1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
65 template<int size
, bool big_endian
>
66 class Output_data_save_res
;
68 template<int size
, bool big_endian
>
71 struct Stub_table_owner
73 Output_section
* output_section
;
74 const Output_section::Input_section
* owner
;
78 is_branch_reloc(unsigned int r_type
);
80 template<int size
, bool big_endian
>
81 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
84 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
85 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
86 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
88 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
89 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
90 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
91 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
92 opd_ent_(), access_from_map_(), has14_(), stub_table_index_(),
93 e_flags_(ehdr
.get_e_flags()), st_other_()
95 this->set_abiversion(0);
101 // Read the symbols then set up st_other vector.
103 do_read_symbols(Read_symbols_data
*);
105 // The .got2 section shndx.
110 return this->special_
;
115 // The .opd section shndx.
122 return this->special_
;
125 // Init OPD entry arrays.
127 init_opd(size_t opd_size
)
129 size_t count
= this->opd_ent_ndx(opd_size
);
130 this->opd_ent_
.resize(count
);
133 // Return section and offset of function entry for .opd + R_OFF.
135 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
137 size_t ndx
= this->opd_ent_ndx(r_off
);
138 gold_assert(ndx
< this->opd_ent_
.size());
139 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
141 *value
= this->opd_ent_
[ndx
].off
;
142 return this->opd_ent_
[ndx
].shndx
;
145 // Set section and offset of function entry for .opd + R_OFF.
147 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
149 size_t ndx
= this->opd_ent_ndx(r_off
);
150 gold_assert(ndx
< this->opd_ent_
.size());
151 this->opd_ent_
[ndx
].shndx
= shndx
;
152 this->opd_ent_
[ndx
].off
= value
;
155 // Return discard flag for .opd + R_OFF.
157 get_opd_discard(Address r_off
) const
159 size_t ndx
= this->opd_ent_ndx(r_off
);
160 gold_assert(ndx
< this->opd_ent_
.size());
161 return this->opd_ent_
[ndx
].discard
;
164 // Set discard flag for .opd + R_OFF.
166 set_opd_discard(Address r_off
)
168 size_t ndx
= this->opd_ent_ndx(r_off
);
169 gold_assert(ndx
< this->opd_ent_
.size());
170 this->opd_ent_
[ndx
].discard
= true;
175 { return this->opd_valid_
; }
179 { this->opd_valid_
= true; }
181 // Examine .rela.opd to build info about function entry points.
183 scan_opd_relocs(size_t reloc_count
,
184 const unsigned char* prelocs
,
185 const unsigned char* plocal_syms
);
187 // Perform the Sized_relobj_file method, then set up opd info from
190 do_read_relocs(Read_relocs_data
*);
193 do_find_special_sections(Read_symbols_data
* sd
);
195 // Adjust this local symbol value. Return false if the symbol
196 // should be discarded from the output file.
198 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
200 if (size
== 64 && this->opd_shndx() != 0)
203 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
205 if (this->get_opd_discard(lv
->input_value()))
213 { return &this->access_from_map_
; }
215 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
216 // section at DST_OFF.
218 add_reference(Relobj
* src_obj
,
219 unsigned int src_indx
,
220 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
222 Section_id
src_id(src_obj
, src_indx
);
223 this->access_from_map_
[dst_off
].insert(src_id
);
226 // Add a reference to the code section specified by the .opd entry
229 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
231 size_t ndx
= this->opd_ent_ndx(dst_off
);
232 if (ndx
>= this->opd_ent_
.size())
233 this->opd_ent_
.resize(ndx
+ 1);
234 this->opd_ent_
[ndx
].gc_mark
= true;
238 process_gc_mark(Symbol_table
* symtab
)
240 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
241 if (this->opd_ent_
[i
].gc_mark
)
243 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
244 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
248 // Return offset in output GOT section that this object will use
249 // as a TOC pointer. Won't be just a constant with multi-toc support.
251 toc_base_offset() const
255 set_has_small_toc_reloc()
256 { has_small_toc_reloc_
= true; }
259 has_small_toc_reloc() const
260 { return has_small_toc_reloc_
; }
263 set_has_14bit_branch(unsigned int shndx
)
265 if (shndx
>= this->has14_
.size())
266 this->has14_
.resize(shndx
+ 1);
267 this->has14_
[shndx
] = true;
271 has_14bit_branch(unsigned int shndx
) const
272 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
275 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
277 if (shndx
>= this->stub_table_index_
.size())
278 this->stub_table_index_
.resize(shndx
+ 1);
279 this->stub_table_index_
[shndx
] = stub_index
;
282 Stub_table
<size
, big_endian
>*
283 stub_table(unsigned int shndx
)
285 if (shndx
< this->stub_table_index_
.size())
287 Target_powerpc
<size
, big_endian
>* target
288 = static_cast<Target_powerpc
<size
, big_endian
>*>(
289 parameters
->sized_target
<size
, big_endian
>());
290 unsigned int indx
= this->stub_table_index_
[shndx
];
291 gold_assert(indx
< target
->stub_tables().size());
292 return target
->stub_tables()[indx
];
300 this->stub_table_index_
.clear();
305 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
307 // Set ABI version for input and output
309 set_abiversion(int ver
);
312 ppc64_local_entry_offset(const Symbol
* sym
) const
313 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
316 ppc64_local_entry_offset(unsigned int symndx
) const
317 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
328 // Return index into opd_ent_ array for .opd entry at OFF.
329 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
330 // apart when the language doesn't use the last 8-byte word, the
331 // environment pointer. Thus dividing the entry section offset by
332 // 16 will give an index into opd_ent_ that works for either layout
333 // of .opd. (It leaves some elements of the vector unused when .opd
334 // entries are spaced 24 bytes apart, but we don't know the spacing
335 // until relocations are processed, and in any case it is possible
336 // for an object to have some entries spaced 16 bytes apart and
337 // others 24 bytes apart.)
339 opd_ent_ndx(size_t off
) const
342 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
343 unsigned int special_
;
345 // For 64-bit, whether this object uses small model relocs to access
347 bool has_small_toc_reloc_
;
349 // Set at the start of gc_process_relocs, when we know opd_ent_
350 // vector is valid. The flag could be made atomic and set in
351 // do_read_relocs with memory_order_release and then tested with
352 // memory_order_acquire, potentially resulting in fewer entries in
356 // The first 8-byte word of an OPD entry gives the address of the
357 // entry point of the function. Relocatable object files have a
358 // relocation on this word. The following vector records the
359 // section and offset specified by these relocations.
360 std::vector
<Opd_ent
> opd_ent_
;
362 // References made to this object's .opd section when running
363 // gc_process_relocs for another object, before the opd_ent_ vector
364 // is valid for this object.
365 Access_from access_from_map_
;
367 // Whether input section has a 14-bit branch reloc.
368 std::vector
<bool> has14_
;
370 // The stub table to use for a given input section.
371 std::vector
<unsigned int> stub_table_index_
;
374 elfcpp::Elf_Word e_flags_
;
376 // ELF st_other field for local symbols.
377 std::vector
<unsigned char> st_other_
;
380 template<int size
, bool big_endian
>
381 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
384 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
386 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
387 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
388 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
389 opd_shndx_(0), opd_ent_(), e_flags_(ehdr
.get_e_flags())
391 this->set_abiversion(0);
397 // Call Sized_dynobj::do_read_symbols to read the symbols then
398 // read .opd from a dynamic object, filling in opd_ent_ vector,
400 do_read_symbols(Read_symbols_data
*);
402 // The .opd section shndx.
406 return this->opd_shndx_
;
409 // The .opd section address.
413 return this->opd_address_
;
416 // Init OPD entry arrays.
418 init_opd(size_t opd_size
)
420 size_t count
= this->opd_ent_ndx(opd_size
);
421 this->opd_ent_
.resize(count
);
424 // Return section and offset of function entry for .opd + R_OFF.
426 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
428 size_t ndx
= this->opd_ent_ndx(r_off
);
429 gold_assert(ndx
< this->opd_ent_
.size());
430 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
432 *value
= this->opd_ent_
[ndx
].off
;
433 return this->opd_ent_
[ndx
].shndx
;
436 // Set section and offset of function entry for .opd + R_OFF.
438 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
440 size_t ndx
= this->opd_ent_ndx(r_off
);
441 gold_assert(ndx
< this->opd_ent_
.size());
442 this->opd_ent_
[ndx
].shndx
= shndx
;
443 this->opd_ent_
[ndx
].off
= value
;
448 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
450 // Set ABI version for input and output.
452 set_abiversion(int ver
);
455 // Used to specify extent of executable sections.
458 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
459 : start(start_
), len(len_
), shndx(shndx_
)
463 operator<(const Sec_info
& that
) const
464 { return this->start
< that
.start
; }
477 // Return index into opd_ent_ array for .opd entry at OFF.
479 opd_ent_ndx(size_t off
) const
482 // For 64-bit the .opd section shndx and address.
483 unsigned int opd_shndx_
;
484 Address opd_address_
;
486 // The first 8-byte word of an OPD entry gives the address of the
487 // entry point of the function. Records the section and offset
488 // corresponding to the address. Note that in dynamic objects,
489 // offset is *not* relative to the section.
490 std::vector
<Opd_ent
> opd_ent_
;
493 elfcpp::Elf_Word e_flags_
;
496 template<int size
, bool big_endian
>
497 class Target_powerpc
: public Sized_target
<size
, big_endian
>
501 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
502 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
503 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
504 static const Address invalid_address
= static_cast<Address
>(0) - 1;
505 // Offset of tp and dtp pointers from start of TLS block.
506 static const Address tp_offset
= 0x7000;
507 static const Address dtp_offset
= 0x8000;
510 : Sized_target
<size
, big_endian
>(&powerpc_info
),
511 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
512 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
513 tlsld_got_offset_(-1U),
514 stub_tables_(), branch_lookup_table_(), branch_info_(),
515 plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0),
516 stub_group_size_(0), savres_section_(0)
520 // Process the relocations to determine unreferenced sections for
521 // garbage collection.
523 gc_process_relocs(Symbol_table
* symtab
,
525 Sized_relobj_file
<size
, big_endian
>* object
,
526 unsigned int data_shndx
,
527 unsigned int sh_type
,
528 const unsigned char* prelocs
,
530 Output_section
* output_section
,
531 bool needs_special_offset_handling
,
532 size_t local_symbol_count
,
533 const unsigned char* plocal_symbols
);
535 // Scan the relocations to look for symbol adjustments.
537 scan_relocs(Symbol_table
* symtab
,
539 Sized_relobj_file
<size
, big_endian
>* object
,
540 unsigned int data_shndx
,
541 unsigned int sh_type
,
542 const unsigned char* prelocs
,
544 Output_section
* output_section
,
545 bool needs_special_offset_handling
,
546 size_t local_symbol_count
,
547 const unsigned char* plocal_symbols
);
549 // Map input .toc section to output .got section.
551 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
553 if (size
== 64 && strcmp(name
, ".toc") == 0)
561 // Provide linker defined save/restore functions.
563 define_save_restore_funcs(Layout
*, Symbol_table
*);
565 // No stubs unless a final link.
568 { return !parameters
->options().relocatable(); }
571 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
574 do_plt_fde_location(const Output_data
*, unsigned char*,
575 uint64_t*, off_t
*) const;
577 // Stash info about branches, for stub generation.
579 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
580 unsigned int data_shndx
, Address r_offset
,
581 unsigned int r_type
, unsigned int r_sym
, Address addend
)
583 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
584 this->branch_info_
.push_back(info
);
585 if (r_type
== elfcpp::R_POWERPC_REL14
586 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
587 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
588 ppc_object
->set_has_14bit_branch(data_shndx
);
592 do_define_standard_symbols(Symbol_table
*, Layout
*);
594 // Finalize the sections.
596 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
598 // Return the value to use for a dynamic which requires special
601 do_dynsym_value(const Symbol
*) const;
603 // Return the PLT address to use for a local symbol.
605 do_plt_address_for_local(const Relobj
*, unsigned int) const;
607 // Return the PLT address to use for a global symbol.
609 do_plt_address_for_global(const Symbol
*) const;
611 // Return the offset to use for the GOT_INDX'th got entry which is
612 // for a local tls symbol specified by OBJECT, SYMNDX.
614 do_tls_offset_for_local(const Relobj
* object
,
616 unsigned int got_indx
) const;
618 // Return the offset to use for the GOT_INDX'th got entry which is
619 // for global tls symbol GSYM.
621 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
624 do_function_location(Symbol_location
*) const;
627 do_can_check_for_function_pointers() const
630 // Adjust -fsplit-stack code which calls non-split-stack code.
632 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
633 section_offset_type fnoffset
, section_size_type fnsize
,
634 unsigned char* view
, section_size_type view_size
,
635 std::string
* from
, std::string
* to
) const;
637 // Relocate a section.
639 relocate_section(const Relocate_info
<size
, big_endian
>*,
640 unsigned int sh_type
,
641 const unsigned char* prelocs
,
643 Output_section
* output_section
,
644 bool needs_special_offset_handling
,
646 Address view_address
,
647 section_size_type view_size
,
648 const Reloc_symbol_changes
*);
650 // Scan the relocs during a relocatable link.
652 scan_relocatable_relocs(Symbol_table
* symtab
,
654 Sized_relobj_file
<size
, big_endian
>* object
,
655 unsigned int data_shndx
,
656 unsigned int sh_type
,
657 const unsigned char* prelocs
,
659 Output_section
* output_section
,
660 bool needs_special_offset_handling
,
661 size_t local_symbol_count
,
662 const unsigned char* plocal_symbols
,
663 Relocatable_relocs
*);
665 // Emit relocations for a section.
667 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
668 unsigned int sh_type
,
669 const unsigned char* prelocs
,
671 Output_section
* output_section
,
672 typename
elfcpp::Elf_types
<size
>::Elf_Off
673 offset_in_output_section
,
674 const Relocatable_relocs
*,
676 Address view_address
,
678 unsigned char* reloc_view
,
679 section_size_type reloc_view_size
);
681 // Return whether SYM is defined by the ABI.
683 do_is_defined_by_abi(const Symbol
* sym
) const
685 return strcmp(sym
->name(), "__tls_get_addr") == 0;
688 // Return the size of the GOT section.
692 gold_assert(this->got_
!= NULL
);
693 return this->got_
->data_size();
696 // Get the PLT section.
697 const Output_data_plt_powerpc
<size
, big_endian
>*
700 gold_assert(this->plt_
!= NULL
);
704 // Get the IPLT section.
705 const Output_data_plt_powerpc
<size
, big_endian
>*
708 gold_assert(this->iplt_
!= NULL
);
712 // Get the .glink section.
713 const Output_data_glink
<size
, big_endian
>*
714 glink_section() const
716 gold_assert(this->glink_
!= NULL
);
720 Output_data_glink
<size
, big_endian
>*
723 gold_assert(this->glink_
!= NULL
);
727 bool has_glink() const
728 { return this->glink_
!= NULL
; }
730 // Get the GOT section.
731 const Output_data_got_powerpc
<size
, big_endian
>*
734 gold_assert(this->got_
!= NULL
);
738 // Get the GOT section, creating it if necessary.
739 Output_data_got_powerpc
<size
, big_endian
>*
740 got_section(Symbol_table
*, Layout
*);
743 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
744 const elfcpp::Ehdr
<size
, big_endian
>&);
746 // Return the number of entries in the GOT.
748 got_entry_count() const
750 if (this->got_
== NULL
)
752 return this->got_size() / (size
/ 8);
755 // Return the number of entries in the PLT.
757 plt_entry_count() const;
759 // Return the offset of the first non-reserved PLT entry.
761 first_plt_entry_offset() const
765 if (this->abiversion() >= 2)
770 // Return the size of each PLT entry.
772 plt_entry_size() const
776 if (this->abiversion() >= 2)
781 Output_data_save_res
<size
, big_endian
>*
782 savres_section() const
784 return this->savres_section_
;
787 // Add any special sections for this symbol to the gc work list.
788 // For powerpc64, this adds the code section of a function
791 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
793 // Handle target specific gc actions when adding a gc reference from
794 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
795 // and DST_OFF. For powerpc64, this adds a referenc to the code
796 // section of a function descriptor.
798 do_gc_add_reference(Symbol_table
* symtab
,
800 unsigned int src_shndx
,
802 unsigned int dst_shndx
,
803 Address dst_off
) const;
805 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
808 { return this->stub_tables_
; }
810 const Output_data_brlt_powerpc
<size
, big_endian
>*
812 { return this->brlt_section_
; }
815 add_branch_lookup_table(Address to
)
817 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
818 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
822 find_branch_lookup_table(Address to
)
824 typename
Branch_lookup_table::const_iterator p
825 = this->branch_lookup_table_
.find(to
);
826 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
830 write_branch_lookup_table(unsigned char *oview
)
832 for (typename
Branch_lookup_table::const_iterator p
833 = this->branch_lookup_table_
.begin();
834 p
!= this->branch_lookup_table_
.end();
837 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
842 plt_thread_safe() const
843 { return this->plt_thread_safe_
; }
847 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
850 set_abiversion (int ver
)
852 elfcpp::Elf_Word flags
= this->processor_specific_flags();
853 flags
&= ~elfcpp::EF_PPC64_ABI
;
854 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
855 this->set_processor_specific_flags(flags
);
858 // Offset to to save stack slot
861 { return this->abiversion() < 2 ? 40 : 24; }
877 : tls_get_addr_(NOT_EXPECTED
),
878 relinfo_(NULL
), relnum_(0), r_offset_(0)
883 if (this->tls_get_addr_
!= NOT_EXPECTED
)
890 if (this->relinfo_
!= NULL
)
891 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
892 _("missing expected __tls_get_addr call"));
896 expect_tls_get_addr_call(
897 const Relocate_info
<size
, big_endian
>* relinfo
,
901 this->tls_get_addr_
= EXPECTED
;
902 this->relinfo_
= relinfo
;
903 this->relnum_
= relnum
;
904 this->r_offset_
= r_offset
;
908 expect_tls_get_addr_call()
909 { this->tls_get_addr_
= EXPECTED
; }
912 skip_next_tls_get_addr_call()
913 {this->tls_get_addr_
= SKIP
; }
916 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
918 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
919 || r_type
== elfcpp::R_PPC_PLTREL24
)
921 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
922 Tls_get_addr last_tls
= this->tls_get_addr_
;
923 this->tls_get_addr_
= NOT_EXPECTED
;
924 if (is_tls_call
&& last_tls
!= EXPECTED
)
926 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
935 // What we're up to regarding calls to __tls_get_addr.
936 // On powerpc, the branch and link insn making a call to
937 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
938 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
939 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
940 // The marker relocation always comes first, and has the same
941 // symbol as the reloc on the insn setting up the __tls_get_addr
942 // argument. This ties the arg setup insn with the call insn,
943 // allowing ld to safely optimize away the call. We check that
944 // every call to __tls_get_addr has a marker relocation, and that
945 // every marker relocation is on a call to __tls_get_addr.
946 Tls_get_addr tls_get_addr_
;
947 // Info about the last reloc for error message.
948 const Relocate_info
<size
, big_endian
>* relinfo_
;
953 // The class which scans relocations.
954 class Scan
: protected Track_tls
957 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
960 : Track_tls(), issued_non_pic_error_(false)
964 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
967 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
968 Sized_relobj_file
<size
, big_endian
>* object
,
969 unsigned int data_shndx
,
970 Output_section
* output_section
,
971 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
972 const elfcpp::Sym
<size
, big_endian
>& lsym
,
976 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
977 Sized_relobj_file
<size
, big_endian
>* object
,
978 unsigned int data_shndx
,
979 Output_section
* output_section
,
980 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
984 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
986 Sized_relobj_file
<size
, big_endian
>* relobj
,
989 const elfcpp::Rela
<size
, big_endian
>& ,
991 const elfcpp::Sym
<size
, big_endian
>&)
993 // PowerPC64 .opd is not folded, so any identical function text
994 // may be folded and we'll still keep function addresses distinct.
995 // That means no reloc is of concern here.
998 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
999 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1000 if (ppcobj
->abiversion() == 1)
1003 // For 32-bit and ELFv2, conservatively assume anything but calls to
1004 // function code might be taking the address of the function.
1005 return !is_branch_reloc(r_type
);
1009 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1011 Sized_relobj_file
<size
, big_endian
>* relobj
,
1014 const elfcpp::Rela
<size
, big_endian
>& ,
1015 unsigned int r_type
,
1021 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1022 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1023 if (ppcobj
->abiversion() == 1)
1026 return !is_branch_reloc(r_type
);
1030 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1031 Sized_relobj_file
<size
, big_endian
>* object
,
1032 unsigned int r_type
, bool report_err
);
1036 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1037 unsigned int r_type
);
1040 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1041 unsigned int r_type
, Symbol
*);
1044 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1045 Target_powerpc
* target
);
1048 check_non_pic(Relobj
*, unsigned int r_type
);
1050 // Whether we have issued an error about a non-PIC compilation.
1051 bool issued_non_pic_error_
;
1055 symval_for_branch(const Symbol_table
* symtab
,
1056 const Sized_symbol
<size
>* gsym
,
1057 Powerpc_relobj
<size
, big_endian
>* object
,
1058 Address
*value
, unsigned int *dest_shndx
);
1060 // The class which implements relocation.
1061 class Relocate
: protected Track_tls
1064 // Use 'at' branch hints when true, 'y' when false.
1065 // FIXME maybe: set this with an option.
1066 static const bool is_isa_v2
= true;
1072 // Do a relocation. Return false if the caller should not issue
1073 // any warnings about this relocation.
1075 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
1076 Output_section
*, size_t relnum
,
1077 const elfcpp::Rela
<size
, big_endian
>&,
1078 unsigned int r_type
, const Sized_symbol
<size
>*,
1079 const Symbol_value
<size
>*,
1081 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1085 class Relocate_comdat_behavior
1088 // Decide what the linker should do for relocations that refer to
1089 // discarded comdat sections.
1090 inline Comdat_behavior
1091 get(const char* name
)
1093 gold::Default_comdat_behavior default_behavior
;
1094 Comdat_behavior ret
= default_behavior
.get(name
);
1095 if (ret
== CB_WARNING
)
1098 && (strcmp(name
, ".fixup") == 0
1099 || strcmp(name
, ".got2") == 0))
1102 && (strcmp(name
, ".opd") == 0
1103 || strcmp(name
, ".toc") == 0
1104 || strcmp(name
, ".toc1") == 0))
1111 // A class which returns the size required for a relocation type,
1112 // used while scanning relocs during a relocatable link.
1113 class Relocatable_size_for_reloc
1117 get_size_for_reloc(unsigned int, Relobj
*)
1124 // Optimize the TLS relocation type based on what we know about the
1125 // symbol. IS_FINAL is true if the final address of this symbol is
1126 // known at link time.
1128 tls::Tls_optimization
1129 optimize_tls_gd(bool is_final
)
1131 // If we are generating a shared library, then we can't do anything
1133 if (parameters
->options().shared())
1134 return tls::TLSOPT_NONE
;
1137 return tls::TLSOPT_TO_IE
;
1138 return tls::TLSOPT_TO_LE
;
1141 tls::Tls_optimization
1144 if (parameters
->options().shared())
1145 return tls::TLSOPT_NONE
;
1147 return tls::TLSOPT_TO_LE
;
1150 tls::Tls_optimization
1151 optimize_tls_ie(bool is_final
)
1153 if (!is_final
|| parameters
->options().shared())
1154 return tls::TLSOPT_NONE
;
1156 return tls::TLSOPT_TO_LE
;
1161 make_glink_section(Layout
*);
1163 // Create the PLT section.
1165 make_plt_section(Symbol_table
*, Layout
*);
1168 make_iplt_section(Symbol_table
*, Layout
*);
1171 make_brlt_section(Layout
*);
1173 // Create a PLT entry for a global symbol.
1175 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1177 // Create a PLT entry for a local IFUNC symbol.
1179 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1180 Sized_relobj_file
<size
, big_endian
>*,
1184 // Create a GOT entry for local dynamic __tls_get_addr.
1186 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1187 Sized_relobj_file
<size
, big_endian
>* object
);
1190 tlsld_got_offset() const
1192 return this->tlsld_got_offset_
;
1195 // Get the dynamic reloc section, creating it if necessary.
1197 rela_dyn_section(Layout
*);
1199 // Similarly, but for ifunc symbols get the one for ifunc.
1201 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1203 // Copy a relocation against a global symbol.
1205 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1206 Sized_relobj_file
<size
, big_endian
>* object
,
1207 unsigned int shndx
, Output_section
* output_section
,
1208 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1210 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1211 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1212 symtab
->get_sized_symbol
<size
>(sym
),
1213 object
, shndx
, output_section
,
1214 r_type
, reloc
.get_r_offset(),
1215 reloc
.get_r_addend(),
1216 this->rela_dyn_section(layout
));
1219 // Look over all the input sections, deciding where to place stubs.
1221 group_sections(Layout
*, const Task
*, bool);
1223 // Sort output sections by address.
1224 struct Sort_sections
1227 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1228 { return sec1
->address() < sec2
->address(); }
1234 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1235 unsigned int data_shndx
,
1237 unsigned int r_type
,
1240 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1241 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1247 // If this branch needs a plt call stub, or a long branch stub, make one.
