1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2017 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
65 template<int size
, bool big_endian
>
66 class Output_data_save_res
;
68 template<int size
, bool big_endian
>
71 struct Stub_table_owner
74 : output_section(NULL
), owner(NULL
)
77 Output_section
* output_section
;
78 const Output_section::Input_section
* owner
;
82 is_branch_reloc(unsigned int r_type
);
84 // Counter incremented on every Powerpc_relobj constructed.
85 static uint32_t object_id
= 0;
87 template<int size
, bool big_endian
>
88 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
91 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
92 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
93 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
95 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
96 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
97 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
98 uniq_(object_id
++), special_(0), relatoc_(0), toc_(0),
99 has_small_toc_reloc_(false), opd_valid_(false),
100 e_flags_(ehdr
.get_e_flags()), no_toc_opt_(), opd_ent_(),
101 access_from_map_(), has14_(), stub_table_index_(), st_other_()
103 this->set_abiversion(0);
109 // Read the symbols then set up st_other vector.
111 do_read_symbols(Read_symbols_data
*);
113 // Arrange to always relocate .toc first.
115 do_relocate_sections(
116 const Symbol_table
* symtab
, const Layout
* layout
,
117 const unsigned char* pshdrs
, Output_file
* of
,
118 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
);
120 // The .toc section index.
127 // Mark .toc entry at OFF as not optimizable.
129 set_no_toc_opt(Address off
)
131 if (this->no_toc_opt_
.empty())
132 this->no_toc_opt_
.resize(this->section_size(this->toc_shndx())
135 if (off
< this->no_toc_opt_
.size())
136 this->no_toc_opt_
[off
] = true;
139 // Mark the entire .toc as not optimizable.
143 this->no_toc_opt_
.resize(1);
144 this->no_toc_opt_
[0] = true;
147 // Return true if code using the .toc entry at OFF should not be edited.
149 no_toc_opt(Address off
) const
151 if (this->no_toc_opt_
.empty())
154 if (off
>= this->no_toc_opt_
.size())
156 return this->no_toc_opt_
[off
];
159 // The .got2 section shndx.
164 return this->special_
;
169 // The .opd section shndx.
176 return this->special_
;
179 // Init OPD entry arrays.
181 init_opd(size_t opd_size
)
183 size_t count
= this->opd_ent_ndx(opd_size
);
184 this->opd_ent_
.resize(count
);
187 // Return section and offset of function entry for .opd + R_OFF.
189 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
191 size_t ndx
= this->opd_ent_ndx(r_off
);
192 gold_assert(ndx
< this->opd_ent_
.size());
193 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
195 *value
= this->opd_ent_
[ndx
].off
;
196 return this->opd_ent_
[ndx
].shndx
;
199 // Set section and offset of function entry for .opd + R_OFF.
201 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
203 size_t ndx
= this->opd_ent_ndx(r_off
);
204 gold_assert(ndx
< this->opd_ent_
.size());
205 this->opd_ent_
[ndx
].shndx
= shndx
;
206 this->opd_ent_
[ndx
].off
= value
;
209 // Return discard flag for .opd + R_OFF.
211 get_opd_discard(Address r_off
) const
213 size_t ndx
= this->opd_ent_ndx(r_off
);
214 gold_assert(ndx
< this->opd_ent_
.size());
215 return this->opd_ent_
[ndx
].discard
;
218 // Set discard flag for .opd + R_OFF.
220 set_opd_discard(Address r_off
)
222 size_t ndx
= this->opd_ent_ndx(r_off
);
223 gold_assert(ndx
< this->opd_ent_
.size());
224 this->opd_ent_
[ndx
].discard
= true;
229 { return this->opd_valid_
; }
233 { this->opd_valid_
= true; }
235 // Examine .rela.opd to build info about function entry points.
237 scan_opd_relocs(size_t reloc_count
,
238 const unsigned char* prelocs
,
239 const unsigned char* plocal_syms
);
241 // Returns true if a code sequence loading a TOC entry can be
242 // converted into code calculating a TOC pointer relative offset.
244 make_toc_relative(Target_powerpc
<size
, big_endian
>* target
,
247 // Perform the Sized_relobj_file method, then set up opd info from
250 do_read_relocs(Read_relocs_data
*);
253 do_find_special_sections(Read_symbols_data
* sd
);
255 // Adjust this local symbol value. Return false if the symbol
256 // should be discarded from the output file.
258 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
260 if (size
== 64 && this->opd_shndx() != 0)
263 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
265 if (this->get_opd_discard(lv
->input_value()))
273 { return &this->access_from_map_
; }
275 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
276 // section at DST_OFF.
278 add_reference(Relobj
* src_obj
,
279 unsigned int src_indx
,
280 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
282 Section_id
src_id(src_obj
, src_indx
);
283 this->access_from_map_
[dst_off
].insert(src_id
);
286 // Add a reference to the code section specified by the .opd entry
289 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
291 size_t ndx
= this->opd_ent_ndx(dst_off
);
292 if (ndx
>= this->opd_ent_
.size())
293 this->opd_ent_
.resize(ndx
+ 1);
294 this->opd_ent_
[ndx
].gc_mark
= true;
298 process_gc_mark(Symbol_table
* symtab
)
300 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
301 if (this->opd_ent_
[i
].gc_mark
)
303 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
304 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
308 // Return offset in output GOT section that this object will use
309 // as a TOC pointer. Won't be just a constant with multi-toc support.
311 toc_base_offset() const
315 set_has_small_toc_reloc()
316 { has_small_toc_reloc_
= true; }
319 has_small_toc_reloc() const
320 { return has_small_toc_reloc_
; }
323 set_has_14bit_branch(unsigned int shndx
)
325 if (shndx
>= this->has14_
.size())
326 this->has14_
.resize(shndx
+ 1);
327 this->has14_
[shndx
] = true;
331 has_14bit_branch(unsigned int shndx
) const
332 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
335 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
337 if (shndx
>= this->stub_table_index_
.size())
338 this->stub_table_index_
.resize(shndx
+ 1, -1);
339 this->stub_table_index_
[shndx
] = stub_index
;
342 Stub_table
<size
, big_endian
>*
343 stub_table(unsigned int shndx
)
345 if (shndx
< this->stub_table_index_
.size())
347 Target_powerpc
<size
, big_endian
>* target
348 = static_cast<Target_powerpc
<size
, big_endian
>*>(
349 parameters
->sized_target
<size
, big_endian
>());
350 unsigned int indx
= this->stub_table_index_
[shndx
];
351 if (indx
< target
->stub_tables().size())
352 return target
->stub_tables()[indx
];
360 this->stub_table_index_
.clear();
365 { return this->uniq_
; }
369 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
371 // Set ABI version for input and output
373 set_abiversion(int ver
);
376 st_other (unsigned int symndx
) const
378 return this->st_other_
[symndx
];
382 ppc64_local_entry_offset(const Symbol
* sym
) const
383 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
386 ppc64_local_entry_offset(unsigned int symndx
) const
387 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
398 // Return index into opd_ent_ array for .opd entry at OFF.
399 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
400 // apart when the language doesn't use the last 8-byte word, the
401 // environment pointer. Thus dividing the entry section offset by
402 // 16 will give an index into opd_ent_ that works for either layout
403 // of .opd. (It leaves some elements of the vector unused when .opd
404 // entries are spaced 24 bytes apart, but we don't know the spacing
405 // until relocations are processed, and in any case it is possible
406 // for an object to have some entries spaced 16 bytes apart and
407 // others 24 bytes apart.)
409 opd_ent_ndx(size_t off
) const
412 // Per object unique identifier
415 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
416 unsigned int special_
;
418 // For 64-bit the .rela.toc and .toc section shdnx.
419 unsigned int relatoc_
;
422 // For 64-bit, whether this object uses small model relocs to access
424 bool has_small_toc_reloc_
;
426 // Set at the start of gc_process_relocs, when we know opd_ent_
427 // vector is valid. The flag could be made atomic and set in
428 // do_read_relocs with memory_order_release and then tested with
429 // memory_order_acquire, potentially resulting in fewer entries in
434 elfcpp::Elf_Word e_flags_
;
436 // For 64-bit, an array with one entry per 64-bit word in the .toc
437 // section, set if accesses using that word cannot be optimised.
438 std::vector
<bool> no_toc_opt_
;
440 // The first 8-byte word of an OPD entry gives the address of the
441 // entry point of the function. Relocatable object files have a
442 // relocation on this word. The following vector records the
443 // section and offset specified by these relocations.
444 std::vector
<Opd_ent
> opd_ent_
;
446 // References made to this object's .opd section when running
447 // gc_process_relocs for another object, before the opd_ent_ vector
448 // is valid for this object.
449 Access_from access_from_map_
;
451 // Whether input section has a 14-bit branch reloc.
452 std::vector
<bool> has14_
;
454 // The stub table to use for a given input section.
455 std::vector
<unsigned int> stub_table_index_
;
457 // ELF st_other field for local symbols.
458 std::vector
<unsigned char> st_other_
;
461 template<int size
, bool big_endian
>
462 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
465 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
467 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
468 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
469 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
470 opd_shndx_(0), e_flags_(ehdr
.get_e_flags()), opd_ent_()
472 this->set_abiversion(0);
478 // Call Sized_dynobj::do_read_symbols to read the symbols then
479 // read .opd from a dynamic object, filling in opd_ent_ vector,
481 do_read_symbols(Read_symbols_data
*);
483 // The .opd section shndx.
487 return this->opd_shndx_
;
490 // The .opd section address.
494 return this->opd_address_
;
497 // Init OPD entry arrays.
499 init_opd(size_t opd_size
)
501 size_t count
= this->opd_ent_ndx(opd_size
);
502 this->opd_ent_
.resize(count
);
505 // Return section and offset of function entry for .opd + R_OFF.
507 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
509 size_t ndx
= this->opd_ent_ndx(r_off
);
510 gold_assert(ndx
< this->opd_ent_
.size());
511 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
513 *value
= this->opd_ent_
[ndx
].off
;
514 return this->opd_ent_
[ndx
].shndx
;
517 // Set section and offset of function entry for .opd + R_OFF.
519 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
521 size_t ndx
= this->opd_ent_ndx(r_off
);
522 gold_assert(ndx
< this->opd_ent_
.size());
523 this->opd_ent_
[ndx
].shndx
= shndx
;
524 this->opd_ent_
[ndx
].off
= value
;
529 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
531 // Set ABI version for input and output.
533 set_abiversion(int ver
);
536 // Used to specify extent of executable sections.
539 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
540 : start(start_
), len(len_
), shndx(shndx_
)
544 operator<(const Sec_info
& that
) const
545 { return this->start
< that
.start
; }
558 // Return index into opd_ent_ array for .opd entry at OFF.
560 opd_ent_ndx(size_t off
) const
563 // For 64-bit the .opd section shndx and address.
564 unsigned int opd_shndx_
;
565 Address opd_address_
;
568 elfcpp::Elf_Word e_flags_
;
570 // The first 8-byte word of an OPD entry gives the address of the
571 // entry point of the function. Records the section and offset
572 // corresponding to the address. Note that in dynamic objects,
573 // offset is *not* relative to the section.
574 std::vector
<Opd_ent
> opd_ent_
;
577 // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
578 // base class will emit.
580 template<int sh_type
, int size
, bool big_endian
>
581 class Powerpc_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
584 Powerpc_copy_relocs()
585 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_POWERPC_COPY
)
588 // Emit any saved relocations which turn out to be needed. This is
589 // called after all the relocs have been scanned.
591 emit(Output_data_reloc
<sh_type
, true, size
, big_endian
>*);
594 template<int size
, bool big_endian
>
595 class Target_powerpc
: public Sized_target
<size
, big_endian
>
599 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
600 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
601 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
602 typedef Unordered_set
<Symbol_location
, Symbol_location_hash
> Tocsave_loc
;
603 static const Address invalid_address
= static_cast<Address
>(0) - 1;
604 // Offset of tp and dtp pointers from start of TLS block.
605 static const Address tp_offset
= 0x7000;
606 static const Address dtp_offset
= 0x8000;
609 : Sized_target
<size
, big_endian
>(&powerpc_info
),
610 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
611 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(),
612 tlsld_got_offset_(-1U),
613 stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(),
614 plt_thread_safe_(false), plt_localentry0_(false),
615 plt_localentry0_init_(false), has_localentry0_(false),
616 relax_failed_(false), relax_fail_count_(0),
617 stub_group_size_(0), savres_section_(0)
621 // Process the relocations to determine unreferenced sections for
622 // garbage collection.
624 gc_process_relocs(Symbol_table
* symtab
,
626 Sized_relobj_file
<size
, big_endian
>* object
,
627 unsigned int data_shndx
,
628 unsigned int sh_type
,
629 const unsigned char* prelocs
,
631 Output_section
* output_section
,
632 bool needs_special_offset_handling
,
633 size_t local_symbol_count
,
634 const unsigned char* plocal_symbols
);
636 // Scan the relocations to look for symbol adjustments.
638 scan_relocs(Symbol_table
* symtab
,
640 Sized_relobj_file
<size
, big_endian
>* object
,
641 unsigned int data_shndx
,
642 unsigned int sh_type
,
643 const unsigned char* prelocs
,
645 Output_section
* output_section
,
646 bool needs_special_offset_handling
,
647 size_t local_symbol_count
,
648 const unsigned char* plocal_symbols
);
650 // Map input .toc section to output .got section.
652 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
654 if (size
== 64 && strcmp(name
, ".toc") == 0)
662 // Provide linker defined save/restore functions.
664 define_save_restore_funcs(Layout
*, Symbol_table
*);
666 // No stubs unless a final link.
669 { return !parameters
->options().relocatable(); }
672 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
675 do_plt_fde_location(const Output_data
*, unsigned char*,
676 uint64_t*, off_t
*) const;
678 // Stash info about branches, for stub generation.
680 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
681 unsigned int data_shndx
, Address r_offset
,
682 unsigned int r_type
, unsigned int r_sym
, Address addend
)
684 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
685 this->branch_info_
.push_back(info
);
686 if (r_type
== elfcpp::R_POWERPC_REL14
687 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
688 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
689 ppc_object
->set_has_14bit_branch(data_shndx
);
692 // Return whether the last branch is a plt call, and if so, mark the
693 // branch as having an R_PPC64_TOCSAVE.
695 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
696 unsigned int data_shndx
, Address r_offset
, Symbol_table
* symtab
)
699 && !this->branch_info_
.empty()
700 && this->branch_info_
.back().mark_pltcall(ppc_object
, data_shndx
,
701 r_offset
, this, symtab
));
704 // Say the given location, that of a nop in a function prologue with
705 // an R_PPC64_TOCSAVE reloc, will be used to save r2.
706 // R_PPC64_TOCSAVE relocs on nops following calls point at this nop.
708 add_tocsave(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
709 unsigned int shndx
, Address offset
)
712 loc
.object
= ppc_object
;
715 this->tocsave_loc_
.insert(loc
);
722 return this->tocsave_loc_
;
726 do_define_standard_symbols(Symbol_table
*, Layout
*);
728 // Finalize the sections.
730 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
732 // Return the value to use for a dynamic which requires special
735 do_dynsym_value(const Symbol
*) const;
737 // Return the PLT address to use for a local symbol.
739 do_plt_address_for_local(const Relobj
*, unsigned int) const;
741 // Return the PLT address to use for a global symbol.
743 do_plt_address_for_global(const Symbol
*) const;
745 // Return the offset to use for the GOT_INDX'th got entry which is
746 // for a local tls symbol specified by OBJECT, SYMNDX.
748 do_tls_offset_for_local(const Relobj
* object
,
750 unsigned int got_indx
) const;
752 // Return the offset to use for the GOT_INDX'th got entry which is
753 // for global tls symbol GSYM.
755 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
758 do_function_location(Symbol_location
*) const;
761 do_can_check_for_function_pointers() const
764 // Adjust -fsplit-stack code which calls non-split-stack code.
766 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
767 section_offset_type fnoffset
, section_size_type fnsize
,
768 const unsigned char* prelocs
, size_t reloc_count
,
769 unsigned char* view
, section_size_type view_size
,
770 std::string
* from
, std::string
* to
) const;
772 // Relocate a section.
774 relocate_section(const Relocate_info
<size
, big_endian
>*,
775 unsigned int sh_type
,
776 const unsigned char* prelocs
,
778 Output_section
* output_section
,
779 bool needs_special_offset_handling
,
781 Address view_address
,
782 section_size_type view_size
,
783 const Reloc_symbol_changes
*);
785 // Scan the relocs during a relocatable link.
787 scan_relocatable_relocs(Symbol_table
* symtab
,
789 Sized_relobj_file
<size
, big_endian
>* object
,
790 unsigned int data_shndx
,
791 unsigned int sh_type
,
792 const unsigned char* prelocs
,
794 Output_section
* output_section
,
795 bool needs_special_offset_handling
,
796 size_t local_symbol_count
,
797 const unsigned char* plocal_symbols
,
798 Relocatable_relocs
*);
800 // Scan the relocs for --emit-relocs.
802 emit_relocs_scan(Symbol_table
* symtab
,
804 Sized_relobj_file
<size
, big_endian
>* object
,
805 unsigned int data_shndx
,
806 unsigned int sh_type
,
807 const unsigned char* prelocs
,
809 Output_section
* output_section
,
810 bool needs_special_offset_handling
,
811 size_t local_symbol_count
,
812 const unsigned char* plocal_syms
,
813 Relocatable_relocs
* rr
);
815 // Emit relocations for a section.
817 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
818 unsigned int sh_type
,
819 const unsigned char* prelocs
,
821 Output_section
* output_section
,
822 typename
elfcpp::Elf_types
<size
>::Elf_Off
823 offset_in_output_section
,
825 Address view_address
,
827 unsigned char* reloc_view
,
828 section_size_type reloc_view_size
);
830 // Return whether SYM is defined by the ABI.
832 do_is_defined_by_abi(const Symbol
* sym
) const
834 return strcmp(sym
->name(), "__tls_get_addr") == 0;
837 // Return the size of the GOT section.
841 gold_assert(this->got_
!= NULL
);
842 return this->got_
->data_size();
845 // Get the PLT section.
846 const Output_data_plt_powerpc
<size
, big_endian
>*
849 gold_assert(this->plt_
!= NULL
);
853 // Get the IPLT section.
854 const Output_data_plt_powerpc
<size
, big_endian
>*
857 gold_assert(this->iplt_
!= NULL
);
861 // Get the .glink section.
862 const Output_data_glink
<size
, big_endian
>*
863 glink_section() const
865 gold_assert(this->glink_
!= NULL
);
869 Output_data_glink
<size
, big_endian
>*
872 gold_assert(this->glink_
!= NULL
);
876 bool has_glink() const
877 { return this->glink_
!= NULL
; }
879 // Get the GOT section.
880 const Output_data_got_powerpc
<size
, big_endian
>*
883 gold_assert(this->got_
!= NULL
);
887 // Get the GOT section, creating it if necessary.
888 Output_data_got_powerpc
<size
, big_endian
>*
889 got_section(Symbol_table
*, Layout
*);
892 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
893 const elfcpp::Ehdr
<size
, big_endian
>&);
895 // Return the number of entries in the GOT.
897 got_entry_count() const
899 if (this->got_
== NULL
)
901 return this->got_size() / (size
/ 8);
904 // Return the number of entries in the PLT.
906 plt_entry_count() const;
908 // Return the offset of the first non-reserved PLT entry.
910 first_plt_entry_offset() const
914 if (this->abiversion() >= 2)
919 // Return the size of each PLT entry.
921 plt_entry_size() const
925 if (this->abiversion() >= 2)
930 Output_data_save_res
<size
, big_endian
>*
931 savres_section() const
933 return this->savres_section_
;
936 // Add any special sections for this symbol to the gc work list.
937 // For powerpc64, this adds the code section of a function
940 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
942 // Handle target specific gc actions when adding a gc reference from
943 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
944 // and DST_OFF. For powerpc64, this adds a referenc to the code
945 // section of a function descriptor.
947 do_gc_add_reference(Symbol_table
* symtab
,
949 unsigned int src_shndx
,
951 unsigned int dst_shndx
,
952 Address dst_off
) const;
954 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
957 { return this->stub_tables_
; }
959 const Output_data_brlt_powerpc
<size
, big_endian
>*
961 { return this->brlt_section_
; }
964 add_branch_lookup_table(Address to
)
966 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
967 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
971 find_branch_lookup_table(Address to
)
973 typename
Branch_lookup_table::const_iterator p
974 = this->branch_lookup_table_
.find(to
);
975 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
979 write_branch_lookup_table(unsigned char *oview
)
981 for (typename
Branch_lookup_table::const_iterator p
982 = this->branch_lookup_table_
.begin();
983 p
!= this->branch_lookup_table_
.end();
986 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
990 // Wrapper used after relax to define a local symbol in output data,
991 // from the end if value < 0.
993 define_local(Symbol_table
* symtab
, const char* name
,
994 Output_data
* od
, Address value
, unsigned int symsize
)
997 = symtab
->define_in_output_data(name
, NULL
, Symbol_table::PREDEFINED
,
998 od
, value
, symsize
, elfcpp::STT_NOTYPE
,
999 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
, 0,
1000 static_cast<Signed_address
>(value
) < 0,
1002 // We are creating this symbol late, so need to fix up things
1003 // done early in Layout::finalize.
1004 sym
->set_dynsym_index(-1U);
1008 plt_thread_safe() const
1009 { return this->plt_thread_safe_
; }
1012 plt_localentry0() const
1013 { return this->plt_localentry0_
; }
1016 set_has_localentry0()
1018 this->has_localentry0_
= true;
1022 is_elfv2_localentry0(const Symbol
* gsym
) const
1025 && this->abiversion() >= 2
1026 && this->plt_localentry0()
1027 && gsym
->type() == elfcpp::STT_FUNC
1028 && gsym
->is_defined()
1029 && gsym
->nonvis() >> 3 == 0);
1033 is_elfv2_localentry0(const Sized_relobj_file
<size
, big_endian
>* object
,
1034 unsigned int r_sym
) const
1036 const Powerpc_relobj
<size
, big_endian
>* ppc_object
1037 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
1040 && this->abiversion() >= 2
1041 && this->plt_localentry0()
1042 && ppc_object
->st_other(r_sym
) >> 5 == 0)
1044 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
1046 if (!psymval
->is_ifunc_symbol()
1047 && psymval
->input_shndx(&is_ordinary
) != elfcpp::SHN_UNDEF
1056 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
1059 set_abiversion (int ver
)
1061 elfcpp::Elf_Word flags
= this->processor_specific_flags();
1062 flags
&= ~elfcpp::EF_PPC64_ABI
;
1063 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
1064 this->set_processor_specific_flags(flags
);
1067 // Offset to save stack slot
1070 { return this->abiversion() < 2 ? 40 : 24; }
1086 : tls_get_addr_(NOT_EXPECTED
),
1087 relinfo_(NULL
), relnum_(0), r_offset_(0)
1092 if (this->tls_get_addr_
!= NOT_EXPECTED
)
1099 if (this->relinfo_
!= NULL
)
1100 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
1101 _("missing expected __tls_get_addr call"));
1105 expect_tls_get_addr_call(
1106 const Relocate_info
<size
, big_endian
>* relinfo
,
1110 this->tls_get_addr_
= EXPECTED
;
1111 this->relinfo_
= relinfo
;
1112 this->relnum_
= relnum
;
1113 this->r_offset_
= r_offset
;
1117 expect_tls_get_addr_call()
1118 { this->tls_get_addr_
= EXPECTED
; }
1121 skip_next_tls_get_addr_call()
1122 {this->tls_get_addr_
= SKIP
; }
1125 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
1127 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
1128 || r_type
== elfcpp::R_PPC_PLTREL24
)
1130 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
1131 Tls_get_addr last_tls
= this->tls_get_addr_
;
1132 this->tls_get_addr_
= NOT_EXPECTED
;
1133 if (is_tls_call
&& last_tls
!= EXPECTED
)
1135 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
1144 // What we're up to regarding calls to __tls_get_addr.
1145 // On powerpc, the branch and link insn making a call to
1146 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1147 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1148 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1149 // The marker relocation always comes first, and has the same
1150 // symbol as the reloc on the insn setting up the __tls_get_addr
1151 // argument. This ties the arg setup insn with the call insn,
1152 // allowing ld to safely optimize away the call. We check that
1153 // every call to __tls_get_addr has a marker relocation, and that
1154 // every marker relocation is on a call to __tls_get_addr.
1155 Tls_get_addr tls_get_addr_
;
1156 // Info about the last reloc for error message.
1157 const Relocate_info
<size
, big_endian
>* relinfo_
;
1162 // The class which scans relocations.
1163 class Scan
: protected Track_tls
1166 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1169 : Track_tls(), issued_non_pic_error_(false)
1173 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
1176 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1177 Sized_relobj_file
<size
, big_endian
>* object
,
1178 unsigned int data_shndx
,
1179 Output_section
* output_section
,
1180 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1181 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1185 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1186 Sized_relobj_file
<size
, big_endian
>* object
,
1187 unsigned int data_shndx
,
1188 Output_section
* output_section
,
1189 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1193 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1195 Sized_relobj_file
<size
, big_endian
>* relobj
,
1198 const elfcpp::Rela
<size
, big_endian
>& ,
1199 unsigned int r_type
,
1200 const elfcpp::Sym
<size
, big_endian
>&)
1202 // PowerPC64 .opd is not folded, so any identical function text
1203 // may be folded and we'll still keep function addresses distinct.
1204 // That means no reloc is of concern here.
1207 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1208 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1209 if (ppcobj
->abiversion() == 1)
1212 // For 32-bit and ELFv2, conservatively assume anything but calls to
1213 // function code might be taking the address of the function.
1214 return !is_branch_reloc(r_type
);
1218 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1220 Sized_relobj_file
<size
, big_endian
>* relobj
,
1223 const elfcpp::Rela
<size
, big_endian
>& ,
1224 unsigned int r_type
,
1230 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1231 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1232 if (ppcobj
->abiversion() == 1)
1235 return !is_branch_reloc(r_type
);
1239 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1240 Sized_relobj_file
<size
, big_endian
>* object
,
1241 unsigned int r_type
, bool report_err
);
1245 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1246 unsigned int r_type
);
1249 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1250 unsigned int r_type
, Symbol
*);
1253 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1254 Target_powerpc
* target
);
1257 check_non_pic(Relobj
*, unsigned int r_type
);
1259 // Whether we have issued an error about a non-PIC compilation.
1260 bool issued_non_pic_error_
;
1264 symval_for_branch(const Symbol_table
* symtab
,
1265 const Sized_symbol
<size
>* gsym
,
1266 Powerpc_relobj
<size
, big_endian
>* object
,
1267 Address
*value
, unsigned int *dest_shndx
);
1269 // The class which implements relocation.
1270 class Relocate
: protected Track_tls
1273 // Use 'at' branch hints when true, 'y' when false.
1274 // FIXME maybe: set this with an option.
1275 static const bool is_isa_v2
= true;
1281 // Do a relocation. Return false if the caller should not issue
1282 // any warnings about this relocation.
1284 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1285 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1286 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1287 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1291 class Relocate_comdat_behavior
1294 // Decide what the linker should do for relocations that refer to
1295 // discarded comdat sections.
1296 inline Comdat_behavior
1297 get(const char* name
)
1299 gold::Default_comdat_behavior default_behavior
;
1300 Comdat_behavior ret
= default_behavior
.get(name
);
1301 if (ret
== CB_WARNING
)
1304 && (strcmp(name
, ".fixup") == 0
1305 || strcmp(name
, ".got2") == 0))
1308 && (strcmp(name
, ".opd") == 0
1309 || strcmp(name
, ".toc") == 0
1310 || strcmp(name
, ".toc1") == 0))
1317 // Optimize the TLS relocation type based on what we know about the
1318 // symbol. IS_FINAL is true if the final address of this symbol is
1319 // known at link time.
1321 tls::Tls_optimization
1322 optimize_tls_gd(bool is_final
)
1324 // If we are generating a shared library, then we can't do anything
1326 if (parameters
->options().shared())
1327 return tls::TLSOPT_NONE
;
1330 return tls::TLSOPT_TO_IE
;
1331 return tls::TLSOPT_TO_LE
;
1334 tls::Tls_optimization
1337 if (parameters
->options().shared())
1338 return tls::TLSOPT_NONE
;
1340 return tls::TLSOPT_TO_LE
;
1343 tls::Tls_optimization
1344 optimize_tls_ie(bool is_final
)
1346 if (!is_final
|| parameters
->options().shared())
1347 return tls::TLSOPT_NONE
;
1349 return tls::TLSOPT_TO_LE
;
1354 make_glink_section(Layout
*);
1356 // Create the PLT section.
1358 make_plt_section(Symbol_table
*, Layout
*);
1361 make_iplt_section(Symbol_table
*, Layout
*);
1364 make_brlt_section(Layout
*);
1366 // Create a PLT entry for a global symbol.
1368 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1370 // Create a PLT entry for a local IFUNC symbol.
1372 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1373 Sized_relobj_file
<size
, big_endian
>*,
1377 // Create a GOT entry for local dynamic __tls_get_addr.
