1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2019 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"
44 #include "attributes.h"
51 template<int size
, bool big_endian
>
52 class Output_data_plt_powerpc
;
54 template<int size
, bool big_endian
>
55 class Output_data_brlt_powerpc
;
57 template<int size
, bool big_endian
>
58 class Output_data_got_powerpc
;
60 template<int size
, bool big_endian
>
61 class Output_data_glink
;
63 template<int size
, bool big_endian
>
66 template<int size
, bool big_endian
>
67 class Output_data_save_res
;
69 template<int size
, bool big_endian
>
72 struct Stub_table_owner
75 : output_section(NULL
), owner(NULL
)
78 Output_section
* output_section
;
79 const Output_section::Input_section
* owner
;
82 inline bool is_branch_reloc(unsigned int);
85 inline bool is_plt16_reloc(unsigned int);
87 // Counter incremented on every Powerpc_relobj constructed.
88 static uint32_t object_id
= 0;
90 template<int size
, bool big_endian
>
91 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
94 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
95 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
96 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
98 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
99 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
100 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
101 uniq_(object_id
++), special_(0), relatoc_(0), toc_(0),
102 has_small_toc_reloc_(false), opd_valid_(false),
103 e_flags_(ehdr
.get_e_flags()), no_toc_opt_(), opd_ent_(),
104 access_from_map_(), has14_(), stub_table_index_(), st_other_(),
105 attributes_section_data_(NULL
)
107 this->set_abiversion(0);
111 { delete this->attributes_section_data_
; }
113 // Read the symbols then set up st_other vector.
115 do_read_symbols(Read_symbols_data
*);
117 // Arrange to always relocate .toc first.
119 do_relocate_sections(
120 const Symbol_table
* symtab
, const Layout
* layout
,
121 const unsigned char* pshdrs
, Output_file
* of
,
122 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
);
124 // The .toc section index.
131 // Mark .toc entry at OFF as not optimizable.
133 set_no_toc_opt(Address off
)
135 if (this->no_toc_opt_
.empty())
136 this->no_toc_opt_
.resize(this->section_size(this->toc_shndx())
139 if (off
< this->no_toc_opt_
.size())
140 this->no_toc_opt_
[off
] = true;
143 // Mark the entire .toc as not optimizable.
147 this->no_toc_opt_
.resize(1);
148 this->no_toc_opt_
[0] = true;
151 // Return true if code using the .toc entry at OFF should not be edited.
153 no_toc_opt(Address off
) const
155 if (this->no_toc_opt_
.empty())
158 if (off
>= this->no_toc_opt_
.size())
160 return this->no_toc_opt_
[off
];
163 // The .got2 section shndx.
168 return this->special_
;
173 // The .opd section shndx.
180 return this->special_
;
183 // Init OPD entry arrays.
185 init_opd(size_t opd_size
)
187 size_t count
= this->opd_ent_ndx(opd_size
);
188 this->opd_ent_
.resize(count
);
191 // Return section and offset of function entry for .opd + R_OFF.
193 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
195 size_t ndx
= this->opd_ent_ndx(r_off
);
196 gold_assert(ndx
< this->opd_ent_
.size());
197 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
199 *value
= this->opd_ent_
[ndx
].off
;
200 return this->opd_ent_
[ndx
].shndx
;
203 // Set section and offset of function entry for .opd + R_OFF.
205 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
207 size_t ndx
= this->opd_ent_ndx(r_off
);
208 gold_assert(ndx
< this->opd_ent_
.size());
209 this->opd_ent_
[ndx
].shndx
= shndx
;
210 this->opd_ent_
[ndx
].off
= value
;
213 // Return discard flag for .opd + R_OFF.
215 get_opd_discard(Address r_off
) const
217 size_t ndx
= this->opd_ent_ndx(r_off
);
218 gold_assert(ndx
< this->opd_ent_
.size());
219 return this->opd_ent_
[ndx
].discard
;
222 // Set discard flag for .opd + R_OFF.
224 set_opd_discard(Address r_off
)
226 size_t ndx
= this->opd_ent_ndx(r_off
);
227 gold_assert(ndx
< this->opd_ent_
.size());
228 this->opd_ent_
[ndx
].discard
= true;
233 { return this->opd_valid_
; }
237 { this->opd_valid_
= true; }
239 // Examine .rela.opd to build info about function entry points.
241 scan_opd_relocs(size_t reloc_count
,
242 const unsigned char* prelocs
,
243 const unsigned char* plocal_syms
);
245 // Returns true if a code sequence loading a TOC entry can be
246 // converted into code calculating a TOC pointer relative offset.
248 make_toc_relative(Target_powerpc
<size
, big_endian
>* target
,
251 // Perform the Sized_relobj_file method, then set up opd info from
254 do_read_relocs(Read_relocs_data
*);
257 do_find_special_sections(Read_symbols_data
* sd
);
259 // Adjust this local symbol value. Return false if the symbol
260 // should be discarded from the output file.
262 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
264 if (size
== 64 && this->opd_shndx() != 0)
267 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
269 if (this->get_opd_discard(lv
->input_value()))
277 { return &this->access_from_map_
; }
279 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
280 // section at DST_OFF.
282 add_reference(Relobj
* src_obj
,
283 unsigned int src_indx
,
284 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
286 Section_id
src_id(src_obj
, src_indx
);
287 this->access_from_map_
[dst_off
].insert(src_id
);
290 // Add a reference to the code section specified by the .opd entry
293 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
295 size_t ndx
= this->opd_ent_ndx(dst_off
);
296 if (ndx
>= this->opd_ent_
.size())
297 this->opd_ent_
.resize(ndx
+ 1);
298 this->opd_ent_
[ndx
].gc_mark
= true;
302 process_gc_mark(Symbol_table
* symtab
)
304 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
305 if (this->opd_ent_
[i
].gc_mark
)
307 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
308 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
312 // Return offset in output GOT section that this object will use
313 // as a TOC pointer. Won't be just a constant with multi-toc support.
315 toc_base_offset() const
319 set_has_small_toc_reloc()
320 { has_small_toc_reloc_
= true; }
323 has_small_toc_reloc() const
324 { return has_small_toc_reloc_
; }
327 set_has_14bit_branch(unsigned int shndx
)
329 if (shndx
>= this->has14_
.size())
330 this->has14_
.resize(shndx
+ 1);
331 this->has14_
[shndx
] = true;
335 has_14bit_branch(unsigned int shndx
) const
336 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
339 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
341 if (shndx
>= this->stub_table_index_
.size())
342 this->stub_table_index_
.resize(shndx
+ 1, -1);
343 this->stub_table_index_
[shndx
] = stub_index
;
346 Stub_table
<size
, big_endian
>*
347 stub_table(unsigned int shndx
)
349 if (shndx
< this->stub_table_index_
.size())
351 Target_powerpc
<size
, big_endian
>* target
352 = static_cast<Target_powerpc
<size
, big_endian
>*>(
353 parameters
->sized_target
<size
, big_endian
>());
354 unsigned int indx
= this->stub_table_index_
[shndx
];
355 if (indx
< target
->stub_tables().size())
356 return target
->stub_tables()[indx
];
364 this->stub_table_index_
.clear();
369 { return this->uniq_
; }
373 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
375 // Set ABI version for input and output
377 set_abiversion(int ver
);
380 st_other (unsigned int symndx
) const
382 return this->st_other_
[symndx
];
386 ppc64_local_entry_offset(const Symbol
* sym
) const
387 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
390 ppc64_local_entry_offset(unsigned int symndx
) const
391 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
393 // The contents of the .gnu.attributes section if there is one.
394 const Attributes_section_data
*
395 attributes_section_data() const
396 { return this->attributes_section_data_
; }
407 // Return index into opd_ent_ array for .opd entry at OFF.
408 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
409 // apart when the language doesn't use the last 8-byte word, the
410 // environment pointer. Thus dividing the entry section offset by
411 // 16 will give an index into opd_ent_ that works for either layout
412 // of .opd. (It leaves some elements of the vector unused when .opd
413 // entries are spaced 24 bytes apart, but we don't know the spacing
414 // until relocations are processed, and in any case it is possible
415 // for an object to have some entries spaced 16 bytes apart and
416 // others 24 bytes apart.)
418 opd_ent_ndx(size_t off
) const
421 // Per object unique identifier
424 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
425 unsigned int special_
;
427 // For 64-bit the .rela.toc and .toc section shdnx.
428 unsigned int relatoc_
;
431 // For 64-bit, whether this object uses small model relocs to access
433 bool has_small_toc_reloc_
;
435 // Set at the start of gc_process_relocs, when we know opd_ent_
436 // vector is valid. The flag could be made atomic and set in
437 // do_read_relocs with memory_order_release and then tested with
438 // memory_order_acquire, potentially resulting in fewer entries in
443 elfcpp::Elf_Word e_flags_
;
445 // For 64-bit, an array with one entry per 64-bit word in the .toc
446 // section, set if accesses using that word cannot be optimised.
447 std::vector
<bool> no_toc_opt_
;
449 // The first 8-byte word of an OPD entry gives the address of the
450 // entry point of the function. Relocatable object files have a
451 // relocation on this word. The following vector records the
452 // section and offset specified by these relocations.
453 std::vector
<Opd_ent
> opd_ent_
;
455 // References made to this object's .opd section when running
456 // gc_process_relocs for another object, before the opd_ent_ vector
457 // is valid for this object.
458 Access_from access_from_map_
;
460 // Whether input section has a 14-bit branch reloc.
461 std::vector
<bool> has14_
;
463 // The stub table to use for a given input section.
464 std::vector
<unsigned int> stub_table_index_
;
466 // ELF st_other field for local symbols.
467 std::vector
<unsigned char> st_other_
;
469 // Object attributes if there is a .gnu.attributes section.
470 Attributes_section_data
* attributes_section_data_
;
473 template<int size
, bool big_endian
>
474 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
477 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
479 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
480 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
481 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
482 opd_shndx_(0), e_flags_(ehdr
.get_e_flags()), opd_ent_(),
483 attributes_section_data_(NULL
)
485 this->set_abiversion(0);
489 { delete this->attributes_section_data_
; }
491 // Call Sized_dynobj::do_read_symbols to read the symbols then
492 // read .opd from a dynamic object, filling in opd_ent_ vector,
494 do_read_symbols(Read_symbols_data
*);
496 // The .opd section shndx.
500 return this->opd_shndx_
;
503 // The .opd section address.
507 return this->opd_address_
;
510 // Init OPD entry arrays.
512 init_opd(size_t opd_size
)
514 size_t count
= this->opd_ent_ndx(opd_size
);
515 this->opd_ent_
.resize(count
);
518 // Return section and offset of function entry for .opd + R_OFF.
520 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
522 size_t ndx
= this->opd_ent_ndx(r_off
);
523 gold_assert(ndx
< this->opd_ent_
.size());
524 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
526 *value
= this->opd_ent_
[ndx
].off
;
527 return this->opd_ent_
[ndx
].shndx
;
530 // Set section and offset of function entry for .opd + R_OFF.
532 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
534 size_t ndx
= this->opd_ent_ndx(r_off
);
535 gold_assert(ndx
< this->opd_ent_
.size());
536 this->opd_ent_
[ndx
].shndx
= shndx
;
537 this->opd_ent_
[ndx
].off
= value
;
542 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
544 // Set ABI version for input and output.
546 set_abiversion(int ver
);
548 // The contents of the .gnu.attributes section if there is one.
549 const Attributes_section_data
*
550 attributes_section_data() const
551 { return this->attributes_section_data_
; }
554 // Used to specify extent of executable sections.
557 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
558 : start(start_
), len(len_
), shndx(shndx_
)
562 operator<(const Sec_info
& that
) const
563 { return this->start
< that
.start
; }
576 // Return index into opd_ent_ array for .opd entry at OFF.
578 opd_ent_ndx(size_t off
) const
581 // For 64-bit the .opd section shndx and address.
582 unsigned int opd_shndx_
;
583 Address opd_address_
;
586 elfcpp::Elf_Word e_flags_
;
588 // The first 8-byte word of an OPD entry gives the address of the
589 // entry point of the function. Records the section and offset
590 // corresponding to the address. Note that in dynamic objects,
591 // offset is *not* relative to the section.
592 std::vector
<Opd_ent
> opd_ent_
;
594 // Object attributes if there is a .gnu.attributes section.
595 Attributes_section_data
* attributes_section_data_
;
598 // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
599 // base class will emit.
601 template<int sh_type
, int size
, bool big_endian
>
602 class Powerpc_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
605 Powerpc_copy_relocs()
606 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_POWERPC_COPY
)
609 // Emit any saved relocations which turn out to be needed. This is
610 // called after all the relocs have been scanned.
612 emit(Output_data_reloc
<sh_type
, true, size
, big_endian
>*);
615 template<int size
, bool big_endian
>
616 class Target_powerpc
: public Sized_target
<size
, big_endian
>
620 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
621 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
622 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
623 typedef Unordered_set
<Symbol_location
, Symbol_location_hash
> Tocsave_loc
;
624 static const Address invalid_address
= static_cast<Address
>(0) - 1;
625 // Offset of tp and dtp pointers from start of TLS block.
626 static const Address tp_offset
= 0x7000;
627 static const Address dtp_offset
= 0x8000;
630 : Sized_target
<size
, big_endian
>(&powerpc_info
),
631 got_(NULL
), plt_(NULL
), iplt_(NULL
), lplt_(NULL
), brlt_section_(NULL
),
632 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(),
633 tlsld_got_offset_(-1U),
634 stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(),
635 plt_thread_safe_(false), plt_localentry0_(false),
636 plt_localentry0_init_(false), has_localentry0_(false),
637 has_tls_get_addr_opt_(false),
638 relax_failed_(false), relax_fail_count_(0),
639 stub_group_size_(0), savres_section_(0),
640 tls_get_addr_(NULL
), tls_get_addr_opt_(NULL
),
641 attributes_section_data_(NULL
),
642 last_fp_(NULL
), last_ld_(NULL
), last_vec_(NULL
), last_struct_(NULL
)
646 // Process the relocations to determine unreferenced sections for
647 // garbage collection.
649 gc_process_relocs(Symbol_table
* symtab
,
651 Sized_relobj_file
<size
, big_endian
>* object
,
652 unsigned int data_shndx
,
653 unsigned int sh_type
,
654 const unsigned char* prelocs
,
656 Output_section
* output_section
,
657 bool needs_special_offset_handling
,
658 size_t local_symbol_count
,
659 const unsigned char* plocal_symbols
);
661 // Scan the relocations to look for symbol adjustments.
663 scan_relocs(Symbol_table
* symtab
,
665 Sized_relobj_file
<size
, big_endian
>* object
,
666 unsigned int data_shndx
,
667 unsigned int sh_type
,
668 const unsigned char* prelocs
,
670 Output_section
* output_section
,
671 bool needs_special_offset_handling
,
672 size_t local_symbol_count
,
673 const unsigned char* plocal_symbols
);
675 // Map input .toc section to output .got section.
677 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
679 if (size
== 64 && strcmp(name
, ".toc") == 0)
687 // Provide linker defined save/restore functions.
689 define_save_restore_funcs(Layout
*, Symbol_table
*);
691 // No stubs unless a final link.
694 { return !parameters
->options().relocatable(); }
697 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
700 do_plt_fde_location(const Output_data
*, unsigned char*,
701 uint64_t*, off_t
*) const;
703 // Stash info about branches, for stub generation.
705 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
706 unsigned int data_shndx
, Address r_offset
,
707 unsigned int r_type
, unsigned int r_sym
, Address addend
)
709 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
710 this->branch_info_
.push_back(info
);
711 if (r_type
== elfcpp::R_POWERPC_REL14
712 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
713 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
714 ppc_object
->set_has_14bit_branch(data_shndx
);
717 // Return whether the last branch is a plt call, and if so, mark the
718 // branch as having an R_PPC64_TOCSAVE.
720 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
721 unsigned int data_shndx
, Address r_offset
, Symbol_table
* symtab
)
724 && !this->branch_info_
.empty()
725 && this->branch_info_
.back().mark_pltcall(ppc_object
, data_shndx
,
726 r_offset
, this, symtab
));
729 // Say the given location, that of a nop in a function prologue with
730 // an R_PPC64_TOCSAVE reloc, will be used to save r2.
731 // R_PPC64_TOCSAVE relocs on nops following calls point at this nop.
733 add_tocsave(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
734 unsigned int shndx
, Address offset
)
737 loc
.object
= ppc_object
;
740 this->tocsave_loc_
.insert(loc
);
747 return this->tocsave_loc_
;
751 do_define_standard_symbols(Symbol_table
*, Layout
*);
753 // Finalize the sections.
755 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
757 // Return the value to use for a dynamic which requires special
760 do_dynsym_value(const Symbol
*) const;
762 // Return the PLT address to use for a local symbol.
764 do_plt_address_for_local(const Relobj
*, unsigned int) const;
766 // Return the PLT address to use for a global symbol.
768 do_plt_address_for_global(const Symbol
*) const;
770 // Return the offset to use for the GOT_INDX'th got entry which is
771 // for a local tls symbol specified by OBJECT, SYMNDX.
773 do_tls_offset_for_local(const Relobj
* object
,
775 unsigned int got_indx
) const;
777 // Return the offset to use for the GOT_INDX'th got entry which is
778 // for global tls symbol GSYM.
780 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
783 do_function_location(Symbol_location
*) const;
786 do_can_check_for_function_pointers() const
789 // Adjust -fsplit-stack code which calls non-split-stack code.
791 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
792 section_offset_type fnoffset
, section_size_type fnsize
,
793 const unsigned char* prelocs
, size_t reloc_count
,
794 unsigned char* view
, section_size_type view_size
,
795 std::string
* from
, std::string
* to
) const;
797 // Relocate a section.
799 relocate_section(const Relocate_info
<size
, big_endian
>*,
800 unsigned int sh_type
,
801 const unsigned char* prelocs
,
803 Output_section
* output_section
,
804 bool needs_special_offset_handling
,
806 Address view_address
,
807 section_size_type view_size
,
808 const Reloc_symbol_changes
*);
810 // Scan the relocs during a relocatable link.
812 scan_relocatable_relocs(Symbol_table
* symtab
,
814 Sized_relobj_file
<size
, big_endian
>* object
,
815 unsigned int data_shndx
,
816 unsigned int sh_type
,
817 const unsigned char* prelocs
,
819 Output_section
* output_section
,
820 bool needs_special_offset_handling
,
821 size_t local_symbol_count
,
822 const unsigned char* plocal_symbols
,
823 Relocatable_relocs
*);
825 // Scan the relocs for --emit-relocs.
827 emit_relocs_scan(Symbol_table
* symtab
,
829 Sized_relobj_file
<size
, big_endian
>* object
,
830 unsigned int data_shndx
,
831 unsigned int sh_type
,
832 const unsigned char* prelocs
,
834 Output_section
* output_section
,
835 bool needs_special_offset_handling
,
836 size_t local_symbol_count
,
837 const unsigned char* plocal_syms
,
838 Relocatable_relocs
* rr
);
840 // Emit relocations for a section.
842 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
843 unsigned int sh_type
,
844 const unsigned char* prelocs
,
846 Output_section
* output_section
,
847 typename
elfcpp::Elf_types
<size
>::Elf_Off
848 offset_in_output_section
,
850 Address view_address
,
852 unsigned char* reloc_view
,
853 section_size_type reloc_view_size
);
855 // Return whether SYM is defined by the ABI.
857 do_is_defined_by_abi(const Symbol
* sym
) const
859 return strcmp(sym
->name(), "__tls_get_addr") == 0;
862 // Return the size of the GOT section.
866 gold_assert(this->got_
!= NULL
);
867 return this->got_
->data_size();
870 // Get the PLT section.
871 const Output_data_plt_powerpc
<size
, big_endian
>*
874 gold_assert(this->plt_
!= NULL
);
878 // Get the IPLT section.
879 const Output_data_plt_powerpc
<size
, big_endian
>*
882 gold_assert(this->iplt_
!= NULL
);
886 // Get the LPLT section.
887 const Output_data_plt_powerpc
<size
, big_endian
>*
893 // Return the plt offset and section for the given global sym.
895 plt_off(const Symbol
* gsym
,
896 const Output_data_plt_powerpc
<size
, big_endian
>** sec
) const
898 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
899 && gsym
->can_use_relative_reloc(false))
900 *sec
= this->iplt_section();
902 *sec
= this->plt_section();
903 return gsym
->plt_offset();
906 // Return the plt offset and section for the given local sym.
908 plt_off(const Sized_relobj_file
<size
, big_endian
>* relobj
,
909 unsigned int local_sym_index
,
910 const Output_data_plt_powerpc
<size
, big_endian
>** sec
) const
912 const Symbol_value
<size
>* lsym
= relobj
->local_symbol(local_sym_index
);
913 if (lsym
->is_ifunc_symbol())
914 *sec
= this->iplt_section();
916 *sec
= this->lplt_section();
917 return relobj
->local_plt_offset(local_sym_index
);
920 // Get the .glink section.
921 const Output_data_glink
<size
, big_endian
>*
922 glink_section() const
924 gold_assert(this->glink_
!= NULL
);
928 Output_data_glink
<size
, big_endian
>*
931 gold_assert(this->glink_
!= NULL
);
935 bool has_glink() const
936 { return this->glink_
!= NULL
; }
938 // Get the GOT section.
939 const Output_data_got_powerpc
<size
, big_endian
>*
942 gold_assert(this->got_
!= NULL
);
946 // Get the GOT section, creating it if necessary.
947 Output_data_got_powerpc
<size
, big_endian
>*
948 got_section(Symbol_table
*, Layout
*);
951 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
952 const elfcpp::Ehdr
<size
, big_endian
>&);
954 // Return the number of entries in the GOT.
956 got_entry_count() const
958 if (this->got_
== NULL
)
960 return this->got_size() / (size
/ 8);
963 // Return the number of entries in the PLT.
965 plt_entry_count() const;
967 // Return the offset of the first non-reserved PLT entry.
969 first_plt_entry_offset() const
973 if (this->abiversion() >= 2)
978 // Return the size of each PLT entry.
980 plt_entry_size() const
984 if (this->abiversion() >= 2)
989 Output_data_save_res
<size
, big_endian
>*
990 savres_section() const
992 return this->savres_section_
;
995 // Add any special sections for this symbol to the gc work list.
996 // For powerpc64, this adds the code section of a function
999 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
1001 // Handle target specific gc actions when adding a gc reference from
1002 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
1003 // and DST_OFF. For powerpc64, this adds a referenc to the code
1004 // section of a function descriptor.
1006 do_gc_add_reference(Symbol_table
* symtab
,
1008 unsigned int src_shndx
,
1010 unsigned int dst_shndx
,
1011 Address dst_off
) const;
1013 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
1016 { return this->stub_tables_
; }
1018 const Output_data_brlt_powerpc
<size
, big_endian
>*
1019 brlt_section() const
1020 { return this->brlt_section_
; }
1023 add_branch_lookup_table(Address to
)
1025 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
1026 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
1030 find_branch_lookup_table(Address to
)
1032 typename
Branch_lookup_table::const_iterator p
1033 = this->branch_lookup_table_
.find(to
);
1034 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
1038 write_branch_lookup_table(unsigned char *oview
)
1040 for (typename
Branch_lookup_table::const_iterator p
1041 = this->branch_lookup_table_
.begin();
1042 p
!= this->branch_lookup_table_
.end();
1045 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
1049 // Wrapper used after relax to define a local symbol in output data,
1050 // from the end if value < 0.
1052 define_local(Symbol_table
* symtab
, const char* name
,
1053 Output_data
* od
, Address value
, unsigned int symsize
)
1056 = symtab
->define_in_output_data(name
, NULL
, Symbol_table::PREDEFINED
,
1057 od
, value
, symsize
, elfcpp::STT_NOTYPE
,
1058 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
, 0,
1059 static_cast<Signed_address
>(value
) < 0,
1061 // We are creating this symbol late, so need to fix up things
1062 // done early in Layout::finalize.
1063 sym
->set_dynsym_index(-1U);
1067 plt_thread_safe() const
1068 { return this->plt_thread_safe_
; }
1071 plt_localentry0() const
1072 { return this->plt_localentry0_
; }
1075 set_has_localentry0()
1077 this->has_localentry0_
= true;
1081 is_elfv2_localentry0(const Symbol
* gsym
) const
1084 && this->abiversion() >= 2
1085 && this->plt_localentry0()
1086 && gsym
->type() == elfcpp::STT_FUNC
1087 && gsym
->is_defined()
1088 && gsym
->nonvis() >> 3 == 0
1089 && !gsym
->non_zero_localentry());
1093 is_elfv2_localentry0(const Sized_relobj_file
<size
, big_endian
>* object
,
1094 unsigned int r_sym
) const
1096 const Powerpc_relobj
<size
, big_endian
>* ppc_object
1097 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
1100 && this->abiversion() >= 2
1101 && this->plt_localentry0()
1102 && ppc_object
->st_other(r_sym
) >> 5 == 0)
1104 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
1106 if (!psymval
->is_ifunc_symbol()
1107 && psymval
->input_shndx(&is_ordinary
) != elfcpp::SHN_UNDEF
1114 // Remember any symbols seen with non-zero localentry, even those
1115 // not providing a definition
1117 resolve(Symbol
* to
, const elfcpp::Sym
<size
, big_endian
>& sym
, Object
*,
1122 unsigned char st_other
= sym
.get_st_other();
1123 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1124 to
->set_non_zero_localentry();
1126 // We haven't resolved anything, continue normal processing.
1132 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
1135 set_abiversion(int ver
)
1137 elfcpp::Elf_Word flags
= this->processor_specific_flags();
1138 flags
&= ~elfcpp::EF_PPC64_ABI
;
1139 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
1140 this->set_processor_specific_flags(flags
);
1144 tls_get_addr_opt() const
1145 { return this->tls_get_addr_opt_
; }
1148 tls_get_addr() const
1149 { return this->tls_get_addr_
; }
1151 // If optimizing __tls_get_addr calls, whether this is the
1152 // "__tls_get_addr" symbol.
1154 is_tls_get_addr_opt(const Symbol
* gsym
) const
1156 return this->tls_get_addr_opt_
&& (gsym
== this->tls_get_addr_
1157 || gsym
== this->tls_get_addr_opt_
);
1161 replace_tls_get_addr(const Symbol
* gsym
) const
1162 { return this->tls_get_addr_opt_
&& gsym
== this->tls_get_addr_
; }
1165 set_has_tls_get_addr_opt()
1166 { this->has_tls_get_addr_opt_
= true; }
1168 // Offset to toc save stack slot
1171 { return this->abiversion() < 2 ? 40 : 24; }
1173 // Offset to linker save stack slot. ELFv2 doesn't have a linker word,
1174 // so use the CR save slot. Used only by __tls_get_addr call stub,
1175 // relying on __tls_get_addr not saving CR itself.
1178 { return this->abiversion() < 2 ? 32 : 8; }
1180 // Merge object attributes from input object with those in the output.
1182 merge_object_attributes(const char*, const Attributes_section_data
*);
1198 : tls_get_addr_state_(NOT_EXPECTED
),
1199 relinfo_(NULL
), relnum_(0), r_offset_(0)
1204 if (this->tls_get_addr_state_
!= NOT_EXPECTED
)
1211 if (this->relinfo_
!= NULL
)
1212 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
1213 _("missing expected __tls_get_addr call"));
1217 expect_tls_get_addr_call(
1218 const Relocate_info
<size
, big_endian
>* relinfo
,
1222 this->tls_get_addr_state_
= EXPECTED
;
1223 this->relinfo_
= relinfo
;
1224 this->relnum_
= relnum
;
1225 this->r_offset_
= r_offset
;
1229 expect_tls_get_addr_call()
1230 { this->tls_get_addr_state_
= EXPECTED
; }
1233 skip_next_tls_get_addr_call()
1234 {this->tls_get_addr_state_
= SKIP
; }
1237 maybe_skip_tls_get_addr_call(Target_powerpc
<size
, big_endian
>* target
,
1238 unsigned int r_type
, const Symbol
* gsym
)
1240 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
1241 || r_type
== elfcpp::R_PPC_PLTREL24
1242 || is_plt16_reloc
<size
>(r_type
)
1243 || r_type
== elfcpp::R_POWERPC_PLTSEQ
1244 || r_type
== elfcpp::R_POWERPC_PLTCALL
)
1246 && (gsym
== target
->tls_get_addr()
1247 || gsym
== target
->tls_get_addr_opt()));
1248 Tls_get_addr last_tls
= this->tls_get_addr_state_
;
1249 this->tls_get_addr_state_
= NOT_EXPECTED
;
1250 if (is_tls_call
&& last_tls
!= EXPECTED
)
1252 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
1261 // What we're up to regarding calls to __tls_get_addr.
1262 // On powerpc, the branch and link insn making a call to
1263 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1264 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1265 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1266 // The marker relocation always comes first, and has the same
1267 // symbol as the reloc on the insn setting up the __tls_get_addr
1268 // argument. This ties the arg setup insn with the call insn,
1269 // allowing ld to safely optimize away the call. We check that
1270 // every call to __tls_get_addr has a marker relocation, and that
1271 // every marker relocation is on a call to __tls_get_addr.
1272 Tls_get_addr tls_get_addr_state_
;
1273 // Info about the last reloc for error message.
1274 const Relocate_info
<size
, big_endian
>* relinfo_
;
1279 // The class which scans relocations.
1280 class Scan
: protected Track_tls
1283 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1286 : Track_tls(), issued_non_pic_error_(false)
1290 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
1293 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1294 Sized_relobj_file
<size
, big_endian
>* object
,
1295 unsigned int data_shndx
,
1296 Output_section
* output_section
,
1297 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1298 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1302 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1303 Sized_relobj_file
<size
, big_endian
>* object
,
1304 unsigned int data_shndx
,
1305 Output_section
* output_section
,
1306 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1310 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1312 Sized_relobj_file
<size
, big_endian
>* relobj
,
1315 const elfcpp::Rela
<size
, big_endian
>& ,
1316 unsigned int r_type
,
1317 const elfcpp::Sym
<size
, big_endian
>&)
1319 // PowerPC64 .opd is not folded, so any identical function text
1320 // may be folded and we'll still keep function addresses distinct.
1321 // That means no reloc is of concern here.
1324 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1325 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1326 if (ppcobj
->abiversion() == 1)
1329 // For 32-bit and ELFv2, conservatively assume anything but calls to
1330 // function code might be taking the address of the function.
1331 return !is_branch_reloc(r_type
);
1335 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1337 Sized_relobj_file
<size
, big_endian
>* relobj
,
1340 const elfcpp::Rela
<size
, big_endian
>& ,
1341 unsigned int r_type
,
1347 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1348 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1349 if (ppcobj
->abiversion() == 1)
1352 return !is_branch_reloc(r_type
);
1356 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1357 Sized_relobj_file
<size
, big_endian
>* object
,
1358 unsigned int r_type
, bool report_err
);
1362 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1363 unsigned int r_type
);
1366 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1367 unsigned int r_type
, Symbol
*);
1370 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1371 Target_powerpc
* target
);
1374 check_non_pic(Relobj
*, unsigned int r_type
);
1376 // Whether we have issued an error about a non-PIC compilation.
1377 bool issued_non_pic_error_
;
1381 symval_for_branch(const Symbol_table
* symtab
,
1382 const Sized_symbol
<size
>* gsym
,
1383 Powerpc_relobj
<size
, big_endian
>* object
,
1384 Address
*value
, unsigned int *dest_shndx
);
1386 // The class which implements relocation.
1387 class Relocate
: protected Track_tls
1390 // Use 'at' branch hints when true, 'y' when false.
1391 // FIXME maybe: set this with an option.
1392 static const bool is_isa_v2
= true;
1398 // Do a relocation. Return false if the caller should not issue
1399 // any warnings about this relocation.
1401 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1402 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1403 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1404 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1408 class Relocate_comdat_behavior
1411 // Decide what the linker should do for relocations that refer to
1412 // discarded comdat sections.
1413 inline Comdat_behavior
1414 get(const char* name
)
1416 gold::Default_comdat_behavior default_behavior
;
1417 Comdat_behavior ret
= default_behavior
.get(name
);
1418 if (ret
== CB_ERROR
)
1421 && (strcmp(name
, ".fixup") == 0
1422 || strcmp(name
, ".got2") == 0))
1425 && (strcmp(name
, ".opd") == 0
1426 || strcmp(name
, ".toc") == 0
1427 || strcmp(name
, ".toc1") == 0))
1434 // Optimize the TLS relocation type based on what we know about the
1435 // symbol. IS_FINAL is true if the final address of this symbol is
1436 // known at link time.
1438 tls::Tls_optimization
1439 optimize_tls_gd(bool is_final
)
1441 // If we are generating a shared library, then we can't do anything
1443 if (parameters
->options().shared()
1444 || !parameters
->options().tls_optimize())
1445 return tls::TLSOPT_NONE
;
1448 return tls::TLSOPT_TO_IE
;
1449 return tls::TLSOPT_TO_LE
;
1452 tls::Tls_optimization
1455 if (parameters
->options().shared()
1456 || !parameters
->options().tls_optimize())
1457 return tls::TLSOPT_NONE
;
1459 return tls::TLSOPT_TO_LE
;
1462 tls::Tls_optimization
1463 optimize_tls_ie(bool is_final
)
1466 || parameters
->options().shared()
1467 || !parameters
->options().tls_optimize())
1468 return tls::TLSOPT_NONE
;
1470 return tls::TLSOPT_TO_LE
;
1475 make_glink_section(Layout
*);
1477 // Create the PLT section.
1479 make_plt_section(Symbol_table
*, Layout
*);
1482 make_iplt_section(Symbol_table
*, Layout
*);
1485 make_lplt_section(Layout
*);
1488 make_brlt_section(Layout
*);
1490 // Create a PLT entry for a global symbol.
1492 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1494 // Create a PLT entry for a local IFUNC symbol.
1496 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1497 Sized_relobj_file
<size
, big_endian
>*,
1500 // Create a PLT entry for a local non-IFUNC symbol.
1502 make_local_plt_entry(Layout
*,
1503 Sized_relobj_file
<size
, big_endian
>*,
1507 // Create a GOT entry for local dynamic __tls_get_addr.
1509 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1510 Sized_relobj_file
<size
, big_endian
>* object
);
1513 tlsld_got_offset() const
1515 return this->tlsld_got_offset_
;
1518 // Get the dynamic reloc section, creating it if necessary.
1520 rela_dyn_section(Layout
*);
1522 // Similarly, but for ifunc symbols get the one for ifunc.
