1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2016 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 // Scan the relocs for --emit-relocs.
668 emit_relocs_scan(Symbol_table
* symtab
,
670 Sized_relobj_file
<size
, big_endian
>* object
,
671 unsigned int data_shndx
,
672 unsigned int sh_type
,
673 const unsigned char* prelocs
,
675 Output_section
* output_section
,
676 bool needs_special_offset_handling
,
677 size_t local_symbol_count
,
678 const unsigned char* plocal_syms
,
679 Relocatable_relocs
* rr
);
681 // Emit relocations for a section.
683 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
684 unsigned int sh_type
,
685 const unsigned char* prelocs
,
687 Output_section
* output_section
,
688 typename
elfcpp::Elf_types
<size
>::Elf_Off
689 offset_in_output_section
,
691 Address view_address
,
693 unsigned char* reloc_view
,
694 section_size_type reloc_view_size
);
696 // Return whether SYM is defined by the ABI.
698 do_is_defined_by_abi(const Symbol
* sym
) const
700 return strcmp(sym
->name(), "__tls_get_addr") == 0;
703 // Return the size of the GOT section.
707 gold_assert(this->got_
!= NULL
);
708 return this->got_
->data_size();
711 // Get the PLT section.
712 const Output_data_plt_powerpc
<size
, big_endian
>*
715 gold_assert(this->plt_
!= NULL
);
719 // Get the IPLT section.
720 const Output_data_plt_powerpc
<size
, big_endian
>*
723 gold_assert(this->iplt_
!= NULL
);
727 // Get the .glink section.
728 const Output_data_glink
<size
, big_endian
>*
729 glink_section() const
731 gold_assert(this->glink_
!= NULL
);
735 Output_data_glink
<size
, big_endian
>*
738 gold_assert(this->glink_
!= NULL
);
742 bool has_glink() const
743 { return this->glink_
!= NULL
; }
745 // Get the GOT section.
746 const Output_data_got_powerpc
<size
, big_endian
>*
749 gold_assert(this->got_
!= NULL
);
753 // Get the GOT section, creating it if necessary.
754 Output_data_got_powerpc
<size
, big_endian
>*
755 got_section(Symbol_table
*, Layout
*);
758 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
759 const elfcpp::Ehdr
<size
, big_endian
>&);
761 // Return the number of entries in the GOT.
763 got_entry_count() const
765 if (this->got_
== NULL
)
767 return this->got_size() / (size
/ 8);
770 // Return the number of entries in the PLT.
772 plt_entry_count() const;
774 // Return the offset of the first non-reserved PLT entry.
776 first_plt_entry_offset() const
780 if (this->abiversion() >= 2)
785 // Return the size of each PLT entry.
787 plt_entry_size() const
791 if (this->abiversion() >= 2)
796 Output_data_save_res
<size
, big_endian
>*
797 savres_section() const
799 return this->savres_section_
;
802 // Add any special sections for this symbol to the gc work list.
803 // For powerpc64, this adds the code section of a function
806 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
808 // Handle target specific gc actions when adding a gc reference from
809 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
810 // and DST_OFF. For powerpc64, this adds a referenc to the code
811 // section of a function descriptor.
813 do_gc_add_reference(Symbol_table
* symtab
,
815 unsigned int src_shndx
,
817 unsigned int dst_shndx
,
818 Address dst_off
) const;
820 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
823 { return this->stub_tables_
; }
825 const Output_data_brlt_powerpc
<size
, big_endian
>*
827 { return this->brlt_section_
; }
830 add_branch_lookup_table(Address to
)
832 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
833 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
837 find_branch_lookup_table(Address to
)
839 typename
Branch_lookup_table::const_iterator p
840 = this->branch_lookup_table_
.find(to
);
841 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
845 write_branch_lookup_table(unsigned char *oview
)
847 for (typename
Branch_lookup_table::const_iterator p
848 = this->branch_lookup_table_
.begin();
849 p
!= this->branch_lookup_table_
.end();
852 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
857 plt_thread_safe() const
858 { return this->plt_thread_safe_
; }
862 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
865 set_abiversion (int ver
)
867 elfcpp::Elf_Word flags
= this->processor_specific_flags();
868 flags
&= ~elfcpp::EF_PPC64_ABI
;
869 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
870 this->set_processor_specific_flags(flags
);
873 // Offset to to save stack slot
876 { return this->abiversion() < 2 ? 40 : 24; }
892 : tls_get_addr_(NOT_EXPECTED
),
893 relinfo_(NULL
), relnum_(0), r_offset_(0)
898 if (this->tls_get_addr_
!= NOT_EXPECTED
)
905 if (this->relinfo_
!= NULL
)
906 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
907 _("missing expected __tls_get_addr call"));
911 expect_tls_get_addr_call(
912 const Relocate_info
<size
, big_endian
>* relinfo
,
916 this->tls_get_addr_
= EXPECTED
;
917 this->relinfo_
= relinfo
;
918 this->relnum_
= relnum
;
919 this->r_offset_
= r_offset
;
923 expect_tls_get_addr_call()
924 { this->tls_get_addr_
= EXPECTED
; }
927 skip_next_tls_get_addr_call()
928 {this->tls_get_addr_
= SKIP
; }
931 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
933 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
934 || r_type
== elfcpp::R_PPC_PLTREL24
)
936 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
937 Tls_get_addr last_tls
= this->tls_get_addr_
;
938 this->tls_get_addr_
= NOT_EXPECTED
;
939 if (is_tls_call
&& last_tls
!= EXPECTED
)
941 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
950 // What we're up to regarding calls to __tls_get_addr.
951 // On powerpc, the branch and link insn making a call to
952 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
953 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
954 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
955 // The marker relocation always comes first, and has the same
956 // symbol as the reloc on the insn setting up the __tls_get_addr
957 // argument. This ties the arg setup insn with the call insn,
958 // allowing ld to safely optimize away the call. We check that
959 // every call to __tls_get_addr has a marker relocation, and that
960 // every marker relocation is on a call to __tls_get_addr.
961 Tls_get_addr tls_get_addr_
;
962 // Info about the last reloc for error message.
963 const Relocate_info
<size
, big_endian
>* relinfo_
;
968 // The class which scans relocations.
969 class Scan
: protected Track_tls
972 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
975 : Track_tls(), issued_non_pic_error_(false)
979 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
982 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
983 Sized_relobj_file
<size
, big_endian
>* object
,
984 unsigned int data_shndx
,
985 Output_section
* output_section
,
986 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
987 const elfcpp::Sym
<size
, big_endian
>& lsym
,
991 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
992 Sized_relobj_file
<size
, big_endian
>* object
,
993 unsigned int data_shndx
,
994 Output_section
* output_section
,
995 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
999 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1001 Sized_relobj_file
<size
, big_endian
>* relobj
,
1004 const elfcpp::Rela
<size
, big_endian
>& ,
1005 unsigned int r_type
,
1006 const elfcpp::Sym
<size
, big_endian
>&)
1008 // PowerPC64 .opd is not folded, so any identical function text
1009 // may be folded and we'll still keep function addresses distinct.
1010 // That means no reloc is of concern here.
1013 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1014 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1015 if (ppcobj
->abiversion() == 1)
1018 // For 32-bit and ELFv2, conservatively assume anything but calls to
1019 // function code might be taking the address of the function.
1020 return !is_branch_reloc(r_type
);
1024 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1026 Sized_relobj_file
<size
, big_endian
>* relobj
,
1029 const elfcpp::Rela
<size
, big_endian
>& ,
1030 unsigned int r_type
,
1036 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1037 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1038 if (ppcobj
->abiversion() == 1)
1041 return !is_branch_reloc(r_type
);
1045 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1046 Sized_relobj_file
<size
, big_endian
>* object
,
1047 unsigned int r_type
, bool report_err
);
1051 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1052 unsigned int r_type
);
1055 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1056 unsigned int r_type
, Symbol
*);
1059 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1060 Target_powerpc
* target
);
1063 check_non_pic(Relobj
*, unsigned int r_type
);
1065 // Whether we have issued an error about a non-PIC compilation.
1066 bool issued_non_pic_error_
;
1070 symval_for_branch(const Symbol_table
* symtab
,
1071 const Sized_symbol
<size
>* gsym
,
1072 Powerpc_relobj
<size
, big_endian
>* object
,
1073 Address
*value
, unsigned int *dest_shndx
);
1075 // The class which implements relocation.
1076 class Relocate
: protected Track_tls
1079 // Use 'at' branch hints when true, 'y' when false.
1080 // FIXME maybe: set this with an option.
1081 static const bool is_isa_v2
= true;
1087 // Do a relocation. Return false if the caller should not issue
1088 // any warnings about this relocation.
1090 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1091 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1092 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1093 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1097 class Relocate_comdat_behavior
1100 // Decide what the linker should do for relocations that refer to
1101 // discarded comdat sections.
1102 inline Comdat_behavior
1103 get(const char* name
)
1105 gold::Default_comdat_behavior default_behavior
;
1106 Comdat_behavior ret
= default_behavior
.get(name
);
1107 if (ret
== CB_WARNING
)
1110 && (strcmp(name
, ".fixup") == 0
1111 || strcmp(name
, ".got2") == 0))
1114 && (strcmp(name
, ".opd") == 0
1115 || strcmp(name
, ".toc") == 0
1116 || strcmp(name
, ".toc1") == 0))
1123 // Optimize the TLS relocation type based on what we know about the
1124 // symbol. IS_FINAL is true if the final address of this symbol is
1125 // known at link time.
1127 tls::Tls_optimization
1128 optimize_tls_gd(bool is_final
)
1130 // If we are generating a shared library, then we can't do anything
1132 if (parameters
->options().shared())
1133 return tls::TLSOPT_NONE
;
1136 return tls::TLSOPT_TO_IE
;
1137 return tls::TLSOPT_TO_LE
;
1140 tls::Tls_optimization
1143 if (parameters
->options().shared())
1144 return tls::TLSOPT_NONE
;
1146 return tls::TLSOPT_TO_LE
;
1149 tls::Tls_optimization
1150 optimize_tls_ie(bool is_final
)
1152 if (!is_final
|| parameters
->options().shared())
1153 return tls::TLSOPT_NONE
;
1155 return tls::TLSOPT_TO_LE
;
1160 make_glink_section(Layout
*);
1162 // Create the PLT section.
1164 make_plt_section(Symbol_table
*, Layout
*);
1167 make_iplt_section(Symbol_table
*, Layout
*);
1170 make_brlt_section(Layout
*);
1172 // Create a PLT entry for a global symbol.
1174 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1176 // Create a PLT entry for a local IFUNC symbol.
1178 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1179 Sized_relobj_file
<size
, big_endian
>*,
1183 // Create a GOT entry for local dynamic __tls_get_addr.
1185 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1186 Sized_relobj_file
<size
, big_endian
>* object
);
1189 tlsld_got_offset() const
1191 return this->tlsld_got_offset_
;
1194 // Get the dynamic reloc section, creating it if necessary.
1196 rela_dyn_section(Layout
*);
1198 // Similarly, but for ifunc symbols get the one for ifunc.
1200 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1202 // Copy a relocation against a global symbol.
1204 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1205 Sized_relobj_file
<size
, big_endian
>* object
,
1206 unsigned int shndx
, Output_section
* output_section
,
1207 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1209 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1210 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1211 symtab
->get_sized_symbol
<size
>(sym
),
1212 object
, shndx
, output_section
,
1213 r_type
, reloc
.get_r_offset(),
1214 reloc
.get_r_addend(),
1215 this->rela_dyn_section(layout
));
1218 // Look over all the input sections, deciding where to place stubs.
1220 group_sections(Layout
*, const Task
*, bool);
1222 // Sort output sections by address.
1223 struct Sort_sections
1226 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1227 { return sec1
->address() < sec2
->address(); }
1233 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1234 unsigned int data_shndx
,
1236 unsigned int r_type
,
1239 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1240 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1246 // If this branch needs a plt call stub, or a long branch stub, make one.
1248 make_stub(Stub_table
<size
, big_endian
>*,
1249 Stub_table
<size
, big_endian
>*,
1250 Symbol_table
*) const;
1253 // The branch location..
1254 Powerpc_relobj
<size
, big_endian
>* object_
;
1255 unsigned int shndx_
;
1257 // ..and the branch type and destination.
1258 unsigned int r_type_
;
1259 unsigned int r_sym_
;
1263 // Information about this specific target which we pass to the
1264 // general Target structure.
1265 static Target::Target_info powerpc_info
;
1267 // The types of GOT entries needed for this platform.
1268 // These values are exposed to the ABI in an incremental link.
1269 // Do not renumber existing values without changing the version
1270 // number of the .gnu_incremental_inputs section.
1274 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1275 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1276 GOT_TYPE_TPREL
// entry for @got@tprel
1280 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1281 // The PLT section. This is a container for a table of addresses,
1282 // and their relocations. Each address in the PLT has a dynamic
1283 // relocation (R_*_JMP_SLOT) and each address will have a
1284 // corresponding entry in .glink for lazy resolution of the PLT.
1285 // ppc32 initialises the PLT to point at the .glink entry, while
1286 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1287 // linker adds a stub that loads the PLT entry into ctr then
1288 // branches to ctr. There may be more than one stub for each PLT
1289 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1290 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1291 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1292 // The IPLT section. Like plt_, this is a container for a table of
1293 // addresses and their relocations, specifically for STT_GNU_IFUNC
1294 // functions that resolve locally (STT_GNU_IFUNC functions that
1295 // don't resolve locally go in PLT). Unlike plt_, these have no
1296 // entry in .glink for lazy resolution, and the relocation section
1297 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1298 // the relocation section may contain relocations against
1299 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1300 // relocation section will appear at the end of other dynamic
1301 // relocations, so that ld.so applies these relocations after other
1302 // dynamic relocations. In a static executable, the relocation
1303 // section is emitted and marked with __rela_iplt_start and
1304 // __rela_iplt_end symbols.
1305 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1306 // Section holding long branch destinations.
1307 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1308 // The .glink section.
1309 Output_data_glink
<size
, big_endian
>* glink_
;
1310 // The dynamic reloc section.
1311 Reloc_section
* rela_dyn_
;
1312 // Relocs saved to avoid a COPY reloc.