1379 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1380 Sized_relobj_file
<size
, big_endian
>* object
);
1383 tlsld_got_offset() const
1385 return this->tlsld_got_offset_
;
1388 // Get the dynamic reloc section, creating it if necessary.
1390 rela_dyn_section(Layout
*);
1392 // Similarly, but for ifunc symbols get the one for ifunc.
1394 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1396 // Copy a relocation against a global symbol.
1398 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1399 Sized_relobj_file
<size
, big_endian
>* object
,
1400 unsigned int shndx
, Output_section
* output_section
,
1401 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1403 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1404 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1405 symtab
->get_sized_symbol
<size
>(sym
),
1406 object
, shndx
, output_section
,
1407 r_type
, reloc
.get_r_offset(),
1408 reloc
.get_r_addend(),
1409 this->rela_dyn_section(layout
));
1412 // Look over all the input sections, deciding where to place stubs.
1414 group_sections(Layout
*, const Task
*, bool);
1416 // Sort output sections by address.
1417 struct Sort_sections
1420 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1421 { return sec1
->address() < sec2
->address(); }
1427 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1428 unsigned int data_shndx
,
1430 unsigned int r_type
,
1433 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1434 r_type_(r_type
), tocsave_ (0), r_sym_(r_sym
), addend_(addend
)
1440 // Return whether this branch is going via a plt call stub, and if
1441 // so, mark it as having an R_PPC64_TOCSAVE.
1443 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1444 unsigned int shndx
, Address offset
,
1445 Target_powerpc
* target
, Symbol_table
* symtab
);
1447 // If this branch needs a plt call stub, or a long branch stub, make one.
1449 make_stub(Stub_table
<size
, big_endian
>*,
1450 Stub_table
<size
, big_endian
>*,
1451 Symbol_table
*) const;
1454 // The branch location..
1455 Powerpc_relobj
<size
, big_endian
>* object_
;
1456 unsigned int shndx_
;
1458 // ..and the branch type and destination.
1459 unsigned int r_type_
: 31;
1460 unsigned int tocsave_
: 1;
1461 unsigned int r_sym_
;
1465 // Information about this specific target which we pass to the
1466 // general Target structure.
1467 static Target::Target_info powerpc_info
;
1469 // The types of GOT entries needed for this platform.
1470 // These values are exposed to the ABI in an incremental link.
1471 // Do not renumber existing values without changing the version
1472 // number of the .gnu_incremental_inputs section.
1476 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1477 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1478 GOT_TYPE_TPREL
// entry for @got@tprel
1482 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1483 // The PLT section. This is a container for a table of addresses,
1484 // and their relocations. Each address in the PLT has a dynamic
1485 // relocation (R_*_JMP_SLOT) and each address will have a
1486 // corresponding entry in .glink for lazy resolution of the PLT.
1487 // ppc32 initialises the PLT to point at the .glink entry, while
1488 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1489 // linker adds a stub that loads the PLT entry into ctr then
1490 // branches to ctr. There may be more than one stub for each PLT
1491 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1492 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1493 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1494 // The IPLT section. Like plt_, this is a container for a table of
1495 // addresses and their relocations, specifically for STT_GNU_IFUNC
1496 // functions that resolve locally (STT_GNU_IFUNC functions that
1497 // don't resolve locally go in PLT). Unlike plt_, these have no
1498 // entry in .glink for lazy resolution, and the relocation section
1499 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1500 // the relocation section may contain relocations against
1501 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1502 // relocation section will appear at the end of other dynamic
1503 // relocations, so that ld.so applies these relocations after other
1504 // dynamic relocations. In a static executable, the relocation
1505 // section is emitted and marked with __rela_iplt_start and
1506 // __rela_iplt_end symbols.
1507 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1508 // Section holding long branch destinations.
1509 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1510 // The .glink section.
1511 Output_data_glink
<size
, big_endian
>* glink_
;
1512 // The dynamic reloc section.
1513 Reloc_section
* rela_dyn_
;
1514 // Relocs saved to avoid a COPY reloc.
1515 Powerpc_copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1516 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1517 unsigned int tlsld_got_offset_
;
1519 Stub_tables stub_tables_
;
1520 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1521 Branch_lookup_table branch_lookup_table_
;
1523 typedef std::vector
<Branch_info
> Branches
;
1524 Branches branch_info_
;
1525 Tocsave_loc tocsave_loc_
;
1527 bool plt_thread_safe_
;
1528 bool plt_localentry0_
;
1529 bool plt_localentry0_init_
;
1530 bool has_localentry0_
;
1533 int relax_fail_count_
;
1534 int32_t stub_group_size_
;
1536 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1540 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1543 true, // is_big_endian
1544 elfcpp::EM_PPC
, // machine_code
1545 false, // has_make_symbol
1546 false, // has_resolve
1547 false, // has_code_fill
1548 true, // is_default_stack_executable
1549 false, // can_icf_inline_merge_sections
1551 "/usr/lib/ld.so.1", // dynamic_linker
1552 0x10000000, // default_text_segment_address
1553 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1554 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1555 false, // isolate_execinstr
1557 elfcpp::SHN_UNDEF
, // small_common_shndx
1558 elfcpp::SHN_UNDEF
, // large_common_shndx
1559 0, // small_common_section_flags
1560 0, // large_common_section_flags
1561 NULL
, // attributes_section
1562 NULL
, // attributes_vendor
1563 "_start", // entry_symbol_name
1564 32, // hash_entry_size
1568 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1571 false, // is_big_endian
1572 elfcpp::EM_PPC
, // machine_code
1573 false, // has_make_symbol
1574 false, // has_resolve
1575 false, // has_code_fill
1576 true, // is_default_stack_executable
1577 false, // can_icf_inline_merge_sections
1579 "/usr/lib/ld.so.1", // dynamic_linker
1580 0x10000000, // default_text_segment_address
1581 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1582 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1583 false, // isolate_execinstr
1585 elfcpp::SHN_UNDEF
, // small_common_shndx
1586 elfcpp::SHN_UNDEF
, // large_common_shndx
1587 0, // small_common_section_flags
1588 0, // large_common_section_flags
1589 NULL
, // attributes_section
1590 NULL
, // attributes_vendor
1591 "_start", // entry_symbol_name
1592 32, // hash_entry_size
1596 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1599 true, // is_big_endian
1600 elfcpp::EM_PPC64
, // machine_code
1601 false, // has_make_symbol
1602 false, // has_resolve
1603 false, // has_code_fill
1604 true, // is_default_stack_executable
1605 false, // can_icf_inline_merge_sections
1607 "/usr/lib/ld.so.1", // dynamic_linker
1608 0x10000000, // default_text_segment_address
1609 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1610 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1611 false, // isolate_execinstr
1613 elfcpp::SHN_UNDEF
, // small_common_shndx
1614 elfcpp::SHN_UNDEF
, // large_common_shndx
1615 0, // small_common_section_flags
1616 0, // large_common_section_flags
1617 NULL
, // attributes_section
1618 NULL
, // attributes_vendor
1619 "_start", // entry_symbol_name
1620 32, // hash_entry_size
1624 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1627 false, // is_big_endian
1628 elfcpp::EM_PPC64
, // machine_code
1629 false, // has_make_symbol
1630 false, // has_resolve
1631 false, // has_code_fill
1632 true, // is_default_stack_executable
1633 false, // can_icf_inline_merge_sections
1635 "/usr/lib/ld.so.1", // dynamic_linker
1636 0x10000000, // default_text_segment_address
1637 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1638 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1639 false, // isolate_execinstr
1641 elfcpp::SHN_UNDEF
, // small_common_shndx
1642 elfcpp::SHN_UNDEF
, // large_common_shndx
1643 0, // small_common_section_flags
1644 0, // large_common_section_flags
1645 NULL
, // attributes_section
1646 NULL
, // attributes_vendor
1647 "_start", // entry_symbol_name
1648 32, // hash_entry_size
1652 is_branch_reloc(unsigned int r_type
)
1654 return (r_type
== elfcpp::R_POWERPC_REL24
1655 || r_type
== elfcpp::R_PPC_PLTREL24
1656 || r_type
== elfcpp::R_PPC_LOCAL24PC
1657 || r_type
== elfcpp::R_POWERPC_REL14
1658 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1659 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1660 || r_type
== elfcpp::R_POWERPC_ADDR24
1661 || r_type
== elfcpp::R_POWERPC_ADDR14
1662 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1663 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1666 // If INSN is an opcode that may be used with an @tls operand, return
1667 // the transformed insn for TLS optimisation, otherwise return 0. If
1668 // REG is non-zero only match an insn with RB or RA equal to REG.
1670 at_tls_transform(uint32_t insn
, unsigned int reg
)
1672 if ((insn
& (0x3f << 26)) != 31 << 26)
1676 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1677 rtra
= insn
& ((1 << 26) - (1 << 16));
1678 else if (((insn
>> 16) & 0x1f) == reg
)
1679 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1683 if ((insn
& (0x3ff << 1)) == 266 << 1)
1686 else if ((insn
& (0x1f << 1)) == 23 << 1
1687 && ((insn
& (0x1f << 6)) < 14 << 6
1688 || ((insn
& (0x1f << 6)) >= 16 << 6
1689 && (insn
& (0x1f << 6)) < 24 << 6)))
1690 // load and store indexed -> dform
1691 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1692 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1693 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1694 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1695 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1697 insn
= (58 << 26) | 2;
1705 template<int size
, bool big_endian
>
1706 class Powerpc_relocate_functions
1726 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1727 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1728 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1730 template<int valsize
>
1732 has_overflow_signed(Address value
)
1734 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1735 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1736 limit
<<= ((valsize
- 1) >> 1);
1737 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1738 return value
+ limit
> (limit
<< 1) - 1;
1741 template<int valsize
>
1743 has_overflow_unsigned(Address value
)
1745 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1746 limit
<<= ((valsize
- 1) >> 1);
1747 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1748 return value
> (limit
<< 1) - 1;
1751 template<int valsize
>
1753 has_overflow_bitfield(Address value
)
1755 return (has_overflow_unsigned
<valsize
>(value
)
1756 && has_overflow_signed
<valsize
>(value
));
1759 template<int valsize
>
1760 static inline Status
1761 overflowed(Address value
, Overflow_check overflow
)
1763 if (overflow
== CHECK_SIGNED
)
1765 if (has_overflow_signed
<valsize
>(value
))
1766 return STATUS_OVERFLOW
;
1768 else if (overflow
== CHECK_UNSIGNED
)
1770 if (has_overflow_unsigned
<valsize
>(value
))
1771 return STATUS_OVERFLOW
;
1773 else if (overflow
== CHECK_BITFIELD
)
1775 if (has_overflow_bitfield
<valsize
>(value
))
1776 return STATUS_OVERFLOW
;
1781 // Do a simple RELA relocation
1782 template<int fieldsize
, int valsize
>
1783 static inline Status
1784 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1786 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1787 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1788 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1789 return overflowed
<valsize
>(value
, overflow
);
1792 template<int fieldsize
, int valsize
>
1793 static inline Status
1794 rela(unsigned char* view
,
1795 unsigned int right_shift
,
1796 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1798 Overflow_check overflow
)
1800 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1801 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1802 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1803 Valtype reloc
= value
>> right_shift
;
1806 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1807 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1810 // Do a simple RELA relocation, unaligned.
1811 template<int fieldsize
, int valsize
>
1812 static inline Status
1813 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1815 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1816 return overflowed
<valsize
>(value
, overflow
);
1819 template<int fieldsize
, int valsize
>
1820 static inline Status
1821 rela_ua(unsigned char* view
,
1822 unsigned int right_shift
,
1823 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1825 Overflow_check overflow
)
1827 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1829 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1830 Valtype reloc
= value
>> right_shift
;
1833 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1834 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1838 // R_PPC64_ADDR64: (Symbol + Addend)
1840 addr64(unsigned char* view
, Address value
)
1841 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1843 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1845 addr64_u(unsigned char* view
, Address value
)
1846 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1848 // R_POWERPC_ADDR32: (Symbol + Addend)
1849 static inline Status
1850 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1851 { return This::template rela
<32,32>(view
, value
, overflow
); }
1853 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1854 static inline Status
1855 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1856 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1858 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1859 static inline Status
1860 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1862 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1864 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1865 stat
= STATUS_OVERFLOW
;
1869 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1870 static inline Status
1871 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1872 { return This::template rela
<16,16>(view
, value
, overflow
); }
1874 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1875 static inline Status
1876 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1877 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1879 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1880 static inline Status
1881 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1883 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1884 if ((value
& 3) != 0)
1885 stat
= STATUS_OVERFLOW
;
1889 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1890 static inline Status
1891 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1893 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1894 if ((value
& 15) != 0)
1895 stat
= STATUS_OVERFLOW
;
1899 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1901 addr16_hi(unsigned char* view
, Address value
)
1902 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1904 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1906 addr16_ha(unsigned char* view
, Address value
)
1907 { This::addr16_hi(view
, value
+ 0x8000); }
1909 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1911 addr16_hi2(unsigned char* view
, Address value
)
1912 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1914 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1916 addr16_ha2(unsigned char* view
, Address value
)
1917 { This::addr16_hi2(view
, value
+ 0x8000); }
1919 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1921 addr16_hi3(unsigned char* view
, Address value
)
1922 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1924 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1926 addr16_ha3(unsigned char* view
, Address value
)
1927 { This::addr16_hi3(view
, value
+ 0x8000); }
1929 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1930 static inline Status
1931 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1933 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1934 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1935 stat
= STATUS_OVERFLOW
;
1939 // R_POWERPC_REL16DX_HA
1940 static inline Status
1941 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
1943 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
1944 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1945 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
1947 value
= static_cast<SignedAddress
>(value
) >> 16;
1948 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
1949 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
1950 return overflowed
<16>(value
, overflow
);
1954 // Set ABI version for input and output.
1956 template<int size
, bool big_endian
>
1958 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1960 this->e_flags_
|= ver
;
1961 if (this->abiversion() != 0)
1963 Target_powerpc
<size
, big_endian
>* target
=
1964 static_cast<Target_powerpc
<size
, big_endian
>*>(
1965 parameters
->sized_target
<size
, big_endian
>());
1966 if (target
->abiversion() == 0)
1967 target
->set_abiversion(this->abiversion());
1968 else if (target
->abiversion() != this->abiversion())
1969 gold_error(_("%s: ABI version %d is not compatible "
1970 "with ABI version %d output"),
1971 this->name().c_str(),
1972 this->abiversion(), target
->abiversion());
1977 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
1978 // relocatable object, if such sections exists.
1980 template<int size
, bool big_endian
>
1982 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1983 Read_symbols_data
* sd
)
1985 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1986 const unsigned char* namesu
= sd
->section_names
->data();
1987 const char* names
= reinterpret_cast<const char*>(namesu
);
1988 section_size_type names_size
= sd
->section_names_size
;
1989 const unsigned char* s
;
1991 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1992 size
== 32 ? ".got2" : ".opd",
1993 names
, names_size
, NULL
);
1996 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1997 this->special_
= ndx
;
2000 if (this->abiversion() == 0)
2001 this->set_abiversion(1);
2002 else if (this->abiversion() > 1)
2003 gold_error(_("%s: .opd invalid in abiv%d"),
2004 this->name().c_str(), this->abiversion());
2009 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
2010 names
, names_size
, NULL
);
2013 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2014 this->relatoc_
= ndx
;
2015 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2016 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
2019 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
2022 // Examine .rela.opd to build info about function entry points.
2024 template<int size
, bool big_endian
>
2026 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
2028 const unsigned char* prelocs
,
2029 const unsigned char* plocal_syms
)
2033 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
2034 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
2035 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2036 Address expected_off
= 0;
2037 bool regular
= true;
2038 unsigned int opd_ent_size
= 0;
2040 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2042 Reltype
reloc(prelocs
);
2043 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
2044 = reloc
.get_r_info();
2045 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2046 if (r_type
== elfcpp::R_PPC64_ADDR64
)
2048 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2049 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
2052 if (r_sym
< this->local_symbol_count())
2054 typename
elfcpp::Sym
<size
, big_endian
>
2055 lsym(plocal_syms
+ r_sym
* sym_size
);
2056 shndx
= lsym
.get_st_shndx();
2057 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2058 value
= lsym
.get_st_value();
2061 shndx
= this->symbol_section_and_value(r_sym
, &value
,
2063 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
2064 value
+ reloc
.get_r_addend());
2067 expected_off
= reloc
.get_r_offset();
2068 opd_ent_size
= expected_off
;
2070 else if (expected_off
!= reloc
.get_r_offset())
2072 expected_off
+= opd_ent_size
;
2074 else if (r_type
== elfcpp::R_PPC64_TOC
)
2076 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
2081 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2082 this->name().c_str(), r_type
);
2086 if (reloc_count
<= 2)
2087 opd_ent_size
= this->section_size(this->opd_shndx());
2088 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
2092 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2093 this->name().c_str());
2099 // Returns true if a code sequence loading the TOC entry at VALUE
2100 // relative to the TOC pointer can be converted into code calculating
2101 // a TOC pointer relative offset.
2102 // If so, the TOC pointer relative offset is stored to VALUE.
2104 template<int size
, bool big_endian
>
2106 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
2107 Target_powerpc
<size
, big_endian
>* target
,
2113 // With -mcmodel=medium code it is quite possible to have
2114 // toc-relative relocs referring to objects outside the TOC.
2115 // Don't try to look at a non-existent TOC.
2116 if (this->toc_shndx() == 0)
2119 // Convert VALUE back to an address by adding got_base (see below),
2120 // then to an offset in the TOC by subtracting the TOC output
2121 // section address and the TOC output offset. Since this TOC output
2122 // section and the got output section are one and the same, we can
2123 // omit adding and subtracting the output section address.
2124 Address off
= (*value
+ this->toc_base_offset()
2125 - this->output_section_offset(this->toc_shndx()));
2126 // Is this offset in the TOC? -mcmodel=medium code may be using
2127 // TOC relative access to variables outside the TOC. Those of
2128 // course can't be optimized. We also don't try to optimize code
2129 // that is using a different object's TOC.
2130 if (off
>= this->section_size(this->toc_shndx()))
2133 if (this->no_toc_opt(off
))
2136 section_size_type vlen
;
2137 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2138 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2140 Address got_base
= (target
->got_section()->output_section()->address()
2141 + this->toc_base_offset());
2143 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2150 // Perform the Sized_relobj_file method, then set up opd info from
2153 template<int size
, bool big_endian
>
2155 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2157 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2160 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2161 p
!= rd
->relocs
.end();
2164 if (p
->data_shndx
== this->opd_shndx())
2166 uint64_t opd_size
= this->section_size(this->opd_shndx());
2167 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2170 this->init_opd(opd_size
);
2171 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2172 rd
->local_symbols
->data());
2180 // Read the symbols then set up st_other vector.
2182 template<int size
, bool big_endian
>
2184 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2186 this->base_read_symbols(sd
);
2189 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2190 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2191 const unsigned int loccount
= this->do_local_symbol_count();
2194 this->st_other_
.resize(loccount
);
2195 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2196 off_t locsize
= loccount
* sym_size
;
2197 const unsigned int symtab_shndx
= this->symtab_shndx();
2198 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2199 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2200 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2201 locsize
, true, false);
2203 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2205 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2206 unsigned char st_other
= sym
.get_st_other();
2207 this->st_other_
[i
] = st_other
;
2208 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2210 if (this->abiversion() == 0)
2211 this->set_abiversion(2);
2212 else if (this->abiversion() < 2)
2213 gold_error(_("%s: local symbol %d has invalid st_other"
2214 " for ABI version 1"),
2215 this->name().c_str(), i
);
2222 template<int size
, bool big_endian
>
2224 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2226 this->e_flags_
|= ver
;
2227 if (this->abiversion() != 0)
2229 Target_powerpc
<size
, big_endian
>* target
=
2230 static_cast<Target_powerpc
<size
, big_endian
>*>(
2231 parameters
->sized_target
<size
, big_endian
>());
2232 if (target
->abiversion() == 0)
2233 target
->set_abiversion(this->abiversion());
2234 else if (target
->abiversion() != this->abiversion())
2235 gold_error(_("%s: ABI version %d is not compatible "
2236 "with ABI version %d output"),
2237 this->name().c_str(),
2238 this->abiversion(), target
->abiversion());
2243 // Call Sized_dynobj::base_read_symbols to read the symbols then
2244 // read .opd from a dynamic object, filling in opd_ent_ vector,
2246 template<int size
, bool big_endian
>
2248 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2250 this->base_read_symbols(sd
);
2253 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2254 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2255 const unsigned char* namesu
= sd
->section_names
->data();
2256 const char* names
= reinterpret_cast<const char*>(namesu
);
2257 const unsigned char* s
= NULL
;
2258 const unsigned char* opd
;
2259 section_size_type opd_size
;
2261 // Find and read .opd section.
2264 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2265 sd
->section_names_size
,
2270 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2271 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2272 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2274 if (this->abiversion() == 0)
2275 this->set_abiversion(1);
2276 else if (this->abiversion() > 1)
2277 gold_error(_("%s: .opd invalid in abiv%d"),
2278 this->name().c_str(), this->abiversion());
2280 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2281 this->opd_address_
= shdr
.get_sh_addr();
2282 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2283 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2289 // Build set of executable sections.
2290 // Using a set is probably overkill. There is likely to be only
2291 // a few executable sections, typically .init, .text and .fini,
2292 // and they are generally grouped together.
2293 typedef std::set
<Sec_info
> Exec_sections
;
2294 Exec_sections exec_sections
;
2296 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2298 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2299 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2300 && ((shdr
.get_sh_flags()
2301 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2302 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2303 && shdr
.get_sh_size() != 0)
2305 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2306 shdr
.get_sh_size(), i
));
2309 if (exec_sections
.empty())
2312 // Look over the OPD entries. This is complicated by the fact
2313 // that some binaries will use two-word entries while others
2314 // will use the standard three-word entries. In most cases
2315 // the third word (the environment pointer for languages like
2316 // Pascal) is unused and will be zero. If the third word is
2317 // used it should not be pointing into executable sections,
2319 this->init_opd(opd_size
);
2320 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2322 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2323 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2324 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2326 // Chances are that this is the third word of an OPD entry.
2328 typename
Exec_sections::const_iterator e
2329 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2330 if (e
!= exec_sections
.begin())
2333 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2335 // We have an address in an executable section.
2336 // VAL ought to be the function entry, set it up.
2337 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2338 // Skip second word of OPD entry, the TOC pointer.
2342 // If we didn't match any executable sections, we likely
2343 // have a non-zero third word in the OPD entry.
2348 // Relocate sections.
2350 template<int size
, bool big_endian
>
2352 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2353 const Symbol_table
* symtab
, const Layout
* layout
,
2354 const unsigned char* pshdrs
, Output_file
* of
,
2355 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2357 unsigned int start
= 1;
2359 && this->relatoc_
!= 0
2360 && !parameters
->options().relocatable())
2362 // Relocate .toc first.
2363 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2364 this->relatoc_
, this->relatoc_
);
2365 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2366 1, this->relatoc_
- 1);
2367 start
= this->relatoc_
+ 1;
2369 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2370 start
, this->shnum() - 1);
2373 // Set up some symbols.
2375 template<int size
, bool big_endian
>
2377 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2378 Symbol_table
* symtab
,
2383 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2384 // undefined when scanning relocs (and thus requires
2385 // non-relative dynamic relocs). The proper value will be
2387 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2388 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2390 Target_powerpc
<size
, big_endian
>* target
=
2391 static_cast<Target_powerpc
<size
, big_endian
>*>(
2392 parameters
->sized_target
<size
, big_endian
>());
2393 Output_data_got_powerpc
<size
, big_endian
>* got
2394 = target
->got_section(symtab
, layout
);
2395 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2396 Symbol_table::PREDEFINED
,
2400 elfcpp::STV_HIDDEN
, 0,
2404 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2405 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2406 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2408 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2410 = layout
->add_output_section_data(".sdata", 0,
2412 | elfcpp::SHF_WRITE
,
2413 sdata
, ORDER_SMALL_DATA
, false);
2414 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2415 Symbol_table::PREDEFINED
,
2416 os
, 32768, 0, elfcpp::STT_OBJECT
,
2417 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2423 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2424 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2425 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2427 Target_powerpc
<size
, big_endian
>* target
=
2428 static_cast<Target_powerpc
<size
, big_endian
>*>(
2429 parameters
->sized_target
<size
, big_endian
>());
2430 Output_data_got_powerpc
<size
, big_endian
>* got
2431 = target
->got_section(symtab
, layout
);
2432 symtab
->define_in_output_data(".TOC.", NULL
,
2433 Symbol_table::PREDEFINED
,
2437 elfcpp::STV_HIDDEN
, 0,
2443 // Set up PowerPC target specific relobj.
2445 template<int size
, bool big_endian
>
2447 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2448 const std::string
& name
,
2449 Input_file
* input_file
,
2450 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2452 int et
= ehdr
.get_e_type();
2453 // ET_EXEC files are valid input for --just-symbols/-R,
2454 // and we treat them as relocatable objects.
2455 if (et
== elfcpp::ET_REL
2456 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2458 Powerpc_relobj
<size
, big_endian
>* obj
=
2459 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2463 else if (et
== elfcpp::ET_DYN
)
2465 Powerpc_dynobj
<size
, big_endian
>* obj
=
2466 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2472 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2477 template<int size
, bool big_endian
>
2478 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2481 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2482 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2484 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2485 : Output_data_got
<size
, big_endian
>(),
2486 symtab_(symtab
), layout_(layout
),
2487 header_ent_cnt_(size
== 32 ? 3 : 1),
2488 header_index_(size
== 32 ? 0x2000 : 0)
2491 this->set_addralign(256);
2494 // Override all the Output_data_got methods we use so as to first call
2497 add_global(Symbol
* gsym
, unsigned int got_type
)
2499 this->reserve_ent();
2500 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2504 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2506 this->reserve_ent();
2507 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2511 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2512 { return this->add_global_plt(gsym
, got_type
); }
2515 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2516 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2518 this->reserve_ent();
2519 Output_data_got
<size
, big_endian
>::
2520 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2524 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2525 Output_data_reloc_generic
* rel_dyn
,
2526 unsigned int r_type_1
, unsigned int r_type_2
)
2528 this->reserve_ent(2);
2529 Output_data_got
<size
, big_endian
>::
2530 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2534 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2536 this->reserve_ent();
2537 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2542 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2544 this->reserve_ent();
2545 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2550 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2551 { return this->add_local_plt(object
, sym_index
, got_type
); }
2554 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2555 unsigned int got_type
,
2556 Output_data_reloc_generic
* rel_dyn
,
2557 unsigned int r_type
)
2559 this->reserve_ent(2);
2560 Output_data_got
<size
, big_endian
>::
2561 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2565 add_constant(Valtype constant
)
2567 this->reserve_ent();
2568 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2572 add_constant_pair(Valtype c1
, Valtype c2
)
2574 this->reserve_ent(2);
2575 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2578 // Offset of _GLOBAL_OFFSET_TABLE_.
2582 return this->got_offset(this->header_index_
);
2585 // Offset of base used to access the GOT/TOC.
2586 // The got/toc pointer reg will be set to this value.
2588 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2591 return this->g_o_t();
2593 return (this->output_section()->address()
2594 + object
->toc_base_offset()
2598 // Ensure our GOT has a header.
2600 set_final_data_size()
2602 if (this->header_ent_cnt_
!= 0)
2603 this->make_header();
2604 Output_data_got
<size
, big_endian
>::set_final_data_size();
2607 // First word of GOT header needs some values that are not
2608 // handled by Output_data_got so poke them in here.
2609 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2611 do_write(Output_file
* of
)
2614 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2615 val
= this->layout_
->dynamic_section()->address();
2617 val
= this->output_section()->address() + 0x8000;
2618 this->replace_constant(this->header_index_
, val
);
2619 Output_data_got
<size
, big_endian
>::do_write(of
);
2624 reserve_ent(unsigned int cnt
= 1)
2626 if (this->header_ent_cnt_
== 0)
2628 if (this->num_entries() + cnt
> this->header_index_
)
2629 this->make_header();
2635 this->header_ent_cnt_
= 0;
2636 this->header_index_
= this->num_entries();
2639 Output_data_got
<size
, big_endian
>::add_constant(0);
2640 Output_data_got
<size
, big_endian
>::add_constant(0);
2641 Output_data_got
<size
, big_endian
>::add_constant(0);
2643 // Define _GLOBAL_OFFSET_TABLE_ at the header
2644 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2647 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2648 sym
->set_value(this->g_o_t());
2651 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2652 Symbol_table::PREDEFINED
,
2653 this, this->g_o_t(), 0,
2656 elfcpp::STV_HIDDEN
, 0,
2660 Output_data_got
<size
, big_endian
>::add_constant(0);
2663 // Stashed pointers.
2664 Symbol_table
* symtab_
;
2668 unsigned int header_ent_cnt_
;
2669 // GOT header index.
2670 unsigned int header_index_
;
2673 // Get the GOT section, creating it if necessary.
2675 template<int size
, bool big_endian
>
2676 Output_data_got_powerpc
<size
, big_endian
>*
2677 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2680 if (this->got_
== NULL
)
2682 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2685 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2687 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2688 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2689 this->got_
, ORDER_DATA
, false);
2695 // Get the dynamic reloc section, creating it if necessary.
