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 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1211 symtab
->get_sized_symbol
<size
>(sym
),
1212 object
, shndx
, output_section
,
1213 reloc
, this->rela_dyn_section(layout
));
1216 // Look over all the input sections, deciding where to place stubs.
1218 group_sections(Layout
*, const Task
*, bool);
1220 // Sort output sections by address.
1221 struct Sort_sections
1224 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1225 { return sec1
->address() < sec2
->address(); }
1231 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1232 unsigned int data_shndx
,
1234 unsigned int r_type
,
1237 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1238 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1244 // If this branch needs a plt call stub, or a long branch stub, make one.
1246 make_stub(Stub_table
<size
, big_endian
>*,
1247 Stub_table
<size
, big_endian
>*,
1248 Symbol_table
*) const;
1251 // The branch location..
1252 Powerpc_relobj
<size
, big_endian
>* object_
;
1253 unsigned int shndx_
;
1255 // ..and the branch type and destination.
1256 unsigned int r_type_
;
1257 unsigned int r_sym_
;
1261 // Information about this specific target which we pass to the
1262 // general Target structure.
1263 static Target::Target_info powerpc_info
;
1265 // The types of GOT entries needed for this platform.
1266 // These values are exposed to the ABI in an incremental link.
1267 // Do not renumber existing values without changing the version
1268 // number of the .gnu_incremental_inputs section.
1272 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1273 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1274 GOT_TYPE_TPREL
// entry for @got@tprel
1278 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1279 // The PLT section. This is a container for a table of addresses,
1280 // and their relocations. Each address in the PLT has a dynamic
1281 // relocation (R_*_JMP_SLOT) and each address will have a
1282 // corresponding entry in .glink for lazy resolution of the PLT.
1283 // ppc32 initialises the PLT to point at the .glink entry, while
1284 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1285 // linker adds a stub that loads the PLT entry into ctr then
1286 // branches to ctr. There may be more than one stub for each PLT
1287 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1288 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1289 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1290 // The IPLT section. Like plt_, this is a container for a table of
1291 // addresses and their relocations, specifically for STT_GNU_IFUNC
1292 // functions that resolve locally (STT_GNU_IFUNC functions that
1293 // don't resolve locally go in PLT). Unlike plt_, these have no
1294 // entry in .glink for lazy resolution, and the relocation section
1295 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1296 // the relocation section may contain relocations against
1297 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1298 // relocation section will appear at the end of other dynamic
1299 // relocations, so that ld.so applies these relocations after other
1300 // dynamic relocations. In a static executable, the relocation
1301 // section is emitted and marked with __rela_iplt_start and
1302 // __rela_iplt_end symbols.
1303 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1304 // Section holding long branch destinations.
1305 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1306 // The .glink section.
1307 Output_data_glink
<size
, big_endian
>* glink_
;
1308 // The dynamic reloc section.
1309 Reloc_section
* rela_dyn_
;
1310 // Relocs saved to avoid a COPY reloc.
1311 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1312 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1313 unsigned int tlsld_got_offset_
;
1315 Stub_tables stub_tables_
;
1316 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1317 Branch_lookup_table branch_lookup_table_
;
1319 typedef std::vector
<Branch_info
> Branches
;
1320 Branches branch_info_
;
1322 bool plt_thread_safe_
;
1325 int relax_fail_count_
;
1326 int32_t stub_group_size_
;
1328 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1332 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1335 true, // is_big_endian
1336 elfcpp::EM_PPC
, // machine_code
1337 false, // has_make_symbol
1338 false, // has_resolve
1339 false, // has_code_fill
1340 true, // is_default_stack_executable
1341 false, // can_icf_inline_merge_sections
1343 "/usr/lib/ld.so.1", // dynamic_linker
1344 0x10000000, // default_text_segment_address
1345 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1346 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1347 false, // isolate_execinstr
1349 elfcpp::SHN_UNDEF
, // small_common_shndx
1350 elfcpp::SHN_UNDEF
, // large_common_shndx
1351 0, // small_common_section_flags
1352 0, // large_common_section_flags
1353 NULL
, // attributes_section
1354 NULL
, // attributes_vendor
1355 "_start", // entry_symbol_name
1356 32, // hash_entry_size
1360 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1363 false, // is_big_endian
1364 elfcpp::EM_PPC
, // machine_code
1365 false, // has_make_symbol
1366 false, // has_resolve
1367 false, // has_code_fill
1368 true, // is_default_stack_executable
1369 false, // can_icf_inline_merge_sections
1371 "/usr/lib/ld.so.1", // dynamic_linker
1372 0x10000000, // default_text_segment_address
1373 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1374 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1375 false, // isolate_execinstr
1377 elfcpp::SHN_UNDEF
, // small_common_shndx
1378 elfcpp::SHN_UNDEF
, // large_common_shndx
1379 0, // small_common_section_flags
1380 0, // large_common_section_flags
1381 NULL
, // attributes_section
1382 NULL
, // attributes_vendor
1383 "_start", // entry_symbol_name
1384 32, // hash_entry_size
1388 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1391 true, // is_big_endian
1392 elfcpp::EM_PPC64
, // machine_code
1393 false, // has_make_symbol
1394 false, // has_resolve
1395 false, // has_code_fill
1396 true, // is_default_stack_executable
1397 false, // can_icf_inline_merge_sections
1399 "/usr/lib/ld.so.1", // dynamic_linker
1400 0x10000000, // default_text_segment_address
1401 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1402 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1403 false, // isolate_execinstr
1405 elfcpp::SHN_UNDEF
, // small_common_shndx
1406 elfcpp::SHN_UNDEF
, // large_common_shndx
1407 0, // small_common_section_flags
1408 0, // large_common_section_flags
1409 NULL
, // attributes_section
1410 NULL
, // attributes_vendor
1411 "_start", // entry_symbol_name
1412 32, // hash_entry_size
1416 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1419 false, // is_big_endian
1420 elfcpp::EM_PPC64
, // machine_code
1421 false, // has_make_symbol
1422 false, // has_resolve
1423 false, // has_code_fill
1424 true, // is_default_stack_executable
1425 false, // can_icf_inline_merge_sections
1427 "/usr/lib/ld.so.1", // dynamic_linker
1428 0x10000000, // default_text_segment_address
1429 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1430 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1431 false, // isolate_execinstr
1433 elfcpp::SHN_UNDEF
, // small_common_shndx
1434 elfcpp::SHN_UNDEF
, // large_common_shndx
1435 0, // small_common_section_flags
1436 0, // large_common_section_flags
1437 NULL
, // attributes_section
1438 NULL
, // attributes_vendor
1439 "_start", // entry_symbol_name
1440 32, // hash_entry_size
1444 is_branch_reloc(unsigned int r_type
)
1446 return (r_type
== elfcpp::R_POWERPC_REL24
1447 || r_type
== elfcpp::R_PPC_PLTREL24
1448 || r_type
== elfcpp::R_PPC_LOCAL24PC
1449 || r_type
== elfcpp::R_POWERPC_REL14
1450 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1451 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1452 || r_type
== elfcpp::R_POWERPC_ADDR24
1453 || r_type
== elfcpp::R_POWERPC_ADDR14
1454 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1455 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1458 // If INSN is an opcode that may be used with an @tls operand, return
1459 // the transformed insn for TLS optimisation, otherwise return 0. If
1460 // REG is non-zero only match an insn with RB or RA equal to REG.
1462 at_tls_transform(uint32_t insn
, unsigned int reg
)
1464 if ((insn
& (0x3f << 26)) != 31 << 26)
1468 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1469 rtra
= insn
& ((1 << 26) - (1 << 16));
1470 else if (((insn
>> 16) & 0x1f) == reg
)
1471 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1475 if ((insn
& (0x3ff << 1)) == 266 << 1)
1478 else if ((insn
& (0x1f << 1)) == 23 << 1
1479 && ((insn
& (0x1f << 6)) < 14 << 6
1480 || ((insn
& (0x1f << 6)) >= 16 << 6
1481 && (insn
& (0x1f << 6)) < 24 << 6)))
1482 // load and store indexed -> dform
1483 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1484 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1485 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1486 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1487 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1489 insn
= (58 << 26) | 2;
1497 template<int size
, bool big_endian
>
1498 class Powerpc_relocate_functions
1518 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1519 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1521 template<int valsize
>
1523 has_overflow_signed(Address value
)
1525 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1526 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1527 limit
<<= ((valsize
- 1) >> 1);
1528 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1529 return value
+ limit
> (limit
<< 1) - 1;
1532 template<int valsize
>
1534 has_overflow_unsigned(Address value
)
1536 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1537 limit
<<= ((valsize
- 1) >> 1);
1538 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1539 return value
> (limit
<< 1) - 1;
1542 template<int valsize
>
1544 has_overflow_bitfield(Address value
)
1546 return (has_overflow_unsigned
<valsize
>(value
)
1547 && has_overflow_signed
<valsize
>(value
));
1550 template<int valsize
>
1551 static inline Status
1552 overflowed(Address value
, Overflow_check overflow
)
1554 if (overflow
== CHECK_SIGNED
)
1556 if (has_overflow_signed
<valsize
>(value
))
1557 return STATUS_OVERFLOW
;
1559 else if (overflow
== CHECK_UNSIGNED
)
1561 if (has_overflow_unsigned
<valsize
>(value
))
1562 return STATUS_OVERFLOW
;
1564 else if (overflow
== CHECK_BITFIELD
)
1566 if (has_overflow_bitfield
<valsize
>(value
))
1567 return STATUS_OVERFLOW
;
1572 // Do a simple RELA relocation
1573 template<int fieldsize
, int valsize
>
1574 static inline Status
1575 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1577 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1578 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1579 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1580 return overflowed
<valsize
>(value
, overflow
);
1583 template<int fieldsize
, int valsize
>
1584 static inline Status
1585 rela(unsigned char* view
,
1586 unsigned int right_shift
,
1587 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1589 Overflow_check overflow
)
1591 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1592 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1593 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1594 Valtype reloc
= value
>> right_shift
;
1597 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1598 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1601 // Do a simple RELA relocation, unaligned.
1602 template<int fieldsize
, int valsize
>
1603 static inline Status
1604 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1606 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1607 return overflowed
<valsize
>(value
, overflow
);
1610 template<int fieldsize
, int valsize
>
1611 static inline Status
1612 rela_ua(unsigned char* view
,
1613 unsigned int right_shift
,
1614 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1616 Overflow_check overflow
)
1618 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1620 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1621 Valtype reloc
= value
>> right_shift
;
1624 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1625 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1629 // R_PPC64_ADDR64: (Symbol + Addend)
1631 addr64(unsigned char* view
, Address value
)
1632 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1634 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1636 addr64_u(unsigned char* view
, Address value
)
1637 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1639 // R_POWERPC_ADDR32: (Symbol + Addend)
1640 static inline Status
1641 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1642 { return This::template rela
<32,32>(view
, value
, overflow
); }
1644 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1645 static inline Status
1646 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1647 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1649 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1650 static inline Status
1651 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1653 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1655 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1656 stat
= STATUS_OVERFLOW
;
1660 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1661 static inline Status
1662 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1663 { return This::template rela
<16,16>(view
, value
, overflow
); }
1665 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1666 static inline Status
1667 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1668 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1670 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1671 static inline Status
1672 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1674 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1675 if ((value
& 3) != 0)
1676 stat
= STATUS_OVERFLOW
;
1680 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1682 addr16_hi(unsigned char* view
, Address value
)
1683 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1685 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1687 addr16_ha(unsigned char* view
, Address value
)
1688 { This::addr16_hi(view
, value
+ 0x8000); }
1690 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1692 addr16_hi2(unsigned char* view
, Address value
)
1693 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1695 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1697 addr16_ha2(unsigned char* view
, Address value
)
1698 { This::addr16_hi2(view
, value
+ 0x8000); }
1700 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1702 addr16_hi3(unsigned char* view
, Address value
)
1703 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1705 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1707 addr16_ha3(unsigned char* view
, Address value
)
1708 { This::addr16_hi3(view
, value
+ 0x8000); }
1710 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1711 static inline Status
1712 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1714 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1715 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1716 stat
= STATUS_OVERFLOW
;
1721 // Set ABI version for input and output.
1723 template<int size
, bool big_endian
>
1725 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1727 this->e_flags_
|= ver
;
1728 if (this->abiversion() != 0)
1730 Target_powerpc
<size
, big_endian
>* target
=
1731 static_cast<Target_powerpc
<size
, big_endian
>*>(
1732 parameters
->sized_target
<size
, big_endian
>());
1733 if (target
->abiversion() == 0)
1734 target
->set_abiversion(this->abiversion());
1735 else if (target
->abiversion() != this->abiversion())
1736 gold_error(_("%s: ABI version %d is not compatible "
1737 "with ABI version %d output"),
1738 this->name().c_str(),
1739 this->abiversion(), target
->abiversion());
1744 // Stash away the index of .got2 or .opd in a relocatable object, if
1745 // such a section exists.
1747 template<int size
, bool big_endian
>
1749 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1750 Read_symbols_data
* sd
)
1752 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1753 const unsigned char* namesu
= sd
->section_names
->data();
1754 const char* names
= reinterpret_cast<const char*>(namesu
);
1755 section_size_type names_size
= sd
->section_names_size
;
1756 const unsigned char* s
;
1758 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1759 size
== 32 ? ".got2" : ".opd",
1760 names
, names_size
, NULL
);
1763 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1764 this->special_
= ndx
;
1767 if (this->abiversion() == 0)
1768 this->set_abiversion(1);
1769 else if (this->abiversion() > 1)
1770 gold_error(_("%s: .opd invalid in abiv%d"),
1771 this->name().c_str(), this->abiversion());
1774 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1777 // Examine .rela.opd to build info about function entry points.
1779 template<int size
, bool big_endian
>
1781 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1783 const unsigned char* prelocs
,
1784 const unsigned char* plocal_syms
)
1788 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1790 const int reloc_size
1791 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1792 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1793 Address expected_off
= 0;
1794 bool regular
= true;
1795 unsigned int opd_ent_size
= 0;
1797 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1799 Reltype
reloc(prelocs
);
1800 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1801 = reloc
.get_r_info();
1802 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1803 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1805 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1806 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1809 if (r_sym
< this->local_symbol_count())
1811 typename
elfcpp::Sym
<size
, big_endian
>
1812 lsym(plocal_syms
+ r_sym
* sym_size
);
1813 shndx
= lsym
.get_st_shndx();
1814 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1815 value
= lsym
.get_st_value();
1818 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1820 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1821 value
+ reloc
.get_r_addend());
1824 expected_off
= reloc
.get_r_offset();
1825 opd_ent_size
= expected_off
;
1827 else if (expected_off
!= reloc
.get_r_offset())
1829 expected_off
+= opd_ent_size
;
1831 else if (r_type
== elfcpp::R_PPC64_TOC
)
1833 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1838 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1839 this->name().c_str(), r_type
);
1843 if (reloc_count
<= 2)
1844 opd_ent_size
= this->section_size(this->opd_shndx());
1845 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1849 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1850 this->name().c_str());
1856 template<int size
, bool big_endian
>
1858 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1860 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1863 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1864 p
!= rd
->relocs
.end();
1867 if (p
->data_shndx
== this->opd_shndx())
1869 uint64_t opd_size
= this->section_size(this->opd_shndx());
1870 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1873 this->init_opd(opd_size
);
1874 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1875 rd
->local_symbols
->data());
1883 // Read the symbols then set up st_other vector.
1885 template<int size
, bool big_endian
>
1887 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1889 this->base_read_symbols(sd
);
1892 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1893 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1894 const unsigned int loccount
= this->do_local_symbol_count();
1897 this->st_other_
.resize(loccount
);
1898 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1899 off_t locsize
= loccount
* sym_size
;
1900 const unsigned int symtab_shndx
= this->symtab_shndx();
1901 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1902 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1903 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1904 locsize
, true, false);
1906 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1908 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1909 unsigned char st_other
= sym
.get_st_other();
1910 this->st_other_
[i
] = st_other
;
1911 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1913 if (this->abiversion() == 0)
1914 this->set_abiversion(2);
1915 else if (this->abiversion() < 2)
1916 gold_error(_("%s: local symbol %d has invalid st_other"
1917 " for ABI version 1"),
1918 this->name().c_str(), i
);
1925 template<int size
, bool big_endian
>
1927 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1929 this->e_flags_
|= ver
;
1930 if (this->abiversion() != 0)
1932 Target_powerpc
<size
, big_endian
>* target
=
1933 static_cast<Target_powerpc
<size
, big_endian
>*>(
1934 parameters
->sized_target
<size
, big_endian
>());
1935 if (target
->abiversion() == 0)
1936 target
->set_abiversion(this->abiversion());
1937 else if (target
->abiversion() != this->abiversion())
1938 gold_error(_("%s: ABI version %d is not compatible "
1939 "with ABI version %d output"),
1940 this->name().c_str(),
1941 this->abiversion(), target
->abiversion());
1946 // Call Sized_dynobj::base_read_symbols to read the symbols then
1947 // read .opd from a dynamic object, filling in opd_ent_ vector,
1949 template<int size
, bool big_endian
>
1951 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1953 this->base_read_symbols(sd
);
1956 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1957 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1958 const unsigned char* namesu
= sd
->section_names
->data();
1959 const char* names
= reinterpret_cast<const char*>(namesu
);
1960 const unsigned char* s
= NULL
;
1961 const unsigned char* opd
;
1962 section_size_type opd_size
;
1964 // Find and read .opd section.
1967 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1968 sd
->section_names_size
,
1973 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1974 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1975 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1977 if (this->abiversion() == 0)
1978 this->set_abiversion(1);
1979 else if (this->abiversion() > 1)
1980 gold_error(_("%s: .opd invalid in abiv%d"),
1981 this->name().c_str(), this->abiversion());
1983 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1984 this->opd_address_
= shdr
.get_sh_addr();
1985 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1986 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1992 // Build set of executable sections.
1993 // Using a set is probably overkill. There is likely to be only
1994 // a few executable sections, typically .init, .text and .fini,
1995 // and they are generally grouped together.
1996 typedef std::set
<Sec_info
> Exec_sections
;
1997 Exec_sections exec_sections
;
1999 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2001 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2002 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2003 && ((shdr
.get_sh_flags()
2004 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2005 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2006 && shdr
.get_sh_size() != 0)
2008 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2009 shdr
.get_sh_size(), i
));
2012 if (exec_sections
.empty())
2015 // Look over the OPD entries. This is complicated by the fact
2016 // that some binaries will use two-word entries while others
2017 // will use the standard three-word entries. In most cases
2018 // the third word (the environment pointer for languages like
2019 // Pascal) is unused and will be zero. If the third word is
2020 // used it should not be pointing into executable sections,
2022 this->init_opd(opd_size
);
2023 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2025 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2026 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2027 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2029 // Chances are that this is the third word of an OPD entry.
2031 typename
Exec_sections::const_iterator e
2032 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2033 if (e
!= exec_sections
.begin())
2036 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2038 // We have an address in an executable section.
2039 // VAL ought to be the function entry, set it up.
2040 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2041 // Skip second word of OPD entry, the TOC pointer.
2045 // If we didn't match any executable sections, we likely
2046 // have a non-zero third word in the OPD entry.
2051 // Set up some symbols.
2053 template<int size
, bool big_endian
>
2055 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2056 Symbol_table
* symtab
,
2061 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2062 // undefined when scanning relocs (and thus requires
2063 // non-relative dynamic relocs). The proper value will be
2065 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2066 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2068 Target_powerpc
<size
, big_endian
>* target
=
2069 static_cast<Target_powerpc
<size
, big_endian
>*>(
2070 parameters
->sized_target
<size
, big_endian
>());
2071 Output_data_got_powerpc
<size
, big_endian
>* got
2072 = target
->got_section(symtab
, layout
);
2073 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2074 Symbol_table::PREDEFINED
,
2078 elfcpp::STV_HIDDEN
, 0,
2082 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2083 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2084 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2086 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2088 = layout
->add_output_section_data(".sdata", 0,
2090 | elfcpp::SHF_WRITE
,
2091 sdata
, ORDER_SMALL_DATA
, false);
2092 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2093 Symbol_table::PREDEFINED
,
2094 os
, 32768, 0, elfcpp::STT_OBJECT
,
2095 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2101 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2102 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2103 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2105 Target_powerpc
<size
, big_endian
>* target
=
2106 static_cast<Target_powerpc
<size
, big_endian
>*>(
2107 parameters
->sized_target
<size
, big_endian
>());
2108 Output_data_got_powerpc
<size
, big_endian
>* got
2109 = target
->got_section(symtab
, layout
);
2110 symtab
->define_in_output_data(".TOC.", NULL
,
2111 Symbol_table::PREDEFINED
,
2115 elfcpp::STV_HIDDEN
, 0,
2121 // Set up PowerPC target specific relobj.
2123 template<int size
, bool big_endian
>
2125 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2126 const std::string
& name
,
2127 Input_file
* input_file
,
2128 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2130 int et
= ehdr
.get_e_type();
2131 // ET_EXEC files are valid input for --just-symbols/-R,
2132 // and we treat them as relocatable objects.
