1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
65 template<int size
, bool big_endian
>
66 class Output_data_save_res
;
68 template<int size
, bool big_endian
>
71 struct Stub_table_owner
73 Output_section
* output_section
;
74 const Output_section::Input_section
* owner
;
78 is_branch_reloc(unsigned int r_type
);
80 template<int size
, bool big_endian
>
81 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
84 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
85 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
86 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
88 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
89 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
90 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
91 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
92 opd_ent_(), access_from_map_(), has14_(), stub_table_index_(),
93 e_flags_(ehdr
.get_e_flags()), st_other_()
95 this->set_abiversion(0);
101 // Read the symbols then set up st_other vector.
103 do_read_symbols(Read_symbols_data
*);
105 // The .got2 section shndx.
110 return this->special_
;
115 // The .opd section shndx.
122 return this->special_
;
125 // Init OPD entry arrays.
127 init_opd(size_t opd_size
)
129 size_t count
= this->opd_ent_ndx(opd_size
);
130 this->opd_ent_
.resize(count
);
133 // Return section and offset of function entry for .opd + R_OFF.
135 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
137 size_t ndx
= this->opd_ent_ndx(r_off
);
138 gold_assert(ndx
< this->opd_ent_
.size());
139 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
141 *value
= this->opd_ent_
[ndx
].off
;
142 return this->opd_ent_
[ndx
].shndx
;
145 // Set section and offset of function entry for .opd + R_OFF.
147 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
149 size_t ndx
= this->opd_ent_ndx(r_off
);
150 gold_assert(ndx
< this->opd_ent_
.size());
151 this->opd_ent_
[ndx
].shndx
= shndx
;
152 this->opd_ent_
[ndx
].off
= value
;
155 // Return discard flag for .opd + R_OFF.
157 get_opd_discard(Address r_off
) const
159 size_t ndx
= this->opd_ent_ndx(r_off
);
160 gold_assert(ndx
< this->opd_ent_
.size());
161 return this->opd_ent_
[ndx
].discard
;
164 // Set discard flag for .opd + R_OFF.
166 set_opd_discard(Address r_off
)
168 size_t ndx
= this->opd_ent_ndx(r_off
);
169 gold_assert(ndx
< this->opd_ent_
.size());
170 this->opd_ent_
[ndx
].discard
= true;
175 { return this->opd_valid_
; }
179 { this->opd_valid_
= true; }
181 // Examine .rela.opd to build info about function entry points.
183 scan_opd_relocs(size_t reloc_count
,
184 const unsigned char* prelocs
,
185 const unsigned char* plocal_syms
);
187 // Perform the Sized_relobj_file method, then set up opd info from
190 do_read_relocs(Read_relocs_data
*);
193 do_find_special_sections(Read_symbols_data
* sd
);
195 // Adjust this local symbol value. Return false if the symbol
196 // should be discarded from the output file.
198 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
200 if (size
== 64 && this->opd_shndx() != 0)
203 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
205 if (this->get_opd_discard(lv
->input_value()))
213 { return &this->access_from_map_
; }
215 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
216 // section at DST_OFF.
218 add_reference(Relobj
* src_obj
,
219 unsigned int src_indx
,
220 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
222 Section_id
src_id(src_obj
, src_indx
);
223 this->access_from_map_
[dst_off
].insert(src_id
);
226 // Add a reference to the code section specified by the .opd entry
229 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
231 size_t ndx
= this->opd_ent_ndx(dst_off
);
232 if (ndx
>= this->opd_ent_
.size())
233 this->opd_ent_
.resize(ndx
+ 1);
234 this->opd_ent_
[ndx
].gc_mark
= true;
238 process_gc_mark(Symbol_table
* symtab
)
240 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
241 if (this->opd_ent_
[i
].gc_mark
)
243 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
244 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
248 // Return offset in output GOT section that this object will use
249 // as a TOC pointer. Won't be just a constant with multi-toc support.
251 toc_base_offset() const
255 set_has_small_toc_reloc()
256 { has_small_toc_reloc_
= true; }
259 has_small_toc_reloc() const
260 { return has_small_toc_reloc_
; }
263 set_has_14bit_branch(unsigned int shndx
)
265 if (shndx
>= this->has14_
.size())
266 this->has14_
.resize(shndx
+ 1);
267 this->has14_
[shndx
] = true;
271 has_14bit_branch(unsigned int shndx
) const
272 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
275 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
277 if (shndx
>= this->stub_table_index_
.size())
278 this->stub_table_index_
.resize(shndx
+ 1);
279 this->stub_table_index_
[shndx
] = stub_index
;
282 Stub_table
<size
, big_endian
>*
283 stub_table(unsigned int shndx
)
285 if (shndx
< this->stub_table_index_
.size())
287 Target_powerpc
<size
, big_endian
>* target
288 = static_cast<Target_powerpc
<size
, big_endian
>*>(
289 parameters
->sized_target
<size
, big_endian
>());
290 unsigned int indx
= this->stub_table_index_
[shndx
];
291 gold_assert(indx
< target
->stub_tables().size());
292 return target
->stub_tables()[indx
];
300 this->stub_table_index_
.clear();
305 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
307 // Set ABI version for input and output
309 set_abiversion(int ver
);
312 ppc64_local_entry_offset(const Symbol
* sym
) const
313 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
316 ppc64_local_entry_offset(unsigned int symndx
) const
317 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
328 // Return index into opd_ent_ array for .opd entry at OFF.
329 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
330 // apart when the language doesn't use the last 8-byte word, the
331 // environment pointer. Thus dividing the entry section offset by
332 // 16 will give an index into opd_ent_ that works for either layout
333 // of .opd. (It leaves some elements of the vector unused when .opd
334 // entries are spaced 24 bytes apart, but we don't know the spacing
335 // until relocations are processed, and in any case it is possible
336 // for an object to have some entries spaced 16 bytes apart and
337 // others 24 bytes apart.)
339 opd_ent_ndx(size_t off
) const
342 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
343 unsigned int special_
;
345 // For 64-bit, whether this object uses small model relocs to access
347 bool has_small_toc_reloc_
;
349 // Set at the start of gc_process_relocs, when we know opd_ent_
350 // vector is valid. The flag could be made atomic and set in
351 // do_read_relocs with memory_order_release and then tested with
352 // memory_order_acquire, potentially resulting in fewer entries in
356 // The first 8-byte word of an OPD entry gives the address of the
357 // entry point of the function. Relocatable object files have a
358 // relocation on this word. The following vector records the
359 // section and offset specified by these relocations.
360 std::vector
<Opd_ent
> opd_ent_
;
362 // References made to this object's .opd section when running
363 // gc_process_relocs for another object, before the opd_ent_ vector
364 // is valid for this object.
365 Access_from access_from_map_
;
367 // Whether input section has a 14-bit branch reloc.
368 std::vector
<bool> has14_
;
370 // The stub table to use for a given input section.
371 std::vector
<unsigned int> stub_table_index_
;
374 elfcpp::Elf_Word e_flags_
;
376 // ELF st_other field for local symbols.
377 std::vector
<unsigned char> st_other_
;
380 template<int size
, bool big_endian
>
381 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
384 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
386 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
387 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
388 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
389 opd_shndx_(0), opd_ent_(), e_flags_(ehdr
.get_e_flags())
391 this->set_abiversion(0);
397 // Call Sized_dynobj::do_read_symbols to read the symbols then
398 // read .opd from a dynamic object, filling in opd_ent_ vector,
400 do_read_symbols(Read_symbols_data
*);
402 // The .opd section shndx.
406 return this->opd_shndx_
;
409 // The .opd section address.
413 return this->opd_address_
;
416 // Init OPD entry arrays.
418 init_opd(size_t opd_size
)
420 size_t count
= this->opd_ent_ndx(opd_size
);
421 this->opd_ent_
.resize(count
);
424 // Return section and offset of function entry for .opd + R_OFF.
426 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
428 size_t ndx
= this->opd_ent_ndx(r_off
);
429 gold_assert(ndx
< this->opd_ent_
.size());
430 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
432 *value
= this->opd_ent_
[ndx
].off
;
433 return this->opd_ent_
[ndx
].shndx
;
436 // Set section and offset of function entry for .opd + R_OFF.
438 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
440 size_t ndx
= this->opd_ent_ndx(r_off
);
441 gold_assert(ndx
< this->opd_ent_
.size());
442 this->opd_ent_
[ndx
].shndx
= shndx
;
443 this->opd_ent_
[ndx
].off
= value
;
448 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
450 // Set ABI version for input and output.
452 set_abiversion(int ver
);
455 // Used to specify extent of executable sections.
458 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
459 : start(start_
), len(len_
), shndx(shndx_
)
463 operator<(const Sec_info
& that
) const
464 { return this->start
< that
.start
; }
477 // Return index into opd_ent_ array for .opd entry at OFF.
479 opd_ent_ndx(size_t off
) const
482 // For 64-bit the .opd section shndx and address.
483 unsigned int opd_shndx_
;
484 Address opd_address_
;
486 // The first 8-byte word of an OPD entry gives the address of the
487 // entry point of the function. Records the section and offset
488 // corresponding to the address. Note that in dynamic objects,
489 // offset is *not* relative to the section.
490 std::vector
<Opd_ent
> opd_ent_
;
493 elfcpp::Elf_Word e_flags_
;
496 template<int size
, bool big_endian
>
497 class Target_powerpc
: public Sized_target
<size
, big_endian
>
501 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
502 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
503 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
504 static const Address invalid_address
= static_cast<Address
>(0) - 1;
505 // Offset of tp and dtp pointers from start of TLS block.
506 static const Address tp_offset
= 0x7000;
507 static const Address dtp_offset
= 0x8000;
510 : Sized_target
<size
, big_endian
>(&powerpc_info
),
511 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
512 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
513 tlsld_got_offset_(-1U),
514 stub_tables_(), branch_lookup_table_(), branch_info_(),
515 plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0),
516 stub_group_size_(0), savres_section_(0)
520 // Process the relocations to determine unreferenced sections for
521 // garbage collection.
523 gc_process_relocs(Symbol_table
* symtab
,
525 Sized_relobj_file
<size
, big_endian
>* object
,
526 unsigned int data_shndx
,
527 unsigned int sh_type
,
528 const unsigned char* prelocs
,
530 Output_section
* output_section
,
531 bool needs_special_offset_handling
,
532 size_t local_symbol_count
,
533 const unsigned char* plocal_symbols
);
535 // Scan the relocations to look for symbol adjustments.
537 scan_relocs(Symbol_table
* symtab
,
539 Sized_relobj_file
<size
, big_endian
>* object
,
540 unsigned int data_shndx
,
541 unsigned int sh_type
,
542 const unsigned char* prelocs
,
544 Output_section
* output_section
,
545 bool needs_special_offset_handling
,
546 size_t local_symbol_count
,
547 const unsigned char* plocal_symbols
);
549 // Map input .toc section to output .got section.
551 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
553 if (size
== 64 && strcmp(name
, ".toc") == 0)
561 // Provide linker defined save/restore functions.
563 define_save_restore_funcs(Layout
*, Symbol_table
*);
565 // No stubs unless a final link.
568 { return !parameters
->options().relocatable(); }
571 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
574 do_plt_fde_location(const Output_data
*, unsigned char*,
575 uint64_t*, off_t
*) const;
577 // Stash info about branches, for stub generation.
579 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
580 unsigned int data_shndx
, Address r_offset
,
581 unsigned int r_type
, unsigned int r_sym
, Address addend
)
583 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
584 this->branch_info_
.push_back(info
);
585 if (r_type
== elfcpp::R_POWERPC_REL14
586 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
587 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
588 ppc_object
->set_has_14bit_branch(data_shndx
);
592 do_define_standard_symbols(Symbol_table
*, Layout
*);
594 // Finalize the sections.
596 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
598 // Return the value to use for a dynamic which requires special
601 do_dynsym_value(const Symbol
*) const;
603 // Return the PLT address to use for a local symbol.
605 do_plt_address_for_local(const Relobj
*, unsigned int) const;
607 // Return the PLT address to use for a global symbol.
609 do_plt_address_for_global(const Symbol
*) const;
611 // Return the offset to use for the GOT_INDX'th got entry which is
612 // for a local tls symbol specified by OBJECT, SYMNDX.
614 do_tls_offset_for_local(const Relobj
* object
,
616 unsigned int got_indx
) const;
618 // Return the offset to use for the GOT_INDX'th got entry which is
619 // for global tls symbol GSYM.
621 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
624 do_function_location(Symbol_location
*) const;
627 do_can_check_for_function_pointers() const
630 // Adjust -fsplit-stack code which calls non-split-stack code.
632 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
633 section_offset_type fnoffset
, section_size_type fnsize
,
634 unsigned char* view
, section_size_type view_size
,
635 std::string
* from
, std::string
* to
) const;
637 // Relocate a section.
639 relocate_section(const Relocate_info
<size
, big_endian
>*,
640 unsigned int sh_type
,
641 const unsigned char* prelocs
,
643 Output_section
* output_section
,
644 bool needs_special_offset_handling
,
646 Address view_address
,
647 section_size_type view_size
,
648 const Reloc_symbol_changes
*);
650 // Scan the relocs during a relocatable link.
652 scan_relocatable_relocs(Symbol_table
* symtab
,
654 Sized_relobj_file
<size
, big_endian
>* object
,
655 unsigned int data_shndx
,
656 unsigned int sh_type
,
657 const unsigned char* prelocs
,
659 Output_section
* output_section
,
660 bool needs_special_offset_handling
,
661 size_t local_symbol_count
,
662 const unsigned char* plocal_symbols
,
663 Relocatable_relocs
*);
665 // Emit relocations for a section.
667 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
668 unsigned int sh_type
,
669 const unsigned char* prelocs
,
671 Output_section
* output_section
,
672 typename
elfcpp::Elf_types
<size
>::Elf_Off
673 offset_in_output_section
,
674 const Relocatable_relocs
*,
676 Address view_address
,
678 unsigned char* reloc_view
,
679 section_size_type reloc_view_size
);
681 // Return whether SYM is defined by the ABI.
683 do_is_defined_by_abi(const Symbol
* sym
) const
685 return strcmp(sym
->name(), "__tls_get_addr") == 0;
688 // Return the size of the GOT section.
692 gold_assert(this->got_
!= NULL
);
693 return this->got_
->data_size();
696 // Get the PLT section.
697 const Output_data_plt_powerpc
<size
, big_endian
>*
700 gold_assert(this->plt_
!= NULL
);
704 // Get the IPLT section.
705 const Output_data_plt_powerpc
<size
, big_endian
>*
708 gold_assert(this->iplt_
!= NULL
);
712 // Get the .glink section.
713 const Output_data_glink
<size
, big_endian
>*
714 glink_section() const
716 gold_assert(this->glink_
!= NULL
);
720 Output_data_glink
<size
, big_endian
>*
723 gold_assert(this->glink_
!= NULL
);
727 bool has_glink() const
728 { return this->glink_
!= NULL
; }
730 // Get the GOT section.
731 const Output_data_got_powerpc
<size
, big_endian
>*
734 gold_assert(this->got_
!= NULL
);
738 // Get the GOT section, creating it if necessary.
739 Output_data_got_powerpc
<size
, big_endian
>*
740 got_section(Symbol_table
*, Layout
*);
743 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
744 const elfcpp::Ehdr
<size
, big_endian
>&);
746 // Return the number of entries in the GOT.
748 got_entry_count() const
750 if (this->got_
== NULL
)
752 return this->got_size() / (size
/ 8);
755 // Return the number of entries in the PLT.
757 plt_entry_count() const;
759 // Return the offset of the first non-reserved PLT entry.
761 first_plt_entry_offset() const
765 if (this->abiversion() >= 2)
770 // Return the size of each PLT entry.
772 plt_entry_size() const
776 if (this->abiversion() >= 2)
781 Output_data_save_res
<size
, big_endian
>*
782 savres_section() const
784 return this->savres_section_
;
787 // Add any special sections for this symbol to the gc work list.
788 // For powerpc64, this adds the code section of a function
791 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
793 // Handle target specific gc actions when adding a gc reference from
794 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
795 // and DST_OFF. For powerpc64, this adds a referenc to the code
796 // section of a function descriptor.
798 do_gc_add_reference(Symbol_table
* symtab
,
800 unsigned int src_shndx
,
802 unsigned int dst_shndx
,
803 Address dst_off
) const;
805 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
808 { return this->stub_tables_
; }
810 const Output_data_brlt_powerpc
<size
, big_endian
>*
812 { return this->brlt_section_
; }
815 add_branch_lookup_table(Address to
)
817 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
818 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
822 find_branch_lookup_table(Address to
)
824 typename
Branch_lookup_table::const_iterator p
825 = this->branch_lookup_table_
.find(to
);
826 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
830 write_branch_lookup_table(unsigned char *oview
)
832 for (typename
Branch_lookup_table::const_iterator p
833 = this->branch_lookup_table_
.begin();
834 p
!= this->branch_lookup_table_
.end();
837 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
842 plt_thread_safe() const
843 { return this->plt_thread_safe_
; }
847 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
850 set_abiversion (int ver
)
852 elfcpp::Elf_Word flags
= this->processor_specific_flags();
853 flags
&= ~elfcpp::EF_PPC64_ABI
;
854 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
855 this->set_processor_specific_flags(flags
);
858 // Offset to to save stack slot
861 { return this->abiversion() < 2 ? 40 : 24; }
877 : tls_get_addr_(NOT_EXPECTED
),
878 relinfo_(NULL
), relnum_(0), r_offset_(0)
883 if (this->tls_get_addr_
!= NOT_EXPECTED
)
890 if (this->relinfo_
!= NULL
)
891 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
892 _("missing expected __tls_get_addr call"));
896 expect_tls_get_addr_call(
897 const Relocate_info
<size
, big_endian
>* relinfo
,
901 this->tls_get_addr_
= EXPECTED
;
902 this->relinfo_
= relinfo
;
903 this->relnum_
= relnum
;
904 this->r_offset_
= r_offset
;
908 expect_tls_get_addr_call()
909 { this->tls_get_addr_
= EXPECTED
; }
912 skip_next_tls_get_addr_call()
913 {this->tls_get_addr_
= SKIP
; }
916 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
918 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
919 || r_type
== elfcpp::R_PPC_PLTREL24
)
921 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
922 Tls_get_addr last_tls
= this->tls_get_addr_
;
923 this->tls_get_addr_
= NOT_EXPECTED
;
924 if (is_tls_call
&& last_tls
!= EXPECTED
)
926 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
935 // What we're up to regarding calls to __tls_get_addr.
936 // On powerpc, the branch and link insn making a call to
937 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
938 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
939 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
940 // The marker relocation always comes first, and has the same
941 // symbol as the reloc on the insn setting up the __tls_get_addr
942 // argument. This ties the arg setup insn with the call insn,
943 // allowing ld to safely optimize away the call. We check that
944 // every call to __tls_get_addr has a marker relocation, and that
945 // every marker relocation is on a call to __tls_get_addr.
946 Tls_get_addr tls_get_addr_
;
947 // Info about the last reloc for error message.
948 const Relocate_info
<size
, big_endian
>* relinfo_
;
953 // The class which scans relocations.
954 class Scan
: protected Track_tls
957 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
960 : Track_tls(), issued_non_pic_error_(false)
964 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
967 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
968 Sized_relobj_file
<size
, big_endian
>* object
,
969 unsigned int data_shndx
,
970 Output_section
* output_section
,
971 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
972 const elfcpp::Sym
<size
, big_endian
>& lsym
,
976 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
977 Sized_relobj_file
<size
, big_endian
>* object
,
978 unsigned int data_shndx
,
979 Output_section
* output_section
,
980 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
984 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
986 Sized_relobj_file
<size
, big_endian
>* relobj
,
989 const elfcpp::Rela
<size
, big_endian
>& ,
991 const elfcpp::Sym
<size
, big_endian
>&)
993 // PowerPC64 .opd is not folded, so any identical function text
994 // may be folded and we'll still keep function addresses distinct.
995 // That means no reloc is of concern here.
998 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
999 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1000 if (ppcobj
->abiversion() == 1)
1003 // For 32-bit and ELFv2, conservatively assume anything but calls to
1004 // function code might be taking the address of the function.
1005 return !is_branch_reloc(r_type
);
1009 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1011 Sized_relobj_file
<size
, big_endian
>* relobj
,
1014 const elfcpp::Rela
<size
, big_endian
>& ,
1015 unsigned int r_type
,
1021 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1022 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1023 if (ppcobj
->abiversion() == 1)
1026 return !is_branch_reloc(r_type
);
1030 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1031 Sized_relobj_file
<size
, big_endian
>* object
,
1032 unsigned int r_type
, bool report_err
);
1036 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1037 unsigned int r_type
);
1040 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1041 unsigned int r_type
, Symbol
*);
1044 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1045 Target_powerpc
* target
);
1048 check_non_pic(Relobj
*, unsigned int r_type
);
1050 // Whether we have issued an error about a non-PIC compilation.
1051 bool issued_non_pic_error_
;
1055 symval_for_branch(const Symbol_table
* symtab
,
1056 const Sized_symbol
<size
>* gsym
,
1057 Powerpc_relobj
<size
, big_endian
>* object
,
1058 Address
*value
, unsigned int *dest_shndx
);
1060 // The class which implements relocation.
1061 class Relocate
: protected Track_tls
1064 // Use 'at' branch hints when true, 'y' when false.
1065 // FIXME maybe: set this with an option.
1066 static const bool is_isa_v2
= true;
1072 // Do a relocation. Return false if the caller should not issue
1073 // any warnings about this relocation.
1075 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
1076 Output_section
*, size_t relnum
,
1077 const elfcpp::Rela
<size
, big_endian
>&,
1078 unsigned int r_type
, const Sized_symbol
<size
>*,
1079 const Symbol_value
<size
>*,
1081 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1085 class Relocate_comdat_behavior
1088 // Decide what the linker should do for relocations that refer to
1089 // discarded comdat sections.
1090 inline Comdat_behavior
1091 get(const char* name
)
1093 gold::Default_comdat_behavior default_behavior
;
1094 Comdat_behavior ret
= default_behavior
.get(name
);
1095 if (ret
== CB_WARNING
)
1098 && (strcmp(name
, ".fixup") == 0
1099 || strcmp(name
, ".got2") == 0))
1102 && (strcmp(name
, ".opd") == 0
1103 || strcmp(name
, ".toc") == 0
1104 || strcmp(name
, ".toc1") == 0))
1111 // A class which returns the size required for a relocation type,
1112 // used while scanning relocs during a relocatable link.
1113 class Relocatable_size_for_reloc
1117 get_size_for_reloc(unsigned int, Relobj
*)
1124 // Optimize the TLS relocation type based on what we know about the
1125 // symbol. IS_FINAL is true if the final address of this symbol is
1126 // known at link time.
1128 tls::Tls_optimization
1129 optimize_tls_gd(bool is_final
)
1131 // If we are generating a shared library, then we can't do anything
1133 if (parameters
->options().shared())
1134 return tls::TLSOPT_NONE
;
1137 return tls::TLSOPT_TO_IE
;
1138 return tls::TLSOPT_TO_LE
;
1141 tls::Tls_optimization
1144 if (parameters
->options().shared())
1145 return tls::TLSOPT_NONE
;
1147 return tls::TLSOPT_TO_LE
;
1150 tls::Tls_optimization
1151 optimize_tls_ie(bool is_final
)
1153 if (!is_final
|| parameters
->options().shared())
1154 return tls::TLSOPT_NONE
;
1156 return tls::TLSOPT_TO_LE
;
1161 make_glink_section(Layout
*);
1163 // Create the PLT section.
1165 make_plt_section(Symbol_table
*, Layout
*);
1168 make_iplt_section(Symbol_table
*, Layout
*);
1171 make_brlt_section(Layout
*);
1173 // Create a PLT entry for a global symbol.
1175 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1177 // Create a PLT entry for a local IFUNC symbol.
1179 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1180 Sized_relobj_file
<size
, big_endian
>*,
1184 // Create a GOT entry for local dynamic __tls_get_addr.
1186 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1187 Sized_relobj_file
<size
, big_endian
>* object
);
1190 tlsld_got_offset() const
1192 return this->tlsld_got_offset_
;
1195 // Get the dynamic reloc section, creating it if necessary.
1197 rela_dyn_section(Layout
*);
1199 // Similarly, but for ifunc symbols get the one for ifunc.
1201 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1203 // Copy a relocation against a global symbol.
1205 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1206 Sized_relobj_file
<size
, big_endian
>* object
,
1207 unsigned int shndx
, Output_section
* output_section
,
1208 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1210 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1211 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1212 symtab
->get_sized_symbol
<size
>(sym
),
1213 object
, shndx
, output_section
,
1214 r_type
, reloc
.get_r_offset(),
1215 reloc
.get_r_addend(),
1216 this->rela_dyn_section(layout
));
1219 // Look over all the input sections, deciding where to place stubs.
1221 group_sections(Layout
*, const Task
*, bool);
1223 // Sort output sections by address.
