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 // Convert VALUE back to an address by adding got_base (see below),
1990 // then to an offset in the TOC by subtracting the TOC output
1991 // section address and the TOC output offset. Since this TOC output
1992 // section and the got output section are one and the same, we can
1993 // omit adding and subtracting the output section address.
1994 Address off
= (*value
+ this->toc_base_offset()
1995 - this->output_section_offset(this->toc_shndx()));
1996 // Is this offset in the TOC? -mcmodel=medium code may be using
1997 // TOC relative access to variables outside the TOC. Those of
1998 // course can't be optimized. We also don't try to optimize code
1999 // that is using a different object's TOC.
2000 if (off
>= this->section_size(this->toc_shndx()))
2003 if (this->no_toc_opt(off
))
2006 section_size_type vlen
;
2007 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2008 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2010 Address got_base
= (target
->got_section()->output_section()->address()
2011 + this->toc_base_offset());
2013 if (addr
+ 0x80008000 >= (uint64_t) 1 << 32)
2020 // Perform the Sized_relobj_file method, then set up opd info from
2023 template<int size
, bool big_endian
>
2025 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2027 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2030 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2031 p
!= rd
->relocs
.end();
2034 if (p
->data_shndx
== this->opd_shndx())
2036 uint64_t opd_size
= this->section_size(this->opd_shndx());
2037 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2040 this->init_opd(opd_size
);
2041 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2042 rd
->local_symbols
->data());
2050 // Read the symbols then set up st_other vector.
2052 template<int size
, bool big_endian
>
2054 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2056 this->base_read_symbols(sd
);
2059 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2060 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2061 const unsigned int loccount
= this->do_local_symbol_count();
2064 this->st_other_
.resize(loccount
);
2065 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2066 off_t locsize
= loccount
* sym_size
;
2067 const unsigned int symtab_shndx
= this->symtab_shndx();
2068 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2069 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2070 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2071 locsize
, true, false);
2073 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2075 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2076 unsigned char st_other
= sym
.get_st_other();
2077 this->st_other_
[i
] = st_other
;
2078 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2080 if (this->abiversion() == 0)
2081 this->set_abiversion(2);
2082 else if (this->abiversion() < 2)
2083 gold_error(_("%s: local symbol %d has invalid st_other"
2084 " for ABI version 1"),
2085 this->name().c_str(), i
);
2092 template<int size
, bool big_endian
>
2094 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2096 this->e_flags_
|= ver
;
2097 if (this->abiversion() != 0)
2099 Target_powerpc
<size
, big_endian
>* target
=
2100 static_cast<Target_powerpc
<size
, big_endian
>*>(
2101 parameters
->sized_target
<size
, big_endian
>());
2102 if (target
->abiversion() == 0)
2103 target
->set_abiversion(this->abiversion());
2104 else if (target
->abiversion() != this->abiversion())
2105 gold_error(_("%s: ABI version %d is not compatible "
2106 "with ABI version %d output"),
2107 this->name().c_str(),
2108 this->abiversion(), target
->abiversion());
2113 // Call Sized_dynobj::base_read_symbols to read the symbols then
2114 // read .opd from a dynamic object, filling in opd_ent_ vector,
2116 template<int size
, bool big_endian
>
2118 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2120 this->base_read_symbols(sd
);
2123 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2124 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2125 const unsigned char* namesu
= sd
->section_names
->data();
2126 const char* names
= reinterpret_cast<const char*>(namesu
);
2127 const unsigned char* s
= NULL
;
2128 const unsigned char* opd
;
2129 section_size_type opd_size
;
2131 // Find and read .opd section.
2134 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2135 sd
->section_names_size
,
2140 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2141 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2142 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2144 if (this->abiversion() == 0)
2145 this->set_abiversion(1);
2146 else if (this->abiversion() > 1)
2147 gold_error(_("%s: .opd invalid in abiv%d"),
2148 this->name().c_str(), this->abiversion());
2150 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2151 this->opd_address_
= shdr
.get_sh_addr();
2152 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2153 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2159 // Build set of executable sections.
2160 // Using a set is probably overkill. There is likely to be only
2161 // a few executable sections, typically .init, .text and .fini,
2162 // and they are generally grouped together.
2163 typedef std::set
<Sec_info
> Exec_sections
;
2164 Exec_sections exec_sections
;
2166 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2168 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2169 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2170 && ((shdr
.get_sh_flags()
2171 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2172 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2173 && shdr
.get_sh_size() != 0)
2175 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2176 shdr
.get_sh_size(), i
));
2179 if (exec_sections
.empty())
2182 // Look over the OPD entries. This is complicated by the fact
2183 // that some binaries will use two-word entries while others
2184 // will use the standard three-word entries. In most cases
2185 // the third word (the environment pointer for languages like
2186 // Pascal) is unused and will be zero. If the third word is
2187 // used it should not be pointing into executable sections,
2189 this->init_opd(opd_size
);
2190 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2192 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2193 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2194 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2196 // Chances are that this is the third word of an OPD entry.
2198 typename
Exec_sections::const_iterator e
2199 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2200 if (e
!= exec_sections
.begin())
2203 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2205 // We have an address in an executable section.
2206 // VAL ought to be the function entry, set it up.
2207 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2208 // Skip second word of OPD entry, the TOC pointer.
2212 // If we didn't match any executable sections, we likely
2213 // have a non-zero third word in the OPD entry.
2218 // Relocate sections.
2220 template<int size
, bool big_endian
>
2222 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2223 const Symbol_table
* symtab
, const Layout
* layout
,
2224 const unsigned char* pshdrs
, Output_file
* of
,
2225 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2227 unsigned int start
= 1;
2229 && this->relatoc_
!= 0
2230 && !parameters
->options().relocatable())
2232 // Relocate .toc first.
2233 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2234 this->relatoc_
, this->relatoc_
);
2235 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2236 1, this->relatoc_
- 1);
2237 start
= this->relatoc_
+ 1;
2239 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2240 start
, this->shnum() - 1);
2243 // Set up some symbols.
2245 template<int size
, bool big_endian
>
2247 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2248 Symbol_table
* symtab
,
2253 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2254 // undefined when scanning relocs (and thus requires
2255 // non-relative dynamic relocs). The proper value will be
2257 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2258 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2260 Target_powerpc
<size
, big_endian
>* target
=
2261 static_cast<Target_powerpc
<size
, big_endian
>*>(
2262 parameters
->sized_target
<size
, big_endian
>());
2263 Output_data_got_powerpc
<size
, big_endian
>* got
2264 = target
->got_section(symtab
, layout
);
2265 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2266 Symbol_table::PREDEFINED
,
2270 elfcpp::STV_HIDDEN
, 0,
2274 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2275 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2276 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2278 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2280 = layout
->add_output_section_data(".sdata", 0,
2282 | elfcpp::SHF_WRITE
,
2283 sdata
, ORDER_SMALL_DATA
, false);
2284 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2285 Symbol_table::PREDEFINED
,
2286 os
, 32768, 0, elfcpp::STT_OBJECT
,
2287 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2293 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2294 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2295 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2297 Target_powerpc
<size
, big_endian
>* target
=
2298 static_cast<Target_powerpc
<size
, big_endian
>*>(
2299 parameters
->sized_target
<size
, big_endian
>());
2300 Output_data_got_powerpc
<size
, big_endian
>* got
2301 = target
->got_section(symtab
, layout
);
2302 symtab
->define_in_output_data(".TOC.", NULL
,
2303 Symbol_table::PREDEFINED
,
2307 elfcpp::STV_HIDDEN
, 0,
2313 // Set up PowerPC target specific relobj.
2315 template<int size
, bool big_endian
>
2317 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2318 const std::string
& name
,
2319 Input_file
* input_file
,
2320 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2322 int et
= ehdr
.get_e_type();
2323 // ET_EXEC files are valid input for --just-symbols/-R,
2324 // and we treat them as relocatable objects.
2325 if (et
== elfcpp::ET_REL
2326 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2328 Powerpc_relobj
<size
, big_endian
>* obj
=
2329 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2333 else if (et
== elfcpp::ET_DYN
)
2335 Powerpc_dynobj
<size
, big_endian
>* obj
=
2336 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2342 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2347 template<int size
, bool big_endian
>
2348 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2351 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2352 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2354 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2355 : Output_data_got
<size
, big_endian
>(),
2356 symtab_(symtab
), layout_(layout
),
2357 header_ent_cnt_(size
== 32 ? 3 : 1),
2358 header_index_(size
== 32 ? 0x2000 : 0)
2361 this->set_addralign(256);
2364 // Override all the Output_data_got methods we use so as to first call
2367 add_global(Symbol
* gsym
, unsigned int got_type
)
2369 this->reserve_ent();
2370 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2374 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2376 this->reserve_ent();
2377 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2381 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2382 { return this->add_global_plt(gsym
, got_type
); }
2385 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2386 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2388 this->reserve_ent();
2389 Output_data_got
<size
, big_endian
>::
2390 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2394 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2395 Output_data_reloc_generic
* rel_dyn
,
2396 unsigned int r_type_1
, unsigned int r_type_2
)
2398 this->reserve_ent(2);
2399 Output_data_got
<size
, big_endian
>::
2400 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2404 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2406 this->reserve_ent();
2407 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2412 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2414 this->reserve_ent();
2415 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2420 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2421 { return this->add_local_plt(object
, sym_index
, got_type
); }
2424 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2425 unsigned int got_type
,
2426 Output_data_reloc_generic
* rel_dyn
,
2427 unsigned int r_type
)
2429 this->reserve_ent(2);
2430 Output_data_got
<size
, big_endian
>::
2431 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2435 add_constant(Valtype constant
)
2437 this->reserve_ent();
2438 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2442 add_constant_pair(Valtype c1
, Valtype c2
)
2444 this->reserve_ent(2);
2445 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2448 // Offset of _GLOBAL_OFFSET_TABLE_.
2452 return this->got_offset(this->header_index_
);
2455 // Offset of base used to access the GOT/TOC.
2456 // The got/toc pointer reg will be set to this value.
2458 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2461 return this->g_o_t();
2463 return (this->output_section()->address()
2464 + object
->toc_base_offset()
2468 // Ensure our GOT has a header.
2470 set_final_data_size()
2472 if (this->header_ent_cnt_
!= 0)
2473 this->make_header();
2474 Output_data_got
<size
, big_endian
>::set_final_data_size();
2477 // First word of GOT header needs some values that are not
2478 // handled by Output_data_got so poke them in here.
2479 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2481 do_write(Output_file
* of
)
2484 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2485 val
= this->layout_
->dynamic_section()->address();
2487 val
= this->output_section()->address() + 0x8000;
2488 this->replace_constant(this->header_index_
, val
);
2489 Output_data_got
<size
, big_endian
>::do_write(of
);
2494 reserve_ent(unsigned int cnt
= 1)
2496 if (this->header_ent_cnt_
== 0)
2498 if (this->num_entries() + cnt
> this->header_index_
)
2499 this->make_header();
2505 this->header_ent_cnt_
= 0;
2506 this->header_index_
= this->num_entries();
2509 Output_data_got
<size
, big_endian
>::add_constant(0);
2510 Output_data_got
<size
, big_endian
>::add_constant(0);
2511 Output_data_got
<size
, big_endian
>::add_constant(0);
2513 // Define _GLOBAL_OFFSET_TABLE_ at the header
2514 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2517 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2518 sym
->set_value(this->g_o_t());
2521 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2522 Symbol_table::PREDEFINED
,
2523 this, this->g_o_t(), 0,
2526 elfcpp::STV_HIDDEN
, 0,
2530 Output_data_got
<size
, big_endian
>::add_constant(0);
2533 // Stashed pointers.
2534 Symbol_table
* symtab_
;
2538 unsigned int header_ent_cnt_
;
2539 // GOT header index.
2540 unsigned int header_index_
;
2543 // Get the GOT section, creating it if necessary.
2545 template<int size
, bool big_endian
>
2546 Output_data_got_powerpc
<size
, big_endian
>*
2547 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2550 if (this->got_
== NULL
)
2552 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2555 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2557 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2558 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2559 this->got_
, ORDER_DATA
, false);
2565 // Get the dynamic reloc section, creating it if necessary.
2567 template<int size
, bool big_endian
>
2568 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2569 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2571 if (this->rela_dyn_
== NULL
)
2573 gold_assert(layout
!= NULL
);
2574 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2575 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2576 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2577 ORDER_DYNAMIC_RELOCS
, false);
2579 return this->rela_dyn_
;
2582 // Similarly, but for ifunc symbols get the one for ifunc.
2584 template<int size
, bool big_endian
>
2585 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2586 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2591 return this->rela_dyn_section(layout
);
2593 if (this->iplt_
== NULL
)
2594 this->make_iplt_section(symtab
, layout
);
2595 return this->iplt_
->rel_plt();
2601 // Determine the stub group size. The group size is the absolute
2602 // value of the parameter --stub-group-size. If --stub-group-size
2603 // is passed a negative value, we restrict stubs to be always after
2604 // the stubbed branches.
2605 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2606 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2607 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2608 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2609 owner_(NULL
), output_section_(NULL
)
2613 // Return true iff input section can be handled by current stub
2616 can_add_to_stub_group(Output_section
* o
,
2617 const Output_section::Input_section
* i
,
2620 const Output_section::Input_section
*
2626 { return output_section_
; }
2629 set_output_and_owner(Output_section
* o
,
2630 const Output_section::Input_section
* i
)
2632 this->output_section_
= o
;
2641 // Adding group sections before the stubs.
2642 FINDING_STUB_SECTION
,
2643 // Adding group sections after the stubs.
2647 uint32_t stub_group_size_
;
2648 bool stubs_always_after_branch_
;
2649 bool suppress_size_errors_
;
2650 // True if a stub group can serve multiple output sections.
2653 // Current max size of group. Starts at stub_group_size_ but is
2654 // reduced to stub_group_size_/1024 on seeing a section with
2655 // external conditional branches.
2656 uint32_t group_size_
;
2657 uint64_t group_start_addr_
;
2658 // owner_ and output_section_ specify the section to which stubs are
2659 // attached. The stubs are placed at the end of this section.
2660 const Output_section::Input_section
* owner_
;
2661 Output_section
* output_section_
;
2664 // Return true iff input section can be handled by current stub
2665 // group. Sections are presented to this function in order,
2666 // so the first section is the head of the group.
2669 Stub_control::can_add_to_stub_group(Output_section
* o
,
2670 const Output_section::Input_section
* i
,
2673 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2675 uint64_t start_addr
= o
->address();
2678 // .init and .fini sections are pasted together to form a single
2679 // function. We can't be adding stubs in the middle of the function.
2680 this_size
= o
->data_size();
2683 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2684 this_size
= i
->data_size();
2687 uint64_t end_addr
= start_addr
+ this_size
;
2688 uint32_t group_size
= this->stub_group_size_
;
2690 this->group_size_
= group_size
= group_size
>> 10;
2692 if (this_size
> group_size
&& !this->suppress_size_errors_
)
2693 gold_warning(_("%s:%s exceeds group size"),
2694 i
->relobj()->name().c_str(),
2695 i
->relobj()->section_name(i
->shndx()).c_str());
2697 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
2698 has14
? " 14bit" : "",
2699 i
->relobj()->name().c_str(),
2700 i
->relobj()->section_name(i
->shndx()).c_str(),
2701 (long long) this_size
,
2702 (this->state_
== NO_GROUP
2704 : (long long) end_addr
- this->group_start_addr_
));
2706 if (this->state_
== NO_GROUP
)
2708 // Only here on very first use of Stub_control
2710 this->output_section_
= o
;
2711 this->state_
= FINDING_STUB_SECTION
;
2712 this->group_size_
= group_size
;
2713 this->group_start_addr_
= start_addr
;
2716 else if (!this->multi_os_
&& this->output_section_
!= o
)
2718 else if (this->state_
== HAS_STUB_SECTION
)
2720 // Can we add this section, which is after the stubs, to the
2722 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
2725 else if (this->state_
== FINDING_STUB_SECTION
)
2727 if ((whole_sec
&& this->output_section_
== o
)
2728 || end_addr
- this->group_start_addr_
<= this->group_size_
)
2730 // Stubs are added at the end of "owner_".
2732 this->output_section_
= o
;
2735 // The group before the stubs has reached maximum size.
2736 // Now see about adding sections after the stubs to the
2737 // group. If the current section has a 14-bit branch and
2738 // the group before the stubs exceeds group_size_ (because
2739 // they didn't have 14-bit branches), don't add sections
2740 // after the stubs: The size of stubs for such a large
2741 // group may exceed the reach of a 14-bit branch.
2742 if (!this->stubs_always_after_branch_
2743 && this_size
<= this->group_size_
2744 && start_addr
- this->group_start_addr_
<= this->group_size_
)
2746 gold_debug(DEBUG_TARGET
, "adding after stubs");
2747 this->state_
= HAS_STUB_SECTION
;
2748 this->group_start_addr_
= start_addr
;
2755 gold_debug(DEBUG_TARGET
,
2756 !this->multi_os_
&& this->output_section_
!= o
2757 ? "nope, new output section\n"
2758 : "nope, didn't fit\n");
2760 // The section fails to fit in the current group. Set up a few
2761 // things for the next group. owner_ and output_section_ will be
2762 // set later after we've retrieved those values for the current
2764 this->state_
= FINDING_STUB_SECTION
;
2765 this->group_size_
= group_size
;
2766 this->group_start_addr_
= start_addr
;
2770 // Look over all the input sections, deciding where to place stubs.
2772 template<int size
, bool big_endian
>
2774 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2776 bool no_size_errors
)
2778 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
2779 parameters
->options().stub_group_multi());
2781 // Group input sections and insert stub table
2782 Stub_table_owner
* table_owner
= NULL
;
2783 std::vector
<Stub_table_owner
*> tables
;
2784 Layout::Section_list section_list
;
2785 layout
->get_executable_sections(§ion_list
);
2786 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2787 for (Layout::Section_list::iterator o
= section_list
.begin();
2788 o
!= section_list
.end();
2791 typedef Output_section::Input_section_list Input_section_list
;
2792 for (Input_section_list::const_iterator i
2793 = (*o
)->input_sections().begin();
2794 i
!= (*o
)->input_sections().end();
2797 if (i
->is_input_section()
2798 || i
->is_relaxed_input_section())
2800 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2801 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2802 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2803 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2805 table_owner
->output_section
= stub_control
.output_section();
2806 table_owner
->owner
= stub_control
.owner();
2807 stub_control
.set_output_and_owner(*o
, &*i
);
2810 if (table_owner
== NULL
)
2812 table_owner
= new Stub_table_owner
;
2813 tables
.push_back(table_owner
);
2815 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2819 if (table_owner
!= NULL
)
2821 table_owner
->output_section
= stub_control
.output_section();
2822 table_owner
->owner
= stub_control
.owner();;
2824 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2828 Stub_table
<size
, big_endian
>* stub_table
;
2830 if ((*t
)->owner
->is_input_section())
2831 stub_table
= new Stub_table
<size
, big_endian
>(this,
2832 (*t
)->output_section
,
2834 else if ((*t
)->owner
->is_relaxed_input_section())
2835 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2836 (*t
)->owner
->relaxed_input_section());
2839 this->stub_tables_
.push_back(stub_table
);
2844 static unsigned long
2845 max_branch_delta (unsigned int r_type
)
2847 if (r_type
== elfcpp::R_POWERPC_REL14
2848 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2849 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2851 if (r_type
== elfcpp::R_POWERPC_REL24
2852 || r_type
== elfcpp::R_PPC_PLTREL24
2853 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2858 // If this branch needs a plt call stub, or a long branch stub, make one.
2860 template<int size
, bool big_endian
>
2862 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2863 Stub_table
<size
, big_endian
>* stub_table
,
2864 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2865 Symbol_table
* symtab
) const
2867 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2868 if (sym
!= NULL
&& sym
->is_forwarder())
2869 sym
= symtab
->resolve_forwards(sym
);
2870 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2871 Target_powerpc
<size
, big_endian
>* target
=
2872 static_cast<Target_powerpc
<size
, big_endian
>*>(
2873 parameters
->sized_target
<size
, big_endian
>());
2877 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2878 : this->object_
->local_has_plt_offset(this->r_sym_
))
2882 && target
->abiversion() >= 2
2883 && !parameters
->options().output_is_position_independent()
2884 && !is_branch_reloc(this->r_type_
))
2885 target
->glink_section()->add_global_entry(gsym
);
2888 if (stub_table
== NULL
)
2889 stub_table
= this->object_
->stub_table(this->shndx_
);
2890 if (stub_table
== NULL
)
2892 // This is a ref from a data section to an ifunc symbol.
2893 stub_table
= ifunc_stub_table
;
2895 gold_assert(stub_table
!= NULL
);
2896 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2897 if (from
!= invalid_address
)
2898 from
+= (this->object_
->output_section(this->shndx_
)->address()
2901 ok
= stub_table
->add_plt_call_entry(from
,
2902 this->object_
, gsym
,
2903 this->r_type_
, this->addend_
);
2905 ok
= stub_table
->add_plt_call_entry(from
,
2906 this->object_
, this->r_sym_
,
2907 this->r_type_
, this->addend_
);
2912 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2913 if (max_branch_offset
== 0)
2915 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2916 gold_assert(from
!= invalid_address
);
2917 from
+= (this->object_
->output_section(this->shndx_
)->address()
2922 switch (gsym
->source())
2924 case Symbol::FROM_OBJECT
:
2926 Object
* symobj
= gsym
->object();
2927 if (symobj
->is_dynamic()
2928 || symobj
->pluginobj() != NULL
)
2931 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2932 if (shndx
== elfcpp::SHN_UNDEF
)
2937 case Symbol::IS_UNDEFINED
:
2943 Symbol_table::Compute_final_value_status status
;
2944 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2945 if (status
!= Symbol_table::CFVS_OK
)
2948 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2952 const Symbol_value
<size
>* psymval
2953 = this->object_
->local_symbol(this->r_sym_
);
2954 Symbol_value
<size
> symval
;
2955 if (psymval
->is_section_symbol())
2956 symval
.set_is_section_symbol();
2957 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2958 typename
ObjType::Compute_final_local_value_status status
2959 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2961 if (status
!= ObjType::CFLV_OK
2962 || !symval
.has_output_value())
2964 to
= symval
.value(this->object_
, 0);
2966 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2968 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2969 to
+= this->addend_
;
2970 if (stub_table
== NULL
)
2971 stub_table
= this->object_
->stub_table(this->shndx_
);
2972 if (size
== 64 && target
->abiversion() < 2)
2974 unsigned int dest_shndx
;
2975 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2979 Address delta
= to
- from
;
2980 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2982 if (stub_table
== NULL
)
2984 gold_warning(_("%s:%s: branch in non-executable section,"
2985 " no long branch stub for you"),
2986 this->object_
->name().c_str(),
2987 this->object_
->section_name(this->shndx_
).c_str());
2990 bool save_res
= (size
== 64
2992 && gsym
->source() == Symbol::IN_OUTPUT_DATA
2993 && gsym
->output_data() == target
->savres_section());
2994 ok
= stub_table
->add_long_branch_entry(this->object_
,
2996 from
, to
, save_res
);
3000 gold_debug(DEBUG_TARGET
,
3001 "branch at %s:%s+%#lx\n"
3002 "can't reach stub attached to %s:%s",
3003 this->object_
->name().c_str(),
3004 this->object_
->section_name(this->shndx_
).c_str(),
3005 (unsigned long) this->offset_
,
3006 stub_table
->relobj()->name().c_str(),
3007 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3012 // Relaxation hook. This is where we do stub generation.