1249 make_stub(Stub_table
<size
, big_endian
>*,
1250 Stub_table
<size
, big_endian
>*,
1251 Symbol_table
*) const;
1254 // The branch location..
1255 Powerpc_relobj
<size
, big_endian
>* object_
;
1256 unsigned int shndx_
;
1258 // ..and the branch type and destination.
1259 unsigned int r_type_
;
1260 unsigned int r_sym_
;
1264 // Information about this specific target which we pass to the
1265 // general Target structure.
1266 static Target::Target_info powerpc_info
;
1268 // The types of GOT entries needed for this platform.
1269 // These values are exposed to the ABI in an incremental link.
1270 // Do not renumber existing values without changing the version
1271 // number of the .gnu_incremental_inputs section.
1275 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1276 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1277 GOT_TYPE_TPREL
// entry for @got@tprel
1281 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1282 // The PLT section. This is a container for a table of addresses,
1283 // and their relocations. Each address in the PLT has a dynamic
1284 // relocation (R_*_JMP_SLOT) and each address will have a
1285 // corresponding entry in .glink for lazy resolution of the PLT.
1286 // ppc32 initialises the PLT to point at the .glink entry, while
1287 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1288 // linker adds a stub that loads the PLT entry into ctr then
1289 // branches to ctr. There may be more than one stub for each PLT
1290 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1291 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1292 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1293 // The IPLT section. Like plt_, this is a container for a table of
1294 // addresses and their relocations, specifically for STT_GNU_IFUNC
1295 // functions that resolve locally (STT_GNU_IFUNC functions that
1296 // don't resolve locally go in PLT). Unlike plt_, these have no
1297 // entry in .glink for lazy resolution, and the relocation section
1298 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1299 // the relocation section may contain relocations against
1300 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1301 // relocation section will appear at the end of other dynamic
1302 // relocations, so that ld.so applies these relocations after other
1303 // dynamic relocations. In a static executable, the relocation
1304 // section is emitted and marked with __rela_iplt_start and
1305 // __rela_iplt_end symbols.
1306 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1307 // Section holding long branch destinations.
1308 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1309 // The .glink section.
1310 Output_data_glink
<size
, big_endian
>* glink_
;
1311 // The dynamic reloc section.
1312 Reloc_section
* rela_dyn_
;
1313 // Relocs saved to avoid a COPY reloc.
1314 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1315 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1316 unsigned int tlsld_got_offset_
;
1318 Stub_tables stub_tables_
;
1319 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1320 Branch_lookup_table branch_lookup_table_
;
1322 typedef std::vector
<Branch_info
> Branches
;
1323 Branches branch_info_
;
1325 bool plt_thread_safe_
;
1328 int relax_fail_count_
;
1329 int32_t stub_group_size_
;
1331 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1335 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1338 true, // is_big_endian
1339 elfcpp::EM_PPC
, // machine_code
1340 false, // has_make_symbol
1341 false, // has_resolve
1342 false, // has_code_fill
1343 true, // is_default_stack_executable
1344 false, // can_icf_inline_merge_sections
1346 "/usr/lib/ld.so.1", // dynamic_linker
1347 0x10000000, // default_text_segment_address
1348 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1349 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1350 false, // isolate_execinstr
1352 elfcpp::SHN_UNDEF
, // small_common_shndx
1353 elfcpp::SHN_UNDEF
, // large_common_shndx
1354 0, // small_common_section_flags
1355 0, // large_common_section_flags
1356 NULL
, // attributes_section
1357 NULL
, // attributes_vendor
1358 "_start", // entry_symbol_name
1359 32, // hash_entry_size
1363 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1366 false, // is_big_endian
1367 elfcpp::EM_PPC
, // machine_code
1368 false, // has_make_symbol
1369 false, // has_resolve
1370 false, // has_code_fill
1371 true, // is_default_stack_executable
1372 false, // can_icf_inline_merge_sections
1374 "/usr/lib/ld.so.1", // dynamic_linker
1375 0x10000000, // default_text_segment_address
1376 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1377 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1378 false, // isolate_execinstr
1380 elfcpp::SHN_UNDEF
, // small_common_shndx
1381 elfcpp::SHN_UNDEF
, // large_common_shndx
1382 0, // small_common_section_flags
1383 0, // large_common_section_flags
1384 NULL
, // attributes_section
1385 NULL
, // attributes_vendor
1386 "_start", // entry_symbol_name
1387 32, // hash_entry_size
1391 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1394 true, // is_big_endian
1395 elfcpp::EM_PPC64
, // machine_code
1396 false, // has_make_symbol
1397 false, // has_resolve
1398 false, // has_code_fill
1399 true, // is_default_stack_executable
1400 false, // can_icf_inline_merge_sections
1402 "/usr/lib/ld.so.1", // dynamic_linker
1403 0x10000000, // default_text_segment_address
1404 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1405 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1406 false, // isolate_execinstr
1408 elfcpp::SHN_UNDEF
, // small_common_shndx
1409 elfcpp::SHN_UNDEF
, // large_common_shndx
1410 0, // small_common_section_flags
1411 0, // large_common_section_flags
1412 NULL
, // attributes_section
1413 NULL
, // attributes_vendor
1414 "_start", // entry_symbol_name
1415 32, // hash_entry_size
1419 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1422 false, // is_big_endian
1423 elfcpp::EM_PPC64
, // machine_code
1424 false, // has_make_symbol
1425 false, // has_resolve
1426 false, // has_code_fill
1427 true, // is_default_stack_executable
1428 false, // can_icf_inline_merge_sections
1430 "/usr/lib/ld.so.1", // dynamic_linker
1431 0x10000000, // default_text_segment_address
1432 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1433 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1434 false, // isolate_execinstr
1436 elfcpp::SHN_UNDEF
, // small_common_shndx
1437 elfcpp::SHN_UNDEF
, // large_common_shndx
1438 0, // small_common_section_flags
1439 0, // large_common_section_flags
1440 NULL
, // attributes_section
1441 NULL
, // attributes_vendor
1442 "_start", // entry_symbol_name
1443 32, // hash_entry_size
1447 is_branch_reloc(unsigned int r_type
)
1449 return (r_type
== elfcpp::R_POWERPC_REL24
1450 || r_type
== elfcpp::R_PPC_PLTREL24
1451 || r_type
== elfcpp::R_PPC_LOCAL24PC
1452 || r_type
== elfcpp::R_POWERPC_REL14
1453 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1454 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1455 || r_type
== elfcpp::R_POWERPC_ADDR24
1456 || r_type
== elfcpp::R_POWERPC_ADDR14
1457 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1458 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1461 // If INSN is an opcode that may be used with an @tls operand, return
1462 // the transformed insn for TLS optimisation, otherwise return 0. If
1463 // REG is non-zero only match an insn with RB or RA equal to REG.
1465 at_tls_transform(uint32_t insn
, unsigned int reg
)
1467 if ((insn
& (0x3f << 26)) != 31 << 26)
1471 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1472 rtra
= insn
& ((1 << 26) - (1 << 16));
1473 else if (((insn
>> 16) & 0x1f) == reg
)
1474 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1478 if ((insn
& (0x3ff << 1)) == 266 << 1)
1481 else if ((insn
& (0x1f << 1)) == 23 << 1
1482 && ((insn
& (0x1f << 6)) < 14 << 6
1483 || ((insn
& (0x1f << 6)) >= 16 << 6
1484 && (insn
& (0x1f << 6)) < 24 << 6)))
1485 // load and store indexed -> dform
1486 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1487 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1488 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1489 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1490 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1492 insn
= (58 << 26) | 2;
1500 template<int size
, bool big_endian
>
1501 class Powerpc_relocate_functions
1521 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1522 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1523 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1525 template<int valsize
>
1527 has_overflow_signed(Address value
)
1529 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1530 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1531 limit
<<= ((valsize
- 1) >> 1);
1532 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1533 return value
+ limit
> (limit
<< 1) - 1;
1536 template<int valsize
>
1538 has_overflow_unsigned(Address value
)
1540 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1541 limit
<<= ((valsize
- 1) >> 1);
1542 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1543 return value
> (limit
<< 1) - 1;
1546 template<int valsize
>
1548 has_overflow_bitfield(Address value
)
1550 return (has_overflow_unsigned
<valsize
>(value
)
1551 && has_overflow_signed
<valsize
>(value
));
1554 template<int valsize
>
1555 static inline Status
1556 overflowed(Address value
, Overflow_check overflow
)
1558 if (overflow
== CHECK_SIGNED
)
1560 if (has_overflow_signed
<valsize
>(value
))
1561 return STATUS_OVERFLOW
;
1563 else if (overflow
== CHECK_UNSIGNED
)
1565 if (has_overflow_unsigned
<valsize
>(value
))
1566 return STATUS_OVERFLOW
;
1568 else if (overflow
== CHECK_BITFIELD
)
1570 if (has_overflow_bitfield
<valsize
>(value
))
1571 return STATUS_OVERFLOW
;
1576 // Do a simple RELA relocation
1577 template<int fieldsize
, int valsize
>
1578 static inline Status
1579 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1581 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1582 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1583 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1584 return overflowed
<valsize
>(value
, overflow
);
1587 template<int fieldsize
, int valsize
>
1588 static inline Status
1589 rela(unsigned char* view
,
1590 unsigned int right_shift
,
1591 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1593 Overflow_check overflow
)
1595 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1596 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1597 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1598 Valtype reloc
= value
>> right_shift
;
1601 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1602 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1605 // Do a simple RELA relocation, unaligned.
1606 template<int fieldsize
, int valsize
>
1607 static inline Status
1608 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1610 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1611 return overflowed
<valsize
>(value
, overflow
);
1614 template<int fieldsize
, int valsize
>
1615 static inline Status
1616 rela_ua(unsigned char* view
,
1617 unsigned int right_shift
,
1618 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1620 Overflow_check overflow
)
1622 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1624 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1625 Valtype reloc
= value
>> right_shift
;
1628 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1629 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1633 // R_PPC64_ADDR64: (Symbol + Addend)
1635 addr64(unsigned char* view
, Address value
)
1636 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1638 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1640 addr64_u(unsigned char* view
, Address value
)
1641 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1643 // R_POWERPC_ADDR32: (Symbol + Addend)
1644 static inline Status
1645 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1646 { return This::template rela
<32,32>(view
, value
, overflow
); }
1648 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1649 static inline Status
1650 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1651 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1653 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1654 static inline Status
1655 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1657 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1659 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1660 stat
= STATUS_OVERFLOW
;
1664 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1665 static inline Status
1666 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1667 { return This::template rela
<16,16>(view
, value
, overflow
); }
1669 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1670 static inline Status
1671 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1672 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1674 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1675 static inline Status
1676 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1678 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1679 if ((value
& 3) != 0)
1680 stat
= STATUS_OVERFLOW
;
1684 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1685 static inline Status
1686 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1688 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1689 if ((value
& 15) != 0)
1690 stat
= STATUS_OVERFLOW
;
1694 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1696 addr16_hi(unsigned char* view
, Address value
)
1697 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1699 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1701 addr16_ha(unsigned char* view
, Address value
)
1702 { This::addr16_hi(view
, value
+ 0x8000); }
1704 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1706 addr16_hi2(unsigned char* view
, Address value
)
1707 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1709 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1711 addr16_ha2(unsigned char* view
, Address value
)
1712 { This::addr16_hi2(view
, value
+ 0x8000); }
1714 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1716 addr16_hi3(unsigned char* view
, Address value
)
1717 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1719 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1721 addr16_ha3(unsigned char* view
, Address value
)
1722 { This::addr16_hi3(view
, value
+ 0x8000); }
1724 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1725 static inline Status
1726 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1728 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1729 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1730 stat
= STATUS_OVERFLOW
;
1734 // R_POWERPC_REL16DX_HA
1735 static inline Status
1736 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
1738 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
1739 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1740 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
1742 value
= static_cast<SignedAddress
>(value
) >> 16;
1743 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
1744 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
1745 return overflowed
<16>(value
, overflow
);
1749 // Set ABI version for input and output.
1751 template<int size
, bool big_endian
>
1753 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1755 this->e_flags_
|= ver
;
1756 if (this->abiversion() != 0)
1758 Target_powerpc
<size
, big_endian
>* target
=
1759 static_cast<Target_powerpc
<size
, big_endian
>*>(
1760 parameters
->sized_target
<size
, big_endian
>());
1761 if (target
->abiversion() == 0)
1762 target
->set_abiversion(this->abiversion());
1763 else if (target
->abiversion() != this->abiversion())
1764 gold_error(_("%s: ABI version %d is not compatible "
1765 "with ABI version %d output"),
1766 this->name().c_str(),
1767 this->abiversion(), target
->abiversion());
1772 // Stash away the index of .got2 or .opd in a relocatable object, if
1773 // such a section exists.
1775 template<int size
, bool big_endian
>
1777 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1778 Read_symbols_data
* sd
)
1780 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1781 const unsigned char* namesu
= sd
->section_names
->data();
1782 const char* names
= reinterpret_cast<const char*>(namesu
);
1783 section_size_type names_size
= sd
->section_names_size
;
1784 const unsigned char* s
;
1786 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1787 size
== 32 ? ".got2" : ".opd",
1788 names
, names_size
, NULL
);
1791 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1792 this->special_
= ndx
;
1795 if (this->abiversion() == 0)
1796 this->set_abiversion(1);
1797 else if (this->abiversion() > 1)
1798 gold_error(_("%s: .opd invalid in abiv%d"),
1799 this->name().c_str(), this->abiversion());
1802 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1805 // Examine .rela.opd to build info about function entry points.
1807 template<int size
, bool big_endian
>
1809 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1811 const unsigned char* prelocs
,
1812 const unsigned char* plocal_syms
)
1816 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1818 const int reloc_size
1819 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1820 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1821 Address expected_off
= 0;
1822 bool regular
= true;
1823 unsigned int opd_ent_size
= 0;
1825 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1827 Reltype
reloc(prelocs
);
1828 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1829 = reloc
.get_r_info();
1830 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1831 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1833 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1834 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1837 if (r_sym
< this->local_symbol_count())
1839 typename
elfcpp::Sym
<size
, big_endian
>
1840 lsym(plocal_syms
+ r_sym
* sym_size
);
1841 shndx
= lsym
.get_st_shndx();
1842 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1843 value
= lsym
.get_st_value();
1846 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1848 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1849 value
+ reloc
.get_r_addend());
1852 expected_off
= reloc
.get_r_offset();
1853 opd_ent_size
= expected_off
;
1855 else if (expected_off
!= reloc
.get_r_offset())
1857 expected_off
+= opd_ent_size
;
1859 else if (r_type
== elfcpp::R_PPC64_TOC
)
1861 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1866 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1867 this->name().c_str(), r_type
);
1871 if (reloc_count
<= 2)
1872 opd_ent_size
= this->section_size(this->opd_shndx());
1873 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1877 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1878 this->name().c_str());
1884 template<int size
, bool big_endian
>
1886 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1888 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1891 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1892 p
!= rd
->relocs
.end();
1895 if (p
->data_shndx
== this->opd_shndx())
1897 uint64_t opd_size
= this->section_size(this->opd_shndx());
1898 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1901 this->init_opd(opd_size
);
1902 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1903 rd
->local_symbols
->data());
1911 // Read the symbols then set up st_other vector.
1913 template<int size
, bool big_endian
>
1915 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1917 this->base_read_symbols(sd
);
1920 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1921 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1922 const unsigned int loccount
= this->do_local_symbol_count();
1925 this->st_other_
.resize(loccount
);
1926 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1927 off_t locsize
= loccount
* sym_size
;
1928 const unsigned int symtab_shndx
= this->symtab_shndx();
1929 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1930 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1931 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1932 locsize
, true, false);
1934 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1936 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1937 unsigned char st_other
= sym
.get_st_other();
1938 this->st_other_
[i
] = st_other
;
1939 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1941 if (this->abiversion() == 0)
1942 this->set_abiversion(2);
1943 else if (this->abiversion() < 2)
1944 gold_error(_("%s: local symbol %d has invalid st_other"
1945 " for ABI version 1"),
1946 this->name().c_str(), i
);
1953 template<int size
, bool big_endian
>
1955 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1957 this->e_flags_
|= ver
;
1958 if (this->abiversion() != 0)
1960 Target_powerpc
<size
, big_endian
>* target
=
1961 static_cast<Target_powerpc
<size
, big_endian
>*>(
1962 parameters
->sized_target
<size
, big_endian
>());
1963 if (target
->abiversion() == 0)
1964 target
->set_abiversion(this->abiversion());
1965 else if (target
->abiversion() != this->abiversion())
1966 gold_error(_("%s: ABI version %d is not compatible "
1967 "with ABI version %d output"),
1968 this->name().c_str(),
1969 this->abiversion(), target
->abiversion());
1974 // Call Sized_dynobj::base_read_symbols to read the symbols then
1975 // read .opd from a dynamic object, filling in opd_ent_ vector,
1977 template<int size
, bool big_endian
>
1979 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1981 this->base_read_symbols(sd
);
1984 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1985 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1986 const unsigned char* namesu
= sd
->section_names
->data();
1987 const char* names
= reinterpret_cast<const char*>(namesu
);
1988 const unsigned char* s
= NULL
;
1989 const unsigned char* opd
;
1990 section_size_type opd_size
;
1992 // Find and read .opd section.
1995 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1996 sd
->section_names_size
,
2001 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2002 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2003 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2005 if (this->abiversion() == 0)
2006 this->set_abiversion(1);
2007 else if (this->abiversion() > 1)
2008 gold_error(_("%s: .opd invalid in abiv%d"),
2009 this->name().c_str(), this->abiversion());
2011 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2012 this->opd_address_
= shdr
.get_sh_addr();
2013 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2014 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2020 // Build set of executable sections.
2021 // Using a set is probably overkill. There is likely to be only
2022 // a few executable sections, typically .init, .text and .fini,
2023 // and they are generally grouped together.
2024 typedef std::set
<Sec_info
> Exec_sections
;
2025 Exec_sections exec_sections
;
2027 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2029 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2030 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2031 && ((shdr
.get_sh_flags()
2032 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2033 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2034 && shdr
.get_sh_size() != 0)
2036 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2037 shdr
.get_sh_size(), i
));
2040 if (exec_sections
.empty())
2043 // Look over the OPD entries. This is complicated by the fact
2044 // that some binaries will use two-word entries while others
2045 // will use the standard three-word entries. In most cases
2046 // the third word (the environment pointer for languages like
2047 // Pascal) is unused and will be zero. If the third word is
2048 // used it should not be pointing into executable sections,
2050 this->init_opd(opd_size
);
2051 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2053 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2054 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2055 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2057 // Chances are that this is the third word of an OPD entry.
2059 typename
Exec_sections::const_iterator e
2060 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2061 if (e
!= exec_sections
.begin())
2064 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2066 // We have an address in an executable section.
2067 // VAL ought to be the function entry, set it up.
2068 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2069 // Skip second word of OPD entry, the TOC pointer.
2073 // If we didn't match any executable sections, we likely
2074 // have a non-zero third word in the OPD entry.
2079 // Set up some symbols.
2081 template<int size
, bool big_endian
>
2083 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2084 Symbol_table
* symtab
,
2089 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2090 // undefined when scanning relocs (and thus requires
2091 // non-relative dynamic relocs). The proper value will be
2093 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2094 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2096 Target_powerpc
<size
, big_endian
>* target
=
2097 static_cast<Target_powerpc
<size
, big_endian
>*>(
2098 parameters
->sized_target
<size
, big_endian
>());
2099 Output_data_got_powerpc
<size
, big_endian
>* got
2100 = target
->got_section(symtab
, layout
);
2101 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2102 Symbol_table::PREDEFINED
,
2106 elfcpp::STV_HIDDEN
, 0,
2110 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2111 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2112 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2114 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2116 = layout
->add_output_section_data(".sdata", 0,
2118 | elfcpp::SHF_WRITE
,
2119 sdata
, ORDER_SMALL_DATA
, false);
2120 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2121 Symbol_table::PREDEFINED
,
2122 os
, 32768, 0, elfcpp::STT_OBJECT
,
2123 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2129 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2130 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2131 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2133 Target_powerpc
<size
, big_endian
>* target
=
2134 static_cast<Target_powerpc
<size
, big_endian
>*>(
2135 parameters
->sized_target
<size
, big_endian
>());
2136 Output_data_got_powerpc
<size
, big_endian
>* got
2137 = target
->got_section(symtab
, layout
);
2138 symtab
->define_in_output_data(".TOC.", NULL
,
2139 Symbol_table::PREDEFINED
,
2143 elfcpp::STV_HIDDEN
, 0,
2149 // Set up PowerPC target specific relobj.
2151 template<int size
, bool big_endian
>
2153 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2154 const std::string
& name
,
2155 Input_file
* input_file
,
2156 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2158 int et
= ehdr
.get_e_type();
2159 // ET_EXEC files are valid input for --just-symbols/-R,
2160 // and we treat them as relocatable objects.
2161 if (et
== elfcpp::ET_REL
2162 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2164 Powerpc_relobj
<size
, big_endian
>* obj
=
2165 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2169 else if (et
== elfcpp::ET_DYN
)
2171 Powerpc_dynobj
<size
, big_endian
>* obj
=
2172 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2178 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2183 template<int size
, bool big_endian
>
2184 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2187 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2188 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2190 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2191 : Output_data_got
<size
, big_endian
>(),
2192 symtab_(symtab
), layout_(layout
),
2193 header_ent_cnt_(size
== 32 ? 3 : 1),
2194 header_index_(size
== 32 ? 0x2000 : 0)
2197 // Override all the Output_data_got methods we use so as to first call
2200 add_global(Symbol
* gsym
, unsigned int got_type
)
2202 this->reserve_ent();
2203 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2207 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2209 this->reserve_ent();
2210 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2214 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2215 { return this->add_global_plt(gsym
, got_type
); }
2218 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2219 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2221 this->reserve_ent();
2222 Output_data_got
<size
, big_endian
>::
2223 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2227 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2228 Output_data_reloc_generic
* rel_dyn
,
2229 unsigned int r_type_1
, unsigned int r_type_2
)
2231 this->reserve_ent(2);
2232 Output_data_got
<size
, big_endian
>::
2233 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2237 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2239 this->reserve_ent();
2240 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2245 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2247 this->reserve_ent();
2248 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2253 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2254 { return this->add_local_plt(object
, sym_index
, got_type
); }
2257 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2258 unsigned int got_type
,
2259 Output_data_reloc_generic
* rel_dyn
,
2260 unsigned int r_type
)
2262 this->reserve_ent(2);
2263 Output_data_got
<size
, big_endian
>::
2264 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2268 add_constant(Valtype constant
)
2270 this->reserve_ent();
2271 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2275 add_constant_pair(Valtype c1
, Valtype c2
)
2277 this->reserve_ent(2);
2278 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2281 // Offset of _GLOBAL_OFFSET_TABLE_.
2285 return this->got_offset(this->header_index_
);
2288 // Offset of base used to access the GOT/TOC.
2289 // The got/toc pointer reg will be set to this value.
2291 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2294 return this->g_o_t();
2296 return (this->output_section()->address()
2297 + object
->toc_base_offset()
2301 // Ensure our GOT has a header.
2303 set_final_data_size()
2305 if (this->header_ent_cnt_
!= 0)
2306 this->make_header();
2307 Output_data_got
<size
, big_endian
>::set_final_data_size();
2310 // First word of GOT header needs some values that are not
2311 // handled by Output_data_got so poke them in here.
2312 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2314 do_write(Output_file
* of
)
2317 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2318 val
= this->layout_
->dynamic_section()->address();
2320 val
= this->output_section()->address() + 0x8000;
2321 this->replace_constant(this->header_index_
, val
);
2322 Output_data_got
<size
, big_endian
>::do_write(of
);
2327 reserve_ent(unsigned int cnt
= 1)
2329 if (this->header_ent_cnt_
== 0)
2331 if (this->num_entries() + cnt
> this->header_index_
)
2332 this->make_header();
2338 this->header_ent_cnt_
= 0;
2339 this->header_index_
= this->num_entries();
2342 Output_data_got
<size
, big_endian
>::add_constant(0);
2343 Output_data_got
<size
, big_endian
>::add_constant(0);
2344 Output_data_got
<size
, big_endian
>::add_constant(0);
2346 // Define _GLOBAL_OFFSET_TABLE_ at the header
2347 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2350 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2351 sym
->set_value(this->g_o_t());
2354 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2355 Symbol_table::PREDEFINED
,
2356 this, this->g_o_t(), 0,
2359 elfcpp::STV_HIDDEN
, 0,
2363 Output_data_got
<size
, big_endian
>::add_constant(0);
2366 // Stashed pointers.
2367 Symbol_table
* symtab_
;
2371 unsigned int header_ent_cnt_
;
2372 // GOT header index.
2373 unsigned int header_index_
;
2376 // Get the GOT section, creating it if necessary.
2378 template<int size
, bool big_endian
>
2379 Output_data_got_powerpc
<size
, big_endian
>*
2380 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2383 if (this->got_
== NULL
)
2385 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2388 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2390 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2391 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2392 this->got_
, ORDER_DATA
, false);
2398 // Get the dynamic reloc section, creating it if necessary.