1524 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1526 // Copy a relocation against a global symbol.
1528 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1529 Sized_relobj_file
<size
, big_endian
>* object
,
1530 unsigned int shndx
, Output_section
* output_section
,
1531 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1533 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1534 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1535 symtab
->get_sized_symbol
<size
>(sym
),
1536 object
, shndx
, output_section
,
1537 r_type
, reloc
.get_r_offset(),
1538 reloc
.get_r_addend(),
1539 this->rela_dyn_section(layout
));
1542 // Look over all the input sections, deciding where to place stubs.
1544 group_sections(Layout
*, const Task
*, bool);
1546 // Sort output sections by address.
1547 struct Sort_sections
1550 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1551 { return sec1
->address() < sec2
->address(); }
1557 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1558 unsigned int data_shndx
,
1560 unsigned int r_type
,
1563 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1564 r_type_(r_type
), tocsave_ (0), r_sym_(r_sym
), addend_(addend
)
1570 // Return whether this branch is going via a plt call stub, and if
1571 // so, mark it as having an R_PPC64_TOCSAVE.
1573 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1574 unsigned int shndx
, Address offset
,
1575 Target_powerpc
* target
, Symbol_table
* symtab
);
1577 // If this branch needs a plt call stub, or a long branch stub, make one.
1579 make_stub(Stub_table
<size
, big_endian
>*,
1580 Stub_table
<size
, big_endian
>*,
1581 Symbol_table
*) const;
1584 // The branch location..
1585 Powerpc_relobj
<size
, big_endian
>* object_
;
1586 unsigned int shndx_
;
1588 // ..and the branch type and destination.
1589 unsigned int r_type_
: 31;
1590 unsigned int tocsave_
: 1;
1591 unsigned int r_sym_
;
1595 // Information about this specific target which we pass to the
1596 // general Target structure.
1597 static Target::Target_info powerpc_info
;
1599 // The types of GOT entries needed for this platform.
1600 // These values are exposed to the ABI in an incremental link.
1601 // Do not renumber existing values without changing the version
1602 // number of the .gnu_incremental_inputs section.
1606 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1607 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1608 GOT_TYPE_TPREL
// entry for @got@tprel
1612 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1613 // The PLT section. This is a container for a table of addresses,
1614 // and their relocations. Each address in the PLT has a dynamic
1615 // relocation (R_*_JMP_SLOT) and each address will have a
1616 // corresponding entry in .glink for lazy resolution of the PLT.
1617 // ppc32 initialises the PLT to point at the .glink entry, while
1618 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1619 // linker adds a stub that loads the PLT entry into ctr then
1620 // branches to ctr. There may be more than one stub for each PLT
1621 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1622 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1623 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1624 // The IPLT section. Like plt_, this is a container for a table of
1625 // addresses and their relocations, specifically for STT_GNU_IFUNC
1626 // functions that resolve locally (STT_GNU_IFUNC functions that
1627 // don't resolve locally go in PLT). Unlike plt_, these have no
1628 // entry in .glink for lazy resolution, and the relocation section
1629 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1630 // the relocation section may contain relocations against
1631 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1632 // relocation section will appear at the end of other dynamic
1633 // relocations, so that ld.so applies these relocations after other
1634 // dynamic relocations. In a static executable, the relocation
1635 // section is emitted and marked with __rela_iplt_start and
1636 // __rela_iplt_end symbols.
1637 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1638 // A PLT style section for local, non-ifunc symbols
1639 Output_data_plt_powerpc
<size
, big_endian
>* lplt_
;
1640 // Section holding long branch destinations.
1641 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1642 // The .glink section.
1643 Output_data_glink
<size
, big_endian
>* glink_
;
1644 // The dynamic reloc section.
1645 Reloc_section
* rela_dyn_
;
1646 // Relocs saved to avoid a COPY reloc.
1647 Powerpc_copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1648 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1649 unsigned int tlsld_got_offset_
;
1651 Stub_tables stub_tables_
;
1652 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1653 Branch_lookup_table branch_lookup_table_
;
1655 typedef std::vector
<Branch_info
> Branches
;
1656 Branches branch_info_
;
1657 Tocsave_loc tocsave_loc_
;
1659 bool plt_thread_safe_
;
1660 bool plt_localentry0_
;
1661 bool plt_localentry0_init_
;
1662 bool has_localentry0_
;
1663 bool has_tls_get_addr_opt_
;
1666 int relax_fail_count_
;
1667 int32_t stub_group_size_
;
1669 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1671 // The "__tls_get_addr" symbol, if present
1672 Symbol
* tls_get_addr_
;
1673 // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol.
1674 Symbol
* tls_get_addr_opt_
;
1676 // Attributes in output.
1677 Attributes_section_data
* attributes_section_data_
;
1679 // Last input file to change various attribute tags
1680 const char* last_fp_
;
1681 const char* last_ld_
;
1682 const char* last_vec_
;
1683 const char* last_struct_
;
1687 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1690 true, // is_big_endian
1691 elfcpp::EM_PPC
, // machine_code
1692 false, // has_make_symbol
1693 false, // has_resolve
1694 false, // has_code_fill
1695 true, // is_default_stack_executable
1696 false, // can_icf_inline_merge_sections
1698 "/usr/lib/ld.so.1", // dynamic_linker
1699 0x10000000, // default_text_segment_address
1700 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1701 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1702 false, // isolate_execinstr
1704 elfcpp::SHN_UNDEF
, // small_common_shndx
1705 elfcpp::SHN_UNDEF
, // large_common_shndx
1706 0, // small_common_section_flags
1707 0, // large_common_section_flags
1708 NULL
, // attributes_section
1709 NULL
, // attributes_vendor
1710 "_start", // entry_symbol_name
1711 32, // hash_entry_size
1712 elfcpp::SHT_PROGBITS
, // unwind_section_type
1716 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1719 false, // is_big_endian
1720 elfcpp::EM_PPC
, // machine_code
1721 false, // has_make_symbol
1722 false, // has_resolve
1723 false, // has_code_fill
1724 true, // is_default_stack_executable
1725 false, // can_icf_inline_merge_sections
1727 "/usr/lib/ld.so.1", // dynamic_linker
1728 0x10000000, // default_text_segment_address
1729 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1730 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1731 false, // isolate_execinstr
1733 elfcpp::SHN_UNDEF
, // small_common_shndx
1734 elfcpp::SHN_UNDEF
, // large_common_shndx
1735 0, // small_common_section_flags
1736 0, // large_common_section_flags
1737 NULL
, // attributes_section
1738 NULL
, // attributes_vendor
1739 "_start", // entry_symbol_name
1740 32, // hash_entry_size
1741 elfcpp::SHT_PROGBITS
, // unwind_section_type
1745 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1748 true, // is_big_endian
1749 elfcpp::EM_PPC64
, // machine_code
1750 false, // has_make_symbol
1751 true, // has_resolve
1752 false, // has_code_fill
1753 false, // is_default_stack_executable
1754 false, // can_icf_inline_merge_sections
1756 "/usr/lib/ld.so.1", // dynamic_linker
1757 0x10000000, // default_text_segment_address
1758 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1759 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1760 false, // isolate_execinstr
1762 elfcpp::SHN_UNDEF
, // small_common_shndx
1763 elfcpp::SHN_UNDEF
, // large_common_shndx
1764 0, // small_common_section_flags
1765 0, // large_common_section_flags
1766 NULL
, // attributes_section
1767 NULL
, // attributes_vendor
1768 "_start", // entry_symbol_name
1769 32, // hash_entry_size
1770 elfcpp::SHT_PROGBITS
, // unwind_section_type
1774 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1777 false, // is_big_endian
1778 elfcpp::EM_PPC64
, // machine_code
1779 false, // has_make_symbol
1780 true, // has_resolve
1781 false, // has_code_fill
1782 false, // is_default_stack_executable
1783 false, // can_icf_inline_merge_sections
1785 "/usr/lib/ld.so.1", // dynamic_linker
1786 0x10000000, // default_text_segment_address
1787 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1788 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1789 false, // isolate_execinstr
1791 elfcpp::SHN_UNDEF
, // small_common_shndx
1792 elfcpp::SHN_UNDEF
, // large_common_shndx
1793 0, // small_common_section_flags
1794 0, // large_common_section_flags
1795 NULL
, // attributes_section
1796 NULL
, // attributes_vendor
1797 "_start", // entry_symbol_name
1798 32, // hash_entry_size
1799 elfcpp::SHT_PROGBITS
, // unwind_section_type
1803 is_branch_reloc(unsigned int r_type
)
1805 return (r_type
== elfcpp::R_POWERPC_REL24
1806 || r_type
== elfcpp::R_PPC_PLTREL24
1807 || r_type
== elfcpp::R_PPC_LOCAL24PC
1808 || r_type
== elfcpp::R_POWERPC_REL14
1809 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1810 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1811 || r_type
== elfcpp::R_POWERPC_ADDR24
1812 || r_type
== elfcpp::R_POWERPC_ADDR14
1813 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1814 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1817 // Reloc resolves to plt entry.
1820 is_plt16_reloc(unsigned int r_type
)
1822 return (r_type
== elfcpp::R_POWERPC_PLT16_LO
1823 || r_type
== elfcpp::R_POWERPC_PLT16_HI
1824 || r_type
== elfcpp::R_POWERPC_PLT16_HA
1825 || (size
== 64 && r_type
== elfcpp::R_PPC64_PLT16_LO_DS
));
1828 // If INSN is an opcode that may be used with an @tls operand, return
1829 // the transformed insn for TLS optimisation, otherwise return 0. If
1830 // REG is non-zero only match an insn with RB or RA equal to REG.
1832 at_tls_transform(uint32_t insn
, unsigned int reg
)
1834 if ((insn
& (0x3f << 26)) != 31 << 26)
1838 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1839 rtra
= insn
& ((1 << 26) - (1 << 16));
1840 else if (((insn
>> 16) & 0x1f) == reg
)
1841 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1845 if ((insn
& (0x3ff << 1)) == 266 << 1)
1848 else if ((insn
& (0x1f << 1)) == 23 << 1
1849 && ((insn
& (0x1f << 6)) < 14 << 6
1850 || ((insn
& (0x1f << 6)) >= 16 << 6
1851 && (insn
& (0x1f << 6)) < 24 << 6)))
1852 // load and store indexed -> dform
1853 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1854 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1855 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1856 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1857 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1859 insn
= (58 << 26) | 2;
1867 template<int size
, bool big_endian
>
1868 class Powerpc_relocate_functions
1888 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1889 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1890 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1892 template<int valsize
>
1894 has_overflow_signed(Address value
)
1896 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1897 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1898 limit
<<= ((valsize
- 1) >> 1);
1899 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1900 return value
+ limit
> (limit
<< 1) - 1;
1903 template<int valsize
>
1905 has_overflow_unsigned(Address value
)
1907 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1908 limit
<<= ((valsize
- 1) >> 1);
1909 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1910 return value
> (limit
<< 1) - 1;
1913 template<int valsize
>
1915 has_overflow_bitfield(Address value
)
1917 return (has_overflow_unsigned
<valsize
>(value
)
1918 && has_overflow_signed
<valsize
>(value
));
1921 template<int valsize
>
1922 static inline Status
1923 overflowed(Address value
, Overflow_check overflow
)
1925 if (overflow
== CHECK_SIGNED
)
1927 if (has_overflow_signed
<valsize
>(value
))
1928 return STATUS_OVERFLOW
;
1930 else if (overflow
== CHECK_UNSIGNED
)
1932 if (has_overflow_unsigned
<valsize
>(value
))
1933 return STATUS_OVERFLOW
;
1935 else if (overflow
== CHECK_BITFIELD
)
1937 if (has_overflow_bitfield
<valsize
>(value
))
1938 return STATUS_OVERFLOW
;
1943 // Do a simple RELA relocation
1944 template<int fieldsize
, int valsize
>
1945 static inline Status
1946 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1948 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1949 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1950 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1951 return overflowed
<valsize
>(value
, overflow
);
1954 template<int fieldsize
, int valsize
>
1955 static inline Status
1956 rela(unsigned char* view
,
1957 unsigned int right_shift
,
1958 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1960 Overflow_check overflow
)
1962 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1963 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1964 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1965 Valtype reloc
= value
>> right_shift
;
1968 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1969 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1972 // Do a simple RELA relocation, unaligned.
1973 template<int fieldsize
, int valsize
>
1974 static inline Status
1975 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1977 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1978 return overflowed
<valsize
>(value
, overflow
);
1981 template<int fieldsize
, int valsize
>
1982 static inline Status
1983 rela_ua(unsigned char* view
,
1984 unsigned int right_shift
,
1985 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1987 Overflow_check overflow
)
1989 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1991 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1992 Valtype reloc
= value
>> right_shift
;
1995 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1996 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
2000 // R_PPC64_ADDR64: (Symbol + Addend)
2002 addr64(unsigned char* view
, Address value
)
2003 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
2005 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
2007 addr64_u(unsigned char* view
, Address value
)
2008 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
2010 // R_POWERPC_ADDR32: (Symbol + Addend)
2011 static inline Status
2012 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
2013 { return This::template rela
<32,32>(view
, value
, overflow
); }
2015 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
2016 static inline Status
2017 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
2018 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
2020 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
2021 static inline Status
2022 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
2024 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
2026 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
2027 stat
= STATUS_OVERFLOW
;
2031 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
2032 static inline Status
2033 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
2034 { return This::template rela
<16,16>(view
, value
, overflow
); }
2036 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
2037 static inline Status
2038 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
2039 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
2041 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
2042 static inline Status
2043 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
2045 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
2046 if ((value
& 3) != 0)
2047 stat
= STATUS_OVERFLOW
;
2051 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
2052 static inline Status
2053 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
2055 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
2056 if ((value
& 15) != 0)
2057 stat
= STATUS_OVERFLOW
;
2061 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
2063 addr16_hi(unsigned char* view
, Address value
)
2064 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
2066 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
2068 addr16_ha(unsigned char* view
, Address value
)
2069 { This::addr16_hi(view
, value
+ 0x8000); }
2071 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
2073 addr16_hi2(unsigned char* view
, Address value
)
2074 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
2076 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
2078 addr16_ha2(unsigned char* view
, Address value
)
2079 { This::addr16_hi2(view
, value
+ 0x8000); }
2081 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
2083 addr16_hi3(unsigned char* view
, Address value
)
2084 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
2086 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
2088 addr16_ha3(unsigned char* view
, Address value
)
2089 { This::addr16_hi3(view
, value
+ 0x8000); }
2091 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
2092 static inline Status
2093 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
2095 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
2096 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
2097 stat
= STATUS_OVERFLOW
;
2101 // R_POWERPC_REL16DX_HA
2102 static inline Status
2103 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
2105 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
2106 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
2107 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
2109 value
= static_cast<SignedAddress
>(value
) >> 16;
2110 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
2111 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
2112 return overflowed
<16>(value
, overflow
);
2116 // Set ABI version for input and output.
2118 template<int size
, bool big_endian
>
2120 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
2122 this->e_flags_
|= ver
;
2123 if (this->abiversion() != 0)
2125 Target_powerpc
<size
, big_endian
>* target
=
2126 static_cast<Target_powerpc
<size
, big_endian
>*>(
2127 parameters
->sized_target
<size
, big_endian
>());
2128 if (target
->abiversion() == 0)
2129 target
->set_abiversion(this->abiversion());
2130 else if (target
->abiversion() != this->abiversion())
2131 gold_error(_("%s: ABI version %d is not compatible "
2132 "with ABI version %d output"),
2133 this->name().c_str(),
2134 this->abiversion(), target
->abiversion());
2139 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
2140 // relocatable object, if such sections exists.
2142 template<int size
, bool big_endian
>
2144 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
2145 Read_symbols_data
* sd
)
2147 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2148 const unsigned char* namesu
= sd
->section_names
->data();
2149 const char* names
= reinterpret_cast<const char*>(namesu
);
2150 section_size_type names_size
= sd
->section_names_size
;
2151 const unsigned char* s
;
2153 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
2154 size
== 32 ? ".got2" : ".opd",
2155 names
, names_size
, NULL
);
2158 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2159 this->special_
= ndx
;
2162 if (this->abiversion() == 0)
2163 this->set_abiversion(1);
2164 else if (this->abiversion() > 1)
2165 gold_error(_("%s: .opd invalid in abiv%d"),
2166 this->name().c_str(), this->abiversion());
2171 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
2172 names
, names_size
, NULL
);
2175 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2176 this->relatoc_
= ndx
;
2177 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2178 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
2181 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
2184 // Examine .rela.opd to build info about function entry points.
2186 template<int size
, bool big_endian
>
2188 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
2190 const unsigned char* prelocs
,
2191 const unsigned char* plocal_syms
)
2195 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
2196 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
2197 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2198 Address expected_off
= 0;
2199 bool regular
= true;
2200 unsigned int opd_ent_size
= 0;
2202 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2204 Reltype
reloc(prelocs
);
2205 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
2206 = reloc
.get_r_info();
2207 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2208 if (r_type
== elfcpp::R_PPC64_ADDR64
)
2210 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2211 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
2214 if (r_sym
< this->local_symbol_count())
2216 typename
elfcpp::Sym
<size
, big_endian
>
2217 lsym(plocal_syms
+ r_sym
* sym_size
);
2218 shndx
= lsym
.get_st_shndx();
2219 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2220 value
= lsym
.get_st_value();
2223 shndx
= this->symbol_section_and_value(r_sym
, &value
,
2225 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
2226 value
+ reloc
.get_r_addend());
2229 expected_off
= reloc
.get_r_offset();
2230 opd_ent_size
= expected_off
;
2232 else if (expected_off
!= reloc
.get_r_offset())
2234 expected_off
+= opd_ent_size
;
2236 else if (r_type
== elfcpp::R_PPC64_TOC
)
2238 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
2243 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2244 this->name().c_str(), r_type
);
2248 if (reloc_count
<= 2)
2249 opd_ent_size
= this->section_size(this->opd_shndx());
2250 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
2254 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2255 this->name().c_str());
2261 // Returns true if a code sequence loading the TOC entry at VALUE
2262 // relative to the TOC pointer can be converted into code calculating
2263 // a TOC pointer relative offset.
2264 // If so, the TOC pointer relative offset is stored to VALUE.
2266 template<int size
, bool big_endian
>
2268 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
2269 Target_powerpc
<size
, big_endian
>* target
,
2275 // With -mcmodel=medium code it is quite possible to have
2276 // toc-relative relocs referring to objects outside the TOC.
2277 // Don't try to look at a non-existent TOC.
2278 if (this->toc_shndx() == 0)
2281 // Convert VALUE back to an address by adding got_base (see below),
2282 // then to an offset in the TOC by subtracting the TOC output
2283 // section address and the TOC output offset. Since this TOC output
2284 // section and the got output section are one and the same, we can
2285 // omit adding and subtracting the output section address.
2286 Address off
= (*value
+ this->toc_base_offset()
2287 - this->output_section_offset(this->toc_shndx()));
2288 // Is this offset in the TOC? -mcmodel=medium code may be using
2289 // TOC relative access to variables outside the TOC. Those of
2290 // course can't be optimized. We also don't try to optimize code
2291 // that is using a different object's TOC.
2292 if (off
>= this->section_size(this->toc_shndx()))
2295 if (this->no_toc_opt(off
))
2298 section_size_type vlen
;
2299 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2300 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2302 Address got_base
= (target
->got_section()->output_section()->address()
2303 + this->toc_base_offset());
2305 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2312 // Perform the Sized_relobj_file method, then set up opd info from
2315 template<int size
, bool big_endian
>
2317 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2319 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2322 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2323 p
!= rd
->relocs
.end();
2326 if (p
->data_shndx
== this->opd_shndx())
2328 uint64_t opd_size
= this->section_size(this->opd_shndx());
2329 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2332 this->init_opd(opd_size
);
2333 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2334 rd
->local_symbols
->data());
2342 // Read the symbols then set up st_other vector.
2344 template<int size
, bool big_endian
>
2346 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2348 this->base_read_symbols(sd
);
2349 if (this->input_file()->format() != Input_file::FORMAT_ELF
)
2353 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2354 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2355 const unsigned int loccount
= this->do_local_symbol_count();
2358 this->st_other_
.resize(loccount
);
2359 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2360 off_t locsize
= loccount
* sym_size
;
2361 const unsigned int symtab_shndx
= this->symtab_shndx();
2362 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2363 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2364 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2365 locsize
, true, false);
2367 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2369 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2370 unsigned char st_other
= sym
.get_st_other();
2371 this->st_other_
[i
] = st_other
;
2372 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2374 if (this->abiversion() == 0)
2375 this->set_abiversion(2);
2376 else if (this->abiversion() < 2)
2377 gold_error(_("%s: local symbol %d has invalid st_other"
2378 " for ABI version 1"),
2379 this->name().c_str(), i
);
2385 const size_t shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2386 const unsigned char* ps
= sd
->section_headers
->data() + shdr_size
;
2387 bool merge_attributes
= false;
2388 for (unsigned int i
= 1; i
< this->shnum(); ++i
, ps
+= shdr_size
)
2390 elfcpp::Shdr
<size
, big_endian
> shdr(ps
);
2391 switch (shdr
.get_sh_type())
2393 case elfcpp::SHT_GNU_ATTRIBUTES
:
2395 gold_assert(this->attributes_section_data_
== NULL
);
2396 section_offset_type section_offset
= shdr
.get_sh_offset();
2397 section_size_type section_size
=
2398 convert_to_section_size_type(shdr
.get_sh_size());
2399 const unsigned char* view
=
2400 this->get_view(section_offset
, section_size
, true, false);
2401 this->attributes_section_data_
=
2402 new Attributes_section_data(view
, section_size
);
2406 case elfcpp::SHT_SYMTAB
:
2408 // Sometimes an object has no contents except the section
2409 // name string table and an empty symbol table with the
2410 // undefined symbol. We don't want to merge
2411 // processor-specific flags from such an object.
2412 const typename
elfcpp::Elf_types
<size
>::Elf_WXword sym_size
=
2413 elfcpp::Elf_sizes
<size
>::sym_size
;
2414 if (shdr
.get_sh_size() > sym_size
)
2415 merge_attributes
= true;
2419 case elfcpp::SHT_STRTAB
:
2423 merge_attributes
= true;
2428 if (!merge_attributes
)
2430 // Should rarely happen.
2431 delete this->attributes_section_data_
;
2432 this->attributes_section_data_
= NULL
;
2436 template<int size
, bool big_endian
>
2438 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2440 this->e_flags_
|= ver
;
2441 if (this->abiversion() != 0)
2443 Target_powerpc
<size
, big_endian
>* target
=
2444 static_cast<Target_powerpc
<size
, big_endian
>*>(
2445 parameters
->sized_target
<size
, big_endian
>());
2446 if (target
->abiversion() == 0)
2447 target
->set_abiversion(this->abiversion());
2448 else if (target
->abiversion() != this->abiversion())
2449 gold_error(_("%s: ABI version %d is not compatible "
2450 "with ABI version %d output"),
2451 this->name().c_str(),
2452 this->abiversion(), target
->abiversion());
2457 // Call Sized_dynobj::base_read_symbols to read the symbols then
2458 // read .opd from a dynamic object, filling in opd_ent_ vector,
2460 template<int size
, bool big_endian
>
2462 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2464 this->base_read_symbols(sd
);
2465 const size_t shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2466 const unsigned char* ps
=
2467 sd
->section_headers
->data() + shdr_size
* (this->shnum() - 1);
2468 for (unsigned int i
= this->shnum(); i
> 0; --i
, ps
-= shdr_size
)
2470 elfcpp::Shdr
<size
, big_endian
> shdr(ps
);
2471 if (shdr
.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES
)
2473 section_offset_type section_offset
= shdr
.get_sh_offset();
2474 section_size_type section_size
=
2475 convert_to_section_size_type(shdr
.get_sh_size());
2476 const unsigned char* view
=
2477 this->get_view(section_offset
, section_size
, true, false);
2478 this->attributes_section_data_
=
2479 new Attributes_section_data(view
, section_size
);
2485 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2486 const unsigned char* namesu
= sd
->section_names
->data();
2487 const char* names
= reinterpret_cast<const char*>(namesu
);
2488 const unsigned char* s
= NULL
;
2489 const unsigned char* opd
;
2490 section_size_type opd_size
;
2492 // Find and read .opd section.
2495 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2496 sd
->section_names_size
,
2501 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2502 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2503 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2505 if (this->abiversion() == 0)
2506 this->set_abiversion(1);
2507 else if (this->abiversion() > 1)
2508 gold_error(_("%s: .opd invalid in abiv%d"),
2509 this->name().c_str(), this->abiversion());
2511 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2512 this->opd_address_
= shdr
.get_sh_addr();
2513 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2514 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2520 // Build set of executable sections.
2521 // Using a set is probably overkill. There is likely to be only
2522 // a few executable sections, typically .init, .text and .fini,
2523 // and they are generally grouped together.
2524 typedef std::set
<Sec_info
> Exec_sections
;
2525 Exec_sections exec_sections
;
2527 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2529 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2530 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2531 && ((shdr
.get_sh_flags()
2532 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2533 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2534 && shdr
.get_sh_size() != 0)
2536 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2537 shdr
.get_sh_size(), i
));
2540 if (exec_sections
.empty())
2543 // Look over the OPD entries. This is complicated by the fact
2544 // that some binaries will use two-word entries while others
2545 // will use the standard three-word entries. In most cases
2546 // the third word (the environment pointer for languages like
2547 // Pascal) is unused and will be zero. If the third word is
2548 // used it should not be pointing into executable sections,
2550 this->init_opd(opd_size
);
2551 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2553 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2554 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2555 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2557 // Chances are that this is the third word of an OPD entry.
2559 typename
Exec_sections::const_iterator e
2560 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2561 if (e
!= exec_sections
.begin())
2564 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2566 // We have an address in an executable section.
2567 // VAL ought to be the function entry, set it up.
2568 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2569 // Skip second word of OPD entry, the TOC pointer.
2573 // If we didn't match any executable sections, we likely
2574 // have a non-zero third word in the OPD entry.
2579 // Relocate sections.
2581 template<int size
, bool big_endian
>
2583 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2584 const Symbol_table
* symtab
, const Layout
* layout
,
2585 const unsigned char* pshdrs
, Output_file
* of
,
2586 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2588 unsigned int start
= 1;
2590 && this->relatoc_
!= 0
2591 && !parameters
->options().relocatable())
2593 // Relocate .toc first.
2594 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2595 this->relatoc_
, this->relatoc_
);
2596 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2597 1, this->relatoc_
- 1);
2598 start
= this->relatoc_
+ 1;
2600 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2601 start
, this->shnum() - 1);
2603 if (!parameters
->options().output_is_position_independent())
2605 Target_powerpc
<size
, big_endian
>* target
2606 = static_cast<Target_powerpc
<size
, big_endian
>*>(
2607 parameters
->sized_target
<size
, big_endian
>());
2608 if (target
->lplt_section() && target
->lplt_section()->data_size() != 0)
2610 const section_size_type offset
= target
->lplt_section()->offset();
2611 const section_size_type oview_size
2612 = convert_to_section_size_type(target
->lplt_section()->data_size());
2613 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2615 bool modified
= false;
2616 unsigned int nsyms
= this->local_symbol_count();
2617 for (unsigned int i
= 0; i
< nsyms
; i
++)
2618 if (this->local_has_plt_offset(i
))
2620 Address value
= this->local_symbol_value(i
, 0);
2622 value
+= ppc64_local_entry_offset(i
);
2623 size_t off
= this->local_plt_offset(i
);
2624 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ off
, value
);
2628 of
->write_output_view(offset
, oview_size
, oview
);
2633 // Set up some symbols.
2635 template<int size
, bool big_endian
>
2637 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2638 Symbol_table
* symtab
,
2643 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2644 // undefined when scanning relocs (and thus requires
2645 // non-relative dynamic relocs). The proper value will be
2647 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2648 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2650 Target_powerpc
<size
, big_endian
>* target
=
2651 static_cast<Target_powerpc
<size
, big_endian
>*>(
2652 parameters
->sized_target
<size
, big_endian
>());
2653 Output_data_got_powerpc
<size
, big_endian
>* got
2654 = target
->got_section(symtab
, layout
);
2655 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2656 Symbol_table::PREDEFINED
,
2660 elfcpp::STV_HIDDEN
, 0,
2664 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2665 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2666 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2668 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2670 = layout
->add_output_section_data(".sdata", 0,
2672 | elfcpp::SHF_WRITE
,
2673 sdata
, ORDER_SMALL_DATA
, false);
2674 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2675 Symbol_table::PREDEFINED
,
2676 os
, 32768, 0, elfcpp::STT_OBJECT
,
2677 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2683 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2684 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2685 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2687 Target_powerpc
<size
, big_endian
>* target
=
2688 static_cast<Target_powerpc
<size
, big_endian
>*>(
2689 parameters
->sized_target
<size
, big_endian
>());
2690 Output_data_got_powerpc
<size
, big_endian
>* got
2691 = target
->got_section(symtab
, layout
);
2692 symtab
->define_in_output_data(".TOC.", NULL
,
2693 Symbol_table::PREDEFINED
,
2697 elfcpp::STV_HIDDEN
, 0,
2702 this->tls_get_addr_
= symtab
->lookup("__tls_get_addr");
2703 if (parameters
->options().tls_get_addr_optimize()
2704 && this->tls_get_addr_
!= NULL
2705 && this->tls_get_addr_
->in_reg())
2706 this->tls_get_addr_opt_
= symtab
->lookup("__tls_get_addr_opt");
2707 if (this->tls_get_addr_opt_
!= NULL
)
2709 if (this->tls_get_addr_
->is_undefined()
2710 || this->tls_get_addr_
->is_from_dynobj())
2712 // Make it seem as if references to __tls_get_addr are
2713 // really to __tls_get_addr_opt, so the latter symbol is
2714 // made dynamic, not the former.
2715 this->tls_get_addr_
->clear_in_reg();
2716 this->tls_get_addr_opt_
->set_in_reg();
2718 // We have a non-dynamic definition for __tls_get_addr.
2719 // Make __tls_get_addr_opt the same, if it does not already have
2720 // a non-dynamic definition.
2721 else if (this->tls_get_addr_opt_
->is_undefined()
2722 || this->tls_get_addr_opt_
->is_from_dynobj())
2724 Sized_symbol
<size
>* from
2725 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_
);
2726 Sized_symbol
<size
>* to
2727 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_opt_
);
2728 symtab
->clone
<size
>(to
, from
);
2733 // Set up PowerPC target specific relobj.
2735 template<int size
, bool big_endian
>
2737 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2738 const std::string
& name
,
2739 Input_file
* input_file
,
2740 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2742 int et
= ehdr
.get_e_type();
2743 // ET_EXEC files are valid input for --just-symbols/-R,
2744 // and we treat them as relocatable objects.
2745 if (et
== elfcpp::ET_REL
2746 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2748 Powerpc_relobj
<size
, big_endian
>* obj
=
2749 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2753 else if (et
== elfcpp::ET_DYN
)
2755 Powerpc_dynobj
<size
, big_endian
>* obj
=
2756 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2762 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2767 template<int size
, bool big_endian
>
2768 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2771 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2772 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2774 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2775 : Output_data_got
<size
, big_endian
>(),
2776 symtab_(symtab
), layout_(layout
),
2777 header_ent_cnt_(size
== 32 ? 3 : 1),
2778 header_index_(size
== 32 ? 0x2000 : 0)
2781 this->set_addralign(256);
2784 // Override all the Output_data_got methods we use so as to first call
2787 add_global(Symbol
* gsym
, unsigned int got_type
)
2789 this->reserve_ent();
2790 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2794 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2796 this->reserve_ent();
2797 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2801 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2802 { return this->add_global_plt(gsym
, got_type
); }
2805 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2806 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2808 this->reserve_ent();
2809 Output_data_got
<size
, big_endian
>::
2810 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2814 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2815 Output_data_reloc_generic
* rel_dyn
,
2816 unsigned int r_type_1
, unsigned int r_type_2
)
2818 if (gsym
->has_got_offset(got_type
))
2821 this->reserve_ent(2);
2822 Output_data_got
<size
, big_endian
>::
2823 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2827 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2829 this->reserve_ent();
2830 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2835 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2837 this->reserve_ent();
2838 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2843 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2844 { return this->add_local_plt(object
, sym_index
, got_type
); }
2847 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2848 unsigned int got_type
,
2849 Output_data_reloc_generic
* rel_dyn
,
2850 unsigned int r_type
)
2852 if (object
->local_has_got_offset(sym_index
, got_type
))
2855 this->reserve_ent(2);
2856 Output_data_got
<size
, big_endian
>::
2857 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2861 add_constant(Valtype constant
)
2863 this->reserve_ent();
2864 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2868 add_constant_pair(Valtype c1
, Valtype c2
)
2870 this->reserve_ent(2);
2871 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2874 // Offset of _GLOBAL_OFFSET_TABLE_.
2878 return this->got_offset(this->header_index_
);
2881 // Offset of base used to access the GOT/TOC.
2882 // The got/toc pointer reg will be set to this value.
2884 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2887 return this->g_o_t();
2889 return (this->output_section()->address()
2890 + object
->toc_base_offset()
2894 // Ensure our GOT has a header.
2896 set_final_data_size()
2898 if (this->header_ent_cnt_
!= 0)
2899 this->make_header();
2900 Output_data_got
<size
, big_endian
>::set_final_data_size();
2903 // First word of GOT header needs some values that are not
2904 // handled by Output_data_got so poke them in here.
2905 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2907 do_write(Output_file
* of
)
2910 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2911 val
= this->layout_
->dynamic_section()->address();
2913 val
= this->output_section()->address() + 0x8000;
2914 this->replace_constant(this->header_index_
, val
);
2915 Output_data_got
<size
, big_endian
>::do_write(of
);
2920 reserve_ent(unsigned int cnt
= 1)
2922 if (this->header_ent_cnt_
== 0)
2924 if (this->num_entries() + cnt
> this->header_index_
)
2925 this->make_header();
2931 this->header_ent_cnt_
= 0;
2932 this->header_index_
= this->num_entries();
2935 Output_data_got
<size
, big_endian
>::add_constant(0);
2936 Output_data_got
<size
, big_endian
>::add_constant(0);
2937 Output_data_got
<size
, big_endian
>::add_constant(0);
2939 // Define _GLOBAL_OFFSET_TABLE_ at the header
2940 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2943 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2944 sym
->set_value(this->g_o_t());
2947 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2948 Symbol_table::PREDEFINED
,
2949 this, this->g_o_t(), 0,
2952 elfcpp::STV_HIDDEN
, 0,
2956 Output_data_got
<size
, big_endian
>::add_constant(0);
2959 // Stashed pointers.