1224 struct Sort_sections
1227 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1228 { return sec1
->address() < sec2
->address(); }
1234 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1235 unsigned int data_shndx
,
1237 unsigned int r_type
,
1240 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1241 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1247 // If this branch needs a plt call stub, or a long branch stub, make one.
1249 make_stub(Stub_table
<size
, big_endian
>*,
1250 Stub_table
<size
, big_endian
>*,
1251 Symbol_table
*) const;
1254 // The branch location..
1255 Powerpc_relobj
<size
, big_endian
>* object_
;
1256 unsigned int shndx_
;
1258 // ..and the branch type and destination.
1259 unsigned int r_type_
;
1260 unsigned int r_sym_
;
1264 // Information about this specific target which we pass to the
1265 // general Target structure.
1266 static Target::Target_info powerpc_info
;
1268 // The types of GOT entries needed for this platform.
1269 // These values are exposed to the ABI in an incremental link.
1270 // Do not renumber existing values without changing the version
1271 // number of the .gnu_incremental_inputs section.
1275 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1276 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1277 GOT_TYPE_TPREL
// entry for @got@tprel
1281 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1282 // The PLT section. This is a container for a table of addresses,
1283 // and their relocations. Each address in the PLT has a dynamic
1284 // relocation (R_*_JMP_SLOT) and each address will have a
1285 // corresponding entry in .glink for lazy resolution of the PLT.
1286 // ppc32 initialises the PLT to point at the .glink entry, while
1287 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1288 // linker adds a stub that loads the PLT entry into ctr then
1289 // branches to ctr. There may be more than one stub for each PLT
1290 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1291 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1292 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1293 // The IPLT section. Like plt_, this is a container for a table of
1294 // addresses and their relocations, specifically for STT_GNU_IFUNC
1295 // functions that resolve locally (STT_GNU_IFUNC functions that
1296 // don't resolve locally go in PLT). Unlike plt_, these have no
1297 // entry in .glink for lazy resolution, and the relocation section
1298 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1299 // the relocation section may contain relocations against
1300 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1301 // relocation section will appear at the end of other dynamic
1302 // relocations, so that ld.so applies these relocations after other
1303 // dynamic relocations. In a static executable, the relocation
1304 // section is emitted and marked with __rela_iplt_start and
1305 // __rela_iplt_end symbols.
1306 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1307 // Section holding long branch destinations.
1308 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1309 // The .glink section.
1310 Output_data_glink
<size
, big_endian
>* glink_
;
1311 // The dynamic reloc section.
1312 Reloc_section
* rela_dyn_
;
1313 // Relocs saved to avoid a COPY reloc.
1314 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1315 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1316 unsigned int tlsld_got_offset_
;
1318 Stub_tables stub_tables_
;
1319 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1320 Branch_lookup_table branch_lookup_table_
;
1322 typedef std::vector
<Branch_info
> Branches
;
1323 Branches branch_info_
;
1325 bool plt_thread_safe_
;
1328 int relax_fail_count_
;
1329 int32_t stub_group_size_
;
1331 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1335 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1338 true, // is_big_endian
1339 elfcpp::EM_PPC
, // machine_code
1340 false, // has_make_symbol
1341 false, // has_resolve
1342 false, // has_code_fill
1343 true, // is_default_stack_executable
1344 false, // can_icf_inline_merge_sections
1346 "/usr/lib/ld.so.1", // dynamic_linker
1347 0x10000000, // default_text_segment_address
1348 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1349 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1350 false, // isolate_execinstr
1352 elfcpp::SHN_UNDEF
, // small_common_shndx
1353 elfcpp::SHN_UNDEF
, // large_common_shndx
1354 0, // small_common_section_flags
1355 0, // large_common_section_flags
1356 NULL
, // attributes_section
1357 NULL
, // attributes_vendor
1358 "_start", // entry_symbol_name
1359 32, // hash_entry_size
1363 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1366 false, // is_big_endian
1367 elfcpp::EM_PPC
, // machine_code
1368 false, // has_make_symbol
1369 false, // has_resolve
1370 false, // has_code_fill
1371 true, // is_default_stack_executable
1372 false, // can_icf_inline_merge_sections
1374 "/usr/lib/ld.so.1", // dynamic_linker
1375 0x10000000, // default_text_segment_address
1376 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1377 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1378 false, // isolate_execinstr
1380 elfcpp::SHN_UNDEF
, // small_common_shndx
1381 elfcpp::SHN_UNDEF
, // large_common_shndx
1382 0, // small_common_section_flags
1383 0, // large_common_section_flags
1384 NULL
, // attributes_section
1385 NULL
, // attributes_vendor
1386 "_start", // entry_symbol_name
1387 32, // hash_entry_size
1391 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1394 true, // is_big_endian
1395 elfcpp::EM_PPC64
, // machine_code
1396 false, // has_make_symbol
1397 false, // has_resolve
1398 false, // has_code_fill
1399 true, // is_default_stack_executable
1400 false, // can_icf_inline_merge_sections
1402 "/usr/lib/ld.so.1", // dynamic_linker
1403 0x10000000, // default_text_segment_address
1404 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1405 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1406 false, // isolate_execinstr
1408 elfcpp::SHN_UNDEF
, // small_common_shndx
1409 elfcpp::SHN_UNDEF
, // large_common_shndx
1410 0, // small_common_section_flags
1411 0, // large_common_section_flags
1412 NULL
, // attributes_section
1413 NULL
, // attributes_vendor
1414 "_start", // entry_symbol_name
1415 32, // hash_entry_size
1419 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1422 false, // is_big_endian
1423 elfcpp::EM_PPC64
, // machine_code
1424 false, // has_make_symbol
1425 false, // has_resolve
1426 false, // has_code_fill
1427 true, // is_default_stack_executable
1428 false, // can_icf_inline_merge_sections
1430 "/usr/lib/ld.so.1", // dynamic_linker
1431 0x10000000, // default_text_segment_address
1432 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1433 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1434 false, // isolate_execinstr
1436 elfcpp::SHN_UNDEF
, // small_common_shndx
1437 elfcpp::SHN_UNDEF
, // large_common_shndx
1438 0, // small_common_section_flags
1439 0, // large_common_section_flags
1440 NULL
, // attributes_section
1441 NULL
, // attributes_vendor
1442 "_start", // entry_symbol_name
1443 32, // hash_entry_size
1447 is_branch_reloc(unsigned int r_type
)
1449 return (r_type
== elfcpp::R_POWERPC_REL24
1450 || r_type
== elfcpp::R_PPC_PLTREL24
1451 || r_type
== elfcpp::R_PPC_LOCAL24PC
1452 || r_type
== elfcpp::R_POWERPC_REL14
1453 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1454 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1455 || r_type
== elfcpp::R_POWERPC_ADDR24
1456 || r_type
== elfcpp::R_POWERPC_ADDR14
1457 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1458 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1461 // If INSN is an opcode that may be used with an @tls operand, return
1462 // the transformed insn for TLS optimisation, otherwise return 0. If
1463 // REG is non-zero only match an insn with RB or RA equal to REG.
1465 at_tls_transform(uint32_t insn
, unsigned int reg
)
1467 if ((insn
& (0x3f << 26)) != 31 << 26)
1471 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1472 rtra
= insn
& ((1 << 26) - (1 << 16));
1473 else if (((insn
>> 16) & 0x1f) == reg
)
1474 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1478 if ((insn
& (0x3ff << 1)) == 266 << 1)
1481 else if ((insn
& (0x1f << 1)) == 23 << 1
1482 && ((insn
& (0x1f << 6)) < 14 << 6
1483 || ((insn
& (0x1f << 6)) >= 16 << 6
1484 && (insn
& (0x1f << 6)) < 24 << 6)))
1485 // load and store indexed -> dform
1486 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1487 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1488 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1489 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1490 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1492 insn
= (58 << 26) | 2;
1500 template<int size
, bool big_endian
>
1501 class Powerpc_relocate_functions
1521 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1522 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1524 template<int valsize
>
1526 has_overflow_signed(Address value
)
1528 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1529 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1530 limit
<<= ((valsize
- 1) >> 1);
1531 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1532 return value
+ limit
> (limit
<< 1) - 1;
1535 template<int valsize
>
1537 has_overflow_unsigned(Address value
)
1539 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1540 limit
<<= ((valsize
- 1) >> 1);
1541 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1542 return value
> (limit
<< 1) - 1;
1545 template<int valsize
>
1547 has_overflow_bitfield(Address value
)
1549 return (has_overflow_unsigned
<valsize
>(value
)
1550 && has_overflow_signed
<valsize
>(value
));
1553 template<int valsize
>
1554 static inline Status
1555 overflowed(Address value
, Overflow_check overflow
)
1557 if (overflow
== CHECK_SIGNED
)
1559 if (has_overflow_signed
<valsize
>(value
))
1560 return STATUS_OVERFLOW
;
1562 else if (overflow
== CHECK_UNSIGNED
)
1564 if (has_overflow_unsigned
<valsize
>(value
))
1565 return STATUS_OVERFLOW
;
1567 else if (overflow
== CHECK_BITFIELD
)
1569 if (has_overflow_bitfield
<valsize
>(value
))
1570 return STATUS_OVERFLOW
;
1575 // Do a simple RELA relocation
1576 template<int fieldsize
, int valsize
>
1577 static inline Status
1578 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1580 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1581 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1582 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1583 return overflowed
<valsize
>(value
, overflow
);
1586 template<int fieldsize
, int valsize
>
1587 static inline Status
1588 rela(unsigned char* view
,
1589 unsigned int right_shift
,
1590 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1592 Overflow_check overflow
)
1594 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1595 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1596 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1597 Valtype reloc
= value
>> right_shift
;
1600 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1601 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1604 // Do a simple RELA relocation, unaligned.
1605 template<int fieldsize
, int valsize
>
1606 static inline Status
1607 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1609 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1610 return overflowed
<valsize
>(value
, overflow
);
1613 template<int fieldsize
, int valsize
>
1614 static inline Status
1615 rela_ua(unsigned char* view
,
1616 unsigned int right_shift
,
1617 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1619 Overflow_check overflow
)
1621 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1623 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1624 Valtype reloc
= value
>> right_shift
;
1627 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1628 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1632 // R_PPC64_ADDR64: (Symbol + Addend)
1634 addr64(unsigned char* view
, Address value
)
1635 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1637 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1639 addr64_u(unsigned char* view
, Address value
)
1640 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1642 // R_POWERPC_ADDR32: (Symbol + Addend)
1643 static inline Status
1644 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1645 { return This::template rela
<32,32>(view
, value
, overflow
); }
1647 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1648 static inline Status
1649 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1650 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1652 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1653 static inline Status
1654 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1656 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1658 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1659 stat
= STATUS_OVERFLOW
;
1663 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1664 static inline Status
1665 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1666 { return This::template rela
<16,16>(view
, value
, overflow
); }
1668 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1669 static inline Status
1670 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1671 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1673 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1674 static inline Status
1675 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1677 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1678 if ((value
& 3) != 0)
1679 stat
= STATUS_OVERFLOW
;
1683 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1685 addr16_hi(unsigned char* view
, Address value
)
1686 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1688 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1690 addr16_ha(unsigned char* view
, Address value
)
1691 { This::addr16_hi(view
, value
+ 0x8000); }
1693 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1695 addr16_hi2(unsigned char* view
, Address value
)
1696 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1698 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1700 addr16_ha2(unsigned char* view
, Address value
)
1701 { This::addr16_hi2(view
, value
+ 0x8000); }
1703 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1705 addr16_hi3(unsigned char* view
, Address value
)
1706 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1708 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1710 addr16_ha3(unsigned char* view
, Address value
)
1711 { This::addr16_hi3(view
, value
+ 0x8000); }
1713 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1714 static inline Status
1715 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1717 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1718 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1719 stat
= STATUS_OVERFLOW
;
1724 // Set ABI version for input and output.
1726 template<int size
, bool big_endian
>
1728 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1730 this->e_flags_
|= ver
;
1731 if (this->abiversion() != 0)
1733 Target_powerpc
<size
, big_endian
>* target
=
1734 static_cast<Target_powerpc
<size
, big_endian
>*>(
1735 parameters
->sized_target
<size
, big_endian
>());
1736 if (target
->abiversion() == 0)
1737 target
->set_abiversion(this->abiversion());
1738 else if (target
->abiversion() != this->abiversion())
1739 gold_error(_("%s: ABI version %d is not compatible "
1740 "with ABI version %d output"),
1741 this->name().c_str(),
1742 this->abiversion(), target
->abiversion());
1747 // Stash away the index of .got2 or .opd in a relocatable object, if
1748 // such a section exists.
1750 template<int size
, bool big_endian
>
1752 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1753 Read_symbols_data
* sd
)
1755 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1756 const unsigned char* namesu
= sd
->section_names
->data();
1757 const char* names
= reinterpret_cast<const char*>(namesu
);
1758 section_size_type names_size
= sd
->section_names_size
;
1759 const unsigned char* s
;
1761 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1762 size
== 32 ? ".got2" : ".opd",
1763 names
, names_size
, NULL
);
1766 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1767 this->special_
= ndx
;
1770 if (this->abiversion() == 0)
1771 this->set_abiversion(1);
1772 else if (this->abiversion() > 1)
1773 gold_error(_("%s: .opd invalid in abiv%d"),
1774 this->name().c_str(), this->abiversion());
1777 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1780 // Examine .rela.opd to build info about function entry points.
1782 template<int size
, bool big_endian
>
1784 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1786 const unsigned char* prelocs
,
1787 const unsigned char* plocal_syms
)
1791 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1793 const int reloc_size
1794 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1795 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1796 Address expected_off
= 0;
1797 bool regular
= true;
1798 unsigned int opd_ent_size
= 0;
1800 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1802 Reltype
reloc(prelocs
);
1803 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1804 = reloc
.get_r_info();
1805 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1806 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1808 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1809 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1812 if (r_sym
< this->local_symbol_count())
1814 typename
elfcpp::Sym
<size
, big_endian
>
1815 lsym(plocal_syms
+ r_sym
* sym_size
);
1816 shndx
= lsym
.get_st_shndx();
1817 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1818 value
= lsym
.get_st_value();
1821 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1823 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1824 value
+ reloc
.get_r_addend());
1827 expected_off
= reloc
.get_r_offset();
1828 opd_ent_size
= expected_off
;
1830 else if (expected_off
!= reloc
.get_r_offset())
1832 expected_off
+= opd_ent_size
;
1834 else if (r_type
== elfcpp::R_PPC64_TOC
)
1836 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1841 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1842 this->name().c_str(), r_type
);
1846 if (reloc_count
<= 2)
1847 opd_ent_size
= this->section_size(this->opd_shndx());
1848 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1852 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1853 this->name().c_str());
1859 template<int size
, bool big_endian
>
1861 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1863 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1866 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1867 p
!= rd
->relocs
.end();
1870 if (p
->data_shndx
== this->opd_shndx())
1872 uint64_t opd_size
= this->section_size(this->opd_shndx());
1873 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1876 this->init_opd(opd_size
);
1877 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1878 rd
->local_symbols
->data());
1886 // Read the symbols then set up st_other vector.
1888 template<int size
, bool big_endian
>
1890 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1892 this->base_read_symbols(sd
);
1895 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1896 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1897 const unsigned int loccount
= this->do_local_symbol_count();
1900 this->st_other_
.resize(loccount
);
1901 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1902 off_t locsize
= loccount
* sym_size
;
1903 const unsigned int symtab_shndx
= this->symtab_shndx();
1904 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1905 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1906 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1907 locsize
, true, false);
1909 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1911 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1912 unsigned char st_other
= sym
.get_st_other();
1913 this->st_other_
[i
] = st_other
;
1914 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1916 if (this->abiversion() == 0)
1917 this->set_abiversion(2);
1918 else if (this->abiversion() < 2)
1919 gold_error(_("%s: local symbol %d has invalid st_other"
1920 " for ABI version 1"),
1921 this->name().c_str(), i
);
1928 template<int size
, bool big_endian
>
1930 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1932 this->e_flags_
|= ver
;
1933 if (this->abiversion() != 0)
1935 Target_powerpc
<size
, big_endian
>* target
=
1936 static_cast<Target_powerpc
<size
, big_endian
>*>(
1937 parameters
->sized_target
<size
, big_endian
>());
1938 if (target
->abiversion() == 0)
1939 target
->set_abiversion(this->abiversion());
1940 else if (target
->abiversion() != this->abiversion())
1941 gold_error(_("%s: ABI version %d is not compatible "
1942 "with ABI version %d output"),
1943 this->name().c_str(),
1944 this->abiversion(), target
->abiversion());
1949 // Call Sized_dynobj::base_read_symbols to read the symbols then
1950 // read .opd from a dynamic object, filling in opd_ent_ vector,
1952 template<int size
, bool big_endian
>
1954 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1956 this->base_read_symbols(sd
);
1959 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1960 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1961 const unsigned char* namesu
= sd
->section_names
->data();
1962 const char* names
= reinterpret_cast<const char*>(namesu
);
1963 const unsigned char* s
= NULL
;
1964 const unsigned char* opd
;
1965 section_size_type opd_size
;
1967 // Find and read .opd section.
1970 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1971 sd
->section_names_size
,
1976 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1977 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1978 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1980 if (this->abiversion() == 0)
1981 this->set_abiversion(1);
1982 else if (this->abiversion() > 1)
1983 gold_error(_("%s: .opd invalid in abiv%d"),
1984 this->name().c_str(), this->abiversion());
1986 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1987 this->opd_address_
= shdr
.get_sh_addr();
1988 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1989 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1995 // Build set of executable sections.
1996 // Using a set is probably overkill. There is likely to be only
1997 // a few executable sections, typically .init, .text and .fini,
1998 // and they are generally grouped together.
1999 typedef std::set
<Sec_info
> Exec_sections
;
2000 Exec_sections exec_sections
;
2002 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2004 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2005 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2006 && ((shdr
.get_sh_flags()
2007 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2008 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2009 && shdr
.get_sh_size() != 0)
2011 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2012 shdr
.get_sh_size(), i
));
2015 if (exec_sections
.empty())
2018 // Look over the OPD entries. This is complicated by the fact
2019 // that some binaries will use two-word entries while others
2020 // will use the standard three-word entries. In most cases
2021 // the third word (the environment pointer for languages like
2022 // Pascal) is unused and will be zero. If the third word is
2023 // used it should not be pointing into executable sections,
2025 this->init_opd(opd_size
);
2026 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2028 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2029 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2030 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2032 // Chances are that this is the third word of an OPD entry.
2034 typename
Exec_sections::const_iterator e
2035 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2036 if (e
!= exec_sections
.begin())
2039 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2041 // We have an address in an executable section.
2042 // VAL ought to be the function entry, set it up.
2043 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2044 // Skip second word of OPD entry, the TOC pointer.
2048 // If we didn't match any executable sections, we likely
2049 // have a non-zero third word in the OPD entry.
2054 // Set up some symbols.
2056 template<int size
, bool big_endian
>
2058 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2059 Symbol_table
* symtab
,
2064 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2065 // undefined when scanning relocs (and thus requires
2066 // non-relative dynamic relocs). The proper value will be
2068 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2069 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2071 Target_powerpc
<size
, big_endian
>* target
=
2072 static_cast<Target_powerpc
<size
, big_endian
>*>(
2073 parameters
->sized_target
<size
, big_endian
>());
2074 Output_data_got_powerpc
<size
, big_endian
>* got
2075 = target
->got_section(symtab
, layout
);
2076 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2077 Symbol_table::PREDEFINED
,
2081 elfcpp::STV_HIDDEN
, 0,
2085 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2086 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2087 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2089 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2091 = layout
->add_output_section_data(".sdata", 0,
2093 | elfcpp::SHF_WRITE
,
2094 sdata
, ORDER_SMALL_DATA
, false);
2095 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2096 Symbol_table::PREDEFINED
,
2097 os
, 32768, 0, elfcpp::STT_OBJECT
,
2098 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2104 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2105 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2106 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2108 Target_powerpc
<size
, big_endian
>* target
=
2109 static_cast<Target_powerpc
<size
, big_endian
>*>(
2110 parameters
->sized_target
<size
, big_endian
>());
2111 Output_data_got_powerpc
<size
, big_endian
>* got
2112 = target
->got_section(symtab
, layout
);
2113 symtab
->define_in_output_data(".TOC.", NULL
,
2114 Symbol_table::PREDEFINED
,
2118 elfcpp::STV_HIDDEN
, 0,
2124 // Set up PowerPC target specific relobj.
2126 template<int size
, bool big_endian
>
2128 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2129 const std::string
& name
,
2130 Input_file
* input_file
,
2131 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2133 int et
= ehdr
.get_e_type();
2134 // ET_EXEC files are valid input for --just-symbols/-R,
2135 // and we treat them as relocatable objects.
2136 if (et
== elfcpp::ET_REL
2137 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2139 Powerpc_relobj
<size
, big_endian
>* obj
=
2140 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2144 else if (et
== elfcpp::ET_DYN
)
2146 Powerpc_dynobj
<size
, big_endian
>* obj
=
2147 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2153 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2158 template<int size
, bool big_endian
>
2159 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2162 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2163 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2165 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2166 : Output_data_got
<size
, big_endian
>(),
2167 symtab_(symtab
), layout_(layout
),
2168 header_ent_cnt_(size
== 32 ? 3 : 1),
2169 header_index_(size
== 32 ? 0x2000 : 0)
2172 // Override all the Output_data_got methods we use so as to first call
2175 add_global(Symbol
* gsym
, unsigned int got_type
)
2177 this->reserve_ent();
2178 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2182 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2184 this->reserve_ent();
2185 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2189 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2190 { return this->add_global_plt(gsym
, got_type
); }
2193 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2194 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2196 this->reserve_ent();
2197 Output_data_got
<size
, big_endian
>::
2198 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2202 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2203 Output_data_reloc_generic
* rel_dyn
,
2204 unsigned int r_type_1
, unsigned int r_type_2
)
2206 this->reserve_ent(2);
2207 Output_data_got
<size
, big_endian
>::
2208 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2212 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2214 this->reserve_ent();
2215 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2220 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2222 this->reserve_ent();
2223 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2228 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2229 { return this->add_local_plt(object
, sym_index
, got_type
); }
2232 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2233 unsigned int got_type
,
2234 Output_data_reloc_generic
* rel_dyn
,
2235 unsigned int r_type
)
2237 this->reserve_ent(2);
2238 Output_data_got
<size
, big_endian
>::
2239 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2243 add_constant(Valtype constant
)
2245 this->reserve_ent();
2246 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2250 add_constant_pair(Valtype c1
, Valtype c2
)
2252 this->reserve_ent(2);
2253 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2256 // Offset of _GLOBAL_OFFSET_TABLE_.
2260 return this->got_offset(this->header_index_
);
2263 // Offset of base used to access the GOT/TOC.
2264 // The got/toc pointer reg will be set to this value.
2266 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2269 return this->g_o_t();
2271 return (this->output_section()->address()
2272 + object
->toc_base_offset()
2276 // Ensure our GOT has a header.
2278 set_final_data_size()
2280 if (this->header_ent_cnt_
!= 0)
2281 this->make_header();
2282 Output_data_got
<size
, big_endian
>::set_final_data_size();
2285 // First word of GOT header needs some values that are not
2286 // handled by Output_data_got so poke them in here.
2287 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2289 do_write(Output_file
* of
)
2292 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2293 val
= this->layout_
->dynamic_section()->address();
2295 val
= this->output_section()->address() + 0x8000;
2296 this->replace_constant(this->header_index_
, val
);
2297 Output_data_got
<size
, big_endian
>::do_write(of
);
2302 reserve_ent(unsigned int cnt
= 1)
2304 if (this->header_ent_cnt_
== 0)
2306 if (this->num_entries() + cnt
> this->header_index_
)
2307 this->make_header();
2313 this->header_ent_cnt_
= 0;
2314 this->header_index_
= this->num_entries();
2317 Output_data_got
<size
, big_endian
>::add_constant(0);
2318 Output_data_got
<size
, big_endian
>::add_constant(0);
2319 Output_data_got
<size
, big_endian
>::add_constant(0);
2321 // Define _GLOBAL_OFFSET_TABLE_ at the header
2322 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2325 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2326 sym
->set_value(this->g_o_t());
2329 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2330 Symbol_table::PREDEFINED
,
2331 this, this->g_o_t(), 0,
2334 elfcpp::STV_HIDDEN
, 0,
2338 Output_data_got
<size
, big_endian
>::add_constant(0);
2341 // Stashed pointers.
2342 Symbol_table
* symtab_
;
2346 unsigned int header_ent_cnt_
;
2347 // GOT header index.
2348 unsigned int header_index_
;
2351 // Get the GOT section, creating it if necessary.
2353 template<int size
, bool big_endian
>
2354 Output_data_got_powerpc
<size
, big_endian
>*
2355 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2358 if (this->got_
== NULL
)
2360 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2363 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2365 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2366 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2367 this->got_
, ORDER_DATA
, false);
2373 // Get the dynamic reloc section, creating it if necessary.
2375 template<int size
, bool big_endian
>
2376 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2377 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2379 if (this->rela_dyn_
== NULL
)
2381 gold_assert(layout
!= NULL
);
2382 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2383 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2384 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2385 ORDER_DYNAMIC_RELOCS
, false);
2387 return this->rela_dyn_
;
2390 // Similarly, but for ifunc symbols get the one for ifunc.