3014 template<int size
, bool big_endian
>
3016 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3017 const Input_objects
*,
3018 Symbol_table
* symtab
,
3022 unsigned int prev_brlt_size
= 0;
3026 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3028 && this->abiversion() < 2
3030 && !parameters
->options().user_set_plt_thread_safe())
3032 static const char* const thread_starter
[] =
3036 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3038 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3039 "mq_notify", "create_timer",
3044 "GOMP_parallel_start",
3045 "GOMP_parallel_loop_static",
3046 "GOMP_parallel_loop_static_start",
3047 "GOMP_parallel_loop_dynamic",
3048 "GOMP_parallel_loop_dynamic_start",
3049 "GOMP_parallel_loop_guided",
3050 "GOMP_parallel_loop_guided_start",
3051 "GOMP_parallel_loop_runtime",
3052 "GOMP_parallel_loop_runtime_start",
3053 "GOMP_parallel_sections",
3054 "GOMP_parallel_sections_start",
3059 if (parameters
->options().shared())
3063 for (unsigned int i
= 0;
3064 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3067 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3068 thread_safe
= (sym
!= NULL
3070 && sym
->in_real_elf());
3076 this->plt_thread_safe_
= thread_safe
;
3081 this->stub_group_size_
= parameters
->options().stub_group_size();
3082 bool no_size_errors
= true;
3083 if (this->stub_group_size_
== 1)
3084 this->stub_group_size_
= 0x1c00000;
3085 else if (this->stub_group_size_
== -1)
3086 this->stub_group_size_
= -0x1e00000;
3088 no_size_errors
= false;
3089 this->group_sections(layout
, task
, no_size_errors
);
3091 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3093 this->branch_lookup_table_
.clear();
3094 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3095 p
!= this->stub_tables_
.end();
3098 (*p
)->clear_stubs(true);
3100 this->stub_tables_
.clear();
3101 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3102 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3103 program_name
, this->stub_group_size_
);
3104 this->group_sections(layout
, task
, true);
3107 // We need address of stub tables valid for make_stub.
3108 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3109 p
!= this->stub_tables_
.end();
3112 const Powerpc_relobj
<size
, big_endian
>* object
3113 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3114 Address off
= object
->get_output_section_offset((*p
)->shndx());
3115 gold_assert(off
!= invalid_address
);
3116 Output_section
* os
= (*p
)->output_section();
3117 (*p
)->set_address_and_size(os
, off
);
3122 // Clear plt call stubs, long branch stubs and branch lookup table.
3123 prev_brlt_size
= this->branch_lookup_table_
.size();
3124 this->branch_lookup_table_
.clear();
3125 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3126 p
!= this->stub_tables_
.end();
3129 (*p
)->clear_stubs(false);
3133 // Build all the stubs.
3134 this->relax_failed_
= false;
3135 Stub_table
<size
, big_endian
>* ifunc_stub_table
3136 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3137 Stub_table
<size
, big_endian
>* one_stub_table
3138 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3139 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3140 b
!= this->branch_info_
.end();
3143 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3144 && !this->relax_failed_
)
3146 this->relax_failed_
= true;
3147 this->relax_fail_count_
++;
3148 if (this->relax_fail_count_
< 3)
3153 // Did anything change size?
3154 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3155 bool again
= num_huge_branches
!= prev_brlt_size
;
3156 if (size
== 64 && num_huge_branches
!= 0)
3157 this->make_brlt_section(layout
);
3158 if (size
== 64 && again
)
3159 this->brlt_section_
->set_current_size(num_huge_branches
);
3161 typedef Unordered_set
<Output_section
*> Output_sections
;
3162 Output_sections os_need_update
;
3163 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3164 p
!= this->stub_tables_
.end();
3167 if ((*p
)->size_update())
3170 (*p
)->add_eh_frame(layout
);
3171 os_need_update
.insert((*p
)->output_section());
3175 // Set output section offsets for all input sections in an output
3176 // section that just changed size. Anything past the stubs will
3178 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3179 p
!= os_need_update
.end();
3182 Output_section
* os
= *p
;
3184 typedef Output_section::Input_section_list Input_section_list
;
3185 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3186 i
!= os
->input_sections().end();
3189 off
= align_address(off
, i
->addralign());
3190 if (i
->is_input_section() || i
->is_relaxed_input_section())
3191 i
->relobj()->set_section_offset(i
->shndx(), off
);
3192 if (i
->is_relaxed_input_section())
3194 Stub_table
<size
, big_endian
>* stub_table
3195 = static_cast<Stub_table
<size
, big_endian
>*>(
3196 i
->relaxed_input_section());
3197 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3198 off
+= stub_table_size
;
3199 // After a few iterations, set current stub table size
3200 // as min size threshold, so later stub tables can only
3203 stub_table
->set_min_size_threshold(stub_table_size
);
3206 off
+= i
->data_size();
3208 // If .branch_lt is part of this output section, then we have
3209 // just done the offset adjustment.
3210 os
->clear_section_offsets_need_adjustment();
3215 && num_huge_branches
!= 0
3216 && parameters
->options().output_is_position_independent())
3218 // Fill in the BRLT relocs.
3219 this->brlt_section_
->reset_brlt_sizes();
3220 for (typename
Branch_lookup_table::const_iterator p
3221 = this->branch_lookup_table_
.begin();
3222 p
!= this->branch_lookup_table_
.end();
3225 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3227 this->brlt_section_
->finalize_brlt_sizes();
3232 template<int size
, bool big_endian
>
3234 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3235 unsigned char* oview
,
3239 uint64_t address
= plt
->address();
3240 off_t len
= plt
->data_size();
3242 if (plt
== this->glink_
)
3244 // See Output_data_glink::do_write() for glink contents.
3247 gold_assert(parameters
->doing_static_link());
3248 // Static linking may need stubs, to support ifunc and long
3249 // branches. We need to create an output section for
3250 // .eh_frame early in the link process, to have a place to
3251 // attach stub .eh_frame info. We also need to have
3252 // registered a CIE that matches the stub CIE. Both of
3253 // these requirements are satisfied by creating an FDE and
3254 // CIE for .glink, even though static linking will leave
3255 // .glink zero length.
3256 // ??? Hopefully generating an FDE with a zero address range
3257 // won't confuse anything that consumes .eh_frame info.
3259 else if (size
== 64)
3261 // There is one word before __glink_PLTresolve
3265 else if (parameters
->options().output_is_position_independent())
3267 // There are two FDEs for a position independent glink.
3268 // The first covers the branch table, the second
3269 // __glink_PLTresolve at the end of glink.
3270 off_t resolve_size
= this->glink_
->pltresolve_size
;
3271 if (oview
[9] == elfcpp::DW_CFA_nop
)
3272 len
-= resolve_size
;
3275 address
+= len
- resolve_size
;
3282 // Must be a stub table.
3283 const Stub_table
<size
, big_endian
>* stub_table
3284 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3285 uint64_t stub_address
= stub_table
->stub_address();
3286 len
-= stub_address
- address
;
3287 address
= stub_address
;
3290 *paddress
= address
;
3294 // A class to handle the PLT data.
3296 template<int size
, bool big_endian
>
3297 class Output_data_plt_powerpc
: public Output_section_data_build
3300 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3301 size
, big_endian
> Reloc_section
;
3303 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3304 Reloc_section
* plt_rel
,
3306 : Output_section_data_build(size
== 32 ? 4 : 8),
3312 // Add an entry to the PLT.
3317 add_ifunc_entry(Symbol
*);
3320 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3322 // Return the .rela.plt section data.
3329 // Return the number of PLT entries.
3333 if (this->current_data_size() == 0)
3335 return ((this->current_data_size() - this->first_plt_entry_offset())
3336 / this->plt_entry_size());
3341 do_adjust_output_section(Output_section
* os
)
3346 // Write to a map file.
3348 do_print_to_mapfile(Mapfile
* mapfile
) const
3349 { mapfile
->print_output_data(this, this->name_
); }
3352 // Return the offset of the first non-reserved PLT entry.
3354 first_plt_entry_offset() const
3356 // IPLT has no reserved entry.
3357 if (this->name_
[3] == 'I')
3359 return this->targ_
->first_plt_entry_offset();
3362 // Return the size of each PLT entry.
3364 plt_entry_size() const
3366 return this->targ_
->plt_entry_size();
3369 // Write out the PLT data.
3371 do_write(Output_file
*);
3373 // The reloc section.
3374 Reloc_section
* rel_
;
3375 // Allows access to .glink for do_write.
3376 Target_powerpc
<size
, big_endian
>* targ_
;
3377 // What to report in map file.
3381 // Add an entry to the PLT.
3383 template<int size
, bool big_endian
>
3385 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3387 if (!gsym
->has_plt_offset())
3389 section_size_type off
= this->current_data_size();
3391 off
+= this->first_plt_entry_offset();
3392 gsym
->set_plt_offset(off
);
3393 gsym
->set_needs_dynsym_entry();
3394 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3395 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3396 off
+= this->plt_entry_size();
3397 this->set_current_data_size(off
);
3401 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3403 template<int size
, bool big_endian
>
3405 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3407 if (!gsym
->has_plt_offset())
3409 section_size_type off
= this->current_data_size();
3410 gsym
->set_plt_offset(off
);
3411 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3412 if (size
== 64 && this->targ_
->abiversion() < 2)
3413 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3414 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3415 off
+= this->plt_entry_size();
3416 this->set_current_data_size(off
);
3420 // Add an entry for a local ifunc symbol to the IPLT.
3422 template<int size
, bool big_endian
>
3424 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3425 Sized_relobj_file
<size
, big_endian
>* relobj
,
3426 unsigned int local_sym_index
)
3428 if (!relobj
->local_has_plt_offset(local_sym_index
))
3430 section_size_type off
= this->current_data_size();
3431 relobj
->set_local_plt_offset(local_sym_index
, off
);
3432 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3433 if (size
== 64 && this->targ_
->abiversion() < 2)
3434 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3435 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3437 off
+= this->plt_entry_size();
3438 this->set_current_data_size(off
);
3442 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3443 static const uint32_t add_2_2_11
= 0x7c425a14;
3444 static const uint32_t add_2_2_12
= 0x7c426214;
3445 static const uint32_t add_3_3_2
= 0x7c631214;
3446 static const uint32_t add_3_3_13
= 0x7c636a14;
3447 static const uint32_t add_11_0_11
= 0x7d605a14;
3448 static const uint32_t add_11_2_11
= 0x7d625a14;
3449 static const uint32_t add_11_11_2
= 0x7d6b1214;
3450 static const uint32_t addi_0_12
= 0x380c0000;
3451 static const uint32_t addi_2_2
= 0x38420000;
3452 static const uint32_t addi_3_3
= 0x38630000;
3453 static const uint32_t addi_11_11
= 0x396b0000;
3454 static const uint32_t addi_12_1
= 0x39810000;
3455 static const uint32_t addi_12_12
= 0x398c0000;
3456 static const uint32_t addis_0_2
= 0x3c020000;
3457 static const uint32_t addis_0_13
= 0x3c0d0000;
3458 static const uint32_t addis_2_12
= 0x3c4c0000;
3459 static const uint32_t addis_11_2
= 0x3d620000;
3460 static const uint32_t addis_11_11
= 0x3d6b0000;
3461 static const uint32_t addis_11_30
= 0x3d7e0000;
3462 static const uint32_t addis_12_1
= 0x3d810000;
3463 static const uint32_t addis_12_2
= 0x3d820000;
3464 static const uint32_t addis_12_12
= 0x3d8c0000;
3465 static const uint32_t b
= 0x48000000;
3466 static const uint32_t bcl_20_31
= 0x429f0005;
3467 static const uint32_t bctr
= 0x4e800420;
3468 static const uint32_t blr
= 0x4e800020;
3469 static const uint32_t bnectr_p4
= 0x4ce20420;
3470 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3471 static const uint32_t cmpldi_2_0
= 0x28220000;
3472 static const uint32_t cror_15_15_15
= 0x4def7b82;
3473 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3474 static const uint32_t ld_0_1
= 0xe8010000;
3475 static const uint32_t ld_0_12
= 0xe80c0000;
3476 static const uint32_t ld_2_1
= 0xe8410000;
3477 static const uint32_t ld_2_2
= 0xe8420000;
3478 static const uint32_t ld_2_11
= 0xe84b0000;
3479 static const uint32_t ld_2_12
= 0xe84c0000;
3480 static const uint32_t ld_11_2
= 0xe9620000;
3481 static const uint32_t ld_11_11
= 0xe96b0000;
3482 static const uint32_t ld_12_2
= 0xe9820000;
3483 static const uint32_t ld_12_11
= 0xe98b0000;
3484 static const uint32_t ld_12_12
= 0xe98c0000;
3485 static const uint32_t lfd_0_1
= 0xc8010000;
3486 static const uint32_t li_0_0
= 0x38000000;
3487 static const uint32_t li_12_0
= 0x39800000;
3488 static const uint32_t lis_0
= 0x3c000000;
3489 static const uint32_t lis_2
= 0x3c400000;
3490 static const uint32_t lis_11
= 0x3d600000;
3491 static const uint32_t lis_12
= 0x3d800000;
3492 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3493 static const uint32_t lwz_0_12
= 0x800c0000;
3494 static const uint32_t lwz_11_11
= 0x816b0000;
3495 static const uint32_t lwz_11_30
= 0x817e0000;
3496 static const uint32_t lwz_12_12
= 0x818c0000;
3497 static const uint32_t lwzu_0_12
= 0x840c0000;
3498 static const uint32_t mflr_0
= 0x7c0802a6;
3499 static const uint32_t mflr_11
= 0x7d6802a6;
3500 static const uint32_t mflr_12
= 0x7d8802a6;
3501 static const uint32_t mtctr_0
= 0x7c0903a6;
3502 static const uint32_t mtctr_11
= 0x7d6903a6;
3503 static const uint32_t mtctr_12
= 0x7d8903a6;
3504 static const uint32_t mtlr_0
= 0x7c0803a6;
3505 static const uint32_t mtlr_12
= 0x7d8803a6;
3506 static const uint32_t nop
= 0x60000000;
3507 static const uint32_t ori_0_0_0
= 0x60000000;
3508 static const uint32_t srdi_0_0_2
= 0x7800f082;
3509 static const uint32_t std_0_1
= 0xf8010000;
3510 static const uint32_t std_0_12
= 0xf80c0000;
3511 static const uint32_t std_2_1
= 0xf8410000;
3512 static const uint32_t stfd_0_1
= 0xd8010000;
3513 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3514 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3515 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3516 static const uint32_t xor_2_12_12
= 0x7d826278;
3517 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3519 // Write out the PLT.
3521 template<int size
, bool big_endian
>
3523 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3525 if (size
== 32 && this->name_
[3] != 'I')
3527 const section_size_type offset
= this->offset();
3528 const section_size_type oview_size
3529 = convert_to_section_size_type(this->data_size());
3530 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3531 unsigned char* pov
= oview
;
3532 unsigned char* endpov
= oview
+ oview_size
;
3534 // The address of the .glink branch table
3535 const Output_data_glink
<size
, big_endian
>* glink
3536 = this->targ_
->glink_section();
3537 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3539 while (pov
< endpov
)
3541 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3546 of
->write_output_view(offset
, oview_size
, oview
);
3550 // Create the PLT section.
3552 template<int size
, bool big_endian
>
3554 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3557 if (this->plt_
== NULL
)
3559 if (this->got_
== NULL
)
3560 this->got_section(symtab
, layout
);
3562 if (this->glink_
== NULL
)
3563 make_glink_section(layout
);
3565 // Ensure that .rela.dyn always appears before .rela.plt This is
3566 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3567 // needs to include .rela.plt in its range.
3568 this->rela_dyn_section(layout
);
3570 Reloc_section
* plt_rel
= new Reloc_section(false);
3571 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3572 elfcpp::SHF_ALLOC
, plt_rel
,
3573 ORDER_DYNAMIC_PLT_RELOCS
, false);
3575 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3577 layout
->add_output_section_data(".plt",
3579 ? elfcpp::SHT_PROGBITS
3580 : elfcpp::SHT_NOBITS
),
3581 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3588 Output_section
* rela_plt_os
= plt_rel
->output_section();
3589 rela_plt_os
->set_info_section(this->plt_
->output_section());
3593 // Create the IPLT section.
3595 template<int size
, bool big_endian
>
3597 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3600 if (this->iplt_
== NULL
)
3602 this->make_plt_section(symtab
, layout
);
3604 Reloc_section
* iplt_rel
= new Reloc_section(false);
3605 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3607 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3609 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3613 // A section for huge long branch addresses, similar to plt section.
3615 template<int size
, bool big_endian
>
3616 class Output_data_brlt_powerpc
: public Output_section_data_build
3619 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3620 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3621 size
, big_endian
> Reloc_section
;
3623 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3624 Reloc_section
* brlt_rel
)
3625 : Output_section_data_build(size
== 32 ? 4 : 8),
3633 this->reset_data_size();
3634 this->rel_
->reset_data_size();
3638 finalize_brlt_sizes()
3640 this->finalize_data_size();
3641 this->rel_
->finalize_data_size();
3644 // Add a reloc for an entry in the BRLT.
3646 add_reloc(Address to
, unsigned int off
)
3647 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3649 // Update section and reloc section size.
3651 set_current_size(unsigned int num_branches
)
3653 this->reset_address_and_file_offset();
3654 this->set_current_data_size(num_branches
* 16);
3655 this->finalize_data_size();
3656 Output_section
* os
= this->output_section();
3657 os
->set_section_offsets_need_adjustment();
3658 if (this->rel_
!= NULL
)
3660 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3661 this->rel_
->reset_address_and_file_offset();
3662 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3663 this->rel_
->finalize_data_size();
3664 Output_section
* os
= this->rel_
->output_section();
3665 os
->set_section_offsets_need_adjustment();
3671 do_adjust_output_section(Output_section
* os
)
3676 // Write to a map file.
3678 do_print_to_mapfile(Mapfile
* mapfile
) const
3679 { mapfile
->print_output_data(this, "** BRLT"); }
3682 // Write out the BRLT data.
3684 do_write(Output_file
*);
3686 // The reloc section.
3687 Reloc_section
* rel_
;
3688 Target_powerpc
<size
, big_endian
>* targ_
;
3691 // Make the branch lookup table section.
3693 template<int size
, bool big_endian
>
3695 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3697 if (size
== 64 && this->brlt_section_
== NULL
)
3699 Reloc_section
* brlt_rel
= NULL
;
3700 bool is_pic
= parameters
->options().output_is_position_independent();
3703 // When PIC we can't fill in .branch_lt (like .plt it can be
3704 // a bss style section) but must initialise at runtime via
3705 // dynamic relocats.
3706 this->rela_dyn_section(layout
);
3707 brlt_rel
= new Reloc_section(false);
3708 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3711 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3712 if (this->plt_
&& is_pic
)
3713 this->plt_
->output_section()
3714 ->add_output_section_data(this->brlt_section_
);
3716 layout
->add_output_section_data(".branch_lt",
3717 (is_pic
? elfcpp::SHT_NOBITS
3718 : elfcpp::SHT_PROGBITS
),
3719 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3720 this->brlt_section_
,
3721 (is_pic
? ORDER_SMALL_BSS
3722 : ORDER_SMALL_DATA
),
3727 // Write out .branch_lt when non-PIC.
3729 template<int size
, bool big_endian
>
3731 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3733 if (size
== 64 && !parameters
->options().output_is_position_independent())
3735 const section_size_type offset
= this->offset();
3736 const section_size_type oview_size
3737 = convert_to_section_size_type(this->data_size());
3738 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3740 this->targ_
->write_branch_lookup_table(oview
);
3741 of
->write_output_view(offset
, oview_size
, oview
);
3745 static inline uint32_t
3751 static inline uint32_t
3757 static inline uint32_t
3760 return hi(a
+ 0x8000);
3766 static const unsigned char eh_frame_cie
[12];
3770 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3773 'z', 'R', 0, // Augmentation string.
3774 4, // Code alignment.
3775 0x80 - size
/ 8 , // Data alignment.
3777 1, // Augmentation size.
3778 (elfcpp::DW_EH_PE_pcrel
3779 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3780 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3783 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3784 static const unsigned char glink_eh_frame_fde_64v1
[] =
3786 0, 0, 0, 0, // Replaced with offset to .glink.
3787 0, 0, 0, 0, // Replaced with size of .glink.
3788 0, // Augmentation size.
3789 elfcpp::DW_CFA_advance_loc
+ 1,
3790 elfcpp::DW_CFA_register
, 65, 12,
3791 elfcpp::DW_CFA_advance_loc
+ 4,
3792 elfcpp::DW_CFA_restore_extended
, 65
3795 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3796 static const unsigned char glink_eh_frame_fde_64v2
[] =
3798 0, 0, 0, 0, // Replaced with offset to .glink.
3799 0, 0, 0, 0, // Replaced with size of .glink.
3800 0, // Augmentation size.
3801 elfcpp::DW_CFA_advance_loc
+ 1,
3802 elfcpp::DW_CFA_register
, 65, 0,
3803 elfcpp::DW_CFA_advance_loc
+ 4,
3804 elfcpp::DW_CFA_restore_extended
, 65
3807 // Describe __glink_PLTresolve use of LR, 32-bit version.