2400 template<int size
, bool big_endian
>
2401 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2402 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2404 if (this->rela_dyn_
== NULL
)
2406 gold_assert(layout
!= NULL
);
2407 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2408 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2409 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2410 ORDER_DYNAMIC_RELOCS
, false);
2412 return this->rela_dyn_
;
2415 // Similarly, but for ifunc symbols get the one for ifunc.
2417 template<int size
, bool big_endian
>
2418 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2419 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2424 return this->rela_dyn_section(layout
);
2426 if (this->iplt_
== NULL
)
2427 this->make_iplt_section(symtab
, layout
);
2428 return this->iplt_
->rel_plt();
2434 // Determine the stub group size. The group size is the absolute
2435 // value of the parameter --stub-group-size. If --stub-group-size
2436 // is passed a negative value, we restrict stubs to be always before
2437 // the stubbed branches.
2438 Stub_control(int32_t size
, bool no_size_errors
)
2439 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2440 stub14_group_size_(abs(size
) >> 10),
2441 stubs_always_before_branch_(size
< 0),
2442 suppress_size_errors_(no_size_errors
),
2443 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2447 // Return true iff input section can be handled by current stub
2450 can_add_to_stub_group(Output_section
* o
,
2451 const Output_section::Input_section
* i
,
2454 const Output_section::Input_section
*
2460 { return output_section_
; }
2463 set_output_and_owner(Output_section
* o
,
2464 const Output_section::Input_section
* i
)
2466 this->output_section_
= o
;
2474 FINDING_STUB_SECTION
,
2479 uint32_t stub_group_size_
;
2480 uint32_t stub14_group_size_
;
2481 bool stubs_always_before_branch_
;
2482 bool suppress_size_errors_
;
2483 uint64_t group_end_addr_
;
2484 const Output_section::Input_section
* owner_
;
2485 Output_section
* output_section_
;
2488 // Return true iff input section can be handled by current stub
2492 Stub_control::can_add_to_stub_group(Output_section
* o
,
2493 const Output_section::Input_section
* i
,
2497 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2498 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2500 uint64_t start_addr
= o
->address();
2503 // .init and .fini sections are pasted together to form a single
2504 // function. We can't be adding stubs in the middle of the function.
2505 this_size
= o
->data_size();
2508 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2509 this_size
= i
->data_size();
2511 uint64_t end_addr
= start_addr
+ this_size
;
2512 bool toobig
= this_size
> group_size
;
2514 if (toobig
&& !this->suppress_size_errors_
)
2515 gold_warning(_("%s:%s exceeds group size"),
2516 i
->relobj()->name().c_str(),
2517 i
->relobj()->section_name(i
->shndx()).c_str());
2519 if (this->state_
!= HAS_STUB_SECTION
2520 && (!whole_sec
|| this->output_section_
!= o
)
2521 && (this->state_
== NO_GROUP
2522 || this->group_end_addr_
- end_addr
< group_size
))
2525 this->output_section_
= o
;
2528 if (this->state_
== NO_GROUP
)
2530 this->state_
= FINDING_STUB_SECTION
;
2531 this->group_end_addr_
= end_addr
;
2533 else if (this->group_end_addr_
- start_addr
< group_size
)
2535 // Adding this section would make the group larger than GROUP_SIZE.
2536 else if (this->state_
== FINDING_STUB_SECTION
2537 && !this->stubs_always_before_branch_
2540 // But wait, there's more! Input sections up to GROUP_SIZE
2541 // bytes before the stub table can be handled by it too.
2542 this->state_
= HAS_STUB_SECTION
;
2543 this->group_end_addr_
= end_addr
;
2547 this->state_
= NO_GROUP
;
2553 // Look over all the input sections, deciding where to place stubs.
2555 template<int size
, bool big_endian
>
2557 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2559 bool no_size_errors
)
2561 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
);
2563 // Group input sections and insert stub table
2564 Stub_table_owner
* table_owner
= NULL
;
2565 std::vector
<Stub_table_owner
*> tables
;
2566 Layout::Section_list section_list
;
2567 layout
->get_executable_sections(§ion_list
);
2568 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2569 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2570 o
!= section_list
.rend();
2573 typedef Output_section::Input_section_list Input_section_list
;
2574 for (Input_section_list::const_reverse_iterator i
2575 = (*o
)->input_sections().rbegin();
2576 i
!= (*o
)->input_sections().rend();
2579 if (i
->is_input_section()
2580 || i
->is_relaxed_input_section())
2582 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2583 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2584 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2585 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2587 table_owner
->output_section
= stub_control
.output_section();
2588 table_owner
->owner
= stub_control
.owner();
2589 stub_control
.set_output_and_owner(*o
, &*i
);
2592 if (table_owner
== NULL
)
2594 table_owner
= new Stub_table_owner
;
2595 tables
.push_back(table_owner
);
2597 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2601 if (table_owner
!= NULL
)
2603 const Output_section::Input_section
* i
= stub_control
.owner();
2605 if (tables
.size() >= 2 && tables
[tables
.size() - 2]->owner
== i
)
2607 // Corner case. A new stub group was made for the first
2608 // section (last one looked at here) for some reason, but
2609 // the first section is already being used as the owner for
2610 // a stub table for following sections. Force it into that
2614 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2615 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2616 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2620 table_owner
->output_section
= stub_control
.output_section();
2621 table_owner
->owner
= i
;
2624 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2628 Stub_table
<size
, big_endian
>* stub_table
;
2630 if ((*t
)->owner
->is_input_section())
2631 stub_table
= new Stub_table
<size
, big_endian
>(this,
2632 (*t
)->output_section
,
2634 else if ((*t
)->owner
->is_relaxed_input_section())
2635 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2636 (*t
)->owner
->relaxed_input_section());
2639 this->stub_tables_
.push_back(stub_table
);
2644 static unsigned long
2645 max_branch_delta (unsigned int r_type
)
2647 if (r_type
== elfcpp::R_POWERPC_REL14
2648 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2649 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2651 if (r_type
== elfcpp::R_POWERPC_REL24
2652 || r_type
== elfcpp::R_PPC_PLTREL24
2653 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2658 // If this branch needs a plt call stub, or a long branch stub, make one.
2660 template<int size
, bool big_endian
>
2662 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2663 Stub_table
<size
, big_endian
>* stub_table
,
2664 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2665 Symbol_table
* symtab
) const
2667 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2668 if (sym
!= NULL
&& sym
->is_forwarder())
2669 sym
= symtab
->resolve_forwards(sym
);
2670 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2671 Target_powerpc
<size
, big_endian
>* target
=
2672 static_cast<Target_powerpc
<size
, big_endian
>*>(
2673 parameters
->sized_target
<size
, big_endian
>());
2675 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2676 : this->object_
->local_has_plt_offset(this->r_sym_
))
2680 && target
->abiversion() >= 2
2681 && !parameters
->options().output_is_position_independent()
2682 && !is_branch_reloc(this->r_type_
))
2683 target
->glink_section()->add_global_entry(gsym
);
2686 if (stub_table
== NULL
)
2687 stub_table
= this->object_
->stub_table(this->shndx_
);
2688 if (stub_table
== NULL
)
2690 // This is a ref from a data section to an ifunc symbol.
2691 stub_table
= ifunc_stub_table
;
2693 gold_assert(stub_table
!= NULL
);
2694 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2695 if (from
!= invalid_address
)
2696 from
+= (this->object_
->output_section(this->shndx_
)->address()
2699 return stub_table
->add_plt_call_entry(from
,
2700 this->object_
, gsym
,
2701 this->r_type_
, this->addend_
);
2703 return stub_table
->add_plt_call_entry(from
,
2704 this->object_
, this->r_sym_
,
2705 this->r_type_
, this->addend_
);
2710 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2711 if (max_branch_offset
== 0)
2713 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2714 gold_assert(from
!= invalid_address
);
2715 from
+= (this->object_
->output_section(this->shndx_
)->address()
2720 switch (gsym
->source())
2722 case Symbol::FROM_OBJECT
:
2724 Object
* symobj
= gsym
->object();
2725 if (symobj
->is_dynamic()
2726 || symobj
->pluginobj() != NULL
)
2729 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2730 if (shndx
== elfcpp::SHN_UNDEF
)
2735 case Symbol::IS_UNDEFINED
:
2741 Symbol_table::Compute_final_value_status status
;
2742 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2743 if (status
!= Symbol_table::CFVS_OK
)
2746 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2750 const Symbol_value
<size
>* psymval
2751 = this->object_
->local_symbol(this->r_sym_
);
2752 Symbol_value
<size
> symval
;
2753 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2754 typename
ObjType::Compute_final_local_value_status status
2755 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2757 if (status
!= ObjType::CFLV_OK
2758 || !symval
.has_output_value())
2760 to
= symval
.value(this->object_
, 0);
2762 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2764 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2765 to
+= this->addend_
;
2766 if (stub_table
== NULL
)
2767 stub_table
= this->object_
->stub_table(this->shndx_
);
2768 if (size
== 64 && target
->abiversion() < 2)
2770 unsigned int dest_shndx
;
2771 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2775 Address delta
= to
- from
;
2776 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2778 if (stub_table
== NULL
)
2780 gold_warning(_("%s:%s: branch in non-executable section,"
2781 " no long branch stub for you"),
2782 this->object_
->name().c_str(),
2783 this->object_
->section_name(this->shndx_
).c_str());
2786 bool save_res
= (size
== 64
2788 && gsym
->source() == Symbol::IN_OUTPUT_DATA
2789 && gsym
->output_data() == target
->savres_section());
2790 return stub_table
->add_long_branch_entry(this->object_
,
2792 from
, to
, save_res
);
2798 // Relaxation hook. This is where we do stub generation.
2800 template<int size
, bool big_endian
>
2802 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2803 const Input_objects
*,
2804 Symbol_table
* symtab
,
2808 unsigned int prev_brlt_size
= 0;
2812 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
2814 && this->abiversion() < 2
2816 && !parameters
->options().user_set_plt_thread_safe())
2818 static const char* const thread_starter
[] =
2822 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2824 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2825 "mq_notify", "create_timer",
2830 "GOMP_parallel_start",
2831 "GOMP_parallel_loop_static",
2832 "GOMP_parallel_loop_static_start",
2833 "GOMP_parallel_loop_dynamic",
2834 "GOMP_parallel_loop_dynamic_start",
2835 "GOMP_parallel_loop_guided",
2836 "GOMP_parallel_loop_guided_start",
2837 "GOMP_parallel_loop_runtime",
2838 "GOMP_parallel_loop_runtime_start",
2839 "GOMP_parallel_sections",
2840 "GOMP_parallel_sections_start",
2845 if (parameters
->options().shared())
2849 for (unsigned int i
= 0;
2850 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2853 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2854 thread_safe
= (sym
!= NULL
2856 && sym
->in_real_elf());
2862 this->plt_thread_safe_
= thread_safe
;
2867 this->stub_group_size_
= parameters
->options().stub_group_size();
2868 bool no_size_errors
= true;
2869 if (this->stub_group_size_
== 1)
2870 this->stub_group_size_
= 0x1c00000;
2871 else if (this->stub_group_size_
== -1)
2872 this->stub_group_size_
= -0x1e00000;
2874 no_size_errors
= false;
2875 this->group_sections(layout
, task
, no_size_errors
);
2877 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
2879 this->branch_lookup_table_
.clear();
2880 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2881 p
!= this->stub_tables_
.end();
2884 (*p
)->clear_stubs(true);
2886 this->stub_tables_
.clear();
2887 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
2888 gold_info(_("%s: stub group size is too large; retrying with %d"),
2889 program_name
, this->stub_group_size_
);
2890 this->group_sections(layout
, task
, true);
2893 // We need address of stub tables valid for make_stub.
2894 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2895 p
!= this->stub_tables_
.end();
2898 const Powerpc_relobj
<size
, big_endian
>* object
2899 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2900 Address off
= object
->get_output_section_offset((*p
)->shndx());
2901 gold_assert(off
!= invalid_address
);
2902 Output_section
* os
= (*p
)->output_section();
2903 (*p
)->set_address_and_size(os
, off
);
2908 // Clear plt call stubs, long branch stubs and branch lookup table.
2909 prev_brlt_size
= this->branch_lookup_table_
.size();
2910 this->branch_lookup_table_
.clear();
2911 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2912 p
!= this->stub_tables_
.end();
2915 (*p
)->clear_stubs(false);
2919 // Build all the stubs.
2920 this->relax_failed_
= false;
2921 Stub_table
<size
, big_endian
>* ifunc_stub_table
2922 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2923 Stub_table
<size
, big_endian
>* one_stub_table
2924 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2925 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2926 b
!= this->branch_info_
.end();
2929 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
2930 && !this->relax_failed_
)
2932 this->relax_failed_
= true;
2933 this->relax_fail_count_
++;
2934 if (this->relax_fail_count_
< 3)
2939 // Did anything change size?
2940 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2941 bool again
= num_huge_branches
!= prev_brlt_size
;
2942 if (size
== 64 && num_huge_branches
!= 0)
2943 this->make_brlt_section(layout
);
2944 if (size
== 64 && again
)
2945 this->brlt_section_
->set_current_size(num_huge_branches
);
2947 typedef Unordered_set
<Output_section
*> Output_sections
;
2948 Output_sections os_need_update
;
2949 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2950 p
!= this->stub_tables_
.end();
2953 if ((*p
)->size_update())
2956 (*p
)->add_eh_frame(layout
);
2957 os_need_update
.insert((*p
)->output_section());
2961 // Set output section offsets for all input sections in an output
2962 // section that just changed size. Anything past the stubs will
2964 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2965 p
!= os_need_update
.end();
2968 Output_section
* os
= *p
;
2970 typedef Output_section::Input_section_list Input_section_list
;
2971 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2972 i
!= os
->input_sections().end();
2975 off
= align_address(off
, i
->addralign());
2976 if (i
->is_input_section() || i
->is_relaxed_input_section())
2977 i
->relobj()->set_section_offset(i
->shndx(), off
);
2978 if (i
->is_relaxed_input_section())
2980 Stub_table
<size
, big_endian
>* stub_table
2981 = static_cast<Stub_table
<size
, big_endian
>*>(
2982 i
->relaxed_input_section());
2983 off
+= stub_table
->set_address_and_size(os
, off
);
2986 off
+= i
->data_size();
2988 // If .branch_lt is part of this output section, then we have
2989 // just done the offset adjustment.
2990 os
->clear_section_offsets_need_adjustment();
2995 && num_huge_branches
!= 0
2996 && parameters
->options().output_is_position_independent())
2998 // Fill in the BRLT relocs.
2999 this->brlt_section_
->reset_brlt_sizes();
3000 for (typename
Branch_lookup_table::const_iterator p
3001 = this->branch_lookup_table_
.begin();
3002 p
!= this->branch_lookup_table_
.end();
3005 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3007 this->brlt_section_
->finalize_brlt_sizes();
3012 template<int size
, bool big_endian
>
3014 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3015 unsigned char* oview
,
3019 uint64_t address
= plt
->address();
3020 off_t len
= plt
->data_size();
3022 if (plt
== this->glink_
)
3024 // See Output_data_glink::do_write() for glink contents.
3027 gold_assert(parameters
->doing_static_link());
3028 // Static linking may need stubs, to support ifunc and long
3029 // branches. We need to create an output section for
3030 // .eh_frame early in the link process, to have a place to
3031 // attach stub .eh_frame info. We also need to have
3032 // registered a CIE that matches the stub CIE. Both of
3033 // these requirements are satisfied by creating an FDE and
3034 // CIE for .glink, even though static linking will leave
3035 // .glink zero length.
3036 // ??? Hopefully generating an FDE with a zero address range
3037 // won't confuse anything that consumes .eh_frame info.
3039 else if (size
== 64)
3041 // There is one word before __glink_PLTresolve
3045 else if (parameters
->options().output_is_position_independent())
3047 // There are two FDEs for a position independent glink.
3048 // The first covers the branch table, the second
3049 // __glink_PLTresolve at the end of glink.
3050 off_t resolve_size
= this->glink_
->pltresolve_size
;
3051 if (oview
[9] == elfcpp::DW_CFA_nop
)
3052 len
-= resolve_size
;
3055 address
+= len
- resolve_size
;
3062 // Must be a stub table.
3063 const Stub_table
<size
, big_endian
>* stub_table
3064 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3065 uint64_t stub_address
= stub_table
->stub_address();
3066 len
-= stub_address
- address
;
3067 address
= stub_address
;
3070 *paddress
= address
;
3074 // A class to handle the PLT data.
3076 template<int size
, bool big_endian
>
3077 class Output_data_plt_powerpc
: public Output_section_data_build
3080 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3081 size
, big_endian
> Reloc_section
;
3083 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3084 Reloc_section
* plt_rel
,
3086 : Output_section_data_build(size
== 32 ? 4 : 8),
3092 // Add an entry to the PLT.
3097 add_ifunc_entry(Symbol
*);
3100 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3102 // Return the .rela.plt section data.
3109 // Return the number of PLT entries.
3113 if (this->current_data_size() == 0)
3115 return ((this->current_data_size() - this->first_plt_entry_offset())
3116 / this->plt_entry_size());
3121 do_adjust_output_section(Output_section
* os
)
3126 // Write to a map file.
3128 do_print_to_mapfile(Mapfile
* mapfile
) const
3129 { mapfile
->print_output_data(this, this->name_
); }
3132 // Return the offset of the first non-reserved PLT entry.
3134 first_plt_entry_offset() const
3136 // IPLT has no reserved entry.
3137 if (this->name_
[3] == 'I')
3139 return this->targ_
->first_plt_entry_offset();
3142 // Return the size of each PLT entry.
3144 plt_entry_size() const
3146 return this->targ_
->plt_entry_size();
3149 // Write out the PLT data.
3151 do_write(Output_file
*);
3153 // The reloc section.
3154 Reloc_section
* rel_
;
3155 // Allows access to .glink for do_write.
3156 Target_powerpc
<size
, big_endian
>* targ_
;
3157 // What to report in map file.
3161 // Add an entry to the PLT.
3163 template<int size
, bool big_endian
>
3165 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3167 if (!gsym
->has_plt_offset())
3169 section_size_type off
= this->current_data_size();
3171 off
+= this->first_plt_entry_offset();
3172 gsym
->set_plt_offset(off
);
3173 gsym
->set_needs_dynsym_entry();
3174 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3175 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3176 off
+= this->plt_entry_size();
3177 this->set_current_data_size(off
);
3181 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3183 template<int size
, bool big_endian
>
3185 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3187 if (!gsym
->has_plt_offset())
3189 section_size_type off
= this->current_data_size();
3190 gsym
->set_plt_offset(off
);
3191 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3192 if (size
== 64 && this->targ_
->abiversion() < 2)
3193 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3194 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3195 off
+= this->plt_entry_size();
3196 this->set_current_data_size(off
);
3200 // Add an entry for a local ifunc symbol to the IPLT.
3202 template<int size
, bool big_endian
>
3204 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3205 Sized_relobj_file
<size
, big_endian
>* relobj
,
3206 unsigned int local_sym_index
)
3208 if (!relobj
->local_has_plt_offset(local_sym_index
))
3210 section_size_type off
= this->current_data_size();
3211 relobj
->set_local_plt_offset(local_sym_index
, off
);
3212 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3213 if (size
== 64 && this->targ_
->abiversion() < 2)
3214 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3215 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3217 off
+= this->plt_entry_size();
3218 this->set_current_data_size(off
);
3222 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3223 static const uint32_t add_2_2_11
= 0x7c425a14;
3224 static const uint32_t add_3_3_2
= 0x7c631214;
3225 static const uint32_t add_3_3_13
= 0x7c636a14;
3226 static const uint32_t add_11_0_11
= 0x7d605a14;
3227 static const uint32_t add_11_2_11
= 0x7d625a14;
3228 static const uint32_t add_11_11_2
= 0x7d6b1214;
3229 static const uint32_t addi_0_12
= 0x380c0000;
3230 static const uint32_t addi_2_2
= 0x38420000;
3231 static const uint32_t addi_3_3
= 0x38630000;
3232 static const uint32_t addi_11_11
= 0x396b0000;
3233 static const uint32_t addi_12_1
= 0x39810000;
3234 static const uint32_t addi_12_12
= 0x398c0000;
3235 static const uint32_t addis_0_2
= 0x3c020000;
3236 static const uint32_t addis_0_13
= 0x3c0d0000;
3237 static const uint32_t addis_2_12
= 0x3c4c0000;
3238 static const uint32_t addis_11_2
= 0x3d620000;
3239 static const uint32_t addis_11_11
= 0x3d6b0000;
3240 static const uint32_t addis_11_30
= 0x3d7e0000;
3241 static const uint32_t addis_12_1
= 0x3d810000;
3242 static const uint32_t addis_12_2
= 0x3d820000;
3243 static const uint32_t addis_12_12
= 0x3d8c0000;
3244 static const uint32_t b
= 0x48000000;
3245 static const uint32_t bcl_20_31
= 0x429f0005;
3246 static const uint32_t bctr
= 0x4e800420;
3247 static const uint32_t blr
= 0x4e800020;
3248 static const uint32_t bnectr_p4
= 0x4ce20420;
3249 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3250 static const uint32_t cmpldi_2_0
= 0x28220000;
3251 static const uint32_t cror_15_15_15
= 0x4def7b82;
3252 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3253 static const uint32_t ld_0_1
= 0xe8010000;
3254 static const uint32_t ld_0_12
= 0xe80c0000;
3255 static const uint32_t ld_2_1
= 0xe8410000;
3256 static const uint32_t ld_2_2
= 0xe8420000;
3257 static const uint32_t ld_2_11
= 0xe84b0000;
3258 static const uint32_t ld_11_2
= 0xe9620000;
3259 static const uint32_t ld_11_11
= 0xe96b0000;
3260 static const uint32_t ld_12_2
= 0xe9820000;
3261 static const uint32_t ld_12_11
= 0xe98b0000;
3262 static const uint32_t ld_12_12
= 0xe98c0000;
3263 static const uint32_t lfd_0_1
= 0xc8010000;
3264 static const uint32_t li_0_0
= 0x38000000;
3265 static const uint32_t li_12_0
= 0x39800000;
3266 static const uint32_t lis_0
= 0x3c000000;
3267 static const uint32_t lis_11
= 0x3d600000;
3268 static const uint32_t lis_12
= 0x3d800000;
3269 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3270 static const uint32_t lwz_0_12
= 0x800c0000;
3271 static const uint32_t lwz_11_11
= 0x816b0000;
3272 static const uint32_t lwz_11_30
= 0x817e0000;
3273 static const uint32_t lwz_12_12
= 0x818c0000;
3274 static const uint32_t lwzu_0_12
= 0x840c0000;
3275 static const uint32_t mflr_0
= 0x7c0802a6;
3276 static const uint32_t mflr_11
= 0x7d6802a6;
3277 static const uint32_t mflr_12
= 0x7d8802a6;
3278 static const uint32_t mtctr_0
= 0x7c0903a6;
3279 static const uint32_t mtctr_11
= 0x7d6903a6;
3280 static const uint32_t mtctr_12
= 0x7d8903a6;
3281 static const uint32_t mtlr_0
= 0x7c0803a6;
3282 static const uint32_t mtlr_12
= 0x7d8803a6;
3283 static const uint32_t nop
= 0x60000000;
3284 static const uint32_t ori_0_0_0
= 0x60000000;
3285 static const uint32_t srdi_0_0_2
= 0x7800f082;
3286 static const uint32_t std_0_1
= 0xf8010000;
3287 static const uint32_t std_0_12
= 0xf80c0000;
3288 static const uint32_t std_2_1
= 0xf8410000;
3289 static const uint32_t stfd_0_1
= 0xd8010000;
3290 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3291 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3292 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3293 static const uint32_t xor_2_12_12
= 0x7d826278;
3294 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3296 // Write out the PLT.
3298 template<int size
, bool big_endian
>
3300 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3302 if (size
== 32 && this->name_
[3] != 'I')
3304 const section_size_type offset
= this->offset();
3305 const section_size_type oview_size
3306 = convert_to_section_size_type(this->data_size());
3307 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3308 unsigned char* pov
= oview
;
3309 unsigned char* endpov
= oview
+ oview_size
;
3311 // The address of the .glink branch table
3312 const Output_data_glink
<size
, big_endian
>* glink
3313 = this->targ_
->glink_section();
3314 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3316 while (pov
< endpov
)
3318 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3323 of
->write_output_view(offset
, oview_size
, oview
);
3327 // Create the PLT section.
3329 template<int size
, bool big_endian
>
3331 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3334 if (this->plt_
== NULL
)
3336 if (this->got_
== NULL
)
3337 this->got_section(symtab
, layout
);
3339 if (this->glink_
== NULL
)
3340 make_glink_section(layout
);
3342 // Ensure that .rela.dyn always appears before .rela.plt This is
3343 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3344 // needs to include .rela.plt in its range.
3345 this->rela_dyn_section(layout
);
3347 Reloc_section
* plt_rel
= new Reloc_section(false);
3348 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3349 elfcpp::SHF_ALLOC
, plt_rel
,
3350 ORDER_DYNAMIC_PLT_RELOCS
, false);
3352 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3354 layout
->add_output_section_data(".plt",
3356 ? elfcpp::SHT_PROGBITS
3357 : elfcpp::SHT_NOBITS
),
3358 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3367 // Create the IPLT section.