1313 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1314 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1315 unsigned int tlsld_got_offset_
;
1317 Stub_tables stub_tables_
;
1318 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1319 Branch_lookup_table branch_lookup_table_
;
1321 typedef std::vector
<Branch_info
> Branches
;
1322 Branches branch_info_
;
1324 bool plt_thread_safe_
;
1327 int relax_fail_count_
;
1328 int32_t stub_group_size_
;
1330 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1334 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1337 true, // is_big_endian
1338 elfcpp::EM_PPC
, // machine_code
1339 false, // has_make_symbol
1340 false, // has_resolve
1341 false, // has_code_fill
1342 true, // is_default_stack_executable
1343 false, // can_icf_inline_merge_sections
1345 "/usr/lib/ld.so.1", // dynamic_linker
1346 0x10000000, // default_text_segment_address
1347 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1348 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1349 false, // isolate_execinstr
1351 elfcpp::SHN_UNDEF
, // small_common_shndx
1352 elfcpp::SHN_UNDEF
, // large_common_shndx
1353 0, // small_common_section_flags
1354 0, // large_common_section_flags
1355 NULL
, // attributes_section
1356 NULL
, // attributes_vendor
1357 "_start", // entry_symbol_name
1358 32, // hash_entry_size
1362 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1365 false, // is_big_endian
1366 elfcpp::EM_PPC
, // machine_code
1367 false, // has_make_symbol
1368 false, // has_resolve
1369 false, // has_code_fill
1370 true, // is_default_stack_executable
1371 false, // can_icf_inline_merge_sections
1373 "/usr/lib/ld.so.1", // dynamic_linker
1374 0x10000000, // default_text_segment_address
1375 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1376 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1377 false, // isolate_execinstr
1379 elfcpp::SHN_UNDEF
, // small_common_shndx
1380 elfcpp::SHN_UNDEF
, // large_common_shndx
1381 0, // small_common_section_flags
1382 0, // large_common_section_flags
1383 NULL
, // attributes_section
1384 NULL
, // attributes_vendor
1385 "_start", // entry_symbol_name
1386 32, // hash_entry_size
1390 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1393 true, // is_big_endian
1394 elfcpp::EM_PPC64
, // machine_code
1395 false, // has_make_symbol
1396 false, // has_resolve
1397 false, // has_code_fill
1398 true, // is_default_stack_executable
1399 false, // can_icf_inline_merge_sections
1401 "/usr/lib/ld.so.1", // dynamic_linker
1402 0x10000000, // default_text_segment_address
1403 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1404 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1405 false, // isolate_execinstr
1407 elfcpp::SHN_UNDEF
, // small_common_shndx
1408 elfcpp::SHN_UNDEF
, // large_common_shndx
1409 0, // small_common_section_flags
1410 0, // large_common_section_flags
1411 NULL
, // attributes_section
1412 NULL
, // attributes_vendor
1413 "_start", // entry_symbol_name
1414 32, // hash_entry_size
1418 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1421 false, // is_big_endian
1422 elfcpp::EM_PPC64
, // machine_code
1423 false, // has_make_symbol
1424 false, // has_resolve
1425 false, // has_code_fill
1426 true, // is_default_stack_executable
1427 false, // can_icf_inline_merge_sections
1429 "/usr/lib/ld.so.1", // dynamic_linker
1430 0x10000000, // default_text_segment_address
1431 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1432 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1433 false, // isolate_execinstr
1435 elfcpp::SHN_UNDEF
, // small_common_shndx
1436 elfcpp::SHN_UNDEF
, // large_common_shndx
1437 0, // small_common_section_flags
1438 0, // large_common_section_flags
1439 NULL
, // attributes_section
1440 NULL
, // attributes_vendor
1441 "_start", // entry_symbol_name
1442 32, // hash_entry_size
1446 is_branch_reloc(unsigned int r_type
)
1448 return (r_type
== elfcpp::R_POWERPC_REL24
1449 || r_type
== elfcpp::R_PPC_PLTREL24
1450 || r_type
== elfcpp::R_PPC_LOCAL24PC
1451 || r_type
== elfcpp::R_POWERPC_REL14
1452 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1453 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1454 || r_type
== elfcpp::R_POWERPC_ADDR24
1455 || r_type
== elfcpp::R_POWERPC_ADDR14
1456 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1457 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1460 // If INSN is an opcode that may be used with an @tls operand, return
1461 // the transformed insn for TLS optimisation, otherwise return 0. If
1462 // REG is non-zero only match an insn with RB or RA equal to REG.
1464 at_tls_transform(uint32_t insn
, unsigned int reg
)
1466 if ((insn
& (0x3f << 26)) != 31 << 26)
1470 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1471 rtra
= insn
& ((1 << 26) - (1 << 16));
1472 else if (((insn
>> 16) & 0x1f) == reg
)
1473 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1477 if ((insn
& (0x3ff << 1)) == 266 << 1)
1480 else if ((insn
& (0x1f << 1)) == 23 << 1
1481 && ((insn
& (0x1f << 6)) < 14 << 6
1482 || ((insn
& (0x1f << 6)) >= 16 << 6
1483 && (insn
& (0x1f << 6)) < 24 << 6)))
1484 // load and store indexed -> dform
1485 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1486 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1487 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1488 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1489 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1491 insn
= (58 << 26) | 2;
1499 template<int size
, bool big_endian
>
1500 class Powerpc_relocate_functions
1520 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1521 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1522 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1524 template<int valsize
>
1526 has_overflow_signed(Address value
)
1528 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1529 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1530 limit
<<= ((valsize
- 1) >> 1);
1531 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1532 return value
+ limit
> (limit
<< 1) - 1;
1535 template<int valsize
>
1537 has_overflow_unsigned(Address value
)
1539 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1540 limit
<<= ((valsize
- 1) >> 1);
1541 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1542 return value
> (limit
<< 1) - 1;
1545 template<int valsize
>
1547 has_overflow_bitfield(Address value
)
1549 return (has_overflow_unsigned
<valsize
>(value
)
1550 && has_overflow_signed
<valsize
>(value
));
1553 template<int valsize
>
1554 static inline Status
1555 overflowed(Address value
, Overflow_check overflow
)
1557 if (overflow
== CHECK_SIGNED
)
1559 if (has_overflow_signed
<valsize
>(value
))
1560 return STATUS_OVERFLOW
;
1562 else if (overflow
== CHECK_UNSIGNED
)
1564 if (has_overflow_unsigned
<valsize
>(value
))
1565 return STATUS_OVERFLOW
;
1567 else if (overflow
== CHECK_BITFIELD
)
1569 if (has_overflow_bitfield
<valsize
>(value
))
1570 return STATUS_OVERFLOW
;
1575 // Do a simple RELA relocation
1576 template<int fieldsize
, int valsize
>
1577 static inline Status
1578 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1580 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1581 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1582 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1583 return overflowed
<valsize
>(value
, overflow
);
1586 template<int fieldsize
, int valsize
>
1587 static inline Status
1588 rela(unsigned char* view
,
1589 unsigned int right_shift
,
1590 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1592 Overflow_check overflow
)
1594 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1595 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1596 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1597 Valtype reloc
= value
>> right_shift
;
1600 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1601 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1604 // Do a simple RELA relocation, unaligned.
1605 template<int fieldsize
, int valsize
>
1606 static inline Status
1607 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1609 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1610 return overflowed
<valsize
>(value
, overflow
);
1613 template<int fieldsize
, int valsize
>
1614 static inline Status
1615 rela_ua(unsigned char* view
,
1616 unsigned int right_shift
,
1617 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1619 Overflow_check overflow
)
1621 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1623 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1624 Valtype reloc
= value
>> right_shift
;
1627 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1628 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1632 // R_PPC64_ADDR64: (Symbol + Addend)
1634 addr64(unsigned char* view
, Address value
)
1635 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1637 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1639 addr64_u(unsigned char* view
, Address value
)
1640 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1642 // R_POWERPC_ADDR32: (Symbol + Addend)
1643 static inline Status
1644 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1645 { return This::template rela
<32,32>(view
, value
, overflow
); }
1647 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1648 static inline Status
1649 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1650 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1652 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1653 static inline Status
1654 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1656 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1658 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1659 stat
= STATUS_OVERFLOW
;
1663 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1664 static inline Status
1665 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1666 { return This::template rela
<16,16>(view
, value
, overflow
); }
1668 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1669 static inline Status
1670 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1671 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1673 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1674 static inline Status
1675 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1677 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1678 if ((value
& 3) != 0)
1679 stat
= STATUS_OVERFLOW
;
1683 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1684 static inline Status
1685 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1687 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1688 if ((value
& 15) != 0)
1689 stat
= STATUS_OVERFLOW
;
1693 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1695 addr16_hi(unsigned char* view
, Address value
)
1696 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1698 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1700 addr16_ha(unsigned char* view
, Address value
)
1701 { This::addr16_hi(view
, value
+ 0x8000); }
1703 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1705 addr16_hi2(unsigned char* view
, Address value
)
1706 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1708 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1710 addr16_ha2(unsigned char* view
, Address value
)
1711 { This::addr16_hi2(view
, value
+ 0x8000); }
1713 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1715 addr16_hi3(unsigned char* view
, Address value
)
1716 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1718 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1720 addr16_ha3(unsigned char* view
, Address value
)
1721 { This::addr16_hi3(view
, value
+ 0x8000); }
1723 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1724 static inline Status
1725 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1727 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1728 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1729 stat
= STATUS_OVERFLOW
;
1733 // R_POWERPC_REL16DX_HA
1734 static inline Status
1735 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
1737 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
1738 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1739 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
1741 value
= static_cast<SignedAddress
>(value
) >> 16;
1742 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
1743 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
1744 return overflowed
<16>(value
, overflow
);
1748 // Set ABI version for input and output.
1750 template<int size
, bool big_endian
>
1752 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1754 this->e_flags_
|= ver
;
1755 if (this->abiversion() != 0)
1757 Target_powerpc
<size
, big_endian
>* target
=
1758 static_cast<Target_powerpc
<size
, big_endian
>*>(
1759 parameters
->sized_target
<size
, big_endian
>());
1760 if (target
->abiversion() == 0)
1761 target
->set_abiversion(this->abiversion());
1762 else if (target
->abiversion() != this->abiversion())
1763 gold_error(_("%s: ABI version %d is not compatible "
1764 "with ABI version %d output"),
1765 this->name().c_str(),
1766 this->abiversion(), target
->abiversion());
1771 // Stash away the index of .got2 or .opd in a relocatable object, if
1772 // such a section exists.
1774 template<int size
, bool big_endian
>
1776 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1777 Read_symbols_data
* sd
)
1779 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1780 const unsigned char* namesu
= sd
->section_names
->data();
1781 const char* names
= reinterpret_cast<const char*>(namesu
);
1782 section_size_type names_size
= sd
->section_names_size
;
1783 const unsigned char* s
;
1785 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1786 size
== 32 ? ".got2" : ".opd",
1787 names
, names_size
, NULL
);
1790 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1791 this->special_
= ndx
;
1794 if (this->abiversion() == 0)
1795 this->set_abiversion(1);
1796 else if (this->abiversion() > 1)
1797 gold_error(_("%s: .opd invalid in abiv%d"),
1798 this->name().c_str(), this->abiversion());
1801 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1804 // Examine .rela.opd to build info about function entry points.
1806 template<int size
, bool big_endian
>
1808 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1810 const unsigned char* prelocs
,
1811 const unsigned char* plocal_syms
)
1815 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1817 const int reloc_size
1818 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1819 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1820 Address expected_off
= 0;
1821 bool regular
= true;
1822 unsigned int opd_ent_size
= 0;
1824 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1826 Reltype
reloc(prelocs
);
1827 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1828 = reloc
.get_r_info();
1829 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1830 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1832 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1833 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1836 if (r_sym
< this->local_symbol_count())
1838 typename
elfcpp::Sym
<size
, big_endian
>
1839 lsym(plocal_syms
+ r_sym
* sym_size
);
1840 shndx
= lsym
.get_st_shndx();
1841 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1842 value
= lsym
.get_st_value();
1845 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1847 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1848 value
+ reloc
.get_r_addend());
1851 expected_off
= reloc
.get_r_offset();
1852 opd_ent_size
= expected_off
;
1854 else if (expected_off
!= reloc
.get_r_offset())
1856 expected_off
+= opd_ent_size
;
1858 else if (r_type
== elfcpp::R_PPC64_TOC
)
1860 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1865 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1866 this->name().c_str(), r_type
);
1870 if (reloc_count
<= 2)
1871 opd_ent_size
= this->section_size(this->opd_shndx());
1872 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1876 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1877 this->name().c_str());
1883 template<int size
, bool big_endian
>
1885 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1887 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1890 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1891 p
!= rd
->relocs
.end();
1894 if (p
->data_shndx
== this->opd_shndx())
1896 uint64_t opd_size
= this->section_size(this->opd_shndx());
1897 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1900 this->init_opd(opd_size
);
1901 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1902 rd
->local_symbols
->data());
1910 // Read the symbols then set up st_other vector.
1912 template<int size
, bool big_endian
>
1914 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1916 this->base_read_symbols(sd
);
1919 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1920 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1921 const unsigned int loccount
= this->do_local_symbol_count();
1924 this->st_other_
.resize(loccount
);
1925 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1926 off_t locsize
= loccount
* sym_size
;
1927 const unsigned int symtab_shndx
= this->symtab_shndx();
1928 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1929 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1930 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1931 locsize
, true, false);
1933 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1935 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1936 unsigned char st_other
= sym
.get_st_other();
1937 this->st_other_
[i
] = st_other
;
1938 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1940 if (this->abiversion() == 0)
1941 this->set_abiversion(2);
1942 else if (this->abiversion() < 2)
1943 gold_error(_("%s: local symbol %d has invalid st_other"
1944 " for ABI version 1"),
1945 this->name().c_str(), i
);
1952 template<int size
, bool big_endian
>
1954 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1956 this->e_flags_
|= ver
;
1957 if (this->abiversion() != 0)
1959 Target_powerpc
<size
, big_endian
>* target
=
1960 static_cast<Target_powerpc
<size
, big_endian
>*>(
1961 parameters
->sized_target
<size
, big_endian
>());
1962 if (target
->abiversion() == 0)
1963 target
->set_abiversion(this->abiversion());
1964 else if (target
->abiversion() != this->abiversion())
1965 gold_error(_("%s: ABI version %d is not compatible "
1966 "with ABI version %d output"),
1967 this->name().c_str(),
1968 this->abiversion(), target
->abiversion());
1973 // Call Sized_dynobj::base_read_symbols to read the symbols then
1974 // read .opd from a dynamic object, filling in opd_ent_ vector,
1976 template<int size
, bool big_endian
>
1978 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1980 this->base_read_symbols(sd
);
1983 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1984 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1985 const unsigned char* namesu
= sd
->section_names
->data();
1986 const char* names
= reinterpret_cast<const char*>(namesu
);
1987 const unsigned char* s
= NULL
;
1988 const unsigned char* opd
;
1989 section_size_type opd_size
;
1991 // Find and read .opd section.
1994 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1995 sd
->section_names_size
,
2000 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2001 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2002 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2004 if (this->abiversion() == 0)
2005 this->set_abiversion(1);
2006 else if (this->abiversion() > 1)
2007 gold_error(_("%s: .opd invalid in abiv%d"),
2008 this->name().c_str(), this->abiversion());
2010 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2011 this->opd_address_
= shdr
.get_sh_addr();
2012 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2013 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2019 // Build set of executable sections.
2020 // Using a set is probably overkill. There is likely to be only
2021 // a few executable sections, typically .init, .text and .fini,
2022 // and they are generally grouped together.
2023 typedef std::set
<Sec_info
> Exec_sections
;
2024 Exec_sections exec_sections
;
2026 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2028 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2029 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2030 && ((shdr
.get_sh_flags()
2031 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2032 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2033 && shdr
.get_sh_size() != 0)
2035 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2036 shdr
.get_sh_size(), i
));
2039 if (exec_sections
.empty())
2042 // Look over the OPD entries. This is complicated by the fact
2043 // that some binaries will use two-word entries while others
2044 // will use the standard three-word entries. In most cases
2045 // the third word (the environment pointer for languages like
2046 // Pascal) is unused and will be zero. If the third word is
2047 // used it should not be pointing into executable sections,
2049 this->init_opd(opd_size
);
2050 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2052 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2053 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2054 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2056 // Chances are that this is the third word of an OPD entry.
2058 typename
Exec_sections::const_iterator e
2059 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2060 if (e
!= exec_sections
.begin())
2063 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2065 // We have an address in an executable section.
2066 // VAL ought to be the function entry, set it up.
2067 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2068 // Skip second word of OPD entry, the TOC pointer.
2072 // If we didn't match any executable sections, we likely
2073 // have a non-zero third word in the OPD entry.
2078 // Set up some symbols.
2080 template<int size
, bool big_endian
>
2082 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2083 Symbol_table
* symtab
,
2088 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2089 // undefined when scanning relocs (and thus requires
2090 // non-relative dynamic relocs). The proper value will be
2092 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2093 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2095 Target_powerpc
<size
, big_endian
>* target
=
2096 static_cast<Target_powerpc
<size
, big_endian
>*>(
2097 parameters
->sized_target
<size
, big_endian
>());
2098 Output_data_got_powerpc
<size
, big_endian
>* got
2099 = target
->got_section(symtab
, layout
);
2100 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2101 Symbol_table::PREDEFINED
,
2105 elfcpp::STV_HIDDEN
, 0,
2109 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2110 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2111 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2113 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2115 = layout
->add_output_section_data(".sdata", 0,
2117 | elfcpp::SHF_WRITE
,
2118 sdata
, ORDER_SMALL_DATA
, false);
2119 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2120 Symbol_table::PREDEFINED
,
2121 os
, 32768, 0, elfcpp::STT_OBJECT
,
2122 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2128 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2129 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2130 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2132 Target_powerpc
<size
, big_endian
>* target
=
2133 static_cast<Target_powerpc
<size
, big_endian
>*>(
2134 parameters
->sized_target
<size
, big_endian
>());
2135 Output_data_got_powerpc
<size
, big_endian
>* got
2136 = target
->got_section(symtab
, layout
);
2137 symtab
->define_in_output_data(".TOC.", NULL
,
2138 Symbol_table::PREDEFINED
,
2142 elfcpp::STV_HIDDEN
, 0,
2148 // Set up PowerPC target specific relobj.