2960 Symbol_table
* symtab_
;
2964 unsigned int header_ent_cnt_
;
2965 // GOT header index.
2966 unsigned int header_index_
;
2969 // Get the GOT section, creating it if necessary.
2971 template<int size
, bool big_endian
>
2972 Output_data_got_powerpc
<size
, big_endian
>*
2973 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2976 if (this->got_
== NULL
)
2978 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2981 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2983 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2984 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2985 this->got_
, ORDER_DATA
, false);
2991 // Get the dynamic reloc section, creating it if necessary.
2993 template<int size
, bool big_endian
>
2994 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2995 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2997 if (this->rela_dyn_
== NULL
)
2999 gold_assert(layout
!= NULL
);
3000 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
3001 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
3002 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
3003 ORDER_DYNAMIC_RELOCS
, false);
3005 return this->rela_dyn_
;
3008 // Similarly, but for ifunc symbols get the one for ifunc.
3010 template<int size
, bool big_endian
>
3011 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
3012 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
3017 return this->rela_dyn_section(layout
);
3019 if (this->iplt_
== NULL
)
3020 this->make_iplt_section(symtab
, layout
);
3021 return this->iplt_
->rel_plt();
3027 // Determine the stub group size. The group size is the absolute
3028 // value of the parameter --stub-group-size. If --stub-group-size
3029 // is passed a negative value, we restrict stubs to be always after
3030 // the stubbed branches.
3031 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
3032 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
3033 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
3034 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
3035 owner_(NULL
), output_section_(NULL
)
3039 // Return true iff input section can be handled by current stub
3042 can_add_to_stub_group(Output_section
* o
,
3043 const Output_section::Input_section
* i
,
3046 const Output_section::Input_section
*
3052 { return output_section_
; }
3055 set_output_and_owner(Output_section
* o
,
3056 const Output_section::Input_section
* i
)
3058 this->output_section_
= o
;
3067 // Adding group sections before the stubs.
3068 FINDING_STUB_SECTION
,
3069 // Adding group sections after the stubs.
3073 uint32_t stub_group_size_
;
3074 bool stubs_always_after_branch_
;
3075 bool suppress_size_errors_
;
3076 // True if a stub group can serve multiple output sections.
3079 // Current max size of group. Starts at stub_group_size_ but is
3080 // reduced to stub_group_size_/1024 on seeing a section with
3081 // external conditional branches.
3082 uint32_t group_size_
;
3083 uint64_t group_start_addr_
;
3084 // owner_ and output_section_ specify the section to which stubs are
3085 // attached. The stubs are placed at the end of this section.
3086 const Output_section::Input_section
* owner_
;
3087 Output_section
* output_section_
;
3090 // Return true iff input section can be handled by current stub
3091 // group. Sections are presented to this function in order,
3092 // so the first section is the head of the group.
3095 Stub_control::can_add_to_stub_group(Output_section
* o
,
3096 const Output_section::Input_section
* i
,
3099 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
3101 uint64_t start_addr
= o
->address();
3104 // .init and .fini sections are pasted together to form a single
3105 // function. We can't be adding stubs in the middle of the function.
3106 this_size
= o
->data_size();
3109 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
3110 this_size
= i
->data_size();
3113 uint64_t end_addr
= start_addr
+ this_size
;
3114 uint32_t group_size
= this->stub_group_size_
;
3116 this->group_size_
= group_size
= group_size
>> 10;
3118 if (this_size
> group_size
&& !this->suppress_size_errors_
)
3119 gold_warning(_("%s:%s exceeds group size"),
3120 i
->relobj()->name().c_str(),
3121 i
->relobj()->section_name(i
->shndx()).c_str());
3123 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
3124 has14
? " 14bit" : "",
3125 i
->relobj()->name().c_str(),
3126 i
->relobj()->section_name(i
->shndx()).c_str(),
3127 (long long) this_size
,
3128 (this->state_
== NO_GROUP
3130 : (long long) end_addr
- this->group_start_addr_
));
3132 if (this->state_
== NO_GROUP
)
3134 // Only here on very first use of Stub_control
3136 this->output_section_
= o
;
3137 this->state_
= FINDING_STUB_SECTION
;
3138 this->group_size_
= group_size
;
3139 this->group_start_addr_
= start_addr
;
3142 else if (!this->multi_os_
&& this->output_section_
!= o
)
3144 else if (this->state_
== HAS_STUB_SECTION
)
3146 // Can we add this section, which is after the stubs, to the
3148 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
3151 else if (this->state_
== FINDING_STUB_SECTION
)
3153 if ((whole_sec
&& this->output_section_
== o
)
3154 || end_addr
- this->group_start_addr_
<= this->group_size_
)
3156 // Stubs are added at the end of "owner_".
3158 this->output_section_
= o
;
3161 // The group before the stubs has reached maximum size.
3162 // Now see about adding sections after the stubs to the
3163 // group. If the current section has a 14-bit branch and
3164 // the group before the stubs exceeds group_size_ (because
3165 // they didn't have 14-bit branches), don't add sections
3166 // after the stubs: The size of stubs for such a large
3167 // group may exceed the reach of a 14-bit branch.
3168 if (!this->stubs_always_after_branch_
3169 && this_size
<= this->group_size_
3170 && start_addr
- this->group_start_addr_
<= this->group_size_
)
3172 gold_debug(DEBUG_TARGET
, "adding after stubs");
3173 this->state_
= HAS_STUB_SECTION
;
3174 this->group_start_addr_
= start_addr
;
3181 gold_debug(DEBUG_TARGET
,
3182 !this->multi_os_
&& this->output_section_
!= o
3183 ? "nope, new output section\n"
3184 : "nope, didn't fit\n");
3186 // The section fails to fit in the current group. Set up a few
3187 // things for the next group. owner_ and output_section_ will be
3188 // set later after we've retrieved those values for the current
3190 this->state_
= FINDING_STUB_SECTION
;
3191 this->group_size_
= group_size
;
3192 this->group_start_addr_
= start_addr
;
3196 // Look over all the input sections, deciding where to place stubs.
3198 template<int size
, bool big_endian
>
3200 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
3202 bool no_size_errors
)
3204 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
3205 parameters
->options().stub_group_multi());
3207 // Group input sections and insert stub table
3208 Stub_table_owner
* table_owner
= NULL
;
3209 std::vector
<Stub_table_owner
*> tables
;
3210 Layout::Section_list section_list
;
3211 layout
->get_executable_sections(§ion_list
);
3212 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
3213 for (Layout::Section_list::iterator o
= section_list
.begin();
3214 o
!= section_list
.end();
3217 typedef Output_section::Input_section_list Input_section_list
;
3218 for (Input_section_list::const_iterator i
3219 = (*o
)->input_sections().begin();
3220 i
!= (*o
)->input_sections().end();
3223 if (i
->is_input_section()
3224 || i
->is_relaxed_input_section())
3226 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3227 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
3228 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
3229 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
3231 table_owner
->output_section
= stub_control
.output_section();
3232 table_owner
->owner
= stub_control
.owner();
3233 stub_control
.set_output_and_owner(*o
, &*i
);
3236 if (table_owner
== NULL
)
3238 table_owner
= new Stub_table_owner
;
3239 tables
.push_back(table_owner
);
3241 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
3245 if (table_owner
!= NULL
)
3247 table_owner
->output_section
= stub_control
.output_section();
3248 table_owner
->owner
= stub_control
.owner();;
3250 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
3254 Stub_table
<size
, big_endian
>* stub_table
;
3256 if ((*t
)->owner
->is_input_section())
3257 stub_table
= new Stub_table
<size
, big_endian
>(this,
3258 (*t
)->output_section
,
3260 this->stub_tables_
.size());
3261 else if ((*t
)->owner
->is_relaxed_input_section())
3262 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
3263 (*t
)->owner
->relaxed_input_section());
3266 this->stub_tables_
.push_back(stub_table
);
3271 static unsigned long
3272 max_branch_delta (unsigned int r_type
)
3274 if (r_type
== elfcpp::R_POWERPC_REL14
3275 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
3276 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
3278 if (r_type
== elfcpp::R_POWERPC_REL24
3279 || r_type
== elfcpp::R_PPC_PLTREL24
3280 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
3285 // Return whether this branch is going via a plt call stub.
3287 template<int size
, bool big_endian
>
3289 Target_powerpc
<size
, big_endian
>::Branch_info::mark_pltcall(
3290 Powerpc_relobj
<size
, big_endian
>* ppc_object
,
3293 Target_powerpc
* target
,
3294 Symbol_table
* symtab
)
3296 if (this->object_
!= ppc_object
3297 || this->shndx_
!= shndx
3298 || this->offset_
!= offset
)
3301 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3302 if (sym
!= NULL
&& sym
->is_forwarder())
3303 sym
= symtab
->resolve_forwards(sym
);
3304 if (target
->replace_tls_get_addr(sym
))
3305 sym
= target
->tls_get_addr_opt();
3306 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3308 ? (gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3309 && !target
->is_elfv2_localentry0(gsym
))
3310 : (this->object_
->local_has_plt_offset(this->r_sym_
)
3311 && !target
->is_elfv2_localentry0(this->object_
, this->r_sym_
)))
3319 // If this branch needs a plt call stub, or a long branch stub, make one.
3321 template<int size
, bool big_endian
>
3323 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
3324 Stub_table
<size
, big_endian
>* stub_table
,
3325 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
3326 Symbol_table
* symtab
) const
3328 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3329 Target_powerpc
<size
, big_endian
>* target
=
3330 static_cast<Target_powerpc
<size
, big_endian
>*>(
3331 parameters
->sized_target
<size
, big_endian
>());
3332 if (sym
!= NULL
&& sym
->is_forwarder())
3333 sym
= symtab
->resolve_forwards(sym
);
3334 if (target
->replace_tls_get_addr(sym
))
3335 sym
= target
->tls_get_addr_opt();
3336 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3340 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3341 : this->object_
->local_has_plt_offset(this->r_sym_
))
3345 && target
->abiversion() >= 2
3346 && !parameters
->options().output_is_position_independent()
3347 && !is_branch_reloc(this->r_type_
))
3348 target
->glink_section()->add_global_entry(gsym
);
3351 if (stub_table
== NULL
3354 && !parameters
->options().output_is_position_independent()
3355 && !is_branch_reloc(this->r_type_
)))
3356 stub_table
= this->object_
->stub_table(this->shndx_
);
3357 if (stub_table
== NULL
)
3359 // This is a ref from a data section to an ifunc symbol,
3360 // or a non-branch reloc for which we always want to use
3361 // one set of stubs for resolving function addresses.
3362 stub_table
= ifunc_stub_table
;
3364 gold_assert(stub_table
!= NULL
);
3365 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3366 if (from
!= invalid_address
)
3367 from
+= (this->object_
->output_section(this->shndx_
)->address()
3370 ok
= stub_table
->add_plt_call_entry(from
,
3371 this->object_
, gsym
,
3372 this->r_type_
, this->addend_
,
3375 ok
= stub_table
->add_plt_call_entry(from
,
3376 this->object_
, this->r_sym_
,
3377 this->r_type_
, this->addend_
,
3383 Address max_branch_offset
= max_branch_delta(this->r_type_
);
3384 if (max_branch_offset
== 0)
3386 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3387 gold_assert(from
!= invalid_address
);
3388 from
+= (this->object_
->output_section(this->shndx_
)->address()
3393 switch (gsym
->source())
3395 case Symbol::FROM_OBJECT
:
3397 Object
* symobj
= gsym
->object();
3398 if (symobj
->is_dynamic()
3399 || symobj
->pluginobj() != NULL
)
3402 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
3403 if (shndx
== elfcpp::SHN_UNDEF
)
3408 case Symbol::IS_UNDEFINED
:
3414 Symbol_table::Compute_final_value_status status
;
3415 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
3416 if (status
!= Symbol_table::CFVS_OK
)
3419 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
3423 const Symbol_value
<size
>* psymval
3424 = this->object_
->local_symbol(this->r_sym_
);
3425 Symbol_value
<size
> symval
;
3426 if (psymval
->is_section_symbol())
3427 symval
.set_is_section_symbol();
3428 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
3429 typename
ObjType::Compute_final_local_value_status status
3430 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
3432 if (status
!= ObjType::CFLV_OK
3433 || !symval
.has_output_value())
3435 to
= symval
.value(this->object_
, 0);
3437 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
3439 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
3440 to
+= this->addend_
;
3441 if (stub_table
== NULL
)
3442 stub_table
= this->object_
->stub_table(this->shndx_
);
3443 if (size
== 64 && target
->abiversion() < 2)
3445 unsigned int dest_shndx
;
3446 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
3450 Address delta
= to
- from
;
3451 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
3453 if (stub_table
== NULL
)
3455 gold_warning(_("%s:%s: branch in non-executable section,"
3456 " no long branch stub for you"),
3457 this->object_
->name().c_str(),
3458 this->object_
->section_name(this->shndx_
).c_str());
3461 bool save_res
= (size
== 64
3463 && gsym
->source() == Symbol::IN_OUTPUT_DATA
3464 && gsym
->output_data() == target
->savres_section());
3465 ok
= stub_table
->add_long_branch_entry(this->object_
,
3467 from
, to
, save_res
);
3471 gold_debug(DEBUG_TARGET
,
3472 "branch at %s:%s+%#lx\n"
3473 "can't reach stub attached to %s:%s",
3474 this->object_
->name().c_str(),
3475 this->object_
->section_name(this->shndx_
).c_str(),
3476 (unsigned long) this->offset_
,
3477 stub_table
->relobj()->name().c_str(),
3478 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3483 // Relaxation hook. This is where we do stub generation.
3485 template<int size
, bool big_endian
>
3487 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3488 const Input_objects
*,
3489 Symbol_table
* symtab
,
3493 unsigned int prev_brlt_size
= 0;
3497 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3499 && this->abiversion() < 2
3501 && !parameters
->options().user_set_plt_thread_safe())
3503 static const char* const thread_starter
[] =
3507 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3509 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3510 "mq_notify", "create_timer",
3515 "GOMP_parallel_start",
3516 "GOMP_parallel_loop_static",
3517 "GOMP_parallel_loop_static_start",
3518 "GOMP_parallel_loop_dynamic",
3519 "GOMP_parallel_loop_dynamic_start",
3520 "GOMP_parallel_loop_guided",
3521 "GOMP_parallel_loop_guided_start",
3522 "GOMP_parallel_loop_runtime",
3523 "GOMP_parallel_loop_runtime_start",
3524 "GOMP_parallel_sections",
3525 "GOMP_parallel_sections_start",
3530 if (parameters
->options().shared())
3534 for (unsigned int i
= 0;
3535 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3538 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3539 thread_safe
= (sym
!= NULL
3541 && sym
->in_real_elf());
3547 this->plt_thread_safe_
= thread_safe
;
3552 this->stub_group_size_
= parameters
->options().stub_group_size();
3553 bool no_size_errors
= true;
3554 if (this->stub_group_size_
== 1)
3555 this->stub_group_size_
= 0x1c00000;
3556 else if (this->stub_group_size_
== -1)
3557 this->stub_group_size_
= -0x1e00000;
3559 no_size_errors
= false;
3560 this->group_sections(layout
, task
, no_size_errors
);
3562 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3564 this->branch_lookup_table_
.clear();
3565 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3566 p
!= this->stub_tables_
.end();
3569 (*p
)->clear_stubs(true);
3571 this->stub_tables_
.clear();
3572 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3573 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3574 program_name
, this->stub_group_size_
);
3575 this->group_sections(layout
, task
, true);
3578 // We need address of stub tables valid for make_stub.
3579 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3580 p
!= this->stub_tables_
.end();
3583 const Powerpc_relobj
<size
, big_endian
>* object
3584 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3585 Address off
= object
->get_output_section_offset((*p
)->shndx());
3586 gold_assert(off
!= invalid_address
);
3587 Output_section
* os
= (*p
)->output_section();
3588 (*p
)->set_address_and_size(os
, off
);
3593 // Clear plt call stubs, long branch stubs and branch lookup table.
3594 prev_brlt_size
= this->branch_lookup_table_
.size();
3595 this->branch_lookup_table_
.clear();
3596 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3597 p
!= this->stub_tables_
.end();
3600 (*p
)->clear_stubs(false);
3604 // Build all the stubs.
3605 this->relax_failed_
= false;
3606 Stub_table
<size
, big_endian
>* ifunc_stub_table
3607 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3608 Stub_table
<size
, big_endian
>* one_stub_table
3609 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3610 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3611 b
!= this->branch_info_
.end();
3614 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3615 && !this->relax_failed_
)
3617 this->relax_failed_
= true;
3618 this->relax_fail_count_
++;
3619 if (this->relax_fail_count_
< 3)
3624 // Did anything change size?
3625 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3626 bool again
= num_huge_branches
!= prev_brlt_size
;
3627 if (size
== 64 && num_huge_branches
!= 0)
3628 this->make_brlt_section(layout
);
3629 if (size
== 64 && again
)
3630 this->brlt_section_
->set_current_size(num_huge_branches
);
3632 for (typename
Stub_tables::reverse_iterator p
= this->stub_tables_
.rbegin();
3633 p
!= this->stub_tables_
.rend();
3635 (*p
)->remove_eh_frame(layout
);
3637 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3638 p
!= this->stub_tables_
.end();
3640 (*p
)->add_eh_frame(layout
);
3642 typedef Unordered_set
<Output_section
*> Output_sections
;
3643 Output_sections os_need_update
;
3644 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3645 p
!= this->stub_tables_
.end();
3648 if ((*p
)->size_update())
3651 os_need_update
.insert((*p
)->output_section());
3655 // Set output section offsets for all input sections in an output
3656 // section that just changed size. Anything past the stubs will
3658 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3659 p
!= os_need_update
.end();
3662 Output_section
* os
= *p
;
3664 typedef Output_section::Input_section_list Input_section_list
;
3665 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3666 i
!= os
->input_sections().end();
3669 off
= align_address(off
, i
->addralign());
3670 if (i
->is_input_section() || i
->is_relaxed_input_section())
3671 i
->relobj()->set_section_offset(i
->shndx(), off
);
3672 if (i
->is_relaxed_input_section())
3674 Stub_table
<size
, big_endian
>* stub_table
3675 = static_cast<Stub_table
<size
, big_endian
>*>(
3676 i
->relaxed_input_section());
3677 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3678 off
+= stub_table_size
;
3679 // After a few iterations, set current stub table size
3680 // as min size threshold, so later stub tables can only
3683 stub_table
->set_min_size_threshold(stub_table_size
);
3686 off
+= i
->data_size();
3688 // If .branch_lt is part of this output section, then we have
3689 // just done the offset adjustment.
3690 os
->clear_section_offsets_need_adjustment();
3695 && num_huge_branches
!= 0
3696 && parameters
->options().output_is_position_independent())
3698 // Fill in the BRLT relocs.
3699 this->brlt_section_
->reset_brlt_sizes();
3700 for (typename
Branch_lookup_table::const_iterator p
3701 = this->branch_lookup_table_
.begin();
3702 p
!= this->branch_lookup_table_
.end();
3705 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3707 this->brlt_section_
->finalize_brlt_sizes();
3711 && (parameters
->options().user_set_emit_stub_syms()
3712 ? parameters
->options().emit_stub_syms()
3714 || parameters
->options().output_is_position_independent()
3715 || parameters
->options().emit_relocs())))
3717 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3718 p
!= this->stub_tables_
.end();
3720 (*p
)->define_stub_syms(symtab
);
3722 if (this->glink_
!= NULL
)
3724 int stub_size
= this->glink_
->pltresolve_size();
3725 Address value
= -stub_size
;
3731 this->define_local(symtab
, "__glink_PLTresolve",
3732 this->glink_
, value
, stub_size
);
3735 this->define_local(symtab
, "__glink", this->glink_
, 0, 0);
3742 template<int size
, bool big_endian
>
3744 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3745 unsigned char* oview
,
3749 uint64_t address
= plt
->address();
3750 off_t len
= plt
->data_size();
3752 if (plt
== this->glink_
)
3754 // See Output_data_glink::do_write() for glink contents.
3757 gold_assert(parameters
->doing_static_link());
3758 // Static linking may need stubs, to support ifunc and long
3759 // branches. We need to create an output section for
3760 // .eh_frame early in the link process, to have a place to
3761 // attach stub .eh_frame info. We also need to have
3762 // registered a CIE that matches the stub CIE. Both of
3763 // these requirements are satisfied by creating an FDE and
3764 // CIE for .glink, even though static linking will leave
3765 // .glink zero length.
3766 // ??? Hopefully generating an FDE with a zero address range
3767 // won't confuse anything that consumes .eh_frame info.
3769 else if (size
== 64)
3771 // There is one word before __glink_PLTresolve
3775 else if (parameters
->options().output_is_position_independent())
3777 // There are two FDEs for a position independent glink.
3778 // The first covers the branch table, the second
3779 // __glink_PLTresolve at the end of glink.
3780 off_t resolve_size
= this->glink_
->pltresolve_size();
3781 if (oview
[9] == elfcpp::DW_CFA_nop
)
3782 len
-= resolve_size
;
3785 address
+= len
- resolve_size
;
3792 // Must be a stub table.
3793 const Stub_table
<size
, big_endian
>* stub_table
3794 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3795 uint64_t stub_address
= stub_table
->stub_address();
3796 len
-= stub_address
- address
;
3797 address
= stub_address
;
3800 *paddress
= address
;
3804 // A class to handle the PLT data.
3806 template<int size
, bool big_endian
>
3807 class Output_data_plt_powerpc
: public Output_section_data_build
3810 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3811 size
, big_endian
> Reloc_section
;
3813 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3814 Reloc_section
* plt_rel
,
3816 : Output_section_data_build(size
== 32 ? 4 : 8),
3822 // Add an entry to the PLT.
3827 add_ifunc_entry(Symbol
*);
3830 add_local_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3833 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3835 // Return the .rela.plt section data.
3842 // Return the number of PLT entries.
3846 if (this->current_data_size() == 0)
3848 return ((this->current_data_size() - this->first_plt_entry_offset())
3849 / this->plt_entry_size());
3854 do_adjust_output_section(Output_section
* os
)
3859 // Write to a map file.
3861 do_print_to_mapfile(Mapfile
* mapfile
) const
3862 { mapfile
->print_output_data(this, this->name_
); }
3865 // Return the offset of the first non-reserved PLT entry.
3867 first_plt_entry_offset() const
3869 // IPLT and LPLT have no reserved entry.
3870 if (this->name_
[3] == 'I' || this->name_
[3] == 'L')
3872 return this->targ_
->first_plt_entry_offset();
3875 // Return the size of each PLT entry.
3877 plt_entry_size() const
3879 return this->targ_
->plt_entry_size();
3882 // Write out the PLT data.
3884 do_write(Output_file
*);
3886 // The reloc section.
3887 Reloc_section
* rel_
;
3888 // Allows access to .glink for do_write.
3889 Target_powerpc
<size
, big_endian
>* targ_
;
3890 // What to report in map file.
3894 // Add an entry to the PLT.
3896 template<int size
, bool big_endian
>
3898 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3900 if (!gsym
->has_plt_offset())
3902 section_size_type off
= this->current_data_size();
3904 off
+= this->first_plt_entry_offset();
3905 gsym
->set_plt_offset(off
);
3906 gsym
->set_needs_dynsym_entry();
3907 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3908 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3909 off
+= this->plt_entry_size();
3910 this->set_current_data_size(off
);
3914 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3916 template<int size
, bool big_endian
>
3918 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3920 if (!gsym
->has_plt_offset())
3922 section_size_type off
= this->current_data_size();
3923 gsym
->set_plt_offset(off
);
3924 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3925 if (size
== 64 && this->targ_
->abiversion() < 2)
3926 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3927 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3928 off
+= this->plt_entry_size();
3929 this->set_current_data_size(off
);
3933 // Add an entry for a local symbol to the PLT.
3935 template<int size
, bool big_endian
>
3937 Output_data_plt_powerpc
<size
, big_endian
>::add_local_entry(
3938 Sized_relobj_file
<size
, big_endian
>* relobj
,
3939 unsigned int local_sym_index
)
3941 if (!relobj
->local_has_plt_offset(local_sym_index
))
3943 section_size_type off
= this->current_data_size();
3944 relobj
->set_local_plt_offset(local_sym_index
, off
);
3947 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3948 if (size
== 64 && this->targ_
->abiversion() < 2)
3949 dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3950 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
,
3951 dynrel
, this, off
, 0);
3953 off
+= this->plt_entry_size();
3954 this->set_current_data_size(off
);
3958 // Add an entry for a local ifunc symbol to the IPLT.
3960 template<int size
, bool big_endian
>
3962 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3963 Sized_relobj_file
<size
, big_endian
>* relobj
,
3964 unsigned int local_sym_index
)
3966 if (!relobj
->local_has_plt_offset(local_sym_index
))
3968 section_size_type off
= this->current_data_size();
3969 relobj
->set_local_plt_offset(local_sym_index
, off
);
3970 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3971 if (size
== 64 && this->targ_
->abiversion() < 2)
3972 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3973 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3975 off
+= this->plt_entry_size();
3976 this->set_current_data_size(off
);
3980 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3981 static const uint32_t add_2_2_11
= 0x7c425a14;
3982 static const uint32_t add_2_2_12
= 0x7c426214;
3983 static const uint32_t add_3_3_2
= 0x7c631214;
3984 static const uint32_t add_3_3_13
= 0x7c636a14;
3985 static const uint32_t add_3_12_2
= 0x7c6c1214;
3986 static const uint32_t add_3_12_13
= 0x7c6c6a14;
3987 static const uint32_t add_11_0_11
= 0x7d605a14;
3988 static const uint32_t add_11_2_11
= 0x7d625a14;
3989 static const uint32_t add_11_11_2
= 0x7d6b1214;
3990 static const uint32_t addi_0_12
= 0x380c0000;
3991 static const uint32_t addi_2_2
= 0x38420000;
3992 static const uint32_t addi_3_3
= 0x38630000;
3993 static const uint32_t addi_11_11
= 0x396b0000;
3994 static const uint32_t addi_12_1
= 0x39810000;
3995 static const uint32_t addi_12_12
= 0x398c0000;
3996 static const uint32_t addis_0_2
= 0x3c020000;
3997 static const uint32_t addis_0_13
= 0x3c0d0000;
3998 static const uint32_t addis_2_12
= 0x3c4c0000;
3999 static const uint32_t addis_11_2
= 0x3d620000;
4000 static const uint32_t addis_11_11
= 0x3d6b0000;
4001 static const uint32_t addis_11_30
= 0x3d7e0000;
4002 static const uint32_t addis_12_1
= 0x3d810000;
4003 static const uint32_t addis_12_2
= 0x3d820000;
4004 static const uint32_t addis_12_12
= 0x3d8c0000;
4005 static const uint32_t b
= 0x48000000;
4006 static const uint32_t bcl_20_31
= 0x429f0005;
4007 static const uint32_t bctr
= 0x4e800420;
4008 static const uint32_t bctrl
= 0x4e800421;
4009 static const uint32_t beqlr
= 0x4d820020;
4010 static const uint32_t blr
= 0x4e800020;
4011 static const uint32_t bnectr_p4
= 0x4ce20420;
4012 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
4013 static const uint32_t cmpldi_2_0
= 0x28220000;
4014 static const uint32_t cmpdi_11_0
= 0x2c2b0000;
4015 static const uint32_t cmpwi_11_0
= 0x2c0b0000;
4016 static const uint32_t cror_15_15_15
= 0x4def7b82;
4017 static const uint32_t cror_31_31_31
= 0x4ffffb82;
4018 static const uint32_t ld_0_1
= 0xe8010000;
4019 static const uint32_t ld_0_12
= 0xe80c0000;
4020 static const uint32_t ld_2_1
= 0xe8410000;
4021 static const uint32_t ld_2_2
= 0xe8420000;
4022 static const uint32_t ld_2_11
= 0xe84b0000;
4023 static const uint32_t ld_2_12
= 0xe84c0000;
4024 static const uint32_t ld_11_1
= 0xe9610000;
4025 static const uint32_t ld_11_2
= 0xe9620000;
4026 static const uint32_t ld_11_3
= 0xe9630000;
4027 static const uint32_t ld_11_11
= 0xe96b0000;
4028 static const uint32_t ld_12_2
= 0xe9820000;
4029 static const uint32_t ld_12_3
= 0xe9830000;
4030 static const uint32_t ld_12_11
= 0xe98b0000;
4031 static const uint32_t ld_12_12
= 0xe98c0000;
4032 static const uint32_t lfd_0_1
= 0xc8010000;
4033 static const uint32_t li_0_0
= 0x38000000;
4034 static const uint32_t li_12_0
= 0x39800000;
4035 static const uint32_t lis_0
= 0x3c000000;
4036 static const uint32_t lis_2
= 0x3c400000;
4037 static const uint32_t lis_11
= 0x3d600000;
4038 static const uint32_t lis_12
= 0x3d800000;
4039 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
4040 static const uint32_t lwz_0_12
= 0x800c0000;
4041 static const uint32_t lwz_11_3
= 0x81630000;
4042 static const uint32_t lwz_11_11
= 0x816b0000;
4043 static const uint32_t lwz_11_30
= 0x817e0000;
4044 static const uint32_t lwz_12_3
= 0x81830000;
4045 static const uint32_t lwz_12_12
= 0x818c0000;
4046 static const uint32_t lwzu_0_12
= 0x840c0000;
4047 static const uint32_t mflr_0
= 0x7c0802a6;
4048 static const uint32_t mflr_11
= 0x7d6802a6;
4049 static const uint32_t mflr_12
= 0x7d8802a6;
4050 static const uint32_t mr_0_3
= 0x7c601b78;
4051 static const uint32_t mr_3_0
= 0x7c030378;
4052 static const uint32_t mtctr_0
= 0x7c0903a6;
4053 static const uint32_t mtctr_11
= 0x7d6903a6;
4054 static const uint32_t mtctr_12
= 0x7d8903a6;
4055 static const uint32_t mtlr_0
= 0x7c0803a6;
4056 static const uint32_t mtlr_11
= 0x7d6803a6;
4057 static const uint32_t mtlr_12
= 0x7d8803a6;
4058 static const uint32_t nop
= 0x60000000;
4059 static const uint32_t ori_0_0_0
= 0x60000000;
4060 static const uint32_t srdi_0_0_2
= 0x7800f082;
4061 static const uint32_t std_0_1
= 0xf8010000;
4062 static const uint32_t std_0_12
= 0xf80c0000;
4063 static const uint32_t std_2_1
= 0xf8410000;
4064 static const uint32_t std_11_1
= 0xf9610000;
4065 static const uint32_t stfd_0_1
= 0xd8010000;
4066 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
4067 static const uint32_t sub_11_11_12
= 0x7d6c5850;
4068 static const uint32_t sub_12_12_11
= 0x7d8b6050;
4069 static const uint32_t xor_2_12_12
= 0x7d826278;
4070 static const uint32_t xor_11_12_12
= 0x7d8b6278;
4072 // Write out the PLT.
4074 template<int size
, bool big_endian
>
4076 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
4078 if (size
== 32 && (this->name_
[3] != 'I' && this->name_
[3] != 'L'))
4080 const section_size_type offset
= this->offset();
4081 const section_size_type oview_size
4082 = convert_to_section_size_type(this->data_size());
4083 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
4084 unsigned char* pov
= oview
;
4085 unsigned char* endpov
= oview
+ oview_size
;
4087 // The address of the .glink branch table
4088 const Output_data_glink
<size
, big_endian
>* glink
4089 = this->targ_
->glink_section();
4090 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
4092 while (pov
< endpov
)
4094 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
4099 of
->write_output_view(offset
, oview_size
, oview
);
4103 // Create the PLT section.
4105 template<int size
, bool big_endian
>
4107 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
4110 if (this->plt_
== NULL
)
4112 if (this->got_
== NULL
)
4113 this->got_section(symtab
, layout
);
4115 if (this->glink_
== NULL
)
4116 make_glink_section(layout
);
4118 // Ensure that .rela.dyn always appears before .rela.plt This is
4119 // necessary due to how, on PowerPC and some other targets, .rela.dyn
4120 // needs to include .rela.plt in its range.
4121 this->rela_dyn_section(layout
);
4123 Reloc_section
* plt_rel
= new Reloc_section(false);
4124 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
4125 elfcpp::SHF_ALLOC
, plt_rel
,
4126 ORDER_DYNAMIC_PLT_RELOCS
, false);
4128 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
4130 layout
->add_output_section_data(".plt",
4132 ? elfcpp::SHT_PROGBITS
4133 : elfcpp::SHT_NOBITS
),
4134 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4141 Output_section
* rela_plt_os
= plt_rel
->output_section();
4142 rela_plt_os
->set_info_section(this->plt_
->output_section());
4146 // Create the IPLT section.
4148 template<int size
, bool big_endian
>
4150 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
4153 if (this->iplt_
== NULL
)
4155 this->make_plt_section(symtab
, layout
);
4156 this->make_lplt_section(layout
);
4158 Reloc_section
* iplt_rel
= new Reloc_section(false);
4159 if (this->rela_dyn_
->output_section())
4160 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
4162 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
4164 if (this->plt_
->output_section())
4165 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
4169 // Create the LPLT section.
4171 template<int size
, bool big_endian
>
4173 Target_powerpc
<size
, big_endian
>::make_lplt_section(Layout
* layout
)
4175 if (this->lplt_
== NULL
)
4177 Reloc_section
* lplt_rel
= NULL
;
4178 if (parameters
->options().output_is_position_independent())
4180 lplt_rel
= new Reloc_section(false);
4181 this->rela_dyn_section(layout
);
4182 if (this->rela_dyn_
->output_section())
4183 this->rela_dyn_
->output_section()
4184 ->add_output_section_data(lplt_rel
);
4187 = new Output_data_plt_powerpc
<size
, big_endian
>(this, lplt_rel
,
4189 this->make_brlt_section(layout
);
4190 if (this->brlt_section_
&& this->brlt_section_
->output_section())
4191 this->brlt_section_
->output_section()
4192 ->add_output_section_data(this->lplt_
);
4194 layout
->add_output_section_data(".branch_lt",
4195 elfcpp::SHT_PROGBITS
,
4196 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4203 // A section for huge long branch addresses, similar to plt section.
