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 const unsigned char* prelocs
, size_t reloc_count
,
635 unsigned char* view
, section_size_type view_size
,
636 std::string
* from
, std::string
* to
) const;
638 // Relocate a section.
640 relocate_section(const Relocate_info
<size
, big_endian
>*,
641 unsigned int sh_type
,
642 const unsigned char* prelocs
,
644 Output_section
* output_section
,
645 bool needs_special_offset_handling
,
647 Address view_address
,
648 section_size_type view_size
,
649 const Reloc_symbol_changes
*);
651 // Scan the relocs during a relocatable link.
653 scan_relocatable_relocs(Symbol_table
* symtab
,
655 Sized_relobj_file
<size
, big_endian
>* object
,
656 unsigned int data_shndx
,
657 unsigned int sh_type
,
658 const unsigned char* prelocs
,
660 Output_section
* output_section
,
661 bool needs_special_offset_handling
,
662 size_t local_symbol_count
,
663 const unsigned char* plocal_symbols
,
664 Relocatable_relocs
*);
666 // Emit relocations for a section.
668 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
669 unsigned int sh_type
,
670 const unsigned char* prelocs
,
672 Output_section
* output_section
,
673 typename
elfcpp::Elf_types
<size
>::Elf_Off
674 offset_in_output_section
,
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
>*, unsigned int,
1076 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1077 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1078 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1082 class Relocate_comdat_behavior
1085 // Decide what the linker should do for relocations that refer to
1086 // discarded comdat sections.
1087 inline Comdat_behavior
1088 get(const char* name
)
1090 gold::Default_comdat_behavior default_behavior
;
1091 Comdat_behavior ret
= default_behavior
.get(name
);
1092 if (ret
== CB_WARNING
)
1095 && (strcmp(name
, ".fixup") == 0
1096 || strcmp(name
, ".got2") == 0))
1099 && (strcmp(name
, ".opd") == 0
1100 || strcmp(name
, ".toc") == 0
1101 || strcmp(name
, ".toc1") == 0))
1108 // A class which returns the size required for a relocation type,
1109 // used while scanning relocs during a relocatable link.
1110 class Relocatable_size_for_reloc
1114 get_size_for_reloc(unsigned int, Relobj
*)
1121 // Optimize the TLS relocation type based on what we know about the
1122 // symbol. IS_FINAL is true if the final address of this symbol is
1123 // known at link time.
1125 tls::Tls_optimization
1126 optimize_tls_gd(bool is_final
)
1128 // If we are generating a shared library, then we can't do anything
1130 if (parameters
->options().shared())
1131 return tls::TLSOPT_NONE
;
1134 return tls::TLSOPT_TO_IE
;
1135 return tls::TLSOPT_TO_LE
;
1138 tls::Tls_optimization
1141 if (parameters
->options().shared())
1142 return tls::TLSOPT_NONE
;
1144 return tls::TLSOPT_TO_LE
;
1147 tls::Tls_optimization
1148 optimize_tls_ie(bool is_final
)
1150 if (!is_final
|| parameters
->options().shared())
1151 return tls::TLSOPT_NONE
;
1153 return tls::TLSOPT_TO_LE
;
1158 make_glink_section(Layout
*);
1160 // Create the PLT section.
1162 make_plt_section(Symbol_table
*, Layout
*);
1165 make_iplt_section(Symbol_table
*, Layout
*);
1168 make_brlt_section(Layout
*);
1170 // Create a PLT entry for a global symbol.
1172 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1174 // Create a PLT entry for a local IFUNC symbol.
1176 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1177 Sized_relobj_file
<size
, big_endian
>*,
1181 // Create a GOT entry for local dynamic __tls_get_addr.
1183 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1184 Sized_relobj_file
<size
, big_endian
>* object
);
1187 tlsld_got_offset() const
1189 return this->tlsld_got_offset_
;
1192 // Get the dynamic reloc section, creating it if necessary.
1194 rela_dyn_section(Layout
*);
1196 // Similarly, but for ifunc symbols get the one for ifunc.
1198 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1200 // Copy a relocation against a global symbol.
1202 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1203 Sized_relobj_file
<size
, big_endian
>* object
,
1204 unsigned int shndx
, Output_section
* output_section
,
1205 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1207 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1208 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1209 symtab
->get_sized_symbol
<size
>(sym
),
1210 object
, shndx
, output_section
,
1211 r_type
, reloc
.get_r_offset(),
1212 reloc
.get_r_addend(),
1213 this->rela_dyn_section(layout
));
1216 // Look over all the input sections, deciding where to place stubs.
1218 group_sections(Layout
*, const Task
*, bool);
1220 // Sort output sections by address.
1221 struct Sort_sections
1224 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1225 { return sec1
->address() < sec2
->address(); }
1231 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1232 unsigned int data_shndx
,
1234 unsigned int r_type
,
1237 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1238 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1244 // If this branch needs a plt call stub, or a long branch stub, make one.
1246 make_stub(Stub_table
<size
, big_endian
>*,
1247 Stub_table
<size
, big_endian
>*,
1248 Symbol_table
*) const;
1251 // The branch location..
1252 Powerpc_relobj
<size
, big_endian
>* object_
;
1253 unsigned int shndx_
;
1255 // ..and the branch type and destination.
1256 unsigned int r_type_
;
1257 unsigned int r_sym_
;
1261 // Information about this specific target which we pass to the
1262 // general Target structure.
1263 static Target::Target_info powerpc_info
;
1265 // The types of GOT entries needed for this platform.
1266 // These values are exposed to the ABI in an incremental link.
1267 // Do not renumber existing values without changing the version
1268 // number of the .gnu_incremental_inputs section.
1272 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1273 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1274 GOT_TYPE_TPREL
// entry for @got@tprel
1278 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1279 // The PLT section. This is a container for a table of addresses,
1280 // and their relocations. Each address in the PLT has a dynamic
1281 // relocation (R_*_JMP_SLOT) and each address will have a
1282 // corresponding entry in .glink for lazy resolution of the PLT.
1283 // ppc32 initialises the PLT to point at the .glink entry, while
1284 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1285 // linker adds a stub that loads the PLT entry into ctr then
1286 // branches to ctr. There may be more than one stub for each PLT
1287 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1288 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1289 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1290 // The IPLT section. Like plt_, this is a container for a table of
1291 // addresses and their relocations, specifically for STT_GNU_IFUNC
1292 // functions that resolve locally (STT_GNU_IFUNC functions that
1293 // don't resolve locally go in PLT). Unlike plt_, these have no
1294 // entry in .glink for lazy resolution, and the relocation section
1295 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1296 // the relocation section may contain relocations against
1297 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1298 // relocation section will appear at the end of other dynamic
1299 // relocations, so that ld.so applies these relocations after other
1300 // dynamic relocations. In a static executable, the relocation
1301 // section is emitted and marked with __rela_iplt_start and
1302 // __rela_iplt_end symbols.
1303 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1304 // Section holding long branch destinations.
1305 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1306 // The .glink section.
1307 Output_data_glink
<size
, big_endian
>* glink_
;
1308 // The dynamic reloc section.
1309 Reloc_section
* rela_dyn_
;
1310 // Relocs saved to avoid a COPY reloc.
1311 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1312 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1313 unsigned int tlsld_got_offset_
;
1315 Stub_tables stub_tables_
;
1316 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1317 Branch_lookup_table branch_lookup_table_
;
1319 typedef std::vector
<Branch_info
> Branches
;
1320 Branches branch_info_
;
1322 bool plt_thread_safe_
;
1325 int relax_fail_count_
;
1326 int32_t stub_group_size_
;
1328 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1332 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1335 true, // is_big_endian
1336 elfcpp::EM_PPC
, // machine_code
1337 false, // has_make_symbol
1338 false, // has_resolve
1339 false, // has_code_fill
1340 true, // is_default_stack_executable
1341 false, // can_icf_inline_merge_sections
1343 "/usr/lib/ld.so.1", // dynamic_linker
1344 0x10000000, // default_text_segment_address
1345 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1346 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1347 false, // isolate_execinstr
1349 elfcpp::SHN_UNDEF
, // small_common_shndx
1350 elfcpp::SHN_UNDEF
, // large_common_shndx
1351 0, // small_common_section_flags
1352 0, // large_common_section_flags
1353 NULL
, // attributes_section
1354 NULL
, // attributes_vendor
1355 "_start", // entry_symbol_name
1356 32, // hash_entry_size
1360 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1363 false, // is_big_endian
1364 elfcpp::EM_PPC
, // machine_code
1365 false, // has_make_symbol
1366 false, // has_resolve
1367 false, // has_code_fill
1368 true, // is_default_stack_executable
1369 false, // can_icf_inline_merge_sections
1371 "/usr/lib/ld.so.1", // dynamic_linker
1372 0x10000000, // default_text_segment_address
1373 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1374 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1375 false, // isolate_execinstr
1377 elfcpp::SHN_UNDEF
, // small_common_shndx
1378 elfcpp::SHN_UNDEF
, // large_common_shndx
1379 0, // small_common_section_flags
1380 0, // large_common_section_flags
1381 NULL
, // attributes_section
1382 NULL
, // attributes_vendor
1383 "_start", // entry_symbol_name
1384 32, // hash_entry_size
1388 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1391 true, // is_big_endian
1392 elfcpp::EM_PPC64
, // machine_code
1393 false, // has_make_symbol
1394 false, // has_resolve
1395 false, // has_code_fill
1396 true, // is_default_stack_executable
1397 false, // can_icf_inline_merge_sections
1399 "/usr/lib/ld.so.1", // dynamic_linker
1400 0x10000000, // default_text_segment_address
1401 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1402 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1403 false, // isolate_execinstr
1405 elfcpp::SHN_UNDEF
, // small_common_shndx
1406 elfcpp::SHN_UNDEF
, // large_common_shndx
1407 0, // small_common_section_flags
1408 0, // large_common_section_flags
1409 NULL
, // attributes_section
1410 NULL
, // attributes_vendor
1411 "_start", // entry_symbol_name
1412 32, // hash_entry_size
1416 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1419 false, // is_big_endian
1420 elfcpp::EM_PPC64
, // machine_code
1421 false, // has_make_symbol
1422 false, // has_resolve
1423 false, // has_code_fill
1424 true, // is_default_stack_executable
1425 false, // can_icf_inline_merge_sections
1427 "/usr/lib/ld.so.1", // dynamic_linker
1428 0x10000000, // default_text_segment_address
1429 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1430 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1431 false, // isolate_execinstr
1433 elfcpp::SHN_UNDEF
, // small_common_shndx
1434 elfcpp::SHN_UNDEF
, // large_common_shndx
1435 0, // small_common_section_flags
1436 0, // large_common_section_flags
1437 NULL
, // attributes_section
1438 NULL
, // attributes_vendor
1439 "_start", // entry_symbol_name
1440 32, // hash_entry_size
1444 is_branch_reloc(unsigned int r_type
)
1446 return (r_type
== elfcpp::R_POWERPC_REL24
1447 || r_type
== elfcpp::R_PPC_PLTREL24
1448 || r_type
== elfcpp::R_PPC_LOCAL24PC
1449 || r_type
== elfcpp::R_POWERPC_REL14
1450 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1451 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1452 || r_type
== elfcpp::R_POWERPC_ADDR24
1453 || r_type
== elfcpp::R_POWERPC_ADDR14
1454 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1455 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1458 // If INSN is an opcode that may be used with an @tls operand, return
1459 // the transformed insn for TLS optimisation, otherwise return 0. If
1460 // REG is non-zero only match an insn with RB or RA equal to REG.
1462 at_tls_transform(uint32_t insn
, unsigned int reg
)
1464 if ((insn
& (0x3f << 26)) != 31 << 26)
1468 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1469 rtra
= insn
& ((1 << 26) - (1 << 16));
1470 else if (((insn
>> 16) & 0x1f) == reg
)
1471 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1475 if ((insn
& (0x3ff << 1)) == 266 << 1)
1478 else if ((insn
& (0x1f << 1)) == 23 << 1
1479 && ((insn
& (0x1f << 6)) < 14 << 6
1480 || ((insn
& (0x1f << 6)) >= 16 << 6
1481 && (insn
& (0x1f << 6)) < 24 << 6)))
1482 // load and store indexed -> dform
1483 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1484 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1485 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1486 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1487 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1489 insn
= (58 << 26) | 2;
1497 template<int size
, bool big_endian
>
1498 class Powerpc_relocate_functions
1518 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1519 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1520 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1522 template<int valsize
>
1524 has_overflow_signed(Address value
)
1526 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1527 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1528 limit
<<= ((valsize
- 1) >> 1);
1529 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1530 return value
+ limit
> (limit
<< 1) - 1;
1533 template<int valsize
>
1535 has_overflow_unsigned(Address value
)
1537 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1538 limit
<<= ((valsize
- 1) >> 1);
1539 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1540 return value
> (limit
<< 1) - 1;
1543 template<int valsize
>
1545 has_overflow_bitfield(Address value
)
1547 return (has_overflow_unsigned
<valsize
>(value
)
1548 && has_overflow_signed
<valsize
>(value
));
1551 template<int valsize
>
1552 static inline Status
1553 overflowed(Address value
, Overflow_check overflow
)
1555 if (overflow
== CHECK_SIGNED
)
1557 if (has_overflow_signed
<valsize
>(value
))
1558 return STATUS_OVERFLOW
;
1560 else if (overflow
== CHECK_UNSIGNED
)
1562 if (has_overflow_unsigned
<valsize
>(value
))
1563 return STATUS_OVERFLOW
;
1565 else if (overflow
== CHECK_BITFIELD
)
1567 if (has_overflow_bitfield
<valsize
>(value
))
1568 return STATUS_OVERFLOW
;
1573 // Do a simple RELA relocation
1574 template<int fieldsize
, int valsize
>
1575 static inline Status
1576 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1578 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1579 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1580 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1581 return overflowed
<valsize
>(value
, overflow
);
1584 template<int fieldsize
, int valsize
>
1585 static inline Status
1586 rela(unsigned char* view
,
1587 unsigned int right_shift
,
1588 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1590 Overflow_check overflow
)
1592 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1593 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1594 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1595 Valtype reloc
= value
>> right_shift
;
1598 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1599 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1602 // Do a simple RELA relocation, unaligned.
1603 template<int fieldsize
, int valsize
>
1604 static inline Status
1605 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1607 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1608 return overflowed
<valsize
>(value
, overflow
);
1611 template<int fieldsize
, int valsize
>
1612 static inline Status
1613 rela_ua(unsigned char* view
,
1614 unsigned int right_shift
,
1615 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1617 Overflow_check overflow
)
1619 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1621 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1622 Valtype reloc
= value
>> right_shift
;
1625 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1626 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1630 // R_PPC64_ADDR64: (Symbol + Addend)
1632 addr64(unsigned char* view
, Address value
)
1633 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1635 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1637 addr64_u(unsigned char* view
, Address value
)
1638 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1640 // R_POWERPC_ADDR32: (Symbol + Addend)
1641 static inline Status
1642 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1643 { return This::template rela
<32,32>(view
, value
, overflow
); }
1645 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1646 static inline Status
1647 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1648 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1650 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1651 static inline Status
1652 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1654 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1656 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1657 stat
= STATUS_OVERFLOW
;
1661 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1662 static inline Status
1663 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1664 { return This::template rela
<16,16>(view
, value
, overflow
); }
1666 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1667 static inline Status
1668 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1669 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1671 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1672 static inline Status
1673 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1675 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1676 if ((value
& 3) != 0)
1677 stat
= STATUS_OVERFLOW
;
1681 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1682 static inline Status
1683 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1685 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1686 if ((value
& 15) != 0)
1687 stat
= STATUS_OVERFLOW
;
1691 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1693 addr16_hi(unsigned char* view
, Address value
)
1694 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1696 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1698 addr16_ha(unsigned char* view
, Address value
)
1699 { This::addr16_hi(view
, value
+ 0x8000); }
1701 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1703 addr16_hi2(unsigned char* view
, Address value
)
1704 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1706 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1708 addr16_ha2(unsigned char* view
, Address value
)
1709 { This::addr16_hi2(view
, value
+ 0x8000); }
1711 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1713 addr16_hi3(unsigned char* view
, Address value
)
1714 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1716 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1718 addr16_ha3(unsigned char* view
, Address value
)
1719 { This::addr16_hi3(view
, value
+ 0x8000); }
1721 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1722 static inline Status
1723 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1725 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1726 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1727 stat
= STATUS_OVERFLOW
;
1731 // R_POWERPC_REL16DX_HA
1732 static inline Status
1733 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
1735 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
1736 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1737 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
1739 value
= static_cast<SignedAddress
>(value
) >> 16;
1740 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
1741 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
1742 return overflowed
<16>(value
, overflow
);
1746 // Set ABI version for input and output.
1748 template<int size
, bool big_endian
>
1750 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1752 this->e_flags_
|= ver
;
1753 if (this->abiversion() != 0)
1755 Target_powerpc
<size
, big_endian
>* target
=
1756 static_cast<Target_powerpc
<size
, big_endian
>*>(
1757 parameters
->sized_target
<size
, big_endian
>());
1758 if (target
->abiversion() == 0)
1759 target
->set_abiversion(this->abiversion());
1760 else if (target
->abiversion() != this->abiversion())
1761 gold_error(_("%s: ABI version %d is not compatible "
1762 "with ABI version %d output"),
1763 this->name().c_str(),
1764 this->abiversion(), target
->abiversion());
1769 // Stash away the index of .got2 or .opd in a relocatable object, if
1770 // such a section exists.
1772 template<int size
, bool big_endian
>
1774 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1775 Read_symbols_data
* sd
)
1777 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1778 const unsigned char* namesu
= sd
->section_names
->data();
1779 const char* names
= reinterpret_cast<const char*>(namesu
);
1780 section_size_type names_size
= sd
->section_names_size
;
1781 const unsigned char* s
;
1783 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1784 size
== 32 ? ".got2" : ".opd",
1785 names
, names_size
, NULL
);
1788 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1789 this->special_
= ndx
;
1792 if (this->abiversion() == 0)
1793 this->set_abiversion(1);
1794 else if (this->abiversion() > 1)
1795 gold_error(_("%s: .opd invalid in abiv%d"),
1796 this->name().c_str(), this->abiversion());
1799 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1802 // Examine .rela.opd to build info about function entry points.
1804 template<int size
, bool big_endian
>
1806 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1808 const unsigned char* prelocs
,
1809 const unsigned char* plocal_syms
)
1813 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1815 const int reloc_size
1816 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1817 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1818 Address expected_off
= 0;
1819 bool regular
= true;
1820 unsigned int opd_ent_size
= 0;
1822 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1824 Reltype
reloc(prelocs
);
1825 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1826 = reloc
.get_r_info();
1827 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1828 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1830 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1831 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1834 if (r_sym
< this->local_symbol_count())
1836 typename
elfcpp::Sym
<size
, big_endian
>
1837 lsym(plocal_syms
+ r_sym
* sym_size
);
1838 shndx
= lsym
.get_st_shndx();
1839 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1840 value
= lsym
.get_st_value();
1843 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1845 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1846 value
+ reloc
.get_r_addend());
1849 expected_off
= reloc
.get_r_offset();
1850 opd_ent_size
= expected_off
;
1852 else if (expected_off
!= reloc
.get_r_offset())
1854 expected_off
+= opd_ent_size
;
1856 else if (r_type
== elfcpp::R_PPC64_TOC
)
1858 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1863 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1864 this->name().c_str(), r_type
);
1868 if (reloc_count
<= 2)
1869 opd_ent_size
= this->section_size(this->opd_shndx());
1870 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1874 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1875 this->name().c_str());
1881 template<int size
, bool big_endian
>
1883 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1885 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1888 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1889 p
!= rd
->relocs
.end();
1892 if (p
->data_shndx
== this->opd_shndx())
1894 uint64_t opd_size
= this->section_size(this->opd_shndx());
1895 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1898 this->init_opd(opd_size
);
1899 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1900 rd
->local_symbols
->data());
1908 // Read the symbols then set up st_other vector.