2150 template<int size
, bool big_endian
>
2152 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2153 const std::string
& name
,
2154 Input_file
* input_file
,
2155 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2157 int et
= ehdr
.get_e_type();
2158 // ET_EXEC files are valid input for --just-symbols/-R,
2159 // and we treat them as relocatable objects.
2160 if (et
== elfcpp::ET_REL
2161 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2163 Powerpc_relobj
<size
, big_endian
>* obj
=
2164 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2168 else if (et
== elfcpp::ET_DYN
)
2170 Powerpc_dynobj
<size
, big_endian
>* obj
=
2171 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2177 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2182 template<int size
, bool big_endian
>
2183 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2186 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2187 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2189 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2190 : Output_data_got
<size
, big_endian
>(),
2191 symtab_(symtab
), layout_(layout
),
2192 header_ent_cnt_(size
== 32 ? 3 : 1),
2193 header_index_(size
== 32 ? 0x2000 : 0)
2196 this->set_addralign(256);
2199 // Override all the Output_data_got methods we use so as to first call
2202 add_global(Symbol
* gsym
, unsigned int got_type
)
2204 this->reserve_ent();
2205 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2209 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2211 this->reserve_ent();
2212 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2216 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2217 { return this->add_global_plt(gsym
, got_type
); }
2220 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2221 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2223 this->reserve_ent();
2224 Output_data_got
<size
, big_endian
>::
2225 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2229 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2230 Output_data_reloc_generic
* rel_dyn
,
2231 unsigned int r_type_1
, unsigned int r_type_2
)
2233 this->reserve_ent(2);
2234 Output_data_got
<size
, big_endian
>::
2235 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2239 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2241 this->reserve_ent();
2242 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2247 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2249 this->reserve_ent();
2250 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2255 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2256 { return this->add_local_plt(object
, sym_index
, got_type
); }
2259 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2260 unsigned int got_type
,
2261 Output_data_reloc_generic
* rel_dyn
,
2262 unsigned int r_type
)
2264 this->reserve_ent(2);
2265 Output_data_got
<size
, big_endian
>::
2266 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2270 add_constant(Valtype constant
)
2272 this->reserve_ent();
2273 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2277 add_constant_pair(Valtype c1
, Valtype c2
)
2279 this->reserve_ent(2);
2280 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2283 // Offset of _GLOBAL_OFFSET_TABLE_.
2287 return this->got_offset(this->header_index_
);
2290 // Offset of base used to access the GOT/TOC.
2291 // The got/toc pointer reg will be set to this value.
2293 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2296 return this->g_o_t();
2298 return (this->output_section()->address()
2299 + object
->toc_base_offset()
2303 // Ensure our GOT has a header.
2305 set_final_data_size()
2307 if (this->header_ent_cnt_
!= 0)
2308 this->make_header();
2309 Output_data_got
<size
, big_endian
>::set_final_data_size();
2312 // First word of GOT header needs some values that are not
2313 // handled by Output_data_got so poke them in here.
2314 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2316 do_write(Output_file
* of
)
2319 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2320 val
= this->layout_
->dynamic_section()->address();
2322 val
= this->output_section()->address() + 0x8000;
2323 this->replace_constant(this->header_index_
, val
);
2324 Output_data_got
<size
, big_endian
>::do_write(of
);
2329 reserve_ent(unsigned int cnt
= 1)
2331 if (this->header_ent_cnt_
== 0)
2333 if (this->num_entries() + cnt
> this->header_index_
)
2334 this->make_header();
2340 this->header_ent_cnt_
= 0;
2341 this->header_index_
= this->num_entries();
2344 Output_data_got
<size
, big_endian
>::add_constant(0);
2345 Output_data_got
<size
, big_endian
>::add_constant(0);
2346 Output_data_got
<size
, big_endian
>::add_constant(0);
2348 // Define _GLOBAL_OFFSET_TABLE_ at the header
2349 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2352 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2353 sym
->set_value(this->g_o_t());
2356 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2357 Symbol_table::PREDEFINED
,
2358 this, this->g_o_t(), 0,
2361 elfcpp::STV_HIDDEN
, 0,
2365 Output_data_got
<size
, big_endian
>::add_constant(0);
2368 // Stashed pointers.
2369 Symbol_table
* symtab_
;
2373 unsigned int header_ent_cnt_
;
2374 // GOT header index.
2375 unsigned int header_index_
;
2378 // Get the GOT section, creating it if necessary.
2380 template<int size
, bool big_endian
>
2381 Output_data_got_powerpc
<size
, big_endian
>*
2382 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2385 if (this->got_
== NULL
)
2387 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2390 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2392 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2393 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2394 this->got_
, ORDER_DATA
, false);
2400 // Get the dynamic reloc section, creating it if necessary.
2402 template<int size
, bool big_endian
>
2403 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2404 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2406 if (this->rela_dyn_
== NULL
)
2408 gold_assert(layout
!= NULL
);
2409 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2410 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2411 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2412 ORDER_DYNAMIC_RELOCS
, false);
2414 return this->rela_dyn_
;
2417 // Similarly, but for ifunc symbols get the one for ifunc.
2419 template<int size
, bool big_endian
>
2420 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2421 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2426 return this->rela_dyn_section(layout
);
2428 if (this->iplt_
== NULL
)
2429 this->make_iplt_section(symtab
, layout
);
2430 return this->iplt_
->rel_plt();
2436 // Determine the stub group size. The group size is the absolute
2437 // value of the parameter --stub-group-size. If --stub-group-size
2438 // is passed a negative value, we restrict stubs to be always before
2439 // the stubbed branches.
2440 Stub_control(int32_t size
, bool no_size_errors
)
2441 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2442 stub14_group_size_(abs(size
) >> 10),
2443 stubs_always_before_branch_(size
< 0),
2444 suppress_size_errors_(no_size_errors
),
2445 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2449 // Return true iff input section can be handled by current stub
2452 can_add_to_stub_group(Output_section
* o
,
2453 const Output_section::Input_section
* i
,
2456 const Output_section::Input_section
*
2462 { return output_section_
; }
2465 set_output_and_owner(Output_section
* o
,
2466 const Output_section::Input_section
* i
)
2468 this->output_section_
= o
;
2476 FINDING_STUB_SECTION
,
2481 uint32_t stub_group_size_
;
2482 uint32_t stub14_group_size_
;
2483 bool stubs_always_before_branch_
;
2484 bool suppress_size_errors_
;
2485 uint64_t group_end_addr_
;
2486 const Output_section::Input_section
* owner_
;
2487 Output_section
* output_section_
;
2490 // Return true iff input section can be handled by current stub
2494 Stub_control::can_add_to_stub_group(Output_section
* o
,
2495 const Output_section::Input_section
* i
,
2499 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2500 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2502 uint64_t start_addr
= o
->address();
2505 // .init and .fini sections are pasted together to form a single
2506 // function. We can't be adding stubs in the middle of the function.
2507 this_size
= o
->data_size();
2510 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2511 this_size
= i
->data_size();
2513 uint64_t end_addr
= start_addr
+ this_size
;
2514 bool toobig
= this_size
> group_size
;
2516 if (toobig
&& !this->suppress_size_errors_
)
2517 gold_warning(_("%s:%s exceeds group size"),
2518 i
->relobj()->name().c_str(),
2519 i
->relobj()->section_name(i
->shndx()).c_str());
2521 if (this->state_
!= HAS_STUB_SECTION
2522 && (!whole_sec
|| this->output_section_
!= o
)
2523 && (this->state_
== NO_GROUP
2524 || this->group_end_addr_
- end_addr
< group_size
))
2527 this->output_section_
= o
;
2530 if (this->state_
== NO_GROUP
)
2532 this->state_
= FINDING_STUB_SECTION
;
2533 this->group_end_addr_
= end_addr
;
2535 else if (this->group_end_addr_
- start_addr
< group_size
)
2537 // Adding this section would make the group larger than GROUP_SIZE.
2538 else if (this->state_
== FINDING_STUB_SECTION
2539 && !this->stubs_always_before_branch_
2542 // But wait, there's more! Input sections up to GROUP_SIZE
2543 // bytes before the stub table can be handled by it too.
2544 this->state_
= HAS_STUB_SECTION
;
2545 this->group_end_addr_
= end_addr
;
2549 this->state_
= NO_GROUP
;
2555 // Look over all the input sections, deciding where to place stubs.
2557 template<int size
, bool big_endian
>
2559 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2561 bool no_size_errors
)
2563 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
);
2565 // Group input sections and insert stub table
2566 Stub_table_owner
* table_owner
= NULL
;
2567 std::vector
<Stub_table_owner
*> tables
;
2568 Layout::Section_list section_list
;
2569 layout
->get_executable_sections(§ion_list
);
2570 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2571 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2572 o
!= section_list
.rend();
2575 typedef Output_section::Input_section_list Input_section_list
;
2576 for (Input_section_list::const_reverse_iterator i
2577 = (*o
)->input_sections().rbegin();
2578 i
!= (*o
)->input_sections().rend();
2581 if (i
->is_input_section()
2582 || i
->is_relaxed_input_section())
2584 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2585 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2586 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2587 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2589 table_owner
->output_section
= stub_control
.output_section();
2590 table_owner
->owner
= stub_control
.owner();
2591 stub_control
.set_output_and_owner(*o
, &*i
);
2594 if (table_owner
== NULL
)
2596 table_owner
= new Stub_table_owner
;
2597 tables
.push_back(table_owner
);
2599 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2603 if (table_owner
!= NULL
)
2605 const Output_section::Input_section
* i
= stub_control
.owner();
2607 if (tables
.size() >= 2 && tables
[tables
.size() - 2]->owner
== i
)
2609 // Corner case. A new stub group was made for the first
2610 // section (last one looked at here) for some reason, but
2611 // the first section is already being used as the owner for
2612 // a stub table for following sections. Force it into that
2616 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2617 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2618 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2622 table_owner
->output_section
= stub_control
.output_section();
2623 table_owner
->owner
= i
;
2626 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2630 Stub_table
<size
, big_endian
>* stub_table
;
2632 if ((*t
)->owner
->is_input_section())
2633 stub_table
= new Stub_table
<size
, big_endian
>(this,
2634 (*t
)->output_section
,
2636 else if ((*t
)->owner
->is_relaxed_input_section())
2637 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2638 (*t
)->owner
->relaxed_input_section());
2641 this->stub_tables_
.push_back(stub_table
);
2646 static unsigned long
2647 max_branch_delta (unsigned int r_type
)
2649 if (r_type
== elfcpp::R_POWERPC_REL14
2650 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2651 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2653 if (r_type
== elfcpp::R_POWERPC_REL24
2654 || r_type
== elfcpp::R_PPC_PLTREL24
2655 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2660 // If this branch needs a plt call stub, or a long branch stub, make one.
2662 template<int size
, bool big_endian
>
2664 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2665 Stub_table
<size
, big_endian
>* stub_table
,
2666 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2667 Symbol_table
* symtab
) const
2669 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2670 if (sym
!= NULL
&& sym
->is_forwarder())
2671 sym
= symtab
->resolve_forwards(sym
);
2672 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2673 Target_powerpc
<size
, big_endian
>* target
=
2674 static_cast<Target_powerpc
<size
, big_endian
>*>(
2675 parameters
->sized_target
<size
, big_endian
>());
2677 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2678 : this->object_
->local_has_plt_offset(this->r_sym_
))
2682 && target
->abiversion() >= 2
2683 && !parameters
->options().output_is_position_independent()
2684 && !is_branch_reloc(this->r_type_
))
2685 target
->glink_section()->add_global_entry(gsym
);
2688 if (stub_table
== NULL
)
2689 stub_table
= this->object_
->stub_table(this->shndx_
);
2690 if (stub_table
== NULL
)
2692 // This is a ref from a data section to an ifunc symbol.
2693 stub_table
= ifunc_stub_table
;
2695 gold_assert(stub_table
!= NULL
);
2696 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2697 if (from
!= invalid_address
)
2698 from
+= (this->object_
->output_section(this->shndx_
)->address()
2701 return stub_table
->add_plt_call_entry(from
,
2702 this->object_
, gsym
,
2703 this->r_type_
, this->addend_
);
2705 return stub_table
->add_plt_call_entry(from
,
2706 this->object_
, this->r_sym_
,
2707 this->r_type_
, this->addend_
);
2712 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2713 if (max_branch_offset
== 0)
2715 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2716 gold_assert(from
!= invalid_address
);
2717 from
+= (this->object_
->output_section(this->shndx_
)->address()
2722 switch (gsym
->source())
2724 case Symbol::FROM_OBJECT
:
2726 Object
* symobj
= gsym
->object();
2727 if (symobj
->is_dynamic()
2728 || symobj
->pluginobj() != NULL
)
2731 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2732 if (shndx
== elfcpp::SHN_UNDEF
)
2737 case Symbol::IS_UNDEFINED
:
2743 Symbol_table::Compute_final_value_status status
;
2744 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2745 if (status
!= Symbol_table::CFVS_OK
)
2748 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2752 const Symbol_value
<size
>* psymval
2753 = this->object_
->local_symbol(this->r_sym_
);
2754 Symbol_value
<size
> symval
;
2755 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2756 typename
ObjType::Compute_final_local_value_status status
2757 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2759 if (status
!= ObjType::CFLV_OK
2760 || !symval
.has_output_value())
2762 to
= symval
.value(this->object_
, 0);
2764 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2766 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2767 to
+= this->addend_
;
2768 if (stub_table
== NULL
)
2769 stub_table
= this->object_
->stub_table(this->shndx_
);
2770 if (size
== 64 && target
->abiversion() < 2)
2772 unsigned int dest_shndx
;
2773 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2777 Address delta
= to
- from
;
2778 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2780 if (stub_table
== NULL
)
2782 gold_warning(_("%s:%s: branch in non-executable section,"
2783 " no long branch stub for you"),
2784 this->object_
->name().c_str(),
2785 this->object_
->section_name(this->shndx_
).c_str());
2788 bool save_res
= (size
== 64
2790 && gsym
->source() == Symbol::IN_OUTPUT_DATA
2791 && gsym
->output_data() == target
->savres_section());
2792 return stub_table
->add_long_branch_entry(this->object_
,
2794 from
, to
, save_res
);
2800 // Relaxation hook. This is where we do stub generation.
2802 template<int size
, bool big_endian
>
2804 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2805 const Input_objects
*,
2806 Symbol_table
* symtab
,
2810 unsigned int prev_brlt_size
= 0;
2814 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
2816 && this->abiversion() < 2
2818 && !parameters
->options().user_set_plt_thread_safe())
2820 static const char* const thread_starter
[] =
2824 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2826 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2827 "mq_notify", "create_timer",
2832 "GOMP_parallel_start",
2833 "GOMP_parallel_loop_static",
2834 "GOMP_parallel_loop_static_start",
2835 "GOMP_parallel_loop_dynamic",
2836 "GOMP_parallel_loop_dynamic_start",
2837 "GOMP_parallel_loop_guided",
2838 "GOMP_parallel_loop_guided_start",
2839 "GOMP_parallel_loop_runtime",
2840 "GOMP_parallel_loop_runtime_start",
2841 "GOMP_parallel_sections",
2842 "GOMP_parallel_sections_start",
2847 if (parameters
->options().shared())
2851 for (unsigned int i
= 0;
2852 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2855 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2856 thread_safe
= (sym
!= NULL
2858 && sym
->in_real_elf());
2864 this->plt_thread_safe_
= thread_safe
;
2869 this->stub_group_size_
= parameters
->options().stub_group_size();
2870 bool no_size_errors
= true;
2871 if (this->stub_group_size_
== 1)
2872 this->stub_group_size_
= 0x1c00000;
2873 else if (this->stub_group_size_
== -1)
2874 this->stub_group_size_
= -0x1e00000;
2876 no_size_errors
= false;
2877 this->group_sections(layout
, task
, no_size_errors
);
2879 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
2881 this->branch_lookup_table_
.clear();
2882 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2883 p
!= this->stub_tables_
.end();
2886 (*p
)->clear_stubs(true);
2888 this->stub_tables_
.clear();
2889 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
2890 gold_info(_("%s: stub group size is too large; retrying with %d"),
2891 program_name
, this->stub_group_size_
);
2892 this->group_sections(layout
, task
, true);
2895 // We need address of stub tables valid for make_stub.