2133 if (et
== elfcpp::ET_REL
2134 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2136 Powerpc_relobj
<size
, big_endian
>* obj
=
2137 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2141 else if (et
== elfcpp::ET_DYN
)
2143 Powerpc_dynobj
<size
, big_endian
>* obj
=
2144 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2150 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2155 template<int size
, bool big_endian
>
2156 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2159 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2160 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2162 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2163 : Output_data_got
<size
, big_endian
>(),
2164 symtab_(symtab
), layout_(layout
),
2165 header_ent_cnt_(size
== 32 ? 3 : 1),
2166 header_index_(size
== 32 ? 0x2000 : 0)
2169 // Override all the Output_data_got methods we use so as to first call
2172 add_global(Symbol
* gsym
, unsigned int got_type
)
2174 this->reserve_ent();
2175 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2179 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2181 this->reserve_ent();
2182 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2186 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2187 { return this->add_global_plt(gsym
, got_type
); }
2190 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2191 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2193 this->reserve_ent();
2194 Output_data_got
<size
, big_endian
>::
2195 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2199 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2200 Output_data_reloc_generic
* rel_dyn
,
2201 unsigned int r_type_1
, unsigned int r_type_2
)
2203 this->reserve_ent(2);
2204 Output_data_got
<size
, big_endian
>::
2205 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2209 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2211 this->reserve_ent();
2212 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2217 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2219 this->reserve_ent();
2220 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2225 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2226 { return this->add_local_plt(object
, sym_index
, got_type
); }
2229 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2230 unsigned int got_type
,
2231 Output_data_reloc_generic
* rel_dyn
,
2232 unsigned int r_type
)
2234 this->reserve_ent(2);
2235 Output_data_got
<size
, big_endian
>::
2236 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2240 add_constant(Valtype constant
)
2242 this->reserve_ent();
2243 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2247 add_constant_pair(Valtype c1
, Valtype c2
)
2249 this->reserve_ent(2);
2250 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2253 // Offset of _GLOBAL_OFFSET_TABLE_.
2257 return this->got_offset(this->header_index_
);
2260 // Offset of base used to access the GOT/TOC.
2261 // The got/toc pointer reg will be set to this value.
2263 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2266 return this->g_o_t();
2268 return (this->output_section()->address()
2269 + object
->toc_base_offset()
2273 // Ensure our GOT has a header.
2275 set_final_data_size()
2277 if (this->header_ent_cnt_
!= 0)
2278 this->make_header();
2279 Output_data_got
<size
, big_endian
>::set_final_data_size();
2282 // First word of GOT header needs some values that are not
2283 // handled by Output_data_got so poke them in here.
2284 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2286 do_write(Output_file
* of
)
2289 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2290 val
= this->layout_
->dynamic_section()->address();
2292 val
= this->output_section()->address() + 0x8000;
2293 this->replace_constant(this->header_index_
, val
);
2294 Output_data_got
<size
, big_endian
>::do_write(of
);
2299 reserve_ent(unsigned int cnt
= 1)
2301 if (this->header_ent_cnt_
== 0)
2303 if (this->num_entries() + cnt
> this->header_index_
)
2304 this->make_header();
2310 this->header_ent_cnt_
= 0;
2311 this->header_index_
= this->num_entries();
2314 Output_data_got
<size
, big_endian
>::add_constant(0);
2315 Output_data_got
<size
, big_endian
>::add_constant(0);
2316 Output_data_got
<size
, big_endian
>::add_constant(0);
2318 // Define _GLOBAL_OFFSET_TABLE_ at the header
2319 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2322 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2323 sym
->set_value(this->g_o_t());
2326 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2327 Symbol_table::PREDEFINED
,
2328 this, this->g_o_t(), 0,
2331 elfcpp::STV_HIDDEN
, 0,
2335 Output_data_got
<size
, big_endian
>::add_constant(0);
2338 // Stashed pointers.
2339 Symbol_table
* symtab_
;
2343 unsigned int header_ent_cnt_
;
2344 // GOT header index.
2345 unsigned int header_index_
;
2348 // Get the GOT section, creating it if necessary.
2350 template<int size
, bool big_endian
>
2351 Output_data_got_powerpc
<size
, big_endian
>*
2352 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2355 if (this->got_
== NULL
)
2357 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2360 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2362 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2363 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2364 this->got_
, ORDER_DATA
, false);
2370 // Get the dynamic reloc section, creating it if necessary.
2372 template<int size
, bool big_endian
>
2373 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2374 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2376 if (this->rela_dyn_
== NULL
)
2378 gold_assert(layout
!= NULL
);
2379 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2380 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2381 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2382 ORDER_DYNAMIC_RELOCS
, false);
2384 return this->rela_dyn_
;
2387 // Similarly, but for ifunc symbols get the one for ifunc.
2389 template<int size
, bool big_endian
>
2390 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2391 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2396 return this->rela_dyn_section(layout
);
2398 if (this->iplt_
== NULL
)
2399 this->make_iplt_section(symtab
, layout
);
2400 return this->iplt_
->rel_plt();
2406 // Determine the stub group size. The group size is the absolute
2407 // value of the parameter --stub-group-size. If --stub-group-size
2408 // is passed a negative value, we restrict stubs to be always before
2409 // the stubbed branches.
2410 Stub_control(int32_t size
, bool no_size_errors
)
2411 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2412 stub14_group_size_(abs(size
) >> 10),
2413 stubs_always_before_branch_(size
< 0),
2414 suppress_size_errors_(no_size_errors
),
2415 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2419 // Return true iff input section can be handled by current stub
2422 can_add_to_stub_group(Output_section
* o
,
2423 const Output_section::Input_section
* i
,
2426 const Output_section::Input_section
*
2432 { return output_section_
; }
2435 set_output_and_owner(Output_section
* o
,
2436 const Output_section::Input_section
* i
)
2438 this->output_section_
= o
;
2446 FINDING_STUB_SECTION
,
2451 uint32_t stub_group_size_
;
2452 uint32_t stub14_group_size_
;
2453 bool stubs_always_before_branch_
;
2454 bool suppress_size_errors_
;
2455 uint64_t group_end_addr_
;
2456 const Output_section::Input_section
* owner_
;
2457 Output_section
* output_section_
;
2460 // Return true iff input section can be handled by current stub
2464 Stub_control::can_add_to_stub_group(Output_section
* o
,
2465 const Output_section::Input_section
* i
,
2469 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2470 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2472 uint64_t start_addr
= o
->address();
2475 // .init and .fini sections are pasted together to form a single
2476 // function. We can't be adding stubs in the middle of the function.
2477 this_size
= o
->data_size();
2480 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2481 this_size
= i
->data_size();
2483 uint64_t end_addr
= start_addr
+ this_size
;
2484 bool toobig
= this_size
> group_size
;
2486 if (toobig
&& !this->suppress_size_errors_
)
2487 gold_warning(_("%s:%s exceeds group size"),
2488 i
->relobj()->name().c_str(),
2489 i
->relobj()->section_name(i
->shndx()).c_str());
2491 if (this->state_
!= HAS_STUB_SECTION
2492 && (!whole_sec
|| this->output_section_
!= o
)
2493 && (this->state_
== NO_GROUP
2494 || this->group_end_addr_
- end_addr
< group_size
))
2497 this->output_section_
= o
;
2500 if (this->state_
== NO_GROUP
)
2502 this->state_
= FINDING_STUB_SECTION
;
2503 this->group_end_addr_
= end_addr
;
2505 else if (this->group_end_addr_
- start_addr
< group_size
)
2507 // Adding this section would make the group larger than GROUP_SIZE.
2508 else if (this->state_
== FINDING_STUB_SECTION
2509 && !this->stubs_always_before_branch_
2512 // But wait, there's more! Input sections up to GROUP_SIZE
2513 // bytes before the stub table can be handled by it too.
2514 this->state_
= HAS_STUB_SECTION
;
2515 this->group_end_addr_
= end_addr
;
2519 this->state_
= NO_GROUP
;
2525 // Look over all the input sections, deciding where to place stubs.
2527 template<int size
, bool big_endian
>
2529 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2531 bool no_size_errors
)
2533 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
);
2535 // Group input sections and insert stub table
2536 Stub_table_owner
* table_owner
= NULL
;
2537 std::vector
<Stub_table_owner
*> tables
;
2538 Layout::Section_list section_list
;
2539 layout
->get_executable_sections(§ion_list
);
2540 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2541 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2542 o
!= section_list
.rend();
2545 typedef Output_section::Input_section_list Input_section_list
;
2546 for (Input_section_list::const_reverse_iterator i
2547 = (*o
)->input_sections().rbegin();
2548 i
!= (*o
)->input_sections().rend();
2551 if (i
->is_input_section()
2552 || i
->is_relaxed_input_section())
2554 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2555 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2556 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2557 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2559 table_owner
->output_section
= stub_control
.output_section();
2560 table_owner
->owner
= stub_control
.owner();
2561 stub_control
.set_output_and_owner(*o
, &*i
);
2564 if (table_owner
== NULL
)
2566 table_owner
= new Stub_table_owner
;
2567 tables
.push_back(table_owner
);
2569 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2573 if (table_owner
!= NULL
)
2575 const Output_section::Input_section
* i
= stub_control
.owner();
2577 if (tables
.size() >= 2 && tables
[tables
.size() - 2]->owner
== i
)
2579 // Corner case. A new stub group was made for the first
2580 // section (last one looked at here) for some reason, but
2581 // the first section is already being used as the owner for
2582 // a stub table for following sections. Force it into that
2586 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2587 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2588 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2592 table_owner
->output_section
= stub_control
.output_section();
2593 table_owner
->owner
= i
;
2596 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2600 Stub_table
<size
, big_endian
>* stub_table
;
2602 if ((*t
)->owner
->is_input_section())
2603 stub_table
= new Stub_table
<size
, big_endian
>(this,
2604 (*t
)->output_section
,
2606 else if ((*t
)->owner
->is_relaxed_input_section())
2607 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2608 (*t
)->owner
->relaxed_input_section());
2611 this->stub_tables_
.push_back(stub_table
);
2616 static unsigned long
2617 max_branch_delta (unsigned int r_type
)
2619 if (r_type
== elfcpp::R_POWERPC_REL14
2620 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2621 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2623 if (r_type
== elfcpp::R_POWERPC_REL24
2624 || r_type
== elfcpp::R_PPC_PLTREL24
2625 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2630 // If this branch needs a plt call stub, or a long branch stub, make one.
2632 template<int size
, bool big_endian
>
2634 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2635 Stub_table
<size
, big_endian
>* stub_table
,
2636 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2637 Symbol_table
* symtab
) const
2639 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2640 if (sym
!= NULL
&& sym
->is_forwarder())
2641 sym
= symtab
->resolve_forwards(sym
);
2642 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2643 Target_powerpc
<size
, big_endian
>* target
=
2644 static_cast<Target_powerpc
<size
, big_endian
>*>(
2645 parameters
->sized_target
<size
, big_endian
>());
2647 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2648 : this->object_
->local_has_plt_offset(this->r_sym_
))
2652 && target
->abiversion() >= 2
2653 && !parameters
->options().output_is_position_independent()
2654 && !is_branch_reloc(this->r_type_
))
2655 target
->glink_section()->add_global_entry(gsym
);
2658 if (stub_table
== NULL
)
2659 stub_table
= this->object_
->stub_table(this->shndx_
);
2660 if (stub_table
== NULL
)
2662 // This is a ref from a data section to an ifunc symbol.
2663 stub_table
= ifunc_stub_table
;
2665 gold_assert(stub_table
!= NULL
);
2666 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2667 if (from
!= invalid_address
)
2668 from
+= (this->object_
->output_section(this->shndx_
)->address()
2671 return stub_table
->add_plt_call_entry(from
,
2672 this->object_
, gsym
,
2673 this->r_type_
, this->addend_
);
2675 return stub_table
->add_plt_call_entry(from
,
2676 this->object_
, this->r_sym_
,
2677 this->r_type_
, this->addend_
);
2682 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2683 if (max_branch_offset
== 0)
2685 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2686 gold_assert(from
!= invalid_address
);
2687 from
+= (this->object_
->output_section(this->shndx_
)->address()
2692 switch (gsym
->source())
2694 case Symbol::FROM_OBJECT
:
2696 Object
* symobj
= gsym
->object();
2697 if (symobj
->is_dynamic()
2698 || symobj
->pluginobj() != NULL
)
2701 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2702 if (shndx
== elfcpp::SHN_UNDEF
)
2707 case Symbol::IS_UNDEFINED
:
2713 Symbol_table::Compute_final_value_status status
;
2714 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2715 if (status
!= Symbol_table::CFVS_OK
)
2718 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2722 const Symbol_value
<size
>* psymval
2723 = this->object_
->local_symbol(this->r_sym_
);
2724 Symbol_value
<size
> symval
;
2725 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2726 typename
ObjType::Compute_final_local_value_status status
2727 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2729 if (status
!= ObjType::CFLV_OK
2730 || !symval
.has_output_value())
2732 to
= symval
.value(this->object_
, 0);
2734 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2736 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2737 to
+= this->addend_
;
2738 if (stub_table
== NULL
)
2739 stub_table
= this->object_
->stub_table(this->shndx_
);
2740 if (size
== 64 && target
->abiversion() < 2)
2742 unsigned int dest_shndx
;
2743 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2747 Address delta
= to
- from
;
2748 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2750 if (stub_table
== NULL
)
2752 gold_warning(_("%s:%s: branch in non-executable section,"
2753 " no long branch stub for you"),
2754 this->object_
->name().c_str(),
2755 this->object_
->section_name(this->shndx_
).c_str());
2758 bool save_res
= (size
== 64
2760 && gsym
->source() == Symbol::IN_OUTPUT_DATA
2761 && gsym
->output_data() == target
->savres_section());
2762 return stub_table
->add_long_branch_entry(this->object_
,
2764 from
, to
, save_res
);
2770 // Relaxation hook. This is where we do stub generation.
2772 template<int size
, bool big_endian
>
2774 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2775 const Input_objects
*,
2776 Symbol_table
* symtab
,
2780 unsigned int prev_brlt_size
= 0;
2784 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
2786 && this->abiversion() < 2
2788 && !parameters
->options().user_set_plt_thread_safe())
2790 static const char* const thread_starter
[] =
2794 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2796 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2797 "mq_notify", "create_timer",
2802 "GOMP_parallel_start",
2803 "GOMP_parallel_loop_static",
2804 "GOMP_parallel_loop_static_start",
2805 "GOMP_parallel_loop_dynamic",
2806 "GOMP_parallel_loop_dynamic_start",
2807 "GOMP_parallel_loop_guided",
2808 "GOMP_parallel_loop_guided_start",
2809 "GOMP_parallel_loop_runtime",
2810 "GOMP_parallel_loop_runtime_start",
2811 "GOMP_parallel_sections",
2812 "GOMP_parallel_sections_start",
2817 if (parameters
->options().shared())
2821 for (unsigned int i
= 0;
2822 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2825 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2826 thread_safe
= (sym
!= NULL
2828 && sym
->in_real_elf());
2834 this->plt_thread_safe_
= thread_safe
;
2839 this->stub_group_size_
= parameters
->options().stub_group_size();
2840 bool no_size_errors
= true;
2841 if (this->stub_group_size_
== 1)
2842 this->stub_group_size_
= 0x1c00000;
2843 else if (this->stub_group_size_
== -1)
2844 this->stub_group_size_
= -0x1e00000;
2846 no_size_errors
= false;
2847 this->group_sections(layout
, task
, no_size_errors
);
2849 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
2851 this->branch_lookup_table_
.clear();
2852 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2853 p
!= this->stub_tables_
.end();
2856 (*p
)->clear_stubs(true);
2858 this->stub_tables_
.clear();
2859 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
2860 gold_info(_("%s: stub group size is too large; retrying with %d"),
2861 program_name
, this->stub_group_size_
);
2862 this->group_sections(layout
, task
, true);
2865 // We need address of stub tables valid for make_stub.
2866 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2867 p
!= this->stub_tables_
.end();
2870 const Powerpc_relobj
<size
, big_endian
>* object
2871 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2872 Address off
= object
->get_output_section_offset((*p
)->shndx());
2873 gold_assert(off
!= invalid_address
);
2874 Output_section
* os
= (*p
)->output_section();
2875 (*p
)->set_address_and_size(os
, off
);
2880 // Clear plt call stubs, long branch stubs and branch lookup table.
2881 prev_brlt_size
= this->branch_lookup_table_
.size();
2882 this->branch_lookup_table_
.clear();
2883 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2884 p
!= this->stub_tables_
.end();
2887 (*p
)->clear_stubs(false);
2891 // Build all the stubs.
2892 this->relax_failed_
= false;
2893 Stub_table
<size
, big_endian
>* ifunc_stub_table
2894 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2895 Stub_table
<size
, big_endian
>* one_stub_table
2896 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2897 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2898 b
!= this->branch_info_
.end();
2901 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
2902 && !this->relax_failed_
)
2904 this->relax_failed_
= true;
2905 this->relax_fail_count_
++;
2906 if (this->relax_fail_count_
< 3)
2911 // Did anything change size?
2912 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2913 bool again
= num_huge_branches
!= prev_brlt_size
;
2914 if (size
== 64 && num_huge_branches
!= 0)
2915 this->make_brlt_section(layout
);
2916 if (size
== 64 && again
)
2917 this->brlt_section_
->set_current_size(num_huge_branches
);
2919 typedef Unordered_set
<Output_section
*> Output_sections
;
2920 Output_sections os_need_update
;
2921 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2922 p
!= this->stub_tables_
.end();
2925 if ((*p
)->size_update())
2928 (*p
)->add_eh_frame(layout
);
2929 os_need_update
.insert((*p
)->output_section());
2933 // Set output section offsets for all input sections in an output
2934 // section that just changed size. Anything past the stubs will
2936 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2937 p
!= os_need_update
.end();
2940 Output_section
* os
= *p
;
2942 typedef Output_section::Input_section_list Input_section_list
;
2943 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2944 i
!= os
->input_sections().end();
2947 off
= align_address(off
, i
->addralign());
2948 if (i
->is_input_section() || i
->is_relaxed_input_section())
2949 i
->relobj()->set_section_offset(i
->shndx(), off
);
2950 if (i
->is_relaxed_input_section())
2952 Stub_table
<size
, big_endian
>* stub_table
2953 = static_cast<Stub_table
<size
, big_endian
>*>(
2954 i
->relaxed_input_section());
2955 off
+= stub_table
->set_address_and_size(os
, off
);
2958 off
+= i
->data_size();
2960 // If .branch_lt is part of this output section, then we have
2961 // just done the offset adjustment.
2962 os
->clear_section_offsets_need_adjustment();
2967 && num_huge_branches
!= 0
2968 && parameters
->options().output_is_position_independent())
2970 // Fill in the BRLT relocs.
2971 this->brlt_section_
->reset_brlt_sizes();
2972 for (typename
Branch_lookup_table::const_iterator p
2973 = this->branch_lookup_table_
.begin();
2974 p
!= this->branch_lookup_table_
.end();
2977 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2979 this->brlt_section_
->finalize_brlt_sizes();
2984 template<int size
, bool big_endian
>
2986 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2987 unsigned char* oview
,
2991 uint64_t address
= plt
->address();
2992 off_t len
= plt
->data_size();
2994 if (plt
== this->glink_
)
2996 // See Output_data_glink::do_write() for glink contents.
2999 gold_assert(parameters
->doing_static_link());
3000 // Static linking may need stubs, to support ifunc and long
3001 // branches. We need to create an output section for
3002 // .eh_frame early in the link process, to have a place to
3003 // attach stub .eh_frame info. We also need to have
3004 // registered a CIE that matches the stub CIE. Both of
3005 // these requirements are satisfied by creating an FDE and
3006 // CIE for .glink, even though static linking will leave
3007 // .glink zero length.
3008 // ??? Hopefully generating an FDE with a zero address range
3009 // won't confuse anything that consumes .eh_frame info.
3011 else if (size
== 64)
3013 // There is one word before __glink_PLTresolve
3017 else if (parameters
->options().output_is_position_independent())
3019 // There are two FDEs for a position independent glink.
3020 // The first covers the branch table, the second
3021 // __glink_PLTresolve at the end of glink.
3022 off_t resolve_size
= this->glink_
->pltresolve_size
;
3023 if (oview
[9] == elfcpp::DW_CFA_nop
)
3024 len
-= resolve_size
;
3027 address
+= len
- resolve_size
;
3034 // Must be a stub table.
3035 const Stub_table
<size
, big_endian
>* stub_table
3036 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3037 uint64_t stub_address
= stub_table
->stub_address();
3038 len
-= stub_address
- address
;
3039 address
= stub_address
;
3042 *paddress
= address
;
3046 // A class to handle the PLT data.
3048 template<int size
, bool big_endian
>
3049 class Output_data_plt_powerpc
: public Output_section_data_build
3052 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3053 size
, big_endian
> Reloc_section
;
3055 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3056 Reloc_section
* plt_rel
,
3058 : Output_section_data_build(size
== 32 ? 4 : 8),
3064 // Add an entry to the PLT.
3069 add_ifunc_entry(Symbol
*);
3072 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3074 // Return the .rela.plt section data.
3081 // Return the number of PLT entries.
3085 if (this->current_data_size() == 0)
3087 return ((this->current_data_size() - this->first_plt_entry_offset())
3088 / this->plt_entry_size());
3093 do_adjust_output_section(Output_section
* os
)
3098 // Write to a map file.
3100 do_print_to_mapfile(Mapfile
* mapfile
) const
3101 { mapfile
->print_output_data(this, this->name_
); }
3104 // Return the offset of the first non-reserved PLT entry.
3106 first_plt_entry_offset() const
3108 // IPLT has no reserved entry.
3109 if (this->name_
[3] == 'I')
3111 return this->targ_
->first_plt_entry_offset();
3114 // Return the size of each PLT entry.
3116 plt_entry_size() const
3118 return this->targ_
->plt_entry_size();
3121 // Write out the PLT data.
3123 do_write(Output_file
*);
3125 // The reloc section.
3126 Reloc_section
* rel_
;
3127 // Allows access to .glink for do_write.
3128 Target_powerpc
<size
, big_endian
>* targ_
;
3129 // What to report in map file.
3133 // Add an entry to the PLT.
3135 template<int size
, bool big_endian
>
3137 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3139 if (!gsym
->has_plt_offset())
3141 section_size_type off
= this->current_data_size();
3143 off
+= this->first_plt_entry_offset();
3144 gsym
->set_plt_offset(off
);
3145 gsym
->set_needs_dynsym_entry();
3146 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3147 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3148 off
+= this->plt_entry_size();
3149 this->set_current_data_size(off
);
3153 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3155 template<int size
, bool big_endian
>
3157 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3159 if (!gsym
->has_plt_offset())
3161 section_size_type off
= this->current_data_size();
3162 gsym
->set_plt_offset(off
);
3163 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3164 if (size
== 64 && this->targ_
->abiversion() < 2)
3165 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3166 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3167 off
+= this->plt_entry_size();
3168 this->set_current_data_size(off
);
3172 // Add an entry for a local ifunc symbol to the IPLT.