3808 static const unsigned char glink_eh_frame_fde_32
[] =
3810 0, 0, 0, 0, // Replaced with offset to .glink.
3811 0, 0, 0, 0, // Replaced with size of .glink.
3812 0, // Augmentation size.
3813 elfcpp::DW_CFA_advance_loc
+ 2,
3814 elfcpp::DW_CFA_register
, 65, 0,
3815 elfcpp::DW_CFA_advance_loc
+ 4,
3816 elfcpp::DW_CFA_restore_extended
, 65
3819 static const unsigned char default_fde
[] =
3821 0, 0, 0, 0, // Replaced with offset to stubs.
3822 0, 0, 0, 0, // Replaced with size of stubs.
3823 0, // Augmentation size.
3824 elfcpp::DW_CFA_nop
, // Pad.
3829 template<bool big_endian
>
3831 write_insn(unsigned char* p
, uint32_t v
)
3833 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3836 // Stub_table holds information about plt and long branch stubs.
3837 // Stubs are built in an area following some input section determined
3838 // by group_sections(). This input section is converted to a relaxed
3839 // input section allowing it to be resized to accommodate the stubs
3841 template<int size
, bool big_endian
>
3842 class Stub_table
: public Output_relaxed_input_section
3845 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3846 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3848 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3849 Output_section
* output_section
,
3850 const Output_section::Input_section
* owner
)
3851 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3853 ->section_addralign(owner
->shndx())),
3854 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3855 orig_data_size_(owner
->current_data_size()),
3856 plt_size_(0), last_plt_size_(0),
3857 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
3858 eh_frame_added_(false), need_save_res_(false)
3860 this->set_output_section(output_section
);
3862 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3863 new_relaxed
.push_back(this);
3864 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3867 // Add a plt call stub.
3869 add_plt_call_entry(Address
,
3870 const Sized_relobj_file
<size
, big_endian
>*,
3876 add_plt_call_entry(Address
,
3877 const Sized_relobj_file
<size
, big_endian
>*,
3882 // Find a given plt call stub.
3884 find_plt_call_entry(const Symbol
*) const;
3887 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3888 unsigned int) const;
3891 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3897 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3902 // Add a long branch stub.
3904 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3905 unsigned int, Address
, Address
, bool);
3908 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3912 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3914 Address max_branch_offset
= max_branch_delta(r_type
);
3915 if (max_branch_offset
== 0)
3917 gold_assert(from
!= invalid_address
);
3918 Address loc
= off
+ this->stub_address();
3919 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3923 clear_stubs(bool all
)
3925 this->plt_call_stubs_
.clear();
3926 this->plt_size_
= 0;
3927 this->long_branch_stubs_
.clear();
3928 this->branch_size_
= 0;
3929 this->need_save_res_
= false;
3932 this->last_plt_size_
= 0;
3933 this->last_branch_size_
= 0;
3938 set_address_and_size(const Output_section
* os
, Address off
)
3940 Address start_off
= off
;
3941 off
+= this->orig_data_size_
;
3942 Address my_size
= this->plt_size_
+ this->branch_size_
;
3943 if (this->need_save_res_
)
3944 my_size
+= this->targ_
->savres_section()->data_size();
3946 off
= align_address(off
, this->stub_align());
3947 // Include original section size and alignment padding in size
3948 my_size
+= off
- start_off
;
3949 // Ensure new size is always larger than min size
3950 // threshold. Alignment requirement is included in "my_size", so
3951 // increase "my_size" does not invalidate alignment.
3952 if (my_size
< this->min_size_threshold_
)
3953 my_size
= this->min_size_threshold_
;
3954 this->reset_address_and_file_offset();
3955 this->set_current_data_size(my_size
);
3956 this->set_address_and_file_offset(os
->address() + start_off
,
3957 os
->offset() + start_off
);
3962 stub_address() const
3964 return align_address(this->address() + this->orig_data_size_
,
3965 this->stub_align());
3971 return align_address(this->offset() + this->orig_data_size_
,
3972 this->stub_align());
3977 { return this->plt_size_
; }
3979 void set_min_size_threshold(Address min_size
)
3980 { this->min_size_threshold_
= min_size
; }
3985 Output_section
* os
= this->output_section();
3986 if (os
->addralign() < this->stub_align())
3988 os
->set_addralign(this->stub_align());
3989 // FIXME: get rid of the insane checkpointing.
3990 // We can't increase alignment of the input section to which
3991 // stubs are attached; The input section may be .init which
3992 // is pasted together with other .init sections to form a
3993 // function. Aligning might insert zero padding resulting in
3994 // sigill. However we do need to increase alignment of the
3995 // output section so that the align_address() on offset in
3996 // set_address_and_size() adds the same padding as the
3997 // align_address() on address in stub_address().
3998 // What's more, we need this alignment for the layout done in
3999 // relaxation_loop_body() so that the output section starts at
4000 // a suitably aligned address.
4001 os
->checkpoint_set_addralign(this->stub_align());
4003 if (this->last_plt_size_
!= this->plt_size_
4004 || this->last_branch_size_
!= this->branch_size_
)
4006 this->last_plt_size_
= this->plt_size_
;
4007 this->last_branch_size_
= this->branch_size_
;
4013 // Add .eh_frame info for this stub section. Unlike other linker
4014 // generated .eh_frame this is added late in the link, because we
4015 // only want the .eh_frame info if this particular stub section is
4018 add_eh_frame(Layout
* layout
)
4020 if (!this->eh_frame_added_
)
4022 if (!parameters
->options().ld_generated_unwind_info())
4025 // Since we add stub .eh_frame info late, it must be placed
4026 // after all other linker generated .eh_frame info so that
4027 // merge mapping need not be updated for input sections.
4028 // There is no provision to use a different CIE to that used
4030 if (!this->targ_
->has_glink())
4033 layout
->add_eh_frame_for_plt(this,
4034 Eh_cie
<size
>::eh_frame_cie
,
4035 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4037 sizeof (default_fde
));
4038 this->eh_frame_added_
= true;
4042 Target_powerpc
<size
, big_endian
>*
4048 class Plt_stub_ent_hash
;
4049 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
4050 Plt_stub_ent_hash
> Plt_stub_entries
;
4052 // Alignment of stub section.
4058 unsigned int min_align
= 32;
4059 unsigned int user_align
= 1 << parameters
->options().plt_align();
4060 return std::max(user_align
, min_align
);
4063 // Return the plt offset for the given call stub.
4065 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4067 const Symbol
* gsym
= p
->first
.sym_
;
4070 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4071 && gsym
->can_use_relative_reloc(false));
4072 return gsym
->plt_offset();
4077 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4078 unsigned int local_sym_index
= p
->first
.locsym_
;
4079 return relobj
->local_plt_offset(local_sym_index
);
4083 // Size of a given plt call stub.
4085 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4091 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4093 plt_addr
+= this->targ_
->iplt_section()->address();
4095 plt_addr
+= this->targ_
->plt_section()->address();
4096 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4097 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4098 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4099 got_addr
+= ppcobj
->toc_base_offset();
4100 Address off
= plt_addr
- got_addr
;
4101 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4102 if (this->targ_
->abiversion() < 2)
4104 bool static_chain
= parameters
->options().plt_static_chain();
4105 bool thread_safe
= this->targ_
->plt_thread_safe();
4109 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4111 unsigned int align
= 1 << parameters
->options().plt_align();
4113 bytes
= (bytes
+ align
- 1) & -align
;
4117 // Return long branch stub size.
4119 branch_stub_size(Address to
)
4122 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
4123 if (to
- loc
+ (1 << 25) < 2 << 25)
4125 if (size
== 64 || !parameters
->options().output_is_position_independent())
4132 do_write(Output_file
*);
4134 // Plt call stub keys.
4138 Plt_stub_ent(const Symbol
* sym
)
4139 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4142 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4143 unsigned int locsym_index
)
4144 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4147 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4149 unsigned int r_type
,
4151 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4154 this->addend_
= addend
;
4155 else if (parameters
->options().output_is_position_independent()
4156 && r_type
== elfcpp::R_PPC_PLTREL24
)
4158 this->addend_
= addend
;
4159 if (this->addend_
>= 32768)
4160 this->object_
= object
;
4164 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
4165 unsigned int locsym_index
,
4166 unsigned int r_type
,
4168 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4171 this->addend_
= addend
;
4172 else if (parameters
->options().output_is_position_independent()
4173 && r_type
== elfcpp::R_PPC_PLTREL24
)
4174 this->addend_
= addend
;
4177 bool operator==(const Plt_stub_ent
& that
) const
4179 return (this->sym_
== that
.sym_
4180 && this->object_
== that
.object_
4181 && this->addend_
== that
.addend_
4182 && this->locsym_
== that
.locsym_
);
4186 const Sized_relobj_file
<size
, big_endian
>* object_
;
4187 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4188 unsigned int locsym_
;
4191 class Plt_stub_ent_hash
4194 size_t operator()(const Plt_stub_ent
& ent
) const
4196 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4197 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4203 // Long branch stub keys.
4204 class Branch_stub_ent
4207 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4208 Address to
, bool save_res
)
4209 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4212 toc_base_off_
= obj
->toc_base_offset();
4215 bool operator==(const Branch_stub_ent
& that
) const
4217 return (this->dest_
== that
.dest_
4219 || this->toc_base_off_
== that
.toc_base_off_
));
4223 unsigned int toc_base_off_
;
4227 class Branch_stub_ent_hash
4230 size_t operator()(const Branch_stub_ent
& ent
) const
4231 { return ent
.dest_
^ ent
.toc_base_off_
; }
4234 // In a sane world this would be a global.
4235 Target_powerpc
<size
, big_endian
>* targ_
;
4236 // Map sym/object/addend to stub offset.
4237 Plt_stub_entries plt_call_stubs_
;
4238 // Map destination address to stub offset.
4239 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4240 Branch_stub_ent_hash
> Branch_stub_entries
;
4241 Branch_stub_entries long_branch_stubs_
;
4242 // size of input section
4243 section_size_type orig_data_size_
;
4245 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4246 // Some rare cases cause (PR/20529) fluctuation in stub table
4247 // size, which leads to an endless relax loop. This is to be fixed
4248 // by, after the first few iterations, allowing only increase of
4249 // stub table size. This variable sets the minimal possible size of
4250 // a stub table, it is zero for the first few iterations, then
4251 // increases monotonically.
4252 Address min_size_threshold_
;
4253 // Whether .eh_frame info has been created for this stub section.
4254 bool eh_frame_added_
;
4255 // Set if this stub group needs a copy of out-of-line register
4256 // save/restore functions.
4257 bool need_save_res_
;
4260 // Add a plt call stub, if we do not already have one for this
4261 // sym/object/addend combo.
4263 template<int size
, bool big_endian
>
4265 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4267 const Sized_relobj_file
<size
, big_endian
>* object
,
4269 unsigned int r_type
,
4272 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4273 unsigned int off
= this->plt_size_
;
4274 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4275 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4277 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4278 return this->can_reach_stub(from
, off
, r_type
);
4281 template<int size
, bool big_endian
>
4283 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4285 const Sized_relobj_file
<size
, big_endian
>* object
,
4286 unsigned int locsym_index
,
4287 unsigned int r_type
,
4290 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4291 unsigned int off
= this->plt_size_
;
4292 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4293 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4295 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4296 return this->can_reach_stub(from
, off
, r_type
);
4299 // Find a plt call stub.
4301 template<int size
, bool big_endian
>
4302 typename Stub_table
<size
, big_endian
>::Address
4303 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4304 const Sized_relobj_file
<size
, big_endian
>* object
,
4306 unsigned int r_type
,
4307 Address addend
) const
4309 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4310 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4311 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4314 template<int size
, bool big_endian
>
4315 typename Stub_table
<size
, big_endian
>::Address
4316 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4318 Plt_stub_ent
ent(gsym
);
4319 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4320 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4323 template<int size
, bool big_endian
>
4324 typename Stub_table
<size
, big_endian
>::Address
4325 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4326 const Sized_relobj_file
<size
, big_endian
>* object
,
4327 unsigned int locsym_index
,
4328 unsigned int r_type
,
4329 Address addend
) const
4331 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4332 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4333 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4336 template<int size
, bool big_endian
>
4337 typename Stub_table
<size
, big_endian
>::Address
4338 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4339 const Sized_relobj_file
<size
, big_endian
>* object
,
4340 unsigned int locsym_index
) const
4342 Plt_stub_ent
ent(object
, locsym_index
);
4343 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4344 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4347 // Add a long branch stub if we don't already have one to given
4350 template<int size
, bool big_endian
>
4352 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4353 const Powerpc_relobj
<size
, big_endian
>* object
,
4354 unsigned int r_type
,
4359 Branch_stub_ent
ent(object
, to
, save_res
);
4360 Address off
= this->branch_size_
;
4361 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4364 this->need_save_res_
= true;
4367 unsigned int stub_size
= this->branch_stub_size(to
);
4368 this->branch_size_
= off
+ stub_size
;
4369 if (size
== 64 && stub_size
!= 4)
4370 this->targ_
->add_branch_lookup_table(to
);
4373 return this->can_reach_stub(from
, off
, r_type
);
4376 // Find long branch stub offset.
4378 template<int size
, bool big_endian
>
4379 typename Stub_table
<size
, big_endian
>::Address
4380 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4381 const Powerpc_relobj
<size
, big_endian
>* object
,
4384 Branch_stub_ent
ent(object
, to
, false);
4385 typename
Branch_stub_entries::const_iterator p
4386 = this->long_branch_stubs_
.find(ent
);
4387 if (p
== this->long_branch_stubs_
.end())
4388 return invalid_address
;
4389 if (p
->first
.save_res_
)
4390 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4394 // A class to handle .glink.
4396 template<int size
, bool big_endian
>
4397 class Output_data_glink
: public Output_section_data
4400 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4401 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4402 static const int pltresolve_size
= 16*4;
4404 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4405 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4406 end_branch_table_(), ge_size_(0)
4410 add_eh_frame(Layout
* layout
);
4413 add_global_entry(const Symbol
*);
4416 find_global_entry(const Symbol
*) const;
4419 global_entry_address() const
4421 gold_assert(this->is_data_size_valid());
4422 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4423 return this->address() + global_entry_off
;
4427 // Write to a map file.
4429 do_print_to_mapfile(Mapfile
* mapfile
) const
4430 { mapfile
->print_output_data(this, _("** glink")); }
4434 set_final_data_size();
4438 do_write(Output_file
*);
4440 // Allows access to .got and .plt for do_write.
4441 Target_powerpc
<size
, big_endian
>* targ_
;
4443 // Map sym to stub offset.
4444 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4445 Global_entry_stub_entries global_entry_stubs_
;
4447 unsigned int end_branch_table_
, ge_size_
;
4450 template<int size
, bool big_endian
>
4452 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4454 if (!parameters
->options().ld_generated_unwind_info())
4459 if (this->targ_
->abiversion() < 2)
4460 layout
->add_eh_frame_for_plt(this,
4461 Eh_cie
<64>::eh_frame_cie
,
4462 sizeof (Eh_cie
<64>::eh_frame_cie
),
4463 glink_eh_frame_fde_64v1
,
4464 sizeof (glink_eh_frame_fde_64v1
));
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_64v2
,
4470 sizeof (glink_eh_frame_fde_64v2
));
4474 // 32-bit .glink can use the default since the CIE return
4475 // address reg, LR, is valid.
4476 layout
->add_eh_frame_for_plt(this,
4477 Eh_cie
<32>::eh_frame_cie
,
4478 sizeof (Eh_cie
<32>::eh_frame_cie
),
4480 sizeof (default_fde
));
4481 // Except where LR is used in a PIC __glink_PLTresolve.
4482 if (parameters
->options().output_is_position_independent())
4483 layout
->add_eh_frame_for_plt(this,
4484 Eh_cie
<32>::eh_frame_cie
,
4485 sizeof (Eh_cie
<32>::eh_frame_cie
),
4486 glink_eh_frame_fde_32
,
4487 sizeof (glink_eh_frame_fde_32
));
4491 template<int size
, bool big_endian
>
4493 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4495 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4496 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4498 this->ge_size_
+= 16;
4501 template<int size
, bool big_endian
>
4502 typename Output_data_glink
<size
, big_endian
>::Address
4503 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4505 typename
Global_entry_stub_entries::const_iterator p
4506 = this->global_entry_stubs_
.find(gsym
);
4507 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4510 template<int size
, bool big_endian
>
4512 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4514 unsigned int count
= this->targ_
->plt_entry_count();
4515 section_size_type total
= 0;
4521 // space for branch table
4522 total
+= 4 * (count
- 1);
4524 total
+= -total
& 15;
4525 total
+= this->pltresolve_size
;
4529 total
+= this->pltresolve_size
;
4531 // space for branch table
4533 if (this->targ_
->abiversion() < 2)
4537 total
+= 4 * (count
- 0x8000);
4541 this->end_branch_table_
= total
;
4542 total
= (total
+ 15) & -16;
4543 total
+= this->ge_size_
;
4545 this->set_data_size(total
);
4548 // Write out plt and long branch stub code.
4550 template<int size
, bool big_endian
>
4552 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4554 if (this->plt_call_stubs_
.empty()
4555 && this->long_branch_stubs_
.empty())
4558 const section_size_type start_off
= this->offset();
4559 const section_size_type off
= this->stub_offset();
4560 const section_size_type oview_size
=
4561 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4562 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4567 const Output_data_got_powerpc
<size
, big_endian
>* got
4568 = this->targ_
->got_section();
4569 Address got_os_addr
= got
->output_section()->address();
4571 if (!this->plt_call_stubs_
.empty())
4573 // The base address of the .plt section.
4574 Address plt_base
= this->targ_
->plt_section()->address();
4575 Address iplt_base
= invalid_address
;
4577 // Write out plt call stubs.
4578 typename
Plt_stub_entries::const_iterator cs
;
4579 for (cs
= this->plt_call_stubs_
.begin();
4580 cs
!= this->plt_call_stubs_
.end();
4584 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4585 Address plt_addr
= pltoff
;
4588 if (iplt_base
== invalid_address
)
4589 iplt_base
= this->targ_
->iplt_section()->address();
4590 plt_addr
+= iplt_base
;
4593 plt_addr
+= plt_base
;
4594 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4595 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4596 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4597 Address off
= plt_addr
- got_addr
;
4599 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4600 gold_error(_("%s: linkage table error against `%s'"),
4601 cs
->first
.object_
->name().c_str(),
4602 cs
->first
.sym_
->demangled_name().c_str());
4604 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4606 = plt_load_toc
&& parameters
->options().plt_static_chain();
4608 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4609 bool use_fake_dep
= false;
4610 Address cmp_branch_off
= 0;
4613 unsigned int pltindex
4614 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4615 / this->targ_
->plt_entry_size());
4617 = (this->targ_
->glink_section()->pltresolve_size
4619 if (pltindex
> 32768)
4620 glinkoff
+= (pltindex
- 32768) * 4;
4622 = this->targ_
->glink_section()->address() + glinkoff
;
4624 = (this->stub_address() + cs
->second
+ 24
4625 + 4 * (ha(off
) != 0)
4626 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4627 + 4 * static_chain
);
4628 cmp_branch_off
= to
- from
;
4629 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4632 p
= oview
+ cs
->second
;
4635 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4639 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4641 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4646 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4648 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4652 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4654 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4658 write_insn
<big_endian
>(p
, mtctr_12
);
4664 write_insn
<big_endian
>(p
, xor_2_12_12
);
4666 write_insn
<big_endian
>(p
, add_11_11_2
);
4669 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4673 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4680 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4682 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4685 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4687 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4691 write_insn
<big_endian
>(p
, mtctr_12
);
4697 write_insn
<big_endian
>(p
, xor_11_12_12
);
4699 write_insn
<big_endian
>(p
, add_2_2_11
);
4704 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4707 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4711 if (thread_safe
&& !use_fake_dep
)
4713 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4715 write_insn
<big_endian
>(p
, bnectr_p4
);
4717 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4720 write_insn
<big_endian
>(p
, bctr
);
4724 // Write out long branch stubs.
4725 typename
Branch_stub_entries::const_iterator bs
;
4726 for (bs
= this->long_branch_stubs_
.begin();
4727 bs
!= this->long_branch_stubs_
.end();
4730 if (bs
->first
.save_res_
)
4732 p
= oview
+ this->plt_size_
+ bs
->second
;
4733 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4734 Address delta
= bs
->first
.dest_
- loc
;
4735 if (delta
+ (1 << 25) < 2 << 25)
4736 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4740 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4741 gold_assert(brlt_addr
!= invalid_address
);
4742 brlt_addr
+= this->targ_
->brlt_section()->address();
4743 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4744 Address brltoff
= brlt_addr
- got_addr
;
4745 if (ha(brltoff
) == 0)
4747 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4751 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4752 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4754 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4755 write_insn
<big_endian
>(p
, bctr
);
4761 if (!this->plt_call_stubs_
.empty())
4763 // The base address of the .plt section.
4764 Address plt_base
= this->targ_
->plt_section()->address();
4765 Address iplt_base
= invalid_address
;
4766 // The address of _GLOBAL_OFFSET_TABLE_.
4767 Address g_o_t
= invalid_address
;
4769 // Write out plt call stubs.
4770 typename
Plt_stub_entries::const_iterator cs
;
4771 for (cs
= this->plt_call_stubs_
.begin();
4772 cs
!= this->plt_call_stubs_
.end();
4776 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4779 if (iplt_base
== invalid_address
)
4780 iplt_base
= this->targ_
->iplt_section()->address();
4781 plt_addr
+= iplt_base
;
4784 plt_addr
+= plt_base
;
4786 p
= oview
+ cs
->second
;
4787 if (parameters
->options().output_is_position_independent())
4790 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4791 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4792 (cs
->first
.object_
));
4793 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4795 unsigned int got2
= ppcobj
->got2_shndx();
4796 got_addr
= ppcobj
->get_output_section_offset(got2
);
4797 gold_assert(got_addr
!= invalid_address
);
4798 got_addr
+= (ppcobj
->output_section(got2
)->address()
4799 + cs
->first
.addend_
);
4803 if (g_o_t
== invalid_address
)
4805 const Output_data_got_powerpc
<size
, big_endian
>* got
4806 = this->targ_
->got_section();
4807 g_o_t
= got
->address() + got
->g_o_t();
4812 Address off
= plt_addr
- got_addr
;
4815 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4816 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4817 write_insn
<big_endian
>(p
+ 8, bctr
);
4821 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4822 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4823 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4824 write_insn
<big_endian
>(p
+ 12, bctr
);
4829 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4830 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4831 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4832 write_insn
<big_endian
>(p
+ 12, bctr
);
4837 // Write out long branch stubs.