2896 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2897 p
!= this->stub_tables_
.end();
2900 const Powerpc_relobj
<size
, big_endian
>* object
2901 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2902 Address off
= object
->get_output_section_offset((*p
)->shndx());
2903 gold_assert(off
!= invalid_address
);
2904 Output_section
* os
= (*p
)->output_section();
2905 (*p
)->set_address_and_size(os
, off
);
2910 // Clear plt call stubs, long branch stubs and branch lookup table.
2911 prev_brlt_size
= this->branch_lookup_table_
.size();
2912 this->branch_lookup_table_
.clear();
2913 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2914 p
!= this->stub_tables_
.end();
2917 (*p
)->clear_stubs(false);
2921 // Build all the stubs.
2922 this->relax_failed_
= false;
2923 Stub_table
<size
, big_endian
>* ifunc_stub_table
2924 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2925 Stub_table
<size
, big_endian
>* one_stub_table
2926 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2927 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2928 b
!= this->branch_info_
.end();
2931 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
2932 && !this->relax_failed_
)
2934 this->relax_failed_
= true;
2935 this->relax_fail_count_
++;
2936 if (this->relax_fail_count_
< 3)
2941 // Did anything change size?
2942 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2943 bool again
= num_huge_branches
!= prev_brlt_size
;
2944 if (size
== 64 && num_huge_branches
!= 0)
2945 this->make_brlt_section(layout
);
2946 if (size
== 64 && again
)
2947 this->brlt_section_
->set_current_size(num_huge_branches
);
2949 typedef Unordered_set
<Output_section
*> Output_sections
;
2950 Output_sections os_need_update
;
2951 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2952 p
!= this->stub_tables_
.end();
2955 if ((*p
)->size_update())
2958 (*p
)->add_eh_frame(layout
);
2959 os_need_update
.insert((*p
)->output_section());
2963 // Set output section offsets for all input sections in an output
2964 // section that just changed size. Anything past the stubs will
2966 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2967 p
!= os_need_update
.end();
2970 Output_section
* os
= *p
;
2972 typedef Output_section::Input_section_list Input_section_list
;
2973 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2974 i
!= os
->input_sections().end();
2977 off
= align_address(off
, i
->addralign());
2978 if (i
->is_input_section() || i
->is_relaxed_input_section())
2979 i
->relobj()->set_section_offset(i
->shndx(), off
);
2980 if (i
->is_relaxed_input_section())
2982 Stub_table
<size
, big_endian
>* stub_table
2983 = static_cast<Stub_table
<size
, big_endian
>*>(
2984 i
->relaxed_input_section());
2985 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
2986 off
+= stub_table_size
;
2987 // After a few iterations, set current stub table size
2988 // as min size threshold, so later stub tables can only
2991 stub_table
->set_min_size_threshold(stub_table_size
);
2994 off
+= i
->data_size();
2996 // If .branch_lt is part of this output section, then we have
2997 // just done the offset adjustment.
2998 os
->clear_section_offsets_need_adjustment();
3003 && num_huge_branches
!= 0
3004 && parameters
->options().output_is_position_independent())
3006 // Fill in the BRLT relocs.
3007 this->brlt_section_
->reset_brlt_sizes();
3008 for (typename
Branch_lookup_table::const_iterator p
3009 = this->branch_lookup_table_
.begin();
3010 p
!= this->branch_lookup_table_
.end();
3013 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3015 this->brlt_section_
->finalize_brlt_sizes();
3020 template<int size
, bool big_endian
>
3022 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3023 unsigned char* oview
,
3027 uint64_t address
= plt
->address();
3028 off_t len
= plt
->data_size();
3030 if (plt
== this->glink_
)
3032 // See Output_data_glink::do_write() for glink contents.
3035 gold_assert(parameters
->doing_static_link());
3036 // Static linking may need stubs, to support ifunc and long
3037 // branches. We need to create an output section for
3038 // .eh_frame early in the link process, to have a place to
3039 // attach stub .eh_frame info. We also need to have
3040 // registered a CIE that matches the stub CIE. Both of
3041 // these requirements are satisfied by creating an FDE and
3042 // CIE for .glink, even though static linking will leave
3043 // .glink zero length.
3044 // ??? Hopefully generating an FDE with a zero address range
3045 // won't confuse anything that consumes .eh_frame info.
3047 else if (size
== 64)
3049 // There is one word before __glink_PLTresolve
3053 else if (parameters
->options().output_is_position_independent())
3055 // There are two FDEs for a position independent glink.
3056 // The first covers the branch table, the second
3057 // __glink_PLTresolve at the end of glink.
3058 off_t resolve_size
= this->glink_
->pltresolve_size
;
3059 if (oview
[9] == elfcpp::DW_CFA_nop
)
3060 len
-= resolve_size
;
3063 address
+= len
- resolve_size
;
3070 // Must be a stub table.
3071 const Stub_table
<size
, big_endian
>* stub_table
3072 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3073 uint64_t stub_address
= stub_table
->stub_address();
3074 len
-= stub_address
- address
;
3075 address
= stub_address
;
3078 *paddress
= address
;
3082 // A class to handle the PLT data.
3084 template<int size
, bool big_endian
>
3085 class Output_data_plt_powerpc
: public Output_section_data_build
3088 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3089 size
, big_endian
> Reloc_section
;
3091 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3092 Reloc_section
* plt_rel
,
3094 : Output_section_data_build(size
== 32 ? 4 : 8),
3100 // Add an entry to the PLT.
3105 add_ifunc_entry(Symbol
*);
3108 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3110 // Return the .rela.plt section data.
3117 // Return the number of PLT entries.
3121 if (this->current_data_size() == 0)
3123 return ((this->current_data_size() - this->first_plt_entry_offset())
3124 / this->plt_entry_size());
3129 do_adjust_output_section(Output_section
* os
)
3134 // Write to a map file.
3136 do_print_to_mapfile(Mapfile
* mapfile
) const
3137 { mapfile
->print_output_data(this, this->name_
); }
3140 // Return the offset of the first non-reserved PLT entry.
3142 first_plt_entry_offset() const
3144 // IPLT has no reserved entry.
3145 if (this->name_
[3] == 'I')
3147 return this->targ_
->first_plt_entry_offset();
3150 // Return the size of each PLT entry.
3152 plt_entry_size() const
3154 return this->targ_
->plt_entry_size();
3157 // Write out the PLT data.
3159 do_write(Output_file
*);
3161 // The reloc section.
3162 Reloc_section
* rel_
;
3163 // Allows access to .glink for do_write.
3164 Target_powerpc
<size
, big_endian
>* targ_
;
3165 // What to report in map file.
3169 // Add an entry to the PLT.
3171 template<int size
, bool big_endian
>
3173 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3175 if (!gsym
->has_plt_offset())
3177 section_size_type off
= this->current_data_size();
3179 off
+= this->first_plt_entry_offset();
3180 gsym
->set_plt_offset(off
);
3181 gsym
->set_needs_dynsym_entry();
3182 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3183 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3184 off
+= this->plt_entry_size();
3185 this->set_current_data_size(off
);
3189 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3191 template<int size
, bool big_endian
>
3193 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3195 if (!gsym
->has_plt_offset())
3197 section_size_type off
= this->current_data_size();
3198 gsym
->set_plt_offset(off
);
3199 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3200 if (size
== 64 && this->targ_
->abiversion() < 2)
3201 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3202 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3203 off
+= this->plt_entry_size();
3204 this->set_current_data_size(off
);
3208 // Add an entry for a local ifunc symbol to the IPLT.
3210 template<int size
, bool big_endian
>
3212 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3213 Sized_relobj_file
<size
, big_endian
>* relobj
,
3214 unsigned int local_sym_index
)
3216 if (!relobj
->local_has_plt_offset(local_sym_index
))
3218 section_size_type off
= this->current_data_size();
3219 relobj
->set_local_plt_offset(local_sym_index
, off
);
3220 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3221 if (size
== 64 && this->targ_
->abiversion() < 2)
3222 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3223 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3225 off
+= this->plt_entry_size();
3226 this->set_current_data_size(off
);
3230 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3231 static const uint32_t add_2_2_11
= 0x7c425a14;
3232 static const uint32_t add_2_2_12
= 0x7c426214;
3233 static const uint32_t add_3_3_2
= 0x7c631214;
3234 static const uint32_t add_3_3_13
= 0x7c636a14;
3235 static const uint32_t add_11_0_11
= 0x7d605a14;
3236 static const uint32_t add_11_2_11
= 0x7d625a14;
3237 static const uint32_t add_11_11_2
= 0x7d6b1214;
3238 static const uint32_t addi_0_12
= 0x380c0000;
3239 static const uint32_t addi_2_2
= 0x38420000;
3240 static const uint32_t addi_3_3
= 0x38630000;
3241 static const uint32_t addi_11_11
= 0x396b0000;
3242 static const uint32_t addi_12_1
= 0x39810000;
3243 static const uint32_t addi_12_12
= 0x398c0000;
3244 static const uint32_t addis_0_2
= 0x3c020000;
3245 static const uint32_t addis_0_13
= 0x3c0d0000;
3246 static const uint32_t addis_2_12
= 0x3c4c0000;
3247 static const uint32_t addis_11_2
= 0x3d620000;
3248 static const uint32_t addis_11_11
= 0x3d6b0000;
3249 static const uint32_t addis_11_30
= 0x3d7e0000;
3250 static const uint32_t addis_12_1
= 0x3d810000;
3251 static const uint32_t addis_12_2
= 0x3d820000;
3252 static const uint32_t addis_12_12
= 0x3d8c0000;
3253 static const uint32_t b
= 0x48000000;
3254 static const uint32_t bcl_20_31
= 0x429f0005;
3255 static const uint32_t bctr
= 0x4e800420;
3256 static const uint32_t blr
= 0x4e800020;
3257 static const uint32_t bnectr_p4
= 0x4ce20420;
3258 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3259 static const uint32_t cmpldi_2_0
= 0x28220000;
3260 static const uint32_t cror_15_15_15
= 0x4def7b82;
3261 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3262 static const uint32_t ld_0_1
= 0xe8010000;
3263 static const uint32_t ld_0_12
= 0xe80c0000;
3264 static const uint32_t ld_2_1
= 0xe8410000;
3265 static const uint32_t ld_2_2
= 0xe8420000;
3266 static const uint32_t ld_2_11
= 0xe84b0000;
3267 static const uint32_t ld_2_12
= 0xe84c0000;
3268 static const uint32_t ld_11_2
= 0xe9620000;
3269 static const uint32_t ld_11_11
= 0xe96b0000;
3270 static const uint32_t ld_12_2
= 0xe9820000;
3271 static const uint32_t ld_12_11
= 0xe98b0000;
3272 static const uint32_t ld_12_12
= 0xe98c0000;
3273 static const uint32_t lfd_0_1
= 0xc8010000;
3274 static const uint32_t li_0_0
= 0x38000000;
3275 static const uint32_t li_12_0
= 0x39800000;
3276 static const uint32_t lis_0
= 0x3c000000;
3277 static const uint32_t lis_2
= 0x3c400000;
3278 static const uint32_t lis_11
= 0x3d600000;
3279 static const uint32_t lis_12
= 0x3d800000;
3280 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3281 static const uint32_t lwz_0_12
= 0x800c0000;
3282 static const uint32_t lwz_11_11
= 0x816b0000;
3283 static const uint32_t lwz_11_30
= 0x817e0000;
3284 static const uint32_t lwz_12_12
= 0x818c0000;
3285 static const uint32_t lwzu_0_12
= 0x840c0000;
3286 static const uint32_t mflr_0
= 0x7c0802a6;
3287 static const uint32_t mflr_11
= 0x7d6802a6;
3288 static const uint32_t mflr_12
= 0x7d8802a6;
3289 static const uint32_t mtctr_0
= 0x7c0903a6;
3290 static const uint32_t mtctr_11
= 0x7d6903a6;
3291 static const uint32_t mtctr_12
= 0x7d8903a6;
3292 static const uint32_t mtlr_0
= 0x7c0803a6;
3293 static const uint32_t mtlr_12
= 0x7d8803a6;
3294 static const uint32_t nop
= 0x60000000;
3295 static const uint32_t ori_0_0_0
= 0x60000000;
3296 static const uint32_t srdi_0_0_2
= 0x7800f082;
3297 static const uint32_t std_0_1
= 0xf8010000;
3298 static const uint32_t std_0_12
= 0xf80c0000;
3299 static const uint32_t std_2_1
= 0xf8410000;
3300 static const uint32_t stfd_0_1
= 0xd8010000;
3301 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3302 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3303 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3304 static const uint32_t xor_2_12_12
= 0x7d826278;
3305 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3307 // Write out the PLT.
3309 template<int size
, bool big_endian
>
3311 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3313 if (size
== 32 && this->name_
[3] != 'I')
3315 const section_size_type offset
= this->offset();
3316 const section_size_type oview_size
3317 = convert_to_section_size_type(this->data_size());
3318 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3319 unsigned char* pov
= oview
;
3320 unsigned char* endpov
= oview
+ oview_size
;
3322 // The address of the .glink branch table
3323 const Output_data_glink
<size
, big_endian
>* glink
3324 = this->targ_
->glink_section();
3325 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3327 while (pov
< endpov
)
3329 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3334 of
->write_output_view(offset
, oview_size
, oview
);
3338 // Create the PLT section.
3340 template<int size
, bool big_endian
>
3342 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3345 if (this->plt_
== NULL
)
3347 if (this->got_
== NULL
)
3348 this->got_section(symtab
, layout
);
3350 if (this->glink_
== NULL
)
3351 make_glink_section(layout
);
3353 // Ensure that .rela.dyn always appears before .rela.plt This is
3354 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3355 // needs to include .rela.plt in its range.
3356 this->rela_dyn_section(layout
);
3358 Reloc_section
* plt_rel
= new Reloc_section(false);
3359 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3360 elfcpp::SHF_ALLOC
, plt_rel
,
3361 ORDER_DYNAMIC_PLT_RELOCS
, false);
3363 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3365 layout
->add_output_section_data(".plt",
3367 ? elfcpp::SHT_PROGBITS
3368 : elfcpp::SHT_NOBITS
),
3369 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3378 // Create the IPLT section.
3380 template<int size
, bool big_endian
>
3382 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3385 if (this->iplt_
== NULL
)
3387 this->make_plt_section(symtab
, layout
);
3389 Reloc_section
* iplt_rel
= new Reloc_section(false);
3390 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3392 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3394 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3398 // A section for huge long branch addresses, similar to plt section.
3400 template<int size
, bool big_endian
>
3401 class Output_data_brlt_powerpc
: public Output_section_data_build
3404 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3405 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3406 size
, big_endian
> Reloc_section
;
3408 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3409 Reloc_section
* brlt_rel
)
3410 : Output_section_data_build(size
== 32 ? 4 : 8),
3418 this->reset_data_size();
3419 this->rel_
->reset_data_size();
3423 finalize_brlt_sizes()
3425 this->finalize_data_size();
3426 this->rel_
->finalize_data_size();
3429 // Add a reloc for an entry in the BRLT.
3431 add_reloc(Address to
, unsigned int off
)
3432 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3434 // Update section and reloc section size.