3174 template<int size
, bool big_endian
>
3176 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3177 Sized_relobj_file
<size
, big_endian
>* relobj
,
3178 unsigned int local_sym_index
)
3180 if (!relobj
->local_has_plt_offset(local_sym_index
))
3182 section_size_type off
= this->current_data_size();
3183 relobj
->set_local_plt_offset(local_sym_index
, off
);
3184 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3185 if (size
== 64 && this->targ_
->abiversion() < 2)
3186 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3187 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3189 off
+= this->plt_entry_size();
3190 this->set_current_data_size(off
);
3194 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3195 static const uint32_t add_2_2_11
= 0x7c425a14;
3196 static const uint32_t add_3_3_2
= 0x7c631214;
3197 static const uint32_t add_3_3_13
= 0x7c636a14;
3198 static const uint32_t add_11_0_11
= 0x7d605a14;
3199 static const uint32_t add_11_2_11
= 0x7d625a14;
3200 static const uint32_t add_11_11_2
= 0x7d6b1214;
3201 static const uint32_t addi_0_12
= 0x380c0000;
3202 static const uint32_t addi_2_2
= 0x38420000;
3203 static const uint32_t addi_3_3
= 0x38630000;
3204 static const uint32_t addi_11_11
= 0x396b0000;
3205 static const uint32_t addi_12_1
= 0x39810000;
3206 static const uint32_t addi_12_12
= 0x398c0000;
3207 static const uint32_t addis_0_2
= 0x3c020000;
3208 static const uint32_t addis_0_13
= 0x3c0d0000;
3209 static const uint32_t addis_2_12
= 0x3c4c0000;
3210 static const uint32_t addis_11_2
= 0x3d620000;
3211 static const uint32_t addis_11_11
= 0x3d6b0000;
3212 static const uint32_t addis_11_30
= 0x3d7e0000;
3213 static const uint32_t addis_12_1
= 0x3d810000;
3214 static const uint32_t addis_12_2
= 0x3d820000;
3215 static const uint32_t addis_12_12
= 0x3d8c0000;
3216 static const uint32_t b
= 0x48000000;
3217 static const uint32_t bcl_20_31
= 0x429f0005;
3218 static const uint32_t bctr
= 0x4e800420;
3219 static const uint32_t blr
= 0x4e800020;
3220 static const uint32_t bnectr_p4
= 0x4ce20420;
3221 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3222 static const uint32_t cmpldi_2_0
= 0x28220000;
3223 static const uint32_t cror_15_15_15
= 0x4def7b82;
3224 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3225 static const uint32_t ld_0_1
= 0xe8010000;
3226 static const uint32_t ld_0_12
= 0xe80c0000;
3227 static const uint32_t ld_2_1
= 0xe8410000;
3228 static const uint32_t ld_2_2
= 0xe8420000;
3229 static const uint32_t ld_2_11
= 0xe84b0000;
3230 static const uint32_t ld_11_2
= 0xe9620000;
3231 static const uint32_t ld_11_11
= 0xe96b0000;
3232 static const uint32_t ld_12_2
= 0xe9820000;
3233 static const uint32_t ld_12_11
= 0xe98b0000;
3234 static const uint32_t ld_12_12
= 0xe98c0000;
3235 static const uint32_t lfd_0_1
= 0xc8010000;
3236 static const uint32_t li_0_0
= 0x38000000;
3237 static const uint32_t li_12_0
= 0x39800000;
3238 static const uint32_t lis_0
= 0x3c000000;
3239 static const uint32_t lis_11
= 0x3d600000;
3240 static const uint32_t lis_12
= 0x3d800000;
3241 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3242 static const uint32_t lwz_0_12
= 0x800c0000;
3243 static const uint32_t lwz_11_11
= 0x816b0000;
3244 static const uint32_t lwz_11_30
= 0x817e0000;
3245 static const uint32_t lwz_12_12
= 0x818c0000;
3246 static const uint32_t lwzu_0_12
= 0x840c0000;
3247 static const uint32_t mflr_0
= 0x7c0802a6;
3248 static const uint32_t mflr_11
= 0x7d6802a6;
3249 static const uint32_t mflr_12
= 0x7d8802a6;
3250 static const uint32_t mtctr_0
= 0x7c0903a6;
3251 static const uint32_t mtctr_11
= 0x7d6903a6;
3252 static const uint32_t mtctr_12
= 0x7d8903a6;
3253 static const uint32_t mtlr_0
= 0x7c0803a6;
3254 static const uint32_t mtlr_12
= 0x7d8803a6;
3255 static const uint32_t nop
= 0x60000000;
3256 static const uint32_t ori_0_0_0
= 0x60000000;
3257 static const uint32_t srdi_0_0_2
= 0x7800f082;
3258 static const uint32_t std_0_1
= 0xf8010000;
3259 static const uint32_t std_0_12
= 0xf80c0000;
3260 static const uint32_t std_2_1
= 0xf8410000;
3261 static const uint32_t stfd_0_1
= 0xd8010000;
3262 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3263 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3264 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3265 static const uint32_t xor_2_12_12
= 0x7d826278;
3266 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3268 // Write out the PLT.
3270 template<int size
, bool big_endian
>
3272 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3274 if (size
== 32 && this->name_
[3] != 'I')
3276 const section_size_type offset
= this->offset();
3277 const section_size_type oview_size
3278 = convert_to_section_size_type(this->data_size());
3279 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3280 unsigned char* pov
= oview
;
3281 unsigned char* endpov
= oview
+ oview_size
;
3283 // The address of the .glink branch table
3284 const Output_data_glink
<size
, big_endian
>* glink
3285 = this->targ_
->glink_section();
3286 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3288 while (pov
< endpov
)
3290 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3295 of
->write_output_view(offset
, oview_size
, oview
);
3299 // Create the PLT section.
3301 template<int size
, bool big_endian
>
3303 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3306 if (this->plt_
== NULL
)
3308 if (this->got_
== NULL
)
3309 this->got_section(symtab
, layout
);
3311 if (this->glink_
== NULL
)
3312 make_glink_section(layout
);
3314 // Ensure that .rela.dyn always appears before .rela.plt This is
3315 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3316 // needs to include .rela.plt in its range.
3317 this->rela_dyn_section(layout
);
3319 Reloc_section
* plt_rel
= new Reloc_section(false);
3320 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3321 elfcpp::SHF_ALLOC
, plt_rel
,
3322 ORDER_DYNAMIC_PLT_RELOCS
, false);
3324 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3326 layout
->add_output_section_data(".plt",
3328 ? elfcpp::SHT_PROGBITS
3329 : elfcpp::SHT_NOBITS
),
3330 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3339 // Create the IPLT section.
3341 template<int size
, bool big_endian
>
3343 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3346 if (this->iplt_
== NULL
)
3348 this->make_plt_section(symtab
, layout
);
3350 Reloc_section
* iplt_rel
= new Reloc_section(false);
3351 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3353 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3355 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3359 // A section for huge long branch addresses, similar to plt section.
3361 template<int size
, bool big_endian
>
3362 class Output_data_brlt_powerpc
: public Output_section_data_build
3365 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3366 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3367 size
, big_endian
> Reloc_section
;
3369 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3370 Reloc_section
* brlt_rel
)
3371 : Output_section_data_build(size
== 32 ? 4 : 8),
3379 this->reset_data_size();
3380 this->rel_
->reset_data_size();
3384 finalize_brlt_sizes()
3386 this->finalize_data_size();
3387 this->rel_
->finalize_data_size();
3390 // Add a reloc for an entry in the BRLT.
3392 add_reloc(Address to
, unsigned int off
)
3393 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3395 // Update section and reloc section size.
3397 set_current_size(unsigned int num_branches
)
3399 this->reset_address_and_file_offset();
3400 this->set_current_data_size(num_branches
* 16);
3401 this->finalize_data_size();
3402 Output_section
* os
= this->output_section();
3403 os
->set_section_offsets_need_adjustment();
3404 if (this->rel_
!= NULL
)
3406 unsigned int reloc_size
3407 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3408 this->rel_
->reset_address_and_file_offset();
3409 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3410 this->rel_
->finalize_data_size();
3411 Output_section
* os
= this->rel_
->output_section();
3412 os
->set_section_offsets_need_adjustment();
3418 do_adjust_output_section(Output_section
* os
)
3423 // Write to a map file.
3425 do_print_to_mapfile(Mapfile
* mapfile
) const
3426 { mapfile
->print_output_data(this, "** BRLT"); }
3429 // Write out the BRLT data.
3431 do_write(Output_file
*);
3433 // The reloc section.
3434 Reloc_section
* rel_
;
3435 Target_powerpc
<size
, big_endian
>* targ_
;
3438 // Make the branch lookup table section.
3440 template<int size
, bool big_endian
>
3442 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3444 if (size
== 64 && this->brlt_section_
== NULL
)
3446 Reloc_section
* brlt_rel
= NULL
;
3447 bool is_pic
= parameters
->options().output_is_position_independent();
3450 // When PIC we can't fill in .branch_lt (like .plt it can be
3451 // a bss style section) but must initialise at runtime via
3452 // dynamic relocats.
3453 this->rela_dyn_section(layout
);
3454 brlt_rel
= new Reloc_section(false);
3455 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3458 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3459 if (this->plt_
&& is_pic
)
3460 this->plt_
->output_section()
3461 ->add_output_section_data(this->brlt_section_
);
3463 layout
->add_output_section_data(".branch_lt",
3464 (is_pic
? elfcpp::SHT_NOBITS
3465 : elfcpp::SHT_PROGBITS
),
3466 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3467 this->brlt_section_
,
3468 (is_pic
? ORDER_SMALL_BSS
3469 : ORDER_SMALL_DATA
),
3474 // Write out .branch_lt when non-PIC.
3476 template<int size
, bool big_endian
>
3478 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3480 if (size
== 64 && !parameters
->options().output_is_position_independent())
3482 const section_size_type offset
= this->offset();
3483 const section_size_type oview_size
3484 = convert_to_section_size_type(this->data_size());
3485 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3487 this->targ_
->write_branch_lookup_table(oview
);
3488 of
->write_output_view(offset
, oview_size
, oview
);
3492 static inline uint32_t
3498 static inline uint32_t
3504 static inline uint32_t
3507 return hi(a
+ 0x8000);
3513 static const unsigned char eh_frame_cie
[12];
3517 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3520 'z', 'R', 0, // Augmentation string.
3521 4, // Code alignment.
3522 0x80 - size
/ 8 , // Data alignment.
3524 1, // Augmentation size.
3525 (elfcpp::DW_EH_PE_pcrel
3526 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3527 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3530 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3531 static const unsigned char glink_eh_frame_fde_64v1
[] =
3533 0, 0, 0, 0, // Replaced with offset to .glink.
3534 0, 0, 0, 0, // Replaced with size of .glink.
3535 0, // Augmentation size.
3536 elfcpp::DW_CFA_advance_loc
+ 1,
3537 elfcpp::DW_CFA_register
, 65, 12,
3538 elfcpp::DW_CFA_advance_loc
+ 4,
3539 elfcpp::DW_CFA_restore_extended
, 65
3542 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3543 static const unsigned char glink_eh_frame_fde_64v2
[] =
3545 0, 0, 0, 0, // Replaced with offset to .glink.
3546 0, 0, 0, 0, // Replaced with size of .glink.
3547 0, // Augmentation size.
3548 elfcpp::DW_CFA_advance_loc
+ 1,
3549 elfcpp::DW_CFA_register
, 65, 0,
3550 elfcpp::DW_CFA_advance_loc
+ 4,
3551 elfcpp::DW_CFA_restore_extended
, 65
3554 // Describe __glink_PLTresolve use of LR, 32-bit version.
3555 static const unsigned char glink_eh_frame_fde_32
[] =
3557 0, 0, 0, 0, // Replaced with offset to .glink.
3558 0, 0, 0, 0, // Replaced with size of .glink.
3559 0, // Augmentation size.
3560 elfcpp::DW_CFA_advance_loc
+ 2,
3561 elfcpp::DW_CFA_register
, 65, 0,
3562 elfcpp::DW_CFA_advance_loc
+ 4,
3563 elfcpp::DW_CFA_restore_extended
, 65
3566 static const unsigned char default_fde
[] =
3568 0, 0, 0, 0, // Replaced with offset to stubs.
3569 0, 0, 0, 0, // Replaced with size of stubs.
3570 0, // Augmentation size.
3571 elfcpp::DW_CFA_nop
, // Pad.
3576 template<bool big_endian
>
3578 write_insn(unsigned char* p
, uint32_t v
)
3580 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3583 // Stub_table holds information about plt and long branch stubs.
3584 // Stubs are built in an area following some input section determined
3585 // by group_sections(). This input section is converted to a relaxed
3586 // input section allowing it to be resized to accommodate the stubs
3588 template<int size
, bool big_endian
>
3589 class Stub_table
: public Output_relaxed_input_section
3592 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3593 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3595 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3596 Output_section
* output_section
,
3597 const Output_section::Input_section
* owner
)
3598 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3600 ->section_addralign(owner
->shndx())),
3601 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3602 orig_data_size_(owner
->current_data_size()),
3603 plt_size_(0), last_plt_size_(0),
3604 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3605 need_save_res_(false)
3607 this->set_output_section(output_section
);
3609 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3610 new_relaxed
.push_back(this);
3611 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3614 // Add a plt call stub.
3616 add_plt_call_entry(Address
,
3617 const Sized_relobj_file
<size
, big_endian
>*,
3623 add_plt_call_entry(Address
,
3624 const Sized_relobj_file
<size
, big_endian
>*,
3629 // Find a given plt call stub.
3631 find_plt_call_entry(const Symbol
*) const;
3634 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3635 unsigned int) const;
3638 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3644 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3649 // Add a long branch stub.
3651 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3652 unsigned int, Address
, Address
, bool);
3655 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3659 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3661 Address max_branch_offset
= max_branch_delta(r_type
);
3662 if (max_branch_offset
== 0)
3664 gold_assert(from
!= invalid_address
);
3665 Address loc
= off
+ this->stub_address();
3666 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3670 clear_stubs(bool all
)
3672 this->plt_call_stubs_
.clear();
3673 this->plt_size_
= 0;
3674 this->long_branch_stubs_
.clear();
3675 this->branch_size_
= 0;
3676 this->need_save_res_
= false;
3679 this->last_plt_size_
= 0;
3680 this->last_branch_size_
= 0;
3685 set_address_and_size(const Output_section
* os
, Address off
)
3687 Address start_off
= off
;
3688 off
+= this->orig_data_size_
;
3689 Address my_size
= this->plt_size_
+ this->branch_size_
;
3690 if (this->need_save_res_
)
3691 my_size
+= this->targ_
->savres_section()->data_size();
3693 off
= align_address(off
, this->stub_align());
3694 // Include original section size and alignment padding in size
3695 my_size
+= off
- start_off
;
3696 this->reset_address_and_file_offset();
3697 this->set_current_data_size(my_size
);
3698 this->set_address_and_file_offset(os
->address() + start_off
,
3699 os
->offset() + start_off
);
3704 stub_address() const
3706 return align_address(this->address() + this->orig_data_size_
,
3707 this->stub_align());
3713 return align_address(this->offset() + this->orig_data_size_
,
3714 this->stub_align());
3719 { return this->plt_size_
; }
3724 Output_section
* os
= this->output_section();
3725 if (os
->addralign() < this->stub_align())
3727 os
->set_addralign(this->stub_align());
3728 // FIXME: get rid of the insane checkpointing.
3729 // We can't increase alignment of the input section to which
3730 // stubs are attached; The input section may be .init which
3731 // is pasted together with other .init sections to form a
3732 // function. Aligning might insert zero padding resulting in
3733 // sigill. However we do need to increase alignment of the
3734 // output section so that the align_address() on offset in
3735 // set_address_and_size() adds the same padding as the
3736 // align_address() on address in stub_address().
3737 // What's more, we need this alignment for the layout done in
3738 // relaxation_loop_body() so that the output section starts at
3739 // a suitably aligned address.
3740 os
->checkpoint_set_addralign(this->stub_align());
3742 if (this->last_plt_size_
!= this->plt_size_
3743 || this->last_branch_size_
!= this->branch_size_
)
3745 this->last_plt_size_
= this->plt_size_
;
3746 this->last_branch_size_
= this->branch_size_
;
3752 // Add .eh_frame info for this stub section. Unlike other linker
3753 // generated .eh_frame this is added late in the link, because we
3754 // only want the .eh_frame info if this particular stub section is
3757 add_eh_frame(Layout
* layout
)
3759 if (!this->eh_frame_added_
)
3761 if (!parameters
->options().ld_generated_unwind_info())
3764 // Since we add stub .eh_frame info late, it must be placed
3765 // after all other linker generated .eh_frame info so that
3766 // merge mapping need not be updated for input sections.
3767 // There is no provision to use a different CIE to that used
3769 if (!this->targ_
->has_glink())
3772 layout
->add_eh_frame_for_plt(this,
3773 Eh_cie
<size
>::eh_frame_cie
,
3774 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3776 sizeof (default_fde
));
3777 this->eh_frame_added_
= true;
3781 Target_powerpc
<size
, big_endian
>*
3787 class Plt_stub_ent_hash
;
3788 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3789 Plt_stub_ent_hash
> Plt_stub_entries
;
3791 // Alignment of stub section.
3797 unsigned int min_align
= 32;
3798 unsigned int user_align
= 1 << parameters
->options().plt_align();
3799 return std::max(user_align
, min_align
);
3802 // Return the plt offset for the given call stub.
3804 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3806 const Symbol
* gsym
= p
->first
.sym_
;
3809 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3810 && gsym
->can_use_relative_reloc(false));
3811 return gsym
->plt_offset();
3816 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3817 unsigned int local_sym_index
= p
->first
.locsym_
;
3818 return relobj
->local_plt_offset(local_sym_index
);
3822 // Size of a given plt call stub.
3824 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3830 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3832 plt_addr
+= this->targ_
->iplt_section()->address();
3834 plt_addr
+= this->targ_
->plt_section()->address();
3835 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3836 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3837 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3838 got_addr
+= ppcobj
->toc_base_offset();
3839 Address off
= plt_addr
- got_addr
;
3840 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3841 if (this->targ_
->abiversion() < 2)
3843 bool static_chain
= parameters
->options().plt_static_chain();
3844 bool thread_safe
= this->targ_
->plt_thread_safe();
3848 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3850 unsigned int align
= 1 << parameters
->options().plt_align();
3852 bytes
= (bytes
+ align
- 1) & -align
;
3856 // Return long branch stub size.
3858 branch_stub_size(Address to
)
3861 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3862 if (to
- loc
+ (1 << 25) < 2 << 25)
3864 if (size
== 64 || !parameters
->options().output_is_position_independent())
3871 do_write(Output_file
*);
3873 // Plt call stub keys.
3877 Plt_stub_ent(const Symbol
* sym
)
3878 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3881 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3882 unsigned int locsym_index
)
3883 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3886 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3888 unsigned int r_type
,
3890 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3893 this->addend_
= addend
;
3894 else if (parameters
->options().output_is_position_independent()
3895 && r_type
== elfcpp::R_PPC_PLTREL24
)
3897 this->addend_
= addend
;
3898 if (this->addend_
>= 32768)
3899 this->object_
= object
;
3903 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3904 unsigned int locsym_index
,
3905 unsigned int r_type
,
3907 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3910 this->addend_
= addend
;
3911 else if (parameters
->options().output_is_position_independent()
3912 && r_type
== elfcpp::R_PPC_PLTREL24
)
3913 this->addend_
= addend
;
3916 bool operator==(const Plt_stub_ent
& that
) const
3918 return (this->sym_
== that
.sym_
3919 && this->object_
== that
.object_
3920 && this->addend_
== that
.addend_
3921 && this->locsym_
== that
.locsym_
);
3925 const Sized_relobj_file
<size
, big_endian
>* object_
;
3926 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3927 unsigned int locsym_
;
3930 class Plt_stub_ent_hash
3933 size_t operator()(const Plt_stub_ent
& ent
) const
3935 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3936 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3942 // Long branch stub keys.
3943 class Branch_stub_ent
3946 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
3947 Address to
, bool save_res
)
3948 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
3951 toc_base_off_
= obj
->toc_base_offset();
3954 bool operator==(const Branch_stub_ent
& that
) const
3956 return (this->dest_
== that
.dest_
3958 || this->toc_base_off_
== that
.toc_base_off_
));
3962 unsigned int toc_base_off_
;
3966 class Branch_stub_ent_hash
3969 size_t operator()(const Branch_stub_ent
& ent
) const
3970 { return ent
.dest_
^ ent
.toc_base_off_
; }
3973 // In a sane world this would be a global.
3974 Target_powerpc
<size
, big_endian
>* targ_
;
3975 // Map sym/object/addend to stub offset.
3976 Plt_stub_entries plt_call_stubs_
;
3977 // Map destination address to stub offset.
3978 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3979 Branch_stub_ent_hash
> Branch_stub_entries
;
3980 Branch_stub_entries long_branch_stubs_
;
3981 // size of input section
3982 section_size_type orig_data_size_
;
3984 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3985 // Whether .eh_frame info has been created for this stub section.
3986 bool eh_frame_added_
;
3987 // Set if this stub group needs a copy of out-of-line register
3988 // save/restore functions.
3989 bool need_save_res_
;
3992 // Add a plt call stub, if we do not already have one for this
3993 // sym/object/addend combo.
3995 template<int size
, bool big_endian
>
3997 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3999 const Sized_relobj_file
<size
, big_endian
>* object
,
4001 unsigned int r_type
,
4004 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4005 unsigned int off
= this->plt_size_
;
4006 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4007 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4009 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4010 return this->can_reach_stub(from
, off
, r_type
);
4013 template<int size
, bool big_endian
>
4015 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4017 const Sized_relobj_file
<size
, big_endian
>* object
,
4018 unsigned int locsym_index
,
4019 unsigned int r_type
,
4022 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4023 unsigned int off
= this->plt_size_
;
4024 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4025 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4027 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4028 return this->can_reach_stub(from
, off
, r_type
);
4031 // Find a plt call stub.