4838 typename
Branch_stub_entries::const_iterator bs
;
4839 for (bs
= this->long_branch_stubs_
.begin();
4840 bs
!= this->long_branch_stubs_
.end();
4843 if (bs
->first
.save_res_
)
4845 p
= oview
+ this->plt_size_
+ bs
->second
;
4846 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4847 Address delta
= bs
->first
.dest_
- loc
;
4848 if (delta
+ (1 << 25) < 2 << 25)
4849 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4850 else if (!parameters
->options().output_is_position_independent())
4852 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4853 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4854 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4855 write_insn
<big_endian
>(p
+ 12, bctr
);
4860 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4861 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4862 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4863 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4864 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4865 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4866 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4867 write_insn
<big_endian
>(p
+ 28, bctr
);
4871 if (this->need_save_res_
)
4873 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4874 memcpy (p
, this->targ_
->savres_section()->contents(),
4875 this->targ_
->savres_section()->data_size());
4879 // Write out .glink.
4881 template<int size
, bool big_endian
>
4883 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4885 const section_size_type off
= this->offset();
4886 const section_size_type oview_size
=
4887 convert_to_section_size_type(this->data_size());
4888 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4891 // The base address of the .plt section.
4892 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4893 Address plt_base
= this->targ_
->plt_section()->address();
4897 if (this->end_branch_table_
!= 0)
4899 // Write pltresolve stub.
4901 Address after_bcl
= this->address() + 16;
4902 Address pltoff
= plt_base
- after_bcl
;
4904 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4906 if (this->targ_
->abiversion() < 2)
4908 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4909 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4910 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4911 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4912 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4913 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4914 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4915 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4916 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4917 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4921 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4922 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4923 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4924 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4925 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4926 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4927 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4928 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4929 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4930 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4931 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4932 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4934 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4935 while (p
< oview
+ this->pltresolve_size
)
4936 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4938 // Write lazy link call stubs.
4940 while (p
< oview
+ this->end_branch_table_
)
4942 if (this->targ_
->abiversion() < 2)
4946 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4950 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4951 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4954 uint32_t branch_off
= 8 - (p
- oview
);
4955 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4960 Address plt_base
= this->targ_
->plt_section()->address();
4961 Address iplt_base
= invalid_address
;
4962 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4963 Address global_entry_base
= this->address() + global_entry_off
;
4964 typename
Global_entry_stub_entries::const_iterator ge
;
4965 for (ge
= this->global_entry_stubs_
.begin();
4966 ge
!= this->global_entry_stubs_
.end();
4969 p
= oview
+ global_entry_off
+ ge
->second
;
4970 Address plt_addr
= ge
->first
->plt_offset();
4971 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4972 && ge
->first
->can_use_relative_reloc(false))
4974 if (iplt_base
== invalid_address
)
4975 iplt_base
= this->targ_
->iplt_section()->address();
4976 plt_addr
+= iplt_base
;
4979 plt_addr
+= plt_base
;
4980 Address my_addr
= global_entry_base
+ ge
->second
;
4981 Address off
= plt_addr
- my_addr
;
4983 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4984 gold_error(_("%s: linkage table error against `%s'"),
4985 ge
->first
->object()->name().c_str(),
4986 ge
->first
->demangled_name().c_str());
4988 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4989 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4990 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4991 write_insn
<big_endian
>(p
, bctr
);
4996 const Output_data_got_powerpc
<size
, big_endian
>* got
4997 = this->targ_
->got_section();
4998 // The address of _GLOBAL_OFFSET_TABLE_.
4999 Address g_o_t
= got
->address() + got
->g_o_t();
5001 // Write out pltresolve branch table.
5003 unsigned int the_end
= oview_size
- this->pltresolve_size
;
5004 unsigned char* end_p
= oview
+ the_end
;
5005 while (p
< end_p
- 8 * 4)
5006 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5008 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5010 // Write out pltresolve call stub.
5011 if (parameters
->options().output_is_position_independent())
5013 Address res0_off
= 0;
5014 Address after_bcl_off
= the_end
+ 12;
5015 Address bcl_res0
= after_bcl_off
- res0_off
;
5017 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
5018 write_insn
<big_endian
>(p
+ 4, mflr_0
);
5019 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
5020 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
5021 write_insn
<big_endian
>(p
+ 16, mflr_12
);
5022 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5023 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
5025 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5027 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
5028 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5030 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
5031 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
5035 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
5036 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
5038 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
5039 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
5040 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
5041 write_insn
<big_endian
>(p
+ 52, bctr
);
5042 write_insn
<big_endian
>(p
+ 56, nop
);
5043 write_insn
<big_endian
>(p
+ 60, nop
);
5047 Address res0
= this->address();
5049 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
5050 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
5051 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5052 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
5054 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
5055 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
5056 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
5057 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
5058 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5059 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
5061 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
5062 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
5063 write_insn
<big_endian
>(p
+ 32, bctr
);
5064 write_insn
<big_endian
>(p
+ 36, nop
);
5065 write_insn
<big_endian
>(p
+ 40, nop
);
5066 write_insn
<big_endian
>(p
+ 44, nop
);
5067 write_insn
<big_endian
>(p
+ 48, nop
);
5068 write_insn
<big_endian
>(p
+ 52, nop
);
5069 write_insn
<big_endian
>(p
+ 56, nop
);
5070 write_insn
<big_endian
>(p
+ 60, nop
);
5075 of
->write_output_view(off
, oview_size
, oview
);
5079 // A class to handle linker generated save/restore functions.
5081 template<int size
, bool big_endian
>
5082 class Output_data_save_res
: public Output_section_data_build
5085 Output_data_save_res(Symbol_table
* symtab
);
5087 const unsigned char*
5094 // Write to a map file.
5096 do_print_to_mapfile(Mapfile
* mapfile
) const
5097 { mapfile
->print_output_data(this, _("** save/restore")); }
5100 do_write(Output_file
*);
5103 // The maximum size of save/restore contents.
5104 static const unsigned int savres_max
= 218*4;
5107 savres_define(Symbol_table
* symtab
,
5109 unsigned int lo
, unsigned int hi
,
5110 unsigned char* write_ent(unsigned char*, int),
5111 unsigned char* write_tail(unsigned char*, int));
5113 unsigned char *contents_
;
5116 template<bool big_endian
>
5117 static unsigned char*
5118 savegpr0(unsigned char* p
, int r
)
5120 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5121 write_insn
<big_endian
>(p
, insn
);
5125 template<bool big_endian
>
5126 static unsigned char*
5127 savegpr0_tail(unsigned char* p
, int r
)
5129 p
= savegpr0
<big_endian
>(p
, r
);
5130 uint32_t insn
= std_0_1
+ 16;
5131 write_insn
<big_endian
>(p
, insn
);
5133 write_insn
<big_endian
>(p
, blr
);
5137 template<bool big_endian
>
5138 static unsigned char*
5139 restgpr0(unsigned char* p
, int r
)
5141 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5142 write_insn
<big_endian
>(p
, insn
);
5146 template<bool big_endian
>
5147 static unsigned char*
5148 restgpr0_tail(unsigned char* p
, int r
)
5150 uint32_t insn
= ld_0_1
+ 16;
5151 write_insn
<big_endian
>(p
, insn
);
5153 p
= restgpr0
<big_endian
>(p
, r
);
5154 write_insn
<big_endian
>(p
, mtlr_0
);
5158 p
= restgpr0
<big_endian
>(p
, 30);
5159 p
= restgpr0
<big_endian
>(p
, 31);
5161 write_insn
<big_endian
>(p
, blr
);
5165 template<bool big_endian
>
5166 static unsigned char*
5167 savegpr1(unsigned char* p
, int r
)
5169 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5170 write_insn
<big_endian
>(p
, insn
);
5174 template<bool big_endian
>
5175 static unsigned char*
5176 savegpr1_tail(unsigned char* p
, int r
)
5178 p
= savegpr1
<big_endian
>(p
, r
);
5179 write_insn
<big_endian
>(p
, blr
);
5183 template<bool big_endian
>
5184 static unsigned char*
5185 restgpr1(unsigned char* p
, int r
)
5187 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5188 write_insn
<big_endian
>(p
, insn
);
5192 template<bool big_endian
>
5193 static unsigned char*
5194 restgpr1_tail(unsigned char* p
, int r
)
5196 p
= restgpr1
<big_endian
>(p
, r
);
5197 write_insn
<big_endian
>(p
, blr
);
5201 template<bool big_endian
>
5202 static unsigned char*
5203 savefpr(unsigned char* p
, int r
)
5205 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5206 write_insn
<big_endian
>(p
, insn
);
5210 template<bool big_endian
>
5211 static unsigned char*
5212 savefpr0_tail(unsigned char* p
, int r
)
5214 p
= savefpr
<big_endian
>(p
, r
);
5215 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5217 write_insn
<big_endian
>(p
, blr
);
5221 template<bool big_endian
>
5222 static unsigned char*
5223 restfpr(unsigned char* p
, int r
)
5225 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5226 write_insn
<big_endian
>(p
, insn
);
5230 template<bool big_endian
>
5231 static unsigned char*
5232 restfpr0_tail(unsigned char* p
, int r
)
5234 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5236 p
= restfpr
<big_endian
>(p
, r
);
5237 write_insn
<big_endian
>(p
, mtlr_0
);
5241 p
= restfpr
<big_endian
>(p
, 30);
5242 p
= restfpr
<big_endian
>(p
, 31);
5244 write_insn
<big_endian
>(p
, blr
);
5248 template<bool big_endian
>
5249 static unsigned char*
5250 savefpr1_tail(unsigned char* p
, int r
)
5252 p
= savefpr
<big_endian
>(p
, r
);
5253 write_insn
<big_endian
>(p
, blr
);
5257 template<bool big_endian
>
5258 static unsigned char*
5259 restfpr1_tail(unsigned char* p
, int r
)
5261 p
= restfpr
<big_endian
>(p
, r
);
5262 write_insn
<big_endian
>(p
, blr
);
5266 template<bool big_endian
>
5267 static unsigned char*
5268 savevr(unsigned char* p
, int r
)
5270 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5271 write_insn
<big_endian
>(p
, insn
);
5273 insn
= stvx_0_12_0
+ (r
<< 21);
5274 write_insn
<big_endian
>(p
, insn
);
5278 template<bool big_endian
>
5279 static unsigned char*
5280 savevr_tail(unsigned char* p
, int r
)
5282 p
= savevr
<big_endian
>(p
, r
);
5283 write_insn
<big_endian
>(p
, blr
);
5287 template<bool big_endian
>
5288 static unsigned char*
5289 restvr(unsigned char* p
, int r
)
5291 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5292 write_insn
<big_endian
>(p
, insn
);
5294 insn
= lvx_0_12_0
+ (r
<< 21);
5295 write_insn
<big_endian
>(p
, insn
);
5299 template<bool big_endian
>
5300 static unsigned char*
5301 restvr_tail(unsigned char* p
, int r
)
5303 p
= restvr
<big_endian
>(p
, r
);
5304 write_insn
<big_endian
>(p
, blr
);
5309 template<int size
, bool big_endian
>
5310 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5311 Symbol_table
* symtab
)
5312 : Output_section_data_build(4),
5315 this->savres_define(symtab
,
5316 "_savegpr0_", 14, 31,
5317 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5318 this->savres_define(symtab
,
5319 "_restgpr0_", 14, 29,
5320 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5321 this->savres_define(symtab
,
5322 "_restgpr0_", 30, 31,
5323 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5324 this->savres_define(symtab
,
5325 "_savegpr1_", 14, 31,
5326 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5327 this->savres_define(symtab
,
5328 "_restgpr1_", 14, 31,
5329 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5330 this->savres_define(symtab
,
5331 "_savefpr_", 14, 31,
5332 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5333 this->savres_define(symtab
,
5334 "_restfpr_", 14, 29,
5335 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5336 this->savres_define(symtab
,
5337 "_restfpr_", 30, 31,
5338 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5339 this->savres_define(symtab
,
5341 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5342 this->savres_define(symtab
,
5344 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5345 this->savres_define(symtab
,
5347 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5348 this->savres_define(symtab
,
5350 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5353 template<int size
, bool big_endian
>
5355 Output_data_save_res
<size
, big_endian
>::savres_define(
5356 Symbol_table
* symtab
,
5358 unsigned int lo
, unsigned int hi
,
5359 unsigned char* write_ent(unsigned char*, int),
5360 unsigned char* write_tail(unsigned char*, int))
5362 size_t len
= strlen(name
);
5363 bool writing
= false;
5366 memcpy(sym
, name
, len
);
5369 for (unsigned int i
= lo
; i
<= hi
; i
++)
5371 sym
[len
+ 0] = i
/ 10 + '0';
5372 sym
[len
+ 1] = i
% 10 + '0';
5373 Symbol
* gsym
= symtab
->lookup(sym
);
5374 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5375 writing
= writing
|| refd
;
5378 if (this->contents_
== NULL
)
5379 this->contents_
= new unsigned char[this->savres_max
];
5381 section_size_type value
= this->current_data_size();
5382 unsigned char* p
= this->contents_
+ value
;
5384 p
= write_ent(p
, i
);
5386 p
= write_tail(p
, i
);
5387 section_size_type cur_size
= p
- this->contents_
;
5388 this->set_current_data_size(cur_size
);
5390 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5391 this, value
, cur_size
- value
,
5392 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5393 elfcpp::STV_HIDDEN
, 0, false, false);
5398 // Write out save/restore.
5400 template<int size
, bool big_endian
>
5402 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5404 const section_size_type off
= this->offset();
5405 const section_size_type oview_size
=
5406 convert_to_section_size_type(this->data_size());
5407 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5408 memcpy(oview
, this->contents_
, oview_size
);
5409 of
->write_output_view(off
, oview_size
, oview
);
5413 // Create the glink section.
5415 template<int size
, bool big_endian
>
5417 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5419 if (this->glink_
== NULL
)
5421 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5422 this->glink_
->add_eh_frame(layout
);
5423 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5424 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5425 this->glink_
, ORDER_TEXT
, false);
5429 // Create a PLT entry for a global symbol.
5431 template<int size
, bool big_endian
>
5433 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5437 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5438 && gsym
->can_use_relative_reloc(false))
5440 if (this->iplt_
== NULL
)
5441 this->make_iplt_section(symtab
, layout
);
5442 this->iplt_
->add_ifunc_entry(gsym
);
5446 if (this->plt_
== NULL
)
5447 this->make_plt_section(symtab
, layout
);
5448 this->plt_
->add_entry(gsym
);
5452 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5454 template<int size
, bool big_endian
>
5456 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5457 Symbol_table
* symtab
,
5459 Sized_relobj_file
<size
, big_endian
>* relobj
,
5462 if (this->iplt_
== NULL
)
5463 this->make_iplt_section(symtab
, layout
);
5464 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5467 // Return the number of entries in the PLT.
5469 template<int size
, bool big_endian
>
5471 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5473 if (this->plt_
== NULL
)
5475 return this->plt_
->entry_count();
5478 // Create a GOT entry for local dynamic __tls_get_addr calls.
5480 template<int size
, bool big_endian
>
5482 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5483 Symbol_table
* symtab
,
5485 Sized_relobj_file
<size
, big_endian
>* object
)
5487 if (this->tlsld_got_offset_
== -1U)
5489 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5490 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5491 Output_data_got_powerpc
<size
, big_endian
>* got
5492 = this->got_section(symtab
, layout
);
5493 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5494 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5496 this->tlsld_got_offset_
= got_offset
;
5498 return this->tlsld_got_offset_
;
5501 // Get the Reference_flags for a particular relocation.
5503 template<int size
, bool big_endian
>
5505 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5506 unsigned int r_type
,
5507 const Target_powerpc
* target
)
5513 case elfcpp::R_POWERPC_NONE
:
5514 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5515 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5516 case elfcpp::R_PPC64_TOC
:
5517 // No symbol reference.
5520 case elfcpp::R_PPC64_ADDR64
:
5521 case elfcpp::R_PPC64_UADDR64
:
5522 case elfcpp::R_POWERPC_ADDR32
:
5523 case elfcpp::R_POWERPC_UADDR32
:
5524 case elfcpp::R_POWERPC_ADDR16
:
5525 case elfcpp::R_POWERPC_UADDR16
:
5526 case elfcpp::R_POWERPC_ADDR16_LO
:
5527 case elfcpp::R_POWERPC_ADDR16_HI
:
5528 case elfcpp::R_POWERPC_ADDR16_HA
:
5529 ref
= Symbol::ABSOLUTE_REF
;
5532 case elfcpp::R_POWERPC_ADDR24
:
5533 case elfcpp::R_POWERPC_ADDR14
:
5534 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5535 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5536 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5539 case elfcpp::R_PPC64_REL64
:
5540 case elfcpp::R_POWERPC_REL32
:
5541 case elfcpp::R_PPC_LOCAL24PC
:
5542 case elfcpp::R_POWERPC_REL16
:
5543 case elfcpp::R_POWERPC_REL16_LO
:
5544 case elfcpp::R_POWERPC_REL16_HI
:
5545 case elfcpp::R_POWERPC_REL16_HA
:
5546 ref
= Symbol::RELATIVE_REF
;
5549 case elfcpp::R_POWERPC_REL24
:
5550 case elfcpp::R_PPC_PLTREL24
:
5551 case elfcpp::R_POWERPC_REL14
:
5552 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5553 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5554 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5557 case elfcpp::R_POWERPC_GOT16
:
5558 case elfcpp::R_POWERPC_GOT16_LO
:
5559 case elfcpp::R_POWERPC_GOT16_HI
:
5560 case elfcpp::R_POWERPC_GOT16_HA
:
5561 case elfcpp::R_PPC64_GOT16_DS
:
5562 case elfcpp::R_PPC64_GOT16_LO_DS
:
5563 case elfcpp::R_PPC64_TOC16
:
5564 case elfcpp::R_PPC64_TOC16_LO
:
5565 case elfcpp::R_PPC64_TOC16_HI
:
5566 case elfcpp::R_PPC64_TOC16_HA
:
5567 case elfcpp::R_PPC64_TOC16_DS
:
5568 case elfcpp::R_PPC64_TOC16_LO_DS
:
5569 ref
= Symbol::RELATIVE_REF
;
5572 case elfcpp::R_POWERPC_GOT_TPREL16
:
5573 case elfcpp::R_POWERPC_TLS
:
5574 ref
= Symbol::TLS_REF
;
5577 case elfcpp::R_POWERPC_COPY
:
5578 case elfcpp::R_POWERPC_GLOB_DAT
:
5579 case elfcpp::R_POWERPC_JMP_SLOT
:
5580 case elfcpp::R_POWERPC_RELATIVE
:
5581 case elfcpp::R_POWERPC_DTPMOD
:
5583 // Not expected. We will give an error later.
5587 if (size
== 64 && target
->abiversion() < 2)
5588 ref
|= Symbol::FUNC_DESC_ABI
;
5592 // Report an unsupported relocation against a local symbol.
5594 template<int size
, bool big_endian
>
5596 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5597 Sized_relobj_file
<size
, big_endian
>* object
,
5598 unsigned int r_type
)
5600 gold_error(_("%s: unsupported reloc %u against local symbol"),
5601 object
->name().c_str(), r_type
);
5604 // We are about to emit a dynamic relocation of type R_TYPE. If the
5605 // dynamic linker does not support it, issue an error.
5607 template<int size
, bool big_endian
>
5609 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5610 unsigned int r_type
)
5612 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5614 // These are the relocation types supported by glibc for both 32-bit
5615 // and 64-bit powerpc.
5618 case elfcpp::R_POWERPC_NONE
:
5619 case elfcpp::R_POWERPC_RELATIVE
:
5620 case elfcpp::R_POWERPC_GLOB_DAT
:
5621 case elfcpp::R_POWERPC_DTPMOD
:
5622 case elfcpp::R_POWERPC_DTPREL
:
5623 case elfcpp::R_POWERPC_TPREL
:
5624 case elfcpp::R_POWERPC_JMP_SLOT
:
5625 case elfcpp::R_POWERPC_COPY
:
5626 case elfcpp::R_POWERPC_IRELATIVE
:
5627 case elfcpp::R_POWERPC_ADDR32
:
5628 case elfcpp::R_POWERPC_UADDR32
:
5629 case elfcpp::R_POWERPC_ADDR24
:
5630 case elfcpp::R_POWERPC_ADDR16
:
5631 case elfcpp::R_POWERPC_UADDR16
:
5632 case elfcpp::R_POWERPC_ADDR16_LO
:
5633 case elfcpp::R_POWERPC_ADDR16_HI
:
5634 case elfcpp::R_POWERPC_ADDR16_HA
:
5635 case elfcpp::R_POWERPC_ADDR14
:
5636 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5637 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5638 case elfcpp::R_POWERPC_REL32
:
5639 case elfcpp::R_POWERPC_REL24
:
5640 case elfcpp::R_POWERPC_TPREL16
:
5641 case elfcpp::R_POWERPC_TPREL16_LO
:
5642 case elfcpp::R_POWERPC_TPREL16_HI
:
5643 case elfcpp::R_POWERPC_TPREL16_HA
:
5654 // These are the relocation types supported only on 64-bit.
5655 case elfcpp::R_PPC64_ADDR64
:
5656 case elfcpp::R_PPC64_UADDR64
:
5657 case elfcpp::R_PPC64_JMP_IREL
:
5658 case elfcpp::R_PPC64_ADDR16_DS
:
5659 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5660 case elfcpp::R_PPC64_ADDR16_HIGH
:
5661 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5662 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5663 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5664 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5665 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5666 case elfcpp::R_PPC64_REL64
:
5667 case elfcpp::R_POWERPC_ADDR30
:
5668 case elfcpp::R_PPC64_TPREL16_DS
:
5669 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5670 case elfcpp::R_PPC64_TPREL16_HIGH
:
5671 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5672 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5673 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5674 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5675 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5686 // These are the relocation types supported only on 32-bit.
5687 // ??? glibc ld.so doesn't need to support these.
5688 case elfcpp::R_POWERPC_DTPREL16
:
5689 case elfcpp::R_POWERPC_DTPREL16_LO
:
5690 case elfcpp::R_POWERPC_DTPREL16_HI
:
5691 case elfcpp::R_POWERPC_DTPREL16_HA
:
5699 // This prevents us from issuing more than one error per reloc
5700 // section. But we can still wind up issuing more than one
5701 // error per object file.