3369 template<int size
, bool big_endian
>
3371 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3374 if (this->iplt_
== NULL
)
3376 this->make_plt_section(symtab
, layout
);
3378 Reloc_section
* iplt_rel
= new Reloc_section(false);
3379 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3381 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3383 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3387 // A section for huge long branch addresses, similar to plt section.
3389 template<int size
, bool big_endian
>
3390 class Output_data_brlt_powerpc
: public Output_section_data_build
3393 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3394 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3395 size
, big_endian
> Reloc_section
;
3397 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3398 Reloc_section
* brlt_rel
)
3399 : Output_section_data_build(size
== 32 ? 4 : 8),
3407 this->reset_data_size();
3408 this->rel_
->reset_data_size();
3412 finalize_brlt_sizes()
3414 this->finalize_data_size();
3415 this->rel_
->finalize_data_size();
3418 // Add a reloc for an entry in the BRLT.
3420 add_reloc(Address to
, unsigned int off
)
3421 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3423 // Update section and reloc section size.
3425 set_current_size(unsigned int num_branches
)
3427 this->reset_address_and_file_offset();
3428 this->set_current_data_size(num_branches
* 16);
3429 this->finalize_data_size();
3430 Output_section
* os
= this->output_section();
3431 os
->set_section_offsets_need_adjustment();
3432 if (this->rel_
!= NULL
)
3434 unsigned int reloc_size
3435 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3436 this->rel_
->reset_address_and_file_offset();
3437 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3438 this->rel_
->finalize_data_size();
3439 Output_section
* os
= this->rel_
->output_section();
3440 os
->set_section_offsets_need_adjustment();
3446 do_adjust_output_section(Output_section
* os
)
3451 // Write to a map file.
3453 do_print_to_mapfile(Mapfile
* mapfile
) const
3454 { mapfile
->print_output_data(this, "** BRLT"); }
3457 // Write out the BRLT data.
3459 do_write(Output_file
*);
3461 // The reloc section.
3462 Reloc_section
* rel_
;
3463 Target_powerpc
<size
, big_endian
>* targ_
;
3466 // Make the branch lookup table section.
3468 template<int size
, bool big_endian
>
3470 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3472 if (size
== 64 && this->brlt_section_
== NULL
)
3474 Reloc_section
* brlt_rel
= NULL
;
3475 bool is_pic
= parameters
->options().output_is_position_independent();
3478 // When PIC we can't fill in .branch_lt (like .plt it can be
3479 // a bss style section) but must initialise at runtime via
3480 // dynamic relocats.
3481 this->rela_dyn_section(layout
);
3482 brlt_rel
= new Reloc_section(false);
3483 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3486 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3487 if (this->plt_
&& is_pic
)
3488 this->plt_
->output_section()
3489 ->add_output_section_data(this->brlt_section_
);
3491 layout
->add_output_section_data(".branch_lt",
3492 (is_pic
? elfcpp::SHT_NOBITS
3493 : elfcpp::SHT_PROGBITS
),
3494 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3495 this->brlt_section_
,
3496 (is_pic
? ORDER_SMALL_BSS
3497 : ORDER_SMALL_DATA
),
3502 // Write out .branch_lt when non-PIC.
3504 template<int size
, bool big_endian
>
3506 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3508 if (size
== 64 && !parameters
->options().output_is_position_independent())
3510 const section_size_type offset
= this->offset();
3511 const section_size_type oview_size
3512 = convert_to_section_size_type(this->data_size());
3513 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3515 this->targ_
->write_branch_lookup_table(oview
);
3516 of
->write_output_view(offset
, oview_size
, oview
);
3520 static inline uint32_t
3526 static inline uint32_t
3532 static inline uint32_t
3535 return hi(a
+ 0x8000);
3541 static const unsigned char eh_frame_cie
[12];
3545 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3548 'z', 'R', 0, // Augmentation string.
3549 4, // Code alignment.
3550 0x80 - size
/ 8 , // Data alignment.
3552 1, // Augmentation size.
3553 (elfcpp::DW_EH_PE_pcrel
3554 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3555 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3558 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3559 static const unsigned char glink_eh_frame_fde_64v1
[] =
3561 0, 0, 0, 0, // Replaced with offset to .glink.
3562 0, 0, 0, 0, // Replaced with size of .glink.
3563 0, // Augmentation size.
3564 elfcpp::DW_CFA_advance_loc
+ 1,
3565 elfcpp::DW_CFA_register
, 65, 12,
3566 elfcpp::DW_CFA_advance_loc
+ 4,
3567 elfcpp::DW_CFA_restore_extended
, 65
3570 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3571 static const unsigned char glink_eh_frame_fde_64v2
[] =
3573 0, 0, 0, 0, // Replaced with offset to .glink.
3574 0, 0, 0, 0, // Replaced with size of .glink.
3575 0, // Augmentation size.
3576 elfcpp::DW_CFA_advance_loc
+ 1,
3577 elfcpp::DW_CFA_register
, 65, 0,
3578 elfcpp::DW_CFA_advance_loc
+ 4,
3579 elfcpp::DW_CFA_restore_extended
, 65
3582 // Describe __glink_PLTresolve use of LR, 32-bit version.
3583 static const unsigned char glink_eh_frame_fde_32
[] =
3585 0, 0, 0, 0, // Replaced with offset to .glink.
3586 0, 0, 0, 0, // Replaced with size of .glink.
3587 0, // Augmentation size.
3588 elfcpp::DW_CFA_advance_loc
+ 2,
3589 elfcpp::DW_CFA_register
, 65, 0,
3590 elfcpp::DW_CFA_advance_loc
+ 4,
3591 elfcpp::DW_CFA_restore_extended
, 65
3594 static const unsigned char default_fde
[] =
3596 0, 0, 0, 0, // Replaced with offset to stubs.
3597 0, 0, 0, 0, // Replaced with size of stubs.
3598 0, // Augmentation size.
3599 elfcpp::DW_CFA_nop
, // Pad.
3604 template<bool big_endian
>
3606 write_insn(unsigned char* p
, uint32_t v
)
3608 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3611 // Stub_table holds information about plt and long branch stubs.
3612 // Stubs are built in an area following some input section determined
3613 // by group_sections(). This input section is converted to a relaxed
3614 // input section allowing it to be resized to accommodate the stubs
3616 template<int size
, bool big_endian
>
3617 class Stub_table
: public Output_relaxed_input_section
3620 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3621 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3623 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3624 Output_section
* output_section
,
3625 const Output_section::Input_section
* owner
)
3626 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3628 ->section_addralign(owner
->shndx())),
3629 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3630 orig_data_size_(owner
->current_data_size()),
3631 plt_size_(0), last_plt_size_(0),
3632 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3633 need_save_res_(false)
3635 this->set_output_section(output_section
);
3637 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3638 new_relaxed
.push_back(this);
3639 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3642 // Add a plt call stub.
3644 add_plt_call_entry(Address
,
3645 const Sized_relobj_file
<size
, big_endian
>*,
3651 add_plt_call_entry(Address
,
3652 const Sized_relobj_file
<size
, big_endian
>*,
3657 // Find a given plt call stub.
3659 find_plt_call_entry(const Symbol
*) const;
3662 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3663 unsigned int) const;
3666 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3672 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3677 // Add a long branch stub.
3679 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3680 unsigned int, Address
, Address
, bool);
3683 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3687 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3689 Address max_branch_offset
= max_branch_delta(r_type
);
3690 if (max_branch_offset
== 0)
3692 gold_assert(from
!= invalid_address
);
3693 Address loc
= off
+ this->stub_address();
3694 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3698 clear_stubs(bool all
)
3700 this->plt_call_stubs_
.clear();
3701 this->plt_size_
= 0;
3702 this->long_branch_stubs_
.clear();
3703 this->branch_size_
= 0;
3704 this->need_save_res_
= false;
3707 this->last_plt_size_
= 0;
3708 this->last_branch_size_
= 0;
3713 set_address_and_size(const Output_section
* os
, Address off
)
3715 Address start_off
= off
;
3716 off
+= this->orig_data_size_
;
3717 Address my_size
= this->plt_size_
+ this->branch_size_
;
3718 if (this->need_save_res_
)
3719 my_size
+= this->targ_
->savres_section()->data_size();
3721 off
= align_address(off
, this->stub_align());
3722 // Include original section size and alignment padding in size
3723 my_size
+= off
- start_off
;
3724 this->reset_address_and_file_offset();
3725 this->set_current_data_size(my_size
);
3726 this->set_address_and_file_offset(os
->address() + start_off
,
3727 os
->offset() + start_off
);
3732 stub_address() const
3734 return align_address(this->address() + this->orig_data_size_
,
3735 this->stub_align());
3741 return align_address(this->offset() + this->orig_data_size_
,
3742 this->stub_align());
3747 { return this->plt_size_
; }
3752 Output_section
* os
= this->output_section();
3753 if (os
->addralign() < this->stub_align())
3755 os
->set_addralign(this->stub_align());
3756 // FIXME: get rid of the insane checkpointing.
3757 // We can't increase alignment of the input section to which
3758 // stubs are attached; The input section may be .init which
3759 // is pasted together with other .init sections to form a
3760 // function. Aligning might insert zero padding resulting in
3761 // sigill. However we do need to increase alignment of the
3762 // output section so that the align_address() on offset in
3763 // set_address_and_size() adds the same padding as the
3764 // align_address() on address in stub_address().
3765 // What's more, we need this alignment for the layout done in
3766 // relaxation_loop_body() so that the output section starts at
3767 // a suitably aligned address.
3768 os
->checkpoint_set_addralign(this->stub_align());
3770 if (this->last_plt_size_
!= this->plt_size_
3771 || this->last_branch_size_
!= this->branch_size_
)
3773 this->last_plt_size_
= this->plt_size_
;
3774 this->last_branch_size_
= this->branch_size_
;
3780 // Add .eh_frame info for this stub section. Unlike other linker
3781 // generated .eh_frame this is added late in the link, because we
3782 // only want the .eh_frame info if this particular stub section is
3785 add_eh_frame(Layout
* layout
)
3787 if (!this->eh_frame_added_
)
3789 if (!parameters
->options().ld_generated_unwind_info())
3792 // Since we add stub .eh_frame info late, it must be placed
3793 // after all other linker generated .eh_frame info so that
3794 // merge mapping need not be updated for input sections.
3795 // There is no provision to use a different CIE to that used
3797 if (!this->targ_
->has_glink())
3800 layout
->add_eh_frame_for_plt(this,
3801 Eh_cie
<size
>::eh_frame_cie
,
3802 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3804 sizeof (default_fde
));
3805 this->eh_frame_added_
= true;
3809 Target_powerpc
<size
, big_endian
>*
3815 class Plt_stub_ent_hash
;
3816 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3817 Plt_stub_ent_hash
> Plt_stub_entries
;
3819 // Alignment of stub section.
3825 unsigned int min_align
= 32;
3826 unsigned int user_align
= 1 << parameters
->options().plt_align();
3827 return std::max(user_align
, min_align
);
3830 // Return the plt offset for the given call stub.
3832 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3834 const Symbol
* gsym
= p
->first
.sym_
;
3837 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3838 && gsym
->can_use_relative_reloc(false));
3839 return gsym
->plt_offset();
3844 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3845 unsigned int local_sym_index
= p
->first
.locsym_
;
3846 return relobj
->local_plt_offset(local_sym_index
);
3850 // Size of a given plt call stub.
3852 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3858 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3860 plt_addr
+= this->targ_
->iplt_section()->address();
3862 plt_addr
+= this->targ_
->plt_section()->address();
3863 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3864 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3865 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3866 got_addr
+= ppcobj
->toc_base_offset();
3867 Address off
= plt_addr
- got_addr
;
3868 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3869 if (this->targ_
->abiversion() < 2)
3871 bool static_chain
= parameters
->options().plt_static_chain();
3872 bool thread_safe
= this->targ_
->plt_thread_safe();
3876 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3878 unsigned int align
= 1 << parameters
->options().plt_align();
3880 bytes
= (bytes
+ align
- 1) & -align
;
3884 // Return long branch stub size.
3886 branch_stub_size(Address to
)
3889 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3890 if (to
- loc
+ (1 << 25) < 2 << 25)
3892 if (size
== 64 || !parameters
->options().output_is_position_independent())
3899 do_write(Output_file
*);
3901 // Plt call stub keys.
3905 Plt_stub_ent(const Symbol
* sym
)
3906 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3909 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3910 unsigned int locsym_index
)
3911 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3914 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3916 unsigned int r_type
,
3918 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3921 this->addend_
= addend
;
3922 else if (parameters
->options().output_is_position_independent()
3923 && r_type
== elfcpp::R_PPC_PLTREL24
)
3925 this->addend_
= addend
;
3926 if (this->addend_
>= 32768)
3927 this->object_
= object
;
3931 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3932 unsigned int locsym_index
,
3933 unsigned int r_type
,
3935 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3938 this->addend_
= addend
;
3939 else if (parameters
->options().output_is_position_independent()
3940 && r_type
== elfcpp::R_PPC_PLTREL24
)
3941 this->addend_
= addend
;
3944 bool operator==(const Plt_stub_ent
& that
) const
3946 return (this->sym_
== that
.sym_
3947 && this->object_
== that
.object_
3948 && this->addend_
== that
.addend_
3949 && this->locsym_
== that
.locsym_
);
3953 const Sized_relobj_file
<size
, big_endian
>* object_
;
3954 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3955 unsigned int locsym_
;
3958 class Plt_stub_ent_hash
3961 size_t operator()(const Plt_stub_ent
& ent
) const
3963 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3964 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3970 // Long branch stub keys.
3971 class Branch_stub_ent
3974 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
3975 Address to
, bool save_res
)
3976 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
3979 toc_base_off_
= obj
->toc_base_offset();
3982 bool operator==(const Branch_stub_ent
& that
) const
3984 return (this->dest_
== that
.dest_
3986 || this->toc_base_off_
== that
.toc_base_off_
));
3990 unsigned int toc_base_off_
;
3994 class Branch_stub_ent_hash
3997 size_t operator()(const Branch_stub_ent
& ent
) const
3998 { return ent
.dest_
^ ent
.toc_base_off_
; }
4001 // In a sane world this would be a global.
4002 Target_powerpc
<size
, big_endian
>* targ_
;
4003 // Map sym/object/addend to stub offset.
4004 Plt_stub_entries plt_call_stubs_
;
4005 // Map destination address to stub offset.
4006 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4007 Branch_stub_ent_hash
> Branch_stub_entries
;
4008 Branch_stub_entries long_branch_stubs_
;
4009 // size of input section
4010 section_size_type orig_data_size_
;
4012 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4013 // Whether .eh_frame info has been created for this stub section.
4014 bool eh_frame_added_
;
4015 // Set if this stub group needs a copy of out-of-line register
4016 // save/restore functions.
4017 bool need_save_res_
;
4020 // Add a plt call stub, if we do not already have one for this
4021 // sym/object/addend combo.
4023 template<int size
, bool big_endian
>
4025 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4027 const Sized_relobj_file
<size
, big_endian
>* object
,
4029 unsigned int r_type
,
4032 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4033 unsigned int off
= this->plt_size_
;
4034 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4035 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4037 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4038 return this->can_reach_stub(from
, off
, r_type
);
4041 template<int size
, bool big_endian
>
4043 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4045 const Sized_relobj_file
<size
, big_endian
>* object
,
4046 unsigned int locsym_index
,
4047 unsigned int r_type
,
4050 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4051 unsigned int off
= this->plt_size_
;
4052 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4053 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4055 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4056 return this->can_reach_stub(from
, off
, r_type
);
4059 // Find a plt call stub.
4061 template<int size
, bool big_endian
>
4062 typename Stub_table
<size
, big_endian
>::Address
4063 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4064 const Sized_relobj_file
<size
, big_endian
>* object
,
4066 unsigned int r_type
,
4067 Address addend
) const
4069 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4070 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4071 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4074 template<int size
, bool big_endian
>
4075 typename Stub_table
<size
, big_endian
>::Address
4076 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4078 Plt_stub_ent
ent(gsym
);
4079 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4080 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4083 template<int size
, bool big_endian
>
4084 typename Stub_table
<size
, big_endian
>::Address
4085 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4086 const Sized_relobj_file
<size
, big_endian
>* object
,
4087 unsigned int locsym_index
,
4088 unsigned int r_type
,
4089 Address addend
) const
4091 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4092 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4093 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4096 template<int size
, bool big_endian
>
4097 typename Stub_table
<size
, big_endian
>::Address
4098 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4099 const Sized_relobj_file
<size
, big_endian
>* object
,
4100 unsigned int locsym_index
) const
4102 Plt_stub_ent
ent(object
, locsym_index
);
4103 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4104 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4107 // Add a long branch stub if we don't already have one to given
4110 template<int size
, bool big_endian
>
4112 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4113 const Powerpc_relobj
<size
, big_endian
>* object
,
4114 unsigned int r_type
,
4119 Branch_stub_ent
ent(object
, to
, save_res
);
4120 Address off
= this->branch_size_
;
4121 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4124 this->need_save_res_
= true;
4127 unsigned int stub_size
= this->branch_stub_size(to
);
4128 this->branch_size_
= off
+ stub_size
;
4129 if (size
== 64 && stub_size
!= 4)
4130 this->targ_
->add_branch_lookup_table(to
);
4133 return this->can_reach_stub(from
, off
, r_type
);
4136 // Find long branch stub offset.
4138 template<int size
, bool big_endian
>
4139 typename Stub_table
<size
, big_endian
>::Address
4140 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4141 const Powerpc_relobj
<size
, big_endian
>* object
,
4144 Branch_stub_ent
ent(object
, to
, false);
4145 typename
Branch_stub_entries::const_iterator p
4146 = this->long_branch_stubs_
.find(ent
);
4147 if (p
== this->long_branch_stubs_
.end())
4148 return invalid_address
;
4149 if (p
->first
.save_res_
)
4150 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4154 // A class to handle .glink.
4156 template<int size
, bool big_endian
>
4157 class Output_data_glink
: public Output_section_data
4160 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4161 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4162 static const int pltresolve_size
= 16*4;
4164 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4165 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4166 end_branch_table_(), ge_size_(0)
4170 add_eh_frame(Layout
* layout
);
4173 add_global_entry(const Symbol
*);
4176 find_global_entry(const Symbol
*) const;
4179 global_entry_address() const
4181 gold_assert(this->is_data_size_valid());
4182 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4183 return this->address() + global_entry_off
;
4187 // Write to a map file.
4189 do_print_to_mapfile(Mapfile
* mapfile
) const
4190 { mapfile
->print_output_data(this, _("** glink")); }
4194 set_final_data_size();
4198 do_write(Output_file
*);
4200 // Allows access to .got and .plt for do_write.
4201 Target_powerpc
<size
, big_endian
>* targ_
;
4203 // Map sym to stub offset.
4204 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4205 Global_entry_stub_entries global_entry_stubs_
;
4207 unsigned int end_branch_table_
, ge_size_
;
4210 template<int size
, bool big_endian
>
4212 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4214 if (!parameters
->options().ld_generated_unwind_info())
4219 if (this->targ_
->abiversion() < 2)
4220 layout
->add_eh_frame_for_plt(this,
4221 Eh_cie
<64>::eh_frame_cie
,
4222 sizeof (Eh_cie
<64>::eh_frame_cie
),
4223 glink_eh_frame_fde_64v1
,
4224 sizeof (glink_eh_frame_fde_64v1
));
4226 layout
->add_eh_frame_for_plt(this,
4227 Eh_cie
<64>::eh_frame_cie
,
4228 sizeof (Eh_cie
<64>::eh_frame_cie
),
4229 glink_eh_frame_fde_64v2
,
4230 sizeof (glink_eh_frame_fde_64v2
));
4234 // 32-bit .glink can use the default since the CIE return
4235 // address reg, LR, is valid.
4236 layout
->add_eh_frame_for_plt(this,
4237 Eh_cie
<32>::eh_frame_cie
,
4238 sizeof (Eh_cie
<32>::eh_frame_cie
),
4240 sizeof (default_fde
));
4241 // Except where LR is used in a PIC __glink_PLTresolve.
4242 if (parameters
->options().output_is_position_independent())
4243 layout
->add_eh_frame_for_plt(this,
4244 Eh_cie
<32>::eh_frame_cie
,
4245 sizeof (Eh_cie
<32>::eh_frame_cie
),
4246 glink_eh_frame_fde_32
,
4247 sizeof (glink_eh_frame_fde_32
));
4251 template<int size
, bool big_endian
>
4253 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4255 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4256 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4258 this->ge_size_
+= 16;
4261 template<int size
, bool big_endian
>
4262 typename Output_data_glink
<size
, big_endian
>::Address
4263 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4265 typename
Global_entry_stub_entries::const_iterator p
4266 = this->global_entry_stubs_
.find(gsym
);
4267 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4270 template<int size
, bool big_endian
>
4272 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4274 unsigned int count
= this->targ_
->plt_entry_count();
4275 section_size_type total
= 0;
4281 // space for branch table
4282 total
+= 4 * (count
- 1);
4284 total
+= -total
& 15;
4285 total
+= this->pltresolve_size
;
4289 total
+= this->pltresolve_size
;
4291 // space for branch table
4293 if (this->targ_
->abiversion() < 2)
4297 total
+= 4 * (count
- 0x8000);
4301 this->end_branch_table_
= total
;
4302 total
= (total
+ 15) & -16;
4303 total
+= this->ge_size_
;
4305 this->set_data_size(total
);
4308 // Write out plt and long branch stub code.
4310 template<int size
, bool big_endian
>
4312 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4314 if (this->plt_call_stubs_
.empty()
4315 && this->long_branch_stubs_
.empty())
4318 const section_size_type start_off
= this->offset();
4319 const section_size_type off
= this->stub_offset();
4320 const section_size_type oview_size
=
4321 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4322 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4327 const Output_data_got_powerpc
<size
, big_endian
>* got
4328 = this->targ_
->got_section();
4329 Address got_os_addr
= got
->output_section()->address();
4331 if (!this->plt_call_stubs_
.empty())
4333 // The base address of the .plt section.
4334 Address plt_base
= this->targ_
->plt_section()->address();
4335 Address iplt_base
= invalid_address
;
4337 // Write out plt call stubs.
4338 typename
Plt_stub_entries::const_iterator cs
;
4339 for (cs
= this->plt_call_stubs_
.begin();
4340 cs
!= this->plt_call_stubs_
.end();
4344 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4345 Address plt_addr
= pltoff
;
4348 if (iplt_base
== invalid_address
)
4349 iplt_base
= this->targ_
->iplt_section()->address();
4350 plt_addr
+= iplt_base
;
4353 plt_addr
+= plt_base
;
4354 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4355 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4356 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4357 Address off
= plt_addr
- got_addr
;
4359 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4360 gold_error(_("%s: linkage table error against `%s'"),
4361 cs
->first
.object_
->name().c_str(),
4362 cs
->first
.sym_
->demangled_name().c_str());
4364 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4366 = plt_load_toc
&& parameters
->options().plt_static_chain();
4368 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4369 bool use_fake_dep
= false;
4370 Address cmp_branch_off
= 0;
4373 unsigned int pltindex
4374 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4375 / this->targ_
->plt_entry_size());
4377 = (this->targ_
->glink_section()->pltresolve_size
4379 if (pltindex
> 32768)
4380 glinkoff
+= (pltindex
- 32768) * 4;
4382 = this->targ_
->glink_section()->address() + glinkoff
;
4384 = (this->stub_address() + cs
->second
+ 24
4385 + 4 * (ha(off
) != 0)
4386 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4387 + 4 * static_chain
);
4388 cmp_branch_off
= to
- from
;
4389 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4392 p
= oview
+ cs
->second
;
4395 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4399 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4401 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4406 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4408 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4412 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4414 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4418 write_insn
<big_endian
>(p
, mtctr_12
);
4424 write_insn
<big_endian
>(p
, xor_2_12_12
);
4426 write_insn
<big_endian
>(p
, add_11_11_2
);
4429 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4433 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4440 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4442 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4445 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4447 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4451 write_insn
<big_endian
>(p
, mtctr_12
);
4457 write_insn
<big_endian
>(p
, xor_11_12_12
);
4459 write_insn
<big_endian
>(p
, add_2_2_11
);
4464 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4467 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4471 if (thread_safe
&& !use_fake_dep
)
4473 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4475 write_insn
<big_endian
>(p
, bnectr_p4
);
4477 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4480 write_insn
<big_endian
>(p
, bctr
);
4484 // Write out long branch stubs.
4485 typename
Branch_stub_entries::const_iterator bs
;
4486 for (bs
= this->long_branch_stubs_
.begin();
4487 bs
!= this->long_branch_stubs_
.end();
4490 if (bs
->first
.save_res_
)
4492 p
= oview
+ this->plt_size_
+ bs
->second
;
4493 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4494 Address delta
= bs
->first
.dest_
- loc
;
4495 if (delta
+ (1 << 25) < 2 << 25)
4496 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4500 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4501 gold_assert(brlt_addr
!= invalid_address
);
4502 brlt_addr
+= this->targ_
->brlt_section()->address();
4503 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4504 Address brltoff
= brlt_addr
- got_addr
;
4505 if (ha(brltoff
) == 0)
4507 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4511 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4512 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4514 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4515 write_insn
<big_endian
>(p
, bctr
);
4521 if (!this->plt_call_stubs_
.empty())
4523 // The base address of the .plt section.