2697 template<int size
, bool big_endian
>
2698 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2699 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2701 if (this->rela_dyn_
== NULL
)
2703 gold_assert(layout
!= NULL
);
2704 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2705 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2706 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2707 ORDER_DYNAMIC_RELOCS
, false);
2709 return this->rela_dyn_
;
2712 // Similarly, but for ifunc symbols get the one for ifunc.
2714 template<int size
, bool big_endian
>
2715 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2716 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2721 return this->rela_dyn_section(layout
);
2723 if (this->iplt_
== NULL
)
2724 this->make_iplt_section(symtab
, layout
);
2725 return this->iplt_
->rel_plt();
2731 // Determine the stub group size. The group size is the absolute
2732 // value of the parameter --stub-group-size. If --stub-group-size
2733 // is passed a negative value, we restrict stubs to be always after
2734 // the stubbed branches.
2735 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2736 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2737 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2738 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2739 owner_(NULL
), output_section_(NULL
)
2743 // Return true iff input section can be handled by current stub
2746 can_add_to_stub_group(Output_section
* o
,
2747 const Output_section::Input_section
* i
,
2750 const Output_section::Input_section
*
2756 { return output_section_
; }
2759 set_output_and_owner(Output_section
* o
,
2760 const Output_section::Input_section
* i
)
2762 this->output_section_
= o
;
2771 // Adding group sections before the stubs.
2772 FINDING_STUB_SECTION
,
2773 // Adding group sections after the stubs.
2777 uint32_t stub_group_size_
;
2778 bool stubs_always_after_branch_
;
2779 bool suppress_size_errors_
;
2780 // True if a stub group can serve multiple output sections.
2783 // Current max size of group. Starts at stub_group_size_ but is
2784 // reduced to stub_group_size_/1024 on seeing a section with
2785 // external conditional branches.
2786 uint32_t group_size_
;
2787 uint64_t group_start_addr_
;
2788 // owner_ and output_section_ specify the section to which stubs are
2789 // attached. The stubs are placed at the end of this section.
2790 const Output_section::Input_section
* owner_
;
2791 Output_section
* output_section_
;
2794 // Return true iff input section can be handled by current stub
2795 // group. Sections are presented to this function in order,
2796 // so the first section is the head of the group.
2799 Stub_control::can_add_to_stub_group(Output_section
* o
,
2800 const Output_section::Input_section
* i
,
2803 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2805 uint64_t start_addr
= o
->address();
2808 // .init and .fini sections are pasted together to form a single
2809 // function. We can't be adding stubs in the middle of the function.
2810 this_size
= o
->data_size();
2813 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2814 this_size
= i
->data_size();
2817 uint64_t end_addr
= start_addr
+ this_size
;
2818 uint32_t group_size
= this->stub_group_size_
;
2820 this->group_size_
= group_size
= group_size
>> 10;
2822 if (this_size
> group_size
&& !this->suppress_size_errors_
)
2823 gold_warning(_("%s:%s exceeds group size"),
2824 i
->relobj()->name().c_str(),
2825 i
->relobj()->section_name(i
->shndx()).c_str());
2827 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
2828 has14
? " 14bit" : "",
2829 i
->relobj()->name().c_str(),
2830 i
->relobj()->section_name(i
->shndx()).c_str(),
2831 (long long) this_size
,
2832 (this->state_
== NO_GROUP
2834 : (long long) end_addr
- this->group_start_addr_
));
2836 if (this->state_
== NO_GROUP
)
2838 // Only here on very first use of Stub_control
2840 this->output_section_
= o
;
2841 this->state_
= FINDING_STUB_SECTION
;
2842 this->group_size_
= group_size
;
2843 this->group_start_addr_
= start_addr
;
2846 else if (!this->multi_os_
&& this->output_section_
!= o
)
2848 else if (this->state_
== HAS_STUB_SECTION
)
2850 // Can we add this section, which is after the stubs, to the
2852 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
2855 else if (this->state_
== FINDING_STUB_SECTION
)
2857 if ((whole_sec
&& this->output_section_
== o
)
2858 || end_addr
- this->group_start_addr_
<= this->group_size_
)
2860 // Stubs are added at the end of "owner_".
2862 this->output_section_
= o
;
2865 // The group before the stubs has reached maximum size.
2866 // Now see about adding sections after the stubs to the
2867 // group. If the current section has a 14-bit branch and
2868 // the group before the stubs exceeds group_size_ (because
2869 // they didn't have 14-bit branches), don't add sections
2870 // after the stubs: The size of stubs for such a large
2871 // group may exceed the reach of a 14-bit branch.
2872 if (!this->stubs_always_after_branch_
2873 && this_size
<= this->group_size_
2874 && start_addr
- this->group_start_addr_
<= this->group_size_
)
2876 gold_debug(DEBUG_TARGET
, "adding after stubs");
2877 this->state_
= HAS_STUB_SECTION
;
2878 this->group_start_addr_
= start_addr
;
2885 gold_debug(DEBUG_TARGET
,
2886 !this->multi_os_
&& this->output_section_
!= o
2887 ? "nope, new output section\n"
2888 : "nope, didn't fit\n");
2890 // The section fails to fit in the current group. Set up a few
2891 // things for the next group. owner_ and output_section_ will be
2892 // set later after we've retrieved those values for the current
2894 this->state_
= FINDING_STUB_SECTION
;
2895 this->group_size_
= group_size
;
2896 this->group_start_addr_
= start_addr
;
2900 // Look over all the input sections, deciding where to place stubs.
2902 template<int size
, bool big_endian
>
2904 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2906 bool no_size_errors
)
2908 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
2909 parameters
->options().stub_group_multi());
2911 // Group input sections and insert stub table
2912 Stub_table_owner
* table_owner
= NULL
;
2913 std::vector
<Stub_table_owner
*> tables
;
2914 Layout::Section_list section_list
;
2915 layout
->get_executable_sections(§ion_list
);
2916 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2917 for (Layout::Section_list::iterator o
= section_list
.begin();
2918 o
!= section_list
.end();
2921 typedef Output_section::Input_section_list Input_section_list
;
2922 for (Input_section_list::const_iterator i
2923 = (*o
)->input_sections().begin();
2924 i
!= (*o
)->input_sections().end();
2927 if (i
->is_input_section()
2928 || i
->is_relaxed_input_section())
2930 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2931 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2932 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2933 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2935 table_owner
->output_section
= stub_control
.output_section();
2936 table_owner
->owner
= stub_control
.owner();
2937 stub_control
.set_output_and_owner(*o
, &*i
);
2940 if (table_owner
== NULL
)
2942 table_owner
= new Stub_table_owner
;
2943 tables
.push_back(table_owner
);
2945 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2949 if (table_owner
!= NULL
)
2951 table_owner
->output_section
= stub_control
.output_section();
2952 table_owner
->owner
= stub_control
.owner();;
2954 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2958 Stub_table
<size
, big_endian
>* stub_table
;
2960 if ((*t
)->owner
->is_input_section())
2961 stub_table
= new Stub_table
<size
, big_endian
>(this,
2962 (*t
)->output_section
,
2964 this->stub_tables_
.size());
2965 else if ((*t
)->owner
->is_relaxed_input_section())
2966 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2967 (*t
)->owner
->relaxed_input_section());
2970 this->stub_tables_
.push_back(stub_table
);
2975 static unsigned long
2976 max_branch_delta (unsigned int r_type
)
2978 if (r_type
== elfcpp::R_POWERPC_REL14
2979 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2980 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2982 if (r_type
== elfcpp::R_POWERPC_REL24
2983 || r_type
== elfcpp::R_PPC_PLTREL24
2984 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2989 // Return whether this branch is going via a plt call stub.
2991 template<int size
, bool big_endian
>
2993 Target_powerpc
<size
, big_endian
>::Branch_info::mark_pltcall(
2994 Powerpc_relobj
<size
, big_endian
>* ppc_object
,
2997 Target_powerpc
* target
,
2998 Symbol_table
* symtab
)
3000 if (this->object_
!= ppc_object
3001 || this->shndx_
!= shndx
3002 || this->offset_
!= offset
)
3005 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3006 if (sym
!= NULL
&& sym
->is_forwarder())
3007 sym
= symtab
->resolve_forwards(sym
);
3008 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3010 ? (gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3011 && !target
->is_elfv2_localentry0(gsym
))
3012 : (this->object_
->local_has_plt_offset(this->r_sym_
)
3013 && !target
->is_elfv2_localentry0(this->object_
, this->r_sym_
)))
3021 // If this branch needs a plt call stub, or a long branch stub, make one.
3023 template<int size
, bool big_endian
>
3025 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
3026 Stub_table
<size
, big_endian
>* stub_table
,
3027 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
3028 Symbol_table
* symtab
) const
3030 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3031 if (sym
!= NULL
&& sym
->is_forwarder())
3032 sym
= symtab
->resolve_forwards(sym
);
3033 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3034 Target_powerpc
<size
, big_endian
>* target
=
3035 static_cast<Target_powerpc
<size
, big_endian
>*>(
3036 parameters
->sized_target
<size
, big_endian
>());
3040 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3041 : this->object_
->local_has_plt_offset(this->r_sym_
))
3045 && target
->abiversion() >= 2
3046 && !parameters
->options().output_is_position_independent()
3047 && !is_branch_reloc(this->r_type_
))
3048 target
->glink_section()->add_global_entry(gsym
);
3051 if (stub_table
== NULL
)
3052 stub_table
= this->object_
->stub_table(this->shndx_
);
3053 if (stub_table
== NULL
)
3055 // This is a ref from a data section to an ifunc symbol.
3056 stub_table
= ifunc_stub_table
;
3058 gold_assert(stub_table
!= NULL
);
3059 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3060 if (from
!= invalid_address
)
3061 from
+= (this->object_
->output_section(this->shndx_
)->address()
3064 ok
= stub_table
->add_plt_call_entry(from
,
3065 this->object_
, gsym
,
3066 this->r_type_
, this->addend_
,
3069 ok
= stub_table
->add_plt_call_entry(from
,
3070 this->object_
, this->r_sym_
,
3071 this->r_type_
, this->addend_
,
3077 Address max_branch_offset
= max_branch_delta(this->r_type_
);
3078 if (max_branch_offset
== 0)
3080 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3081 gold_assert(from
!= invalid_address
);
3082 from
+= (this->object_
->output_section(this->shndx_
)->address()
3087 switch (gsym
->source())
3089 case Symbol::FROM_OBJECT
:
3091 Object
* symobj
= gsym
->object();
3092 if (symobj
->is_dynamic()
3093 || symobj
->pluginobj() != NULL
)
3096 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
3097 if (shndx
== elfcpp::SHN_UNDEF
)
3102 case Symbol::IS_UNDEFINED
:
3108 Symbol_table::Compute_final_value_status status
;
3109 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
3110 if (status
!= Symbol_table::CFVS_OK
)
3113 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
3117 const Symbol_value
<size
>* psymval
3118 = this->object_
->local_symbol(this->r_sym_
);
3119 Symbol_value
<size
> symval
;
3120 if (psymval
->is_section_symbol())
3121 symval
.set_is_section_symbol();
3122 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
3123 typename
ObjType::Compute_final_local_value_status status
3124 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
3126 if (status
!= ObjType::CFLV_OK
3127 || !symval
.has_output_value())
3129 to
= symval
.value(this->object_
, 0);
3131 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
3133 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
3134 to
+= this->addend_
;
3135 if (stub_table
== NULL
)
3136 stub_table
= this->object_
->stub_table(this->shndx_
);
3137 if (size
== 64 && target
->abiversion() < 2)
3139 unsigned int dest_shndx
;
3140 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
3144 Address delta
= to
- from
;
3145 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
3147 if (stub_table
== NULL
)
3149 gold_warning(_("%s:%s: branch in non-executable section,"
3150 " no long branch stub for you"),
3151 this->object_
->name().c_str(),
3152 this->object_
->section_name(this->shndx_
).c_str());
3155 bool save_res
= (size
== 64
3157 && gsym
->source() == Symbol::IN_OUTPUT_DATA
3158 && gsym
->output_data() == target
->savres_section());
3159 ok
= stub_table
->add_long_branch_entry(this->object_
,
3161 from
, to
, save_res
);
3165 gold_debug(DEBUG_TARGET
,
3166 "branch at %s:%s+%#lx\n"
3167 "can't reach stub attached to %s:%s",
3168 this->object_
->name().c_str(),
3169 this->object_
->section_name(this->shndx_
).c_str(),
3170 (unsigned long) this->offset_
,
3171 stub_table
->relobj()->name().c_str(),
3172 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3177 // Relaxation hook. This is where we do stub generation.
3179 template<int size
, bool big_endian
>
3181 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3182 const Input_objects
*,
3183 Symbol_table
* symtab
,
3187 unsigned int prev_brlt_size
= 0;
3191 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3193 && this->abiversion() < 2
3195 && !parameters
->options().user_set_plt_thread_safe())
3197 static const char* const thread_starter
[] =
3201 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3203 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3204 "mq_notify", "create_timer",
3209 "GOMP_parallel_start",
3210 "GOMP_parallel_loop_static",
3211 "GOMP_parallel_loop_static_start",
3212 "GOMP_parallel_loop_dynamic",
3213 "GOMP_parallel_loop_dynamic_start",
3214 "GOMP_parallel_loop_guided",
3215 "GOMP_parallel_loop_guided_start",
3216 "GOMP_parallel_loop_runtime",
3217 "GOMP_parallel_loop_runtime_start",
3218 "GOMP_parallel_sections",
3219 "GOMP_parallel_sections_start",
3224 if (parameters
->options().shared())
3228 for (unsigned int i
= 0;
3229 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3232 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3233 thread_safe
= (sym
!= NULL
3235 && sym
->in_real_elf());
3241 this->plt_thread_safe_
= thread_safe
;
3246 this->stub_group_size_
= parameters
->options().stub_group_size();
3247 bool no_size_errors
= true;
3248 if (this->stub_group_size_
== 1)
3249 this->stub_group_size_
= 0x1c00000;
3250 else if (this->stub_group_size_
== -1)
3251 this->stub_group_size_
= -0x1e00000;
3253 no_size_errors
= false;
3254 this->group_sections(layout
, task
, no_size_errors
);
3256 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3258 this->branch_lookup_table_
.clear();
3259 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3260 p
!= this->stub_tables_
.end();
3263 (*p
)->clear_stubs(true);
3265 this->stub_tables_
.clear();
3266 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3267 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3268 program_name
, this->stub_group_size_
);
3269 this->group_sections(layout
, task
, true);
3272 // We need address of stub tables valid for make_stub.
3273 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3274 p
!= this->stub_tables_
.end();
3277 const Powerpc_relobj
<size
, big_endian
>* object
3278 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3279 Address off
= object
->get_output_section_offset((*p
)->shndx());
3280 gold_assert(off
!= invalid_address
);
3281 Output_section
* os
= (*p
)->output_section();
3282 (*p
)->set_address_and_size(os
, off
);
3287 // Clear plt call stubs, long branch stubs and branch lookup table.
3288 prev_brlt_size
= this->branch_lookup_table_
.size();
3289 this->branch_lookup_table_
.clear();
3290 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3291 p
!= this->stub_tables_
.end();
3294 (*p
)->clear_stubs(false);
3298 // Build all the stubs.
3299 this->relax_failed_
= false;
3300 Stub_table
<size
, big_endian
>* ifunc_stub_table
3301 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3302 Stub_table
<size
, big_endian
>* one_stub_table
3303 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3304 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3305 b
!= this->branch_info_
.end();
3308 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3309 && !this->relax_failed_
)
3311 this->relax_failed_
= true;
3312 this->relax_fail_count_
++;
3313 if (this->relax_fail_count_
< 3)
3318 // Did anything change size?
3319 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3320 bool again
= num_huge_branches
!= prev_brlt_size
;
3321 if (size
== 64 && num_huge_branches
!= 0)
3322 this->make_brlt_section(layout
);
3323 if (size
== 64 && again
)
3324 this->brlt_section_
->set_current_size(num_huge_branches
);
3326 typedef Unordered_set
<Output_section
*> Output_sections
;
3327 Output_sections os_need_update
;
3328 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3329 p
!= this->stub_tables_
.end();
3332 if ((*p
)->size_update())
3335 (*p
)->add_eh_frame(layout
);
3336 os_need_update
.insert((*p
)->output_section());
3340 // Set output section offsets for all input sections in an output
3341 // section that just changed size. Anything past the stubs will
3343 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3344 p
!= os_need_update
.end();
3347 Output_section
* os
= *p
;
3349 typedef Output_section::Input_section_list Input_section_list
;
3350 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3351 i
!= os
->input_sections().end();
3354 off
= align_address(off
, i
->addralign());
3355 if (i
->is_input_section() || i
->is_relaxed_input_section())
3356 i
->relobj()->set_section_offset(i
->shndx(), off
);
3357 if (i
->is_relaxed_input_section())
3359 Stub_table
<size
, big_endian
>* stub_table
3360 = static_cast<Stub_table
<size
, big_endian
>*>(
3361 i
->relaxed_input_section());
3362 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3363 off
+= stub_table_size
;
3364 // After a few iterations, set current stub table size
3365 // as min size threshold, so later stub tables can only
3368 stub_table
->set_min_size_threshold(stub_table_size
);
3371 off
+= i
->data_size();
3373 // If .branch_lt is part of this output section, then we have
3374 // just done the offset adjustment.
3375 os
->clear_section_offsets_need_adjustment();
3380 && num_huge_branches
!= 0
3381 && parameters
->options().output_is_position_independent())
3383 // Fill in the BRLT relocs.
3384 this->brlt_section_
->reset_brlt_sizes();
3385 for (typename
Branch_lookup_table::const_iterator p
3386 = this->branch_lookup_table_
.begin();
3387 p
!= this->branch_lookup_table_
.end();
3390 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3392 this->brlt_section_
->finalize_brlt_sizes();
3396 && (parameters
->options().user_set_emit_stub_syms()
3397 ? parameters
->options().emit_stub_syms()
3399 || parameters
->options().output_is_position_independent()
3400 || parameters
->options().emit_relocs())))
3402 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3403 p
!= this->stub_tables_
.end();
3405 (*p
)->define_stub_syms(symtab
);
3407 if (this->glink_
!= NULL
)
3409 int stub_size
= this->glink_
->pltresolve_size
;
3410 Address value
= -stub_size
;
3416 this->define_local(symtab
, "__glink_PLTresolve",
3417 this->glink_
, value
, stub_size
);
3420 this->define_local(symtab
, "__glink", this->glink_
, 0, 0);
3427 template<int size
, bool big_endian
>
3429 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3430 unsigned char* oview
,
3434 uint64_t address
= plt
->address();
3435 off_t len
= plt
->data_size();
3437 if (plt
== this->glink_
)
3439 // See Output_data_glink::do_write() for glink contents.
3442 gold_assert(parameters
->doing_static_link());
3443 // Static linking may need stubs, to support ifunc and long
3444 // branches. We need to create an output section for
3445 // .eh_frame early in the link process, to have a place to
3446 // attach stub .eh_frame info. We also need to have
3447 // registered a CIE that matches the stub CIE. Both of
3448 // these requirements are satisfied by creating an FDE and
3449 // CIE for .glink, even though static linking will leave
3450 // .glink zero length.
3451 // ??? Hopefully generating an FDE with a zero address range
3452 // won't confuse anything that consumes .eh_frame info.
3454 else if (size
== 64)
3456 // There is one word before __glink_PLTresolve
3460 else if (parameters
->options().output_is_position_independent())
3462 // There are two FDEs for a position independent glink.
3463 // The first covers the branch table, the second
3464 // __glink_PLTresolve at the end of glink.
3465 off_t resolve_size
= this->glink_
->pltresolve_size
;
3466 if (oview
[9] == elfcpp::DW_CFA_nop
)
3467 len
-= resolve_size
;
3470 address
+= len
- resolve_size
;
3477 // Must be a stub table.
3478 const Stub_table
<size
, big_endian
>* stub_table
3479 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3480 uint64_t stub_address
= stub_table
->stub_address();
3481 len
-= stub_address
- address
;
3482 address
= stub_address
;
3485 *paddress
= address
;
3489 // A class to handle the PLT data.
3491 template<int size
, bool big_endian
>
3492 class Output_data_plt_powerpc
: public Output_section_data_build
3495 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3496 size
, big_endian
> Reloc_section
;
3498 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3499 Reloc_section
* plt_rel
,
3501 : Output_section_data_build(size
== 32 ? 4 : 8),
3507 // Add an entry to the PLT.
3512 add_ifunc_entry(Symbol
*);
3515 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3517 // Return the .rela.plt section data.
3524 // Return the number of PLT entries.
3528 if (this->current_data_size() == 0)
3530 return ((this->current_data_size() - this->first_plt_entry_offset())
3531 / this->plt_entry_size());
3536 do_adjust_output_section(Output_section
* os
)
3541 // Write to a map file.
3543 do_print_to_mapfile(Mapfile
* mapfile
) const
3544 { mapfile
->print_output_data(this, this->name_
); }
3547 // Return the offset of the first non-reserved PLT entry.
3549 first_plt_entry_offset() const
3551 // IPLT has no reserved entry.
3552 if (this->name_
[3] == 'I')
3554 return this->targ_
->first_plt_entry_offset();
3557 // Return the size of each PLT entry.
3559 plt_entry_size() const
3561 return this->targ_
->plt_entry_size();
3564 // Write out the PLT data.
3566 do_write(Output_file
*);
3568 // The reloc section.
3569 Reloc_section
* rel_
;
3570 // Allows access to .glink for do_write.
3571 Target_powerpc
<size
, big_endian
>* targ_
;
3572 // What to report in map file.
3576 // Add an entry to the PLT.
3578 template<int size
, bool big_endian
>
3580 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3582 if (!gsym
->has_plt_offset())
3584 section_size_type off
= this->current_data_size();
3586 off
+= this->first_plt_entry_offset();
3587 gsym
->set_plt_offset(off
);
3588 gsym
->set_needs_dynsym_entry();
3589 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3590 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3591 off
+= this->plt_entry_size();
3592 this->set_current_data_size(off
);
3596 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3598 template<int size
, bool big_endian
>
3600 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3602 if (!gsym
->has_plt_offset())
3604 section_size_type off
= this->current_data_size();
3605 gsym
->set_plt_offset(off
);
3606 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3607 if (size
== 64 && this->targ_
->abiversion() < 2)
3608 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3609 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3610 off
+= this->plt_entry_size();
3611 this->set_current_data_size(off
);
3615 // Add an entry for a local ifunc symbol to the IPLT.
3617 template<int size
, bool big_endian
>
3619 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3620 Sized_relobj_file
<size
, big_endian
>* relobj
,
3621 unsigned int local_sym_index
)
3623 if (!relobj
->local_has_plt_offset(local_sym_index
))
3625 section_size_type off
= this->current_data_size();
3626 relobj
->set_local_plt_offset(local_sym_index
, off
);
3627 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3628 if (size
== 64 && this->targ_
->abiversion() < 2)
3629 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3630 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3632 off
+= this->plt_entry_size();
3633 this->set_current_data_size(off
);
3637 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3638 static const uint32_t add_2_2_11
= 0x7c425a14;
3639 static const uint32_t add_2_2_12
= 0x7c426214;
3640 static const uint32_t add_3_3_2
= 0x7c631214;
3641 static const uint32_t add_3_3_13
= 0x7c636a14;
3642 static const uint32_t add_11_0_11
= 0x7d605a14;
3643 static const uint32_t add_11_2_11
= 0x7d625a14;
3644 static const uint32_t add_11_11_2
= 0x7d6b1214;
3645 static const uint32_t addi_0_12
= 0x380c0000;
3646 static const uint32_t addi_2_2
= 0x38420000;
3647 static const uint32_t addi_3_3
= 0x38630000;
3648 static const uint32_t addi_11_11
= 0x396b0000;
3649 static const uint32_t addi_12_1
= 0x39810000;
3650 static const uint32_t addi_12_12
= 0x398c0000;
3651 static const uint32_t addis_0_2
= 0x3c020000;
3652 static const uint32_t addis_0_13
= 0x3c0d0000;
3653 static const uint32_t addis_2_12
= 0x3c4c0000;
3654 static const uint32_t addis_11_2
= 0x3d620000;
3655 static const uint32_t addis_11_11
= 0x3d6b0000;
3656 static const uint32_t addis_11_30
= 0x3d7e0000;
3657 static const uint32_t addis_12_1
= 0x3d810000;
3658 static const uint32_t addis_12_2
= 0x3d820000;
3659 static const uint32_t addis_12_12
= 0x3d8c0000;
3660 static const uint32_t b
= 0x48000000;
3661 static const uint32_t bcl_20_31
= 0x429f0005;
3662 static const uint32_t bctr
= 0x4e800420;
3663 static const uint32_t blr
= 0x4e800020;
3664 static const uint32_t bnectr_p4
= 0x4ce20420;
3665 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3666 static const uint32_t cmpldi_2_0
= 0x28220000;
3667 static const uint32_t cror_15_15_15
= 0x4def7b82;
3668 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3669 static const uint32_t ld_0_1
= 0xe8010000;
3670 static const uint32_t ld_0_12
= 0xe80c0000;
3671 static const uint32_t ld_2_1
= 0xe8410000;
3672 static const uint32_t ld_2_2
= 0xe8420000;
3673 static const uint32_t ld_2_11
= 0xe84b0000;
3674 static const uint32_t ld_2_12
= 0xe84c0000;
3675 static const uint32_t ld_11_2
= 0xe9620000;
3676 static const uint32_t ld_11_11
= 0xe96b0000;
3677 static const uint32_t ld_12_2
= 0xe9820000;
3678 static const uint32_t ld_12_11
= 0xe98b0000;
3679 static const uint32_t ld_12_12
= 0xe98c0000;
3680 static const uint32_t lfd_0_1
= 0xc8010000;
3681 static const uint32_t li_0_0
= 0x38000000;
3682 static const uint32_t li_12_0
= 0x39800000;
3683 static const uint32_t lis_0
= 0x3c000000;
3684 static const uint32_t lis_2
= 0x3c400000;
3685 static const uint32_t lis_11
= 0x3d600000;
3686 static const uint32_t lis_12
= 0x3d800000;
3687 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3688 static const uint32_t lwz_0_12
= 0x800c0000;
3689 static const uint32_t lwz_11_11
= 0x816b0000;
3690 static const uint32_t lwz_11_30
= 0x817e0000;
3691 static const uint32_t lwz_12_12
= 0x818c0000;
3692 static const uint32_t lwzu_0_12
= 0x840c0000;
3693 static const uint32_t mflr_0
= 0x7c0802a6;
3694 static const uint32_t mflr_11
= 0x7d6802a6;
3695 static const uint32_t mflr_12
= 0x7d8802a6;
3696 static const uint32_t mtctr_0
= 0x7c0903a6;
3697 static const uint32_t mtctr_11
= 0x7d6903a6;
3698 static const uint32_t mtctr_12
= 0x7d8903a6;
3699 static const uint32_t mtlr_0
= 0x7c0803a6;
3700 static const uint32_t mtlr_12
= 0x7d8803a6;
3701 static const uint32_t nop
= 0x60000000;
3702 static const uint32_t ori_0_0_0
= 0x60000000;
3703 static const uint32_t srdi_0_0_2
= 0x7800f082;
3704 static const uint32_t std_0_1
= 0xf8010000;
3705 static const uint32_t std_0_12
= 0xf80c0000;
3706 static const uint32_t std_2_1
= 0xf8410000;
3707 static const uint32_t stfd_0_1
= 0xd8010000;
3708 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3709 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3710 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3711 static const uint32_t xor_2_12_12
= 0x7d826278;
3712 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3714 // Write out the PLT.
3716 template<int size
, bool big_endian
>
3718 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3720 if (size
== 32 && this->name_
[3] != 'I')
3722 const section_size_type offset
= this->offset();
3723 const section_size_type oview_size
3724 = convert_to_section_size_type(this->data_size());
3725 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3726 unsigned char* pov
= oview
;
3727 unsigned char* endpov
= oview
+ oview_size
;
3729 // The address of the .glink branch table
3730 const Output_data_glink
<size
, big_endian
>* glink
3731 = this->targ_
->glink_section();
3732 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3734 while (pov
< endpov
)
3736 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3741 of
->write_output_view(offset
, oview_size
, oview
);
3745 // Create the PLT section.
3747 template<int size
, bool big_endian
>
3749 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3752 if (this->plt_
== NULL
)
3754 if (this->got_
== NULL
)
3755 this->got_section(symtab
, layout
);
3757 if (this->glink_
== NULL
)
3758 make_glink_section(layout
);
3760 // Ensure that .rela.dyn always appears before .rela.plt This is
3761 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3762 // needs to include .rela.plt in its range.