1910 template<int size
, bool big_endian
>
1912 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1914 this->base_read_symbols(sd
);
1917 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1918 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1919 const unsigned int loccount
= this->do_local_symbol_count();
1922 this->st_other_
.resize(loccount
);
1923 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1924 off_t locsize
= loccount
* sym_size
;
1925 const unsigned int symtab_shndx
= this->symtab_shndx();
1926 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1927 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1928 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1929 locsize
, true, false);
1931 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1933 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1934 unsigned char st_other
= sym
.get_st_other();
1935 this->st_other_
[i
] = st_other
;
1936 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1938 if (this->abiversion() == 0)
1939 this->set_abiversion(2);
1940 else if (this->abiversion() < 2)
1941 gold_error(_("%s: local symbol %d has invalid st_other"
1942 " for ABI version 1"),
1943 this->name().c_str(), i
);
1950 template<int size
, bool big_endian
>
1952 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1954 this->e_flags_
|= ver
;
1955 if (this->abiversion() != 0)
1957 Target_powerpc
<size
, big_endian
>* target
=
1958 static_cast<Target_powerpc
<size
, big_endian
>*>(
1959 parameters
->sized_target
<size
, big_endian
>());
1960 if (target
->abiversion() == 0)
1961 target
->set_abiversion(this->abiversion());
1962 else if (target
->abiversion() != this->abiversion())
1963 gold_error(_("%s: ABI version %d is not compatible "
1964 "with ABI version %d output"),
1965 this->name().c_str(),
1966 this->abiversion(), target
->abiversion());
1971 // Call Sized_dynobj::base_read_symbols to read the symbols then
1972 // read .opd from a dynamic object, filling in opd_ent_ vector,
1974 template<int size
, bool big_endian
>
1976 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1978 this->base_read_symbols(sd
);
1981 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1982 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1983 const unsigned char* namesu
= sd
->section_names
->data();
1984 const char* names
= reinterpret_cast<const char*>(namesu
);
1985 const unsigned char* s
= NULL
;
1986 const unsigned char* opd
;
1987 section_size_type opd_size
;
1989 // Find and read .opd section.
1992 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1993 sd
->section_names_size
,
1998 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1999 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2000 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2002 if (this->abiversion() == 0)
2003 this->set_abiversion(1);
2004 else if (this->abiversion() > 1)
2005 gold_error(_("%s: .opd invalid in abiv%d"),
2006 this->name().c_str(), this->abiversion());
2008 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2009 this->opd_address_
= shdr
.get_sh_addr();
2010 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2011 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2017 // Build set of executable sections.
2018 // Using a set is probably overkill. There is likely to be only
2019 // a few executable sections, typically .init, .text and .fini,
2020 // and they are generally grouped together.
2021 typedef std::set
<Sec_info
> Exec_sections
;
2022 Exec_sections exec_sections
;
2024 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2026 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2027 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2028 && ((shdr
.get_sh_flags()
2029 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2030 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2031 && shdr
.get_sh_size() != 0)
2033 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2034 shdr
.get_sh_size(), i
));
2037 if (exec_sections
.empty())
2040 // Look over the OPD entries. This is complicated by the fact
2041 // that some binaries will use two-word entries while others
2042 // will use the standard three-word entries. In most cases
2043 // the third word (the environment pointer for languages like
2044 // Pascal) is unused and will be zero. If the third word is
2045 // used it should not be pointing into executable sections,
2047 this->init_opd(opd_size
);
2048 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2050 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2051 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2052 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2054 // Chances are that this is the third word of an OPD entry.
2056 typename
Exec_sections::const_iterator e
2057 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2058 if (e
!= exec_sections
.begin())
2061 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2063 // We have an address in an executable section.
2064 // VAL ought to be the function entry, set it up.
2065 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2066 // Skip second word of OPD entry, the TOC pointer.
2070 // If we didn't match any executable sections, we likely
2071 // have a non-zero third word in the OPD entry.
2076 // Set up some symbols.
2078 template<int size
, bool big_endian
>
2080 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2081 Symbol_table
* symtab
,
2086 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2087 // undefined when scanning relocs (and thus requires
2088 // non-relative dynamic relocs). The proper value will be
2090 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2091 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2093 Target_powerpc
<size
, big_endian
>* target
=
2094 static_cast<Target_powerpc
<size
, big_endian
>*>(
2095 parameters
->sized_target
<size
, big_endian
>());
2096 Output_data_got_powerpc
<size
, big_endian
>* got
2097 = target
->got_section(symtab
, layout
);
2098 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2099 Symbol_table::PREDEFINED
,
2103 elfcpp::STV_HIDDEN
, 0,
2107 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2108 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2109 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2111 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2113 = layout
->add_output_section_data(".sdata", 0,
2115 | elfcpp::SHF_WRITE
,
2116 sdata
, ORDER_SMALL_DATA
, false);
2117 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2118 Symbol_table::PREDEFINED
,
2119 os
, 32768, 0, elfcpp::STT_OBJECT
,
2120 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2126 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2127 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2128 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2130 Target_powerpc
<size
, big_endian
>* target
=
2131 static_cast<Target_powerpc
<size
, big_endian
>*>(
2132 parameters
->sized_target
<size
, big_endian
>());
2133 Output_data_got_powerpc
<size
, big_endian
>* got
2134 = target
->got_section(symtab
, layout
);
2135 symtab
->define_in_output_data(".TOC.", NULL
,
2136 Symbol_table::PREDEFINED
,
2140 elfcpp::STV_HIDDEN
, 0,
2146 // Set up PowerPC target specific relobj.
2148 template<int size
, bool big_endian
>
2150 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2151 const std::string
& name
,
2152 Input_file
* input_file
,
2153 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2155 int et
= ehdr
.get_e_type();
2156 // ET_EXEC files are valid input for --just-symbols/-R,
2157 // and we treat them as relocatable objects.
2158 if (et
== elfcpp::ET_REL
2159 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2161 Powerpc_relobj
<size
, big_endian
>* obj
=
2162 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2166 else if (et
== elfcpp::ET_DYN
)
2168 Powerpc_dynobj
<size
, big_endian
>* obj
=
2169 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2175 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2180 template<int size
, bool big_endian
>
2181 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2184 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2185 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2187 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2188 : Output_data_got
<size
, big_endian
>(),
2189 symtab_(symtab
), layout_(layout
),
2190 header_ent_cnt_(size
== 32 ? 3 : 1),
2191 header_index_(size
== 32 ? 0x2000 : 0)
2194 this->set_addralign(256);
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_2_2_12
= 0x7c426214;
3225 static const uint32_t add_3_3_2
= 0x7c631214;
3226 static const uint32_t add_3_3_13
= 0x7c636a14;
3227 static const uint32_t add_11_0_11
= 0x7d605a14;
3228 static const uint32_t add_11_2_11
= 0x7d625a14;
3229 static const uint32_t add_11_11_2
= 0x7d6b1214;
3230 static const uint32_t addi_0_12
= 0x380c0000;
3231 static const uint32_t addi_2_2
= 0x38420000;
3232 static const uint32_t addi_3_3
= 0x38630000;
3233 static const uint32_t addi_11_11
= 0x396b0000;
3234 static const uint32_t addi_12_1
= 0x39810000;
3235 static const uint32_t addi_12_12
= 0x398c0000;
3236 static const uint32_t addis_0_2
= 0x3c020000;
3237 static const uint32_t addis_0_13
= 0x3c0d0000;
3238 static const uint32_t addis_2_12
= 0x3c4c0000;
3239 static const uint32_t addis_11_2
= 0x3d620000;
3240 static const uint32_t addis_11_11
= 0x3d6b0000;
3241 static const uint32_t addis_11_30
= 0x3d7e0000;
3242 static const uint32_t addis_12_1
= 0x3d810000;
3243 static const uint32_t addis_12_2
= 0x3d820000;
3244 static const uint32_t addis_12_12
= 0x3d8c0000;
3245 static const uint32_t b
= 0x48000000;
3246 static const uint32_t bcl_20_31
= 0x429f0005;
3247 static const uint32_t bctr
= 0x4e800420;
3248 static const uint32_t blr
= 0x4e800020;
3249 static const uint32_t bnectr_p4
= 0x4ce20420;
3250 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3251 static const uint32_t cmpldi_2_0
= 0x28220000;
3252 static const uint32_t cror_15_15_15
= 0x4def7b82;
3253 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3254 static const uint32_t ld_0_1
= 0xe8010000;
3255 static const uint32_t ld_0_12
= 0xe80c0000;
3256 static const uint32_t ld_2_1
= 0xe8410000;
3257 static const uint32_t ld_2_2
= 0xe8420000;
3258 static const uint32_t ld_2_11
= 0xe84b0000;
3259 static const uint32_t ld_2_12
= 0xe84c0000;
3260 static const uint32_t ld_11_2
= 0xe9620000;
3261 static const uint32_t ld_11_11
= 0xe96b0000;
3262 static const uint32_t ld_12_2
= 0xe9820000;
3263 static const uint32_t ld_12_11
= 0xe98b0000;
3264 static const uint32_t ld_12_12
= 0xe98c0000;
3265 static const uint32_t lfd_0_1
= 0xc8010000;
3266 static const uint32_t li_0_0
= 0x38000000;
3267 static const uint32_t li_12_0
= 0x39800000;
3268 static const uint32_t lis_0
= 0x3c000000;
3269 static const uint32_t lis_2
= 0x3c400000;
3270 static const uint32_t lis_11
= 0x3d600000;
3271 static const uint32_t lis_12
= 0x3d800000;
3272 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3273 static const uint32_t lwz_0_12
= 0x800c0000;
3274 static const uint32_t lwz_11_11
= 0x816b0000;
3275 static const uint32_t lwz_11_30
= 0x817e0000;
3276 static const uint32_t lwz_12_12
= 0x818c0000;
3277 static const uint32_t lwzu_0_12
= 0x840c0000;
3278 static const uint32_t mflr_0
= 0x7c0802a6;
3279 static const uint32_t mflr_11
= 0x7d6802a6;
3280 static const uint32_t mflr_12
= 0x7d8802a6;
3281 static const uint32_t mtctr_0
= 0x7c0903a6;
3282 static const uint32_t mtctr_11
= 0x7d6903a6;
3283 static const uint32_t mtctr_12
= 0x7d8903a6;
3284 static const uint32_t mtlr_0
= 0x7c0803a6;
3285 static const uint32_t mtlr_12
= 0x7d8803a6;
3286 static const uint32_t nop
= 0x60000000;
3287 static const uint32_t ori_0_0_0
= 0x60000000;
3288 static const uint32_t srdi_0_0_2
= 0x7800f082;
3289 static const uint32_t std_0_1
= 0xf8010000;
3290 static const uint32_t std_0_12
= 0xf80c0000;
3291 static const uint32_t std_2_1
= 0xf8410000;
3292 static const uint32_t stfd_0_1
= 0xd8010000;
3293 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3294 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3295 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3296 static const uint32_t xor_2_12_12
= 0x7d826278;
3297 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3299 // Write out the PLT.
3301 template<int size
, bool big_endian
>
3303 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3305 if (size
== 32 && this->name_
[3] != 'I')
3307 const section_size_type offset
= this->offset();
3308 const section_size_type oview_size
3309 = convert_to_section_size_type(this->data_size());
3310 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3311 unsigned char* pov
= oview
;
3312 unsigned char* endpov
= oview
+ oview_size
;
3314 // The address of the .glink branch table
3315 const Output_data_glink
<size
, big_endian
>* glink
3316 = this->targ_
->glink_section();
3317 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3319 while (pov
< endpov
)
3321 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3326 of
->write_output_view(offset
, oview_size
, oview
);
3330 // Create the PLT section.
3332 template<int size
, bool big_endian
>
3334 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3337 if (this->plt_
== NULL
)
3339 if (this->got_
== NULL
)
3340 this->got_section(symtab
, layout
);
3342 if (this->glink_
== NULL
)
3343 make_glink_section(layout
);
3345 // Ensure that .rela.dyn always appears before .rela.plt This is
3346 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3347 // needs to include .rela.plt in its range.
3348 this->rela_dyn_section(layout
);
3350 Reloc_section
* plt_rel
= new Reloc_section(false);
3351 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3352 elfcpp::SHF_ALLOC
, plt_rel
,
3353 ORDER_DYNAMIC_PLT_RELOCS
, false);
3355 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3357 layout
->add_output_section_data(".plt",
3359 ? elfcpp::SHT_PROGBITS
3360 : elfcpp::SHT_NOBITS
),
3361 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3370 // Create the IPLT section.
3372 template<int size
, bool big_endian
>
3374 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3377 if (this->iplt_
== NULL
)
3379 this->make_plt_section(symtab
, layout
);
3381 Reloc_section
* iplt_rel
= new Reloc_section(false);
3382 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3384 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3386 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3390 // A section for huge long branch addresses, similar to plt section.
3392 template<int size
, bool big_endian
>
3393 class Output_data_brlt_powerpc
: public Output_section_data_build
3396 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3397 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3398 size
, big_endian
> Reloc_section
;
3400 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3401 Reloc_section
* brlt_rel
)
3402 : Output_section_data_build(size
== 32 ? 4 : 8),
3410 this->reset_data_size();
3411 this->rel_
->reset_data_size();
3415 finalize_brlt_sizes()
3417 this->finalize_data_size();
3418 this->rel_
->finalize_data_size();
3421 // Add a reloc for an entry in the BRLT.
3423 add_reloc(Address to
, unsigned int off
)
3424 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3426 // Update section and reloc section size.
3428 set_current_size(unsigned int num_branches
)
3430 this->reset_address_and_file_offset();
3431 this->set_current_data_size(num_branches
* 16);
3432 this->finalize_data_size();
3433 Output_section
* os
= this->output_section();
3434 os
->set_section_offsets_need_adjustment();
3435 if (this->rel_
!= NULL
)
3437 unsigned int reloc_size
3438 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3439 this->rel_
->reset_address_and_file_offset();
3440 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3441 this->rel_
->finalize_data_size();
3442 Output_section
* os
= this->rel_
->output_section();
3443 os
->set_section_offsets_need_adjustment();
3449 do_adjust_output_section(Output_section
* os
)
3454 // Write to a map file.
3456 do_print_to_mapfile(Mapfile
* mapfile
) const
3457 { mapfile
->print_output_data(this, "** BRLT"); }
3460 // Write out the BRLT data.
3462 do_write(Output_file
*);
3464 // The reloc section.
3465 Reloc_section
* rel_
;
3466 Target_powerpc
<size
, big_endian
>* targ_
;
3469 // Make the branch lookup table section.
3471 template<int size
, bool big_endian
>
3473 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3475 if (size
== 64 && this->brlt_section_
== NULL
)
3477 Reloc_section
* brlt_rel
= NULL
;
3478 bool is_pic
= parameters
->options().output_is_position_independent();
3481 // When PIC we can't fill in .branch_lt (like .plt it can be
3482 // a bss style section) but must initialise at runtime via
3483 // dynamic relocats.
3484 this->rela_dyn_section(layout
);
3485 brlt_rel
= new Reloc_section(false);
3486 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3489 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3490 if (this->plt_
&& is_pic
)
3491 this->plt_
->output_section()
3492 ->add_output_section_data(this->brlt_section_
);
3494 layout
->add_output_section_data(".branch_lt",
3495 (is_pic
? elfcpp::SHT_NOBITS
3496 : elfcpp::SHT_PROGBITS
),
3497 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3498 this->brlt_section_
,
3499 (is_pic
? ORDER_SMALL_BSS
3500 : ORDER_SMALL_DATA
),
3505 // Write out .branch_lt when non-PIC.
3507 template<int size
, bool big_endian
>
3509 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3511 if (size
== 64 && !parameters
->options().output_is_position_independent())
3513 const section_size_type offset
= this->offset();
3514 const section_size_type oview_size
3515 = convert_to_section_size_type(this->data_size());
3516 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3518 this->targ_
->write_branch_lookup_table(oview
);
3519 of
->write_output_view(offset
, oview_size
, oview
);
3523 static inline uint32_t
3529 static inline uint32_t
3535 static inline uint32_t
3538 return hi(a
+ 0x8000);
3544 static const unsigned char eh_frame_cie
[12];
3548 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3551 'z', 'R', 0, // Augmentation string.
3552 4, // Code alignment.
3553 0x80 - size
/ 8 , // Data alignment.
3555 1, // Augmentation size.
3556 (elfcpp::DW_EH_PE_pcrel
3557 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3558 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3561 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3562 static const unsigned char glink_eh_frame_fde_64v1
[] =
3564 0, 0, 0, 0, // Replaced with offset to .glink.
3565 0, 0, 0, 0, // Replaced with size of .glink.
3566 0, // Augmentation size.
3567 elfcpp::DW_CFA_advance_loc
+ 1,
3568 elfcpp::DW_CFA_register
, 65, 12,
3569 elfcpp::DW_CFA_advance_loc
+ 4,
3570 elfcpp::DW_CFA_restore_extended
, 65
3573 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3574 static const unsigned char glink_eh_frame_fde_64v2
[] =
3576 0, 0, 0, 0, // Replaced with offset to .glink.
3577 0, 0, 0, 0, // Replaced with size of .glink.
3578 0, // Augmentation size.
3579 elfcpp::DW_CFA_advance_loc
+ 1,
3580 elfcpp::DW_CFA_register
, 65, 0,
3581 elfcpp::DW_CFA_advance_loc
+ 4,
3582 elfcpp::DW_CFA_restore_extended
, 65
3585 // Describe __glink_PLTresolve use of LR, 32-bit version.
3586 static const unsigned char glink_eh_frame_fde_32
[] =
3588 0, 0, 0, 0, // Replaced with offset to .glink.
3589 0, 0, 0, 0, // Replaced with size of .glink.
3590 0, // Augmentation size.
3591 elfcpp::DW_CFA_advance_loc
+ 2,
3592 elfcpp::DW_CFA_register
, 65, 0,
3593 elfcpp::DW_CFA_advance_loc
+ 4,
3594 elfcpp::DW_CFA_restore_extended
, 65
3597 static const unsigned char default_fde
[] =
3599 0, 0, 0, 0, // Replaced with offset to stubs.
3600 0, 0, 0, 0, // Replaced with size of stubs.
3601 0, // Augmentation size.
3602 elfcpp::DW_CFA_nop
, // Pad.
3607 template<bool big_endian
>
3609 write_insn(unsigned char* p
, uint32_t v
)
3611 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3614 // Stub_table holds information about plt and long branch stubs.
3615 // Stubs are built in an area following some input section determined
3616 // by group_sections(). This input section is converted to a relaxed
3617 // input section allowing it to be resized to accommodate the stubs
3619 template<int size
, bool big_endian
>
3620 class Stub_table
: public Output_relaxed_input_section
3623 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3624 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3626 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3627 Output_section
* output_section
,
3628 const Output_section::Input_section
* owner
)
3629 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3631 ->section_addralign(owner
->shndx())),
3632 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3633 orig_data_size_(owner
->current_data_size()),
3634 plt_size_(0), last_plt_size_(0),
3635 branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
3636 need_save_res_(false)
3638 this->set_output_section(output_section
);
3640 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3641 new_relaxed
.push_back(this);
3642 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3645 // Add a plt call stub.
3647 add_plt_call_entry(Address
,
3648 const Sized_relobj_file
<size
, big_endian
>*,
3654 add_plt_call_entry(Address
,
3655 const Sized_relobj_file
<size
, big_endian
>*,
3660 // Find a given plt call stub.
3662 find_plt_call_entry(const Symbol
*) const;
3665 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3666 unsigned int) const;
3669 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3675 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3680 // Add a long branch stub.