5702 if (this->issued_non_pic_error_
)
5704 gold_assert(parameters
->options().output_is_position_independent());
5705 object
->error(_("requires unsupported dynamic reloc; "
5706 "recompile with -fPIC"));
5707 this->issued_non_pic_error_
= true;
5711 // Return whether we need to make a PLT entry for a relocation of the
5712 // given type against a STT_GNU_IFUNC symbol.
5714 template<int size
, bool big_endian
>
5716 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5717 Target_powerpc
<size
, big_endian
>* target
,
5718 Sized_relobj_file
<size
, big_endian
>* object
,
5719 unsigned int r_type
,
5722 // In non-pic code any reference will resolve to the plt call stub
5723 // for the ifunc symbol.
5724 if ((size
== 32 || target
->abiversion() >= 2)
5725 && !parameters
->options().output_is_position_independent())
5730 // Word size refs from data sections are OK, but don't need a PLT entry.
5731 case elfcpp::R_POWERPC_ADDR32
:
5732 case elfcpp::R_POWERPC_UADDR32
:
5737 case elfcpp::R_PPC64_ADDR64
:
5738 case elfcpp::R_PPC64_UADDR64
:
5743 // GOT refs are good, but also don't need a PLT entry.
5744 case elfcpp::R_POWERPC_GOT16
:
5745 case elfcpp::R_POWERPC_GOT16_LO
:
5746 case elfcpp::R_POWERPC_GOT16_HI
:
5747 case elfcpp::R_POWERPC_GOT16_HA
:
5748 case elfcpp::R_PPC64_GOT16_DS
:
5749 case elfcpp::R_PPC64_GOT16_LO_DS
:
5752 // Function calls are good, and these do need a PLT entry.
5753 case elfcpp::R_POWERPC_ADDR24
:
5754 case elfcpp::R_POWERPC_ADDR14
:
5755 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5756 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5757 case elfcpp::R_POWERPC_REL24
:
5758 case elfcpp::R_PPC_PLTREL24
:
5759 case elfcpp::R_POWERPC_REL14
:
5760 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5761 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5768 // Anything else is a problem.
5769 // If we are building a static executable, the libc startup function
5770 // responsible for applying indirect function relocations is going
5771 // to complain about the reloc type.
5772 // If we are building a dynamic executable, we will have a text
5773 // relocation. The dynamic loader will set the text segment
5774 // writable and non-executable to apply text relocations. So we'll
5775 // segfault when trying to run the indirection function to resolve
5778 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5779 object
->name().c_str(), r_type
);
5783 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5787 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
5789 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
5790 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
5791 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5792 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5793 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5794 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5795 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5796 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5797 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5798 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5799 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5800 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5801 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5802 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5803 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5804 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
5805 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
5806 /* Exclude lfqu by testing reloc. If relocs are ever
5807 defined for the reduced D field in psq_lu then those
5808 will need testing too. */
5809 && r_type
!= elfcpp::R_PPC64_TOC16_LO
5810 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
5811 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
5813 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
5814 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
5815 /* Exclude stfqu. psq_stu as above for psq_lu. */
5816 && r_type
!= elfcpp::R_PPC64_TOC16_LO
5817 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
5818 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
5819 && (insn
& 1) == 0));
5822 // Scan a relocation for a local symbol.
5824 template<int size
, bool big_endian
>
5826 Target_powerpc
<size
, big_endian
>::Scan::local(
5827 Symbol_table
* symtab
,
5829 Target_powerpc
<size
, big_endian
>* target
,
5830 Sized_relobj_file
<size
, big_endian
>* object
,
5831 unsigned int data_shndx
,
5832 Output_section
* output_section
,
5833 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5834 unsigned int r_type
,
5835 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5838 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5840 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5841 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5843 this->expect_tls_get_addr_call();
5844 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5845 if (tls_type
!= tls::TLSOPT_NONE
)
5846 this->skip_next_tls_get_addr_call();
5848 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5849 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5851 this->expect_tls_get_addr_call();
5852 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5853 if (tls_type
!= tls::TLSOPT_NONE
)
5854 this->skip_next_tls_get_addr_call();
5857 Powerpc_relobj
<size
, big_endian
>* ppc_object
5858 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5863 && data_shndx
== ppc_object
->opd_shndx()
5864 && r_type
== elfcpp::R_PPC64_ADDR64
)
5865 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5869 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5870 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5871 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5873 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5874 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5875 r_type
, r_sym
, reloc
.get_r_addend());
5876 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5881 case elfcpp::R_POWERPC_NONE
:
5882 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5883 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5884 case elfcpp::R_PPC64_TOCSAVE
:
5885 case elfcpp::R_POWERPC_TLS
:
5886 case elfcpp::R_PPC64_ENTRY
:
5889 case elfcpp::R_PPC64_TOC
:
5891 Output_data_got_powerpc
<size
, big_endian
>* got
5892 = target
->got_section(symtab
, layout
);
5893 if (parameters
->options().output_is_position_independent())
5895 Address off
= reloc
.get_r_offset();
5897 && target
->abiversion() < 2
5898 && data_shndx
== ppc_object
->opd_shndx()
5899 && ppc_object
->get_opd_discard(off
- 8))
5902 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5903 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5904 rela_dyn
->add_output_section_relative(got
->output_section(),
5905 elfcpp::R_POWERPC_RELATIVE
,
5907 object
, data_shndx
, off
,
5908 symobj
->toc_base_offset());
5913 case elfcpp::R_PPC64_ADDR64
:
5914 case elfcpp::R_PPC64_UADDR64
:
5915 case elfcpp::R_POWERPC_ADDR32
:
5916 case elfcpp::R_POWERPC_UADDR32
:
5917 case elfcpp::R_POWERPC_ADDR24
:
5918 case elfcpp::R_POWERPC_ADDR16
:
5919 case elfcpp::R_POWERPC_ADDR16_LO
:
5920 case elfcpp::R_POWERPC_ADDR16_HI
:
5921 case elfcpp::R_POWERPC_ADDR16_HA
:
5922 case elfcpp::R_POWERPC_UADDR16
:
5923 case elfcpp::R_PPC64_ADDR16_HIGH
:
5924 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5925 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5926 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5927 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5928 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5929 case elfcpp::R_PPC64_ADDR16_DS
:
5930 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5931 case elfcpp::R_POWERPC_ADDR14
:
5932 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5933 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5934 // If building a shared library (or a position-independent
5935 // executable), we need to create a dynamic relocation for
5937 if (parameters
->options().output_is_position_independent()
5938 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5940 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5942 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5943 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5944 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5946 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5947 : elfcpp::R_POWERPC_RELATIVE
);
5948 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5949 output_section
, data_shndx
,
5950 reloc
.get_r_offset(),
5951 reloc
.get_r_addend(), false);
5953 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5955 check_non_pic(object
, r_type
);
5956 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5957 data_shndx
, reloc
.get_r_offset(),
5958 reloc
.get_r_addend());
5962 gold_assert(lsym
.get_st_value() == 0);
5963 unsigned int shndx
= lsym
.get_st_shndx();
5965 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5968 object
->error(_("section symbol %u has bad shndx %u"),
5971 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5972 output_section
, data_shndx
,
5973 reloc
.get_r_offset());
5978 case elfcpp::R_POWERPC_REL24
:
5979 case elfcpp::R_PPC_PLTREL24
:
5980 case elfcpp::R_PPC_LOCAL24PC
:
5981 case elfcpp::R_POWERPC_REL14
:
5982 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5983 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5986 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5987 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5988 r_type
, r_sym
, reloc
.get_r_addend());
5992 case elfcpp::R_PPC64_REL64
:
5993 case elfcpp::R_POWERPC_REL32
:
5994 case elfcpp::R_POWERPC_REL16
:
5995 case elfcpp::R_POWERPC_REL16_LO
:
5996 case elfcpp::R_POWERPC_REL16_HI
:
5997 case elfcpp::R_POWERPC_REL16_HA
:
5998 case elfcpp::R_POWERPC_REL16DX_HA
:
5999 case elfcpp::R_POWERPC_SECTOFF
:
6000 case elfcpp::R_POWERPC_SECTOFF_LO
:
6001 case elfcpp::R_POWERPC_SECTOFF_HI
:
6002 case elfcpp::R_POWERPC_SECTOFF_HA
:
6003 case elfcpp::R_PPC64_SECTOFF_DS
:
6004 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6005 case elfcpp::R_POWERPC_TPREL16
:
6006 case elfcpp::R_POWERPC_TPREL16_LO
:
6007 case elfcpp::R_POWERPC_TPREL16_HI
:
6008 case elfcpp::R_POWERPC_TPREL16_HA
:
6009 case elfcpp::R_PPC64_TPREL16_DS
:
6010 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6011 case elfcpp::R_PPC64_TPREL16_HIGH
:
6012 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6013 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6014 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6015 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6016 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6017 case elfcpp::R_POWERPC_DTPREL16
:
6018 case elfcpp::R_POWERPC_DTPREL16_LO
:
6019 case elfcpp::R_POWERPC_DTPREL16_HI
:
6020 case elfcpp::R_POWERPC_DTPREL16_HA
:
6021 case elfcpp::R_PPC64_DTPREL16_DS
:
6022 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6023 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6024 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6025 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6026 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6027 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6028 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6029 case elfcpp::R_PPC64_TLSGD
:
6030 case elfcpp::R_PPC64_TLSLD
:
6031 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6034 case elfcpp::R_POWERPC_GOT16
:
6035 case elfcpp::R_POWERPC_GOT16_LO
:
6036 case elfcpp::R_POWERPC_GOT16_HI
:
6037 case elfcpp::R_POWERPC_GOT16_HA
:
6038 case elfcpp::R_PPC64_GOT16_DS
:
6039 case elfcpp::R_PPC64_GOT16_LO_DS
:
6041 // The symbol requires a GOT entry.
6042 Output_data_got_powerpc
<size
, big_endian
>* got
6043 = target
->got_section(symtab
, layout
);
6044 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6046 if (!parameters
->options().output_is_position_independent())
6049 && (size
== 32 || target
->abiversion() >= 2))
6050 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6052 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6054 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6056 // If we are generating a shared object or a pie, this
6057 // symbol's GOT entry will be set by a dynamic relocation.
6059 off
= got
->add_constant(0);
6060 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6062 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6064 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6065 : elfcpp::R_POWERPC_RELATIVE
);
6066 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6067 got
, off
, 0, false);
6072 case elfcpp::R_PPC64_TOC16
:
6073 case elfcpp::R_PPC64_TOC16_LO
:
6074 case elfcpp::R_PPC64_TOC16_HI
:
6075 case elfcpp::R_PPC64_TOC16_HA
:
6076 case elfcpp::R_PPC64_TOC16_DS
:
6077 case elfcpp::R_PPC64_TOC16_LO_DS
:
6078 // We need a GOT section.
6079 target
->got_section(symtab
, layout
);
6082 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6083 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6084 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6085 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6087 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6088 if (tls_type
== tls::TLSOPT_NONE
)
6090 Output_data_got_powerpc
<size
, big_endian
>* got
6091 = target
->got_section(symtab
, layout
);
6092 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6093 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6094 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6095 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6097 else if (tls_type
== tls::TLSOPT_TO_LE
)
6099 // no GOT relocs needed for Local Exec.
6106 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6107 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6108 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6109 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6111 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6112 if (tls_type
== tls::TLSOPT_NONE
)
6113 target
->tlsld_got_offset(symtab
, layout
, object
);
6114 else if (tls_type
== tls::TLSOPT_TO_LE
)
6116 // no GOT relocs needed for Local Exec.
6117 if (parameters
->options().emit_relocs())
6119 Output_section
* os
= layout
->tls_segment()->first_section();
6120 gold_assert(os
!= NULL
);
6121 os
->set_needs_symtab_index();
6129 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6130 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6131 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6132 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6134 Output_data_got_powerpc
<size
, big_endian
>* got
6135 = target
->got_section(symtab
, layout
);
6136 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6137 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6141 case elfcpp::R_POWERPC_GOT_TPREL16
:
6142 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6143 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6144 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6146 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6147 if (tls_type
== tls::TLSOPT_NONE
)
6149 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6150 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6152 Output_data_got_powerpc
<size
, big_endian
>* got
6153 = target
->got_section(symtab
, layout
);
6154 unsigned int off
= got
->add_constant(0);
6155 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6157 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6158 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6159 elfcpp::R_POWERPC_TPREL
,
6163 else if (tls_type
== tls::TLSOPT_TO_LE
)
6165 // no GOT relocs needed for Local Exec.
6173 unsupported_reloc_local(object
, r_type
);
6178 && parameters
->options().toc_optimize())
6180 if (data_shndx
== ppc_object
->toc_shndx())
6183 if (r_type
!= elfcpp::R_PPC64_ADDR64
6184 || (is_ifunc
&& target
->abiversion() < 2))
6186 else if (parameters
->options().output_is_position_independent())
6192 unsigned int shndx
= lsym
.get_st_shndx();
6193 if (shndx
>= elfcpp::SHN_LORESERVE
6194 && shndx
!= elfcpp::SHN_XINDEX
)
6199 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6202 enum {no_check
, check_lo
, check_ha
} insn_check
;
6206 insn_check
= no_check
;
6209 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6210 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6211 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6212 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6213 case elfcpp::R_POWERPC_GOT16_HA
:
6214 case elfcpp::R_PPC64_TOC16_HA
:
6215 insn_check
= check_ha
;
6218 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6219 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6220 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6221 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6222 case elfcpp::R_POWERPC_GOT16_LO
:
6223 case elfcpp::R_PPC64_GOT16_LO_DS
:
6224 case elfcpp::R_PPC64_TOC16_LO
:
6225 case elfcpp::R_PPC64_TOC16_LO_DS
:
6226 insn_check
= check_lo
;
6230 section_size_type slen
;
6231 const unsigned char* view
= NULL
;
6232 if (insn_check
!= no_check
)
6234 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6235 section_size_type off
=
6236 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6239 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6240 if (insn_check
== check_lo
6241 ? !ok_lo_toc_insn(insn
, r_type
)
6242 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6243 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6245 ppc_object
->set_no_toc_opt();
6246 gold_warning(_("%s: toc optimization is not supported "
6247 "for %#08x instruction"),
6248 ppc_object
->name().c_str(), insn
);
6257 case elfcpp::R_PPC64_TOC16
:
6258 case elfcpp::R_PPC64_TOC16_LO
:
6259 case elfcpp::R_PPC64_TOC16_HI
:
6260 case elfcpp::R_PPC64_TOC16_HA
:
6261 case elfcpp::R_PPC64_TOC16_DS
:
6262 case elfcpp::R_PPC64_TOC16_LO_DS
:
6263 unsigned int shndx
= lsym
.get_st_shndx();
6264 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6266 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6267 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6269 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_offset();
6270 if (dst_off
< ppc_object
->section_size(shndx
))
6273 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6275 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6277 // Need to check that the insn is a ld
6279 view
= ppc_object
->section_contents(data_shndx
,
6282 section_size_type off
=
6283 (convert_to_section_size_type(reloc
.get_r_offset())
6284 + (big_endian
? -2 : 3));
6286 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6290 ppc_object
->set_no_toc_opt(dst_off
);
6301 case elfcpp::R_POWERPC_REL32
:
6302 if (ppc_object
->got2_shndx() != 0
6303 && parameters
->options().output_is_position_independent())
6305 unsigned int shndx
= lsym
.get_st_shndx();
6306 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6308 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6309 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
6310 && (ppc_object
->section_flags(data_shndx
)
6311 & elfcpp::SHF_EXECINSTR
) != 0)
6312 gold_error(_("%s: unsupported -mbss-plt code"),
6313 ppc_object
->name().c_str());
6323 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6324 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6325 case elfcpp::R_POWERPC_GOT_TPREL16
:
6326 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6327 case elfcpp::R_POWERPC_GOT16
:
6328 case elfcpp::R_PPC64_GOT16_DS
:
6329 case elfcpp::R_PPC64_TOC16
:
6330 case elfcpp::R_PPC64_TOC16_DS
:
6331 ppc_object
->set_has_small_toc_reloc();
6337 // Report an unsupported relocation against a global symbol.
6339 template<int size
, bool big_endian
>
6341 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
6342 Sized_relobj_file
<size
, big_endian
>* object
,
6343 unsigned int r_type
,
6346 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
6347 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
6350 // Scan a relocation for a global symbol.
6352 template<int size
, bool big_endian
>
6354 Target_powerpc
<size
, big_endian
>::Scan::global(
6355 Symbol_table
* symtab
,
6357 Target_powerpc
<size
, big_endian
>* target
,
6358 Sized_relobj_file
<size
, big_endian
>* object
,
6359 unsigned int data_shndx
,
6360 Output_section
* output_section
,
6361 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6362 unsigned int r_type
,
6365 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
6368 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6369 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6371 this->expect_tls_get_addr_call();
6372 const bool final
= gsym
->final_value_is_known();
6373 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6374 if (tls_type
!= tls::TLSOPT_NONE
)
6375 this->skip_next_tls_get_addr_call();
6377 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6378 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6380 this->expect_tls_get_addr_call();
6381 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6382 if (tls_type
!= tls::TLSOPT_NONE
)
6383 this->skip_next_tls_get_addr_call();
6386 Powerpc_relobj
<size
, big_endian
>* ppc_object
6387 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6389 // A STT_GNU_IFUNC symbol may require a PLT entry.
6390 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
6391 bool pushed_ifunc
= false;
6392 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6394 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6395 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6396 r_type
, r_sym
, reloc
.get_r_addend());
6397 target
->make_plt_entry(symtab
, layout
, gsym
);
6398 pushed_ifunc
= true;
6403 case elfcpp::R_POWERPC_NONE
:
6404 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6405 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6406 case elfcpp::R_PPC_LOCAL24PC
:
6407 case elfcpp::R_POWERPC_TLS
:
6408 case elfcpp::R_PPC64_ENTRY
:
6411 case elfcpp::R_PPC64_TOC
:
6413 Output_data_got_powerpc
<size
, big_endian
>* got
6414 = target
->got_section(symtab
, layout
);
6415 if (parameters
->options().output_is_position_independent())
6417 Address off
= reloc
.get_r_offset();
6419 && data_shndx
== ppc_object
->opd_shndx()
6420 && ppc_object
->get_opd_discard(off
- 8))
6423 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6424 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6425 if (data_shndx
!= ppc_object
->opd_shndx())
6426 symobj
= static_cast
6427 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6428 rela_dyn
->add_output_section_relative(got
->output_section(),
6429 elfcpp::R_POWERPC_RELATIVE
,
6431 object
, data_shndx
, off
,
6432 symobj
->toc_base_offset());
6437 case elfcpp::R_PPC64_ADDR64
:
6439 && target
->abiversion() < 2
6440 && data_shndx
== ppc_object
->opd_shndx()
6441 && (gsym
->is_defined_in_discarded_section()
6442 || gsym
->object() != object
))
6444 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6448 case elfcpp::R_PPC64_UADDR64
:
6449 case elfcpp::R_POWERPC_ADDR32
:
6450 case elfcpp::R_POWERPC_UADDR32
:
6451 case elfcpp::R_POWERPC_ADDR24
:
6452 case elfcpp::R_POWERPC_ADDR16
:
6453 case elfcpp::R_POWERPC_ADDR16_LO
:
6454 case elfcpp::R_POWERPC_ADDR16_HI
:
6455 case elfcpp::R_POWERPC_ADDR16_HA
:
6456 case elfcpp::R_POWERPC_UADDR16
:
6457 case elfcpp::R_PPC64_ADDR16_HIGH
:
6458 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6459 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6460 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6461 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6462 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6463 case elfcpp::R_PPC64_ADDR16_DS
:
6464 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6465 case elfcpp::R_POWERPC_ADDR14
:
6466 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6467 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6469 // Make a PLT entry if necessary.
6470 if (gsym
->needs_plt_entry())
6472 // Since this is not a PC-relative relocation, we may be
6473 // taking the address of a function. In that case we need to
6474 // set the entry in the dynamic symbol table to the address of
6475 // the PLT call stub.
6476 bool need_ifunc_plt
= false;
6477 if ((size
== 32 || target
->abiversion() >= 2)
6478 && gsym
->is_from_dynobj()
6479 && !parameters
->options().output_is_position_independent())
6481 gsym
->set_needs_dynsym_value();
6482 need_ifunc_plt
= true;
6484 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6486 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6487 target
->push_branch(ppc_object
, data_shndx
,
6488 reloc
.get_r_offset(), r_type
, r_sym
,
6489 reloc
.get_r_addend());
6490 target
->make_plt_entry(symtab
, layout
, gsym
);
6493 // Make a dynamic relocation if necessary.
6494 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6495 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6497 if (!parameters
->options().output_is_position_independent()
6498 && gsym
->may_need_copy_reloc())
6500 target
->copy_reloc(symtab
, layout
, object
,
6501 data_shndx
, output_section
, gsym
, reloc
);
6503 else if ((((size
== 32
6504 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6506 && r_type
== elfcpp::R_PPC64_ADDR64
6507 && target
->abiversion() >= 2))
6508 && gsym
->can_use_relative_reloc(false)
6509 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6510 && parameters
->options().shared()))
6512 && r_type
== elfcpp::R_PPC64_ADDR64
6513 && target
->abiversion() < 2
6514 && (gsym
->can_use_relative_reloc(false)
6515 || data_shndx
== ppc_object
->opd_shndx())))
6517 Reloc_section
* rela_dyn
6518 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6519 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6520 : elfcpp::R_POWERPC_RELATIVE
);
6521 rela_dyn
->add_symbolless_global_addend(
6522 gsym
, dynrel
, output_section
, object
, data_shndx
,
6523 reloc
.get_r_offset(), reloc
.get_r_addend());
6527 Reloc_section
* rela_dyn
6528 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6529 check_non_pic(object
, r_type
);
6530 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6532 reloc
.get_r_offset(),
6533 reloc
.get_r_addend());
6536 && parameters
->options().toc_optimize()
6537 && data_shndx
== ppc_object
->toc_shndx())
6538 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6544 case elfcpp::R_PPC_PLTREL24
:
6545 case elfcpp::R_POWERPC_REL24
:
6548 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6549 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6550 r_type
, r_sym
, reloc
.get_r_addend());
6551 if (gsym
->needs_plt_entry()
6552 || (!gsym
->final_value_is_known()
6553 && (gsym
->is_undefined()
6554 || gsym
->is_from_dynobj()
6555 || gsym
->is_preemptible())))
6556 target
->make_plt_entry(symtab
, layout
, gsym
);
6560 case elfcpp::R_PPC64_REL64
:
6561 case elfcpp::R_POWERPC_REL32
:
6562 // Make a dynamic relocation if necessary.