4033 template<int size
, bool big_endian
>
4034 typename Stub_table
<size
, big_endian
>::Address
4035 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4036 const Sized_relobj_file
<size
, big_endian
>* object
,
4038 unsigned int r_type
,
4039 Address addend
) const
4041 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4042 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4043 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4046 template<int size
, bool big_endian
>
4047 typename Stub_table
<size
, big_endian
>::Address
4048 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4050 Plt_stub_ent
ent(gsym
);
4051 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4052 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4055 template<int size
, bool big_endian
>
4056 typename Stub_table
<size
, big_endian
>::Address
4057 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4058 const Sized_relobj_file
<size
, big_endian
>* object
,
4059 unsigned int locsym_index
,
4060 unsigned int r_type
,
4061 Address addend
) const
4063 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4064 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4065 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4068 template<int size
, bool big_endian
>
4069 typename Stub_table
<size
, big_endian
>::Address
4070 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4071 const Sized_relobj_file
<size
, big_endian
>* object
,
4072 unsigned int locsym_index
) const
4074 Plt_stub_ent
ent(object
, locsym_index
);
4075 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4076 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4079 // Add a long branch stub if we don't already have one to given
4082 template<int size
, bool big_endian
>
4084 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4085 const Powerpc_relobj
<size
, big_endian
>* object
,
4086 unsigned int r_type
,
4091 Branch_stub_ent
ent(object
, to
, save_res
);
4092 Address off
= this->branch_size_
;
4093 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4096 this->need_save_res_
= true;
4099 unsigned int stub_size
= this->branch_stub_size(to
);
4100 this->branch_size_
= off
+ stub_size
;
4101 if (size
== 64 && stub_size
!= 4)
4102 this->targ_
->add_branch_lookup_table(to
);
4105 return this->can_reach_stub(from
, off
, r_type
);
4108 // Find long branch stub offset.
4110 template<int size
, bool big_endian
>
4111 typename Stub_table
<size
, big_endian
>::Address
4112 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4113 const Powerpc_relobj
<size
, big_endian
>* object
,
4116 Branch_stub_ent
ent(object
, to
, false);
4117 typename
Branch_stub_entries::const_iterator p
4118 = this->long_branch_stubs_
.find(ent
);
4119 if (p
== this->long_branch_stubs_
.end())
4120 return invalid_address
;
4121 if (p
->first
.save_res_
)
4122 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4126 // A class to handle .glink.
4128 template<int size
, bool big_endian
>
4129 class Output_data_glink
: public Output_section_data
4132 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4133 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4134 static const int pltresolve_size
= 16*4;
4136 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4137 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4138 end_branch_table_(), ge_size_(0)
4142 add_eh_frame(Layout
* layout
);
4145 add_global_entry(const Symbol
*);
4148 find_global_entry(const Symbol
*) const;
4151 global_entry_address() const
4153 gold_assert(this->is_data_size_valid());
4154 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4155 return this->address() + global_entry_off
;
4159 // Write to a map file.
4161 do_print_to_mapfile(Mapfile
* mapfile
) const
4162 { mapfile
->print_output_data(this, _("** glink")); }
4166 set_final_data_size();
4170 do_write(Output_file
*);
4172 // Allows access to .got and .plt for do_write.
4173 Target_powerpc
<size
, big_endian
>* targ_
;
4175 // Map sym to stub offset.
4176 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4177 Global_entry_stub_entries global_entry_stubs_
;
4179 unsigned int end_branch_table_
, ge_size_
;
4182 template<int size
, bool big_endian
>
4184 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4186 if (!parameters
->options().ld_generated_unwind_info())
4191 if (this->targ_
->abiversion() < 2)
4192 layout
->add_eh_frame_for_plt(this,
4193 Eh_cie
<64>::eh_frame_cie
,
4194 sizeof (Eh_cie
<64>::eh_frame_cie
),
4195 glink_eh_frame_fde_64v1
,
4196 sizeof (glink_eh_frame_fde_64v1
));
4198 layout
->add_eh_frame_for_plt(this,
4199 Eh_cie
<64>::eh_frame_cie
,
4200 sizeof (Eh_cie
<64>::eh_frame_cie
),
4201 glink_eh_frame_fde_64v2
,
4202 sizeof (glink_eh_frame_fde_64v2
));
4206 // 32-bit .glink can use the default since the CIE return
4207 // address reg, LR, is valid.
4208 layout
->add_eh_frame_for_plt(this,
4209 Eh_cie
<32>::eh_frame_cie
,
4210 sizeof (Eh_cie
<32>::eh_frame_cie
),
4212 sizeof (default_fde
));
4213 // Except where LR is used in a PIC __glink_PLTresolve.
4214 if (parameters
->options().output_is_position_independent())
4215 layout
->add_eh_frame_for_plt(this,
4216 Eh_cie
<32>::eh_frame_cie
,
4217 sizeof (Eh_cie
<32>::eh_frame_cie
),
4218 glink_eh_frame_fde_32
,
4219 sizeof (glink_eh_frame_fde_32
));
4223 template<int size
, bool big_endian
>
4225 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4227 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4228 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4230 this->ge_size_
+= 16;
4233 template<int size
, bool big_endian
>
4234 typename Output_data_glink
<size
, big_endian
>::Address
4235 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4237 typename
Global_entry_stub_entries::const_iterator p
4238 = this->global_entry_stubs_
.find(gsym
);
4239 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4242 template<int size
, bool big_endian
>
4244 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4246 unsigned int count
= this->targ_
->plt_entry_count();
4247 section_size_type total
= 0;
4253 // space for branch table
4254 total
+= 4 * (count
- 1);
4256 total
+= -total
& 15;
4257 total
+= this->pltresolve_size
;
4261 total
+= this->pltresolve_size
;
4263 // space for branch table
4265 if (this->targ_
->abiversion() < 2)
4269 total
+= 4 * (count
- 0x8000);
4273 this->end_branch_table_
= total
;
4274 total
= (total
+ 15) & -16;
4275 total
+= this->ge_size_
;
4277 this->set_data_size(total
);
4280 // Write out plt and long branch stub code.
4282 template<int size
, bool big_endian
>
4284 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4286 if (this->plt_call_stubs_
.empty()
4287 && this->long_branch_stubs_
.empty())
4290 const section_size_type start_off
= this->offset();
4291 const section_size_type off
= this->stub_offset();
4292 const section_size_type oview_size
=
4293 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4294 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4299 const Output_data_got_powerpc
<size
, big_endian
>* got
4300 = this->targ_
->got_section();
4301 Address got_os_addr
= got
->output_section()->address();
4303 if (!this->plt_call_stubs_
.empty())
4305 // The base address of the .plt section.
4306 Address plt_base
= this->targ_
->plt_section()->address();
4307 Address iplt_base
= invalid_address
;
4309 // Write out plt call stubs.
4310 typename
Plt_stub_entries::const_iterator cs
;
4311 for (cs
= this->plt_call_stubs_
.begin();
4312 cs
!= this->plt_call_stubs_
.end();
4316 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4317 Address plt_addr
= pltoff
;
4320 if (iplt_base
== invalid_address
)
4321 iplt_base
= this->targ_
->iplt_section()->address();
4322 plt_addr
+= iplt_base
;
4325 plt_addr
+= plt_base
;
4326 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4327 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4328 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4329 Address off
= plt_addr
- got_addr
;
4331 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4332 gold_error(_("%s: linkage table error against `%s'"),
4333 cs
->first
.object_
->name().c_str(),
4334 cs
->first
.sym_
->demangled_name().c_str());
4336 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4338 = plt_load_toc
&& parameters
->options().plt_static_chain();
4340 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4341 bool use_fake_dep
= false;
4342 Address cmp_branch_off
= 0;
4345 unsigned int pltindex
4346 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4347 / this->targ_
->plt_entry_size());
4349 = (this->targ_
->glink_section()->pltresolve_size
4351 if (pltindex
> 32768)
4352 glinkoff
+= (pltindex
- 32768) * 4;
4354 = this->targ_
->glink_section()->address() + glinkoff
;
4356 = (this->stub_address() + cs
->second
+ 24
4357 + 4 * (ha(off
) != 0)
4358 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4359 + 4 * static_chain
);
4360 cmp_branch_off
= to
- from
;
4361 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4364 p
= oview
+ cs
->second
;
4367 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4371 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4373 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4378 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4380 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4384 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4386 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4390 write_insn
<big_endian
>(p
, mtctr_12
);
4396 write_insn
<big_endian
>(p
, xor_2_12_12
);
4398 write_insn
<big_endian
>(p
, add_11_11_2
);
4401 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4405 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4412 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4414 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4417 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4419 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4423 write_insn
<big_endian
>(p
, mtctr_12
);
4429 write_insn
<big_endian
>(p
, xor_11_12_12
);
4431 write_insn
<big_endian
>(p
, add_2_2_11
);
4436 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4439 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4443 if (thread_safe
&& !use_fake_dep
)
4445 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4447 write_insn
<big_endian
>(p
, bnectr_p4
);
4449 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4452 write_insn
<big_endian
>(p
, bctr
);
4456 // Write out long branch stubs.
4457 typename
Branch_stub_entries::const_iterator bs
;
4458 for (bs
= this->long_branch_stubs_
.begin();
4459 bs
!= this->long_branch_stubs_
.end();
4462 if (bs
->first
.save_res_
)
4464 p
= oview
+ this->plt_size_
+ bs
->second
;
4465 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4466 Address delta
= bs
->first
.dest_
- loc
;
4467 if (delta
+ (1 << 25) < 2 << 25)
4468 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4472 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4473 gold_assert(brlt_addr
!= invalid_address
);
4474 brlt_addr
+= this->targ_
->brlt_section()->address();
4475 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4476 Address brltoff
= brlt_addr
- got_addr
;
4477 if (ha(brltoff
) == 0)
4479 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4483 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4484 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4486 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4487 write_insn
<big_endian
>(p
, bctr
);
4493 if (!this->plt_call_stubs_
.empty())
4495 // The base address of the .plt section.
4496 Address plt_base
= this->targ_
->plt_section()->address();
4497 Address iplt_base
= invalid_address
;
4498 // The address of _GLOBAL_OFFSET_TABLE_.
4499 Address g_o_t
= invalid_address
;
4501 // Write out plt call stubs.
4502 typename
Plt_stub_entries::const_iterator cs
;
4503 for (cs
= this->plt_call_stubs_
.begin();
4504 cs
!= this->plt_call_stubs_
.end();
4508 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4511 if (iplt_base
== invalid_address
)
4512 iplt_base
= this->targ_
->iplt_section()->address();
4513 plt_addr
+= iplt_base
;
4516 plt_addr
+= plt_base
;
4518 p
= oview
+ cs
->second
;
4519 if (parameters
->options().output_is_position_independent())
4522 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4523 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4524 (cs
->first
.object_
));
4525 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4527 unsigned int got2
= ppcobj
->got2_shndx();
4528 got_addr
= ppcobj
->get_output_section_offset(got2
);
4529 gold_assert(got_addr
!= invalid_address
);
4530 got_addr
+= (ppcobj
->output_section(got2
)->address()
4531 + cs
->first
.addend_
);
4535 if (g_o_t
== invalid_address
)
4537 const Output_data_got_powerpc
<size
, big_endian
>* got
4538 = this->targ_
->got_section();
4539 g_o_t
= got
->address() + got
->g_o_t();
4544 Address off
= plt_addr
- got_addr
;
4547 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4548 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4549 write_insn
<big_endian
>(p
+ 8, bctr
);
4553 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4554 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4555 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4556 write_insn
<big_endian
>(p
+ 12, bctr
);
4561 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4562 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4563 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4564 write_insn
<big_endian
>(p
+ 12, bctr
);
4569 // Write out long branch stubs.
4570 typename
Branch_stub_entries::const_iterator bs
;
4571 for (bs
= this->long_branch_stubs_
.begin();
4572 bs
!= this->long_branch_stubs_
.end();
4575 if (bs
->first
.save_res_
)
4577 p
= oview
+ this->plt_size_
+ bs
->second
;
4578 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4579 Address delta
= bs
->first
.dest_
- loc
;
4580 if (delta
+ (1 << 25) < 2 << 25)
4581 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4582 else if (!parameters
->options().output_is_position_independent())
4584 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4585 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4586 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4587 write_insn
<big_endian
>(p
+ 12, bctr
);
4592 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4593 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4594 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4595 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4596 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4597 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4598 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4599 write_insn
<big_endian
>(p
+ 28, bctr
);
4603 if (this->need_save_res_
)
4605 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4606 memcpy (p
, this->targ_
->savres_section()->contents(),
4607 this->targ_
->savres_section()->data_size());
4611 // Write out .glink.
4613 template<int size
, bool big_endian
>
4615 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4617 const section_size_type off
= this->offset();
4618 const section_size_type oview_size
=
4619 convert_to_section_size_type(this->data_size());
4620 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4623 // The base address of the .plt section.
4624 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4625 Address plt_base
= this->targ_
->plt_section()->address();
4629 if (this->end_branch_table_
!= 0)
4631 // Write pltresolve stub.
4633 Address after_bcl
= this->address() + 16;
4634 Address pltoff
= plt_base
- after_bcl
;
4636 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4638 if (this->targ_
->abiversion() < 2)
4640 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4641 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4642 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4643 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4644 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4645 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4646 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4647 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4648 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4649 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4653 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4654 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4655 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4656 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4657 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4658 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4659 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4660 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4661 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4662 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4663 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4664 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4666 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4667 while (p
< oview
+ this->pltresolve_size
)
4668 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4670 // Write lazy link call stubs.
4672 while (p
< oview
+ this->end_branch_table_
)
4674 if (this->targ_
->abiversion() < 2)
4678 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4682 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4683 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4686 uint32_t branch_off
= 8 - (p
- oview
);
4687 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4692 Address plt_base
= this->targ_
->plt_section()->address();
4693 Address iplt_base
= invalid_address
;
4694 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4695 Address global_entry_base
= this->address() + global_entry_off
;
4696 typename
Global_entry_stub_entries::const_iterator ge
;
4697 for (ge
= this->global_entry_stubs_
.begin();
4698 ge
!= this->global_entry_stubs_
.end();
4701 p
= oview
+ global_entry_off
+ ge
->second
;
4702 Address plt_addr
= ge
->first
->plt_offset();
4703 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4704 && ge
->first
->can_use_relative_reloc(false))
4706 if (iplt_base
== invalid_address
)
4707 iplt_base
= this->targ_
->iplt_section()->address();
4708 plt_addr
+= iplt_base
;
4711 plt_addr
+= plt_base
;
4712 Address my_addr
= global_entry_base
+ ge
->second
;
4713 Address off
= plt_addr
- my_addr
;
4715 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4716 gold_error(_("%s: linkage table error against `%s'"),
4717 ge
->first
->object()->name().c_str(),
4718 ge
->first
->demangled_name().c_str());
4720 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4721 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4722 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4723 write_insn
<big_endian
>(p
, bctr
);
4728 const Output_data_got_powerpc
<size
, big_endian
>* got
4729 = this->targ_
->got_section();
4730 // The address of _GLOBAL_OFFSET_TABLE_.
4731 Address g_o_t
= got
->address() + got
->g_o_t();
4733 // Write out pltresolve branch table.
4735 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4736 unsigned char* end_p
= oview
+ the_end
;
4737 while (p
< end_p
- 8 * 4)
4738 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4740 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4742 // Write out pltresolve call stub.
4743 if (parameters
->options().output_is_position_independent())
4745 Address res0_off
= 0;
4746 Address after_bcl_off
= the_end
+ 12;
4747 Address bcl_res0
= after_bcl_off
- res0_off
;
4749 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4750 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4751 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4752 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4753 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4754 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4755 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4757 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4759 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4760 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4762 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4763 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4767 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4768 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4770 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4771 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4772 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4773 write_insn
<big_endian
>(p
+ 52, bctr
);
4774 write_insn
<big_endian
>(p
+ 56, nop
);
4775 write_insn
<big_endian
>(p
+ 60, nop
);
4779 Address res0
= this->address();
4781 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4782 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4783 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4784 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4786 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4787 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4788 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4789 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4790 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4791 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4793 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4794 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4795 write_insn
<big_endian
>(p
+ 32, bctr
);
4796 write_insn
<big_endian
>(p
+ 36, nop
);
4797 write_insn
<big_endian
>(p
+ 40, nop
);
4798 write_insn
<big_endian
>(p
+ 44, nop
);
4799 write_insn
<big_endian
>(p
+ 48, nop
);
4800 write_insn
<big_endian
>(p
+ 52, nop
);
4801 write_insn
<big_endian
>(p
+ 56, nop
);
4802 write_insn
<big_endian
>(p
+ 60, nop
);
4807 of
->write_output_view(off
, oview_size
, oview
);
4811 // A class to handle linker generated save/restore functions.
4813 template<int size
, bool big_endian
>
4814 class Output_data_save_res
: public Output_section_data_build
4817 Output_data_save_res(Symbol_table
* symtab
);
4819 const unsigned char*
4826 // Write to a map file.
4828 do_print_to_mapfile(Mapfile
* mapfile
) const
4829 { mapfile
->print_output_data(this, _("** save/restore")); }
4832 do_write(Output_file
*);
4835 // The maximum size of save/restore contents.
4836 static const unsigned int savres_max
= 218*4;
4839 savres_define(Symbol_table
* symtab
,
4841 unsigned int lo
, unsigned int hi
,
4842 unsigned char* write_ent(unsigned char*, int),
4843 unsigned char* write_tail(unsigned char*, int));
4845 unsigned char *contents_
;
4848 template<bool big_endian
>
4849 static unsigned char*
4850 savegpr0(unsigned char* p
, int r
)
4852 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4853 write_insn
<big_endian
>(p
, insn
);
4857 template<bool big_endian
>
4858 static unsigned char*
4859 savegpr0_tail(unsigned char* p
, int r
)
4861 p
= savegpr0
<big_endian
>(p
, r
);
4862 uint32_t insn
= std_0_1
+ 16;
4863 write_insn
<big_endian
>(p
, insn
);
4865 write_insn
<big_endian
>(p
, blr
);
4869 template<bool big_endian
>
4870 static unsigned char*
4871 restgpr0(unsigned char* p
, int r
)
4873 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4874 write_insn
<big_endian
>(p
, insn
);
4878 template<bool big_endian
>
4879 static unsigned char*
4880 restgpr0_tail(unsigned char* p
, int r
)
4882 uint32_t insn
= ld_0_1
+ 16;
4883 write_insn
<big_endian
>(p
, insn
);
4885 p
= restgpr0
<big_endian
>(p
, r
);
4886 write_insn
<big_endian
>(p
, mtlr_0
);
4890 p
= restgpr0
<big_endian
>(p
, 30);
4891 p
= restgpr0
<big_endian
>(p
, 31);
4893 write_insn
<big_endian
>(p
, blr
);
4897 template<bool big_endian
>
4898 static unsigned char*
4899 savegpr1(unsigned char* p
, int r
)
4901 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4902 write_insn
<big_endian
>(p
, insn
);
4906 template<bool big_endian
>
4907 static unsigned char*
4908 savegpr1_tail(unsigned char* p
, int r
)
4910 p
= savegpr1
<big_endian
>(p
, r
);
4911 write_insn
<big_endian
>(p
, blr
);
4915 template<bool big_endian
>
4916 static unsigned char*
4917 restgpr1(unsigned char* p
, int r
)
4919 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4920 write_insn
<big_endian
>(p
, insn
);
4924 template<bool big_endian
>
4925 static unsigned char*
4926 restgpr1_tail(unsigned char* p
, int r
)
4928 p
= restgpr1
<big_endian
>(p
, r
);
4929 write_insn
<big_endian
>(p
, blr
);
4933 template<bool big_endian
>
4934 static unsigned char*
4935 savefpr(unsigned char* p
, int r
)
4937 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4938 write_insn
<big_endian
>(p
, insn
);
4942 template<bool big_endian
>
4943 static unsigned char*
4944 savefpr0_tail(unsigned char* p
, int r
)
4946 p
= savefpr
<big_endian
>(p
, r
);
4947 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4949 write_insn
<big_endian
>(p
, blr
);
4953 template<bool big_endian
>
4954 static unsigned char*
4955 restfpr(unsigned char* p
, int r
)
4957 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4958 write_insn
<big_endian
>(p
, insn
);
4962 template<bool big_endian
>
4963 static unsigned char*
4964 restfpr0_tail(unsigned char* p
, int r
)
4966 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4968 p
= restfpr
<big_endian
>(p
, r
);
4969 write_insn
<big_endian
>(p
, mtlr_0
);
4973 p
= restfpr
<big_endian
>(p
, 30);
4974 p
= restfpr
<big_endian
>(p
, 31);
4976 write_insn
<big_endian
>(p
, blr
);
4980 template<bool big_endian
>
4981 static unsigned char*
4982 savefpr1_tail(unsigned char* p
, int r
)
4984 p
= savefpr
<big_endian
>(p
, r
);
4985 write_insn
<big_endian
>(p
, blr
);
4989 template<bool big_endian
>
4990 static unsigned char*
4991 restfpr1_tail(unsigned char* p
, int r
)
4993 p
= restfpr
<big_endian
>(p
, r
);
4994 write_insn
<big_endian
>(p
, blr
);
4998 template<bool big_endian
>
4999 static unsigned char*
5000 savevr(unsigned char* p
, int r
)
5002 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5003 write_insn
<big_endian
>(p
, insn
);
5005 insn
= stvx_0_12_0
+ (r
<< 21);
5006 write_insn
<big_endian
>(p
, insn
);
5010 template<bool big_endian
>
5011 static unsigned char*
5012 savevr_tail(unsigned char* p
, int r
)
5014 p
= savevr
<big_endian
>(p
, r
);
5015 write_insn
<big_endian
>(p
, blr
);
5019 template<bool big_endian
>
5020 static unsigned char*
5021 restvr(unsigned char* p
, int r
)
5023 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5024 write_insn
<big_endian
>(p
, insn
);
5026 insn
= lvx_0_12_0
+ (r
<< 21);
5027 write_insn
<big_endian
>(p
, insn
);
5031 template<bool big_endian
>
5032 static unsigned char*
5033 restvr_tail(unsigned char* p
, int r
)
5035 p
= restvr
<big_endian
>(p
, r
);
5036 write_insn
<big_endian
>(p
, blr
);
5041 template<int size
, bool big_endian
>
5042 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5043 Symbol_table
* symtab
)
5044 : Output_section_data_build(4),
5047 this->savres_define(symtab
,
5048 "_savegpr0_", 14, 31,
5049 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5050 this->savres_define(symtab
,
5051 "_restgpr0_", 14, 29,
5052 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5053 this->savres_define(symtab
,
5054 "_restgpr0_", 30, 31,
5055 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5056 this->savres_define(symtab
,
5057 "_savegpr1_", 14, 31,
5058 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5059 this->savres_define(symtab
,
5060 "_restgpr1_", 14, 31,
5061 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5062 this->savres_define(symtab
,
5063 "_savefpr_", 14, 31,
5064 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5065 this->savres_define(symtab
,
5066 "_restfpr_", 14, 29,
5067 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5068 this->savres_define(symtab
,
5069 "_restfpr_", 30, 31,
5070 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5071 this->savres_define(symtab
,
5073 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5074 this->savres_define(symtab
,
5076 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5077 this->savres_define(symtab
,
5079 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5080 this->savres_define(symtab
,
5082 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5085 template<int size
, bool big_endian
>
5087 Output_data_save_res
<size
, big_endian
>::savres_define(
5088 Symbol_table
* symtab
,
5090 unsigned int lo
, unsigned int hi
,
5091 unsigned char* write_ent(unsigned char*, int),
5092 unsigned char* write_tail(unsigned char*, int))
5094 size_t len
= strlen(name
);
5095 bool writing
= false;
5098 memcpy(sym
, name
, len
);
5101 for (unsigned int i
= lo
; i
<= hi
; i
++)
5103 sym
[len
+ 0] = i
/ 10 + '0';
5104 sym
[len
+ 1] = i
% 10 + '0';
5105 Symbol
* gsym
= symtab
->lookup(sym
);
5106 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5107 writing
= writing
|| refd
;
5110 if (this->contents_
== NULL
)
5111 this->contents_
= new unsigned char[this->savres_max
];
5113 section_size_type value
= this->current_data_size();
5114 unsigned char* p
= this->contents_
+ value
;
5116 p
= write_ent(p
, i
);
5118 p
= write_tail(p
, i
);
5119 section_size_type cur_size
= p
- this->contents_
;
5120 this->set_current_data_size(cur_size
);
5122 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5123 this, value
, cur_size
- value
,
5124 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5125 elfcpp::STV_HIDDEN
, 0, false, false);
5130 // Write out save/restore.