4524 Address plt_base
= this->targ_
->plt_section()->address();
4525 Address iplt_base
= invalid_address
;
4526 // The address of _GLOBAL_OFFSET_TABLE_.
4527 Address g_o_t
= invalid_address
;
4529 // Write out plt call stubs.
4530 typename
Plt_stub_entries::const_iterator cs
;
4531 for (cs
= this->plt_call_stubs_
.begin();
4532 cs
!= this->plt_call_stubs_
.end();
4536 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4539 if (iplt_base
== invalid_address
)
4540 iplt_base
= this->targ_
->iplt_section()->address();
4541 plt_addr
+= iplt_base
;
4544 plt_addr
+= plt_base
;
4546 p
= oview
+ cs
->second
;
4547 if (parameters
->options().output_is_position_independent())
4550 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4551 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4552 (cs
->first
.object_
));
4553 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4555 unsigned int got2
= ppcobj
->got2_shndx();
4556 got_addr
= ppcobj
->get_output_section_offset(got2
);
4557 gold_assert(got_addr
!= invalid_address
);
4558 got_addr
+= (ppcobj
->output_section(got2
)->address()
4559 + cs
->first
.addend_
);
4563 if (g_o_t
== invalid_address
)
4565 const Output_data_got_powerpc
<size
, big_endian
>* got
4566 = this->targ_
->got_section();
4567 g_o_t
= got
->address() + got
->g_o_t();
4572 Address off
= plt_addr
- got_addr
;
4575 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4576 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4577 write_insn
<big_endian
>(p
+ 8, bctr
);
4581 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4582 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4583 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4584 write_insn
<big_endian
>(p
+ 12, bctr
);
4589 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4590 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4591 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4592 write_insn
<big_endian
>(p
+ 12, bctr
);
4597 // Write out long branch stubs.
4598 typename
Branch_stub_entries::const_iterator bs
;
4599 for (bs
= this->long_branch_stubs_
.begin();
4600 bs
!= this->long_branch_stubs_
.end();
4603 if (bs
->first
.save_res_
)
4605 p
= oview
+ this->plt_size_
+ bs
->second
;
4606 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4607 Address delta
= bs
->first
.dest_
- loc
;
4608 if (delta
+ (1 << 25) < 2 << 25)
4609 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4610 else if (!parameters
->options().output_is_position_independent())
4612 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4613 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4614 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4615 write_insn
<big_endian
>(p
+ 12, bctr
);
4620 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4621 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4622 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4623 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4624 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4625 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4626 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4627 write_insn
<big_endian
>(p
+ 28, bctr
);
4631 if (this->need_save_res_
)
4633 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4634 memcpy (p
, this->targ_
->savres_section()->contents(),
4635 this->targ_
->savres_section()->data_size());
4639 // Write out .glink.
4641 template<int size
, bool big_endian
>
4643 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4645 const section_size_type off
= this->offset();
4646 const section_size_type oview_size
=
4647 convert_to_section_size_type(this->data_size());
4648 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4651 // The base address of the .plt section.
4652 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4653 Address plt_base
= this->targ_
->plt_section()->address();
4657 if (this->end_branch_table_
!= 0)
4659 // Write pltresolve stub.
4661 Address after_bcl
= this->address() + 16;
4662 Address pltoff
= plt_base
- after_bcl
;
4664 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4666 if (this->targ_
->abiversion() < 2)
4668 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4669 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4670 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4671 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4672 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4673 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4674 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4675 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4676 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4677 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4681 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4682 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4683 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4684 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4685 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4686 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4687 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4688 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4689 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4690 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4691 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4692 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4694 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4695 while (p
< oview
+ this->pltresolve_size
)
4696 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4698 // Write lazy link call stubs.
4700 while (p
< oview
+ this->end_branch_table_
)
4702 if (this->targ_
->abiversion() < 2)
4706 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4710 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4711 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4714 uint32_t branch_off
= 8 - (p
- oview
);
4715 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4720 Address plt_base
= this->targ_
->plt_section()->address();
4721 Address iplt_base
= invalid_address
;
4722 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4723 Address global_entry_base
= this->address() + global_entry_off
;
4724 typename
Global_entry_stub_entries::const_iterator ge
;
4725 for (ge
= this->global_entry_stubs_
.begin();
4726 ge
!= this->global_entry_stubs_
.end();
4729 p
= oview
+ global_entry_off
+ ge
->second
;
4730 Address plt_addr
= ge
->first
->plt_offset();
4731 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4732 && ge
->first
->can_use_relative_reloc(false))
4734 if (iplt_base
== invalid_address
)
4735 iplt_base
= this->targ_
->iplt_section()->address();
4736 plt_addr
+= iplt_base
;
4739 plt_addr
+= plt_base
;
4740 Address my_addr
= global_entry_base
+ ge
->second
;
4741 Address off
= plt_addr
- my_addr
;
4743 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4744 gold_error(_("%s: linkage table error against `%s'"),
4745 ge
->first
->object()->name().c_str(),
4746 ge
->first
->demangled_name().c_str());
4748 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4749 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4750 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4751 write_insn
<big_endian
>(p
, bctr
);
4756 const Output_data_got_powerpc
<size
, big_endian
>* got
4757 = this->targ_
->got_section();
4758 // The address of _GLOBAL_OFFSET_TABLE_.
4759 Address g_o_t
= got
->address() + got
->g_o_t();
4761 // Write out pltresolve branch table.
4763 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4764 unsigned char* end_p
= oview
+ the_end
;
4765 while (p
< end_p
- 8 * 4)
4766 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4768 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4770 // Write out pltresolve call stub.
4771 if (parameters
->options().output_is_position_independent())
4773 Address res0_off
= 0;
4774 Address after_bcl_off
= the_end
+ 12;
4775 Address bcl_res0
= after_bcl_off
- res0_off
;
4777 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4778 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4779 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4780 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4781 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4782 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4783 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4785 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4787 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4788 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4790 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4791 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4795 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4796 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4798 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4799 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4800 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4801 write_insn
<big_endian
>(p
+ 52, bctr
);
4802 write_insn
<big_endian
>(p
+ 56, nop
);
4803 write_insn
<big_endian
>(p
+ 60, nop
);
4807 Address res0
= this->address();
4809 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4810 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4811 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4812 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4814 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4815 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4816 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4817 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4818 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4819 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4821 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4822 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4823 write_insn
<big_endian
>(p
+ 32, bctr
);
4824 write_insn
<big_endian
>(p
+ 36, nop
);
4825 write_insn
<big_endian
>(p
+ 40, nop
);
4826 write_insn
<big_endian
>(p
+ 44, nop
);
4827 write_insn
<big_endian
>(p
+ 48, nop
);
4828 write_insn
<big_endian
>(p
+ 52, nop
);
4829 write_insn
<big_endian
>(p
+ 56, nop
);
4830 write_insn
<big_endian
>(p
+ 60, nop
);
4835 of
->write_output_view(off
, oview_size
, oview
);
4839 // A class to handle linker generated save/restore functions.
4841 template<int size
, bool big_endian
>
4842 class Output_data_save_res
: public Output_section_data_build
4845 Output_data_save_res(Symbol_table
* symtab
);
4847 const unsigned char*
4854 // Write to a map file.
4856 do_print_to_mapfile(Mapfile
* mapfile
) const
4857 { mapfile
->print_output_data(this, _("** save/restore")); }
4860 do_write(Output_file
*);
4863 // The maximum size of save/restore contents.
4864 static const unsigned int savres_max
= 218*4;
4867 savres_define(Symbol_table
* symtab
,
4869 unsigned int lo
, unsigned int hi
,
4870 unsigned char* write_ent(unsigned char*, int),
4871 unsigned char* write_tail(unsigned char*, int));
4873 unsigned char *contents_
;
4876 template<bool big_endian
>
4877 static unsigned char*
4878 savegpr0(unsigned char* p
, int r
)
4880 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4881 write_insn
<big_endian
>(p
, insn
);
4885 template<bool big_endian
>
4886 static unsigned char*
4887 savegpr0_tail(unsigned char* p
, int r
)
4889 p
= savegpr0
<big_endian
>(p
, r
);
4890 uint32_t insn
= std_0_1
+ 16;
4891 write_insn
<big_endian
>(p
, insn
);
4893 write_insn
<big_endian
>(p
, blr
);
4897 template<bool big_endian
>
4898 static unsigned char*
4899 restgpr0(unsigned char* p
, int r
)
4901 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4902 write_insn
<big_endian
>(p
, insn
);
4906 template<bool big_endian
>
4907 static unsigned char*
4908 restgpr0_tail(unsigned char* p
, int r
)
4910 uint32_t insn
= ld_0_1
+ 16;
4911 write_insn
<big_endian
>(p
, insn
);
4913 p
= restgpr0
<big_endian
>(p
, r
);
4914 write_insn
<big_endian
>(p
, mtlr_0
);
4918 p
= restgpr0
<big_endian
>(p
, 30);
4919 p
= restgpr0
<big_endian
>(p
, 31);
4921 write_insn
<big_endian
>(p
, blr
);
4925 template<bool big_endian
>
4926 static unsigned char*
4927 savegpr1(unsigned char* p
, int r
)
4929 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4930 write_insn
<big_endian
>(p
, insn
);
4934 template<bool big_endian
>
4935 static unsigned char*
4936 savegpr1_tail(unsigned char* p
, int r
)
4938 p
= savegpr1
<big_endian
>(p
, r
);
4939 write_insn
<big_endian
>(p
, blr
);
4943 template<bool big_endian
>
4944 static unsigned char*
4945 restgpr1(unsigned char* p
, int r
)
4947 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4948 write_insn
<big_endian
>(p
, insn
);
4952 template<bool big_endian
>
4953 static unsigned char*
4954 restgpr1_tail(unsigned char* p
, int r
)
4956 p
= restgpr1
<big_endian
>(p
, r
);
4957 write_insn
<big_endian
>(p
, blr
);
4961 template<bool big_endian
>
4962 static unsigned char*
4963 savefpr(unsigned char* p
, int r
)
4965 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4966 write_insn
<big_endian
>(p
, insn
);
4970 template<bool big_endian
>
4971 static unsigned char*
4972 savefpr0_tail(unsigned char* p
, int r
)
4974 p
= savefpr
<big_endian
>(p
, r
);
4975 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4977 write_insn
<big_endian
>(p
, blr
);
4981 template<bool big_endian
>
4982 static unsigned char*
4983 restfpr(unsigned char* p
, int r
)
4985 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4986 write_insn
<big_endian
>(p
, insn
);
4990 template<bool big_endian
>
4991 static unsigned char*
4992 restfpr0_tail(unsigned char* p
, int r
)
4994 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4996 p
= restfpr
<big_endian
>(p
, r
);
4997 write_insn
<big_endian
>(p
, mtlr_0
);
5001 p
= restfpr
<big_endian
>(p
, 30);
5002 p
= restfpr
<big_endian
>(p
, 31);
5004 write_insn
<big_endian
>(p
, blr
);
5008 template<bool big_endian
>
5009 static unsigned char*
5010 savefpr1_tail(unsigned char* p
, int r
)
5012 p
= savefpr
<big_endian
>(p
, r
);
5013 write_insn
<big_endian
>(p
, blr
);
5017 template<bool big_endian
>
5018 static unsigned char*
5019 restfpr1_tail(unsigned char* p
, int r
)
5021 p
= restfpr
<big_endian
>(p
, r
);
5022 write_insn
<big_endian
>(p
, blr
);
5026 template<bool big_endian
>
5027 static unsigned char*
5028 savevr(unsigned char* p
, int r
)
5030 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5031 write_insn
<big_endian
>(p
, insn
);
5033 insn
= stvx_0_12_0
+ (r
<< 21);
5034 write_insn
<big_endian
>(p
, insn
);
5038 template<bool big_endian
>
5039 static unsigned char*
5040 savevr_tail(unsigned char* p
, int r
)
5042 p
= savevr
<big_endian
>(p
, r
);
5043 write_insn
<big_endian
>(p
, blr
);
5047 template<bool big_endian
>
5048 static unsigned char*
5049 restvr(unsigned char* p
, int r
)
5051 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5052 write_insn
<big_endian
>(p
, insn
);
5054 insn
= lvx_0_12_0
+ (r
<< 21);
5055 write_insn
<big_endian
>(p
, insn
);
5059 template<bool big_endian
>
5060 static unsigned char*
5061 restvr_tail(unsigned char* p
, int r
)
5063 p
= restvr
<big_endian
>(p
, r
);
5064 write_insn
<big_endian
>(p
, blr
);
5069 template<int size
, bool big_endian
>
5070 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5071 Symbol_table
* symtab
)
5072 : Output_section_data_build(4),
5075 this->savres_define(symtab
,
5076 "_savegpr0_", 14, 31,
5077 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5078 this->savres_define(symtab
,
5079 "_restgpr0_", 14, 29,
5080 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5081 this->savres_define(symtab
,
5082 "_restgpr0_", 30, 31,
5083 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5084 this->savres_define(symtab
,
5085 "_savegpr1_", 14, 31,
5086 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5087 this->savres_define(symtab
,
5088 "_restgpr1_", 14, 31,
5089 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5090 this->savres_define(symtab
,
5091 "_savefpr_", 14, 31,
5092 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5093 this->savres_define(symtab
,
5094 "_restfpr_", 14, 29,
5095 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5096 this->savres_define(symtab
,
5097 "_restfpr_", 30, 31,
5098 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5099 this->savres_define(symtab
,
5101 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5102 this->savres_define(symtab
,
5104 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5105 this->savres_define(symtab
,
5107 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5108 this->savres_define(symtab
,
5110 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5113 template<int size
, bool big_endian
>
5115 Output_data_save_res
<size
, big_endian
>::savres_define(
5116 Symbol_table
* symtab
,
5118 unsigned int lo
, unsigned int hi
,
5119 unsigned char* write_ent(unsigned char*, int),
5120 unsigned char* write_tail(unsigned char*, int))
5122 size_t len
= strlen(name
);
5123 bool writing
= false;
5126 memcpy(sym
, name
, len
);
5129 for (unsigned int i
= lo
; i
<= hi
; i
++)
5131 sym
[len
+ 0] = i
/ 10 + '0';
5132 sym
[len
+ 1] = i
% 10 + '0';
5133 Symbol
* gsym
= symtab
->lookup(sym
);
5134 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5135 writing
= writing
|| refd
;
5138 if (this->contents_
== NULL
)
5139 this->contents_
= new unsigned char[this->savres_max
];
5141 section_size_type value
= this->current_data_size();
5142 unsigned char* p
= this->contents_
+ value
;
5144 p
= write_ent(p
, i
);
5146 p
= write_tail(p
, i
);
5147 section_size_type cur_size
= p
- this->contents_
;
5148 this->set_current_data_size(cur_size
);
5150 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5151 this, value
, cur_size
- value
,
5152 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5153 elfcpp::STV_HIDDEN
, 0, false, false);
5158 // Write out save/restore.
5160 template<int size
, bool big_endian
>
5162 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5164 const section_size_type off
= this->offset();
5165 const section_size_type oview_size
=
5166 convert_to_section_size_type(this->data_size());
5167 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5168 memcpy(oview
, this->contents_
, oview_size
);
5169 of
->write_output_view(off
, oview_size
, oview
);
5173 // Create the glink section.
5175 template<int size
, bool big_endian
>
5177 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5179 if (this->glink_
== NULL
)
5181 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5182 this->glink_
->add_eh_frame(layout
);
5183 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5184 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5185 this->glink_
, ORDER_TEXT
, false);
5189 // Create a PLT entry for a global symbol.
5191 template<int size
, bool big_endian
>
5193 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5197 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5198 && gsym
->can_use_relative_reloc(false))
5200 if (this->iplt_
== NULL
)
5201 this->make_iplt_section(symtab
, layout
);
5202 this->iplt_
->add_ifunc_entry(gsym
);
5206 if (this->plt_
== NULL
)
5207 this->make_plt_section(symtab
, layout
);
5208 this->plt_
->add_entry(gsym
);
5212 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5214 template<int size
, bool big_endian
>
5216 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5217 Symbol_table
* symtab
,
5219 Sized_relobj_file
<size
, big_endian
>* relobj
,
5222 if (this->iplt_
== NULL
)
5223 this->make_iplt_section(symtab
, layout
);
5224 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5227 // Return the number of entries in the PLT.
5229 template<int size
, bool big_endian
>
5231 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5233 if (this->plt_
== NULL
)
5235 return this->plt_
->entry_count();
5238 // Create a GOT entry for local dynamic __tls_get_addr calls.
5240 template<int size
, bool big_endian
>
5242 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5243 Symbol_table
* symtab
,
5245 Sized_relobj_file
<size
, big_endian
>* object
)
5247 if (this->tlsld_got_offset_
== -1U)
5249 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5250 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5251 Output_data_got_powerpc
<size
, big_endian
>* got
5252 = this->got_section(symtab
, layout
);
5253 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5254 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5256 this->tlsld_got_offset_
= got_offset
;
5258 return this->tlsld_got_offset_
;
5261 // Get the Reference_flags for a particular relocation.
5263 template<int size
, bool big_endian
>
5265 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5266 unsigned int r_type
,
5267 const Target_powerpc
* target
)
5273 case elfcpp::R_POWERPC_NONE
:
5274 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5275 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5276 case elfcpp::R_PPC64_TOC
:
5277 // No symbol reference.
5280 case elfcpp::R_PPC64_ADDR64
:
5281 case elfcpp::R_PPC64_UADDR64
:
5282 case elfcpp::R_POWERPC_ADDR32
:
5283 case elfcpp::R_POWERPC_UADDR32
:
5284 case elfcpp::R_POWERPC_ADDR16
:
5285 case elfcpp::R_POWERPC_UADDR16
:
5286 case elfcpp::R_POWERPC_ADDR16_LO
:
5287 case elfcpp::R_POWERPC_ADDR16_HI
:
5288 case elfcpp::R_POWERPC_ADDR16_HA
:
5289 ref
= Symbol::ABSOLUTE_REF
;
5292 case elfcpp::R_POWERPC_ADDR24
:
5293 case elfcpp::R_POWERPC_ADDR14
:
5294 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5295 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5296 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5299 case elfcpp::R_PPC64_REL64
:
5300 case elfcpp::R_POWERPC_REL32
:
5301 case elfcpp::R_PPC_LOCAL24PC
:
5302 case elfcpp::R_POWERPC_REL16
:
5303 case elfcpp::R_POWERPC_REL16_LO
:
5304 case elfcpp::R_POWERPC_REL16_HI
:
5305 case elfcpp::R_POWERPC_REL16_HA
:
5306 ref
= Symbol::RELATIVE_REF
;
5309 case elfcpp::R_POWERPC_REL24
:
5310 case elfcpp::R_PPC_PLTREL24
:
5311 case elfcpp::R_POWERPC_REL14
:
5312 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5313 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5314 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5317 case elfcpp::R_POWERPC_GOT16
:
5318 case elfcpp::R_POWERPC_GOT16_LO
:
5319 case elfcpp::R_POWERPC_GOT16_HI
:
5320 case elfcpp::R_POWERPC_GOT16_HA
:
5321 case elfcpp::R_PPC64_GOT16_DS
:
5322 case elfcpp::R_PPC64_GOT16_LO_DS
:
5323 case elfcpp::R_PPC64_TOC16
:
5324 case elfcpp::R_PPC64_TOC16_LO
:
5325 case elfcpp::R_PPC64_TOC16_HI
:
5326 case elfcpp::R_PPC64_TOC16_HA
:
5327 case elfcpp::R_PPC64_TOC16_DS
:
5328 case elfcpp::R_PPC64_TOC16_LO_DS
:
5330 ref
= Symbol::ABSOLUTE_REF
;
5333 case elfcpp::R_POWERPC_GOT_TPREL16
:
5334 case elfcpp::R_POWERPC_TLS
:
5335 ref
= Symbol::TLS_REF
;
5338 case elfcpp::R_POWERPC_COPY
:
5339 case elfcpp::R_POWERPC_GLOB_DAT
:
5340 case elfcpp::R_POWERPC_JMP_SLOT
:
5341 case elfcpp::R_POWERPC_RELATIVE
:
5342 case elfcpp::R_POWERPC_DTPMOD
:
5344 // Not expected. We will give an error later.
5348 if (size
== 64 && target
->abiversion() < 2)
5349 ref
|= Symbol::FUNC_DESC_ABI
;
5353 // Report an unsupported relocation against a local symbol.
5355 template<int size
, bool big_endian
>
5357 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5358 Sized_relobj_file
<size
, big_endian
>* object
,
5359 unsigned int r_type
)
5361 gold_error(_("%s: unsupported reloc %u against local symbol"),
5362 object
->name().c_str(), r_type
);
5365 // We are about to emit a dynamic relocation of type R_TYPE. If the
5366 // dynamic linker does not support it, issue an error.
5368 template<int size
, bool big_endian
>
5370 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5371 unsigned int r_type
)
5373 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5375 // These are the relocation types supported by glibc for both 32-bit
5376 // and 64-bit powerpc.
5379 case elfcpp::R_POWERPC_NONE
:
5380 case elfcpp::R_POWERPC_RELATIVE
:
5381 case elfcpp::R_POWERPC_GLOB_DAT
:
5382 case elfcpp::R_POWERPC_DTPMOD
:
5383 case elfcpp::R_POWERPC_DTPREL
:
5384 case elfcpp::R_POWERPC_TPREL
:
5385 case elfcpp::R_POWERPC_JMP_SLOT
:
5386 case elfcpp::R_POWERPC_COPY
:
5387 case elfcpp::R_POWERPC_IRELATIVE
:
5388 case elfcpp::R_POWERPC_ADDR32
:
5389 case elfcpp::R_POWERPC_UADDR32
:
5390 case elfcpp::R_POWERPC_ADDR24
:
5391 case elfcpp::R_POWERPC_ADDR16
:
5392 case elfcpp::R_POWERPC_UADDR16
:
5393 case elfcpp::R_POWERPC_ADDR16_LO
:
5394 case elfcpp::R_POWERPC_ADDR16_HI
:
5395 case elfcpp::R_POWERPC_ADDR16_HA
:
5396 case elfcpp::R_POWERPC_ADDR14
:
5397 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5398 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5399 case elfcpp::R_POWERPC_REL32
:
5400 case elfcpp::R_POWERPC_REL24
:
5401 case elfcpp::R_POWERPC_TPREL16
:
5402 case elfcpp::R_POWERPC_TPREL16_LO
:
5403 case elfcpp::R_POWERPC_TPREL16_HI
:
5404 case elfcpp::R_POWERPC_TPREL16_HA
:
5415 // These are the relocation types supported only on 64-bit.
5416 case elfcpp::R_PPC64_ADDR64
:
5417 case elfcpp::R_PPC64_UADDR64
:
5418 case elfcpp::R_PPC64_JMP_IREL
:
5419 case elfcpp::R_PPC64_ADDR16_DS
:
5420 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5421 case elfcpp::R_PPC64_ADDR16_HIGH
:
5422 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5423 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5424 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5425 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5426 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5427 case elfcpp::R_PPC64_REL64
:
5428 case elfcpp::R_POWERPC_ADDR30
:
5429 case elfcpp::R_PPC64_TPREL16_DS
:
5430 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5431 case elfcpp::R_PPC64_TPREL16_HIGH
:
5432 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5433 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5434 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5435 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5436 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5447 // These are the relocation types supported only on 32-bit.
5448 // ??? glibc ld.so doesn't need to support these.
5449 case elfcpp::R_POWERPC_DTPREL16
:
5450 case elfcpp::R_POWERPC_DTPREL16_LO
:
5451 case elfcpp::R_POWERPC_DTPREL16_HI
:
5452 case elfcpp::R_POWERPC_DTPREL16_HA
:
5460 // This prevents us from issuing more than one error per reloc
5461 // section. But we can still wind up issuing more than one
5462 // error per object file.
5463 if (this->issued_non_pic_error_
)
5465 gold_assert(parameters
->options().output_is_position_independent());
5466 object
->error(_("requires unsupported dynamic reloc; "
5467 "recompile with -fPIC"));
5468 this->issued_non_pic_error_
= true;
5472 // Return whether we need to make a PLT entry for a relocation of the
5473 // given type against a STT_GNU_IFUNC symbol.
5475 template<int size
, bool big_endian
>
5477 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5478 Target_powerpc
<size
, big_endian
>* target
,
5479 Sized_relobj_file
<size
, big_endian
>* object
,
5480 unsigned int r_type
,
5483 // In non-pic code any reference will resolve to the plt call stub
5484 // for the ifunc symbol.
5485 if ((size
== 32 || target
->abiversion() >= 2)
5486 && !parameters
->options().output_is_position_independent())
5491 // Word size refs from data sections are OK, but don't need a PLT entry.
5492 case elfcpp::R_POWERPC_ADDR32
:
5493 case elfcpp::R_POWERPC_UADDR32
:
5498 case elfcpp::R_PPC64_ADDR64
:
5499 case elfcpp::R_PPC64_UADDR64
:
5504 // GOT refs are good, but also don't need a PLT entry.