4205 template<int size
, bool big_endian
>
4206 class Output_data_brlt_powerpc
: public Output_section_data_build
4209 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4210 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
4211 size
, big_endian
> Reloc_section
;
4213 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
4214 Reloc_section
* brlt_rel
)
4215 : Output_section_data_build(size
== 32 ? 4 : 8),
4223 this->reset_data_size();
4224 this->rel_
->reset_data_size();
4228 finalize_brlt_sizes()
4230 this->finalize_data_size();
4231 this->rel_
->finalize_data_size();
4234 // Add a reloc for an entry in the BRLT.
4236 add_reloc(Address to
, unsigned int off
)
4237 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
4239 // Update section and reloc section size.
4241 set_current_size(unsigned int num_branches
)
4243 this->reset_address_and_file_offset();
4244 this->set_current_data_size(num_branches
* 16);
4245 this->finalize_data_size();
4246 Output_section
* os
= this->output_section();
4247 os
->set_section_offsets_need_adjustment();
4248 if (this->rel_
!= NULL
)
4250 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
4251 this->rel_
->reset_address_and_file_offset();
4252 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
4253 this->rel_
->finalize_data_size();
4254 Output_section
* os
= this->rel_
->output_section();
4255 os
->set_section_offsets_need_adjustment();
4261 do_adjust_output_section(Output_section
* os
)
4266 // Write to a map file.
4268 do_print_to_mapfile(Mapfile
* mapfile
) const
4269 { mapfile
->print_output_data(this, "** BRLT"); }
4272 // Write out the BRLT data.
4274 do_write(Output_file
*);
4276 // The reloc section.
4277 Reloc_section
* rel_
;
4278 Target_powerpc
<size
, big_endian
>* targ_
;
4281 // Make the branch lookup table section.
4283 template<int size
, bool big_endian
>
4285 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
4287 if (size
== 64 && this->brlt_section_
== NULL
)
4289 Reloc_section
* brlt_rel
= NULL
;
4290 bool is_pic
= parameters
->options().output_is_position_independent();
4293 // When PIC we can't fill in .branch_lt but must initialise at
4294 // runtime via dynamic relocations.
4295 this->rela_dyn_section(layout
);
4296 brlt_rel
= new Reloc_section(false);
4297 if (this->rela_dyn_
->output_section())
4298 this->rela_dyn_
->output_section()
4299 ->add_output_section_data(brlt_rel
);
4302 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
4303 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
4304 this->plt_
->output_section()
4305 ->add_output_section_data(this->brlt_section_
);
4307 layout
->add_output_section_data(".branch_lt",
4308 elfcpp::SHT_PROGBITS
,
4309 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4310 this->brlt_section_
,
4316 // Write out .branch_lt when non-PIC.
4318 template<int size
, bool big_endian
>
4320 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
4322 if (size
== 64 && !parameters
->options().output_is_position_independent())
4324 const section_size_type offset
= this->offset();
4325 const section_size_type oview_size
4326 = convert_to_section_size_type(this->data_size());
4327 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
4329 this->targ_
->write_branch_lookup_table(oview
);
4330 of
->write_output_view(offset
, oview_size
, oview
);
4334 static inline uint32_t
4340 static inline uint32_t
4346 static inline uint32_t
4349 return hi(a
+ 0x8000);
4355 static const unsigned char eh_frame_cie
[12];
4359 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
4362 'z', 'R', 0, // Augmentation string.
4363 4, // Code alignment.
4364 0x80 - size
/ 8 , // Data alignment.
4366 1, // Augmentation size.
4367 (elfcpp::DW_EH_PE_pcrel
4368 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
4369 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
4372 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
4373 static const unsigned char glink_eh_frame_fde_64v1
[] =
4375 0, 0, 0, 0, // Replaced with offset to .glink.
4376 0, 0, 0, 0, // Replaced with size of .glink.
4377 0, // Augmentation size.
4378 elfcpp::DW_CFA_advance_loc
+ 1,
4379 elfcpp::DW_CFA_register
, 65, 12,
4380 elfcpp::DW_CFA_advance_loc
+ 5,
4381 elfcpp::DW_CFA_restore_extended
, 65
4384 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
4385 static const unsigned char glink_eh_frame_fde_64v2
[] =
4387 0, 0, 0, 0, // Replaced with offset to .glink.
4388 0, 0, 0, 0, // Replaced with size of .glink.
4389 0, // Augmentation size.
4390 elfcpp::DW_CFA_advance_loc
+ 1,
4391 elfcpp::DW_CFA_register
, 65, 0,
4392 elfcpp::DW_CFA_advance_loc
+ 7,
4393 elfcpp::DW_CFA_restore_extended
, 65
4396 // Describe __glink_PLTresolve use of LR, 32-bit version.
4397 static const unsigned char glink_eh_frame_fde_32
[] =
4399 0, 0, 0, 0, // Replaced with offset to .glink.
4400 0, 0, 0, 0, // Replaced with size of .glink.
4401 0, // Augmentation size.
4402 elfcpp::DW_CFA_advance_loc
+ 2,
4403 elfcpp::DW_CFA_register
, 65, 0,
4404 elfcpp::DW_CFA_advance_loc
+ 4,
4405 elfcpp::DW_CFA_restore_extended
, 65
4408 static const unsigned char default_fde
[] =
4410 0, 0, 0, 0, // Replaced with offset to stubs.
4411 0, 0, 0, 0, // Replaced with size of stubs.
4412 0, // Augmentation size.
4413 elfcpp::DW_CFA_nop
, // Pad.
4418 template<bool big_endian
>
4420 write_insn(unsigned char* p
, uint32_t v
)
4422 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
4426 static inline unsigned int
4429 if (!parameters
->options().user_set_plt_align())
4430 return size
== 64 ? 32 : 8;
4431 return 1 << parameters
->options().plt_align();
4434 // Stub_table holds information about plt and long branch stubs.
4435 // Stubs are built in an area following some input section determined
4436 // by group_sections(). This input section is converted to a relaxed
4437 // input section allowing it to be resized to accommodate the stubs
4439 template<int size
, bool big_endian
>
4440 class Stub_table
: public Output_relaxed_input_section
4445 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4446 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4450 unsigned int indx_
: 30;
4451 unsigned int r2save_
: 1;
4452 unsigned int localentry0_
: 1;
4454 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4455 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4457 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4458 Output_section
* output_section
,
4459 const Output_section::Input_section
* owner
,
4461 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4463 ->section_addralign(owner
->shndx())),
4464 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4465 orig_data_size_(owner
->current_data_size()),
4466 plt_size_(0), last_plt_size_(0),
4467 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4468 need_save_res_(false), uniq_(id
), tls_get_addr_opt_bctrl_(-1u),
4471 this->set_output_section(output_section
);
4473 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4474 new_relaxed
.push_back(this);
4475 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4478 // Add a plt call stub.
4480 add_plt_call_entry(Address
,
4481 const Sized_relobj_file
<size
, big_endian
>*,
4488 add_plt_call_entry(Address
,
4489 const Sized_relobj_file
<size
, big_endian
>*,
4495 // Find a given plt call stub.
4497 find_plt_call_entry(const Symbol
*) const;
4500 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4501 unsigned int) const;
4504 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4510 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4515 // Add a long branch stub.
4517 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4518 unsigned int, Address
, Address
, bool);
4521 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4525 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4527 Address max_branch_offset
= max_branch_delta(r_type
);
4528 if (max_branch_offset
== 0)
4530 gold_assert(from
!= invalid_address
);
4531 Address loc
= off
+ this->stub_address();
4532 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4536 clear_stubs(bool all
)
4538 this->plt_call_stubs_
.clear();
4539 this->plt_size_
= 0;
4540 this->long_branch_stubs_
.clear();
4541 this->branch_size_
= 0;
4542 this->need_save_res_
= false;
4545 this->last_plt_size_
= 0;
4546 this->last_branch_size_
= 0;
4551 set_address_and_size(const Output_section
* os
, Address off
)
4553 Address start_off
= off
;
4554 off
+= this->orig_data_size_
;
4555 Address my_size
= this->plt_size_
+ this->branch_size_
;
4556 if (this->need_save_res_
)
4557 my_size
+= this->targ_
->savres_section()->data_size();
4559 off
= align_address(off
, this->stub_align());
4560 // Include original section size and alignment padding in size
4561 my_size
+= off
- start_off
;
4562 // Ensure new size is always larger than min size
4563 // threshold. Alignment requirement is included in "my_size", so
4564 // increase "my_size" does not invalidate alignment.
4565 if (my_size
< this->min_size_threshold_
)
4566 my_size
= this->min_size_threshold_
;
4567 this->reset_address_and_file_offset();
4568 this->set_current_data_size(my_size
);
4569 this->set_address_and_file_offset(os
->address() + start_off
,
4570 os
->offset() + start_off
);
4575 stub_address() const
4577 return align_address(this->address() + this->orig_data_size_
,
4578 this->stub_align());
4584 return align_address(this->offset() + this->orig_data_size_
,
4585 this->stub_align());
4590 { return this->plt_size_
; }
4593 set_min_size_threshold(Address min_size
)
4594 { this->min_size_threshold_
= min_size
; }
4597 define_stub_syms(Symbol_table
*);
4602 Output_section
* os
= this->output_section();
4603 if (os
->addralign() < this->stub_align())
4605 os
->set_addralign(this->stub_align());
4606 // FIXME: get rid of the insane checkpointing.
4607 // We can't increase alignment of the input section to which
4608 // stubs are attached; The input section may be .init which
4609 // is pasted together with other .init sections to form a
4610 // function. Aligning might insert zero padding resulting in
4611 // sigill. However we do need to increase alignment of the
4612 // output section so that the align_address() on offset in
4613 // set_address_and_size() adds the same padding as the
4614 // align_address() on address in stub_address().
4615 // What's more, we need this alignment for the layout done in
4616 // relaxation_loop_body() so that the output section starts at
4617 // a suitably aligned address.
4618 os
->checkpoint_set_addralign(this->stub_align());
4620 if (this->last_plt_size_
!= this->plt_size_
4621 || this->last_branch_size_
!= this->branch_size_
)
4623 this->last_plt_size_
= this->plt_size_
;
4624 this->last_branch_size_
= this->branch_size_
;
4630 // Generate a suitable FDE to describe code in this stub group.
4634 // Add .eh_frame info for this stub section.
4636 add_eh_frame(Layout
* layout
);
4638 // Remove .eh_frame info for this stub section.
4640 remove_eh_frame(Layout
* layout
);
4642 Target_powerpc
<size
, big_endian
>*
4648 class Plt_stub_key_hash
;
4649 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4650 Plt_stub_key_hash
> Plt_stub_entries
;
4651 class Branch_stub_ent
;
4652 class Branch_stub_ent_hash
;
4653 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4654 Branch_stub_ent_hash
> Branch_stub_entries
;
4656 // Alignment of stub section.
4660 unsigned int min_align
= size
== 64 ? 32 : 16;
4661 unsigned int user_align
= 1 << parameters
->options().plt_align();
4662 return std::max(user_align
, min_align
);
4665 // Return the plt offset for the given call stub.
4667 plt_off(typename
Plt_stub_entries::const_iterator p
,
4668 const Output_data_plt_powerpc
<size
, big_endian
>** sec
) const
4670 const Symbol
* gsym
= p
->first
.sym_
;
4672 return this->targ_
->plt_off(gsym
, sec
);
4675 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4676 unsigned int local_sym_index
= p
->first
.locsym_
;
4677 return this->targ_
->plt_off(relobj
, local_sym_index
, sec
);
4681 // Size of a given plt call stub.
4683 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4687 const Symbol
* gsym
= p
->first
.sym_
;
4689 + (this->targ_
->is_tls_get_addr_opt(gsym
) ? 8 * 4 : 0));
4692 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
4693 Address plt_addr
= this->plt_off(p
, &plt
);
4694 plt_addr
+= plt
->address();
4695 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4696 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4697 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4698 got_addr
+= ppcobj
->toc_base_offset();
4699 Address off
= plt_addr
- got_addr
;
4700 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4701 const Symbol
* gsym
= p
->first
.sym_
;
4702 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4704 if (this->targ_
->abiversion() < 2)
4706 bool static_chain
= parameters
->options().plt_static_chain();
4707 bool thread_safe
= this->targ_
->plt_thread_safe();
4711 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4717 plt_call_align(unsigned int bytes
) const
4719 unsigned int align
= param_plt_align
<size
>();
4720 return (bytes
+ align
- 1) & -align
;
4723 // Return long branch stub size.
4725 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4727 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4728 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4730 unsigned int bytes
= 16;
4731 if (size
== 32 && parameters
->options().output_is_position_independent())
4737 plt_error(const Plt_stub_key
& p
);
4741 do_write(Output_file
*);
4743 // Plt call stub keys.
4747 Plt_stub_key(const Symbol
* sym
)
4748 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4751 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4752 unsigned int locsym_index
)
4753 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4756 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4758 unsigned int r_type
,
4760 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4763 this->addend_
= addend
;
4764 else if (parameters
->options().output_is_position_independent()
4765 && (r_type
== elfcpp::R_PPC_PLTREL24
4766 || r_type
== elfcpp::R_POWERPC_PLTCALL
))
4768 this->addend_
= addend
;
4769 if (this->addend_
>= 32768)
4770 this->object_
= object
;
4774 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4775 unsigned int locsym_index
,
4776 unsigned int r_type
,
4778 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4781 this->addend_
= addend
;
4782 else if (parameters
->options().output_is_position_independent()
4783 && (r_type
== elfcpp::R_PPC_PLTREL24
4784 || r_type
== elfcpp::R_POWERPC_PLTCALL
))
4785 this->addend_
= addend
;
4788 bool operator==(const Plt_stub_key
& that
) const
4790 return (this->sym_
== that
.sym_
4791 && this->object_
== that
.object_
4792 && this->addend_
== that
.addend_
4793 && this->locsym_
== that
.locsym_
);
4797 const Sized_relobj_file
<size
, big_endian
>* object_
;
4798 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4799 unsigned int locsym_
;
4802 class Plt_stub_key_hash
4805 size_t operator()(const Plt_stub_key
& ent
) const
4807 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4808 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4814 // Long branch stub keys.
4815 class Branch_stub_ent
4818 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4819 Address to
, bool save_res
)
4820 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4823 toc_base_off_
= obj
->toc_base_offset();
4826 bool operator==(const Branch_stub_ent
& that
) const
4828 return (this->dest_
== that
.dest_
4830 || this->toc_base_off_
== that
.toc_base_off_
));
4834 unsigned int toc_base_off_
;
4838 class Branch_stub_ent_hash
4841 size_t operator()(const Branch_stub_ent
& ent
) const
4842 { return ent
.dest_
^ ent
.toc_base_off_
; }
4845 // In a sane world this would be a global.
4846 Target_powerpc
<size
, big_endian
>* targ_
;
4847 // Map sym/object/addend to stub offset.
4848 Plt_stub_entries plt_call_stubs_
;
4849 // Map destination address to stub offset.
4850 Branch_stub_entries long_branch_stubs_
;
4851 // size of input section
4852 section_size_type orig_data_size_
;
4854 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4855 // Some rare cases cause (PR/20529) fluctuation in stub table
4856 // size, which leads to an endless relax loop. This is to be fixed
4857 // by, after the first few iterations, allowing only increase of
4858 // stub table size. This variable sets the minimal possible size of
4859 // a stub table, it is zero for the first few iterations, then
4860 // increases monotonically.
4861 Address min_size_threshold_
;
4862 // Set if this stub group needs a copy of out-of-line register
4863 // save/restore functions.
4864 bool need_save_res_
;
4865 // Per stub table unique identifier.
4867 // The bctrl in the __tls_get_addr_opt stub, if present.
4868 unsigned int tls_get_addr_opt_bctrl_
;
4869 // FDE unwind info for this stub group.
4870 unsigned int plt_fde_len_
;
4871 unsigned char plt_fde_
[20];
4874 // Add a plt call stub, if we do not already have one for this
4875 // sym/object/addend combo.
4877 template<int size
, bool big_endian
>
4879 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4881 const Sized_relobj_file
<size
, big_endian
>* object
,
4883 unsigned int r_type
,
4887 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4888 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4889 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4890 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4893 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4895 && this->targ_
->is_elfv2_localentry0(gsym
))
4897 p
.first
->second
.localentry0_
= 1;
4898 this->targ_
->set_has_localentry0();
4900 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4902 this->targ_
->set_has_tls_get_addr_opt();
4903 this->tls_get_addr_opt_bctrl_
= this->plt_size_
- 5 * 4;
4905 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4909 && !p
.first
->second
.localentry0_
)
4910 p
.first
->second
.r2save_
= 1;
4911 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4914 template<int size
, bool big_endian
>
4916 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4918 const Sized_relobj_file
<size
, big_endian
>* object
,
4919 unsigned int locsym_index
,
4920 unsigned int r_type
,
4924 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4925 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4926 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4927 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4930 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4931 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4933 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4935 p
.first
->second
.localentry0_
= 1;
4936 this->targ_
->set_has_localentry0();
4941 && !p
.first
->second
.localentry0_
)
4942 p
.first
->second
.r2save_
= 1;
4943 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4946 // Find a plt call stub.
4948 template<int size
, bool big_endian
>
4949 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4950 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4951 const Sized_relobj_file
<size
, big_endian
>* object
,
4953 unsigned int r_type
,
4954 Address addend
) const
4956 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4957 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4958 if (p
== this->plt_call_stubs_
.end())
4963 template<int size
, bool big_endian
>
4964 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4965 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4967 Plt_stub_key
key(gsym
);
4968 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4969 if (p
== this->plt_call_stubs_
.end())
4974 template<int size
, bool big_endian
>
4975 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4976 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4977 const Sized_relobj_file
<size
, big_endian
>* object
,
4978 unsigned int locsym_index
,
4979 unsigned int r_type
,
4980 Address addend
) const
4982 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4983 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4984 if (p
== this->plt_call_stubs_
.end())
4989 template<int size
, bool big_endian
>
4990 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4991 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4992 const Sized_relobj_file
<size
, big_endian
>* object
,
4993 unsigned int locsym_index
) const
4995 Plt_stub_key
key(object
, locsym_index
);
4996 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4997 if (p
== this->plt_call_stubs_
.end())
5002 // Add a long branch stub if we don't already have one to given
5005 template<int size
, bool big_endian
>
5007 Stub_table
<size
, big_endian
>::add_long_branch_entry(
5008 const Powerpc_relobj
<size
, big_endian
>* object
,
5009 unsigned int r_type
,
5014 Branch_stub_ent
ent(object
, to
, save_res
);
5015 Address off
= this->branch_size_
;
5016 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
5017 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
5021 this->need_save_res_
= true;
5024 unsigned int stub_size
= this->branch_stub_size(p
.first
);
5025 this->branch_size_
= off
+ stub_size
;
5026 if (size
== 64 && stub_size
!= 4)
5027 this->targ_
->add_branch_lookup_table(to
);
5030 return this->can_reach_stub(from
, off
, r_type
);
5033 // Find long branch stub offset.
5035 template<int size
, bool big_endian
>
5036 typename Stub_table
<size
, big_endian
>::Address
5037 Stub_table
<size
, big_endian
>::find_long_branch_entry(
5038 const Powerpc_relobj
<size
, big_endian
>* object
,
5041 Branch_stub_ent
ent(object
, to
, false);
5042 typename
Branch_stub_entries::const_iterator p
5043 = this->long_branch_stubs_
.find(ent
);
5044 if (p
== this->long_branch_stubs_
.end())
5045 return invalid_address
;
5046 if (p
->first
.save_res_
)
5047 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
5051 // Generate a suitable FDE to describe code in this stub group.
5052 // The __tls_get_addr_opt call stub needs to describe where it saves
5053 // LR, to support exceptions that might be thrown from __tls_get_addr.
5055 template<int size
, bool big_endian
>
5057 Stub_table
<size
, big_endian
>::init_plt_fde()
5059 unsigned char* p
= this->plt_fde_
;
5060 // offset pcrel sdata4, size udata4, and augmentation size byte.
5063 if (this->tls_get_addr_opt_bctrl_
!= -1u)
5065 unsigned int to_bctrl
= this->tls_get_addr_opt_bctrl_
/ 4;
5067 *p
++ = elfcpp::DW_CFA_advance_loc
+ to_bctrl
;
5068 else if (to_bctrl
< 256)
5070 *p
++ = elfcpp::DW_CFA_advance_loc1
;
5073 else if (to_bctrl
< 65536)
5075 *p
++ = elfcpp::DW_CFA_advance_loc2
;
5076 elfcpp::Swap
<16, big_endian
>::writeval(p
, to_bctrl
);
5081 *p
++ = elfcpp::DW_CFA_advance_loc4
;
5082 elfcpp::Swap
<32, big_endian
>::writeval(p
, to_bctrl
);
5085 *p
++ = elfcpp::DW_CFA_offset_extended_sf
;
5087 *p
++ = -(this->targ_
->stk_linker() / 8) & 0x7f;
5088 *p
++ = elfcpp::DW_CFA_advance_loc
+ 4;
5089 *p
++ = elfcpp::DW_CFA_restore_extended
;
5092 this->plt_fde_len_
= p
- this->plt_fde_
;
5095 // Add .eh_frame info for this stub section. Unlike other linker
5096 // generated .eh_frame this is added late in the link, because we
5097 // only want the .eh_frame info if this particular stub section is
5100 template<int size
, bool big_endian
>
5102 Stub_table
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
5104 if (!parameters
->options().ld_generated_unwind_info())
5107 // Since we add stub .eh_frame info late, it must be placed
5108 // after all other linker generated .eh_frame info so that
5109 // merge mapping need not be updated for input sections.
5110 // There is no provision to use a different CIE to that used
5112 if (!this->targ_
->has_glink())
5115 if (this->plt_size_
+ this->branch_size_
+ this->need_save_res_
== 0)
5118 this->init_plt_fde();
5119 layout
->add_eh_frame_for_plt(this,
5120 Eh_cie
<size
>::eh_frame_cie
,
5121 sizeof (Eh_cie
<size
>::eh_frame_cie
),
5122 this->plt_fde_
, this->plt_fde_len_
);
5125 template<int size
, bool big_endian
>
5127 Stub_table
<size
, big_endian
>::remove_eh_frame(Layout
* layout
)
5129 if (this->plt_fde_len_
!= 0)
5131 layout
->remove_eh_frame_for_plt(this,
5132 Eh_cie
<size
>::eh_frame_cie
,
5133 sizeof (Eh_cie
<size
>::eh_frame_cie
),
5134 this->plt_fde_
, this->plt_fde_len_
);
5135 this->plt_fde_len_
= 0;
5139 // A class to handle .glink.
5141 template<int size
, bool big_endian
>
5142 class Output_data_glink
: public Output_section_data
5145 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5146 static const Address invalid_address
= static_cast<Address
>(0) - 1;
5148 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
5149 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
5150 end_branch_table_(), ge_size_(0)
5154 add_eh_frame(Layout
* layout
);
5157 add_global_entry(const Symbol
*);
5160 find_global_entry(const Symbol
*) const;
5163 global_entry_align(unsigned int off
) const
5165 unsigned int align
= param_plt_align
<size
>();
5166 return (off
+ align
- 1) & -align
;
5170 global_entry_off() const
5172 return this->global_entry_align(this->end_branch_table_
);
5176 global_entry_address() const
5178 gold_assert(this->is_data_size_valid());
5179 return this->address() + this->global_entry_off();
5183 pltresolve_size() const
5187 + (this->targ_
->abiversion() < 2 ? 11 * 4 : 14 * 4));
5192 // Write to a map file.
5194 do_print_to_mapfile(Mapfile
* mapfile
) const
5195 { mapfile
->print_output_data(this, _("** glink")); }
5199 set_final_data_size();
5203 do_write(Output_file
*);
5205 // Allows access to .got and .plt for do_write.
5206 Target_powerpc
<size
, big_endian
>* targ_
;
5208 // Map sym to stub offset.
5209 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
5210 Global_entry_stub_entries global_entry_stubs_
;
5212 unsigned int end_branch_table_
, ge_size_
;
5215 template<int size
, bool big_endian
>
5217 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
5219 if (!parameters
->options().ld_generated_unwind_info())
5224 if (this->targ_
->abiversion() < 2)
5225 layout
->add_eh_frame_for_plt(this,
5226 Eh_cie
<64>::eh_frame_cie
,
5227 sizeof (Eh_cie
<64>::eh_frame_cie
),
5228 glink_eh_frame_fde_64v1
,
5229 sizeof (glink_eh_frame_fde_64v1
));
5231 layout
->add_eh_frame_for_plt(this,
5232 Eh_cie
<64>::eh_frame_cie
,
5233 sizeof (Eh_cie
<64>::eh_frame_cie
),
5234 glink_eh_frame_fde_64v2
,
5235 sizeof (glink_eh_frame_fde_64v2
));
5239 // 32-bit .glink can use the default since the CIE return
5240 // address reg, LR, is valid.
5241 layout
->add_eh_frame_for_plt(this,
5242 Eh_cie
<32>::eh_frame_cie
,
5243 sizeof (Eh_cie
<32>::eh_frame_cie
),
5245 sizeof (default_fde
));
5246 // Except where LR is used in a PIC __glink_PLTresolve.
5247 if (parameters
->options().output_is_position_independent())
5248 layout
->add_eh_frame_for_plt(this,
5249 Eh_cie
<32>::eh_frame_cie
,
5250 sizeof (Eh_cie
<32>::eh_frame_cie
),
5251 glink_eh_frame_fde_32
,
5252 sizeof (glink_eh_frame_fde_32
));
5256 template<int size
, bool big_endian
>
5258 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
5260 unsigned int off
= this->global_entry_align(this->ge_size_
);
5261 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
5262 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, off
));
5264 this->ge_size_
= off
+ 16;
5267 template<int size
, bool big_endian
>
5268 typename Output_data_glink
<size
, big_endian
>::Address
5269 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
5271 typename
Global_entry_stub_entries::const_iterator p
5272 = this->global_entry_stubs_
.find(gsym
);
5273 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
5276 template<int size
, bool big_endian
>
5278 Output_data_glink
<size
, big_endian
>::set_final_data_size()
5280 unsigned int count
= this->targ_
->plt_entry_count();
5281 section_size_type total
= 0;
5287 // space for branch table
5288 total
+= 4 * (count
- 1);
5290 total
+= -total
& 15;
5291 total
+= this->pltresolve_size();
5295 total
+= this->pltresolve_size();
5297 // space for branch table
5299 if (this->targ_
->abiversion() < 2)
5303 total
+= 4 * (count
- 0x8000);
5307 this->end_branch_table_
= total
;
5308 total
= this->global_entry_align(total
);
5309 total
+= this->ge_size_
;
5311 this->set_data_size(total
);
5314 // Define symbols on stubs, identifying the stub.
5316 template<int size
, bool big_endian
>
5318 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
5320 if (!this->plt_call_stubs_
.empty())
5322 // The key for the plt call stub hash table includes addresses,
5323 // therefore traversal order depends on those addresses, which
5324 // can change between runs if gold is a PIE. Unfortunately the
5325 // output .symtab ordering depends on the order in which symbols
5326 // are added to the linker symtab. We want reproducible output
5327 // so must sort the call stub symbols.
5328 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
5329 std::vector
<plt_iter
> sorted
;
5330 sorted
.resize(this->plt_call_stubs_
.size());
5332 for (plt_iter cs
= this->plt_call_stubs_
.begin();
5333 cs
!= this->plt_call_stubs_
.end();
5335 sorted
[cs
->second
.indx_
] = cs
;
5337 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
5339 plt_iter cs
= sorted
[i
];
5342 if (cs
->first
.addend_
!= 0)
5343 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
5346 if (cs
->first
.object_
)
5348 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5349 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5350 sprintf(obj
, "%x:", ppcobj
->uniq());
5353 const char *symname
;
5354 if (cs
->first
.sym_
== NULL
)
5356 sprintf(localname
, "%x", cs
->first
.locsym_
);
5357 symname
= localname
;
5359 else if (this->targ_
->is_tls_get_addr_opt(cs
->first
.sym_
))
5360 symname
= this->targ_
->tls_get_addr_opt()->name();
5362 symname
= cs
->first
.sym_
->name();
5363 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
5364 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
5366 = this->stub_address() - this->address() + cs
->second
.off_
;
5367 unsigned int stub_size
= this->plt_call_align(this->plt_call_size(cs
));
5368 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5372 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
5373 for (branch_iter bs
= this->long_branch_stubs_
.begin();
5374 bs
!= this->long_branch_stubs_
.end();
5377 if (bs
->first
.save_res_
)
5380 char* name
= new char[8 + 13 + 16 + 1];
5381 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
5382 static_cast<unsigned long long>(bs
->first
.dest_
));
5383 Address value
= (this->stub_address() - this->address()
5384 + this->plt_size_
+ bs
->second
);
5385 unsigned int stub_size
= this->branch_stub_size(bs
);
5386 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5390 template<int size
, bool big_endian
>
5392 Stub_table
<size
, big_endian
>::plt_error(const Plt_stub_key
& p
)
5395 gold_error(_("linkage table error against `%s'"),
5396 p
.sym_
->demangled_name().c_str());
5398 gold_error(_("linkage table error against `%s:[local %u]'"),
5399 p
.object_
->name().c_str(),
5403 // Write out plt and long branch stub code.
5405 template<int size
, bool big_endian
>
5407 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
5409 if (this->plt_call_stubs_
.empty()
5410 && this->long_branch_stubs_
.empty())
5413 const section_size_type start_off
= this->offset();
5414 const section_size_type off
= this->stub_offset();
5415 const section_size_type oview_size
=
5416 convert_to_section_size_type(this->data_size() - (off
- start_off
));
5417 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5422 const Output_data_got_powerpc
<size
, big_endian
>* got
5423 = this->targ_
->got_section();
5424 Address got_os_addr
= got
->output_section()->address();
5426 if (!this->plt_call_stubs_
.empty())
5428 // Write out plt call stubs.
5429 typename
Plt_stub_entries::const_iterator cs
;
5430 for (cs
= this->plt_call_stubs_
.begin();
5431 cs
!= this->plt_call_stubs_
.end();
5434 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
5435 Address pltoff
= this->plt_off(cs
, &plt
);
5436 Address plt_addr
= pltoff
+ plt
->address();
5437 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5438 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5439 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
5440 Address off
= plt_addr
- got_addr
;
5442 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
5443 this->plt_error(cs
->first
);
5445 bool plt_load_toc
= this->targ_
->abiversion() < 2;
5447 = plt_load_toc
&& parameters
->options().plt_static_chain();
5449 = plt_load_toc
&& this->targ_
->plt_thread_safe();
5450 bool use_fake_dep
= false;
5451 Address cmp_branch_off
= 0;
5454 unsigned int pltindex
5455 = ((pltoff
- this->targ_
->first_plt_entry_offset())
5456 / this->targ_
->plt_entry_size());
5458 = (this->targ_
->glink_section()->pltresolve_size()
5460 if (pltindex
> 32768)
5461 glinkoff
+= (pltindex
- 32768) * 4;
5463 = this->targ_
->glink_section()->address() + glinkoff
;
5465 = (this->stub_address() + cs
->second
.off_
+ 20
5466 + 4 * cs
->second
.r2save_
5467 + 4 * (ha(off
) != 0)
5468 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5469 + 4 * static_chain
);
5470 cmp_branch_off
= to
- from
;
5471 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
5474 p
= oview
+ cs
->second
.off_
;
5475 const Symbol
* gsym
= cs
->first
.sym_
;
5476 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5478 write_insn
<big_endian
>(p
, ld_11_3
+ 0);
5480 write_insn
<big_endian
>(p
, ld_12_3
+ 8);
5482 write_insn
<big_endian
>(p
, mr_0_3
);
5484 write_insn
<big_endian
>(p
, cmpdi_11_0
);
5486 write_insn
<big_endian
>(p
, add_3_12_13
);
5488 write_insn
<big_endian
>(p
, beqlr
);
5490 write_insn
<big_endian
>(p
, mr_3_0
);
5492 if (!cs
->second
.localentry0_
)
5494 write_insn
<big_endian
>(p
, mflr_11
);
5496 write_insn
<big_endian
>(p
, (std_11_1
5497 + this->targ_
->stk_linker()));
5500 use_fake_dep
= thread_safe
;
5504 if (cs
->second
.r2save_
)
5506 write_insn
<big_endian
>(p
,
5507 std_2_1
+ this->targ_
->stk_toc());
5512 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
5514 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
5519 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
5521 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
5525 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5527 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
5531 write_insn
<big_endian
>(p
, mtctr_12
);
5537 write_insn
<big_endian
>(p
, xor_2_12_12
);
5539 write_insn
<big_endian
>(p
, add_11_11_2
);
5542 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5546 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5553 if (cs
->second
.r2save_
)
5555 write_insn
<big_endian
>(p
,
5556 std_2_1
+ this->targ_
->stk_toc());
5559 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5562 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5564 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5568 write_insn
<big_endian
>(p
, mtctr_12
);
5574 write_insn
<big_endian
>(p
, xor_11_12_12
);
5576 write_insn
<big_endian
>(p
, add_2_2_11
);
5581 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5584 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5588 if (!cs
->second
.localentry0_
5589 && this->targ_
->is_tls_get_addr_opt(gsym
))
5591 write_insn
<big_endian
>(p
, bctrl
);
5593 write_insn
<big_endian
>(p
, ld_2_1
+ this->targ_
->stk_toc());
5595 write_insn
<big_endian
>(p
, ld_11_1
+ this->targ_
->stk_linker());
5597 write_insn
<big_endian
>(p
, mtlr_11
);
5599 write_insn
<big_endian
>(p
, blr
);
5601 else if (thread_safe
&& !use_fake_dep
)
5603 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5605 write_insn
<big_endian
>(p
, bnectr_p4
);
5607 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5610 write_insn
<big_endian
>(p
, bctr
);
5614 // Write out long branch stubs.
5615 typename
Branch_stub_entries::const_iterator bs
;
5616 for (bs
= this->long_branch_stubs_
.begin();
5617 bs
!= this->long_branch_stubs_
.end();
5620 if (bs
->first
.save_res_
)
5622 p
= oview
+ this->plt_size_
+ bs
->second
;
5623 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5624 Address delta
= bs
->first
.dest_
- loc
;
5625 if (delta
+ (1 << 25) < 2 << 25)
5626 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5630 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5631 gold_assert(brlt_addr
!= invalid_address
);
5632 brlt_addr
+= this->targ_
->brlt_section()->address();
5633 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5634 Address brltoff
= brlt_addr
- got_addr
;
5635 if (ha(brltoff
) == 0)
5637 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5641 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5642 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5644 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5645 write_insn
<big_endian
>(p
, bctr
);
5651 if (!this->plt_call_stubs_
.empty())
5653 // The address of _GLOBAL_OFFSET_TABLE_.