3682 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3683 unsigned int, Address
, Address
, bool);
3686 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3690 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3692 Address max_branch_offset
= max_branch_delta(r_type
);
3693 if (max_branch_offset
== 0)
3695 gold_assert(from
!= invalid_address
);
3696 Address loc
= off
+ this->stub_address();
3697 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3701 clear_stubs(bool all
)
3703 this->plt_call_stubs_
.clear();
3704 this->plt_size_
= 0;
3705 this->long_branch_stubs_
.clear();
3706 this->branch_size_
= 0;
3707 this->need_save_res_
= false;
3710 this->last_plt_size_
= 0;
3711 this->last_branch_size_
= 0;
3716 set_address_and_size(const Output_section
* os
, Address off
)
3718 Address start_off
= off
;
3719 off
+= this->orig_data_size_
;
3720 Address my_size
= this->plt_size_
+ this->branch_size_
;
3721 if (this->need_save_res_
)
3722 my_size
+= this->targ_
->savres_section()->data_size();
3724 off
= align_address(off
, this->stub_align());
3725 // Include original section size and alignment padding in size
3726 my_size
+= off
- start_off
;
3727 this->reset_address_and_file_offset();
3728 this->set_current_data_size(my_size
);
3729 this->set_address_and_file_offset(os
->address() + start_off
,
3730 os
->offset() + start_off
);
3735 stub_address() const
3737 return align_address(this->address() + this->orig_data_size_
,
3738 this->stub_align());
3744 return align_address(this->offset() + this->orig_data_size_
,
3745 this->stub_align());
3750 { return this->plt_size_
; }
3755 Output_section
* os
= this->output_section();
3756 if (os
->addralign() < this->stub_align())
3758 os
->set_addralign(this->stub_align());
3759 // FIXME: get rid of the insane checkpointing.
3760 // We can't increase alignment of the input section to which
3761 // stubs are attached; The input section may be .init which
3762 // is pasted together with other .init sections to form a
3763 // function. Aligning might insert zero padding resulting in
3764 // sigill. However we do need to increase alignment of the
3765 // output section so that the align_address() on offset in
3766 // set_address_and_size() adds the same padding as the
3767 // align_address() on address in stub_address().
3768 // What's more, we need this alignment for the layout done in
3769 // relaxation_loop_body() so that the output section starts at
3770 // a suitably aligned address.
3771 os
->checkpoint_set_addralign(this->stub_align());
3773 if (this->last_plt_size_
!= this->plt_size_
3774 || this->last_branch_size_
!= this->branch_size_
)
3776 this->last_plt_size_
= this->plt_size_
;
3777 this->last_branch_size_
= this->branch_size_
;
3783 // Add .eh_frame info for this stub section. Unlike other linker
3784 // generated .eh_frame this is added late in the link, because we
3785 // only want the .eh_frame info if this particular stub section is
3788 add_eh_frame(Layout
* layout
)
3790 if (!this->eh_frame_added_
)
3792 if (!parameters
->options().ld_generated_unwind_info())
3795 // Since we add stub .eh_frame info late, it must be placed
3796 // after all other linker generated .eh_frame info so that
3797 // merge mapping need not be updated for input sections.
3798 // There is no provision to use a different CIE to that used
3800 if (!this->targ_
->has_glink())
3803 layout
->add_eh_frame_for_plt(this,
3804 Eh_cie
<size
>::eh_frame_cie
,
3805 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3807 sizeof (default_fde
));
3808 this->eh_frame_added_
= true;
3812 Target_powerpc
<size
, big_endian
>*
3818 class Plt_stub_ent_hash
;
3819 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3820 Plt_stub_ent_hash
> Plt_stub_entries
;
3822 // Alignment of stub section.
3828 unsigned int min_align
= 32;
3829 unsigned int user_align
= 1 << parameters
->options().plt_align();
3830 return std::max(user_align
, min_align
);
3833 // Return the plt offset for the given call stub.
3835 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3837 const Symbol
* gsym
= p
->first
.sym_
;
3840 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3841 && gsym
->can_use_relative_reloc(false));
3842 return gsym
->plt_offset();
3847 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3848 unsigned int local_sym_index
= p
->first
.locsym_
;
3849 return relobj
->local_plt_offset(local_sym_index
);
3853 // Size of a given plt call stub.
3855 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3861 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3863 plt_addr
+= this->targ_
->iplt_section()->address();
3865 plt_addr
+= this->targ_
->plt_section()->address();
3866 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3867 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3868 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3869 got_addr
+= ppcobj
->toc_base_offset();
3870 Address off
= plt_addr
- got_addr
;
3871 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3872 if (this->targ_
->abiversion() < 2)
3874 bool static_chain
= parameters
->options().plt_static_chain();
3875 bool thread_safe
= this->targ_
->plt_thread_safe();
3879 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3881 unsigned int align
= 1 << parameters
->options().plt_align();
3883 bytes
= (bytes
+ align
- 1) & -align
;
3887 // Return long branch stub size.
3889 branch_stub_size(Address to
)
3892 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3893 if (to
- loc
+ (1 << 25) < 2 << 25)
3895 if (size
== 64 || !parameters
->options().output_is_position_independent())
3902 do_write(Output_file
*);
3904 // Plt call stub keys.
3908 Plt_stub_ent(const Symbol
* sym
)
3909 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3912 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3913 unsigned int locsym_index
)
3914 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3917 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3919 unsigned int r_type
,
3921 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3924 this->addend_
= addend
;
3925 else if (parameters
->options().output_is_position_independent()
3926 && r_type
== elfcpp::R_PPC_PLTREL24
)
3928 this->addend_
= addend
;
3929 if (this->addend_
>= 32768)
3930 this->object_
= object
;
3934 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3935 unsigned int locsym_index
,
3936 unsigned int r_type
,
3938 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3941 this->addend_
= addend
;
3942 else if (parameters
->options().output_is_position_independent()
3943 && r_type
== elfcpp::R_PPC_PLTREL24
)
3944 this->addend_
= addend
;
3947 bool operator==(const Plt_stub_ent
& that
) const
3949 return (this->sym_
== that
.sym_
3950 && this->object_
== that
.object_
3951 && this->addend_
== that
.addend_
3952 && this->locsym_
== that
.locsym_
);
3956 const Sized_relobj_file
<size
, big_endian
>* object_
;
3957 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3958 unsigned int locsym_
;
3961 class Plt_stub_ent_hash
3964 size_t operator()(const Plt_stub_ent
& ent
) const
3966 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3967 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3973 // Long branch stub keys.
3974 class Branch_stub_ent
3977 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
3978 Address to
, bool save_res
)
3979 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
3982 toc_base_off_
= obj
->toc_base_offset();
3985 bool operator==(const Branch_stub_ent
& that
) const
3987 return (this->dest_
== that
.dest_
3989 || this->toc_base_off_
== that
.toc_base_off_
));
3993 unsigned int toc_base_off_
;
3997 class Branch_stub_ent_hash
4000 size_t operator()(const Branch_stub_ent
& ent
) const
4001 { return ent
.dest_
^ ent
.toc_base_off_
; }
4004 // In a sane world this would be a global.
4005 Target_powerpc
<size
, big_endian
>* targ_
;
4006 // Map sym/object/addend to stub offset.
4007 Plt_stub_entries plt_call_stubs_
;
4008 // Map destination address to stub offset.
4009 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4010 Branch_stub_ent_hash
> Branch_stub_entries
;
4011 Branch_stub_entries long_branch_stubs_
;
4012 // size of input section
4013 section_size_type orig_data_size_
;
4015 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4016 // Whether .eh_frame info has been created for this stub section.
4017 bool eh_frame_added_
;
4018 // Set if this stub group needs a copy of out-of-line register
4019 // save/restore functions.
4020 bool need_save_res_
;
4023 // Add a plt call stub, if we do not already have one for this
4024 // sym/object/addend combo.
4026 template<int size
, bool big_endian
>
4028 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4030 const Sized_relobj_file
<size
, big_endian
>* object
,
4032 unsigned int r_type
,
4035 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4036 unsigned int off
= this->plt_size_
;
4037 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4038 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4040 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4041 return this->can_reach_stub(from
, off
, r_type
);
4044 template<int size
, bool big_endian
>
4046 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4048 const Sized_relobj_file
<size
, big_endian
>* object
,
4049 unsigned int locsym_index
,
4050 unsigned int r_type
,
4053 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4054 unsigned int off
= this->plt_size_
;
4055 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4056 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4058 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4059 return this->can_reach_stub(from
, off
, r_type
);
4062 // Find a plt call stub.
4064 template<int size
, bool big_endian
>
4065 typename Stub_table
<size
, big_endian
>::Address
4066 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4067 const Sized_relobj_file
<size
, big_endian
>* object
,
4069 unsigned int r_type
,
4070 Address addend
) const
4072 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4073 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4074 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4077 template<int size
, bool big_endian
>
4078 typename Stub_table
<size
, big_endian
>::Address
4079 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4081 Plt_stub_ent
ent(gsym
);
4082 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4083 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4086 template<int size
, bool big_endian
>
4087 typename Stub_table
<size
, big_endian
>::Address
4088 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4089 const Sized_relobj_file
<size
, big_endian
>* object
,
4090 unsigned int locsym_index
,
4091 unsigned int r_type
,
4092 Address addend
) const
4094 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4095 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4096 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4099 template<int size
, bool big_endian
>
4100 typename Stub_table
<size
, big_endian
>::Address
4101 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4102 const Sized_relobj_file
<size
, big_endian
>* object
,
4103 unsigned int locsym_index
) const
4105 Plt_stub_ent
ent(object
, locsym_index
);
4106 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4107 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4110 // Add a long branch stub if we don't already have one to given
4113 template<int size
, bool big_endian
>
4115 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4116 const Powerpc_relobj
<size
, big_endian
>* object
,
4117 unsigned int r_type
,
4122 Branch_stub_ent
ent(object
, to
, save_res
);
4123 Address off
= this->branch_size_
;
4124 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4127 this->need_save_res_
= true;
4130 unsigned int stub_size
= this->branch_stub_size(to
);
4131 this->branch_size_
= off
+ stub_size
;
4132 if (size
== 64 && stub_size
!= 4)
4133 this->targ_
->add_branch_lookup_table(to
);
4136 return this->can_reach_stub(from
, off
, r_type
);
4139 // Find long branch stub offset.
4141 template<int size
, bool big_endian
>
4142 typename Stub_table
<size
, big_endian
>::Address
4143 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4144 const Powerpc_relobj
<size
, big_endian
>* object
,
4147 Branch_stub_ent
ent(object
, to
, false);
4148 typename
Branch_stub_entries::const_iterator p
4149 = this->long_branch_stubs_
.find(ent
);
4150 if (p
== this->long_branch_stubs_
.end())
4151 return invalid_address
;
4152 if (p
->first
.save_res_
)
4153 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4157 // A class to handle .glink.
4159 template<int size
, bool big_endian
>
4160 class Output_data_glink
: public Output_section_data
4163 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4164 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4165 static const int pltresolve_size
= 16*4;
4167 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4168 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4169 end_branch_table_(), ge_size_(0)
4173 add_eh_frame(Layout
* layout
);
4176 add_global_entry(const Symbol
*);
4179 find_global_entry(const Symbol
*) const;
4182 global_entry_address() const
4184 gold_assert(this->is_data_size_valid());
4185 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4186 return this->address() + global_entry_off
;
4190 // Write to a map file.
4192 do_print_to_mapfile(Mapfile
* mapfile
) const
4193 { mapfile
->print_output_data(this, _("** glink")); }
4197 set_final_data_size();
4201 do_write(Output_file
*);
4203 // Allows access to .got and .plt for do_write.
4204 Target_powerpc
<size
, big_endian
>* targ_
;
4206 // Map sym to stub offset.
4207 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4208 Global_entry_stub_entries global_entry_stubs_
;
4210 unsigned int end_branch_table_
, ge_size_
;
4213 template<int size
, bool big_endian
>
4215 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4217 if (!parameters
->options().ld_generated_unwind_info())
4222 if (this->targ_
->abiversion() < 2)
4223 layout
->add_eh_frame_for_plt(this,
4224 Eh_cie
<64>::eh_frame_cie
,
4225 sizeof (Eh_cie
<64>::eh_frame_cie
),
4226 glink_eh_frame_fde_64v1
,
4227 sizeof (glink_eh_frame_fde_64v1
));
4229 layout
->add_eh_frame_for_plt(this,
4230 Eh_cie
<64>::eh_frame_cie
,
4231 sizeof (Eh_cie
<64>::eh_frame_cie
),
4232 glink_eh_frame_fde_64v2
,
4233 sizeof (glink_eh_frame_fde_64v2
));
4237 // 32-bit .glink can use the default since the CIE return
4238 // address reg, LR, is valid.
4239 layout
->add_eh_frame_for_plt(this,
4240 Eh_cie
<32>::eh_frame_cie
,
4241 sizeof (Eh_cie
<32>::eh_frame_cie
),
4243 sizeof (default_fde
));
4244 // Except where LR is used in a PIC __glink_PLTresolve.
4245 if (parameters
->options().output_is_position_independent())
4246 layout
->add_eh_frame_for_plt(this,
4247 Eh_cie
<32>::eh_frame_cie
,
4248 sizeof (Eh_cie
<32>::eh_frame_cie
),
4249 glink_eh_frame_fde_32
,
4250 sizeof (glink_eh_frame_fde_32
));
4254 template<int size
, bool big_endian
>
4256 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4258 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4259 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4261 this->ge_size_
+= 16;
4264 template<int size
, bool big_endian
>
4265 typename Output_data_glink
<size
, big_endian
>::Address
4266 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4268 typename
Global_entry_stub_entries::const_iterator p
4269 = this->global_entry_stubs_
.find(gsym
);
4270 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4273 template<int size
, bool big_endian
>
4275 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4277 unsigned int count
= this->targ_
->plt_entry_count();
4278 section_size_type total
= 0;
4284 // space for branch table
4285 total
+= 4 * (count
- 1);
4287 total
+= -total
& 15;
4288 total
+= this->pltresolve_size
;
4292 total
+= this->pltresolve_size
;
4294 // space for branch table
4296 if (this->targ_
->abiversion() < 2)
4300 total
+= 4 * (count
- 0x8000);
4304 this->end_branch_table_
= total
;
4305 total
= (total
+ 15) & -16;
4306 total
+= this->ge_size_
;
4308 this->set_data_size(total
);
4311 // Write out plt and long branch stub code.
4313 template<int size
, bool big_endian
>
4315 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4317 if (this->plt_call_stubs_
.empty()
4318 && this->long_branch_stubs_
.empty())
4321 const section_size_type start_off
= this->offset();
4322 const section_size_type off
= this->stub_offset();
4323 const section_size_type oview_size
=
4324 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4325 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4330 const Output_data_got_powerpc
<size
, big_endian
>* got
4331 = this->targ_
->got_section();
4332 Address got_os_addr
= got
->output_section()->address();
4334 if (!this->plt_call_stubs_
.empty())
4336 // The base address of the .plt section.
4337 Address plt_base
= this->targ_
->plt_section()->address();
4338 Address iplt_base
= invalid_address
;
4340 // Write out plt call stubs.
4341 typename
Plt_stub_entries::const_iterator cs
;
4342 for (cs
= this->plt_call_stubs_
.begin();
4343 cs
!= this->plt_call_stubs_
.end();
4347 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4348 Address plt_addr
= pltoff
;
4351 if (iplt_base
== invalid_address
)
4352 iplt_base
= this->targ_
->iplt_section()->address();
4353 plt_addr
+= iplt_base
;
4356 plt_addr
+= plt_base
;
4357 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4358 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4359 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4360 Address off
= plt_addr
- got_addr
;
4362 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4363 gold_error(_("%s: linkage table error against `%s'"),
4364 cs
->first
.object_
->name().c_str(),
4365 cs
->first
.sym_
->demangled_name().c_str());
4367 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4369 = plt_load_toc
&& parameters
->options().plt_static_chain();
4371 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4372 bool use_fake_dep
= false;
4373 Address cmp_branch_off
= 0;
4376 unsigned int pltindex
4377 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4378 / this->targ_
->plt_entry_size());
4380 = (this->targ_
->glink_section()->pltresolve_size
4382 if (pltindex
> 32768)
4383 glinkoff
+= (pltindex
- 32768) * 4;
4385 = this->targ_
->glink_section()->address() + glinkoff
;
4387 = (this->stub_address() + cs
->second
+ 24
4388 + 4 * (ha(off
) != 0)
4389 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4390 + 4 * static_chain
);
4391 cmp_branch_off
= to
- from
;
4392 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4395 p
= oview
+ cs
->second
;
4398 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4402 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4404 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4409 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4411 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4415 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4417 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4421 write_insn
<big_endian
>(p
, mtctr_12
);
4427 write_insn
<big_endian
>(p
, xor_2_12_12
);
4429 write_insn
<big_endian
>(p
, add_11_11_2
);
4432 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4436 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4443 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4445 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4448 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4450 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4454 write_insn
<big_endian
>(p
, mtctr_12
);
4460 write_insn
<big_endian
>(p
, xor_11_12_12
);
4462 write_insn
<big_endian
>(p
, add_2_2_11
);
4467 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4470 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4474 if (thread_safe
&& !use_fake_dep
)
4476 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4478 write_insn
<big_endian
>(p
, bnectr_p4
);
4480 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4483 write_insn
<big_endian
>(p
, bctr
);
4487 // Write out long branch stubs.
4488 typename
Branch_stub_entries::const_iterator bs
;
4489 for (bs
= this->long_branch_stubs_
.begin();
4490 bs
!= this->long_branch_stubs_
.end();
4493 if (bs
->first
.save_res_
)
4495 p
= oview
+ this->plt_size_
+ bs
->second
;
4496 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4497 Address delta
= bs
->first
.dest_
- loc
;
4498 if (delta
+ (1 << 25) < 2 << 25)
4499 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4503 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4504 gold_assert(brlt_addr
!= invalid_address
);
4505 brlt_addr
+= this->targ_
->brlt_section()->address();
4506 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4507 Address brltoff
= brlt_addr
- got_addr
;
4508 if (ha(brltoff
) == 0)
4510 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4514 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4515 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4517 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4518 write_insn
<big_endian
>(p
, bctr
);
4524 if (!this->plt_call_stubs_
.empty())
4526 // The base address of the .plt section.
4527 Address plt_base
= this->targ_
->plt_section()->address();
4528 Address iplt_base
= invalid_address
;
4529 // The address of _GLOBAL_OFFSET_TABLE_.
4530 Address g_o_t
= invalid_address
;
4532 // Write out plt call stubs.
4533 typename
Plt_stub_entries::const_iterator cs
;
4534 for (cs
= this->plt_call_stubs_
.begin();
4535 cs
!= this->plt_call_stubs_
.end();
4539 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4542 if (iplt_base
== invalid_address
)
4543 iplt_base
= this->targ_
->iplt_section()->address();
4544 plt_addr
+= iplt_base
;
4547 plt_addr
+= plt_base
;
4549 p
= oview
+ cs
->second
;
4550 if (parameters
->options().output_is_position_independent())
4553 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4554 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4555 (cs
->first
.object_
));
4556 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4558 unsigned int got2
= ppcobj
->got2_shndx();
4559 got_addr
= ppcobj
->get_output_section_offset(got2
);
4560 gold_assert(got_addr
!= invalid_address
);
4561 got_addr
+= (ppcobj
->output_section(got2
)->address()
4562 + cs
->first
.addend_
);
4566 if (g_o_t
== invalid_address
)
4568 const Output_data_got_powerpc
<size
, big_endian
>* got
4569 = this->targ_
->got_section();
4570 g_o_t
= got
->address() + got
->g_o_t();
4575 Address off
= plt_addr
- got_addr
;
4578 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4579 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4580 write_insn
<big_endian
>(p
+ 8, bctr
);
4584 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4585 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4586 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4587 write_insn
<big_endian
>(p
+ 12, bctr
);
4592 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4593 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4594 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4595 write_insn
<big_endian
>(p
+ 12, bctr
);
4600 // Write out long branch stubs.
4601 typename
Branch_stub_entries::const_iterator bs
;
4602 for (bs
= this->long_branch_stubs_
.begin();
4603 bs
!= this->long_branch_stubs_
.end();
4606 if (bs
->first
.save_res_
)
4608 p
= oview
+ this->plt_size_
+ bs
->second
;
4609 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4610 Address delta
= bs
->first
.dest_
- loc
;
4611 if (delta
+ (1 << 25) < 2 << 25)
4612 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4613 else if (!parameters
->options().output_is_position_independent())
4615 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4616 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4617 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4618 write_insn
<big_endian
>(p
+ 12, bctr
);
4623 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4624 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4625 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4626 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4627 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4628 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4629 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4630 write_insn
<big_endian
>(p
+ 28, bctr
);
4634 if (this->need_save_res_
)
4636 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4637 memcpy (p
, this->targ_
->savres_section()->contents(),
4638 this->targ_
->savres_section()->data_size());
4642 // Write out .glink.