5505 case elfcpp::R_POWERPC_GOT16
:
5506 case elfcpp::R_POWERPC_GOT16_LO
:
5507 case elfcpp::R_POWERPC_GOT16_HI
:
5508 case elfcpp::R_POWERPC_GOT16_HA
:
5509 case elfcpp::R_PPC64_GOT16_DS
:
5510 case elfcpp::R_PPC64_GOT16_LO_DS
:
5513 // Function calls are good, and these do need a PLT entry.
5514 case elfcpp::R_POWERPC_ADDR24
:
5515 case elfcpp::R_POWERPC_ADDR14
:
5516 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5517 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5518 case elfcpp::R_POWERPC_REL24
:
5519 case elfcpp::R_PPC_PLTREL24
:
5520 case elfcpp::R_POWERPC_REL14
:
5521 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5522 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5529 // Anything else is a problem.
5530 // If we are building a static executable, the libc startup function
5531 // responsible for applying indirect function relocations is going
5532 // to complain about the reloc type.
5533 // If we are building a dynamic executable, we will have a text
5534 // relocation. The dynamic loader will set the text segment
5535 // writable and non-executable to apply text relocations. So we'll
5536 // segfault when trying to run the indirection function to resolve
5539 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5540 object
->name().c_str(), r_type
);
5544 // Scan a relocation for a local symbol.
5546 template<int size
, bool big_endian
>
5548 Target_powerpc
<size
, big_endian
>::Scan::local(
5549 Symbol_table
* symtab
,
5551 Target_powerpc
<size
, big_endian
>* target
,
5552 Sized_relobj_file
<size
, big_endian
>* object
,
5553 unsigned int data_shndx
,
5554 Output_section
* output_section
,
5555 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5556 unsigned int r_type
,
5557 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5560 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5562 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5563 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5565 this->expect_tls_get_addr_call();
5566 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5567 if (tls_type
!= tls::TLSOPT_NONE
)
5568 this->skip_next_tls_get_addr_call();
5570 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5571 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5573 this->expect_tls_get_addr_call();
5574 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5575 if (tls_type
!= tls::TLSOPT_NONE
)
5576 this->skip_next_tls_get_addr_call();
5579 Powerpc_relobj
<size
, big_endian
>* ppc_object
5580 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5585 && data_shndx
== ppc_object
->opd_shndx()
5586 && r_type
== elfcpp::R_PPC64_ADDR64
)
5587 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5591 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5592 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5593 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5595 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5596 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5597 r_type
, r_sym
, reloc
.get_r_addend());
5598 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5603 case elfcpp::R_POWERPC_NONE
:
5604 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5605 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5606 case elfcpp::R_PPC64_TOCSAVE
:
5607 case elfcpp::R_POWERPC_TLS
:
5610 case elfcpp::R_PPC64_TOC
:
5612 Output_data_got_powerpc
<size
, big_endian
>* got
5613 = target
->got_section(symtab
, layout
);
5614 if (parameters
->options().output_is_position_independent())
5616 Address off
= reloc
.get_r_offset();
5618 && target
->abiversion() < 2
5619 && data_shndx
== ppc_object
->opd_shndx()
5620 && ppc_object
->get_opd_discard(off
- 8))
5623 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5624 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5625 rela_dyn
->add_output_section_relative(got
->output_section(),
5626 elfcpp::R_POWERPC_RELATIVE
,
5628 object
, data_shndx
, off
,
5629 symobj
->toc_base_offset());
5634 case elfcpp::R_PPC64_ADDR64
:
5635 case elfcpp::R_PPC64_UADDR64
:
5636 case elfcpp::R_POWERPC_ADDR32
:
5637 case elfcpp::R_POWERPC_UADDR32
:
5638 case elfcpp::R_POWERPC_ADDR24
:
5639 case elfcpp::R_POWERPC_ADDR16
:
5640 case elfcpp::R_POWERPC_ADDR16_LO
:
5641 case elfcpp::R_POWERPC_ADDR16_HI
:
5642 case elfcpp::R_POWERPC_ADDR16_HA
:
5643 case elfcpp::R_POWERPC_UADDR16
:
5644 case elfcpp::R_PPC64_ADDR16_HIGH
:
5645 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5646 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5647 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5648 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5649 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5650 case elfcpp::R_PPC64_ADDR16_DS
:
5651 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5652 case elfcpp::R_POWERPC_ADDR14
:
5653 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5654 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5655 // If building a shared library (or a position-independent
5656 // executable), we need to create a dynamic relocation for
5658 if (parameters
->options().output_is_position_independent()
5659 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5661 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5663 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5664 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5665 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5667 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5668 : elfcpp::R_POWERPC_RELATIVE
);
5669 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5670 output_section
, data_shndx
,
5671 reloc
.get_r_offset(),
5672 reloc
.get_r_addend(), false);
5674 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5676 check_non_pic(object
, r_type
);
5677 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5678 data_shndx
, reloc
.get_r_offset(),
5679 reloc
.get_r_addend());
5683 gold_assert(lsym
.get_st_value() == 0);
5684 unsigned int shndx
= lsym
.get_st_shndx();
5686 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5689 object
->error(_("section symbol %u has bad shndx %u"),
5692 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5693 output_section
, data_shndx
,
5694 reloc
.get_r_offset());
5699 case elfcpp::R_POWERPC_REL24
:
5700 case elfcpp::R_PPC_PLTREL24
:
5701 case elfcpp::R_PPC_LOCAL24PC
:
5702 case elfcpp::R_POWERPC_REL14
:
5703 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5704 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5706 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5707 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5708 reloc
.get_r_addend());
5711 case elfcpp::R_PPC64_REL64
:
5712 case elfcpp::R_POWERPC_REL32
:
5713 case elfcpp::R_POWERPC_REL16
:
5714 case elfcpp::R_POWERPC_REL16_LO
:
5715 case elfcpp::R_POWERPC_REL16_HI
:
5716 case elfcpp::R_POWERPC_REL16_HA
:
5717 case elfcpp::R_POWERPC_REL16DX_HA
:
5718 case elfcpp::R_POWERPC_SECTOFF
:
5719 case elfcpp::R_POWERPC_SECTOFF_LO
:
5720 case elfcpp::R_POWERPC_SECTOFF_HI
:
5721 case elfcpp::R_POWERPC_SECTOFF_HA
:
5722 case elfcpp::R_PPC64_SECTOFF_DS
:
5723 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5724 case elfcpp::R_POWERPC_TPREL16
:
5725 case elfcpp::R_POWERPC_TPREL16_LO
:
5726 case elfcpp::R_POWERPC_TPREL16_HI
:
5727 case elfcpp::R_POWERPC_TPREL16_HA
:
5728 case elfcpp::R_PPC64_TPREL16_DS
:
5729 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5730 case elfcpp::R_PPC64_TPREL16_HIGH
:
5731 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5732 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5733 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5734 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5735 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5736 case elfcpp::R_POWERPC_DTPREL16
:
5737 case elfcpp::R_POWERPC_DTPREL16_LO
:
5738 case elfcpp::R_POWERPC_DTPREL16_HI
:
5739 case elfcpp::R_POWERPC_DTPREL16_HA
:
5740 case elfcpp::R_PPC64_DTPREL16_DS
:
5741 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5742 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5743 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5744 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5745 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5746 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5747 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5748 case elfcpp::R_PPC64_TLSGD
:
5749 case elfcpp::R_PPC64_TLSLD
:
5750 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5753 case elfcpp::R_POWERPC_GOT16
:
5754 case elfcpp::R_POWERPC_GOT16_LO
:
5755 case elfcpp::R_POWERPC_GOT16_HI
:
5756 case elfcpp::R_POWERPC_GOT16_HA
:
5757 case elfcpp::R_PPC64_GOT16_DS
:
5758 case elfcpp::R_PPC64_GOT16_LO_DS
:
5760 // The symbol requires a GOT entry.
5761 Output_data_got_powerpc
<size
, big_endian
>* got
5762 = target
->got_section(symtab
, layout
);
5763 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5765 if (!parameters
->options().output_is_position_independent())
5768 && (size
== 32 || target
->abiversion() >= 2))
5769 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5771 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5773 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5775 // If we are generating a shared object or a pie, this
5776 // symbol's GOT entry will be set by a dynamic relocation.
5778 off
= got
->add_constant(0);
5779 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5781 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5783 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5784 : elfcpp::R_POWERPC_RELATIVE
);
5785 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5786 got
, off
, 0, false);
5791 case elfcpp::R_PPC64_TOC16
:
5792 case elfcpp::R_PPC64_TOC16_LO
:
5793 case elfcpp::R_PPC64_TOC16_HI
:
5794 case elfcpp::R_PPC64_TOC16_HA
:
5795 case elfcpp::R_PPC64_TOC16_DS
:
5796 case elfcpp::R_PPC64_TOC16_LO_DS
:
5797 // We need a GOT section.
5798 target
->got_section(symtab
, layout
);
5801 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5802 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5803 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5804 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5806 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5807 if (tls_type
== tls::TLSOPT_NONE
)
5809 Output_data_got_powerpc
<size
, big_endian
>* got
5810 = target
->got_section(symtab
, layout
);
5811 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5812 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5813 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5814 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5816 else if (tls_type
== tls::TLSOPT_TO_LE
)
5818 // no GOT relocs needed for Local Exec.
5825 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5826 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5827 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5828 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5830 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5831 if (tls_type
== tls::TLSOPT_NONE
)
5832 target
->tlsld_got_offset(symtab
, layout
, object
);
5833 else if (tls_type
== tls::TLSOPT_TO_LE
)
5835 // no GOT relocs needed for Local Exec.
5836 if (parameters
->options().emit_relocs())
5838 Output_section
* os
= layout
->tls_segment()->first_section();
5839 gold_assert(os
!= NULL
);
5840 os
->set_needs_symtab_index();
5848 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5849 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5850 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5851 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5853 Output_data_got_powerpc
<size
, big_endian
>* got
5854 = target
->got_section(symtab
, layout
);
5855 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5856 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5860 case elfcpp::R_POWERPC_GOT_TPREL16
:
5861 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5862 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5863 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5865 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5866 if (tls_type
== tls::TLSOPT_NONE
)
5868 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5869 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5871 Output_data_got_powerpc
<size
, big_endian
>* got
5872 = target
->got_section(symtab
, layout
);
5873 unsigned int off
= got
->add_constant(0);
5874 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5876 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5877 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5878 elfcpp::R_POWERPC_TPREL
,
5882 else if (tls_type
== tls::TLSOPT_TO_LE
)
5884 // no GOT relocs needed for Local Exec.
5892 unsupported_reloc_local(object
, r_type
);
5898 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5899 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5900 case elfcpp::R_POWERPC_GOT_TPREL16
:
5901 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5902 case elfcpp::R_POWERPC_GOT16
:
5903 case elfcpp::R_PPC64_GOT16_DS
:
5904 case elfcpp::R_PPC64_TOC16
:
5905 case elfcpp::R_PPC64_TOC16_DS
:
5906 ppc_object
->set_has_small_toc_reloc();
5912 // Report an unsupported relocation against a global symbol.
5914 template<int size
, bool big_endian
>
5916 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5917 Sized_relobj_file
<size
, big_endian
>* object
,
5918 unsigned int r_type
,
5921 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5922 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5925 // Scan a relocation for a global symbol.
5927 template<int size
, bool big_endian
>
5929 Target_powerpc
<size
, big_endian
>::Scan::global(
5930 Symbol_table
* symtab
,
5932 Target_powerpc
<size
, big_endian
>* target
,
5933 Sized_relobj_file
<size
, big_endian
>* object
,
5934 unsigned int data_shndx
,
5935 Output_section
* output_section
,
5936 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5937 unsigned int r_type
,
5940 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5943 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5944 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5946 this->expect_tls_get_addr_call();
5947 const bool final
= gsym
->final_value_is_known();
5948 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5949 if (tls_type
!= tls::TLSOPT_NONE
)
5950 this->skip_next_tls_get_addr_call();
5952 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5953 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5955 this->expect_tls_get_addr_call();
5956 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5957 if (tls_type
!= tls::TLSOPT_NONE
)
5958 this->skip_next_tls_get_addr_call();
5961 Powerpc_relobj
<size
, big_endian
>* ppc_object
5962 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5964 // A STT_GNU_IFUNC symbol may require a PLT entry.
5965 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5966 bool pushed_ifunc
= false;
5967 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5969 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5970 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5971 reloc
.get_r_addend());
5972 target
->make_plt_entry(symtab
, layout
, gsym
);
5973 pushed_ifunc
= true;
5978 case elfcpp::R_POWERPC_NONE
:
5979 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5980 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5981 case elfcpp::R_PPC_LOCAL24PC
:
5982 case elfcpp::R_POWERPC_TLS
:
5985 case elfcpp::R_PPC64_TOC
:
5987 Output_data_got_powerpc
<size
, big_endian
>* got
5988 = target
->got_section(symtab
, layout
);
5989 if (parameters
->options().output_is_position_independent())
5991 Address off
= reloc
.get_r_offset();
5993 && data_shndx
== ppc_object
->opd_shndx()
5994 && ppc_object
->get_opd_discard(off
- 8))
5997 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5998 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5999 if (data_shndx
!= ppc_object
->opd_shndx())
6000 symobj
= static_cast
6001 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6002 rela_dyn
->add_output_section_relative(got
->output_section(),
6003 elfcpp::R_POWERPC_RELATIVE
,
6005 object
, data_shndx
, off
,
6006 symobj
->toc_base_offset());
6011 case elfcpp::R_PPC64_ADDR64
:
6013 && target
->abiversion() < 2
6014 && data_shndx
== ppc_object
->opd_shndx()
6015 && (gsym
->is_defined_in_discarded_section()
6016 || gsym
->object() != object
))
6018 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6022 case elfcpp::R_PPC64_UADDR64
:
6023 case elfcpp::R_POWERPC_ADDR32
:
6024 case elfcpp::R_POWERPC_UADDR32
:
6025 case elfcpp::R_POWERPC_ADDR24
:
6026 case elfcpp::R_POWERPC_ADDR16
:
6027 case elfcpp::R_POWERPC_ADDR16_LO
:
6028 case elfcpp::R_POWERPC_ADDR16_HI
:
6029 case elfcpp::R_POWERPC_ADDR16_HA
:
6030 case elfcpp::R_POWERPC_UADDR16
:
6031 case elfcpp::R_PPC64_ADDR16_HIGH
:
6032 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6033 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6034 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6035 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6036 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6037 case elfcpp::R_PPC64_ADDR16_DS
:
6038 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6039 case elfcpp::R_POWERPC_ADDR14
:
6040 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6041 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6043 // Make a PLT entry if necessary.
6044 if (gsym
->needs_plt_entry())
6046 // Since this is not a PC-relative relocation, we may be
6047 // taking the address of a function. In that case we need to
6048 // set the entry in the dynamic symbol table to the address of
6049 // the PLT call stub.
6050 bool need_ifunc_plt
= false;
6051 if ((size
== 32 || target
->abiversion() >= 2)
6052 && gsym
->is_from_dynobj()
6053 && !parameters
->options().output_is_position_independent())
6055 gsym
->set_needs_dynsym_value();
6056 need_ifunc_plt
= true;
6058 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6060 target
->push_branch(ppc_object
, data_shndx
,
6061 reloc
.get_r_offset(), r_type
,
6062 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6063 reloc
.get_r_addend());
6064 target
->make_plt_entry(symtab
, layout
, gsym
);
6067 // Make a dynamic relocation if necessary.
6068 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6069 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6071 if (!parameters
->options().output_is_position_independent()
6072 && gsym
->may_need_copy_reloc())
6074 target
->copy_reloc(symtab
, layout
, object
,
6075 data_shndx
, output_section
, gsym
, reloc
);
6077 else if ((((size
== 32
6078 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6080 && r_type
== elfcpp::R_PPC64_ADDR64
6081 && target
->abiversion() >= 2))
6082 && gsym
->can_use_relative_reloc(false)
6083 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6084 && parameters
->options().shared()))
6086 && r_type
== elfcpp::R_PPC64_ADDR64
6087 && target
->abiversion() < 2
6088 && (gsym
->can_use_relative_reloc(false)
6089 || data_shndx
== ppc_object
->opd_shndx())))
6091 Reloc_section
* rela_dyn
6092 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6093 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6094 : elfcpp::R_POWERPC_RELATIVE
);
6095 rela_dyn
->add_symbolless_global_addend(
6096 gsym
, dynrel
, output_section
, object
, data_shndx
,
6097 reloc
.get_r_offset(), reloc
.get_r_addend());
6101 Reloc_section
* rela_dyn
6102 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6103 check_non_pic(object
, r_type
);
6104 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6106 reloc
.get_r_offset(),
6107 reloc
.get_r_addend());
6113 case elfcpp::R_PPC_PLTREL24
:
6114 case elfcpp::R_POWERPC_REL24
:
6117 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6119 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6120 reloc
.get_r_addend());
6121 if (gsym
->needs_plt_entry()
6122 || (!gsym
->final_value_is_known()
6123 && (gsym
->is_undefined()
6124 || gsym
->is_from_dynobj()
6125 || gsym
->is_preemptible())))
6126 target
->make_plt_entry(symtab
, layout
, gsym
);
6130 case elfcpp::R_PPC64_REL64
:
6131 case elfcpp::R_POWERPC_REL32
:
6132 // Make a dynamic relocation if necessary.
6133 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6135 if (!parameters
->options().output_is_position_independent()
6136 && gsym
->may_need_copy_reloc())
6138 target
->copy_reloc(symtab
, layout
, object
,
6139 data_shndx
, output_section
, gsym
,
6144 Reloc_section
* rela_dyn
6145 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6146 check_non_pic(object
, r_type
);
6147 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6148 data_shndx
, reloc
.get_r_offset(),
6149 reloc
.get_r_addend());
6154 case elfcpp::R_POWERPC_REL14
:
6155 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6156 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6158 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6159 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6160 reloc
.get_r_addend());
6163 case elfcpp::R_POWERPC_REL16
:
6164 case elfcpp::R_POWERPC_REL16_LO
:
6165 case elfcpp::R_POWERPC_REL16_HI
:
6166 case elfcpp::R_POWERPC_REL16_HA
:
6167 case elfcpp::R_POWERPC_REL16DX_HA
:
6168 case elfcpp::R_POWERPC_SECTOFF
:
6169 case elfcpp::R_POWERPC_SECTOFF_LO
:
6170 case elfcpp::R_POWERPC_SECTOFF_HI
:
6171 case elfcpp::R_POWERPC_SECTOFF_HA
:
6172 case elfcpp::R_PPC64_SECTOFF_DS
:
6173 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6174 case elfcpp::R_POWERPC_TPREL16
:
6175 case elfcpp::R_POWERPC_TPREL16_LO
:
6176 case elfcpp::R_POWERPC_TPREL16_HI
:
6177 case elfcpp::R_POWERPC_TPREL16_HA
:
6178 case elfcpp::R_PPC64_TPREL16_DS
:
6179 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6180 case elfcpp::R_PPC64_TPREL16_HIGH
:
6181 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6182 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6183 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6184 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6185 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6186 case elfcpp::R_POWERPC_DTPREL16
:
6187 case elfcpp::R_POWERPC_DTPREL16_LO
:
6188 case elfcpp::R_POWERPC_DTPREL16_HI
:
6189 case elfcpp::R_POWERPC_DTPREL16_HA
:
6190 case elfcpp::R_PPC64_DTPREL16_DS
:
6191 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6192 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6193 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6194 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6195 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6196 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6197 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6198 case elfcpp::R_PPC64_TLSGD
:
6199 case elfcpp::R_PPC64_TLSLD
:
6200 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6203 case elfcpp::R_POWERPC_GOT16
:
6204 case elfcpp::R_POWERPC_GOT16_LO
:
6205 case elfcpp::R_POWERPC_GOT16_HI
:
6206 case elfcpp::R_POWERPC_GOT16_HA
:
6207 case elfcpp::R_PPC64_GOT16_DS
:
6208 case elfcpp::R_PPC64_GOT16_LO_DS
:
6210 // The symbol requires a GOT entry.
6211 Output_data_got_powerpc
<size
, big_endian
>* got
;
6213 got
= target
->got_section(symtab
, layout
);
6214 if (gsym
->final_value_is_known())
6217 && (size
== 32 || target
->abiversion() >= 2))
6218 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6220 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6222 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6224 // If we are generating a shared object or a pie, this
6225 // symbol's GOT entry will be set by a dynamic relocation.
6226 unsigned int off
= got
->add_constant(0);
6227 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6229 Reloc_section
* rela_dyn
6230 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6232 if (gsym
->can_use_relative_reloc(false)
6234 || target
->abiversion() >= 2)
6235 && gsym
->visibility() == elfcpp::STV_PROTECTED
6236 && parameters
->options().shared()))
6238 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6239 : elfcpp::R_POWERPC_RELATIVE
);
6240 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6244 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6245 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6251 case elfcpp::R_PPC64_TOC16
:
6252 case elfcpp::R_PPC64_TOC16_LO
:
6253 case elfcpp::R_PPC64_TOC16_HI
:
6254 case elfcpp::R_PPC64_TOC16_HA
:
6255 case elfcpp::R_PPC64_TOC16_DS
:
6256 case elfcpp::R_PPC64_TOC16_LO_DS
:
6257 // We need a GOT section.
6258 target
->got_section(symtab
, layout
);
6261 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6262 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6263 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6264 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6266 const bool final
= gsym
->final_value_is_known();
6267 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6268 if (tls_type
== tls::TLSOPT_NONE
)
6270 Output_data_got_powerpc
<size
, big_endian
>* got
6271 = target
->got_section(symtab
, layout
);
6272 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6273 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6274 elfcpp::R_POWERPC_DTPMOD
,
6275 elfcpp::R_POWERPC_DTPREL
);
6277 else if (tls_type
== tls::TLSOPT_TO_IE
)
6279 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6281 Output_data_got_powerpc
<size
, big_endian
>* got
6282 = target
->got_section(symtab
, layout
);
6283 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6284 if (gsym
->is_undefined()
6285 || gsym
->is_from_dynobj())
6287 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6288 elfcpp::R_POWERPC_TPREL
);
6292 unsigned int off
= got
->add_constant(0);
6293 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6294 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6295 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6300 else if (tls_type
== tls::TLSOPT_TO_LE
)
6302 // no GOT relocs needed for Local Exec.
6309 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6310 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6311 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6312 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6314 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6315 if (tls_type
== tls::TLSOPT_NONE
)
6316 target
->tlsld_got_offset(symtab
, layout
, object
);
6317 else if (tls_type
== tls::TLSOPT_TO_LE
)
6319 // no GOT relocs needed for Local Exec.
6320 if (parameters
->options().emit_relocs())
6322 Output_section
* os
= layout
->tls_segment()->first_section();
6323 gold_assert(os
!= NULL
);
6324 os
->set_needs_symtab_index();
6332 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6333 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6334 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6335 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6337 Output_data_got_powerpc
<size
, big_endian
>* got
6338 = target
->got_section(symtab
, layout
);
6339 if (!gsym
->final_value_is_known()
6340 && (gsym
->is_from_dynobj()
6341 || gsym
->is_undefined()
6342 || gsym
->is_preemptible()))
6343 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6344 target
->rela_dyn_section(layout
),
6345 elfcpp::R_POWERPC_DTPREL
);
6347 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6351 case elfcpp::R_POWERPC_GOT_TPREL16
:
6352 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6353 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6354 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6356 const bool final
= gsym
->final_value_is_known();
6357 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6358 if (tls_type
== tls::TLSOPT_NONE
)
6360 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6362 Output_data_got_powerpc
<size
, big_endian
>* got
6363 = target
->got_section(symtab
, layout
);
6364 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6365 if (gsym
->is_undefined()
6366 || gsym
->is_from_dynobj())
6368 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6369 elfcpp::R_POWERPC_TPREL
);
6373 unsigned int off
= got
->add_constant(0);
6374 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6375 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6376 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6381 else if (tls_type
== tls::TLSOPT_TO_LE
)
6383 // no GOT relocs needed for Local Exec.
6391 unsupported_reloc_global(object
, r_type
, gsym
);
6397 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6398 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6399 case elfcpp::R_POWERPC_GOT_TPREL16
:
6400 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6401 case elfcpp::R_POWERPC_GOT16
:
6402 case elfcpp::R_PPC64_GOT16_DS
:
6403 case elfcpp::R_PPC64_TOC16
:
6404 case elfcpp::R_PPC64_TOC16_DS
:
6405 ppc_object
->set_has_small_toc_reloc();
6411 // Process relocations for gc.
6413 template<int size
, bool big_endian
>
6415 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6416 Symbol_table
* symtab
,
6418 Sized_relobj_file
<size
, big_endian
>* object
,
6419 unsigned int data_shndx
,
6421 const unsigned char* prelocs
,
6423 Output_section
* output_section
,
6424 bool needs_special_offset_handling
,
6425 size_t local_symbol_count
,
6426 const unsigned char* plocal_symbols
)
6428 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6429 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6430 Powerpc_relobj
<size
, big_endian
>* ppc_object
6431 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6433 ppc_object
->set_opd_valid();
6434 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6436 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6437 for (p
= ppc_object
->access_from_map()->begin();
6438 p
!= ppc_object
->access_from_map()->end();
6441 Address dst_off
= p
->first
;
6442 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6443 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6444 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6446 Relobj
* src_obj
= s
->first
;
6447 unsigned int src_indx
= s
->second
;
6448 symtab
->gc()->add_reference(src_obj
, src_indx
,
6449 ppc_object
, dst_indx
);
6453 ppc_object
->access_from_map()->clear();
6454 ppc_object
->process_gc_mark(symtab
);
6455 // Don't look at .opd relocs as .opd will reference everything.