5132 template<int size
, bool big_endian
>
5134 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5136 const section_size_type off
= this->offset();
5137 const section_size_type oview_size
=
5138 convert_to_section_size_type(this->data_size());
5139 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5140 memcpy(oview
, this->contents_
, oview_size
);
5141 of
->write_output_view(off
, oview_size
, oview
);
5145 // Create the glink section.
5147 template<int size
, bool big_endian
>
5149 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5151 if (this->glink_
== NULL
)
5153 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5154 this->glink_
->add_eh_frame(layout
);
5155 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5156 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5157 this->glink_
, ORDER_TEXT
, false);
5161 // Create a PLT entry for a global symbol.
5163 template<int size
, bool big_endian
>
5165 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5169 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5170 && gsym
->can_use_relative_reloc(false))
5172 if (this->iplt_
== NULL
)
5173 this->make_iplt_section(symtab
, layout
);
5174 this->iplt_
->add_ifunc_entry(gsym
);
5178 if (this->plt_
== NULL
)
5179 this->make_plt_section(symtab
, layout
);
5180 this->plt_
->add_entry(gsym
);
5184 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5186 template<int size
, bool big_endian
>
5188 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5189 Symbol_table
* symtab
,
5191 Sized_relobj_file
<size
, big_endian
>* relobj
,
5194 if (this->iplt_
== NULL
)
5195 this->make_iplt_section(symtab
, layout
);
5196 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5199 // Return the number of entries in the PLT.
5201 template<int size
, bool big_endian
>
5203 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5205 if (this->plt_
== NULL
)
5207 return this->plt_
->entry_count();
5210 // Create a GOT entry for local dynamic __tls_get_addr calls.
5212 template<int size
, bool big_endian
>
5214 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5215 Symbol_table
* symtab
,
5217 Sized_relobj_file
<size
, big_endian
>* object
)
5219 if (this->tlsld_got_offset_
== -1U)
5221 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5222 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5223 Output_data_got_powerpc
<size
, big_endian
>* got
5224 = this->got_section(symtab
, layout
);
5225 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5226 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5228 this->tlsld_got_offset_
= got_offset
;
5230 return this->tlsld_got_offset_
;
5233 // Get the Reference_flags for a particular relocation.
5235 template<int size
, bool big_endian
>
5237 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5238 unsigned int r_type
,
5239 const Target_powerpc
* target
)
5245 case elfcpp::R_POWERPC_NONE
:
5246 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5247 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5248 case elfcpp::R_PPC64_TOC
:
5249 // No symbol reference.
5252 case elfcpp::R_PPC64_ADDR64
:
5253 case elfcpp::R_PPC64_UADDR64
:
5254 case elfcpp::R_POWERPC_ADDR32
:
5255 case elfcpp::R_POWERPC_UADDR32
:
5256 case elfcpp::R_POWERPC_ADDR16
:
5257 case elfcpp::R_POWERPC_UADDR16
:
5258 case elfcpp::R_POWERPC_ADDR16_LO
:
5259 case elfcpp::R_POWERPC_ADDR16_HI
:
5260 case elfcpp::R_POWERPC_ADDR16_HA
:
5261 ref
= Symbol::ABSOLUTE_REF
;
5264 case elfcpp::R_POWERPC_ADDR24
:
5265 case elfcpp::R_POWERPC_ADDR14
:
5266 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5267 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5268 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5271 case elfcpp::R_PPC64_REL64
:
5272 case elfcpp::R_POWERPC_REL32
:
5273 case elfcpp::R_PPC_LOCAL24PC
:
5274 case elfcpp::R_POWERPC_REL16
:
5275 case elfcpp::R_POWERPC_REL16_LO
:
5276 case elfcpp::R_POWERPC_REL16_HI
:
5277 case elfcpp::R_POWERPC_REL16_HA
:
5278 ref
= Symbol::RELATIVE_REF
;
5281 case elfcpp::R_POWERPC_REL24
:
5282 case elfcpp::R_PPC_PLTREL24
:
5283 case elfcpp::R_POWERPC_REL14
:
5284 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5285 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5286 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5289 case elfcpp::R_POWERPC_GOT16
:
5290 case elfcpp::R_POWERPC_GOT16_LO
:
5291 case elfcpp::R_POWERPC_GOT16_HI
:
5292 case elfcpp::R_POWERPC_GOT16_HA
:
5293 case elfcpp::R_PPC64_GOT16_DS
:
5294 case elfcpp::R_PPC64_GOT16_LO_DS
:
5295 case elfcpp::R_PPC64_TOC16
:
5296 case elfcpp::R_PPC64_TOC16_LO
:
5297 case elfcpp::R_PPC64_TOC16_HI
:
5298 case elfcpp::R_PPC64_TOC16_HA
:
5299 case elfcpp::R_PPC64_TOC16_DS
:
5300 case elfcpp::R_PPC64_TOC16_LO_DS
:
5302 ref
= Symbol::ABSOLUTE_REF
;
5305 case elfcpp::R_POWERPC_GOT_TPREL16
:
5306 case elfcpp::R_POWERPC_TLS
:
5307 ref
= Symbol::TLS_REF
;
5310 case elfcpp::R_POWERPC_COPY
:
5311 case elfcpp::R_POWERPC_GLOB_DAT
:
5312 case elfcpp::R_POWERPC_JMP_SLOT
:
5313 case elfcpp::R_POWERPC_RELATIVE
:
5314 case elfcpp::R_POWERPC_DTPMOD
:
5316 // Not expected. We will give an error later.
5320 if (size
== 64 && target
->abiversion() < 2)
5321 ref
|= Symbol::FUNC_DESC_ABI
;
5325 // Report an unsupported relocation against a local symbol.
5327 template<int size
, bool big_endian
>
5329 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5330 Sized_relobj_file
<size
, big_endian
>* object
,
5331 unsigned int r_type
)
5333 gold_error(_("%s: unsupported reloc %u against local symbol"),
5334 object
->name().c_str(), r_type
);
5337 // We are about to emit a dynamic relocation of type R_TYPE. If the
5338 // dynamic linker does not support it, issue an error.
5340 template<int size
, bool big_endian
>
5342 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5343 unsigned int r_type
)
5345 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5347 // These are the relocation types supported by glibc for both 32-bit
5348 // and 64-bit powerpc.
5351 case elfcpp::R_POWERPC_NONE
:
5352 case elfcpp::R_POWERPC_RELATIVE
:
5353 case elfcpp::R_POWERPC_GLOB_DAT
:
5354 case elfcpp::R_POWERPC_DTPMOD
:
5355 case elfcpp::R_POWERPC_DTPREL
:
5356 case elfcpp::R_POWERPC_TPREL
:
5357 case elfcpp::R_POWERPC_JMP_SLOT
:
5358 case elfcpp::R_POWERPC_COPY
:
5359 case elfcpp::R_POWERPC_IRELATIVE
:
5360 case elfcpp::R_POWERPC_ADDR32
:
5361 case elfcpp::R_POWERPC_UADDR32
:
5362 case elfcpp::R_POWERPC_ADDR24
:
5363 case elfcpp::R_POWERPC_ADDR16
:
5364 case elfcpp::R_POWERPC_UADDR16
:
5365 case elfcpp::R_POWERPC_ADDR16_LO
:
5366 case elfcpp::R_POWERPC_ADDR16_HI
:
5367 case elfcpp::R_POWERPC_ADDR16_HA
:
5368 case elfcpp::R_POWERPC_ADDR14
:
5369 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5370 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5371 case elfcpp::R_POWERPC_REL32
:
5372 case elfcpp::R_POWERPC_REL24
:
5373 case elfcpp::R_POWERPC_TPREL16
:
5374 case elfcpp::R_POWERPC_TPREL16_LO
:
5375 case elfcpp::R_POWERPC_TPREL16_HI
:
5376 case elfcpp::R_POWERPC_TPREL16_HA
:
5387 // These are the relocation types supported only on 64-bit.
5388 case elfcpp::R_PPC64_ADDR64
:
5389 case elfcpp::R_PPC64_UADDR64
:
5390 case elfcpp::R_PPC64_JMP_IREL
:
5391 case elfcpp::R_PPC64_ADDR16_DS
:
5392 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5393 case elfcpp::R_PPC64_ADDR16_HIGH
:
5394 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5395 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5396 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5397 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5398 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5399 case elfcpp::R_PPC64_REL64
:
5400 case elfcpp::R_POWERPC_ADDR30
:
5401 case elfcpp::R_PPC64_TPREL16_DS
:
5402 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5403 case elfcpp::R_PPC64_TPREL16_HIGH
:
5404 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5405 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5406 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5407 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5408 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5419 // These are the relocation types supported only on 32-bit.
5420 // ??? glibc ld.so doesn't need to support these.
5421 case elfcpp::R_POWERPC_DTPREL16
:
5422 case elfcpp::R_POWERPC_DTPREL16_LO
:
5423 case elfcpp::R_POWERPC_DTPREL16_HI
:
5424 case elfcpp::R_POWERPC_DTPREL16_HA
:
5432 // This prevents us from issuing more than one error per reloc
5433 // section. But we can still wind up issuing more than one
5434 // error per object file.
5435 if (this->issued_non_pic_error_
)
5437 gold_assert(parameters
->options().output_is_position_independent());
5438 object
->error(_("requires unsupported dynamic reloc; "
5439 "recompile with -fPIC"));
5440 this->issued_non_pic_error_
= true;
5444 // Return whether we need to make a PLT entry for a relocation of the
5445 // given type against a STT_GNU_IFUNC symbol.
5447 template<int size
, bool big_endian
>
5449 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5450 Target_powerpc
<size
, big_endian
>* target
,
5451 Sized_relobj_file
<size
, big_endian
>* object
,
5452 unsigned int r_type
,
5455 // In non-pic code any reference will resolve to the plt call stub
5456 // for the ifunc symbol.
5457 if ((size
== 32 || target
->abiversion() >= 2)
5458 && !parameters
->options().output_is_position_independent())
5463 // Word size refs from data sections are OK, but don't need a PLT entry.
5464 case elfcpp::R_POWERPC_ADDR32
:
5465 case elfcpp::R_POWERPC_UADDR32
:
5470 case elfcpp::R_PPC64_ADDR64
:
5471 case elfcpp::R_PPC64_UADDR64
:
5476 // GOT refs are good, but also don't need a PLT entry.
5477 case elfcpp::R_POWERPC_GOT16
:
5478 case elfcpp::R_POWERPC_GOT16_LO
:
5479 case elfcpp::R_POWERPC_GOT16_HI
:
5480 case elfcpp::R_POWERPC_GOT16_HA
:
5481 case elfcpp::R_PPC64_GOT16_DS
:
5482 case elfcpp::R_PPC64_GOT16_LO_DS
:
5485 // Function calls are good, and these do need a PLT entry.
5486 case elfcpp::R_POWERPC_ADDR24
:
5487 case elfcpp::R_POWERPC_ADDR14
:
5488 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5489 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5490 case elfcpp::R_POWERPC_REL24
:
5491 case elfcpp::R_PPC_PLTREL24
:
5492 case elfcpp::R_POWERPC_REL14
:
5493 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5494 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5501 // Anything else is a problem.
5502 // If we are building a static executable, the libc startup function
5503 // responsible for applying indirect function relocations is going
5504 // to complain about the reloc type.
5505 // If we are building a dynamic executable, we will have a text
5506 // relocation. The dynamic loader will set the text segment
5507 // writable and non-executable to apply text relocations. So we'll
5508 // segfault when trying to run the indirection function to resolve
5511 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5512 object
->name().c_str(), r_type
);
5516 // Scan a relocation for a local symbol.
5518 template<int size
, bool big_endian
>
5520 Target_powerpc
<size
, big_endian
>::Scan::local(
5521 Symbol_table
* symtab
,
5523 Target_powerpc
<size
, big_endian
>* target
,
5524 Sized_relobj_file
<size
, big_endian
>* object
,
5525 unsigned int data_shndx
,
5526 Output_section
* output_section
,
5527 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5528 unsigned int r_type
,
5529 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5532 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5534 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5535 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5537 this->expect_tls_get_addr_call();
5538 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5539 if (tls_type
!= tls::TLSOPT_NONE
)
5540 this->skip_next_tls_get_addr_call();
5542 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5543 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5545 this->expect_tls_get_addr_call();
5546 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5547 if (tls_type
!= tls::TLSOPT_NONE
)
5548 this->skip_next_tls_get_addr_call();
5551 Powerpc_relobj
<size
, big_endian
>* ppc_object
5552 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5557 && data_shndx
== ppc_object
->opd_shndx()
5558 && r_type
== elfcpp::R_PPC64_ADDR64
)
5559 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5563 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5564 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5565 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5567 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5568 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5569 r_type
, r_sym
, reloc
.get_r_addend());
5570 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5575 case elfcpp::R_POWERPC_NONE
:
5576 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5577 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5578 case elfcpp::R_PPC64_TOCSAVE
:
5579 case elfcpp::R_POWERPC_TLS
:
5582 case elfcpp::R_PPC64_TOC
:
5584 Output_data_got_powerpc
<size
, big_endian
>* got
5585 = target
->got_section(symtab
, layout
);
5586 if (parameters
->options().output_is_position_independent())
5588 Address off
= reloc
.get_r_offset();
5590 && target
->abiversion() < 2
5591 && data_shndx
== ppc_object
->opd_shndx()
5592 && ppc_object
->get_opd_discard(off
- 8))
5595 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5596 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5597 rela_dyn
->add_output_section_relative(got
->output_section(),
5598 elfcpp::R_POWERPC_RELATIVE
,
5600 object
, data_shndx
, off
,
5601 symobj
->toc_base_offset());
5606 case elfcpp::R_PPC64_ADDR64
:
5607 case elfcpp::R_PPC64_UADDR64
:
5608 case elfcpp::R_POWERPC_ADDR32
:
5609 case elfcpp::R_POWERPC_UADDR32
:
5610 case elfcpp::R_POWERPC_ADDR24
:
5611 case elfcpp::R_POWERPC_ADDR16
:
5612 case elfcpp::R_POWERPC_ADDR16_LO
:
5613 case elfcpp::R_POWERPC_ADDR16_HI
:
5614 case elfcpp::R_POWERPC_ADDR16_HA
:
5615 case elfcpp::R_POWERPC_UADDR16
:
5616 case elfcpp::R_PPC64_ADDR16_HIGH
:
5617 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5618 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5619 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5620 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5621 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5622 case elfcpp::R_PPC64_ADDR16_DS
:
5623 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5624 case elfcpp::R_POWERPC_ADDR14
:
5625 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5626 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5627 // If building a shared library (or a position-independent
5628 // executable), we need to create a dynamic relocation for
5630 if (parameters
->options().output_is_position_independent()
5631 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5633 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5635 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5636 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5637 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5639 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5640 : elfcpp::R_POWERPC_RELATIVE
);
5641 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5642 output_section
, data_shndx
,
5643 reloc
.get_r_offset(),
5644 reloc
.get_r_addend(), false);
5646 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5648 check_non_pic(object
, r_type
);
5649 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5650 data_shndx
, reloc
.get_r_offset(),
5651 reloc
.get_r_addend());
5655 gold_assert(lsym
.get_st_value() == 0);
5656 unsigned int shndx
= lsym
.get_st_shndx();
5658 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5661 object
->error(_("section symbol %u has bad shndx %u"),
5664 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5665 output_section
, data_shndx
,
5666 reloc
.get_r_offset());
5671 case elfcpp::R_POWERPC_REL24
:
5672 case elfcpp::R_PPC_PLTREL24
:
5673 case elfcpp::R_PPC_LOCAL24PC
:
5674 case elfcpp::R_POWERPC_REL14
:
5675 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5676 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5678 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5679 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5680 reloc
.get_r_addend());
5683 case elfcpp::R_PPC64_REL64
:
5684 case elfcpp::R_POWERPC_REL32
:
5685 case elfcpp::R_POWERPC_REL16
:
5686 case elfcpp::R_POWERPC_REL16_LO
:
5687 case elfcpp::R_POWERPC_REL16_HI
:
5688 case elfcpp::R_POWERPC_REL16_HA
:
5689 case elfcpp::R_POWERPC_SECTOFF
:
5690 case elfcpp::R_POWERPC_SECTOFF_LO
:
5691 case elfcpp::R_POWERPC_SECTOFF_HI
:
5692 case elfcpp::R_POWERPC_SECTOFF_HA
:
5693 case elfcpp::R_PPC64_SECTOFF_DS
:
5694 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5695 case elfcpp::R_POWERPC_TPREL16
:
5696 case elfcpp::R_POWERPC_TPREL16_LO
:
5697 case elfcpp::R_POWERPC_TPREL16_HI
:
5698 case elfcpp::R_POWERPC_TPREL16_HA
:
5699 case elfcpp::R_PPC64_TPREL16_DS
:
5700 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5701 case elfcpp::R_PPC64_TPREL16_HIGH
:
5702 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5703 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5704 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5705 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5706 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5707 case elfcpp::R_POWERPC_DTPREL16
:
5708 case elfcpp::R_POWERPC_DTPREL16_LO
:
5709 case elfcpp::R_POWERPC_DTPREL16_HI
:
5710 case elfcpp::R_POWERPC_DTPREL16_HA
:
5711 case elfcpp::R_PPC64_DTPREL16_DS
:
5712 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5713 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5714 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5715 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5716 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5717 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5718 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5719 case elfcpp::R_PPC64_TLSGD
:
5720 case elfcpp::R_PPC64_TLSLD
:
5721 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5724 case elfcpp::R_POWERPC_GOT16
:
5725 case elfcpp::R_POWERPC_GOT16_LO
:
5726 case elfcpp::R_POWERPC_GOT16_HI
:
5727 case elfcpp::R_POWERPC_GOT16_HA
:
5728 case elfcpp::R_PPC64_GOT16_DS
:
5729 case elfcpp::R_PPC64_GOT16_LO_DS
:
5731 // The symbol requires a GOT entry.
5732 Output_data_got_powerpc
<size
, big_endian
>* got
5733 = target
->got_section(symtab
, layout
);
5734 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5736 if (!parameters
->options().output_is_position_independent())
5739 && (size
== 32 || target
->abiversion() >= 2))
5740 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5742 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5744 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5746 // If we are generating a shared object or a pie, this
5747 // symbol's GOT entry will be set by a dynamic relocation.
5749 off
= got
->add_constant(0);
5750 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5752 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5754 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5755 : elfcpp::R_POWERPC_RELATIVE
);
5756 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5757 got
, off
, 0, false);
5762 case elfcpp::R_PPC64_TOC16
:
5763 case elfcpp::R_PPC64_TOC16_LO
:
5764 case elfcpp::R_PPC64_TOC16_HI
:
5765 case elfcpp::R_PPC64_TOC16_HA
:
5766 case elfcpp::R_PPC64_TOC16_DS
:
5767 case elfcpp::R_PPC64_TOC16_LO_DS
:
5768 // We need a GOT section.
5769 target
->got_section(symtab
, layout
);
5772 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5773 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5774 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5775 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5777 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5778 if (tls_type
== tls::TLSOPT_NONE
)
5780 Output_data_got_powerpc
<size
, big_endian
>* got
5781 = target
->got_section(symtab
, layout
);
5782 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5783 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5784 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5785 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5787 else if (tls_type
== tls::TLSOPT_TO_LE
)
5789 // no GOT relocs needed for Local Exec.