4644 template<int size
, bool big_endian
>
4646 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4648 const section_size_type off
= this->offset();
4649 const section_size_type oview_size
=
4650 convert_to_section_size_type(this->data_size());
4651 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4654 // The base address of the .plt section.
4655 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4656 Address plt_base
= this->targ_
->plt_section()->address();
4660 if (this->end_branch_table_
!= 0)
4662 // Write pltresolve stub.
4664 Address after_bcl
= this->address() + 16;
4665 Address pltoff
= plt_base
- after_bcl
;
4667 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4669 if (this->targ_
->abiversion() < 2)
4671 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4672 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4673 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4674 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4675 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4676 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4677 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4678 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4679 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4680 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4684 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4685 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4686 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4687 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4688 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4689 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4690 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4691 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4692 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4693 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4694 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4695 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4697 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4698 while (p
< oview
+ this->pltresolve_size
)
4699 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4701 // Write lazy link call stubs.
4703 while (p
< oview
+ this->end_branch_table_
)
4705 if (this->targ_
->abiversion() < 2)
4709 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4713 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4714 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4717 uint32_t branch_off
= 8 - (p
- oview
);
4718 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4723 Address plt_base
= this->targ_
->plt_section()->address();
4724 Address iplt_base
= invalid_address
;
4725 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4726 Address global_entry_base
= this->address() + global_entry_off
;
4727 typename
Global_entry_stub_entries::const_iterator ge
;
4728 for (ge
= this->global_entry_stubs_
.begin();
4729 ge
!= this->global_entry_stubs_
.end();
4732 p
= oview
+ global_entry_off
+ ge
->second
;
4733 Address plt_addr
= ge
->first
->plt_offset();
4734 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4735 && ge
->first
->can_use_relative_reloc(false))
4737 if (iplt_base
== invalid_address
)
4738 iplt_base
= this->targ_
->iplt_section()->address();
4739 plt_addr
+= iplt_base
;
4742 plt_addr
+= plt_base
;
4743 Address my_addr
= global_entry_base
+ ge
->second
;
4744 Address off
= plt_addr
- my_addr
;
4746 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4747 gold_error(_("%s: linkage table error against `%s'"),
4748 ge
->first
->object()->name().c_str(),
4749 ge
->first
->demangled_name().c_str());
4751 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4752 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4753 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4754 write_insn
<big_endian
>(p
, bctr
);
4759 const Output_data_got_powerpc
<size
, big_endian
>* got
4760 = this->targ_
->got_section();
4761 // The address of _GLOBAL_OFFSET_TABLE_.
4762 Address g_o_t
= got
->address() + got
->g_o_t();
4764 // Write out pltresolve branch table.
4766 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4767 unsigned char* end_p
= oview
+ the_end
;
4768 while (p
< end_p
- 8 * 4)
4769 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4771 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4773 // Write out pltresolve call stub.
4774 if (parameters
->options().output_is_position_independent())
4776 Address res0_off
= 0;
4777 Address after_bcl_off
= the_end
+ 12;
4778 Address bcl_res0
= after_bcl_off
- res0_off
;
4780 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4781 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4782 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4783 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4784 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4785 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4786 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4788 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4790 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4791 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4793 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4794 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4798 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4799 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4801 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4802 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4803 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4804 write_insn
<big_endian
>(p
+ 52, bctr
);
4805 write_insn
<big_endian
>(p
+ 56, nop
);
4806 write_insn
<big_endian
>(p
+ 60, nop
);
4810 Address res0
= this->address();
4812 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4813 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4814 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4815 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4817 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4818 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4819 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4820 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4821 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4822 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4824 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4825 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4826 write_insn
<big_endian
>(p
+ 32, bctr
);
4827 write_insn
<big_endian
>(p
+ 36, nop
);
4828 write_insn
<big_endian
>(p
+ 40, nop
);
4829 write_insn
<big_endian
>(p
+ 44, nop
);
4830 write_insn
<big_endian
>(p
+ 48, nop
);
4831 write_insn
<big_endian
>(p
+ 52, nop
);
4832 write_insn
<big_endian
>(p
+ 56, nop
);
4833 write_insn
<big_endian
>(p
+ 60, nop
);
4838 of
->write_output_view(off
, oview_size
, oview
);
4842 // A class to handle linker generated save/restore functions.
4844 template<int size
, bool big_endian
>
4845 class Output_data_save_res
: public Output_section_data_build
4848 Output_data_save_res(Symbol_table
* symtab
);
4850 const unsigned char*
4857 // Write to a map file.
4859 do_print_to_mapfile(Mapfile
* mapfile
) const
4860 { mapfile
->print_output_data(this, _("** save/restore")); }
4863 do_write(Output_file
*);
4866 // The maximum size of save/restore contents.
4867 static const unsigned int savres_max
= 218*4;
4870 savres_define(Symbol_table
* symtab
,
4872 unsigned int lo
, unsigned int hi
,
4873 unsigned char* write_ent(unsigned char*, int),
4874 unsigned char* write_tail(unsigned char*, int));
4876 unsigned char *contents_
;
4879 template<bool big_endian
>
4880 static unsigned char*
4881 savegpr0(unsigned char* p
, int r
)
4883 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4884 write_insn
<big_endian
>(p
, insn
);
4888 template<bool big_endian
>
4889 static unsigned char*
4890 savegpr0_tail(unsigned char* p
, int r
)
4892 p
= savegpr0
<big_endian
>(p
, r
);
4893 uint32_t insn
= std_0_1
+ 16;
4894 write_insn
<big_endian
>(p
, insn
);
4896 write_insn
<big_endian
>(p
, blr
);
4900 template<bool big_endian
>
4901 static unsigned char*
4902 restgpr0(unsigned char* p
, int r
)
4904 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4905 write_insn
<big_endian
>(p
, insn
);
4909 template<bool big_endian
>
4910 static unsigned char*
4911 restgpr0_tail(unsigned char* p
, int r
)
4913 uint32_t insn
= ld_0_1
+ 16;
4914 write_insn
<big_endian
>(p
, insn
);
4916 p
= restgpr0
<big_endian
>(p
, r
);
4917 write_insn
<big_endian
>(p
, mtlr_0
);
4921 p
= restgpr0
<big_endian
>(p
, 30);
4922 p
= restgpr0
<big_endian
>(p
, 31);
4924 write_insn
<big_endian
>(p
, blr
);
4928 template<bool big_endian
>
4929 static unsigned char*
4930 savegpr1(unsigned char* p
, int r
)
4932 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4933 write_insn
<big_endian
>(p
, insn
);
4937 template<bool big_endian
>
4938 static unsigned char*
4939 savegpr1_tail(unsigned char* p
, int r
)
4941 p
= savegpr1
<big_endian
>(p
, r
);
4942 write_insn
<big_endian
>(p
, blr
);
4946 template<bool big_endian
>
4947 static unsigned char*
4948 restgpr1(unsigned char* p
, int r
)
4950 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4951 write_insn
<big_endian
>(p
, insn
);
4955 template<bool big_endian
>
4956 static unsigned char*
4957 restgpr1_tail(unsigned char* p
, int r
)
4959 p
= restgpr1
<big_endian
>(p
, r
);
4960 write_insn
<big_endian
>(p
, blr
);
4964 template<bool big_endian
>
4965 static unsigned char*
4966 savefpr(unsigned char* p
, int r
)
4968 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4969 write_insn
<big_endian
>(p
, insn
);
4973 template<bool big_endian
>
4974 static unsigned char*
4975 savefpr0_tail(unsigned char* p
, int r
)
4977 p
= savefpr
<big_endian
>(p
, r
);
4978 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4980 write_insn
<big_endian
>(p
, blr
);
4984 template<bool big_endian
>
4985 static unsigned char*
4986 restfpr(unsigned char* p
, int r
)
4988 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4989 write_insn
<big_endian
>(p
, insn
);
4993 template<bool big_endian
>
4994 static unsigned char*
4995 restfpr0_tail(unsigned char* p
, int r
)
4997 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4999 p
= restfpr
<big_endian
>(p
, r
);
5000 write_insn
<big_endian
>(p
, mtlr_0
);
5004 p
= restfpr
<big_endian
>(p
, 30);
5005 p
= restfpr
<big_endian
>(p
, 31);
5007 write_insn
<big_endian
>(p
, blr
);
5011 template<bool big_endian
>
5012 static unsigned char*
5013 savefpr1_tail(unsigned char* p
, int r
)
5015 p
= savefpr
<big_endian
>(p
, r
);
5016 write_insn
<big_endian
>(p
, blr
);
5020 template<bool big_endian
>
5021 static unsigned char*
5022 restfpr1_tail(unsigned char* p
, int r
)
5024 p
= restfpr
<big_endian
>(p
, r
);
5025 write_insn
<big_endian
>(p
, blr
);
5029 template<bool big_endian
>
5030 static unsigned char*
5031 savevr(unsigned char* p
, int r
)
5033 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5034 write_insn
<big_endian
>(p
, insn
);
5036 insn
= stvx_0_12_0
+ (r
<< 21);
5037 write_insn
<big_endian
>(p
, insn
);
5041 template<bool big_endian
>
5042 static unsigned char*
5043 savevr_tail(unsigned char* p
, int r
)
5045 p
= savevr
<big_endian
>(p
, r
);
5046 write_insn
<big_endian
>(p
, blr
);
5050 template<bool big_endian
>
5051 static unsigned char*
5052 restvr(unsigned char* p
, int r
)
5054 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5055 write_insn
<big_endian
>(p
, insn
);
5057 insn
= lvx_0_12_0
+ (r
<< 21);
5058 write_insn
<big_endian
>(p
, insn
);
5062 template<bool big_endian
>
5063 static unsigned char*
5064 restvr_tail(unsigned char* p
, int r
)
5066 p
= restvr
<big_endian
>(p
, r
);
5067 write_insn
<big_endian
>(p
, blr
);
5072 template<int size
, bool big_endian
>
5073 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5074 Symbol_table
* symtab
)
5075 : Output_section_data_build(4),
5078 this->savres_define(symtab
,
5079 "_savegpr0_", 14, 31,
5080 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5081 this->savres_define(symtab
,
5082 "_restgpr0_", 14, 29,
5083 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5084 this->savres_define(symtab
,
5085 "_restgpr0_", 30, 31,
5086 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5087 this->savres_define(symtab
,
5088 "_savegpr1_", 14, 31,
5089 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5090 this->savres_define(symtab
,
5091 "_restgpr1_", 14, 31,
5092 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5093 this->savres_define(symtab
,
5094 "_savefpr_", 14, 31,
5095 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5096 this->savres_define(symtab
,
5097 "_restfpr_", 14, 29,
5098 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5099 this->savres_define(symtab
,
5100 "_restfpr_", 30, 31,
5101 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5102 this->savres_define(symtab
,
5104 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5105 this->savres_define(symtab
,
5107 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5108 this->savres_define(symtab
,
5110 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5111 this->savres_define(symtab
,
5113 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5116 template<int size
, bool big_endian
>
5118 Output_data_save_res
<size
, big_endian
>::savres_define(
5119 Symbol_table
* symtab
,
5121 unsigned int lo
, unsigned int hi
,
5122 unsigned char* write_ent(unsigned char*, int),
5123 unsigned char* write_tail(unsigned char*, int))
5125 size_t len
= strlen(name
);
5126 bool writing
= false;
5129 memcpy(sym
, name
, len
);
5132 for (unsigned int i
= lo
; i
<= hi
; i
++)
5134 sym
[len
+ 0] = i
/ 10 + '0';
5135 sym
[len
+ 1] = i
% 10 + '0';
5136 Symbol
* gsym
= symtab
->lookup(sym
);
5137 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5138 writing
= writing
|| refd
;
5141 if (this->contents_
== NULL
)
5142 this->contents_
= new unsigned char[this->savres_max
];
5144 section_size_type value
= this->current_data_size();
5145 unsigned char* p
= this->contents_
+ value
;
5147 p
= write_ent(p
, i
);
5149 p
= write_tail(p
, i
);
5150 section_size_type cur_size
= p
- this->contents_
;
5151 this->set_current_data_size(cur_size
);
5153 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5154 this, value
, cur_size
- value
,
5155 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5156 elfcpp::STV_HIDDEN
, 0, false, false);
5161 // Write out save/restore.
5163 template<int size
, bool big_endian
>
5165 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5167 const section_size_type off
= this->offset();
5168 const section_size_type oview_size
=
5169 convert_to_section_size_type(this->data_size());
5170 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5171 memcpy(oview
, this->contents_
, oview_size
);
5172 of
->write_output_view(off
, oview_size
, oview
);
5176 // Create the glink section.
5178 template<int size
, bool big_endian
>
5180 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5182 if (this->glink_
== NULL
)
5184 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5185 this->glink_
->add_eh_frame(layout
);
5186 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5187 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5188 this->glink_
, ORDER_TEXT
, false);
5192 // Create a PLT entry for a global symbol.
5194 template<int size
, bool big_endian
>
5196 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5200 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5201 && gsym
->can_use_relative_reloc(false))
5203 if (this->iplt_
== NULL
)
5204 this->make_iplt_section(symtab
, layout
);
5205 this->iplt_
->add_ifunc_entry(gsym
);
5209 if (this->plt_
== NULL
)
5210 this->make_plt_section(symtab
, layout
);
5211 this->plt_
->add_entry(gsym
);
5215 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5217 template<int size
, bool big_endian
>
5219 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5220 Symbol_table
* symtab
,
5222 Sized_relobj_file
<size
, big_endian
>* relobj
,
5225 if (this->iplt_
== NULL
)
5226 this->make_iplt_section(symtab
, layout
);
5227 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5230 // Return the number of entries in the PLT.
5232 template<int size
, bool big_endian
>
5234 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5236 if (this->plt_
== NULL
)
5238 return this->plt_
->entry_count();
5241 // Create a GOT entry for local dynamic __tls_get_addr calls.
5243 template<int size
, bool big_endian
>
5245 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5246 Symbol_table
* symtab
,
5248 Sized_relobj_file
<size
, big_endian
>* object
)
5250 if (this->tlsld_got_offset_
== -1U)
5252 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5253 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5254 Output_data_got_powerpc
<size
, big_endian
>* got
5255 = this->got_section(symtab
, layout
);
5256 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5257 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5259 this->tlsld_got_offset_
= got_offset
;
5261 return this->tlsld_got_offset_
;
5264 // Get the Reference_flags for a particular relocation.
5266 template<int size
, bool big_endian
>
5268 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5269 unsigned int r_type
,
5270 const Target_powerpc
* target
)
5276 case elfcpp::R_POWERPC_NONE
:
5277 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5278 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5279 case elfcpp::R_PPC64_TOC
:
5280 // No symbol reference.
5283 case elfcpp::R_PPC64_ADDR64
:
5284 case elfcpp::R_PPC64_UADDR64
:
5285 case elfcpp::R_POWERPC_ADDR32
:
5286 case elfcpp::R_POWERPC_UADDR32
:
5287 case elfcpp::R_POWERPC_ADDR16
:
5288 case elfcpp::R_POWERPC_UADDR16
:
5289 case elfcpp::R_POWERPC_ADDR16_LO
:
5290 case elfcpp::R_POWERPC_ADDR16_HI
:
5291 case elfcpp::R_POWERPC_ADDR16_HA
:
5292 ref
= Symbol::ABSOLUTE_REF
;
5295 case elfcpp::R_POWERPC_ADDR24
:
5296 case elfcpp::R_POWERPC_ADDR14
:
5297 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5298 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5299 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5302 case elfcpp::R_PPC64_REL64
:
5303 case elfcpp::R_POWERPC_REL32
:
5304 case elfcpp::R_PPC_LOCAL24PC
:
5305 case elfcpp::R_POWERPC_REL16
:
5306 case elfcpp::R_POWERPC_REL16_LO
:
5307 case elfcpp::R_POWERPC_REL16_HI
:
5308 case elfcpp::R_POWERPC_REL16_HA
:
5309 ref
= Symbol::RELATIVE_REF
;
5312 case elfcpp::R_POWERPC_REL24
:
5313 case elfcpp::R_PPC_PLTREL24
:
5314 case elfcpp::R_POWERPC_REL14
:
5315 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5316 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5317 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5320 case elfcpp::R_POWERPC_GOT16
:
5321 case elfcpp::R_POWERPC_GOT16_LO
:
5322 case elfcpp::R_POWERPC_GOT16_HI
:
5323 case elfcpp::R_POWERPC_GOT16_HA
:
5324 case elfcpp::R_PPC64_GOT16_DS
:
5325 case elfcpp::R_PPC64_GOT16_LO_DS
:
5326 case elfcpp::R_PPC64_TOC16
:
5327 case elfcpp::R_PPC64_TOC16_LO
:
5328 case elfcpp::R_PPC64_TOC16_HI
:
5329 case elfcpp::R_PPC64_TOC16_HA
:
5330 case elfcpp::R_PPC64_TOC16_DS
:
5331 case elfcpp::R_PPC64_TOC16_LO_DS
:
5332 ref
= Symbol::RELATIVE_REF
;
5335 case elfcpp::R_POWERPC_GOT_TPREL16
:
5336 case elfcpp::R_POWERPC_TLS
:
5337 ref
= Symbol::TLS_REF
;
5340 case elfcpp::R_POWERPC_COPY
:
5341 case elfcpp::R_POWERPC_GLOB_DAT
:
5342 case elfcpp::R_POWERPC_JMP_SLOT
:
5343 case elfcpp::R_POWERPC_RELATIVE
:
5344 case elfcpp::R_POWERPC_DTPMOD
:
5346 // Not expected. We will give an error later.
5350 if (size
== 64 && target
->abiversion() < 2)
5351 ref
|= Symbol::FUNC_DESC_ABI
;
5355 // Report an unsupported relocation against a local symbol.
5357 template<int size
, bool big_endian
>
5359 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5360 Sized_relobj_file
<size
, big_endian
>* object
,
5361 unsigned int r_type
)
5363 gold_error(_("%s: unsupported reloc %u against local symbol"),
5364 object
->name().c_str(), r_type
);
5367 // We are about to emit a dynamic relocation of type R_TYPE. If the
5368 // dynamic linker does not support it, issue an error.
5370 template<int size
, bool big_endian
>
5372 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5373 unsigned int r_type
)
5375 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5377 // These are the relocation types supported by glibc for both 32-bit
5378 // and 64-bit powerpc.
5381 case elfcpp::R_POWERPC_NONE
:
5382 case elfcpp::R_POWERPC_RELATIVE
:
5383 case elfcpp::R_POWERPC_GLOB_DAT
:
5384 case elfcpp::R_POWERPC_DTPMOD
:
5385 case elfcpp::R_POWERPC_DTPREL
:
5386 case elfcpp::R_POWERPC_TPREL
:
5387 case elfcpp::R_POWERPC_JMP_SLOT
:
5388 case elfcpp::R_POWERPC_COPY
:
5389 case elfcpp::R_POWERPC_IRELATIVE
:
5390 case elfcpp::R_POWERPC_ADDR32
:
5391 case elfcpp::R_POWERPC_UADDR32
:
5392 case elfcpp::R_POWERPC_ADDR24
:
5393 case elfcpp::R_POWERPC_ADDR16
:
5394 case elfcpp::R_POWERPC_UADDR16
:
5395 case elfcpp::R_POWERPC_ADDR16_LO
:
5396 case elfcpp::R_POWERPC_ADDR16_HI
:
5397 case elfcpp::R_POWERPC_ADDR16_HA
:
5398 case elfcpp::R_POWERPC_ADDR14
:
5399 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5400 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5401 case elfcpp::R_POWERPC_REL32
:
5402 case elfcpp::R_POWERPC_REL24
:
5403 case elfcpp::R_POWERPC_TPREL16
:
5404 case elfcpp::R_POWERPC_TPREL16_LO
:
5405 case elfcpp::R_POWERPC_TPREL16_HI
:
5406 case elfcpp::R_POWERPC_TPREL16_HA
:
5417 // These are the relocation types supported only on 64-bit.