3436 set_current_size(unsigned int num_branches
)
3438 this->reset_address_and_file_offset();
3439 this->set_current_data_size(num_branches
* 16);
3440 this->finalize_data_size();
3441 Output_section
* os
= this->output_section();
3442 os
->set_section_offsets_need_adjustment();
3443 if (this->rel_
!= NULL
)
3445 unsigned int reloc_size
3446 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3447 this->rel_
->reset_address_and_file_offset();
3448 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3449 this->rel_
->finalize_data_size();
3450 Output_section
* os
= this->rel_
->output_section();
3451 os
->set_section_offsets_need_adjustment();
3457 do_adjust_output_section(Output_section
* os
)
3462 // Write to a map file.
3464 do_print_to_mapfile(Mapfile
* mapfile
) const
3465 { mapfile
->print_output_data(this, "** BRLT"); }
3468 // Write out the BRLT data.
3470 do_write(Output_file
*);
3472 // The reloc section.
3473 Reloc_section
* rel_
;
3474 Target_powerpc
<size
, big_endian
>* targ_
;
3477 // Make the branch lookup table section.
3479 template<int size
, bool big_endian
>
3481 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3483 if (size
== 64 && this->brlt_section_
== NULL
)
3485 Reloc_section
* brlt_rel
= NULL
;
3486 bool is_pic
= parameters
->options().output_is_position_independent();
3489 // When PIC we can't fill in .branch_lt (like .plt it can be
3490 // a bss style section) but must initialise at runtime via
3491 // dynamic relocats.
3492 this->rela_dyn_section(layout
);
3493 brlt_rel
= new Reloc_section(false);
3494 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3497 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3498 if (this->plt_
&& is_pic
)
3499 this->plt_
->output_section()
3500 ->add_output_section_data(this->brlt_section_
);
3502 layout
->add_output_section_data(".branch_lt",
3503 (is_pic
? elfcpp::SHT_NOBITS
3504 : elfcpp::SHT_PROGBITS
),
3505 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3506 this->brlt_section_
,
3507 (is_pic
? ORDER_SMALL_BSS
3508 : ORDER_SMALL_DATA
),
3513 // Write out .branch_lt when non-PIC.
3515 template<int size
, bool big_endian
>
3517 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3519 if (size
== 64 && !parameters
->options().output_is_position_independent())
3521 const section_size_type offset
= this->offset();
3522 const section_size_type oview_size
3523 = convert_to_section_size_type(this->data_size());
3524 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3526 this->targ_
->write_branch_lookup_table(oview
);
3527 of
->write_output_view(offset
, oview_size
, oview
);
3531 static inline uint32_t
3537 static inline uint32_t
3543 static inline uint32_t
3546 return hi(a
+ 0x8000);
3552 static const unsigned char eh_frame_cie
[12];
3556 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3559 'z', 'R', 0, // Augmentation string.
3560 4, // Code alignment.
3561 0x80 - size
/ 8 , // Data alignment.
3563 1, // Augmentation size.
3564 (elfcpp::DW_EH_PE_pcrel
3565 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3566 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3569 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3570 static const unsigned char glink_eh_frame_fde_64v1
[] =
3572 0, 0, 0, 0, // Replaced with offset to .glink.
3573 0, 0, 0, 0, // Replaced with size of .glink.
3574 0, // Augmentation size.
3575 elfcpp::DW_CFA_advance_loc
+ 1,
3576 elfcpp::DW_CFA_register
, 65, 12,
3577 elfcpp::DW_CFA_advance_loc
+ 4,
3578 elfcpp::DW_CFA_restore_extended
, 65
3581 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3582 static const unsigned char glink_eh_frame_fde_64v2
[] =
3584 0, 0, 0, 0, // Replaced with offset to .glink.
3585 0, 0, 0, 0, // Replaced with size of .glink.
3586 0, // Augmentation size.
3587 elfcpp::DW_CFA_advance_loc
+ 1,
3588 elfcpp::DW_CFA_register
, 65, 0,
3589 elfcpp::DW_CFA_advance_loc
+ 4,
3590 elfcpp::DW_CFA_restore_extended
, 65
3593 // Describe __glink_PLTresolve use of LR, 32-bit version.
3594 static const unsigned char glink_eh_frame_fde_32
[] =
3596 0, 0, 0, 0, // Replaced with offset to .glink.
3597 0, 0, 0, 0, // Replaced with size of .glink.
3598 0, // Augmentation size.
3599 elfcpp::DW_CFA_advance_loc
+ 2,
3600 elfcpp::DW_CFA_register
, 65, 0,
3601 elfcpp::DW_CFA_advance_loc
+ 4,
3602 elfcpp::DW_CFA_restore_extended
, 65
3605 static const unsigned char default_fde
[] =
3607 0, 0, 0, 0, // Replaced with offset to stubs.
3608 0, 0, 0, 0, // Replaced with size of stubs.
3609 0, // Augmentation size.
3610 elfcpp::DW_CFA_nop
, // Pad.
3615 template<bool big_endian
>
3617 write_insn(unsigned char* p
, uint32_t v
)
3619 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3622 // Stub_table holds information about plt and long branch stubs.
3623 // Stubs are built in an area following some input section determined
3624 // by group_sections(). This input section is converted to a relaxed
3625 // input section allowing it to be resized to accommodate the stubs
3627 template<int size
, bool big_endian
>
3628 class Stub_table
: public Output_relaxed_input_section
3631 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3632 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3634 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3635 Output_section
* output_section
,
3636 const Output_section::Input_section
* owner
)
3637 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3639 ->section_addralign(owner
->shndx())),
3640 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3641 orig_data_size_(owner
->current_data_size()),
3642 plt_size_(0), last_plt_size_(0),
3643 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
3644 eh_frame_added_(false), need_save_res_(false)
3646 this->set_output_section(output_section
);
3648 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3649 new_relaxed
.push_back(this);
3650 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3653 // Add a plt call stub.
3655 add_plt_call_entry(Address
,
3656 const Sized_relobj_file
<size
, big_endian
>*,
3662 add_plt_call_entry(Address
,
3663 const Sized_relobj_file
<size
, big_endian
>*,
3668 // Find a given plt call stub.
3670 find_plt_call_entry(const Symbol
*) const;
3673 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3674 unsigned int) const;
3677 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3683 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3688 // Add a long branch stub.
3690 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3691 unsigned int, Address
, Address
, bool);
3694 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3698 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3700 Address max_branch_offset
= max_branch_delta(r_type
);
3701 if (max_branch_offset
== 0)
3703 gold_assert(from
!= invalid_address
);
3704 Address loc
= off
+ this->stub_address();
3705 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3709 clear_stubs(bool all
)
3711 this->plt_call_stubs_
.clear();
3712 this->plt_size_
= 0;
3713 this->long_branch_stubs_
.clear();
3714 this->branch_size_
= 0;
3715 this->need_save_res_
= false;
3718 this->last_plt_size_
= 0;
3719 this->last_branch_size_
= 0;
3724 set_address_and_size(const Output_section
* os
, Address off
)
3726 Address start_off
= off
;
3727 off
+= this->orig_data_size_
;
3728 Address my_size
= this->plt_size_
+ this->branch_size_
;
3729 if (this->need_save_res_
)
3730 my_size
+= this->targ_
->savres_section()->data_size();
3732 off
= align_address(off
, this->stub_align());
3733 // Include original section size and alignment padding in size
3734 my_size
+= off
- start_off
;
3735 // Ensure new size is always larger than min size
3736 // threshold. Alignment requirement is included in "my_size", so
3737 // increase "my_size" does not invalidate alignment.
3738 if (my_size
< this->min_size_threshold_
)
3739 my_size
= this->min_size_threshold_
;
3740 this->reset_address_and_file_offset();
3741 this->set_current_data_size(my_size
);
3742 this->set_address_and_file_offset(os
->address() + start_off
,
3743 os
->offset() + start_off
);
3748 stub_address() const
3750 return align_address(this->address() + this->orig_data_size_
,
3751 this->stub_align());
3757 return align_address(this->offset() + this->orig_data_size_
,
3758 this->stub_align());
3763 { return this->plt_size_
; }
3765 void set_min_size_threshold(Address min_size
)
3766 { this->min_size_threshold_
= min_size
; }
3771 Output_section
* os
= this->output_section();
3772 if (os
->addralign() < this->stub_align())
3774 os
->set_addralign(this->stub_align());
3775 // FIXME: get rid of the insane checkpointing.
3776 // We can't increase alignment of the input section to which
3777 // stubs are attached; The input section may be .init which
3778 // is pasted together with other .init sections to form a
3779 // function. Aligning might insert zero padding resulting in
3780 // sigill. However we do need to increase alignment of the
3781 // output section so that the align_address() on offset in
3782 // set_address_and_size() adds the same padding as the
3783 // align_address() on address in stub_address().
3784 // What's more, we need this alignment for the layout done in
3785 // relaxation_loop_body() so that the output section starts at
3786 // a suitably aligned address.
3787 os
->checkpoint_set_addralign(this->stub_align());
3789 if (this->last_plt_size_
!= this->plt_size_
3790 || this->last_branch_size_
!= this->branch_size_
)
3792 this->last_plt_size_
= this->plt_size_
;
3793 this->last_branch_size_
= this->branch_size_
;
3799 // Add .eh_frame info for this stub section. Unlike other linker
3800 // generated .eh_frame this is added late in the link, because we
3801 // only want the .eh_frame info if this particular stub section is
3804 add_eh_frame(Layout
* layout
)
3806 if (!this->eh_frame_added_
)
3808 if (!parameters
->options().ld_generated_unwind_info())
3811 // Since we add stub .eh_frame info late, it must be placed
3812 // after all other linker generated .eh_frame info so that
3813 // merge mapping need not be updated for input sections.
3814 // There is no provision to use a different CIE to that used
3816 if (!this->targ_
->has_glink())
3819 layout
->add_eh_frame_for_plt(this,
3820 Eh_cie
<size
>::eh_frame_cie
,
3821 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3823 sizeof (default_fde
));
3824 this->eh_frame_added_
= true;
3828 Target_powerpc
<size
, big_endian
>*
3834 class Plt_stub_ent_hash
;
3835 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3836 Plt_stub_ent_hash
> Plt_stub_entries
;
3838 // Alignment of stub section.
3844 unsigned int min_align
= 32;
3845 unsigned int user_align
= 1 << parameters
->options().plt_align();
3846 return std::max(user_align
, min_align
);
3849 // Return the plt offset for the given call stub.
3851 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3853 const Symbol
* gsym
= p
->first
.sym_
;
3856 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3857 && gsym
->can_use_relative_reloc(false));
3858 return gsym
->plt_offset();
3863 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3864 unsigned int local_sym_index
= p
->first
.locsym_
;
3865 return relobj
->local_plt_offset(local_sym_index
);
3869 // Size of a given plt call stub.
3871 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3877 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3879 plt_addr
+= this->targ_
->iplt_section()->address();
3881 plt_addr
+= this->targ_
->plt_section()->address();
3882 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3883 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3884 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3885 got_addr
+= ppcobj
->toc_base_offset();
3886 Address off
= plt_addr
- got_addr
;
3887 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3888 if (this->targ_
->abiversion() < 2)
3890 bool static_chain
= parameters
->options().plt_static_chain();
3891 bool thread_safe
= this->targ_
->plt_thread_safe();
3895 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3897 unsigned int align
= 1 << parameters
->options().plt_align();
3899 bytes
= (bytes
+ align
- 1) & -align
;
3903 // Return long branch stub size.
3905 branch_stub_size(Address to
)
3908 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3909 if (to
- loc
+ (1 << 25) < 2 << 25)
3911 if (size
== 64 || !parameters
->options().output_is_position_independent())
3918 do_write(Output_file
*);
3920 // Plt call stub keys.
3924 Plt_stub_ent(const Symbol
* sym
)
3925 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3928 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3929 unsigned int locsym_index
)
3930 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3933 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3935 unsigned int r_type
,
3937 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3940 this->addend_
= addend
;
3941 else if (parameters
->options().output_is_position_independent()
3942 && r_type
== elfcpp::R_PPC_PLTREL24
)
3944 this->addend_
= addend
;
3945 if (this->addend_
>= 32768)
3946 this->object_
= object
;
3950 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3951 unsigned int locsym_index
,
3952 unsigned int r_type
,
3954 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3957 this->addend_
= addend
;
3958 else if (parameters
->options().output_is_position_independent()
3959 && r_type
== elfcpp::R_PPC_PLTREL24
)
3960 this->addend_
= addend
;
3963 bool operator==(const Plt_stub_ent
& that
) const
3965 return (this->sym_
== that
.sym_
3966 && this->object_
== that
.object_
3967 && this->addend_
== that
.addend_
3968 && this->locsym_
== that
.locsym_
);
3972 const Sized_relobj_file
<size
, big_endian
>* object_
;
3973 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3974 unsigned int locsym_
;
3977 class Plt_stub_ent_hash
3980 size_t operator()(const Plt_stub_ent
& ent
) const
3982 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3983 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3989 // Long branch stub keys.
3990 class Branch_stub_ent
3993 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
3994 Address to
, bool save_res
)
3995 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
3998 toc_base_off_
= obj
->toc_base_offset();
4001 bool operator==(const Branch_stub_ent
& that
) const
4003 return (this->dest_
== that
.dest_
4005 || this->toc_base_off_
== that
.toc_base_off_
));
4009 unsigned int toc_base_off_
;
4013 class Branch_stub_ent_hash
4016 size_t operator()(const Branch_stub_ent
& ent
) const
4017 { return ent
.dest_
^ ent
.toc_base_off_
; }
4020 // In a sane world this would be a global.
4021 Target_powerpc
<size
, big_endian
>* targ_
;
4022 // Map sym/object/addend to stub offset.
4023 Plt_stub_entries plt_call_stubs_
;
4024 // Map destination address to stub offset.
4025 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4026 Branch_stub_ent_hash
> Branch_stub_entries
;
4027 Branch_stub_entries long_branch_stubs_
;
4028 // size of input section
4029 section_size_type orig_data_size_
;
4031 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4032 // Some rare cases cause (PR/20529) fluctuation in stub table
4033 // size, which leads to an endless relax loop. This is to be fixed
4034 // by, after the first few iterations, allowing only increase of
4035 // stub table size. This variable sets the minimal possible size of
4036 // a stub table, it is zero for the first few iterations, then
4037 // increases monotonically.
4038 Address min_size_threshold_
;
4039 // Whether .eh_frame info has been created for this stub section.
4040 bool eh_frame_added_
;
4041 // Set if this stub group needs a copy of out-of-line register
4042 // save/restore functions.
4043 bool need_save_res_
;
4046 // Add a plt call stub, if we do not already have one for this
4047 // sym/object/addend combo.
4049 template<int size
, bool big_endian
>
4051 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4053 const Sized_relobj_file
<size
, big_endian
>* object
,
4055 unsigned int r_type
,
4058 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4059 unsigned int off
= this->plt_size_
;
4060 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4061 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4063 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4064 return this->can_reach_stub(from
, off
, r_type
);
4067 template<int size
, bool big_endian
>
4069 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4071 const Sized_relobj_file
<size
, big_endian
>* object
,
4072 unsigned int locsym_index
,
4073 unsigned int r_type
,
4076 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4077 unsigned int off
= this->plt_size_
;
4078 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4079 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
4081 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
4082 return this->can_reach_stub(from
, off
, r_type
);
4085 // Find a plt call stub.
4087 template<int size
, bool big_endian
>
4088 typename Stub_table
<size
, big_endian
>::Address
4089 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4090 const Sized_relobj_file
<size
, big_endian
>* object
,
4092 unsigned int r_type
,
4093 Address addend
) const
4095 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4096 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4097 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4100 template<int size
, bool big_endian
>
4101 typename Stub_table
<size
, big_endian
>::Address
4102 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4104 Plt_stub_ent
ent(gsym
);
4105 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4106 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4109 template<int size
, bool big_endian
>
4110 typename Stub_table
<size
, big_endian
>::Address
4111 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4112 const Sized_relobj_file
<size
, big_endian
>* object
,
4113 unsigned int locsym_index
,
4114 unsigned int r_type
,
4115 Address addend
) const
4117 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4118 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4119 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4122 template<int size
, bool big_endian
>
4123 typename Stub_table
<size
, big_endian
>::Address
4124 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4125 const Sized_relobj_file
<size
, big_endian
>* object
,
4126 unsigned int locsym_index
) const
4128 Plt_stub_ent
ent(object
, locsym_index
);
4129 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4130 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4133 // Add a long branch stub if we don't already have one to given
4136 template<int size
, bool big_endian
>
4138 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4139 const Powerpc_relobj
<size
, big_endian
>* object
,
4140 unsigned int r_type
,
4145 Branch_stub_ent
ent(object
, to
, save_res
);
4146 Address off
= this->branch_size_
;
4147 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4150 this->need_save_res_
= true;
4153 unsigned int stub_size
= this->branch_stub_size(to
);
4154 this->branch_size_
= off
+ stub_size
;
4155 if (size
== 64 && stub_size
!= 4)
4156 this->targ_
->add_branch_lookup_table(to
);
4159 return this->can_reach_stub(from
, off
, r_type
);
4162 // Find long branch stub offset.