6459 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
6460 typename
Target_powerpc::Relocatable_size_for_reloc
>(
6469 needs_special_offset_handling
,
6474 // Handle target specific gc actions when adding a gc reference from
6475 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6476 // and DST_OFF. For powerpc64, this adds a referenc to the code
6477 // section of a function descriptor.
6479 template<int size
, bool big_endian
>
6481 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6482 Symbol_table
* symtab
,
6484 unsigned int src_shndx
,
6486 unsigned int dst_shndx
,
6487 Address dst_off
) const
6489 if (size
!= 64 || dst_obj
->is_dynamic())
6492 Powerpc_relobj
<size
, big_endian
>* ppc_object
6493 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6494 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6496 if (ppc_object
->opd_valid())
6498 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6499 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6503 // If we haven't run scan_opd_relocs, we must delay
6504 // processing this function descriptor reference.
6505 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6510 // Add any special sections for this symbol to the gc work list.
6511 // For powerpc64, this adds the code section of a function
6514 template<int size
, bool big_endian
>
6516 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6517 Symbol_table
* symtab
,
6522 Powerpc_relobj
<size
, big_endian
>* ppc_object
6523 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6525 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6526 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6528 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6529 Address dst_off
= gsym
->value();
6530 if (ppc_object
->opd_valid())
6532 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6533 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
6537 ppc_object
->add_gc_mark(dst_off
);
6542 // For a symbol location in .opd, set LOC to the location of the
6545 template<int size
, bool big_endian
>
6547 Target_powerpc
<size
, big_endian
>::do_function_location(
6548 Symbol_location
* loc
) const
6550 if (size
== 64 && loc
->shndx
!= 0)
6552 if (loc
->object
->is_dynamic())
6554 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6555 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6556 if (loc
->shndx
== ppc_object
->opd_shndx())
6559 Address off
= loc
->offset
- ppc_object
->opd_address();
6560 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6561 loc
->offset
= dest_off
;
6566 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6567 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6568 if (loc
->shndx
== ppc_object
->opd_shndx())
6571 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6572 loc
->offset
= dest_off
;
6578 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6579 // compiled with -fsplit-stack. The function calls non-split-stack
6580 // code. Change the function to ensure it has enough stack space to
6581 // call some random function.
6583 template<int size
, bool big_endian
>
6585 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
6588 section_offset_type fnoffset
,
6589 section_size_type fnsize
,
6590 unsigned char* view
,
6591 section_size_type view_size
,
6593 std::string
* to
) const
6595 // 32-bit not supported.
6599 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
6600 view
, view_size
, from
, to
);
6604 // The function always starts with
6605 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6606 // addis %r12,%r1,-allocate@ha
6607 // addi %r12,%r12,-allocate@l
6609 // but note that the addis or addi may be replaced with a nop
6611 unsigned char *entry
= view
+ fnoffset
;
6612 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6614 if ((insn
& 0xffff0000) == addis_2_12
)
6616 /* Skip ELFv2 global entry code. */
6618 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6621 unsigned char *pinsn
= entry
;
6623 const uint32_t ld_private_ss
= 0xe80d8fc0;
6624 if (insn
== ld_private_ss
)
6626 int32_t allocate
= 0;
6630 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
6631 if ((insn
& 0xffff0000) == addis_12_1
)
6632 allocate
+= (insn
& 0xffff) << 16;
6633 else if ((insn
& 0xffff0000) == addi_12_1
6634 || (insn
& 0xffff0000) == addi_12_12
)
6635 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
6636 else if (insn
!= nop
)
6639 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
6641 int extra
= parameters
->options().split_stack_adjust_size();
6643 if (allocate
>= 0 || extra
< 0)
6645 object
->error(_("split-stack stack size overflow at "
6646 "section %u offset %0zx"),
6647 shndx
, static_cast<size_t>(fnoffset
));
6651 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
6652 if (insn
!= addis_12_1
)
6654 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6656 insn
= addi_12_12
| (allocate
& 0xffff);
6657 if (insn
!= addi_12_12
)
6659 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6665 insn
= addi_12_1
| (allocate
& 0xffff);
6666 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6669 if (pinsn
!= entry
+ 12)
6670 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
6678 if (!object
->has_no_split_stack())
6679 object
->error(_("failed to match split-stack sequence at "
6680 "section %u offset %0zx"),
6681 shndx
, static_cast<size_t>(fnoffset
));
6685 // Scan relocations for a section.
6687 template<int size
, bool big_endian
>
6689 Target_powerpc
<size
, big_endian
>::scan_relocs(
6690 Symbol_table
* symtab
,
6692 Sized_relobj_file
<size
, big_endian
>* object
,
6693 unsigned int data_shndx
,
6694 unsigned int sh_type
,
6695 const unsigned char* prelocs
,
6697 Output_section
* output_section
,
6698 bool needs_special_offset_handling
,
6699 size_t local_symbol_count
,
6700 const unsigned char* plocal_symbols
)
6702 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6703 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6705 if (sh_type
== elfcpp::SHT_REL
)
6707 gold_error(_("%s: unsupported REL reloc section"),
6708 object
->name().c_str());
6712 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
6721 needs_special_offset_handling
,
6726 // Functor class for processing the global symbol table.
6727 // Removes symbols defined on discarded opd entries.
6729 template<bool big_endian
>
6730 class Global_symbol_visitor_opd
6733 Global_symbol_visitor_opd()
6737 operator()(Sized_symbol
<64>* sym
)
6739 if (sym
->has_symtab_index()
6740 || sym
->source() != Symbol::FROM_OBJECT
6741 || !sym
->in_real_elf())
6744 if (sym
->object()->is_dynamic())
6747 Powerpc_relobj
<64, big_endian
>* symobj
6748 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6749 if (symobj
->opd_shndx() == 0)
6753 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6754 if (shndx
== symobj
->opd_shndx()
6755 && symobj
->get_opd_discard(sym
->value()))
6757 sym
->set_undefined();
6758 sym
->set_visibility(elfcpp::STV_DEFAULT
);
6759 sym
->set_is_defined_in_discarded_section();
6760 sym
->set_symtab_index(-1U);
6765 template<int size
, bool big_endian
>
6767 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6769 Symbol_table
* symtab
)
6773 Output_data_save_res
<size
, big_endian
>* savres
6774 = new Output_data_save_res
<size
, big_endian
>(symtab
);
6775 this->savres_section_
= savres
;
6776 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6777 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6778 savres
, ORDER_TEXT
, false);
6782 // Sort linker created .got section first (for the header), then input
6783 // sections belonging to files using small model code.
6785 template<bool big_endian
>
6786 class Sort_toc_sections
6790 operator()(const Output_section::Input_section
& is1
,
6791 const Output_section::Input_section
& is2
) const
6793 if (!is1
.is_input_section() && is2
.is_input_section())
6796 = (is1
.is_input_section()
6797 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6798 ->has_small_toc_reloc()));
6800 = (is2
.is_input_section()
6801 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6802 ->has_small_toc_reloc()));
6803 return small1
&& !small2
;
6807 // Finalize the sections.
6809 template<int size
, bool big_endian
>
6811 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6813 const Input_objects
*,
6814 Symbol_table
* symtab
)
6816 if (parameters
->doing_static_link())
6818 // At least some versions of glibc elf-init.o have a strong
6819 // reference to __rela_iplt marker syms. A weak ref would be
6821 if (this->iplt_
!= NULL
)
6823 Reloc_section
* rel
= this->iplt_
->rel_plt();
6824 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6825 Symbol_table::PREDEFINED
, rel
, 0, 0,
6826 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6827 elfcpp::STV_HIDDEN
, 0, false, true);
6828 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6829 Symbol_table::PREDEFINED
, rel
, 0, 0,
6830 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6831 elfcpp::STV_HIDDEN
, 0, true, true);
6835 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6836 Symbol_table::PREDEFINED
, 0, 0,
6837 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6838 elfcpp::STV_HIDDEN
, 0, true, false);
6839 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6840 Symbol_table::PREDEFINED
, 0, 0,
6841 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6842 elfcpp::STV_HIDDEN
, 0, true, false);
6848 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6849 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6851 if (!parameters
->options().relocatable())
6853 this->define_save_restore_funcs(layout
, symtab
);
6855 // Annoyingly, we need to make these sections now whether or
6856 // not we need them. If we delay until do_relax then we
6857 // need to mess with the relaxation machinery checkpointing.
6858 this->got_section(symtab
, layout
);
6859 this->make_brlt_section(layout
);
6861 if (parameters
->options().toc_sort())
6863 Output_section
* os
= this->got_
->output_section();
6864 if (os
!= NULL
&& os
->input_sections().size() > 1)
6865 std::stable_sort(os
->input_sections().begin(),
6866 os
->input_sections().end(),
6867 Sort_toc_sections
<big_endian
>());
6872 // Fill in some more dynamic tags.
6873 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6876 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6878 : this->plt_
->rel_plt());
6879 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6880 this->rela_dyn_
, true, size
== 32);
6884 if (this->got_
!= NULL
)
6886 this->got_
->finalize_data_size();
6887 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6888 this->got_
, this->got_
->g_o_t());
6893 if (this->glink_
!= NULL
)
6895 this->glink_
->finalize_data_size();
6896 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6898 (this->glink_
->pltresolve_size
6904 // Emit any relocs we saved in an attempt to avoid generating COPY
6906 if (this->copy_relocs_
.any_saved_relocs())
6907 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6910 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6914 ok_lo_toc_insn(uint32_t insn
)
6916 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6917 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6918 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6919 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6920 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6921 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6922 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6923 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6924 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6925 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6926 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6927 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6928 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6929 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6930 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6932 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6933 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6934 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6937 // Return the value to use for a branch relocation.
6939 template<int size
, bool big_endian
>
6941 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6942 const Symbol_table
* symtab
,
6943 const Sized_symbol
<size
>* gsym
,
6944 Powerpc_relobj
<size
, big_endian
>* object
,
6946 unsigned int *dest_shndx
)
6948 if (size
== 32 || this->abiversion() >= 2)
6952 // If the symbol is defined in an opd section, ie. is a function
6953 // descriptor, use the function descriptor code entry address
6954 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6956 && gsym
->source() != Symbol::FROM_OBJECT
)
6959 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6960 unsigned int shndx
= symobj
->opd_shndx();
6963 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6964 if (opd_addr
== invalid_address
)
6966 opd_addr
+= symobj
->output_section_address(shndx
);
6967 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
6970 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
6971 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6974 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6975 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6976 *dest_shndx
= folded
.second
;
6978 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6979 if (sec_addr
== invalid_address
)
6982 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6983 *value
= sec_addr
+ sec_off
;
6988 // Perform a relocation.
6990 template<int size
, bool big_endian
>
6992 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6993 const Relocate_info
<size
, big_endian
>* relinfo
,
6994 Target_powerpc
* target
,
6997 const elfcpp::Rela
<size
, big_endian
>& rela
,
6998 unsigned int r_type
,
6999 const Sized_symbol
<size
>* gsym
,
7000 const Symbol_value
<size
>* psymval
,
7001 unsigned char* view
,
7003 section_size_type view_size
)
7008 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7010 case Track_tls::NOT_EXPECTED
:
7011 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7012 _("__tls_get_addr call lacks marker reloc"));
7014 case Track_tls::EXPECTED
:
7015 // We have already complained.
7017 case Track_tls::SKIP
:
7019 case Track_tls::NORMAL
:
7023 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
7024 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
7025 Powerpc_relobj
<size
, big_endian
>* const object
7026 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7028 bool has_stub_value
= false;
7029 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7031 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7032 : object
->local_has_plt_offset(r_sym
))
7033 && (!psymval
->is_ifunc_symbol()
7034 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7038 && target
->abiversion() >= 2
7039 && !parameters
->options().output_is_position_independent()
7040 && !is_branch_reloc(r_type
))
7042 Address off
= target
->glink_section()->find_global_entry(gsym
);
7043 if (off
!= invalid_address
)
7045 value
= target
->glink_section()->global_entry_address() + off
;
7046 has_stub_value
= true;
7051 Stub_table
<size
, big_endian
>* stub_table
7052 = object
->stub_table(relinfo
->data_shndx
);
7053 if (stub_table
== NULL
)
7055 // This is a ref from a data section to an ifunc symbol.
7056 if (target
->stub_tables().size() != 0)
7057 stub_table
= target
->stub_tables()[0];
7059 if (stub_table
!= NULL
)
7063 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7064 rela
.get_r_addend());
7066 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7067 rela
.get_r_addend());
7068 if (off
!= invalid_address
)
7070 value
= stub_table
->stub_address() + off
;
7071 has_stub_value
= true;
7075 // We don't care too much about bogus debug references to
7076 // non-local functions, but otherwise there had better be a plt
7077 // call stub or global entry stub as appropriate.
7078 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7081 if (r_type
== elfcpp::R_POWERPC_GOT16
7082 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7083 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7084 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7085 || r_type
== elfcpp::R_PPC64_GOT16_DS
7086 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7090 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7091 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7095 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7096 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7097 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7099 value
-= target
->got_section()->got_base_offset(object
);
7101 else if (r_type
== elfcpp::R_PPC64_TOC
)
7103 value
= (target
->got_section()->output_section()->address()
7104 + object
->toc_base_offset());
7106 else if (gsym
!= NULL
7107 && (r_type
== elfcpp::R_POWERPC_REL24
7108 || r_type
== elfcpp::R_PPC_PLTREL24
)
7113 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7114 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7115 bool can_plt_call
= false;
7116 if (rela
.get_r_offset() + 8 <= view_size
)
7118 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7119 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7122 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7124 elfcpp::Swap
<32, big_endian
>::
7125 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7126 can_plt_call
= true;
7131 // If we don't have a branch and link followed by a nop,
7132 // we can't go via the plt because there is no place to
7133 // put a toc restoring instruction.
7134 // Unless we know we won't be returning.
7135 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7136 can_plt_call
= true;
7140 // g++ as of 20130507 emits self-calls without a
7141 // following nop. This is arguably wrong since we have
7142 // conflicting information. On the one hand a global
7143 // symbol and on the other a local call sequence, but
7144 // don't error for this special case.
7145 // It isn't possible to cheaply verify we have exactly
7146 // such a call. Allow all calls to the same section.
7148 Address code
= value
;
7149 if (gsym
->source() == Symbol::FROM_OBJECT
7150 && gsym
->object() == object
)
7152 unsigned int dest_shndx
= 0;
7153 if (target
->abiversion() < 2)
7155 Address addend
= rela
.get_r_addend();
7156 code
= psymval
->value(object
, addend
);
7157 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7158 &code
, &dest_shndx
);
7161 if (dest_shndx
== 0)
7162 dest_shndx
= gsym
->shndx(&is_ordinary
);
7163 ok
= dest_shndx
== relinfo
->data_shndx
;
7167 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7168 _("call lacks nop, can't restore toc; "
7169 "recompile with -fPIC"));
7175 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7176 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7177 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7178 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7180 // First instruction of a global dynamic sequence, arg setup insn.
7181 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7182 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7183 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7184 if (tls_type
== tls::TLSOPT_NONE
)
7185 got_type
= GOT_TYPE_TLSGD
;
7186 else if (tls_type
== tls::TLSOPT_TO_IE
)
7187 got_type
= GOT_TYPE_TPREL
;
7188 if (got_type
!= GOT_TYPE_STANDARD
)
7192 gold_assert(gsym
->has_got_offset(got_type
));
7193 value
= gsym
->got_offset(got_type
);
7197 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7198 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7199 value
= object
->local_got_offset(r_sym
, got_type
);
7201 value
-= target
->got_section()->got_base_offset(object
);
7203 if (tls_type
== tls::TLSOPT_TO_IE
)
7205 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7206 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7208 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7209 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7210 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7212 insn
|= 32 << 26; // lwz
7214 insn
|= 58 << 26; // ld
7215 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7217 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7218 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7220 else if (tls_type
== tls::TLSOPT_TO_LE
)
7222 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7223 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7225 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7226 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7227 insn
&= (1 << 26) - (1 << 21); // extract rt
7232 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7233 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7234 value
= psymval
->value(object
, rela
.get_r_addend());
7238 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7240 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7241 r_type
= elfcpp::R_POWERPC_NONE
;
7245 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7246 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7247 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7248 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7250 // First instruction of a local dynamic sequence, arg setup insn.
7251 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7252 if (tls_type
== tls::TLSOPT_NONE
)
7254 value
= target
->tlsld_got_offset();
7255 value
-= target
->got_section()->got_base_offset(object
);
7259 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7260 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7261 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7263 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7264 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7265 insn
&= (1 << 26) - (1 << 21); // extract rt
7270 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7271 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7276 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7278 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7279 r_type
= elfcpp::R_POWERPC_NONE
;
7283 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7284 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7285 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7286 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7288 // Accesses relative to a local dynamic sequence address,
7289 // no optimisation here.
7292 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7293 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7297 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7298 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7299 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7301 value
-= target
->got_section()->got_base_offset(object
);
7303 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7304 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7305 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7306 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7308 // First instruction of initial exec sequence.
7309 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7310 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7311 if (tls_type
== tls::TLSOPT_NONE
)
7315 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7316 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7320 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7321 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7322 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7324 value
-= target
->got_section()->got_base_offset(object
);
7328 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7329 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7330 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7332 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7333 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7334 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7339 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7340 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7341 value
= psymval
->value(object
, rela
.get_r_addend());
7345 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7347 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7348 r_type
= elfcpp::R_POWERPC_NONE
;
7352 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7353 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7355 // Second instruction of a global dynamic sequence,
7356 // the __tls_get_addr call
7357 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7358 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7359 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7360 if (tls_type
!= tls::TLSOPT_NONE
)
7362 if (tls_type
== tls::TLSOPT_TO_IE
)
7364 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7365 Insn insn
= add_3_3_13
;
7368 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7369 r_type
= elfcpp::R_POWERPC_NONE
;
7373 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7374 Insn insn
= addi_3_3
;
7375 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7376 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7377 view
+= 2 * big_endian
;
7378 value
= psymval
->value(object
, rela
.get_r_addend());
7380 this->skip_next_tls_get_addr_call();
7383 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7384 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7386 // Second instruction of a local dynamic sequence,
7387 // the __tls_get_addr call
7388 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7389 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7390 if (tls_type
== tls::TLSOPT_TO_LE
)
7392 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7393 Insn insn
= addi_3_3
;
7394 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7395 this->skip_next_tls_get_addr_call();
7396 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7397 view
+= 2 * big_endian
;
7401 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7403 // Second instruction of an initial exec sequence
7404 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7405 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7406 if (tls_type
== tls::TLSOPT_TO_LE
)
7408 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7409 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7410 unsigned int reg
= size
== 32 ? 2 : 13;
7411 insn
= at_tls_transform(insn
, reg
);
7412 gold_assert(insn
!= 0);
7413 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7414 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7415 view
+= 2 * big_endian
;
7416 value
= psymval
->value(object
, rela
.get_r_addend());
7419 else if (!has_stub_value
)
7422 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
7423 addend
= rela
.get_r_addend();
7424 value
= psymval
->value(object
, addend
);
7425 if (size
== 64 && is_branch_reloc(r_type
))
7427 if (target
->abiversion() >= 2)
7430 value
+= object
->ppc64_local_entry_offset(gsym
);
7432 value
+= object
->ppc64_local_entry_offset(r_sym
);
7436 unsigned int dest_shndx
;
7437 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7438 &value
, &dest_shndx
);
7441 Address max_branch_offset
= max_branch_delta(r_type
);
7442 if (max_branch_offset
!= 0
7443 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7445 Stub_table
<size
, big_endian
>* stub_table
7446 = object
->stub_table(relinfo
->data_shndx
);
7447 if (stub_table
!= NULL
)
7449 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7450 if (off
!= invalid_address
)
7452 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7454 has_stub_value
= true;
7462 case elfcpp::R_PPC64_REL64
:
7463 case elfcpp::R_POWERPC_REL32
:
7464 case elfcpp::R_POWERPC_REL24
:
7465 case elfcpp::R_PPC_PLTREL24
:
7466 case elfcpp::R_PPC_LOCAL24PC
:
7467 case elfcpp::R_POWERPC_REL16
:
7468 case elfcpp::R_POWERPC_REL16_LO
:
7469 case elfcpp::R_POWERPC_REL16_HI
:
7470 case elfcpp::R_POWERPC_REL16_HA
:
7471 case elfcpp::R_POWERPC_REL16DX_HA
:
7472 case elfcpp::R_POWERPC_REL14
:
7473 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7474 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7478 case elfcpp::R_PPC64_TOC16
:
7479 case elfcpp::R_PPC64_TOC16_LO
:
7480 case elfcpp::R_PPC64_TOC16_HI
:
7481 case elfcpp::R_PPC64_TOC16_HA
:
7482 case elfcpp::R_PPC64_TOC16_DS
:
7483 case elfcpp::R_PPC64_TOC16_LO_DS
:
7484 // Subtract the TOC base address.
7485 value
-= (target
->got_section()->output_section()->address()
7486 + object
->toc_base_offset());
7489 case elfcpp::R_POWERPC_SECTOFF
:
7490 case elfcpp::R_POWERPC_SECTOFF_LO
:
7491 case elfcpp::R_POWERPC_SECTOFF_HI
:
7492 case elfcpp::R_POWERPC_SECTOFF_HA
:
7493 case elfcpp::R_PPC64_SECTOFF_DS
:
7494 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7496 value
-= os
->address();
7499 case elfcpp::R_PPC64_TPREL16_DS
:
7500 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7501 case elfcpp::R_PPC64_TPREL16_HIGH
:
7502 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7504 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7506 case elfcpp::R_POWERPC_TPREL16
:
7507 case elfcpp::R_POWERPC_TPREL16_LO
:
7508 case elfcpp::R_POWERPC_TPREL16_HI
:
7509 case elfcpp::R_POWERPC_TPREL16_HA
:
7510 case elfcpp::R_POWERPC_TPREL
:
7511 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7512 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7513 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7514 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7515 // tls symbol values are relative to tls_segment()->vaddr()
7519 case elfcpp::R_PPC64_DTPREL16_DS
:
7520 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7521 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7522 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7523 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7524 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7526 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7527 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7529 case elfcpp::R_POWERPC_DTPREL16
:
7530 case elfcpp::R_POWERPC_DTPREL16_LO
:
7531 case elfcpp::R_POWERPC_DTPREL16_HI
:
7532 case elfcpp::R_POWERPC_DTPREL16_HA
:
7533 case elfcpp::R_POWERPC_DTPREL
:
7534 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7535 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7536 // tls symbol values are relative to tls_segment()->vaddr()
7537 value
-= dtp_offset
;
7540 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7542 value
+= object
->ppc64_local_entry_offset(gsym
);
7544 value
+= object
->ppc64_local_entry_offset(r_sym
);
7551 Insn branch_bit
= 0;
7554 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7555 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7556 branch_bit
= 1 << 21;
7557 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7558 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7560 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7561 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7564 if (this->is_isa_v2
)
7566 // Set 'a' bit. This is 0b00010 in BO field for branch
7567 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7568 // for branch on CTR insns (BO == 1a00t or 1a01t).
7569 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7571 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7578 // Invert 'y' bit if not the default.
7579 if (static_cast<Signed_address
>(value
) < 0)
7582 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7592 // Multi-instruction sequences that access the TOC can be
7593 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7594 // to nop; addi rb,r2,x;
7600 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7601 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7602 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7603 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7604 case elfcpp::R_POWERPC_GOT16_HA
:
7605 case elfcpp::R_PPC64_TOC16_HA
:
7606 if (parameters
->options().toc_optimize())
7608 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7609 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7610 if ((insn
& ((0x3f << 26) | 0x1f << 16))
7611 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7612 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7613 _("toc optimization is not supported "
7614 "for %#08x instruction"), insn
);
7615 else if (value
+ 0x8000 < 0x10000)
7617 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7623 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7624 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7625 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7626 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7627 case elfcpp::R_POWERPC_GOT16_LO
:
7628 case elfcpp::R_PPC64_GOT16_LO_DS
:
7629 case elfcpp::R_PPC64_TOC16_LO
:
7630 case elfcpp::R_PPC64_TOC16_LO_DS
:
7631 if (parameters
->options().toc_optimize())
7633 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7634 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7635 if (!ok_lo_toc_insn(insn
))
7636 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7637 _("toc optimization is not supported "
7638 "for %#08x instruction"), insn
);
7639 else if (value
+ 0x8000 < 0x10000)
7641 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7643 // Transform addic to addi when we change reg.