6563 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6565 if (!parameters
->options().output_is_position_independent()
6566 && gsym
->may_need_copy_reloc())
6568 target
->copy_reloc(symtab
, layout
, object
,
6569 data_shndx
, output_section
, gsym
,
6574 Reloc_section
* rela_dyn
6575 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6576 check_non_pic(object
, r_type
);
6577 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6578 data_shndx
, reloc
.get_r_offset(),
6579 reloc
.get_r_addend());
6584 case elfcpp::R_POWERPC_REL14
:
6585 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6586 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6589 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6590 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6591 r_type
, r_sym
, reloc
.get_r_addend());
6595 case elfcpp::R_POWERPC_REL16
:
6596 case elfcpp::R_POWERPC_REL16_LO
:
6597 case elfcpp::R_POWERPC_REL16_HI
:
6598 case elfcpp::R_POWERPC_REL16_HA
:
6599 case elfcpp::R_POWERPC_REL16DX_HA
:
6600 case elfcpp::R_POWERPC_SECTOFF
:
6601 case elfcpp::R_POWERPC_SECTOFF_LO
:
6602 case elfcpp::R_POWERPC_SECTOFF_HI
:
6603 case elfcpp::R_POWERPC_SECTOFF_HA
:
6604 case elfcpp::R_PPC64_SECTOFF_DS
:
6605 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6606 case elfcpp::R_POWERPC_TPREL16
:
6607 case elfcpp::R_POWERPC_TPREL16_LO
:
6608 case elfcpp::R_POWERPC_TPREL16_HI
:
6609 case elfcpp::R_POWERPC_TPREL16_HA
:
6610 case elfcpp::R_PPC64_TPREL16_DS
:
6611 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6612 case elfcpp::R_PPC64_TPREL16_HIGH
:
6613 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6614 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6615 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6616 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6617 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6618 case elfcpp::R_POWERPC_DTPREL16
:
6619 case elfcpp::R_POWERPC_DTPREL16_LO
:
6620 case elfcpp::R_POWERPC_DTPREL16_HI
:
6621 case elfcpp::R_POWERPC_DTPREL16_HA
:
6622 case elfcpp::R_PPC64_DTPREL16_DS
:
6623 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6624 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6625 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6626 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6627 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6628 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6629 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6630 case elfcpp::R_PPC64_TLSGD
:
6631 case elfcpp::R_PPC64_TLSLD
:
6632 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6635 case elfcpp::R_POWERPC_GOT16
:
6636 case elfcpp::R_POWERPC_GOT16_LO
:
6637 case elfcpp::R_POWERPC_GOT16_HI
:
6638 case elfcpp::R_POWERPC_GOT16_HA
:
6639 case elfcpp::R_PPC64_GOT16_DS
:
6640 case elfcpp::R_PPC64_GOT16_LO_DS
:
6642 // The symbol requires a GOT entry.
6643 Output_data_got_powerpc
<size
, big_endian
>* got
;
6645 got
= target
->got_section(symtab
, layout
);
6646 if (gsym
->final_value_is_known())
6649 && (size
== 32 || target
->abiversion() >= 2))
6650 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6652 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6654 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6656 // If we are generating a shared object or a pie, this
6657 // symbol's GOT entry will be set by a dynamic relocation.
6658 unsigned int off
= got
->add_constant(0);
6659 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6661 Reloc_section
* rela_dyn
6662 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6664 if (gsym
->can_use_relative_reloc(false)
6666 || target
->abiversion() >= 2)
6667 && gsym
->visibility() == elfcpp::STV_PROTECTED
6668 && parameters
->options().shared()))
6670 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6671 : elfcpp::R_POWERPC_RELATIVE
);
6672 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6676 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6677 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6683 case elfcpp::R_PPC64_TOC16
:
6684 case elfcpp::R_PPC64_TOC16_LO
:
6685 case elfcpp::R_PPC64_TOC16_HI
:
6686 case elfcpp::R_PPC64_TOC16_HA
:
6687 case elfcpp::R_PPC64_TOC16_DS
:
6688 case elfcpp::R_PPC64_TOC16_LO_DS
:
6689 // We need a GOT section.
6690 target
->got_section(symtab
, layout
);
6693 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6694 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6695 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6696 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6698 const bool final
= gsym
->final_value_is_known();
6699 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6700 if (tls_type
== tls::TLSOPT_NONE
)
6702 Output_data_got_powerpc
<size
, big_endian
>* got
6703 = target
->got_section(symtab
, layout
);
6704 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6705 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6706 elfcpp::R_POWERPC_DTPMOD
,
6707 elfcpp::R_POWERPC_DTPREL
);
6709 else if (tls_type
== tls::TLSOPT_TO_IE
)
6711 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6713 Output_data_got_powerpc
<size
, big_endian
>* got
6714 = target
->got_section(symtab
, layout
);
6715 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6716 if (gsym
->is_undefined()
6717 || gsym
->is_from_dynobj())
6719 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6720 elfcpp::R_POWERPC_TPREL
);
6724 unsigned int off
= got
->add_constant(0);
6725 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6726 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6727 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6732 else if (tls_type
== tls::TLSOPT_TO_LE
)
6734 // no GOT relocs needed for Local Exec.
6741 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6742 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6743 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6744 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6746 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6747 if (tls_type
== tls::TLSOPT_NONE
)
6748 target
->tlsld_got_offset(symtab
, layout
, object
);
6749 else if (tls_type
== tls::TLSOPT_TO_LE
)
6751 // no GOT relocs needed for Local Exec.
6752 if (parameters
->options().emit_relocs())
6754 Output_section
* os
= layout
->tls_segment()->first_section();
6755 gold_assert(os
!= NULL
);
6756 os
->set_needs_symtab_index();
6764 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6765 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6766 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6767 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6769 Output_data_got_powerpc
<size
, big_endian
>* got
6770 = target
->got_section(symtab
, layout
);
6771 if (!gsym
->final_value_is_known()
6772 && (gsym
->is_from_dynobj()
6773 || gsym
->is_undefined()
6774 || gsym
->is_preemptible()))
6775 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6776 target
->rela_dyn_section(layout
),
6777 elfcpp::R_POWERPC_DTPREL
);
6779 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6783 case elfcpp::R_POWERPC_GOT_TPREL16
:
6784 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6785 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6786 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6788 const bool final
= gsym
->final_value_is_known();
6789 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6790 if (tls_type
== tls::TLSOPT_NONE
)
6792 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6794 Output_data_got_powerpc
<size
, big_endian
>* got
6795 = target
->got_section(symtab
, layout
);
6796 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6797 if (gsym
->is_undefined()
6798 || gsym
->is_from_dynobj())
6800 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6801 elfcpp::R_POWERPC_TPREL
);
6805 unsigned int off
= got
->add_constant(0);
6806 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6807 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6808 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6813 else if (tls_type
== tls::TLSOPT_TO_LE
)
6815 // no GOT relocs needed for Local Exec.
6823 unsupported_reloc_global(object
, r_type
, gsym
);
6828 && parameters
->options().toc_optimize())
6830 if (data_shndx
== ppc_object
->toc_shndx())
6833 if (r_type
!= elfcpp::R_PPC64_ADDR64
6834 || (is_ifunc
&& target
->abiversion() < 2))
6836 else if (parameters
->options().output_is_position_independent()
6837 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
6840 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6843 enum {no_check
, check_lo
, check_ha
} insn_check
;
6847 insn_check
= no_check
;
6850 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6851 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6852 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6853 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6854 case elfcpp::R_POWERPC_GOT16_HA
:
6855 case elfcpp::R_PPC64_TOC16_HA
:
6856 insn_check
= check_ha
;
6859 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6860 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6861 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6862 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6863 case elfcpp::R_POWERPC_GOT16_LO
:
6864 case elfcpp::R_PPC64_GOT16_LO_DS
:
6865 case elfcpp::R_PPC64_TOC16_LO
:
6866 case elfcpp::R_PPC64_TOC16_LO_DS
:
6867 insn_check
= check_lo
;
6871 section_size_type slen
;
6872 const unsigned char* view
= NULL
;
6873 if (insn_check
!= no_check
)
6875 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6876 section_size_type off
=
6877 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6880 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6881 if (insn_check
== check_lo
6882 ? !ok_lo_toc_insn(insn
, r_type
)
6883 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6884 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6886 ppc_object
->set_no_toc_opt();
6887 gold_warning(_("%s: toc optimization is not supported "
6888 "for %#08x instruction"),
6889 ppc_object
->name().c_str(), insn
);
6898 case elfcpp::R_PPC64_TOC16
:
6899 case elfcpp::R_PPC64_TOC16_LO
:
6900 case elfcpp::R_PPC64_TOC16_HI
:
6901 case elfcpp::R_PPC64_TOC16_HA
:
6902 case elfcpp::R_PPC64_TOC16_DS
:
6903 case elfcpp::R_PPC64_TOC16_LO_DS
:
6904 if (gsym
->source() == Symbol::FROM_OBJECT
6905 && !gsym
->object()->is_dynamic())
6907 Powerpc_relobj
<size
, big_endian
>* sym_object
6908 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6910 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
6911 if (shndx
== sym_object
->toc_shndx())
6913 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
6914 Address dst_off
= sym
->value() + reloc
.get_r_offset();
6915 if (dst_off
< sym_object
->section_size(shndx
))
6918 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6920 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6922 // Need to check that the insn is a ld
6924 view
= ppc_object
->section_contents(data_shndx
,
6927 section_size_type off
=
6928 (convert_to_section_size_type(reloc
.get_r_offset())
6929 + (big_endian
? -2 : 3));
6931 && (view
[off
] & (0x3f << 2)) == (58u << 2))
6935 sym_object
->set_no_toc_opt(dst_off
);
6947 case elfcpp::R_PPC_LOCAL24PC
:
6948 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
6949 gold_error(_("%s: unsupported -mbss-plt code"),
6950 ppc_object
->name().c_str());
6959 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6960 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6961 case elfcpp::R_POWERPC_GOT_TPREL16
:
6962 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6963 case elfcpp::R_POWERPC_GOT16
:
6964 case elfcpp::R_PPC64_GOT16_DS
:
6965 case elfcpp::R_PPC64_TOC16
:
6966 case elfcpp::R_PPC64_TOC16_DS
:
6967 ppc_object
->set_has_small_toc_reloc();
6973 // Process relocations for gc.
6975 template<int size
, bool big_endian
>
6977 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6978 Symbol_table
* symtab
,
6980 Sized_relobj_file
<size
, big_endian
>* object
,
6981 unsigned int data_shndx
,
6983 const unsigned char* prelocs
,
6985 Output_section
* output_section
,
6986 bool needs_special_offset_handling
,
6987 size_t local_symbol_count
,
6988 const unsigned char* plocal_symbols
)
6990 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6991 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
6994 Powerpc_relobj
<size
, big_endian
>* ppc_object
6995 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6997 ppc_object
->set_opd_valid();
6998 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7000 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7001 for (p
= ppc_object
->access_from_map()->begin();
7002 p
!= ppc_object
->access_from_map()->end();
7005 Address dst_off
= p
->first
;
7006 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7007 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7008 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7010 Relobj
* src_obj
= s
->first
;
7011 unsigned int src_indx
= s
->second
;
7012 symtab
->gc()->add_reference(src_obj
, src_indx
,
7013 ppc_object
, dst_indx
);
7017 ppc_object
->access_from_map()->clear();
7018 ppc_object
->process_gc_mark(symtab
);
7019 // Don't look at .opd relocs as .opd will reference everything.
7023 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7032 needs_special_offset_handling
,
7037 // Handle target specific gc actions when adding a gc reference from
7038 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7039 // and DST_OFF. For powerpc64, this adds a referenc to the code
7040 // section of a function descriptor.
7042 template<int size
, bool big_endian
>
7044 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7045 Symbol_table
* symtab
,
7047 unsigned int src_shndx
,
7049 unsigned int dst_shndx
,
7050 Address dst_off
) const
7052 if (size
!= 64 || dst_obj
->is_dynamic())
7055 Powerpc_relobj
<size
, big_endian
>* ppc_object
7056 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7057 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7059 if (ppc_object
->opd_valid())
7061 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7062 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7066 // If we haven't run scan_opd_relocs, we must delay
7067 // processing this function descriptor reference.
7068 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7073 // Add any special sections for this symbol to the gc work list.
7074 // For powerpc64, this adds the code section of a function
7077 template<int size
, bool big_endian
>
7079 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7080 Symbol_table
* symtab
,
7085 Powerpc_relobj
<size
, big_endian
>* ppc_object
7086 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7088 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7089 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7091 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7092 Address dst_off
= gsym
->value();
7093 if (ppc_object
->opd_valid())
7095 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7096 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7100 ppc_object
->add_gc_mark(dst_off
);
7105 // For a symbol location in .opd, set LOC to the location of the
7108 template<int size
, bool big_endian
>
7110 Target_powerpc
<size
, big_endian
>::do_function_location(
7111 Symbol_location
* loc
) const
7113 if (size
== 64 && loc
->shndx
!= 0)
7115 if (loc
->object
->is_dynamic())
7117 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7118 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7119 if (loc
->shndx
== ppc_object
->opd_shndx())
7122 Address off
= loc
->offset
- ppc_object
->opd_address();
7123 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7124 loc
->offset
= dest_off
;
7129 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7130 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7131 if (loc
->shndx
== ppc_object
->opd_shndx())
7134 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7135 loc
->offset
= dest_off
;
7141 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7142 // compiled with -fsplit-stack. The function calls non-split-stack
7143 // code. Change the function to ensure it has enough stack space to
7144 // call some random function.
7146 template<int size
, bool big_endian
>
7148 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7151 section_offset_type fnoffset
,
7152 section_size_type fnsize
,
7153 const unsigned char* prelocs
,
7155 unsigned char* view
,
7156 section_size_type view_size
,
7158 std::string
* to
) const
7160 // 32-bit not supported.
7164 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7165 prelocs
, reloc_count
, view
, view_size
,
7170 // The function always starts with
7171 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7172 // addis %r12,%r1,-allocate@ha
7173 // addi %r12,%r12,-allocate@l
7175 // but note that the addis or addi may be replaced with a nop
7177 unsigned char *entry
= view
+ fnoffset
;
7178 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7180 if ((insn
& 0xffff0000) == addis_2_12
)
7182 /* Skip ELFv2 global entry code. */
7184 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7187 unsigned char *pinsn
= entry
;
7189 const uint32_t ld_private_ss
= 0xe80d8fc0;
7190 if (insn
== ld_private_ss
)
7192 int32_t allocate
= 0;
7196 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7197 if ((insn
& 0xffff0000) == addis_12_1
)
7198 allocate
+= (insn
& 0xffff) << 16;
7199 else if ((insn
& 0xffff0000) == addi_12_1
7200 || (insn
& 0xffff0000) == addi_12_12
)
7201 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7202 else if (insn
!= nop
)
7205 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7207 int extra
= parameters
->options().split_stack_adjust_size();
7209 if (allocate
>= 0 || extra
< 0)
7211 object
->error(_("split-stack stack size overflow at "
7212 "section %u offset %0zx"),
7213 shndx
, static_cast<size_t>(fnoffset
));
7217 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7218 if (insn
!= addis_12_1
)
7220 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7222 insn
= addi_12_12
| (allocate
& 0xffff);
7223 if (insn
!= addi_12_12
)
7225 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7231 insn
= addi_12_1
| (allocate
& 0xffff);
7232 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7235 if (pinsn
!= entry
+ 12)
7236 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7244 if (!object
->has_no_split_stack())
7245 object
->error(_("failed to match split-stack sequence at "
7246 "section %u offset %0zx"),
7247 shndx
, static_cast<size_t>(fnoffset
));
7251 // Scan relocations for a section.
7253 template<int size
, bool big_endian
>
7255 Target_powerpc
<size
, big_endian
>::scan_relocs(
7256 Symbol_table
* symtab
,
7258 Sized_relobj_file
<size
, big_endian
>* object
,
7259 unsigned int data_shndx
,
7260 unsigned int sh_type
,
7261 const unsigned char* prelocs
,
7263 Output_section
* output_section
,
7264 bool needs_special_offset_handling
,
7265 size_t local_symbol_count
,
7266 const unsigned char* plocal_symbols
)
7268 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7269 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7272 if (sh_type
== elfcpp::SHT_REL
)
7274 gold_error(_("%s: unsupported REL reloc section"),
7275 object
->name().c_str());
7279 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7288 needs_special_offset_handling
,
7293 // Functor class for processing the global symbol table.
7294 // Removes symbols defined on discarded opd entries.
7296 template<bool big_endian
>
7297 class Global_symbol_visitor_opd
7300 Global_symbol_visitor_opd()
7304 operator()(Sized_symbol
<64>* sym
)
7306 if (sym
->has_symtab_index()
7307 || sym
->source() != Symbol::FROM_OBJECT
7308 || !sym
->in_real_elf())
7311 if (sym
->object()->is_dynamic())
7314 Powerpc_relobj
<64, big_endian
>* symobj
7315 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
7316 if (symobj
->opd_shndx() == 0)
7320 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7321 if (shndx
== symobj
->opd_shndx()
7322 && symobj
->get_opd_discard(sym
->value()))
7324 sym
->set_undefined();
7325 sym
->set_visibility(elfcpp::STV_DEFAULT
);
7326 sym
->set_is_defined_in_discarded_section();
7327 sym
->set_symtab_index(-1U);
7332 template<int size
, bool big_endian
>
7334 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
7336 Symbol_table
* symtab
)
7340 Output_data_save_res
<size
, big_endian
>* savres
7341 = new Output_data_save_res
<size
, big_endian
>(symtab
);
7342 this->savres_section_
= savres
;
7343 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
7344 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
7345 savres
, ORDER_TEXT
, false);
7349 // Sort linker created .got section first (for the header), then input
7350 // sections belonging to files using small model code.
7352 template<bool big_endian
>
7353 class Sort_toc_sections
7357 operator()(const Output_section::Input_section
& is1
,
7358 const Output_section::Input_section
& is2
) const
7360 if (!is1
.is_input_section() && is2
.is_input_section())
7363 = (is1
.is_input_section()
7364 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
7365 ->has_small_toc_reloc()));
7367 = (is2
.is_input_section()
7368 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
7369 ->has_small_toc_reloc()));
7370 return small1
&& !small2
;
7374 // Finalize the sections.
7376 template<int size
, bool big_endian
>
7378 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
7380 const Input_objects
*,
7381 Symbol_table
* symtab
)
7383 if (parameters
->doing_static_link())
7385 // At least some versions of glibc elf-init.o have a strong
7386 // reference to __rela_iplt marker syms. A weak ref would be
7388 if (this->iplt_
!= NULL
)
7390 Reloc_section
* rel
= this->iplt_
->rel_plt();
7391 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
7392 Symbol_table::PREDEFINED
, rel
, 0, 0,
7393 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7394 elfcpp::STV_HIDDEN
, 0, false, true);
7395 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
7396 Symbol_table::PREDEFINED
, rel
, 0, 0,
7397 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7398 elfcpp::STV_HIDDEN
, 0, true, true);
7402 symtab
->define_as_constant("__rela_iplt_start", NULL
,
7403 Symbol_table::PREDEFINED
, 0, 0,
7404 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7405 elfcpp::STV_HIDDEN
, 0, true, false);
7406 symtab
->define_as_constant("__rela_iplt_end", NULL
,
7407 Symbol_table::PREDEFINED
, 0, 0,
7408 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7409 elfcpp::STV_HIDDEN
, 0, true, false);
7415 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
7416 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
7418 if (!parameters
->options().relocatable())
7420 this->define_save_restore_funcs(layout
, symtab
);
7422 // Annoyingly, we need to make these sections now whether or
7423 // not we need them. If we delay until do_relax then we
7424 // need to mess with the relaxation machinery checkpointing.
7425 this->got_section(symtab
, layout
);
7426 this->make_brlt_section(layout
);
7428 if (parameters
->options().toc_sort())
7430 Output_section
* os
= this->got_
->output_section();
7431 if (os
!= NULL
&& os
->input_sections().size() > 1)
7432 std::stable_sort(os
->input_sections().begin(),
7433 os
->input_sections().end(),
7434 Sort_toc_sections
<big_endian
>());
7439 // Fill in some more dynamic tags.
7440 Output_data_dynamic
* odyn
= layout
->dynamic_data();
7443 const Reloc_section
* rel_plt
= (this->plt_
== NULL
7445 : this->plt_
->rel_plt());
7446 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
7447 this->rela_dyn_
, true, size
== 32);
7451 if (this->got_
!= NULL
)
7453 this->got_
->finalize_data_size();
7454 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
7455 this->got_
, this->got_
->g_o_t());
7460 if (this->glink_
!= NULL
)
7462 this->glink_
->finalize_data_size();
7463 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
7465 (this->glink_
->pltresolve_size
7471 // Emit any relocs we saved in an attempt to avoid generating COPY
7473 if (this->copy_relocs_
.any_saved_relocs())
7474 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
7477 // Emit any saved relocs, and mark toc entries using any of these
7478 // relocs as not optimizable.
7480 template<int sh_type
, int size
, bool big_endian
>
7482 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
7483 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
7486 && parameters
->options().toc_optimize())
7488 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
7489 Copy_reloc_entries::iterator p
= this->entries_
.begin();
7490 p
!= this->entries_
.end();
7493 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
7496 // If the symbol is no longer defined in a dynamic object,
7497 // then we emitted a COPY relocation. If it is still
7498 // dynamic then we'll need dynamic relocations and thus
7499 // can't optimize toc entries.
7500 if (entry
.sym_
->is_from_dynobj())
7502 Powerpc_relobj
<size
, big_endian
>* ppc_object
7503 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
7504 if (entry
.shndx_
== ppc_object
->toc_shndx())
7505 ppc_object
->set_no_toc_opt(entry
.address_
);
7510 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
7513 // Return the value to use for a branch relocation.