4164 template<int size
, bool big_endian
>
4165 typename Stub_table
<size
, big_endian
>::Address
4166 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4167 const Powerpc_relobj
<size
, big_endian
>* object
,
4170 Branch_stub_ent
ent(object
, to
, false);
4171 typename
Branch_stub_entries::const_iterator p
4172 = this->long_branch_stubs_
.find(ent
);
4173 if (p
== this->long_branch_stubs_
.end())
4174 return invalid_address
;
4175 if (p
->first
.save_res_
)
4176 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4180 // A class to handle .glink.
4182 template<int size
, bool big_endian
>
4183 class Output_data_glink
: public Output_section_data
4186 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4187 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4188 static const int pltresolve_size
= 16*4;
4190 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4191 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4192 end_branch_table_(), ge_size_(0)
4196 add_eh_frame(Layout
* layout
);
4199 add_global_entry(const Symbol
*);
4202 find_global_entry(const Symbol
*) const;
4205 global_entry_address() const
4207 gold_assert(this->is_data_size_valid());
4208 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4209 return this->address() + global_entry_off
;
4213 // Write to a map file.
4215 do_print_to_mapfile(Mapfile
* mapfile
) const
4216 { mapfile
->print_output_data(this, _("** glink")); }
4220 set_final_data_size();
4224 do_write(Output_file
*);
4226 // Allows access to .got and .plt for do_write.
4227 Target_powerpc
<size
, big_endian
>* targ_
;
4229 // Map sym to stub offset.
4230 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4231 Global_entry_stub_entries global_entry_stubs_
;
4233 unsigned int end_branch_table_
, ge_size_
;
4236 template<int size
, bool big_endian
>
4238 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4240 if (!parameters
->options().ld_generated_unwind_info())
4245 if (this->targ_
->abiversion() < 2)
4246 layout
->add_eh_frame_for_plt(this,
4247 Eh_cie
<64>::eh_frame_cie
,
4248 sizeof (Eh_cie
<64>::eh_frame_cie
),
4249 glink_eh_frame_fde_64v1
,
4250 sizeof (glink_eh_frame_fde_64v1
));
4252 layout
->add_eh_frame_for_plt(this,
4253 Eh_cie
<64>::eh_frame_cie
,
4254 sizeof (Eh_cie
<64>::eh_frame_cie
),
4255 glink_eh_frame_fde_64v2
,
4256 sizeof (glink_eh_frame_fde_64v2
));
4260 // 32-bit .glink can use the default since the CIE return
4261 // address reg, LR, is valid.
4262 layout
->add_eh_frame_for_plt(this,
4263 Eh_cie
<32>::eh_frame_cie
,
4264 sizeof (Eh_cie
<32>::eh_frame_cie
),
4266 sizeof (default_fde
));
4267 // Except where LR is used in a PIC __glink_PLTresolve.
4268 if (parameters
->options().output_is_position_independent())
4269 layout
->add_eh_frame_for_plt(this,
4270 Eh_cie
<32>::eh_frame_cie
,
4271 sizeof (Eh_cie
<32>::eh_frame_cie
),
4272 glink_eh_frame_fde_32
,
4273 sizeof (glink_eh_frame_fde_32
));
4277 template<int size
, bool big_endian
>
4279 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4281 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4282 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4284 this->ge_size_
+= 16;
4287 template<int size
, bool big_endian
>
4288 typename Output_data_glink
<size
, big_endian
>::Address
4289 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4291 typename
Global_entry_stub_entries::const_iterator p
4292 = this->global_entry_stubs_
.find(gsym
);
4293 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4296 template<int size
, bool big_endian
>
4298 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4300 unsigned int count
= this->targ_
->plt_entry_count();
4301 section_size_type total
= 0;
4307 // space for branch table
4308 total
+= 4 * (count
- 1);
4310 total
+= -total
& 15;
4311 total
+= this->pltresolve_size
;
4315 total
+= this->pltresolve_size
;
4317 // space for branch table
4319 if (this->targ_
->abiversion() < 2)
4323 total
+= 4 * (count
- 0x8000);
4327 this->end_branch_table_
= total
;
4328 total
= (total
+ 15) & -16;
4329 total
+= this->ge_size_
;
4331 this->set_data_size(total
);
4334 // Write out plt and long branch stub code.
4336 template<int size
, bool big_endian
>
4338 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4340 if (this->plt_call_stubs_
.empty()
4341 && this->long_branch_stubs_
.empty())
4344 const section_size_type start_off
= this->offset();
4345 const section_size_type off
= this->stub_offset();
4346 const section_size_type oview_size
=
4347 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4348 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4353 const Output_data_got_powerpc
<size
, big_endian
>* got
4354 = this->targ_
->got_section();
4355 Address got_os_addr
= got
->output_section()->address();
4357 if (!this->plt_call_stubs_
.empty())
4359 // The base address of the .plt section.
4360 Address plt_base
= this->targ_
->plt_section()->address();
4361 Address iplt_base
= invalid_address
;
4363 // Write out plt call stubs.
4364 typename
Plt_stub_entries::const_iterator cs
;
4365 for (cs
= this->plt_call_stubs_
.begin();
4366 cs
!= this->plt_call_stubs_
.end();
4370 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4371 Address plt_addr
= pltoff
;
4374 if (iplt_base
== invalid_address
)
4375 iplt_base
= this->targ_
->iplt_section()->address();
4376 plt_addr
+= iplt_base
;
4379 plt_addr
+= plt_base
;
4380 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4381 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4382 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4383 Address off
= plt_addr
- got_addr
;
4385 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4386 gold_error(_("%s: linkage table error against `%s'"),
4387 cs
->first
.object_
->name().c_str(),
4388 cs
->first
.sym_
->demangled_name().c_str());
4390 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4392 = plt_load_toc
&& parameters
->options().plt_static_chain();
4394 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4395 bool use_fake_dep
= false;
4396 Address cmp_branch_off
= 0;
4399 unsigned int pltindex
4400 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4401 / this->targ_
->plt_entry_size());
4403 = (this->targ_
->glink_section()->pltresolve_size
4405 if (pltindex
> 32768)
4406 glinkoff
+= (pltindex
- 32768) * 4;
4408 = this->targ_
->glink_section()->address() + glinkoff
;
4410 = (this->stub_address() + cs
->second
+ 24
4411 + 4 * (ha(off
) != 0)
4412 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4413 + 4 * static_chain
);
4414 cmp_branch_off
= to
- from
;
4415 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4418 p
= oview
+ cs
->second
;
4421 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4425 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4427 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4432 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4434 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4438 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4440 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4444 write_insn
<big_endian
>(p
, mtctr_12
);
4450 write_insn
<big_endian
>(p
, xor_2_12_12
);
4452 write_insn
<big_endian
>(p
, add_11_11_2
);
4455 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4459 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4466 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4468 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4471 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4473 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4477 write_insn
<big_endian
>(p
, mtctr_12
);
4483 write_insn
<big_endian
>(p
, xor_11_12_12
);
4485 write_insn
<big_endian
>(p
, add_2_2_11
);
4490 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4493 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4497 if (thread_safe
&& !use_fake_dep
)
4499 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4501 write_insn
<big_endian
>(p
, bnectr_p4
);
4503 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4506 write_insn
<big_endian
>(p
, bctr
);
4510 // Write out long branch stubs.
4511 typename
Branch_stub_entries::const_iterator bs
;
4512 for (bs
= this->long_branch_stubs_
.begin();
4513 bs
!= this->long_branch_stubs_
.end();
4516 if (bs
->first
.save_res_
)
4518 p
= oview
+ this->plt_size_
+ bs
->second
;
4519 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4520 Address delta
= bs
->first
.dest_
- loc
;
4521 if (delta
+ (1 << 25) < 2 << 25)
4522 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4526 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4527 gold_assert(brlt_addr
!= invalid_address
);
4528 brlt_addr
+= this->targ_
->brlt_section()->address();
4529 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4530 Address brltoff
= brlt_addr
- got_addr
;
4531 if (ha(brltoff
) == 0)
4533 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4537 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4538 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4540 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4541 write_insn
<big_endian
>(p
, bctr
);
4547 if (!this->plt_call_stubs_
.empty())
4549 // The base address of the .plt section.
4550 Address plt_base
= this->targ_
->plt_section()->address();
4551 Address iplt_base
= invalid_address
;
4552 // The address of _GLOBAL_OFFSET_TABLE_.
4553 Address g_o_t
= invalid_address
;
4555 // Write out plt call stubs.
4556 typename
Plt_stub_entries::const_iterator cs
;
4557 for (cs
= this->plt_call_stubs_
.begin();
4558 cs
!= this->plt_call_stubs_
.end();
4562 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4565 if (iplt_base
== invalid_address
)
4566 iplt_base
= this->targ_
->iplt_section()->address();
4567 plt_addr
+= iplt_base
;
4570 plt_addr
+= plt_base
;
4572 p
= oview
+ cs
->second
;
4573 if (parameters
->options().output_is_position_independent())
4576 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4577 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4578 (cs
->first
.object_
));
4579 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4581 unsigned int got2
= ppcobj
->got2_shndx();
4582 got_addr
= ppcobj
->get_output_section_offset(got2
);
4583 gold_assert(got_addr
!= invalid_address
);
4584 got_addr
+= (ppcobj
->output_section(got2
)->address()
4585 + cs
->first
.addend_
);
4589 if (g_o_t
== invalid_address
)
4591 const Output_data_got_powerpc
<size
, big_endian
>* got
4592 = this->targ_
->got_section();
4593 g_o_t
= got
->address() + got
->g_o_t();
4598 Address off
= plt_addr
- got_addr
;
4601 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4602 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4603 write_insn
<big_endian
>(p
+ 8, bctr
);
4607 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4608 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4609 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4610 write_insn
<big_endian
>(p
+ 12, bctr
);
4615 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4616 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4617 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4618 write_insn
<big_endian
>(p
+ 12, bctr
);
4623 // Write out long branch stubs.
4624 typename
Branch_stub_entries::const_iterator bs
;
4625 for (bs
= this->long_branch_stubs_
.begin();
4626 bs
!= this->long_branch_stubs_
.end();
4629 if (bs
->first
.save_res_
)
4631 p
= oview
+ this->plt_size_
+ bs
->second
;
4632 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4633 Address delta
= bs
->first
.dest_
- loc
;
4634 if (delta
+ (1 << 25) < 2 << 25)
4635 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4636 else if (!parameters
->options().output_is_position_independent())
4638 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4639 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4640 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4641 write_insn
<big_endian
>(p
+ 12, bctr
);
4646 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4647 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4648 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4649 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4650 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4651 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4652 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4653 write_insn
<big_endian
>(p
+ 28, bctr
);
4657 if (this->need_save_res_
)
4659 p
= oview
+ this->plt_size_
+ this->branch_size_
;
4660 memcpy (p
, this->targ_
->savres_section()->contents(),
4661 this->targ_
->savres_section()->data_size());
4665 // Write out .glink.
4667 template<int size
, bool big_endian
>
4669 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4671 const section_size_type off
= this->offset();
4672 const section_size_type oview_size
=
4673 convert_to_section_size_type(this->data_size());
4674 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4677 // The base address of the .plt section.
4678 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4679 Address plt_base
= this->targ_
->plt_section()->address();
4683 if (this->end_branch_table_
!= 0)
4685 // Write pltresolve stub.
4687 Address after_bcl
= this->address() + 16;
4688 Address pltoff
= plt_base
- after_bcl
;
4690 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4692 if (this->targ_
->abiversion() < 2)
4694 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4695 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4696 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4697 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4698 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4699 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4700 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4701 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4702 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4703 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4707 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4708 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4709 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4710 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4711 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4712 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4713 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4714 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4715 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4716 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4717 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4718 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4720 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4721 while (p
< oview
+ this->pltresolve_size
)
4722 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4724 // Write lazy link call stubs.
4726 while (p
< oview
+ this->end_branch_table_
)
4728 if (this->targ_
->abiversion() < 2)
4732 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4736 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4737 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4740 uint32_t branch_off
= 8 - (p
- oview
);
4741 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4746 Address plt_base
= this->targ_
->plt_section()->address();
4747 Address iplt_base
= invalid_address
;
4748 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4749 Address global_entry_base
= this->address() + global_entry_off
;
4750 typename
Global_entry_stub_entries::const_iterator ge
;
4751 for (ge
= this->global_entry_stubs_
.begin();
4752 ge
!= this->global_entry_stubs_
.end();
4755 p
= oview
+ global_entry_off
+ ge
->second
;
4756 Address plt_addr
= ge
->first
->plt_offset();
4757 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4758 && ge
->first
->can_use_relative_reloc(false))
4760 if (iplt_base
== invalid_address
)
4761 iplt_base
= this->targ_
->iplt_section()->address();
4762 plt_addr
+= iplt_base
;
4765 plt_addr
+= plt_base
;
4766 Address my_addr
= global_entry_base
+ ge
->second
;
4767 Address off
= plt_addr
- my_addr
;
4769 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4770 gold_error(_("%s: linkage table error against `%s'"),
4771 ge
->first
->object()->name().c_str(),
4772 ge
->first
->demangled_name().c_str());
4774 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4775 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4776 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4777 write_insn
<big_endian
>(p
, bctr
);
4782 const Output_data_got_powerpc
<size
, big_endian
>* got
4783 = this->targ_
->got_section();
4784 // The address of _GLOBAL_OFFSET_TABLE_.
4785 Address g_o_t
= got
->address() + got
->g_o_t();
4787 // Write out pltresolve branch table.
4789 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4790 unsigned char* end_p
= oview
+ the_end
;
4791 while (p
< end_p
- 8 * 4)
4792 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4794 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4796 // Write out pltresolve call stub.
4797 if (parameters
->options().output_is_position_independent())
4799 Address res0_off
= 0;
4800 Address after_bcl_off
= the_end
+ 12;
4801 Address bcl_res0
= after_bcl_off
- res0_off
;
4803 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4804 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4805 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4806 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4807 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4808 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4809 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4811 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4813 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4814 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4816 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4817 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4821 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4822 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4824 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4825 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4826 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4827 write_insn
<big_endian
>(p
+ 52, bctr
);
4828 write_insn
<big_endian
>(p
+ 56, nop
);
4829 write_insn
<big_endian
>(p
+ 60, nop
);
4833 Address res0
= this->address();
4835 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4836 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4837 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4838 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4840 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4841 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4842 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4843 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4844 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4845 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4847 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4848 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4849 write_insn
<big_endian
>(p
+ 32, bctr
);
4850 write_insn
<big_endian
>(p
+ 36, nop
);
4851 write_insn
<big_endian
>(p
+ 40, nop
);
4852 write_insn
<big_endian
>(p
+ 44, nop
);
4853 write_insn
<big_endian
>(p
+ 48, nop
);
4854 write_insn
<big_endian
>(p
+ 52, nop
);
4855 write_insn
<big_endian
>(p
+ 56, nop
);
4856 write_insn
<big_endian
>(p
+ 60, nop
);
4861 of
->write_output_view(off
, oview_size
, oview
);
4865 // A class to handle linker generated save/restore functions.