7644 insn
&= ~((0x3f << 26) | (0x1f << 16));
7645 insn
|= (14u << 26) | (2 << 16);
7649 insn
&= ~(0x1f << 16);
7652 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7659 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7660 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
7663 case elfcpp::R_POWERPC_ADDR32
:
7664 case elfcpp::R_POWERPC_UADDR32
:
7666 overflow
= Reloc::CHECK_BITFIELD
;
7669 case elfcpp::R_POWERPC_REL32
:
7670 case elfcpp::R_POWERPC_REL16DX_HA
:
7672 overflow
= Reloc::CHECK_SIGNED
;
7675 case elfcpp::R_POWERPC_UADDR16
:
7676 overflow
= Reloc::CHECK_BITFIELD
;
7679 case elfcpp::R_POWERPC_ADDR16
:
7680 // We really should have three separate relocations,
7681 // one for 16-bit data, one for insns with 16-bit signed fields,
7682 // and one for insns with 16-bit unsigned fields.
7683 overflow
= Reloc::CHECK_BITFIELD
;
7684 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
7685 overflow
= Reloc::CHECK_LOW_INSN
;
7688 case elfcpp::R_POWERPC_ADDR16_HI
:
7689 case elfcpp::R_POWERPC_ADDR16_HA
:
7690 case elfcpp::R_POWERPC_GOT16_HI
:
7691 case elfcpp::R_POWERPC_GOT16_HA
:
7692 case elfcpp::R_POWERPC_PLT16_HI
:
7693 case elfcpp::R_POWERPC_PLT16_HA
:
7694 case elfcpp::R_POWERPC_SECTOFF_HI
:
7695 case elfcpp::R_POWERPC_SECTOFF_HA
:
7696 case elfcpp::R_PPC64_TOC16_HI
:
7697 case elfcpp::R_PPC64_TOC16_HA
:
7698 case elfcpp::R_PPC64_PLTGOT16_HI
:
7699 case elfcpp::R_PPC64_PLTGOT16_HA
:
7700 case elfcpp::R_POWERPC_TPREL16_HI
:
7701 case elfcpp::R_POWERPC_TPREL16_HA
:
7702 case elfcpp::R_POWERPC_DTPREL16_HI
:
7703 case elfcpp::R_POWERPC_DTPREL16_HA
:
7704 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7705 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7706 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7707 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7708 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7709 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7710 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7711 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7712 case elfcpp::R_POWERPC_REL16_HI
:
7713 case elfcpp::R_POWERPC_REL16_HA
:
7715 overflow
= Reloc::CHECK_HIGH_INSN
;
7718 case elfcpp::R_POWERPC_REL16
:
7719 case elfcpp::R_PPC64_TOC16
:
7720 case elfcpp::R_POWERPC_GOT16
:
7721 case elfcpp::R_POWERPC_SECTOFF
:
7722 case elfcpp::R_POWERPC_TPREL16
:
7723 case elfcpp::R_POWERPC_DTPREL16
:
7724 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7725 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7726 case elfcpp::R_POWERPC_GOT_TPREL16
:
7727 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7728 overflow
= Reloc::CHECK_LOW_INSN
;
7731 case elfcpp::R_POWERPC_ADDR24
:
7732 case elfcpp::R_POWERPC_ADDR14
:
7733 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7734 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7735 case elfcpp::R_PPC64_ADDR16_DS
:
7736 case elfcpp::R_POWERPC_REL24
:
7737 case elfcpp::R_PPC_PLTREL24
:
7738 case elfcpp::R_PPC_LOCAL24PC
:
7739 case elfcpp::R_PPC64_TPREL16_DS
:
7740 case elfcpp::R_PPC64_DTPREL16_DS
:
7741 case elfcpp::R_PPC64_TOC16_DS
:
7742 case elfcpp::R_PPC64_GOT16_DS
:
7743 case elfcpp::R_PPC64_SECTOFF_DS
:
7744 case elfcpp::R_POWERPC_REL14
:
7745 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7746 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7747 overflow
= Reloc::CHECK_SIGNED
;
7751 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7754 if (overflow
== Reloc::CHECK_LOW_INSN
7755 || overflow
== Reloc::CHECK_HIGH_INSN
)
7757 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7759 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
7760 overflow
= Reloc::CHECK_BITFIELD
;
7761 else if (overflow
== Reloc::CHECK_LOW_INSN
7762 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
7763 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
7764 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
7765 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
7766 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
7767 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
7768 overflow
= Reloc::CHECK_UNSIGNED
;
7770 overflow
= Reloc::CHECK_SIGNED
;
7773 bool maybe_dq_reloc
= false;
7774 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7775 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7778 case elfcpp::R_POWERPC_NONE
:
7779 case elfcpp::R_POWERPC_TLS
:
7780 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7781 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7784 case elfcpp::R_PPC64_ADDR64
:
7785 case elfcpp::R_PPC64_REL64
:
7786 case elfcpp::R_PPC64_TOC
:
7787 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7788 Reloc::addr64(view
, value
);
7791 case elfcpp::R_POWERPC_TPREL
:
7792 case elfcpp::R_POWERPC_DTPREL
:
7794 Reloc::addr64(view
, value
);
7796 status
= Reloc::addr32(view
, value
, overflow
);
7799 case elfcpp::R_PPC64_UADDR64
:
7800 Reloc::addr64_u(view
, value
);
7803 case elfcpp::R_POWERPC_ADDR32
:
7804 status
= Reloc::addr32(view
, value
, overflow
);
7807 case elfcpp::R_POWERPC_REL32
:
7808 case elfcpp::R_POWERPC_UADDR32
:
7809 status
= Reloc::addr32_u(view
, value
, overflow
);
7812 case elfcpp::R_POWERPC_ADDR24
:
7813 case elfcpp::R_POWERPC_REL24
:
7814 case elfcpp::R_PPC_PLTREL24
:
7815 case elfcpp::R_PPC_LOCAL24PC
:
7816 status
= Reloc::addr24(view
, value
, overflow
);
7819 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7820 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7821 case elfcpp::R_POWERPC_GOT_TPREL16
:
7822 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7825 // On ppc64 these are all ds form
7826 maybe_dq_reloc
= true;
7829 case elfcpp::R_POWERPC_ADDR16
:
7830 case elfcpp::R_POWERPC_REL16
:
7831 case elfcpp::R_PPC64_TOC16
:
7832 case elfcpp::R_POWERPC_GOT16
:
7833 case elfcpp::R_POWERPC_SECTOFF
:
7834 case elfcpp::R_POWERPC_TPREL16
:
7835 case elfcpp::R_POWERPC_DTPREL16
:
7836 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7837 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7838 case elfcpp::R_POWERPC_ADDR16_LO
:
7839 case elfcpp::R_POWERPC_REL16_LO
:
7840 case elfcpp::R_PPC64_TOC16_LO
:
7841 case elfcpp::R_POWERPC_GOT16_LO
:
7842 case elfcpp::R_POWERPC_SECTOFF_LO
:
7843 case elfcpp::R_POWERPC_TPREL16_LO
:
7844 case elfcpp::R_POWERPC_DTPREL16_LO
:
7845 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7846 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7848 status
= Reloc::addr16(view
, value
, overflow
);
7850 maybe_dq_reloc
= true;
7853 case elfcpp::R_POWERPC_UADDR16
:
7854 status
= Reloc::addr16_u(view
, value
, overflow
);
7857 case elfcpp::R_PPC64_ADDR16_HIGH
:
7858 case elfcpp::R_PPC64_TPREL16_HIGH
:
7859 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7861 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7863 case elfcpp::R_POWERPC_ADDR16_HI
:
7864 case elfcpp::R_POWERPC_REL16_HI
:
7865 case elfcpp::R_PPC64_TOC16_HI
:
7866 case elfcpp::R_POWERPC_GOT16_HI
:
7867 case elfcpp::R_POWERPC_SECTOFF_HI
:
7868 case elfcpp::R_POWERPC_TPREL16_HI
:
7869 case elfcpp::R_POWERPC_DTPREL16_HI
:
7870 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7871 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7872 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7873 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7874 Reloc::addr16_hi(view
, value
);
7877 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7878 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7879 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7881 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7883 case elfcpp::R_POWERPC_ADDR16_HA
:
7884 case elfcpp::R_POWERPC_REL16_HA
:
7885 case elfcpp::R_PPC64_TOC16_HA
:
7886 case elfcpp::R_POWERPC_GOT16_HA
:
7887 case elfcpp::R_POWERPC_SECTOFF_HA
:
7888 case elfcpp::R_POWERPC_TPREL16_HA
:
7889 case elfcpp::R_POWERPC_DTPREL16_HA
:
7890 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7891 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7892 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7893 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7894 Reloc::addr16_ha(view
, value
);
7897 case elfcpp::R_POWERPC_REL16DX_HA
:
7898 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
7901 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7903 // R_PPC_EMB_NADDR16_LO
7905 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7906 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7907 Reloc::addr16_hi2(view
, value
);
7910 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7912 // R_PPC_EMB_NADDR16_HI
7914 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7915 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7916 Reloc::addr16_ha2(view
, value
);
7919 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7921 // R_PPC_EMB_NADDR16_HA
7923 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7924 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7925 Reloc::addr16_hi3(view
, value
);
7928 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7932 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7933 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7934 Reloc::addr16_ha3(view
, value
);
7937 case elfcpp::R_PPC64_DTPREL16_DS
:
7938 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7940 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7942 case elfcpp::R_PPC64_TPREL16_DS
:
7943 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7945 // R_PPC_TLSGD, R_PPC_TLSLD
7947 case elfcpp::R_PPC64_ADDR16_DS
:
7948 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7949 case elfcpp::R_PPC64_TOC16_DS
:
7950 case elfcpp::R_PPC64_TOC16_LO_DS
:
7951 case elfcpp::R_PPC64_GOT16_DS
:
7952 case elfcpp::R_PPC64_GOT16_LO_DS
:
7953 case elfcpp::R_PPC64_SECTOFF_DS
:
7954 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7955 maybe_dq_reloc
= true;
7958 case elfcpp::R_POWERPC_ADDR14
:
7959 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7960 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7961 case elfcpp::R_POWERPC_REL14
:
7962 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7963 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7964 status
= Reloc::addr14(view
, value
, overflow
);
7967 case elfcpp::R_POWERPC_COPY
:
7968 case elfcpp::R_POWERPC_GLOB_DAT
:
7969 case elfcpp::R_POWERPC_JMP_SLOT
:
7970 case elfcpp::R_POWERPC_RELATIVE
:
7971 case elfcpp::R_POWERPC_DTPMOD
:
7972 case elfcpp::R_PPC64_JMP_IREL
:
7973 case elfcpp::R_POWERPC_IRELATIVE
:
7974 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7975 _("unexpected reloc %u in object file"),
7979 case elfcpp::R_PPC_EMB_SDA21
:
7984 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7988 case elfcpp::R_PPC_EMB_SDA2I16
:
7989 case elfcpp::R_PPC_EMB_SDA2REL
:
7992 // R_PPC64_TLSGD, R_PPC64_TLSLD
7995 case elfcpp::R_POWERPC_PLT32
:
7996 case elfcpp::R_POWERPC_PLTREL32
:
7997 case elfcpp::R_POWERPC_PLT16_LO
:
7998 case elfcpp::R_POWERPC_PLT16_HI
:
7999 case elfcpp::R_POWERPC_PLT16_HA
:
8000 case elfcpp::R_PPC_SDAREL16
:
8001 case elfcpp::R_POWERPC_ADDR30
:
8002 case elfcpp::R_PPC64_PLT64
:
8003 case elfcpp::R_PPC64_PLTREL64
:
8004 case elfcpp::R_PPC64_PLTGOT16
:
8005 case elfcpp::R_PPC64_PLTGOT16_LO
:
8006 case elfcpp::R_PPC64_PLTGOT16_HI
:
8007 case elfcpp::R_PPC64_PLTGOT16_HA
:
8008 case elfcpp::R_PPC64_PLT16_LO_DS
:
8009 case elfcpp::R_PPC64_PLTGOT16_DS
:
8010 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
8011 case elfcpp::R_PPC_EMB_RELSDA
:
8012 case elfcpp::R_PPC_TOC16
:
8015 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8016 _("unsupported reloc %u"),
8024 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8026 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
8027 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8028 && (insn
& 3) == 1))
8029 status
= Reloc::addr16_dq(view
, value
, overflow
);
8031 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8032 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8033 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
8034 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
8035 status
= Reloc::addr16_ds(view
, value
, overflow
);
8037 status
= Reloc::addr16(view
, value
, overflow
);
8040 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
8043 && gsym
->is_undefined()
8044 && is_branch_reloc(r_type
))))
8046 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8047 _("relocation overflow"));
8049 gold_info(_("try relinking with a smaller --stub-group-size"));
8055 // Relocate section data.
8057 template<int size
, bool big_endian
>
8059 Target_powerpc
<size
, big_endian
>::relocate_section(
8060 const Relocate_info
<size
, big_endian
>* relinfo
,
8061 unsigned int sh_type
,
8062 const unsigned char* prelocs
,
8064 Output_section
* output_section
,
8065 bool needs_special_offset_handling
,
8066 unsigned char* view
,
8068 section_size_type view_size
,
8069 const Reloc_symbol_changes
* reloc_symbol_changes
)
8071 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8072 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8073 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8074 Powerpc_comdat_behavior
;
8076 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8078 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
8079 Powerpc_relocate
, Powerpc_comdat_behavior
>(
8085 needs_special_offset_handling
,
8089 reloc_symbol_changes
);
8092 class Powerpc_scan_relocatable_reloc
8095 // Return the strategy to use for a local symbol which is not a
8096 // section symbol, given the relocation type.
8097 inline Relocatable_relocs::Reloc_strategy
8098 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8100 if (r_type
== 0 && r_sym
== 0)
8101 return Relocatable_relocs::RELOC_DISCARD
;
8102 return Relocatable_relocs::RELOC_COPY
;
8105 // Return the strategy to use for a local symbol which is a section
8106 // symbol, given the relocation type.
8107 inline Relocatable_relocs::Reloc_strategy
8108 local_section_strategy(unsigned int, Relobj
*)
8110 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8113 // Return the strategy to use for a global symbol, given the
8114 // relocation type, the object, and the symbol index.
8115 inline Relocatable_relocs::Reloc_strategy
8116 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8118 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8119 return Relocatable_relocs::RELOC_SPECIAL
;
8120 return Relocatable_relocs::RELOC_COPY
;
8124 // Scan the relocs during a relocatable link.
8126 template<int size
, bool big_endian
>
8128 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8129 Symbol_table
* symtab
,
8131 Sized_relobj_file
<size
, big_endian
>* object
,
8132 unsigned int data_shndx
,
8133 unsigned int sh_type
,
8134 const unsigned char* prelocs
,
8136 Output_section
* output_section
,
8137 bool needs_special_offset_handling
,
8138 size_t local_symbol_count
,
8139 const unsigned char* plocal_symbols
,
8140 Relocatable_relocs
* rr
)
8142 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8144 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
8145 Powerpc_scan_relocatable_reloc
>(
8153 needs_special_offset_handling
,
8159 // Emit relocations for a section.
8160 // This is a modified version of the function by the same name in
8161 // target-reloc.h. Using relocate_special_relocatable for
8162 // R_PPC_PLTREL24 would require duplication of the entire body of the
8163 // loop, so we may as well duplicate the whole thing.
8165 template<int size
, bool big_endian
>
8167 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8168 const Relocate_info
<size
, big_endian
>* relinfo
,
8169 unsigned int sh_type
,
8170 const unsigned char* prelocs
,
8172 Output_section
* output_section
,
8173 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8174 const Relocatable_relocs
* rr
,
8176 Address view_address
,
8178 unsigned char* reloc_view
,
8179 section_size_type reloc_view_size
)
8181 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8183 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8185 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
8187 const int reloc_size
8188 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8190 Powerpc_relobj
<size
, big_endian
>* const object
8191 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8192 const unsigned int local_count
= object
->local_symbol_count();
8193 unsigned int got2_shndx
= object
->got2_shndx();
8194 Address got2_addend
= 0;
8195 if (got2_shndx
!= 0)
8197 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8198 gold_assert(got2_addend
!= invalid_address
);
8201 unsigned char* pwrite
= reloc_view
;
8202 bool zap_next
= false;
8203 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8205 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
8206 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8209 Reltype
reloc(prelocs
);
8210 Reltype_write
reloc_write(pwrite
);
8212 Address offset
= reloc
.get_r_offset();
8213 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8214 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8215 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8216 const unsigned int orig_r_sym
= r_sym
;
8217 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8218 = reloc
.get_r_addend();
8219 const Symbol
* gsym
= NULL
;
8223 // We could arrange to discard these and other relocs for
8224 // tls optimised sequences in the strategy methods, but for
8225 // now do as BFD ld does.
8226 r_type
= elfcpp::R_POWERPC_NONE
;
8230 // Get the new symbol index.
8231 Output_section
* os
= NULL
;
8232 if (r_sym
< local_count
)
8236 case Relocatable_relocs::RELOC_COPY
:
8237 case Relocatable_relocs::RELOC_SPECIAL
:
8240 r_sym
= object
->symtab_index(r_sym
);
8241 gold_assert(r_sym
!= -1U);
8245 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
8247 // We are adjusting a section symbol. We need to find
8248 // the symbol table index of the section symbol for
8249 // the output section corresponding to input section
8250 // in which this symbol is defined.
8251 gold_assert(r_sym
< local_count
);
8253 unsigned int shndx
=
8254 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8255 gold_assert(is_ordinary
);
8256 os
= object
->output_section(shndx
);
8257 gold_assert(os
!= NULL
);
8258 gold_assert(os
->needs_symtab_index());
8259 r_sym
= os
->symtab_index();
8269 gsym
= object
->global_symbol(r_sym
);
8270 gold_assert(gsym
!= NULL
);
8271 if (gsym
->is_forwarder())
8272 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
8274 gold_assert(gsym
->has_symtab_index());
8275 r_sym
= gsym
->symtab_index();
8278 // Get the new offset--the location in the output section where
8279 // this relocation should be applied.
8280 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8281 offset
+= offset_in_output_section
;
8284 section_offset_type sot_offset
=
8285 convert_types
<section_offset_type
, Address
>(offset
);
8286 section_offset_type new_sot_offset
=
8287 output_section
->output_offset(object
, relinfo
->data_shndx
,
8289 gold_assert(new_sot_offset
!= -1);
8290 offset
= new_sot_offset
;
8293 // In an object file, r_offset is an offset within the section.
8294 // In an executable or dynamic object, generated by
8295 // --emit-relocs, r_offset is an absolute address.
8296 if (!parameters
->options().relocatable())
8298 offset
+= view_address
;
8299 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8300 offset
-= offset_in_output_section
;
8303 // Handle the reloc addend based on the strategy.
8304 if (strategy
== Relocatable_relocs::RELOC_COPY
)
8306 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
8308 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
8309 gold_assert(os
!= NULL
);
8310 addend
= psymval
->value(object
, addend
) - os
->address();
8312 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
8314 if (addend
>= 32768)
8315 addend
+= got2_addend
;
8320 if (!parameters
->options().relocatable())
8322 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8323 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8324 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8325 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8327 // First instruction of a global dynamic sequence,
8329 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8330 switch (this->optimize_tls_gd(final
))
8332 case tls::TLSOPT_TO_IE
:
8333 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8334 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8336 case tls::TLSOPT_TO_LE
:
8337 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8338 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8339 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8342 r_type
= elfcpp::R_POWERPC_NONE
;
8343 offset
-= 2 * big_endian
;
8350 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8351 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8352 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8353 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8355 // First instruction of a local dynamic sequence,
8357 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8359 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8360 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8362 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8363 const Output_section
* os
= relinfo
->layout
->tls_segment()
8365 gold_assert(os
!= NULL
);
8366 gold_assert(os
->needs_symtab_index());
8367 r_sym
= os
->symtab_index();
8368 addend
= dtp_offset
;
8372 r_type
= elfcpp::R_POWERPC_NONE
;
8373 offset
-= 2 * big_endian
;
8377 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8378 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8379 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8380 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8382 // First instruction of initial exec sequence.
8383 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8384 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8386 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8387 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8388 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8391 r_type
= elfcpp::R_POWERPC_NONE
;
8392 offset
-= 2 * big_endian
;
8396 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8397 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8399 // Second instruction of a global dynamic sequence,
8400 // the __tls_get_addr call
8401 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8402 switch (this->optimize_tls_gd(final
))
8404 case tls::TLSOPT_TO_IE
:
8405 r_type
= elfcpp::R_POWERPC_NONE
;
8408 case tls::TLSOPT_TO_LE
:
8409 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8410 offset
+= 2 * big_endian
;
8417 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8418 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8420 // Second instruction of a local dynamic sequence,
8421 // the __tls_get_addr call
8422 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8424 const Output_section
* os
= relinfo
->layout
->tls_segment()
8426 gold_assert(os
!= NULL
);
8427 gold_assert(os
->needs_symtab_index());
8428 r_sym
= os
->symtab_index();
8429 addend
= dtp_offset
;
8430 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8431 offset
+= 2 * big_endian
;
8435 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8437 // Second instruction of an initial exec sequence
8438 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8439 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8441 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8442 offset
+= 2 * big_endian
;
8447 reloc_write
.put_r_offset(offset
);
8448 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
8449 reloc_write
.put_r_addend(addend
);
8451 pwrite
+= reloc_size
;
8454 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
8455 == reloc_view_size
);
8458 // Return the value to use for a dynamic symbol which requires special
8459 // treatment. This is how we support equality comparisons of function
8460 // pointers across shared library boundaries, as described in the
8461 // processor specific ABI supplement.
8463 template<int size
, bool big_endian
>
8465 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8469 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
8470 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8471 p
!= this->stub_tables_
.end();
8474 Address off
= (*p
)->find_plt_call_entry(gsym
);
8475 if (off
!= invalid_address
)
8476 return (*p
)->stub_address() + off
;
8479 else if (this->abiversion() >= 2)
8481 Address off
= this->glink_section()->find_global_entry(gsym
);
8482 if (off
!= invalid_address
)
8483 return this->glink_section()->global_entry_address() + off
;
8488 // Return the PLT address to use for a local symbol.
8489 template<int size
, bool big_endian
>
8491 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8492 const Relobj
* object
,
8493 unsigned int symndx
) const
8497 const Sized_relobj
<size
, big_endian
>* relobj
8498 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8499 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8500 p
!= this->stub_tables_
.end();
8503 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8505 if (off
!= invalid_address
)
8506 return (*p
)->stub_address() + off
;
8512 // Return the PLT address to use for a global symbol.
8513 template<int size
, bool big_endian
>
8515 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8516 const Symbol
* gsym
) const
8520 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8521 p
!= this->stub_tables_
.end();
8524 Address off
= (*p
)->find_plt_call_entry(gsym
);
8525 if (off
!= invalid_address
)
8526 return (*p
)->stub_address() + off
;
8529 else if (this->abiversion() >= 2)
8531 Address off
= this->glink_section()->find_global_entry(gsym
);
8532 if (off
!= invalid_address
)
8533 return this->glink_section()->global_entry_address() + off
;
8538 // Return the offset to use for the GOT_INDX'th got entry which is
8539 // for a local tls symbol specified by OBJECT, SYMNDX.
8540 template<int size
, bool big_endian
>
8542 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8543 const Relobj
* object
,
8544 unsigned int symndx
,
8545 unsigned int got_indx
) const
8547 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8548 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8549 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8551 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8552 got_type
<= GOT_TYPE_TPREL
;
8553 got_type
= Got_type(got_type
+ 1))
8554 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8556 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8557 if (got_type
== GOT_TYPE_TLSGD
)
8559 if (off
== got_indx
* (size
/ 8))
8561 if (got_type
== GOT_TYPE_TPREL
)
8571 // Return the offset to use for the GOT_INDX'th got entry which is
8572 // for global tls symbol GSYM.
8573 template<int size
, bool big_endian
>
8575 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8577 unsigned int got_indx
) const
8579 if (gsym
->type() == elfcpp::STT_TLS
)
8581 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8582 got_type
<= GOT_TYPE_TPREL
;
8583 got_type
= Got_type(got_type
+ 1))
8584 if (gsym
->has_got_offset(got_type
))
8586 unsigned int off
= gsym
->got_offset(got_type
);
8587 if (got_type
== GOT_TYPE_TLSGD
)
8589 if (off
== got_indx
* (size
/ 8))
8591 if (got_type
== GOT_TYPE_TPREL
)
8601 // The selector for powerpc object files.
8603 template<int size
, bool big_endian
>
8604 class Target_selector_powerpc
: public Target_selector
8607 Target_selector_powerpc()
8608 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8611 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8612 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8614 ? (big_endian
? "elf64ppc" : "elf64lppc")
8615 : (big_endian
? "elf32ppc" : "elf32lppc")))
8619 do_instantiate_target()
8620 { return new Target_powerpc
<size
, big_endian
>(); }
8623 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8624 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8625 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8626 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8628 // Instantiate these constants for -O0
8629 template<int size
, bool big_endian
>
8630 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8631 template<int size
, bool big_endian
>
8632 const typename Output_data_glink
<size
, big_endian
>::Address
8633 Output_data_glink
<size
, big_endian
>::invalid_address
;
8634 template<int size
, bool big_endian
>
8635 const typename Stub_table
<size
, big_endian
>::Address
8636 Stub_table
<size
, big_endian
>::invalid_address
;
8637 template<int size
, bool big_endian
>
8638 const typename Target_powerpc
<size
, big_endian
>::Address
8639 Target_powerpc
<size
, big_endian
>::invalid_address
;
8641 } // End anonymous namespace.