2392 template<int size
, bool big_endian
>
2393 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2394 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2399 return this->rela_dyn_section(layout
);
2401 if (this->iplt_
== NULL
)
2402 this->make_iplt_section(symtab
, layout
);
2403 return this->iplt_
->rel_plt();
2409 // Determine the stub group size. The group size is the absolute
2410 // value of the parameter --stub-group-size. If --stub-group-size
2411 // is passed a negative value, we restrict stubs to be always before
2412 // the stubbed branches.
2413 Stub_control(int32_t size
, bool no_size_errors
)
2414 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2415 stub14_group_size_(abs(size
) >> 10),
2416 stubs_always_before_branch_(size
< 0),
2417 suppress_size_errors_(no_size_errors
),
2418 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2422 // Return true iff input section can be handled by current stub
2425 can_add_to_stub_group(Output_section
* o
,
2426 const Output_section::Input_section
* i
,
2429 const Output_section::Input_section
*
2435 { return output_section_
; }
2438 set_output_and_owner(Output_section
* o
,
2439 const Output_section::Input_section
* i
)
2441 this->output_section_
= o
;
2449 FINDING_STUB_SECTION
,
2454 uint32_t stub_group_size_
;
2455 uint32_t stub14_group_size_
;
2456 bool stubs_always_before_branch_
;
2457 bool suppress_size_errors_
;
2458 uint64_t group_end_addr_
;
2459 const Output_section::Input_section
* owner_
;
2460 Output_section
* output_section_
;
2463 // Return true iff input section can be handled by current stub
2467 Stub_control::can_add_to_stub_group(Output_section
* o
,
2468 const Output_section::Input_section
* i
,
2472 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2473 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2475 uint64_t start_addr
= o
->address();
2478 // .init and .fini sections are pasted together to form a single
2479 // function. We can't be adding stubs in the middle of the function.
2480 this_size
= o
->data_size();
2483 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2484 this_size
= i
->data_size();
2486 uint64_t end_addr
= start_addr
+ this_size
;
2487 bool toobig
= this_size
> group_size
;
2489 if (toobig
&& !this->suppress_size_errors_
)
2490 gold_warning(_("%s:%s exceeds group size"),
2491 i
->relobj()->name().c_str(),
2492 i
->relobj()->section_name(i
->shndx()).c_str());
2494 if (this->state_
!= HAS_STUB_SECTION
2495 && (!whole_sec
|| this->output_section_
!= o
)
2496 && (this->state_
== NO_GROUP
2497 || this->group_end_addr_
- end_addr
< group_size
))
2500 this->output_section_
= o
;
2503 if (this->state_
== NO_GROUP
)
2505 this->state_
= FINDING_STUB_SECTION
;
2506 this->group_end_addr_
= end_addr
;
2508 else if (this->group_end_addr_
- start_addr
< group_size
)
2510 // Adding this section would make the group larger than GROUP_SIZE.
2511 else if (this->state_
== FINDING_STUB_SECTION
2512 && !this->stubs_always_before_branch_
2515 // But wait, there's more! Input sections up to GROUP_SIZE
2516 // bytes before the stub table can be handled by it too.
2517 this->state_
= HAS_STUB_SECTION
;
2518 this->group_end_addr_
= end_addr
;
2522 this->state_
= NO_GROUP
;
2528 // Look over all the input sections, deciding where to place stubs.
2530 template<int size
, bool big_endian
>
2532 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2534 bool no_size_errors
)
2536 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
);
2538 // Group input sections and insert stub table
2539 Stub_table_owner
* table_owner
= NULL
;
2540 std::vector
<Stub_table_owner
*> tables
;
2541 Layout::Section_list section_list
;
2542 layout
->get_executable_sections(§ion_list
);
2543 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2544 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2545 o
!= section_list
.rend();
2548 typedef Output_section::Input_section_list Input_section_list
;
2549 for (Input_section_list::const_reverse_iterator i
2550 = (*o
)->input_sections().rbegin();
2551 i
!= (*o
)->input_sections().rend();
2554 if (i
->is_input_section()
2555 || i
->is_relaxed_input_section())
2557 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2558 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2559 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2560 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2562 table_owner
->output_section
= stub_control
.output_section();
2563 table_owner
->owner
= stub_control
.owner();
2564 stub_control
.set_output_and_owner(*o
, &*i
);
2567 if (table_owner
== NULL
)
2569 table_owner
= new Stub_table_owner
;
2570 tables
.push_back(table_owner
);
2572 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2576 if (table_owner
!= NULL
)
2578 const Output_section::Input_section
* i
= stub_control
.owner();
2580 if (tables
.size() >= 2 && tables
[tables
.size() - 2]->owner
== i
)
2582 // Corner case. A new stub group was made for the first
2583 // section (last one looked at here) for some reason, but
2584 // the first section is already being used as the owner for
2585 // a stub table for following sections. Force it into that
2589 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2590 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2591 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2595 table_owner
->output_section
= stub_control
.output_section();
2596 table_owner
->owner
= i
;
2599 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2603 Stub_table
<size
, big_endian
>* stub_table
;
2605 if ((*t
)->owner
->is_input_section())
2606 stub_table
= new Stub_table
<size
, big_endian
>(this,
2607 (*t
)->output_section
,
2609 else if ((*t
)->owner
->is_relaxed_input_section())
2610 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2611 (*t
)->owner
->relaxed_input_section());
2614 this->stub_tables_
.push_back(stub_table
);
2619 static unsigned long
2620 max_branch_delta (unsigned int r_type
)
2622 if (r_type
== elfcpp::R_POWERPC_REL14
2623 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2624 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2626 if (r_type
== elfcpp::R_POWERPC_REL24
2627 || r_type
== elfcpp::R_PPC_PLTREL24
2628 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2633 // If this branch needs a plt call stub, or a long branch stub, make one.
2635 template<int size
, bool big_endian
>
2637 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2638 Stub_table
<size
, big_endian
>* stub_table
,
2639 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2640 Symbol_table
* symtab
) const
2642 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2643 if (sym
!= NULL
&& sym
->is_forwarder())
2644 sym
= symtab
->resolve_forwards(sym
);
2645 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2646 Target_powerpc
<size
, big_endian
>* target
=
2647 static_cast<Target_powerpc
<size
, big_endian
>*>(
2648 parameters
->sized_target
<size
, big_endian
>());
2650 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2651 : this->object_
->local_has_plt_offset(this->r_sym_
))
2655 && target
->abiversion() >= 2
2656 && !parameters
->options().output_is_position_independent()
2657 && !is_branch_reloc(this->r_type_
))
2658 target
->glink_section()->add_global_entry(gsym
);
2661 if (stub_table
== NULL
)
2662 stub_table
= this->object_
->stub_table(this->shndx_
);
2663 if (stub_table
== NULL
)
2665 // This is a ref from a data section to an ifunc symbol.
2666 stub_table
= ifunc_stub_table
;
2668 gold_assert(stub_table
!= NULL
);
2669 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2670 if (from
!= invalid_address
)
2671 from
+= (this->object_
->output_section(this->shndx_
)->address()
2674 return stub_table
->add_plt_call_entry(from
,
2675 this->object_
, gsym
,
2676 this->r_type_
, this->addend_
);
2678 return stub_table
->add_plt_call_entry(from
,
2679 this->object_
, this->r_sym_
,
2680 this->r_type_
, this->addend_
);
2685 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2686 if (max_branch_offset
== 0)
2688 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2689 gold_assert(from
!= invalid_address
);
2690 from
+= (this->object_
->output_section(this->shndx_
)->address()
2695 switch (gsym
->source())
2697 case Symbol::FROM_OBJECT
:
2699 Object
* symobj
= gsym
->object();
2700 if (symobj
->is_dynamic()
2701 || symobj
->pluginobj() != NULL
)
2704 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2705 if (shndx
== elfcpp::SHN_UNDEF
)
2710 case Symbol::IS_UNDEFINED
:
2716 Symbol_table::Compute_final_value_status status
;
2717 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2718 if (status
!= Symbol_table::CFVS_OK
)
2721 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2725 const Symbol_value
<size
>* psymval
2726 = this->object_
->local_symbol(this->r_sym_
);
2727 Symbol_value
<size
> symval
;
2728 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2729 typename
ObjType::Compute_final_local_value_status status
2730 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2732 if (status
!= ObjType::CFLV_OK
2733 || !symval
.has_output_value())
2735 to
= symval
.value(this->object_
, 0);
2737 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2739 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2740 to
+= this->addend_
;
2741 if (stub_table
== NULL
)
2742 stub_table
= this->object_
->stub_table(this->shndx_
);
2743 if (size
== 64 && target
->abiversion() < 2)
2745 unsigned int dest_shndx
;
2746 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2750 Address delta
= to
- from
;
2751 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2753 if (stub_table
== NULL
)
2755 gold_warning(_("%s:%s: branch in non-executable section,"
2756 " no long branch stub for you"),
2757 this->object_
->name().c_str(),
2758 this->object_
->section_name(this->shndx_
).c_str());
2761 bool save_res
= (size
== 64
2763 && gsym
->source() == Symbol::IN_OUTPUT_DATA
2764 && gsym
->output_data() == target
->savres_section());
2765 return stub_table
->add_long_branch_entry(this->object_
,
2767 from
, to
, save_res
);
2773 // Relaxation hook. This is where we do stub generation.
2775 template<int size
, bool big_endian
>
2777 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2778 const Input_objects
*,
2779 Symbol_table
* symtab
,
2783 unsigned int prev_brlt_size
= 0;
2787 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
2789 && this->abiversion() < 2
2791 && !parameters
->options().user_set_plt_thread_safe())
2793 static const char* const thread_starter
[] =
2797 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2799 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2800 "mq_notify", "create_timer",
2805 "GOMP_parallel_start",
2806 "GOMP_parallel_loop_static",
2807 "GOMP_parallel_loop_static_start",
2808 "GOMP_parallel_loop_dynamic",
2809 "GOMP_parallel_loop_dynamic_start",
2810 "GOMP_parallel_loop_guided",
2811 "GOMP_parallel_loop_guided_start",
2812 "GOMP_parallel_loop_runtime",
2813 "GOMP_parallel_loop_runtime_start",
2814 "GOMP_parallel_sections",
2815 "GOMP_parallel_sections_start",
2820 if (parameters
->options().shared())
2824 for (unsigned int i
= 0;
2825 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2828 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2829 thread_safe
= (sym
!= NULL
2831 && sym
->in_real_elf());
2837 this->plt_thread_safe_
= thread_safe
;
2842 this->stub_group_size_
= parameters
->options().stub_group_size();
2843 bool no_size_errors
= true;
2844 if (this->stub_group_size_
== 1)
2845 this->stub_group_size_
= 0x1c00000;
2846 else if (this->stub_group_size_
== -1)
2847 this->stub_group_size_
= -0x1e00000;
2849 no_size_errors
= false;
2850 this->group_sections(layout
, task
, no_size_errors
);
2852 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
2854 this->branch_lookup_table_
.clear();
2855 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2856 p
!= this->stub_tables_
.end();
2859 (*p
)->clear_stubs(true);
2861 this->stub_tables_
.clear();
2862 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
2863 gold_info(_("%s: stub group size is too large; retrying with %d"),
2864 program_name
, this->stub_group_size_
);
2865 this->group_sections(layout
, task
, true);
2868 // We need address of stub tables valid for make_stub.
2869 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2870 p
!= this->stub_tables_
.end();
2873 const Powerpc_relobj
<size
, big_endian
>* object
2874 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2875 Address off
= object
->get_output_section_offset((*p
)->shndx());
2876 gold_assert(off
!= invalid_address
);
2877 Output_section
* os
= (*p
)->output_section();
2878 (*p
)->set_address_and_size(os
, off
);
2883 // Clear plt call stubs, long branch stubs and branch lookup table.
2884 prev_brlt_size
= this->branch_lookup_table_
.size();
2885 this->branch_lookup_table_
.clear();
2886 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2887 p
!= this->stub_tables_
.end();
2890 (*p
)->clear_stubs(false);
2894 // Build all the stubs.
2895 this->relax_failed_
= false;
2896 Stub_table
<size
, big_endian
>* ifunc_stub_table
2897 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2898 Stub_table
<size
, big_endian
>* one_stub_table
2899 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2900 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2901 b
!= this->branch_info_
.end();
2904 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
2905 && !this->relax_failed_
)
2907 this->relax_failed_
= true;
2908 this->relax_fail_count_
++;
2909 if (this->relax_fail_count_
< 3)
2914 // Did anything change size?
2915 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2916 bool again
= num_huge_branches
!= prev_brlt_size
;
2917 if (size
== 64 && num_huge_branches
!= 0)
2918 this->make_brlt_section(layout
);
2919 if (size
== 64 && again
)
2920 this->brlt_section_
->set_current_size(num_huge_branches
);
2922 typedef Unordered_set
<Output_section
*> Output_sections
;
2923 Output_sections os_need_update
;
2924 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2925 p
!= this->stub_tables_
.end();
2928 if ((*p
)->size_update())
2931 (*p
)->add_eh_frame(layout
);
2932 os_need_update
.insert((*p
)->output_section());
2936 // Set output section offsets for all input sections in an output
2937 // section that just changed size. Anything past the stubs will
2939 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2940 p
!= os_need_update
.end();
2943 Output_section
* os
= *p
;
2945 typedef Output_section::Input_section_list Input_section_list
;
2946 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2947 i
!= os
->input_sections().end();
2950 off
= align_address(off
, i
->addralign());
2951 if (i
->is_input_section() || i
->is_relaxed_input_section())
2952 i
->relobj()->set_section_offset(i
->shndx(), off
);
2953 if (i
->is_relaxed_input_section())
2955 Stub_table
<size
, big_endian
>* stub_table
2956 = static_cast<Stub_table
<size
, big_endian
>*>(
2957 i
->relaxed_input_section());
2958 off
+= stub_table
->set_address_and_size(os
, off
);
2961 off
+= i
->data_size();
2963 // If .branch_lt is part of this output section, then we have
2964 // just done the offset adjustment.
2965 os
->clear_section_offsets_need_adjustment();
2970 && num_huge_branches
!= 0
2971 && parameters
->options().output_is_position_independent())
2973 // Fill in the BRLT relocs.
2974 this->brlt_section_
->reset_brlt_sizes();
2975 for (typename
Branch_lookup_table::const_iterator p
2976 = this->branch_lookup_table_
.begin();
2977 p
!= this->branch_lookup_table_
.end();
2980 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2982 this->brlt_section_
->finalize_brlt_sizes();
2987 template<int size
, bool big_endian
>
2989 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2990 unsigned char* oview
,
2994 uint64_t address
= plt
->address();
2995 off_t len
= plt
->data_size();
2997 if (plt
== this->glink_
)
2999 // See Output_data_glink::do_write() for glink contents.
3002 gold_assert(parameters
->doing_static_link());
3003 // Static linking may need stubs, to support ifunc and long
3004 // branches. We need to create an output section for
3005 // .eh_frame early in the link process, to have a place to
3006 // attach stub .eh_frame info. We also need to have
3007 // registered a CIE that matches the stub CIE. Both of
3008 // these requirements are satisfied by creating an FDE and
3009 // CIE for .glink, even though static linking will leave
3010 // .glink zero length.
3011 // ??? Hopefully generating an FDE with a zero address range
3012 // won't confuse anything that consumes .eh_frame info.
3014 else if (size
== 64)
3016 // There is one word before __glink_PLTresolve
3020 else if (parameters
->options().output_is_position_independent())
3022 // There are two FDEs for a position independent glink.
3023 // The first covers the branch table, the second
3024 // __glink_PLTresolve at the end of glink.
3025 off_t resolve_size
= this->glink_
->pltresolve_size
;
3026 if (oview
[9] == elfcpp::DW_CFA_nop
)
3027 len
-= resolve_size
;
3030 address
+= len
- resolve_size
;
3037 // Must be a stub table.
3038 const Stub_table
<size
, big_endian
>* stub_table
3039 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3040 uint64_t stub_address
= stub_table
->stub_address();
3041 len
-= stub_address
- address
;
3042 address
= stub_address
;
3045 *paddress
= address
;
3049 // A class to handle the PLT data.
3051 template<int size
, bool big_endian
>
3052 class Output_data_plt_powerpc
: public Output_section_data_build
3055 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3056 size
, big_endian
> Reloc_section
;
3058 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3059 Reloc_section
* plt_rel
,
3061 : Output_section_data_build(size
== 32 ? 4 : 8),
3067 // Add an entry to the PLT.
3072 add_ifunc_entry(Symbol
*);
3075 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3077 // Return the .rela.plt section data.
3084 // Return the number of PLT entries.
3088 if (this->current_data_size() == 0)
3090 return ((this->current_data_size() - this->first_plt_entry_offset())
3091 / this->plt_entry_size());
3096 do_adjust_output_section(Output_section
* os
)
3101 // Write to a map file.
3103 do_print_to_mapfile(Mapfile
* mapfile
) const
3104 { mapfile
->print_output_data(this, this->name_
); }
3107 // Return the offset of the first non-reserved PLT entry.
3109 first_plt_entry_offset() const
3111 // IPLT has no reserved entry.
3112 if (this->name_
[3] == 'I')
3114 return this->targ_
->first_plt_entry_offset();
3117 // Return the size of each PLT entry.
3119 plt_entry_size() const
3121 return this->targ_
->plt_entry_size();
3124 // Write out the PLT data.
3126 do_write(Output_file
*);
3128 // The reloc section.
3129 Reloc_section
* rel_
;
3130 // Allows access to .glink for do_write.
3131 Target_powerpc
<size
, big_endian
>* targ_
;
3132 // What to report in map file.
3136 // Add an entry to the PLT.
3138 template<int size
, bool big_endian
>
3140 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3142 if (!gsym
->has_plt_offset())
3144 section_size_type off
= this->current_data_size();
3146 off
+= this->first_plt_entry_offset();
3147 gsym
->set_plt_offset(off
);
3148 gsym
->set_needs_dynsym_entry();
3149 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3150 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3151 off
+= this->plt_entry_size();
3152 this->set_current_data_size(off
);
3156 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3158 template<int size
, bool big_endian
>
3160 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3162 if (!gsym
->has_plt_offset())
3164 section_size_type off
= this->current_data_size();
3165 gsym
->set_plt_offset(off
);
3166 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3167 if (size
== 64 && this->targ_
->abiversion() < 2)
3168 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3169 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3170 off
+= this->plt_entry_size();
3171 this->set_current_data_size(off
);
3175 // Add an entry for a local ifunc symbol to the IPLT.
3177 template<int size
, bool big_endian
>
3179 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3180 Sized_relobj_file
<size
, big_endian
>* relobj
,
3181 unsigned int local_sym_index
)
3183 if (!relobj
->local_has_plt_offset(local_sym_index
))
3185 section_size_type off
= this->current_data_size();
3186 relobj
->set_local_plt_offset(local_sym_index
, off
);
3187 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3188 if (size
== 64 && this->targ_
->abiversion() < 2)
3189 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3190 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3192 off
+= this->plt_entry_size();
3193 this->set_current_data_size(off
);
3197 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3198 static const uint32_t add_2_2_11
= 0x7c425a14;
3199 static const uint32_t add_3_3_2
= 0x7c631214;
3200 static const uint32_t add_3_3_13
= 0x7c636a14;
3201 static const uint32_t add_11_0_11
= 0x7d605a14;
3202 static const uint32_t add_11_2_11
= 0x7d625a14;
3203 static const uint32_t add_11_11_2
= 0x7d6b1214;
3204 static const uint32_t addi_0_12
= 0x380c0000;
3205 static const uint32_t addi_2_2
= 0x38420000;
3206 static const uint32_t addi_3_3
= 0x38630000;
3207 static const uint32_t addi_11_11
= 0x396b0000;
3208 static const uint32_t addi_12_1
= 0x39810000;
3209 static const uint32_t addi_12_12
= 0x398c0000;
3210 static const uint32_t addis_0_2
= 0x3c020000;
3211 static const uint32_t addis_0_13
= 0x3c0d0000;
3212 static const uint32_t addis_2_12
= 0x3c4c0000;
3213 static const uint32_t addis_11_2
= 0x3d620000;
3214 static const uint32_t addis_11_11
= 0x3d6b0000;
3215 static const uint32_t addis_11_30
= 0x3d7e0000;
3216 static const uint32_t addis_12_1
= 0x3d810000;
3217 static const uint32_t addis_12_2
= 0x3d820000;
3218 static const uint32_t addis_12_12
= 0x3d8c0000;
3219 static const uint32_t b
= 0x48000000;
3220 static const uint32_t bcl_20_31
= 0x429f0005;
3221 static const uint32_t bctr
= 0x4e800420;
3222 static const uint32_t blr
= 0x4e800020;
3223 static const uint32_t bnectr_p4
= 0x4ce20420;
3224 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3225 static const uint32_t cmpldi_2_0
= 0x28220000;
3226 static const uint32_t cror_15_15_15
= 0x4def7b82;
3227 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3228 static const uint32_t ld_0_1
= 0xe8010000;
3229 static const uint32_t ld_0_12
= 0xe80c0000;
3230 static const uint32_t ld_2_1
= 0xe8410000;
3231 static const uint32_t ld_2_2
= 0xe8420000;
3232 static const uint32_t ld_2_11
= 0xe84b0000;
3233 static const uint32_t ld_11_2
= 0xe9620000;
3234 static const uint32_t ld_11_11
= 0xe96b0000;
3235 static const uint32_t ld_12_2
= 0xe9820000;
3236 static const uint32_t ld_12_11
= 0xe98b0000;
3237 static const uint32_t ld_12_12
= 0xe98c0000;
3238 static const uint32_t lfd_0_1
= 0xc8010000;
3239 static const uint32_t li_0_0
= 0x38000000;
3240 static const uint32_t li_12_0
= 0x39800000;
3241 static const uint32_t lis_0
= 0x3c000000;
3242 static const uint32_t lis_11
= 0x3d600000;
3243 static const uint32_t lis_12
= 0x3d800000;
3244 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3245 static const uint32_t lwz_0_12
= 0x800c0000;
3246 static const uint32_t lwz_11_11
= 0x816b0000;
3247 static const uint32_t lwz_11_30
= 0x817e0000;
3248 static const uint32_t lwz_12_12
= 0x818c0000;
3249 static const uint32_t lwzu_0_12
= 0x840c0000;
3250 static const uint32_t mflr_0
= 0x7c0802a6;
3251 static const uint32_t mflr_11
= 0x7d6802a6;
3252 static const uint32_t mflr_12
= 0x7d8802a6;
3253 static const uint32_t mtctr_0
= 0x7c0903a6;
3254 static const uint32_t mtctr_11
= 0x7d6903a6;
3255 static const uint32_t mtctr_12
= 0x7d8903a6;
3256 static const uint32_t mtlr_0
= 0x7c0803a6;
3257 static const uint32_t mtlr_12
= 0x7d8803a6;
3258 static const uint32_t nop
= 0x60000000;
3259 static const uint32_t ori_0_0_0
= 0x60000000;
3260 static const uint32_t srdi_0_0_2
= 0x7800f082;
3261 static const uint32_t std_0_1
= 0xf8010000;
3262 static const uint32_t std_0_12
= 0xf80c0000;
3263 static const uint32_t std_2_1
= 0xf8410000;
3264 static const uint32_t stfd_0_1
= 0xd8010000;
3265 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3266 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3267 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3268 static const uint32_t xor_2_12_12
= 0x7d826278;
3269 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3271 // Write out the PLT.
3273 template<int size
, bool big_endian
>
3275 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3277 if (size
== 32 && this->name_
[3] != 'I')
3279 const section_size_type offset
= this->offset();
3280 const section_size_type oview_size
3281 = convert_to_section_size_type(this->data_size());
3282 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3283 unsigned char* pov
= oview
;
3284 unsigned char* endpov
= oview
+ oview_size
;
3286 // The address of the .glink branch table
3287 const Output_data_glink
<size
, big_endian
>* glink
3288 = this->targ_
->glink_section();
3289 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3291 while (pov
< endpov
)
3293 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3298 of
->write_output_view(offset
, oview_size
, oview
);
3302 // Create the PLT section.
3304 template<int size
, bool big_endian
>
3306 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3309 if (this->plt_
== NULL
)
3311 if (this->got_
== NULL
)
3312 this->got_section(symtab
, layout
);
3314 if (this->glink_
== NULL
)
3315 make_glink_section(layout
);
3317 // Ensure that .rela.dyn always appears before .rela.plt This is
3318 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3319 // needs to include .rela.plt in its range.
3320 this->rela_dyn_section(layout
);
3322 Reloc_section
* plt_rel
= new Reloc_section(false);
3323 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3324 elfcpp::SHF_ALLOC
, plt_rel
,
3325 ORDER_DYNAMIC_PLT_RELOCS
, false);
3327 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3329 layout
->add_output_section_data(".plt",
3331 ? elfcpp::SHT_PROGBITS
3332 : elfcpp::SHT_NOBITS
),
3333 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3342 // Create the IPLT section.