5654 Address g_o_t
= invalid_address
;
5656 // Write out plt call stubs.
5657 typename
Plt_stub_entries::const_iterator cs
;
5658 for (cs
= this->plt_call_stubs_
.begin();
5659 cs
!= this->plt_call_stubs_
.end();
5662 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
5663 Address plt_addr
= this->plt_off(cs
, &plt
);
5664 plt_addr
+= plt
->address();
5666 p
= oview
+ cs
->second
.off_
;
5667 const Symbol
* gsym
= cs
->first
.sym_
;
5668 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5670 write_insn
<big_endian
>(p
, lwz_11_3
+ 0);
5672 write_insn
<big_endian
>(p
, lwz_12_3
+ 4);
5674 write_insn
<big_endian
>(p
, mr_0_3
);
5676 write_insn
<big_endian
>(p
, cmpwi_11_0
);
5678 write_insn
<big_endian
>(p
, add_3_12_2
);
5680 write_insn
<big_endian
>(p
, beqlr
);
5682 write_insn
<big_endian
>(p
, mr_3_0
);
5684 write_insn
<big_endian
>(p
, nop
);
5687 if (parameters
->options().output_is_position_independent())
5690 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5691 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5692 (cs
->first
.object_
));
5693 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5695 unsigned int got2
= ppcobj
->got2_shndx();
5696 got_addr
= ppcobj
->get_output_section_offset(got2
);
5697 gold_assert(got_addr
!= invalid_address
);
5698 got_addr
+= (ppcobj
->output_section(got2
)->address()
5699 + cs
->first
.addend_
);
5703 if (g_o_t
== invalid_address
)
5705 const Output_data_got_powerpc
<size
, big_endian
>* got
5706 = this->targ_
->got_section();
5707 g_o_t
= got
->address() + got
->g_o_t();
5712 Address off
= plt_addr
- got_addr
;
5714 write_insn
<big_endian
>(p
, lwz_11_30
+ l(off
));
5717 write_insn
<big_endian
>(p
, addis_11_30
+ ha(off
));
5719 write_insn
<big_endian
>(p
, lwz_11_11
+ l(off
));
5724 write_insn
<big_endian
>(p
, lis_11
+ ha(plt_addr
));
5726 write_insn
<big_endian
>(p
, lwz_11_11
+ l(plt_addr
));
5729 write_insn
<big_endian
>(p
, mtctr_11
);
5731 write_insn
<big_endian
>(p
, bctr
);
5735 // Write out long branch stubs.
5736 typename
Branch_stub_entries::const_iterator bs
;
5737 for (bs
= this->long_branch_stubs_
.begin();
5738 bs
!= this->long_branch_stubs_
.end();
5741 if (bs
->first
.save_res_
)
5743 p
= oview
+ this->plt_size_
+ bs
->second
;
5744 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5745 Address delta
= bs
->first
.dest_
- loc
;
5746 if (delta
+ (1 << 25) < 2 << 25)
5747 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5748 else if (!parameters
->options().output_is_position_independent())
5750 write_insn
<big_endian
>(p
, lis_12
+ ha(bs
->first
.dest_
));
5752 write_insn
<big_endian
>(p
, addi_12_12
+ l(bs
->first
.dest_
));
5757 write_insn
<big_endian
>(p
, mflr_0
);
5759 write_insn
<big_endian
>(p
, bcl_20_31
);
5761 write_insn
<big_endian
>(p
, mflr_12
);
5763 write_insn
<big_endian
>(p
, addis_12_12
+ ha(delta
));
5765 write_insn
<big_endian
>(p
, addi_12_12
+ l(delta
));
5767 write_insn
<big_endian
>(p
, mtlr_0
);
5770 write_insn
<big_endian
>(p
, mtctr_12
);
5772 write_insn
<big_endian
>(p
, bctr
);
5775 if (this->need_save_res_
)
5777 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5778 memcpy (p
, this->targ_
->savres_section()->contents(),
5779 this->targ_
->savres_section()->data_size());
5783 // Write out .glink.
5785 template<int size
, bool big_endian
>
5787 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5789 const section_size_type off
= this->offset();
5790 const section_size_type oview_size
=
5791 convert_to_section_size_type(this->data_size());
5792 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5795 // The base address of the .plt section.
5796 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5797 Address plt_base
= this->targ_
->plt_section()->address();
5801 if (this->end_branch_table_
!= 0)
5803 // Write pltresolve stub.
5805 Address after_bcl
= this->address() + 16;
5806 Address pltoff
= plt_base
- after_bcl
;
5808 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5810 if (this->targ_
->abiversion() < 2)
5812 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5813 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5814 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5815 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5816 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5817 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5818 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5819 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5820 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5821 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5825 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5826 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5827 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5828 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5829 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5830 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5831 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5832 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5833 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5834 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5835 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5836 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5837 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5839 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5840 gold_assert(p
== oview
+ this->pltresolve_size());
5842 // Write lazy link call stubs.
5844 while (p
< oview
+ this->end_branch_table_
)
5846 if (this->targ_
->abiversion() < 2)
5850 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5854 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5855 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5858 uint32_t branch_off
= 8 - (p
- oview
);
5859 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5864 Address plt_base
= this->targ_
->plt_section()->address();
5865 Address iplt_base
= invalid_address
;
5866 unsigned int global_entry_off
= this->global_entry_off();
5867 Address global_entry_base
= this->address() + global_entry_off
;
5868 typename
Global_entry_stub_entries::const_iterator ge
;
5869 for (ge
= this->global_entry_stubs_
.begin();
5870 ge
!= this->global_entry_stubs_
.end();
5873 p
= oview
+ global_entry_off
+ ge
->second
;
5874 Address plt_addr
= ge
->first
->plt_offset();
5875 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5876 && ge
->first
->can_use_relative_reloc(false))
5878 if (iplt_base
== invalid_address
)
5879 iplt_base
= this->targ_
->iplt_section()->address();
5880 plt_addr
+= iplt_base
;
5883 plt_addr
+= plt_base
;
5884 Address my_addr
= global_entry_base
+ ge
->second
;
5885 Address off
= plt_addr
- my_addr
;
5887 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5888 gold_error(_("linkage table error against `%s'"),
5889 ge
->first
->demangled_name().c_str());
5891 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5892 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5893 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5894 write_insn
<big_endian
>(p
, bctr
);
5899 const Output_data_got_powerpc
<size
, big_endian
>* got
5900 = this->targ_
->got_section();
5901 // The address of _GLOBAL_OFFSET_TABLE_.
5902 Address g_o_t
= got
->address() + got
->g_o_t();
5904 // Write out pltresolve branch table.
5906 unsigned int the_end
= oview_size
- this->pltresolve_size();
5907 unsigned char* end_p
= oview
+ the_end
;
5908 while (p
< end_p
- 8 * 4)
5909 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5911 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5913 // Write out pltresolve call stub.
5914 end_p
= oview
+ oview_size
;
5915 if (parameters
->options().output_is_position_independent())
5917 Address res0_off
= 0;
5918 Address after_bcl_off
= the_end
+ 12;
5919 Address bcl_res0
= after_bcl_off
- res0_off
;
5921 write_insn
<big_endian
>(p
, addis_11_11
+ ha(bcl_res0
));
5923 write_insn
<big_endian
>(p
, mflr_0
);
5925 write_insn
<big_endian
>(p
, bcl_20_31
);
5927 write_insn
<big_endian
>(p
, addi_11_11
+ l(bcl_res0
));
5929 write_insn
<big_endian
>(p
, mflr_12
);
5931 write_insn
<big_endian
>(p
, mtlr_0
);
5933 write_insn
<big_endian
>(p
, sub_11_11_12
);
5936 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5938 write_insn
<big_endian
>(p
, addis_12_12
+ ha(got_bcl
));
5940 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5942 write_insn
<big_endian
>(p
, lwz_0_12
+ l(got_bcl
));
5944 write_insn
<big_endian
>(p
, lwz_12_12
+ l(got_bcl
+ 4));
5948 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(got_bcl
));
5950 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5953 write_insn
<big_endian
>(p
, mtctr_0
);
5955 write_insn
<big_endian
>(p
, add_0_11_11
);
5957 write_insn
<big_endian
>(p
, add_11_0_11
);
5961 Address res0
= this->address();
5963 write_insn
<big_endian
>(p
, lis_12
+ ha(g_o_t
+ 4));
5965 write_insn
<big_endian
>(p
, addis_11_11
+ ha(-res0
));
5967 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5968 write_insn
<big_endian
>(p
, lwz_0_12
+ l(g_o_t
+ 4));
5970 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(g_o_t
+ 4));
5972 write_insn
<big_endian
>(p
, addi_11_11
+ l(-res0
));
5974 write_insn
<big_endian
>(p
, mtctr_0
);
5976 write_insn
<big_endian
>(p
, add_0_11_11
);
5978 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5979 write_insn
<big_endian
>(p
, lwz_12_12
+ l(g_o_t
+ 8));
5981 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5983 write_insn
<big_endian
>(p
, add_11_0_11
);
5986 write_insn
<big_endian
>(p
, bctr
);
5990 write_insn
<big_endian
>(p
, nop
);
5995 of
->write_output_view(off
, oview_size
, oview
);
5999 // A class to handle linker generated save/restore functions.
6001 template<int size
, bool big_endian
>
6002 class Output_data_save_res
: public Output_section_data_build
6005 Output_data_save_res(Symbol_table
* symtab
);
6007 const unsigned char*
6014 // Write to a map file.
6016 do_print_to_mapfile(Mapfile
* mapfile
) const
6017 { mapfile
->print_output_data(this, _("** save/restore")); }
6020 do_write(Output_file
*);
6023 // The maximum size of save/restore contents.
6024 static const unsigned int savres_max
= 218*4;
6027 savres_define(Symbol_table
* symtab
,
6029 unsigned int lo
, unsigned int hi
,
6030 unsigned char* write_ent(unsigned char*, int),
6031 unsigned char* write_tail(unsigned char*, int));
6033 unsigned char *contents_
;
6036 template<bool big_endian
>
6037 static unsigned char*
6038 savegpr0(unsigned char* p
, int r
)
6040 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6041 write_insn
<big_endian
>(p
, insn
);
6045 template<bool big_endian
>
6046 static unsigned char*
6047 savegpr0_tail(unsigned char* p
, int r
)
6049 p
= savegpr0
<big_endian
>(p
, r
);
6050 uint32_t insn
= std_0_1
+ 16;
6051 write_insn
<big_endian
>(p
, insn
);
6053 write_insn
<big_endian
>(p
, blr
);
6057 template<bool big_endian
>
6058 static unsigned char*
6059 restgpr0(unsigned char* p
, int r
)
6061 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6062 write_insn
<big_endian
>(p
, insn
);
6066 template<bool big_endian
>
6067 static unsigned char*
6068 restgpr0_tail(unsigned char* p
, int r
)
6070 uint32_t insn
= ld_0_1
+ 16;
6071 write_insn
<big_endian
>(p
, insn
);
6073 p
= restgpr0
<big_endian
>(p
, r
);
6074 write_insn
<big_endian
>(p
, mtlr_0
);
6078 p
= restgpr0
<big_endian
>(p
, 30);
6079 p
= restgpr0
<big_endian
>(p
, 31);
6081 write_insn
<big_endian
>(p
, blr
);
6085 template<bool big_endian
>
6086 static unsigned char*
6087 savegpr1(unsigned char* p
, int r
)
6089 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6090 write_insn
<big_endian
>(p
, insn
);
6094 template<bool big_endian
>
6095 static unsigned char*
6096 savegpr1_tail(unsigned char* p
, int r
)
6098 p
= savegpr1
<big_endian
>(p
, r
);
6099 write_insn
<big_endian
>(p
, blr
);
6103 template<bool big_endian
>
6104 static unsigned char*
6105 restgpr1(unsigned char* p
, int r
)
6107 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6108 write_insn
<big_endian
>(p
, insn
);
6112 template<bool big_endian
>
6113 static unsigned char*
6114 restgpr1_tail(unsigned char* p
, int r
)
6116 p
= restgpr1
<big_endian
>(p
, r
);
6117 write_insn
<big_endian
>(p
, blr
);
6121 template<bool big_endian
>
6122 static unsigned char*
6123 savefpr(unsigned char* p
, int r
)
6125 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6126 write_insn
<big_endian
>(p
, insn
);
6130 template<bool big_endian
>
6131 static unsigned char*
6132 savefpr0_tail(unsigned char* p
, int r
)
6134 p
= savefpr
<big_endian
>(p
, r
);
6135 write_insn
<big_endian
>(p
, std_0_1
+ 16);
6137 write_insn
<big_endian
>(p
, blr
);
6141 template<bool big_endian
>
6142 static unsigned char*
6143 restfpr(unsigned char* p
, int r
)
6145 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6146 write_insn
<big_endian
>(p
, insn
);
6150 template<bool big_endian
>
6151 static unsigned char*
6152 restfpr0_tail(unsigned char* p
, int r
)
6154 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
6156 p
= restfpr
<big_endian
>(p
, r
);
6157 write_insn
<big_endian
>(p
, mtlr_0
);
6161 p
= restfpr
<big_endian
>(p
, 30);
6162 p
= restfpr
<big_endian
>(p
, 31);
6164 write_insn
<big_endian
>(p
, blr
);
6168 template<bool big_endian
>
6169 static unsigned char*
6170 savefpr1_tail(unsigned char* p
, int r
)
6172 p
= savefpr
<big_endian
>(p
, r
);
6173 write_insn
<big_endian
>(p
, blr
);
6177 template<bool big_endian
>
6178 static unsigned char*
6179 restfpr1_tail(unsigned char* p
, int r
)
6181 p
= restfpr
<big_endian
>(p
, r
);
6182 write_insn
<big_endian
>(p
, blr
);
6186 template<bool big_endian
>
6187 static unsigned char*
6188 savevr(unsigned char* p
, int r
)
6190 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
6191 write_insn
<big_endian
>(p
, insn
);
6193 insn
= stvx_0_12_0
+ (r
<< 21);
6194 write_insn
<big_endian
>(p
, insn
);
6198 template<bool big_endian
>
6199 static unsigned char*
6200 savevr_tail(unsigned char* p
, int r
)
6202 p
= savevr
<big_endian
>(p
, r
);
6203 write_insn
<big_endian
>(p
, blr
);
6207 template<bool big_endian
>
6208 static unsigned char*
6209 restvr(unsigned char* p
, int r
)
6211 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
6212 write_insn
<big_endian
>(p
, insn
);
6214 insn
= lvx_0_12_0
+ (r
<< 21);
6215 write_insn
<big_endian
>(p
, insn
);
6219 template<bool big_endian
>
6220 static unsigned char*
6221 restvr_tail(unsigned char* p
, int r
)
6223 p
= restvr
<big_endian
>(p
, r
);
6224 write_insn
<big_endian
>(p
, blr
);
6229 template<int size
, bool big_endian
>
6230 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
6231 Symbol_table
* symtab
)
6232 : Output_section_data_build(4),
6235 this->savres_define(symtab
,
6236 "_savegpr0_", 14, 31,
6237 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
6238 this->savres_define(symtab
,
6239 "_restgpr0_", 14, 29,
6240 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6241 this->savres_define(symtab
,
6242 "_restgpr0_", 30, 31,
6243 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6244 this->savres_define(symtab
,
6245 "_savegpr1_", 14, 31,
6246 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
6247 this->savres_define(symtab
,
6248 "_restgpr1_", 14, 31,
6249 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
6250 this->savres_define(symtab
,
6251 "_savefpr_", 14, 31,
6252 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
6253 this->savres_define(symtab
,
6254 "_restfpr_", 14, 29,
6255 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6256 this->savres_define(symtab
,
6257 "_restfpr_", 30, 31,
6258 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6259 this->savres_define(symtab
,
6261 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
6262 this->savres_define(symtab
,
6264 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
6265 this->savres_define(symtab
,
6267 savevr
<big_endian
>, savevr_tail
<big_endian
>);
6268 this->savres_define(symtab
,
6270 restvr
<big_endian
>, restvr_tail
<big_endian
>);
6273 template<int size
, bool big_endian
>
6275 Output_data_save_res
<size
, big_endian
>::savres_define(
6276 Symbol_table
* symtab
,
6278 unsigned int lo
, unsigned int hi
,
6279 unsigned char* write_ent(unsigned char*, int),
6280 unsigned char* write_tail(unsigned char*, int))
6282 size_t len
= strlen(name
);
6283 bool writing
= false;
6286 memcpy(sym
, name
, len
);
6289 for (unsigned int i
= lo
; i
<= hi
; i
++)
6291 sym
[len
+ 0] = i
/ 10 + '0';
6292 sym
[len
+ 1] = i
% 10 + '0';
6293 Symbol
* gsym
= symtab
->lookup(sym
);
6294 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
6295 writing
= writing
|| refd
;
6298 if (this->contents_
== NULL
)
6299 this->contents_
= new unsigned char[this->savres_max
];
6301 section_size_type value
= this->current_data_size();
6302 unsigned char* p
= this->contents_
+ value
;
6304 p
= write_ent(p
, i
);
6306 p
= write_tail(p
, i
);
6307 section_size_type cur_size
= p
- this->contents_
;
6308 this->set_current_data_size(cur_size
);
6310 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
6311 this, value
, cur_size
- value
,
6312 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
6313 elfcpp::STV_HIDDEN
, 0, false, false);
6318 // Write out save/restore.
6320 template<int size
, bool big_endian
>
6322 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
6324 const section_size_type off
= this->offset();
6325 const section_size_type oview_size
=
6326 convert_to_section_size_type(this->data_size());
6327 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
6328 memcpy(oview
, this->contents_
, oview_size
);
6329 of
->write_output_view(off
, oview_size
, oview
);
6333 // Create the glink section.
6335 template<int size
, bool big_endian
>
6337 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
6339 if (this->glink_
== NULL
)
6341 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
6342 this->glink_
->add_eh_frame(layout
);
6343 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6344 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6345 this->glink_
, ORDER_TEXT
, false);
6349 // Create a PLT entry for a global symbol.
6351 template<int size
, bool big_endian
>
6353 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
6357 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
6358 && gsym
->can_use_relative_reloc(false))
6360 if (this->iplt_
== NULL
)
6361 this->make_iplt_section(symtab
, layout
);
6362 this->iplt_
->add_ifunc_entry(gsym
);
6366 if (this->plt_
== NULL
)
6367 this->make_plt_section(symtab
, layout
);
6368 this->plt_
->add_entry(gsym
);
6372 // Make a PLT entry for a local symbol.
6374 template<int size
, bool big_endian
>
6376 Target_powerpc
<size
, big_endian
>::make_local_plt_entry(
6378 Sized_relobj_file
<size
, big_endian
>* relobj
,
6381 if (this->lplt_
== NULL
)
6382 this->make_lplt_section(layout
);
6383 this->lplt_
->add_local_entry(relobj
, r_sym
);
6386 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
6388 template<int size
, bool big_endian
>
6390 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
6391 Symbol_table
* symtab
,
6393 Sized_relobj_file
<size
, big_endian
>* relobj
,
6396 if (this->iplt_
== NULL
)
6397 this->make_iplt_section(symtab
, layout
);
6398 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
6401 // Return the number of entries in the PLT.
6403 template<int size
, bool big_endian
>
6405 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
6407 if (this->plt_
== NULL
)
6409 return this->plt_
->entry_count();
6412 // Create a GOT entry for local dynamic __tls_get_addr calls.
6414 template<int size
, bool big_endian
>
6416 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
6417 Symbol_table
* symtab
,
6419 Sized_relobj_file
<size
, big_endian
>* object
)
6421 if (this->tlsld_got_offset_
== -1U)
6423 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
6424 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
6425 Output_data_got_powerpc
<size
, big_endian
>* got
6426 = this->got_section(symtab
, layout
);
6427 unsigned int got_offset
= got
->add_constant_pair(0, 0);
6428 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
6430 this->tlsld_got_offset_
= got_offset
;
6432 return this->tlsld_got_offset_
;
6435 // Get the Reference_flags for a particular relocation.
6437 template<int size
, bool big_endian
>
6439 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
6440 unsigned int r_type
,
6441 const Target_powerpc
* target
)
6447 case elfcpp::R_POWERPC_NONE
:
6448 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6449 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6450 case elfcpp::R_PPC64_TOC
:
6451 // No symbol reference.
6454 case elfcpp::R_PPC64_ADDR64
:
6455 case elfcpp::R_PPC64_UADDR64
:
6456 case elfcpp::R_POWERPC_ADDR32
:
6457 case elfcpp::R_POWERPC_UADDR32
:
6458 case elfcpp::R_POWERPC_ADDR16
:
6459 case elfcpp::R_POWERPC_UADDR16
:
6460 case elfcpp::R_POWERPC_ADDR16_LO
:
6461 case elfcpp::R_POWERPC_ADDR16_HI
:
6462 case elfcpp::R_POWERPC_ADDR16_HA
:
6463 ref
= Symbol::ABSOLUTE_REF
;
6466 case elfcpp::R_POWERPC_ADDR24
:
6467 case elfcpp::R_POWERPC_ADDR14
:
6468 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6469 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6470 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
6473 case elfcpp::R_PPC64_REL64
:
6474 case elfcpp::R_POWERPC_REL32
:
6475 case elfcpp::R_PPC_LOCAL24PC
:
6476 case elfcpp::R_POWERPC_REL16
:
6477 case elfcpp::R_POWERPC_REL16_LO
:
6478 case elfcpp::R_POWERPC_REL16_HI
:
6479 case elfcpp::R_POWERPC_REL16_HA
:
6480 case elfcpp::R_PPC64_REL16_HIGH
:
6481 case elfcpp::R_PPC64_REL16_HIGHA
:
6482 case elfcpp::R_PPC64_REL16_HIGHER
:
6483 case elfcpp::R_PPC64_REL16_HIGHERA
:
6484 case elfcpp::R_PPC64_REL16_HIGHEST
:
6485 case elfcpp::R_PPC64_REL16_HIGHESTA
:
6486 ref
= Symbol::RELATIVE_REF
;
6489 case elfcpp::R_POWERPC_REL24
:
6490 case elfcpp::R_PPC_PLTREL24
:
6491 case elfcpp::R_POWERPC_REL14
:
6492 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6493 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6494 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
6497 case elfcpp::R_POWERPC_GOT16
:
6498 case elfcpp::R_POWERPC_GOT16_LO
:
6499 case elfcpp::R_POWERPC_GOT16_HI
:
6500 case elfcpp::R_POWERPC_GOT16_HA
:
6501 case elfcpp::R_PPC64_GOT16_DS
:
6502 case elfcpp::R_PPC64_GOT16_LO_DS
:
6503 case elfcpp::R_PPC64_TOC16
:
6504 case elfcpp::R_PPC64_TOC16_LO
:
6505 case elfcpp::R_PPC64_TOC16_HI
:
6506 case elfcpp::R_PPC64_TOC16_HA
:
6507 case elfcpp::R_PPC64_TOC16_DS
:
6508 case elfcpp::R_PPC64_TOC16_LO_DS
:
6509 case elfcpp::R_POWERPC_PLT16_LO
:
6510 case elfcpp::R_POWERPC_PLT16_HI
:
6511 case elfcpp::R_POWERPC_PLT16_HA
:
6512 case elfcpp::R_PPC64_PLT16_LO_DS
:
6513 ref
= Symbol::RELATIVE_REF
;
6516 case elfcpp::R_POWERPC_GOT_TPREL16
:
6517 case elfcpp::R_POWERPC_TLS
:
6518 ref
= Symbol::TLS_REF
;
6521 case elfcpp::R_POWERPC_COPY
:
6522 case elfcpp::R_POWERPC_GLOB_DAT
:
6523 case elfcpp::R_POWERPC_JMP_SLOT
:
6524 case elfcpp::R_POWERPC_RELATIVE
:
6525 case elfcpp::R_POWERPC_DTPMOD
:
6527 // Not expected. We will give an error later.
6531 if (size
== 64 && target
->abiversion() < 2)
6532 ref
|= Symbol::FUNC_DESC_ABI
;
6536 // Report an unsupported relocation against a local symbol.
6538 template<int size
, bool big_endian
>
6540 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
6541 Sized_relobj_file
<size
, big_endian
>* object
,
6542 unsigned int r_type
)
6544 gold_error(_("%s: unsupported reloc %u against local symbol"),
6545 object
->name().c_str(), r_type
);
6548 // We are about to emit a dynamic relocation of type R_TYPE. If the
6549 // dynamic linker does not support it, issue an error.
6551 template<int size
, bool big_endian
>
6553 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
6554 unsigned int r_type
)
6556 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
6558 // These are the relocation types supported by glibc for both 32-bit
6559 // and 64-bit powerpc.
6562 case elfcpp::R_POWERPC_NONE
:
6563 case elfcpp::R_POWERPC_RELATIVE
:
6564 case elfcpp::R_POWERPC_GLOB_DAT
:
6565 case elfcpp::R_POWERPC_DTPMOD
:
6566 case elfcpp::R_POWERPC_DTPREL
:
6567 case elfcpp::R_POWERPC_TPREL
:
6568 case elfcpp::R_POWERPC_JMP_SLOT
:
6569 case elfcpp::R_POWERPC_COPY
:
6570 case elfcpp::R_POWERPC_IRELATIVE
:
6571 case elfcpp::R_POWERPC_ADDR32
:
6572 case elfcpp::R_POWERPC_UADDR32
:
6573 case elfcpp::R_POWERPC_ADDR24
:
6574 case elfcpp::R_POWERPC_ADDR16
:
6575 case elfcpp::R_POWERPC_UADDR16
:
6576 case elfcpp::R_POWERPC_ADDR16_LO
:
6577 case elfcpp::R_POWERPC_ADDR16_HI
:
6578 case elfcpp::R_POWERPC_ADDR16_HA
:
6579 case elfcpp::R_POWERPC_ADDR14
:
6580 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6581 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6582 case elfcpp::R_POWERPC_REL32
:
6583 case elfcpp::R_POWERPC_REL24
:
6584 case elfcpp::R_POWERPC_TPREL16
:
6585 case elfcpp::R_POWERPC_TPREL16_LO
:
6586 case elfcpp::R_POWERPC_TPREL16_HI
:
6587 case elfcpp::R_POWERPC_TPREL16_HA
:
6598 // These are the relocation types supported only on 64-bit.
6599 case elfcpp::R_PPC64_ADDR64
:
6600 case elfcpp::R_PPC64_UADDR64
:
6601 case elfcpp::R_PPC64_JMP_IREL
:
6602 case elfcpp::R_PPC64_ADDR16_DS
:
6603 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6604 case elfcpp::R_PPC64_ADDR16_HIGH
:
6605 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6606 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6607 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6608 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6609 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6610 case elfcpp::R_PPC64_REL64
:
6611 case elfcpp::R_POWERPC_ADDR30
:
6612 case elfcpp::R_PPC64_TPREL16_DS
:
6613 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6614 case elfcpp::R_PPC64_TPREL16_HIGH
:
6615 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6616 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6617 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6618 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6619 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6630 // These are the relocation types supported only on 32-bit.
6631 // ??? glibc ld.so doesn't need to support these.
6632 case elfcpp::R_POWERPC_DTPREL16
:
6633 case elfcpp::R_POWERPC_DTPREL16_LO
:
6634 case elfcpp::R_POWERPC_DTPREL16_HI
:
6635 case elfcpp::R_POWERPC_DTPREL16_HA
:
6643 // This prevents us from issuing more than one error per reloc
6644 // section. But we can still wind up issuing more than one
6645 // error per object file.
6646 if (this->issued_non_pic_error_
)
6648 gold_assert(parameters
->options().output_is_position_independent());
6649 object
->error(_("requires unsupported dynamic reloc; "
6650 "recompile with -fPIC"));
6651 this->issued_non_pic_error_
= true;
6655 // Return whether we need to make a PLT entry for a relocation of the
6656 // given type against a STT_GNU_IFUNC symbol.
6658 template<int size
, bool big_endian
>
6660 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6661 Target_powerpc
<size
, big_endian
>* target
,
6662 Sized_relobj_file
<size
, big_endian
>* object
,
6663 unsigned int r_type
,
6666 // In non-pic code any reference will resolve to the plt call stub
6667 // for the ifunc symbol.
6668 if ((size
== 32 || target
->abiversion() >= 2)
6669 && !parameters
->options().output_is_position_independent())
6674 // Word size refs from data sections are OK, but don't need a PLT entry.
6675 case elfcpp::R_POWERPC_ADDR32
:
6676 case elfcpp::R_POWERPC_UADDR32
:
6681 case elfcpp::R_PPC64_ADDR64
:
6682 case elfcpp::R_PPC64_UADDR64
:
6687 // GOT refs are good, but also don't need a PLT entry.
6688 case elfcpp::R_POWERPC_GOT16
:
6689 case elfcpp::R_POWERPC_GOT16_LO
:
6690 case elfcpp::R_POWERPC_GOT16_HI
:
6691 case elfcpp::R_POWERPC_GOT16_HA
:
6692 case elfcpp::R_PPC64_GOT16_DS
:
6693 case elfcpp::R_PPC64_GOT16_LO_DS
:
6696 // PLT relocs are OK and need a PLT entry.
6697 case elfcpp::R_POWERPC_PLT16_LO
:
6698 case elfcpp::R_POWERPC_PLT16_HI
:
6699 case elfcpp::R_POWERPC_PLT16_HA
:
6700 case elfcpp::R_PPC64_PLT16_LO_DS
:
6701 case elfcpp::R_POWERPC_PLTSEQ
:
6702 case elfcpp::R_POWERPC_PLTCALL
:
6706 // Function calls are good, and these do need a PLT entry.
6707 case elfcpp::R_POWERPC_ADDR24
:
6708 case elfcpp::R_POWERPC_ADDR14
:
6709 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6710 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6711 case elfcpp::R_POWERPC_REL24
:
6712 case elfcpp::R_PPC_PLTREL24
:
6713 case elfcpp::R_POWERPC_REL14
:
6714 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6715 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6722 // Anything else is a problem.
6723 // If we are building a static executable, the libc startup function
6724 // responsible for applying indirect function relocations is going
6725 // to complain about the reloc type.
6726 // If we are building a dynamic executable, we will have a text
6727 // relocation. The dynamic loader will set the text segment
6728 // writable and non-executable to apply text relocations. So we'll
6729 // segfault when trying to run the indirection function to resolve
6732 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6733 object
->name().c_str(), r_type
);
6737 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6741 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6743 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6744 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6745 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6746 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6747 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6748 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6749 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6750 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6751 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6752 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6753 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6754 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6755 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6756 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6757 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6758 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6759 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6760 /* Exclude lfqu by testing reloc. If relocs are ever
6761 defined for the reduced D field in psq_lu then those
6762 will need testing too. */
6763 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6764 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6765 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6767 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6768 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6769 /* Exclude stfqu. psq_stu as above for psq_lu. */
6770 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6771 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6772 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6773 && (insn
& 1) == 0));
6776 // Scan a relocation for a local symbol.