3763 this->rela_dyn_section(layout
);
3765 Reloc_section
* plt_rel
= new Reloc_section(false);
3766 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3767 elfcpp::SHF_ALLOC
, plt_rel
,
3768 ORDER_DYNAMIC_PLT_RELOCS
, false);
3770 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3772 layout
->add_output_section_data(".plt",
3774 ? elfcpp::SHT_PROGBITS
3775 : elfcpp::SHT_NOBITS
),
3776 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3783 Output_section
* rela_plt_os
= plt_rel
->output_section();
3784 rela_plt_os
->set_info_section(this->plt_
->output_section());
3788 // Create the IPLT section.
3790 template<int size
, bool big_endian
>
3792 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3795 if (this->iplt_
== NULL
)
3797 this->make_plt_section(symtab
, layout
);
3799 Reloc_section
* iplt_rel
= new Reloc_section(false);
3800 if (this->rela_dyn_
->output_section())
3801 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3803 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3805 if (this->plt_
->output_section())
3806 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3810 // A section for huge long branch addresses, similar to plt section.
3812 template<int size
, bool big_endian
>
3813 class Output_data_brlt_powerpc
: public Output_section_data_build
3816 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3817 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3818 size
, big_endian
> Reloc_section
;
3820 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3821 Reloc_section
* brlt_rel
)
3822 : Output_section_data_build(size
== 32 ? 4 : 8),
3830 this->reset_data_size();
3831 this->rel_
->reset_data_size();
3835 finalize_brlt_sizes()
3837 this->finalize_data_size();
3838 this->rel_
->finalize_data_size();
3841 // Add a reloc for an entry in the BRLT.
3843 add_reloc(Address to
, unsigned int off
)
3844 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3846 // Update section and reloc section size.
3848 set_current_size(unsigned int num_branches
)
3850 this->reset_address_and_file_offset();
3851 this->set_current_data_size(num_branches
* 16);
3852 this->finalize_data_size();
3853 Output_section
* os
= this->output_section();
3854 os
->set_section_offsets_need_adjustment();
3855 if (this->rel_
!= NULL
)
3857 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3858 this->rel_
->reset_address_and_file_offset();
3859 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3860 this->rel_
->finalize_data_size();
3861 Output_section
* os
= this->rel_
->output_section();
3862 os
->set_section_offsets_need_adjustment();
3868 do_adjust_output_section(Output_section
* os
)
3873 // Write to a map file.
3875 do_print_to_mapfile(Mapfile
* mapfile
) const
3876 { mapfile
->print_output_data(this, "** BRLT"); }
3879 // Write out the BRLT data.
3881 do_write(Output_file
*);
3883 // The reloc section.
3884 Reloc_section
* rel_
;
3885 Target_powerpc
<size
, big_endian
>* targ_
;
3888 // Make the branch lookup table section.
3890 template<int size
, bool big_endian
>
3892 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3894 if (size
== 64 && this->brlt_section_
== NULL
)
3896 Reloc_section
* brlt_rel
= NULL
;
3897 bool is_pic
= parameters
->options().output_is_position_independent();
3900 // When PIC we can't fill in .branch_lt (like .plt it can be
3901 // a bss style section) but must initialise at runtime via
3902 // dynamic relocations.
3903 this->rela_dyn_section(layout
);
3904 brlt_rel
= new Reloc_section(false);
3905 if (this->rela_dyn_
->output_section())
3906 this->rela_dyn_
->output_section()
3907 ->add_output_section_data(brlt_rel
);
3910 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3911 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
3912 this->plt_
->output_section()
3913 ->add_output_section_data(this->brlt_section_
);
3915 layout
->add_output_section_data(".branch_lt",
3916 (is_pic
? elfcpp::SHT_NOBITS
3917 : elfcpp::SHT_PROGBITS
),
3918 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3919 this->brlt_section_
,
3920 (is_pic
? ORDER_SMALL_BSS
3921 : ORDER_SMALL_DATA
),
3926 // Write out .branch_lt when non-PIC.
3928 template<int size
, bool big_endian
>
3930 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3932 if (size
== 64 && !parameters
->options().output_is_position_independent())
3934 const section_size_type offset
= this->offset();
3935 const section_size_type oview_size
3936 = convert_to_section_size_type(this->data_size());
3937 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3939 this->targ_
->write_branch_lookup_table(oview
);
3940 of
->write_output_view(offset
, oview_size
, oview
);
3944 static inline uint32_t
3950 static inline uint32_t
3956 static inline uint32_t
3959 return hi(a
+ 0x8000);
3965 static const unsigned char eh_frame_cie
[12];
3969 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3972 'z', 'R', 0, // Augmentation string.
3973 4, // Code alignment.
3974 0x80 - size
/ 8 , // Data alignment.
3976 1, // Augmentation size.
3977 (elfcpp::DW_EH_PE_pcrel
3978 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3979 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3982 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3983 static const unsigned char glink_eh_frame_fde_64v1
[] =
3985 0, 0, 0, 0, // Replaced with offset to .glink.
3986 0, 0, 0, 0, // Replaced with size of .glink.
3987 0, // Augmentation size.
3988 elfcpp::DW_CFA_advance_loc
+ 1,
3989 elfcpp::DW_CFA_register
, 65, 12,
3990 elfcpp::DW_CFA_advance_loc
+ 5,
3991 elfcpp::DW_CFA_restore_extended
, 65
3994 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3995 static const unsigned char glink_eh_frame_fde_64v2
[] =
3997 0, 0, 0, 0, // Replaced with offset to .glink.
3998 0, 0, 0, 0, // Replaced with size of .glink.
3999 0, // Augmentation size.
4000 elfcpp::DW_CFA_advance_loc
+ 1,
4001 elfcpp::DW_CFA_register
, 65, 0,
4002 elfcpp::DW_CFA_advance_loc
+ 7,
4003 elfcpp::DW_CFA_restore_extended
, 65
4006 // Describe __glink_PLTresolve use of LR, 32-bit version.
4007 static const unsigned char glink_eh_frame_fde_32
[] =
4009 0, 0, 0, 0, // Replaced with offset to .glink.
4010 0, 0, 0, 0, // Replaced with size of .glink.
4011 0, // Augmentation size.
4012 elfcpp::DW_CFA_advance_loc
+ 2,
4013 elfcpp::DW_CFA_register
, 65, 0,
4014 elfcpp::DW_CFA_advance_loc
+ 4,
4015 elfcpp::DW_CFA_restore_extended
, 65
4018 static const unsigned char default_fde
[] =
4020 0, 0, 0, 0, // Replaced with offset to stubs.
4021 0, 0, 0, 0, // Replaced with size of stubs.
4022 0, // Augmentation size.
4023 elfcpp::DW_CFA_nop
, // Pad.
4028 template<bool big_endian
>
4030 write_insn(unsigned char* p
, uint32_t v
)
4032 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
4035 // Stub_table holds information about plt and long branch stubs.
4036 // Stubs are built in an area following some input section determined
4037 // by group_sections(). This input section is converted to a relaxed
4038 // input section allowing it to be resized to accommodate the stubs
4040 template<int size
, bool big_endian
>
4041 class Stub_table
: public Output_relaxed_input_section
4046 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4047 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4051 unsigned int indx_
: 30;
4052 unsigned int r2save_
: 1;
4053 unsigned int localentry0_
: 1;
4055 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4056 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4058 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4059 Output_section
* output_section
,
4060 const Output_section::Input_section
* owner
,
4062 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4064 ->section_addralign(owner
->shndx())),
4065 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4066 orig_data_size_(owner
->current_data_size()),
4067 plt_size_(0), last_plt_size_(0),
4068 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4069 eh_frame_added_(false), need_save_res_(false), uniq_(id
)
4071 this->set_output_section(output_section
);
4073 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4074 new_relaxed
.push_back(this);
4075 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4078 // Add a plt call stub.
4080 add_plt_call_entry(Address
,
4081 const Sized_relobj_file
<size
, big_endian
>*,
4088 add_plt_call_entry(Address
,
4089 const Sized_relobj_file
<size
, big_endian
>*,
4095 // Find a given plt call stub.
4097 find_plt_call_entry(const Symbol
*) const;
4100 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4101 unsigned int) const;
4104 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4110 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4115 // Add a long branch stub.
4117 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4118 unsigned int, Address
, Address
, bool);
4121 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4125 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4127 Address max_branch_offset
= max_branch_delta(r_type
);
4128 if (max_branch_offset
== 0)
4130 gold_assert(from
!= invalid_address
);
4131 Address loc
= off
+ this->stub_address();
4132 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4136 clear_stubs(bool all
)
4138 this->plt_call_stubs_
.clear();
4139 this->plt_size_
= 0;
4140 this->long_branch_stubs_
.clear();
4141 this->branch_size_
= 0;
4142 this->need_save_res_
= false;
4145 this->last_plt_size_
= 0;
4146 this->last_branch_size_
= 0;
4151 set_address_and_size(const Output_section
* os
, Address off
)
4153 Address start_off
= off
;
4154 off
+= this->orig_data_size_
;
4155 Address my_size
= this->plt_size_
+ this->branch_size_
;
4156 if (this->need_save_res_
)
4157 my_size
+= this->targ_
->savres_section()->data_size();
4159 off
= align_address(off
, this->stub_align());
4160 // Include original section size and alignment padding in size
4161 my_size
+= off
- start_off
;
4162 // Ensure new size is always larger than min size
4163 // threshold. Alignment requirement is included in "my_size", so
4164 // increase "my_size" does not invalidate alignment.
4165 if (my_size
< this->min_size_threshold_
)
4166 my_size
= this->min_size_threshold_
;
4167 this->reset_address_and_file_offset();
4168 this->set_current_data_size(my_size
);
4169 this->set_address_and_file_offset(os
->address() + start_off
,
4170 os
->offset() + start_off
);
4175 stub_address() const
4177 return align_address(this->address() + this->orig_data_size_
,
4178 this->stub_align());
4184 return align_address(this->offset() + this->orig_data_size_
,
4185 this->stub_align());
4190 { return this->plt_size_
; }
4193 set_min_size_threshold(Address min_size
)
4194 { this->min_size_threshold_
= min_size
; }
4197 define_stub_syms(Symbol_table
*);
4202 Output_section
* os
= this->output_section();
4203 if (os
->addralign() < this->stub_align())
4205 os
->set_addralign(this->stub_align());
4206 // FIXME: get rid of the insane checkpointing.
4207 // We can't increase alignment of the input section to which
4208 // stubs are attached; The input section may be .init which
4209 // is pasted together with other .init sections to form a
4210 // function. Aligning might insert zero padding resulting in
4211 // sigill. However we do need to increase alignment of the
4212 // output section so that the align_address() on offset in
4213 // set_address_and_size() adds the same padding as the
4214 // align_address() on address in stub_address().
4215 // What's more, we need this alignment for the layout done in
4216 // relaxation_loop_body() so that the output section starts at
4217 // a suitably aligned address.
4218 os
->checkpoint_set_addralign(this->stub_align());
4220 if (this->last_plt_size_
!= this->plt_size_
4221 || this->last_branch_size_
!= this->branch_size_
)
4223 this->last_plt_size_
= this->plt_size_
;
4224 this->last_branch_size_
= this->branch_size_
;
4230 // Add .eh_frame info for this stub section. Unlike other linker
4231 // generated .eh_frame this is added late in the link, because we
4232 // only want the .eh_frame info if this particular stub section is
4235 add_eh_frame(Layout
* layout
)
4237 if (!this->eh_frame_added_
)
4239 if (!parameters
->options().ld_generated_unwind_info())
4242 // Since we add stub .eh_frame info late, it must be placed
4243 // after all other linker generated .eh_frame info so that
4244 // merge mapping need not be updated for input sections.
4245 // There is no provision to use a different CIE to that used
4247 if (!this->targ_
->has_glink())
4250 layout
->add_eh_frame_for_plt(this,
4251 Eh_cie
<size
>::eh_frame_cie
,
4252 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4254 sizeof (default_fde
));
4255 this->eh_frame_added_
= true;
4259 Target_powerpc
<size
, big_endian
>*
4265 class Plt_stub_key_hash
;
4266 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4267 Plt_stub_key_hash
> Plt_stub_entries
;
4268 class Branch_stub_ent
;
4269 class Branch_stub_ent_hash
;
4270 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4271 Branch_stub_ent_hash
> Branch_stub_entries
;
4273 // Alignment of stub section.
4279 unsigned int min_align
= 32;
4280 unsigned int user_align
= 1 << parameters
->options().plt_align();
4281 return std::max(user_align
, min_align
);
4284 // Return the plt offset for the given call stub.
4286 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4288 const Symbol
* gsym
= p
->first
.sym_
;
4291 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4292 && gsym
->can_use_relative_reloc(false));
4293 return gsym
->plt_offset();
4298 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4299 unsigned int local_sym_index
= p
->first
.locsym_
;
4300 return relobj
->local_plt_offset(local_sym_index
);
4304 // Size of a given plt call stub.
4306 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4312 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4314 plt_addr
+= this->targ_
->iplt_section()->address();
4316 plt_addr
+= this->targ_
->plt_section()->address();
4317 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4318 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4319 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4320 got_addr
+= ppcobj
->toc_base_offset();
4321 Address off
= plt_addr
- got_addr
;
4322 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4323 if (this->targ_
->abiversion() < 2)
4325 bool static_chain
= parameters
->options().plt_static_chain();
4326 bool thread_safe
= this->targ_
->plt_thread_safe();
4330 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4332 unsigned int align
= 1 << parameters
->options().plt_align();
4334 bytes
= (bytes
+ align
- 1) & -align
;
4338 // Return long branch stub size.
4340 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4342 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4343 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4345 if (size
== 64 || !parameters
->options().output_is_position_independent())
4352 do_write(Output_file
*);
4354 // Plt call stub keys.
4358 Plt_stub_key(const Symbol
* sym
)
4359 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4362 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4363 unsigned int locsym_index
)
4364 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4367 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4369 unsigned int r_type
,
4371 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4374 this->addend_
= addend
;
4375 else if (parameters
->options().output_is_position_independent()
4376 && r_type
== elfcpp::R_PPC_PLTREL24
)
4378 this->addend_
= addend
;
4379 if (this->addend_
>= 32768)
4380 this->object_
= object
;
4384 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4385 unsigned int locsym_index
,
4386 unsigned int r_type
,
4388 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4391 this->addend_
= addend
;
4392 else if (parameters
->options().output_is_position_independent()
4393 && r_type
== elfcpp::R_PPC_PLTREL24
)
4394 this->addend_
= addend
;
4397 bool operator==(const Plt_stub_key
& that
) const
4399 return (this->sym_
== that
.sym_
4400 && this->object_
== that
.object_
4401 && this->addend_
== that
.addend_
4402 && this->locsym_
== that
.locsym_
);
4406 const Sized_relobj_file
<size
, big_endian
>* object_
;
4407 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4408 unsigned int locsym_
;
4411 class Plt_stub_key_hash
4414 size_t operator()(const Plt_stub_key
& ent
) const
4416 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4417 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4423 // Long branch stub keys.
4424 class Branch_stub_ent
4427 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4428 Address to
, bool save_res
)
4429 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4432 toc_base_off_
= obj
->toc_base_offset();
4435 bool operator==(const Branch_stub_ent
& that
) const
4437 return (this->dest_
== that
.dest_
4439 || this->toc_base_off_
== that
.toc_base_off_
));
4443 unsigned int toc_base_off_
;
4447 class Branch_stub_ent_hash
4450 size_t operator()(const Branch_stub_ent
& ent
) const
4451 { return ent
.dest_
^ ent
.toc_base_off_
; }
4454 // In a sane world this would be a global.
4455 Target_powerpc
<size
, big_endian
>* targ_
;
4456 // Map sym/object/addend to stub offset.
4457 Plt_stub_entries plt_call_stubs_
;
4458 // Map destination address to stub offset.
4459 Branch_stub_entries long_branch_stubs_
;
4460 // size of input section
4461 section_size_type orig_data_size_
;
4463 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4464 // Some rare cases cause (PR/20529) fluctuation in stub table
4465 // size, which leads to an endless relax loop. This is to be fixed
4466 // by, after the first few iterations, allowing only increase of
4467 // stub table size. This variable sets the minimal possible size of
4468 // a stub table, it is zero for the first few iterations, then
4469 // increases monotonically.
4470 Address min_size_threshold_
;
4471 // Whether .eh_frame info has been created for this stub section.
4472 bool eh_frame_added_
;
4473 // Set if this stub group needs a copy of out-of-line register
4474 // save/restore functions.
4475 bool need_save_res_
;
4476 // Per stub table unique identifier.
4480 // Add a plt call stub, if we do not already have one for this
4481 // sym/object/addend combo.
4483 template<int size
, bool big_endian
>
4485 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4487 const Sized_relobj_file
<size
, big_endian
>* object
,
4489 unsigned int r_type
,
4493 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4494 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4495 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4496 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4499 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4501 && this->targ_
->is_elfv2_localentry0(gsym
))
4503 p
.first
->second
.localentry0_
= 1;
4504 this->targ_
->set_has_localentry0();
4509 && !p
.first
->second
.localentry0_
)
4510 p
.first
->second
.r2save_
= 1;
4511 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4514 template<int size
, bool big_endian
>
4516 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4518 const Sized_relobj_file
<size
, big_endian
>* object
,
4519 unsigned int locsym_index
,
4520 unsigned int r_type
,
4524 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4525 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4526 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4527 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4530 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4532 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4534 p
.first
->second
.localentry0_
= 1;
4535 this->targ_
->set_has_localentry0();
4540 && !p
.first
->second
.localentry0_
)
4541 p
.first
->second
.r2save_
= 1;
4542 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4545 // Find a plt call stub.
4547 template<int size
, bool big_endian
>
4548 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4549 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4550 const Sized_relobj_file
<size
, big_endian
>* object
,
4552 unsigned int r_type
,
4553 Address addend
) const
4555 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4556 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4557 if (p
== this->plt_call_stubs_
.end())
4562 template<int size
, bool big_endian
>
4563 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4564 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4566 Plt_stub_key
key(gsym
);
4567 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4568 if (p
== this->plt_call_stubs_
.end())
4573 template<int size
, bool big_endian
>
4574 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4575 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4576 const Sized_relobj_file
<size
, big_endian
>* object
,
4577 unsigned int locsym_index
,
4578 unsigned int r_type
,
4579 Address addend
) const
4581 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4582 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4583 if (p
== this->plt_call_stubs_
.end())
4588 template<int size
, bool big_endian
>
4589 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4590 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4591 const Sized_relobj_file
<size
, big_endian
>* object
,
4592 unsigned int locsym_index
) const
4594 Plt_stub_key
key(object
, locsym_index
);
4595 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4596 if (p
== this->plt_call_stubs_
.end())
4601 // Add a long branch stub if we don't already have one to given
4604 template<int size
, bool big_endian
>
4606 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4607 const Powerpc_relobj
<size
, big_endian
>* object
,
4608 unsigned int r_type
,
4613 Branch_stub_ent
ent(object
, to
, save_res
);
4614 Address off
= this->branch_size_
;
4615 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
4616 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
4620 this->need_save_res_
= true;
4623 unsigned int stub_size
= this->branch_stub_size(p
.first
);
4624 this->branch_size_
= off
+ stub_size
;
4625 if (size
== 64 && stub_size
!= 4)
4626 this->targ_
->add_branch_lookup_table(to
);
4629 return this->can_reach_stub(from
, off
, r_type
);
4632 // Find long branch stub offset.
4634 template<int size
, bool big_endian
>
4635 typename Stub_table
<size
, big_endian
>::Address
4636 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4637 const Powerpc_relobj
<size
, big_endian
>* object
,
4640 Branch_stub_ent
ent(object
, to
, false);
4641 typename
Branch_stub_entries::const_iterator p
4642 = this->long_branch_stubs_
.find(ent
);
4643 if (p
== this->long_branch_stubs_
.end())
4644 return invalid_address
;
4645 if (p
->first
.save_res_
)
4646 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4650 // A class to handle .glink.
4652 template<int size
, bool big_endian
>
4653 class Output_data_glink
: public Output_section_data
4656 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4657 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4658 static const int pltresolve_size
= 16*4;
4660 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4661 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4662 end_branch_table_(), ge_size_(0)
4666 add_eh_frame(Layout
* layout
);
4669 add_global_entry(const Symbol
*);
4672 find_global_entry(const Symbol
*) const;
4675 global_entry_address() const
4677 gold_assert(this->is_data_size_valid());
4678 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4679 return this->address() + global_entry_off
;
4683 // Write to a map file.
4685 do_print_to_mapfile(Mapfile
* mapfile
) const
4686 { mapfile
->print_output_data(this, _("** glink")); }
4690 set_final_data_size();
4694 do_write(Output_file
*);
4696 // Allows access to .got and .plt for do_write.
4697 Target_powerpc
<size
, big_endian
>* targ_
;
4699 // Map sym to stub offset.
4700 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4701 Global_entry_stub_entries global_entry_stubs_
;
4703 unsigned int end_branch_table_
, ge_size_
;
4706 template<int size
, bool big_endian
>
4708 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4710 if (!parameters
->options().ld_generated_unwind_info())
4715 if (this->targ_
->abiversion() < 2)
4716 layout
->add_eh_frame_for_plt(this,
4717 Eh_cie
<64>::eh_frame_cie
,
4718 sizeof (Eh_cie
<64>::eh_frame_cie
),
4719 glink_eh_frame_fde_64v1
,
4720 sizeof (glink_eh_frame_fde_64v1
));
4722 layout
->add_eh_frame_for_plt(this,
4723 Eh_cie
<64>::eh_frame_cie
,
4724 sizeof (Eh_cie
<64>::eh_frame_cie
),
4725 glink_eh_frame_fde_64v2
,
4726 sizeof (glink_eh_frame_fde_64v2
));
4730 // 32-bit .glink can use the default since the CIE return
4731 // address reg, LR, is valid.
4732 layout
->add_eh_frame_for_plt(this,
4733 Eh_cie
<32>::eh_frame_cie
,
4734 sizeof (Eh_cie
<32>::eh_frame_cie
),
4736 sizeof (default_fde
));
4737 // Except where LR is used in a PIC __glink_PLTresolve.
4738 if (parameters
->options().output_is_position_independent())
4739 layout
->add_eh_frame_for_plt(this,
4740 Eh_cie
<32>::eh_frame_cie
,
4741 sizeof (Eh_cie
<32>::eh_frame_cie
),
4742 glink_eh_frame_fde_32
,
4743 sizeof (glink_eh_frame_fde_32
));
4747 template<int size
, bool big_endian
>
4749 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4751 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4752 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4754 this->ge_size_
+= 16;
4757 template<int size
, bool big_endian
>
4758 typename Output_data_glink
<size
, big_endian
>::Address
4759 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4761 typename
Global_entry_stub_entries::const_iterator p
4762 = this->global_entry_stubs_
.find(gsym
);
4763 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4766 template<int size
, bool big_endian
>
4768 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4770 unsigned int count
= this->targ_
->plt_entry_count();
4771 section_size_type total
= 0;
4777 // space for branch table
4778 total
+= 4 * (count
- 1);
4780 total
+= -total
& 15;
4781 total
+= this->pltresolve_size
;
4785 total
+= this->pltresolve_size
;
4787 // space for branch table
4789 if (this->targ_
->abiversion() < 2)
4793 total
+= 4 * (count
- 0x8000);
4797 this->end_branch_table_
= total
;
4798 total
= (total
+ 15) & -16;
4799 total
+= this->ge_size_
;
4801 this->set_data_size(total
);
4804 // Define symbols on stubs, identifying the stub.
4806 template<int size
, bool big_endian
>
4808 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
4810 if (!this->plt_call_stubs_
.empty())
4812 // The key for the plt call stub hash table includes addresses,
4813 // therefore traversal order depends on those addresses, which
4814 // can change between runs if gold is a PIE. Unfortunately the
4815 // output .symtab ordering depends on the order in which symbols
4816 // are added to the linker symtab. We want reproducible output
4817 // so must sort the call stub symbols.
4818 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
4819 std::vector
<plt_iter
> sorted
;
4820 sorted
.resize(this->plt_call_stubs_
.size());
4822 for (plt_iter cs
= this->plt_call_stubs_
.begin();
4823 cs
!= this->plt_call_stubs_
.end();
4825 sorted
[cs
->second
.indx_
] = cs
;
4827 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
4829 plt_iter cs
= sorted
[i
];
4832 if (cs
->first
.addend_
!= 0)
4833 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
4836 if (cs
->first
.object_
)
4838 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4839 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4840 sprintf(obj
, "%x:", ppcobj
->uniq());
4843 const char *symname
;
4844 if (cs
->first
.sym_
== NULL
)
4846 sprintf(localname
, "%x", cs
->first
.locsym_
);
4847 symname
= localname
;
4850 symname
= cs
->first
.sym_
->name();
4851 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
4852 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
4854 = this->stub_address() - this->address() + cs
->second
.off_
;
4855 unsigned int stub_size
= this->plt_call_size(cs
);
4856 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
4860 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
4861 for (branch_iter bs
= this->long_branch_stubs_
.begin();
4862 bs
!= this->long_branch_stubs_
.end();
4865 if (bs
->first
.save_res_
)
4868 char* name
= new char[8 + 13 + 16 + 1];
4869 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
4870 static_cast<unsigned long long>(bs
->first
.dest_
));
4871 Address value
= (this->stub_address() - this->address()
4872 + this->plt_size_
+ bs
->second
);
4873 unsigned int stub_size
= this->branch_stub_size(bs
);
4874 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
4878 // Write out plt and long branch stub code.
4880 template<int size
, bool big_endian
>
4882 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4884 if (this->plt_call_stubs_
.empty()
4885 && this->long_branch_stubs_
.empty())
4888 const section_size_type start_off
= this->offset();
4889 const section_size_type off
= this->stub_offset();
4890 const section_size_type oview_size
=
4891 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4892 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4897 const Output_data_got_powerpc
<size
, big_endian
>* got
4898 = this->targ_
->got_section();
4899 Address got_os_addr
= got
->output_section()->address();
4901 if (!this->plt_call_stubs_
.empty())
4903 // The base address of the .plt section.
4904 Address plt_base
= this->targ_
->plt_section()->address();
4905 Address iplt_base
= invalid_address
;
4907 // Write out plt call stubs.
4908 typename
Plt_stub_entries::const_iterator cs
;
4909 for (cs
= this->plt_call_stubs_
.begin();
4910 cs
!= this->plt_call_stubs_
.end();
4914 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4915 Address plt_addr
= pltoff
;
4918 if (iplt_base
== invalid_address
)
4919 iplt_base
= this->targ_
->iplt_section()->address();
4920 plt_addr
+= iplt_base
;
4923 plt_addr
+= plt_base
;
4924 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4925 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4926 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4927 Address off
= plt_addr
- got_addr
;
4929 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4930 gold_error(_("%s: linkage table error against `%s'"),
4931 cs
->first
.object_
->name().c_str(),
4932 cs
->first
.sym_
->demangled_name().c_str());
4934 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4936 = plt_load_toc
&& parameters
->options().plt_static_chain();
4938 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4939 bool use_fake_dep
= false;
4940 Address cmp_branch_off
= 0;
4943 unsigned int pltindex
4944 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4945 / this->targ_
->plt_entry_size());
4947 = (this->targ_
->glink_section()->pltresolve_size
4949 if (pltindex
> 32768)
4950 glinkoff
+= (pltindex
- 32768) * 4;
4952 = this->targ_
->glink_section()->address() + glinkoff
;
4954 = (this->stub_address() + cs
->second
.off_
+ 20
4955 + 4 * cs
->second
.r2save_
4956 + 4 * (ha(off
) != 0)
4957 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4958 + 4 * static_chain
);
4959 cmp_branch_off
= to
- from
;
4960 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4963 p
= oview
+ cs
->second
.off_
;
4966 if (cs
->second
.r2save_
)
4968 write_insn
<big_endian
>(p
,
4969 std_2_1
+ this->targ_
->stk_toc());
4974 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4976 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4981 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4983 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4987 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4989 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4993 write_insn
<big_endian
>(p
, mtctr_12
);
4999 write_insn
<big_endian
>(p
, xor_2_12_12
);
5001 write_insn
<big_endian
>(p
, add_11_11_2
);
5004 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5008 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5015 if (cs
->second
.r2save_
)
5017 write_insn
<big_endian
>(p
,
5018 std_2_1
+ this->targ_
->stk_toc());
5021 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5024 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5026 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5030 write_insn
<big_endian
>(p
, mtctr_12
);
5036 write_insn
<big_endian
>(p
, xor_11_12_12
);
5038 write_insn
<big_endian
>(p
, add_2_2_11
);
5043 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5046 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5050 if (thread_safe
&& !use_fake_dep
)
5052 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5054 write_insn
<big_endian
>(p
, bnectr_p4
);
5056 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5059 write_insn
<big_endian
>(p
, bctr
);
5063 // Write out long branch stubs.
5064 typename
Branch_stub_entries::const_iterator bs
;
5065 for (bs
= this->long_branch_stubs_
.begin();
5066 bs
!= this->long_branch_stubs_
.end();
5069 if (bs
->first
.save_res_
)
5071 p
= oview
+ this->plt_size_
+ bs
->second
;
5072 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5073 Address delta
= bs
->first
.dest_
- loc
;
5074 if (delta
+ (1 << 25) < 2 << 25)
5075 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5079 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5080 gold_assert(brlt_addr
!= invalid_address
);
5081 brlt_addr
+= this->targ_
->brlt_section()->address();
5082 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5083 Address brltoff
= brlt_addr
- got_addr
;
5084 if (ha(brltoff
) == 0)
5086 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5090 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5091 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5093 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5094 write_insn
<big_endian
>(p
, bctr
);
5100 if (!this->plt_call_stubs_
.empty())
5102 // The base address of the .plt section.