5418 case elfcpp::R_PPC64_ADDR64
:
5419 case elfcpp::R_PPC64_UADDR64
:
5420 case elfcpp::R_PPC64_JMP_IREL
:
5421 case elfcpp::R_PPC64_ADDR16_DS
:
5422 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5423 case elfcpp::R_PPC64_ADDR16_HIGH
:
5424 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5425 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5426 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5427 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5428 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5429 case elfcpp::R_PPC64_REL64
:
5430 case elfcpp::R_POWERPC_ADDR30
:
5431 case elfcpp::R_PPC64_TPREL16_DS
:
5432 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5433 case elfcpp::R_PPC64_TPREL16_HIGH
:
5434 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5435 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5436 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5437 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5438 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5449 // These are the relocation types supported only on 32-bit.
5450 // ??? glibc ld.so doesn't need to support these.
5451 case elfcpp::R_POWERPC_DTPREL16
:
5452 case elfcpp::R_POWERPC_DTPREL16_LO
:
5453 case elfcpp::R_POWERPC_DTPREL16_HI
:
5454 case elfcpp::R_POWERPC_DTPREL16_HA
:
5462 // This prevents us from issuing more than one error per reloc
5463 // section. But we can still wind up issuing more than one
5464 // error per object file.
5465 if (this->issued_non_pic_error_
)
5467 gold_assert(parameters
->options().output_is_position_independent());
5468 object
->error(_("requires unsupported dynamic reloc; "
5469 "recompile with -fPIC"));
5470 this->issued_non_pic_error_
= true;
5474 // Return whether we need to make a PLT entry for a relocation of the
5475 // given type against a STT_GNU_IFUNC symbol.
5477 template<int size
, bool big_endian
>
5479 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5480 Target_powerpc
<size
, big_endian
>* target
,
5481 Sized_relobj_file
<size
, big_endian
>* object
,
5482 unsigned int r_type
,
5485 // In non-pic code any reference will resolve to the plt call stub
5486 // for the ifunc symbol.
5487 if ((size
== 32 || target
->abiversion() >= 2)
5488 && !parameters
->options().output_is_position_independent())
5493 // Word size refs from data sections are OK, but don't need a PLT entry.
5494 case elfcpp::R_POWERPC_ADDR32
:
5495 case elfcpp::R_POWERPC_UADDR32
:
5500 case elfcpp::R_PPC64_ADDR64
:
5501 case elfcpp::R_PPC64_UADDR64
:
5506 // GOT refs are good, but also don't need a PLT entry.
5507 case elfcpp::R_POWERPC_GOT16
:
5508 case elfcpp::R_POWERPC_GOT16_LO
:
5509 case elfcpp::R_POWERPC_GOT16_HI
:
5510 case elfcpp::R_POWERPC_GOT16_HA
:
5511 case elfcpp::R_PPC64_GOT16_DS
:
5512 case elfcpp::R_PPC64_GOT16_LO_DS
:
5515 // Function calls are good, and these do need a PLT entry.
5516 case elfcpp::R_POWERPC_ADDR24
:
5517 case elfcpp::R_POWERPC_ADDR14
:
5518 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5519 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5520 case elfcpp::R_POWERPC_REL24
:
5521 case elfcpp::R_PPC_PLTREL24
:
5522 case elfcpp::R_POWERPC_REL14
:
5523 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5524 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5531 // Anything else is a problem.
5532 // If we are building a static executable, the libc startup function
5533 // responsible for applying indirect function relocations is going
5534 // to complain about the reloc type.
5535 // If we are building a dynamic executable, we will have a text
5536 // relocation. The dynamic loader will set the text segment
5537 // writable and non-executable to apply text relocations. So we'll
5538 // segfault when trying to run the indirection function to resolve
5541 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5542 object
->name().c_str(), r_type
);
5546 // Scan a relocation for a local symbol.
5548 template<int size
, bool big_endian
>
5550 Target_powerpc
<size
, big_endian
>::Scan::local(
5551 Symbol_table
* symtab
,
5553 Target_powerpc
<size
, big_endian
>* target
,
5554 Sized_relobj_file
<size
, big_endian
>* object
,
5555 unsigned int data_shndx
,
5556 Output_section
* output_section
,
5557 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5558 unsigned int r_type
,
5559 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5562 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5564 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5565 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5567 this->expect_tls_get_addr_call();
5568 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5569 if (tls_type
!= tls::TLSOPT_NONE
)
5570 this->skip_next_tls_get_addr_call();
5572 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5573 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5575 this->expect_tls_get_addr_call();
5576 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5577 if (tls_type
!= tls::TLSOPT_NONE
)
5578 this->skip_next_tls_get_addr_call();
5581 Powerpc_relobj
<size
, big_endian
>* ppc_object
5582 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5587 && data_shndx
== ppc_object
->opd_shndx()
5588 && r_type
== elfcpp::R_PPC64_ADDR64
)
5589 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5593 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5594 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5595 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5597 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5598 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5599 r_type
, r_sym
, reloc
.get_r_addend());
5600 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5605 case elfcpp::R_POWERPC_NONE
:
5606 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5607 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5608 case elfcpp::R_PPC64_TOCSAVE
:
5609 case elfcpp::R_POWERPC_TLS
:
5610 case elfcpp::R_PPC64_ENTRY
:
5613 case elfcpp::R_PPC64_TOC
:
5615 Output_data_got_powerpc
<size
, big_endian
>* got
5616 = target
->got_section(symtab
, layout
);
5617 if (parameters
->options().output_is_position_independent())
5619 Address off
= reloc
.get_r_offset();
5621 && target
->abiversion() < 2
5622 && data_shndx
== ppc_object
->opd_shndx()
5623 && ppc_object
->get_opd_discard(off
- 8))
5626 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5627 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5628 rela_dyn
->add_output_section_relative(got
->output_section(),
5629 elfcpp::R_POWERPC_RELATIVE
,
5631 object
, data_shndx
, off
,
5632 symobj
->toc_base_offset());
5637 case elfcpp::R_PPC64_ADDR64
:
5638 case elfcpp::R_PPC64_UADDR64
:
5639 case elfcpp::R_POWERPC_ADDR32
:
5640 case elfcpp::R_POWERPC_UADDR32
:
5641 case elfcpp::R_POWERPC_ADDR24
:
5642 case elfcpp::R_POWERPC_ADDR16
:
5643 case elfcpp::R_POWERPC_ADDR16_LO
:
5644 case elfcpp::R_POWERPC_ADDR16_HI
:
5645 case elfcpp::R_POWERPC_ADDR16_HA
:
5646 case elfcpp::R_POWERPC_UADDR16
:
5647 case elfcpp::R_PPC64_ADDR16_HIGH
:
5648 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5649 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5650 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5651 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5652 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5653 case elfcpp::R_PPC64_ADDR16_DS
:
5654 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5655 case elfcpp::R_POWERPC_ADDR14
:
5656 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5657 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5658 // If building a shared library (or a position-independent
5659 // executable), we need to create a dynamic relocation for
5661 if (parameters
->options().output_is_position_independent()
5662 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5664 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5666 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5667 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5668 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5670 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5671 : elfcpp::R_POWERPC_RELATIVE
);
5672 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5673 output_section
, data_shndx
,
5674 reloc
.get_r_offset(),
5675 reloc
.get_r_addend(), false);
5677 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5679 check_non_pic(object
, r_type
);
5680 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5681 data_shndx
, reloc
.get_r_offset(),
5682 reloc
.get_r_addend());
5686 gold_assert(lsym
.get_st_value() == 0);
5687 unsigned int shndx
= lsym
.get_st_shndx();
5689 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5692 object
->error(_("section symbol %u has bad shndx %u"),
5695 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5696 output_section
, data_shndx
,
5697 reloc
.get_r_offset());
5702 case elfcpp::R_POWERPC_REL24
:
5703 case elfcpp::R_PPC_PLTREL24
:
5704 case elfcpp::R_PPC_LOCAL24PC
:
5705 case elfcpp::R_POWERPC_REL14
:
5706 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5707 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5709 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5710 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5711 reloc
.get_r_addend());
5714 case elfcpp::R_PPC64_REL64
:
5715 case elfcpp::R_POWERPC_REL32
:
5716 case elfcpp::R_POWERPC_REL16
:
5717 case elfcpp::R_POWERPC_REL16_LO
:
5718 case elfcpp::R_POWERPC_REL16_HI
:
5719 case elfcpp::R_POWERPC_REL16_HA
:
5720 case elfcpp::R_POWERPC_REL16DX_HA
:
5721 case elfcpp::R_POWERPC_SECTOFF
:
5722 case elfcpp::R_POWERPC_SECTOFF_LO
:
5723 case elfcpp::R_POWERPC_SECTOFF_HI
:
5724 case elfcpp::R_POWERPC_SECTOFF_HA
:
5725 case elfcpp::R_PPC64_SECTOFF_DS
:
5726 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5727 case elfcpp::R_POWERPC_TPREL16
:
5728 case elfcpp::R_POWERPC_TPREL16_LO
:
5729 case elfcpp::R_POWERPC_TPREL16_HI
:
5730 case elfcpp::R_POWERPC_TPREL16_HA
:
5731 case elfcpp::R_PPC64_TPREL16_DS
:
5732 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5733 case elfcpp::R_PPC64_TPREL16_HIGH
:
5734 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5735 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5736 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5737 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5738 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5739 case elfcpp::R_POWERPC_DTPREL16
:
5740 case elfcpp::R_POWERPC_DTPREL16_LO
:
5741 case elfcpp::R_POWERPC_DTPREL16_HI
:
5742 case elfcpp::R_POWERPC_DTPREL16_HA
:
5743 case elfcpp::R_PPC64_DTPREL16_DS
:
5744 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5745 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5746 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5747 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5748 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5749 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5750 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5751 case elfcpp::R_PPC64_TLSGD
:
5752 case elfcpp::R_PPC64_TLSLD
:
5753 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5756 case elfcpp::R_POWERPC_GOT16
:
5757 case elfcpp::R_POWERPC_GOT16_LO
:
5758 case elfcpp::R_POWERPC_GOT16_HI
:
5759 case elfcpp::R_POWERPC_GOT16_HA
:
5760 case elfcpp::R_PPC64_GOT16_DS
:
5761 case elfcpp::R_PPC64_GOT16_LO_DS
:
5763 // The symbol requires a GOT entry.
5764 Output_data_got_powerpc
<size
, big_endian
>* got
5765 = target
->got_section(symtab
, layout
);
5766 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5768 if (!parameters
->options().output_is_position_independent())
5771 && (size
== 32 || target
->abiversion() >= 2))
5772 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5774 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5776 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5778 // If we are generating a shared object or a pie, this
5779 // symbol's GOT entry will be set by a dynamic relocation.
5781 off
= got
->add_constant(0);
5782 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5784 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5786 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5787 : elfcpp::R_POWERPC_RELATIVE
);
5788 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5789 got
, off
, 0, false);
5794 case elfcpp::R_PPC64_TOC16
:
5795 case elfcpp::R_PPC64_TOC16_LO
:
5796 case elfcpp::R_PPC64_TOC16_HI
:
5797 case elfcpp::R_PPC64_TOC16_HA
:
5798 case elfcpp::R_PPC64_TOC16_DS
:
5799 case elfcpp::R_PPC64_TOC16_LO_DS
:
5800 // We need a GOT section.
5801 target
->got_section(symtab
, layout
);
5804 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5805 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5806 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5807 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5809 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5810 if (tls_type
== tls::TLSOPT_NONE
)
5812 Output_data_got_powerpc
<size
, big_endian
>* got
5813 = target
->got_section(symtab
, layout
);
5814 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5815 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5816 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5817 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5819 else if (tls_type
== tls::TLSOPT_TO_LE
)
5821 // no GOT relocs needed for Local Exec.
5828 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5829 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5830 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5831 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5833 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5834 if (tls_type
== tls::TLSOPT_NONE
)
5835 target
->tlsld_got_offset(symtab
, layout
, object
);
5836 else if (tls_type
== tls::TLSOPT_TO_LE
)
5838 // no GOT relocs needed for Local Exec.
5839 if (parameters
->options().emit_relocs())
5841 Output_section
* os
= layout
->tls_segment()->first_section();
5842 gold_assert(os
!= NULL
);
5843 os
->set_needs_symtab_index();
5851 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5852 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5853 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5854 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5856 Output_data_got_powerpc
<size
, big_endian
>* got
5857 = target
->got_section(symtab
, layout
);
5858 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5859 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5863 case elfcpp::R_POWERPC_GOT_TPREL16
:
5864 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5865 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5866 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5868 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5869 if (tls_type
== tls::TLSOPT_NONE
)
5871 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5872 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5874 Output_data_got_powerpc
<size
, big_endian
>* got
5875 = target
->got_section(symtab
, layout
);
5876 unsigned int off
= got
->add_constant(0);
5877 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5879 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5880 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5881 elfcpp::R_POWERPC_TPREL
,
5885 else if (tls_type
== tls::TLSOPT_TO_LE
)
5887 // no GOT relocs needed for Local Exec.
5895 unsupported_reloc_local(object
, r_type
);
5901 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5902 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5903 case elfcpp::R_POWERPC_GOT_TPREL16
:
5904 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5905 case elfcpp::R_POWERPC_GOT16
:
5906 case elfcpp::R_PPC64_GOT16_DS
:
5907 case elfcpp::R_PPC64_TOC16
:
5908 case elfcpp::R_PPC64_TOC16_DS
:
5909 ppc_object
->set_has_small_toc_reloc();
5915 // Report an unsupported relocation against a global symbol.
5917 template<int size
, bool big_endian
>
5919 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5920 Sized_relobj_file
<size
, big_endian
>* object
,
5921 unsigned int r_type
,
5924 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5925 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5928 // Scan a relocation for a global symbol.
5930 template<int size
, bool big_endian
>
5932 Target_powerpc
<size
, big_endian
>::Scan::global(
5933 Symbol_table
* symtab
,
5935 Target_powerpc
<size
, big_endian
>* target
,
5936 Sized_relobj_file
<size
, big_endian
>* object
,
5937 unsigned int data_shndx
,
5938 Output_section
* output_section
,
5939 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5940 unsigned int r_type
,
5943 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5946 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5947 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5949 this->expect_tls_get_addr_call();
5950 const bool final
= gsym
->final_value_is_known();
5951 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5952 if (tls_type
!= tls::TLSOPT_NONE
)
5953 this->skip_next_tls_get_addr_call();
5955 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5956 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5958 this->expect_tls_get_addr_call();
5959 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5960 if (tls_type
!= tls::TLSOPT_NONE
)
5961 this->skip_next_tls_get_addr_call();
5964 Powerpc_relobj
<size
, big_endian
>* ppc_object
5965 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5967 // A STT_GNU_IFUNC symbol may require a PLT entry.
5968 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5969 bool pushed_ifunc
= false;
5970 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5972 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5973 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5974 reloc
.get_r_addend());
5975 target
->make_plt_entry(symtab
, layout
, gsym
);
5976 pushed_ifunc
= true;
5981 case elfcpp::R_POWERPC_NONE
:
5982 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5983 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5984 case elfcpp::R_PPC_LOCAL24PC
:
5985 case elfcpp::R_POWERPC_TLS
:
5986 case elfcpp::R_PPC64_ENTRY
:
5989 case elfcpp::R_PPC64_TOC
:
5991 Output_data_got_powerpc
<size
, big_endian
>* got
5992 = target
->got_section(symtab
, layout
);
5993 if (parameters
->options().output_is_position_independent())
5995 Address off
= reloc
.get_r_offset();
5997 && data_shndx
== ppc_object
->opd_shndx()
5998 && ppc_object
->get_opd_discard(off
- 8))
6001 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6002 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6003 if (data_shndx
!= ppc_object
->opd_shndx())
6004 symobj
= static_cast
6005 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6006 rela_dyn
->add_output_section_relative(got
->output_section(),
6007 elfcpp::R_POWERPC_RELATIVE
,
6009 object
, data_shndx
, off
,
6010 symobj
->toc_base_offset());
6015 case elfcpp::R_PPC64_ADDR64
:
6017 && target
->abiversion() < 2
6018 && data_shndx
== ppc_object
->opd_shndx()
6019 && (gsym
->is_defined_in_discarded_section()
6020 || gsym
->object() != object
))
6022 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6026 case elfcpp::R_PPC64_UADDR64
:
6027 case elfcpp::R_POWERPC_ADDR32
:
6028 case elfcpp::R_POWERPC_UADDR32
:
6029 case elfcpp::R_POWERPC_ADDR24
:
6030 case elfcpp::R_POWERPC_ADDR16
:
6031 case elfcpp::R_POWERPC_ADDR16_LO
:
6032 case elfcpp::R_POWERPC_ADDR16_HI
:
6033 case elfcpp::R_POWERPC_ADDR16_HA
:
6034 case elfcpp::R_POWERPC_UADDR16
:
6035 case elfcpp::R_PPC64_ADDR16_HIGH
:
6036 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6037 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6038 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6039 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6040 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6041 case elfcpp::R_PPC64_ADDR16_DS
:
6042 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6043 case elfcpp::R_POWERPC_ADDR14
:
6044 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6045 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6047 // Make a PLT entry if necessary.
6048 if (gsym
->needs_plt_entry())
6050 // Since this is not a PC-relative relocation, we may be
6051 // taking the address of a function. In that case we need to
6052 // set the entry in the dynamic symbol table to the address of
6053 // the PLT call stub.
6054 bool need_ifunc_plt
= false;
6055 if ((size
== 32 || target
->abiversion() >= 2)
6056 && gsym
->is_from_dynobj()
6057 && !parameters
->options().output_is_position_independent())
6059 gsym
->set_needs_dynsym_value();
6060 need_ifunc_plt
= true;
6062 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6064 target
->push_branch(ppc_object
, data_shndx
,
6065 reloc
.get_r_offset(), r_type
,
6066 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6067 reloc
.get_r_addend());
6068 target
->make_plt_entry(symtab
, layout
, gsym
);
6071 // Make a dynamic relocation if necessary.
6072 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6073 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6075 if (!parameters
->options().output_is_position_independent()
6076 && gsym
->may_need_copy_reloc())
6078 target
->copy_reloc(symtab
, layout
, object
,
6079 data_shndx
, output_section
, gsym
, reloc
);
6081 else if ((((size
== 32
6082 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6084 && r_type
== elfcpp::R_PPC64_ADDR64
6085 && target
->abiversion() >= 2))
6086 && gsym
->can_use_relative_reloc(false)
6087 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6088 && parameters
->options().shared()))
6090 && r_type
== elfcpp::R_PPC64_ADDR64
6091 && target
->abiversion() < 2
6092 && (gsym
->can_use_relative_reloc(false)
6093 || data_shndx
== ppc_object
->opd_shndx())))
6095 Reloc_section
* rela_dyn
6096 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6097 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6098 : elfcpp::R_POWERPC_RELATIVE
);
6099 rela_dyn
->add_symbolless_global_addend(
6100 gsym
, dynrel
, output_section
, object
, data_shndx
,
6101 reloc
.get_r_offset(), reloc
.get_r_addend());
6105 Reloc_section
* rela_dyn
6106 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6107 check_non_pic(object
, r_type
);
6108 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6110 reloc
.get_r_offset(),
6111 reloc
.get_r_addend());
6117 case elfcpp::R_PPC_PLTREL24
:
6118 case elfcpp::R_POWERPC_REL24
:
6121 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6123 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6124 reloc
.get_r_addend());
6125 if (gsym
->needs_plt_entry()
6126 || (!gsym
->final_value_is_known()
6127 && (gsym
->is_undefined()
6128 || gsym
->is_from_dynobj()
6129 || gsym
->is_preemptible())))
6130 target
->make_plt_entry(symtab
, layout
, gsym
);
6134 case elfcpp::R_PPC64_REL64
:
6135 case elfcpp::R_POWERPC_REL32
:
6136 // Make a dynamic relocation if necessary.