7515 template<int size
, bool big_endian
>
7517 Target_powerpc
<size
, big_endian
>::symval_for_branch(
7518 const Symbol_table
* symtab
,
7519 const Sized_symbol
<size
>* gsym
,
7520 Powerpc_relobj
<size
, big_endian
>* object
,
7522 unsigned int *dest_shndx
)
7524 if (size
== 32 || this->abiversion() >= 2)
7528 // If the symbol is defined in an opd section, ie. is a function
7529 // descriptor, use the function descriptor code entry address
7530 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
7532 && (gsym
->source() != Symbol::FROM_OBJECT
7533 || gsym
->object()->is_dynamic()))
7536 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7537 unsigned int shndx
= symobj
->opd_shndx();
7540 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
7541 if (opd_addr
== invalid_address
)
7543 opd_addr
+= symobj
->output_section_address(shndx
);
7544 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
7547 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
7548 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
7551 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
7552 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
7553 *dest_shndx
= folded
.second
;
7555 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
7556 if (sec_addr
== invalid_address
)
7559 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
7560 *value
= sec_addr
+ sec_off
;
7565 // Perform a relocation.
7567 template<int size
, bool big_endian
>
7569 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
7570 const Relocate_info
<size
, big_endian
>* relinfo
,
7572 Target_powerpc
* target
,
7575 const unsigned char* preloc
,
7576 const Sized_symbol
<size
>* gsym
,
7577 const Symbol_value
<size
>* psymval
,
7578 unsigned char* view
,
7580 section_size_type view_size
)
7585 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
7586 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
7587 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7589 case Track_tls::NOT_EXPECTED
:
7590 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7591 _("__tls_get_addr call lacks marker reloc"));
7593 case Track_tls::EXPECTED
:
7594 // We have already complained.
7596 case Track_tls::SKIP
:
7598 case Track_tls::NORMAL
:
7602 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
7603 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
7604 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
7605 // Offset from start of insn to d-field reloc.
7606 const int d_offset
= big_endian
? 2 : 0;
7608 Powerpc_relobj
<size
, big_endian
>* const object
7609 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7611 bool has_stub_value
= false;
7612 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7614 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7615 : object
->local_has_plt_offset(r_sym
))
7616 && (!psymval
->is_ifunc_symbol()
7617 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7621 && target
->abiversion() >= 2
7622 && !parameters
->options().output_is_position_independent()
7623 && !is_branch_reloc(r_type
))
7625 Address off
= target
->glink_section()->find_global_entry(gsym
);
7626 if (off
!= invalid_address
)
7628 value
= target
->glink_section()->global_entry_address() + off
;
7629 has_stub_value
= true;
7634 Stub_table
<size
, big_endian
>* stub_table
7635 = object
->stub_table(relinfo
->data_shndx
);
7636 if (stub_table
== NULL
)
7638 // This is a ref from a data section to an ifunc symbol.
7639 if (target
->stub_tables().size() != 0)
7640 stub_table
= target
->stub_tables()[0];
7642 if (stub_table
!= NULL
)
7646 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7647 rela
.get_r_addend());
7649 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7650 rela
.get_r_addend());
7651 if (off
!= invalid_address
)
7653 value
= stub_table
->stub_address() + off
;
7654 has_stub_value
= true;
7658 // We don't care too much about bogus debug references to
7659 // non-local functions, but otherwise there had better be a plt
7660 // call stub or global entry stub as appropriate.
7661 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7664 if (r_type
== elfcpp::R_POWERPC_GOT16
7665 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7666 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7667 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7668 || r_type
== elfcpp::R_PPC64_GOT16_DS
7669 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7673 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7674 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7678 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7679 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7681 value
-= target
->got_section()->got_base_offset(object
);
7683 else if (r_type
== elfcpp::R_PPC64_TOC
)
7685 value
= (target
->got_section()->output_section()->address()
7686 + object
->toc_base_offset());
7688 else if (gsym
!= NULL
7689 && (r_type
== elfcpp::R_POWERPC_REL24
7690 || r_type
== elfcpp::R_PPC_PLTREL24
)
7695 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7696 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7697 bool can_plt_call
= false;
7698 if (rela
.get_r_offset() + 8 <= view_size
)
7700 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7701 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7704 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7706 elfcpp::Swap
<32, big_endian
>::
7707 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7708 can_plt_call
= true;
7713 // If we don't have a branch and link followed by a nop,
7714 // we can't go via the plt because there is no place to
7715 // put a toc restoring instruction.
7716 // Unless we know we won't be returning.
7717 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7718 can_plt_call
= true;
7722 // g++ as of 20130507 emits self-calls without a
7723 // following nop. This is arguably wrong since we have
7724 // conflicting information. On the one hand a global
7725 // symbol and on the other a local call sequence, but
7726 // don't error for this special case.
7727 // It isn't possible to cheaply verify we have exactly
7728 // such a call. Allow all calls to the same section.
7730 Address code
= value
;
7731 if (gsym
->source() == Symbol::FROM_OBJECT
7732 && gsym
->object() == object
)
7734 unsigned int dest_shndx
= 0;
7735 if (target
->abiversion() < 2)
7737 Address addend
= rela
.get_r_addend();
7738 code
= psymval
->value(object
, addend
);
7739 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7740 &code
, &dest_shndx
);
7743 if (dest_shndx
== 0)
7744 dest_shndx
= gsym
->shndx(&is_ordinary
);
7745 ok
= dest_shndx
== relinfo
->data_shndx
;
7749 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7750 _("call lacks nop, can't restore toc; "
7751 "recompile with -fPIC"));
7757 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7758 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7759 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7760 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7762 // First instruction of a global dynamic sequence, arg setup insn.
7763 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7764 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7765 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7766 if (tls_type
== tls::TLSOPT_NONE
)
7767 got_type
= GOT_TYPE_TLSGD
;
7768 else if (tls_type
== tls::TLSOPT_TO_IE
)
7769 got_type
= GOT_TYPE_TPREL
;
7770 if (got_type
!= GOT_TYPE_STANDARD
)
7774 gold_assert(gsym
->has_got_offset(got_type
));
7775 value
= gsym
->got_offset(got_type
);
7779 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7780 value
= object
->local_got_offset(r_sym
, got_type
);
7782 value
-= target
->got_section()->got_base_offset(object
);
7784 if (tls_type
== tls::TLSOPT_TO_IE
)
7786 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7787 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7789 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7790 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7791 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7793 insn
|= 32 << 26; // lwz
7795 insn
|= 58 << 26; // ld
7796 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7798 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7799 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7801 else if (tls_type
== tls::TLSOPT_TO_LE
)
7803 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7804 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7806 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7807 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7808 insn
&= (1 << 26) - (1 << 21); // extract rt
7813 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7814 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7815 value
= psymval
->value(object
, rela
.get_r_addend());
7819 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7821 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7822 r_type
= elfcpp::R_POWERPC_NONE
;
7826 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7827 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7828 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7829 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7831 // First instruction of a local dynamic sequence, arg setup insn.
7832 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7833 if (tls_type
== tls::TLSOPT_NONE
)
7835 value
= target
->tlsld_got_offset();
7836 value
-= target
->got_section()->got_base_offset(object
);
7840 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7841 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7842 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7844 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7845 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7846 insn
&= (1 << 26) - (1 << 21); // extract rt
7851 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7852 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7857 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7859 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7860 r_type
= elfcpp::R_POWERPC_NONE
;
7864 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7865 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7866 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7867 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7869 // Accesses relative to a local dynamic sequence address,
7870 // no optimisation here.
7873 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7874 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7878 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7879 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7881 value
-= target
->got_section()->got_base_offset(object
);
7883 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7884 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7885 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7886 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7888 // First instruction of initial exec sequence.
7889 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7890 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7891 if (tls_type
== tls::TLSOPT_NONE
)
7895 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7896 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7900 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7901 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7903 value
-= target
->got_section()->got_base_offset(object
);
7907 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7908 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7909 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7911 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7912 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7913 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7918 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7919 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7920 value
= psymval
->value(object
, rela
.get_r_addend());
7924 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7926 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7927 r_type
= elfcpp::R_POWERPC_NONE
;
7931 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7932 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7934 // Second instruction of a global dynamic sequence,
7935 // the __tls_get_addr call
7936 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7937 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7938 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7939 if (tls_type
!= tls::TLSOPT_NONE
)
7941 if (tls_type
== tls::TLSOPT_TO_IE
)
7943 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7944 Insn insn
= add_3_3_13
;
7947 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7948 r_type
= elfcpp::R_POWERPC_NONE
;
7952 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7953 Insn insn
= addi_3_3
;
7954 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7955 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7957 value
= psymval
->value(object
, rela
.get_r_addend());
7959 this->skip_next_tls_get_addr_call();
7962 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7963 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7965 // Second instruction of a local dynamic sequence,
7966 // the __tls_get_addr call
7967 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7968 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7969 if (tls_type
== tls::TLSOPT_TO_LE
)
7971 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7972 Insn insn
= addi_3_3
;
7973 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7974 this->skip_next_tls_get_addr_call();
7975 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7980 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7982 // Second instruction of an initial exec sequence
7983 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7984 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7985 if (tls_type
== tls::TLSOPT_TO_LE
)
7987 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7988 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7989 unsigned int reg
= size
== 32 ? 2 : 13;
7990 insn
= at_tls_transform(insn
, reg
);
7991 gold_assert(insn
!= 0);
7992 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7993 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7995 value
= psymval
->value(object
, rela
.get_r_addend());
7998 else if (!has_stub_value
)
8001 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8002 addend
= rela
.get_r_addend();
8003 value
= psymval
->value(object
, addend
);
8004 if (size
== 64 && is_branch_reloc(r_type
))
8006 if (target
->abiversion() >= 2)
8009 value
+= object
->ppc64_local_entry_offset(gsym
);
8011 value
+= object
->ppc64_local_entry_offset(r_sym
);
8015 unsigned int dest_shndx
;
8016 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8017 &value
, &dest_shndx
);
8020 Address max_branch_offset
= max_branch_delta(r_type
);
8021 if (max_branch_offset
!= 0
8022 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8024 Stub_table
<size
, big_endian
>* stub_table
8025 = object
->stub_table(relinfo
->data_shndx
);
8026 if (stub_table
!= NULL
)
8028 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8029 if (off
!= invalid_address
)
8031 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8033 has_stub_value
= true;
8041 case elfcpp::R_PPC64_REL64
:
8042 case elfcpp::R_POWERPC_REL32
:
8043 case elfcpp::R_POWERPC_REL24
:
8044 case elfcpp::R_PPC_PLTREL24
:
8045 case elfcpp::R_PPC_LOCAL24PC
:
8046 case elfcpp::R_POWERPC_REL16
:
8047 case elfcpp::R_POWERPC_REL16_LO
:
8048 case elfcpp::R_POWERPC_REL16_HI
:
8049 case elfcpp::R_POWERPC_REL16_HA
:
8050 case elfcpp::R_POWERPC_REL16DX_HA
:
8051 case elfcpp::R_POWERPC_REL14
:
8052 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8053 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8057 case elfcpp::R_PPC64_TOC16
:
8058 case elfcpp::R_PPC64_TOC16_LO
:
8059 case elfcpp::R_PPC64_TOC16_HI
:
8060 case elfcpp::R_PPC64_TOC16_HA
:
8061 case elfcpp::R_PPC64_TOC16_DS
:
8062 case elfcpp::R_PPC64_TOC16_LO_DS
:
8063 // Subtract the TOC base address.
8064 value
-= (target
->got_section()->output_section()->address()
8065 + object
->toc_base_offset());
8068 case elfcpp::R_POWERPC_SECTOFF
:
8069 case elfcpp::R_POWERPC_SECTOFF_LO
:
8070 case elfcpp::R_POWERPC_SECTOFF_HI
:
8071 case elfcpp::R_POWERPC_SECTOFF_HA
:
8072 case elfcpp::R_PPC64_SECTOFF_DS
:
8073 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8075 value
-= os
->address();
8078 case elfcpp::R_PPC64_TPREL16_DS
:
8079 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8080 case elfcpp::R_PPC64_TPREL16_HIGH
:
8081 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8083 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8086 case elfcpp::R_POWERPC_TPREL16
:
8087 case elfcpp::R_POWERPC_TPREL16_LO
:
8088 case elfcpp::R_POWERPC_TPREL16_HI
:
8089 case elfcpp::R_POWERPC_TPREL16_HA
:
8090 case elfcpp::R_POWERPC_TPREL
:
8091 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8092 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8093 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8094 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8095 // tls symbol values are relative to tls_segment()->vaddr()
8099 case elfcpp::R_PPC64_DTPREL16_DS
:
8100 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8101 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8102 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8103 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8104 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8106 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8107 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8110 case elfcpp::R_POWERPC_DTPREL16
:
8111 case elfcpp::R_POWERPC_DTPREL16_LO
:
8112 case elfcpp::R_POWERPC_DTPREL16_HI
:
8113 case elfcpp::R_POWERPC_DTPREL16_HA
:
8114 case elfcpp::R_POWERPC_DTPREL
:
8115 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8116 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8117 // tls symbol values are relative to tls_segment()->vaddr()
8118 value
-= dtp_offset
;
8121 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8123 value
+= object
->ppc64_local_entry_offset(gsym
);
8125 value
+= object
->ppc64_local_entry_offset(r_sym
);
8132 Insn branch_bit
= 0;
8135 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8136 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8137 branch_bit
= 1 << 21;
8139 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8140 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8142 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8143 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8146 if (this->is_isa_v2
)
8148 // Set 'a' bit. This is 0b00010 in BO field for branch
8149 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8150 // for branch on CTR insns (BO == 1a00t or 1a01t).
8151 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8153 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8160 // Invert 'y' bit if not the default.
8161 if (static_cast<Signed_address
>(value
) < 0)
8164 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8179 // Multi-instruction sequences that access the GOT/TOC can
8180 // be optimized, eg.
8181 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8182 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8184 // addis ra,r2,0; addi rb,ra,x@toc@l;
8185 // to nop; addi rb,r2,x@toc;
8186 // FIXME: the @got sequence shown above is not yet
8187 // optimized. Note that gcc as of 2017-01-07 doesn't use
8188 // the ELF @got relocs except for TLS, instead using the
8189 // PowerOpen variant of a compiler managed GOT (called TOC).
8190 // The PowerOpen TOC sequence equivalent to the first
8191 // example is optimized.
8192 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8193 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8194 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8195 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8196 case elfcpp::R_POWERPC_GOT16_HA
:
8197 case elfcpp::R_PPC64_TOC16_HA
:
8198 if (parameters
->options().toc_optimize())
8200 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8201 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8202 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8203 && object
->make_toc_relative(target
, &value
))
8205 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8206 == ((15u << 26) | (2 << 16)));
8208 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8209 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8210 && value
+ 0x8000 < 0x10000)
8212 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8218 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8219 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8220 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8221 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8222 case elfcpp::R_POWERPC_GOT16_LO
:
8223 case elfcpp::R_PPC64_GOT16_LO_DS
:
8224 case elfcpp::R_PPC64_TOC16_LO
:
8225 case elfcpp::R_PPC64_TOC16_LO_DS
:
8226 if (parameters
->options().toc_optimize())
8228 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8229 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8230 bool changed
= false;
8231 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
8232 && object
->make_toc_relative(target
, &value
))
8234 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
8235 insn
^= (14u << 26) ^ (58u << 26);
8236 r_type
= elfcpp::R_PPC64_TOC16_LO
;
8239 if (ok_lo_toc_insn(insn
, r_type
)
8240 && value
+ 0x8000 < 0x10000)
8242 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
8244 // Transform addic to addi when we change reg.
8245 insn
&= ~((0x3f << 26) | (0x1f << 16));
8246 insn
|= (14u << 26) | (2 << 16);
8250 insn
&= ~(0x1f << 16);
8256 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8260 case elfcpp::R_PPC64_ENTRY
:
8261 value
= (target
->got_section()->output_section()->address()
8262 + object
->toc_base_offset());
8263 if (value
+ 0x80008000 <= 0xffffffff
8264 && !parameters
->options().output_is_position_independent())
8266 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8267 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8268 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8270 if ((insn1
& ~0xfffc) == ld_2_12
8271 && insn2
== add_2_2_12
)
8273 insn1
= lis_2
+ ha(value
);
8274 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8275 insn2
= addi_2_2
+ l(value
);
8276 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8283 if (value
+ 0x80008000 <= 0xffffffff)
8285 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8286 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8287 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8289 if ((insn1
& ~0xfffc) == ld_2_12
8290 && insn2
== add_2_2_12
)
8292 insn1
= addis_2_12
+ ha(value
);
8293 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8294 insn2
= addi_2_2
+ l(value
);
8295 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8302 case elfcpp::R_POWERPC_REL16_LO
:
8303 // If we are generating a non-PIC executable, edit
8304 // 0: addis 2,12,.TOC.-0b@ha
8305 // addi 2,2,.TOC.-0b@l
8306 // used by ELFv2 global entry points to set up r2, to
8309 // if .TOC. is in range. */
8310 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
8313 && target
->abiversion() >= 2
8314 && !parameters
->options().output_is_position_independent()
8315 && rela
.get_r_addend() == d_offset
+ 4
8317 && strcmp(gsym
->name(), ".TOC.") == 0)
8319 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8320 Reltype
prev_rela(preloc
- reloc_size
);
8321 if ((prev_rela
.get_r_info()
8322 == elfcpp::elf_r_info
<size
>(r_sym
,
8323 elfcpp::R_POWERPC_REL16_HA
))
8324 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
8325 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
8327 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8328 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
8329 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8331 if ((insn1
& 0xffff0000) == addis_2_12
8332 && (insn2
& 0xffff0000) == addi_2_2
)
8334 insn1
= lis_2
+ ha(value
+ address
- 4);
8335 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
8336 insn2
= addi_2_2
+ l(value
+ address
- 4);
8337 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
8340 relinfo
->rr
->set_strategy(relnum
- 1,
8341 Relocatable_relocs::RELOC_SPECIAL
);
8342 relinfo
->rr
->set_strategy(relnum
,
8343 Relocatable_relocs::RELOC_SPECIAL
);
8353 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
8354 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
8357 case elfcpp::R_POWERPC_ADDR32
:
8358 case elfcpp::R_POWERPC_UADDR32
:
8360 overflow
= Reloc::CHECK_BITFIELD
;
8363 case elfcpp::R_POWERPC_REL32
:
8364 case elfcpp::R_POWERPC_REL16DX_HA
:
8366 overflow
= Reloc::CHECK_SIGNED
;
8369 case elfcpp::R_POWERPC_UADDR16
:
8370 overflow
= Reloc::CHECK_BITFIELD
;
8373 case elfcpp::R_POWERPC_ADDR16
:
8374 // We really should have three separate relocations,
8375 // one for 16-bit data, one for insns with 16-bit signed fields,
8376 // and one for insns with 16-bit unsigned fields.