5103 Address plt_base
= this->targ_
->plt_section()->address();
5104 Address iplt_base
= invalid_address
;
5105 // The address of _GLOBAL_OFFSET_TABLE_.
5106 Address g_o_t
= invalid_address
;
5108 // Write out plt call stubs.
5109 typename
Plt_stub_entries::const_iterator cs
;
5110 for (cs
= this->plt_call_stubs_
.begin();
5111 cs
!= this->plt_call_stubs_
.end();
5115 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
5118 if (iplt_base
== invalid_address
)
5119 iplt_base
= this->targ_
->iplt_section()->address();
5120 plt_addr
+= iplt_base
;
5123 plt_addr
+= plt_base
;
5125 p
= oview
+ cs
->second
.off_
;
5126 if (parameters
->options().output_is_position_independent())
5129 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5130 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5131 (cs
->first
.object_
));
5132 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5134 unsigned int got2
= ppcobj
->got2_shndx();
5135 got_addr
= ppcobj
->get_output_section_offset(got2
);
5136 gold_assert(got_addr
!= invalid_address
);
5137 got_addr
+= (ppcobj
->output_section(got2
)->address()
5138 + cs
->first
.addend_
);
5142 if (g_o_t
== invalid_address
)
5144 const Output_data_got_powerpc
<size
, big_endian
>* got
5145 = this->targ_
->got_section();
5146 g_o_t
= got
->address() + got
->g_o_t();
5151 Address off
= plt_addr
- got_addr
;
5154 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
5155 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
5156 write_insn
<big_endian
>(p
+ 8, bctr
);
5160 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
5161 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
5162 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
5163 write_insn
<big_endian
>(p
+ 12, bctr
);
5168 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
5169 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
5170 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
5171 write_insn
<big_endian
>(p
+ 12, bctr
);
5176 // Write out long branch stubs.
5177 typename
Branch_stub_entries::const_iterator bs
;
5178 for (bs
= this->long_branch_stubs_
.begin();
5179 bs
!= this->long_branch_stubs_
.end();
5182 if (bs
->first
.save_res_
)
5184 p
= oview
+ this->plt_size_
+ bs
->second
;
5185 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5186 Address delta
= bs
->first
.dest_
- loc
;
5187 if (delta
+ (1 << 25) < 2 << 25)
5188 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5189 else if (!parameters
->options().output_is_position_independent())
5191 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
5192 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
5193 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
5194 write_insn
<big_endian
>(p
+ 12, bctr
);
5199 write_insn
<big_endian
>(p
+ 0, mflr_0
);
5200 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
5201 write_insn
<big_endian
>(p
+ 8, mflr_12
);
5202 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
5203 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
5204 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5205 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
5206 write_insn
<big_endian
>(p
+ 28, bctr
);
5210 if (this->need_save_res_
)
5212 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5213 memcpy (p
, this->targ_
->savres_section()->contents(),
5214 this->targ_
->savres_section()->data_size());
5218 // Write out .glink.
5220 template<int size
, bool big_endian
>
5222 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5224 const section_size_type off
= this->offset();
5225 const section_size_type oview_size
=
5226 convert_to_section_size_type(this->data_size());
5227 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5230 // The base address of the .plt section.
5231 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5232 Address plt_base
= this->targ_
->plt_section()->address();
5236 if (this->end_branch_table_
!= 0)
5238 // Write pltresolve stub.
5240 Address after_bcl
= this->address() + 16;
5241 Address pltoff
= plt_base
- after_bcl
;
5243 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5245 if (this->targ_
->abiversion() < 2)
5247 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5248 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5249 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5250 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5251 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5252 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5253 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5254 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5255 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5256 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5260 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5261 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5262 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5263 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5264 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5265 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5266 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5267 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5268 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5269 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5270 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5271 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5272 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5274 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5275 while (p
< oview
+ this->pltresolve_size
)
5276 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5278 // Write lazy link call stubs.
5280 while (p
< oview
+ this->end_branch_table_
)
5282 if (this->targ_
->abiversion() < 2)
5286 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5290 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5291 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5294 uint32_t branch_off
= 8 - (p
- oview
);
5295 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5300 Address plt_base
= this->targ_
->plt_section()->address();
5301 Address iplt_base
= invalid_address
;
5302 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
5303 Address global_entry_base
= this->address() + global_entry_off
;
5304 typename
Global_entry_stub_entries::const_iterator ge
;
5305 for (ge
= this->global_entry_stubs_
.begin();
5306 ge
!= this->global_entry_stubs_
.end();
5309 p
= oview
+ global_entry_off
+ ge
->second
;
5310 Address plt_addr
= ge
->first
->plt_offset();
5311 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5312 && ge
->first
->can_use_relative_reloc(false))
5314 if (iplt_base
== invalid_address
)
5315 iplt_base
= this->targ_
->iplt_section()->address();
5316 plt_addr
+= iplt_base
;
5319 plt_addr
+= plt_base
;
5320 Address my_addr
= global_entry_base
+ ge
->second
;
5321 Address off
= plt_addr
- my_addr
;
5323 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5324 gold_error(_("%s: linkage table error against `%s'"),
5325 ge
->first
->object()->name().c_str(),
5326 ge
->first
->demangled_name().c_str());
5328 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5329 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5330 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5331 write_insn
<big_endian
>(p
, bctr
);
5336 const Output_data_got_powerpc
<size
, big_endian
>* got
5337 = this->targ_
->got_section();
5338 // The address of _GLOBAL_OFFSET_TABLE_.
5339 Address g_o_t
= got
->address() + got
->g_o_t();
5341 // Write out pltresolve branch table.
5343 unsigned int the_end
= oview_size
- this->pltresolve_size
;
5344 unsigned char* end_p
= oview
+ the_end
;
5345 while (p
< end_p
- 8 * 4)
5346 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5348 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5350 // Write out pltresolve call stub.
5351 if (parameters
->options().output_is_position_independent())
5353 Address res0_off
= 0;
5354 Address after_bcl_off
= the_end
+ 12;
5355 Address bcl_res0
= after_bcl_off
- res0_off
;
5357 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
5358 write_insn
<big_endian
>(p
+ 4, mflr_0
);
5359 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
5360 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
5361 write_insn
<big_endian
>(p
+ 16, mflr_12
);
5362 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
5363 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
5365 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5367 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
5368 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5370 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
5371 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
5375 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
5376 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
5378 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
5379 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
5380 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
5381 write_insn
<big_endian
>(p
+ 52, bctr
);
5382 write_insn
<big_endian
>(p
+ 56, nop
);
5383 write_insn
<big_endian
>(p
+ 60, nop
);
5387 Address res0
= this->address();
5389 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
5390 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
5391 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5392 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
5394 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
5395 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
5396 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
5397 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
5398 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5399 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
5401 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
5402 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
5403 write_insn
<big_endian
>(p
+ 32, bctr
);
5404 write_insn
<big_endian
>(p
+ 36, nop
);
5405 write_insn
<big_endian
>(p
+ 40, nop
);
5406 write_insn
<big_endian
>(p
+ 44, nop
);
5407 write_insn
<big_endian
>(p
+ 48, nop
);
5408 write_insn
<big_endian
>(p
+ 52, nop
);
5409 write_insn
<big_endian
>(p
+ 56, nop
);
5410 write_insn
<big_endian
>(p
+ 60, nop
);
5415 of
->write_output_view(off
, oview_size
, oview
);
5419 // A class to handle linker generated save/restore functions.
5421 template<int size
, bool big_endian
>
5422 class Output_data_save_res
: public Output_section_data_build
5425 Output_data_save_res(Symbol_table
* symtab
);
5427 const unsigned char*
5434 // Write to a map file.
5436 do_print_to_mapfile(Mapfile
* mapfile
) const
5437 { mapfile
->print_output_data(this, _("** save/restore")); }
5440 do_write(Output_file
*);
5443 // The maximum size of save/restore contents.
5444 static const unsigned int savres_max
= 218*4;
5447 savres_define(Symbol_table
* symtab
,
5449 unsigned int lo
, unsigned int hi
,
5450 unsigned char* write_ent(unsigned char*, int),
5451 unsigned char* write_tail(unsigned char*, int));
5453 unsigned char *contents_
;
5456 template<bool big_endian
>
5457 static unsigned char*
5458 savegpr0(unsigned char* p
, int r
)
5460 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5461 write_insn
<big_endian
>(p
, insn
);
5465 template<bool big_endian
>
5466 static unsigned char*
5467 savegpr0_tail(unsigned char* p
, int r
)
5469 p
= savegpr0
<big_endian
>(p
, r
);
5470 uint32_t insn
= std_0_1
+ 16;
5471 write_insn
<big_endian
>(p
, insn
);
5473 write_insn
<big_endian
>(p
, blr
);
5477 template<bool big_endian
>
5478 static unsigned char*
5479 restgpr0(unsigned char* p
, int r
)
5481 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5482 write_insn
<big_endian
>(p
, insn
);
5486 template<bool big_endian
>
5487 static unsigned char*
5488 restgpr0_tail(unsigned char* p
, int r
)
5490 uint32_t insn
= ld_0_1
+ 16;
5491 write_insn
<big_endian
>(p
, insn
);
5493 p
= restgpr0
<big_endian
>(p
, r
);
5494 write_insn
<big_endian
>(p
, mtlr_0
);
5498 p
= restgpr0
<big_endian
>(p
, 30);
5499 p
= restgpr0
<big_endian
>(p
, 31);
5501 write_insn
<big_endian
>(p
, blr
);
5505 template<bool big_endian
>
5506 static unsigned char*
5507 savegpr1(unsigned char* p
, int r
)
5509 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5510 write_insn
<big_endian
>(p
, insn
);
5514 template<bool big_endian
>
5515 static unsigned char*
5516 savegpr1_tail(unsigned char* p
, int r
)
5518 p
= savegpr1
<big_endian
>(p
, r
);
5519 write_insn
<big_endian
>(p
, blr
);
5523 template<bool big_endian
>
5524 static unsigned char*
5525 restgpr1(unsigned char* p
, int r
)
5527 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5528 write_insn
<big_endian
>(p
, insn
);
5532 template<bool big_endian
>
5533 static unsigned char*
5534 restgpr1_tail(unsigned char* p
, int r
)
5536 p
= restgpr1
<big_endian
>(p
, r
);
5537 write_insn
<big_endian
>(p
, blr
);
5541 template<bool big_endian
>
5542 static unsigned char*
5543 savefpr(unsigned char* p
, int r
)
5545 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5546 write_insn
<big_endian
>(p
, insn
);
5550 template<bool big_endian
>
5551 static unsigned char*
5552 savefpr0_tail(unsigned char* p
, int r
)
5554 p
= savefpr
<big_endian
>(p
, r
);
5555 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5557 write_insn
<big_endian
>(p
, blr
);
5561 template<bool big_endian
>
5562 static unsigned char*
5563 restfpr(unsigned char* p
, int r
)
5565 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5566 write_insn
<big_endian
>(p
, insn
);
5570 template<bool big_endian
>
5571 static unsigned char*
5572 restfpr0_tail(unsigned char* p
, int r
)
5574 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5576 p
= restfpr
<big_endian
>(p
, r
);
5577 write_insn
<big_endian
>(p
, mtlr_0
);
5581 p
= restfpr
<big_endian
>(p
, 30);
5582 p
= restfpr
<big_endian
>(p
, 31);
5584 write_insn
<big_endian
>(p
, blr
);
5588 template<bool big_endian
>
5589 static unsigned char*
5590 savefpr1_tail(unsigned char* p
, int r
)
5592 p
= savefpr
<big_endian
>(p
, r
);
5593 write_insn
<big_endian
>(p
, blr
);
5597 template<bool big_endian
>
5598 static unsigned char*
5599 restfpr1_tail(unsigned char* p
, int r
)
5601 p
= restfpr
<big_endian
>(p
, r
);
5602 write_insn
<big_endian
>(p
, blr
);
5606 template<bool big_endian
>
5607 static unsigned char*
5608 savevr(unsigned char* p
, int r
)
5610 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5611 write_insn
<big_endian
>(p
, insn
);
5613 insn
= stvx_0_12_0
+ (r
<< 21);
5614 write_insn
<big_endian
>(p
, insn
);
5618 template<bool big_endian
>
5619 static unsigned char*
5620 savevr_tail(unsigned char* p
, int r
)
5622 p
= savevr
<big_endian
>(p
, r
);
5623 write_insn
<big_endian
>(p
, blr
);
5627 template<bool big_endian
>
5628 static unsigned char*
5629 restvr(unsigned char* p
, int r
)
5631 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5632 write_insn
<big_endian
>(p
, insn
);
5634 insn
= lvx_0_12_0
+ (r
<< 21);
5635 write_insn
<big_endian
>(p
, insn
);
5639 template<bool big_endian
>
5640 static unsigned char*
5641 restvr_tail(unsigned char* p
, int r
)
5643 p
= restvr
<big_endian
>(p
, r
);
5644 write_insn
<big_endian
>(p
, blr
);
5649 template<int size
, bool big_endian
>
5650 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5651 Symbol_table
* symtab
)
5652 : Output_section_data_build(4),
5655 this->savres_define(symtab
,
5656 "_savegpr0_", 14, 31,
5657 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5658 this->savres_define(symtab
,
5659 "_restgpr0_", 14, 29,
5660 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5661 this->savres_define(symtab
,
5662 "_restgpr0_", 30, 31,
5663 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5664 this->savres_define(symtab
,
5665 "_savegpr1_", 14, 31,
5666 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5667 this->savres_define(symtab
,
5668 "_restgpr1_", 14, 31,
5669 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5670 this->savres_define(symtab
,
5671 "_savefpr_", 14, 31,
5672 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5673 this->savres_define(symtab
,
5674 "_restfpr_", 14, 29,
5675 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5676 this->savres_define(symtab
,
5677 "_restfpr_", 30, 31,
5678 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5679 this->savres_define(symtab
,
5681 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5682 this->savres_define(symtab
,
5684 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5685 this->savres_define(symtab
,
5687 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5688 this->savres_define(symtab
,
5690 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5693 template<int size
, bool big_endian
>
5695 Output_data_save_res
<size
, big_endian
>::savres_define(
5696 Symbol_table
* symtab
,
5698 unsigned int lo
, unsigned int hi
,
5699 unsigned char* write_ent(unsigned char*, int),
5700 unsigned char* write_tail(unsigned char*, int))
5702 size_t len
= strlen(name
);
5703 bool writing
= false;
5706 memcpy(sym
, name
, len
);
5709 for (unsigned int i
= lo
; i
<= hi
; i
++)
5711 sym
[len
+ 0] = i
/ 10 + '0';
5712 sym
[len
+ 1] = i
% 10 + '0';
5713 Symbol
* gsym
= symtab
->lookup(sym
);
5714 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5715 writing
= writing
|| refd
;
5718 if (this->contents_
== NULL
)
5719 this->contents_
= new unsigned char[this->savres_max
];
5721 section_size_type value
= this->current_data_size();
5722 unsigned char* p
= this->contents_
+ value
;
5724 p
= write_ent(p
, i
);
5726 p
= write_tail(p
, i
);
5727 section_size_type cur_size
= p
- this->contents_
;
5728 this->set_current_data_size(cur_size
);
5730 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5731 this, value
, cur_size
- value
,
5732 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5733 elfcpp::STV_HIDDEN
, 0, false, false);
5738 // Write out save/restore.
5740 template<int size
, bool big_endian
>
5742 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5744 const section_size_type off
= this->offset();
5745 const section_size_type oview_size
=
5746 convert_to_section_size_type(this->data_size());
5747 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5748 memcpy(oview
, this->contents_
, oview_size
);
5749 of
->write_output_view(off
, oview_size
, oview
);
5753 // Create the glink section.
5755 template<int size
, bool big_endian
>
5757 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5759 if (this->glink_
== NULL
)
5761 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5762 this->glink_
->add_eh_frame(layout
);
5763 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5764 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5765 this->glink_
, ORDER_TEXT
, false);
5769 // Create a PLT entry for a global symbol.
5771 template<int size
, bool big_endian
>
5773 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5777 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5778 && gsym
->can_use_relative_reloc(false))
5780 if (this->iplt_
== NULL
)
5781 this->make_iplt_section(symtab
, layout
);
5782 this->iplt_
->add_ifunc_entry(gsym
);
5786 if (this->plt_
== NULL
)
5787 this->make_plt_section(symtab
, layout
);
5788 this->plt_
->add_entry(gsym
);
5792 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5794 template<int size
, bool big_endian
>
5796 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5797 Symbol_table
* symtab
,
5799 Sized_relobj_file
<size
, big_endian
>* relobj
,
5802 if (this->iplt_
== NULL
)
5803 this->make_iplt_section(symtab
, layout
);
5804 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5807 // Return the number of entries in the PLT.
5809 template<int size
, bool big_endian
>
5811 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5813 if (this->plt_
== NULL
)
5815 return this->plt_
->entry_count();
5818 // Create a GOT entry for local dynamic __tls_get_addr calls.
5820 template<int size
, bool big_endian
>
5822 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5823 Symbol_table
* symtab
,
5825 Sized_relobj_file
<size
, big_endian
>* object
)
5827 if (this->tlsld_got_offset_
== -1U)
5829 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5830 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5831 Output_data_got_powerpc
<size
, big_endian
>* got
5832 = this->got_section(symtab
, layout
);
5833 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5834 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5836 this->tlsld_got_offset_
= got_offset
;
5838 return this->tlsld_got_offset_
;
5841 // Get the Reference_flags for a particular relocation.
5843 template<int size
, bool big_endian
>
5845 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5846 unsigned int r_type
,
5847 const Target_powerpc
* target
)
5853 case elfcpp::R_POWERPC_NONE
:
5854 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5855 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5856 case elfcpp::R_PPC64_TOC
:
5857 // No symbol reference.
5860 case elfcpp::R_PPC64_ADDR64
:
5861 case elfcpp::R_PPC64_UADDR64
:
5862 case elfcpp::R_POWERPC_ADDR32
:
5863 case elfcpp::R_POWERPC_UADDR32
:
5864 case elfcpp::R_POWERPC_ADDR16
:
5865 case elfcpp::R_POWERPC_UADDR16
:
5866 case elfcpp::R_POWERPC_ADDR16_LO
:
5867 case elfcpp::R_POWERPC_ADDR16_HI
:
5868 case elfcpp::R_POWERPC_ADDR16_HA
:
5869 ref
= Symbol::ABSOLUTE_REF
;
5872 case elfcpp::R_POWERPC_ADDR24
:
5873 case elfcpp::R_POWERPC_ADDR14
:
5874 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5875 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5876 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5879 case elfcpp::R_PPC64_REL64
:
5880 case elfcpp::R_POWERPC_REL32
:
5881 case elfcpp::R_PPC_LOCAL24PC
:
5882 case elfcpp::R_POWERPC_REL16
:
5883 case elfcpp::R_POWERPC_REL16_LO
:
5884 case elfcpp::R_POWERPC_REL16_HI
:
5885 case elfcpp::R_POWERPC_REL16_HA
:
5886 ref
= Symbol::RELATIVE_REF
;
5889 case elfcpp::R_POWERPC_REL24
:
5890 case elfcpp::R_PPC_PLTREL24
:
5891 case elfcpp::R_POWERPC_REL14
:
5892 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5893 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5894 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5897 case elfcpp::R_POWERPC_GOT16
:
5898 case elfcpp::R_POWERPC_GOT16_LO
:
5899 case elfcpp::R_POWERPC_GOT16_HI
:
5900 case elfcpp::R_POWERPC_GOT16_HA
:
5901 case elfcpp::R_PPC64_GOT16_DS
:
5902 case elfcpp::R_PPC64_GOT16_LO_DS
:
5903 case elfcpp::R_PPC64_TOC16
:
5904 case elfcpp::R_PPC64_TOC16_LO
:
5905 case elfcpp::R_PPC64_TOC16_HI
:
5906 case elfcpp::R_PPC64_TOC16_HA
:
5907 case elfcpp::R_PPC64_TOC16_DS
:
5908 case elfcpp::R_PPC64_TOC16_LO_DS
:
5909 ref
= Symbol::RELATIVE_REF
;
5912 case elfcpp::R_POWERPC_GOT_TPREL16
:
5913 case elfcpp::R_POWERPC_TLS
:
5914 ref
= Symbol::TLS_REF
;
5917 case elfcpp::R_POWERPC_COPY
:
5918 case elfcpp::R_POWERPC_GLOB_DAT
:
5919 case elfcpp::R_POWERPC_JMP_SLOT
:
5920 case elfcpp::R_POWERPC_RELATIVE
:
5921 case elfcpp::R_POWERPC_DTPMOD
:
5923 // Not expected. We will give an error later.
5927 if (size
== 64 && target
->abiversion() < 2)
5928 ref
|= Symbol::FUNC_DESC_ABI
;
5932 // Report an unsupported relocation against a local symbol.
5934 template<int size
, bool big_endian
>
5936 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5937 Sized_relobj_file
<size
, big_endian
>* object
,
5938 unsigned int r_type
)
5940 gold_error(_("%s: unsupported reloc %u against local symbol"),
5941 object
->name().c_str(), r_type
);
5944 // We are about to emit a dynamic relocation of type R_TYPE. If the
5945 // dynamic linker does not support it, issue an error.
5947 template<int size
, bool big_endian
>
5949 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5950 unsigned int r_type
)
5952 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5954 // These are the relocation types supported by glibc for both 32-bit
5955 // and 64-bit powerpc.
5958 case elfcpp::R_POWERPC_NONE
:
5959 case elfcpp::R_POWERPC_RELATIVE
:
5960 case elfcpp::R_POWERPC_GLOB_DAT
:
5961 case elfcpp::R_POWERPC_DTPMOD
:
5962 case elfcpp::R_POWERPC_DTPREL
:
5963 case elfcpp::R_POWERPC_TPREL
:
5964 case elfcpp::R_POWERPC_JMP_SLOT
:
5965 case elfcpp::R_POWERPC_COPY
:
5966 case elfcpp::R_POWERPC_IRELATIVE
:
5967 case elfcpp::R_POWERPC_ADDR32
:
5968 case elfcpp::R_POWERPC_UADDR32
:
5969 case elfcpp::R_POWERPC_ADDR24
:
5970 case elfcpp::R_POWERPC_ADDR16
:
5971 case elfcpp::R_POWERPC_UADDR16
:
5972 case elfcpp::R_POWERPC_ADDR16_LO
:
5973 case elfcpp::R_POWERPC_ADDR16_HI
:
5974 case elfcpp::R_POWERPC_ADDR16_HA
:
5975 case elfcpp::R_POWERPC_ADDR14
:
5976 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5977 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5978 case elfcpp::R_POWERPC_REL32
:
5979 case elfcpp::R_POWERPC_REL24
:
5980 case elfcpp::R_POWERPC_TPREL16
:
5981 case elfcpp::R_POWERPC_TPREL16_LO
:
5982 case elfcpp::R_POWERPC_TPREL16_HI
:
5983 case elfcpp::R_POWERPC_TPREL16_HA
:
5994 // These are the relocation types supported only on 64-bit.
5995 case elfcpp::R_PPC64_ADDR64
:
5996 case elfcpp::R_PPC64_UADDR64
:
5997 case elfcpp::R_PPC64_JMP_IREL
:
5998 case elfcpp::R_PPC64_ADDR16_DS
:
5999 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6000 case elfcpp::R_PPC64_ADDR16_HIGH
:
6001 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6002 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6003 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6004 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6005 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6006 case elfcpp::R_PPC64_REL64
:
6007 case elfcpp::R_POWERPC_ADDR30
:
6008 case elfcpp::R_PPC64_TPREL16_DS
:
6009 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6010 case elfcpp::R_PPC64_TPREL16_HIGH
:
6011 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6012 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6013 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6014 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6015 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6026 // These are the relocation types supported only on 32-bit.
6027 // ??? glibc ld.so doesn't need to support these.
6028 case elfcpp::R_POWERPC_DTPREL16
:
6029 case elfcpp::R_POWERPC_DTPREL16_LO
:
6030 case elfcpp::R_POWERPC_DTPREL16_HI
:
6031 case elfcpp::R_POWERPC_DTPREL16_HA
:
6039 // This prevents us from issuing more than one error per reloc
6040 // section. But we can still wind up issuing more than one
6041 // error per object file.
6042 if (this->issued_non_pic_error_
)
6044 gold_assert(parameters
->options().output_is_position_independent());
6045 object
->error(_("requires unsupported dynamic reloc; "
6046 "recompile with -fPIC"));
6047 this->issued_non_pic_error_
= true;
6051 // Return whether we need to make a PLT entry for a relocation of the
6052 // given type against a STT_GNU_IFUNC symbol.
6054 template<int size
, bool big_endian
>
6056 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6057 Target_powerpc
<size
, big_endian
>* target
,
6058 Sized_relobj_file
<size
, big_endian
>* object
,
6059 unsigned int r_type
,
6062 // In non-pic code any reference will resolve to the plt call stub
6063 // for the ifunc symbol.
6064 if ((size
== 32 || target
->abiversion() >= 2)
6065 && !parameters
->options().output_is_position_independent())
6070 // Word size refs from data sections are OK, but don't need a PLT entry.
6071 case elfcpp::R_POWERPC_ADDR32
:
6072 case elfcpp::R_POWERPC_UADDR32
:
6077 case elfcpp::R_PPC64_ADDR64
:
6078 case elfcpp::R_PPC64_UADDR64
:
6083 // GOT refs are good, but also don't need a PLT entry.
6084 case elfcpp::R_POWERPC_GOT16
:
6085 case elfcpp::R_POWERPC_GOT16_LO
:
6086 case elfcpp::R_POWERPC_GOT16_HI
:
6087 case elfcpp::R_POWERPC_GOT16_HA
:
6088 case elfcpp::R_PPC64_GOT16_DS
:
6089 case elfcpp::R_PPC64_GOT16_LO_DS
:
6092 // Function calls are good, and these do need a PLT entry.
6093 case elfcpp::R_POWERPC_ADDR24
:
6094 case elfcpp::R_POWERPC_ADDR14
:
6095 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6096 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6097 case elfcpp::R_POWERPC_REL24
:
6098 case elfcpp::R_PPC_PLTREL24
:
6099 case elfcpp::R_POWERPC_REL14
:
6100 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6101 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6108 // Anything else is a problem.
6109 // If we are building a static executable, the libc startup function
6110 // responsible for applying indirect function relocations is going
6111 // to complain about the reloc type.
6112 // If we are building a dynamic executable, we will have a text
6113 // relocation. The dynamic loader will set the text segment
6114 // writable and non-executable to apply text relocations. So we'll
6115 // segfault when trying to run the indirection function to resolve
6118 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6119 object
->name().c_str(), r_type
);
6123 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6127 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6129 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6130 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6131 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6132 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6133 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6134 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6135 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6136 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6137 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6138 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6139 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6140 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6141 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6142 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6143 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6144 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6145 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6146 /* Exclude lfqu by testing reloc. If relocs are ever
6147 defined for the reduced D field in psq_lu then those
6148 will need testing too. */
6149 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6150 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6151 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6153 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6154 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6155 /* Exclude stfqu. psq_stu as above for psq_lu. */
6156 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6157 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6158 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6159 && (insn
& 1) == 0));
6162 // Scan a relocation for a local symbol.
