5641 case elfcpp::R_POWERPC_ADDR14
:
5642 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5643 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5644 case elfcpp::R_POWERPC_REL32
:
5645 case elfcpp::R_POWERPC_REL24
:
5646 case elfcpp::R_POWERPC_TPREL16
:
5647 case elfcpp::R_POWERPC_TPREL16_LO
:
5648 case elfcpp::R_POWERPC_TPREL16_HI
:
5649 case elfcpp::R_POWERPC_TPREL16_HA
:
5660 // These are the relocation types supported only on 64-bit.
5661 case elfcpp::R_PPC64_ADDR64
:
5662 case elfcpp::R_PPC64_UADDR64
:
5663 case elfcpp::R_PPC64_JMP_IREL
:
5664 case elfcpp::R_PPC64_ADDR16_DS
:
5665 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5666 case elfcpp::R_PPC64_ADDR16_HIGH
:
5667 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5668 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5669 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5670 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5671 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5672 case elfcpp::R_PPC64_REL64
:
5673 case elfcpp::R_POWERPC_ADDR30
:
5674 case elfcpp::R_PPC64_TPREL16_DS
:
5675 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5676 case elfcpp::R_PPC64_TPREL16_HIGH
:
5677 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5678 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5679 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5680 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5681 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5692 // These are the relocation types supported only on 32-bit.
5693 // ??? glibc ld.so doesn't need to support these.
5694 case elfcpp::R_POWERPC_DTPREL16
:
5695 case elfcpp::R_POWERPC_DTPREL16_LO
:
5696 case elfcpp::R_POWERPC_DTPREL16_HI
:
5697 case elfcpp::R_POWERPC_DTPREL16_HA
:
5705 // This prevents us from issuing more than one error per reloc
5706 // section. But we can still wind up issuing more than one
5707 // error per object file.
5708 if (this->issued_non_pic_error_
)
5710 gold_assert(parameters
->options().output_is_position_independent());
5711 object
->error(_("requires unsupported dynamic reloc; "
5712 "recompile with -fPIC"));
5713 this->issued_non_pic_error_
= true;
5717 // Return whether we need to make a PLT entry for a relocation of the
5718 // given type against a STT_GNU_IFUNC symbol.
5720 template<int size
, bool big_endian
>
5722 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5723 Target_powerpc
<size
, big_endian
>* target
,
5724 Sized_relobj_file
<size
, big_endian
>* object
,
5725 unsigned int r_type
,
5728 // In non-pic code any reference will resolve to the plt call stub
5729 // for the ifunc symbol.
5730 if ((size
== 32 || target
->abiversion() >= 2)
5731 && !parameters
->options().output_is_position_independent())
5736 // Word size refs from data sections are OK, but don't need a PLT entry.
5737 case elfcpp::R_POWERPC_ADDR32
:
5738 case elfcpp::R_POWERPC_UADDR32
:
5743 case elfcpp::R_PPC64_ADDR64
:
5744 case elfcpp::R_PPC64_UADDR64
:
5749 // GOT refs are good, but also don't need a PLT entry.
5750 case elfcpp::R_POWERPC_GOT16
:
5751 case elfcpp::R_POWERPC_GOT16_LO
:
5752 case elfcpp::R_POWERPC_GOT16_HI
:
5753 case elfcpp::R_POWERPC_GOT16_HA
:
5754 case elfcpp::R_PPC64_GOT16_DS
:
5755 case elfcpp::R_PPC64_GOT16_LO_DS
:
5758 // Function calls are good, and these do need a PLT entry.
5759 case elfcpp::R_POWERPC_ADDR24
:
5760 case elfcpp::R_POWERPC_ADDR14
:
5761 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5762 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5763 case elfcpp::R_POWERPC_REL24
:
5764 case elfcpp::R_PPC_PLTREL24
:
5765 case elfcpp::R_POWERPC_REL14
:
5766 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5767 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5774 // Anything else is a problem.
5775 // If we are building a static executable, the libc startup function
5776 // responsible for applying indirect function relocations is going
5777 // to complain about the reloc type.
5778 // If we are building a dynamic executable, we will have a text
5779 // relocation. The dynamic loader will set the text segment
5780 // writable and non-executable to apply text relocations. So we'll
5781 // segfault when trying to run the indirection function to resolve
5784 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5785 object
->name().c_str(), r_type
);
5789 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5793 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
5795 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
5796 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
5797 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5798 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5799 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5800 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5801 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5802 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5803 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5804 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5805 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5806 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5807 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5808 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5809 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5810 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
5811 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
5812 /* Exclude lfqu by testing reloc. If relocs are ever
5813 defined for the reduced D field in psq_lu then those
5814 will need testing too. */
5815 && r_type
!= elfcpp::R_PPC64_TOC16_LO
5816 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
5817 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
5819 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
5820 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
5821 /* Exclude stfqu. psq_stu as above for psq_lu. */
5822 && r_type
!= elfcpp::R_PPC64_TOC16_LO
5823 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
5824 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
5825 && (insn
& 1) == 0));
5828 // Scan a relocation for a local symbol.
5830 template<int size
, bool big_endian
>
5832 Target_powerpc
<size
, big_endian
>::Scan::local(
5833 Symbol_table
* symtab
,
5835 Target_powerpc
<size
, big_endian
>* target
,
5836 Sized_relobj_file
<size
, big_endian
>* object
,
5837 unsigned int data_shndx
,
5838 Output_section
* output_section
,
5839 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5840 unsigned int r_type
,
5841 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5844 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5846 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5847 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5849 this->expect_tls_get_addr_call();
5850 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5851 if (tls_type
!= tls::TLSOPT_NONE
)
5852 this->skip_next_tls_get_addr_call();
5854 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5855 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5857 this->expect_tls_get_addr_call();
5858 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5859 if (tls_type
!= tls::TLSOPT_NONE
)
5860 this->skip_next_tls_get_addr_call();
5863 Powerpc_relobj
<size
, big_endian
>* ppc_object
5864 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5869 && data_shndx
== ppc_object
->opd_shndx()
5870 && r_type
== elfcpp::R_PPC64_ADDR64
)
5871 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5875 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5876 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5877 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5879 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5880 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5881 r_type
, r_sym
, reloc
.get_r_addend());
5882 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5887 case elfcpp::R_POWERPC_NONE
:
5888 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5889 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5890 case elfcpp::R_PPC64_TOCSAVE
:
5891 case elfcpp::R_POWERPC_TLS
:
5892 case elfcpp::R_PPC64_ENTRY
:
5895 case elfcpp::R_PPC64_TOC
:
5897 Output_data_got_powerpc
<size
, big_endian
>* got
5898 = target
->got_section(symtab
, layout
);
5899 if (parameters
->options().output_is_position_independent())
5901 Address off
= reloc
.get_r_offset();
5903 && target
->abiversion() < 2
5904 && data_shndx
== ppc_object
->opd_shndx()
5905 && ppc_object
->get_opd_discard(off
- 8))
5908 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5909 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5910 rela_dyn
->add_output_section_relative(got
->output_section(),
5911 elfcpp::R_POWERPC_RELATIVE
,
5913 object
, data_shndx
, off
,
5914 symobj
->toc_base_offset());
5919 case elfcpp::R_PPC64_ADDR64
:
5920 case elfcpp::R_PPC64_UADDR64
:
5921 case elfcpp::R_POWERPC_ADDR32
:
5922 case elfcpp::R_POWERPC_UADDR32
:
5923 case elfcpp::R_POWERPC_ADDR24
:
5924 case elfcpp::R_POWERPC_ADDR16
:
5925 case elfcpp::R_POWERPC_ADDR16_LO
:
5926 case elfcpp::R_POWERPC_ADDR16_HI
:
5927 case elfcpp::R_POWERPC_ADDR16_HA
:
5928 case elfcpp::R_POWERPC_UADDR16
:
5929 case elfcpp::R_PPC64_ADDR16_HIGH
:
5930 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5931 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5932 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5933 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5934 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5935 case elfcpp::R_PPC64_ADDR16_DS
:
5936 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5937 case elfcpp::R_POWERPC_ADDR14
:
5938 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5939 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5940 // If building a shared library (or a position-independent
5941 // executable), we need to create a dynamic relocation for
5943 if (parameters
->options().output_is_position_independent()
5944 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5946 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5948 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5949 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5950 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5952 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5953 : elfcpp::R_POWERPC_RELATIVE
);
5954 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5955 output_section
, data_shndx
,
5956 reloc
.get_r_offset(),
5957 reloc
.get_r_addend(), false);
5959 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5961 check_non_pic(object
, r_type
);
5962 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5963 data_shndx
, reloc
.get_r_offset(),
5964 reloc
.get_r_addend());
5968 gold_assert(lsym
.get_st_value() == 0);
5969 unsigned int shndx
= lsym
.get_st_shndx();
5971 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5974 object
->error(_("section symbol %u has bad shndx %u"),
5977 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5978 output_section
, data_shndx
,
5979 reloc
.get_r_offset());
5984 case elfcpp::R_POWERPC_REL24
:
5985 case elfcpp::R_PPC_PLTREL24
:
5986 case elfcpp::R_PPC_LOCAL24PC
:
5987 case elfcpp::R_POWERPC_REL14
:
5988 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5989 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5992 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5993 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5994 r_type
, r_sym
, reloc
.get_r_addend());
5998 case elfcpp::R_PPC64_REL64
:
5999 case elfcpp::R_POWERPC_REL32
:
6000 case elfcpp::R_POWERPC_REL16
:
6001 case elfcpp::R_POWERPC_REL16_LO
:
6002 case elfcpp::R_POWERPC_REL16_HI
:
6003 case elfcpp::R_POWERPC_REL16_HA
:
6004 case elfcpp::R_POWERPC_REL16DX_HA
:
6005 case elfcpp::R_POWERPC_SECTOFF
:
6006 case elfcpp::R_POWERPC_SECTOFF_LO
:
6007 case elfcpp::R_POWERPC_SECTOFF_HI
:
6008 case elfcpp::R_POWERPC_SECTOFF_HA
:
6009 case elfcpp::R_PPC64_SECTOFF_DS
:
6010 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6011 case elfcpp::R_POWERPC_TPREL16
:
6012 case elfcpp::R_POWERPC_TPREL16_LO
:
6013 case elfcpp::R_POWERPC_TPREL16_HI
:
6014 case elfcpp::R_POWERPC_TPREL16_HA
:
6015 case elfcpp::R_PPC64_TPREL16_DS
:
6016 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6017 case elfcpp::R_PPC64_TPREL16_HIGH
:
6018 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6019 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6020 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6021 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6022 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6023 case elfcpp::R_POWERPC_DTPREL16
:
6024 case elfcpp::R_POWERPC_DTPREL16_LO
:
6025 case elfcpp::R_POWERPC_DTPREL16_HI
:
6026 case elfcpp::R_POWERPC_DTPREL16_HA
:
6027 case elfcpp::R_PPC64_DTPREL16_DS
:
6028 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6029 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6030 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6031 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6032 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6033 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6034 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6035 case elfcpp::R_PPC64_TLSGD
:
6036 case elfcpp::R_PPC64_TLSLD
:
6037 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6040 case elfcpp::R_POWERPC_GOT16
:
6041 case elfcpp::R_POWERPC_GOT16_LO
:
6042 case elfcpp::R_POWERPC_GOT16_HI
:
6043 case elfcpp::R_POWERPC_GOT16_HA
:
6044 case elfcpp::R_PPC64_GOT16_DS
:
6045 case elfcpp::R_PPC64_GOT16_LO_DS
:
6047 // The symbol requires a GOT entry.