6778 template<int size
, bool big_endian
>
6780 Target_powerpc
<size
, big_endian
>::Scan::local(
6781 Symbol_table
* symtab
,
6783 Target_powerpc
<size
, big_endian
>* target
,
6784 Sized_relobj_file
<size
, big_endian
>* object
,
6785 unsigned int data_shndx
,
6786 Output_section
* output_section
,
6787 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6788 unsigned int r_type
,
6789 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6792 this->maybe_skip_tls_get_addr_call(target
, r_type
, NULL
);
6794 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6795 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6797 this->expect_tls_get_addr_call();
6798 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6799 if (tls_type
!= tls::TLSOPT_NONE
)
6800 this->skip_next_tls_get_addr_call();
6802 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6803 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6805 this->expect_tls_get_addr_call();
6806 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6807 if (tls_type
!= tls::TLSOPT_NONE
)
6808 this->skip_next_tls_get_addr_call();
6811 Powerpc_relobj
<size
, big_endian
>* ppc_object
6812 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6817 && data_shndx
== ppc_object
->opd_shndx()
6818 && r_type
== elfcpp::R_PPC64_ADDR64
)
6819 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6823 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6824 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6825 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6827 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6828 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6829 r_type
, r_sym
, reloc
.get_r_addend());
6830 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6835 case elfcpp::R_POWERPC_NONE
:
6836 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6837 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6838 case elfcpp::R_POWERPC_TLS
:
6839 case elfcpp::R_PPC64_ENTRY
:
6840 case elfcpp::R_POWERPC_PLTSEQ
:
6841 case elfcpp::R_POWERPC_PLTCALL
:
6844 case elfcpp::R_PPC64_TOC
:
6846 Output_data_got_powerpc
<size
, big_endian
>* got
6847 = target
->got_section(symtab
, layout
);
6848 if (parameters
->options().output_is_position_independent())
6850 Address off
= reloc
.get_r_offset();
6852 && target
->abiversion() < 2
6853 && data_shndx
== ppc_object
->opd_shndx()
6854 && ppc_object
->get_opd_discard(off
- 8))
6857 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6858 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6859 rela_dyn
->add_output_section_relative(got
->output_section(),
6860 elfcpp::R_POWERPC_RELATIVE
,
6862 object
, data_shndx
, off
,
6863 symobj
->toc_base_offset());
6868 case elfcpp::R_PPC64_ADDR64
:
6869 case elfcpp::R_PPC64_UADDR64
:
6870 case elfcpp::R_POWERPC_ADDR32
:
6871 case elfcpp::R_POWERPC_UADDR32
:
6872 case elfcpp::R_POWERPC_ADDR24
:
6873 case elfcpp::R_POWERPC_ADDR16
:
6874 case elfcpp::R_POWERPC_ADDR16_LO
:
6875 case elfcpp::R_POWERPC_ADDR16_HI
:
6876 case elfcpp::R_POWERPC_ADDR16_HA
:
6877 case elfcpp::R_POWERPC_UADDR16
:
6878 case elfcpp::R_PPC64_ADDR16_HIGH
:
6879 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6880 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6881 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6882 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6883 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6884 case elfcpp::R_PPC64_ADDR16_DS
:
6885 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6886 case elfcpp::R_POWERPC_ADDR14
:
6887 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6888 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6889 // If building a shared library (or a position-independent
6890 // executable), we need to create a dynamic relocation for
6892 if (parameters
->options().output_is_position_independent()
6893 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6895 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6897 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6898 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6899 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6901 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6902 : elfcpp::R_POWERPC_RELATIVE
);
6903 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6904 output_section
, data_shndx
,
6905 reloc
.get_r_offset(),
6906 reloc
.get_r_addend(), false);
6908 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6910 check_non_pic(object
, r_type
);
6911 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6912 data_shndx
, reloc
.get_r_offset(),
6913 reloc
.get_r_addend());
6917 gold_assert(lsym
.get_st_value() == 0);
6918 unsigned int shndx
= lsym
.get_st_shndx();
6920 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6923 object
->error(_("section symbol %u has bad shndx %u"),
6926 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6927 output_section
, data_shndx
,
6928 reloc
.get_r_offset());
6933 case elfcpp::R_POWERPC_PLT16_LO
:
6934 case elfcpp::R_POWERPC_PLT16_HI
:
6935 case elfcpp::R_POWERPC_PLT16_HA
:
6936 case elfcpp::R_PPC64_PLT16_LO_DS
:
6939 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6940 target
->make_local_plt_entry(layout
, object
, r_sym
);
6944 case elfcpp::R_POWERPC_REL24
:
6945 case elfcpp::R_PPC_PLTREL24
:
6946 case elfcpp::R_PPC_LOCAL24PC
:
6947 case elfcpp::R_POWERPC_REL14
:
6948 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6949 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6952 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6953 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6954 r_type
, r_sym
, reloc
.get_r_addend());
6958 case elfcpp::R_PPC64_TOCSAVE
:
6959 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6960 // caller has already saved r2 and thus a plt call stub need not
6963 && target
->mark_pltcall(ppc_object
, data_shndx
,
6964 reloc
.get_r_offset() - 4, symtab
))
6966 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6967 unsigned int shndx
= lsym
.get_st_shndx();
6969 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6971 object
->error(_("tocsave symbol %u has bad shndx %u"),
6974 target
->add_tocsave(ppc_object
, shndx
,
6975 lsym
.get_st_value() + reloc
.get_r_addend());
6979 case elfcpp::R_PPC64_REL64
:
6980 case elfcpp::R_POWERPC_REL32
:
6981 case elfcpp::R_POWERPC_REL16
:
6982 case elfcpp::R_POWERPC_REL16_LO
:
6983 case elfcpp::R_POWERPC_REL16_HI
:
6984 case elfcpp::R_POWERPC_REL16_HA
:
6985 case elfcpp::R_POWERPC_REL16DX_HA
:
6986 case elfcpp::R_PPC64_REL16_HIGH
:
6987 case elfcpp::R_PPC64_REL16_HIGHA
:
6988 case elfcpp::R_PPC64_REL16_HIGHER
:
6989 case elfcpp::R_PPC64_REL16_HIGHERA
:
6990 case elfcpp::R_PPC64_REL16_HIGHEST
:
6991 case elfcpp::R_PPC64_REL16_HIGHESTA
:
6992 case elfcpp::R_POWERPC_SECTOFF
:
6993 case elfcpp::R_POWERPC_SECTOFF_LO
:
6994 case elfcpp::R_POWERPC_SECTOFF_HI
:
6995 case elfcpp::R_POWERPC_SECTOFF_HA
:
6996 case elfcpp::R_PPC64_SECTOFF_DS
:
6997 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6998 case elfcpp::R_POWERPC_TPREL16
:
6999 case elfcpp::R_POWERPC_TPREL16_LO
:
7000 case elfcpp::R_POWERPC_TPREL16_HI
:
7001 case elfcpp::R_POWERPC_TPREL16_HA
:
7002 case elfcpp::R_PPC64_TPREL16_DS
:
7003 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7004 case elfcpp::R_PPC64_TPREL16_HIGH
:
7005 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7006 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7007 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7008 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7009 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7010 case elfcpp::R_POWERPC_DTPREL16
:
7011 case elfcpp::R_POWERPC_DTPREL16_LO
:
7012 case elfcpp::R_POWERPC_DTPREL16_HI
:
7013 case elfcpp::R_POWERPC_DTPREL16_HA
:
7014 case elfcpp::R_PPC64_DTPREL16_DS
:
7015 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7016 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7017 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7018 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7019 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7020 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7021 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7022 case elfcpp::R_PPC64_TLSGD
:
7023 case elfcpp::R_PPC64_TLSLD
:
7024 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7027 case elfcpp::R_POWERPC_GOT16
:
7028 case elfcpp::R_POWERPC_GOT16_LO
:
7029 case elfcpp::R_POWERPC_GOT16_HI
:
7030 case elfcpp::R_POWERPC_GOT16_HA
:
7031 case elfcpp::R_PPC64_GOT16_DS
:
7032 case elfcpp::R_PPC64_GOT16_LO_DS
:
7034 // The symbol requires a GOT entry.
7035 Output_data_got_powerpc
<size
, big_endian
>* got
7036 = target
->got_section(symtab
, layout
);
7037 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7039 if (!parameters
->options().output_is_position_independent())
7042 && (size
== 32 || target
->abiversion() >= 2))
7043 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
7045 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
7047 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
7049 // If we are generating a shared object or a pie, this
7050 // symbol's GOT entry will be set by a dynamic relocation.
7052 off
= got
->add_constant(0);
7053 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
7055 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
7057 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7058 : elfcpp::R_POWERPC_RELATIVE
);
7059 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
7060 got
, off
, 0, false);
7065 case elfcpp::R_PPC64_TOC16
:
7066 case elfcpp::R_PPC64_TOC16_LO
:
7067 case elfcpp::R_PPC64_TOC16_HI
:
7068 case elfcpp::R_PPC64_TOC16_HA
:
7069 case elfcpp::R_PPC64_TOC16_DS
:
7070 case elfcpp::R_PPC64_TOC16_LO_DS
:
7071 // We need a GOT section.
7072 target
->got_section(symtab
, layout
);
7075 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7076 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7077 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7078 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7080 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
7081 if (tls_type
== tls::TLSOPT_NONE
)
7083 Output_data_got_powerpc
<size
, big_endian
>* got
7084 = target
->got_section(symtab
, layout
);
7085 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7086 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7087 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
7088 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
7090 else if (tls_type
== tls::TLSOPT_TO_LE
)
7092 // no GOT relocs needed for Local Exec.
7099 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7100 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7101 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7102 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7104 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7105 if (tls_type
== tls::TLSOPT_NONE
)
7106 target
->tlsld_got_offset(symtab
, layout
, object
);
7107 else if (tls_type
== tls::TLSOPT_TO_LE
)
7109 // no GOT relocs needed for Local Exec.
7110 if (parameters
->options().emit_relocs())
7112 Output_section
* os
= layout
->tls_segment()->first_section();
7113 gold_assert(os
!= NULL
);
7114 os
->set_needs_symtab_index();
7122 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7123 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7124 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7125 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7127 Output_data_got_powerpc
<size
, big_endian
>* got
7128 = target
->got_section(symtab
, layout
);
7129 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7130 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
7134 case elfcpp::R_POWERPC_GOT_TPREL16
:
7135 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7136 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7137 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7139 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
7140 if (tls_type
== tls::TLSOPT_NONE
)
7142 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7143 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
7145 Output_data_got_powerpc
<size
, big_endian
>* got
7146 = target
->got_section(symtab
, layout
);
7147 unsigned int off
= got
->add_constant(0);
7148 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
7150 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7151 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
7152 elfcpp::R_POWERPC_TPREL
,
7156 else if (tls_type
== tls::TLSOPT_TO_LE
)
7158 // no GOT relocs needed for Local Exec.
7166 unsupported_reloc_local(object
, r_type
);
7171 && parameters
->options().toc_optimize())
7173 if (data_shndx
== ppc_object
->toc_shndx())
7176 if (r_type
!= elfcpp::R_PPC64_ADDR64
7177 || (is_ifunc
&& target
->abiversion() < 2))
7179 else if (parameters
->options().output_is_position_independent())
7185 unsigned int shndx
= lsym
.get_st_shndx();
7186 if (shndx
>= elfcpp::SHN_LORESERVE
7187 && shndx
!= elfcpp::SHN_XINDEX
)
7192 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7195 enum {no_check
, check_lo
, check_ha
} insn_check
;
7199 insn_check
= no_check
;
7202 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7203 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7204 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7205 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7206 case elfcpp::R_POWERPC_GOT16_HA
:
7207 case elfcpp::R_PPC64_TOC16_HA
:
7208 insn_check
= check_ha
;
7211 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7212 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7213 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7214 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7215 case elfcpp::R_POWERPC_GOT16_LO
:
7216 case elfcpp::R_PPC64_GOT16_LO_DS
:
7217 case elfcpp::R_PPC64_TOC16_LO
:
7218 case elfcpp::R_PPC64_TOC16_LO_DS
:
7219 insn_check
= check_lo
;
7223 section_size_type slen
;
7224 const unsigned char* view
= NULL
;
7225 if (insn_check
!= no_check
)
7227 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7228 section_size_type off
=
7229 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7232 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7233 if (insn_check
== check_lo
7234 ? !ok_lo_toc_insn(insn
, r_type
)
7235 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7236 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7238 ppc_object
->set_no_toc_opt();
7239 gold_warning(_("%s: toc optimization is not supported "
7240 "for %#08x instruction"),
7241 ppc_object
->name().c_str(), insn
);
7250 case elfcpp::R_PPC64_TOC16
:
7251 case elfcpp::R_PPC64_TOC16_LO
:
7252 case elfcpp::R_PPC64_TOC16_HI
:
7253 case elfcpp::R_PPC64_TOC16_HA
:
7254 case elfcpp::R_PPC64_TOC16_DS
:
7255 case elfcpp::R_PPC64_TOC16_LO_DS
:
7256 unsigned int shndx
= lsym
.get_st_shndx();
7257 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7259 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7260 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
7262 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_addend();
7263 if (dst_off
< ppc_object
->section_size(shndx
))
7266 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7268 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7270 // Need to check that the insn is a ld
7272 view
= ppc_object
->section_contents(data_shndx
,
7275 section_size_type off
=
7276 (convert_to_section_size_type(reloc
.get_r_offset())
7277 + (big_endian
? -2 : 3));
7279 && (view
[off
] & (0x3f << 2)) == 58u << 2)
7283 ppc_object
->set_no_toc_opt(dst_off
);
7294 case elfcpp::R_POWERPC_REL32
:
7295 if (ppc_object
->got2_shndx() != 0
7296 && parameters
->options().output_is_position_independent())
7298 unsigned int shndx
= lsym
.get_st_shndx();
7299 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7301 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7302 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
7303 && (ppc_object
->section_flags(data_shndx
)
7304 & elfcpp::SHF_EXECINSTR
) != 0)
7305 gold_error(_("%s: unsupported -mbss-plt code"),
7306 ppc_object
->name().c_str());
7316 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7317 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7318 case elfcpp::R_POWERPC_GOT_TPREL16
:
7319 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7320 case elfcpp::R_POWERPC_GOT16
:
7321 case elfcpp::R_PPC64_GOT16_DS
:
7322 case elfcpp::R_PPC64_TOC16
:
7323 case elfcpp::R_PPC64_TOC16_DS
:
7324 ppc_object
->set_has_small_toc_reloc();
7330 // Report an unsupported relocation against a global symbol.
7332 template<int size
, bool big_endian
>
7334 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
7335 Sized_relobj_file
<size
, big_endian
>* object
,
7336 unsigned int r_type
,
7339 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
7340 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
7343 // Scan a relocation for a global symbol.
7345 template<int size
, bool big_endian
>
7347 Target_powerpc
<size
, big_endian
>::Scan::global(
7348 Symbol_table
* symtab
,
7350 Target_powerpc
<size
, big_endian
>* target
,
7351 Sized_relobj_file
<size
, big_endian
>* object
,
7352 unsigned int data_shndx
,
7353 Output_section
* output_section
,
7354 const elfcpp::Rela
<size
, big_endian
>& reloc
,
7355 unsigned int r_type
,
7358 if (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
)
7362 if (target
->replace_tls_get_addr(gsym
))
7363 // Change a __tls_get_addr reference to __tls_get_addr_opt
7364 // so dynamic relocs are emitted against the latter symbol.
7365 gsym
= target
->tls_get_addr_opt();
7367 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7368 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7370 this->expect_tls_get_addr_call();
7371 const bool final
= gsym
->final_value_is_known();
7372 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7373 if (tls_type
!= tls::TLSOPT_NONE
)
7374 this->skip_next_tls_get_addr_call();
7376 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7377 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7379 this->expect_tls_get_addr_call();
7380 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7381 if (tls_type
!= tls::TLSOPT_NONE
)
7382 this->skip_next_tls_get_addr_call();
7385 Powerpc_relobj
<size
, big_endian
>* ppc_object
7386 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7388 // A STT_GNU_IFUNC symbol may require a PLT entry.
7389 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
7390 bool pushed_ifunc
= false;
7391 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
7393 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7394 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7395 r_type
, r_sym
, reloc
.get_r_addend());
7396 target
->make_plt_entry(symtab
, layout
, gsym
);
7397 pushed_ifunc
= true;
7402 case elfcpp::R_POWERPC_NONE
:
7403 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7404 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7405 case elfcpp::R_PPC_LOCAL24PC
:
7406 case elfcpp::R_POWERPC_TLS
:
7407 case elfcpp::R_PPC64_ENTRY
:
7408 case elfcpp::R_POWERPC_PLTSEQ
:
7409 case elfcpp::R_POWERPC_PLTCALL
:
7412 case elfcpp::R_PPC64_TOC
:
7414 Output_data_got_powerpc
<size
, big_endian
>* got
7415 = target
->got_section(symtab
, layout
);
7416 if (parameters
->options().output_is_position_independent())
7418 Address off
= reloc
.get_r_offset();
7420 && data_shndx
== ppc_object
->opd_shndx()
7421 && ppc_object
->get_opd_discard(off
- 8))
7424 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7425 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
7426 if (data_shndx
!= ppc_object
->opd_shndx())
7427 symobj
= static_cast
7428 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7429 rela_dyn
->add_output_section_relative(got
->output_section(),
7430 elfcpp::R_POWERPC_RELATIVE
,
7432 object
, data_shndx
, off
,
7433 symobj
->toc_base_offset());
7438 case elfcpp::R_PPC64_ADDR64
:
7440 && target
->abiversion() < 2
7441 && data_shndx
== ppc_object
->opd_shndx()
7442 && (gsym
->is_defined_in_discarded_section()
7443 || gsym
->object() != object
))
7445 ppc_object
->set_opd_discard(reloc
.get_r_offset());
7449 case elfcpp::R_PPC64_UADDR64
:
7450 case elfcpp::R_POWERPC_ADDR32
:
7451 case elfcpp::R_POWERPC_UADDR32
:
7452 case elfcpp::R_POWERPC_ADDR24
:
7453 case elfcpp::R_POWERPC_ADDR16
:
7454 case elfcpp::R_POWERPC_ADDR16_LO
:
7455 case elfcpp::R_POWERPC_ADDR16_HI
:
7456 case elfcpp::R_POWERPC_ADDR16_HA
:
7457 case elfcpp::R_POWERPC_UADDR16
:
7458 case elfcpp::R_PPC64_ADDR16_HIGH
:
7459 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7460 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7461 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7462 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7463 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7464 case elfcpp::R_PPC64_ADDR16_DS
:
7465 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7466 case elfcpp::R_POWERPC_ADDR14
:
7467 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7468 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7470 // Make a PLT entry if necessary.
7471 if (gsym
->needs_plt_entry())
7473 // Since this is not a PC-relative relocation, we may be
7474 // taking the address of a function. In that case we need to
7475 // set the entry in the dynamic symbol table to the address of
7476 // the PLT call stub.
7477 bool need_ifunc_plt
= false;
7478 if ((size
== 32 || target
->abiversion() >= 2)
7479 && gsym
->is_from_dynobj()
7480 && !parameters
->options().output_is_position_independent())
7482 gsym
->set_needs_dynsym_value();
7483 need_ifunc_plt
= true;
7485 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
7487 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7488 target
->push_branch(ppc_object
, data_shndx
,
7489 reloc
.get_r_offset(), r_type
, r_sym
,
7490 reloc
.get_r_addend());
7491 target
->make_plt_entry(symtab
, layout
, gsym
);
7494 // Make a dynamic relocation if necessary.
7495 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
7496 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
7498 if (!parameters
->options().output_is_position_independent()
7499 && gsym
->may_need_copy_reloc())
7501 target
->copy_reloc(symtab
, layout
, object
,
7502 data_shndx
, output_section
, gsym
, reloc
);
7504 else if ((((size
== 32
7505 && r_type
== elfcpp::R_POWERPC_ADDR32
)
7507 && r_type
== elfcpp::R_PPC64_ADDR64
7508 && target
->abiversion() >= 2))
7509 && gsym
->can_use_relative_reloc(false)
7510 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
7511 && parameters
->options().shared()))
7513 && r_type
== elfcpp::R_PPC64_ADDR64
7514 && target
->abiversion() < 2
7515 && (gsym
->can_use_relative_reloc(false)
7516 || data_shndx
== ppc_object
->opd_shndx())))
7518 Reloc_section
* rela_dyn
7519 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7520 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7521 : elfcpp::R_POWERPC_RELATIVE
);
7522 rela_dyn
->add_symbolless_global_addend(
7523 gsym
, dynrel
, output_section
, object
, data_shndx
,
7524 reloc
.get_r_offset(), reloc
.get_r_addend());
7528 Reloc_section
* rela_dyn
7529 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7530 check_non_pic(object
, r_type
);
7531 rela_dyn
->add_global(gsym
, r_type
, output_section
,
7533 reloc
.get_r_offset(),
7534 reloc
.get_r_addend());
7537 && parameters
->options().toc_optimize()
7538 && data_shndx
== ppc_object
->toc_shndx())
7539 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7545 case elfcpp::R_POWERPC_PLT16_LO
:
7546 case elfcpp::R_POWERPC_PLT16_HI
:
7547 case elfcpp::R_POWERPC_PLT16_HA
:
7548 case elfcpp::R_PPC64_PLT16_LO_DS
:
7550 target
->make_plt_entry(symtab
, layout
, gsym
);
7553 case elfcpp::R_PPC_PLTREL24
:
7554 case elfcpp::R_POWERPC_REL24
:
7557 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7558 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7559 r_type
, r_sym
, reloc
.get_r_addend());
7560 if (gsym
->needs_plt_entry()
7561 || (!gsym
->final_value_is_known()
7562 && (gsym
->is_undefined()
7563 || gsym
->is_from_dynobj()
7564 || gsym
->is_preemptible())))
7565 target
->make_plt_entry(symtab
, layout
, gsym
);
7569 case elfcpp::R_PPC64_REL64
:
7570 case elfcpp::R_POWERPC_REL32
:
7571 // Make a dynamic relocation if necessary.
7572 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
7574 if (!parameters
->options().output_is_position_independent()
7575 && gsym
->may_need_copy_reloc())
7577 target
->copy_reloc(symtab
, layout
, object
,
7578 data_shndx
, output_section
, gsym
,
7583 Reloc_section
* rela_dyn
7584 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7585 check_non_pic(object
, r_type
);
7586 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
7587 data_shndx
, reloc
.get_r_offset(),
7588 reloc
.get_r_addend());
7593 case elfcpp::R_POWERPC_REL14
:
7594 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7595 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7598 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7599 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7600 r_type
, r_sym
, reloc
.get_r_addend());
7604 case elfcpp::R_PPC64_TOCSAVE
:
7605 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7606 // caller has already saved r2 and thus a plt call stub need not
7609 && target
->mark_pltcall(ppc_object
, data_shndx
,
7610 reloc
.get_r_offset() - 4, symtab
))
7612 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7614 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7616 object
->error(_("tocsave symbol %u has bad shndx %u"),
7620 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7621 target
->add_tocsave(ppc_object
, shndx
,
7622 sym
->value() + reloc
.get_r_addend());
7627 case elfcpp::R_POWERPC_REL16
:
7628 case elfcpp::R_POWERPC_REL16_LO
:
7629 case elfcpp::R_POWERPC_REL16_HI
:
7630 case elfcpp::R_POWERPC_REL16_HA
:
7631 case elfcpp::R_POWERPC_REL16DX_HA
:
7632 case elfcpp::R_PPC64_REL16_HIGH
:
7633 case elfcpp::R_PPC64_REL16_HIGHA
:
7634 case elfcpp::R_PPC64_REL16_HIGHER
:
7635 case elfcpp::R_PPC64_REL16_HIGHERA
:
7636 case elfcpp::R_PPC64_REL16_HIGHEST
:
7637 case elfcpp::R_PPC64_REL16_HIGHESTA
:
7638 case elfcpp::R_POWERPC_SECTOFF
:
7639 case elfcpp::R_POWERPC_SECTOFF_LO
:
7640 case elfcpp::R_POWERPC_SECTOFF_HI
:
7641 case elfcpp::R_POWERPC_SECTOFF_HA
:
7642 case elfcpp::R_PPC64_SECTOFF_DS
:
7643 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7644 case elfcpp::R_POWERPC_TPREL16
:
7645 case elfcpp::R_POWERPC_TPREL16_LO
:
7646 case elfcpp::R_POWERPC_TPREL16_HI
:
7647 case elfcpp::R_POWERPC_TPREL16_HA
:
7648 case elfcpp::R_PPC64_TPREL16_DS
:
7649 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7650 case elfcpp::R_PPC64_TPREL16_HIGH
:
7651 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7652 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7653 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7654 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7655 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7656 case elfcpp::R_POWERPC_DTPREL16
:
7657 case elfcpp::R_POWERPC_DTPREL16_LO
:
7658 case elfcpp::R_POWERPC_DTPREL16_HI
:
7659 case elfcpp::R_POWERPC_DTPREL16_HA
:
7660 case elfcpp::R_PPC64_DTPREL16_DS
:
7661 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7662 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7663 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7664 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7665 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7666 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7667 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7668 case elfcpp::R_PPC64_TLSGD
:
7669 case elfcpp::R_PPC64_TLSLD
:
7670 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7673 case elfcpp::R_POWERPC_GOT16
:
7674 case elfcpp::R_POWERPC_GOT16_LO
:
7675 case elfcpp::R_POWERPC_GOT16_HI
:
7676 case elfcpp::R_POWERPC_GOT16_HA
:
7677 case elfcpp::R_PPC64_GOT16_DS
:
7678 case elfcpp::R_PPC64_GOT16_LO_DS
:
7680 // The symbol requires a GOT entry.
7681 Output_data_got_powerpc
<size
, big_endian
>* got
;
7683 got
= target
->got_section(symtab
, layout
);
7684 if (gsym
->final_value_is_known())
7687 && (size
== 32 || target
->abiversion() >= 2))
7688 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7690 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7692 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7694 // If we are generating a shared object or a pie, this
7695 // symbol's GOT entry will be set by a dynamic relocation.
7696 unsigned int off
= got
->add_constant(0);
7697 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7699 Reloc_section
* rela_dyn
7700 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7702 if (gsym
->can_use_relative_reloc(false)
7704 || target
->abiversion() >= 2)
7705 && gsym
->visibility() == elfcpp::STV_PROTECTED
7706 && parameters
->options().shared()))
7708 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7709 : elfcpp::R_POWERPC_RELATIVE
);
7710 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7714 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7715 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7721 case elfcpp::R_PPC64_TOC16
:
7722 case elfcpp::R_PPC64_TOC16_LO
:
7723 case elfcpp::R_PPC64_TOC16_HI
:
7724 case elfcpp::R_PPC64_TOC16_HA
:
7725 case elfcpp::R_PPC64_TOC16_DS
:
7726 case elfcpp::R_PPC64_TOC16_LO_DS
:
7727 // We need a GOT section.
7728 target
->got_section(symtab
, layout
);
7731 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7732 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7733 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7734 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7736 const bool final
= gsym
->final_value_is_known();
7737 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7738 if (tls_type
== tls::TLSOPT_NONE
)
7740 Output_data_got_powerpc
<size
, big_endian
>* got
7741 = target
->got_section(symtab
, layout
);
7742 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7743 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7744 elfcpp::R_POWERPC_DTPMOD
,
7745 elfcpp::R_POWERPC_DTPREL
);
7747 else if (tls_type
== tls::TLSOPT_TO_IE
)
7749 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7751 Output_data_got_powerpc
<size
, big_endian
>* got
7752 = target
->got_section(symtab
, layout
);
7753 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7754 if (gsym
->is_undefined()
7755 || gsym
->is_from_dynobj())
7757 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7758 elfcpp::R_POWERPC_TPREL
);
7762 unsigned int off
= got
->add_constant(0);
7763 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7764 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7765 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7770 else if (tls_type
== tls::TLSOPT_TO_LE
)
7772 // no GOT relocs needed for Local Exec.
7779 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7780 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7781 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7782 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7784 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7785 if (tls_type
== tls::TLSOPT_NONE
)
7786 target
->tlsld_got_offset(symtab
, layout
, object
);
7787 else if (tls_type
== tls::TLSOPT_TO_LE
)
7789 // no GOT relocs needed for Local Exec.
7790 if (parameters
->options().emit_relocs())
7792 Output_section
* os
= layout
->tls_segment()->first_section();
7793 gold_assert(os
!= NULL
);
7794 os
->set_needs_symtab_index();
7802 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7803 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7804 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7805 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7807 Output_data_got_powerpc
<size
, big_endian
>* got
7808 = target
->got_section(symtab
, layout
);
7809 if (!gsym
->final_value_is_known()
7810 && (gsym
->is_from_dynobj()
7811 || gsym
->is_undefined()
7812 || gsym
->is_preemptible()))
7813 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7814 target
->rela_dyn_section(layout
),
7815 elfcpp::R_POWERPC_DTPREL
);
7817 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7821 case elfcpp::R_POWERPC_GOT_TPREL16
:
7822 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7823 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7824 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7826 const bool final
= gsym
->final_value_is_known();
7827 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7828 if (tls_type
== tls::TLSOPT_NONE
)
7830 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7832 Output_data_got_powerpc
<size
, big_endian
>* got
7833 = target
->got_section(symtab
, layout
);
7834 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7835 if (gsym
->is_undefined()
7836 || gsym
->is_from_dynobj())
7838 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7839 elfcpp::R_POWERPC_TPREL
);
7843 unsigned int off
= got
->add_constant(0);
7844 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7845 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7846 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7851 else if (tls_type
== tls::TLSOPT_TO_LE
)
7853 // no GOT relocs needed for Local Exec.
7861 unsupported_reloc_global(object
, r_type
, gsym
);
7866 && parameters
->options().toc_optimize())
7868 if (data_shndx
== ppc_object
->toc_shndx())
7871 if (r_type
!= elfcpp::R_PPC64_ADDR64
7872 || (is_ifunc
&& target
->abiversion() < 2))
7874 else if (parameters
->options().output_is_position_independent()
7875 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7878 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7881 enum {no_check
, check_lo
, check_ha
} insn_check
;
7885 insn_check
= no_check
;
7888 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7889 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7890 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7891 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7892 case elfcpp::R_POWERPC_GOT16_HA
:
7893 case elfcpp::R_PPC64_TOC16_HA
:
7894 insn_check
= check_ha
;
7897 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7898 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7899 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7900 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7901 case elfcpp::R_POWERPC_GOT16_LO
:
7902 case elfcpp::R_PPC64_GOT16_LO_DS
:
7903 case elfcpp::R_PPC64_TOC16_LO
:
7904 case elfcpp::R_PPC64_TOC16_LO_DS
:
7905 insn_check
= check_lo
;
7909 section_size_type slen
;
7910 const unsigned char* view
= NULL
;
7911 if (insn_check
!= no_check
)
7913 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7914 section_size_type off
=
7915 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7918 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7919 if (insn_check
== check_lo
7920 ? !ok_lo_toc_insn(insn
, r_type
)
7921 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7922 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7924 ppc_object
->set_no_toc_opt();
7925 gold_warning(_("%s: toc optimization is not supported "
7926 "for %#08x instruction"),
7927 ppc_object
->name().c_str(), insn
);
7936 case elfcpp::R_PPC64_TOC16
:
7937 case elfcpp::R_PPC64_TOC16_LO
:
7938 case elfcpp::R_PPC64_TOC16_HI
:
7939 case elfcpp::R_PPC64_TOC16_HA
:
7940 case elfcpp::R_PPC64_TOC16_DS
:
7941 case elfcpp::R_PPC64_TOC16_LO_DS
:
7942 if (gsym
->source() == Symbol::FROM_OBJECT
7943 && !gsym
->object()->is_dynamic())
7945 Powerpc_relobj
<size
, big_endian
>* sym_object
7946 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7948 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7949 if (shndx
== sym_object
->toc_shndx())
7951 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7952 Address dst_off
= sym
->value() + reloc
.get_r_addend();
7953 if (dst_off
< sym_object
->section_size(shndx
))
7956 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7958 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7960 // Need to check that the insn is a ld
7962 view
= ppc_object
->section_contents(data_shndx
,
7965 section_size_type off
=
7966 (convert_to_section_size_type(reloc
.get_r_offset())
7967 + (big_endian
? -2 : 3));
7969 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7973 sym_object
->set_no_toc_opt(dst_off
);
7985 case elfcpp::R_PPC_LOCAL24PC
:
7986 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7987 gold_error(_("%s: unsupported -mbss-plt code"),
7988 ppc_object
->name().c_str());
7997 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7998 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7999 case elfcpp::R_POWERPC_GOT_TPREL16
:
8000 case elfcpp::R_POWERPC_GOT_DTPREL16
:
8001 case elfcpp::R_POWERPC_GOT16
:
8002 case elfcpp::R_PPC64_GOT16_DS
:
8003 case elfcpp::R_PPC64_TOC16
:
8004 case elfcpp::R_PPC64_TOC16_DS
:
8005 ppc_object
->set_has_small_toc_reloc();
8011 // Process relocations for gc.
8013 template<int size
, bool big_endian
>
8015 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
8016 Symbol_table
* symtab
,
8018 Sized_relobj_file
<size
, big_endian
>* object
,
8019 unsigned int data_shndx
,
8021 const unsigned char* prelocs
,
8023 Output_section
* output_section
,
8024 bool needs_special_offset_handling
,
8025 size_t local_symbol_count
,
8026 const unsigned char* plocal_symbols
)
8028 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8029 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8032 Powerpc_relobj
<size
, big_endian
>* ppc_object
8033 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
8035 ppc_object
->set_opd_valid();
8036 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
8038 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
8039 for (p
= ppc_object
->access_from_map()->begin();
8040 p
!= ppc_object
->access_from_map()->end();
8043 Address dst_off
= p
->first
;
8044 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
8045 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
8046 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
8048 Relobj
* src_obj
= s
->first
;
8049 unsigned int src_indx
= s
->second
;
8050 symtab
->gc()->add_reference(src_obj
, src_indx
,
8051 ppc_object
, dst_indx
);
8055 ppc_object
->access_from_map()->clear();
8056 ppc_object
->process_gc_mark(symtab
);
8057 // Don't look at .opd relocs as .opd will reference everything.
8061 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
8070 needs_special_offset_handling
,
8075 // Handle target specific gc actions when adding a gc reference from
8076 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
8077 // and DST_OFF. For powerpc64, this adds a referenc to the code
8078 // section of a function descriptor.
8080 template<int size
, bool big_endian
>
8082 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
8083 Symbol_table
* symtab
,
8085 unsigned int src_shndx
,
8087 unsigned int dst_shndx
,
8088 Address dst_off
) const
8090 if (size
!= 64 || dst_obj
->is_dynamic())
8093 Powerpc_relobj
<size
, big_endian
>* ppc_object
8094 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
8095 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
8097 if (ppc_object
->opd_valid())
8099 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
8100 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
8104 // If we haven't run scan_opd_relocs, we must delay
8105 // processing this function descriptor reference.
8106 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
8111 // Add any special sections for this symbol to the gc work list.
8112 // For powerpc64, this adds the code section of a function
8115 template<int size
, bool big_endian
>
8117 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
8118 Symbol_table
* symtab
,
8123 Powerpc_relobj
<size
, big_endian
>* ppc_object
8124 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
8126 unsigned int shndx
= sym
->shndx(&is_ordinary
);
8127 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
8129 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
8130 Address dst_off
= gsym
->value();
8131 if (ppc_object
->opd_valid())
8133 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
8134 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
8138 ppc_object
->add_gc_mark(dst_off
);
8143 // For a symbol location in .opd, set LOC to the location of the
8146 template<int size
, bool big_endian
>
8148 Target_powerpc
<size
, big_endian
>::do_function_location(
8149 Symbol_location
* loc
) const
8151 if (size
== 64 && loc
->shndx
!= 0)
8153 if (loc
->object
->is_dynamic())
8155 Powerpc_dynobj
<size
, big_endian
>* ppc_object
8156 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
8157 if (loc
->shndx
== ppc_object
->opd_shndx())
8160 Address off
= loc
->offset
- ppc_object
->opd_address();
8161 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
8162 loc
->offset
= dest_off
;
8167 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8168 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
8169 if (loc
->shndx
== ppc_object
->opd_shndx())
8172 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
8173 loc
->offset
= dest_off
;
8179 // FNOFFSET in section SHNDX in OBJECT is the start of a function
8180 // compiled with -fsplit-stack. The function calls non-split-stack
8181 // code. Change the function to ensure it has enough stack space to
8182 // call some random function.
8184 template<int size
, bool big_endian
>
8186 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
8189 section_offset_type fnoffset
,
8190 section_size_type fnsize
,
8191 const unsigned char* prelocs
,
8193 unsigned char* view
,
8194 section_size_type view_size
,
8196 std::string
* to
) const
8198 // 32-bit not supported.