3344 template<int size
, bool big_endian
>
3346 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3349 if (this->iplt_
== NULL
)
3351 this->make_plt_section(symtab
, layout
);
3353 Reloc_section
* iplt_rel
= new Reloc_section(false);
3354 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3356 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3358 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3362 // A section for huge long branch addresses, similar to plt section.
3364 template<int size
, bool big_endian
>
3365 class Output_data_brlt_powerpc
: public Output_section_data_build
3368 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3369 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3370 size
, big_endian
> Reloc_section
;
3372 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3373 Reloc_section
* brlt_rel
)
3374 : Output_section_data_build(size
== 32 ? 4 : 8),
3382 this->reset_data_size();
3383 this->rel_
->reset_data_size();
3387 finalize_brlt_sizes()
3389 this->finalize_data_size();
3390 this->rel_
->finalize_data_size();
3393 // Add a reloc for an entry in the BRLT.
3395 add_reloc(Address to
, unsigned int off
)
3396 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3398 // Update section and reloc section size.
3400 set_current_size(unsigned int num_branches
)
3402 this->reset_address_and_file_offset();
3403 this->set_current_data_size(num_branches
* 16);
3404 this->finalize_data_size();
3405 Output_section
* os
= this->output_section();
3406 os
->set_section_offsets_need_adjustment();
3407 if (this->rel_
!= NULL
)
3409 unsigned int reloc_size
3410 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3411 this->rel_
->reset_address_and_file_offset();
3412 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3413 this->rel_
->finalize_data_size();
3414 Output_section
* os
= this->rel_
->output_section();
3415 os
->set_section_offsets_need_adjustment();
3421 do_adjust_output_section(Output_section
* os
)
3426 // Write to a map file.
3428 do_print_to_mapfile(Mapfile
* mapfile
) const
3429 { mapfile
->print_output_data(this, "** BRLT"); }
3432 // Write out the BRLT data.
3434 do_write(Output_file
*);
3436 // The reloc section.
3437 Reloc_section
* rel_
;
3438 Target_powerpc
<size
, big_endian
>* targ_
;
3441 // Make the branch lookup table section.
3443 template<int size
, bool big_endian
>
3445 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3447 if (size
== 64 && this->brlt_section_
== NULL
)
3449 Reloc_section
* brlt_rel
= NULL
;
3450 bool is_pic
= parameters
->options().output_is_position_independent();
3453 // When PIC we can't fill in .branch_lt (like .plt it can be
3454 // a bss style section) but must initialise at runtime via
3455 // dynamic relocats.
3456 this->rela_dyn_section(layout
);
3457 brlt_rel
= new Reloc_section(false);
3458 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3461 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3462 if (this->plt_
&& is_pic
)
3463 this->plt_
->output_section()
3464 ->add_output_section_data(this->brlt_section_
);
3466 layout
->add_output_section_data(".branch_lt",
3467 (is_pic
? elfcpp::SHT_NOBITS
3468 : elfcpp::SHT_PROGBITS
),
3469 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3470 this->brlt_section_
,
3471 (is_pic
? ORDER_SMALL_BSS
3472 : ORDER_SMALL_DATA
),
3477 // Write out .branch_lt when non-PIC.
3479 template<int size
, bool big_endian
>
3481 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3483 if (size
== 64 && !parameters
->options().output_is_position_independent())
3485 const section_size_type offset
= this->offset();
3486 const section_size_type oview_size
3487 = convert_to_section_size_type(this->data_size());
3488 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3490 this->targ_
->write_branch_lookup_table(oview
);
3491 of
->write_output_view(offset
, oview_size
, oview
);
3495 static inline uint32_t
3501 static inline uint32_t
3507 static inline uint32_t
3510 return hi(a
+ 0x8000);
3516 static const unsigned char eh_frame_cie
[12];
3520 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3523 'z', 'R', 0, // Augmentation string.
3524 4, // Code alignment.
3525 0x80 - size
/ 8 , // Data alignment.
3527 1, // Augmentation size.
3528 (elfcpp::DW_EH_PE_pcrel
3529 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3530 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3533 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3534 static const unsigned char glink_eh_frame_fde_64v1
[] =
3536 0, 0, 0, 0, // Replaced with offset to .glink.
3537 0, 0, 0, 0, // Replaced with size of .glink.
3538 0, // Augmentation size.
3539 elfcpp::DW_CFA_advance_loc
+ 1,
3540 elfcpp::DW_CFA_register
, 65, 12,
3541 elfcpp::DW_CFA_advance_loc
+ 4,
3542 elfcpp::DW_CFA_restore_extended
, 65
3545 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3546 static const unsigned char glink_eh_frame_fde_64v2
[] =
3548 0, 0, 0, 0, // Replaced with offset to .glink.
3549 0, 0, 0, 0, // Replaced with size of .glink.
3550 0, // Augmentation size.
3551 elfcpp::DW_CFA_advance_loc
+ 1,
3552 elfcpp::DW_CFA_register
, 65, 0,
3553 elfcpp::DW_CFA_advance_loc
+ 4,
3554 elfcpp::DW_CFA_restore_extended
, 65
3557 // Describe __glink_PLTresolve use of LR, 32-bit version.
3558 static const unsigned char glink_eh_frame_fde_32
[] =
3560 0, 0, 0, 0, // Replaced with offset to .glink.
3561 0, 0, 0, 0, // Replaced with size of .glink.
3562 0, // Augmentation size.
3563 elfcpp::DW_CFA_advance_loc
+ 2,
3564 elfcpp::DW_CFA_register
, 65, 0,
3565 elfcpp::DW_CFA_advance_loc
+ 4,
3566 elfcpp::DW_CFA_restore_extended
, 65
3569 static const unsigned char default_fde
[] =
3571 0, 0, 0, 0, // Replaced with offset to stubs.
3572 0, 0, 0, 0, // Replaced with size of stubs.
3573 0, // Augmentation size.
3574 elfcpp::DW_CFA_nop
, // Pad.
3579 template<bool big_endian
>
3581 write_insn(unsigned char* p
, uint32_t v
)
3583 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3586 // Stub_table holds information about plt and long branch stubs.
3587 // Stubs are built in an area following some input section determined
3588 // by group_sections(). This input section is converted to a relaxed
3589 // input section allowing it to be resized to accommodate the stubs
3591 template<int size
, bool big_endian
>
3592 class Stub_table
: public Output_relaxed_input_section
3595 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3596 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3598 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3599 Output_section
* output_section
,
3600 const Output_section::Input_section
* owner
)
3601 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3603 ->section_addralign(owner
->shndx())),
3604 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3605 orig_data_size_(owner
->current_data_size()),
3606 plt_size_(0), last_plt_size_(0),
3607 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3608 need_save_res_(false)
3610 this->set_output_section(output_section
);
3612 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3613 new_relaxed
.push_back(this);
3614 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3617 // Add a plt call stub.
3619 add_plt_call_entry(Address
,
3620 const Sized_relobj_file
<size
, big_endian
>*,
3626 add_plt_call_entry(Address
,
3627 const Sized_relobj_file
<size
, big_endian
>*,
3632 // Find a given plt call stub.
3634 find_plt_call_entry(const Symbol
*) const;
3637 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3638 unsigned int) const;
3641 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3647 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3652 // Add a long branch stub.
3654 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3655 unsigned int, Address
, Address
, bool);
3658 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3662 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3664 Address max_branch_offset
= max_branch_delta(r_type
);
3665 if (max_branch_offset
== 0)
3667 gold_assert(from
!= invalid_address
);
3668 Address loc
= off
+ this->stub_address();
3669 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3673 clear_stubs(bool all
)
3675 this->plt_call_stubs_
.clear();
3676 this->plt_size_
= 0;
3677 this->long_branch_stubs_
.clear();
3678 this->branch_size_
= 0;
3679 this->need_save_res_
= false;
3682 this->last_plt_size_
= 0;
3683 this->last_branch_size_
= 0;
3688 set_address_and_size(const Output_section
* os
, Address off
)
3690 Address start_off
= off
;
3691 off
+= this->orig_data_size_
;
3692 Address my_size
= this->plt_size_
+ this->branch_size_
;
3693 if (this->need_save_res_
)
3694 my_size
+= this->targ_
->savres_section()->data_size();
3696 off
= align_address(off
, this->stub_align());
3697 // Include original section size and alignment padding in size
3698 my_size
+= off
- start_off
;
3699 this->reset_address_and_file_offset();
3700 this->set_current_data_size(my_size
);
3701 this->set_address_and_file_offset(os
->address() + start_off
,
3702 os
->offset() + start_off
);
3707 stub_address() const
3709 return align_address(this->address() + this->orig_data_size_
,
3710 this->stub_align());
3716 return align_address(this->offset() + this->orig_data_size_
,
3717 this->stub_align());
3722 { return this->plt_size_
; }
3727 Output_section
* os
= this->output_section();
3728 if (os
->addralign() < this->stub_align())
3730 os
->set_addralign(this->stub_align());
3731 // FIXME: get rid of the insane checkpointing.
3732 // We can't increase alignment of the input section to which
3733 // stubs are attached; The input section may be .init which
3734 // is pasted together with other .init sections to form a
3735 // function. Aligning might insert zero padding resulting in
3736 // sigill. However we do need to increase alignment of the
3737 // output section so that the align_address() on offset in
3738 // set_address_and_size() adds the same padding as the
3739 // align_address() on address in stub_address().
3740 // What's more, we need this alignment for the layout done in
3741 // relaxation_loop_body() so that the output section starts at
3742 // a suitably aligned address.
3743 os
->checkpoint_set_addralign(this->stub_align());
3745 if (this->last_plt_size_
!= this->plt_size_
3746 || this->last_branch_size_
!= this->branch_size_
)
3748 this->last_plt_size_
= this->plt_size_
;
3749 this->last_branch_size_
= this->branch_size_
;
3755 // Add .eh_frame info for this stub section. Unlike other linker
3756 // generated .eh_frame this is added late in the link, because we
3757 // only want the .eh_frame info if this particular stub section is
3760 add_eh_frame(Layout
* layout
)
3762 if (!this->eh_frame_added_
)
3764 if (!parameters
->options().ld_generated_unwind_info())
3767 // Since we add stub .eh_frame info late, it must be placed
3768 // after all other linker generated .eh_frame info so that
3769 // merge mapping need not be updated for input sections.
3770 // There is no provision to use a different CIE to that used
3772 if (!this->targ_
->has_glink())
3775 layout
->add_eh_frame_for_plt(this,
3776 Eh_cie
<size
>::eh_frame_cie
,
3777 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3779 sizeof (default_fde
));
3780 this->eh_frame_added_
= true;
3784 Target_powerpc
<size
, big_endian
>*
3790 class Plt_stub_ent_hash
;
3791 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3792 Plt_stub_ent_hash
> Plt_stub_entries
;
3794 // Alignment of stub section.
3800 unsigned int min_align
= 32;
3801 unsigned int user_align
= 1 << parameters
->options().plt_align();
3802 return std::max(user_align
, min_align
);
3805 // Return the plt offset for the given call stub.
3807 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3809 const Symbol
* gsym
= p
->first
.sym_
;
3812 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3813 && gsym
->can_use_relative_reloc(false));
3814 return gsym
->plt_offset();
3819 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3820 unsigned int local_sym_index
= p
->first
.locsym_
;
3821 return relobj
->local_plt_offset(local_sym_index
);
3825 // Size of a given plt call stub.
3827 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3833 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3835 plt_addr
+= this->targ_
->iplt_section()->address();
3837 plt_addr
+= this->targ_
->plt_section()->address();
3838 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3839 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3840 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3841 got_addr
+= ppcobj
->toc_base_offset();
3842 Address off
= plt_addr
- got_addr
;
3843 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3844 if (this->targ_
->abiversion() < 2)
3846 bool static_chain
= parameters
->options().plt_static_chain();
3847 bool thread_safe
= this->targ_
->plt_thread_safe();
3851 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3853 unsigned int align
= 1 << parameters
->options().plt_align();
3855 bytes
= (bytes
+ align
- 1) & -align
;
3859 // Return long branch stub size.
3861 branch_stub_size(Address to
)
3864 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3865 if (to
- loc
+ (1 << 25) < 2 << 25)
3867 if (size
== 64 || !parameters
->options().output_is_position_independent())
3874 do_write(Output_file
*);
3876 // Plt call stub keys.
3880 Plt_stub_ent(const Symbol
* sym
)
3881 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3884 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3885 unsigned int locsym_index
)
3886 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3889 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3891 unsigned int r_type
,
3893 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3896 this->addend_
= addend
;
3897 else if (parameters
->options().output_is_position_independent()
3898 && r_type
== elfcpp::R_PPC_PLTREL24
)
3900 this->addend_
= addend
;
3901 if (this->addend_
>= 32768)
3902 this->object_
= object
;
3906 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3907 unsigned int locsym_index
,
3908 unsigned int r_type
,
3910 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3913 this->addend_
= addend
;
3914 else if (parameters
->options().output_is_position_independent()
3915 && r_type
== elfcpp::R_PPC_PLTREL24
)
3916 this->addend_
= addend
;
3919 bool operator==(const Plt_stub_ent
& that
) const
3921 return (this->sym_
== that
.sym_
3922 && this->object_
== that
.object_
3923 && this->addend_
== that
.addend_
3924 && this->locsym_
== that
.locsym_
);
3928 const Sized_relobj_file
<size
, big_endian
>* object_
;
3929 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3930 unsigned int locsym_
;
3933 class Plt_stub_ent_hash
3936 size_t operator()(const Plt_stub_ent
& ent
) const
3938 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3939 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3945 // Long branch stub keys.
3946 class Branch_stub_ent
3949 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
3950 Address to
, bool save_res
)
3951 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
3954 toc_base_off_
= obj
->toc_base_offset();
3957 bool operator==(const Branch_stub_ent
& that
) const
3959 return (this->dest_
== that
.dest_
3961 || this->toc_base_off_
== that
.toc_base_off_
));
3965 unsigned int toc_base_off_
;
3969 class Branch_stub_ent_hash
3972 size_t operator()(const Branch_stub_ent
& ent
) const
3973 { return ent
.dest_
^ ent
.toc_base_off_
; }
3976 // In a sane world this would be a global.
3977 Target_powerpc
<size
, big_endian
>* targ_
;
3978 // Map sym/object/addend to stub offset.
3979 Plt_stub_entries plt_call_stubs_
;
3980 // Map destination address to stub offset.
3981 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3982 Branch_stub_ent_hash
> Branch_stub_entries
;
3983 Branch_stub_entries long_branch_stubs_
;
3984 // size of input section
3985 section_size_type orig_data_size_
;
3987 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3988 // Whether .eh_frame info has been created for this stub section.
3989 bool eh_frame_added_
;
3990 // Set if this stub group needs a copy of out-of-line register
3991 // save/restore functions.
3992 bool need_save_res_
;
3995 // Add a plt call stub, if we do not already have one for this
3996 // sym/object/addend combo.
3998 template<int size
, bool big_endian
>
4000 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4002 const Sized_relobj_file
<size
, big_endian
>* object
,
4004 unsigned int r_type
,
4007 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4008 unsigned int off
= this->plt_size_
;
4009 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4010 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4012 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4013 return this->can_reach_stub(from
, off
, r_type
);
4016 template<int size
, bool big_endian
>
4018 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4020 const Sized_relobj_file
<size
, big_endian
>* object
,
4021 unsigned int locsym_index
,
4022 unsigned int r_type
,
4025 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4026 unsigned int off
= this->plt_size_
;
4027 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4028 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4030 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4031 return this->can_reach_stub(from
, off
, r_type
);
4034 // Find a plt call stub.
4036 template<int size
, bool big_endian
>
4037 typename Stub_table
<size
, big_endian
>::Address
4038 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4039 const Sized_relobj_file
<size
, big_endian
>* object
,
4041 unsigned int r_type
,
4042 Address addend
) const
4044 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4045 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4046 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4049 template<int size
, bool big_endian
>
4050 typename Stub_table
<size
, big_endian
>::Address
4051 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4053 Plt_stub_ent
ent(gsym
);
4054 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4055 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4058 template<int size
, bool big_endian
>
4059 typename Stub_table
<size
, big_endian
>::Address
4060 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4061 const Sized_relobj_file
<size
, big_endian
>* object
,
4062 unsigned int locsym_index
,
4063 unsigned int r_type
,
4064 Address addend
) const
4066 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4067 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4068 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4071 template<int size
, bool big_endian
>
4072 typename Stub_table
<size
, big_endian
>::Address
4073 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4074 const Sized_relobj_file
<size
, big_endian
>* object
,
4075 unsigned int locsym_index
) const
4077 Plt_stub_ent
ent(object
, locsym_index
);
4078 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4079 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4082 // Add a long branch stub if we don't already have one to given
4085 template<int size
, bool big_endian
>
4087 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4088 const Powerpc_relobj
<size
, big_endian
>* object
,
4089 unsigned int r_type
,
4094 Branch_stub_ent
ent(object
, to
, save_res
);
4095 Address off
= this->branch_size_
;
4096 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4099 this->need_save_res_
= true;
4102 unsigned int stub_size
= this->branch_stub_size(to
);
4103 this->branch_size_
= off
+ stub_size
;
4104 if (size
== 64 && stub_size
!= 4)
4105 this->targ_
->add_branch_lookup_table(to
);
4108 return this->can_reach_stub(from
, off
, r_type
);
4111 // Find long branch stub offset.
4113 template<int size
, bool big_endian
>
4114 typename Stub_table
<size
, big_endian
>::Address
4115 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4116 const Powerpc_relobj
<size
, big_endian
>* object
,
4119 Branch_stub_ent
ent(object
, to
, false);
4120 typename
Branch_stub_entries::const_iterator p
4121 = this->long_branch_stubs_
.find(ent
);
4122 if (p
== this->long_branch_stubs_
.end())
4123 return invalid_address
;
4124 if (p
->first
.save_res_
)
4125 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4129 // A class to handle .glink.
4131 template<int size
, bool big_endian
>
4132 class Output_data_glink
: public Output_section_data
4135 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4136 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4137 static const int pltresolve_size
= 16*4;
4139 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4140 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4141 end_branch_table_(), ge_size_(0)
4145 add_eh_frame(Layout
* layout
);
4148 add_global_entry(const Symbol
*);
4151 find_global_entry(const Symbol
*) const;
4154 global_entry_address() const
4156 gold_assert(this->is_data_size_valid());
4157 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4158 return this->address() + global_entry_off
;
4162 // Write to a map file.
4164 do_print_to_mapfile(Mapfile
* mapfile
) const
4165 { mapfile
->print_output_data(this, _("** glink")); }
4169 set_final_data_size();
4173 do_write(Output_file
*);
4175 // Allows access to .got and .plt for do_write.
4176 Target_powerpc
<size
, big_endian
>* targ_
;
4178 // Map sym to stub offset.
4179 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4180 Global_entry_stub_entries global_entry_stubs_
;
4182 unsigned int end_branch_table_
, ge_size_
;
4185 template<int size
, bool big_endian
>
4187 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4189 if (!parameters
->options().ld_generated_unwind_info())
4194 if (this->targ_
->abiversion() < 2)
4195 layout
->add_eh_frame_for_plt(this,
4196 Eh_cie
<64>::eh_frame_cie
,
4197 sizeof (Eh_cie
<64>::eh_frame_cie
),
4198 glink_eh_frame_fde_64v1
,
4199 sizeof (glink_eh_frame_fde_64v1
));
4201 layout
->add_eh_frame_for_plt(this,
4202 Eh_cie
<64>::eh_frame_cie
,
4203 sizeof (Eh_cie
<64>::eh_frame_cie
),
4204 glink_eh_frame_fde_64v2
,
4205 sizeof (glink_eh_frame_fde_64v2
));
4209 // 32-bit .glink can use the default since the CIE return
4210 // address reg, LR, is valid.
4211 layout
->add_eh_frame_for_plt(this,
4212 Eh_cie
<32>::eh_frame_cie
,
4213 sizeof (Eh_cie
<32>::eh_frame_cie
),
4215 sizeof (default_fde
));
4216 // Except where LR is used in a PIC __glink_PLTresolve.
4217 if (parameters
->options().output_is_position_independent())
4218 layout
->add_eh_frame_for_plt(this,
4219 Eh_cie
<32>::eh_frame_cie
,
4220 sizeof (Eh_cie
<32>::eh_frame_cie
),
4221 glink_eh_frame_fde_32
,
4222 sizeof (glink_eh_frame_fde_32
));
4226 template<int size
, bool big_endian
>
4228 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4230 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4231 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4233 this->ge_size_
+= 16;
4236 template<int size
, bool big_endian
>
4237 typename Output_data_glink
<size
, big_endian
>::Address
4238 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4240 typename
Global_entry_stub_entries::const_iterator p
4241 = this->global_entry_stubs_
.find(gsym
);
4242 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4245 template<int size
, bool big_endian
>
4247 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4249 unsigned int count
= this->targ_
->plt_entry_count();
4250 section_size_type total
= 0;
4256 // space for branch table
4257 total
+= 4 * (count
- 1);
4259 total
+= -total
& 15;
4260 total
+= this->pltresolve_size
;
4264 total
+= this->pltresolve_size
;
4266 // space for branch table
4268 if (this->targ_
->abiversion() < 2)
4272 total
+= 4 * (count
- 0x8000);
4276 this->end_branch_table_
= total
;
4277 total
= (total
+ 15) & -16;
4278 total
+= this->ge_size_
;
4280 this->set_data_size(total
);
4283 // Write out plt and long branch stub code.
4285 template<int size
, bool big_endian
>
4287 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4289 if (this->plt_call_stubs_
.empty()
4290 && this->long_branch_stubs_
.empty())
4293 const section_size_type start_off
= this->offset();
4294 const section_size_type off
= this->stub_offset();
4295 const section_size_type oview_size
=
4296 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4297 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4302 const Output_data_got_powerpc
<size
, big_endian
>* got
4303 = this->targ_
->got_section();
4304 Address got_os_addr
= got
->output_section()->address();
4306 if (!this->plt_call_stubs_
.empty())
4308 // The base address of the .plt section.
4309 Address plt_base
= this->targ_
->plt_section()->address();
4310 Address iplt_base
= invalid_address
;
4312 // Write out plt call stubs.
4313 typename
Plt_stub_entries::const_iterator cs
;
4314 for (cs
= this->plt_call_stubs_
.begin();
4315 cs
!= this->plt_call_stubs_
.end();
4319 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4320 Address plt_addr
= pltoff
;
4323 if (iplt_base
== invalid_address
)
4324 iplt_base
= this->targ_
->iplt_section()->address();
4325 plt_addr
+= iplt_base
;
4328 plt_addr
+= plt_base
;
4329 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4330 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4331 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4332 Address off
= plt_addr
- got_addr
;
4334 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4335 gold_error(_("%s: linkage table error against `%s'"),
4336 cs
->first
.object_
->name().c_str(),
4337 cs
->first
.sym_
->demangled_name().c_str());
4339 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4341 = plt_load_toc
&& parameters
->options().plt_static_chain();
4343 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4344 bool use_fake_dep
= false;
4345 Address cmp_branch_off
= 0;
4348 unsigned int pltindex
4349 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4350 / this->targ_
->plt_entry_size());
4352 = (this->targ_
->glink_section()->pltresolve_size
4354 if (pltindex
> 32768)
4355 glinkoff
+= (pltindex
- 32768) * 4;
4357 = this->targ_
->glink_section()->address() + glinkoff
;
4359 = (this->stub_address() + cs
->second
+ 24
4360 + 4 * (ha(off
) != 0)
4361 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4362 + 4 * static_chain
);
4363 cmp_branch_off
= to
- from
;
4364 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4367 p
= oview
+ cs
->second
;
4370 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4374 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4376 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4381 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4383 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4387 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4389 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4393 write_insn
<big_endian
>(p
, mtctr_12
);
4399 write_insn
<big_endian
>(p
, xor_2_12_12
);
4401 write_insn
<big_endian
>(p
, add_11_11_2
);
4404 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4408 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4415 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4417 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4420 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4422 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4426 write_insn
<big_endian
>(p
, mtctr_12
);
4432 write_insn
<big_endian
>(p
, xor_11_12_12
);
4434 write_insn
<big_endian
>(p
, add_2_2_11
);
4439 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4442 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4446 if (thread_safe
&& !use_fake_dep
)
4448 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4450 write_insn
<big_endian
>(p
, bnectr_p4
);
4452 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4455 write_insn
<big_endian
>(p
, bctr
);
4459 // Write out long branch stubs.
4460 typename
Branch_stub_entries::const_iterator bs
;
4461 for (bs
= this->long_branch_stubs_
.begin();
4462 bs
!= this->long_branch_stubs_
.end();
4465 if (bs
->first
.save_res_
)
4467 p
= oview
+ this->plt_size_
+ bs
->second
;
4468 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4469 Address delta
= bs
->first
.dest_
- loc
;
4470 if (delta
+ (1 << 25) < 2 << 25)
4471 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4475 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4476 gold_assert(brlt_addr
!= invalid_address
);
4477 brlt_addr
+= this->targ_
->brlt_section()->address();
4478 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4479 Address brltoff
= brlt_addr
- got_addr
;
4480 if (ha(brltoff
) == 0)
4482 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4486 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4487 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4489 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4490 write_insn
<big_endian
>(p
, bctr
);
4496 if (!this->plt_call_stubs_
.empty())
4498 // The base address of the .plt section.