5796 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5797 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5798 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5799 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5801 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5802 if (tls_type
== tls::TLSOPT_NONE
)
5803 target
->tlsld_got_offset(symtab
, layout
, object
);
5804 else if (tls_type
== tls::TLSOPT_TO_LE
)
5806 // no GOT relocs needed for Local Exec.
5807 if (parameters
->options().emit_relocs())
5809 Output_section
* os
= layout
->tls_segment()->first_section();
5810 gold_assert(os
!= NULL
);
5811 os
->set_needs_symtab_index();
5819 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5820 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5821 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5822 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5824 Output_data_got_powerpc
<size
, big_endian
>* got
5825 = target
->got_section(symtab
, layout
);
5826 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5827 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5831 case elfcpp::R_POWERPC_GOT_TPREL16
:
5832 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5833 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5834 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5836 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5837 if (tls_type
== tls::TLSOPT_NONE
)
5839 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5840 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5842 Output_data_got_powerpc
<size
, big_endian
>* got
5843 = target
->got_section(symtab
, layout
);
5844 unsigned int off
= got
->add_constant(0);
5845 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5847 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5848 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5849 elfcpp::R_POWERPC_TPREL
,
5853 else if (tls_type
== tls::TLSOPT_TO_LE
)
5855 // no GOT relocs needed for Local Exec.
5863 unsupported_reloc_local(object
, r_type
);
5869 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5870 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5871 case elfcpp::R_POWERPC_GOT_TPREL16
:
5872 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5873 case elfcpp::R_POWERPC_GOT16
:
5874 case elfcpp::R_PPC64_GOT16_DS
:
5875 case elfcpp::R_PPC64_TOC16
:
5876 case elfcpp::R_PPC64_TOC16_DS
:
5877 ppc_object
->set_has_small_toc_reloc();
5883 // Report an unsupported relocation against a global symbol.
5885 template<int size
, bool big_endian
>
5887 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5888 Sized_relobj_file
<size
, big_endian
>* object
,
5889 unsigned int r_type
,
5892 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5893 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5896 // Scan a relocation for a global symbol.
5898 template<int size
, bool big_endian
>
5900 Target_powerpc
<size
, big_endian
>::Scan::global(
5901 Symbol_table
* symtab
,
5903 Target_powerpc
<size
, big_endian
>* target
,
5904 Sized_relobj_file
<size
, big_endian
>* object
,
5905 unsigned int data_shndx
,
5906 Output_section
* output_section
,
5907 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5908 unsigned int r_type
,
5911 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5914 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5915 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5917 this->expect_tls_get_addr_call();
5918 const bool final
= gsym
->final_value_is_known();
5919 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5920 if (tls_type
!= tls::TLSOPT_NONE
)
5921 this->skip_next_tls_get_addr_call();
5923 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5924 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5926 this->expect_tls_get_addr_call();
5927 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5928 if (tls_type
!= tls::TLSOPT_NONE
)
5929 this->skip_next_tls_get_addr_call();
5932 Powerpc_relobj
<size
, big_endian
>* ppc_object
5933 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5935 // A STT_GNU_IFUNC symbol may require a PLT entry.
5936 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5937 bool pushed_ifunc
= false;
5938 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5940 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5941 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5942 reloc
.get_r_addend());
5943 target
->make_plt_entry(symtab
, layout
, gsym
);
5944 pushed_ifunc
= true;
5949 case elfcpp::R_POWERPC_NONE
:
5950 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5951 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5952 case elfcpp::R_PPC_LOCAL24PC
:
5953 case elfcpp::R_POWERPC_TLS
:
5956 case elfcpp::R_PPC64_TOC
:
5958 Output_data_got_powerpc
<size
, big_endian
>* got
5959 = target
->got_section(symtab
, layout
);
5960 if (parameters
->options().output_is_position_independent())
5962 Address off
= reloc
.get_r_offset();
5964 && data_shndx
== ppc_object
->opd_shndx()
5965 && ppc_object
->get_opd_discard(off
- 8))
5968 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5969 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5970 if (data_shndx
!= ppc_object
->opd_shndx())
5971 symobj
= static_cast
5972 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5973 rela_dyn
->add_output_section_relative(got
->output_section(),
5974 elfcpp::R_POWERPC_RELATIVE
,
5976 object
, data_shndx
, off
,
5977 symobj
->toc_base_offset());
5982 case elfcpp::R_PPC64_ADDR64
:
5984 && target
->abiversion() < 2
5985 && data_shndx
== ppc_object
->opd_shndx()
5986 && (gsym
->is_defined_in_discarded_section()
5987 || gsym
->object() != object
))
5989 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5993 case elfcpp::R_PPC64_UADDR64
:
5994 case elfcpp::R_POWERPC_ADDR32
:
5995 case elfcpp::R_POWERPC_UADDR32
:
5996 case elfcpp::R_POWERPC_ADDR24
:
5997 case elfcpp::R_POWERPC_ADDR16
:
5998 case elfcpp::R_POWERPC_ADDR16_LO
:
5999 case elfcpp::R_POWERPC_ADDR16_HI
:
6000 case elfcpp::R_POWERPC_ADDR16_HA
:
6001 case elfcpp::R_POWERPC_UADDR16
:
6002 case elfcpp::R_PPC64_ADDR16_HIGH
:
6003 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6004 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6005 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6006 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6007 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6008 case elfcpp::R_PPC64_ADDR16_DS
:
6009 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6010 case elfcpp::R_POWERPC_ADDR14
:
6011 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6012 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6014 // Make a PLT entry if necessary.
6015 if (gsym
->needs_plt_entry())
6017 // Since this is not a PC-relative relocation, we may be
6018 // taking the address of a function. In that case we need to
6019 // set the entry in the dynamic symbol table to the address of
6020 // the PLT call stub.
6021 bool need_ifunc_plt
= false;
6022 if ((size
== 32 || target
->abiversion() >= 2)
6023 && gsym
->is_from_dynobj()
6024 && !parameters
->options().output_is_position_independent())
6026 gsym
->set_needs_dynsym_value();
6027 need_ifunc_plt
= true;
6029 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6031 target
->push_branch(ppc_object
, data_shndx
,
6032 reloc
.get_r_offset(), r_type
,
6033 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6034 reloc
.get_r_addend());
6035 target
->make_plt_entry(symtab
, layout
, gsym
);
6038 // Make a dynamic relocation if necessary.
6039 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6040 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6042 if (!parameters
->options().output_is_position_independent()
6043 && gsym
->may_need_copy_reloc())
6045 target
->copy_reloc(symtab
, layout
, object
,
6046 data_shndx
, output_section
, gsym
, reloc
);
6048 else if ((((size
== 32
6049 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6051 && r_type
== elfcpp::R_PPC64_ADDR64
6052 && target
->abiversion() >= 2))
6053 && gsym
->can_use_relative_reloc(false)
6054 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6055 && parameters
->options().shared()))
6057 && r_type
== elfcpp::R_PPC64_ADDR64
6058 && target
->abiversion() < 2
6059 && (gsym
->can_use_relative_reloc(false)
6060 || data_shndx
== ppc_object
->opd_shndx())))
6062 Reloc_section
* rela_dyn
6063 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6064 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6065 : elfcpp::R_POWERPC_RELATIVE
);
6066 rela_dyn
->add_symbolless_global_addend(
6067 gsym
, dynrel
, output_section
, object
, data_shndx
,
6068 reloc
.get_r_offset(), reloc
.get_r_addend());
6072 Reloc_section
* rela_dyn
6073 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6074 check_non_pic(object
, r_type
);
6075 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6077 reloc
.get_r_offset(),
6078 reloc
.get_r_addend());
6084 case elfcpp::R_PPC_PLTREL24
:
6085 case elfcpp::R_POWERPC_REL24
:
6088 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6090 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6091 reloc
.get_r_addend());
6092 if (gsym
->needs_plt_entry()
6093 || (!gsym
->final_value_is_known()
6094 && (gsym
->is_undefined()
6095 || gsym
->is_from_dynobj()
6096 || gsym
->is_preemptible())))
6097 target
->make_plt_entry(symtab
, layout
, gsym
);
6101 case elfcpp::R_PPC64_REL64
:
6102 case elfcpp::R_POWERPC_REL32
:
6103 // Make a dynamic relocation if necessary.
6104 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6106 if (!parameters
->options().output_is_position_independent()
6107 && gsym
->may_need_copy_reloc())
6109 target
->copy_reloc(symtab
, layout
, object
,
6110 data_shndx
, output_section
, gsym
,
6115 Reloc_section
* rela_dyn
6116 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6117 check_non_pic(object
, r_type
);
6118 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6119 data_shndx
, reloc
.get_r_offset(),
6120 reloc
.get_r_addend());
6125 case elfcpp::R_POWERPC_REL14
:
6126 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6127 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6129 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6130 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6131 reloc
.get_r_addend());
6134 case elfcpp::R_POWERPC_REL16
:
6135 case elfcpp::R_POWERPC_REL16_LO
:
6136 case elfcpp::R_POWERPC_REL16_HI
:
6137 case elfcpp::R_POWERPC_REL16_HA
:
6138 case elfcpp::R_POWERPC_SECTOFF
:
6139 case elfcpp::R_POWERPC_SECTOFF_LO
:
6140 case elfcpp::R_POWERPC_SECTOFF_HI
:
6141 case elfcpp::R_POWERPC_SECTOFF_HA
:
6142 case elfcpp::R_PPC64_SECTOFF_DS
:
6143 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6144 case elfcpp::R_POWERPC_TPREL16
:
6145 case elfcpp::R_POWERPC_TPREL16_LO
:
6146 case elfcpp::R_POWERPC_TPREL16_HI
:
6147 case elfcpp::R_POWERPC_TPREL16_HA
:
6148 case elfcpp::R_PPC64_TPREL16_DS
:
6149 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6150 case elfcpp::R_PPC64_TPREL16_HIGH
:
6151 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6152 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6153 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6154 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6155 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6156 case elfcpp::R_POWERPC_DTPREL16
:
6157 case elfcpp::R_POWERPC_DTPREL16_LO
:
6158 case elfcpp::R_POWERPC_DTPREL16_HI
:
6159 case elfcpp::R_POWERPC_DTPREL16_HA
:
6160 case elfcpp::R_PPC64_DTPREL16_DS
:
6161 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6162 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6163 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6164 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6165 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6166 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6167 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6168 case elfcpp::R_PPC64_TLSGD
:
6169 case elfcpp::R_PPC64_TLSLD
:
6170 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6173 case elfcpp::R_POWERPC_GOT16
:
6174 case elfcpp::R_POWERPC_GOT16_LO
:
6175 case elfcpp::R_POWERPC_GOT16_HI
:
6176 case elfcpp::R_POWERPC_GOT16_HA
:
6177 case elfcpp::R_PPC64_GOT16_DS
:
6178 case elfcpp::R_PPC64_GOT16_LO_DS
:
6180 // The symbol requires a GOT entry.
6181 Output_data_got_powerpc
<size
, big_endian
>* got
;
6183 got
= target
->got_section(symtab
, layout
);
6184 if (gsym
->final_value_is_known())
6187 && (size
== 32 || target
->abiversion() >= 2))
6188 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6190 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6192 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6194 // If we are generating a shared object or a pie, this
6195 // symbol's GOT entry will be set by a dynamic relocation.
6196 unsigned int off
= got
->add_constant(0);
6197 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6199 Reloc_section
* rela_dyn
6200 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6202 if (gsym
->can_use_relative_reloc(false)
6204 || target
->abiversion() >= 2)
6205 && gsym
->visibility() == elfcpp::STV_PROTECTED
6206 && parameters
->options().shared()))
6208 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6209 : elfcpp::R_POWERPC_RELATIVE
);
6210 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6214 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6215 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6221 case elfcpp::R_PPC64_TOC16
:
6222 case elfcpp::R_PPC64_TOC16_LO
:
6223 case elfcpp::R_PPC64_TOC16_HI
:
6224 case elfcpp::R_PPC64_TOC16_HA
:
6225 case elfcpp::R_PPC64_TOC16_DS
:
6226 case elfcpp::R_PPC64_TOC16_LO_DS
:
6227 // We need a GOT section.
6228 target
->got_section(symtab
, layout
);
6231 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6232 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6233 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6234 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6236 const bool final
= gsym
->final_value_is_known();
6237 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6238 if (tls_type
== tls::TLSOPT_NONE
)
6240 Output_data_got_powerpc
<size
, big_endian
>* got
6241 = target
->got_section(symtab
, layout
);
6242 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6243 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6244 elfcpp::R_POWERPC_DTPMOD
,
6245 elfcpp::R_POWERPC_DTPREL
);
6247 else if (tls_type
== tls::TLSOPT_TO_IE
)
6249 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6251 Output_data_got_powerpc
<size
, big_endian
>* got
6252 = target
->got_section(symtab
, layout
);
6253 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6254 if (gsym
->is_undefined()
6255 || gsym
->is_from_dynobj())
6257 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6258 elfcpp::R_POWERPC_TPREL
);
6262 unsigned int off
= got
->add_constant(0);
6263 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6264 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6265 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6270 else if (tls_type
== tls::TLSOPT_TO_LE
)
6272 // no GOT relocs needed for Local Exec.
6279 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6280 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6281 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6282 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6284 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6285 if (tls_type
== tls::TLSOPT_NONE
)
6286 target
->tlsld_got_offset(symtab
, layout
, object
);
6287 else if (tls_type
== tls::TLSOPT_TO_LE
)
6289 // no GOT relocs needed for Local Exec.
6290 if (parameters
->options().emit_relocs())
6292 Output_section
* os
= layout
->tls_segment()->first_section();
6293 gold_assert(os
!= NULL
);
6294 os
->set_needs_symtab_index();
6302 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6303 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6304 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6305 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6307 Output_data_got_powerpc
<size
, big_endian
>* got
6308 = target
->got_section(symtab
, layout
);
6309 if (!gsym
->final_value_is_known()
6310 && (gsym
->is_from_dynobj()
6311 || gsym
->is_undefined()
6312 || gsym
->is_preemptible()))
6313 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6314 target
->rela_dyn_section(layout
),
6315 elfcpp::R_POWERPC_DTPREL
);
6317 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6321 case elfcpp::R_POWERPC_GOT_TPREL16
:
6322 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6323 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6324 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6326 const bool final
= gsym
->final_value_is_known();
6327 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6328 if (tls_type
== tls::TLSOPT_NONE
)
6330 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6332 Output_data_got_powerpc
<size
, big_endian
>* got
6333 = target
->got_section(symtab
, layout
);
6334 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6335 if (gsym
->is_undefined()
6336 || gsym
->is_from_dynobj())
6338 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6339 elfcpp::R_POWERPC_TPREL
);
6343 unsigned int off
= got
->add_constant(0);
6344 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6345 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6346 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6351 else if (tls_type
== tls::TLSOPT_TO_LE
)
6353 // no GOT relocs needed for Local Exec.
6361 unsupported_reloc_global(object
, r_type
, gsym
);
6367 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6368 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6369 case elfcpp::R_POWERPC_GOT_TPREL16
:
6370 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6371 case elfcpp::R_POWERPC_GOT16
:
6372 case elfcpp::R_PPC64_GOT16_DS
:
6373 case elfcpp::R_PPC64_TOC16
:
6374 case elfcpp::R_PPC64_TOC16_DS
:
6375 ppc_object
->set_has_small_toc_reloc();
6381 // Process relocations for gc.
6383 template<int size
, bool big_endian
>
6385 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6386 Symbol_table
* symtab
,
6388 Sized_relobj_file
<size
, big_endian
>* object
,
6389 unsigned int data_shndx
,
6391 const unsigned char* prelocs
,
6393 Output_section
* output_section
,
6394 bool needs_special_offset_handling
,
6395 size_t local_symbol_count
,
6396 const unsigned char* plocal_symbols
)
6398 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6399 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6400 Powerpc_relobj
<size
, big_endian
>* ppc_object
6401 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6403 ppc_object
->set_opd_valid();
6404 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6406 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6407 for (p
= ppc_object
->access_from_map()->begin();
6408 p
!= ppc_object
->access_from_map()->end();
6411 Address dst_off
= p
->first
;
6412 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6413 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6414 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6416 Relobj
* src_obj
= s
->first
;
6417 unsigned int src_indx
= s
->second
;
6418 symtab
->gc()->add_reference(src_obj
, src_indx
,
6419 ppc_object
, dst_indx
);
6423 ppc_object
->access_from_map()->clear();
6424 ppc_object
->process_gc_mark(symtab
);
6425 // Don't look at .opd relocs as .opd will reference everything.
6429 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
6430 typename
Target_powerpc::Relocatable_size_for_reloc
>(
6439 needs_special_offset_handling
,
6444 // Handle target specific gc actions when adding a gc reference from
6445 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6446 // and DST_OFF. For powerpc64, this adds a referenc to the code
6447 // section of a function descriptor.
6449 template<int size
, bool big_endian
>
6451 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6452 Symbol_table
* symtab
,
6454 unsigned int src_shndx
,
6456 unsigned int dst_shndx
,
6457 Address dst_off
) const
6459 if (size
!= 64 || dst_obj
->is_dynamic())
6462 Powerpc_relobj
<size
, big_endian
>* ppc_object
6463 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6464 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6466 if (ppc_object
->opd_valid())
6468 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6469 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6473 // If we haven't run scan_opd_relocs, we must delay
6474 // processing this function descriptor reference.
6475 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6480 // Add any special sections for this symbol to the gc work list.
6481 // For powerpc64, this adds the code section of a function
6484 template<int size
, bool big_endian
>
6486 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6487 Symbol_table
* symtab
,
6492 Powerpc_relobj
<size
, big_endian
>* ppc_object
6493 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6495 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6496 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6498 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6499 Address dst_off
= gsym
->value();
6500 if (ppc_object
->opd_valid())
6502 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6503 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
6507 ppc_object
->add_gc_mark(dst_off
);
6512 // For a symbol location in .opd, set LOC to the location of the
6515 template<int size
, bool big_endian
>
6517 Target_powerpc
<size
, big_endian
>::do_function_location(
6518 Symbol_location
* loc
) const
6520 if (size
== 64 && loc
->shndx
!= 0)
6522 if (loc
->object
->is_dynamic())
6524 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6525 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6526 if (loc
->shndx
== ppc_object
->opd_shndx())
6529 Address off
= loc
->offset
- ppc_object
->opd_address();
6530 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6531 loc
->offset
= dest_off
;
6536 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6537 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6538 if (loc
->shndx
== ppc_object
->opd_shndx())
6541 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6542 loc
->offset
= dest_off
;
6548 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6549 // compiled with -fsplit-stack. The function calls non-split-stack
6550 // code. Change the function to ensure it has enough stack space to
6551 // call some random function.
6553 template<int size
, bool big_endian
>
6555 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
6558 section_offset_type fnoffset
,
6559 section_size_type fnsize
,
6560 unsigned char* view
,
6561 section_size_type view_size
,
6563 std::string
* to
) const
6565 // 32-bit not supported.
6569 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
6570 view
, view_size
, from
, to
);
6574 // The function always starts with
6575 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6576 // addis %r12,%r1,-allocate@ha
6577 // addi %r12,%r12,-allocate@l
6579 // but note that the addis or addi may be replaced with a nop
6581 unsigned char *entry
= view
+ fnoffset
;
6582 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6584 if ((insn
& 0xffff0000) == addis_2_12
)
6586 /* Skip ELFv2 global entry code. */
6588 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6591 unsigned char *pinsn
= entry
;
6593 const uint32_t ld_private_ss
= 0xe80d8fc0;
6594 if (insn
== ld_private_ss
)
6596 int32_t allocate
= 0;
6600 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
6601 if ((insn
& 0xffff0000) == addis_12_1
)
6602 allocate
+= (insn
& 0xffff) << 16;
6603 else if ((insn
& 0xffff0000) == addi_12_1
6604 || (insn
& 0xffff0000) == addi_12_12
)
6605 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
6606 else if (insn
!= nop
)
6609 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
6611 int extra
= parameters
->options().split_stack_adjust_size();
6613 if (allocate
>= 0 || extra
< 0)
6615 object
->error(_("split-stack stack size overflow at "
6616 "section %u offset %0zx"),
6617 shndx
, static_cast<size_t>(fnoffset
));
6621 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
6622 if (insn
!= addis_12_1
)
6624 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6626 insn
= addi_12_12
| (allocate
& 0xffff);
6627 if (insn
!= addi_12_12
)
6629 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6635 insn
= addi_12_1
| (allocate
& 0xffff);
6636 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6639 if (pinsn
!= entry
+ 12)
6640 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
6648 if (!object
->has_no_split_stack())
6649 object
->error(_("failed to match split-stack sequence at "
6650 "section %u offset %0zx"),
6651 shndx
, static_cast<size_t>(fnoffset
));
6655 // Scan relocations for a section.
6657 template<int size
, bool big_endian
>
6659 Target_powerpc
<size
, big_endian
>::scan_relocs(
6660 Symbol_table
* symtab
,
6662 Sized_relobj_file
<size
, big_endian
>* object
,
6663 unsigned int data_shndx
,
6664 unsigned int sh_type
,
6665 const unsigned char* prelocs
,
6667 Output_section
* output_section
,
6668 bool needs_special_offset_handling
,
6669 size_t local_symbol_count
,
6670 const unsigned char* plocal_symbols
)
6672 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6673 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6675 if (sh_type
== elfcpp::SHT_REL
)
6677 gold_error(_("%s: unsupported REL reloc section"),
6678 object
->name().c_str());
6682 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
6691 needs_special_offset_handling
,
6696 // Functor class for processing the global symbol table.
6697 // Removes symbols defined on discarded opd entries.