6048 Output_data_got_powerpc
<size
, big_endian
>* got
6049 = target
->got_section(symtab
, layout
);
6050 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6052 if (!parameters
->options().output_is_position_independent())
6055 && (size
== 32 || target
->abiversion() >= 2))
6056 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6058 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6060 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6062 // If we are generating a shared object or a pie, this
6063 // symbol's GOT entry will be set by a dynamic relocation.
6065 off
= got
->add_constant(0);
6066 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6068 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6070 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6071 : elfcpp::R_POWERPC_RELATIVE
);
6072 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6073 got
, off
, 0, false);
6078 case elfcpp::R_PPC64_TOC16
:
6079 case elfcpp::R_PPC64_TOC16_LO
:
6080 case elfcpp::R_PPC64_TOC16_HI
:
6081 case elfcpp::R_PPC64_TOC16_HA
:
6082 case elfcpp::R_PPC64_TOC16_DS
:
6083 case elfcpp::R_PPC64_TOC16_LO_DS
:
6084 // We need a GOT section.
6085 target
->got_section(symtab
, layout
);
6088 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6089 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6090 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6091 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6093 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6094 if (tls_type
== tls::TLSOPT_NONE
)
6096 Output_data_got_powerpc
<size
, big_endian
>* got
6097 = target
->got_section(symtab
, layout
);
6098 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6099 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6100 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6101 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6103 else if (tls_type
== tls::TLSOPT_TO_LE
)
6105 // no GOT relocs needed for Local Exec.
6112 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6113 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6114 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6115 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6117 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6118 if (tls_type
== tls::TLSOPT_NONE
)
6119 target
->tlsld_got_offset(symtab
, layout
, object
);
6120 else if (tls_type
== tls::TLSOPT_TO_LE
)
6122 // no GOT relocs needed for Local Exec.
6123 if (parameters
->options().emit_relocs())
6125 Output_section
* os
= layout
->tls_segment()->first_section();
6126 gold_assert(os
!= NULL
);
6127 os
->set_needs_symtab_index();
6135 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6136 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6137 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6138 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6140 Output_data_got_powerpc
<size
, big_endian
>* got
6141 = target
->got_section(symtab
, layout
);
6142 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6143 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6147 case elfcpp::R_POWERPC_GOT_TPREL16
:
6148 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6149 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6150 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6152 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6153 if (tls_type
== tls::TLSOPT_NONE
)
6155 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6156 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6158 Output_data_got_powerpc
<size
, big_endian
>* got
6159 = target
->got_section(symtab
, layout
);
6160 unsigned int off
= got
->add_constant(0);
6161 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6163 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6164 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6165 elfcpp::R_POWERPC_TPREL
,
6169 else if (tls_type
== tls::TLSOPT_TO_LE
)
6171 // no GOT relocs needed for Local Exec.
6179 unsupported_reloc_local(object
, r_type
);
6184 && parameters
->options().toc_optimize())
6186 if (data_shndx
== ppc_object
->toc_shndx())
6189 if (r_type
!= elfcpp::R_PPC64_ADDR64
6190 || (is_ifunc
&& target
->abiversion() < 2))
6192 else if (parameters
->options().output_is_position_independent())
6198 unsigned int shndx
= lsym
.get_st_shndx();
6199 if (shndx
>= elfcpp::SHN_LORESERVE
6200 && shndx
!= elfcpp::SHN_XINDEX
)
6205 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6208 enum {no_check
, check_lo
, check_ha
} insn_check
;
6212 insn_check
= no_check
;
6215 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6216 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6217 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6218 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6219 case elfcpp::R_POWERPC_GOT16_HA
:
6220 case elfcpp::R_PPC64_TOC16_HA
:
6221 insn_check
= check_ha
;
6224 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6225 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6226 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6227 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6228 case elfcpp::R_POWERPC_GOT16_LO
:
6229 case elfcpp::R_PPC64_GOT16_LO_DS
:
6230 case elfcpp::R_PPC64_TOC16_LO
:
6231 case elfcpp::R_PPC64_TOC16_LO_DS
:
6232 insn_check
= check_lo
;
6236 section_size_type slen
;
6237 const unsigned char* view
= NULL
;
6238 if (insn_check
!= no_check
)
6240 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6241 section_size_type off
=
6242 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6245 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6246 if (insn_check
== check_lo
6247 ? !ok_lo_toc_insn(insn
, r_type
)
6248 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6249 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6251 ppc_object
->set_no_toc_opt();
6252 gold_warning(_("%s: toc optimization is not supported "
6253 "for %#08x instruction"),
6254 ppc_object
->name().c_str(), insn
);
6263 case elfcpp::R_PPC64_TOC16
:
6264 case elfcpp::R_PPC64_TOC16_LO
:
6265 case elfcpp::R_PPC64_TOC16_HI
:
6266 case elfcpp::R_PPC64_TOC16_HA
:
6267 case elfcpp::R_PPC64_TOC16_DS
:
6268 case elfcpp::R_PPC64_TOC16_LO_DS
:
6269 unsigned int shndx
= lsym
.get_st_shndx();
6270 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6272 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6273 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6275 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_offset();
6276 if (dst_off
< ppc_object
->section_size(shndx
))
6279 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6281 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6283 // Need to check that the insn is a ld
6285 view
= ppc_object
->section_contents(data_shndx
,
6288 section_size_type off
=
6289 (convert_to_section_size_type(reloc
.get_r_offset())
6290 + (big_endian
? -2 : 3));
6292 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6296 ppc_object
->set_no_toc_opt(dst_off
);
6307 case elfcpp::R_POWERPC_REL32
:
6308 if (ppc_object
->got2_shndx() != 0
6309 && parameters
->options().output_is_position_independent())
6311 unsigned int shndx
= lsym
.get_st_shndx();
6312 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6314 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6315 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
6316 && (ppc_object
->section_flags(data_shndx
)
6317 & elfcpp::SHF_EXECINSTR
) != 0)
6318 gold_error(_("%s: unsupported -mbss-plt code"),
6319 ppc_object
->name().c_str());
6329 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6330 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6331 case elfcpp::R_POWERPC_GOT_TPREL16
:
6332 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6333 case elfcpp::R_POWERPC_GOT16
:
6334 case elfcpp::R_PPC64_GOT16_DS
:
6335 case elfcpp::R_PPC64_TOC16
:
6336 case elfcpp::R_PPC64_TOC16_DS
:
6337 ppc_object
->set_has_small_toc_reloc();
6343 // Report an unsupported relocation against a global symbol.
6345 template<int size
, bool big_endian
>
6347 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
6348 Sized_relobj_file
<size
, big_endian
>* object
,
6349 unsigned int r_type
,
6352 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
6353 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
6356 // Scan a relocation for a global symbol.
6358 template<int size
, bool big_endian
>
6360 Target_powerpc
<size
, big_endian
>::Scan::global(
6361 Symbol_table
* symtab
,
6363 Target_powerpc
<size
, big_endian
>* target
,
6364 Sized_relobj_file
<size
, big_endian
>* object
,
6365 unsigned int data_shndx
,
6366 Output_section
* output_section
,
6367 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6368 unsigned int r_type
,
6371 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
6374 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6375 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6377 this->expect_tls_get_addr_call();
6378 const bool final
= gsym
->final_value_is_known();
6379 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6380 if (tls_type
!= tls::TLSOPT_NONE
)
6381 this->skip_next_tls_get_addr_call();
6383 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6384 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6386 this->expect_tls_get_addr_call();
6387 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6388 if (tls_type
!= tls::TLSOPT_NONE
)
6389 this->skip_next_tls_get_addr_call();
6392 Powerpc_relobj
<size
, big_endian
>* ppc_object
6393 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6395 // A STT_GNU_IFUNC symbol may require a PLT entry.
6396 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
6397 bool pushed_ifunc
= false;
6398 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6400 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6401 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6402 r_type
, r_sym
, reloc
.get_r_addend());
6403 target
->make_plt_entry(symtab
, layout
, gsym
);
6404 pushed_ifunc
= true;
6409 case elfcpp::R_POWERPC_NONE
:
6410 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6411 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6412 case elfcpp::R_PPC_LOCAL24PC
:
6413 case elfcpp::R_POWERPC_TLS
:
6414 case elfcpp::R_PPC64_ENTRY
:
6417 case elfcpp::R_PPC64_TOC
:
6419 Output_data_got_powerpc
<size
, big_endian
>* got
6420 = target
->got_section(symtab
, layout
);
6421 if (parameters
->options().output_is_position_independent())
6423 Address off
= reloc
.get_r_offset();
6425 && data_shndx
== ppc_object
->opd_shndx()
6426 && ppc_object
->get_opd_discard(off
- 8))
6429 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6430 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6431 if (data_shndx
!= ppc_object
->opd_shndx())
6432 symobj
= static_cast
6433 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6434 rela_dyn
->add_output_section_relative(got
->output_section(),
6435 elfcpp::R_POWERPC_RELATIVE
,
6437 object
, data_shndx
, off
,
6438 symobj
->toc_base_offset());
6443 case elfcpp::R_PPC64_ADDR64
:
6445 && target
->abiversion() < 2
6446 && data_shndx
== ppc_object
->opd_shndx()
6447 && (gsym
->is_defined_in_discarded_section()
6448 || gsym
->object() != object
))
6450 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6454 case elfcpp::R_PPC64_UADDR64
:
6455 case elfcpp::R_POWERPC_ADDR32
:
6456 case elfcpp::R_POWERPC_UADDR32
:
6457 case elfcpp::R_POWERPC_ADDR24
:
6458 case elfcpp::R_POWERPC_ADDR16
:
6459 case elfcpp::R_POWERPC_ADDR16_LO
:
6460 case elfcpp::R_POWERPC_ADDR16_HI
:
6461 case elfcpp::R_POWERPC_ADDR16_HA
:
6462 case elfcpp::R_POWERPC_UADDR16
:
6463 case elfcpp::R_PPC64_ADDR16_HIGH
:
6464 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6465 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6466 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6467 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6468 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6469 case elfcpp::R_PPC64_ADDR16_DS
:
6470 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6471 case elfcpp::R_POWERPC_ADDR14
:
6472 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6473 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6475 // Make a PLT entry if necessary.
6476 if (gsym
->needs_plt_entry())
6478 // Since this is not a PC-relative relocation, we may be
6479 // taking the address of a function. In that case we need to
6480 // set the entry in the dynamic symbol table to the address of
6481 // the PLT call stub.
6482 bool need_ifunc_plt
= false;
6483 if ((size
== 32 || target
->abiversion() >= 2)
6484 && gsym
->is_from_dynobj()
6485 && !parameters
->options().output_is_position_independent())
6487 gsym
->set_needs_dynsym_value();
6488 need_ifunc_plt
= true;
6490 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6492 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6493 target
->push_branch(ppc_object
, data_shndx
,
6494 reloc
.get_r_offset(), r_type
, r_sym
,
6495 reloc
.get_r_addend());
6496 target
->make_plt_entry(symtab
, layout
, gsym
);
6499 // Make a dynamic relocation if necessary.