4867 template<int size
, bool big_endian
>
4868 class Output_data_save_res
: public Output_section_data_build
4871 Output_data_save_res(Symbol_table
* symtab
);
4873 const unsigned char*
4880 // Write to a map file.
4882 do_print_to_mapfile(Mapfile
* mapfile
) const
4883 { mapfile
->print_output_data(this, _("** save/restore")); }
4886 do_write(Output_file
*);
4889 // The maximum size of save/restore contents.
4890 static const unsigned int savres_max
= 218*4;
4893 savres_define(Symbol_table
* symtab
,
4895 unsigned int lo
, unsigned int hi
,
4896 unsigned char* write_ent(unsigned char*, int),
4897 unsigned char* write_tail(unsigned char*, int));
4899 unsigned char *contents_
;
4902 template<bool big_endian
>
4903 static unsigned char*
4904 savegpr0(unsigned char* p
, int r
)
4906 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4907 write_insn
<big_endian
>(p
, insn
);
4911 template<bool big_endian
>
4912 static unsigned char*
4913 savegpr0_tail(unsigned char* p
, int r
)
4915 p
= savegpr0
<big_endian
>(p
, r
);
4916 uint32_t insn
= std_0_1
+ 16;
4917 write_insn
<big_endian
>(p
, insn
);
4919 write_insn
<big_endian
>(p
, blr
);
4923 template<bool big_endian
>
4924 static unsigned char*
4925 restgpr0(unsigned char* p
, int r
)
4927 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4928 write_insn
<big_endian
>(p
, insn
);
4932 template<bool big_endian
>
4933 static unsigned char*
4934 restgpr0_tail(unsigned char* p
, int r
)
4936 uint32_t insn
= ld_0_1
+ 16;
4937 write_insn
<big_endian
>(p
, insn
);
4939 p
= restgpr0
<big_endian
>(p
, r
);
4940 write_insn
<big_endian
>(p
, mtlr_0
);
4944 p
= restgpr0
<big_endian
>(p
, 30);
4945 p
= restgpr0
<big_endian
>(p
, 31);
4947 write_insn
<big_endian
>(p
, blr
);
4951 template<bool big_endian
>
4952 static unsigned char*
4953 savegpr1(unsigned char* p
, int r
)
4955 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4956 write_insn
<big_endian
>(p
, insn
);
4960 template<bool big_endian
>
4961 static unsigned char*
4962 savegpr1_tail(unsigned char* p
, int r
)
4964 p
= savegpr1
<big_endian
>(p
, r
);
4965 write_insn
<big_endian
>(p
, blr
);
4969 template<bool big_endian
>
4970 static unsigned char*
4971 restgpr1(unsigned char* p
, int r
)
4973 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4974 write_insn
<big_endian
>(p
, insn
);
4978 template<bool big_endian
>
4979 static unsigned char*
4980 restgpr1_tail(unsigned char* p
, int r
)
4982 p
= restgpr1
<big_endian
>(p
, r
);
4983 write_insn
<big_endian
>(p
, blr
);
4987 template<bool big_endian
>
4988 static unsigned char*
4989 savefpr(unsigned char* p
, int r
)
4991 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4992 write_insn
<big_endian
>(p
, insn
);
4996 template<bool big_endian
>
4997 static unsigned char*
4998 savefpr0_tail(unsigned char* p
, int r
)
5000 p
= savefpr
<big_endian
>(p
, r
);
5001 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5003 write_insn
<big_endian
>(p
, blr
);
5007 template<bool big_endian
>
5008 static unsigned char*
5009 restfpr(unsigned char* p
, int r
)
5011 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5012 write_insn
<big_endian
>(p
, insn
);
5016 template<bool big_endian
>
5017 static unsigned char*
5018 restfpr0_tail(unsigned char* p
, int r
)
5020 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5022 p
= restfpr
<big_endian
>(p
, r
);
5023 write_insn
<big_endian
>(p
, mtlr_0
);
5027 p
= restfpr
<big_endian
>(p
, 30);
5028 p
= restfpr
<big_endian
>(p
, 31);
5030 write_insn
<big_endian
>(p
, blr
);
5034 template<bool big_endian
>
5035 static unsigned char*
5036 savefpr1_tail(unsigned char* p
, int r
)
5038 p
= savefpr
<big_endian
>(p
, r
);
5039 write_insn
<big_endian
>(p
, blr
);
5043 template<bool big_endian
>
5044 static unsigned char*
5045 restfpr1_tail(unsigned char* p
, int r
)
5047 p
= restfpr
<big_endian
>(p
, r
);
5048 write_insn
<big_endian
>(p
, blr
);
5052 template<bool big_endian
>
5053 static unsigned char*
5054 savevr(unsigned char* p
, int r
)
5056 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5057 write_insn
<big_endian
>(p
, insn
);
5059 insn
= stvx_0_12_0
+ (r
<< 21);
5060 write_insn
<big_endian
>(p
, insn
);
5064 template<bool big_endian
>
5065 static unsigned char*
5066 savevr_tail(unsigned char* p
, int r
)
5068 p
= savevr
<big_endian
>(p
, r
);
5069 write_insn
<big_endian
>(p
, blr
);
5073 template<bool big_endian
>
5074 static unsigned char*
5075 restvr(unsigned char* p
, int r
)
5077 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5078 write_insn
<big_endian
>(p
, insn
);
5080 insn
= lvx_0_12_0
+ (r
<< 21);
5081 write_insn
<big_endian
>(p
, insn
);
5085 template<bool big_endian
>
5086 static unsigned char*
5087 restvr_tail(unsigned char* p
, int r
)
5089 p
= restvr
<big_endian
>(p
, r
);
5090 write_insn
<big_endian
>(p
, blr
);
5095 template<int size
, bool big_endian
>
5096 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5097 Symbol_table
* symtab
)
5098 : Output_section_data_build(4),
5101 this->savres_define(symtab
,
5102 "_savegpr0_", 14, 31,
5103 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5104 this->savres_define(symtab
,
5105 "_restgpr0_", 14, 29,
5106 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5107 this->savres_define(symtab
,
5108 "_restgpr0_", 30, 31,
5109 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5110 this->savres_define(symtab
,
5111 "_savegpr1_", 14, 31,
5112 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5113 this->savres_define(symtab
,
5114 "_restgpr1_", 14, 31,
5115 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5116 this->savres_define(symtab
,
5117 "_savefpr_", 14, 31,
5118 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5119 this->savres_define(symtab
,
5120 "_restfpr_", 14, 29,
5121 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5122 this->savres_define(symtab
,
5123 "_restfpr_", 30, 31,
5124 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5125 this->savres_define(symtab
,
5127 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5128 this->savres_define(symtab
,
5130 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5131 this->savres_define(symtab
,
5133 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5134 this->savres_define(symtab
,
5136 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5139 template<int size
, bool big_endian
>
5141 Output_data_save_res
<size
, big_endian
>::savres_define(
5142 Symbol_table
* symtab
,
5144 unsigned int lo
, unsigned int hi
,
5145 unsigned char* write_ent(unsigned char*, int),
5146 unsigned char* write_tail(unsigned char*, int))
5148 size_t len
= strlen(name
);
5149 bool writing
= false;
5152 memcpy(sym
, name
, len
);
5155 for (unsigned int i
= lo
; i
<= hi
; i
++)
5157 sym
[len
+ 0] = i
/ 10 + '0';
5158 sym
[len
+ 1] = i
% 10 + '0';
5159 Symbol
* gsym
= symtab
->lookup(sym
);
5160 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5161 writing
= writing
|| refd
;
5164 if (this->contents_
== NULL
)
5165 this->contents_
= new unsigned char[this->savres_max
];
5167 section_size_type value
= this->current_data_size();
5168 unsigned char* p
= this->contents_
+ value
;
5170 p
= write_ent(p
, i
);
5172 p
= write_tail(p
, i
);
5173 section_size_type cur_size
= p
- this->contents_
;
5174 this->set_current_data_size(cur_size
);
5176 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5177 this, value
, cur_size
- value
,
5178 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5179 elfcpp::STV_HIDDEN
, 0, false, false);
5184 // Write out save/restore.
5186 template<int size
, bool big_endian
>
5188 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5190 const section_size_type off
= this->offset();
5191 const section_size_type oview_size
=
5192 convert_to_section_size_type(this->data_size());
5193 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5194 memcpy(oview
, this->contents_
, oview_size
);
5195 of
->write_output_view(off
, oview_size
, oview
);
5199 // Create the glink section.
5201 template<int size
, bool big_endian
>
5203 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5205 if (this->glink_
== NULL
)
5207 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5208 this->glink_
->add_eh_frame(layout
);
5209 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5210 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5211 this->glink_
, ORDER_TEXT
, false);
5215 // Create a PLT entry for a global symbol.
5217 template<int size
, bool big_endian
>
5219 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5223 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5224 && gsym
->can_use_relative_reloc(false))
5226 if (this->iplt_
== NULL
)
5227 this->make_iplt_section(symtab
, layout
);
5228 this->iplt_
->add_ifunc_entry(gsym
);
5232 if (this->plt_
== NULL
)
5233 this->make_plt_section(symtab
, layout
);
5234 this->plt_
->add_entry(gsym
);
5238 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5240 template<int size
, bool big_endian
>
5242 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5243 Symbol_table
* symtab
,
5245 Sized_relobj_file
<size
, big_endian
>* relobj
,
5248 if (this->iplt_
== NULL
)
5249 this->make_iplt_section(symtab
, layout
);
5250 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5253 // Return the number of entries in the PLT.
5255 template<int size
, bool big_endian
>
5257 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5259 if (this->plt_
== NULL
)
5261 return this->plt_
->entry_count();
5264 // Create a GOT entry for local dynamic __tls_get_addr calls.
5266 template<int size
, bool big_endian
>
5268 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5269 Symbol_table
* symtab
,
5271 Sized_relobj_file
<size
, big_endian
>* object
)
5273 if (this->tlsld_got_offset_
== -1U)
5275 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5276 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5277 Output_data_got_powerpc
<size
, big_endian
>* got
5278 = this->got_section(symtab
, layout
);
5279 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5280 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5282 this->tlsld_got_offset_
= got_offset
;
5284 return this->tlsld_got_offset_
;
5287 // Get the Reference_flags for a particular relocation.
5289 template<int size
, bool big_endian
>
5291 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5292 unsigned int r_type
,
5293 const Target_powerpc
* target
)
5299 case elfcpp::R_POWERPC_NONE
:
5300 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5301 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5302 case elfcpp::R_PPC64_TOC
:
5303 // No symbol reference.
5306 case elfcpp::R_PPC64_ADDR64
:
5307 case elfcpp::R_PPC64_UADDR64
:
5308 case elfcpp::R_POWERPC_ADDR32
:
5309 case elfcpp::R_POWERPC_UADDR32
:
5310 case elfcpp::R_POWERPC_ADDR16
:
5311 case elfcpp::R_POWERPC_UADDR16
:
5312 case elfcpp::R_POWERPC_ADDR16_LO
:
5313 case elfcpp::R_POWERPC_ADDR16_HI
:
5314 case elfcpp::R_POWERPC_ADDR16_HA
:
5315 ref
= Symbol::ABSOLUTE_REF
;
5318 case elfcpp::R_POWERPC_ADDR24
:
5319 case elfcpp::R_POWERPC_ADDR14
:
5320 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5321 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5322 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5325 case elfcpp::R_PPC64_REL64
:
5326 case elfcpp::R_POWERPC_REL32
:
5327 case elfcpp::R_PPC_LOCAL24PC
:
5328 case elfcpp::R_POWERPC_REL16
:
5329 case elfcpp::R_POWERPC_REL16_LO
:
5330 case elfcpp::R_POWERPC_REL16_HI
:
5331 case elfcpp::R_POWERPC_REL16_HA
:
5332 ref
= Symbol::RELATIVE_REF
;
5335 case elfcpp::R_POWERPC_REL24
:
5336 case elfcpp::R_PPC_PLTREL24
:
5337 case elfcpp::R_POWERPC_REL14
:
5338 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5339 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5340 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5343 case elfcpp::R_POWERPC_GOT16
:
5344 case elfcpp::R_POWERPC_GOT16_LO
:
5345 case elfcpp::R_POWERPC_GOT16_HI
:
5346 case elfcpp::R_POWERPC_GOT16_HA
:
5347 case elfcpp::R_PPC64_GOT16_DS
:
5348 case elfcpp::R_PPC64_GOT16_LO_DS
:
5349 case elfcpp::R_PPC64_TOC16
:
5350 case elfcpp::R_PPC64_TOC16_LO
:
5351 case elfcpp::R_PPC64_TOC16_HI
:
5352 case elfcpp::R_PPC64_TOC16_HA
:
5353 case elfcpp::R_PPC64_TOC16_DS
:
5354 case elfcpp::R_PPC64_TOC16_LO_DS
:
5355 ref
= Symbol::RELATIVE_REF
;
5358 case elfcpp::R_POWERPC_GOT_TPREL16
:
5359 case elfcpp::R_POWERPC_TLS
:
5360 ref
= Symbol::TLS_REF
;
5363 case elfcpp::R_POWERPC_COPY
:
5364 case elfcpp::R_POWERPC_GLOB_DAT
:
5365 case elfcpp::R_POWERPC_JMP_SLOT
:
5366 case elfcpp::R_POWERPC_RELATIVE
:
5367 case elfcpp::R_POWERPC_DTPMOD
:
5369 // Not expected. We will give an error later.
5373 if (size
== 64 && target
->abiversion() < 2)
5374 ref
|= Symbol::FUNC_DESC_ABI
;
5378 // Report an unsupported relocation against a local symbol.
5380 template<int size
, bool big_endian
>
5382 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5383 Sized_relobj_file
<size
, big_endian
>* object
,
5384 unsigned int r_type
)
5386 gold_error(_("%s: unsupported reloc %u against local symbol"),
5387 object
->name().c_str(), r_type
);
5390 // We are about to emit a dynamic relocation of type R_TYPE. If the
5391 // dynamic linker does not support it, issue an error.
5393 template<int size
, bool big_endian
>
5395 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5396 unsigned int r_type
)
5398 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5400 // These are the relocation types supported by glibc for both 32-bit
5401 // and 64-bit powerpc.
5404 case elfcpp::R_POWERPC_NONE
:
5405 case elfcpp::R_POWERPC_RELATIVE
:
5406 case elfcpp::R_POWERPC_GLOB_DAT
:
5407 case elfcpp::R_POWERPC_DTPMOD
:
5408 case elfcpp::R_POWERPC_DTPREL
:
5409 case elfcpp::R_POWERPC_TPREL
:
5410 case elfcpp::R_POWERPC_JMP_SLOT
:
5411 case elfcpp::R_POWERPC_COPY
:
5412 case elfcpp::R_POWERPC_IRELATIVE
:
5413 case elfcpp::R_POWERPC_ADDR32
:
5414 case elfcpp::R_POWERPC_UADDR32
:
5415 case elfcpp::R_POWERPC_ADDR24
:
5416 case elfcpp::R_POWERPC_ADDR16
:
5417 case elfcpp::R_POWERPC_UADDR16
:
5418 case elfcpp::R_POWERPC_ADDR16_LO
:
5419 case elfcpp::R_POWERPC_ADDR16_HI
:
5420 case elfcpp::R_POWERPC_ADDR16_HA
:
5421 case elfcpp::R_POWERPC_ADDR14
:
5422 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5423 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5424 case elfcpp::R_POWERPC_REL32
:
5425 case elfcpp::R_POWERPC_REL24
:
5426 case elfcpp::R_POWERPC_TPREL16
:
5427 case elfcpp::R_POWERPC_TPREL16_LO
:
5428 case elfcpp::R_POWERPC_TPREL16_HI
:
5429 case elfcpp::R_POWERPC_TPREL16_HA
:
5440 // These are the relocation types supported only on 64-bit.