6137 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6139 if (!parameters
->options().output_is_position_independent()
6140 && gsym
->may_need_copy_reloc())
6142 target
->copy_reloc(symtab
, layout
, object
,
6143 data_shndx
, output_section
, gsym
,
6148 Reloc_section
* rela_dyn
6149 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6150 check_non_pic(object
, r_type
);
6151 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6152 data_shndx
, reloc
.get_r_offset(),
6153 reloc
.get_r_addend());
6158 case elfcpp::R_POWERPC_REL14
:
6159 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6160 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6162 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6163 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6164 reloc
.get_r_addend());
6167 case elfcpp::R_POWERPC_REL16
:
6168 case elfcpp::R_POWERPC_REL16_LO
:
6169 case elfcpp::R_POWERPC_REL16_HI
:
6170 case elfcpp::R_POWERPC_REL16_HA
:
6171 case elfcpp::R_POWERPC_REL16DX_HA
:
6172 case elfcpp::R_POWERPC_SECTOFF
:
6173 case elfcpp::R_POWERPC_SECTOFF_LO
:
6174 case elfcpp::R_POWERPC_SECTOFF_HI
:
6175 case elfcpp::R_POWERPC_SECTOFF_HA
:
6176 case elfcpp::R_PPC64_SECTOFF_DS
:
6177 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6178 case elfcpp::R_POWERPC_TPREL16
:
6179 case elfcpp::R_POWERPC_TPREL16_LO
:
6180 case elfcpp::R_POWERPC_TPREL16_HI
:
6181 case elfcpp::R_POWERPC_TPREL16_HA
:
6182 case elfcpp::R_PPC64_TPREL16_DS
:
6183 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6184 case elfcpp::R_PPC64_TPREL16_HIGH
:
6185 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6186 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6187 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6188 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6189 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6190 case elfcpp::R_POWERPC_DTPREL16
:
6191 case elfcpp::R_POWERPC_DTPREL16_LO
:
6192 case elfcpp::R_POWERPC_DTPREL16_HI
:
6193 case elfcpp::R_POWERPC_DTPREL16_HA
:
6194 case elfcpp::R_PPC64_DTPREL16_DS
:
6195 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6196 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6197 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6198 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6199 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6200 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6201 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6202 case elfcpp::R_PPC64_TLSGD
:
6203 case elfcpp::R_PPC64_TLSLD
:
6204 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6207 case elfcpp::R_POWERPC_GOT16
:
6208 case elfcpp::R_POWERPC_GOT16_LO
:
6209 case elfcpp::R_POWERPC_GOT16_HI
:
6210 case elfcpp::R_POWERPC_GOT16_HA
:
6211 case elfcpp::R_PPC64_GOT16_DS
:
6212 case elfcpp::R_PPC64_GOT16_LO_DS
:
6214 // The symbol requires a GOT entry.
6215 Output_data_got_powerpc
<size
, big_endian
>* got
;
6217 got
= target
->got_section(symtab
, layout
);
6218 if (gsym
->final_value_is_known())
6221 && (size
== 32 || target
->abiversion() >= 2))
6222 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6224 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6226 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6228 // If we are generating a shared object or a pie, this
6229 // symbol's GOT entry will be set by a dynamic relocation.
6230 unsigned int off
= got
->add_constant(0);
6231 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6233 Reloc_section
* rela_dyn
6234 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6236 if (gsym
->can_use_relative_reloc(false)
6238 || target
->abiversion() >= 2)
6239 && gsym
->visibility() == elfcpp::STV_PROTECTED
6240 && parameters
->options().shared()))
6242 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6243 : elfcpp::R_POWERPC_RELATIVE
);
6244 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6248 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6249 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6255 case elfcpp::R_PPC64_TOC16
:
6256 case elfcpp::R_PPC64_TOC16_LO
:
6257 case elfcpp::R_PPC64_TOC16_HI
:
6258 case elfcpp::R_PPC64_TOC16_HA
:
6259 case elfcpp::R_PPC64_TOC16_DS
:
6260 case elfcpp::R_PPC64_TOC16_LO_DS
:
6261 // We need a GOT section.
6262 target
->got_section(symtab
, layout
);
6265 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6266 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6267 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6268 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6270 const bool final
= gsym
->final_value_is_known();
6271 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6272 if (tls_type
== tls::TLSOPT_NONE
)
6274 Output_data_got_powerpc
<size
, big_endian
>* got
6275 = target
->got_section(symtab
, layout
);
6276 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6277 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6278 elfcpp::R_POWERPC_DTPMOD
,
6279 elfcpp::R_POWERPC_DTPREL
);
6281 else if (tls_type
== tls::TLSOPT_TO_IE
)
6283 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6285 Output_data_got_powerpc
<size
, big_endian
>* got
6286 = target
->got_section(symtab
, layout
);
6287 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6288 if (gsym
->is_undefined()
6289 || gsym
->is_from_dynobj())
6291 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6292 elfcpp::R_POWERPC_TPREL
);
6296 unsigned int off
= got
->add_constant(0);
6297 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6298 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6299 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6304 else if (tls_type
== tls::TLSOPT_TO_LE
)
6306 // no GOT relocs needed for Local Exec.
6313 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6314 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6315 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6316 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6318 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6319 if (tls_type
== tls::TLSOPT_NONE
)
6320 target
->tlsld_got_offset(symtab
, layout
, object
);
6321 else if (tls_type
== tls::TLSOPT_TO_LE
)
6323 // no GOT relocs needed for Local Exec.
6324 if (parameters
->options().emit_relocs())
6326 Output_section
* os
= layout
->tls_segment()->first_section();
6327 gold_assert(os
!= NULL
);
6328 os
->set_needs_symtab_index();
6336 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6337 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6338 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6339 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6341 Output_data_got_powerpc
<size
, big_endian
>* got
6342 = target
->got_section(symtab
, layout
);
6343 if (!gsym
->final_value_is_known()
6344 && (gsym
->is_from_dynobj()
6345 || gsym
->is_undefined()
6346 || gsym
->is_preemptible()))
6347 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6348 target
->rela_dyn_section(layout
),
6349 elfcpp::R_POWERPC_DTPREL
);
6351 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6355 case elfcpp::R_POWERPC_GOT_TPREL16
:
6356 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6357 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6358 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6360 const bool final
= gsym
->final_value_is_known();
6361 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6362 if (tls_type
== tls::TLSOPT_NONE
)
6364 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6366 Output_data_got_powerpc
<size
, big_endian
>* got
6367 = target
->got_section(symtab
, layout
);
6368 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6369 if (gsym
->is_undefined()
6370 || gsym
->is_from_dynobj())
6372 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6373 elfcpp::R_POWERPC_TPREL
);
6377 unsigned int off
= got
->add_constant(0);
6378 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6379 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6380 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6385 else if (tls_type
== tls::TLSOPT_TO_LE
)
6387 // no GOT relocs needed for Local Exec.
6395 unsupported_reloc_global(object
, r_type
, gsym
);
6401 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6402 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6403 case elfcpp::R_POWERPC_GOT_TPREL16
:
6404 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6405 case elfcpp::R_POWERPC_GOT16
:
6406 case elfcpp::R_PPC64_GOT16_DS
:
6407 case elfcpp::R_PPC64_TOC16
:
6408 case elfcpp::R_PPC64_TOC16_DS
:
6409 ppc_object
->set_has_small_toc_reloc();
6415 // Process relocations for gc.
6417 template<int size
, bool big_endian
>
6419 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6420 Symbol_table
* symtab
,
6422 Sized_relobj_file
<size
, big_endian
>* object
,
6423 unsigned int data_shndx
,
6425 const unsigned char* prelocs
,
6427 Output_section
* output_section
,
6428 bool needs_special_offset_handling
,
6429 size_t local_symbol_count
,
6430 const unsigned char* plocal_symbols
)
6432 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6433 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6434 Powerpc_relobj
<size
, big_endian
>* ppc_object
6435 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6437 ppc_object
->set_opd_valid();
6438 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6440 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6441 for (p
= ppc_object
->access_from_map()->begin();
6442 p
!= ppc_object
->access_from_map()->end();
6445 Address dst_off
= p
->first
;
6446 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6447 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6448 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6450 Relobj
* src_obj
= s
->first
;
6451 unsigned int src_indx
= s
->second
;
6452 symtab
->gc()->add_reference(src_obj
, src_indx
,
6453 ppc_object
, dst_indx
);
6457 ppc_object
->access_from_map()->clear();
6458 ppc_object
->process_gc_mark(symtab
);
6459 // Don't look at .opd relocs as .opd will reference everything.
6463 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
6464 typename
Target_powerpc::Relocatable_size_for_reloc
>(
6473 needs_special_offset_handling
,
6478 // Handle target specific gc actions when adding a gc reference from
6479 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6480 // and DST_OFF. For powerpc64, this adds a referenc to the code
6481 // section of a function descriptor.
6483 template<int size
, bool big_endian
>
6485 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6486 Symbol_table
* symtab
,
6488 unsigned int src_shndx
,
6490 unsigned int dst_shndx
,
6491 Address dst_off
) const
6493 if (size
!= 64 || dst_obj
->is_dynamic())
6496 Powerpc_relobj
<size
, big_endian
>* ppc_object
6497 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6498 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6500 if (ppc_object
->opd_valid())
6502 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6503 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6507 // If we haven't run scan_opd_relocs, we must delay
6508 // processing this function descriptor reference.
6509 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6514 // Add any special sections for this symbol to the gc work list.
6515 // For powerpc64, this adds the code section of a function
6518 template<int size
, bool big_endian
>
6520 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6521 Symbol_table
* symtab
,
6526 Powerpc_relobj
<size
, big_endian
>* ppc_object
6527 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6529 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6530 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6532 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6533 Address dst_off
= gsym
->value();
6534 if (ppc_object
->opd_valid())
6536 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6537 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
6541 ppc_object
->add_gc_mark(dst_off
);
6546 // For a symbol location in .opd, set LOC to the location of the
6549 template<int size
, bool big_endian
>
6551 Target_powerpc
<size
, big_endian
>::do_function_location(
6552 Symbol_location
* loc
) const
6554 if (size
== 64 && loc
->shndx
!= 0)
6556 if (loc
->object
->is_dynamic())
6558 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6559 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6560 if (loc
->shndx
== ppc_object
->opd_shndx())
6563 Address off
= loc
->offset
- ppc_object
->opd_address();
6564 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6565 loc
->offset
= dest_off
;
6570 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6571 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6572 if (loc
->shndx
== ppc_object
->opd_shndx())
6575 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6576 loc
->offset
= dest_off
;
6582 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6583 // compiled with -fsplit-stack. The function calls non-split-stack
6584 // code. Change the function to ensure it has enough stack space to
6585 // call some random function.
6587 template<int size
, bool big_endian
>
6589 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
6592 section_offset_type fnoffset
,
6593 section_size_type fnsize
,
6594 const unsigned char* prelocs
,
6596 unsigned char* view
,
6597 section_size_type view_size
,
6599 std::string
* to
) const
6601 // 32-bit not supported.
6605 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
6606 prelocs
, reloc_count
, view
, view_size
,
6611 // The function always starts with
6612 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6613 // addis %r12,%r1,-allocate@ha
6614 // addi %r12,%r12,-allocate@l
6616 // but note that the addis or addi may be replaced with a nop
6618 unsigned char *entry
= view
+ fnoffset
;
6619 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6621 if ((insn
& 0xffff0000) == addis_2_12
)
6623 /* Skip ELFv2 global entry code. */
6625 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6628 unsigned char *pinsn
= entry
;
6630 const uint32_t ld_private_ss
= 0xe80d8fc0;
6631 if (insn
== ld_private_ss
)
6633 int32_t allocate
= 0;
6637 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
6638 if ((insn
& 0xffff0000) == addis_12_1
)
6639 allocate
+= (insn
& 0xffff) << 16;
6640 else if ((insn
& 0xffff0000) == addi_12_1
6641 || (insn
& 0xffff0000) == addi_12_12
)
6642 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
6643 else if (insn
!= nop
)
6646 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
6648 int extra
= parameters
->options().split_stack_adjust_size();
6650 if (allocate
>= 0 || extra
< 0)
6652 object
->error(_("split-stack stack size overflow at "
6653 "section %u offset %0zx"),
6654 shndx
, static_cast<size_t>(fnoffset
));
6658 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
6659 if (insn
!= addis_12_1
)
6661 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6663 insn
= addi_12_12
| (allocate
& 0xffff);
6664 if (insn
!= addi_12_12
)
6666 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6672 insn
= addi_12_1
| (allocate
& 0xffff);
6673 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6676 if (pinsn
!= entry
+ 12)
6677 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
6685 if (!object
->has_no_split_stack())
6686 object
->error(_("failed to match split-stack sequence at "
6687 "section %u offset %0zx"),
6688 shndx
, static_cast<size_t>(fnoffset
));
6692 // Scan relocations for a section.
6694 template<int size
, bool big_endian
>
6696 Target_powerpc
<size
, big_endian
>::scan_relocs(
6697 Symbol_table
* symtab
,
6699 Sized_relobj_file
<size
, big_endian
>* object
,
6700 unsigned int data_shndx
,
6701 unsigned int sh_type
,
6702 const unsigned char* prelocs
,
6704 Output_section
* output_section
,
6705 bool needs_special_offset_handling
,
6706 size_t local_symbol_count
,
6707 const unsigned char* plocal_symbols
)
6709 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6710 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6712 if (sh_type
== elfcpp::SHT_REL
)
6714 gold_error(_("%s: unsupported REL reloc section"),
6715 object
->name().c_str());
6719 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
6728 needs_special_offset_handling
,
6733 // Functor class for processing the global symbol table.
6734 // Removes symbols defined on discarded opd entries.
6736 template<bool big_endian
>
6737 class Global_symbol_visitor_opd
6740 Global_symbol_visitor_opd()
6744 operator()(Sized_symbol
<64>* sym
)
6746 if (sym
->has_symtab_index()
6747 || sym
->source() != Symbol::FROM_OBJECT
6748 || !sym
->in_real_elf())
6751 if (sym
->object()->is_dynamic())
6754 Powerpc_relobj
<64, big_endian
>* symobj
6755 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6756 if (symobj
->opd_shndx() == 0)
6760 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6761 if (shndx
== symobj
->opd_shndx()
6762 && symobj
->get_opd_discard(sym
->value()))
6764 sym
->set_undefined();
6765 sym
->set_visibility(elfcpp::STV_DEFAULT
);
6766 sym
->set_is_defined_in_discarded_section();
6767 sym
->set_symtab_index(-1U);
6772 template<int size
, bool big_endian
>
6774 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6776 Symbol_table
* symtab
)
6780 Output_data_save_res
<size
, big_endian
>* savres
6781 = new Output_data_save_res
<size
, big_endian
>(symtab
);
6782 this->savres_section_
= savres
;
6783 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6784 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6785 savres
, ORDER_TEXT
, false);
6789 // Sort linker created .got section first (for the header), then input
6790 // sections belonging to files using small model code.
6792 template<bool big_endian
>
6793 class Sort_toc_sections
6797 operator()(const Output_section::Input_section
& is1
,
6798 const Output_section::Input_section
& is2
) const
6800 if (!is1
.is_input_section() && is2
.is_input_section())
6803 = (is1
.is_input_section()
6804 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6805 ->has_small_toc_reloc()));
6807 = (is2
.is_input_section()
6808 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6809 ->has_small_toc_reloc()));
6810 return small1
&& !small2
;
6814 // Finalize the sections.
6816 template<int size
, bool big_endian
>
6818 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6820 const Input_objects
*,
6821 Symbol_table
* symtab
)
6823 if (parameters
->doing_static_link())
6825 // At least some versions of glibc elf-init.o have a strong
6826 // reference to __rela_iplt marker syms. A weak ref would be
6828 if (this->iplt_
!= NULL
)
6830 Reloc_section
* rel
= this->iplt_
->rel_plt();
6831 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6832 Symbol_table::PREDEFINED
, rel
, 0, 0,
6833 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6834 elfcpp::STV_HIDDEN
, 0, false, true);
6835 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6836 Symbol_table::PREDEFINED
, rel
, 0, 0,
6837 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6838 elfcpp::STV_HIDDEN
, 0, true, true);
6842 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6843 Symbol_table::PREDEFINED
, 0, 0,
6844 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6845 elfcpp::STV_HIDDEN
, 0, true, false);
6846 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6847 Symbol_table::PREDEFINED
, 0, 0,
6848 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6849 elfcpp::STV_HIDDEN
, 0, true, false);
6855 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6856 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6858 if (!parameters
->options().relocatable())
6860 this->define_save_restore_funcs(layout
, symtab
);
6862 // Annoyingly, we need to make these sections now whether or
6863 // not we need them. If we delay until do_relax then we
6864 // need to mess with the relaxation machinery checkpointing.
6865 this->got_section(symtab
, layout
);
6866 this->make_brlt_section(layout
);
6868 if (parameters
->options().toc_sort())
6870 Output_section
* os
= this->got_
->output_section();
6871 if (os
!= NULL
&& os
->input_sections().size() > 1)
6872 std::stable_sort(os
->input_sections().begin(),
6873 os
->input_sections().end(),
6874 Sort_toc_sections
<big_endian
>());
6879 // Fill in some more dynamic tags.
6880 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6883 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6885 : this->plt_
->rel_plt());
6886 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6887 this->rela_dyn_
, true, size
== 32);
6891 if (this->got_
!= NULL
)
6893 this->got_
->finalize_data_size();
6894 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6895 this->got_
, this->got_
->g_o_t());
6900 if (this->glink_
!= NULL
)
6902 this->glink_
->finalize_data_size();
6903 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6905 (this->glink_
->pltresolve_size
6911 // Emit any relocs we saved in an attempt to avoid generating COPY
6913 if (this->copy_relocs_
.any_saved_relocs())
6914 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6917 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6921 ok_lo_toc_insn(uint32_t insn
)
6923 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6924 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6925 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6926 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6927 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6928 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6929 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6930 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6931 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6932 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6933 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6934 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6935 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6936 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6937 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6939 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6940 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6941 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6944 // Return the value to use for a branch relocation.
6946 template<int size
, bool big_endian
>
6948 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6949 const Symbol_table
* symtab
,
6950 const Sized_symbol
<size
>* gsym
,
6951 Powerpc_relobj
<size
, big_endian
>* object
,
6953 unsigned int *dest_shndx
)
6955 if (size
== 32 || this->abiversion() >= 2)
6959 // If the symbol is defined in an opd section, ie. is a function
6960 // descriptor, use the function descriptor code entry address
6961 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6963 && gsym
->source() != Symbol::FROM_OBJECT
)
6966 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6967 unsigned int shndx
= symobj
->opd_shndx();
6970 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6971 if (opd_addr
== invalid_address
)
6973 opd_addr
+= symobj
->output_section_address(shndx
);
6974 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
6977 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
6978 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6981 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6982 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6983 *dest_shndx
= folded
.second
;
6985 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6986 if (sec_addr
== invalid_address
)
6989 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6990 *value
= sec_addr
+ sec_off
;
6995 // Perform a relocation.
6997 template<int size
, bool big_endian
>
6999 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
7000 const Relocate_info
<size
, big_endian
>* relinfo
,
7002 Target_powerpc
* target
,
7005 const unsigned char* preloc
,
7006 const Sized_symbol
<size
>* gsym
,
7007 const Symbol_value
<size
>* psymval
,
7008 unsigned char* view
,
7010 section_size_type view_size
)
7015 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
7016 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
7017 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7019 case Track_tls::NOT_EXPECTED
:
7020 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7021 _("__tls_get_addr call lacks marker reloc"));
7023 case Track_tls::EXPECTED
:
7024 // We have already complained.
7026 case Track_tls::SKIP
:
7028 case Track_tls::NORMAL
:
7032 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
7033 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
7034 typedef typename Reloc_types
<elfcpp::SHT_RELA
,
7035 size
, big_endian
>::Reloc Reltype
;
7036 // Offset from start of insn to d-field reloc.
7037 const int d_offset
= big_endian
? 2 : 0;
7039 Powerpc_relobj
<size
, big_endian
>* const object
7040 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7042 bool has_stub_value
= false;
7043 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7045 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7046 : object
->local_has_plt_offset(r_sym
))
7047 && (!psymval
->is_ifunc_symbol()
7048 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7052 && target
->abiversion() >= 2
7053 && !parameters
->options().output_is_position_independent()
7054 && !is_branch_reloc(r_type
))
7056 Address off
= target
->glink_section()->find_global_entry(gsym
);
7057 if (off
!= invalid_address
)
7059 value
= target
->glink_section()->global_entry_address() + off
;
7060 has_stub_value
= true;
7065 Stub_table
<size
, big_endian
>* stub_table
7066 = object
->stub_table(relinfo
->data_shndx
);
7067 if (stub_table
== NULL
)
7069 // This is a ref from a data section to an ifunc symbol.