4499 Address plt_base
= this->targ_
->plt_section()->address();
4500 Address iplt_base
= invalid_address
;
4501 // The address of _GLOBAL_OFFSET_TABLE_.
4502 Address g_o_t
= invalid_address
;
4504 // Write out plt call stubs.
4505 typename
Plt_stub_entries::const_iterator cs
;
4506 for (cs
= this->plt_call_stubs_
.begin();
4507 cs
!= this->plt_call_stubs_
.end();
4511 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4514 if (iplt_base
== invalid_address
)
4515 iplt_base
= this->targ_
->iplt_section()->address();
4516 plt_addr
+= iplt_base
;
4519 plt_addr
+= plt_base
;
4521 p
= oview
+ cs
->second
;
4522 if (parameters
->options().output_is_position_independent())
4525 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4526 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4527 (cs
->first
.object_
));
4528 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4530 unsigned int got2
= ppcobj
->got2_shndx();
4531 got_addr
= ppcobj
->get_output_section_offset(got2
);
4532 gold_assert(got_addr
!= invalid_address
);
4533 got_addr
+= (ppcobj
->output_section(got2
)->address()
4534 + cs
->first
.addend_
);
4538 if (g_o_t
== invalid_address
)
4540 const Output_data_got_powerpc
<size
, big_endian
>* got
4541 = this->targ_
->got_section();
4542 g_o_t
= got
->address() + got
->g_o_t();
4547 Address off
= plt_addr
- got_addr
;
4550 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4551 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4552 write_insn
<big_endian
>(p
+ 8, bctr
);
4556 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4557 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4558 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4559 write_insn
<big_endian
>(p
+ 12, bctr
);
4564 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4565 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4566 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4567 write_insn
<big_endian
>(p
+ 12, bctr
);
4572 // Write out long branch stubs.
4573 typename
Branch_stub_entries::const_iterator bs
;
4574 for (bs
= this->long_branch_stubs_
.begin();
4575 bs
!= this->long_branch_stubs_
.end();
4578 if (bs
->first
.save_res_
)
4580 p
= oview
+ this->plt_size_
+ bs
->second
;
4581 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4582 Address delta
= bs
->first
.dest_
- loc
;
4583 if (delta
+ (1 << 25) < 2 << 25)
4584 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4585 else if (!parameters
->options().output_is_position_independent())
4587 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4588 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4589 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4590 write_insn
<big_endian
>(p
+ 12, bctr
);
4595 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4596 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4597 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4598 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4599 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4600 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4601 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4602 write_insn
<big_endian
>(p
+ 28, bctr
);
4606 if (this->need_save_res_
)
4608 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4609 memcpy (p
, this->targ_
->savres_section()->contents(),
4610 this->targ_
->savres_section()->data_size());
4614 // Write out .glink.
4616 template<int size
, bool big_endian
>
4618 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4620 const section_size_type off
= this->offset();
4621 const section_size_type oview_size
=
4622 convert_to_section_size_type(this->data_size());
4623 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4626 // The base address of the .plt section.
4627 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4628 Address plt_base
= this->targ_
->plt_section()->address();
4632 if (this->end_branch_table_
!= 0)
4634 // Write pltresolve stub.
4636 Address after_bcl
= this->address() + 16;
4637 Address pltoff
= plt_base
- after_bcl
;
4639 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4641 if (this->targ_
->abiversion() < 2)
4643 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4644 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4645 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4646 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4647 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4648 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4649 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4650 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4651 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4652 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4656 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4657 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4658 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4659 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4660 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4661 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4662 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4663 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4664 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4665 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4666 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4667 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4669 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4670 while (p
< oview
+ this->pltresolve_size
)
4671 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4673 // Write lazy link call stubs.
4675 while (p
< oview
+ this->end_branch_table_
)
4677 if (this->targ_
->abiversion() < 2)
4681 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4685 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4686 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4689 uint32_t branch_off
= 8 - (p
- oview
);
4690 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4695 Address plt_base
= this->targ_
->plt_section()->address();
4696 Address iplt_base
= invalid_address
;
4697 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4698 Address global_entry_base
= this->address() + global_entry_off
;
4699 typename
Global_entry_stub_entries::const_iterator ge
;
4700 for (ge
= this->global_entry_stubs_
.begin();
4701 ge
!= this->global_entry_stubs_
.end();
4704 p
= oview
+ global_entry_off
+ ge
->second
;
4705 Address plt_addr
= ge
->first
->plt_offset();
4706 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4707 && ge
->first
->can_use_relative_reloc(false))
4709 if (iplt_base
== invalid_address
)
4710 iplt_base
= this->targ_
->iplt_section()->address();
4711 plt_addr
+= iplt_base
;
4714 plt_addr
+= plt_base
;
4715 Address my_addr
= global_entry_base
+ ge
->second
;
4716 Address off
= plt_addr
- my_addr
;
4718 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4719 gold_error(_("%s: linkage table error against `%s'"),
4720 ge
->first
->object()->name().c_str(),
4721 ge
->first
->demangled_name().c_str());
4723 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4724 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4725 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4726 write_insn
<big_endian
>(p
, bctr
);
4731 const Output_data_got_powerpc
<size
, big_endian
>* got
4732 = this->targ_
->got_section();
4733 // The address of _GLOBAL_OFFSET_TABLE_.
4734 Address g_o_t
= got
->address() + got
->g_o_t();
4736 // Write out pltresolve branch table.
4738 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4739 unsigned char* end_p
= oview
+ the_end
;
4740 while (p
< end_p
- 8 * 4)
4741 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4743 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4745 // Write out pltresolve call stub.
4746 if (parameters
->options().output_is_position_independent())
4748 Address res0_off
= 0;
4749 Address after_bcl_off
= the_end
+ 12;
4750 Address bcl_res0
= after_bcl_off
- res0_off
;
4752 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4753 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4754 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4755 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4756 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4757 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4758 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4760 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4762 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4763 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4765 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4766 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4770 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4771 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4773 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4774 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4775 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4776 write_insn
<big_endian
>(p
+ 52, bctr
);
4777 write_insn
<big_endian
>(p
+ 56, nop
);
4778 write_insn
<big_endian
>(p
+ 60, nop
);
4782 Address res0
= this->address();
4784 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4785 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4786 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4787 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4789 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4790 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4791 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4792 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4793 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4794 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4796 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4797 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4798 write_insn
<big_endian
>(p
+ 32, bctr
);
4799 write_insn
<big_endian
>(p
+ 36, nop
);
4800 write_insn
<big_endian
>(p
+ 40, nop
);
4801 write_insn
<big_endian
>(p
+ 44, nop
);
4802 write_insn
<big_endian
>(p
+ 48, nop
);
4803 write_insn
<big_endian
>(p
+ 52, nop
);
4804 write_insn
<big_endian
>(p
+ 56, nop
);
4805 write_insn
<big_endian
>(p
+ 60, nop
);
4810 of
->write_output_view(off
, oview_size
, oview
);
4814 // A class to handle linker generated save/restore functions.
4816 template<int size
, bool big_endian
>
4817 class Output_data_save_res
: public Output_section_data_build
4820 Output_data_save_res(Symbol_table
* symtab
);
4822 const unsigned char*
4829 // Write to a map file.
4831 do_print_to_mapfile(Mapfile
* mapfile
) const
4832 { mapfile
->print_output_data(this, _("** save/restore")); }
4835 do_write(Output_file
*);
4838 // The maximum size of save/restore contents.
4839 static const unsigned int savres_max
= 218*4;
4842 savres_define(Symbol_table
* symtab
,
4844 unsigned int lo
, unsigned int hi
,
4845 unsigned char* write_ent(unsigned char*, int),
4846 unsigned char* write_tail(unsigned char*, int));
4848 unsigned char *contents_
;
4851 template<bool big_endian
>
4852 static unsigned char*
4853 savegpr0(unsigned char* p
, int r
)
4855 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4856 write_insn
<big_endian
>(p
, insn
);
4860 template<bool big_endian
>
4861 static unsigned char*
4862 savegpr0_tail(unsigned char* p
, int r
)
4864 p
= savegpr0
<big_endian
>(p
, r
);
4865 uint32_t insn
= std_0_1
+ 16;
4866 write_insn
<big_endian
>(p
, insn
);
4868 write_insn
<big_endian
>(p
, blr
);
4872 template<bool big_endian
>
4873 static unsigned char*
4874 restgpr0(unsigned char* p
, int r
)
4876 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4877 write_insn
<big_endian
>(p
, insn
);
4881 template<bool big_endian
>
4882 static unsigned char*
4883 restgpr0_tail(unsigned char* p
, int r
)
4885 uint32_t insn
= ld_0_1
+ 16;
4886 write_insn
<big_endian
>(p
, insn
);
4888 p
= restgpr0
<big_endian
>(p
, r
);
4889 write_insn
<big_endian
>(p
, mtlr_0
);
4893 p
= restgpr0
<big_endian
>(p
, 30);
4894 p
= restgpr0
<big_endian
>(p
, 31);
4896 write_insn
<big_endian
>(p
, blr
);
4900 template<bool big_endian
>
4901 static unsigned char*
4902 savegpr1(unsigned char* p
, int r
)
4904 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4905 write_insn
<big_endian
>(p
, insn
);
4909 template<bool big_endian
>
4910 static unsigned char*
4911 savegpr1_tail(unsigned char* p
, int r
)
4913 p
= savegpr1
<big_endian
>(p
, r
);
4914 write_insn
<big_endian
>(p
, blr
);
4918 template<bool big_endian
>
4919 static unsigned char*
4920 restgpr1(unsigned char* p
, int r
)
4922 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4923 write_insn
<big_endian
>(p
, insn
);
4927 template<bool big_endian
>
4928 static unsigned char*
4929 restgpr1_tail(unsigned char* p
, int r
)
4931 p
= restgpr1
<big_endian
>(p
, r
);
4932 write_insn
<big_endian
>(p
, blr
);
4936 template<bool big_endian
>
4937 static unsigned char*
4938 savefpr(unsigned char* p
, int r
)
4940 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4941 write_insn
<big_endian
>(p
, insn
);
4945 template<bool big_endian
>
4946 static unsigned char*
4947 savefpr0_tail(unsigned char* p
, int r
)
4949 p
= savefpr
<big_endian
>(p
, r
);
4950 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4952 write_insn
<big_endian
>(p
, blr
);
4956 template<bool big_endian
>
4957 static unsigned char*
4958 restfpr(unsigned char* p
, int r
)
4960 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4961 write_insn
<big_endian
>(p
, insn
);
4965 template<bool big_endian
>
4966 static unsigned char*
4967 restfpr0_tail(unsigned char* p
, int r
)
4969 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4971 p
= restfpr
<big_endian
>(p
, r
);
4972 write_insn
<big_endian
>(p
, mtlr_0
);
4976 p
= restfpr
<big_endian
>(p
, 30);
4977 p
= restfpr
<big_endian
>(p
, 31);
4979 write_insn
<big_endian
>(p
, blr
);
4983 template<bool big_endian
>
4984 static unsigned char*
4985 savefpr1_tail(unsigned char* p
, int r
)
4987 p
= savefpr
<big_endian
>(p
, r
);
4988 write_insn
<big_endian
>(p
, blr
);
4992 template<bool big_endian
>
4993 static unsigned char*
4994 restfpr1_tail(unsigned char* p
, int r
)
4996 p
= restfpr
<big_endian
>(p
, r
);
4997 write_insn
<big_endian
>(p
, blr
);
5001 template<bool big_endian
>
5002 static unsigned char*
5003 savevr(unsigned char* p
, int r
)
5005 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5006 write_insn
<big_endian
>(p
, insn
);
5008 insn
= stvx_0_12_0
+ (r
<< 21);
5009 write_insn
<big_endian
>(p
, insn
);
5013 template<bool big_endian
>
5014 static unsigned char*
5015 savevr_tail(unsigned char* p
, int r
)
5017 p
= savevr
<big_endian
>(p
, r
);
5018 write_insn
<big_endian
>(p
, blr
);
5022 template<bool big_endian
>
5023 static unsigned char*
5024 restvr(unsigned char* p
, int r
)
5026 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5027 write_insn
<big_endian
>(p
, insn
);
5029 insn
= lvx_0_12_0
+ (r
<< 21);
5030 write_insn
<big_endian
>(p
, insn
);
5034 template<bool big_endian
>
5035 static unsigned char*
5036 restvr_tail(unsigned char* p
, int r
)
5038 p
= restvr
<big_endian
>(p
, r
);
5039 write_insn
<big_endian
>(p
, blr
);
5044 template<int size
, bool big_endian
>
5045 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5046 Symbol_table
* symtab
)
5047 : Output_section_data_build(4),
5050 this->savres_define(symtab
,
5051 "_savegpr0_", 14, 31,
5052 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5053 this->savres_define(symtab
,
5054 "_restgpr0_", 14, 29,
5055 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5056 this->savres_define(symtab
,
5057 "_restgpr0_", 30, 31,
5058 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5059 this->savres_define(symtab
,
5060 "_savegpr1_", 14, 31,
5061 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5062 this->savres_define(symtab
,
5063 "_restgpr1_", 14, 31,
5064 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5065 this->savres_define(symtab
,
5066 "_savefpr_", 14, 31,
5067 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5068 this->savres_define(symtab
,
5069 "_restfpr_", 14, 29,
5070 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5071 this->savres_define(symtab
,
5072 "_restfpr_", 30, 31,
5073 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5074 this->savres_define(symtab
,
5076 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5077 this->savres_define(symtab
,
5079 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5080 this->savres_define(symtab
,
5082 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5083 this->savres_define(symtab
,
5085 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5088 template<int size
, bool big_endian
>
5090 Output_data_save_res
<size
, big_endian
>::savres_define(
5091 Symbol_table
* symtab
,
5093 unsigned int lo
, unsigned int hi
,
5094 unsigned char* write_ent(unsigned char*, int),
5095 unsigned char* write_tail(unsigned char*, int))
5097 size_t len
= strlen(name
);
5098 bool writing
= false;
5101 memcpy(sym
, name
, len
);
5104 for (unsigned int i
= lo
; i
<= hi
; i
++)
5106 sym
[len
+ 0] = i
/ 10 + '0';
5107 sym
[len
+ 1] = i
% 10 + '0';
5108 Symbol
* gsym
= symtab
->lookup(sym
);
5109 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5110 writing
= writing
|| refd
;
5113 if (this->contents_
== NULL
)
5114 this->contents_
= new unsigned char[this->savres_max
];
5116 section_size_type value
= this->current_data_size();
5117 unsigned char* p
= this->contents_
+ value
;
5119 p
= write_ent(p
, i
);
5121 p
= write_tail(p
, i
);
5122 section_size_type cur_size
= p
- this->contents_
;
5123 this->set_current_data_size(cur_size
);
5125 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5126 this, value
, cur_size
- value
,
5127 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5128 elfcpp::STV_HIDDEN
, 0, false, false);
5133 // Write out save/restore.
5135 template<int size
, bool big_endian
>
5137 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5139 const section_size_type off
= this->offset();
5140 const section_size_type oview_size
=
5141 convert_to_section_size_type(this->data_size());
5142 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5143 memcpy(oview
, this->contents_
, oview_size
);
5144 of
->write_output_view(off
, oview_size
, oview
);
5148 // Create the glink section.
5150 template<int size
, bool big_endian
>
5152 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5154 if (this->glink_
== NULL
)
5156 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5157 this->glink_
->add_eh_frame(layout
);
5158 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5159 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5160 this->glink_
, ORDER_TEXT
, false);
5164 // Create a PLT entry for a global symbol.
5166 template<int size
, bool big_endian
>
5168 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5172 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5173 && gsym
->can_use_relative_reloc(false))
5175 if (this->iplt_
== NULL
)
5176 this->make_iplt_section(symtab
, layout
);
5177 this->iplt_
->add_ifunc_entry(gsym
);
5181 if (this->plt_
== NULL
)
5182 this->make_plt_section(symtab
, layout
);
5183 this->plt_
->add_entry(gsym
);
5187 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5189 template<int size
, bool big_endian
>
5191 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5192 Symbol_table
* symtab
,
5194 Sized_relobj_file
<size
, big_endian
>* relobj
,
5197 if (this->iplt_
== NULL
)
5198 this->make_iplt_section(symtab
, layout
);
5199 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5202 // Return the number of entries in the PLT.
5204 template<int size
, bool big_endian
>
5206 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5208 if (this->plt_
== NULL
)
5210 return this->plt_
->entry_count();
5213 // Create a GOT entry for local dynamic __tls_get_addr calls.
5215 template<int size
, bool big_endian
>
5217 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5218 Symbol_table
* symtab
,
5220 Sized_relobj_file
<size
, big_endian
>* object
)
5222 if (this->tlsld_got_offset_
== -1U)
5224 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5225 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5226 Output_data_got_powerpc
<size
, big_endian
>* got
5227 = this->got_section(symtab
, layout
);
5228 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5229 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5231 this->tlsld_got_offset_
= got_offset
;
5233 return this->tlsld_got_offset_
;
5236 // Get the Reference_flags for a particular relocation.
5238 template<int size
, bool big_endian
>
5240 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5241 unsigned int r_type
,
5242 const Target_powerpc
* target
)
5248 case elfcpp::R_POWERPC_NONE
:
5249 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5250 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5251 case elfcpp::R_PPC64_TOC
:
5252 // No symbol reference.
5255 case elfcpp::R_PPC64_ADDR64
:
5256 case elfcpp::R_PPC64_UADDR64
:
5257 case elfcpp::R_POWERPC_ADDR32
:
5258 case elfcpp::R_POWERPC_UADDR32
:
5259 case elfcpp::R_POWERPC_ADDR16
:
5260 case elfcpp::R_POWERPC_UADDR16
:
5261 case elfcpp::R_POWERPC_ADDR16_LO
:
5262 case elfcpp::R_POWERPC_ADDR16_HI
:
5263 case elfcpp::R_POWERPC_ADDR16_HA
:
5264 ref
= Symbol::ABSOLUTE_REF
;
5267 case elfcpp::R_POWERPC_ADDR24
:
5268 case elfcpp::R_POWERPC_ADDR14
:
5269 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5270 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5271 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5274 case elfcpp::R_PPC64_REL64
:
5275 case elfcpp::R_POWERPC_REL32
:
5276 case elfcpp::R_PPC_LOCAL24PC
:
5277 case elfcpp::R_POWERPC_REL16
:
5278 case elfcpp::R_POWERPC_REL16_LO
:
5279 case elfcpp::R_POWERPC_REL16_HI
:
5280 case elfcpp::R_POWERPC_REL16_HA
:
5281 ref
= Symbol::RELATIVE_REF
;
5284 case elfcpp::R_POWERPC_REL24
:
5285 case elfcpp::R_PPC_PLTREL24
:
5286 case elfcpp::R_POWERPC_REL14
:
5287 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5288 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5289 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5292 case elfcpp::R_POWERPC_GOT16
:
5293 case elfcpp::R_POWERPC_GOT16_LO
:
5294 case elfcpp::R_POWERPC_GOT16_HI
:
5295 case elfcpp::R_POWERPC_GOT16_HA
:
5296 case elfcpp::R_PPC64_GOT16_DS
:
5297 case elfcpp::R_PPC64_GOT16_LO_DS
:
5298 case elfcpp::R_PPC64_TOC16
:
5299 case elfcpp::R_PPC64_TOC16_LO
:
5300 case elfcpp::R_PPC64_TOC16_HI
:
5301 case elfcpp::R_PPC64_TOC16_HA
:
5302 case elfcpp::R_PPC64_TOC16_DS
:
5303 case elfcpp::R_PPC64_TOC16_LO_DS
:
5305 ref
= Symbol::ABSOLUTE_REF
;
5308 case elfcpp::R_POWERPC_GOT_TPREL16
:
5309 case elfcpp::R_POWERPC_TLS
:
5310 ref
= Symbol::TLS_REF
;
5313 case elfcpp::R_POWERPC_COPY
:
5314 case elfcpp::R_POWERPC_GLOB_DAT
:
5315 case elfcpp::R_POWERPC_JMP_SLOT
:
5316 case elfcpp::R_POWERPC_RELATIVE
:
5317 case elfcpp::R_POWERPC_DTPMOD
:
5319 // Not expected. We will give an error later.
5323 if (size
== 64 && target
->abiversion() < 2)
5324 ref
|= Symbol::FUNC_DESC_ABI
;
5328 // Report an unsupported relocation against a local symbol.
5330 template<int size
, bool big_endian
>
5332 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5333 Sized_relobj_file
<size
, big_endian
>* object
,
5334 unsigned int r_type
)
5336 gold_error(_("%s: unsupported reloc %u against local symbol"),
5337 object
->name().c_str(), r_type
);
5340 // We are about to emit a dynamic relocation of type R_TYPE. If the
5341 // dynamic linker does not support it, issue an error.
5343 template<int size
, bool big_endian
>
5345 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5346 unsigned int r_type
)
5348 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5350 // These are the relocation types supported by glibc for both 32-bit
5351 // and 64-bit powerpc.
5354 case elfcpp::R_POWERPC_NONE
:
5355 case elfcpp::R_POWERPC_RELATIVE
:
5356 case elfcpp::R_POWERPC_GLOB_DAT
:
5357 case elfcpp::R_POWERPC_DTPMOD
:
5358 case elfcpp::R_POWERPC_DTPREL
:
5359 case elfcpp::R_POWERPC_TPREL
:
5360 case elfcpp::R_POWERPC_JMP_SLOT
:
5361 case elfcpp::R_POWERPC_COPY
:
5362 case elfcpp::R_POWERPC_IRELATIVE
:
5363 case elfcpp::R_POWERPC_ADDR32
:
5364 case elfcpp::R_POWERPC_UADDR32
:
5365 case elfcpp::R_POWERPC_ADDR24
:
5366 case elfcpp::R_POWERPC_ADDR16
:
5367 case elfcpp::R_POWERPC_UADDR16
:
5368 case elfcpp::R_POWERPC_ADDR16_LO
:
5369 case elfcpp::R_POWERPC_ADDR16_HI
:
5370 case elfcpp::R_POWERPC_ADDR16_HA
:
5371 case elfcpp::R_POWERPC_ADDR14
:
5372 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5373 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5374 case elfcpp::R_POWERPC_REL32
:
5375 case elfcpp::R_POWERPC_REL24
:
5376 case elfcpp::R_POWERPC_TPREL16
:
5377 case elfcpp::R_POWERPC_TPREL16_LO
:
5378 case elfcpp::R_POWERPC_TPREL16_HI
:
5379 case elfcpp::R_POWERPC_TPREL16_HA
:
5390 // These are the relocation types supported only on 64-bit.
5391 case elfcpp::R_PPC64_ADDR64
:
5392 case elfcpp::R_PPC64_UADDR64
:
5393 case elfcpp::R_PPC64_JMP_IREL
:
5394 case elfcpp::R_PPC64_ADDR16_DS
:
5395 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5396 case elfcpp::R_PPC64_ADDR16_HIGH
:
5397 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5398 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5399 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5400 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5401 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5402 case elfcpp::R_PPC64_REL64
:
5403 case elfcpp::R_POWERPC_ADDR30
:
5404 case elfcpp::R_PPC64_TPREL16_DS
:
5405 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5406 case elfcpp::R_PPC64_TPREL16_HIGH
:
5407 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5408 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5409 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5410 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5411 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5422 // These are the relocation types supported only on 32-bit.
5423 // ??? glibc ld.so doesn't need to support these.
5424 case elfcpp::R_POWERPC_DTPREL16
:
5425 case elfcpp::R_POWERPC_DTPREL16_LO
:
5426 case elfcpp::R_POWERPC_DTPREL16_HI
:
5427 case elfcpp::R_POWERPC_DTPREL16_HA
:
5435 // This prevents us from issuing more than one error per reloc
5436 // section. But we can still wind up issuing more than one
5437 // error per object file.
5438 if (this->issued_non_pic_error_
)
5440 gold_assert(parameters
->options().output_is_position_independent());
5441 object
->error(_("requires unsupported dynamic reloc; "
5442 "recompile with -fPIC"));
5443 this->issued_non_pic_error_
= true;
5447 // Return whether we need to make a PLT entry for a relocation of the
5448 // given type against a STT_GNU_IFUNC symbol.
5450 template<int size
, bool big_endian
>
5452 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5453 Target_powerpc
<size
, big_endian
>* target
,
5454 Sized_relobj_file
<size
, big_endian
>* object
,
5455 unsigned int r_type
,
5458 // In non-pic code any reference will resolve to the plt call stub
5459 // for the ifunc symbol.
5460 if ((size
== 32 || target
->abiversion() >= 2)
5461 && !parameters
->options().output_is_position_independent())
5466 // Word size refs from data sections are OK, but don't need a PLT entry.