6699 template<bool big_endian
>
6700 class Global_symbol_visitor_opd
6703 Global_symbol_visitor_opd()
6707 operator()(Sized_symbol
<64>* sym
)
6709 if (sym
->has_symtab_index()
6710 || sym
->source() != Symbol::FROM_OBJECT
6711 || !sym
->in_real_elf())
6714 if (sym
->object()->is_dynamic())
6717 Powerpc_relobj
<64, big_endian
>* symobj
6718 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6719 if (symobj
->opd_shndx() == 0)
6723 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6724 if (shndx
== symobj
->opd_shndx()
6725 && symobj
->get_opd_discard(sym
->value()))
6727 sym
->set_undefined();
6728 sym
->set_visibility(elfcpp::STV_DEFAULT
);
6729 sym
->set_is_defined_in_discarded_section();
6730 sym
->set_symtab_index(-1U);
6735 template<int size
, bool big_endian
>
6737 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6739 Symbol_table
* symtab
)
6743 Output_data_save_res
<size
, big_endian
>* savres
6744 = new Output_data_save_res
<size
, big_endian
>(symtab
);
6745 this->savres_section_
= savres
;
6746 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6747 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6748 savres
, ORDER_TEXT
, false);
6752 // Sort linker created .got section first (for the header), then input
6753 // sections belonging to files using small model code.
6755 template<bool big_endian
>
6756 class Sort_toc_sections
6760 operator()(const Output_section::Input_section
& is1
,
6761 const Output_section::Input_section
& is2
) const
6763 if (!is1
.is_input_section() && is2
.is_input_section())
6766 = (is1
.is_input_section()
6767 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6768 ->has_small_toc_reloc()));
6770 = (is2
.is_input_section()
6771 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6772 ->has_small_toc_reloc()));
6773 return small1
&& !small2
;
6777 // Finalize the sections.
6779 template<int size
, bool big_endian
>
6781 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6783 const Input_objects
*,
6784 Symbol_table
* symtab
)
6786 if (parameters
->doing_static_link())
6788 // At least some versions of glibc elf-init.o have a strong
6789 // reference to __rela_iplt marker syms. A weak ref would be
6791 if (this->iplt_
!= NULL
)
6793 Reloc_section
* rel
= this->iplt_
->rel_plt();
6794 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6795 Symbol_table::PREDEFINED
, rel
, 0, 0,
6796 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6797 elfcpp::STV_HIDDEN
, 0, false, true);
6798 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6799 Symbol_table::PREDEFINED
, rel
, 0, 0,
6800 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6801 elfcpp::STV_HIDDEN
, 0, true, true);
6805 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6806 Symbol_table::PREDEFINED
, 0, 0,
6807 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6808 elfcpp::STV_HIDDEN
, 0, true, false);
6809 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6810 Symbol_table::PREDEFINED
, 0, 0,
6811 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6812 elfcpp::STV_HIDDEN
, 0, true, false);
6818 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6819 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6821 if (!parameters
->options().relocatable())
6823 this->define_save_restore_funcs(layout
, symtab
);
6825 // Annoyingly, we need to make these sections now whether or
6826 // not we need them. If we delay until do_relax then we
6827 // need to mess with the relaxation machinery checkpointing.
6828 this->got_section(symtab
, layout
);
6829 this->make_brlt_section(layout
);
6831 if (parameters
->options().toc_sort())
6833 Output_section
* os
= this->got_
->output_section();
6834 if (os
!= NULL
&& os
->input_sections().size() > 1)
6835 std::stable_sort(os
->input_sections().begin(),
6836 os
->input_sections().end(),
6837 Sort_toc_sections
<big_endian
>());
6842 // Fill in some more dynamic tags.
6843 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6846 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6848 : this->plt_
->rel_plt());
6849 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6850 this->rela_dyn_
, true, size
== 32);
6854 if (this->got_
!= NULL
)
6856 this->got_
->finalize_data_size();
6857 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6858 this->got_
, this->got_
->g_o_t());
6863 if (this->glink_
!= NULL
)
6865 this->glink_
->finalize_data_size();
6866 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6868 (this->glink_
->pltresolve_size
6874 // Emit any relocs we saved in an attempt to avoid generating COPY
6876 if (this->copy_relocs_
.any_saved_relocs())
6877 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6880 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6884 ok_lo_toc_insn(uint32_t insn
)
6886 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6887 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6888 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6889 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6890 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6891 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6892 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6893 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6894 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6895 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6896 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6897 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6898 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6899 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6900 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6902 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6903 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6904 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6907 // Return the value to use for a branch relocation.
6909 template<int size
, bool big_endian
>
6911 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6912 const Symbol_table
* symtab
,
6913 const Sized_symbol
<size
>* gsym
,
6914 Powerpc_relobj
<size
, big_endian
>* object
,
6916 unsigned int *dest_shndx
)
6918 if (size
== 32 || this->abiversion() >= 2)
6922 // If the symbol is defined in an opd section, ie. is a function
6923 // descriptor, use the function descriptor code entry address
6924 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6926 && gsym
->source() != Symbol::FROM_OBJECT
)
6929 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6930 unsigned int shndx
= symobj
->opd_shndx();
6933 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6934 if (opd_addr
== invalid_address
)
6936 opd_addr
+= symobj
->output_section_address(shndx
);
6937 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
6940 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
6941 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6944 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6945 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6946 *dest_shndx
= folded
.second
;
6948 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6949 if (sec_addr
== invalid_address
)
6952 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6953 *value
= sec_addr
+ sec_off
;
6958 // Perform a relocation.
6960 template<int size
, bool big_endian
>
6962 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6963 const Relocate_info
<size
, big_endian
>* relinfo
,
6964 Target_powerpc
* target
,
6967 const elfcpp::Rela
<size
, big_endian
>& rela
,
6968 unsigned int r_type
,
6969 const Sized_symbol
<size
>* gsym
,
6970 const Symbol_value
<size
>* psymval
,
6971 unsigned char* view
,
6973 section_size_type view_size
)
6978 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6980 case Track_tls::NOT_EXPECTED
:
6981 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6982 _("__tls_get_addr call lacks marker reloc"));
6984 case Track_tls::EXPECTED
:
6985 // We have already complained.
6987 case Track_tls::SKIP
:
6989 case Track_tls::NORMAL
:
6993 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6994 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6995 Powerpc_relobj
<size
, big_endian
>* const object
6996 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6998 bool has_stub_value
= false;
6999 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7001 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7002 : object
->local_has_plt_offset(r_sym
))
7003 && (!psymval
->is_ifunc_symbol()
7004 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7008 && target
->abiversion() >= 2
7009 && !parameters
->options().output_is_position_independent()
7010 && !is_branch_reloc(r_type
))
7012 Address off
= target
->glink_section()->find_global_entry(gsym
);
7013 if (off
!= invalid_address
)
7015 value
= target
->glink_section()->global_entry_address() + off
;
7016 has_stub_value
= true;
7021 Stub_table
<size
, big_endian
>* stub_table
7022 = object
->stub_table(relinfo
->data_shndx
);
7023 if (stub_table
== NULL
)
7025 // This is a ref from a data section to an ifunc symbol.
7026 if (target
->stub_tables().size() != 0)
7027 stub_table
= target
->stub_tables()[0];
7029 if (stub_table
!= NULL
)
7033 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7034 rela
.get_r_addend());
7036 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7037 rela
.get_r_addend());
7038 if (off
!= invalid_address
)
7040 value
= stub_table
->stub_address() + off
;
7041 has_stub_value
= true;
7045 // We don't care too much about bogus debug references to
7046 // non-local functions, but otherwise there had better be a plt
7047 // call stub or global entry stub as appropriate.
7048 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7051 if (r_type
== elfcpp::R_POWERPC_GOT16
7052 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7053 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7054 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7055 || r_type
== elfcpp::R_PPC64_GOT16_DS
7056 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7060 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7061 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7065 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7066 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7067 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7069 value
-= target
->got_section()->got_base_offset(object
);
7071 else if (r_type
== elfcpp::R_PPC64_TOC
)
7073 value
= (target
->got_section()->output_section()->address()
7074 + object
->toc_base_offset());
7076 else if (gsym
!= NULL
7077 && (r_type
== elfcpp::R_POWERPC_REL24
7078 || r_type
== elfcpp::R_PPC_PLTREL24
)
7083 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7084 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7085 bool can_plt_call
= false;
7086 if (rela
.get_r_offset() + 8 <= view_size
)
7088 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7089 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7092 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7094 elfcpp::Swap
<32, big_endian
>::
7095 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7096 can_plt_call
= true;
7101 // If we don't have a branch and link followed by a nop,
7102 // we can't go via the plt because there is no place to
7103 // put a toc restoring instruction.
7104 // Unless we know we won't be returning.
7105 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7106 can_plt_call
= true;
7110 // g++ as of 20130507 emits self-calls without a
7111 // following nop. This is arguably wrong since we have
7112 // conflicting information. On the one hand a global
7113 // symbol and on the other a local call sequence, but
7114 // don't error for this special case.
7115 // It isn't possible to cheaply verify we have exactly
7116 // such a call. Allow all calls to the same section.
7118 Address code
= value
;
7119 if (gsym
->source() == Symbol::FROM_OBJECT
7120 && gsym
->object() == object
)
7122 unsigned int dest_shndx
= 0;
7123 if (target
->abiversion() < 2)
7125 Address addend
= rela
.get_r_addend();
7126 code
= psymval
->value(object
, addend
);
7127 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7128 &code
, &dest_shndx
);
7131 if (dest_shndx
== 0)
7132 dest_shndx
= gsym
->shndx(&is_ordinary
);
7133 ok
= dest_shndx
== relinfo
->data_shndx
;
7137 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7138 _("call lacks nop, can't restore toc; "
7139 "recompile with -fPIC"));
7145 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7146 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7147 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7148 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7150 // First instruction of a global dynamic sequence, arg setup insn.
7151 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7152 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7153 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7154 if (tls_type
== tls::TLSOPT_NONE
)
7155 got_type
= GOT_TYPE_TLSGD
;
7156 else if (tls_type
== tls::TLSOPT_TO_IE
)
7157 got_type
= GOT_TYPE_TPREL
;
7158 if (got_type
!= GOT_TYPE_STANDARD
)
7162 gold_assert(gsym
->has_got_offset(got_type
));
7163 value
= gsym
->got_offset(got_type
);
7167 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7168 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7169 value
= object
->local_got_offset(r_sym
, got_type
);
7171 value
-= target
->got_section()->got_base_offset(object
);
7173 if (tls_type
== tls::TLSOPT_TO_IE
)
7175 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7176 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7178 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7179 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7180 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7182 insn
|= 32 << 26; // lwz
7184 insn
|= 58 << 26; // ld
7185 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7187 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7188 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7190 else if (tls_type
== tls::TLSOPT_TO_LE
)
7192 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7193 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7195 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7196 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7197 insn
&= (1 << 26) - (1 << 21); // extract rt
7202 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7203 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7204 value
= psymval
->value(object
, rela
.get_r_addend());
7208 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7210 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7211 r_type
= elfcpp::R_POWERPC_NONE
;
7215 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7216 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7217 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7218 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7220 // First instruction of a local dynamic sequence, arg setup insn.
7221 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7222 if (tls_type
== tls::TLSOPT_NONE
)
7224 value
= target
->tlsld_got_offset();
7225 value
-= target
->got_section()->got_base_offset(object
);
7229 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7230 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7231 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7233 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7234 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7235 insn
&= (1 << 26) - (1 << 21); // extract rt
7240 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7241 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7246 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7248 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7249 r_type
= elfcpp::R_POWERPC_NONE
;
7253 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7254 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7255 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7256 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7258 // Accesses relative to a local dynamic sequence address,
7259 // no optimisation here.
7262 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7263 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7267 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7268 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7269 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7271 value
-= target
->got_section()->got_base_offset(object
);
7273 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7274 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7275 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7276 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7278 // First instruction of initial exec sequence.
7279 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7280 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7281 if (tls_type
== tls::TLSOPT_NONE
)
7285 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7286 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7290 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7291 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7292 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7294 value
-= target
->got_section()->got_base_offset(object
);
7298 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7299 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7300 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7302 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7303 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7304 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7309 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7310 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7311 value
= psymval
->value(object
, rela
.get_r_addend());
7315 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7317 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7318 r_type
= elfcpp::R_POWERPC_NONE
;
7322 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7323 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7325 // Second instruction of a global dynamic sequence,
7326 // the __tls_get_addr call
7327 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7328 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7329 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7330 if (tls_type
!= tls::TLSOPT_NONE
)
7332 if (tls_type
== tls::TLSOPT_TO_IE
)
7334 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7335 Insn insn
= add_3_3_13
;
7338 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7339 r_type
= elfcpp::R_POWERPC_NONE
;
7343 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7344 Insn insn
= addi_3_3
;
7345 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7346 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7347 view
+= 2 * big_endian
;
7348 value
= psymval
->value(object
, rela
.get_r_addend());
7350 this->skip_next_tls_get_addr_call();
7353 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7354 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7356 // Second instruction of a local dynamic sequence,
7357 // the __tls_get_addr call
7358 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7359 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7360 if (tls_type
== tls::TLSOPT_TO_LE
)
7362 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7363 Insn insn
= addi_3_3
;
7364 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7365 this->skip_next_tls_get_addr_call();
7366 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7367 view
+= 2 * big_endian
;
7371 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7373 // Second instruction of an initial exec sequence
7374 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7375 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7376 if (tls_type
== tls::TLSOPT_TO_LE
)
7378 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7379 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7380 unsigned int reg
= size
== 32 ? 2 : 13;
7381 insn
= at_tls_transform(insn
, reg
);
7382 gold_assert(insn
!= 0);
7383 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7384 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7385 view
+= 2 * big_endian
;
7386 value
= psymval
->value(object
, rela
.get_r_addend());
7389 else if (!has_stub_value
)
7392 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
7393 addend
= rela
.get_r_addend();
7394 value
= psymval
->value(object
, addend
);
7395 if (size
== 64 && is_branch_reloc(r_type
))
7397 if (target
->abiversion() >= 2)
7400 value
+= object
->ppc64_local_entry_offset(gsym
);
7402 value
+= object
->ppc64_local_entry_offset(r_sym
);
7406 unsigned int dest_shndx
;
7407 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7408 &value
, &dest_shndx
);
7411 Address max_branch_offset
= max_branch_delta(r_type
);
7412 if (max_branch_offset
!= 0
7413 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7415 Stub_table
<size
, big_endian
>* stub_table
7416 = object
->stub_table(relinfo
->data_shndx
);
7417 if (stub_table
!= NULL
)
7419 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7420 if (off
!= invalid_address
)
7422 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7424 has_stub_value
= true;
7432 case elfcpp::R_PPC64_REL64
:
7433 case elfcpp::R_POWERPC_REL32
:
7434 case elfcpp::R_POWERPC_REL24
:
7435 case elfcpp::R_PPC_PLTREL24
:
7436 case elfcpp::R_PPC_LOCAL24PC
:
7437 case elfcpp::R_POWERPC_REL16
:
7438 case elfcpp::R_POWERPC_REL16_LO
:
7439 case elfcpp::R_POWERPC_REL16_HI
:
7440 case elfcpp::R_POWERPC_REL16_HA
:
7441 case elfcpp::R_POWERPC_REL14
:
7442 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7443 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7447 case elfcpp::R_PPC64_TOC16
:
7448 case elfcpp::R_PPC64_TOC16_LO
:
7449 case elfcpp::R_PPC64_TOC16_HI
:
7450 case elfcpp::R_PPC64_TOC16_HA
:
7451 case elfcpp::R_PPC64_TOC16_DS
:
7452 case elfcpp::R_PPC64_TOC16_LO_DS
:
7453 // Subtract the TOC base address.
7454 value
-= (target
->got_section()->output_section()->address()
7455 + object
->toc_base_offset());
7458 case elfcpp::R_POWERPC_SECTOFF
:
7459 case elfcpp::R_POWERPC_SECTOFF_LO
:
7460 case elfcpp::R_POWERPC_SECTOFF_HI
:
7461 case elfcpp::R_POWERPC_SECTOFF_HA
:
7462 case elfcpp::R_PPC64_SECTOFF_DS
:
7463 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7465 value
-= os
->address();
7468 case elfcpp::R_PPC64_TPREL16_DS
:
7469 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7470 case elfcpp::R_PPC64_TPREL16_HIGH
:
7471 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7473 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7475 case elfcpp::R_POWERPC_TPREL16
:
7476 case elfcpp::R_POWERPC_TPREL16_LO
:
7477 case elfcpp::R_POWERPC_TPREL16_HI
:
7478 case elfcpp::R_POWERPC_TPREL16_HA
:
7479 case elfcpp::R_POWERPC_TPREL
:
7480 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7481 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7482 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7483 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7484 // tls symbol values are relative to tls_segment()->vaddr()
7488 case elfcpp::R_PPC64_DTPREL16_DS
:
7489 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7490 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7491 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7492 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7493 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7495 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7496 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7498 case elfcpp::R_POWERPC_DTPREL16
:
7499 case elfcpp::R_POWERPC_DTPREL16_LO
:
7500 case elfcpp::R_POWERPC_DTPREL16_HI
:
7501 case elfcpp::R_POWERPC_DTPREL16_HA
:
7502 case elfcpp::R_POWERPC_DTPREL
:
7503 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7504 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7505 // tls symbol values are relative to tls_segment()->vaddr()
7506 value
-= dtp_offset
;
7509 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7511 value
+= object
->ppc64_local_entry_offset(gsym
);
7513 value
+= object
->ppc64_local_entry_offset(r_sym
);
7520 Insn branch_bit
= 0;
7523 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7524 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7525 branch_bit
= 1 << 21;
7526 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7527 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7529 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7530 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7533 if (this->is_isa_v2
)
7535 // Set 'a' bit. This is 0b00010 in BO field for branch
7536 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7537 // for branch on CTR insns (BO == 1a00t or 1a01t).
7538 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7540 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7547 // Invert 'y' bit if not the default.
7548 if (static_cast<Signed_address
>(value
) < 0)
7551 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7561 // Multi-instruction sequences that access the TOC can be
7562 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7563 // to nop; addi rb,r2,x;
7569 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7570 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7571 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7572 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7573 case elfcpp::R_POWERPC_GOT16_HA
:
7574 case elfcpp::R_PPC64_TOC16_HA
:
7575 if (parameters
->options().toc_optimize())
7577 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7578 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7579 if ((insn
& ((0x3f << 26) | 0x1f << 16))
7580 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7581 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7582 _("toc optimization is not supported "
7583 "for %#08x instruction"), insn
);
7584 else if (value
+ 0x8000 < 0x10000)
7586 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7592 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7593 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7594 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7595 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7596 case elfcpp::R_POWERPC_GOT16_LO
:
7597 case elfcpp::R_PPC64_GOT16_LO_DS
:
7598 case elfcpp::R_PPC64_TOC16_LO
:
7599 case elfcpp::R_PPC64_TOC16_LO_DS
:
7600 if (parameters
->options().toc_optimize())
7602 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7603 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7604 if (!ok_lo_toc_insn(insn
))
7605 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7606 _("toc optimization is not supported "
7607 "for %#08x instruction"), insn
);
7608 else if (value
+ 0x8000 < 0x10000)
7610 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7612 // Transform addic to addi when we change reg.
7613 insn
&= ~((0x3f << 26) | (0x1f << 16));
7614 insn
|= (14u << 26) | (2 << 16);
7618 insn
&= ~(0x1f << 16);
7621 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7628 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7629 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
7632 case elfcpp::R_POWERPC_ADDR32
:
7633 case elfcpp::R_POWERPC_UADDR32
:
7635 overflow
= Reloc::CHECK_BITFIELD
;
7638 case elfcpp::R_POWERPC_REL32
:
7640 overflow
= Reloc::CHECK_SIGNED
;
7643 case elfcpp::R_POWERPC_UADDR16
:
7644 overflow
= Reloc::CHECK_BITFIELD
;
7647 case elfcpp::R_POWERPC_ADDR16
:
7648 // We really should have three separate relocations,
7649 // one for 16-bit data, one for insns with 16-bit signed fields,
7650 // and one for insns with 16-bit unsigned fields.