6500 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6501 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6503 if (!parameters
->options().output_is_position_independent()
6504 && gsym
->may_need_copy_reloc())
6506 target
->copy_reloc(symtab
, layout
, object
,
6507 data_shndx
, output_section
, gsym
, reloc
);
6509 else if ((((size
== 32
6510 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6512 && r_type
== elfcpp::R_PPC64_ADDR64
6513 && target
->abiversion() >= 2))
6514 && gsym
->can_use_relative_reloc(false)
6515 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6516 && parameters
->options().shared()))
6518 && r_type
== elfcpp::R_PPC64_ADDR64
6519 && target
->abiversion() < 2
6520 && (gsym
->can_use_relative_reloc(false)
6521 || data_shndx
== ppc_object
->opd_shndx())))
6523 Reloc_section
* rela_dyn
6524 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6525 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6526 : elfcpp::R_POWERPC_RELATIVE
);
6527 rela_dyn
->add_symbolless_global_addend(
6528 gsym
, dynrel
, output_section
, object
, data_shndx
,
6529 reloc
.get_r_offset(), reloc
.get_r_addend());
6533 Reloc_section
* rela_dyn
6534 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6535 check_non_pic(object
, r_type
);
6536 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6538 reloc
.get_r_offset(),
6539 reloc
.get_r_addend());
6542 && parameters
->options().toc_optimize()
6543 && data_shndx
== ppc_object
->toc_shndx())
6544 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6550 case elfcpp::R_PPC_PLTREL24
:
6551 case elfcpp::R_POWERPC_REL24
:
6554 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6555 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6556 r_type
, r_sym
, reloc
.get_r_addend());
6557 if (gsym
->needs_plt_entry()
6558 || (!gsym
->final_value_is_known()
6559 && (gsym
->is_undefined()
6560 || gsym
->is_from_dynobj()
6561 || gsym
->is_preemptible())))
6562 target
->make_plt_entry(symtab
, layout
, gsym
);
6566 case elfcpp::R_PPC64_REL64
:
6567 case elfcpp::R_POWERPC_REL32
:
6568 // Make a dynamic relocation if necessary.
6569 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6571 if (!parameters
->options().output_is_position_independent()
6572 && gsym
->may_need_copy_reloc())
6574 target
->copy_reloc(symtab
, layout
, object
,
6575 data_shndx
, output_section
, gsym
,
6580 Reloc_section
* rela_dyn
6581 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6582 check_non_pic(object
, r_type
);
6583 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6584 data_shndx
, reloc
.get_r_offset(),
6585 reloc
.get_r_addend());
6590 case elfcpp::R_POWERPC_REL14
:
6591 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6592 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6595 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6596 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6597 r_type
, r_sym
, reloc
.get_r_addend());
6601 case elfcpp::R_POWERPC_REL16
:
6602 case elfcpp::R_POWERPC_REL16_LO
:
6603 case elfcpp::R_POWERPC_REL16_HI
:
6604 case elfcpp::R_POWERPC_REL16_HA
:
6605 case elfcpp::R_POWERPC_REL16DX_HA
:
6606 case elfcpp::R_POWERPC_SECTOFF
:
6607 case elfcpp::R_POWERPC_SECTOFF_LO
:
6608 case elfcpp::R_POWERPC_SECTOFF_HI
:
6609 case elfcpp::R_POWERPC_SECTOFF_HA
:
6610 case elfcpp::R_PPC64_SECTOFF_DS
:
6611 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6612 case elfcpp::R_POWERPC_TPREL16
:
6613 case elfcpp::R_POWERPC_TPREL16_LO
:
6614 case elfcpp::R_POWERPC_TPREL16_HI
:
6615 case elfcpp::R_POWERPC_TPREL16_HA
:
6616 case elfcpp::R_PPC64_TPREL16_DS
:
6617 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6618 case elfcpp::R_PPC64_TPREL16_HIGH
:
6619 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6620 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6621 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6622 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6623 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6624 case elfcpp::R_POWERPC_DTPREL16
:
6625 case elfcpp::R_POWERPC_DTPREL16_LO
:
6626 case elfcpp::R_POWERPC_DTPREL16_HI
:
6627 case elfcpp::R_POWERPC_DTPREL16_HA
:
6628 case elfcpp::R_PPC64_DTPREL16_DS
:
6629 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6630 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6631 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6632 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6633 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6634 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6635 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6636 case elfcpp::R_PPC64_TLSGD
:
6637 case elfcpp::R_PPC64_TLSLD
:
6638 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6641 case elfcpp::R_POWERPC_GOT16
:
6642 case elfcpp::R_POWERPC_GOT16_LO
:
6643 case elfcpp::R_POWERPC_GOT16_HI
:
6644 case elfcpp::R_POWERPC_GOT16_HA
:
6645 case elfcpp::R_PPC64_GOT16_DS
:
6646 case elfcpp::R_PPC64_GOT16_LO_DS
:
6648 // The symbol requires a GOT entry.
6649 Output_data_got_powerpc
<size
, big_endian
>* got
;
6651 got
= target
->got_section(symtab
, layout
);
6652 if (gsym
->final_value_is_known())
6655 && (size
== 32 || target
->abiversion() >= 2))
6656 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6658 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6660 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6662 // If we are generating a shared object or a pie, this
6663 // symbol's GOT entry will be set by a dynamic relocation.
6664 unsigned int off
= got
->add_constant(0);
6665 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6667 Reloc_section
* rela_dyn
6668 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6670 if (gsym
->can_use_relative_reloc(false)
6672 || target
->abiversion() >= 2)
6673 && gsym
->visibility() == elfcpp::STV_PROTECTED
6674 && parameters
->options().shared()))
6676 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6677 : elfcpp::R_POWERPC_RELATIVE
);
6678 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6682 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6683 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6689 case elfcpp::R_PPC64_TOC16
:
6690 case elfcpp::R_PPC64_TOC16_LO
:
6691 case elfcpp::R_PPC64_TOC16_HI
:
6692 case elfcpp::R_PPC64_TOC16_HA
:
6693 case elfcpp::R_PPC64_TOC16_DS
:
6694 case elfcpp::R_PPC64_TOC16_LO_DS
:
6695 // We need a GOT section.
6696 target
->got_section(symtab
, layout
);
6699 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6700 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6701 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6702 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6704 const bool final
= gsym
->final_value_is_known();
6705 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6706 if (tls_type
== tls::TLSOPT_NONE
)
6708 Output_data_got_powerpc
<size
, big_endian
>* got
6709 = target
->got_section(symtab
, layout
);
6710 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6711 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6712 elfcpp::R_POWERPC_DTPMOD
,
6713 elfcpp::R_POWERPC_DTPREL
);
6715 else if (tls_type
== tls::TLSOPT_TO_IE
)
6717 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6719 Output_data_got_powerpc
<size
, big_endian
>* got
6720 = target
->got_section(symtab
, layout
);
6721 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6722 if (gsym
->is_undefined()
6723 || gsym
->is_from_dynobj())
6725 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6726 elfcpp::R_POWERPC_TPREL
);
6730 unsigned int off
= got
->add_constant(0);
6731 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6732 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6733 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6738 else if (tls_type
== tls::TLSOPT_TO_LE
)
6740 // no GOT relocs needed for Local Exec.
6747 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6748 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6749 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6750 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6752 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6753 if (tls_type
== tls::TLSOPT_NONE
)
6754 target
->tlsld_got_offset(symtab
, layout
, object
);
6755 else if (tls_type
== tls::TLSOPT_TO_LE
)
6757 // no GOT relocs needed for Local Exec.
6758 if (parameters
->options().emit_relocs())
6760 Output_section
* os
= layout
->tls_segment()->first_section();
6761 gold_assert(os
!= NULL
);
6762 os
->set_needs_symtab_index();
6770 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6771 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6772 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6773 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6775 Output_data_got_powerpc
<size
, big_endian
>* got
6776 = target
->got_section(symtab
, layout
);
6777 if (!gsym
->final_value_is_known()
6778 && (gsym
->is_from_dynobj()
6779 || gsym
->is_undefined()
6780 || gsym
->is_preemptible()))
6781 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6782 target
->rela_dyn_section(layout
),
6783 elfcpp::R_POWERPC_DTPREL
);
6785 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6789 case elfcpp::R_POWERPC_GOT_TPREL16
:
6790 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6791 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6792 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6794 const bool final
= gsym
->final_value_is_known();
6795 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6796 if (tls_type
== tls::TLSOPT_NONE
)
6798 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6800 Output_data_got_powerpc
<size
, big_endian
>* got
6801 = target
->got_section(symtab
, layout
);
6802 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6803 if (gsym
->is_undefined()
6804 || gsym
->is_from_dynobj())
6806 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6807 elfcpp::R_POWERPC_TPREL
);
6811 unsigned int off
= got
->add_constant(0);
6812 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6813 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6814 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6819 else if (tls_type
== tls::TLSOPT_TO_LE
)
6821 // no GOT relocs needed for Local Exec.
6829 unsupported_reloc_global(object
, r_type
, gsym
);
6834 && parameters
->options().toc_optimize())
6836 if (data_shndx
== ppc_object
->toc_shndx())
6839 if (r_type
!= elfcpp::R_PPC64_ADDR64
6840 || (is_ifunc
&& target
->abiversion() < 2))
6842 else if (parameters
->options().output_is_position_independent()
6843 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
6846 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6849 enum {no_check
, check_lo
, check_ha
} insn_check
;
6853 insn_check
= no_check
;
6856 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6857 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6858 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6859 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6860 case elfcpp::R_POWERPC_GOT16_HA
:
6861 case elfcpp::R_PPC64_TOC16_HA
:
6862 insn_check
= check_ha
;
6865 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6866 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6867 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6868 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6869 case elfcpp::R_POWERPC_GOT16_LO
:
6870 case elfcpp::R_PPC64_GOT16_LO_DS
:
6871 case elfcpp::R_PPC64_TOC16_LO
:
6872 case elfcpp::R_PPC64_TOC16_LO_DS
:
6873 insn_check
= check_lo
;
6877 section_size_type slen
;
6878 const unsigned char* view
= NULL
;
6879 if (insn_check
!= no_check
)
6881 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6882 section_size_type off
=
6883 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6886 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6887 if (insn_check
== check_lo
6888 ? !ok_lo_toc_insn(insn
, r_type
)
6889 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6890 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6892 ppc_object
->set_no_toc_opt();
6893 gold_warning(_("%s: toc optimization is not supported "
6894 "for %#08x instruction"),
6895 ppc_object
->name().c_str(), insn
);
6904 case elfcpp::R_PPC64_TOC16
:
6905 case elfcpp::R_PPC64_TOC16_LO
:
6906 case elfcpp::R_PPC64_TOC16_HI
:
6907 case elfcpp::R_PPC64_TOC16_HA
:
6908 case elfcpp::R_PPC64_TOC16_DS
:
6909 case elfcpp::R_PPC64_TOC16_LO_DS
:
6910 if (gsym
->source() == Symbol::FROM_OBJECT
6911 && !gsym
->object()->is_dynamic())
6913 Powerpc_relobj
<size
, big_endian
>* sym_object
6914 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6916 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
6917 if (shndx
== sym_object
->toc_shndx())
6919 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
6920 Address dst_off
= sym
->value() + reloc
.get_r_offset();
6921 if (dst_off
< sym_object
->section_size(shndx
))
6924 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6926 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6928 // Need to check that the insn is a ld
6930 view
= ppc_object
->section_contents(data_shndx
,
6933 section_size_type off
=
6934 (convert_to_section_size_type(reloc
.get_r_offset())
6935 + (big_endian
? -2 : 3));
6937 && (view
[off
] & (0x3f << 2)) == (58u << 2))
6941 sym_object
->set_no_toc_opt(dst_off
);
6953 case elfcpp::R_PPC_LOCAL24PC
:
6954 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
6955 gold_error(_("%s: unsupported -mbss-plt code"),
6956 ppc_object
->name().c_str());
6965 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6966 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6967 case elfcpp::R_POWERPC_GOT_TPREL16
:
6968 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6969 case elfcpp::R_POWERPC_GOT16
:
6970 case elfcpp::R_PPC64_GOT16_DS
:
6971 case elfcpp::R_PPC64_TOC16
:
6972 case elfcpp::R_PPC64_TOC16_DS
:
6973 ppc_object
->set_has_small_toc_reloc();
6979 // Process relocations for gc.