7070 if (target
->stub_tables().size() != 0)
7071 stub_table
= target
->stub_tables()[0];
7073 if (stub_table
!= NULL
)
7077 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7078 rela
.get_r_addend());
7080 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7081 rela
.get_r_addend());
7082 if (off
!= invalid_address
)
7084 value
= stub_table
->stub_address() + off
;
7085 has_stub_value
= true;
7089 // We don't care too much about bogus debug references to
7090 // non-local functions, but otherwise there had better be a plt
7091 // call stub or global entry stub as appropriate.
7092 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7095 if (r_type
== elfcpp::R_POWERPC_GOT16
7096 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7097 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7098 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7099 || r_type
== elfcpp::R_PPC64_GOT16_DS
7100 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7104 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7105 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7109 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7110 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7111 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7113 value
-= target
->got_section()->got_base_offset(object
);
7115 else if (r_type
== elfcpp::R_PPC64_TOC
)
7117 value
= (target
->got_section()->output_section()->address()
7118 + object
->toc_base_offset());
7120 else if (gsym
!= NULL
7121 && (r_type
== elfcpp::R_POWERPC_REL24
7122 || r_type
== elfcpp::R_PPC_PLTREL24
)
7127 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7128 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7129 bool can_plt_call
= false;
7130 if (rela
.get_r_offset() + 8 <= view_size
)
7132 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7133 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7136 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7138 elfcpp::Swap
<32, big_endian
>::
7139 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7140 can_plt_call
= true;
7145 // If we don't have a branch and link followed by a nop,
7146 // we can't go via the plt because there is no place to
7147 // put a toc restoring instruction.
7148 // Unless we know we won't be returning.
7149 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7150 can_plt_call
= true;
7154 // g++ as of 20130507 emits self-calls without a
7155 // following nop. This is arguably wrong since we have
7156 // conflicting information. On the one hand a global
7157 // symbol and on the other a local call sequence, but
7158 // don't error for this special case.
7159 // It isn't possible to cheaply verify we have exactly
7160 // such a call. Allow all calls to the same section.
7162 Address code
= value
;
7163 if (gsym
->source() == Symbol::FROM_OBJECT
7164 && gsym
->object() == object
)
7166 unsigned int dest_shndx
= 0;
7167 if (target
->abiversion() < 2)
7169 Address addend
= rela
.get_r_addend();
7170 code
= psymval
->value(object
, addend
);
7171 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7172 &code
, &dest_shndx
);
7175 if (dest_shndx
== 0)
7176 dest_shndx
= gsym
->shndx(&is_ordinary
);
7177 ok
= dest_shndx
== relinfo
->data_shndx
;
7181 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7182 _("call lacks nop, can't restore toc; "
7183 "recompile with -fPIC"));
7189 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7190 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7191 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7192 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7194 // First instruction of a global dynamic sequence, arg setup insn.
7195 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7196 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7197 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7198 if (tls_type
== tls::TLSOPT_NONE
)
7199 got_type
= GOT_TYPE_TLSGD
;
7200 else if (tls_type
== tls::TLSOPT_TO_IE
)
7201 got_type
= GOT_TYPE_TPREL
;
7202 if (got_type
!= GOT_TYPE_STANDARD
)
7206 gold_assert(gsym
->has_got_offset(got_type
));
7207 value
= gsym
->got_offset(got_type
);
7211 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7212 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7213 value
= object
->local_got_offset(r_sym
, got_type
);
7215 value
-= target
->got_section()->got_base_offset(object
);
7217 if (tls_type
== tls::TLSOPT_TO_IE
)
7219 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7220 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7222 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7223 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7224 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7226 insn
|= 32 << 26; // lwz
7228 insn
|= 58 << 26; // ld
7229 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7231 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7232 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7234 else if (tls_type
== tls::TLSOPT_TO_LE
)
7236 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7237 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7239 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7240 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7241 insn
&= (1 << 26) - (1 << 21); // extract rt
7246 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7247 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7248 value
= psymval
->value(object
, rela
.get_r_addend());
7252 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7254 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7255 r_type
= elfcpp::R_POWERPC_NONE
;
7259 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7260 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7261 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7262 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7264 // First instruction of a local dynamic sequence, arg setup insn.
7265 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7266 if (tls_type
== tls::TLSOPT_NONE
)
7268 value
= target
->tlsld_got_offset();
7269 value
-= target
->got_section()->got_base_offset(object
);
7273 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7274 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7275 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7277 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7278 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7279 insn
&= (1 << 26) - (1 << 21); // extract rt
7284 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7285 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7290 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7292 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7293 r_type
= elfcpp::R_POWERPC_NONE
;
7297 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7298 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7299 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7300 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7302 // Accesses relative to a local dynamic sequence address,
7303 // no optimisation here.
7306 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7307 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7311 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7312 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7313 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7315 value
-= target
->got_section()->got_base_offset(object
);
7317 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7318 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7319 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7320 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7322 // First instruction of initial exec sequence.
7323 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7324 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7325 if (tls_type
== tls::TLSOPT_NONE
)
7329 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7330 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7334 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7335 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7336 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7338 value
-= target
->got_section()->got_base_offset(object
);
7342 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7343 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7344 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7346 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7347 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7348 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7353 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7354 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7355 value
= psymval
->value(object
, rela
.get_r_addend());
7359 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7361 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7362 r_type
= elfcpp::R_POWERPC_NONE
;
7366 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7367 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7369 // Second instruction of a global dynamic sequence,
7370 // the __tls_get_addr call
7371 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7372 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7373 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7374 if (tls_type
!= tls::TLSOPT_NONE
)
7376 if (tls_type
== tls::TLSOPT_TO_IE
)
7378 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7379 Insn insn
= add_3_3_13
;
7382 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7383 r_type
= elfcpp::R_POWERPC_NONE
;
7387 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7388 Insn insn
= addi_3_3
;
7389 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7390 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7392 value
= psymval
->value(object
, rela
.get_r_addend());
7394 this->skip_next_tls_get_addr_call();
7397 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7398 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7400 // Second instruction of a local dynamic sequence,
7401 // the __tls_get_addr call
7402 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7403 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7404 if (tls_type
== tls::TLSOPT_TO_LE
)
7406 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7407 Insn insn
= addi_3_3
;
7408 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7409 this->skip_next_tls_get_addr_call();
7410 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7415 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7417 // Second instruction of an initial exec sequence
7418 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7419 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7420 if (tls_type
== tls::TLSOPT_TO_LE
)
7422 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7423 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7424 unsigned int reg
= size
== 32 ? 2 : 13;
7425 insn
= at_tls_transform(insn
, reg
);
7426 gold_assert(insn
!= 0);
7427 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7428 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7430 value
= psymval
->value(object
, rela
.get_r_addend());
7433 else if (!has_stub_value
)
7436 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
7437 addend
= rela
.get_r_addend();
7438 value
= psymval
->value(object
, addend
);
7439 if (size
== 64 && is_branch_reloc(r_type
))
7441 if (target
->abiversion() >= 2)
7444 value
+= object
->ppc64_local_entry_offset(gsym
);
7446 value
+= object
->ppc64_local_entry_offset(r_sym
);
7450 unsigned int dest_shndx
;
7451 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7452 &value
, &dest_shndx
);
7455 Address max_branch_offset
= max_branch_delta(r_type
);
7456 if (max_branch_offset
!= 0
7457 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7459 Stub_table
<size
, big_endian
>* stub_table
7460 = object
->stub_table(relinfo
->data_shndx
);
7461 if (stub_table
!= NULL
)
7463 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7464 if (off
!= invalid_address
)
7466 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7468 has_stub_value
= true;
7476 case elfcpp::R_PPC64_REL64
:
7477 case elfcpp::R_POWERPC_REL32
:
7478 case elfcpp::R_POWERPC_REL24
:
7479 case elfcpp::R_PPC_PLTREL24
:
7480 case elfcpp::R_PPC_LOCAL24PC
:
7481 case elfcpp::R_POWERPC_REL16
:
7482 case elfcpp::R_POWERPC_REL16_LO
:
7483 case elfcpp::R_POWERPC_REL16_HI
:
7484 case elfcpp::R_POWERPC_REL16_HA
:
7485 case elfcpp::R_POWERPC_REL16DX_HA
:
7486 case elfcpp::R_POWERPC_REL14
:
7487 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7488 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7492 case elfcpp::R_PPC64_TOC16
:
7493 case elfcpp::R_PPC64_TOC16_LO
:
7494 case elfcpp::R_PPC64_TOC16_HI
:
7495 case elfcpp::R_PPC64_TOC16_HA
:
7496 case elfcpp::R_PPC64_TOC16_DS
:
7497 case elfcpp::R_PPC64_TOC16_LO_DS
:
7498 // Subtract the TOC base address.
7499 value
-= (target
->got_section()->output_section()->address()
7500 + object
->toc_base_offset());
7503 case elfcpp::R_POWERPC_SECTOFF
:
7504 case elfcpp::R_POWERPC_SECTOFF_LO
:
7505 case elfcpp::R_POWERPC_SECTOFF_HI
:
7506 case elfcpp::R_POWERPC_SECTOFF_HA
:
7507 case elfcpp::R_PPC64_SECTOFF_DS
:
7508 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7510 value
-= os
->address();
7513 case elfcpp::R_PPC64_TPREL16_DS
:
7514 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7515 case elfcpp::R_PPC64_TPREL16_HIGH
:
7516 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7518 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7520 case elfcpp::R_POWERPC_TPREL16
:
7521 case elfcpp::R_POWERPC_TPREL16_LO
:
7522 case elfcpp::R_POWERPC_TPREL16_HI
:
7523 case elfcpp::R_POWERPC_TPREL16_HA
:
7524 case elfcpp::R_POWERPC_TPREL
:
7525 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7526 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7527 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7528 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7529 // tls symbol values are relative to tls_segment()->vaddr()
7533 case elfcpp::R_PPC64_DTPREL16_DS
:
7534 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7535 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7536 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7537 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7538 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7540 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7541 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7543 case elfcpp::R_POWERPC_DTPREL16
:
7544 case elfcpp::R_POWERPC_DTPREL16_LO
:
7545 case elfcpp::R_POWERPC_DTPREL16_HI
:
7546 case elfcpp::R_POWERPC_DTPREL16_HA
:
7547 case elfcpp::R_POWERPC_DTPREL
:
7548 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7549 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7550 // tls symbol values are relative to tls_segment()->vaddr()
7551 value
-= dtp_offset
;
7554 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7556 value
+= object
->ppc64_local_entry_offset(gsym
);
7558 value
+= object
->ppc64_local_entry_offset(r_sym
);
7565 Insn branch_bit
= 0;
7568 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7569 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7570 branch_bit
= 1 << 21;
7571 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7572 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7574 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7575 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7578 if (this->is_isa_v2
)
7580 // Set 'a' bit. This is 0b00010 in BO field for branch
7581 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7582 // for branch on CTR insns (BO == 1a00t or 1a01t).
7583 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7585 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7592 // Invert 'y' bit if not the default.
7593 if (static_cast<Signed_address
>(value
) < 0)
7596 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7606 // Multi-instruction sequences that access the TOC can be
7607 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7608 // to nop; addi rb,r2,x;
7614 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7615 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7616 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7617 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7618 case elfcpp::R_POWERPC_GOT16_HA
:
7619 case elfcpp::R_PPC64_TOC16_HA
:
7620 if (parameters
->options().toc_optimize())
7622 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7623 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7624 if ((insn
& ((0x3f << 26) | 0x1f << 16))
7625 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7626 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7627 _("toc optimization is not supported "
7628 "for %#08x instruction"), insn
);
7629 else if (value
+ 0x8000 < 0x10000)
7631 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7637 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7638 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7639 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7640 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7641 case elfcpp::R_POWERPC_GOT16_LO
:
7642 case elfcpp::R_PPC64_GOT16_LO_DS
:
7643 case elfcpp::R_PPC64_TOC16_LO
:
7644 case elfcpp::R_PPC64_TOC16_LO_DS
:
7645 if (parameters
->options().toc_optimize())
7647 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7648 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7649 if (!ok_lo_toc_insn(insn
))
7650 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7651 _("toc optimization is not supported "
7652 "for %#08x instruction"), insn
);
7653 else if (value
+ 0x8000 < 0x10000)
7655 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7657 // Transform addic to addi when we change reg.
7658 insn
&= ~((0x3f << 26) | (0x1f << 16));
7659 insn
|= (14u << 26) | (2 << 16);
7663 insn
&= ~(0x1f << 16);
7666 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7671 case elfcpp::R_PPC64_ENTRY
:
7672 value
= (target
->got_section()->output_section()->address()
7673 + object
->toc_base_offset());
7674 if (value
+ 0x80008000 <= 0xffffffff
7675 && !parameters
->options().output_is_position_independent())
7677 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7678 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7679 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
7681 if ((insn1
& ~0xfffc) == ld_2_12
7682 && insn2
== add_2_2_12
)
7684 insn1
= lis_2
+ ha(value
);
7685 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
7686 insn2
= addi_2_2
+ l(value
);
7687 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
7694 if (value
+ 0x80008000 <= 0xffffffff)
7696 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7697 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7698 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
7700 if ((insn1
& ~0xfffc) == ld_2_12
7701 && insn2
== add_2_2_12
)
7703 insn1
= addis_2_12
+ ha(value
);
7704 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
7705 insn2
= addi_2_2
+ l(value
);
7706 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
7713 case elfcpp::R_POWERPC_REL16_LO
:
7714 // If we are generating a non-PIC executable, edit
7715 // 0: addis 2,12,.TOC.-0b@ha
7716 // addi 2,2,.TOC.-0b@l
7717 // used by ELFv2 global entry points to set up r2, to
7720 // if .TOC. is in range. */
7721 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
7724 && target
->abiversion() >= 2
7725 && !parameters
->options().output_is_position_independent()
7727 && strcmp(gsym
->name(), ".TOC.") == 0)
7729 const int reloc_size
7730 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
7731 Reltype
prev_rela(preloc
- reloc_size
);
7732 if ((prev_rela
.get_r_info()
7733 == elfcpp::elf_r_info
<size
>(r_sym
,
7734 elfcpp::R_POWERPC_REL16_HA
))
7735 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
7736 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
7738 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7739 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
7740 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7742 if ((insn1
& 0xffff0000) == addis_2_12
7743 && (insn2
& 0xffff0000) == addi_2_2
)
7745 insn1
= lis_2
+ ha(value
+ address
- 4);
7746 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
7747 insn2
= addi_2_2
+ l(value
+ address
- 4);
7748 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
7751 relinfo
->rr
->set_strategy(relnum
- 1,
7752 Relocatable_relocs::RELOC_SPECIAL
);
7753 relinfo
->rr
->set_strategy(relnum
,
7754 Relocatable_relocs::RELOC_SPECIAL
);
7764 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7765 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
7768 case elfcpp::R_POWERPC_ADDR32
:
7769 case elfcpp::R_POWERPC_UADDR32
:
7771 overflow
= Reloc::CHECK_BITFIELD
;
7774 case elfcpp::R_POWERPC_REL32
:
7775 case elfcpp::R_POWERPC_REL16DX_HA
:
7777 overflow
= Reloc::CHECK_SIGNED
;
7780 case elfcpp::R_POWERPC_UADDR16
:
7781 overflow
= Reloc::CHECK_BITFIELD
;
7784 case elfcpp::R_POWERPC_ADDR16
:
7785 // We really should have three separate relocations,
7786 // one for 16-bit data, one for insns with 16-bit signed fields,
7787 // and one for insns with 16-bit unsigned fields.