6164 template<int size
, bool big_endian
>
6166 Target_powerpc
<size
, big_endian
>::Scan::local(
6167 Symbol_table
* symtab
,
6169 Target_powerpc
<size
, big_endian
>* target
,
6170 Sized_relobj_file
<size
, big_endian
>* object
,
6171 unsigned int data_shndx
,
6172 Output_section
* output_section
,
6173 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6174 unsigned int r_type
,
6175 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6178 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
6180 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6181 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6183 this->expect_tls_get_addr_call();
6184 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6185 if (tls_type
!= tls::TLSOPT_NONE
)
6186 this->skip_next_tls_get_addr_call();
6188 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6189 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6191 this->expect_tls_get_addr_call();
6192 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6193 if (tls_type
!= tls::TLSOPT_NONE
)
6194 this->skip_next_tls_get_addr_call();
6197 Powerpc_relobj
<size
, big_endian
>* ppc_object
6198 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6203 && data_shndx
== ppc_object
->opd_shndx()
6204 && r_type
== elfcpp::R_PPC64_ADDR64
)
6205 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6209 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6210 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6211 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6213 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6214 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6215 r_type
, r_sym
, reloc
.get_r_addend());
6216 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6221 case elfcpp::R_POWERPC_NONE
:
6222 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6223 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6224 case elfcpp::R_POWERPC_TLS
:
6225 case elfcpp::R_PPC64_ENTRY
:
6228 case elfcpp::R_PPC64_TOC
:
6230 Output_data_got_powerpc
<size
, big_endian
>* got
6231 = target
->got_section(symtab
, layout
);
6232 if (parameters
->options().output_is_position_independent())
6234 Address off
= reloc
.get_r_offset();
6236 && target
->abiversion() < 2
6237 && data_shndx
== ppc_object
->opd_shndx()
6238 && ppc_object
->get_opd_discard(off
- 8))
6241 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6242 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6243 rela_dyn
->add_output_section_relative(got
->output_section(),
6244 elfcpp::R_POWERPC_RELATIVE
,
6246 object
, data_shndx
, off
,
6247 symobj
->toc_base_offset());
6252 case elfcpp::R_PPC64_ADDR64
:
6253 case elfcpp::R_PPC64_UADDR64
:
6254 case elfcpp::R_POWERPC_ADDR32
:
6255 case elfcpp::R_POWERPC_UADDR32
:
6256 case elfcpp::R_POWERPC_ADDR24
:
6257 case elfcpp::R_POWERPC_ADDR16
:
6258 case elfcpp::R_POWERPC_ADDR16_LO
:
6259 case elfcpp::R_POWERPC_ADDR16_HI
:
6260 case elfcpp::R_POWERPC_ADDR16_HA
:
6261 case elfcpp::R_POWERPC_UADDR16
:
6262 case elfcpp::R_PPC64_ADDR16_HIGH
:
6263 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6264 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6265 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6266 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6267 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6268 case elfcpp::R_PPC64_ADDR16_DS
:
6269 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6270 case elfcpp::R_POWERPC_ADDR14
:
6271 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6272 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6273 // If building a shared library (or a position-independent
6274 // executable), we need to create a dynamic relocation for
6276 if (parameters
->options().output_is_position_independent()
6277 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6279 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6281 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6282 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6283 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6285 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6286 : elfcpp::R_POWERPC_RELATIVE
);
6287 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6288 output_section
, data_shndx
,
6289 reloc
.get_r_offset(),
6290 reloc
.get_r_addend(), false);
6292 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6294 check_non_pic(object
, r_type
);
6295 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6296 data_shndx
, reloc
.get_r_offset(),
6297 reloc
.get_r_addend());
6301 gold_assert(lsym
.get_st_value() == 0);
6302 unsigned int shndx
= lsym
.get_st_shndx();
6304 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6307 object
->error(_("section symbol %u has bad shndx %u"),
6310 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6311 output_section
, data_shndx
,
6312 reloc
.get_r_offset());
6317 case elfcpp::R_POWERPC_REL24
:
6318 case elfcpp::R_PPC_PLTREL24
:
6319 case elfcpp::R_PPC_LOCAL24PC
:
6320 case elfcpp::R_POWERPC_REL14
:
6321 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6322 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6325 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6326 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6327 r_type
, r_sym
, reloc
.get_r_addend());
6331 case elfcpp::R_PPC64_TOCSAVE
:
6332 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6333 // caller has already saved r2 and thus a plt call stub need not
6336 && target
->mark_pltcall(ppc_object
, data_shndx
,
6337 reloc
.get_r_offset() - 4, symtab
))
6339 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6340 unsigned int shndx
= lsym
.get_st_shndx();
6342 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6344 object
->error(_("tocsave symbol %u has bad shndx %u"),
6347 target
->add_tocsave(ppc_object
, shndx
,
6348 lsym
.get_st_value() + reloc
.get_r_addend());
6352 case elfcpp::R_PPC64_REL64
:
6353 case elfcpp::R_POWERPC_REL32
:
6354 case elfcpp::R_POWERPC_REL16
:
6355 case elfcpp::R_POWERPC_REL16_LO
:
6356 case elfcpp::R_POWERPC_REL16_HI
:
6357 case elfcpp::R_POWERPC_REL16_HA
:
6358 case elfcpp::R_POWERPC_REL16DX_HA
:
6359 case elfcpp::R_POWERPC_SECTOFF
:
6360 case elfcpp::R_POWERPC_SECTOFF_LO
:
6361 case elfcpp::R_POWERPC_SECTOFF_HI
:
6362 case elfcpp::R_POWERPC_SECTOFF_HA
:
6363 case elfcpp::R_PPC64_SECTOFF_DS
:
6364 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6365 case elfcpp::R_POWERPC_TPREL16
:
6366 case elfcpp::R_POWERPC_TPREL16_LO
:
6367 case elfcpp::R_POWERPC_TPREL16_HI
:
6368 case elfcpp::R_POWERPC_TPREL16_HA
:
6369 case elfcpp::R_PPC64_TPREL16_DS
:
6370 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6371 case elfcpp::R_PPC64_TPREL16_HIGH
:
6372 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6373 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6374 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6375 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6376 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6377 case elfcpp::R_POWERPC_DTPREL16
:
6378 case elfcpp::R_POWERPC_DTPREL16_LO
:
6379 case elfcpp::R_POWERPC_DTPREL16_HI
:
6380 case elfcpp::R_POWERPC_DTPREL16_HA
:
6381 case elfcpp::R_PPC64_DTPREL16_DS
:
6382 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6383 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6384 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6385 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6386 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6387 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6388 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6389 case elfcpp::R_PPC64_TLSGD
:
6390 case elfcpp::R_PPC64_TLSLD
:
6391 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6394 case elfcpp::R_POWERPC_GOT16
:
6395 case elfcpp::R_POWERPC_GOT16_LO
:
6396 case elfcpp::R_POWERPC_GOT16_HI
:
6397 case elfcpp::R_POWERPC_GOT16_HA
:
6398 case elfcpp::R_PPC64_GOT16_DS
:
6399 case elfcpp::R_PPC64_GOT16_LO_DS
:
6401 // The symbol requires a GOT entry.
6402 Output_data_got_powerpc
<size
, big_endian
>* got
6403 = target
->got_section(symtab
, layout
);
6404 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6406 if (!parameters
->options().output_is_position_independent())
6409 && (size
== 32 || target
->abiversion() >= 2))
6410 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6412 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6414 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6416 // If we are generating a shared object or a pie, this
6417 // symbol's GOT entry will be set by a dynamic relocation.
6419 off
= got
->add_constant(0);
6420 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6422 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6424 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6425 : elfcpp::R_POWERPC_RELATIVE
);
6426 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6427 got
, off
, 0, false);
6432 case elfcpp::R_PPC64_TOC16
:
6433 case elfcpp::R_PPC64_TOC16_LO
:
6434 case elfcpp::R_PPC64_TOC16_HI
:
6435 case elfcpp::R_PPC64_TOC16_HA
:
6436 case elfcpp::R_PPC64_TOC16_DS
:
6437 case elfcpp::R_PPC64_TOC16_LO_DS
:
6438 // We need a GOT section.
6439 target
->got_section(symtab
, layout
);
6442 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6443 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6444 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6445 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6447 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6448 if (tls_type
== tls::TLSOPT_NONE
)
6450 Output_data_got_powerpc
<size
, big_endian
>* got
6451 = target
->got_section(symtab
, layout
);
6452 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6453 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6454 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6455 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6457 else if (tls_type
== tls::TLSOPT_TO_LE
)
6459 // no GOT relocs needed for Local Exec.
6466 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6467 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6468 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6469 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6471 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6472 if (tls_type
== tls::TLSOPT_NONE
)
6473 target
->tlsld_got_offset(symtab
, layout
, object
);
6474 else if (tls_type
== tls::TLSOPT_TO_LE
)
6476 // no GOT relocs needed for Local Exec.
6477 if (parameters
->options().emit_relocs())
6479 Output_section
* os
= layout
->tls_segment()->first_section();
6480 gold_assert(os
!= NULL
);
6481 os
->set_needs_symtab_index();
6489 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6490 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6491 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6492 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6494 Output_data_got_powerpc
<size
, big_endian
>* got
6495 = target
->got_section(symtab
, layout
);
6496 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6497 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6501 case elfcpp::R_POWERPC_GOT_TPREL16
:
6502 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6503 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6504 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6506 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6507 if (tls_type
== tls::TLSOPT_NONE
)
6509 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6510 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6512 Output_data_got_powerpc
<size
, big_endian
>* got
6513 = target
->got_section(symtab
, layout
);
6514 unsigned int off
= got
->add_constant(0);
6515 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6517 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6518 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6519 elfcpp::R_POWERPC_TPREL
,
6523 else if (tls_type
== tls::TLSOPT_TO_LE
)
6525 // no GOT relocs needed for Local Exec.
6533 unsupported_reloc_local(object
, r_type
);
6538 && parameters
->options().toc_optimize())
6540 if (data_shndx
== ppc_object
->toc_shndx())
6543 if (r_type
!= elfcpp::R_PPC64_ADDR64
6544 || (is_ifunc
&& target
->abiversion() < 2))
6546 else if (parameters
->options().output_is_position_independent())
6552 unsigned int shndx
= lsym
.get_st_shndx();
6553 if (shndx
>= elfcpp::SHN_LORESERVE
6554 && shndx
!= elfcpp::SHN_XINDEX
)
6559 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6562 enum {no_check
, check_lo
, check_ha
} insn_check
;
6566 insn_check
= no_check
;
6569 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6570 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6571 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6572 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6573 case elfcpp::R_POWERPC_GOT16_HA
:
6574 case elfcpp::R_PPC64_TOC16_HA
:
6575 insn_check
= check_ha
;
6578 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6579 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6580 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6581 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6582 case elfcpp::R_POWERPC_GOT16_LO
:
6583 case elfcpp::R_PPC64_GOT16_LO_DS
:
6584 case elfcpp::R_PPC64_TOC16_LO
:
6585 case elfcpp::R_PPC64_TOC16_LO_DS
:
6586 insn_check
= check_lo
;
6590 section_size_type slen
;
6591 const unsigned char* view
= NULL
;
6592 if (insn_check
!= no_check
)
6594 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6595 section_size_type off
=
6596 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6599 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6600 if (insn_check
== check_lo
6601 ? !ok_lo_toc_insn(insn
, r_type
)
6602 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6603 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6605 ppc_object
->set_no_toc_opt();
6606 gold_warning(_("%s: toc optimization is not supported "
6607 "for %#08x instruction"),
6608 ppc_object
->name().c_str(), insn
);
6617 case elfcpp::R_PPC64_TOC16
:
6618 case elfcpp::R_PPC64_TOC16_LO
:
6619 case elfcpp::R_PPC64_TOC16_HI
:
6620 case elfcpp::R_PPC64_TOC16_HA
:
6621 case elfcpp::R_PPC64_TOC16_DS
:
6622 case elfcpp::R_PPC64_TOC16_LO_DS
:
6623 unsigned int shndx
= lsym
.get_st_shndx();
6624 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6626 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6627 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6629 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_offset();
6630 if (dst_off
< ppc_object
->section_size(shndx
))
6633 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6635 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6637 // Need to check that the insn is a ld
6639 view
= ppc_object
->section_contents(data_shndx
,
6642 section_size_type off
=
6643 (convert_to_section_size_type(reloc
.get_r_offset())
6644 + (big_endian
? -2 : 3));
6646 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6650 ppc_object
->set_no_toc_opt(dst_off
);
6661 case elfcpp::R_POWERPC_REL32
:
6662 if (ppc_object
->got2_shndx() != 0
6663 && parameters
->options().output_is_position_independent())
6665 unsigned int shndx
= lsym
.get_st_shndx();
6666 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6668 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6669 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
6670 && (ppc_object
->section_flags(data_shndx
)
6671 & elfcpp::SHF_EXECINSTR
) != 0)
6672 gold_error(_("%s: unsupported -mbss-plt code"),
6673 ppc_object
->name().c_str());
6683 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6684 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6685 case elfcpp::R_POWERPC_GOT_TPREL16
:
6686 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6687 case elfcpp::R_POWERPC_GOT16
:
6688 case elfcpp::R_PPC64_GOT16_DS
:
6689 case elfcpp::R_PPC64_TOC16
:
6690 case elfcpp::R_PPC64_TOC16_DS
:
6691 ppc_object
->set_has_small_toc_reloc();
6697 // Report an unsupported relocation against a global symbol.
6699 template<int size
, bool big_endian
>
6701 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
6702 Sized_relobj_file
<size
, big_endian
>* object
,
6703 unsigned int r_type
,
6706 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
6707 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
6710 // Scan a relocation for a global symbol.
6712 template<int size
, bool big_endian
>
6714 Target_powerpc
<size
, big_endian
>::Scan::global(
6715 Symbol_table
* symtab
,
6717 Target_powerpc
<size
, big_endian
>* target
,
6718 Sized_relobj_file
<size
, big_endian
>* object
,
6719 unsigned int data_shndx
,
6720 Output_section
* output_section
,
6721 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6722 unsigned int r_type
,
6725 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
6728 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6729 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6731 this->expect_tls_get_addr_call();
6732 const bool final
= gsym
->final_value_is_known();
6733 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6734 if (tls_type
!= tls::TLSOPT_NONE
)
6735 this->skip_next_tls_get_addr_call();
6737 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6738 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6740 this->expect_tls_get_addr_call();
6741 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6742 if (tls_type
!= tls::TLSOPT_NONE
)
6743 this->skip_next_tls_get_addr_call();
6746 Powerpc_relobj
<size
, big_endian
>* ppc_object
6747 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6749 // A STT_GNU_IFUNC symbol may require a PLT entry.
6750 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
6751 bool pushed_ifunc
= false;
6752 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6754 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6755 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6756 r_type
, r_sym
, reloc
.get_r_addend());
6757 target
->make_plt_entry(symtab
, layout
, gsym
);
6758 pushed_ifunc
= true;
6763 case elfcpp::R_POWERPC_NONE
:
6764 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6765 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6766 case elfcpp::R_PPC_LOCAL24PC
:
6767 case elfcpp::R_POWERPC_TLS
:
6768 case elfcpp::R_PPC64_ENTRY
:
6771 case elfcpp::R_PPC64_TOC
:
6773 Output_data_got_powerpc
<size
, big_endian
>* got
6774 = target
->got_section(symtab
, layout
);
6775 if (parameters
->options().output_is_position_independent())
6777 Address off
= reloc
.get_r_offset();
6779 && data_shndx
== ppc_object
->opd_shndx()
6780 && ppc_object
->get_opd_discard(off
- 8))
6783 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6784 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6785 if (data_shndx
!= ppc_object
->opd_shndx())
6786 symobj
= static_cast
6787 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6788 rela_dyn
->add_output_section_relative(got
->output_section(),
6789 elfcpp::R_POWERPC_RELATIVE
,
6791 object
, data_shndx
, off
,
6792 symobj
->toc_base_offset());
6797 case elfcpp::R_PPC64_ADDR64
:
6799 && target
->abiversion() < 2
6800 && data_shndx
== ppc_object
->opd_shndx()
6801 && (gsym
->is_defined_in_discarded_section()
6802 || gsym
->object() != object
))
6804 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6808 case elfcpp::R_PPC64_UADDR64
:
6809 case elfcpp::R_POWERPC_ADDR32
:
6810 case elfcpp::R_POWERPC_UADDR32
:
6811 case elfcpp::R_POWERPC_ADDR24
:
6812 case elfcpp::R_POWERPC_ADDR16
:
6813 case elfcpp::R_POWERPC_ADDR16_LO
:
6814 case elfcpp::R_POWERPC_ADDR16_HI
:
6815 case elfcpp::R_POWERPC_ADDR16_HA
:
6816 case elfcpp::R_POWERPC_UADDR16
:
6817 case elfcpp::R_PPC64_ADDR16_HIGH
:
6818 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6819 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6820 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6821 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6822 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6823 case elfcpp::R_PPC64_ADDR16_DS
:
6824 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6825 case elfcpp::R_POWERPC_ADDR14
:
6826 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6827 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6829 // Make a PLT entry if necessary.
6830 if (gsym
->needs_plt_entry())
6832 // Since this is not a PC-relative relocation, we may be
6833 // taking the address of a function. In that case we need to
6834 // set the entry in the dynamic symbol table to the address of
6835 // the PLT call stub.
6836 bool need_ifunc_plt
= false;
6837 if ((size
== 32 || target
->abiversion() >= 2)
6838 && gsym
->is_from_dynobj()
6839 && !parameters
->options().output_is_position_independent())
6841 gsym
->set_needs_dynsym_value();
6842 need_ifunc_plt
= true;
6844 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6846 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6847 target
->push_branch(ppc_object
, data_shndx
,
6848 reloc
.get_r_offset(), r_type
, r_sym
,
6849 reloc
.get_r_addend());
6850 target
->make_plt_entry(symtab
, layout
, gsym
);
6853 // Make a dynamic relocation if necessary.
6854 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6855 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6857 if (!parameters
->options().output_is_position_independent()
6858 && gsym
->may_need_copy_reloc())
6860 target
->copy_reloc(symtab
, layout
, object
,
6861 data_shndx
, output_section
, gsym
, reloc
);
6863 else if ((((size
== 32
6864 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6866 && r_type
== elfcpp::R_PPC64_ADDR64
6867 && target
->abiversion() >= 2))
6868 && gsym
->can_use_relative_reloc(false)
6869 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6870 && parameters
->options().shared()))
6872 && r_type
== elfcpp::R_PPC64_ADDR64
6873 && target
->abiversion() < 2
6874 && (gsym
->can_use_relative_reloc(false)
6875 || data_shndx
== ppc_object
->opd_shndx())))
6877 Reloc_section
* rela_dyn
6878 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6879 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6880 : elfcpp::R_POWERPC_RELATIVE
);
6881 rela_dyn
->add_symbolless_global_addend(
6882 gsym
, dynrel
, output_section
, object
, data_shndx
,
6883 reloc
.get_r_offset(), reloc
.get_r_addend());
6887 Reloc_section
* rela_dyn
6888 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6889 check_non_pic(object
, r_type
);
6890 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6892 reloc
.get_r_offset(),
6893 reloc
.get_r_addend());
6896 && parameters
->options().toc_optimize()
6897 && data_shndx
== ppc_object
->toc_shndx())
6898 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6904 case elfcpp::R_PPC_PLTREL24
:
6905 case elfcpp::R_POWERPC_REL24
:
6908 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6909 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6910 r_type
, r_sym
, reloc
.get_r_addend());
6911 if (gsym
->needs_plt_entry()
6912 || (!gsym
->final_value_is_known()
6913 && (gsym
->is_undefined()
6914 || gsym
->is_from_dynobj()
6915 || gsym
->is_preemptible())))
6916 target
->make_plt_entry(symtab
, layout
, gsym
);
6920 case elfcpp::R_PPC64_REL64
:
6921 case elfcpp::R_POWERPC_REL32
:
6922 // Make a dynamic relocation if necessary.
6923 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6925 if (!parameters
->options().output_is_position_independent()
6926 && gsym
->may_need_copy_reloc())
6928 target
->copy_reloc(symtab
, layout
, object
,
6929 data_shndx
, output_section
, gsym
,
6934 Reloc_section
* rela_dyn
6935 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6936 check_non_pic(object
, r_type
);
6937 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6938 data_shndx
, reloc
.get_r_offset(),
6939 reloc
.get_r_addend());
6944 case elfcpp::R_POWERPC_REL14
:
6945 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6946 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6949 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6950 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6951 r_type
, r_sym
, reloc
.get_r_addend());
6955 case elfcpp::R_PPC64_TOCSAVE
:
6956 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6957 // caller has already saved r2 and thus a plt call stub need not
6960 && target
->mark_pltcall(ppc_object
, data_shndx
,
6961 reloc
.get_r_offset() - 4, symtab
))
6963 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6965 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
6967 object
->error(_("tocsave symbol %u has bad shndx %u"),
6971 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
6972 target
->add_tocsave(ppc_object
, shndx
,
6973 sym
->value() + reloc
.get_r_addend());
6978 case elfcpp::R_POWERPC_REL16
:
6979 case elfcpp::R_POWERPC_REL16_LO
:
6980 case elfcpp::R_POWERPC_REL16_HI
:
6981 case elfcpp::R_POWERPC_REL16_HA
:
6982 case elfcpp::R_POWERPC_REL16DX_HA
:
6983 case elfcpp::R_POWERPC_SECTOFF
:
6984 case elfcpp::R_POWERPC_SECTOFF_LO
:
6985 case elfcpp::R_POWERPC_SECTOFF_HI
:
6986 case elfcpp::R_POWERPC_SECTOFF_HA
:
6987 case elfcpp::R_PPC64_SECTOFF_DS
:
6988 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6989 case elfcpp::R_POWERPC_TPREL16
:
6990 case elfcpp::R_POWERPC_TPREL16_LO
:
6991 case elfcpp::R_POWERPC_TPREL16_HI
:
6992 case elfcpp::R_POWERPC_TPREL16_HA
:
6993 case elfcpp::R_PPC64_TPREL16_DS
:
6994 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6995 case elfcpp::R_PPC64_TPREL16_HIGH
:
6996 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6997 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6998 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6999 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7000 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7001 case elfcpp::R_POWERPC_DTPREL16
:
7002 case elfcpp::R_POWERPC_DTPREL16_LO
:
7003 case elfcpp::R_POWERPC_DTPREL16_HI
:
7004 case elfcpp::R_POWERPC_DTPREL16_HA
:
7005 case elfcpp::R_PPC64_DTPREL16_DS
:
7006 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7007 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7008 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7009 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7010 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7011 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7012 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7013 case elfcpp::R_PPC64_TLSGD
:
7014 case elfcpp::R_PPC64_TLSLD
:
7015 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7018 case elfcpp::R_POWERPC_GOT16
:
7019 case elfcpp::R_POWERPC_GOT16_LO
:
7020 case elfcpp::R_POWERPC_GOT16_HI
:
7021 case elfcpp::R_POWERPC_GOT16_HA
:
7022 case elfcpp::R_PPC64_GOT16_DS
:
7023 case elfcpp::R_PPC64_GOT16_LO_DS
:
7025 // The symbol requires a GOT entry.
7026 Output_data_got_powerpc
<size
, big_endian
>* got
;
7028 got
= target
->got_section(symtab
, layout
);
7029 if (gsym
->final_value_is_known())
7032 && (size
== 32 || target
->abiversion() >= 2))
7033 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7035 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7037 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7039 // If we are generating a shared object or a pie, this
7040 // symbol's GOT entry will be set by a dynamic relocation.
7041 unsigned int off
= got
->add_constant(0);
7042 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7044 Reloc_section
* rela_dyn
7045 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7047 if (gsym
->can_use_relative_reloc(false)
7049 || target
->abiversion() >= 2)
7050 && gsym
->visibility() == elfcpp::STV_PROTECTED
7051 && parameters
->options().shared()))
7053 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7054 : elfcpp::R_POWERPC_RELATIVE
);
7055 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7059 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7060 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7066 case elfcpp::R_PPC64_TOC16
:
7067 case elfcpp::R_PPC64_TOC16_LO
:
7068 case elfcpp::R_PPC64_TOC16_HI
:
7069 case elfcpp::R_PPC64_TOC16_HA
:
7070 case elfcpp::R_PPC64_TOC16_DS
:
7071 case elfcpp::R_PPC64_TOC16_LO_DS
:
7072 // We need a GOT section.
7073 target
->got_section(symtab
, layout
);
7076 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7077 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7078 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7079 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7081 const bool final
= gsym
->final_value_is_known();
7082 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7083 if (tls_type
== tls::TLSOPT_NONE
)
7085 Output_data_got_powerpc
<size
, big_endian
>* got
7086 = target
->got_section(symtab
, layout
);
7087 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7088 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7089 elfcpp::R_POWERPC_DTPMOD
,
7090 elfcpp::R_POWERPC_DTPREL
);
7092 else if (tls_type
== tls::TLSOPT_TO_IE
)
7094 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7096 Output_data_got_powerpc
<size
, big_endian
>* got
7097 = target
->got_section(symtab
, layout
);
7098 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7099 if (gsym
->is_undefined()
7100 || gsym
->is_from_dynobj())
7102 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7103 elfcpp::R_POWERPC_TPREL
);
7107 unsigned int off
= got
->add_constant(0);
7108 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7109 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7110 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7115 else if (tls_type
== tls::TLSOPT_TO_LE
)
7117 // no GOT relocs needed for Local Exec.
7124 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7125 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7126 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7127 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7129 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7130 if (tls_type
== tls::TLSOPT_NONE
)
7131 target
->tlsld_got_offset(symtab
, layout
, object
);
7132 else if (tls_type
== tls::TLSOPT_TO_LE
)
7134 // no GOT relocs needed for Local Exec.
7135 if (parameters
->options().emit_relocs())
7137 Output_section
* os
= layout
->tls_segment()->first_section();
7138 gold_assert(os
!= NULL
);
7139 os
->set_needs_symtab_index();
7147 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7148 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7149 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7150 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7152 Output_data_got_powerpc
<size
, big_endian
>* got
7153 = target
->got_section(symtab
, layout
);
7154 if (!gsym
->final_value_is_known()
7155 && (gsym
->is_from_dynobj()
7156 || gsym
->is_undefined()
7157 || gsym
->is_preemptible()))
7158 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7159 target
->rela_dyn_section(layout
),
7160 elfcpp::R_POWERPC_DTPREL
);
7162 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7166 case elfcpp::R_POWERPC_GOT_TPREL16
:
7167 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7168 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7169 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7171 const bool final
= gsym
->final_value_is_known();
7172 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7173 if (tls_type
== tls::TLSOPT_NONE
)
7175 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7177 Output_data_got_powerpc
<size
, big_endian
>* got
7178 = target
->got_section(symtab
, layout
);
7179 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7180 if (gsym
->is_undefined()
7181 || gsym
->is_from_dynobj())
7183 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7184 elfcpp::R_POWERPC_TPREL
);
7188 unsigned int off
= got
->add_constant(0);
7189 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7190 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7191 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7196 else if (tls_type
== tls::TLSOPT_TO_LE
)
7198 // no GOT relocs needed for Local Exec.
7206 unsupported_reloc_global(object
, r_type
, gsym
);
7211 && parameters
->options().toc_optimize())
7213 if (data_shndx
== ppc_object
->toc_shndx())
7216 if (r_type
!= elfcpp::R_PPC64_ADDR64
7217 || (is_ifunc
&& target
->abiversion() < 2))
7219 else if (parameters
->options().output_is_position_independent()
7220 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7223 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7226 enum {no_check
, check_lo
, check_ha
} insn_check
;
7230 insn_check
= no_check
;
7233 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7234 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7235 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7236 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7237 case elfcpp::R_POWERPC_GOT16_HA
:
7238 case elfcpp::R_PPC64_TOC16_HA
:
7239 insn_check
= check_ha
;
7242 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7243 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7244 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7245 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7246 case elfcpp::R_POWERPC_GOT16_LO
:
7247 case elfcpp::R_PPC64_GOT16_LO_DS
:
7248 case elfcpp::R_PPC64_TOC16_LO
:
7249 case elfcpp::R_PPC64_TOC16_LO_DS
:
7250 insn_check
= check_lo
;
7254 section_size_type slen
;
7255 const unsigned char* view
= NULL
;
7256 if (insn_check
!= no_check
)
7258 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7259 section_size_type off
=
7260 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7263 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7264 if (insn_check
== check_lo
7265 ? !ok_lo_toc_insn(insn
, r_type
)
7266 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7267 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7269 ppc_object
->set_no_toc_opt();
7270 gold_warning(_("%s: toc optimization is not supported "
7271 "for %#08x instruction"),
7272 ppc_object
->name().c_str(), insn
);
7281 case elfcpp::R_PPC64_TOC16
:
7282 case elfcpp::R_PPC64_TOC16_LO
:
7283 case elfcpp::R_PPC64_TOC16_HI
:
7284 case elfcpp::R_PPC64_TOC16_HA
:
7285 case elfcpp::R_PPC64_TOC16_DS
:
7286 case elfcpp::R_PPC64_TOC16_LO_DS
:
7287 if (gsym
->source() == Symbol::FROM_OBJECT
7288 && !gsym
->object()->is_dynamic())
7290 Powerpc_relobj
<size
, big_endian
>* sym_object
7291 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7293 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7294 if (shndx
== sym_object
->toc_shndx())
7296 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7297 Address dst_off
= sym
->value() + reloc
.get_r_offset();
7298 if (dst_off
< sym_object
->section_size(shndx
))
7301 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7303 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7305 // Need to check that the insn is a ld
7307 view
= ppc_object
->section_contents(data_shndx
,
7310 section_size_type off
=
7311 (convert_to_section_size_type(reloc
.get_r_offset())
7312 + (big_endian
? -2 : 3));
7314 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7318 sym_object
->set_no_toc_opt(dst_off
);
7330 case elfcpp::R_PPC_LOCAL24PC
:
7331 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7332 gold_error(_("%s: unsupported -mbss-plt code"),
7333 ppc_object
->name().c_str());
7342 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7343 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7344 case elfcpp::R_POWERPC_GOT_TPREL16
:
7345 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7346 case elfcpp::R_POWERPC_GOT16
:
7347 case elfcpp::R_PPC64_GOT16_DS
:
7348 case elfcpp::R_PPC64_TOC16
:
7349 case elfcpp::R_PPC64_TOC16_DS
:
7350 ppc_object
->set_has_small_toc_reloc();
7356 // Process relocations for gc.