5467 case elfcpp::R_POWERPC_ADDR32
:
5468 case elfcpp::R_POWERPC_UADDR32
:
5473 case elfcpp::R_PPC64_ADDR64
:
5474 case elfcpp::R_PPC64_UADDR64
:
5479 // GOT refs are good, but also don't need a PLT entry.
5480 case elfcpp::R_POWERPC_GOT16
:
5481 case elfcpp::R_POWERPC_GOT16_LO
:
5482 case elfcpp::R_POWERPC_GOT16_HI
:
5483 case elfcpp::R_POWERPC_GOT16_HA
:
5484 case elfcpp::R_PPC64_GOT16_DS
:
5485 case elfcpp::R_PPC64_GOT16_LO_DS
:
5488 // Function calls are good, and these do need a PLT entry.
5489 case elfcpp::R_POWERPC_ADDR24
:
5490 case elfcpp::R_POWERPC_ADDR14
:
5491 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5492 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5493 case elfcpp::R_POWERPC_REL24
:
5494 case elfcpp::R_PPC_PLTREL24
:
5495 case elfcpp::R_POWERPC_REL14
:
5496 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5497 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5504 // Anything else is a problem.
5505 // If we are building a static executable, the libc startup function
5506 // responsible for applying indirect function relocations is going
5507 // to complain about the reloc type.
5508 // If we are building a dynamic executable, we will have a text
5509 // relocation. The dynamic loader will set the text segment
5510 // writable and non-executable to apply text relocations. So we'll
5511 // segfault when trying to run the indirection function to resolve
5514 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5515 object
->name().c_str(), r_type
);
5519 // Scan a relocation for a local symbol.
5521 template<int size
, bool big_endian
>
5523 Target_powerpc
<size
, big_endian
>::Scan::local(
5524 Symbol_table
* symtab
,
5526 Target_powerpc
<size
, big_endian
>* target
,
5527 Sized_relobj_file
<size
, big_endian
>* object
,
5528 unsigned int data_shndx
,
5529 Output_section
* output_section
,
5530 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5531 unsigned int r_type
,
5532 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5535 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5537 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5538 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5540 this->expect_tls_get_addr_call();
5541 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5542 if (tls_type
!= tls::TLSOPT_NONE
)
5543 this->skip_next_tls_get_addr_call();
5545 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5546 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5548 this->expect_tls_get_addr_call();
5549 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5550 if (tls_type
!= tls::TLSOPT_NONE
)
5551 this->skip_next_tls_get_addr_call();
5554 Powerpc_relobj
<size
, big_endian
>* ppc_object
5555 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5560 && data_shndx
== ppc_object
->opd_shndx()
5561 && r_type
== elfcpp::R_PPC64_ADDR64
)
5562 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5566 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5567 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5568 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5570 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5571 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5572 r_type
, r_sym
, reloc
.get_r_addend());
5573 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5578 case elfcpp::R_POWERPC_NONE
:
5579 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5580 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5581 case elfcpp::R_PPC64_TOCSAVE
:
5582 case elfcpp::R_POWERPC_TLS
:
5585 case elfcpp::R_PPC64_TOC
:
5587 Output_data_got_powerpc
<size
, big_endian
>* got
5588 = target
->got_section(symtab
, layout
);
5589 if (parameters
->options().output_is_position_independent())
5591 Address off
= reloc
.get_r_offset();
5593 && target
->abiversion() < 2
5594 && data_shndx
== ppc_object
->opd_shndx()
5595 && ppc_object
->get_opd_discard(off
- 8))
5598 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5599 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5600 rela_dyn
->add_output_section_relative(got
->output_section(),
5601 elfcpp::R_POWERPC_RELATIVE
,
5603 object
, data_shndx
, off
,
5604 symobj
->toc_base_offset());
5609 case elfcpp::R_PPC64_ADDR64
:
5610 case elfcpp::R_PPC64_UADDR64
:
5611 case elfcpp::R_POWERPC_ADDR32
:
5612 case elfcpp::R_POWERPC_UADDR32
:
5613 case elfcpp::R_POWERPC_ADDR24
:
5614 case elfcpp::R_POWERPC_ADDR16
:
5615 case elfcpp::R_POWERPC_ADDR16_LO
:
5616 case elfcpp::R_POWERPC_ADDR16_HI
:
5617 case elfcpp::R_POWERPC_ADDR16_HA
:
5618 case elfcpp::R_POWERPC_UADDR16
:
5619 case elfcpp::R_PPC64_ADDR16_HIGH
:
5620 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5621 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5622 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5623 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5624 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5625 case elfcpp::R_PPC64_ADDR16_DS
:
5626 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5627 case elfcpp::R_POWERPC_ADDR14
:
5628 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5629 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5630 // If building a shared library (or a position-independent
5631 // executable), we need to create a dynamic relocation for
5633 if (parameters
->options().output_is_position_independent()
5634 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5636 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5638 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5639 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5640 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5642 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5643 : elfcpp::R_POWERPC_RELATIVE
);
5644 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5645 output_section
, data_shndx
,
5646 reloc
.get_r_offset(),
5647 reloc
.get_r_addend(), false);
5649 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5651 check_non_pic(object
, r_type
);
5652 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5653 data_shndx
, reloc
.get_r_offset(),
5654 reloc
.get_r_addend());
5658 gold_assert(lsym
.get_st_value() == 0);
5659 unsigned int shndx
= lsym
.get_st_shndx();
5661 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5664 object
->error(_("section symbol %u has bad shndx %u"),
5667 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5668 output_section
, data_shndx
,
5669 reloc
.get_r_offset());
5674 case elfcpp::R_POWERPC_REL24
:
5675 case elfcpp::R_PPC_PLTREL24
:
5676 case elfcpp::R_PPC_LOCAL24PC
:
5677 case elfcpp::R_POWERPC_REL14
:
5678 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5679 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5681 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5682 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5683 reloc
.get_r_addend());
5686 case elfcpp::R_PPC64_REL64
:
5687 case elfcpp::R_POWERPC_REL32
:
5688 case elfcpp::R_POWERPC_REL16
:
5689 case elfcpp::R_POWERPC_REL16_LO
:
5690 case elfcpp::R_POWERPC_REL16_HI
:
5691 case elfcpp::R_POWERPC_REL16_HA
:
5692 case elfcpp::R_POWERPC_SECTOFF
:
5693 case elfcpp::R_POWERPC_SECTOFF_LO
:
5694 case elfcpp::R_POWERPC_SECTOFF_HI
:
5695 case elfcpp::R_POWERPC_SECTOFF_HA
:
5696 case elfcpp::R_PPC64_SECTOFF_DS
:
5697 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5698 case elfcpp::R_POWERPC_TPREL16
:
5699 case elfcpp::R_POWERPC_TPREL16_LO
:
5700 case elfcpp::R_POWERPC_TPREL16_HI
:
5701 case elfcpp::R_POWERPC_TPREL16_HA
:
5702 case elfcpp::R_PPC64_TPREL16_DS
:
5703 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5704 case elfcpp::R_PPC64_TPREL16_HIGH
:
5705 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5706 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5707 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5708 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5709 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5710 case elfcpp::R_POWERPC_DTPREL16
:
5711 case elfcpp::R_POWERPC_DTPREL16_LO
:
5712 case elfcpp::R_POWERPC_DTPREL16_HI
:
5713 case elfcpp::R_POWERPC_DTPREL16_HA
:
5714 case elfcpp::R_PPC64_DTPREL16_DS
:
5715 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5716 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5717 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5718 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5719 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5720 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5721 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5722 case elfcpp::R_PPC64_TLSGD
:
5723 case elfcpp::R_PPC64_TLSLD
:
5724 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5727 case elfcpp::R_POWERPC_GOT16
:
5728 case elfcpp::R_POWERPC_GOT16_LO
:
5729 case elfcpp::R_POWERPC_GOT16_HI
:
5730 case elfcpp::R_POWERPC_GOT16_HA
:
5731 case elfcpp::R_PPC64_GOT16_DS
:
5732 case elfcpp::R_PPC64_GOT16_LO_DS
:
5734 // The symbol requires a GOT entry.
5735 Output_data_got_powerpc
<size
, big_endian
>* got
5736 = target
->got_section(symtab
, layout
);
5737 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5739 if (!parameters
->options().output_is_position_independent())
5742 && (size
== 32 || target
->abiversion() >= 2))
5743 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5745 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5747 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5749 // If we are generating a shared object or a pie, this
5750 // symbol's GOT entry will be set by a dynamic relocation.
5752 off
= got
->add_constant(0);
5753 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5755 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5757 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5758 : elfcpp::R_POWERPC_RELATIVE
);
5759 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5760 got
, off
, 0, false);
5765 case elfcpp::R_PPC64_TOC16
:
5766 case elfcpp::R_PPC64_TOC16_LO
:
5767 case elfcpp::R_PPC64_TOC16_HI
:
5768 case elfcpp::R_PPC64_TOC16_HA
:
5769 case elfcpp::R_PPC64_TOC16_DS
:
5770 case elfcpp::R_PPC64_TOC16_LO_DS
:
5771 // We need a GOT section.
5772 target
->got_section(symtab
, layout
);
5775 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5776 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5777 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5778 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5780 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5781 if (tls_type
== tls::TLSOPT_NONE
)
5783 Output_data_got_powerpc
<size
, big_endian
>* got
5784 = target
->got_section(symtab
, layout
);
5785 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5786 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5787 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5788 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5790 else if (tls_type
== tls::TLSOPT_TO_LE
)
5792 // no GOT relocs needed for Local Exec.
5799 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5800 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5801 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5802 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5804 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5805 if (tls_type
== tls::TLSOPT_NONE
)
5806 target
->tlsld_got_offset(symtab
, layout
, object
);
5807 else if (tls_type
== tls::TLSOPT_TO_LE
)
5809 // no GOT relocs needed for Local Exec.
5810 if (parameters
->options().emit_relocs())
5812 Output_section
* os
= layout
->tls_segment()->first_section();
5813 gold_assert(os
!= NULL
);
5814 os
->set_needs_symtab_index();
5822 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5823 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5824 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5825 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5827 Output_data_got_powerpc
<size
, big_endian
>* got
5828 = target
->got_section(symtab
, layout
);
5829 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5830 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5834 case elfcpp::R_POWERPC_GOT_TPREL16
:
5835 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5836 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5837 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5839 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5840 if (tls_type
== tls::TLSOPT_NONE
)
5842 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5843 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5845 Output_data_got_powerpc
<size
, big_endian
>* got
5846 = target
->got_section(symtab
, layout
);
5847 unsigned int off
= got
->add_constant(0);
5848 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5850 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5851 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5852 elfcpp::R_POWERPC_TPREL
,
5856 else if (tls_type
== tls::TLSOPT_TO_LE
)
5858 // no GOT relocs needed for Local Exec.
5866 unsupported_reloc_local(object
, r_type
);
5872 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5873 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5874 case elfcpp::R_POWERPC_GOT_TPREL16
:
5875 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5876 case elfcpp::R_POWERPC_GOT16
:
5877 case elfcpp::R_PPC64_GOT16_DS
:
5878 case elfcpp::R_PPC64_TOC16
:
5879 case elfcpp::R_PPC64_TOC16_DS
:
5880 ppc_object
->set_has_small_toc_reloc();
5886 // Report an unsupported relocation against a global symbol.
5888 template<int size
, bool big_endian
>
5890 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5891 Sized_relobj_file
<size
, big_endian
>* object
,
5892 unsigned int r_type
,
5895 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5896 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5899 // Scan a relocation for a global symbol.
5901 template<int size
, bool big_endian
>
5903 Target_powerpc
<size
, big_endian
>::Scan::global(
5904 Symbol_table
* symtab
,
5906 Target_powerpc
<size
, big_endian
>* target
,
5907 Sized_relobj_file
<size
, big_endian
>* object
,
5908 unsigned int data_shndx
,
5909 Output_section
* output_section
,
5910 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5911 unsigned int r_type
,
5914 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5917 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5918 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5920 this->expect_tls_get_addr_call();
5921 const bool final
= gsym
->final_value_is_known();
5922 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5923 if (tls_type
!= tls::TLSOPT_NONE
)
5924 this->skip_next_tls_get_addr_call();
5926 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5927 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5929 this->expect_tls_get_addr_call();
5930 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5931 if (tls_type
!= tls::TLSOPT_NONE
)
5932 this->skip_next_tls_get_addr_call();
5935 Powerpc_relobj
<size
, big_endian
>* ppc_object
5936 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5938 // A STT_GNU_IFUNC symbol may require a PLT entry.
5939 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5940 bool pushed_ifunc
= false;
5941 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5943 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5944 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5945 reloc
.get_r_addend());
5946 target
->make_plt_entry(symtab
, layout
, gsym
);
5947 pushed_ifunc
= true;
5952 case elfcpp::R_POWERPC_NONE
:
5953 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5954 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5955 case elfcpp::R_PPC_LOCAL24PC
:
5956 case elfcpp::R_POWERPC_TLS
:
5959 case elfcpp::R_PPC64_TOC
:
5961 Output_data_got_powerpc
<size
, big_endian
>* got
5962 = target
->got_section(symtab
, layout
);
5963 if (parameters
->options().output_is_position_independent())
5965 Address off
= reloc
.get_r_offset();
5967 && data_shndx
== ppc_object
->opd_shndx()
5968 && ppc_object
->get_opd_discard(off
- 8))
5971 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5972 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5973 if (data_shndx
!= ppc_object
->opd_shndx())
5974 symobj
= static_cast
5975 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5976 rela_dyn
->add_output_section_relative(got
->output_section(),
5977 elfcpp::R_POWERPC_RELATIVE
,
5979 object
, data_shndx
, off
,
5980 symobj
->toc_base_offset());
5985 case elfcpp::R_PPC64_ADDR64
:
5987 && target
->abiversion() < 2
5988 && data_shndx
== ppc_object
->opd_shndx()
5989 && (gsym
->is_defined_in_discarded_section()
5990 || gsym
->object() != object
))
5992 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5996 case elfcpp::R_PPC64_UADDR64
:
5997 case elfcpp::R_POWERPC_ADDR32
:
5998 case elfcpp::R_POWERPC_UADDR32
:
5999 case elfcpp::R_POWERPC_ADDR24
:
6000 case elfcpp::R_POWERPC_ADDR16
:
6001 case elfcpp::R_POWERPC_ADDR16_LO
:
6002 case elfcpp::R_POWERPC_ADDR16_HI
:
6003 case elfcpp::R_POWERPC_ADDR16_HA
:
6004 case elfcpp::R_POWERPC_UADDR16
:
6005 case elfcpp::R_PPC64_ADDR16_HIGH
:
6006 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6007 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6008 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6009 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6010 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6011 case elfcpp::R_PPC64_ADDR16_DS
:
6012 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6013 case elfcpp::R_POWERPC_ADDR14
:
6014 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6015 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6017 // Make a PLT entry if necessary.
6018 if (gsym
->needs_plt_entry())
6020 // Since this is not a PC-relative relocation, we may be
6021 // taking the address of a function. In that case we need to
6022 // set the entry in the dynamic symbol table to the address of
6023 // the PLT call stub.
6024 bool need_ifunc_plt
= false;
6025 if ((size
== 32 || target
->abiversion() >= 2)
6026 && gsym
->is_from_dynobj()
6027 && !parameters
->options().output_is_position_independent())
6029 gsym
->set_needs_dynsym_value();
6030 need_ifunc_plt
= true;
6032 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6034 target
->push_branch(ppc_object
, data_shndx
,
6035 reloc
.get_r_offset(), r_type
,
6036 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6037 reloc
.get_r_addend());
6038 target
->make_plt_entry(symtab
, layout
, gsym
);
6041 // Make a dynamic relocation if necessary.
6042 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6043 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6045 if (!parameters
->options().output_is_position_independent()
6046 && gsym
->may_need_copy_reloc())
6048 target
->copy_reloc(symtab
, layout
, object
,
6049 data_shndx
, output_section
, gsym
, reloc
);
6051 else if ((((size
== 32
6052 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6054 && r_type
== elfcpp::R_PPC64_ADDR64
6055 && target
->abiversion() >= 2))
6056 && gsym
->can_use_relative_reloc(false)
6057 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6058 && parameters
->options().shared()))
6060 && r_type
== elfcpp::R_PPC64_ADDR64
6061 && target
->abiversion() < 2
6062 && (gsym
->can_use_relative_reloc(false)
6063 || data_shndx
== ppc_object
->opd_shndx())))
6065 Reloc_section
* rela_dyn
6066 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6067 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6068 : elfcpp::R_POWERPC_RELATIVE
);
6069 rela_dyn
->add_symbolless_global_addend(
6070 gsym
, dynrel
, output_section
, object
, data_shndx
,
6071 reloc
.get_r_offset(), reloc
.get_r_addend());
6075 Reloc_section
* rela_dyn
6076 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6077 check_non_pic(object
, r_type
);
6078 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6080 reloc
.get_r_offset(),
6081 reloc
.get_r_addend());
6087 case elfcpp::R_PPC_PLTREL24
:
6088 case elfcpp::R_POWERPC_REL24
:
6091 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6093 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6094 reloc
.get_r_addend());
6095 if (gsym
->needs_plt_entry()
6096 || (!gsym
->final_value_is_known()
6097 && (gsym
->is_undefined()
6098 || gsym
->is_from_dynobj()
6099 || gsym
->is_preemptible())))
6100 target
->make_plt_entry(symtab
, layout
, gsym
);
6104 case elfcpp::R_PPC64_REL64
:
6105 case elfcpp::R_POWERPC_REL32
:
6106 // Make a dynamic relocation if necessary.
6107 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6109 if (!parameters
->options().output_is_position_independent()
6110 && gsym
->may_need_copy_reloc())
6112 target
->copy_reloc(symtab
, layout
, object
,
6113 data_shndx
, output_section
, gsym
,
6118 Reloc_section
* rela_dyn
6119 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6120 check_non_pic(object
, r_type
);
6121 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6122 data_shndx
, reloc
.get_r_offset(),
6123 reloc
.get_r_addend());
6128 case elfcpp::R_POWERPC_REL14
:
6129 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6130 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6132 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6133 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6134 reloc
.get_r_addend());
6137 case elfcpp::R_POWERPC_REL16
:
6138 case elfcpp::R_POWERPC_REL16_LO
:
6139 case elfcpp::R_POWERPC_REL16_HI
:
6140 case elfcpp::R_POWERPC_REL16_HA
:
6141 case elfcpp::R_POWERPC_SECTOFF
:
6142 case elfcpp::R_POWERPC_SECTOFF_LO
:
6143 case elfcpp::R_POWERPC_SECTOFF_HI
:
6144 case elfcpp::R_POWERPC_SECTOFF_HA
:
6145 case elfcpp::R_PPC64_SECTOFF_DS
:
6146 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6147 case elfcpp::R_POWERPC_TPREL16
:
6148 case elfcpp::R_POWERPC_TPREL16_LO
:
6149 case elfcpp::R_POWERPC_TPREL16_HI
:
6150 case elfcpp::R_POWERPC_TPREL16_HA
:
6151 case elfcpp::R_PPC64_TPREL16_DS
:
6152 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6153 case elfcpp::R_PPC64_TPREL16_HIGH
:
6154 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6155 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6156 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6157 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6158 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6159 case elfcpp::R_POWERPC_DTPREL16
:
6160 case elfcpp::R_POWERPC_DTPREL16_LO
:
6161 case elfcpp::R_POWERPC_DTPREL16_HI
:
6162 case elfcpp::R_POWERPC_DTPREL16_HA
:
6163 case elfcpp::R_PPC64_DTPREL16_DS
:
6164 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6165 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6166 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6167 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6168 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6169 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6170 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6171 case elfcpp::R_PPC64_TLSGD
:
6172 case elfcpp::R_PPC64_TLSLD
:
6173 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6176 case elfcpp::R_POWERPC_GOT16
:
6177 case elfcpp::R_POWERPC_GOT16_LO
:
6178 case elfcpp::R_POWERPC_GOT16_HI
:
6179 case elfcpp::R_POWERPC_GOT16_HA
:
6180 case elfcpp::R_PPC64_GOT16_DS
:
6181 case elfcpp::R_PPC64_GOT16_LO_DS
:
6183 // The symbol requires a GOT entry.
6184 Output_data_got_powerpc
<size
, big_endian
>* got
;
6186 got
= target
->got_section(symtab
, layout
);
6187 if (gsym
->final_value_is_known())
6190 && (size
== 32 || target
->abiversion() >= 2))
6191 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6193 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6195 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6197 // If we are generating a shared object or a pie, this
6198 // symbol's GOT entry will be set by a dynamic relocation.
6199 unsigned int off
= got
->add_constant(0);
6200 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6202 Reloc_section
* rela_dyn
6203 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6205 if (gsym
->can_use_relative_reloc(false)
6207 || target
->abiversion() >= 2)
6208 && gsym
->visibility() == elfcpp::STV_PROTECTED
6209 && parameters
->options().shared()))
6211 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6212 : elfcpp::R_POWERPC_RELATIVE
);
6213 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6217 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6218 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6224 case elfcpp::R_PPC64_TOC16
:
6225 case elfcpp::R_PPC64_TOC16_LO
:
6226 case elfcpp::R_PPC64_TOC16_HI
:
6227 case elfcpp::R_PPC64_TOC16_HA
:
6228 case elfcpp::R_PPC64_TOC16_DS
:
6229 case elfcpp::R_PPC64_TOC16_LO_DS
:
6230 // We need a GOT section.
6231 target
->got_section(symtab
, layout
);
6234 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6235 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6236 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6237 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6239 const bool final
= gsym
->final_value_is_known();
6240 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6241 if (tls_type
== tls::TLSOPT_NONE
)
6243 Output_data_got_powerpc
<size
, big_endian
>* got
6244 = target
->got_section(symtab
, layout
);
6245 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6246 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6247 elfcpp::R_POWERPC_DTPMOD
,
6248 elfcpp::R_POWERPC_DTPREL
);
6250 else if (tls_type
== tls::TLSOPT_TO_IE
)
6252 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6254 Output_data_got_powerpc
<size
, big_endian
>* got
6255 = target
->got_section(symtab
, layout
);
6256 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6257 if (gsym
->is_undefined()
6258 || gsym
->is_from_dynobj())
6260 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6261 elfcpp::R_POWERPC_TPREL
);
6265 unsigned int off
= got
->add_constant(0);
6266 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6267 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6268 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6273 else if (tls_type
== tls::TLSOPT_TO_LE
)
6275 // no GOT relocs needed for Local Exec.
6282 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6283 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6284 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6285 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6287 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6288 if (tls_type
== tls::TLSOPT_NONE
)
6289 target
->tlsld_got_offset(symtab
, layout
, object
);
6290 else if (tls_type
== tls::TLSOPT_TO_LE
)
6292 // no GOT relocs needed for Local Exec.
6293 if (parameters
->options().emit_relocs())
6295 Output_section
* os
= layout
->tls_segment()->first_section();
6296 gold_assert(os
!= NULL
);
6297 os
->set_needs_symtab_index();
6305 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6306 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6307 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6308 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6310 Output_data_got_powerpc
<size
, big_endian
>* got
6311 = target
->got_section(symtab
, layout
);
6312 if (!gsym
->final_value_is_known()
6313 && (gsym
->is_from_dynobj()
6314 || gsym
->is_undefined()
6315 || gsym
->is_preemptible()))
6316 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6317 target
->rela_dyn_section(layout
),
6318 elfcpp::R_POWERPC_DTPREL
);
6320 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6324 case elfcpp::R_POWERPC_GOT_TPREL16
:
6325 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6326 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6327 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6329 const bool final
= gsym
->final_value_is_known();
6330 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6331 if (tls_type
== tls::TLSOPT_NONE
)
6333 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6335 Output_data_got_powerpc
<size
, big_endian
>* got
6336 = target
->got_section(symtab
, layout
);
6337 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6338 if (gsym
->is_undefined()
6339 || gsym
->is_from_dynobj())
6341 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6342 elfcpp::R_POWERPC_TPREL
);
6346 unsigned int off
= got
->add_constant(0);
6347 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6348 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6349 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6354 else if (tls_type
== tls::TLSOPT_TO_LE
)
6356 // no GOT relocs needed for Local Exec.
6364 unsupported_reloc_global(object
, r_type
, gsym
);
6370 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6371 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6372 case elfcpp::R_POWERPC_GOT_TPREL16
:
6373 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6374 case elfcpp::R_POWERPC_GOT16
:
6375 case elfcpp::R_PPC64_GOT16_DS
:
6376 case elfcpp::R_PPC64_TOC16
:
6377 case elfcpp::R_PPC64_TOC16_DS
:
6378 ppc_object
->set_has_small_toc_reloc();
6384 // Process relocations for gc.