8202 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
8203 prelocs
, reloc_count
, view
, view_size
,
8208 // The function always starts with
8209 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
8210 // addis %r12,%r1,-allocate@ha
8211 // addi %r12,%r12,-allocate@l
8213 // but note that the addis or addi may be replaced with a nop
8215 unsigned char *entry
= view
+ fnoffset
;
8216 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
8218 if ((insn
& 0xffff0000) == addis_2_12
)
8220 /* Skip ELFv2 global entry code. */
8222 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
8225 unsigned char *pinsn
= entry
;
8227 const uint32_t ld_private_ss
= 0xe80d8fc0;
8228 if (insn
== ld_private_ss
)
8230 int32_t allocate
= 0;
8234 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
8235 if ((insn
& 0xffff0000) == addis_12_1
)
8236 allocate
+= (insn
& 0xffff) << 16;
8237 else if ((insn
& 0xffff0000) == addi_12_1
8238 || (insn
& 0xffff0000) == addi_12_12
)
8239 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
8240 else if (insn
!= nop
)
8243 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
8245 int extra
= parameters
->options().split_stack_adjust_size();
8247 if (allocate
>= 0 || extra
< 0)
8249 object
->error(_("split-stack stack size overflow at "
8250 "section %u offset %0zx"),
8251 shndx
, static_cast<size_t>(fnoffset
));
8255 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
8256 if (insn
!= addis_12_1
)
8258 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
8260 insn
= addi_12_12
| (allocate
& 0xffff);
8261 if (insn
!= addi_12_12
)
8263 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
8269 insn
= addi_12_1
| (allocate
& 0xffff);
8270 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
8273 if (pinsn
!= entry
+ 12)
8274 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
8282 if (!object
->has_no_split_stack())
8283 object
->error(_("failed to match split-stack sequence at "
8284 "section %u offset %0zx"),
8285 shndx
, static_cast<size_t>(fnoffset
));
8289 // Scan relocations for a section.
8291 template<int size
, bool big_endian
>
8293 Target_powerpc
<size
, big_endian
>::scan_relocs(
8294 Symbol_table
* symtab
,
8296 Sized_relobj_file
<size
, big_endian
>* object
,
8297 unsigned int data_shndx
,
8298 unsigned int sh_type
,
8299 const unsigned char* prelocs
,
8301 Output_section
* output_section
,
8302 bool needs_special_offset_handling
,
8303 size_t local_symbol_count
,
8304 const unsigned char* plocal_symbols
)
8306 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8307 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8310 if (!this->plt_localentry0_init_
)
8312 bool plt_localentry0
= false;
8314 && this->abiversion() >= 2)
8316 if (parameters
->options().user_set_plt_localentry())
8317 plt_localentry0
= parameters
->options().plt_localentry();
8319 && symtab
->lookup("GLIBC_2.26", NULL
) == NULL
)
8320 gold_warning(_("--plt-localentry is especially dangerous without "
8321 "ld.so support to detect ABI violations"));
8323 this->plt_localentry0_
= plt_localentry0
;
8324 this->plt_localentry0_init_
= true;
8327 if (sh_type
== elfcpp::SHT_REL
)
8329 gold_error(_("%s: unsupported REL reloc section"),
8330 object
->name().c_str());
8334 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
8343 needs_special_offset_handling
,
8348 // Functor class for processing the global symbol table.
8349 // Removes symbols defined on discarded opd entries.
8351 template<bool big_endian
>
8352 class Global_symbol_visitor_opd
8355 Global_symbol_visitor_opd()
8359 operator()(Sized_symbol
<64>* sym
)
8361 if (sym
->has_symtab_index()
8362 || sym
->source() != Symbol::FROM_OBJECT
8363 || !sym
->in_real_elf())
8366 if (sym
->object()->is_dynamic())
8369 Powerpc_relobj
<64, big_endian
>* symobj
8370 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
8371 if (symobj
->opd_shndx() == 0)
8375 unsigned int shndx
= sym
->shndx(&is_ordinary
);
8376 if (shndx
== symobj
->opd_shndx()
8377 && symobj
->get_opd_discard(sym
->value()))
8379 sym
->set_undefined();
8380 sym
->set_visibility(elfcpp::STV_DEFAULT
);
8381 sym
->set_is_defined_in_discarded_section();
8382 sym
->set_symtab_index(-1U);
8387 template<int size
, bool big_endian
>
8389 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
8391 Symbol_table
* symtab
)
8395 Output_data_save_res
<size
, big_endian
>* savres
8396 = new Output_data_save_res
<size
, big_endian
>(symtab
);
8397 this->savres_section_
= savres
;
8398 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8399 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
8400 savres
, ORDER_TEXT
, false);
8404 // Sort linker created .got section first (for the header), then input
8405 // sections belonging to files using small model code.
8407 template<bool big_endian
>
8408 class Sort_toc_sections
8412 operator()(const Output_section::Input_section
& is1
,
8413 const Output_section::Input_section
& is2
) const
8415 if (!is1
.is_input_section() && is2
.is_input_section())
8418 = (is1
.is_input_section()
8419 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
8420 ->has_small_toc_reloc()));
8422 = (is2
.is_input_section()
8423 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
8424 ->has_small_toc_reloc()));
8425 return small1
&& !small2
;
8429 // Finalize the sections.
8431 template<int size
, bool big_endian
>
8433 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
8435 const Input_objects
* input_objects
,
8436 Symbol_table
* symtab
)
8438 if (parameters
->doing_static_link())
8440 // At least some versions of glibc elf-init.o have a strong
8441 // reference to __rela_iplt marker syms. A weak ref would be
8443 if (this->iplt_
!= NULL
)
8445 Reloc_section
* rel
= this->iplt_
->rel_plt();
8446 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
8447 Symbol_table::PREDEFINED
, rel
, 0, 0,
8448 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8449 elfcpp::STV_HIDDEN
, 0, false, true);
8450 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
8451 Symbol_table::PREDEFINED
, rel
, 0, 0,
8452 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8453 elfcpp::STV_HIDDEN
, 0, true, true);
8457 symtab
->define_as_constant("__rela_iplt_start", NULL
,
8458 Symbol_table::PREDEFINED
, 0, 0,
8459 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8460 elfcpp::STV_HIDDEN
, 0, true, false);
8461 symtab
->define_as_constant("__rela_iplt_end", NULL
,
8462 Symbol_table::PREDEFINED
, 0, 0,
8463 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8464 elfcpp::STV_HIDDEN
, 0, true, false);
8470 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
8471 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
8473 if (!parameters
->options().relocatable())
8475 this->define_save_restore_funcs(layout
, symtab
);
8477 // Annoyingly, we need to make these sections now whether or
8478 // not we need them. If we delay until do_relax then we
8479 // need to mess with the relaxation machinery checkpointing.
8480 this->got_section(symtab
, layout
);
8481 this->make_brlt_section(layout
);
8483 if (parameters
->options().toc_sort())
8485 Output_section
* os
= this->got_
->output_section();
8486 if (os
!= NULL
&& os
->input_sections().size() > 1)
8487 std::stable_sort(os
->input_sections().begin(),
8488 os
->input_sections().end(),
8489 Sort_toc_sections
<big_endian
>());
8494 // Fill in some more dynamic tags.
8495 Output_data_dynamic
* odyn
= layout
->dynamic_data();
8498 const Reloc_section
* rel_plt
= (this->plt_
== NULL
8500 : this->plt_
->rel_plt());
8501 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
8502 this->rela_dyn_
, true, size
== 32);
8506 if (this->got_
!= NULL
)
8508 this->got_
->finalize_data_size();
8509 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
8510 this->got_
, this->got_
->g_o_t());
8512 if (this->has_tls_get_addr_opt_
)
8513 odyn
->add_constant(elfcpp::DT_PPC_OPT
, elfcpp::PPC_OPT_TLS
);
8517 if (this->glink_
!= NULL
)
8519 this->glink_
->finalize_data_size();
8520 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
8522 (this->glink_
->pltresolve_size()
8525 if (this->has_localentry0_
|| this->has_tls_get_addr_opt_
)
8526 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
8527 ((this->has_localentry0_
8528 ? elfcpp::PPC64_OPT_LOCALENTRY
: 0)
8529 | (this->has_tls_get_addr_opt_
8530 ? elfcpp::PPC64_OPT_TLS
: 0)));
8534 // Emit any relocs we saved in an attempt to avoid generating COPY
8536 if (this->copy_relocs_
.any_saved_relocs())
8537 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
8539 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
8540 p
!= input_objects
->relobj_end();
8543 Powerpc_relobj
<size
, big_endian
>* ppc_relobj
8544 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(*p
);
8545 if (ppc_relobj
->attributes_section_data())
8546 this->merge_object_attributes(ppc_relobj
->name().c_str(),
8547 ppc_relobj
->attributes_section_data());
8549 for (Input_objects::Dynobj_iterator p
= input_objects
->dynobj_begin();
8550 p
!= input_objects
->dynobj_end();
8553 Powerpc_dynobj
<size
, big_endian
>* ppc_dynobj
8554 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(*p
);
8555 if (ppc_dynobj
->attributes_section_data())
8556 this->merge_object_attributes(ppc_dynobj
->name().c_str(),
8557 ppc_dynobj
->attributes_section_data());
8560 // Create a .gnu.attributes section if we have merged any attributes
8562 if (this->attributes_section_data_
!= NULL
8563 && this->attributes_section_data_
->size() != 0)
8565 Output_attributes_section_data
* attributes_section
8566 = new Output_attributes_section_data(*this->attributes_section_data_
);
8567 layout
->add_output_section_data(".gnu.attributes",
8568 elfcpp::SHT_GNU_ATTRIBUTES
, 0,
8569 attributes_section
, ORDER_INVALID
, false);
8573 // Merge object attributes from input file called NAME with those of the
8574 // output. The input object attributes are in the object pointed by PASD.
8576 template<int size
, bool big_endian
>
8578 Target_powerpc
<size
, big_endian
>::merge_object_attributes(
8580 const Attributes_section_data
* pasd
)
8582 // Return if there is no attributes section data.
8586 // Create output object attributes.
8587 if (this->attributes_section_data_
== NULL
)
8588 this->attributes_section_data_
= new Attributes_section_data(NULL
, 0);
8590 const int vendor
= Object_attribute::OBJ_ATTR_GNU
;
8591 const Object_attribute
* in_attr
= pasd
->known_attributes(vendor
);
8592 Object_attribute
* out_attr
8593 = this->attributes_section_data_
->known_attributes(vendor
);
8598 int tag
= elfcpp::Tag_GNU_Power_ABI_FP
;
8599 int in_fp
= in_attr
[tag
].int_value() & 0xf;
8600 int out_fp
= out_attr
[tag
].int_value() & 0xf;
8601 if (in_fp
!= out_fp
)
8604 if ((in_fp
& 3) == 0)
8606 else if ((out_fp
& 3) == 0)
8608 out_fp
|= in_fp
& 3;
8609 out_attr
[tag
].set_int_value(out_fp
);
8610 out_attr
[tag
].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL
);
8611 this->last_fp_
= name
;
8613 else if ((out_fp
& 3) != 2 && (in_fp
& 3) == 2)
8615 err
= N_("%s uses hard float, %s uses soft float");
8616 first
= this->last_fp_
;
8619 else if ((out_fp
& 3) == 2 && (in_fp
& 3) != 2)
8621 err
= N_("%s uses hard float, %s uses soft float");
8623 second
= this->last_fp_
;
8625 else if ((out_fp
& 3) == 1 && (in_fp
& 3) == 3)
8627 err
= N_("%s uses double-precision hard float, "
8628 "%s uses single-precision hard float");
8629 first
= this->last_fp_
;
8632 else if ((out_fp
& 3) == 3 && (in_fp
& 3) == 1)
8634 err
= N_("%s uses double-precision hard float, "
8635 "%s uses single-precision hard float");
8637 second
= this->last_fp_
;
8640 if (err
|| (in_fp
& 0xc) == 0)
8642 else if ((out_fp
& 0xc) == 0)
8644 out_fp
|= in_fp
& 0xc;
8645 out_attr
[tag
].set_int_value(out_fp
);
8646 out_attr
[tag
].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL
);
8647 this->last_ld_
= name
;
8649 else if ((out_fp
& 0xc) != 2 * 4 && (in_fp
& 0xc) == 2 * 4)
8651 err
= N_("%s uses 64-bit long double, %s uses 128-bit long double");
8653 second
= this->last_ld_
;
8655 else if ((in_fp
& 0xc) != 2 * 4 && (out_fp
& 0xc) == 2 * 4)
8657 err
= N_("%s uses 64-bit long double, %s uses 128-bit long double");
8658 first
= this->last_ld_
;
8661 else if ((out_fp
& 0xc) == 1 * 4 && (in_fp
& 0xc) == 3 * 4)
8663 err
= N_("%s uses IBM long double, %s uses IEEE long double");
8664 first
= this->last_ld_
;
8667 else if ((out_fp
& 0xc) == 3 * 4 && (in_fp
& 0xc) == 1 * 4)
8669 err
= N_("%s uses IBM long double, %s uses IEEE long double");
8671 second
= this->last_ld_
;
8676 if (parameters
->options().warn_mismatch())
8677 gold_error(_(err
), first
, second
);
8678 // Arrange for this attribute to be deleted. It's better to
8679 // say "don't know" about a file than to wrongly claim compliance.
8680 out_attr
[tag
].set_type(0);
8686 tag
= elfcpp::Tag_GNU_Power_ABI_Vector
;
8687 int in_vec
= in_attr
[tag
].int_value() & 3;
8688 int out_vec
= out_attr
[tag
].int_value() & 3;
8689 if (in_vec
!= out_vec
)
8694 else if (out_vec
== 0)
8697 out_attr
[tag
].set_int_value(out_vec
);
8698 out_attr
[tag
].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL
);
8699 this->last_vec_
= name
;
8701 // For now, allow generic to transition to AltiVec or SPE
8702 // without a warning. If GCC marked files with their stack
8703 // alignment and used don't-care markings for files which are
8704 // not affected by the vector ABI, we could warn about this
8706 else if (in_vec
== 1)
8708 else if (out_vec
== 1)
8711 out_attr
[tag
].set_int_value(out_vec
);
8712 out_attr
[tag
].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL
);
8713 this->last_vec_
= name
;
8715 else if (out_vec
< in_vec
)
8717 err
= N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI");
8718 first
= this->last_vec_
;
8721 else if (out_vec
> in_vec
)
8723 err
= N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI");
8725 second
= this->last_vec_
;
8729 if (parameters
->options().warn_mismatch())
8730 gold_error(_(err
), first
, second
);
8731 out_attr
[tag
].set_type(0);
8735 tag
= elfcpp::Tag_GNU_Power_ABI_Struct_Return
;
8736 int in_struct
= in_attr
[tag
].int_value() & 3;
8737 int out_struct
= out_attr
[tag
].int_value() & 3;
8738 if (in_struct
!= out_struct
)
8741 if (in_struct
== 0 || in_struct
== 3)
8743 else if (out_struct
== 0)
8745 out_struct
= in_struct
;
8746 out_attr
[tag
].set_int_value(out_struct
);
8747 out_attr
[tag
].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL
);
8748 this->last_struct_
= name
;
8750 else if (out_struct
< in_struct
)
8752 err
= N_("%s uses r3/r4 for small structure returns, "
8754 first
= this->last_struct_
;
8757 else if (out_struct
> in_struct
)
8759 err
= N_("%s uses r3/r4 for small structure returns, "
8762 second
= this->last_struct_
;
8766 if (parameters
->options().warn_mismatch())
8767 gold_error(_(err
), first
, second
);
8768 out_attr
[tag
].set_type(0);
8773 // Merge Tag_compatibility attributes and any common GNU ones.
8774 this->attributes_section_data_
->merge(name
, pasd
);
8777 // Emit any saved relocs, and mark toc entries using any of these
8778 // relocs as not optimizable.
8780 template<int sh_type
, int size
, bool big_endian
>
8782 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
8783 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
8786 && parameters
->options().toc_optimize())
8788 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8789 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8790 p
!= this->entries_
.end();
8793 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
8796 // If the symbol is no longer defined in a dynamic object,
8797 // then we emitted a COPY relocation. If it is still
8798 // dynamic then we'll need dynamic relocations and thus
8799 // can't optimize toc entries.
8800 if (entry
.sym_
->is_from_dynobj())
8802 Powerpc_relobj
<size
, big_endian
>* ppc_object
8803 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
8804 if (entry
.shndx_
== ppc_object
->toc_shndx())
8805 ppc_object
->set_no_toc_opt(entry
.address_
);
8810 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
8813 // Return the value to use for a branch relocation.
8815 template<int size
, bool big_endian
>
8817 Target_powerpc
<size
, big_endian
>::symval_for_branch(
8818 const Symbol_table
* symtab
,
8819 const Sized_symbol
<size
>* gsym
,
8820 Powerpc_relobj
<size
, big_endian
>* object
,
8822 unsigned int *dest_shndx
)
8824 if (size
== 32 || this->abiversion() >= 2)
8828 // If the symbol is defined in an opd section, ie. is a function
8829 // descriptor, use the function descriptor code entry address
8830 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
8832 && (gsym
->source() != Symbol::FROM_OBJECT
8833 || gsym
->object()->is_dynamic()))
8836 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
8837 unsigned int shndx
= symobj
->opd_shndx();
8840 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
8841 if (opd_addr
== invalid_address
)
8843 opd_addr
+= symobj
->output_section_address(shndx
);
8844 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
8847 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
8848 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
8851 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
8852 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
8853 *dest_shndx
= folded
.second
;
8855 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
8856 if (sec_addr
== invalid_address
)
8859 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
8860 *value
= sec_addr
+ sec_off
;
8865 // Perform a relocation.
8867 template<int size
, bool big_endian
>
8869 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
8870 const Relocate_info
<size
, big_endian
>* relinfo
,
8872 Target_powerpc
* target
,
8875 const unsigned char* preloc
,
8876 const Sized_symbol
<size
>* gsym
,
8877 const Symbol_value
<size
>* psymval
,
8878 unsigned char* view
,
8880 section_size_type view_size
)
8882 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8883 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8884 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8889 if (target
->replace_tls_get_addr(gsym
))
8890 gsym
= static_cast<const Sized_symbol
<size
>*>(target
->tls_get_addr_opt());
8892 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
8893 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
8894 switch (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
))
8896 case Track_tls::NOT_EXPECTED
:
8897 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8898 _("__tls_get_addr call lacks marker reloc"));
8900 case Track_tls::EXPECTED
:
8901 // We have already complained.
8903 case Track_tls::SKIP
:
8904 if (is_plt16_reloc
<size
>(r_type
)
8905 || r_type
== elfcpp::R_POWERPC_PLTSEQ
)
8907 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8908 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8910 else if (size
== 64 && r_type
== elfcpp::R_POWERPC_PLTCALL
)
8912 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8913 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, nop
);
8916 case Track_tls::NORMAL
:
8920 // Offset from start of insn to d-field reloc.
8921 const int d_offset
= big_endian
? 2 : 0;
8923 Powerpc_relobj
<size
, big_endian
>* const object
8924 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8926 bool has_stub_value
= false;
8927 bool localentry0
= false;
8928 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8931 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8932 : object
->local_has_plt_offset(r_sym
));
8934 && !is_plt16_reloc
<size
>(r_type
)
8935 && r_type
!= elfcpp::R_POWERPC_PLTSEQ
8936 && r_type
!= elfcpp::R_POWERPC_PLTCALL
8937 && (!psymval
->is_ifunc_symbol()
8938 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8942 && target
->abiversion() >= 2
8943 && !parameters
->options().output_is_position_independent()
8944 && !is_branch_reloc(r_type
))
8946 Address off
= target
->glink_section()->find_global_entry(gsym
);
8947 if (off
!= invalid_address
)
8949 value
= target
->glink_section()->global_entry_address() + off
;
8950 has_stub_value
= true;
8955 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
8956 if (target
->stub_tables().size() == 1)
8957 stub_table
= target
->stub_tables()[0];
8958 if (stub_table
== NULL
8961 && !parameters
->options().output_is_position_independent()
8962 && !is_branch_reloc(r_type
)))
8963 stub_table
= object
->stub_table(relinfo
->data_shndx
);
8964 if (stub_table
== NULL
)
8966 // This is a ref from a data section to an ifunc symbol,
8967 // or a non-branch reloc for which we always want to use
8968 // one set of stubs for resolving function addresses.
8969 if (target
->stub_tables().size() != 0)
8970 stub_table
= target
->stub_tables()[0];
8972 if (stub_table
!= NULL
)
8974 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8976 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8977 rela
.get_r_addend());
8979 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8980 rela
.get_r_addend());
8983 value
= stub_table
->stub_address() + ent
->off_
;
8984 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8985 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8986 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8989 && relnum
+ 1 < reloc_count
)
8991 Reltype
next_rela(preloc
+ reloc_size
);
8992 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8993 == elfcpp::R_PPC64_TOCSAVE
8994 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8997 localentry0
= ent
->localentry0_
;
8998 has_stub_value
= true;
9002 // We don't care too much about bogus debug references to
9003 // non-local functions, but otherwise there had better be a plt
9004 // call stub or global entry stub as appropriate.
9005 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
9008 if (has_plt_offset
&& is_plt16_reloc
<size
>(r_type
))
9010 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
9012 value
= target
->plt_off(gsym
, &plt
);
9014 value
= target
->plt_off(object
, r_sym
, &plt
);
9015 value
+= plt
->address();
9018 value
-= (target
->got_section()->output_section()->address()
9019 + object
->toc_base_offset());
9020 else if (parameters
->options().output_is_position_independent())
9022 if (rela
.get_r_addend() >= 32768)
9024 unsigned int got2
= object
->got2_shndx();
9025 value
-= (object
->get_output_section_offset(got2
)
9026 + object
->output_section(got2
)->address()
9027 + rela
.get_r_addend());
9030 value
-= (target
->got_section()->address()
9031 + target
->got_section()->g_o_t());
9034 else if (!has_plt_offset
9035 && (is_plt16_reloc
<size
>(r_type
)
9036 || r_type
== elfcpp::R_POWERPC_PLTSEQ
))
9038 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9039 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9040 r_type
= elfcpp::R_POWERPC_NONE
;
9042 else if (r_type
== elfcpp::R_POWERPC_GOT16
9043 || r_type
== elfcpp::R_POWERPC_GOT16_LO
9044 || r_type
== elfcpp::R_POWERPC_GOT16_HI
9045 || r_type
== elfcpp::R_POWERPC_GOT16_HA
9046 || r_type
== elfcpp::R_PPC64_GOT16_DS
9047 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
9051 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
9052 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
9056 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
9057 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
9059 value
-= target
->got_section()->got_base_offset(object
);
9061 else if (r_type
== elfcpp::R_PPC64_TOC
)
9063 value
= (target
->got_section()->output_section()->address()
9064 + object
->toc_base_offset());
9066 else if (gsym
!= NULL
9067 && (r_type
== elfcpp::R_POWERPC_REL24
9068 || r_type
== elfcpp::R_PPC_PLTREL24
)
9073 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
9074 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
9075 bool can_plt_call
= localentry0
|| target
->is_tls_get_addr_opt(gsym
);
9076 if (!can_plt_call
&& rela
.get_r_offset() + 8 <= view_size
)
9078 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
9079 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
9082 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
9084 elfcpp::Swap
<32, big_endian
>::
9085 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
9086 can_plt_call
= true;
9091 // If we don't have a branch and link followed by a nop,
9092 // we can't go via the plt because there is no place to
9093 // put a toc restoring instruction.
9094 // Unless we know we won't be returning.
9095 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
9096 can_plt_call
= true;
9100 // g++ as of 20130507 emits self-calls without a
9101 // following nop. This is arguably wrong since we have
9102 // conflicting information. On the one hand a global
9103 // symbol and on the other a local call sequence, but
9104 // don't error for this special case.
9105 // It isn't possible to cheaply verify we have exactly
9106 // such a call. Allow all calls to the same section.
9108 Address code
= value
;
9109 if (gsym
->source() == Symbol::FROM_OBJECT
9110 && gsym
->object() == object
)
9112 unsigned int dest_shndx
= 0;
9113 if (target
->abiversion() < 2)
9115 Address addend
= rela
.get_r_addend();
9116 code
= psymval
->value(object
, addend
);
9117 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
9118 &code
, &dest_shndx
);
9121 if (dest_shndx
== 0)
9122 dest_shndx
= gsym
->shndx(&is_ordinary
);
9123 ok
= dest_shndx
== relinfo
->data_shndx
;
9127 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9128 _("call lacks nop, can't restore toc; "
9129 "recompile with -fPIC"));
9135 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9136 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9137 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9138 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9140 // First instruction of a global dynamic sequence, arg setup insn.
9141 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9142 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
9143 enum Got_type got_type
= GOT_TYPE_STANDARD
;
9144 if (tls_type
== tls::TLSOPT_NONE
)
9145 got_type
= GOT_TYPE_TLSGD
;
9146 else if (tls_type
== tls::TLSOPT_TO_IE
)
9147 got_type
= GOT_TYPE_TPREL
;
9148 if (got_type
!= GOT_TYPE_STANDARD
)
9152 gold_assert(gsym
->has_got_offset(got_type
));
9153 value
= gsym
->got_offset(got_type
);
9157 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
9158 value
= object
->local_got_offset(r_sym
, got_type
);
9160 value
-= target
->got_section()->got_base_offset(object
);
9162 if (tls_type
== tls::TLSOPT_TO_IE
)
9164 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9165 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9167 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9168 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9169 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
9171 insn
|= 32 << 26; // lwz
9173 insn
|= 58 << 26; // ld
9174 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9176 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9177 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9179 else if (tls_type
== tls::TLSOPT_TO_LE
)
9181 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9182 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9184 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9185 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9186 insn
&= (1 << 26) - (1 << 21); // extract rt
9191 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9192 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9193 value
= psymval
->value(object
, rela
.get_r_addend());
9197 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9199 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9200 r_type
= elfcpp::R_POWERPC_NONE
;
9204 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9205 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9206 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9207 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9209 // First instruction of a local dynamic sequence, arg setup insn.
9210 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
9211 if (tls_type
== tls::TLSOPT_NONE
)
9213 value
= target
->tlsld_got_offset();
9214 value
-= target
->got_section()->got_base_offset(object
);
9218 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
9219 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9220 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9222 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9223 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9224 insn
&= (1 << 26) - (1 << 21); // extract rt
9229 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9230 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9235 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9237 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9238 r_type
= elfcpp::R_POWERPC_NONE
;
9242 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
9243 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
9244 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
9245 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
9247 // Accesses relative to a local dynamic sequence address,
9248 // no optimisation here.
9251 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
9252 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
9256 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
9257 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
9259 value
-= target
->got_section()->got_base_offset(object
);
9261 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9262 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9263 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9264 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9266 // First instruction of initial exec sequence.
9267 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9268 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
9269 if (tls_type
== tls::TLSOPT_NONE
)
9273 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
9274 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
9278 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
9279 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
9281 value
-= target
->got_section()->got_base_offset(object
);
9285 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
9286 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9287 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9289 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9290 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9291 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
9296 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9297 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9298 value
= psymval
->value(object
, rela
.get_r_addend());
9302 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9304 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9305 r_type
= elfcpp::R_POWERPC_NONE
;
9309 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9310 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9312 // Second instruction of a global dynamic sequence,
9313 // the __tls_get_addr call
9314 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
9315 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9316 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
9317 if (tls_type
!= tls::TLSOPT_NONE
)
9319 if (tls_type
== tls::TLSOPT_TO_IE
)
9321 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9322 Insn insn
= add_3_3_13
;
9325 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9326 r_type
= elfcpp::R_POWERPC_NONE
;
9330 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9331 Insn insn
= addi_3_3
;
9332 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9333 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9335 value
= psymval
->value(object
, rela
.get_r_addend());
9337 this->skip_next_tls_get_addr_call();
9340 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
9341 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
9343 // Second instruction of a local dynamic sequence,
9344 // the __tls_get_addr call
9345 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
9346 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
9347 if (tls_type
== tls::TLSOPT_TO_LE
)
9349 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9350 Insn insn
= addi_3_3
;
9351 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9352 this->skip_next_tls_get_addr_call();
9353 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9358 else if (r_type
== elfcpp::R_POWERPC_TLS
)
9360 // Second instruction of an initial exec sequence
9361 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9362 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
9363 if (tls_type
== tls::TLSOPT_TO_LE
)
9365 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9366 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9367 unsigned int reg
= size
== 32 ? 2 : 13;
9368 insn
= at_tls_transform(insn
, reg
);
9369 gold_assert(insn
!= 0);
9370 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9371 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
9373 value
= psymval
->value(object
, rela
.get_r_addend());
9376 else if (!has_stub_value
)
9378 if (!has_plt_offset
&& r_type
== elfcpp::R_POWERPC_PLTCALL
)
9380 // PLTCALL without plt entry => convert to direct call
9381 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9382 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9383 insn
= (insn
& 1) | b
;
9384 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9386 r_type
= elfcpp::R_PPC_PLTREL24
;
9388 r_type
= elfcpp::R_POWERPC_REL24
;
9392 && (r_type
== elfcpp::R_PPC_PLTREL24
9393 || r_type
== elfcpp::R_POWERPC_PLT16_LO
9394 || r_type
== elfcpp::R_POWERPC_PLT16_HI
9395 || r_type
== elfcpp::R_POWERPC_PLT16_HA
)))
9396 addend
= rela
.get_r_addend();
9397 value
= psymval
->value(object
, addend
);
9398 if (size
== 64 && is_branch_reloc(r_type
))
9400 if (target
->abiversion() >= 2)
9403 value
+= object
->ppc64_local_entry_offset(gsym
);
9405 value
+= object
->ppc64_local_entry_offset(r_sym
);
9409 unsigned int dest_shndx
;
9410 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
9411 &value
, &dest_shndx
);
9414 Address max_branch_offset
= max_branch_delta(r_type
);
9415 if (max_branch_offset
!= 0
9416 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
9418 Stub_table
<size
, big_endian
>* stub_table
9419 = object
->stub_table(relinfo
->data_shndx
);
9420 if (stub_table
!= NULL
)
9422 Address off
= stub_table
->find_long_branch_entry(object
, value
);
9423 if (off
!= invalid_address
)
9425 value
= (stub_table
->stub_address() + stub_table
->plt_size()
9427 has_stub_value
= true;
9435 case elfcpp::R_PPC64_REL64
:
9436 case elfcpp::R_POWERPC_REL32
:
9437 case elfcpp::R_POWERPC_REL24
:
9438 case elfcpp::R_PPC_PLTREL24
:
9439 case elfcpp::R_PPC_LOCAL24PC
:
9440 case elfcpp::R_POWERPC_REL16
:
9441 case elfcpp::R_POWERPC_REL16_LO
:
9442 case elfcpp::R_POWERPC_REL16_HI
:
9443 case elfcpp::R_POWERPC_REL16_HA
:
9444 case elfcpp::R_POWERPC_REL16DX_HA
:
9445 case elfcpp::R_PPC64_REL16_HIGH
:
9446 case elfcpp::R_PPC64_REL16_HIGHA
:
9447 case elfcpp::R_PPC64_REL16_HIGHER
:
9448 case elfcpp::R_PPC64_REL16_HIGHERA
:
9449 case elfcpp::R_PPC64_REL16_HIGHEST
:
9450 case elfcpp::R_PPC64_REL16_HIGHESTA
:
9451 case elfcpp::R_POWERPC_REL14
:
9452 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9453 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9457 case elfcpp::R_PPC64_TOC16
:
9458 case elfcpp::R_PPC64_TOC16_LO
:
9459 case elfcpp::R_PPC64_TOC16_HI
:
9460 case elfcpp::R_PPC64_TOC16_HA
:
9461 case elfcpp::R_PPC64_TOC16_DS
:
9462 case elfcpp::R_PPC64_TOC16_LO_DS
:
9463 // Subtract the TOC base address.
9464 value
-= (target
->got_section()->output_section()->address()
9465 + object
->toc_base_offset());
9468 case elfcpp::R_POWERPC_SECTOFF
:
9469 case elfcpp::R_POWERPC_SECTOFF_LO
:
9470 case elfcpp::R_POWERPC_SECTOFF_HI
:
9471 case elfcpp::R_POWERPC_SECTOFF_HA
:
9472 case elfcpp::R_PPC64_SECTOFF_DS
:
9473 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9475 value
-= os
->address();
9478 case elfcpp::R_PPC64_TPREL16_DS
:
9479 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9480 case elfcpp::R_PPC64_TPREL16_HIGH
:
9481 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9483 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
9486 case elfcpp::R_POWERPC_TPREL16
:
9487 case elfcpp::R_POWERPC_TPREL16_LO
:
9488 case elfcpp::R_POWERPC_TPREL16_HI
:
9489 case elfcpp::R_POWERPC_TPREL16_HA
:
9490 case elfcpp::R_POWERPC_TPREL
:
9491 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9492 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9493 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9494 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9495 // tls symbol values are relative to tls_segment()->vaddr()
9499 case elfcpp::R_PPC64_DTPREL16_DS
:
9500 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9501 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9502 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9503 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9504 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9506 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
9507 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
9510 case elfcpp::R_POWERPC_DTPREL16
:
9511 case elfcpp::R_POWERPC_DTPREL16_LO
:
9512 case elfcpp::R_POWERPC_DTPREL16_HI
:
9513 case elfcpp::R_POWERPC_DTPREL16_HA
:
9514 case elfcpp::R_POWERPC_DTPREL
:
9515 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9516 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9517 // tls symbol values are relative to tls_segment()->vaddr()
9518 value
-= dtp_offset
;
9521 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9523 value
+= object
->ppc64_local_entry_offset(gsym
);
9525 value
+= object
->ppc64_local_entry_offset(r_sym
);
9532 Insn branch_bit
= 0;
9535 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9536 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9537 branch_bit
= 1 << 21;
9539 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9540 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9542 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9543 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9546 if (this->is_isa_v2
)
9548 // Set 'a' bit. This is 0b00010 in BO field for branch
9549 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
9550 // for branch on CTR insns (BO == 1a00t or 1a01t).
9551 if ((insn
& (0x14 << 21)) == (0x04 << 21))
9553 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
9560 // Invert 'y' bit if not the default.
9561 if (static_cast<Signed_address
>(value
) < 0)
9564 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9568 case elfcpp::R_POWERPC_PLT16_HA
:
9570 && !parameters
->options().output_is_position_independent())
9572 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9573 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9575 // Convert addis to lis.
9576 if ((insn
& (0x3f << 26)) == 15u << 26
9577 && (insn
& (0x1f << 16)) != 0)
9579 insn
&= ~(0x1f << 16);
9580 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9596 // Multi-instruction sequences that access the GOT/TOC can
9597 // be optimized, eg.
9598 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
9599 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
9601 // addis ra,r2,0; addi rb,ra,x@toc@l;
9602 // to nop; addi rb,r2,x@toc;
9603 // FIXME: the @got sequence shown above is not yet
9604 // optimized. Note that gcc as of 2017-01-07 doesn't use
9605 // the ELF @got relocs except for TLS, instead using the
9606 // PowerOpen variant of a compiler managed GOT (called TOC).
9607 // The PowerOpen TOC sequence equivalent to the first
9608 // example is optimized.