7788 overflow
= Reloc::CHECK_BITFIELD
;
7789 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
7790 overflow
= Reloc::CHECK_LOW_INSN
;
7793 case elfcpp::R_POWERPC_ADDR16_HI
:
7794 case elfcpp::R_POWERPC_ADDR16_HA
:
7795 case elfcpp::R_POWERPC_GOT16_HI
:
7796 case elfcpp::R_POWERPC_GOT16_HA
:
7797 case elfcpp::R_POWERPC_PLT16_HI
:
7798 case elfcpp::R_POWERPC_PLT16_HA
:
7799 case elfcpp::R_POWERPC_SECTOFF_HI
:
7800 case elfcpp::R_POWERPC_SECTOFF_HA
:
7801 case elfcpp::R_PPC64_TOC16_HI
:
7802 case elfcpp::R_PPC64_TOC16_HA
:
7803 case elfcpp::R_PPC64_PLTGOT16_HI
:
7804 case elfcpp::R_PPC64_PLTGOT16_HA
:
7805 case elfcpp::R_POWERPC_TPREL16_HI
:
7806 case elfcpp::R_POWERPC_TPREL16_HA
:
7807 case elfcpp::R_POWERPC_DTPREL16_HI
:
7808 case elfcpp::R_POWERPC_DTPREL16_HA
:
7809 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7810 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7811 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7812 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7813 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7814 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7815 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7816 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7817 case elfcpp::R_POWERPC_REL16_HI
:
7818 case elfcpp::R_POWERPC_REL16_HA
:
7820 overflow
= Reloc::CHECK_HIGH_INSN
;
7823 case elfcpp::R_POWERPC_REL16
:
7824 case elfcpp::R_PPC64_TOC16
:
7825 case elfcpp::R_POWERPC_GOT16
:
7826 case elfcpp::R_POWERPC_SECTOFF
:
7827 case elfcpp::R_POWERPC_TPREL16
:
7828 case elfcpp::R_POWERPC_DTPREL16
:
7829 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7830 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7831 case elfcpp::R_POWERPC_GOT_TPREL16
:
7832 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7833 overflow
= Reloc::CHECK_LOW_INSN
;
7836 case elfcpp::R_POWERPC_ADDR24
:
7837 case elfcpp::R_POWERPC_ADDR14
:
7838 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7839 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7840 case elfcpp::R_PPC64_ADDR16_DS
:
7841 case elfcpp::R_POWERPC_REL24
:
7842 case elfcpp::R_PPC_PLTREL24
:
7843 case elfcpp::R_PPC_LOCAL24PC
:
7844 case elfcpp::R_PPC64_TPREL16_DS
:
7845 case elfcpp::R_PPC64_DTPREL16_DS
:
7846 case elfcpp::R_PPC64_TOC16_DS
:
7847 case elfcpp::R_PPC64_GOT16_DS
:
7848 case elfcpp::R_PPC64_SECTOFF_DS
:
7849 case elfcpp::R_POWERPC_REL14
:
7850 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7851 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7852 overflow
= Reloc::CHECK_SIGNED
;
7856 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7859 if (overflow
== Reloc::CHECK_LOW_INSN
7860 || overflow
== Reloc::CHECK_HIGH_INSN
)
7862 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7864 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
7865 overflow
= Reloc::CHECK_BITFIELD
;
7866 else if (overflow
== Reloc::CHECK_LOW_INSN
7867 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
7868 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
7869 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
7870 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
7871 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
7872 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
7873 overflow
= Reloc::CHECK_UNSIGNED
;
7875 overflow
= Reloc::CHECK_SIGNED
;
7878 bool maybe_dq_reloc
= false;
7879 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7880 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7883 case elfcpp::R_POWERPC_NONE
:
7884 case elfcpp::R_POWERPC_TLS
:
7885 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7886 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7889 case elfcpp::R_PPC64_ADDR64
:
7890 case elfcpp::R_PPC64_REL64
:
7891 case elfcpp::R_PPC64_TOC
:
7892 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7893 Reloc::addr64(view
, value
);
7896 case elfcpp::R_POWERPC_TPREL
:
7897 case elfcpp::R_POWERPC_DTPREL
:
7899 Reloc::addr64(view
, value
);
7901 status
= Reloc::addr32(view
, value
, overflow
);
7904 case elfcpp::R_PPC64_UADDR64
:
7905 Reloc::addr64_u(view
, value
);
7908 case elfcpp::R_POWERPC_ADDR32
:
7909 status
= Reloc::addr32(view
, value
, overflow
);
7912 case elfcpp::R_POWERPC_REL32
:
7913 case elfcpp::R_POWERPC_UADDR32
:
7914 status
= Reloc::addr32_u(view
, value
, overflow
);
7917 case elfcpp::R_POWERPC_ADDR24
:
7918 case elfcpp::R_POWERPC_REL24
:
7919 case elfcpp::R_PPC_PLTREL24
:
7920 case elfcpp::R_PPC_LOCAL24PC
:
7921 status
= Reloc::addr24(view
, value
, overflow
);
7924 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7925 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7926 case elfcpp::R_POWERPC_GOT_TPREL16
:
7927 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7930 // On ppc64 these are all ds form
7931 maybe_dq_reloc
= true;
7934 case elfcpp::R_POWERPC_ADDR16
:
7935 case elfcpp::R_POWERPC_REL16
:
7936 case elfcpp::R_PPC64_TOC16
:
7937 case elfcpp::R_POWERPC_GOT16
:
7938 case elfcpp::R_POWERPC_SECTOFF
:
7939 case elfcpp::R_POWERPC_TPREL16
:
7940 case elfcpp::R_POWERPC_DTPREL16
:
7941 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7942 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7943 case elfcpp::R_POWERPC_ADDR16_LO
:
7944 case elfcpp::R_POWERPC_REL16_LO
:
7945 case elfcpp::R_PPC64_TOC16_LO
:
7946 case elfcpp::R_POWERPC_GOT16_LO
:
7947 case elfcpp::R_POWERPC_SECTOFF_LO
:
7948 case elfcpp::R_POWERPC_TPREL16_LO
:
7949 case elfcpp::R_POWERPC_DTPREL16_LO
:
7950 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7951 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7953 status
= Reloc::addr16(view
, value
, overflow
);
7955 maybe_dq_reloc
= true;
7958 case elfcpp::R_POWERPC_UADDR16
:
7959 status
= Reloc::addr16_u(view
, value
, overflow
);
7962 case elfcpp::R_PPC64_ADDR16_HIGH
:
7963 case elfcpp::R_PPC64_TPREL16_HIGH
:
7964 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7966 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7968 case elfcpp::R_POWERPC_ADDR16_HI
:
7969 case elfcpp::R_POWERPC_REL16_HI
:
7970 case elfcpp::R_PPC64_TOC16_HI
:
7971 case elfcpp::R_POWERPC_GOT16_HI
:
7972 case elfcpp::R_POWERPC_SECTOFF_HI
:
7973 case elfcpp::R_POWERPC_TPREL16_HI
:
7974 case elfcpp::R_POWERPC_DTPREL16_HI
:
7975 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7976 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7977 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7978 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7979 Reloc::addr16_hi(view
, value
);
7982 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7983 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7984 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7986 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7988 case elfcpp::R_POWERPC_ADDR16_HA
:
7989 case elfcpp::R_POWERPC_REL16_HA
:
7990 case elfcpp::R_PPC64_TOC16_HA
:
7991 case elfcpp::R_POWERPC_GOT16_HA
:
7992 case elfcpp::R_POWERPC_SECTOFF_HA
:
7993 case elfcpp::R_POWERPC_TPREL16_HA
:
7994 case elfcpp::R_POWERPC_DTPREL16_HA
:
7995 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7996 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7997 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7998 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7999 Reloc::addr16_ha(view
, value
);
8002 case elfcpp::R_POWERPC_REL16DX_HA
:
8003 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
8006 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8008 // R_PPC_EMB_NADDR16_LO
8010 case elfcpp::R_PPC64_ADDR16_HIGHER
:
8011 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8012 Reloc::addr16_hi2(view
, value
);
8015 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8017 // R_PPC_EMB_NADDR16_HI
8019 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
8020 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8021 Reloc::addr16_ha2(view
, value
);
8024 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8026 // R_PPC_EMB_NADDR16_HA
8028 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
8029 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8030 Reloc::addr16_hi3(view
, value
);
8033 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8037 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
8038 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8039 Reloc::addr16_ha3(view
, value
);
8042 case elfcpp::R_PPC64_DTPREL16_DS
:
8043 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8045 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
8047 case elfcpp::R_PPC64_TPREL16_DS
:
8048 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8050 // R_PPC_TLSGD, R_PPC_TLSLD
8052 case elfcpp::R_PPC64_ADDR16_DS
:
8053 case elfcpp::R_PPC64_ADDR16_LO_DS
:
8054 case elfcpp::R_PPC64_TOC16_DS
:
8055 case elfcpp::R_PPC64_TOC16_LO_DS
:
8056 case elfcpp::R_PPC64_GOT16_DS
:
8057 case elfcpp::R_PPC64_GOT16_LO_DS
:
8058 case elfcpp::R_PPC64_SECTOFF_DS
:
8059 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8060 maybe_dq_reloc
= true;
8063 case elfcpp::R_POWERPC_ADDR14
:
8064 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8065 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8066 case elfcpp::R_POWERPC_REL14
:
8067 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8068 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8069 status
= Reloc::addr14(view
, value
, overflow
);
8072 case elfcpp::R_POWERPC_COPY
:
8073 case elfcpp::R_POWERPC_GLOB_DAT
:
8074 case elfcpp::R_POWERPC_JMP_SLOT
:
8075 case elfcpp::R_POWERPC_RELATIVE
:
8076 case elfcpp::R_POWERPC_DTPMOD
:
8077 case elfcpp::R_PPC64_JMP_IREL
:
8078 case elfcpp::R_POWERPC_IRELATIVE
:
8079 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8080 _("unexpected reloc %u in object file"),
8084 case elfcpp::R_PPC_EMB_SDA21
:
8089 // R_PPC64_TOCSAVE. For the time being this can be ignored.
8093 case elfcpp::R_PPC_EMB_SDA2I16
:
8094 case elfcpp::R_PPC_EMB_SDA2REL
:
8097 // R_PPC64_TLSGD, R_PPC64_TLSLD
8100 case elfcpp::R_POWERPC_PLT32
:
8101 case elfcpp::R_POWERPC_PLTREL32
:
8102 case elfcpp::R_POWERPC_PLT16_LO
:
8103 case elfcpp::R_POWERPC_PLT16_HI
:
8104 case elfcpp::R_POWERPC_PLT16_HA
:
8105 case elfcpp::R_PPC_SDAREL16
:
8106 case elfcpp::R_POWERPC_ADDR30
:
8107 case elfcpp::R_PPC64_PLT64
:
8108 case elfcpp::R_PPC64_PLTREL64
:
8109 case elfcpp::R_PPC64_PLTGOT16
:
8110 case elfcpp::R_PPC64_PLTGOT16_LO
:
8111 case elfcpp::R_PPC64_PLTGOT16_HI
:
8112 case elfcpp::R_PPC64_PLTGOT16_HA
:
8113 case elfcpp::R_PPC64_PLT16_LO_DS
:
8114 case elfcpp::R_PPC64_PLTGOT16_DS
:
8115 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
8116 case elfcpp::R_PPC_EMB_RELSDA
:
8117 case elfcpp::R_PPC_TOC16
:
8120 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8121 _("unsupported reloc %u"),
8129 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8131 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
8132 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8133 && (insn
& 3) == 1))
8134 status
= Reloc::addr16_dq(view
, value
, overflow
);
8136 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8137 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8138 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
8139 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
8140 status
= Reloc::addr16_ds(view
, value
, overflow
);
8142 status
= Reloc::addr16(view
, value
, overflow
);
8145 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
8148 && gsym
->is_undefined()
8149 && is_branch_reloc(r_type
))))
8151 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8152 _("relocation overflow"));
8154 gold_info(_("try relinking with a smaller --stub-group-size"));
8160 // Relocate section data.
8162 template<int size
, bool big_endian
>
8164 Target_powerpc
<size
, big_endian
>::relocate_section(
8165 const Relocate_info
<size
, big_endian
>* relinfo
,
8166 unsigned int sh_type
,
8167 const unsigned char* prelocs
,
8169 Output_section
* output_section
,
8170 bool needs_special_offset_handling
,
8171 unsigned char* view
,
8173 section_size_type view_size
,
8174 const Reloc_symbol_changes
* reloc_symbol_changes
)
8176 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8177 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8178 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8179 Powerpc_comdat_behavior
;
8181 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8183 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
8184 Powerpc_relocate
, Powerpc_comdat_behavior
>(
8190 needs_special_offset_handling
,
8194 reloc_symbol_changes
);
8197 class Powerpc_scan_relocatable_reloc
8200 // Return the strategy to use for a local symbol which is not a
8201 // section symbol, given the relocation type.
8202 inline Relocatable_relocs::Reloc_strategy
8203 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8205 if (r_type
== 0 && r_sym
== 0)
8206 return Relocatable_relocs::RELOC_DISCARD
;
8207 return Relocatable_relocs::RELOC_COPY
;
8210 // Return the strategy to use for a local symbol which is a section
8211 // symbol, given the relocation type.
8212 inline Relocatable_relocs::Reloc_strategy
8213 local_section_strategy(unsigned int, Relobj
*)
8215 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8218 // Return the strategy to use for a global symbol, given the
8219 // relocation type, the object, and the symbol index.
8220 inline Relocatable_relocs::Reloc_strategy
8221 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8223 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8224 return Relocatable_relocs::RELOC_SPECIAL
;
8225 return Relocatable_relocs::RELOC_COPY
;
8229 // Scan the relocs during a relocatable link.
8231 template<int size
, bool big_endian
>
8233 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8234 Symbol_table
* symtab
,
8236 Sized_relobj_file
<size
, big_endian
>* object
,
8237 unsigned int data_shndx
,
8238 unsigned int sh_type
,
8239 const unsigned char* prelocs
,
8241 Output_section
* output_section
,
8242 bool needs_special_offset_handling
,
8243 size_t local_symbol_count
,
8244 const unsigned char* plocal_symbols
,
8245 Relocatable_relocs
* rr
)
8247 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8249 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
8250 Powerpc_scan_relocatable_reloc
>(
8258 needs_special_offset_handling
,
8264 // Emit relocations for a section.
8265 // This is a modified version of the function by the same name in
8266 // target-reloc.h. Using relocate_special_relocatable for
8267 // R_PPC_PLTREL24 would require duplication of the entire body of the
8268 // loop, so we may as well duplicate the whole thing.
8270 template<int size
, bool big_endian
>
8272 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8273 const Relocate_info
<size
, big_endian
>* relinfo
,
8274 unsigned int sh_type
,
8275 const unsigned char* prelocs
,
8277 Output_section
* output_section
,
8278 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8280 Address view_address
,
8282 unsigned char* reloc_view
,
8283 section_size_type reloc_view_size
)
8285 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8287 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8289 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
8291 const int reloc_size
8292 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8293 // Offset from start of insn to d-field reloc.
8294 const int d_offset
= big_endian
? 2 : 0;
8296 Powerpc_relobj
<size
, big_endian
>* const object
8297 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8298 const unsigned int local_count
= object
->local_symbol_count();
8299 unsigned int got2_shndx
= object
->got2_shndx();
8300 Address got2_addend
= 0;
8301 if (got2_shndx
!= 0)
8303 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8304 gold_assert(got2_addend
!= invalid_address
);
8307 unsigned char* pwrite
= reloc_view
;
8308 bool zap_next
= false;
8309 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8311 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
8312 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8315 Reltype
reloc(prelocs
);
8316 Reltype_write
reloc_write(pwrite
);
8318 Address offset
= reloc
.get_r_offset();
8319 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8320 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8321 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8322 const unsigned int orig_r_sym
= r_sym
;
8323 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8324 = reloc
.get_r_addend();
8325 const Symbol
* gsym
= NULL
;
8329 // We could arrange to discard these and other relocs for
8330 // tls optimised sequences in the strategy methods, but for
8331 // now do as BFD ld does.
8332 r_type
= elfcpp::R_POWERPC_NONE
;
8336 // Get the new symbol index.
8337 Output_section
* os
= NULL
;
8338 if (r_sym
< local_count
)
8342 case Relocatable_relocs::RELOC_COPY
:
8343 case Relocatable_relocs::RELOC_SPECIAL
:
8346 r_sym
= object
->symtab_index(r_sym
);
8347 gold_assert(r_sym
!= -1U);
8351 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
8353 // We are adjusting a section symbol. We need to find
8354 // the symbol table index of the section symbol for
8355 // the output section corresponding to input section
8356 // in which this symbol is defined.
8357 gold_assert(r_sym
< local_count
);
8359 unsigned int shndx
=
8360 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8361 gold_assert(is_ordinary
);
8362 os
= object
->output_section(shndx
);
8363 gold_assert(os
!= NULL
);
8364 gold_assert(os
->needs_symtab_index());
8365 r_sym
= os
->symtab_index();
8375 gsym
= object
->global_symbol(r_sym
);
8376 gold_assert(gsym
!= NULL
);
8377 if (gsym
->is_forwarder())
8378 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
8380 gold_assert(gsym
->has_symtab_index());
8381 r_sym
= gsym
->symtab_index();
8384 // Get the new offset--the location in the output section where
8385 // this relocation should be applied.
8386 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8387 offset
+= offset_in_output_section
;
8390 section_offset_type sot_offset
=
8391 convert_types
<section_offset_type
, Address
>(offset
);
8392 section_offset_type new_sot_offset
=
8393 output_section
->output_offset(object
, relinfo
->data_shndx
,
8395 gold_assert(new_sot_offset
!= -1);
8396 offset
= new_sot_offset
;
8399 // In an object file, r_offset is an offset within the section.
8400 // In an executable or dynamic object, generated by
8401 // --emit-relocs, r_offset is an absolute address.
8402 if (!parameters
->options().relocatable())
8404 offset
+= view_address
;
8405 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8406 offset
-= offset_in_output_section
;
8409 // Handle the reloc addend based on the strategy.
8410 if (strategy
== Relocatable_relocs::RELOC_COPY
)
8412 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
8414 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
8415 gold_assert(os
!= NULL
);
8416 addend
= psymval
->value(object
, addend
) - os
->address();
8418 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
8422 if (addend
>= 32768)
8423 addend
+= got2_addend
;
8425 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
8427 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
8430 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
8432 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
8433 addend
-= d_offset
+ 4;
8439 if (!parameters
->options().relocatable())
8441 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8442 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8443 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8444 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8446 // First instruction of a global dynamic sequence,
8448 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8449 switch (this->optimize_tls_gd(final
))
8451 case tls::TLSOPT_TO_IE
:
8452 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8453 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8455 case tls::TLSOPT_TO_LE
:
8456 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8457 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8458 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8461 r_type
= elfcpp::R_POWERPC_NONE
;
8469 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8470 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8471 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8472 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8474 // First instruction of a local dynamic sequence,
8476 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8478 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8479 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8481 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8482 const Output_section
* os
= relinfo
->layout
->tls_segment()
8484 gold_assert(os
!= NULL
);
8485 gold_assert(os
->needs_symtab_index());
8486 r_sym
= os
->symtab_index();
8487 addend
= dtp_offset
;
8491 r_type
= elfcpp::R_POWERPC_NONE
;
8496 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8497 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8498 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8499 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8501 // First instruction of initial exec sequence.
8502 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8503 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8505 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8506 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8507 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8510 r_type
= elfcpp::R_POWERPC_NONE
;
8515 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8516 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8518 // Second instruction of a global dynamic sequence,
8519 // the __tls_get_addr call
8520 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8521 switch (this->optimize_tls_gd(final
))
8523 case tls::TLSOPT_TO_IE
:
8524 r_type
= elfcpp::R_POWERPC_NONE
;
8527 case tls::TLSOPT_TO_LE
:
8528 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8536 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8537 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8539 // Second instruction of a local dynamic sequence,
8540 // the __tls_get_addr call
8541 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8543 const Output_section
* os
= relinfo
->layout
->tls_segment()
8545 gold_assert(os
!= NULL
);
8546 gold_assert(os
->needs_symtab_index());
8547 r_sym
= os
->symtab_index();
8548 addend
= dtp_offset
;
8549 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8554 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8556 // Second instruction of an initial exec sequence
8557 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8558 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8560 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8566 reloc_write
.put_r_offset(offset
);
8567 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
8568 reloc_write
.put_r_addend(addend
);
8570 pwrite
+= reloc_size
;
8573 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
8574 == reloc_view_size
);
8577 // Return the value to use for a dynamic symbol which requires special
8578 // treatment. This is how we support equality comparisons of function
8579 // pointers across shared library boundaries, as described in the
8580 // processor specific ABI supplement.
8582 template<int size
, bool big_endian
>
8584 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8588 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
8589 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8590 p
!= this->stub_tables_
.end();
8593 Address off
= (*p
)->find_plt_call_entry(gsym
);
8594 if (off
!= invalid_address
)
8595 return (*p
)->stub_address() + off
;
8598 else if (this->abiversion() >= 2)
8600 Address off
= this->glink_section()->find_global_entry(gsym
);
8601 if (off
!= invalid_address
)
8602 return this->glink_section()->global_entry_address() + off
;
8607 // Return the PLT address to use for a local symbol.
8608 template<int size
, bool big_endian
>
8610 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8611 const Relobj
* object
,
8612 unsigned int symndx
) const
8616 const Sized_relobj
<size
, big_endian
>* relobj
8617 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8618 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8619 p
!= this->stub_tables_
.end();
8622 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8624 if (off
!= invalid_address
)
8625 return (*p
)->stub_address() + off
;
8631 // Return the PLT address to use for a global symbol.
8632 template<int size
, bool big_endian
>
8634 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8635 const Symbol
* gsym
) const
8639 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8640 p
!= this->stub_tables_
.end();
8643 Address off
= (*p
)->find_plt_call_entry(gsym
);
8644 if (off
!= invalid_address
)
8645 return (*p
)->stub_address() + off
;
8648 else if (this->abiversion() >= 2)
8650 Address off
= this->glink_section()->find_global_entry(gsym
);
8651 if (off
!= invalid_address
)
8652 return this->glink_section()->global_entry_address() + off
;
8657 // Return the offset to use for the GOT_INDX'th got entry which is
8658 // for a local tls symbol specified by OBJECT, SYMNDX.
8659 template<int size
, bool big_endian
>
8661 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8662 const Relobj
* object
,
8663 unsigned int symndx
,
8664 unsigned int got_indx
) const
8666 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8667 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8668 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8670 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8671 got_type
<= GOT_TYPE_TPREL
;
8672 got_type
= Got_type(got_type
+ 1))
8673 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8675 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8676 if (got_type
== GOT_TYPE_TLSGD
)
8678 if (off
== got_indx
* (size
/ 8))
8680 if (got_type
== GOT_TYPE_TPREL
)
8690 // Return the offset to use for the GOT_INDX'th got entry which is
8691 // for global tls symbol GSYM.
8692 template<int size
, bool big_endian
>
8694 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8696 unsigned int got_indx
) const
8698 if (gsym
->type() == elfcpp::STT_TLS
)
8700 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8701 got_type
<= GOT_TYPE_TPREL
;
8702 got_type
= Got_type(got_type
+ 1))
8703 if (gsym
->has_got_offset(got_type
))
8705 unsigned int off
= gsym
->got_offset(got_type
);
8706 if (got_type
== GOT_TYPE_TLSGD
)
8708 if (off
== got_indx
* (size
/ 8))
8710 if (got_type
== GOT_TYPE_TPREL
)
8720 // The selector for powerpc object files.
8722 template<int size
, bool big_endian
>
8723 class Target_selector_powerpc
: public Target_selector
8726 Target_selector_powerpc()
8727 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8730 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8731 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8733 ? (big_endian
? "elf64ppc" : "elf64lppc")
8734 : (big_endian
? "elf32ppc" : "elf32lppc")))
8738 do_instantiate_target()
8739 { return new Target_powerpc
<size
, big_endian
>(); }
8742 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8743 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8744 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8745 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8747 // Instantiate these constants for -O0
8748 template<int size
, bool big_endian
>
8749 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8750 template<int size
, bool big_endian
>
8751 const typename Output_data_glink
<size
, big_endian
>::Address
8752 Output_data_glink
<size
, big_endian
>::invalid_address
;
8753 template<int size
, bool big_endian
>
8754 const typename Stub_table
<size
, big_endian
>::Address
8755 Stub_table
<size
, big_endian
>::invalid_address
;
8756 template<int size
, bool big_endian
>
8757 const typename Target_powerpc
<size
, big_endian
>::Address
8758 Target_powerpc
<size
, big_endian
>::invalid_address
;
8760 } // End anonymous namespace.