6386 template<int size
, bool big_endian
>
6388 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6389 Symbol_table
* symtab
,
6391 Sized_relobj_file
<size
, big_endian
>* object
,
6392 unsigned int data_shndx
,
6394 const unsigned char* prelocs
,
6396 Output_section
* output_section
,
6397 bool needs_special_offset_handling
,
6398 size_t local_symbol_count
,
6399 const unsigned char* plocal_symbols
)
6401 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6402 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6403 Powerpc_relobj
<size
, big_endian
>* ppc_object
6404 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6406 ppc_object
->set_opd_valid();
6407 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6409 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6410 for (p
= ppc_object
->access_from_map()->begin();
6411 p
!= ppc_object
->access_from_map()->end();
6414 Address dst_off
= p
->first
;
6415 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6416 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6417 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6419 Relobj
* src_obj
= s
->first
;
6420 unsigned int src_indx
= s
->second
;
6421 symtab
->gc()->add_reference(src_obj
, src_indx
,
6422 ppc_object
, dst_indx
);
6426 ppc_object
->access_from_map()->clear();
6427 ppc_object
->process_gc_mark(symtab
);
6428 // Don't look at .opd relocs as .opd will reference everything.
6432 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
6433 typename
Target_powerpc::Relocatable_size_for_reloc
>(
6442 needs_special_offset_handling
,
6447 // Handle target specific gc actions when adding a gc reference from
6448 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6449 // and DST_OFF. For powerpc64, this adds a referenc to the code
6450 // section of a function descriptor.
6452 template<int size
, bool big_endian
>
6454 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6455 Symbol_table
* symtab
,
6457 unsigned int src_shndx
,
6459 unsigned int dst_shndx
,
6460 Address dst_off
) const
6462 if (size
!= 64 || dst_obj
->is_dynamic())
6465 Powerpc_relobj
<size
, big_endian
>* ppc_object
6466 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6467 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6469 if (ppc_object
->opd_valid())
6471 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6472 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6476 // If we haven't run scan_opd_relocs, we must delay
6477 // processing this function descriptor reference.
6478 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6483 // Add any special sections for this symbol to the gc work list.
6484 // For powerpc64, this adds the code section of a function
6487 template<int size
, bool big_endian
>
6489 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6490 Symbol_table
* symtab
,
6495 Powerpc_relobj
<size
, big_endian
>* ppc_object
6496 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6498 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6499 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6501 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6502 Address dst_off
= gsym
->value();
6503 if (ppc_object
->opd_valid())
6505 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6506 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
6510 ppc_object
->add_gc_mark(dst_off
);
6515 // For a symbol location in .opd, set LOC to the location of the
6518 template<int size
, bool big_endian
>
6520 Target_powerpc
<size
, big_endian
>::do_function_location(
6521 Symbol_location
* loc
) const
6523 if (size
== 64 && loc
->shndx
!= 0)
6525 if (loc
->object
->is_dynamic())
6527 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6528 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6529 if (loc
->shndx
== ppc_object
->opd_shndx())
6532 Address off
= loc
->offset
- ppc_object
->opd_address();
6533 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6534 loc
->offset
= dest_off
;
6539 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6540 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6541 if (loc
->shndx
== ppc_object
->opd_shndx())
6544 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6545 loc
->offset
= dest_off
;
6551 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6552 // compiled with -fsplit-stack. The function calls non-split-stack
6553 // code. Change the function to ensure it has enough stack space to
6554 // call some random function.
6556 template<int size
, bool big_endian
>
6558 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
6561 section_offset_type fnoffset
,
6562 section_size_type fnsize
,
6563 unsigned char* view
,
6564 section_size_type view_size
,
6566 std::string
* to
) const
6568 // 32-bit not supported.
6572 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
6573 view
, view_size
, from
, to
);
6577 // The function always starts with
6578 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6579 // addis %r12,%r1,-allocate@ha
6580 // addi %r12,%r12,-allocate@l
6582 // but note that the addis or addi may be replaced with a nop
6584 unsigned char *entry
= view
+ fnoffset
;
6585 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6587 if ((insn
& 0xffff0000) == addis_2_12
)
6589 /* Skip ELFv2 global entry code. */
6591 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6594 unsigned char *pinsn
= entry
;
6596 const uint32_t ld_private_ss
= 0xe80d8fc0;
6597 if (insn
== ld_private_ss
)
6599 int32_t allocate
= 0;
6603 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
6604 if ((insn
& 0xffff0000) == addis_12_1
)
6605 allocate
+= (insn
& 0xffff) << 16;
6606 else if ((insn
& 0xffff0000) == addi_12_1
6607 || (insn
& 0xffff0000) == addi_12_12
)
6608 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
6609 else if (insn
!= nop
)
6612 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
6614 int extra
= parameters
->options().split_stack_adjust_size();
6616 if (allocate
>= 0 || extra
< 0)
6618 object
->error(_("split-stack stack size overflow at "
6619 "section %u offset %0zx"),
6620 shndx
, static_cast<size_t>(fnoffset
));
6624 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
6625 if (insn
!= addis_12_1
)
6627 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6629 insn
= addi_12_12
| (allocate
& 0xffff);
6630 if (insn
!= addi_12_12
)
6632 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6638 insn
= addi_12_1
| (allocate
& 0xffff);
6639 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6642 if (pinsn
!= entry
+ 12)
6643 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
6651 if (!object
->has_no_split_stack())
6652 object
->error(_("failed to match split-stack sequence at "
6653 "section %u offset %0zx"),
6654 shndx
, static_cast<size_t>(fnoffset
));
6658 // Scan relocations for a section.
6660 template<int size
, bool big_endian
>
6662 Target_powerpc
<size
, big_endian
>::scan_relocs(
6663 Symbol_table
* symtab
,
6665 Sized_relobj_file
<size
, big_endian
>* object
,
6666 unsigned int data_shndx
,
6667 unsigned int sh_type
,
6668 const unsigned char* prelocs
,
6670 Output_section
* output_section
,
6671 bool needs_special_offset_handling
,
6672 size_t local_symbol_count
,
6673 const unsigned char* plocal_symbols
)
6675 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6676 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6678 if (sh_type
== elfcpp::SHT_REL
)
6680 gold_error(_("%s: unsupported REL reloc section"),
6681 object
->name().c_str());
6685 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
6694 needs_special_offset_handling
,
6699 // Functor class for processing the global symbol table.
6700 // Removes symbols defined on discarded opd entries.
6702 template<bool big_endian
>
6703 class Global_symbol_visitor_opd
6706 Global_symbol_visitor_opd()
6710 operator()(Sized_symbol
<64>* sym
)
6712 if (sym
->has_symtab_index()
6713 || sym
->source() != Symbol::FROM_OBJECT
6714 || !sym
->in_real_elf())
6717 if (sym
->object()->is_dynamic())
6720 Powerpc_relobj
<64, big_endian
>* symobj
6721 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6722 if (symobj
->opd_shndx() == 0)
6726 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6727 if (shndx
== symobj
->opd_shndx()
6728 && symobj
->get_opd_discard(sym
->value()))
6730 sym
->set_undefined();
6731 sym
->set_visibility(elfcpp::STV_DEFAULT
);
6732 sym
->set_is_defined_in_discarded_section();
6733 sym
->set_symtab_index(-1U);
6738 template<int size
, bool big_endian
>
6740 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6742 Symbol_table
* symtab
)
6746 Output_data_save_res
<size
, big_endian
>* savres
6747 = new Output_data_save_res
<size
, big_endian
>(symtab
);
6748 this->savres_section_
= savres
;
6749 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6750 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6751 savres
, ORDER_TEXT
, false);
6755 // Sort linker created .got section first (for the header), then input
6756 // sections belonging to files using small model code.
6758 template<bool big_endian
>
6759 class Sort_toc_sections
6763 operator()(const Output_section::Input_section
& is1
,
6764 const Output_section::Input_section
& is2
) const
6766 if (!is1
.is_input_section() && is2
.is_input_section())
6769 = (is1
.is_input_section()
6770 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6771 ->has_small_toc_reloc()));
6773 = (is2
.is_input_section()
6774 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6775 ->has_small_toc_reloc()));
6776 return small1
&& !small2
;
6780 // Finalize the sections.
6782 template<int size
, bool big_endian
>
6784 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6786 const Input_objects
*,
6787 Symbol_table
* symtab
)
6789 if (parameters
->doing_static_link())
6791 // At least some versions of glibc elf-init.o have a strong
6792 // reference to __rela_iplt marker syms. A weak ref would be
6794 if (this->iplt_
!= NULL
)
6796 Reloc_section
* rel
= this->iplt_
->rel_plt();
6797 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6798 Symbol_table::PREDEFINED
, rel
, 0, 0,
6799 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6800 elfcpp::STV_HIDDEN
, 0, false, true);
6801 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6802 Symbol_table::PREDEFINED
, rel
, 0, 0,
6803 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6804 elfcpp::STV_HIDDEN
, 0, true, true);
6808 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6809 Symbol_table::PREDEFINED
, 0, 0,
6810 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6811 elfcpp::STV_HIDDEN
, 0, true, false);
6812 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6813 Symbol_table::PREDEFINED
, 0, 0,
6814 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6815 elfcpp::STV_HIDDEN
, 0, true, false);
6821 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6822 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6824 if (!parameters
->options().relocatable())
6826 this->define_save_restore_funcs(layout
, symtab
);
6828 // Annoyingly, we need to make these sections now whether or
6829 // not we need them. If we delay until do_relax then we
6830 // need to mess with the relaxation machinery checkpointing.
6831 this->got_section(symtab
, layout
);
6832 this->make_brlt_section(layout
);
6834 if (parameters
->options().toc_sort())
6836 Output_section
* os
= this->got_
->output_section();
6837 if (os
!= NULL
&& os
->input_sections().size() > 1)
6838 std::stable_sort(os
->input_sections().begin(),
6839 os
->input_sections().end(),
6840 Sort_toc_sections
<big_endian
>());
6845 // Fill in some more dynamic tags.
6846 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6849 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6851 : this->plt_
->rel_plt());
6852 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6853 this->rela_dyn_
, true, size
== 32);
6857 if (this->got_
!= NULL
)
6859 this->got_
->finalize_data_size();
6860 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6861 this->got_
, this->got_
->g_o_t());
6866 if (this->glink_
!= NULL
)
6868 this->glink_
->finalize_data_size();
6869 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6871 (this->glink_
->pltresolve_size
6877 // Emit any relocs we saved in an attempt to avoid generating COPY
6879 if (this->copy_relocs_
.any_saved_relocs())
6880 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6883 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6887 ok_lo_toc_insn(uint32_t insn
)
6889 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6890 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6891 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6892 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6893 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6894 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6895 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6896 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6897 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6898 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6899 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6900 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6901 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6902 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6903 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6905 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6906 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6907 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6910 // Return the value to use for a branch relocation.
6912 template<int size
, bool big_endian
>
6914 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6915 const Symbol_table
* symtab
,
6916 const Sized_symbol
<size
>* gsym
,
6917 Powerpc_relobj
<size
, big_endian
>* object
,
6919 unsigned int *dest_shndx
)
6921 if (size
== 32 || this->abiversion() >= 2)
6925 // If the symbol is defined in an opd section, ie. is a function
6926 // descriptor, use the function descriptor code entry address
6927 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6929 && gsym
->source() != Symbol::FROM_OBJECT
)
6932 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6933 unsigned int shndx
= symobj
->opd_shndx();
6936 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6937 if (opd_addr
== invalid_address
)
6939 opd_addr
+= symobj
->output_section_address(shndx
);
6940 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
6943 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
6944 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6947 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6948 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6949 *dest_shndx
= folded
.second
;
6951 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6952 if (sec_addr
== invalid_address
)
6955 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6956 *value
= sec_addr
+ sec_off
;
6961 // Perform a relocation.
6963 template<int size
, bool big_endian
>
6965 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6966 const Relocate_info
<size
, big_endian
>* relinfo
,
6967 Target_powerpc
* target
,
6970 const elfcpp::Rela
<size
, big_endian
>& rela
,
6971 unsigned int r_type
,
6972 const Sized_symbol
<size
>* gsym
,
6973 const Symbol_value
<size
>* psymval
,
6974 unsigned char* view
,
6976 section_size_type view_size
)
6981 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6983 case Track_tls::NOT_EXPECTED
:
6984 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6985 _("__tls_get_addr call lacks marker reloc"));
6987 case Track_tls::EXPECTED
:
6988 // We have already complained.
6990 case Track_tls::SKIP
:
6992 case Track_tls::NORMAL
:
6996 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6997 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6998 Powerpc_relobj
<size
, big_endian
>* const object
6999 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7001 bool has_stub_value
= false;
7002 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7004 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7005 : object
->local_has_plt_offset(r_sym
))
7006 && (!psymval
->is_ifunc_symbol()
7007 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7011 && target
->abiversion() >= 2
7012 && !parameters
->options().output_is_position_independent()
7013 && !is_branch_reloc(r_type
))
7015 Address off
= target
->glink_section()->find_global_entry(gsym
);
7016 if (off
!= invalid_address
)
7018 value
= target
->glink_section()->global_entry_address() + off
;
7019 has_stub_value
= true;
7024 Stub_table
<size
, big_endian
>* stub_table
7025 = object
->stub_table(relinfo
->data_shndx
);
7026 if (stub_table
== NULL
)
7028 // This is a ref from a data section to an ifunc symbol.
7029 if (target
->stub_tables().size() != 0)
7030 stub_table
= target
->stub_tables()[0];
7032 if (stub_table
!= NULL
)
7036 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7037 rela
.get_r_addend());
7039 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7040 rela
.get_r_addend());
7041 if (off
!= invalid_address
)
7043 value
= stub_table
->stub_address() + off
;
7044 has_stub_value
= true;
7048 // We don't care too much about bogus debug references to
7049 // non-local functions, but otherwise there had better be a plt
7050 // call stub or global entry stub as appropriate.
7051 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7054 if (r_type
== elfcpp::R_POWERPC_GOT16
7055 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7056 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7057 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7058 || r_type
== elfcpp::R_PPC64_GOT16_DS
7059 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7063 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7064 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7068 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7069 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7070 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7072 value
-= target
->got_section()->got_base_offset(object
);
7074 else if (r_type
== elfcpp::R_PPC64_TOC
)
7076 value
= (target
->got_section()->output_section()->address()
7077 + object
->toc_base_offset());
7079 else if (gsym
!= NULL
7080 && (r_type
== elfcpp::R_POWERPC_REL24
7081 || r_type
== elfcpp::R_PPC_PLTREL24
)
7086 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7087 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7088 bool can_plt_call
= false;
7089 if (rela
.get_r_offset() + 8 <= view_size
)
7091 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7092 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7095 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7097 elfcpp::Swap
<32, big_endian
>::
7098 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7099 can_plt_call
= true;
7104 // If we don't have a branch and link followed by a nop,
7105 // we can't go via the plt because there is no place to
7106 // put a toc restoring instruction.
7107 // Unless we know we won't be returning.
7108 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7109 can_plt_call
= true;
7113 // g++ as of 20130507 emits self-calls without a
7114 // following nop. This is arguably wrong since we have
7115 // conflicting information. On the one hand a global
7116 // symbol and on the other a local call sequence, but
7117 // don't error for this special case.
7118 // It isn't possible to cheaply verify we have exactly
7119 // such a call. Allow all calls to the same section.
7121 Address code
= value
;
7122 if (gsym
->source() == Symbol::FROM_OBJECT
7123 && gsym
->object() == object
)
7125 unsigned int dest_shndx
= 0;
7126 if (target
->abiversion() < 2)
7128 Address addend
= rela
.get_r_addend();
7129 code
= psymval
->value(object
, addend
);
7130 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7131 &code
, &dest_shndx
);
7134 if (dest_shndx
== 0)
7135 dest_shndx
= gsym
->shndx(&is_ordinary
);
7136 ok
= dest_shndx
== relinfo
->data_shndx
;
7140 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7141 _("call lacks nop, can't restore toc; "
7142 "recompile with -fPIC"));
7148 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7149 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7150 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7151 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7153 // First instruction of a global dynamic sequence, arg setup insn.
7154 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7155 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7156 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7157 if (tls_type
== tls::TLSOPT_NONE
)
7158 got_type
= GOT_TYPE_TLSGD
;
7159 else if (tls_type
== tls::TLSOPT_TO_IE
)
7160 got_type
= GOT_TYPE_TPREL
;
7161 if (got_type
!= GOT_TYPE_STANDARD
)
7165 gold_assert(gsym
->has_got_offset(got_type
));
7166 value
= gsym
->got_offset(got_type
);
7170 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7171 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7172 value
= object
->local_got_offset(r_sym
, got_type
);
7174 value
-= target
->got_section()->got_base_offset(object
);
7176 if (tls_type
== tls::TLSOPT_TO_IE
)
7178 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7179 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7181 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7182 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7183 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7185 insn
|= 32 << 26; // lwz
7187 insn
|= 58 << 26; // ld
7188 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7190 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7191 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7193 else if (tls_type
== tls::TLSOPT_TO_LE
)
7195 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7196 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7198 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7199 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7200 insn
&= (1 << 26) - (1 << 21); // extract rt
7205 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7206 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7207 value
= psymval
->value(object
, rela
.get_r_addend());
7211 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7213 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7214 r_type
= elfcpp::R_POWERPC_NONE
;
7218 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7219 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7220 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7221 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7223 // First instruction of a local dynamic sequence, arg setup insn.
7224 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7225 if (tls_type
== tls::TLSOPT_NONE
)
7227 value
= target
->tlsld_got_offset();
7228 value
-= target
->got_section()->got_base_offset(object
);
7232 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7233 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7234 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7236 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7237 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7238 insn
&= (1 << 26) - (1 << 21); // extract rt
7243 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7244 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7249 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7251 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7252 r_type
= elfcpp::R_POWERPC_NONE
;
7256 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7257 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7258 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7259 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7261 // Accesses relative to a local dynamic sequence address,
7262 // no optimisation here.
7265 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7266 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7270 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7271 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7272 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7274 value
-= target
->got_section()->got_base_offset(object
);
7276 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7277 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7278 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7279 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7281 // First instruction of initial exec sequence.
7282 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7283 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7284 if (tls_type
== tls::TLSOPT_NONE
)
7288 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7289 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7293 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7294 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7295 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7297 value
-= target
->got_section()->got_base_offset(object
);
7301 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7302 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7303 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7305 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7306 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7307 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7312 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7313 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7314 value
= psymval
->value(object
, rela
.get_r_addend());
7318 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7320 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7321 r_type
= elfcpp::R_POWERPC_NONE
;
7325 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7326 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7328 // Second instruction of a global dynamic sequence,
7329 // the __tls_get_addr call
7330 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7331 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7332 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7333 if (tls_type
!= tls::TLSOPT_NONE
)
7335 if (tls_type
== tls::TLSOPT_TO_IE
)
7337 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7338 Insn insn
= add_3_3_13
;
7341 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7342 r_type
= elfcpp::R_POWERPC_NONE
;
7346 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7347 Insn insn
= addi_3_3
;
7348 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7349 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7350 view
+= 2 * big_endian
;
7351 value
= psymval
->value(object
, rela
.get_r_addend());
7353 this->skip_next_tls_get_addr_call();
7356 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7357 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7359 // Second instruction of a local dynamic sequence,
7360 // the __tls_get_addr call
7361 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7362 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7363 if (tls_type
== tls::TLSOPT_TO_LE
)
7365 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7366 Insn insn
= addi_3_3
;
7367 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7368 this->skip_next_tls_get_addr_call();
7369 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7370 view
+= 2 * big_endian
;
7374 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7376 // Second instruction of an initial exec sequence
7377 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7378 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7379 if (tls_type
== tls::TLSOPT_TO_LE
)
7381 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7382 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7383 unsigned int reg
= size
== 32 ? 2 : 13;
7384 insn
= at_tls_transform(insn
, reg
);
7385 gold_assert(insn
!= 0);
7386 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7387 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7388 view
+= 2 * big_endian
;
7389 value
= psymval
->value(object
, rela
.get_r_addend());
7392 else if (!has_stub_value
)
7395 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
7396 addend
= rela
.get_r_addend();
7397 value
= psymval
->value(object
, addend
);
7398 if (size
== 64 && is_branch_reloc(r_type
))
7400 if (target
->abiversion() >= 2)
7403 value
+= object
->ppc64_local_entry_offset(gsym
);
7405 value
+= object
->ppc64_local_entry_offset(r_sym
);
7409 unsigned int dest_shndx
;
7410 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7411 &value
, &dest_shndx
);
7414 Address max_branch_offset
= max_branch_delta(r_type
);
7415 if (max_branch_offset
!= 0
7416 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7418 Stub_table
<size
, big_endian
>* stub_table
7419 = object
->stub_table(relinfo
->data_shndx
);
7420 if (stub_table
!= NULL
)
7422 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7423 if (off
!= invalid_address
)
7425 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7427 has_stub_value
= true;
7435 case elfcpp::R_PPC64_REL64
:
7436 case elfcpp::R_POWERPC_REL32
:
7437 case elfcpp::R_POWERPC_REL24
:
7438 case elfcpp::R_PPC_PLTREL24
:
7439 case elfcpp::R_PPC_LOCAL24PC
:
7440 case elfcpp::R_POWERPC_REL16
:
7441 case elfcpp::R_POWERPC_REL16_LO
:
7442 case elfcpp::R_POWERPC_REL16_HI
:
7443 case elfcpp::R_POWERPC_REL16_HA
:
7444 case elfcpp::R_POWERPC_REL14
:
7445 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7446 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7450 case elfcpp::R_PPC64_TOC16
:
7451 case elfcpp::R_PPC64_TOC16_LO
:
7452 case elfcpp::R_PPC64_TOC16_HI
:
7453 case elfcpp::R_PPC64_TOC16_HA
:
7454 case elfcpp::R_PPC64_TOC16_DS
:
7455 case elfcpp::R_PPC64_TOC16_LO_DS
:
7456 // Subtract the TOC base address.
7457 value
-= (target
->got_section()->output_section()->address()
7458 + object
->toc_base_offset());
7461 case elfcpp::R_POWERPC_SECTOFF
:
7462 case elfcpp::R_POWERPC_SECTOFF_LO
:
7463 case elfcpp::R_POWERPC_SECTOFF_HI
:
7464 case elfcpp::R_POWERPC_SECTOFF_HA
:
7465 case elfcpp::R_PPC64_SECTOFF_DS
:
7466 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7468 value
-= os
->address();
7471 case elfcpp::R_PPC64_TPREL16_DS
:
7472 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7473 case elfcpp::R_PPC64_TPREL16_HIGH
:
7474 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7476 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7478 case elfcpp::R_POWERPC_TPREL16
:
7479 case elfcpp::R_POWERPC_TPREL16_LO
:
7480 case elfcpp::R_POWERPC_TPREL16_HI
:
7481 case elfcpp::R_POWERPC_TPREL16_HA
:
7482 case elfcpp::R_POWERPC_TPREL
:
7483 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7484 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7485 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7486 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7487 // tls symbol values are relative to tls_segment()->vaddr()
7491 case elfcpp::R_PPC64_DTPREL16_DS
:
7492 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7493 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7494 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7495 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7496 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7498 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7499 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7501 case elfcpp::R_POWERPC_DTPREL16
:
7502 case elfcpp::R_POWERPC_DTPREL16_LO
:
7503 case elfcpp::R_POWERPC_DTPREL16_HI
:
7504 case elfcpp::R_POWERPC_DTPREL16_HA
:
7505 case elfcpp::R_POWERPC_DTPREL
:
7506 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7507 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7508 // tls symbol values are relative to tls_segment()->vaddr()
7509 value
-= dtp_offset
;
7512 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7514 value
+= object
->ppc64_local_entry_offset(gsym
);
7516 value
+= object
->ppc64_local_entry_offset(r_sym
);
7523 Insn branch_bit
= 0;
7526 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7527 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7528 branch_bit
= 1 << 21;
7529 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7530 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7532 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7533 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7536 if (this->is_isa_v2
)
7538 // Set 'a' bit. This is 0b00010 in BO field for branch
7539 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7540 // for branch on CTR insns (BO == 1a00t or 1a01t).
7541 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7543 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7550 // Invert 'y' bit if not the default.
7551 if (static_cast<Signed_address
>(value
) < 0)
7554 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7564 // Multi-instruction sequences that access the TOC can be
7565 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7566 // to nop; addi rb,r2,x;
7572 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7573 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7574 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7575 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7576 case elfcpp::R_POWERPC_GOT16_HA
:
7577 case elfcpp::R_PPC64_TOC16_HA
:
7578 if (parameters
->options().toc_optimize())
7580 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7581 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7582 if ((insn
& ((0x3f << 26) | 0x1f << 16))
7583 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7584 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7585 _("toc optimization is not supported "
7586 "for %#08x instruction"), insn
);
7587 else if (value
+ 0x8000 < 0x10000)
7589 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7595 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7596 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7597 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7598 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7599 case elfcpp::R_POWERPC_GOT16_LO
:
7600 case elfcpp::R_PPC64_GOT16_LO_DS
:
7601 case elfcpp::R_PPC64_TOC16_LO
:
7602 case elfcpp::R_PPC64_TOC16_LO_DS
:
7603 if (parameters
->options().toc_optimize())
7605 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7606 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7607 if (!ok_lo_toc_insn(insn
))
7608 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7609 _("toc optimization is not supported "
7610 "for %#08x instruction"), insn
);
7611 else if (value
+ 0x8000 < 0x10000)
7613 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7615 // Transform addic to addi when we change reg.