7651 overflow
= Reloc::CHECK_BITFIELD
;
7652 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
7653 overflow
= Reloc::CHECK_LOW_INSN
;
7656 case elfcpp::R_POWERPC_ADDR16_HI
:
7657 case elfcpp::R_POWERPC_ADDR16_HA
:
7658 case elfcpp::R_POWERPC_GOT16_HI
:
7659 case elfcpp::R_POWERPC_GOT16_HA
:
7660 case elfcpp::R_POWERPC_PLT16_HI
:
7661 case elfcpp::R_POWERPC_PLT16_HA
:
7662 case elfcpp::R_POWERPC_SECTOFF_HI
:
7663 case elfcpp::R_POWERPC_SECTOFF_HA
:
7664 case elfcpp::R_PPC64_TOC16_HI
:
7665 case elfcpp::R_PPC64_TOC16_HA
:
7666 case elfcpp::R_PPC64_PLTGOT16_HI
:
7667 case elfcpp::R_PPC64_PLTGOT16_HA
:
7668 case elfcpp::R_POWERPC_TPREL16_HI
:
7669 case elfcpp::R_POWERPC_TPREL16_HA
:
7670 case elfcpp::R_POWERPC_DTPREL16_HI
:
7671 case elfcpp::R_POWERPC_DTPREL16_HA
:
7672 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7673 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7674 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7675 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7676 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7677 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7678 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7679 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7680 case elfcpp::R_POWERPC_REL16_HI
:
7681 case elfcpp::R_POWERPC_REL16_HA
:
7683 overflow
= Reloc::CHECK_HIGH_INSN
;
7686 case elfcpp::R_POWERPC_REL16
:
7687 case elfcpp::R_PPC64_TOC16
:
7688 case elfcpp::R_POWERPC_GOT16
:
7689 case elfcpp::R_POWERPC_SECTOFF
:
7690 case elfcpp::R_POWERPC_TPREL16
:
7691 case elfcpp::R_POWERPC_DTPREL16
:
7692 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7693 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7694 case elfcpp::R_POWERPC_GOT_TPREL16
:
7695 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7696 overflow
= Reloc::CHECK_LOW_INSN
;
7699 case elfcpp::R_POWERPC_ADDR24
:
7700 case elfcpp::R_POWERPC_ADDR14
:
7701 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7702 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7703 case elfcpp::R_PPC64_ADDR16_DS
:
7704 case elfcpp::R_POWERPC_REL24
:
7705 case elfcpp::R_PPC_PLTREL24
:
7706 case elfcpp::R_PPC_LOCAL24PC
:
7707 case elfcpp::R_PPC64_TPREL16_DS
:
7708 case elfcpp::R_PPC64_DTPREL16_DS
:
7709 case elfcpp::R_PPC64_TOC16_DS
:
7710 case elfcpp::R_PPC64_GOT16_DS
:
7711 case elfcpp::R_PPC64_SECTOFF_DS
:
7712 case elfcpp::R_POWERPC_REL14
:
7713 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7714 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7715 overflow
= Reloc::CHECK_SIGNED
;
7719 if (overflow
== Reloc::CHECK_LOW_INSN
7720 || overflow
== Reloc::CHECK_HIGH_INSN
)
7722 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7723 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7725 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
7726 overflow
= Reloc::CHECK_BITFIELD
;
7727 else if (overflow
== Reloc::CHECK_LOW_INSN
7728 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
7729 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
7730 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
7731 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
7732 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
7733 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
7734 overflow
= Reloc::CHECK_UNSIGNED
;
7736 overflow
= Reloc::CHECK_SIGNED
;
7739 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7740 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7743 case elfcpp::R_POWERPC_NONE
:
7744 case elfcpp::R_POWERPC_TLS
:
7745 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7746 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7749 case elfcpp::R_PPC64_ADDR64
:
7750 case elfcpp::R_PPC64_REL64
:
7751 case elfcpp::R_PPC64_TOC
:
7752 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7753 Reloc::addr64(view
, value
);
7756 case elfcpp::R_POWERPC_TPREL
:
7757 case elfcpp::R_POWERPC_DTPREL
:
7759 Reloc::addr64(view
, value
);
7761 status
= Reloc::addr32(view
, value
, overflow
);
7764 case elfcpp::R_PPC64_UADDR64
:
7765 Reloc::addr64_u(view
, value
);
7768 case elfcpp::R_POWERPC_ADDR32
:
7769 status
= Reloc::addr32(view
, value
, overflow
);
7772 case elfcpp::R_POWERPC_REL32
:
7773 case elfcpp::R_POWERPC_UADDR32
:
7774 status
= Reloc::addr32_u(view
, value
, overflow
);
7777 case elfcpp::R_POWERPC_ADDR24
:
7778 case elfcpp::R_POWERPC_REL24
:
7779 case elfcpp::R_PPC_PLTREL24
:
7780 case elfcpp::R_PPC_LOCAL24PC
:
7781 status
= Reloc::addr24(view
, value
, overflow
);
7784 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7785 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7786 case elfcpp::R_POWERPC_GOT_TPREL16
:
7787 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7790 // On ppc64 these are all ds form
7791 status
= Reloc::addr16_ds(view
, value
, overflow
);
7794 case elfcpp::R_POWERPC_ADDR16
:
7795 case elfcpp::R_POWERPC_REL16
:
7796 case elfcpp::R_PPC64_TOC16
:
7797 case elfcpp::R_POWERPC_GOT16
:
7798 case elfcpp::R_POWERPC_SECTOFF
:
7799 case elfcpp::R_POWERPC_TPREL16
:
7800 case elfcpp::R_POWERPC_DTPREL16
:
7801 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7802 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7803 case elfcpp::R_POWERPC_ADDR16_LO
:
7804 case elfcpp::R_POWERPC_REL16_LO
:
7805 case elfcpp::R_PPC64_TOC16_LO
:
7806 case elfcpp::R_POWERPC_GOT16_LO
:
7807 case elfcpp::R_POWERPC_SECTOFF_LO
:
7808 case elfcpp::R_POWERPC_TPREL16_LO
:
7809 case elfcpp::R_POWERPC_DTPREL16_LO
:
7810 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7811 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7812 status
= Reloc::addr16(view
, value
, overflow
);
7815 case elfcpp::R_POWERPC_UADDR16
:
7816 status
= Reloc::addr16_u(view
, value
, overflow
);
7819 case elfcpp::R_PPC64_ADDR16_HIGH
:
7820 case elfcpp::R_PPC64_TPREL16_HIGH
:
7821 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7823 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7825 case elfcpp::R_POWERPC_ADDR16_HI
:
7826 case elfcpp::R_POWERPC_REL16_HI
:
7827 case elfcpp::R_PPC64_TOC16_HI
:
7828 case elfcpp::R_POWERPC_GOT16_HI
:
7829 case elfcpp::R_POWERPC_SECTOFF_HI
:
7830 case elfcpp::R_POWERPC_TPREL16_HI
:
7831 case elfcpp::R_POWERPC_DTPREL16_HI
:
7832 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7833 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7834 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7835 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7836 Reloc::addr16_hi(view
, value
);
7839 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7840 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7841 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7843 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7845 case elfcpp::R_POWERPC_ADDR16_HA
:
7846 case elfcpp::R_POWERPC_REL16_HA
:
7847 case elfcpp::R_PPC64_TOC16_HA
:
7848 case elfcpp::R_POWERPC_GOT16_HA
:
7849 case elfcpp::R_POWERPC_SECTOFF_HA
:
7850 case elfcpp::R_POWERPC_TPREL16_HA
:
7851 case elfcpp::R_POWERPC_DTPREL16_HA
:
7852 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7853 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7854 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7855 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7856 Reloc::addr16_ha(view
, value
);
7859 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7861 // R_PPC_EMB_NADDR16_LO
7863 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7864 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7865 Reloc::addr16_hi2(view
, value
);
7868 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7870 // R_PPC_EMB_NADDR16_HI
7872 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7873 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7874 Reloc::addr16_ha2(view
, value
);
7877 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7879 // R_PPC_EMB_NADDR16_HA
7881 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7882 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7883 Reloc::addr16_hi3(view
, value
);
7886 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7890 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7891 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7892 Reloc::addr16_ha3(view
, value
);
7895 case elfcpp::R_PPC64_DTPREL16_DS
:
7896 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7898 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7900 case elfcpp::R_PPC64_TPREL16_DS
:
7901 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7903 // R_PPC_TLSGD, R_PPC_TLSLD
7905 case elfcpp::R_PPC64_ADDR16_DS
:
7906 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7907 case elfcpp::R_PPC64_TOC16_DS
:
7908 case elfcpp::R_PPC64_TOC16_LO_DS
:
7909 case elfcpp::R_PPC64_GOT16_DS
:
7910 case elfcpp::R_PPC64_GOT16_LO_DS
:
7911 case elfcpp::R_PPC64_SECTOFF_DS
:
7912 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7913 status
= Reloc::addr16_ds(view
, value
, overflow
);
7916 case elfcpp::R_POWERPC_ADDR14
:
7917 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7918 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7919 case elfcpp::R_POWERPC_REL14
:
7920 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7921 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7922 status
= Reloc::addr14(view
, value
, overflow
);
7925 case elfcpp::R_POWERPC_COPY
:
7926 case elfcpp::R_POWERPC_GLOB_DAT
:
7927 case elfcpp::R_POWERPC_JMP_SLOT
:
7928 case elfcpp::R_POWERPC_RELATIVE
:
7929 case elfcpp::R_POWERPC_DTPMOD
:
7930 case elfcpp::R_PPC64_JMP_IREL
:
7931 case elfcpp::R_POWERPC_IRELATIVE
:
7932 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7933 _("unexpected reloc %u in object file"),
7937 case elfcpp::R_PPC_EMB_SDA21
:
7942 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7946 case elfcpp::R_PPC_EMB_SDA2I16
:
7947 case elfcpp::R_PPC_EMB_SDA2REL
:
7950 // R_PPC64_TLSGD, R_PPC64_TLSLD
7953 case elfcpp::R_POWERPC_PLT32
:
7954 case elfcpp::R_POWERPC_PLTREL32
:
7955 case elfcpp::R_POWERPC_PLT16_LO
:
7956 case elfcpp::R_POWERPC_PLT16_HI
:
7957 case elfcpp::R_POWERPC_PLT16_HA
:
7958 case elfcpp::R_PPC_SDAREL16
:
7959 case elfcpp::R_POWERPC_ADDR30
:
7960 case elfcpp::R_PPC64_PLT64
:
7961 case elfcpp::R_PPC64_PLTREL64
:
7962 case elfcpp::R_PPC64_PLTGOT16
:
7963 case elfcpp::R_PPC64_PLTGOT16_LO
:
7964 case elfcpp::R_PPC64_PLTGOT16_HI
:
7965 case elfcpp::R_PPC64_PLTGOT16_HA
:
7966 case elfcpp::R_PPC64_PLT16_LO_DS
:
7967 case elfcpp::R_PPC64_PLTGOT16_DS
:
7968 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7969 case elfcpp::R_PPC_EMB_RELSDA
:
7970 case elfcpp::R_PPC_TOC16
:
7973 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7974 _("unsupported reloc %u"),
7978 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
7981 && gsym
->is_undefined()
7982 && is_branch_reloc(r_type
))))
7984 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7985 _("relocation overflow"));
7987 gold_info(_("try relinking with a smaller --stub-group-size"));
7993 // Relocate section data.
7995 template<int size
, bool big_endian
>
7997 Target_powerpc
<size
, big_endian
>::relocate_section(
7998 const Relocate_info
<size
, big_endian
>* relinfo
,
7999 unsigned int sh_type
,
8000 const unsigned char* prelocs
,
8002 Output_section
* output_section
,
8003 bool needs_special_offset_handling
,
8004 unsigned char* view
,
8006 section_size_type view_size
,
8007 const Reloc_symbol_changes
* reloc_symbol_changes
)
8009 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8010 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8011 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8012 Powerpc_comdat_behavior
;
8014 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8016 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
8017 Powerpc_relocate
, Powerpc_comdat_behavior
>(
8023 needs_special_offset_handling
,
8027 reloc_symbol_changes
);
8030 class Powerpc_scan_relocatable_reloc
8033 // Return the strategy to use for a local symbol which is not a
8034 // section symbol, given the relocation type.
8035 inline Relocatable_relocs::Reloc_strategy
8036 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8038 if (r_type
== 0 && r_sym
== 0)
8039 return Relocatable_relocs::RELOC_DISCARD
;
8040 return Relocatable_relocs::RELOC_COPY
;
8043 // Return the strategy to use for a local symbol which is a section
8044 // symbol, given the relocation type.
8045 inline Relocatable_relocs::Reloc_strategy
8046 local_section_strategy(unsigned int, Relobj
*)
8048 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8051 // Return the strategy to use for a global symbol, given the
8052 // relocation type, the object, and the symbol index.
8053 inline Relocatable_relocs::Reloc_strategy
8054 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8056 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8057 return Relocatable_relocs::RELOC_SPECIAL
;
8058 return Relocatable_relocs::RELOC_COPY
;
8062 // Scan the relocs during a relocatable link.
8064 template<int size
, bool big_endian
>
8066 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8067 Symbol_table
* symtab
,
8069 Sized_relobj_file
<size
, big_endian
>* object
,
8070 unsigned int data_shndx
,
8071 unsigned int sh_type
,
8072 const unsigned char* prelocs
,
8074 Output_section
* output_section
,
8075 bool needs_special_offset_handling
,
8076 size_t local_symbol_count
,
8077 const unsigned char* plocal_symbols
,
8078 Relocatable_relocs
* rr
)
8080 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8082 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
8083 Powerpc_scan_relocatable_reloc
>(
8091 needs_special_offset_handling
,
8097 // Emit relocations for a section.
8098 // This is a modified version of the function by the same name in
8099 // target-reloc.h. Using relocate_special_relocatable for
8100 // R_PPC_PLTREL24 would require duplication of the entire body of the
8101 // loop, so we may as well duplicate the whole thing.
8103 template<int size
, bool big_endian
>
8105 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8106 const Relocate_info
<size
, big_endian
>* relinfo
,
8107 unsigned int sh_type
,
8108 const unsigned char* prelocs
,
8110 Output_section
* output_section
,
8111 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8112 const Relocatable_relocs
* rr
,
8114 Address view_address
,
8116 unsigned char* reloc_view
,
8117 section_size_type reloc_view_size
)
8119 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8121 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8123 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
8125 const int reloc_size
8126 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8128 Powerpc_relobj
<size
, big_endian
>* const object
8129 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8130 const unsigned int local_count
= object
->local_symbol_count();
8131 unsigned int got2_shndx
= object
->got2_shndx();
8132 Address got2_addend
= 0;
8133 if (got2_shndx
!= 0)
8135 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8136 gold_assert(got2_addend
!= invalid_address
);
8139 unsigned char* pwrite
= reloc_view
;
8140 bool zap_next
= false;
8141 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8143 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
8144 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8147 Reltype
reloc(prelocs
);
8148 Reltype_write
reloc_write(pwrite
);
8150 Address offset
= reloc
.get_r_offset();
8151 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8152 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8153 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8154 const unsigned int orig_r_sym
= r_sym
;
8155 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8156 = reloc
.get_r_addend();
8157 const Symbol
* gsym
= NULL
;
8161 // We could arrange to discard these and other relocs for
8162 // tls optimised sequences in the strategy methods, but for
8163 // now do as BFD ld does.
8164 r_type
= elfcpp::R_POWERPC_NONE
;
8168 // Get the new symbol index.
8169 Output_section
* os
= NULL
;
8170 if (r_sym
< local_count
)
8174 case Relocatable_relocs::RELOC_COPY
:
8175 case Relocatable_relocs::RELOC_SPECIAL
:
8178 r_sym
= object
->symtab_index(r_sym
);
8179 gold_assert(r_sym
!= -1U);
8183 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
8185 // We are adjusting a section symbol. We need to find
8186 // the symbol table index of the section symbol for
8187 // the output section corresponding to input section
8188 // in which this symbol is defined.
8189 gold_assert(r_sym
< local_count
);
8191 unsigned int shndx
=
8192 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8193 gold_assert(is_ordinary
);
8194 os
= object
->output_section(shndx
);
8195 gold_assert(os
!= NULL
);
8196 gold_assert(os
->needs_symtab_index());
8197 r_sym
= os
->symtab_index();
8207 gsym
= object
->global_symbol(r_sym
);
8208 gold_assert(gsym
!= NULL
);
8209 if (gsym
->is_forwarder())
8210 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
8212 gold_assert(gsym
->has_symtab_index());
8213 r_sym
= gsym
->symtab_index();
8216 // Get the new offset--the location in the output section where
8217 // this relocation should be applied.
8218 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8219 offset
+= offset_in_output_section
;
8222 section_offset_type sot_offset
=
8223 convert_types
<section_offset_type
, Address
>(offset
);
8224 section_offset_type new_sot_offset
=
8225 output_section
->output_offset(object
, relinfo
->data_shndx
,
8227 gold_assert(new_sot_offset
!= -1);
8228 offset
= new_sot_offset
;
8231 // In an object file, r_offset is an offset within the section.
8232 // In an executable or dynamic object, generated by
8233 // --emit-relocs, r_offset is an absolute address.
8234 if (!parameters
->options().relocatable())
8236 offset
+= view_address
;
8237 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8238 offset
-= offset_in_output_section
;
8241 // Handle the reloc addend based on the strategy.
8242 if (strategy
== Relocatable_relocs::RELOC_COPY
)
8244 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
8246 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
8247 gold_assert(os
!= NULL
);
8248 addend
= psymval
->value(object
, addend
) - os
->address();
8250 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
8252 if (addend
>= 32768)
8253 addend
+= got2_addend
;
8258 if (!parameters
->options().relocatable())
8260 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8261 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8262 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8263 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8265 // First instruction of a global dynamic sequence,
8267 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8268 switch (this->optimize_tls_gd(final
))
8270 case tls::TLSOPT_TO_IE
:
8271 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8272 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8274 case tls::TLSOPT_TO_LE
:
8275 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8276 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8277 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8280 r_type
= elfcpp::R_POWERPC_NONE
;
8281 offset
-= 2 * big_endian
;
8288 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8289 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8290 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8291 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8293 // First instruction of a local dynamic sequence,
8295 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8297 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8298 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8300 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8301 const Output_section
* os
= relinfo
->layout
->tls_segment()
8303 gold_assert(os
!= NULL
);
8304 gold_assert(os
->needs_symtab_index());
8305 r_sym
= os
->symtab_index();
8306 addend
= dtp_offset
;
8310 r_type
= elfcpp::R_POWERPC_NONE
;
8311 offset
-= 2 * big_endian
;
8315 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8316 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8317 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8318 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8320 // First instruction of initial exec sequence.
8321 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8322 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8324 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8325 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8326 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8329 r_type
= elfcpp::R_POWERPC_NONE
;
8330 offset
-= 2 * big_endian
;
8334 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8335 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8337 // Second instruction of a global dynamic sequence,
8338 // the __tls_get_addr call
8339 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8340 switch (this->optimize_tls_gd(final
))
8342 case tls::TLSOPT_TO_IE
:
8343 r_type
= elfcpp::R_POWERPC_NONE
;
8346 case tls::TLSOPT_TO_LE
:
8347 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8348 offset
+= 2 * big_endian
;
8355 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8356 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8358 // Second instruction of a local dynamic sequence,
8359 // the __tls_get_addr call
8360 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8362 const Output_section
* os
= relinfo
->layout
->tls_segment()
8364 gold_assert(os
!= NULL
);
8365 gold_assert(os
->needs_symtab_index());
8366 r_sym
= os
->symtab_index();
8367 addend
= dtp_offset
;
8368 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8369 offset
+= 2 * big_endian
;
8373 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8375 // Second instruction of an initial exec sequence
8376 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8377 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8379 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8380 offset
+= 2 * big_endian
;
8385 reloc_write
.put_r_offset(offset
);
8386 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
8387 reloc_write
.put_r_addend(addend
);
8389 pwrite
+= reloc_size
;
8392 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
8393 == reloc_view_size
);
8396 // Return the value to use for a dynamic symbol which requires special
8397 // treatment. This is how we support equality comparisons of function
8398 // pointers across shared library boundaries, as described in the
8399 // processor specific ABI supplement.
8401 template<int size
, bool big_endian
>
8403 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8407 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
8408 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8409 p
!= this->stub_tables_
.end();
8412 Address off
= (*p
)->find_plt_call_entry(gsym
);
8413 if (off
!= invalid_address
)
8414 return (*p
)->stub_address() + off
;
8417 else if (this->abiversion() >= 2)
8419 Address off
= this->glink_section()->find_global_entry(gsym
);
8420 if (off
!= invalid_address
)
8421 return this->glink_section()->global_entry_address() + off
;
8426 // Return the PLT address to use for a local symbol.
8427 template<int size
, bool big_endian
>
8429 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8430 const Relobj
* object
,
8431 unsigned int symndx
) const
8435 const Sized_relobj
<size
, big_endian
>* relobj
8436 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8437 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8438 p
!= this->stub_tables_
.end();
8441 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8443 if (off
!= invalid_address
)
8444 return (*p
)->stub_address() + off
;
8450 // Return the PLT address to use for a global symbol.
8451 template<int size
, bool big_endian
>
8453 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8454 const Symbol
* gsym
) const
8458 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8459 p
!= this->stub_tables_
.end();
8462 Address off
= (*p
)->find_plt_call_entry(gsym
);
8463 if (off
!= invalid_address
)
8464 return (*p
)->stub_address() + off
;
8467 else if (this->abiversion() >= 2)
8469 Address off
= this->glink_section()->find_global_entry(gsym
);
8470 if (off
!= invalid_address
)
8471 return this->glink_section()->global_entry_address() + off
;
8476 // Return the offset to use for the GOT_INDX'th got entry which is
8477 // for a local tls symbol specified by OBJECT, SYMNDX.
8478 template<int size
, bool big_endian
>
8480 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8481 const Relobj
* object
,
8482 unsigned int symndx
,
8483 unsigned int got_indx
) const
8485 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8486 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8487 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8489 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8490 got_type
<= GOT_TYPE_TPREL
;
8491 got_type
= Got_type(got_type
+ 1))
8492 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8494 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8495 if (got_type
== GOT_TYPE_TLSGD
)
8497 if (off
== got_indx
* (size
/ 8))
8499 if (got_type
== GOT_TYPE_TPREL
)
8509 // Return the offset to use for the GOT_INDX'th got entry which is
8510 // for global tls symbol GSYM.
8511 template<int size
, bool big_endian
>
8513 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8515 unsigned int got_indx
) const
8517 if (gsym
->type() == elfcpp::STT_TLS
)
8519 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8520 got_type
<= GOT_TYPE_TPREL
;
8521 got_type
= Got_type(got_type
+ 1))
8522 if (gsym
->has_got_offset(got_type
))
8524 unsigned int off
= gsym
->got_offset(got_type
);
8525 if (got_type
== GOT_TYPE_TLSGD
)
8527 if (off
== got_indx
* (size
/ 8))
8529 if (got_type
== GOT_TYPE_TPREL
)
8539 // The selector for powerpc object files.
8541 template<int size
, bool big_endian
>
8542 class Target_selector_powerpc
: public Target_selector
8545 Target_selector_powerpc()
8546 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8549 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8550 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8552 ? (big_endian
? "elf64ppc" : "elf64lppc")
8553 : (big_endian
? "elf32ppc" : "elf32lppc")))
8557 do_instantiate_target()
8558 { return new Target_powerpc
<size
, big_endian
>(); }
8561 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8562 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8563 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8564 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8566 // Instantiate these constants for -O0
8567 template<int size
, bool big_endian
>
8568 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8569 template<int size
, bool big_endian
>
8570 const typename Output_data_glink
<size
, big_endian
>::Address
8571 Output_data_glink
<size
, big_endian
>::invalid_address
;
8572 template<int size
, bool big_endian
>
8573 const typename Stub_table
<size
, big_endian
>::Address
8574 Stub_table
<size
, big_endian
>::invalid_address
;
8575 template<int size
, bool big_endian
>
8576 const typename Target_powerpc
<size
, big_endian
>::Address
8577 Target_powerpc
<size
, big_endian
>::invalid_address
;
8579 } // End anonymous namespace.