8377 overflow
= Reloc::CHECK_BITFIELD
;
8378 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
8379 overflow
= Reloc::CHECK_LOW_INSN
;
8382 case elfcpp::R_POWERPC_ADDR16_HI
:
8383 case elfcpp::R_POWERPC_ADDR16_HA
:
8384 case elfcpp::R_POWERPC_GOT16_HI
:
8385 case elfcpp::R_POWERPC_GOT16_HA
:
8386 case elfcpp::R_POWERPC_PLT16_HI
:
8387 case elfcpp::R_POWERPC_PLT16_HA
:
8388 case elfcpp::R_POWERPC_SECTOFF_HI
:
8389 case elfcpp::R_POWERPC_SECTOFF_HA
:
8390 case elfcpp::R_PPC64_TOC16_HI
:
8391 case elfcpp::R_PPC64_TOC16_HA
:
8392 case elfcpp::R_PPC64_PLTGOT16_HI
:
8393 case elfcpp::R_PPC64_PLTGOT16_HA
:
8394 case elfcpp::R_POWERPC_TPREL16_HI
:
8395 case elfcpp::R_POWERPC_TPREL16_HA
:
8396 case elfcpp::R_POWERPC_DTPREL16_HI
:
8397 case elfcpp::R_POWERPC_DTPREL16_HA
:
8398 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8399 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8400 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8401 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8402 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8403 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8404 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8405 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8406 case elfcpp::R_POWERPC_REL16_HI
:
8407 case elfcpp::R_POWERPC_REL16_HA
:
8409 overflow
= Reloc::CHECK_HIGH_INSN
;
8412 case elfcpp::R_POWERPC_REL16
:
8413 case elfcpp::R_PPC64_TOC16
:
8414 case elfcpp::R_POWERPC_GOT16
:
8415 case elfcpp::R_POWERPC_SECTOFF
:
8416 case elfcpp::R_POWERPC_TPREL16
:
8417 case elfcpp::R_POWERPC_DTPREL16
:
8418 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8419 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8420 case elfcpp::R_POWERPC_GOT_TPREL16
:
8421 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8422 overflow
= Reloc::CHECK_LOW_INSN
;
8425 case elfcpp::R_POWERPC_ADDR24
:
8426 case elfcpp::R_POWERPC_ADDR14
:
8427 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8428 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8429 case elfcpp::R_PPC64_ADDR16_DS
:
8430 case elfcpp::R_POWERPC_REL24
:
8431 case elfcpp::R_PPC_PLTREL24
:
8432 case elfcpp::R_PPC_LOCAL24PC
:
8433 case elfcpp::R_PPC64_TPREL16_DS
:
8434 case elfcpp::R_PPC64_DTPREL16_DS
:
8435 case elfcpp::R_PPC64_TOC16_DS
:
8436 case elfcpp::R_PPC64_GOT16_DS
:
8437 case elfcpp::R_PPC64_SECTOFF_DS
:
8438 case elfcpp::R_POWERPC_REL14
:
8439 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8440 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8441 overflow
= Reloc::CHECK_SIGNED
;
8445 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8448 if (overflow
== Reloc::CHECK_LOW_INSN
8449 || overflow
== Reloc::CHECK_HIGH_INSN
)
8451 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8453 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
8454 overflow
= Reloc::CHECK_BITFIELD
;
8455 else if (overflow
== Reloc::CHECK_LOW_INSN
8456 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
8457 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
8458 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
8459 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
8460 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
8461 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
8462 overflow
= Reloc::CHECK_UNSIGNED
;
8464 overflow
= Reloc::CHECK_SIGNED
;
8467 bool maybe_dq_reloc
= false;
8468 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
8469 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
8472 case elfcpp::R_POWERPC_NONE
:
8473 case elfcpp::R_POWERPC_TLS
:
8474 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
8475 case elfcpp::R_POWERPC_GNU_VTENTRY
:
8478 case elfcpp::R_PPC64_ADDR64
:
8479 case elfcpp::R_PPC64_REL64
:
8480 case elfcpp::R_PPC64_TOC
:
8481 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8482 Reloc::addr64(view
, value
);
8485 case elfcpp::R_POWERPC_TPREL
:
8486 case elfcpp::R_POWERPC_DTPREL
:
8488 Reloc::addr64(view
, value
);
8490 status
= Reloc::addr32(view
, value
, overflow
);
8493 case elfcpp::R_PPC64_UADDR64
:
8494 Reloc::addr64_u(view
, value
);
8497 case elfcpp::R_POWERPC_ADDR32
:
8498 status
= Reloc::addr32(view
, value
, overflow
);
8501 case elfcpp::R_POWERPC_REL32
:
8502 case elfcpp::R_POWERPC_UADDR32
:
8503 status
= Reloc::addr32_u(view
, value
, overflow
);
8506 case elfcpp::R_POWERPC_ADDR24
:
8507 case elfcpp::R_POWERPC_REL24
:
8508 case elfcpp::R_PPC_PLTREL24
:
8509 case elfcpp::R_PPC_LOCAL24PC
:
8510 status
= Reloc::addr24(view
, value
, overflow
);
8513 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8514 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8515 case elfcpp::R_POWERPC_GOT_TPREL16
:
8516 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8519 // On ppc64 these are all ds form
8520 maybe_dq_reloc
= true;
8524 case elfcpp::R_POWERPC_ADDR16
:
8525 case elfcpp::R_POWERPC_REL16
:
8526 case elfcpp::R_PPC64_TOC16
:
8527 case elfcpp::R_POWERPC_GOT16
:
8528 case elfcpp::R_POWERPC_SECTOFF
:
8529 case elfcpp::R_POWERPC_TPREL16
:
8530 case elfcpp::R_POWERPC_DTPREL16
:
8531 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8532 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8533 case elfcpp::R_POWERPC_ADDR16_LO
:
8534 case elfcpp::R_POWERPC_REL16_LO
:
8535 case elfcpp::R_PPC64_TOC16_LO
:
8536 case elfcpp::R_POWERPC_GOT16_LO
:
8537 case elfcpp::R_POWERPC_SECTOFF_LO
:
8538 case elfcpp::R_POWERPC_TPREL16_LO
:
8539 case elfcpp::R_POWERPC_DTPREL16_LO
:
8540 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8541 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8543 status
= Reloc::addr16(view
, value
, overflow
);
8545 maybe_dq_reloc
= true;
8548 case elfcpp::R_POWERPC_UADDR16
:
8549 status
= Reloc::addr16_u(view
, value
, overflow
);
8552 case elfcpp::R_PPC64_ADDR16_HIGH
:
8553 case elfcpp::R_PPC64_TPREL16_HIGH
:
8554 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8556 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
8559 case elfcpp::R_POWERPC_ADDR16_HI
:
8560 case elfcpp::R_POWERPC_REL16_HI
:
8561 case elfcpp::R_PPC64_TOC16_HI
:
8562 case elfcpp::R_POWERPC_GOT16_HI
:
8563 case elfcpp::R_POWERPC_SECTOFF_HI
:
8564 case elfcpp::R_POWERPC_TPREL16_HI
:
8565 case elfcpp::R_POWERPC_DTPREL16_HI
:
8566 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8567 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8568 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8569 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8570 Reloc::addr16_hi(view
, value
);
8573 case elfcpp::R_PPC64_ADDR16_HIGHA
:
8574 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8575 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8577 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
8580 case elfcpp::R_POWERPC_ADDR16_HA
:
8581 case elfcpp::R_POWERPC_REL16_HA
:
8582 case elfcpp::R_PPC64_TOC16_HA
:
8583 case elfcpp::R_POWERPC_GOT16_HA
:
8584 case elfcpp::R_POWERPC_SECTOFF_HA
:
8585 case elfcpp::R_POWERPC_TPREL16_HA
:
8586 case elfcpp::R_POWERPC_DTPREL16_HA
:
8587 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8588 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8589 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8590 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8591 Reloc::addr16_ha(view
, value
);
8594 case elfcpp::R_POWERPC_REL16DX_HA
:
8595 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
8598 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8600 // R_PPC_EMB_NADDR16_LO
8603 case elfcpp::R_PPC64_ADDR16_HIGHER
:
8604 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8605 Reloc::addr16_hi2(view
, value
);
8608 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8610 // R_PPC_EMB_NADDR16_HI
8613 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
8614 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8615 Reloc::addr16_ha2(view
, value
);
8618 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8620 // R_PPC_EMB_NADDR16_HA
8623 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
8624 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8625 Reloc::addr16_hi3(view
, value
);
8628 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8633 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
8634 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8635 Reloc::addr16_ha3(view
, value
);
8638 case elfcpp::R_PPC64_DTPREL16_DS
:
8639 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8641 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
8644 case elfcpp::R_PPC64_TPREL16_DS
:
8645 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8647 // R_PPC_TLSGD, R_PPC_TLSLD
8650 case elfcpp::R_PPC64_ADDR16_DS
:
8651 case elfcpp::R_PPC64_ADDR16_LO_DS
:
8652 case elfcpp::R_PPC64_TOC16_DS
:
8653 case elfcpp::R_PPC64_TOC16_LO_DS
:
8654 case elfcpp::R_PPC64_GOT16_DS
:
8655 case elfcpp::R_PPC64_GOT16_LO_DS
:
8656 case elfcpp::R_PPC64_SECTOFF_DS
:
8657 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8658 maybe_dq_reloc
= true;
8661 case elfcpp::R_POWERPC_ADDR14
:
8662 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8663 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8664 case elfcpp::R_POWERPC_REL14
:
8665 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8666 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8667 status
= Reloc::addr14(view
, value
, overflow
);
8670 case elfcpp::R_POWERPC_COPY
:
8671 case elfcpp::R_POWERPC_GLOB_DAT
:
8672 case elfcpp::R_POWERPC_JMP_SLOT
:
8673 case elfcpp::R_POWERPC_RELATIVE
:
8674 case elfcpp::R_POWERPC_DTPMOD
:
8675 case elfcpp::R_PPC64_JMP_IREL
:
8676 case elfcpp::R_POWERPC_IRELATIVE
:
8677 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8678 _("unexpected reloc %u in object file"),
8682 case elfcpp::R_PPC_EMB_SDA21
:
8687 // R_PPC64_TOCSAVE. For the time being this can be ignored.
8691 case elfcpp::R_PPC_EMB_SDA2I16
:
8692 case elfcpp::R_PPC_EMB_SDA2REL
:
8695 // R_PPC64_TLSGD, R_PPC64_TLSLD
8698 case elfcpp::R_POWERPC_PLT32
:
8699 case elfcpp::R_POWERPC_PLTREL32
:
8700 case elfcpp::R_POWERPC_PLT16_LO
:
8701 case elfcpp::R_POWERPC_PLT16_HI
:
8702 case elfcpp::R_POWERPC_PLT16_HA
:
8703 case elfcpp::R_PPC_SDAREL16
:
8704 case elfcpp::R_POWERPC_ADDR30
:
8705 case elfcpp::R_PPC64_PLT64
:
8706 case elfcpp::R_PPC64_PLTREL64
:
8707 case elfcpp::R_PPC64_PLTGOT16
:
8708 case elfcpp::R_PPC64_PLTGOT16_LO
:
8709 case elfcpp::R_PPC64_PLTGOT16_HI
:
8710 case elfcpp::R_PPC64_PLTGOT16_HA
:
8711 case elfcpp::R_PPC64_PLT16_LO_DS
:
8712 case elfcpp::R_PPC64_PLTGOT16_DS
:
8713 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
8714 case elfcpp::R_PPC_EMB_RELSDA
:
8715 case elfcpp::R_PPC_TOC16
:
8718 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8719 _("unsupported reloc %u"),
8727 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8729 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
8730 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8731 && (insn
& 3) == 1))
8732 status
= Reloc::addr16_dq(view
, value
, overflow
);
8734 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8735 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8736 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
8737 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
8738 status
= Reloc::addr16_ds(view
, value
, overflow
);
8740 status
= Reloc::addr16(view
, value
, overflow
);
8743 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
8746 && gsym
->is_undefined()
8747 && is_branch_reloc(r_type
))))
8749 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8750 _("relocation overflow"));
8752 gold_info(_("try relinking with a smaller --stub-group-size"));
8758 // Relocate section data.
8760 template<int size
, bool big_endian
>
8762 Target_powerpc
<size
, big_endian
>::relocate_section(
8763 const Relocate_info
<size
, big_endian
>* relinfo
,
8764 unsigned int sh_type
,
8765 const unsigned char* prelocs
,
8767 Output_section
* output_section
,
8768 bool needs_special_offset_handling
,
8769 unsigned char* view
,
8771 section_size_type view_size
,
8772 const Reloc_symbol_changes
* reloc_symbol_changes
)
8774 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8775 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8776 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8777 Powerpc_comdat_behavior
;
8778 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8781 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8783 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
8784 Powerpc_comdat_behavior
, Classify_reloc
>(
8790 needs_special_offset_handling
,
8794 reloc_symbol_changes
);
8797 template<int size
, bool big_endian
>
8798 class Powerpc_scan_relocatable_reloc
8801 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8802 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8803 static const int sh_type
= elfcpp::SHT_RELA
;
8805 // Return the symbol referred to by the relocation.
8806 static inline unsigned int
8807 get_r_sym(const Reltype
* reloc
)
8808 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
8810 // Return the type of the relocation.
8811 static inline unsigned int
8812 get_r_type(const Reltype
* reloc
)
8813 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
8815 // Return the strategy to use for a local symbol which is not a
8816 // section symbol, given the relocation type.
8817 inline Relocatable_relocs::Reloc_strategy
8818 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8820 if (r_type
== 0 && r_sym
== 0)
8821 return Relocatable_relocs::RELOC_DISCARD
;
8822 return Relocatable_relocs::RELOC_COPY
;
8825 // Return the strategy to use for a local symbol which is a section
8826 // symbol, given the relocation type.
8827 inline Relocatable_relocs::Reloc_strategy
8828 local_section_strategy(unsigned int, Relobj
*)
8830 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8833 // Return the strategy to use for a global symbol, given the
8834 // relocation type, the object, and the symbol index.
8835 inline Relocatable_relocs::Reloc_strategy
8836 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8838 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8839 return Relocatable_relocs::RELOC_SPECIAL
;
8840 return Relocatable_relocs::RELOC_COPY
;
8844 // Scan the relocs during a relocatable link.
8846 template<int size
, bool big_endian
>
8848 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8849 Symbol_table
* symtab
,
8851 Sized_relobj_file
<size
, big_endian
>* object
,
8852 unsigned int data_shndx
,
8853 unsigned int sh_type
,
8854 const unsigned char* prelocs
,
8856 Output_section
* output_section
,
8857 bool needs_special_offset_handling
,
8858 size_t local_symbol_count
,
8859 const unsigned char* plocal_symbols
,
8860 Relocatable_relocs
* rr
)
8862 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
8864 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8866 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
8874 needs_special_offset_handling
,
8880 // Scan the relocs for --emit-relocs.
8882 template<int size
, bool big_endian
>
8884 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
8885 Symbol_table
* symtab
,
8887 Sized_relobj_file
<size
, big_endian
>* object
,
8888 unsigned int data_shndx
,
8889 unsigned int sh_type
,
8890 const unsigned char* prelocs
,
8892 Output_section
* output_section
,
8893 bool needs_special_offset_handling
,
8894 size_t local_symbol_count
,
8895 const unsigned char* plocal_syms
,
8896 Relocatable_relocs
* rr
)
8898 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8900 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
8901 Emit_relocs_strategy
;
8903 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8905 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
8913 needs_special_offset_handling
,
8919 // Emit relocations for a section.
8920 // This is a modified version of the function by the same name in
8921 // target-reloc.h. Using relocate_special_relocatable for
8922 // R_PPC_PLTREL24 would require duplication of the entire body of the
8923 // loop, so we may as well duplicate the whole thing.
8925 template<int size
, bool big_endian
>
8927 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8928 const Relocate_info
<size
, big_endian
>* relinfo
,
8929 unsigned int sh_type
,
8930 const unsigned char* prelocs
,
8932 Output_section
* output_section
,
8933 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8935 Address view_address
,
8937 unsigned char* reloc_view
,
8938 section_size_type reloc_view_size
)
8940 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8942 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8943 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
8944 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8945 // Offset from start of insn to d-field reloc.
8946 const int d_offset
= big_endian
? 2 : 0;
8948 Powerpc_relobj
<size
, big_endian
>* const object
8949 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8950 const unsigned int local_count
= object
->local_symbol_count();
8951 unsigned int got2_shndx
= object
->got2_shndx();
8952 Address got2_addend
= 0;
8953 if (got2_shndx
!= 0)
8955 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8956 gold_assert(got2_addend
!= invalid_address
);
8959 unsigned char* pwrite
= reloc_view
;
8960 bool zap_next
= false;
8961 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8963 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
8964 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8967 Reltype
reloc(prelocs
);
8968 Reltype_write
reloc_write(pwrite
);
8970 Address offset
= reloc
.get_r_offset();
8971 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8972 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8973 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8974 const unsigned int orig_r_sym
= r_sym
;
8975 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8976 = reloc
.get_r_addend();
8977 const Symbol
* gsym
= NULL
;
8981 // We could arrange to discard these and other relocs for
8982 // tls optimised sequences in the strategy methods, but for
8983 // now do as BFD ld does.
8984 r_type
= elfcpp::R_POWERPC_NONE
;
8988 // Get the new symbol index.
8989 Output_section
* os
= NULL
;
8990 if (r_sym
< local_count
)
8994 case Relocatable_relocs::RELOC_COPY
:
8995 case Relocatable_relocs::RELOC_SPECIAL
:
8998 r_sym
= object
->symtab_index(r_sym
);
8999 gold_assert(r_sym
!= -1U);
9003 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9005 // We are adjusting a section symbol. We need to find
9006 // the symbol table index of the section symbol for
9007 // the output section corresponding to input section
9008 // in which this symbol is defined.
9009 gold_assert(r_sym
< local_count
);
9011 unsigned int shndx
=
9012 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9013 gold_assert(is_ordinary
);
9014 os
= object
->output_section(shndx
);
9015 gold_assert(os
!= NULL
);
9016 gold_assert(os
->needs_symtab_index());
9017 r_sym
= os
->symtab_index();
9027 gsym
= object
->global_symbol(r_sym
);
9028 gold_assert(gsym
!= NULL
);
9029 if (gsym
->is_forwarder())
9030 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9032 gold_assert(gsym
->has_symtab_index());
9033 r_sym
= gsym
->symtab_index();
9036 // Get the new offset--the location in the output section where
9037 // this relocation should be applied.
9038 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9039 offset
+= offset_in_output_section
;
9042 section_offset_type sot_offset
=
9043 convert_types
<section_offset_type
, Address
>(offset
);
9044 section_offset_type new_sot_offset
=
9045 output_section
->output_offset(object
, relinfo
->data_shndx
,
9047 gold_assert(new_sot_offset
!= -1);
9048 offset
= new_sot_offset
;
9051 // In an object file, r_offset is an offset within the section.
9052 // In an executable or dynamic object, generated by
9053 // --emit-relocs, r_offset is an absolute address.
9054 if (!parameters
->options().relocatable())
9056 offset
+= view_address
;
9057 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9058 offset
-= offset_in_output_section
;
9061 // Handle the reloc addend based on the strategy.
9062 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9064 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9066 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9067 gold_assert(os
!= NULL
);
9068 addend
= psymval
->value(object
, addend
) - os
->address();
9070 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9074 if (addend
>= 32768)
9075 addend
+= got2_addend
;
9077 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9079 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9082 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9084 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9085 addend
-= d_offset
+ 4;
9091 if (!parameters
->options().relocatable())
9093 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9094 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9095 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9096 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9098 // First instruction of a global dynamic sequence,
9100 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9101 switch (this->optimize_tls_gd(final
))
9103 case tls::TLSOPT_TO_IE
:
9104 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9105 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9107 case tls::TLSOPT_TO_LE
:
9108 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9109 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9110 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9113 r_type
= elfcpp::R_POWERPC_NONE
;
9121 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9122 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9123 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9124 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9126 // First instruction of a local dynamic sequence,
9128 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9130 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9131 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9133 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9134 const Output_section
* os
= relinfo
->layout
->tls_segment()
9136 gold_assert(os
!= NULL
);
9137 gold_assert(os
->needs_symtab_index());
9138 r_sym
= os
->symtab_index();
9139 addend
= dtp_offset
;
9143 r_type
= elfcpp::R_POWERPC_NONE
;
9148 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9149 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9150 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9151 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9153 // First instruction of initial exec sequence.
9154 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9155 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9157 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9158 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9159 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9162 r_type
= elfcpp::R_POWERPC_NONE
;
9167 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9168 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9170 // Second instruction of a global dynamic sequence,
9171 // the __tls_get_addr call
9172 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9173 switch (this->optimize_tls_gd(final
))
9175 case tls::TLSOPT_TO_IE
:
9176 r_type
= elfcpp::R_POWERPC_NONE
;
9179 case tls::TLSOPT_TO_LE
:
9180 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9188 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
9189 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
9191 // Second instruction of a local dynamic sequence,
9192 // the __tls_get_addr call
9193 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9195 const Output_section
* os
= relinfo
->layout
->tls_segment()
9197 gold_assert(os
!= NULL
);
9198 gold_assert(os
->needs_symtab_index());
9199 r_sym
= os
->symtab_index();
9200 addend
= dtp_offset
;
9201 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9206 else if (r_type
== elfcpp::R_POWERPC_TLS
)
9208 // Second instruction of an initial exec sequence
9209 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9210 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9212 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9218 reloc_write
.put_r_offset(offset
);
9219 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
9220 reloc_write
.put_r_addend(addend
);
9222 pwrite
+= reloc_size
;
9225 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
9226 == reloc_view_size
);
9229 // Return the value to use for a dynamic symbol which requires special
9230 // treatment. This is how we support equality comparisons of function
9231 // pointers across shared library boundaries, as described in the
9232 // processor specific ABI supplement.
9234 template<int size
, bool big_endian
>
9236 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
9240 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
9241 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9242 p
!= this->stub_tables_
.end();
9245 Address off
= (*p
)->find_plt_call_entry(gsym
);
9246 if (off
!= invalid_address
)
9247 return (*p
)->stub_address() + off
;
9250 else if (this->abiversion() >= 2)
9252 Address off
= this->glink_section()->find_global_entry(gsym
);
9253 if (off
!= invalid_address
)
9254 return this->glink_section()->global_entry_address() + off
;
9259 // Return the PLT address to use for a local symbol.
9260 template<int size
, bool big_endian
>
9262 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
9263 const Relobj
* object
,
9264 unsigned int symndx
) const
9268 const Sized_relobj
<size
, big_endian
>* relobj
9269 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
9270 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9271 p
!= this->stub_tables_
.end();
9274 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
9276 if (off
!= invalid_address
)
9277 return (*p
)->stub_address() + off
;
9283 // Return the PLT address to use for a global symbol.
9284 template<int size
, bool big_endian
>
9286 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
9287 const Symbol
* gsym
) const
9291 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9292 p
!= this->stub_tables_
.end();
9295 Address off
= (*p
)->find_plt_call_entry(gsym
);
9296 if (off
!= invalid_address
)
9297 return (*p
)->stub_address() + off
;
9300 else if (this->abiversion() >= 2)
9302 Address off
= this->glink_section()->find_global_entry(gsym
);
9303 if (off
!= invalid_address
)
9304 return this->glink_section()->global_entry_address() + off
;
9309 // Return the offset to use for the GOT_INDX'th got entry which is
9310 // for a local tls symbol specified by OBJECT, SYMNDX.
9311 template<int size
, bool big_endian
>
9313 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
9314 const Relobj
* object
,
9315 unsigned int symndx
,
9316 unsigned int got_indx
) const
9318 const Powerpc_relobj
<size
, big_endian
>* ppc_object
9319 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
9320 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
9322 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9323 got_type
<= GOT_TYPE_TPREL
;
9324 got_type
= Got_type(got_type
+ 1))
9325 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
9327 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
9328 if (got_type
== GOT_TYPE_TLSGD
)
9330 if (off
== got_indx
* (size
/ 8))
9332 if (got_type
== GOT_TYPE_TPREL
)
9342 // Return the offset to use for the GOT_INDX'th got entry which is
9343 // for global tls symbol GSYM.
9344 template<int size
, bool big_endian
>
9346 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
9348 unsigned int got_indx
) const
9350 if (gsym
->type() == elfcpp::STT_TLS
)
9352 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9353 got_type
<= GOT_TYPE_TPREL
;
9354 got_type
= Got_type(got_type
+ 1))
9355 if (gsym
->has_got_offset(got_type
))
9357 unsigned int off
= gsym
->got_offset(got_type
);
9358 if (got_type
== GOT_TYPE_TLSGD
)
9360 if (off
== got_indx
* (size
/ 8))
9362 if (got_type
== GOT_TYPE_TPREL
)
9372 // The selector for powerpc object files.
9374 template<int size
, bool big_endian
>
9375 class Target_selector_powerpc
: public Target_selector
9378 Target_selector_powerpc()
9379 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
9382 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
9383 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
9385 ? (big_endian
? "elf64ppc" : "elf64lppc")
9386 : (big_endian
? "elf32ppc" : "elf32lppc")))
9390 do_instantiate_target()
9391 { return new Target_powerpc
<size
, big_endian
>(); }
9394 Target_selector_powerpc
<32, true> target_selector_ppc32
;
9395 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
9396 Target_selector_powerpc
<64, true> target_selector_ppc64
;
9397 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
9399 // Instantiate these constants for -O0
9400 template<int size
, bool big_endian
>
9401 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
9402 template<int size
, bool big_endian
>
9403 const typename Output_data_glink
<size
, big_endian
>::Address
9404 Output_data_glink
<size
, big_endian
>::invalid_address
;
9405 template<int size
, bool big_endian
>
9406 const typename Stub_table
<size
, big_endian
>::Address
9407 Stub_table
<size
, big_endian
>::invalid_address
;
9408 template<int size
, bool big_endian
>
9409 const typename Target_powerpc
<size
, big_endian
>::Address
9410 Target_powerpc
<size
, big_endian
>::invalid_address
;
9412 } // End anonymous namespace.