6981 template<int size
, bool big_endian
>
6983 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6984 Symbol_table
* symtab
,
6986 Sized_relobj_file
<size
, big_endian
>* object
,
6987 unsigned int data_shndx
,
6989 const unsigned char* prelocs
,
6991 Output_section
* output_section
,
6992 bool needs_special_offset_handling
,
6993 size_t local_symbol_count
,
6994 const unsigned char* plocal_symbols
)
6996 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6997 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7000 Powerpc_relobj
<size
, big_endian
>* ppc_object
7001 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7003 ppc_object
->set_opd_valid();
7004 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7006 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7007 for (p
= ppc_object
->access_from_map()->begin();
7008 p
!= ppc_object
->access_from_map()->end();
7011 Address dst_off
= p
->first
;
7012 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7013 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7014 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7016 Relobj
* src_obj
= s
->first
;
7017 unsigned int src_indx
= s
->second
;
7018 symtab
->gc()->add_reference(src_obj
, src_indx
,
7019 ppc_object
, dst_indx
);
7023 ppc_object
->access_from_map()->clear();
7024 ppc_object
->process_gc_mark(symtab
);
7025 // Don't look at .opd relocs as .opd will reference everything.
7029 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7038 needs_special_offset_handling
,
7043 // Handle target specific gc actions when adding a gc reference from
7044 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7045 // and DST_OFF. For powerpc64, this adds a referenc to the code
7046 // section of a function descriptor.
7048 template<int size
, bool big_endian
>
7050 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7051 Symbol_table
* symtab
,
7053 unsigned int src_shndx
,
7055 unsigned int dst_shndx
,
7056 Address dst_off
) const
7058 if (size
!= 64 || dst_obj
->is_dynamic())
7061 Powerpc_relobj
<size
, big_endian
>* ppc_object
7062 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7063 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7065 if (ppc_object
->opd_valid())
7067 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7068 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7072 // If we haven't run scan_opd_relocs, we must delay
7073 // processing this function descriptor reference.
7074 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7079 // Add any special sections for this symbol to the gc work list.
7080 // For powerpc64, this adds the code section of a function
7083 template<int size
, bool big_endian
>
7085 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7086 Symbol_table
* symtab
,
7091 Powerpc_relobj
<size
, big_endian
>* ppc_object
7092 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7094 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7095 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7097 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7098 Address dst_off
= gsym
->value();
7099 if (ppc_object
->opd_valid())
7101 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7102 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7106 ppc_object
->add_gc_mark(dst_off
);
7111 // For a symbol location in .opd, set LOC to the location of the
7114 template<int size
, bool big_endian
>
7116 Target_powerpc
<size
, big_endian
>::do_function_location(
7117 Symbol_location
* loc
) const
7119 if (size
== 64 && loc
->shndx
!= 0)
7121 if (loc
->object
->is_dynamic())
7123 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7124 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7125 if (loc
->shndx
== ppc_object
->opd_shndx())
7128 Address off
= loc
->offset
- ppc_object
->opd_address();
7129 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7130 loc
->offset
= dest_off
;
7135 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7136 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7137 if (loc
->shndx
== ppc_object
->opd_shndx())
7140 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7141 loc
->offset
= dest_off
;
7147 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7148 // compiled with -fsplit-stack. The function calls non-split-stack
7149 // code. Change the function to ensure it has enough stack space to
7150 // call some random function.
7152 template<int size
, bool big_endian
>
7154 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7157 section_offset_type fnoffset
,
7158 section_size_type fnsize
,
7159 const unsigned char* prelocs
,
7161 unsigned char* view
,
7162 section_size_type view_size
,
7164 std::string
* to
) const
7166 // 32-bit not supported.
7170 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7171 prelocs
, reloc_count
, view
, view_size
,
7176 // The function always starts with
7177 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7178 // addis %r12,%r1,-allocate@ha
7179 // addi %r12,%r12,-allocate@l
7181 // but note that the addis or addi may be replaced with a nop
7183 unsigned char *entry
= view
+ fnoffset
;
7184 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7186 if ((insn
& 0xffff0000) == addis_2_12
)
7188 /* Skip ELFv2 global entry code. */
7190 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7193 unsigned char *pinsn
= entry
;
7195 const uint32_t ld_private_ss
= 0xe80d8fc0;
7196 if (insn
== ld_private_ss
)
7198 int32_t allocate
= 0;
7202 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7203 if ((insn
& 0xffff0000) == addis_12_1
)
7204 allocate
+= (insn
& 0xffff) << 16;
7205 else if ((insn
& 0xffff0000) == addi_12_1
7206 || (insn
& 0xffff0000) == addi_12_12
)
7207 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7208 else if (insn
!= nop
)
7211 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7213 int extra
= parameters
->options().split_stack_adjust_size();
7215 if (allocate
>= 0 || extra
< 0)
7217 object
->error(_("split-stack stack size overflow at "
7218 "section %u offset %0zx"),
7219 shndx
, static_cast<size_t>(fnoffset
));
7223 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7224 if (insn
!= addis_12_1
)
7226 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7228 insn
= addi_12_12
| (allocate
& 0xffff);
7229 if (insn
!= addi_12_12
)
7231 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7237 insn
= addi_12_1
| (allocate
& 0xffff);
7238 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7241 if (pinsn
!= entry
+ 12)
7242 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7250 if (!object
->has_no_split_stack())
7251 object
->error(_("failed to match split-stack sequence at "
7252 "section %u offset %0zx"),
7253 shndx
, static_cast<size_t>(fnoffset
));
7257 // Scan relocations for a section.
7259 template<int size
, bool big_endian
>
7261 Target_powerpc
<size
, big_endian
>::scan_relocs(
7262 Symbol_table
* symtab
,
7264 Sized_relobj_file
<size
, big_endian
>* object
,
7265 unsigned int data_shndx
,
7266 unsigned int sh_type
,
7267 const unsigned char* prelocs
,
7269 Output_section
* output_section
,
7270 bool needs_special_offset_handling
,
7271 size_t local_symbol_count
,
7272 const unsigned char* plocal_symbols
)
7274 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7275 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7278 if (sh_type
== elfcpp::SHT_REL
)
7280 gold_error(_("%s: unsupported REL reloc section"),
7281 object
->name().c_str());
7285 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7294 needs_special_offset_handling
,
7299 // Functor class for processing the global symbol table.
7300 // Removes symbols defined on discarded opd entries.
7302 template<bool big_endian
>
7303 class Global_symbol_visitor_opd
7306 Global_symbol_visitor_opd()
7310 operator()(Sized_symbol
<64>* sym
)
7312 if (sym
->has_symtab_index()
7313 || sym
->source() != Symbol::FROM_OBJECT
7314 || !sym
->in_real_elf())
7317 if (sym
->object()->is_dynamic())
7320 Powerpc_relobj
<64, big_endian
>* symobj
7321 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
7322 if (symobj
->opd_shndx() == 0)
7326 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7327 if (shndx
== symobj
->opd_shndx()
7328 && symobj
->get_opd_discard(sym
->value()))
7330 sym
->set_undefined();
7331 sym
->set_visibility(elfcpp::STV_DEFAULT
);
7332 sym
->set_is_defined_in_discarded_section();
7333 sym
->set_symtab_index(-1U);
7338 template<int size
, bool big_endian
>
7340 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
7342 Symbol_table
* symtab
)
7346 Output_data_save_res
<size
, big_endian
>* savres
7347 = new Output_data_save_res
<size
, big_endian
>(symtab
);
7348 this->savres_section_
= savres
;
7349 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
7350 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
7351 savres
, ORDER_TEXT
, false);
7355 // Sort linker created .got section first (for the header), then input
7356 // sections belonging to files using small model code.
7358 template<bool big_endian
>
7359 class Sort_toc_sections
7363 operator()(const Output_section::Input_section
& is1
,
7364 const Output_section::Input_section
& is2
) const
7366 if (!is1
.is_input_section() && is2
.is_input_section())
7369 = (is1
.is_input_section()
7370 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
7371 ->has_small_toc_reloc()));
7373 = (is2
.is_input_section()
7374 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
7375 ->has_small_toc_reloc()));
7376 return small1
&& !small2
;
7380 // Finalize the sections.
7382 template<int size
, bool big_endian
>
7384 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
7386 const Input_objects
*,
7387 Symbol_table
* symtab
)
7389 if (parameters
->doing_static_link())
7391 // At least some versions of glibc elf-init.o have a strong
7392 // reference to __rela_iplt marker syms. A weak ref would be
7394 if (this->iplt_
!= NULL
)
7396 Reloc_section
* rel
= this->iplt_
->rel_plt();
7397 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
7398 Symbol_table::PREDEFINED
, rel
, 0, 0,
7399 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7400 elfcpp::STV_HIDDEN
, 0, false, true);
7401 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
7402 Symbol_table::PREDEFINED
, rel
, 0, 0,
7403 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7404 elfcpp::STV_HIDDEN
, 0, true, true);
7408 symtab
->define_as_constant("__rela_iplt_start", NULL
,
7409 Symbol_table::PREDEFINED
, 0, 0,
7410 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7411 elfcpp::STV_HIDDEN
, 0, true, false);
7412 symtab
->define_as_constant("__rela_iplt_end", NULL
,
7413 Symbol_table::PREDEFINED
, 0, 0,
7414 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7415 elfcpp::STV_HIDDEN
, 0, true, false);
7421 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
7422 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
7424 if (!parameters
->options().relocatable())
7426 this->define_save_restore_funcs(layout
, symtab
);
7428 // Annoyingly, we need to make these sections now whether or
7429 // not we need them. If we delay until do_relax then we
7430 // need to mess with the relaxation machinery checkpointing.
7431 this->got_section(symtab
, layout
);
7432 this->make_brlt_section(layout
);
7434 if (parameters
->options().toc_sort())
7436 Output_section
* os
= this->got_
->output_section();
7437 if (os
!= NULL
&& os
->input_sections().size() > 1)
7438 std::stable_sort(os
->input_sections().begin(),
7439 os
->input_sections().end(),
7440 Sort_toc_sections
<big_endian
>());
7445 // Fill in some more dynamic tags.
7446 Output_data_dynamic
* odyn
= layout
->dynamic_data();
7449 const Reloc_section
* rel_plt
= (this->plt_
== NULL
7451 : this->plt_
->rel_plt());
7452 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
7453 this->rela_dyn_
, true, size
== 32);
7457 if (this->got_
!= NULL
)
7459 this->got_
->finalize_data_size();
7460 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
7461 this->got_
, this->got_
->g_o_t());
7466 if (this->glink_
!= NULL
)
7468 this->glink_
->finalize_data_size();
7469 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
7471 (this->glink_
->pltresolve_size
7477 // Emit any relocs we saved in an attempt to avoid generating COPY
7479 if (this->copy_relocs_
.any_saved_relocs())
7480 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
7483 // Emit any saved relocs, and mark toc entries using any of these
7484 // relocs as not optimizable.