7616 insn
&= ~((0x3f << 26) | (0x1f << 16));
7617 insn
|= (14u << 26) | (2 << 16);
7621 insn
&= ~(0x1f << 16);
7624 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7631 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7632 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
7635 case elfcpp::R_POWERPC_ADDR32
:
7636 case elfcpp::R_POWERPC_UADDR32
:
7638 overflow
= Reloc::CHECK_BITFIELD
;
7641 case elfcpp::R_POWERPC_REL32
:
7643 overflow
= Reloc::CHECK_SIGNED
;
7646 case elfcpp::R_POWERPC_UADDR16
:
7647 overflow
= Reloc::CHECK_BITFIELD
;
7650 case elfcpp::R_POWERPC_ADDR16
:
7651 // We really should have three separate relocations,
7652 // one for 16-bit data, one for insns with 16-bit signed fields,
7653 // and one for insns with 16-bit unsigned fields.
7654 overflow
= Reloc::CHECK_BITFIELD
;
7655 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
7656 overflow
= Reloc::CHECK_LOW_INSN
;
7659 case elfcpp::R_POWERPC_ADDR16_HI
:
7660 case elfcpp::R_POWERPC_ADDR16_HA
:
7661 case elfcpp::R_POWERPC_GOT16_HI
:
7662 case elfcpp::R_POWERPC_GOT16_HA
:
7663 case elfcpp::R_POWERPC_PLT16_HI
:
7664 case elfcpp::R_POWERPC_PLT16_HA
:
7665 case elfcpp::R_POWERPC_SECTOFF_HI
:
7666 case elfcpp::R_POWERPC_SECTOFF_HA
:
7667 case elfcpp::R_PPC64_TOC16_HI
:
7668 case elfcpp::R_PPC64_TOC16_HA
:
7669 case elfcpp::R_PPC64_PLTGOT16_HI
:
7670 case elfcpp::R_PPC64_PLTGOT16_HA
:
7671 case elfcpp::R_POWERPC_TPREL16_HI
:
7672 case elfcpp::R_POWERPC_TPREL16_HA
:
7673 case elfcpp::R_POWERPC_DTPREL16_HI
:
7674 case elfcpp::R_POWERPC_DTPREL16_HA
:
7675 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7676 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7677 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7678 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7679 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7680 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7681 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7682 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7683 case elfcpp::R_POWERPC_REL16_HI
:
7684 case elfcpp::R_POWERPC_REL16_HA
:
7686 overflow
= Reloc::CHECK_HIGH_INSN
;
7689 case elfcpp::R_POWERPC_REL16
:
7690 case elfcpp::R_PPC64_TOC16
:
7691 case elfcpp::R_POWERPC_GOT16
:
7692 case elfcpp::R_POWERPC_SECTOFF
:
7693 case elfcpp::R_POWERPC_TPREL16
:
7694 case elfcpp::R_POWERPC_DTPREL16
:
7695 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7696 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7697 case elfcpp::R_POWERPC_GOT_TPREL16
:
7698 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7699 overflow
= Reloc::CHECK_LOW_INSN
;
7702 case elfcpp::R_POWERPC_ADDR24
:
7703 case elfcpp::R_POWERPC_ADDR14
:
7704 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7705 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7706 case elfcpp::R_PPC64_ADDR16_DS
:
7707 case elfcpp::R_POWERPC_REL24
:
7708 case elfcpp::R_PPC_PLTREL24
:
7709 case elfcpp::R_PPC_LOCAL24PC
:
7710 case elfcpp::R_PPC64_TPREL16_DS
:
7711 case elfcpp::R_PPC64_DTPREL16_DS
:
7712 case elfcpp::R_PPC64_TOC16_DS
:
7713 case elfcpp::R_PPC64_GOT16_DS
:
7714 case elfcpp::R_PPC64_SECTOFF_DS
:
7715 case elfcpp::R_POWERPC_REL14
:
7716 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7717 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7718 overflow
= Reloc::CHECK_SIGNED
;
7722 if (overflow
== Reloc::CHECK_LOW_INSN
7723 || overflow
== Reloc::CHECK_HIGH_INSN
)
7725 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7726 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7728 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
7729 overflow
= Reloc::CHECK_BITFIELD
;
7730 else if (overflow
== Reloc::CHECK_LOW_INSN
7731 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
7732 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
7733 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
7734 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
7735 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
7736 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
7737 overflow
= Reloc::CHECK_UNSIGNED
;
7739 overflow
= Reloc::CHECK_SIGNED
;
7742 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7743 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7746 case elfcpp::R_POWERPC_NONE
:
7747 case elfcpp::R_POWERPC_TLS
:
7748 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7749 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7752 case elfcpp::R_PPC64_ADDR64
:
7753 case elfcpp::R_PPC64_REL64
:
7754 case elfcpp::R_PPC64_TOC
:
7755 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7756 Reloc::addr64(view
, value
);
7759 case elfcpp::R_POWERPC_TPREL
:
7760 case elfcpp::R_POWERPC_DTPREL
:
7762 Reloc::addr64(view
, value
);
7764 status
= Reloc::addr32(view
, value
, overflow
);
7767 case elfcpp::R_PPC64_UADDR64
:
7768 Reloc::addr64_u(view
, value
);
7771 case elfcpp::R_POWERPC_ADDR32
:
7772 status
= Reloc::addr32(view
, value
, overflow
);
7775 case elfcpp::R_POWERPC_REL32
:
7776 case elfcpp::R_POWERPC_UADDR32
:
7777 status
= Reloc::addr32_u(view
, value
, overflow
);
7780 case elfcpp::R_POWERPC_ADDR24
:
7781 case elfcpp::R_POWERPC_REL24
:
7782 case elfcpp::R_PPC_PLTREL24
:
7783 case elfcpp::R_PPC_LOCAL24PC
:
7784 status
= Reloc::addr24(view
, value
, overflow
);
7787 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7788 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7789 case elfcpp::R_POWERPC_GOT_TPREL16
:
7790 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7793 // On ppc64 these are all ds form
7794 status
= Reloc::addr16_ds(view
, value
, overflow
);
7797 case elfcpp::R_POWERPC_ADDR16
:
7798 case elfcpp::R_POWERPC_REL16
:
7799 case elfcpp::R_PPC64_TOC16
:
7800 case elfcpp::R_POWERPC_GOT16
:
7801 case elfcpp::R_POWERPC_SECTOFF
:
7802 case elfcpp::R_POWERPC_TPREL16
:
7803 case elfcpp::R_POWERPC_DTPREL16
:
7804 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7805 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7806 case elfcpp::R_POWERPC_ADDR16_LO
:
7807 case elfcpp::R_POWERPC_REL16_LO
:
7808 case elfcpp::R_PPC64_TOC16_LO
:
7809 case elfcpp::R_POWERPC_GOT16_LO
:
7810 case elfcpp::R_POWERPC_SECTOFF_LO
:
7811 case elfcpp::R_POWERPC_TPREL16_LO
:
7812 case elfcpp::R_POWERPC_DTPREL16_LO
:
7813 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7814 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7815 status
= Reloc::addr16(view
, value
, overflow
);
7818 case elfcpp::R_POWERPC_UADDR16
:
7819 status
= Reloc::addr16_u(view
, value
, overflow
);
7822 case elfcpp::R_PPC64_ADDR16_HIGH
:
7823 case elfcpp::R_PPC64_TPREL16_HIGH
:
7824 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7826 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7828 case elfcpp::R_POWERPC_ADDR16_HI
:
7829 case elfcpp::R_POWERPC_REL16_HI
:
7830 case elfcpp::R_PPC64_TOC16_HI
:
7831 case elfcpp::R_POWERPC_GOT16_HI
:
7832 case elfcpp::R_POWERPC_SECTOFF_HI
:
7833 case elfcpp::R_POWERPC_TPREL16_HI
:
7834 case elfcpp::R_POWERPC_DTPREL16_HI
:
7835 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7836 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7837 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7838 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7839 Reloc::addr16_hi(view
, value
);
7842 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7843 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7844 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7846 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7848 case elfcpp::R_POWERPC_ADDR16_HA
:
7849 case elfcpp::R_POWERPC_REL16_HA
:
7850 case elfcpp::R_PPC64_TOC16_HA
:
7851 case elfcpp::R_POWERPC_GOT16_HA
:
7852 case elfcpp::R_POWERPC_SECTOFF_HA
:
7853 case elfcpp::R_POWERPC_TPREL16_HA
:
7854 case elfcpp::R_POWERPC_DTPREL16_HA
:
7855 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7856 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7857 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7858 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7859 Reloc::addr16_ha(view
, value
);
7862 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7864 // R_PPC_EMB_NADDR16_LO
7866 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7867 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7868 Reloc::addr16_hi2(view
, value
);
7871 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7873 // R_PPC_EMB_NADDR16_HI
7875 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7876 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7877 Reloc::addr16_ha2(view
, value
);
7880 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7882 // R_PPC_EMB_NADDR16_HA
7884 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7885 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7886 Reloc::addr16_hi3(view
, value
);
7889 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7893 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7894 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7895 Reloc::addr16_ha3(view
, value
);
7898 case elfcpp::R_PPC64_DTPREL16_DS
:
7899 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7901 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7903 case elfcpp::R_PPC64_TPREL16_DS
:
7904 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7906 // R_PPC_TLSGD, R_PPC_TLSLD
7908 case elfcpp::R_PPC64_ADDR16_DS
:
7909 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7910 case elfcpp::R_PPC64_TOC16_DS
:
7911 case elfcpp::R_PPC64_TOC16_LO_DS
:
7912 case elfcpp::R_PPC64_GOT16_DS
:
7913 case elfcpp::R_PPC64_GOT16_LO_DS
:
7914 case elfcpp::R_PPC64_SECTOFF_DS
:
7915 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7916 status
= Reloc::addr16_ds(view
, value
, overflow
);
7919 case elfcpp::R_POWERPC_ADDR14
:
7920 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7921 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7922 case elfcpp::R_POWERPC_REL14
:
7923 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7924 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7925 status
= Reloc::addr14(view
, value
, overflow
);
7928 case elfcpp::R_POWERPC_COPY
:
7929 case elfcpp::R_POWERPC_GLOB_DAT
:
7930 case elfcpp::R_POWERPC_JMP_SLOT
:
7931 case elfcpp::R_POWERPC_RELATIVE
:
7932 case elfcpp::R_POWERPC_DTPMOD
:
7933 case elfcpp::R_PPC64_JMP_IREL
:
7934 case elfcpp::R_POWERPC_IRELATIVE
:
7935 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7936 _("unexpected reloc %u in object file"),
7940 case elfcpp::R_PPC_EMB_SDA21
:
7945 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7949 case elfcpp::R_PPC_EMB_SDA2I16
:
7950 case elfcpp::R_PPC_EMB_SDA2REL
:
7953 // R_PPC64_TLSGD, R_PPC64_TLSLD
7956 case elfcpp::R_POWERPC_PLT32
:
7957 case elfcpp::R_POWERPC_PLTREL32
:
7958 case elfcpp::R_POWERPC_PLT16_LO
:
7959 case elfcpp::R_POWERPC_PLT16_HI
:
7960 case elfcpp::R_POWERPC_PLT16_HA
:
7961 case elfcpp::R_PPC_SDAREL16
:
7962 case elfcpp::R_POWERPC_ADDR30
:
7963 case elfcpp::R_PPC64_PLT64
:
7964 case elfcpp::R_PPC64_PLTREL64
:
7965 case elfcpp::R_PPC64_PLTGOT16
:
7966 case elfcpp::R_PPC64_PLTGOT16_LO
:
7967 case elfcpp::R_PPC64_PLTGOT16_HI
:
7968 case elfcpp::R_PPC64_PLTGOT16_HA
:
7969 case elfcpp::R_PPC64_PLT16_LO_DS
:
7970 case elfcpp::R_PPC64_PLTGOT16_DS
:
7971 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7972 case elfcpp::R_PPC_EMB_RELSDA
:
7973 case elfcpp::R_PPC_TOC16
:
7976 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7977 _("unsupported reloc %u"),
7981 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
7984 && gsym
->is_undefined()
7985 && is_branch_reloc(r_type
))))
7987 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7988 _("relocation overflow"));
7990 gold_info(_("try relinking with a smaller --stub-group-size"));
7996 // Relocate section data.
7998 template<int size
, bool big_endian
>
8000 Target_powerpc
<size
, big_endian
>::relocate_section(
8001 const Relocate_info
<size
, big_endian
>* relinfo
,
8002 unsigned int sh_type
,
8003 const unsigned char* prelocs
,
8005 Output_section
* output_section
,
8006 bool needs_special_offset_handling
,
8007 unsigned char* view
,
8009 section_size_type view_size
,
8010 const Reloc_symbol_changes
* reloc_symbol_changes
)
8012 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8013 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8014 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8015 Powerpc_comdat_behavior
;
8017 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8019 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
8020 Powerpc_relocate
, Powerpc_comdat_behavior
>(
8026 needs_special_offset_handling
,
8030 reloc_symbol_changes
);
8033 class Powerpc_scan_relocatable_reloc
8036 // Return the strategy to use for a local symbol which is not a
8037 // section symbol, given the relocation type.
8038 inline Relocatable_relocs::Reloc_strategy
8039 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8041 if (r_type
== 0 && r_sym
== 0)
8042 return Relocatable_relocs::RELOC_DISCARD
;
8043 return Relocatable_relocs::RELOC_COPY
;
8046 // Return the strategy to use for a local symbol which is a section
8047 // symbol, given the relocation type.
8048 inline Relocatable_relocs::Reloc_strategy
8049 local_section_strategy(unsigned int, Relobj
*)
8051 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8054 // Return the strategy to use for a global symbol, given the
8055 // relocation type, the object, and the symbol index.
8056 inline Relocatable_relocs::Reloc_strategy
8057 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8059 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8060 return Relocatable_relocs::RELOC_SPECIAL
;
8061 return Relocatable_relocs::RELOC_COPY
;
8065 // Scan the relocs during a relocatable link.
8067 template<int size
, bool big_endian
>
8069 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8070 Symbol_table
* symtab
,
8072 Sized_relobj_file
<size
, big_endian
>* object
,
8073 unsigned int data_shndx
,
8074 unsigned int sh_type
,
8075 const unsigned char* prelocs
,
8077 Output_section
* output_section
,
8078 bool needs_special_offset_handling
,
8079 size_t local_symbol_count
,
8080 const unsigned char* plocal_symbols
,
8081 Relocatable_relocs
* rr
)
8083 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8085 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
8086 Powerpc_scan_relocatable_reloc
>(
8094 needs_special_offset_handling
,
8100 // Emit relocations for a section.
8101 // This is a modified version of the function by the same name in
8102 // target-reloc.h. Using relocate_special_relocatable for
8103 // R_PPC_PLTREL24 would require duplication of the entire body of the
8104 // loop, so we may as well duplicate the whole thing.
8106 template<int size
, bool big_endian
>
8108 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8109 const Relocate_info
<size
, big_endian
>* relinfo
,
8110 unsigned int sh_type
,
8111 const unsigned char* prelocs
,
8113 Output_section
* output_section
,
8114 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8115 const Relocatable_relocs
* rr
,
8117 Address view_address
,
8119 unsigned char* reloc_view
,
8120 section_size_type reloc_view_size
)
8122 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8124 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8126 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
8128 const int reloc_size
8129 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8131 Powerpc_relobj
<size
, big_endian
>* const object
8132 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8133 const unsigned int local_count
= object
->local_symbol_count();
8134 unsigned int got2_shndx
= object
->got2_shndx();
8135 Address got2_addend
= 0;
8136 if (got2_shndx
!= 0)
8138 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8139 gold_assert(got2_addend
!= invalid_address
);
8142 unsigned char* pwrite
= reloc_view
;
8143 bool zap_next
= false;
8144 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8146 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
8147 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8150 Reltype
reloc(prelocs
);
8151 Reltype_write
reloc_write(pwrite
);
8153 Address offset
= reloc
.get_r_offset();
8154 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8155 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8156 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8157 const unsigned int orig_r_sym
= r_sym
;
8158 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8159 = reloc
.get_r_addend();
8160 const Symbol
* gsym
= NULL
;
8164 // We could arrange to discard these and other relocs for
8165 // tls optimised sequences in the strategy methods, but for
8166 // now do as BFD ld does.
8167 r_type
= elfcpp::R_POWERPC_NONE
;
8171 // Get the new symbol index.
8172 Output_section
* os
= NULL
;
8173 if (r_sym
< local_count
)
8177 case Relocatable_relocs::RELOC_COPY
:
8178 case Relocatable_relocs::RELOC_SPECIAL
:
8181 r_sym
= object
->symtab_index(r_sym
);
8182 gold_assert(r_sym
!= -1U);
8186 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
8188 // We are adjusting a section symbol. We need to find
8189 // the symbol table index of the section symbol for
8190 // the output section corresponding to input section
8191 // in which this symbol is defined.
8192 gold_assert(r_sym
< local_count
);
8194 unsigned int shndx
=
8195 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8196 gold_assert(is_ordinary
);
8197 os
= object
->output_section(shndx
);
8198 gold_assert(os
!= NULL
);
8199 gold_assert(os
->needs_symtab_index());
8200 r_sym
= os
->symtab_index();
8210 gsym
= object
->global_symbol(r_sym
);
8211 gold_assert(gsym
!= NULL
);
8212 if (gsym
->is_forwarder())
8213 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
8215 gold_assert(gsym
->has_symtab_index());
8216 r_sym
= gsym
->symtab_index();
8219 // Get the new offset--the location in the output section where
8220 // this relocation should be applied.
8221 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8222 offset
+= offset_in_output_section
;
8225 section_offset_type sot_offset
=
8226 convert_types
<section_offset_type
, Address
>(offset
);
8227 section_offset_type new_sot_offset
=
8228 output_section
->output_offset(object
, relinfo
->data_shndx
,
8230 gold_assert(new_sot_offset
!= -1);
8231 offset
= new_sot_offset
;
8234 // In an object file, r_offset is an offset within the section.
8235 // In an executable or dynamic object, generated by
8236 // --emit-relocs, r_offset is an absolute address.
8237 if (!parameters
->options().relocatable())
8239 offset
+= view_address
;
8240 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8241 offset
-= offset_in_output_section
;
8244 // Handle the reloc addend based on the strategy.
8245 if (strategy
== Relocatable_relocs::RELOC_COPY
)
8247 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
8249 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
8250 gold_assert(os
!= NULL
);
8251 addend
= psymval
->value(object
, addend
) - os
->address();
8253 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
8255 if (addend
>= 32768)
8256 addend
+= got2_addend
;
8261 if (!parameters
->options().relocatable())
8263 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8264 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8265 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8266 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8268 // First instruction of a global dynamic sequence,
8270 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8271 switch (this->optimize_tls_gd(final
))
8273 case tls::TLSOPT_TO_IE
:
8274 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8275 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8277 case tls::TLSOPT_TO_LE
:
8278 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8279 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8280 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8283 r_type
= elfcpp::R_POWERPC_NONE
;
8284 offset
-= 2 * big_endian
;
8291 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8292 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8293 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8294 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8296 // First instruction of a local dynamic sequence,
8298 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8300 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8301 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8303 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8304 const Output_section
* os
= relinfo
->layout
->tls_segment()
8306 gold_assert(os
!= NULL
);
8307 gold_assert(os
->needs_symtab_index());
8308 r_sym
= os
->symtab_index();
8309 addend
= dtp_offset
;
8313 r_type
= elfcpp::R_POWERPC_NONE
;
8314 offset
-= 2 * big_endian
;
8318 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8319 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8320 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8321 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8323 // First instruction of initial exec sequence.
8324 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8325 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8327 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8328 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8329 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8332 r_type
= elfcpp::R_POWERPC_NONE
;
8333 offset
-= 2 * big_endian
;
8337 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8338 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8340 // Second instruction of a global dynamic sequence,
8341 // the __tls_get_addr call
8342 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8343 switch (this->optimize_tls_gd(final
))
8345 case tls::TLSOPT_TO_IE
:
8346 r_type
= elfcpp::R_POWERPC_NONE
;
8349 case tls::TLSOPT_TO_LE
:
8350 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8351 offset
+= 2 * big_endian
;
8358 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8359 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8361 // Second instruction of a local dynamic sequence,
8362 // the __tls_get_addr call
8363 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8365 const Output_section
* os
= relinfo
->layout
->tls_segment()
8367 gold_assert(os
!= NULL
);
8368 gold_assert(os
->needs_symtab_index());
8369 r_sym
= os
->symtab_index();
8370 addend
= dtp_offset
;
8371 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8372 offset
+= 2 * big_endian
;
8376 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8378 // Second instruction of an initial exec sequence
8379 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8380 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8382 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8383 offset
+= 2 * big_endian
;
8388 reloc_write
.put_r_offset(offset
);
8389 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
8390 reloc_write
.put_r_addend(addend
);
8392 pwrite
+= reloc_size
;
8395 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
8396 == reloc_view_size
);
8399 // Return the value to use for a dynamic symbol which requires special
8400 // treatment. This is how we support equality comparisons of function
8401 // pointers across shared library boundaries, as described in the
8402 // processor specific ABI supplement.
8404 template<int size
, bool big_endian
>
8406 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8410 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
8411 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8412 p
!= this->stub_tables_
.end();
8415 Address off
= (*p
)->find_plt_call_entry(gsym
);
8416 if (off
!= invalid_address
)
8417 return (*p
)->stub_address() + off
;
8420 else if (this->abiversion() >= 2)
8422 Address off
= this->glink_section()->find_global_entry(gsym
);
8423 if (off
!= invalid_address
)
8424 return this->glink_section()->global_entry_address() + off
;
8429 // Return the PLT address to use for a local symbol.
8430 template<int size
, bool big_endian
>
8432 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8433 const Relobj
* object
,
8434 unsigned int symndx
) const
8438 const Sized_relobj
<size
, big_endian
>* relobj
8439 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8440 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8441 p
!= this->stub_tables_
.end();
8444 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8446 if (off
!= invalid_address
)
8447 return (*p
)->stub_address() + off
;
8453 // Return the PLT address to use for a global symbol.
8454 template<int size
, bool big_endian
>
8456 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8457 const Symbol
* gsym
) const
8461 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8462 p
!= this->stub_tables_
.end();
8465 Address off
= (*p
)->find_plt_call_entry(gsym
);
8466 if (off
!= invalid_address
)
8467 return (*p
)->stub_address() + off
;
8470 else if (this->abiversion() >= 2)
8472 Address off
= this->glink_section()->find_global_entry(gsym
);
8473 if (off
!= invalid_address
)
8474 return this->glink_section()->global_entry_address() + off
;
8479 // Return the offset to use for the GOT_INDX'th got entry which is
8480 // for a local tls symbol specified by OBJECT, SYMNDX.
8481 template<int size
, bool big_endian
>
8483 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8484 const Relobj
* object
,
8485 unsigned int symndx
,
8486 unsigned int got_indx
) const
8488 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8489 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8490 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8492 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8493 got_type
<= GOT_TYPE_TPREL
;
8494 got_type
= Got_type(got_type
+ 1))
8495 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8497 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8498 if (got_type
== GOT_TYPE_TLSGD
)
8500 if (off
== got_indx
* (size
/ 8))
8502 if (got_type
== GOT_TYPE_TPREL
)
8512 // Return the offset to use for the GOT_INDX'th got entry which is
8513 // for global tls symbol GSYM.
8514 template<int size
, bool big_endian
>
8516 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8518 unsigned int got_indx
) const
8520 if (gsym
->type() == elfcpp::STT_TLS
)
8522 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8523 got_type
<= GOT_TYPE_TPREL
;
8524 got_type
= Got_type(got_type
+ 1))
8525 if (gsym
->has_got_offset(got_type
))
8527 unsigned int off
= gsym
->got_offset(got_type
);
8528 if (got_type
== GOT_TYPE_TLSGD
)
8530 if (off
== got_indx
* (size
/ 8))
8532 if (got_type
== GOT_TYPE_TPREL
)
8542 // The selector for powerpc object files.
8544 template<int size
, bool big_endian
>
8545 class Target_selector_powerpc
: public Target_selector
8548 Target_selector_powerpc()
8549 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8552 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8553 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8555 ? (big_endian
? "elf64ppc" : "elf64lppc")
8556 : (big_endian
? "elf32ppc" : "elf32lppc")))
8560 do_instantiate_target()
8561 { return new Target_powerpc
<size
, big_endian
>(); }
8564 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8565 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8566 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8567 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8569 // Instantiate these constants for -O0
8570 template<int size
, bool big_endian
>
8571 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8572 template<int size
, bool big_endian
>
8573 const typename Output_data_glink
<size
, big_endian
>::Address
8574 Output_data_glink
<size
, big_endian
>::invalid_address
;
8575 template<int size
, bool big_endian
>
8576 const typename Stub_table
<size
, big_endian
>::Address
8577 Stub_table
<size
, big_endian
>::invalid_address
;
8578 template<int size
, bool big_endian
>
8579 const typename Target_powerpc
<size
, big_endian
>::Address
8580 Target_powerpc
<size
, big_endian
>::invalid_address
;
8582 } // End anonymous namespace.