9609 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9610 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9611 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9612 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9613 case elfcpp::R_POWERPC_GOT16_HA
:
9614 case elfcpp::R_PPC64_TOC16_HA
:
9615 if (parameters
->options().toc_optimize())
9617 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9618 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9619 if (r_type
== elfcpp::R_PPC64_TOC16_HA
9620 && object
->make_toc_relative(target
, &value
))
9622 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
9623 == ((15u << 26) | (2 << 16)));
9625 if (((insn
& ((0x3f << 26) | 0x1f << 16))
9626 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
9627 && value
+ 0x8000 < 0x10000)
9629 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9635 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9636 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9637 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9638 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9639 case elfcpp::R_POWERPC_GOT16_LO
:
9640 case elfcpp::R_PPC64_GOT16_LO_DS
:
9641 case elfcpp::R_PPC64_TOC16_LO
:
9642 case elfcpp::R_PPC64_TOC16_LO_DS
:
9643 if (parameters
->options().toc_optimize())
9645 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9646 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9647 bool changed
= false;
9648 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
9649 && object
->make_toc_relative(target
, &value
))
9651 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
9652 insn
^= (14u << 26) ^ (58u << 26);
9653 r_type
= elfcpp::R_PPC64_TOC16_LO
;
9656 if (ok_lo_toc_insn(insn
, r_type
)
9657 && value
+ 0x8000 < 0x10000)
9659 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
9661 // Transform addic to addi when we change reg.
9662 insn
&= ~((0x3f << 26) | (0x1f << 16));
9663 insn
|= (14u << 26) | (2 << 16);
9667 insn
&= ~(0x1f << 16);
9673 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9677 case elfcpp::R_POWERPC_TPREL16_HA
:
9678 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9680 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9681 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9682 if ((insn
& ((0x3f << 26) | 0x1f << 16))
9683 != ((15u << 26) | ((size
== 32 ? 2 : 13) << 16)))
9687 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9693 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9695 // R_PPC_TLSGD, R_PPC_TLSLD
9698 case elfcpp::R_POWERPC_TPREL16_LO
:
9699 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9701 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9702 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9703 insn
&= ~(0x1f << 16);
9704 insn
|= (size
== 32 ? 2 : 13) << 16;
9705 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9709 case elfcpp::R_PPC64_ENTRY
:
9710 value
= (target
->got_section()->output_section()->address()
9711 + object
->toc_base_offset());
9712 if (value
+ 0x80008000 <= 0xffffffff
9713 && !parameters
->options().output_is_position_independent())
9715 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9716 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9717 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9719 if ((insn1
& ~0xfffc) == ld_2_12
9720 && insn2
== add_2_2_12
)
9722 insn1
= lis_2
+ ha(value
);
9723 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9724 insn2
= addi_2_2
+ l(value
);
9725 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9732 if (value
+ 0x80008000 <= 0xffffffff)
9734 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9735 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9736 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9738 if ((insn1
& ~0xfffc) == ld_2_12
9739 && insn2
== add_2_2_12
)
9741 insn1
= addis_2_12
+ ha(value
);
9742 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9743 insn2
= addi_2_2
+ l(value
);
9744 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9751 case elfcpp::R_POWERPC_REL16_LO
:
9752 // If we are generating a non-PIC executable, edit
9753 // 0: addis 2,12,.TOC.-0b@ha
9754 // addi 2,2,.TOC.-0b@l
9755 // used by ELFv2 global entry points to set up r2, to
9758 // if .TOC. is in range. */
9759 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
9762 && target
->abiversion() >= 2
9763 && !parameters
->options().output_is_position_independent()
9764 && rela
.get_r_addend() == d_offset
+ 4
9766 && strcmp(gsym
->name(), ".TOC.") == 0)
9768 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9769 Reltype
prev_rela(preloc
- reloc_size
);
9770 if ((prev_rela
.get_r_info()
9771 == elfcpp::elf_r_info
<size
>(r_sym
,
9772 elfcpp::R_POWERPC_REL16_HA
))
9773 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
9774 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
9776 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9777 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
9778 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9780 if ((insn1
& 0xffff0000) == addis_2_12
9781 && (insn2
& 0xffff0000) == addi_2_2
)
9783 insn1
= lis_2
+ ha(value
+ address
- 4);
9784 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
9785 insn2
= addi_2_2
+ l(value
+ address
- 4);
9786 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
9789 relinfo
->rr
->set_strategy(relnum
- 1,
9790 Relocatable_relocs::RELOC_SPECIAL
);
9791 relinfo
->rr
->set_strategy(relnum
,
9792 Relocatable_relocs::RELOC_SPECIAL
);
9802 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
9803 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
9806 case elfcpp::R_POWERPC_ADDR32
:
9807 case elfcpp::R_POWERPC_UADDR32
:
9809 overflow
= Reloc::CHECK_BITFIELD
;
9812 case elfcpp::R_POWERPC_REL32
:
9813 case elfcpp::R_POWERPC_REL16DX_HA
:
9815 overflow
= Reloc::CHECK_SIGNED
;
9818 case elfcpp::R_POWERPC_UADDR16
:
9819 overflow
= Reloc::CHECK_BITFIELD
;
9822 case elfcpp::R_POWERPC_ADDR16
:
9823 // We really should have three separate relocations,
9824 // one for 16-bit data, one for insns with 16-bit signed fields,
9825 // and one for insns with 16-bit unsigned fields.
9826 overflow
= Reloc::CHECK_BITFIELD
;
9827 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
9828 overflow
= Reloc::CHECK_LOW_INSN
;
9831 case elfcpp::R_POWERPC_ADDR16_HI
:
9832 case elfcpp::R_POWERPC_ADDR16_HA
:
9833 case elfcpp::R_POWERPC_GOT16_HI
:
9834 case elfcpp::R_POWERPC_GOT16_HA
:
9835 case elfcpp::R_POWERPC_PLT16_HI
:
9836 case elfcpp::R_POWERPC_PLT16_HA
:
9837 case elfcpp::R_POWERPC_SECTOFF_HI
:
9838 case elfcpp::R_POWERPC_SECTOFF_HA
:
9839 case elfcpp::R_PPC64_TOC16_HI
:
9840 case elfcpp::R_PPC64_TOC16_HA
:
9841 case elfcpp::R_PPC64_PLTGOT16_HI
:
9842 case elfcpp::R_PPC64_PLTGOT16_HA
:
9843 case elfcpp::R_POWERPC_TPREL16_HI
:
9844 case elfcpp::R_POWERPC_TPREL16_HA
:
9845 case elfcpp::R_POWERPC_DTPREL16_HI
:
9846 case elfcpp::R_POWERPC_DTPREL16_HA
:
9847 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9848 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9849 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9850 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9851 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9852 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9853 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9854 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9855 case elfcpp::R_POWERPC_REL16_HI
:
9856 case elfcpp::R_POWERPC_REL16_HA
:
9858 overflow
= Reloc::CHECK_HIGH_INSN
;
9861 case elfcpp::R_POWERPC_REL16
:
9862 case elfcpp::R_PPC64_TOC16
:
9863 case elfcpp::R_POWERPC_GOT16
:
9864 case elfcpp::R_POWERPC_SECTOFF
:
9865 case elfcpp::R_POWERPC_TPREL16
:
9866 case elfcpp::R_POWERPC_DTPREL16
:
9867 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9868 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9869 case elfcpp::R_POWERPC_GOT_TPREL16
:
9870 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9871 overflow
= Reloc::CHECK_LOW_INSN
;
9874 case elfcpp::R_POWERPC_ADDR24
:
9875 case elfcpp::R_POWERPC_ADDR14
:
9876 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9877 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9878 case elfcpp::R_PPC64_ADDR16_DS
:
9879 case elfcpp::R_POWERPC_REL24
:
9880 case elfcpp::R_PPC_PLTREL24
:
9881 case elfcpp::R_PPC_LOCAL24PC
:
9882 case elfcpp::R_PPC64_TPREL16_DS
:
9883 case elfcpp::R_PPC64_DTPREL16_DS
:
9884 case elfcpp::R_PPC64_TOC16_DS
:
9885 case elfcpp::R_PPC64_GOT16_DS
:
9886 case elfcpp::R_PPC64_SECTOFF_DS
:
9887 case elfcpp::R_POWERPC_REL14
:
9888 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9889 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9890 overflow
= Reloc::CHECK_SIGNED
;
9894 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9897 if (overflow
== Reloc::CHECK_LOW_INSN
9898 || overflow
== Reloc::CHECK_HIGH_INSN
)
9900 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9902 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
9903 overflow
= Reloc::CHECK_BITFIELD
;
9904 else if (overflow
== Reloc::CHECK_LOW_INSN
9905 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
9906 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
9907 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
9908 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
9909 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
9910 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
9911 overflow
= Reloc::CHECK_UNSIGNED
;
9913 overflow
= Reloc::CHECK_SIGNED
;
9916 bool maybe_dq_reloc
= false;
9917 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
9918 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
9921 case elfcpp::R_POWERPC_NONE
:
9922 case elfcpp::R_POWERPC_TLS
:
9923 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
9924 case elfcpp::R_POWERPC_GNU_VTENTRY
:
9925 case elfcpp::R_POWERPC_PLTSEQ
:
9926 case elfcpp::R_POWERPC_PLTCALL
:
9929 case elfcpp::R_PPC64_ADDR64
:
9930 case elfcpp::R_PPC64_REL64
:
9931 case elfcpp::R_PPC64_TOC
:
9932 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9933 Reloc::addr64(view
, value
);
9936 case elfcpp::R_POWERPC_TPREL
:
9937 case elfcpp::R_POWERPC_DTPREL
:
9939 Reloc::addr64(view
, value
);
9941 status
= Reloc::addr32(view
, value
, overflow
);
9944 case elfcpp::R_PPC64_UADDR64
:
9945 Reloc::addr64_u(view
, value
);
9948 case elfcpp::R_POWERPC_ADDR32
:
9949 status
= Reloc::addr32(view
, value
, overflow
);
9952 case elfcpp::R_POWERPC_REL32
:
9953 case elfcpp::R_POWERPC_UADDR32
:
9954 status
= Reloc::addr32_u(view
, value
, overflow
);
9957 case elfcpp::R_POWERPC_ADDR24
:
9958 case elfcpp::R_POWERPC_REL24
:
9959 case elfcpp::R_PPC_PLTREL24
:
9960 case elfcpp::R_PPC_LOCAL24PC
:
9961 status
= Reloc::addr24(view
, value
, overflow
);
9964 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9965 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9966 case elfcpp::R_POWERPC_GOT_TPREL16
:
9967 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9970 // On ppc64 these are all ds form
9971 maybe_dq_reloc
= true;
9975 case elfcpp::R_POWERPC_ADDR16
:
9976 case elfcpp::R_POWERPC_REL16
:
9977 case elfcpp::R_PPC64_TOC16
:
9978 case elfcpp::R_POWERPC_GOT16
:
9979 case elfcpp::R_POWERPC_SECTOFF
:
9980 case elfcpp::R_POWERPC_TPREL16
:
9981 case elfcpp::R_POWERPC_DTPREL16
:
9982 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9983 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9984 case elfcpp::R_POWERPC_ADDR16_LO
:
9985 case elfcpp::R_POWERPC_REL16_LO
:
9986 case elfcpp::R_PPC64_TOC16_LO
:
9987 case elfcpp::R_POWERPC_GOT16_LO
:
9988 case elfcpp::R_POWERPC_PLT16_LO
:
9989 case elfcpp::R_POWERPC_SECTOFF_LO
:
9990 case elfcpp::R_POWERPC_TPREL16_LO
:
9991 case elfcpp::R_POWERPC_DTPREL16_LO
:
9992 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9993 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9995 status
= Reloc::addr16(view
, value
, overflow
);
9997 maybe_dq_reloc
= true;
10000 case elfcpp::R_POWERPC_UADDR16
:
10001 status
= Reloc::addr16_u(view
, value
, overflow
);
10004 case elfcpp::R_PPC64_ADDR16_HIGH
:
10005 case elfcpp::R_PPC64_TPREL16_HIGH
:
10006 case elfcpp::R_PPC64_DTPREL16_HIGH
:
10008 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
10011 case elfcpp::R_POWERPC_ADDR16_HI
:
10012 case elfcpp::R_POWERPC_REL16_HI
:
10013 case elfcpp::R_PPC64_REL16_HIGH
:
10014 case elfcpp::R_PPC64_TOC16_HI
:
10015 case elfcpp::R_POWERPC_GOT16_HI
:
10016 case elfcpp::R_POWERPC_PLT16_HI
:
10017 case elfcpp::R_POWERPC_SECTOFF_HI
:
10018 case elfcpp::R_POWERPC_TPREL16_HI
:
10019 case elfcpp::R_POWERPC_DTPREL16_HI
:
10020 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
10021 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
10022 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
10023 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
10024 Reloc::addr16_hi(view
, value
);
10027 case elfcpp::R_PPC64_ADDR16_HIGHA
:
10028 case elfcpp::R_PPC64_TPREL16_HIGHA
:
10029 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
10031 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
10034 case elfcpp::R_POWERPC_ADDR16_HA
:
10035 case elfcpp::R_POWERPC_REL16_HA
:
10036 case elfcpp::R_PPC64_REL16_HIGHA
:
10037 case elfcpp::R_PPC64_TOC16_HA
:
10038 case elfcpp::R_POWERPC_GOT16_HA
:
10039 case elfcpp::R_POWERPC_PLT16_HA
:
10040 case elfcpp::R_POWERPC_SECTOFF_HA
:
10041 case elfcpp::R_POWERPC_TPREL16_HA
:
10042 case elfcpp::R_POWERPC_DTPREL16_HA
:
10043 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
10044 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
10045 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
10046 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
10047 Reloc::addr16_ha(view
, value
);
10050 case elfcpp::R_POWERPC_REL16DX_HA
:
10051 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
10054 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
10056 // R_PPC_EMB_NADDR16_LO
10059 case elfcpp::R_PPC64_ADDR16_HIGHER
:
10060 case elfcpp::R_PPC64_REL16_HIGHER
:
10061 case elfcpp::R_PPC64_TPREL16_HIGHER
:
10062 Reloc::addr16_hi2(view
, value
);
10065 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
10067 // R_PPC_EMB_NADDR16_HI
10070 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
10071 case elfcpp::R_PPC64_REL16_HIGHERA
:
10072 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
10073 Reloc::addr16_ha2(view
, value
);
10076 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
10078 // R_PPC_EMB_NADDR16_HA
10081 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
10082 case elfcpp::R_PPC64_REL16_HIGHEST
:
10083 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
10084 Reloc::addr16_hi3(view
, value
);
10087 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
10089 // R_PPC_EMB_SDAI16
10092 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
10093 case elfcpp::R_PPC64_REL16_HIGHESTA
:
10094 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
10095 Reloc::addr16_ha3(view
, value
);
10098 case elfcpp::R_PPC64_DTPREL16_DS
:
10099 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
10101 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
10104 case elfcpp::R_PPC64_TPREL16_DS
:
10105 case elfcpp::R_PPC64_TPREL16_LO_DS
:
10107 // R_PPC_TLSGD, R_PPC_TLSLD
10110 case elfcpp::R_PPC64_ADDR16_DS
:
10111 case elfcpp::R_PPC64_ADDR16_LO_DS
:
10112 case elfcpp::R_PPC64_TOC16_DS
:
10113 case elfcpp::R_PPC64_TOC16_LO_DS
:
10114 case elfcpp::R_PPC64_GOT16_DS
:
10115 case elfcpp::R_PPC64_GOT16_LO_DS
:
10116 case elfcpp::R_PPC64_PLT16_LO_DS
:
10117 case elfcpp::R_PPC64_SECTOFF_DS
:
10118 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
10119 maybe_dq_reloc
= true;
10122 case elfcpp::R_POWERPC_ADDR14
:
10123 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
10124 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
10125 case elfcpp::R_POWERPC_REL14
:
10126 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
10127 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
10128 status
= Reloc::addr14(view
, value
, overflow
);
10131 case elfcpp::R_POWERPC_COPY
:
10132 case elfcpp::R_POWERPC_GLOB_DAT
:
10133 case elfcpp::R_POWERPC_JMP_SLOT
:
10134 case elfcpp::R_POWERPC_RELATIVE
:
10135 case elfcpp::R_POWERPC_DTPMOD
:
10136 case elfcpp::R_PPC64_JMP_IREL
:
10137 case elfcpp::R_POWERPC_IRELATIVE
:
10138 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
10139 _("unexpected reloc %u in object file"),
10143 case elfcpp::R_PPC64_TOCSAVE
:
10149 Symbol_location loc
;
10150 loc
.object
= relinfo
->object
;
10151 loc
.shndx
= relinfo
->data_shndx
;
10152 loc
.offset
= rela
.get_r_offset();
10153 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
10154 if (p
!= target
->tocsave_loc().end())
10156 // If we've generated plt calls using this tocsave, then
10157 // the nop needs to be changed to save r2.
10158 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
10159 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
10160 elfcpp::Swap
<32, big_endian
>::
10161 writeval(iview
, std_2_1
+ target
->stk_toc());
10166 case elfcpp::R_PPC_EMB_SDA2I16
:
10167 case elfcpp::R_PPC_EMB_SDA2REL
:
10170 // R_PPC64_TLSGD, R_PPC64_TLSLD
10173 case elfcpp::R_POWERPC_PLT32
:
10174 case elfcpp::R_POWERPC_PLTREL32
:
10175 case elfcpp::R_PPC_SDAREL16
:
10176 case elfcpp::R_POWERPC_ADDR30
:
10177 case elfcpp::R_PPC64_PLT64
:
10178 case elfcpp::R_PPC64_PLTREL64
:
10179 case elfcpp::R_PPC64_PLTGOT16
:
10180 case elfcpp::R_PPC64_PLTGOT16_LO
:
10181 case elfcpp::R_PPC64_PLTGOT16_HI
:
10182 case elfcpp::R_PPC64_PLTGOT16_HA
:
10183 case elfcpp::R_PPC64_PLTGOT16_DS
:
10184 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
10185 case elfcpp::R_PPC_EMB_RELSDA
:
10186 case elfcpp::R_PPC_TOC16
:
10189 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
10190 _("unsupported reloc %u"),
10195 if (maybe_dq_reloc
)
10198 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
10200 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
10201 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
10202 && (insn
& 3) == 1))
10203 status
= Reloc::addr16_dq(view
, value
, overflow
);
10204 else if (size
== 64
10205 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
10206 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
10207 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
10208 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
10209 status
= Reloc::addr16_ds(view
, value
, overflow
);
10211 status
= Reloc::addr16(view
, value
, overflow
);
10214 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
10217 && gsym
->is_undefined()
10218 && is_branch_reloc(r_type
))))
10220 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
10221 _("relocation overflow"));
10222 if (has_stub_value
)
10223 gold_info(_("try relinking with a smaller --stub-group-size"));
10229 // Relocate section data.
10231 template<int size
, bool big_endian
>
10233 Target_powerpc
<size
, big_endian
>::relocate_section(
10234 const Relocate_info
<size
, big_endian
>* relinfo
,
10235 unsigned int sh_type
,
10236 const unsigned char* prelocs
,
10237 size_t reloc_count
,
10238 Output_section
* output_section
,
10239 bool needs_special_offset_handling
,
10240 unsigned char* view
,
10242 section_size_type view_size
,
10243 const Reloc_symbol_changes
* reloc_symbol_changes
)
10245 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
10246 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
10247 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
10248 Powerpc_comdat_behavior
;
10249 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10252 gold_assert(sh_type
== elfcpp::SHT_RELA
);
10254 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
10255 Powerpc_comdat_behavior
, Classify_reloc
>(
10261 needs_special_offset_handling
,
10265 reloc_symbol_changes
);
10268 template<int size
, bool big_endian
>
10269 class Powerpc_scan_relocatable_reloc
10272 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
10273 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
10274 static const int sh_type
= elfcpp::SHT_RELA
;
10276 // Return the symbol referred to by the relocation.
10277 static inline unsigned int
10278 get_r_sym(const Reltype
* reloc
)
10279 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
10281 // Return the type of the relocation.
10282 static inline unsigned int
10283 get_r_type(const Reltype
* reloc
)
10284 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
10286 // Return the strategy to use for a local symbol which is not a
10287 // section symbol, given the relocation type.
10288 inline Relocatable_relocs::Reloc_strategy
10289 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
10291 if (r_type
== 0 && r_sym
== 0)
10292 return Relocatable_relocs::RELOC_DISCARD
;
10293 return Relocatable_relocs::RELOC_COPY
;
10296 // Return the strategy to use for a local symbol which is a section
10297 // symbol, given the relocation type.
10298 inline Relocatable_relocs::Reloc_strategy
10299 local_section_strategy(unsigned int, Relobj
*)
10301 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
10304 // Return the strategy to use for a global symbol, given the
10305 // relocation type, the object, and the symbol index.
10306 inline Relocatable_relocs::Reloc_strategy
10307 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
10310 && (r_type
== elfcpp::R_PPC_PLTREL24
10311 || r_type
== elfcpp::R_POWERPC_PLT16_LO
10312 || r_type
== elfcpp::R_POWERPC_PLT16_HI
10313 || r_type
== elfcpp::R_POWERPC_PLT16_HA
))
10314 return Relocatable_relocs::RELOC_SPECIAL
;
10315 return Relocatable_relocs::RELOC_COPY
;
10319 // Scan the relocs during a relocatable link.
10321 template<int size
, bool big_endian
>
10323 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
10324 Symbol_table
* symtab
,
10326 Sized_relobj_file
<size
, big_endian
>* object
,
10327 unsigned int data_shndx
,
10328 unsigned int sh_type
,
10329 const unsigned char* prelocs
,
10330 size_t reloc_count
,
10331 Output_section
* output_section
,
10332 bool needs_special_offset_handling
,
10333 size_t local_symbol_count
,
10334 const unsigned char* plocal_symbols
,
10335 Relocatable_relocs
* rr
)
10337 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
10339 gold_assert(sh_type
== elfcpp::SHT_RELA
);
10341 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
10349 needs_special_offset_handling
,
10350 local_symbol_count
,
10355 // Scan the relocs for --emit-relocs.
10357 template<int size
, bool big_endian
>
10359 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
10360 Symbol_table
* symtab
,
10362 Sized_relobj_file
<size
, big_endian
>* object
,
10363 unsigned int data_shndx
,
10364 unsigned int sh_type
,
10365 const unsigned char* prelocs
,
10366 size_t reloc_count
,
10367 Output_section
* output_section
,
10368 bool needs_special_offset_handling
,
10369 size_t local_symbol_count
,
10370 const unsigned char* plocal_syms
,
10371 Relocatable_relocs
* rr
)
10373 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10375 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
10376 Emit_relocs_strategy
;
10378 gold_assert(sh_type
== elfcpp::SHT_RELA
);
10380 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
10388 needs_special_offset_handling
,
10389 local_symbol_count
,
10394 // Emit relocations for a section.
10395 // This is a modified version of the function by the same name in
10396 // target-reloc.h. Using relocate_special_relocatable for
10397 // R_PPC_PLTREL24 would require duplication of the entire body of the
10398 // loop, so we may as well duplicate the whole thing.
10400 template<int size
, bool big_endian
>
10402 Target_powerpc
<size
, big_endian
>::relocate_relocs(
10403 const Relocate_info
<size
, big_endian
>* relinfo
,
10404 unsigned int sh_type
,
10405 const unsigned char* prelocs
,
10406 size_t reloc_count
,
10407 Output_section
* output_section
,
10408 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
10410 Address view_address
,
10412 unsigned char* reloc_view
,
10413 section_size_type reloc_view_size
)
10415 gold_assert(sh_type
== elfcpp::SHT_RELA
);
10417 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
10418 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
10419 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
10420 // Offset from start of insn to d-field reloc.
10421 const int d_offset
= big_endian
? 2 : 0;
10423 Powerpc_relobj
<size
, big_endian
>* const object
10424 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
10425 const unsigned int local_count
= object
->local_symbol_count();
10426 unsigned int got2_shndx
= object
->got2_shndx();
10427 Address got2_addend
= 0;
10428 if (got2_shndx
!= 0)
10430 got2_addend
= object
->get_output_section_offset(got2_shndx
);
10431 gold_assert(got2_addend
!= invalid_address
);
10434 const bool relocatable
= parameters
->options().relocatable();
10436 unsigned char* pwrite
= reloc_view
;
10437 bool zap_next
= false;
10438 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
10440 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
10441 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
10444 Reltype
reloc(prelocs
);
10445 Reltype_write
reloc_write(pwrite
);
10447 Address offset
= reloc
.get_r_offset();
10448 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
10449 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
10450 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
10451 const unsigned int orig_r_sym
= r_sym
;
10452 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
10453 = reloc
.get_r_addend();
10454 const Symbol
* gsym
= NULL
;
10458 // We could arrange to discard these and other relocs for
10459 // tls optimised sequences in the strategy methods, but for
10460 // now do as BFD ld does.
10461 r_type
= elfcpp::R_POWERPC_NONE
;
10465 // Get the new symbol index.
10466 Output_section
* os
= NULL
;
10467 if (r_sym
< local_count
)
10471 case Relocatable_relocs::RELOC_COPY
:
10472 case Relocatable_relocs::RELOC_SPECIAL
:
10475 r_sym
= object
->symtab_index(r_sym
);
10476 gold_assert(r_sym
!= -1U);
10480 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
10482 // We are adjusting a section symbol. We need to find
10483 // the symbol table index of the section symbol for
10484 // the output section corresponding to input section
10485 // in which this symbol is defined.
10486 gold_assert(r_sym
< local_count
);
10488 unsigned int shndx
=
10489 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
10490 gold_assert(is_ordinary
);
10491 os
= object
->output_section(shndx
);
10492 gold_assert(os
!= NULL
);
10493 gold_assert(os
->needs_symtab_index());
10494 r_sym
= os
->symtab_index();
10499 gold_unreachable();
10504 gsym
= object
->global_symbol(r_sym
);
10505 gold_assert(gsym
!= NULL
);
10506 if (gsym
->is_forwarder())
10507 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
10509 gold_assert(gsym
->has_symtab_index());
10510 r_sym
= gsym
->symtab_index();
10513 // Get the new offset--the location in the output section where
10514 // this relocation should be applied.
10515 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
10516 offset
+= offset_in_output_section
;
10519 section_offset_type sot_offset
=
10520 convert_types
<section_offset_type
, Address
>(offset
);
10521 section_offset_type new_sot_offset
=
10522 output_section
->output_offset(object
, relinfo
->data_shndx
,
10524 gold_assert(new_sot_offset
!= -1);
10525 offset
= new_sot_offset
;
10528 // In an object file, r_offset is an offset within the section.
10529 // In an executable or dynamic object, generated by
10530 // --emit-relocs, r_offset is an absolute address.
10533 offset
+= view_address
;
10534 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
10535 offset
-= offset_in_output_section
;
10538 // Handle the reloc addend based on the strategy.
10539 if (strategy
== Relocatable_relocs::RELOC_COPY
)
10541 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
10543 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
10544 addend
= psymval
->value(object
, addend
);
10545 // In a relocatable link, the symbol value is relative to
10546 // the start of the output section. For a non-relocatable
10547 // link, we need to adjust the addend.
10550 gold_assert(os
!= NULL
);
10551 addend
-= os
->address();
10554 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
10558 if (addend
>= 32768)
10559 addend
+= got2_addend
;
10561 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
10563 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
10564 addend
-= d_offset
;
10566 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
10568 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
10569 addend
-= d_offset
+ 4;
10573 gold_unreachable();
10577 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
10578 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
10579 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
10580 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
10582 // First instruction of a global dynamic sequence,
10584 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10585 switch (this->optimize_tls_gd(final
))
10587 case tls::TLSOPT_TO_IE
:
10588 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
10589 - elfcpp::R_POWERPC_GOT_TLSGD16
);
10591 case tls::TLSOPT_TO_LE
:
10592 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
10593 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
10594 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
10597 r_type
= elfcpp::R_POWERPC_NONE
;
10598 offset
-= d_offset
;
10605 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
10606 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
10607 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
10608 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
10610 // First instruction of a local dynamic sequence,
10612 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10614 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
10615 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
10617 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
10618 const Output_section
* os
= relinfo
->layout
->tls_segment()
10620 gold_assert(os
!= NULL
);
10621 gold_assert(os
->needs_symtab_index());
10622 r_sym
= os
->symtab_index();
10623 addend
= dtp_offset
;
10627 r_type
= elfcpp::R_POWERPC_NONE
;
10628 offset
-= d_offset
;
10632 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
10633 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
10634 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
10635 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
10637 // First instruction of initial exec sequence.
10638 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10639 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10641 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
10642 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
10643 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
10646 r_type
= elfcpp::R_POWERPC_NONE
;
10647 offset
-= d_offset
;
10651 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
10652 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
10654 // Second instruction of a global dynamic sequence,
10655 // the __tls_get_addr call
10656 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10657 switch (this->optimize_tls_gd(final
))
10659 case tls::TLSOPT_TO_IE
:
10660 r_type
= elfcpp::R_POWERPC_NONE
;
10663 case tls::TLSOPT_TO_LE
:
10664 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10665 offset
+= d_offset
;
10672 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
10673 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
10675 // Second instruction of a local dynamic sequence,
10676 // the __tls_get_addr call
10677 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10679 const Output_section
* os
= relinfo
->layout
->tls_segment()
10681 gold_assert(os
!= NULL
);
10682 gold_assert(os
->needs_symtab_index());
10683 r_sym
= os
->symtab_index();
10684 addend
= dtp_offset
;
10685 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10686 offset
+= d_offset
;
10690 else if (r_type
== elfcpp::R_POWERPC_TLS
)
10692 // Second instruction of an initial exec sequence
10693 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10694 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10696 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10697 offset
+= d_offset
;
10702 reloc_write
.put_r_offset(offset
);
10703 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
10704 reloc_write
.put_r_addend(addend
);
10706 pwrite
+= reloc_size
;
10709 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
10710 == reloc_view_size
);
10713 // Return the value to use for a dynamic symbol which requires special
10714 // treatment. This is how we support equality comparisons of function
10715 // pointers across shared library boundaries, as described in the
10716 // processor specific ABI supplement.
10718 template<int size
, bool big_endian
>
10720 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
10724 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
10725 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10726 p
!= this->stub_tables_
.end();
10729 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10730 = (*p
)->find_plt_call_entry(gsym
);
10732 return (*p
)->stub_address() + ent
->off_
;
10735 else if (this->abiversion() >= 2)
10737 Address off
= this->glink_section()->find_global_entry(gsym
);
10738 if (off
!= invalid_address
)
10739 return this->glink_section()->global_entry_address() + off
;
10741 gold_unreachable();
10744 // Return the PLT address to use for a local symbol.
10745 template<int size
, bool big_endian
>
10747 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
10748 const Relobj
* object
,
10749 unsigned int symndx
) const
10753 const Sized_relobj
<size
, big_endian
>* relobj
10754 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
10755 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10756 p
!= this->stub_tables_
.end();
10759 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10760 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
10762 return (*p
)->stub_address() + ent
->off_
;
10765 gold_unreachable();
10768 // Return the PLT address to use for a global symbol.
10769 template<int size
, bool big_endian
>
10771 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
10772 const Symbol
* gsym
) const
10776 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10777 p
!= this->stub_tables_
.end();
10780 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10781 = (*p
)->find_plt_call_entry(gsym
);
10783 return (*p
)->stub_address() + ent
->off_
;
10786 else if (this->abiversion() >= 2)
10788 Address off
= this->glink_section()->find_global_entry(gsym
);
10789 if (off
!= invalid_address
)
10790 return this->glink_section()->global_entry_address() + off
;
10792 gold_unreachable();
10795 // Return the offset to use for the GOT_INDX'th got entry which is
10796 // for a local tls symbol specified by OBJECT, SYMNDX.
10797 template<int size
, bool big_endian
>
10799 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
10800 const Relobj
* object
,
10801 unsigned int symndx
,
10802 unsigned int got_indx
) const
10804 const Powerpc_relobj
<size
, big_endian
>* ppc_object
10805 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
10806 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
10808 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10809 got_type
<= GOT_TYPE_TPREL
;
10810 got_type
= Got_type(got_type
+ 1))
10811 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
10813 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
10814 if (got_type
== GOT_TYPE_TLSGD
)
10816 if (off
== got_indx
* (size
/ 8))
10818 if (got_type
== GOT_TYPE_TPREL
)
10821 return -dtp_offset
;
10825 gold_unreachable();
10828 // Return the offset to use for the GOT_INDX'th got entry which is
10829 // for global tls symbol GSYM.
10830 template<int size
, bool big_endian
>
10832 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
10834 unsigned int got_indx
) const
10836 if (gsym
->type() == elfcpp::STT_TLS
)
10838 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10839 got_type
<= GOT_TYPE_TPREL
;
10840 got_type
= Got_type(got_type
+ 1))
10841 if (gsym
->has_got_offset(got_type
))
10843 unsigned int off
= gsym
->got_offset(got_type
);
10844 if (got_type
== GOT_TYPE_TLSGD
)
10846 if (off
== got_indx
* (size
/ 8))
10848 if (got_type
== GOT_TYPE_TPREL
)
10851 return -dtp_offset
;
10855 gold_unreachable();
10858 // The selector for powerpc object files.
10860 template<int size
, bool big_endian
>
10861 class Target_selector_powerpc
: public Target_selector
10864 Target_selector_powerpc()
10865 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
10868 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
10869 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
10871 ? (big_endian
? "elf64ppc" : "elf64lppc")
10872 : (big_endian
? "elf32ppc" : "elf32lppc")))
10876 do_instantiate_target()
10877 { return new Target_powerpc
<size
, big_endian
>(); }
10880 Target_selector_powerpc
<32, true> target_selector_ppc32
;
10881 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
10882 Target_selector_powerpc
<64, true> target_selector_ppc64
;
10883 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
10885 // Instantiate these constants for -O0
10886 template<int size
, bool big_endian
>
10887 const typename Output_data_glink
<size
, big_endian
>::Address
10888 Output_data_glink
<size
, big_endian
>::invalid_address
;
10889 template<int size
, bool big_endian
>
10890 const typename Stub_table
<size
, big_endian
>::Address
10891 Stub_table
<size
, big_endian
>::invalid_address
;
10892 template<int size
, bool big_endian
>
10893 const typename Target_powerpc
<size
, big_endian
>::Address
10894 Target_powerpc
<size
, big_endian
>::invalid_address
;
10896 } // End anonymous namespace.