7486 template<int sh_type
, int size
, bool big_endian
>
7488 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
7489 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
7492 && parameters
->options().toc_optimize())
7494 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
7495 Copy_reloc_entries::iterator p
= this->entries_
.begin();
7496 p
!= this->entries_
.end();
7499 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
7502 // If the symbol is no longer defined in a dynamic object,
7503 // then we emitted a COPY relocation. If it is still
7504 // dynamic then we'll need dynamic relocations and thus
7505 // can't optimize toc entries.
7506 if (entry
.sym_
->is_from_dynobj())
7508 Powerpc_relobj
<size
, big_endian
>* ppc_object
7509 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
7510 if (entry
.shndx_
== ppc_object
->toc_shndx())
7511 ppc_object
->set_no_toc_opt(entry
.address_
);
7516 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
7519 // Return the value to use for a branch relocation.
7521 template<int size
, bool big_endian
>
7523 Target_powerpc
<size
, big_endian
>::symval_for_branch(
7524 const Symbol_table
* symtab
,
7525 const Sized_symbol
<size
>* gsym
,
7526 Powerpc_relobj
<size
, big_endian
>* object
,
7528 unsigned int *dest_shndx
)
7530 if (size
== 32 || this->abiversion() >= 2)
7534 // If the symbol is defined in an opd section, ie. is a function
7535 // descriptor, use the function descriptor code entry address
7536 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
7538 && (gsym
->source() != Symbol::FROM_OBJECT
7539 || gsym
->object()->is_dynamic()))
7542 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7543 unsigned int shndx
= symobj
->opd_shndx();
7546 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
7547 if (opd_addr
== invalid_address
)
7549 opd_addr
+= symobj
->output_section_address(shndx
);
7550 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
7553 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
7554 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
7557 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
7558 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
7559 *dest_shndx
= folded
.second
;
7561 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
7562 if (sec_addr
== invalid_address
)
7565 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
7566 *value
= sec_addr
+ sec_off
;
7571 // Perform a relocation.
7573 template<int size
, bool big_endian
>
7575 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
7576 const Relocate_info
<size
, big_endian
>* relinfo
,
7578 Target_powerpc
* target
,
7581 const unsigned char* preloc
,
7582 const Sized_symbol
<size
>* gsym
,
7583 const Symbol_value
<size
>* psymval
,
7584 unsigned char* view
,
7586 section_size_type view_size
)
7591 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
7592 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
7593 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7595 case Track_tls::NOT_EXPECTED
:
7596 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7597 _("__tls_get_addr call lacks marker reloc"));
7599 case Track_tls::EXPECTED
:
7600 // We have already complained.
7602 case Track_tls::SKIP
:
7604 case Track_tls::NORMAL
:
7608 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
7609 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
7610 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
7611 // Offset from start of insn to d-field reloc.
7612 const int d_offset
= big_endian
? 2 : 0;
7614 Powerpc_relobj
<size
, big_endian
>* const object
7615 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7617 bool has_stub_value
= false;
7618 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7620 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7621 : object
->local_has_plt_offset(r_sym
))
7622 && (!psymval
->is_ifunc_symbol()
7623 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7627 && target
->abiversion() >= 2
7628 && !parameters
->options().output_is_position_independent()
7629 && !is_branch_reloc(r_type
))
7631 Address off
= target
->glink_section()->find_global_entry(gsym
);
7632 if (off
!= invalid_address
)
7634 value
= target
->glink_section()->global_entry_address() + off
;
7635 has_stub_value
= true;
7640 Stub_table
<size
, big_endian
>* stub_table
7641 = object
->stub_table(relinfo
->data_shndx
);
7642 if (stub_table
== NULL
)
7644 // This is a ref from a data section to an ifunc symbol.
7645 if (target
->stub_tables().size() != 0)
7646 stub_table
= target
->stub_tables()[0];
7648 if (stub_table
!= NULL
)
7652 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7653 rela
.get_r_addend());
7655 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7656 rela
.get_r_addend());
7657 if (off
!= invalid_address
)
7659 value
= stub_table
->stub_address() + off
;
7660 has_stub_value
= true;
7664 // We don't care too much about bogus debug references to
7665 // non-local functions, but otherwise there had better be a plt
7666 // call stub or global entry stub as appropriate.
7667 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7670 if (r_type
== elfcpp::R_POWERPC_GOT16
7671 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7672 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7673 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7674 || r_type
== elfcpp::R_PPC64_GOT16_DS
7675 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7679 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7680 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7684 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7685 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7687 value
-= target
->got_section()->got_base_offset(object
);
7689 else if (r_type
== elfcpp::R_PPC64_TOC
)
7691 value
= (target
->got_section()->output_section()->address()
7692 + object
->toc_base_offset());
7694 else if (gsym
!= NULL
7695 && (r_type
== elfcpp::R_POWERPC_REL24
7696 || r_type
== elfcpp::R_PPC_PLTREL24
)
7701 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7702 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7703 bool can_plt_call
= false;
7704 if (rela
.get_r_offset() + 8 <= view_size
)
7706 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7707 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7710 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7712 elfcpp::Swap
<32, big_endian
>::
7713 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7714 can_plt_call
= true;
7719 // If we don't have a branch and link followed by a nop,
7720 // we can't go via the plt because there is no place to
7721 // put a toc restoring instruction.
7722 // Unless we know we won't be returning.
7723 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7724 can_plt_call
= true;
7728 // g++ as of 20130507 emits self-calls without a
7729 // following nop. This is arguably wrong since we have
7730 // conflicting information. On the one hand a global
7731 // symbol and on the other a local call sequence, but
7732 // don't error for this special case.
7733 // It isn't possible to cheaply verify we have exactly
7734 // such a call. Allow all calls to the same section.
7736 Address code
= value
;
7737 if (gsym
->source() == Symbol::FROM_OBJECT
7738 && gsym
->object() == object
)
7740 unsigned int dest_shndx
= 0;
7741 if (target
->abiversion() < 2)
7743 Address addend
= rela
.get_r_addend();
7744 code
= psymval
->value(object
, addend
);
7745 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7746 &code
, &dest_shndx
);
7749 if (dest_shndx
== 0)
7750 dest_shndx
= gsym
->shndx(&is_ordinary
);
7751 ok
= dest_shndx
== relinfo
->data_shndx
;
7755 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7756 _("call lacks nop, can't restore toc; "
7757 "recompile with -fPIC"));
7763 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7764 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7765 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7766 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7768 // First instruction of a global dynamic sequence, arg setup insn.
7769 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7770 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7771 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7772 if (tls_type
== tls::TLSOPT_NONE
)
7773 got_type
= GOT_TYPE_TLSGD
;
7774 else if (tls_type
== tls::TLSOPT_TO_IE
)
7775 got_type
= GOT_TYPE_TPREL
;
7776 if (got_type
!= GOT_TYPE_STANDARD
)
7780 gold_assert(gsym
->has_got_offset(got_type
));
7781 value
= gsym
->got_offset(got_type
);
7785 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7786 value
= object
->local_got_offset(r_sym
, got_type
);
7788 value
-= target
->got_section()->got_base_offset(object
);
7790 if (tls_type
== tls::TLSOPT_TO_IE
)
7792 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7793 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7795 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7796 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7797 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7799 insn
|= 32 << 26; // lwz
7801 insn
|= 58 << 26; // ld
7802 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7804 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7805 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7807 else if (tls_type
== tls::TLSOPT_TO_LE
)
7809 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7810 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7812 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7813 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7814 insn
&= (1 << 26) - (1 << 21); // extract rt
7819 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7820 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7821 value
= psymval
->value(object
, rela
.get_r_addend());
7825 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7827 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7828 r_type
= elfcpp::R_POWERPC_NONE
;
7832 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7833 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7834 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7835 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7837 // First instruction of a local dynamic sequence, arg setup insn.
7838 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7839 if (tls_type
== tls::TLSOPT_NONE
)
7841 value
= target
->tlsld_got_offset();
7842 value
-= target
->got_section()->got_base_offset(object
);
7846 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7847 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7848 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7850 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7851 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7852 insn
&= (1 << 26) - (1 << 21); // extract rt
7857 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7858 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7863 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7865 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7866 r_type
= elfcpp::R_POWERPC_NONE
;
7870 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7871 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7872 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7873 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7875 // Accesses relative to a local dynamic sequence address,
7876 // no optimisation here.
7879 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7880 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7884 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7885 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7887 value
-= target
->got_section()->got_base_offset(object
);
7889 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7890 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7891 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7892 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7894 // First instruction of initial exec sequence.
7895 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7896 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7897 if (tls_type
== tls::TLSOPT_NONE
)
7901 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7902 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7906 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7907 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7909 value
-= target
->got_section()->got_base_offset(object
);
7913 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7914 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7915 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7917 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7918 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7919 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7924 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7925 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7926 value
= psymval
->value(object
, rela
.get_r_addend());
7930 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7932 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7933 r_type
= elfcpp::R_POWERPC_NONE
;
7937 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7938 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7940 // Second instruction of a global dynamic sequence,
7941 // the __tls_get_addr call
7942 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7943 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7944 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7945 if (tls_type
!= tls::TLSOPT_NONE
)
7947 if (tls_type
== tls::TLSOPT_TO_IE
)
7949 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7950 Insn insn
= add_3_3_13
;
7953 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7954 r_type
= elfcpp::R_POWERPC_NONE
;
7958 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7959 Insn insn
= addi_3_3
;
7960 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7961 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7963 value
= psymval
->value(object
, rela
.get_r_addend());
7965 this->skip_next_tls_get_addr_call();
7968 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7969 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7971 // Second instruction of a local dynamic sequence,
7972 // the __tls_get_addr call
7973 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7974 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7975 if (tls_type
== tls::TLSOPT_TO_LE
)
7977 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7978 Insn insn
= addi_3_3
;
7979 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7980 this->skip_next_tls_get_addr_call();
7981 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7986 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7988 // Second instruction of an initial exec sequence
7989 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7990 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7991 if (tls_type
== tls::TLSOPT_TO_LE
)
7993 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7994 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7995 unsigned int reg
= size
== 32 ? 2 : 13;
7996 insn
= at_tls_transform(insn
, reg
);
7997 gold_assert(insn
!= 0);
7998 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7999 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8001 value
= psymval
->value(object
, rela
.get_r_addend());
8004 else if (!has_stub_value
)
8007 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8008 addend
= rela
.get_r_addend();
8009 value
= psymval
->value(object
, addend
);
8010 if (size
== 64 && is_branch_reloc(r_type
))
8012 if (target
->abiversion() >= 2)
8015 value
+= object
->ppc64_local_entry_offset(gsym
);
8017 value
+= object
->ppc64_local_entry_offset(r_sym
);
8021 unsigned int dest_shndx
;
8022 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8023 &value
, &dest_shndx
);
8026 Address max_branch_offset
= max_branch_delta(r_type
);
8027 if (max_branch_offset
!= 0
8028 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8030 Stub_table
<size
, big_endian
>* stub_table
8031 = object
->stub_table(relinfo
->data_shndx
);
8032 if (stub_table
!= NULL
)
8034 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8035 if (off
!= invalid_address
)
8037 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8039 has_stub_value
= true;
8047 case elfcpp::R_PPC64_REL64
:
8048 case elfcpp::R_POWERPC_REL32
:
8049 case elfcpp::R_POWERPC_REL24
:
8050 case elfcpp::R_PPC_PLTREL24
:
8051 case elfcpp::R_PPC_LOCAL24PC
:
8052 case elfcpp::R_POWERPC_REL16
:
8053 case elfcpp::R_POWERPC_REL16_LO
:
8054 case elfcpp::R_POWERPC_REL16_HI
:
8055 case elfcpp::R_POWERPC_REL16_HA
:
8056 case elfcpp::R_POWERPC_REL16DX_HA
:
8057 case elfcpp::R_POWERPC_REL14
:
8058 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8059 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8063 case elfcpp::R_PPC64_TOC16
:
8064 case elfcpp::R_PPC64_TOC16_LO
:
8065 case elfcpp::R_PPC64_TOC16_HI
:
8066 case elfcpp::R_PPC64_TOC16_HA
:
8067 case elfcpp::R_PPC64_TOC16_DS
:
8068 case elfcpp::R_PPC64_TOC16_LO_DS
:
8069 // Subtract the TOC base address.