7358 template<int size
, bool big_endian
>
7360 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
7361 Symbol_table
* symtab
,
7363 Sized_relobj_file
<size
, big_endian
>* object
,
7364 unsigned int data_shndx
,
7366 const unsigned char* prelocs
,
7368 Output_section
* output_section
,
7369 bool needs_special_offset_handling
,
7370 size_t local_symbol_count
,
7371 const unsigned char* plocal_symbols
)
7373 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7374 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7377 Powerpc_relobj
<size
, big_endian
>* ppc_object
7378 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7380 ppc_object
->set_opd_valid();
7381 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7383 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7384 for (p
= ppc_object
->access_from_map()->begin();
7385 p
!= ppc_object
->access_from_map()->end();
7388 Address dst_off
= p
->first
;
7389 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7390 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7391 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7393 Relobj
* src_obj
= s
->first
;
7394 unsigned int src_indx
= s
->second
;
7395 symtab
->gc()->add_reference(src_obj
, src_indx
,
7396 ppc_object
, dst_indx
);
7400 ppc_object
->access_from_map()->clear();
7401 ppc_object
->process_gc_mark(symtab
);
7402 // Don't look at .opd relocs as .opd will reference everything.
7406 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7415 needs_special_offset_handling
,
7420 // Handle target specific gc actions when adding a gc reference from
7421 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7422 // and DST_OFF. For powerpc64, this adds a referenc to the code
7423 // section of a function descriptor.
7425 template<int size
, bool big_endian
>
7427 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7428 Symbol_table
* symtab
,
7430 unsigned int src_shndx
,
7432 unsigned int dst_shndx
,
7433 Address dst_off
) const
7435 if (size
!= 64 || dst_obj
->is_dynamic())
7438 Powerpc_relobj
<size
, big_endian
>* ppc_object
7439 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7440 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7442 if (ppc_object
->opd_valid())
7444 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7445 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7449 // If we haven't run scan_opd_relocs, we must delay
7450 // processing this function descriptor reference.
7451 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7456 // Add any special sections for this symbol to the gc work list.
7457 // For powerpc64, this adds the code section of a function
7460 template<int size
, bool big_endian
>
7462 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7463 Symbol_table
* symtab
,
7468 Powerpc_relobj
<size
, big_endian
>* ppc_object
7469 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7471 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7472 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7474 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7475 Address dst_off
= gsym
->value();
7476 if (ppc_object
->opd_valid())
7478 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7479 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7483 ppc_object
->add_gc_mark(dst_off
);
7488 // For a symbol location in .opd, set LOC to the location of the
7491 template<int size
, bool big_endian
>
7493 Target_powerpc
<size
, big_endian
>::do_function_location(
7494 Symbol_location
* loc
) const
7496 if (size
== 64 && loc
->shndx
!= 0)
7498 if (loc
->object
->is_dynamic())
7500 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7501 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7502 if (loc
->shndx
== ppc_object
->opd_shndx())
7505 Address off
= loc
->offset
- ppc_object
->opd_address();
7506 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7507 loc
->offset
= dest_off
;
7512 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7513 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7514 if (loc
->shndx
== ppc_object
->opd_shndx())
7517 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7518 loc
->offset
= dest_off
;
7524 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7525 // compiled with -fsplit-stack. The function calls non-split-stack
7526 // code. Change the function to ensure it has enough stack space to
7527 // call some random function.
7529 template<int size
, bool big_endian
>
7531 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7534 section_offset_type fnoffset
,
7535 section_size_type fnsize
,
7536 const unsigned char* prelocs
,
7538 unsigned char* view
,
7539 section_size_type view_size
,
7541 std::string
* to
) const
7543 // 32-bit not supported.
7547 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7548 prelocs
, reloc_count
, view
, view_size
,
7553 // The function always starts with
7554 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7555 // addis %r12,%r1,-allocate@ha
7556 // addi %r12,%r12,-allocate@l
7558 // but note that the addis or addi may be replaced with a nop
7560 unsigned char *entry
= view
+ fnoffset
;
7561 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7563 if ((insn
& 0xffff0000) == addis_2_12
)
7565 /* Skip ELFv2 global entry code. */
7567 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7570 unsigned char *pinsn
= entry
;
7572 const uint32_t ld_private_ss
= 0xe80d8fc0;
7573 if (insn
== ld_private_ss
)
7575 int32_t allocate
= 0;
7579 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7580 if ((insn
& 0xffff0000) == addis_12_1
)
7581 allocate
+= (insn
& 0xffff) << 16;
7582 else if ((insn
& 0xffff0000) == addi_12_1
7583 || (insn
& 0xffff0000) == addi_12_12
)
7584 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7585 else if (insn
!= nop
)
7588 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7590 int extra
= parameters
->options().split_stack_adjust_size();
7592 if (allocate
>= 0 || extra
< 0)
7594 object
->error(_("split-stack stack size overflow at "
7595 "section %u offset %0zx"),
7596 shndx
, static_cast<size_t>(fnoffset
));
7600 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7601 if (insn
!= addis_12_1
)
7603 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7605 insn
= addi_12_12
| (allocate
& 0xffff);
7606 if (insn
!= addi_12_12
)
7608 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7614 insn
= addi_12_1
| (allocate
& 0xffff);
7615 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7618 if (pinsn
!= entry
+ 12)
7619 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7627 if (!object
->has_no_split_stack())
7628 object
->error(_("failed to match split-stack sequence at "
7629 "section %u offset %0zx"),
7630 shndx
, static_cast<size_t>(fnoffset
));
7634 // Scan relocations for a section.
7636 template<int size
, bool big_endian
>
7638 Target_powerpc
<size
, big_endian
>::scan_relocs(
7639 Symbol_table
* symtab
,
7641 Sized_relobj_file
<size
, big_endian
>* object
,
7642 unsigned int data_shndx
,
7643 unsigned int sh_type
,
7644 const unsigned char* prelocs
,
7646 Output_section
* output_section
,
7647 bool needs_special_offset_handling
,
7648 size_t local_symbol_count
,
7649 const unsigned char* plocal_symbols
)
7651 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7652 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7655 if (!this->plt_localentry0_init_
)
7657 bool plt_localentry0
= false;
7659 && this->abiversion() >= 2)
7661 if (parameters
->options().user_set_plt_localentry())
7662 plt_localentry0
= parameters
->options().plt_localentry();
7664 this->plt_localentry0_
= plt_localentry0
;
7665 this->plt_localentry0_init_
= true;
7668 if (sh_type
== elfcpp::SHT_REL
)
7670 gold_error(_("%s: unsupported REL reloc section"),
7671 object
->name().c_str());
7675 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7684 needs_special_offset_handling
,
7689 // Functor class for processing the global symbol table.
7690 // Removes symbols defined on discarded opd entries.
7692 template<bool big_endian
>
7693 class Global_symbol_visitor_opd
7696 Global_symbol_visitor_opd()
7700 operator()(Sized_symbol
<64>* sym
)
7702 if (sym
->has_symtab_index()
7703 || sym
->source() != Symbol::FROM_OBJECT
7704 || !sym
->in_real_elf())
7707 if (sym
->object()->is_dynamic())
7710 Powerpc_relobj
<64, big_endian
>* symobj
7711 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
7712 if (symobj
->opd_shndx() == 0)
7716 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7717 if (shndx
== symobj
->opd_shndx()
7718 && symobj
->get_opd_discard(sym
->value()))
7720 sym
->set_undefined();
7721 sym
->set_visibility(elfcpp::STV_DEFAULT
);
7722 sym
->set_is_defined_in_discarded_section();
7723 sym
->set_symtab_index(-1U);
7728 template<int size
, bool big_endian
>
7730 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
7732 Symbol_table
* symtab
)
7736 Output_data_save_res
<size
, big_endian
>* savres
7737 = new Output_data_save_res
<size
, big_endian
>(symtab
);
7738 this->savres_section_
= savres
;
7739 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
7740 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
7741 savres
, ORDER_TEXT
, false);
7745 // Sort linker created .got section first (for the header), then input
7746 // sections belonging to files using small model code.
7748 template<bool big_endian
>
7749 class Sort_toc_sections
7753 operator()(const Output_section::Input_section
& is1
,
7754 const Output_section::Input_section
& is2
) const
7756 if (!is1
.is_input_section() && is2
.is_input_section())
7759 = (is1
.is_input_section()
7760 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
7761 ->has_small_toc_reloc()));
7763 = (is2
.is_input_section()
7764 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
7765 ->has_small_toc_reloc()));
7766 return small1
&& !small2
;
7770 // Finalize the sections.
7772 template<int size
, bool big_endian
>
7774 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
7776 const Input_objects
*,
7777 Symbol_table
* symtab
)
7779 if (parameters
->doing_static_link())
7781 // At least some versions of glibc elf-init.o have a strong
7782 // reference to __rela_iplt marker syms. A weak ref would be
7784 if (this->iplt_
!= NULL
)
7786 Reloc_section
* rel
= this->iplt_
->rel_plt();
7787 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
7788 Symbol_table::PREDEFINED
, rel
, 0, 0,
7789 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7790 elfcpp::STV_HIDDEN
, 0, false, true);
7791 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
7792 Symbol_table::PREDEFINED
, rel
, 0, 0,
7793 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7794 elfcpp::STV_HIDDEN
, 0, true, true);
7798 symtab
->define_as_constant("__rela_iplt_start", NULL
,
7799 Symbol_table::PREDEFINED
, 0, 0,
7800 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7801 elfcpp::STV_HIDDEN
, 0, true, false);
7802 symtab
->define_as_constant("__rela_iplt_end", NULL
,
7803 Symbol_table::PREDEFINED
, 0, 0,
7804 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
7805 elfcpp::STV_HIDDEN
, 0, true, false);
7811 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
7812 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
7814 if (!parameters
->options().relocatable())
7816 this->define_save_restore_funcs(layout
, symtab
);
7818 // Annoyingly, we need to make these sections now whether or
7819 // not we need them. If we delay until do_relax then we
7820 // need to mess with the relaxation machinery checkpointing.
7821 this->got_section(symtab
, layout
);
7822 this->make_brlt_section(layout
);
7824 if (parameters
->options().toc_sort())
7826 Output_section
* os
= this->got_
->output_section();
7827 if (os
!= NULL
&& os
->input_sections().size() > 1)
7828 std::stable_sort(os
->input_sections().begin(),
7829 os
->input_sections().end(),
7830 Sort_toc_sections
<big_endian
>());
7835 // Fill in some more dynamic tags.
7836 Output_data_dynamic
* odyn
= layout
->dynamic_data();
7839 const Reloc_section
* rel_plt
= (this->plt_
== NULL
7841 : this->plt_
->rel_plt());
7842 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
7843 this->rela_dyn_
, true, size
== 32);
7847 if (this->got_
!= NULL
)
7849 this->got_
->finalize_data_size();
7850 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
7851 this->got_
, this->got_
->g_o_t());
7856 if (this->glink_
!= NULL
)
7858 this->glink_
->finalize_data_size();
7859 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
7861 (this->glink_
->pltresolve_size
7864 if (this->has_localentry0_
)
7865 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
7866 elfcpp::PPC64_OPT_LOCALENTRY
);
7870 // Emit any relocs we saved in an attempt to avoid generating COPY
7872 if (this->copy_relocs_
.any_saved_relocs())
7873 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
7876 // Emit any saved relocs, and mark toc entries using any of these
7877 // relocs as not optimizable.
7879 template<int sh_type
, int size
, bool big_endian
>
7881 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
7882 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
7885 && parameters
->options().toc_optimize())
7887 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
7888 Copy_reloc_entries::iterator p
= this->entries_
.begin();
7889 p
!= this->entries_
.end();
7892 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
7895 // If the symbol is no longer defined in a dynamic object,
7896 // then we emitted a COPY relocation. If it is still
7897 // dynamic then we'll need dynamic relocations and thus
7898 // can't optimize toc entries.
7899 if (entry
.sym_
->is_from_dynobj())
7901 Powerpc_relobj
<size
, big_endian
>* ppc_object
7902 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
7903 if (entry
.shndx_
== ppc_object
->toc_shndx())
7904 ppc_object
->set_no_toc_opt(entry
.address_
);
7909 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
7912 // Return the value to use for a branch relocation.
7914 template<int size
, bool big_endian
>
7916 Target_powerpc
<size
, big_endian
>::symval_for_branch(
7917 const Symbol_table
* symtab
,
7918 const Sized_symbol
<size
>* gsym
,
7919 Powerpc_relobj
<size
, big_endian
>* object
,
7921 unsigned int *dest_shndx
)
7923 if (size
== 32 || this->abiversion() >= 2)
7927 // If the symbol is defined in an opd section, ie. is a function
7928 // descriptor, use the function descriptor code entry address
7929 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
7931 && (gsym
->source() != Symbol::FROM_OBJECT
7932 || gsym
->object()->is_dynamic()))
7935 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7936 unsigned int shndx
= symobj
->opd_shndx();
7939 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
7940 if (opd_addr
== invalid_address
)
7942 opd_addr
+= symobj
->output_section_address(shndx
);
7943 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
7946 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
7947 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
7950 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
7951 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
7952 *dest_shndx
= folded
.second
;
7954 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
7955 if (sec_addr
== invalid_address
)
7958 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
7959 *value
= sec_addr
+ sec_off
;
7964 // Perform a relocation.
7966 template<int size
, bool big_endian
>
7968 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
7969 const Relocate_info
<size
, big_endian
>* relinfo
,
7971 Target_powerpc
* target
,
7974 const unsigned char* preloc
,
7975 const Sized_symbol
<size
>* gsym
,
7976 const Symbol_value
<size
>* psymval
,
7977 unsigned char* view
,
7979 section_size_type view_size
)
7984 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
7985 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
7986 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7988 case Track_tls::NOT_EXPECTED
:
7989 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7990 _("__tls_get_addr call lacks marker reloc"));
7992 case Track_tls::EXPECTED
:
7993 // We have already complained.
7995 case Track_tls::SKIP
:
7997 case Track_tls::NORMAL
:
8001 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8002 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8003 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8004 // Offset from start of insn to d-field reloc.
8005 const int d_offset
= big_endian
? 2 : 0;
8007 Powerpc_relobj
<size
, big_endian
>* const object
8008 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8010 bool has_stub_value
= false;
8011 bool localentry0
= false;
8012 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8014 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8015 : object
->local_has_plt_offset(r_sym
))
8016 && (!psymval
->is_ifunc_symbol()
8017 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8021 && target
->abiversion() >= 2
8022 && !parameters
->options().output_is_position_independent()
8023 && !is_branch_reloc(r_type
))
8025 Address off
= target
->glink_section()->find_global_entry(gsym
);
8026 if (off
!= invalid_address
)
8028 value
= target
->glink_section()->global_entry_address() + off
;
8029 has_stub_value
= true;
8034 Stub_table
<size
, big_endian
>* stub_table
8035 = object
->stub_table(relinfo
->data_shndx
);
8036 if (stub_table
== NULL
)
8038 // This is a ref from a data section to an ifunc symbol.
8039 if (target
->stub_tables().size() != 0)
8040 stub_table
= target
->stub_tables()[0];
8042 if (stub_table
!= NULL
)
8044 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8046 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8047 rela
.get_r_addend());
8049 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8050 rela
.get_r_addend());
8053 value
= stub_table
->stub_address() + ent
->off_
;
8054 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8055 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8056 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8059 && relnum
+ 1 < reloc_count
)
8061 Reltype
next_rela(preloc
+ reloc_size
);
8062 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8063 == elfcpp::R_PPC64_TOCSAVE
8064 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8067 localentry0
= ent
->localentry0_
;
8068 has_stub_value
= true;
8072 // We don't care too much about bogus debug references to
8073 // non-local functions, but otherwise there had better be a plt
8074 // call stub or global entry stub as appropriate.
8075 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
8078 if (r_type
== elfcpp::R_POWERPC_GOT16
8079 || r_type
== elfcpp::R_POWERPC_GOT16_LO
8080 || r_type
== elfcpp::R_POWERPC_GOT16_HI
8081 || r_type
== elfcpp::R_POWERPC_GOT16_HA
8082 || r_type
== elfcpp::R_PPC64_GOT16_DS
8083 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
8087 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
8088 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
8092 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
8093 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
8095 value
-= target
->got_section()->got_base_offset(object
);
8097 else if (r_type
== elfcpp::R_PPC64_TOC
)
8099 value
= (target
->got_section()->output_section()->address()
8100 + object
->toc_base_offset());
8102 else if (gsym
!= NULL
8103 && (r_type
== elfcpp::R_POWERPC_REL24
8104 || r_type
== elfcpp::R_PPC_PLTREL24
)
8109 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
8110 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
8111 bool can_plt_call
= localentry0
;
8112 if (!localentry0
&& rela
.get_r_offset() + 8 <= view_size
)
8114 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
8115 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
8118 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
8120 elfcpp::Swap
<32, big_endian
>::
8121 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
8122 can_plt_call
= true;
8127 // If we don't have a branch and link followed by a nop,
8128 // we can't go via the plt because there is no place to
8129 // put a toc restoring instruction.
8130 // Unless we know we won't be returning.
8131 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
8132 can_plt_call
= true;
8136 // g++ as of 20130507 emits self-calls without a
8137 // following nop. This is arguably wrong since we have
8138 // conflicting information. On the one hand a global
8139 // symbol and on the other a local call sequence, but
8140 // don't error for this special case.
8141 // It isn't possible to cheaply verify we have exactly
8142 // such a call. Allow all calls to the same section.
8144 Address code
= value
;
8145 if (gsym
->source() == Symbol::FROM_OBJECT
8146 && gsym
->object() == object
)
8148 unsigned int dest_shndx
= 0;
8149 if (target
->abiversion() < 2)
8151 Address addend
= rela
.get_r_addend();
8152 code
= psymval
->value(object
, addend
);
8153 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8154 &code
, &dest_shndx
);
8157 if (dest_shndx
== 0)
8158 dest_shndx
= gsym
->shndx(&is_ordinary
);
8159 ok
= dest_shndx
== relinfo
->data_shndx
;
8163 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8164 _("call lacks nop, can't restore toc; "
8165 "recompile with -fPIC"));
8171 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8172 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8173 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8174 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8176 // First instruction of a global dynamic sequence, arg setup insn.
8177 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8178 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8179 enum Got_type got_type
= GOT_TYPE_STANDARD
;
8180 if (tls_type
== tls::TLSOPT_NONE
)
8181 got_type
= GOT_TYPE_TLSGD
;
8182 else if (tls_type
== tls::TLSOPT_TO_IE
)
8183 got_type
= GOT_TYPE_TPREL
;
8184 if (got_type
!= GOT_TYPE_STANDARD
)
8188 gold_assert(gsym
->has_got_offset(got_type
));
8189 value
= gsym
->got_offset(got_type
);
8193 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
8194 value
= object
->local_got_offset(r_sym
, got_type
);
8196 value
-= target
->got_section()->got_base_offset(object
);
8198 if (tls_type
== tls::TLSOPT_TO_IE
)
8200 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8201 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8203 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8204 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8205 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
8207 insn
|= 32 << 26; // lwz
8209 insn
|= 58 << 26; // ld
8210 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8212 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8213 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8215 else if (tls_type
== tls::TLSOPT_TO_LE
)
8217 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8218 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8220 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8221 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8222 insn
&= (1 << 26) - (1 << 21); // extract rt
8227 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8228 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8229 value
= psymval
->value(object
, rela
.get_r_addend());
8233 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8235 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8236 r_type
= elfcpp::R_POWERPC_NONE
;
8240 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8241 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8242 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8243 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8245 // First instruction of a local dynamic sequence, arg setup insn.
8246 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8247 if (tls_type
== tls::TLSOPT_NONE
)
8249 value
= target
->tlsld_got_offset();
8250 value
-= target
->got_section()->got_base_offset(object
);
8254 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8255 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8256 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8258 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8259 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8260 insn
&= (1 << 26) - (1 << 21); // extract rt
8265 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8266 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8271 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8273 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8274 r_type
= elfcpp::R_POWERPC_NONE
;
8278 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
8279 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
8280 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
8281 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
8283 // Accesses relative to a local dynamic sequence address,
8284 // no optimisation here.
8287 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
8288 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
8292 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
8293 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
8295 value
-= target
->got_section()->got_base_offset(object
);
8297 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8298 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8299 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8300 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8302 // First instruction of initial exec sequence.
8303 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8304 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8305 if (tls_type
== tls::TLSOPT_NONE
)
8309 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
8310 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
8314 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
8315 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
8317 value
-= target
->got_section()->got_base_offset(object
);
8321 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8322 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8323 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8325 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8326 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8327 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
8332 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8333 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8334 value
= psymval
->value(object
, rela
.get_r_addend());
8338 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8340 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8341 r_type
= elfcpp::R_POWERPC_NONE
;
8345 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8346 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8348 // Second instruction of a global dynamic sequence,
8349 // the __tls_get_addr call
8350 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8351 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8352 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8353 if (tls_type
!= tls::TLSOPT_NONE
)
8355 if (tls_type
== tls::TLSOPT_TO_IE
)
8357 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8358 Insn insn
= add_3_3_13
;
8361 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8362 r_type
= elfcpp::R_POWERPC_NONE
;
8366 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8367 Insn insn
= addi_3_3
;
8368 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8369 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8371 value
= psymval
->value(object
, rela
.get_r_addend());
8373 this->skip_next_tls_get_addr_call();
8376 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8377 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8379 // Second instruction of a local dynamic sequence,
8380 // the __tls_get_addr call
8381 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8382 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8383 if (tls_type
== tls::TLSOPT_TO_LE
)
8385 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8386 Insn insn
= addi_3_3
;
8387 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8388 this->skip_next_tls_get_addr_call();
8389 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8394 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8396 // Second instruction of an initial exec sequence
8397 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8398 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8399 if (tls_type
== tls::TLSOPT_TO_LE
)
8401 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8402 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8403 unsigned int reg
= size
== 32 ? 2 : 13;
8404 insn
= at_tls_transform(insn
, reg
);
8405 gold_assert(insn
!= 0);
8406 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8407 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8409 value
= psymval
->value(object
, rela
.get_r_addend());
8412 else if (!has_stub_value
)
8415 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8416 addend
= rela
.get_r_addend();
8417 value
= psymval
->value(object
, addend
);
8418 if (size
== 64 && is_branch_reloc(r_type
))
8420 if (target
->abiversion() >= 2)
8423 value
+= object
->ppc64_local_entry_offset(gsym
);
8425 value
+= object
->ppc64_local_entry_offset(r_sym
);
8429 unsigned int dest_shndx
;
8430 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8431 &value
, &dest_shndx
);
8434 Address max_branch_offset
= max_branch_delta(r_type
);
8435 if (max_branch_offset
!= 0
8436 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8438 Stub_table
<size
, big_endian
>* stub_table
8439 = object
->stub_table(relinfo
->data_shndx
);
8440 if (stub_table
!= NULL
)
8442 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8443 if (off
!= invalid_address
)
8445 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8447 has_stub_value
= true;
8455 case elfcpp::R_PPC64_REL64
:
8456 case elfcpp::R_POWERPC_REL32
:
8457 case elfcpp::R_POWERPC_REL24
:
8458 case elfcpp::R_PPC_PLTREL24
:
8459 case elfcpp::R_PPC_LOCAL24PC
:
8460 case elfcpp::R_POWERPC_REL16
:
8461 case elfcpp::R_POWERPC_REL16_LO
:
8462 case elfcpp::R_POWERPC_REL16_HI
:
8463 case elfcpp::R_POWERPC_REL16_HA
:
8464 case elfcpp::R_POWERPC_REL16DX_HA
:
8465 case elfcpp::R_POWERPC_REL14
:
8466 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8467 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8471 case elfcpp::R_PPC64_TOC16
:
8472 case elfcpp::R_PPC64_TOC16_LO
:
8473 case elfcpp::R_PPC64_TOC16_HI
:
8474 case elfcpp::R_PPC64_TOC16_HA
:
8475 case elfcpp::R_PPC64_TOC16_DS
:
8476 case elfcpp::R_PPC64_TOC16_LO_DS
:
8477 // Subtract the TOC base address.
8478 value
-= (target
->got_section()->output_section()->address()
8479 + object
->toc_base_offset());
8482 case elfcpp::R_POWERPC_SECTOFF
:
8483 case elfcpp::R_POWERPC_SECTOFF_LO
:
8484 case elfcpp::R_POWERPC_SECTOFF_HI
:
8485 case elfcpp::R_POWERPC_SECTOFF_HA
:
8486 case elfcpp::R_PPC64_SECTOFF_DS
:
8487 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8489 value
-= os
->address();
8492 case elfcpp::R_PPC64_TPREL16_DS
:
8493 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8494 case elfcpp::R_PPC64_TPREL16_HIGH
:
8495 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8497 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8500 case elfcpp::R_POWERPC_TPREL16
:
8501 case elfcpp::R_POWERPC_TPREL16_LO
:
8502 case elfcpp::R_POWERPC_TPREL16_HI
:
8503 case elfcpp::R_POWERPC_TPREL16_HA
:
8504 case elfcpp::R_POWERPC_TPREL
:
8505 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8506 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8507 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8508 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8509 // tls symbol values are relative to tls_segment()->vaddr()
8513 case elfcpp::R_PPC64_DTPREL16_DS
:
8514 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8515 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8516 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8517 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8518 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8520 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8521 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8524 case elfcpp::R_POWERPC_DTPREL16
:
8525 case elfcpp::R_POWERPC_DTPREL16_LO
:
8526 case elfcpp::R_POWERPC_DTPREL16_HI
:
8527 case elfcpp::R_POWERPC_DTPREL16_HA
:
8528 case elfcpp::R_POWERPC_DTPREL
:
8529 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8530 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8531 // tls symbol values are relative to tls_segment()->vaddr()
8532 value
-= dtp_offset
;
8535 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8537 value
+= object
->ppc64_local_entry_offset(gsym
);
8539 value
+= object
->ppc64_local_entry_offset(r_sym
);
8546 Insn branch_bit
= 0;
8549 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8550 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8551 branch_bit
= 1 << 21;
8553 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8554 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8556 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8557 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8560 if (this->is_isa_v2
)
8562 // Set 'a' bit. This is 0b00010 in BO field for branch
8563 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8564 // for branch on CTR insns (BO == 1a00t or 1a01t).
8565 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8567 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8574 // Invert 'y' bit if not the default.
8575 if (static_cast<Signed_address
>(value
) < 0)
8578 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8593 // Multi-instruction sequences that access the GOT/TOC can
8594 // be optimized, eg.
8595 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8596 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8598 // addis ra,r2,0; addi rb,ra,x@toc@l;
8599 // to nop; addi rb,r2,x@toc;
8600 // FIXME: the @got sequence shown above is not yet
8601 // optimized. Note that gcc as of 2017-01-07 doesn't use
8602 // the ELF @got relocs except for TLS, instead using the
8603 // PowerOpen variant of a compiler managed GOT (called TOC).
8604 // The PowerOpen TOC sequence equivalent to the first
8605 // example is optimized.
8606 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8607 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8608 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8609 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8610 case elfcpp::R_POWERPC_GOT16_HA
:
8611 case elfcpp::R_PPC64_TOC16_HA
:
8612 if (parameters
->options().toc_optimize())
8614 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8615 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8616 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8617 && object
->make_toc_relative(target
, &value
))
8619 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8620 == ((15u << 26) | (2 << 16)));
8622 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8623 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8624 && value
+ 0x8000 < 0x10000)
8626 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8632 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8633 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8634 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8635 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8636 case elfcpp::R_POWERPC_GOT16_LO
:
8637 case elfcpp::R_PPC64_GOT16_LO_DS
:
8638 case elfcpp::R_PPC64_TOC16_LO
:
8639 case elfcpp::R_PPC64_TOC16_LO_DS
:
8640 if (parameters
->options().toc_optimize())
8642 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8643 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8644 bool changed
= false;
8645 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
8646 && object
->make_toc_relative(target
, &value
))
8648 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
8649 insn
^= (14u << 26) ^ (58u << 26);
8650 r_type
= elfcpp::R_PPC64_TOC16_LO
;
8653 if (ok_lo_toc_insn(insn
, r_type
)
8654 && value
+ 0x8000 < 0x10000)
8656 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
8658 // Transform addic to addi when we change reg.