8070 value
-= (target
->got_section()->output_section()->address()
8071 + object
->toc_base_offset());
8074 case elfcpp::R_POWERPC_SECTOFF
:
8075 case elfcpp::R_POWERPC_SECTOFF_LO
:
8076 case elfcpp::R_POWERPC_SECTOFF_HI
:
8077 case elfcpp::R_POWERPC_SECTOFF_HA
:
8078 case elfcpp::R_PPC64_SECTOFF_DS
:
8079 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8081 value
-= os
->address();
8084 case elfcpp::R_PPC64_TPREL16_DS
:
8085 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8086 case elfcpp::R_PPC64_TPREL16_HIGH
:
8087 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8089 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8092 case elfcpp::R_POWERPC_TPREL16
:
8093 case elfcpp::R_POWERPC_TPREL16_LO
:
8094 case elfcpp::R_POWERPC_TPREL16_HI
:
8095 case elfcpp::R_POWERPC_TPREL16_HA
:
8096 case elfcpp::R_POWERPC_TPREL
:
8097 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8098 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8099 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8100 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8101 // tls symbol values are relative to tls_segment()->vaddr()
8105 case elfcpp::R_PPC64_DTPREL16_DS
:
8106 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8107 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8108 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8109 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8110 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8112 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8113 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8116 case elfcpp::R_POWERPC_DTPREL16
:
8117 case elfcpp::R_POWERPC_DTPREL16_LO
:
8118 case elfcpp::R_POWERPC_DTPREL16_HI
:
8119 case elfcpp::R_POWERPC_DTPREL16_HA
:
8120 case elfcpp::R_POWERPC_DTPREL
:
8121 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8122 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8123 // tls symbol values are relative to tls_segment()->vaddr()
8124 value
-= dtp_offset
;
8127 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8129 value
+= object
->ppc64_local_entry_offset(gsym
);
8131 value
+= object
->ppc64_local_entry_offset(r_sym
);
8138 Insn branch_bit
= 0;
8141 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8142 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8143 branch_bit
= 1 << 21;
8145 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8146 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8148 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8149 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8152 if (this->is_isa_v2
)
8154 // Set 'a' bit. This is 0b00010 in BO field for branch
8155 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8156 // for branch on CTR insns (BO == 1a00t or 1a01t).
8157 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8159 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8166 // Invert 'y' bit if not the default.
8167 if (static_cast<Signed_address
>(value
) < 0)
8170 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8185 // Multi-instruction sequences that access the GOT/TOC can
8186 // be optimized, eg.
8187 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8188 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8190 // addis ra,r2,0; addi rb,ra,x@toc@l;
8191 // to nop; addi rb,r2,x@toc;
8192 // FIXME: the @got sequence shown above is not yet
8193 // optimized. Note that gcc as of 2017-01-07 doesn't use
8194 // the ELF @got relocs except for TLS, instead using the
8195 // PowerOpen variant of a compiler managed GOT (called TOC).
8196 // The PowerOpen TOC sequence equivalent to the first
8197 // example is optimized.
8198 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8199 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8200 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8201 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8202 case elfcpp::R_POWERPC_GOT16_HA
:
8203 case elfcpp::R_PPC64_TOC16_HA
:
8204 if (parameters
->options().toc_optimize())
8206 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8207 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8208 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8209 && object
->make_toc_relative(target
, &value
))
8211 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8212 == ((15u << 26) | (2 << 16)));
8214 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8215 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8216 && value
+ 0x8000 < 0x10000)
8218 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8224 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8225 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8226 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8227 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8228 case elfcpp::R_POWERPC_GOT16_LO
:
8229 case elfcpp::R_PPC64_GOT16_LO_DS
:
8230 case elfcpp::R_PPC64_TOC16_LO
:
8231 case elfcpp::R_PPC64_TOC16_LO_DS
:
8232 if (parameters
->options().toc_optimize())
8234 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8235 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8236 bool changed
= false;
8237 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
8238 && object
->make_toc_relative(target
, &value
))
8240 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
8241 insn
^= (14u << 26) ^ (58u << 26);
8242 r_type
= elfcpp::R_PPC64_TOC16_LO
;
8245 if (ok_lo_toc_insn(insn
, r_type
)
8246 && value
+ 0x8000 < 0x10000)
8248 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
8250 // Transform addic to addi when we change reg.
8251 insn
&= ~((0x3f << 26) | (0x1f << 16));
8252 insn
|= (14u << 26) | (2 << 16);
8256 insn
&= ~(0x1f << 16);
8262 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8266 case elfcpp::R_PPC64_ENTRY
:
8267 value
= (target
->got_section()->output_section()->address()
8268 + object
->toc_base_offset());
8269 if (value
+ 0x80008000 <= 0xffffffff
8270 && !parameters
->options().output_is_position_independent())
8272 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8273 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8274 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8276 if ((insn1
& ~0xfffc) == ld_2_12
8277 && insn2
== add_2_2_12
)
8279 insn1
= lis_2
+ ha(value
);
8280 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8281 insn2
= addi_2_2
+ l(value
);
8282 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8289 if (value
+ 0x80008000 <= 0xffffffff)
8291 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8292 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8293 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8295 if ((insn1
& ~0xfffc) == ld_2_12
8296 && insn2
== add_2_2_12
)
8298 insn1
= addis_2_12
+ ha(value
);
8299 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8300 insn2
= addi_2_2
+ l(value
);
8301 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8308 case elfcpp::R_POWERPC_REL16_LO
:
8309 // If we are generating a non-PIC executable, edit
8310 // 0: addis 2,12,.TOC.-0b@ha
8311 // addi 2,2,.TOC.-0b@l
8312 // used by ELFv2 global entry points to set up r2, to
8315 // if .TOC. is in range. */
8316 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
8319 && target
->abiversion() >= 2
8320 && !parameters
->options().output_is_position_independent()
8321 && rela
.get_r_addend() == d_offset
+ 4
8323 && strcmp(gsym
->name(), ".TOC.") == 0)
8325 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8326 Reltype
prev_rela(preloc
- reloc_size
);
8327 if ((prev_rela
.get_r_info()
8328 == elfcpp::elf_r_info
<size
>(r_sym
,
8329 elfcpp::R_POWERPC_REL16_HA
))
8330 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
8331 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
8333 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8334 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
8335 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8337 if ((insn1
& 0xffff0000) == addis_2_12
8338 && (insn2
& 0xffff0000) == addi_2_2
)
8340 insn1
= lis_2
+ ha(value
+ address
- 4);
8341 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
8342 insn2
= addi_2_2
+ l(value
+ address
- 4);
8343 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
8346 relinfo
->rr
->set_strategy(relnum
- 1,
8347 Relocatable_relocs::RELOC_SPECIAL
);
8348 relinfo
->rr
->set_strategy(relnum
,
8349 Relocatable_relocs::RELOC_SPECIAL
);
8359 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
8360 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
8363 case elfcpp::R_POWERPC_ADDR32
:
8364 case elfcpp::R_POWERPC_UADDR32
:
8366 overflow
= Reloc::CHECK_BITFIELD
;
8369 case elfcpp::R_POWERPC_REL32
:
8370 case elfcpp::R_POWERPC_REL16DX_HA
:
8372 overflow
= Reloc::CHECK_SIGNED
;
8375 case elfcpp::R_POWERPC_UADDR16
:
8376 overflow
= Reloc::CHECK_BITFIELD
;
8379 case elfcpp::R_POWERPC_ADDR16
:
8380 // We really should have three separate relocations,
8381 // one for 16-bit data, one for insns with 16-bit signed fields,
8382 // and one for insns with 16-bit unsigned fields.
8383 overflow
= Reloc::CHECK_BITFIELD
;
8384 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
8385 overflow
= Reloc::CHECK_LOW_INSN
;
8388 case elfcpp::R_POWERPC_ADDR16_HI
:
8389 case elfcpp::R_POWERPC_ADDR16_HA
:
8390 case elfcpp::R_POWERPC_GOT16_HI
:
8391 case elfcpp::R_POWERPC_GOT16_HA
:
8392 case elfcpp::R_POWERPC_PLT16_HI
:
8393 case elfcpp::R_POWERPC_PLT16_HA
:
8394 case elfcpp::R_POWERPC_SECTOFF_HI
:
8395 case elfcpp::R_POWERPC_SECTOFF_HA
:
8396 case elfcpp::R_PPC64_TOC16_HI
:
8397 case elfcpp::R_PPC64_TOC16_HA
:
8398 case elfcpp::R_PPC64_PLTGOT16_HI
:
8399 case elfcpp::R_PPC64_PLTGOT16_HA
:
8400 case elfcpp::R_POWERPC_TPREL16_HI
:
8401 case elfcpp::R_POWERPC_TPREL16_HA
:
8402 case elfcpp::R_POWERPC_DTPREL16_HI
:
8403 case elfcpp::R_POWERPC_DTPREL16_HA
:
8404 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8405 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8406 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8407 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8408 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8409 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8410 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8411 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8412 case elfcpp::R_POWERPC_REL16_HI
:
8413 case elfcpp::R_POWERPC_REL16_HA
:
8415 overflow
= Reloc::CHECK_HIGH_INSN
;
8418 case elfcpp::R_POWERPC_REL16
:
8419 case elfcpp::R_PPC64_TOC16
:
8420 case elfcpp::R_POWERPC_GOT16
:
8421 case elfcpp::R_POWERPC_SECTOFF
:
8422 case elfcpp::R_POWERPC_TPREL16
:
8423 case elfcpp::R_POWERPC_DTPREL16
:
8424 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8425 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8426 case elfcpp::R_POWERPC_GOT_TPREL16
:
8427 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8428 overflow
= Reloc::CHECK_LOW_INSN
;
8431 case elfcpp::R_POWERPC_ADDR24
:
8432 case elfcpp::R_POWERPC_ADDR14
:
8433 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8434 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8435 case elfcpp::R_PPC64_ADDR16_DS
:
8436 case elfcpp::R_POWERPC_REL24
:
8437 case elfcpp::R_PPC_PLTREL24
:
8438 case elfcpp::R_PPC_LOCAL24PC
:
8439 case elfcpp::R_PPC64_TPREL16_DS
:
8440 case elfcpp::R_PPC64_DTPREL16_DS
:
8441 case elfcpp::R_PPC64_TOC16_DS
:
8442 case elfcpp::R_PPC64_GOT16_DS
:
8443 case elfcpp::R_PPC64_SECTOFF_DS
:
8444 case elfcpp::R_POWERPC_REL14
:
8445 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8446 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8447 overflow
= Reloc::CHECK_SIGNED
;
8451 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8454 if (overflow
== Reloc::CHECK_LOW_INSN
8455 || overflow
== Reloc::CHECK_HIGH_INSN
)
8457 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8459 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
8460 overflow
= Reloc::CHECK_BITFIELD
;
8461 else if (overflow
== Reloc::CHECK_LOW_INSN
8462 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
8463 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
8464 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
8465 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
8466 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
8467 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
8468 overflow
= Reloc::CHECK_UNSIGNED
;
8470 overflow
= Reloc::CHECK_SIGNED
;
8473 bool maybe_dq_reloc
= false;
8474 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
8475 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
8478 case elfcpp::R_POWERPC_NONE
:
8479 case elfcpp::R_POWERPC_TLS
:
8480 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
8481 case elfcpp::R_POWERPC_GNU_VTENTRY
:
8484 case elfcpp::R_PPC64_ADDR64
:
8485 case elfcpp::R_PPC64_REL64
:
8486 case elfcpp::R_PPC64_TOC
:
8487 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8488 Reloc::addr64(view
, value
);
8491 case elfcpp::R_POWERPC_TPREL
:
8492 case elfcpp::R_POWERPC_DTPREL
:
8494 Reloc::addr64(view
, value
);
8496 status
= Reloc::addr32(view
, value
, overflow
);
8499 case elfcpp::R_PPC64_UADDR64
:
8500 Reloc::addr64_u(view
, value
);
8503 case elfcpp::R_POWERPC_ADDR32
:
8504 status
= Reloc::addr32(view
, value
, overflow
);
8507 case elfcpp::R_POWERPC_REL32
:
8508 case elfcpp::R_POWERPC_UADDR32
:
8509 status
= Reloc::addr32_u(view
, value
, overflow
);
8512 case elfcpp::R_POWERPC_ADDR24
:
8513 case elfcpp::R_POWERPC_REL24
:
8514 case elfcpp::R_PPC_PLTREL24
:
8515 case elfcpp::R_PPC_LOCAL24PC
:
8516 status
= Reloc::addr24(view
, value
, overflow
);
8519 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8520 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8521 case elfcpp::R_POWERPC_GOT_TPREL16
:
8522 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8525 // On ppc64 these are all ds form
8526 maybe_dq_reloc
= true;
8530 case elfcpp::R_POWERPC_ADDR16
:
8531 case elfcpp::R_POWERPC_REL16
:
8532 case elfcpp::R_PPC64_TOC16
:
8533 case elfcpp::R_POWERPC_GOT16
:
8534 case elfcpp::R_POWERPC_SECTOFF
:
8535 case elfcpp::R_POWERPC_TPREL16
:
8536 case elfcpp::R_POWERPC_DTPREL16
:
8537 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8538 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8539 case elfcpp::R_POWERPC_ADDR16_LO
:
8540 case elfcpp::R_POWERPC_REL16_LO
:
8541 case elfcpp::R_PPC64_TOC16_LO
:
8542 case elfcpp::R_POWERPC_GOT16_LO
:
8543 case elfcpp::R_POWERPC_SECTOFF_LO
:
8544 case elfcpp::R_POWERPC_TPREL16_LO
:
8545 case elfcpp::R_POWERPC_DTPREL16_LO
:
8546 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8547 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8549 status
= Reloc::addr16(view
, value
, overflow
);
8551 maybe_dq_reloc
= true;
8554 case elfcpp::R_POWERPC_UADDR16
:
8555 status
= Reloc::addr16_u(view
, value
, overflow
);
8558 case elfcpp::R_PPC64_ADDR16_HIGH
:
8559 case elfcpp::R_PPC64_TPREL16_HIGH
:
8560 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8562 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
8565 case elfcpp::R_POWERPC_ADDR16_HI
:
8566 case elfcpp::R_POWERPC_REL16_HI
:
8567 case elfcpp::R_PPC64_TOC16_HI
:
8568 case elfcpp::R_POWERPC_GOT16_HI
:
8569 case elfcpp::R_POWERPC_SECTOFF_HI
:
8570 case elfcpp::R_POWERPC_TPREL16_HI
:
8571 case elfcpp::R_POWERPC_DTPREL16_HI
:
8572 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8573 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8574 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8575 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8576 Reloc::addr16_hi(view
, value
);
8579 case elfcpp::R_PPC64_ADDR16_HIGHA
:
8580 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8581 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8583 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
8586 case elfcpp::R_POWERPC_ADDR16_HA
:
8587 case elfcpp::R_POWERPC_REL16_HA
:
8588 case elfcpp::R_PPC64_TOC16_HA
:
8589 case elfcpp::R_POWERPC_GOT16_HA
:
8590 case elfcpp::R_POWERPC_SECTOFF_HA
:
8591 case elfcpp::R_POWERPC_TPREL16_HA
:
8592 case elfcpp::R_POWERPC_DTPREL16_HA
:
8593 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8594 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8595 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8596 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8597 Reloc::addr16_ha(view
, value
);
8600 case elfcpp::R_POWERPC_REL16DX_HA
:
8601 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
8604 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8606 // R_PPC_EMB_NADDR16_LO
8609 case elfcpp::R_PPC64_ADDR16_HIGHER
:
8610 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8611 Reloc::addr16_hi2(view
, value
);
8614 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8616 // R_PPC_EMB_NADDR16_HI
8619 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
8620 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8621 Reloc::addr16_ha2(view
, value
);
8624 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8626 // R_PPC_EMB_NADDR16_HA
8629 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
8630 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8631 Reloc::addr16_hi3(view
, value
);
8634 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8639 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
8640 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8641 Reloc::addr16_ha3(view
, value
);
8644 case elfcpp::R_PPC64_DTPREL16_DS
:
8645 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8647 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
8650 case elfcpp::R_PPC64_TPREL16_DS
:
8651 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8653 // R_PPC_TLSGD, R_PPC_TLSLD
8656 case elfcpp::R_PPC64_ADDR16_DS
:
8657 case elfcpp::R_PPC64_ADDR16_LO_DS
:
8658 case elfcpp::R_PPC64_TOC16_DS
:
8659 case elfcpp::R_PPC64_TOC16_LO_DS
:
8660 case elfcpp::R_PPC64_GOT16_DS
:
8661 case elfcpp::R_PPC64_GOT16_LO_DS
:
8662 case elfcpp::R_PPC64_SECTOFF_DS
:
8663 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8664 maybe_dq_reloc
= true;
8667 case elfcpp::R_POWERPC_ADDR14
:
8668 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8669 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8670 case elfcpp::R_POWERPC_REL14
:
8671 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8672 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8673 status
= Reloc::addr14(view
, value
, overflow
);
8676 case elfcpp::R_POWERPC_COPY
:
8677 case elfcpp::R_POWERPC_GLOB_DAT
:
8678 case elfcpp::R_POWERPC_JMP_SLOT
:
8679 case elfcpp::R_POWERPC_RELATIVE
:
8680 case elfcpp::R_POWERPC_DTPMOD
:
8681 case elfcpp::R_PPC64_JMP_IREL
:
8682 case elfcpp::R_POWERPC_IRELATIVE
:
8683 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8684 _("unexpected reloc %u in object file"),
8688 case elfcpp::R_PPC_EMB_SDA21
:
8693 // R_PPC64_TOCSAVE. For the time being this can be ignored.
8697 case elfcpp::R_PPC_EMB_SDA2I16
:
8698 case elfcpp::R_PPC_EMB_SDA2REL
:
8701 // R_PPC64_TLSGD, R_PPC64_TLSLD
8704 case elfcpp::R_POWERPC_PLT32
:
8705 case elfcpp::R_POWERPC_PLTREL32
:
8706 case elfcpp::R_POWERPC_PLT16_LO
:
8707 case elfcpp::R_POWERPC_PLT16_HI
:
8708 case elfcpp::R_POWERPC_PLT16_HA
:
8709 case elfcpp::R_PPC_SDAREL16
:
8710 case elfcpp::R_POWERPC_ADDR30
:
8711 case elfcpp::R_PPC64_PLT64
:
8712 case elfcpp::R_PPC64_PLTREL64
:
8713 case elfcpp::R_PPC64_PLTGOT16
:
8714 case elfcpp::R_PPC64_PLTGOT16_LO
:
8715 case elfcpp::R_PPC64_PLTGOT16_HI
:
8716 case elfcpp::R_PPC64_PLTGOT16_HA
:
8717 case elfcpp::R_PPC64_PLT16_LO_DS
:
8718 case elfcpp::R_PPC64_PLTGOT16_DS
:
8719 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
8720 case elfcpp::R_PPC_EMB_RELSDA
:
8721 case elfcpp::R_PPC_TOC16
:
8724 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8725 _("unsupported reloc %u"),
8733 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8735 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
8736 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8737 && (insn
& 3) == 1))
8738 status
= Reloc::addr16_dq(view
, value
, overflow
);
8740 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8741 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8742 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
8743 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
8744 status
= Reloc::addr16_ds(view
, value
, overflow
);
8746 status
= Reloc::addr16(view
, value
, overflow
);
8749 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
8752 && gsym
->is_undefined()
8753 && is_branch_reloc(r_type
))))
8755 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8756 _("relocation overflow"));
8758 gold_info(_("try relinking with a smaller --stub-group-size"));
8764 // Relocate section data.
8766 template<int size
, bool big_endian
>
8768 Target_powerpc
<size
, big_endian
>::relocate_section(
8769 const Relocate_info
<size
, big_endian
>* relinfo
,
8770 unsigned int sh_type
,
8771 const unsigned char* prelocs
,
8773 Output_section
* output_section
,
8774 bool needs_special_offset_handling
,
8775 unsigned char* view
,
8777 section_size_type view_size
,
8778 const Reloc_symbol_changes
* reloc_symbol_changes
)
8780 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8781 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8782 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8783 Powerpc_comdat_behavior
;
8784 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8787 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8789 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
8790 Powerpc_comdat_behavior
, Classify_reloc
>(
8796 needs_special_offset_handling
,
8800 reloc_symbol_changes
);
8803 template<int size
, bool big_endian
>
8804 class Powerpc_scan_relocatable_reloc
8807 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8808 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8809 static const int sh_type
= elfcpp::SHT_RELA
;
8811 // Return the symbol referred to by the relocation.
8812 static inline unsigned int
8813 get_r_sym(const Reltype
* reloc
)
8814 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
8816 // Return the type of the relocation.
8817 static inline unsigned int
8818 get_r_type(const Reltype
* reloc
)
8819 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
8821 // Return the strategy to use for a local symbol which is not a
8822 // section symbol, given the relocation type.
8823 inline Relocatable_relocs::Reloc_strategy
8824 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8826 if (r_type
== 0 && r_sym
== 0)
8827 return Relocatable_relocs::RELOC_DISCARD
;
8828 return Relocatable_relocs::RELOC_COPY
;
8831 // Return the strategy to use for a local symbol which is a section
8832 // symbol, given the relocation type.
8833 inline Relocatable_relocs::Reloc_strategy
8834 local_section_strategy(unsigned int, Relobj
*)
8836 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8839 // Return the strategy to use for a global symbol, given the
8840 // relocation type, the object, and the symbol index.
8841 inline Relocatable_relocs::Reloc_strategy
8842 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8844 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8845 return Relocatable_relocs::RELOC_SPECIAL
;
8846 return Relocatable_relocs::RELOC_COPY
;
8850 // Scan the relocs during a relocatable link.
8852 template<int size
, bool big_endian
>
8854 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8855 Symbol_table
* symtab
,
8857 Sized_relobj_file
<size
, big_endian
>* object
,
8858 unsigned int data_shndx
,
8859 unsigned int sh_type
,
8860 const unsigned char* prelocs
,
8862 Output_section
* output_section
,
8863 bool needs_special_offset_handling
,
8864 size_t local_symbol_count
,
8865 const unsigned char* plocal_symbols
,
8866 Relocatable_relocs
* rr
)
8868 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
8870 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8872 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
8880 needs_special_offset_handling
,
8886 // Scan the relocs for --emit-relocs.