8659 insn
&= ~((0x3f << 26) | (0x1f << 16));
8660 insn
|= (14u << 26) | (2 << 16);
8664 insn
&= ~(0x1f << 16);
8670 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8674 case elfcpp::R_PPC64_ENTRY
:
8675 value
= (target
->got_section()->output_section()->address()
8676 + object
->toc_base_offset());
8677 if (value
+ 0x80008000 <= 0xffffffff
8678 && !parameters
->options().output_is_position_independent())
8680 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8681 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8682 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8684 if ((insn1
& ~0xfffc) == ld_2_12
8685 && insn2
== add_2_2_12
)
8687 insn1
= lis_2
+ ha(value
);
8688 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8689 insn2
= addi_2_2
+ l(value
);
8690 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8697 if (value
+ 0x80008000 <= 0xffffffff)
8699 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8700 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8701 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
8703 if ((insn1
& ~0xfffc) == ld_2_12
8704 && insn2
== add_2_2_12
)
8706 insn1
= addis_2_12
+ ha(value
);
8707 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
8708 insn2
= addi_2_2
+ l(value
);
8709 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
8716 case elfcpp::R_POWERPC_REL16_LO
:
8717 // If we are generating a non-PIC executable, edit
8718 // 0: addis 2,12,.TOC.-0b@ha
8719 // addi 2,2,.TOC.-0b@l
8720 // used by ELFv2 global entry points to set up r2, to
8723 // if .TOC. is in range. */
8724 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
8727 && target
->abiversion() >= 2
8728 && !parameters
->options().output_is_position_independent()
8729 && rela
.get_r_addend() == d_offset
+ 4
8731 && strcmp(gsym
->name(), ".TOC.") == 0)
8733 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8734 Reltype
prev_rela(preloc
- reloc_size
);
8735 if ((prev_rela
.get_r_info()
8736 == elfcpp::elf_r_info
<size
>(r_sym
,
8737 elfcpp::R_POWERPC_REL16_HA
))
8738 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
8739 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
8741 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8742 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
8743 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8745 if ((insn1
& 0xffff0000) == addis_2_12
8746 && (insn2
& 0xffff0000) == addi_2_2
)
8748 insn1
= lis_2
+ ha(value
+ address
- 4);
8749 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
8750 insn2
= addi_2_2
+ l(value
+ address
- 4);
8751 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
8754 relinfo
->rr
->set_strategy(relnum
- 1,
8755 Relocatable_relocs::RELOC_SPECIAL
);
8756 relinfo
->rr
->set_strategy(relnum
,
8757 Relocatable_relocs::RELOC_SPECIAL
);
8767 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
8768 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
8771 case elfcpp::R_POWERPC_ADDR32
:
8772 case elfcpp::R_POWERPC_UADDR32
:
8774 overflow
= Reloc::CHECK_BITFIELD
;
8777 case elfcpp::R_POWERPC_REL32
:
8778 case elfcpp::R_POWERPC_REL16DX_HA
:
8780 overflow
= Reloc::CHECK_SIGNED
;
8783 case elfcpp::R_POWERPC_UADDR16
:
8784 overflow
= Reloc::CHECK_BITFIELD
;
8787 case elfcpp::R_POWERPC_ADDR16
:
8788 // We really should have three separate relocations,
8789 // one for 16-bit data, one for insns with 16-bit signed fields,
8790 // and one for insns with 16-bit unsigned fields.
8791 overflow
= Reloc::CHECK_BITFIELD
;
8792 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
8793 overflow
= Reloc::CHECK_LOW_INSN
;
8796 case elfcpp::R_POWERPC_ADDR16_HI
:
8797 case elfcpp::R_POWERPC_ADDR16_HA
:
8798 case elfcpp::R_POWERPC_GOT16_HI
:
8799 case elfcpp::R_POWERPC_GOT16_HA
:
8800 case elfcpp::R_POWERPC_PLT16_HI
:
8801 case elfcpp::R_POWERPC_PLT16_HA
:
8802 case elfcpp::R_POWERPC_SECTOFF_HI
:
8803 case elfcpp::R_POWERPC_SECTOFF_HA
:
8804 case elfcpp::R_PPC64_TOC16_HI
:
8805 case elfcpp::R_PPC64_TOC16_HA
:
8806 case elfcpp::R_PPC64_PLTGOT16_HI
:
8807 case elfcpp::R_PPC64_PLTGOT16_HA
:
8808 case elfcpp::R_POWERPC_TPREL16_HI
:
8809 case elfcpp::R_POWERPC_TPREL16_HA
:
8810 case elfcpp::R_POWERPC_DTPREL16_HI
:
8811 case elfcpp::R_POWERPC_DTPREL16_HA
:
8812 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8813 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8814 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8815 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8816 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8817 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8818 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8819 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8820 case elfcpp::R_POWERPC_REL16_HI
:
8821 case elfcpp::R_POWERPC_REL16_HA
:
8823 overflow
= Reloc::CHECK_HIGH_INSN
;
8826 case elfcpp::R_POWERPC_REL16
:
8827 case elfcpp::R_PPC64_TOC16
:
8828 case elfcpp::R_POWERPC_GOT16
:
8829 case elfcpp::R_POWERPC_SECTOFF
:
8830 case elfcpp::R_POWERPC_TPREL16
:
8831 case elfcpp::R_POWERPC_DTPREL16
:
8832 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8833 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8834 case elfcpp::R_POWERPC_GOT_TPREL16
:
8835 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8836 overflow
= Reloc::CHECK_LOW_INSN
;
8839 case elfcpp::R_POWERPC_ADDR24
:
8840 case elfcpp::R_POWERPC_ADDR14
:
8841 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8842 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8843 case elfcpp::R_PPC64_ADDR16_DS
:
8844 case elfcpp::R_POWERPC_REL24
:
8845 case elfcpp::R_PPC_PLTREL24
:
8846 case elfcpp::R_PPC_LOCAL24PC
:
8847 case elfcpp::R_PPC64_TPREL16_DS
:
8848 case elfcpp::R_PPC64_DTPREL16_DS
:
8849 case elfcpp::R_PPC64_TOC16_DS
:
8850 case elfcpp::R_PPC64_GOT16_DS
:
8851 case elfcpp::R_PPC64_SECTOFF_DS
:
8852 case elfcpp::R_POWERPC_REL14
:
8853 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8854 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8855 overflow
= Reloc::CHECK_SIGNED
;
8859 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8862 if (overflow
== Reloc::CHECK_LOW_INSN
8863 || overflow
== Reloc::CHECK_HIGH_INSN
)
8865 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8867 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
8868 overflow
= Reloc::CHECK_BITFIELD
;
8869 else if (overflow
== Reloc::CHECK_LOW_INSN
8870 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
8871 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
8872 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
8873 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
8874 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
8875 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
8876 overflow
= Reloc::CHECK_UNSIGNED
;
8878 overflow
= Reloc::CHECK_SIGNED
;
8881 bool maybe_dq_reloc
= false;
8882 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
8883 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
8886 case elfcpp::R_POWERPC_NONE
:
8887 case elfcpp::R_POWERPC_TLS
:
8888 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
8889 case elfcpp::R_POWERPC_GNU_VTENTRY
:
8892 case elfcpp::R_PPC64_ADDR64
:
8893 case elfcpp::R_PPC64_REL64
:
8894 case elfcpp::R_PPC64_TOC
:
8895 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8896 Reloc::addr64(view
, value
);
8899 case elfcpp::R_POWERPC_TPREL
:
8900 case elfcpp::R_POWERPC_DTPREL
:
8902 Reloc::addr64(view
, value
);
8904 status
= Reloc::addr32(view
, value
, overflow
);
8907 case elfcpp::R_PPC64_UADDR64
:
8908 Reloc::addr64_u(view
, value
);
8911 case elfcpp::R_POWERPC_ADDR32
:
8912 status
= Reloc::addr32(view
, value
, overflow
);
8915 case elfcpp::R_POWERPC_REL32
:
8916 case elfcpp::R_POWERPC_UADDR32
:
8917 status
= Reloc::addr32_u(view
, value
, overflow
);
8920 case elfcpp::R_POWERPC_ADDR24
:
8921 case elfcpp::R_POWERPC_REL24
:
8922 case elfcpp::R_PPC_PLTREL24
:
8923 case elfcpp::R_PPC_LOCAL24PC
:
8924 status
= Reloc::addr24(view
, value
, overflow
);
8927 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8928 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8929 case elfcpp::R_POWERPC_GOT_TPREL16
:
8930 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8933 // On ppc64 these are all ds form
8934 maybe_dq_reloc
= true;
8938 case elfcpp::R_POWERPC_ADDR16
:
8939 case elfcpp::R_POWERPC_REL16
:
8940 case elfcpp::R_PPC64_TOC16
:
8941 case elfcpp::R_POWERPC_GOT16
:
8942 case elfcpp::R_POWERPC_SECTOFF
:
8943 case elfcpp::R_POWERPC_TPREL16
:
8944 case elfcpp::R_POWERPC_DTPREL16
:
8945 case elfcpp::R_POWERPC_GOT_TLSGD16
:
8946 case elfcpp::R_POWERPC_GOT_TLSLD16
:
8947 case elfcpp::R_POWERPC_ADDR16_LO
:
8948 case elfcpp::R_POWERPC_REL16_LO
:
8949 case elfcpp::R_PPC64_TOC16_LO
:
8950 case elfcpp::R_POWERPC_GOT16_LO
:
8951 case elfcpp::R_POWERPC_SECTOFF_LO
:
8952 case elfcpp::R_POWERPC_TPREL16_LO
:
8953 case elfcpp::R_POWERPC_DTPREL16_LO
:
8954 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8955 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8957 status
= Reloc::addr16(view
, value
, overflow
);
8959 maybe_dq_reloc
= true;
8962 case elfcpp::R_POWERPC_UADDR16
:
8963 status
= Reloc::addr16_u(view
, value
, overflow
);
8966 case elfcpp::R_PPC64_ADDR16_HIGH
:
8967 case elfcpp::R_PPC64_TPREL16_HIGH
:
8968 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8970 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
8973 case elfcpp::R_POWERPC_ADDR16_HI
:
8974 case elfcpp::R_POWERPC_REL16_HI
:
8975 case elfcpp::R_PPC64_TOC16_HI
:
8976 case elfcpp::R_POWERPC_GOT16_HI
:
8977 case elfcpp::R_POWERPC_SECTOFF_HI
:
8978 case elfcpp::R_POWERPC_TPREL16_HI
:
8979 case elfcpp::R_POWERPC_DTPREL16_HI
:
8980 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8981 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8982 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8983 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8984 Reloc::addr16_hi(view
, value
);
8987 case elfcpp::R_PPC64_ADDR16_HIGHA
:
8988 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8989 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8991 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
8994 case elfcpp::R_POWERPC_ADDR16_HA
:
8995 case elfcpp::R_POWERPC_REL16_HA
:
8996 case elfcpp::R_PPC64_TOC16_HA
:
8997 case elfcpp::R_POWERPC_GOT16_HA
:
8998 case elfcpp::R_POWERPC_SECTOFF_HA
:
8999 case elfcpp::R_POWERPC_TPREL16_HA
:
9000 case elfcpp::R_POWERPC_DTPREL16_HA
:
9001 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9002 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9003 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9004 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9005 Reloc::addr16_ha(view
, value
);
9008 case elfcpp::R_POWERPC_REL16DX_HA
:
9009 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
9012 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9014 // R_PPC_EMB_NADDR16_LO
9017 case elfcpp::R_PPC64_ADDR16_HIGHER
:
9018 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9019 Reloc::addr16_hi2(view
, value
);
9022 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9024 // R_PPC_EMB_NADDR16_HI
9027 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
9028 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9029 Reloc::addr16_ha2(view
, value
);
9032 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9034 // R_PPC_EMB_NADDR16_HA
9037 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
9038 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9039 Reloc::addr16_hi3(view
, value
);
9042 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9047 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
9048 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9049 Reloc::addr16_ha3(view
, value
);
9052 case elfcpp::R_PPC64_DTPREL16_DS
:
9053 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9055 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9058 case elfcpp::R_PPC64_TPREL16_DS
:
9059 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9061 // R_PPC_TLSGD, R_PPC_TLSLD
9064 case elfcpp::R_PPC64_ADDR16_DS
:
9065 case elfcpp::R_PPC64_ADDR16_LO_DS
:
9066 case elfcpp::R_PPC64_TOC16_DS
:
9067 case elfcpp::R_PPC64_TOC16_LO_DS
:
9068 case elfcpp::R_PPC64_GOT16_DS
:
9069 case elfcpp::R_PPC64_GOT16_LO_DS
:
9070 case elfcpp::R_PPC64_SECTOFF_DS
:
9071 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9072 maybe_dq_reloc
= true;
9075 case elfcpp::R_POWERPC_ADDR14
:
9076 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9077 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9078 case elfcpp::R_POWERPC_REL14
:
9079 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9080 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9081 status
= Reloc::addr14(view
, value
, overflow
);
9084 case elfcpp::R_POWERPC_COPY
:
9085 case elfcpp::R_POWERPC_GLOB_DAT
:
9086 case elfcpp::R_POWERPC_JMP_SLOT
:
9087 case elfcpp::R_POWERPC_RELATIVE
:
9088 case elfcpp::R_POWERPC_DTPMOD
:
9089 case elfcpp::R_PPC64_JMP_IREL
:
9090 case elfcpp::R_POWERPC_IRELATIVE
:
9091 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9092 _("unexpected reloc %u in object file"),
9096 case elfcpp::R_PPC64_TOCSAVE
:
9102 Symbol_location loc
;
9103 loc
.object
= relinfo
->object
;
9104 loc
.shndx
= relinfo
->data_shndx
;
9105 loc
.offset
= rela
.get_r_offset();
9106 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
9107 if (p
!= target
->tocsave_loc().end())
9109 // If we've generated plt calls using this tocsave, then
9110 // the nop needs to be changed to save r2.
9111 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9112 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
9113 elfcpp::Swap
<32, big_endian
>::
9114 writeval(iview
, std_2_1
+ target
->stk_toc());
9119 case elfcpp::R_PPC_EMB_SDA2I16
:
9120 case elfcpp::R_PPC_EMB_SDA2REL
:
9123 // R_PPC64_TLSGD, R_PPC64_TLSLD
9126 case elfcpp::R_POWERPC_PLT32
:
9127 case elfcpp::R_POWERPC_PLTREL32
:
9128 case elfcpp::R_POWERPC_PLT16_LO
:
9129 case elfcpp::R_POWERPC_PLT16_HI
:
9130 case elfcpp::R_POWERPC_PLT16_HA
:
9131 case elfcpp::R_PPC_SDAREL16
:
9132 case elfcpp::R_POWERPC_ADDR30
:
9133 case elfcpp::R_PPC64_PLT64
:
9134 case elfcpp::R_PPC64_PLTREL64
:
9135 case elfcpp::R_PPC64_PLTGOT16
:
9136 case elfcpp::R_PPC64_PLTGOT16_LO
:
9137 case elfcpp::R_PPC64_PLTGOT16_HI
:
9138 case elfcpp::R_PPC64_PLTGOT16_HA
:
9139 case elfcpp::R_PPC64_PLT16_LO_DS
:
9140 case elfcpp::R_PPC64_PLTGOT16_DS
:
9141 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
9142 case elfcpp::R_PPC_EMB_RELSDA
:
9143 case elfcpp::R_PPC_TOC16
:
9146 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9147 _("unsupported reloc %u"),
9155 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9157 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
9158 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9159 && (insn
& 3) == 1))
9160 status
= Reloc::addr16_dq(view
, value
, overflow
);
9162 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9163 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9164 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
9165 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
9166 status
= Reloc::addr16_ds(view
, value
, overflow
);
9168 status
= Reloc::addr16(view
, value
, overflow
);
9171 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
9174 && gsym
->is_undefined()
9175 && is_branch_reloc(r_type
))))
9177 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9178 _("relocation overflow"));
9180 gold_info(_("try relinking with a smaller --stub-group-size"));
9186 // Relocate section data.
9188 template<int size
, bool big_endian
>
9190 Target_powerpc
<size
, big_endian
>::relocate_section(
9191 const Relocate_info
<size
, big_endian
>* relinfo
,
9192 unsigned int sh_type
,
9193 const unsigned char* prelocs
,
9195 Output_section
* output_section
,
9196 bool needs_special_offset_handling
,
9197 unsigned char* view
,
9199 section_size_type view_size
,
9200 const Reloc_symbol_changes
* reloc_symbol_changes
)
9202 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
9203 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
9204 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
9205 Powerpc_comdat_behavior
;
9206 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9209 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9211 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
9212 Powerpc_comdat_behavior
, Classify_reloc
>(
9218 needs_special_offset_handling
,
9222 reloc_symbol_changes
);
9225 template<int size
, bool big_endian
>
9226 class Powerpc_scan_relocatable_reloc
9229 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9230 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9231 static const int sh_type
= elfcpp::SHT_RELA
;
9233 // Return the symbol referred to by the relocation.
9234 static inline unsigned int
9235 get_r_sym(const Reltype
* reloc
)
9236 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
9238 // Return the type of the relocation.
9239 static inline unsigned int
9240 get_r_type(const Reltype
* reloc
)
9241 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
9243 // Return the strategy to use for a local symbol which is not a
9244 // section symbol, given the relocation type.
9245 inline Relocatable_relocs::Reloc_strategy
9246 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
9248 if (r_type
== 0 && r_sym
== 0)
9249 return Relocatable_relocs::RELOC_DISCARD
;
9250 return Relocatable_relocs::RELOC_COPY
;
9253 // Return the strategy to use for a local symbol which is a section
9254 // symbol, given the relocation type.
9255 inline Relocatable_relocs::Reloc_strategy
9256 local_section_strategy(unsigned int, Relobj
*)
9258 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
9261 // Return the strategy to use for a global symbol, given the
9262 // relocation type, the object, and the symbol index.
9263 inline Relocatable_relocs::Reloc_strategy
9264 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
9266 if (r_type
== elfcpp::R_PPC_PLTREL24
)
9267 return Relocatable_relocs::RELOC_SPECIAL
;
9268 return Relocatable_relocs::RELOC_COPY
;
9272 // Scan the relocs during a relocatable link.
9274 template<int size
, bool big_endian
>
9276 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
9277 Symbol_table
* symtab
,
9279 Sized_relobj_file
<size
, big_endian
>* object
,
9280 unsigned int data_shndx
,
9281 unsigned int sh_type
,
9282 const unsigned char* prelocs
,
9284 Output_section
* output_section
,
9285 bool needs_special_offset_handling
,
9286 size_t local_symbol_count
,
9287 const unsigned char* plocal_symbols
,
9288 Relocatable_relocs
* rr
)
9290 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
9292 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9294 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
9302 needs_special_offset_handling
,
9308 // Scan the relocs for --emit-relocs.
9310 template<int size
, bool big_endian
>
9312 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
9313 Symbol_table
* symtab
,
9315 Sized_relobj_file
<size
, big_endian
>* object
,
9316 unsigned int data_shndx
,
9317 unsigned int sh_type
,
9318 const unsigned char* prelocs
,
9320 Output_section
* output_section
,
9321 bool needs_special_offset_handling
,
9322 size_t local_symbol_count
,
9323 const unsigned char* plocal_syms
,
9324 Relocatable_relocs
* rr
)
9326 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9328 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
9329 Emit_relocs_strategy
;
9331 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9333 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
9341 needs_special_offset_handling
,
9347 // Emit relocations for a section.
9348 // This is a modified version of the function by the same name in
9349 // target-reloc.h. Using relocate_special_relocatable for
9350 // R_PPC_PLTREL24 would require duplication of the entire body of the
9351 // loop, so we may as well duplicate the whole thing.
9353 template<int size
, bool big_endian
>
9355 Target_powerpc
<size
, big_endian
>::relocate_relocs(
9356 const Relocate_info
<size
, big_endian
>* relinfo
,
9357 unsigned int sh_type
,
9358 const unsigned char* prelocs
,
9360 Output_section
* output_section
,
9361 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
9363 Address view_address
,
9365 unsigned char* reloc_view
,
9366 section_size_type reloc_view_size
)
9368 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9370 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9371 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
9372 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9373 // Offset from start of insn to d-field reloc.
9374 const int d_offset
= big_endian
? 2 : 0;
9376 Powerpc_relobj
<size
, big_endian
>* const object
9377 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
9378 const unsigned int local_count
= object
->local_symbol_count();
9379 unsigned int got2_shndx
= object
->got2_shndx();
9380 Address got2_addend
= 0;
9381 if (got2_shndx
!= 0)
9383 got2_addend
= object
->get_output_section_offset(got2_shndx
);
9384 gold_assert(got2_addend
!= invalid_address
);
9387 unsigned char* pwrite
= reloc_view
;
9388 bool zap_next
= false;
9389 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
9391 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
9392 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
9395 Reltype
reloc(prelocs
);
9396 Reltype_write
reloc_write(pwrite
);
9398 Address offset
= reloc
.get_r_offset();
9399 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
9400 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
9401 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
9402 const unsigned int orig_r_sym
= r_sym
;
9403 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
9404 = reloc
.get_r_addend();
9405 const Symbol
* gsym
= NULL
;
9409 // We could arrange to discard these and other relocs for
9410 // tls optimised sequences in the strategy methods, but for
9411 // now do as BFD ld does.
9412 r_type
= elfcpp::R_POWERPC_NONE
;
9416 // Get the new symbol index.
9417 Output_section
* os
= NULL
;
9418 if (r_sym
< local_count
)
9422 case Relocatable_relocs::RELOC_COPY
:
9423 case Relocatable_relocs::RELOC_SPECIAL
:
9426 r_sym
= object
->symtab_index(r_sym
);
9427 gold_assert(r_sym
!= -1U);
9431 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9433 // We are adjusting a section symbol. We need to find
9434 // the symbol table index of the section symbol for
9435 // the output section corresponding to input section
9436 // in which this symbol is defined.
9437 gold_assert(r_sym
< local_count
);
9439 unsigned int shndx
=
9440 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9441 gold_assert(is_ordinary
);
9442 os
= object
->output_section(shndx
);
9443 gold_assert(os
!= NULL
);
9444 gold_assert(os
->needs_symtab_index());
9445 r_sym
= os
->symtab_index();
9455 gsym
= object
->global_symbol(r_sym
);
9456 gold_assert(gsym
!= NULL
);
9457 if (gsym
->is_forwarder())
9458 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9460 gold_assert(gsym
->has_symtab_index());
9461 r_sym
= gsym
->symtab_index();
9464 // Get the new offset--the location in the output section where
9465 // this relocation should be applied.
9466 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9467 offset
+= offset_in_output_section
;
9470 section_offset_type sot_offset
=
9471 convert_types
<section_offset_type
, Address
>(offset
);
9472 section_offset_type new_sot_offset
=
9473 output_section
->output_offset(object
, relinfo
->data_shndx
,
9475 gold_assert(new_sot_offset
!= -1);
9476 offset
= new_sot_offset
;
9479 // In an object file, r_offset is an offset within the section.
9480 // In an executable or dynamic object, generated by
9481 // --emit-relocs, r_offset is an absolute address.
9482 if (!parameters
->options().relocatable())
9484 offset
+= view_address
;
9485 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9486 offset
-= offset_in_output_section
;
9489 // Handle the reloc addend based on the strategy.
9490 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9492 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9494 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9495 gold_assert(os
!= NULL
);
9496 addend
= psymval
->value(object
, addend
) - os
->address();
9498 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9502 if (addend
>= 32768)
9503 addend
+= got2_addend
;
9505 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9507 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9510 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9512 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9513 addend
-= d_offset
+ 4;
9519 if (!parameters
->options().relocatable())
9521 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9522 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9523 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9524 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9526 // First instruction of a global dynamic sequence,
9528 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9529 switch (this->optimize_tls_gd(final
))
9531 case tls::TLSOPT_TO_IE
:
9532 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9533 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9535 case tls::TLSOPT_TO_LE
:
9536 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9537 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9538 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9541 r_type
= elfcpp::R_POWERPC_NONE
;
9549 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9550 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9551 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9552 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9554 // First instruction of a local dynamic sequence,
9556 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9558 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9559 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9561 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9562 const Output_section
* os
= relinfo
->layout
->tls_segment()
9564 gold_assert(os
!= NULL
);
9565 gold_assert(os
->needs_symtab_index());
9566 r_sym
= os
->symtab_index();
9567 addend
= dtp_offset
;
9571 r_type
= elfcpp::R_POWERPC_NONE
;
9576 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9577 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9578 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9579 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9581 // First instruction of initial exec sequence.
9582 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9583 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9585 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9586 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9587 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9590 r_type
= elfcpp::R_POWERPC_NONE
;
9595 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9596 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9598 // Second instruction of a global dynamic sequence,
9599 // the __tls_get_addr call
9600 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9601 switch (this->optimize_tls_gd(final
))
9603 case tls::TLSOPT_TO_IE
:
9604 r_type
= elfcpp::R_POWERPC_NONE
;
9607 case tls::TLSOPT_TO_LE
:
9608 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9616 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
9617 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
9619 // Second instruction of a local dynamic sequence,
9620 // the __tls_get_addr call
9621 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9623 const Output_section
* os
= relinfo
->layout
->tls_segment()
9625 gold_assert(os
!= NULL
);
9626 gold_assert(os
->needs_symtab_index());
9627 r_sym
= os
->symtab_index();
9628 addend
= dtp_offset
;
9629 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9634 else if (r_type
== elfcpp::R_POWERPC_TLS
)
9636 // Second instruction of an initial exec sequence
9637 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9638 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9640 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9646 reloc_write
.put_r_offset(offset
);
9647 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
9648 reloc_write
.put_r_addend(addend
);
9650 pwrite
+= reloc_size
;
9653 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
9654 == reloc_view_size
);
9657 // Return the value to use for a dynamic symbol which requires special
9658 // treatment. This is how we support equality comparisons of function
9659 // pointers across shared library boundaries, as described in the
9660 // processor specific ABI supplement.
9662 template<int size
, bool big_endian
>
9664 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
9668 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
9669 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9670 p
!= this->stub_tables_
.end();
9673 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
9674 = (*p
)->find_plt_call_entry(gsym
);
9676 return (*p
)->stub_address() + ent
->off_
;
9679 else if (this->abiversion() >= 2)
9681 Address off
= this->glink_section()->find_global_entry(gsym
);
9682 if (off
!= invalid_address
)
9683 return this->glink_section()->global_entry_address() + off
;
9688 // Return the PLT address to use for a local symbol.
9689 template<int size
, bool big_endian
>
9691 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
9692 const Relobj
* object
,
9693 unsigned int symndx
) const
9697 const Sized_relobj
<size
, big_endian
>* relobj
9698 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
9699 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9700 p
!= this->stub_tables_
.end();
9703 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
9704 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
9706 return (*p
)->stub_address() + ent
->off_
;
9712 // Return the PLT address to use for a global symbol.
9713 template<int size
, bool big_endian
>
9715 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
9716 const Symbol
* gsym
) const
9720 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
9721 p
!= this->stub_tables_
.end();
9724 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
9725 = (*p
)->find_plt_call_entry(gsym
);
9727 return (*p
)->stub_address() + ent
->off_
;
9730 else if (this->abiversion() >= 2)
9732 Address off
= this->glink_section()->find_global_entry(gsym
);
9733 if (off
!= invalid_address
)
9734 return this->glink_section()->global_entry_address() + off
;
9739 // Return the offset to use for the GOT_INDX'th got entry which is
9740 // for a local tls symbol specified by OBJECT, SYMNDX.
9741 template<int size
, bool big_endian
>
9743 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
9744 const Relobj
* object
,
9745 unsigned int symndx
,
9746 unsigned int got_indx
) const
9748 const Powerpc_relobj
<size
, big_endian
>* ppc_object
9749 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
9750 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
9752 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9753 got_type
<= GOT_TYPE_TPREL
;
9754 got_type
= Got_type(got_type
+ 1))
9755 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
9757 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
9758 if (got_type
== GOT_TYPE_TLSGD
)
9760 if (off
== got_indx
* (size
/ 8))
9762 if (got_type
== GOT_TYPE_TPREL
)
9772 // Return the offset to use for the GOT_INDX'th got entry which is
9773 // for global tls symbol GSYM.
9774 template<int size
, bool big_endian
>
9776 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
9778 unsigned int got_indx
) const
9780 if (gsym
->type() == elfcpp::STT_TLS
)
9782 for (Got_type got_type
= GOT_TYPE_TLSGD
;
9783 got_type
<= GOT_TYPE_TPREL
;
9784 got_type
= Got_type(got_type
+ 1))
9785 if (gsym
->has_got_offset(got_type
))
9787 unsigned int off
= gsym
->got_offset(got_type
);
9788 if (got_type
== GOT_TYPE_TLSGD
)
9790 if (off
== got_indx
* (size
/ 8))
9792 if (got_type
== GOT_TYPE_TPREL
)
9802 // The selector for powerpc object files.
9804 template<int size
, bool big_endian
>
9805 class Target_selector_powerpc
: public Target_selector
9808 Target_selector_powerpc()
9809 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
9812 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
9813 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
9815 ? (big_endian
? "elf64ppc" : "elf64lppc")
9816 : (big_endian
? "elf32ppc" : "elf32lppc")))
9820 do_instantiate_target()
9821 { return new Target_powerpc
<size
, big_endian
>(); }
9824 Target_selector_powerpc
<32, true> target_selector_ppc32
;
9825 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
9826 Target_selector_powerpc
<64, true> target_selector_ppc64
;
9827 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
9829 // Instantiate these constants for -O0
9830 template<int size
, bool big_endian
>
9831 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
9832 template<int size
, bool big_endian
>
9833 const typename Output_data_glink
<size
, big_endian
>::Address
9834 Output_data_glink
<size
, big_endian
>::invalid_address
;
9835 template<int size
, bool big_endian
>
9836 const typename Stub_table
<size
, big_endian
>::Address
9837 Stub_table
<size
, big_endian
>::invalid_address
;
9838 template<int size
, bool big_endian
>
9839 const typename Target_powerpc
<size
, big_endian
>::Address
9840 Target_powerpc
<size
, big_endian
>::invalid_address
;
9842 } // End anonymous namespace.