8888 template<int size
, bool big_endian
>
8890 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
8891 Symbol_table
* symtab
,
8893 Sized_relobj_file
<size
, big_endian
>* object
,
8894 unsigned int data_shndx
,
8895 unsigned int sh_type
,
8896 const unsigned char* prelocs
,
8898 Output_section
* output_section
,
8899 bool needs_special_offset_handling
,
8900 size_t local_symbol_count
,
8901 const unsigned char* plocal_syms
,
8902 Relocatable_relocs
* rr
)
8904 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8906 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
8907 Emit_relocs_strategy
;
8909 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8911 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
8919 needs_special_offset_handling
,
8925 // Emit relocations for a section.
8926 // This is a modified version of the function by the same name in
8927 // target-reloc.h. Using relocate_special_relocatable for
8928 // R_PPC_PLTREL24 would require duplication of the entire body of the
8929 // loop, so we may as well duplicate the whole thing.
8931 template<int size
, bool big_endian
>
8933 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8934 const Relocate_info
<size
, big_endian
>* relinfo
,
8935 unsigned int sh_type
,
8936 const unsigned char* prelocs
,
8938 Output_section
* output_section
,
8939 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8941 Address view_address
,
8943 unsigned char* reloc_view
,
8944 section_size_type reloc_view_size
)
8946 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8948 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8949 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
8950 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8951 // Offset from start of insn to d-field reloc.
8952 const int d_offset
= big_endian
? 2 : 0;
8954 Powerpc_relobj
<size
, big_endian
>* const object
8955 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8956 const unsigned int local_count
= object
->local_symbol_count();
8957 unsigned int got2_shndx
= object
->got2_shndx();
8958 Address got2_addend
= 0;
8959 if (got2_shndx
!= 0)
8961 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8962 gold_assert(got2_addend
!= invalid_address
);
8965 unsigned char* pwrite
= reloc_view
;
8966 bool zap_next
= false;
8967 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8969 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
8970 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8973 Reltype
reloc(prelocs
);
8974 Reltype_write
reloc_write(pwrite
);
8976 Address offset
= reloc
.get_r_offset();
8977 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8978 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8979 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8980 const unsigned int orig_r_sym
= r_sym
;
8981 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8982 = reloc
.get_r_addend();
8983 const Symbol
* gsym
= NULL
;
8987 // We could arrange to discard these and other relocs for
8988 // tls optimised sequences in the strategy methods, but for
8989 // now do as BFD ld does.
8990 r_type
= elfcpp::R_POWERPC_NONE
;
8994 // Get the new symbol index.
8995 Output_section
* os
= NULL
;
8996 if (r_sym
< local_count
)
9000 case Relocatable_relocs::RELOC_COPY
:
9001 case Relocatable_relocs::RELOC_SPECIAL
:
9004 r_sym
= object
->symtab_index(r_sym
);
9005 gold_assert(r_sym
!= -1U);
9009 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9011 // We are adjusting a section symbol. We need to find
9012 // the symbol table index of the section symbol for
9013 // the output section corresponding to input section
9014 // in which this symbol is defined.
9015 gold_assert(r_sym
< local_count
);
9017 unsigned int shndx
=
9018 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9019 gold_assert(is_ordinary
);
9020 os
= object
->output_section(shndx
);
9021 gold_assert(os
!= NULL
);
9022 gold_assert(os
->needs_symtab_index());
9023 r_sym
= os
->symtab_index();
9033 gsym
= object
->global_symbol(r_sym
);
9034 gold_assert(gsym
!= NULL
);
9035 if (gsym
->is_forwarder())
9036 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9038 gold_assert(gsym
->has_symtab_index());
9039 r_sym
= gsym
->symtab_index();
9042 // Get the new offset--the location in the output section where
9043 // this relocation should be applied.
9044 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9045 offset
+= offset_in_output_section
;
9048 section_offset_type sot_offset
=
9049 convert_types
<section_offset_type
, Address
>(offset
);
9050 section_offset_type new_sot_offset
=
9051 output_section
->output_offset(object
, relinfo
->data_shndx
,
9053 gold_assert(new_sot_offset
!= -1);
9054 offset
= new_sot_offset
;
9057 // In an object file, r_offset is an offset within the section.
9058 // In an executable or dynamic object, generated by
9059 // --emit-relocs, r_offset is an absolute address.
9060 if (!parameters
->options().relocatable())
9062 offset
+= view_address
;
9063 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9064 offset
-= offset_in_output_section
;
9067 // Handle the reloc addend based on the strategy.
9068 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9070 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9072 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9073 gold_assert(os
!= NULL
);
9074 addend
= psymval
->value(object
, addend
) - os
->address();
9076 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9080 if (addend
>= 32768)
9081 addend
+= got2_addend
;
9083 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9085 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9088 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9090 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9091 addend
-= d_offset
+ 4;
9097 if (!parameters
->options().relocatable())
9099 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9100 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9101 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9102 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9104 // First instruction of a global dynamic sequence,
9106 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9107 switch (this->optimize_tls_gd(final
))
9109 case tls::TLSOPT_TO_IE
:
9110 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9111 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9113 case tls::TLSOPT_TO_LE
:
9114 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9115 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9116 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9119 r_type
= elfcpp::R_POWERPC_NONE
;
9127 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9128 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9129 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9130 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9132 // First instruction of a local dynamic sequence,
9134 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9136 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9137 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9139 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9140 const Output_section
* os
= relinfo
->layout
->tls_segment()
9142 gold_assert(os
!= NULL
);
9143 gold_assert(os
->needs_symtab_index());
9144 r_sym
= os
->symtab_index();
9145 addend
= dtp_offset
;
9149 r_type
= elfcpp::R_POWERPC_NONE
;
9154 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9155 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9156 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9157 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9159 // First instruction of initial exec sequence.
9160 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9161 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9163 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9164 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9165 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9168 r_type
= elfcpp::R_POWERPC_NONE
;
9173 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9174 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9176 // Second instruction of a global dynamic sequence,
9177 // the __tls_get_addr call
9178 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9179 switch (this->optimize_tls_gd(final
))
9181 case tls::TLSOPT_TO_IE
:
9182 r_type
= elfcpp::R_POWERPC_NONE
;
9185 case tls::TLSOPT_TO_LE
:
9186 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9194 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
9195 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
9197 // Second instruction of a local dynamic sequence,
9198 // the __tls_get_addr call
9199 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9201 const Output_section
* os
= relinfo
->layout
->tls_segment()
9203 gold_assert(os
!= NULL
);
9204 gold_assert(os
->needs_symtab_index());
9205 r_sym
= os
->symtab_index();
9206 addend
= dtp_offset
;
9207 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9212 else if (r_type
== elfcpp::R_POWERPC_TLS
)
9214 // Second instruction of an initial exec sequence
9215 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9216 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9218 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9224 reloc_write
.put_r_offset(offset
);
9225 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
9226 reloc_write
.put_r_addend(addend
);
9228 pwrite
+= reloc_size
;
9231 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
9232 == reloc_view_size
);
9235 // Return the value to use for a dynamic symbol which requires special
9236 // treatment. This is how we support equality comparisons of function
9237 // pointers across shared library boundaries, as described in the
9238 // processor specific ABI supplement.
9240 template<int size
, bool big_endian
>
9242 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
9246 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
9247 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9248 p
!= this->stub_tables_
.end();
9251 Address off
= (*p
)->find_plt_call_entry(gsym
);
9252 if (off
!= invalid_address
)
9253 return (*p
)->stub_address() + off
;
9256 else if (this->abiversion() >= 2)
9258 Address off
= this->glink_section()->find_global_entry(gsym
);
9259 if (off
!= invalid_address
)
9260 return this->glink_section()->global_entry_address() + off
;
9265 // Return the PLT address to use for a local symbol.
9266 template<int size
, bool big_endian
>
9268 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
9269 const Relobj
* object
,
9270 unsigned int symndx
) const
9274 const Sized_relobj
<size
, big_endian
>* relobj
9275 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
9276 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9277 p
!= this->stub_tables_
.end();
9280 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
9282 if (off
!= invalid_address
)
9283 return (*p
)->stub_address() + off
;
9289 // Return the PLT address to use for a global symbol.
9290 template<int size
, bool big_endian
>
9292 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
9293 const Symbol
* gsym
) const
9297 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9298 p
!= this->stub_tables_
.end();
9301 Address off
= (*p
)->find_plt_call_entry(gsym
);
9302 if (off
!= invalid_address
)
9303 return (*p
)->stub_address() + off
;
9306 else if (this->abiversion() >= 2)
9308 Address off
= this->glink_section()->find_global_entry(gsym
);
9309 if (off
!= invalid_address
)
9310 return this->glink_section()->global_entry_address() + off
;
9315 // Return the offset to use for the GOT_INDX'th got entry which is
9316 // for a local tls symbol specified by OBJECT, SYMNDX.
9317 template<int size
, bool big_endian
>
9319 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
9320 const Relobj
* object
,
9321 unsigned int symndx
,
9322 unsigned int got_indx
) const
9324 const Powerpc_relobj
<size
, big_endian
>* ppc_object
9325 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
9326 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
9328 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9329 got_type
<= GOT_TYPE_TPREL
;
9330 got_type
= Got_type(got_type
+ 1))
9331 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
9333 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
9334 if (got_type
== GOT_TYPE_TLSGD
)
9336 if (off
== got_indx
* (size
/ 8))
9338 if (got_type
== GOT_TYPE_TPREL
)
9348 // Return the offset to use for the GOT_INDX'th got entry which is
9349 // for global tls symbol GSYM.
9350 template<int size
, bool big_endian
>
9352 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
9354 unsigned int got_indx
) const
9356 if (gsym
->type() == elfcpp::STT_TLS
)
9358 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9359 got_type
<= GOT_TYPE_TPREL
;
9360 got_type
= Got_type(got_type
+ 1))
9361 if (gsym
->has_got_offset(got_type
))
9363 unsigned int off
= gsym
->got_offset(got_type
);
9364 if (got_type
== GOT_TYPE_TLSGD
)
9366 if (off
== got_indx
* (size
/ 8))
9368 if (got_type
== GOT_TYPE_TPREL
)
9378 // The selector for powerpc object files.
9380 template<int size
, bool big_endian
>
9381 class Target_selector_powerpc
: public Target_selector
9384 Target_selector_powerpc()
9385 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
9388 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
9389 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
9391 ? (big_endian
? "elf64ppc" : "elf64lppc")
9392 : (big_endian
? "elf32ppc" : "elf32lppc")))
9396 do_instantiate_target()
9397 { return new Target_powerpc
<size
, big_endian
>(); }
9400 Target_selector_powerpc
<32, true> target_selector_ppc32
;
9401 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
9402 Target_selector_powerpc
<64, true> target_selector_ppc64
;
9403 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
9405 // Instantiate these constants for -O0
9406 template<int size
, bool big_endian
>
9407 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
9408 template<int size
, bool big_endian
>
9409 const typename Output_data_glink
<size
, big_endian
>::Address
9410 Output_data_glink
<size
, big_endian
>::invalid_address
;
9411 template<int size
, bool big_endian
>
9412 const typename Stub_table
<size
, big_endian
>::Address
9413 Stub_table
<size
, big_endian
>::invalid_address
;
9414 template<int size
, bool big_endian
>
9415 const typename Target_powerpc
<size
, big_endian
>::Address
9416 Target_powerpc
<size
, big_endian
>::invalid_address
;
9418 } // End anonymous namespace.