5441 case elfcpp::R_PPC64_ADDR64
:
5442 case elfcpp::R_PPC64_UADDR64
:
5443 case elfcpp::R_PPC64_JMP_IREL
:
5444 case elfcpp::R_PPC64_ADDR16_DS
:
5445 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5446 case elfcpp::R_PPC64_ADDR16_HIGH
:
5447 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5448 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5449 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5450 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5451 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5452 case elfcpp::R_PPC64_REL64
:
5453 case elfcpp::R_POWERPC_ADDR30
:
5454 case elfcpp::R_PPC64_TPREL16_DS
:
5455 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5456 case elfcpp::R_PPC64_TPREL16_HIGH
:
5457 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5458 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5459 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5460 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5461 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5472 // These are the relocation types supported only on 32-bit.
5473 // ??? glibc ld.so doesn't need to support these.
5474 case elfcpp::R_POWERPC_DTPREL16
:
5475 case elfcpp::R_POWERPC_DTPREL16_LO
:
5476 case elfcpp::R_POWERPC_DTPREL16_HI
:
5477 case elfcpp::R_POWERPC_DTPREL16_HA
:
5485 // This prevents us from issuing more than one error per reloc
5486 // section. But we can still wind up issuing more than one
5487 // error per object file.
5488 if (this->issued_non_pic_error_
)
5490 gold_assert(parameters
->options().output_is_position_independent());
5491 object
->error(_("requires unsupported dynamic reloc; "
5492 "recompile with -fPIC"));
5493 this->issued_non_pic_error_
= true;
5497 // Return whether we need to make a PLT entry for a relocation of the
5498 // given type against a STT_GNU_IFUNC symbol.
5500 template<int size
, bool big_endian
>
5502 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5503 Target_powerpc
<size
, big_endian
>* target
,
5504 Sized_relobj_file
<size
, big_endian
>* object
,
5505 unsigned int r_type
,
5508 // In non-pic code any reference will resolve to the plt call stub
5509 // for the ifunc symbol.
5510 if ((size
== 32 || target
->abiversion() >= 2)
5511 && !parameters
->options().output_is_position_independent())
5516 // Word size refs from data sections are OK, but don't need a PLT entry.
5517 case elfcpp::R_POWERPC_ADDR32
:
5518 case elfcpp::R_POWERPC_UADDR32
:
5523 case elfcpp::R_PPC64_ADDR64
:
5524 case elfcpp::R_PPC64_UADDR64
:
5529 // GOT refs are good, but also don't need a PLT entry.
5530 case elfcpp::R_POWERPC_GOT16
:
5531 case elfcpp::R_POWERPC_GOT16_LO
:
5532 case elfcpp::R_POWERPC_GOT16_HI
:
5533 case elfcpp::R_POWERPC_GOT16_HA
:
5534 case elfcpp::R_PPC64_GOT16_DS
:
5535 case elfcpp::R_PPC64_GOT16_LO_DS
:
5538 // Function calls are good, and these do need a PLT entry.
5539 case elfcpp::R_POWERPC_ADDR24
:
5540 case elfcpp::R_POWERPC_ADDR14
:
5541 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5542 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5543 case elfcpp::R_POWERPC_REL24
:
5544 case elfcpp::R_PPC_PLTREL24
:
5545 case elfcpp::R_POWERPC_REL14
:
5546 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5547 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5554 // Anything else is a problem.
5555 // If we are building a static executable, the libc startup function
5556 // responsible for applying indirect function relocations is going
5557 // to complain about the reloc type.
5558 // If we are building a dynamic executable, we will have a text
5559 // relocation. The dynamic loader will set the text segment
5560 // writable and non-executable to apply text relocations. So we'll
5561 // segfault when trying to run the indirection function to resolve
5564 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5565 object
->name().c_str(), r_type
);
5569 // Scan a relocation for a local symbol.
5571 template<int size
, bool big_endian
>
5573 Target_powerpc
<size
, big_endian
>::Scan::local(
5574 Symbol_table
* symtab
,
5576 Target_powerpc
<size
, big_endian
>* target
,
5577 Sized_relobj_file
<size
, big_endian
>* object
,
5578 unsigned int data_shndx
,
5579 Output_section
* output_section
,
5580 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5581 unsigned int r_type
,
5582 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5585 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5587 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5588 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5590 this->expect_tls_get_addr_call();
5591 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5592 if (tls_type
!= tls::TLSOPT_NONE
)
5593 this->skip_next_tls_get_addr_call();
5595 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5596 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5598 this->expect_tls_get_addr_call();
5599 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5600 if (tls_type
!= tls::TLSOPT_NONE
)
5601 this->skip_next_tls_get_addr_call();
5604 Powerpc_relobj
<size
, big_endian
>* ppc_object
5605 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5610 && data_shndx
== ppc_object
->opd_shndx()
5611 && r_type
== elfcpp::R_PPC64_ADDR64
)
5612 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5616 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5617 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5618 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5620 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5621 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5622 r_type
, r_sym
, reloc
.get_r_addend());
5623 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5628 case elfcpp::R_POWERPC_NONE
:
5629 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5630 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5631 case elfcpp::R_PPC64_TOCSAVE
:
5632 case elfcpp::R_POWERPC_TLS
:
5633 case elfcpp::R_PPC64_ENTRY
:
5636 case elfcpp::R_PPC64_TOC
:
5638 Output_data_got_powerpc
<size
, big_endian
>* got
5639 = target
->got_section(symtab
, layout
);
5640 if (parameters
->options().output_is_position_independent())
5642 Address off
= reloc
.get_r_offset();
5644 && target
->abiversion() < 2
5645 && data_shndx
== ppc_object
->opd_shndx()
5646 && ppc_object
->get_opd_discard(off
- 8))
5649 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5650 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5651 rela_dyn
->add_output_section_relative(got
->output_section(),
5652 elfcpp::R_POWERPC_RELATIVE
,
5654 object
, data_shndx
, off
,
5655 symobj
->toc_base_offset());
5660 case elfcpp::R_PPC64_ADDR64
:
5661 case elfcpp::R_PPC64_UADDR64
:
5662 case elfcpp::R_POWERPC_ADDR32
:
5663 case elfcpp::R_POWERPC_UADDR32
:
5664 case elfcpp::R_POWERPC_ADDR24
:
5665 case elfcpp::R_POWERPC_ADDR16
:
5666 case elfcpp::R_POWERPC_ADDR16_LO
:
5667 case elfcpp::R_POWERPC_ADDR16_HI
:
5668 case elfcpp::R_POWERPC_ADDR16_HA
:
5669 case elfcpp::R_POWERPC_UADDR16
:
5670 case elfcpp::R_PPC64_ADDR16_HIGH
:
5671 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5672 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5673 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5674 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5675 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5676 case elfcpp::R_PPC64_ADDR16_DS
:
5677 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5678 case elfcpp::R_POWERPC_ADDR14
:
5679 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5680 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5681 // If building a shared library (or a position-independent
5682 // executable), we need to create a dynamic relocation for
5684 if (parameters
->options().output_is_position_independent()
5685 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5687 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5689 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5690 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5691 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5693 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5694 : elfcpp::R_POWERPC_RELATIVE
);
5695 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5696 output_section
, data_shndx
,
5697 reloc
.get_r_offset(),
5698 reloc
.get_r_addend(), false);
5700 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5702 check_non_pic(object
, r_type
);
5703 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5704 data_shndx
, reloc
.get_r_offset(),
5705 reloc
.get_r_addend());
5709 gold_assert(lsym
.get_st_value() == 0);
5710 unsigned int shndx
= lsym
.get_st_shndx();
5712 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5715 object
->error(_("section symbol %u has bad shndx %u"),
5718 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5719 output_section
, data_shndx
,
5720 reloc
.get_r_offset());
5725 case elfcpp::R_POWERPC_REL24
:
5726 case elfcpp::R_PPC_PLTREL24
:
5727 case elfcpp::R_PPC_LOCAL24PC
:
5728 case elfcpp::R_POWERPC_REL14
:
5729 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5730 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5732 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5733 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5734 reloc
.get_r_addend());
5737 case elfcpp::R_PPC64_REL64
:
5738 case elfcpp::R_POWERPC_REL32
:
5739 case elfcpp::R_POWERPC_REL16
:
5740 case elfcpp::R_POWERPC_REL16_LO
:
5741 case elfcpp::R_POWERPC_REL16_HI
:
5742 case elfcpp::R_POWERPC_REL16_HA
:
5743 case elfcpp::R_POWERPC_REL16DX_HA
:
5744 case elfcpp::R_POWERPC_SECTOFF
:
5745 case elfcpp::R_POWERPC_SECTOFF_LO
:
5746 case elfcpp::R_POWERPC_SECTOFF_HI
:
5747 case elfcpp::R_POWERPC_SECTOFF_HA
:
5748 case elfcpp::R_PPC64_SECTOFF_DS
:
5749 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5750 case elfcpp::R_POWERPC_TPREL16
:
5751 case elfcpp::R_POWERPC_TPREL16_LO
:
5752 case elfcpp::R_POWERPC_TPREL16_HI
:
5753 case elfcpp::R_POWERPC_TPREL16_HA
:
5754 case elfcpp::R_PPC64_TPREL16_DS
:
5755 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5756 case elfcpp::R_PPC64_TPREL16_HIGH
:
5757 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5758 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5759 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5760 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5761 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5762 case elfcpp::R_POWERPC_DTPREL16
:
5763 case elfcpp::R_POWERPC_DTPREL16_LO
:
5764 case elfcpp::R_POWERPC_DTPREL16_HI
:
5765 case elfcpp::R_POWERPC_DTPREL16_HA
:
5766 case elfcpp::R_PPC64_DTPREL16_DS
:
5767 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5768 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5769 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5770 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5771 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5772 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5773 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5774 case elfcpp::R_PPC64_TLSGD
:
5775 case elfcpp::R_PPC64_TLSLD
:
5776 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5779 case elfcpp::R_POWERPC_GOT16
:
5780 case elfcpp::R_POWERPC_GOT16_LO
:
5781 case elfcpp::R_POWERPC_GOT16_HI
:
5782 case elfcpp::R_POWERPC_GOT16_HA
:
5783 case elfcpp::R_PPC64_GOT16_DS
:
5784 case elfcpp::R_PPC64_GOT16_LO_DS
:
5786 // The symbol requires a GOT entry.
5787 Output_data_got_powerpc
<size
, big_endian
>* got
5788 = target
->got_section(symtab
, layout
);
5789 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5791 if (!parameters
->options().output_is_position_independent())
5794 && (size
== 32 || target
->abiversion() >= 2))
5795 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5797 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5799 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5801 // If we are generating a shared object or a pie, this
5802 // symbol's GOT entry will be set by a dynamic relocation.
5804 off
= got
->add_constant(0);
5805 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5807 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5809 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5810 : elfcpp::R_POWERPC_RELATIVE
);
5811 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5812 got
, off
, 0, false);
5817 case elfcpp::R_PPC64_TOC16
:
5818 case elfcpp::R_PPC64_TOC16_LO
:
5819 case elfcpp::R_PPC64_TOC16_HI
:
5820 case elfcpp::R_PPC64_TOC16_HA
:
5821 case elfcpp::R_PPC64_TOC16_DS
:
5822 case elfcpp::R_PPC64_TOC16_LO_DS
:
5823 // We need a GOT section.
5824 target
->got_section(symtab
, layout
);
5827 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5828 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5829 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5830 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5832 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5833 if (tls_type
== tls::TLSOPT_NONE
)
5835 Output_data_got_powerpc
<size
, big_endian
>* got
5836 = target
->got_section(symtab
, layout
);
5837 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5838 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5839 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5840 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5842 else if (tls_type
== tls::TLSOPT_TO_LE
)
5844 // no GOT relocs needed for Local Exec.
5851 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5852 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5853 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5854 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5856 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5857 if (tls_type
== tls::TLSOPT_NONE
)
5858 target
->tlsld_got_offset(symtab
, layout
, object
);
5859 else if (tls_type
== tls::TLSOPT_TO_LE
)
5861 // no GOT relocs needed for Local Exec.
5862 if (parameters
->options().emit_relocs())
5864 Output_section
* os
= layout
->tls_segment()->first_section();
5865 gold_assert(os
!= NULL
);
5866 os
->set_needs_symtab_index();
5874 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5875 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5876 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5877 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5879 Output_data_got_powerpc
<size
, big_endian
>* got
5880 = target
->got_section(symtab
, layout
);
5881 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5882 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5886 case elfcpp::R_POWERPC_GOT_TPREL16
:
5887 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5888 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5889 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5891 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5892 if (tls_type
== tls::TLSOPT_NONE
)
5894 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5895 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5897 Output_data_got_powerpc
<size
, big_endian
>* got
5898 = target
->got_section(symtab
, layout
);
5899 unsigned int off
= got
->add_constant(0);
5900 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5902 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5903 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5904 elfcpp::R_POWERPC_TPREL
,
5908 else if (tls_type
== tls::TLSOPT_TO_LE
)
5910 // no GOT relocs needed for Local Exec.
5918 unsupported_reloc_local(object
, r_type
);
5924 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5925 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5926 case elfcpp::R_POWERPC_GOT_TPREL16
:
5927 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5928 case elfcpp::R_POWERPC_GOT16
:
5929 case elfcpp::R_PPC64_GOT16_DS
:
5930 case elfcpp::R_PPC64_TOC16
:
5931 case elfcpp::R_PPC64_TOC16_DS
:
5932 ppc_object
->set_has_small_toc_reloc();
5938 // Report an unsupported relocation against a global symbol.
5940 template<int size
, bool big_endian
>
5942 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5943 Sized_relobj_file
<size
, big_endian
>* object
,
5944 unsigned int r_type
,
5947 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5948 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5951 // Scan a relocation for a global symbol.
5953 template<int size
, bool big_endian
>
5955 Target_powerpc
<size
, big_endian
>::Scan::global(
5956 Symbol_table
* symtab
,
5958 Target_powerpc
<size
, big_endian
>* target
,
5959 Sized_relobj_file
<size
, big_endian
>* object
,
5960 unsigned int data_shndx
,
5961 Output_section
* output_section
,
5962 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5963 unsigned int r_type
,
5966 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5969 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5970 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5972 this->expect_tls_get_addr_call();
5973 const bool final
= gsym
->final_value_is_known();
5974 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5975 if (tls_type
!= tls::TLSOPT_NONE
)
5976 this->skip_next_tls_get_addr_call();
5978 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5979 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5981 this->expect_tls_get_addr_call();
5982 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5983 if (tls_type
!= tls::TLSOPT_NONE
)
5984 this->skip_next_tls_get_addr_call();
5987 Powerpc_relobj
<size
, big_endian
>* ppc_object
5988 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5990 // A STT_GNU_IFUNC symbol may require a PLT entry.
5991 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5992 bool pushed_ifunc
= false;
5993 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5995 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5996 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5997 reloc
.get_r_addend());
5998 target
->make_plt_entry(symtab
, layout
, gsym
);
5999 pushed_ifunc
= true;
6004 case elfcpp::R_POWERPC_NONE
:
6005 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6006 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6007 case elfcpp::R_PPC_LOCAL24PC
:
6008 case elfcpp::R_POWERPC_TLS
:
6009 case elfcpp::R_PPC64_ENTRY
:
6012 case elfcpp::R_PPC64_TOC
:
6014 Output_data_got_powerpc
<size
, big_endian
>* got
6015 = target
->got_section(symtab
, layout
);
6016 if (parameters
->options().output_is_position_independent())
6018 Address off
= reloc
.get_r_offset();
6020 && data_shndx
== ppc_object
->opd_shndx()
6021 && ppc_object
->get_opd_discard(off
- 8))
6024 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6025 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6026 if (data_shndx
!= ppc_object
->opd_shndx())
6027 symobj
= static_cast
6028 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6029 rela_dyn
->add_output_section_relative(got
->output_section(),
6030 elfcpp::R_POWERPC_RELATIVE
,
6032 object
, data_shndx
, off
,
6033 symobj
->toc_base_offset());
6038 case elfcpp::R_PPC64_ADDR64
:
6040 && target
->abiversion() < 2
6041 && data_shndx
== ppc_object
->opd_shndx()
6042 && (gsym
->is_defined_in_discarded_section()
6043 || gsym
->object() != object
))
6045 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6049 case elfcpp::R_PPC64_UADDR64
:
6050 case elfcpp::R_POWERPC_ADDR32
:
6051 case elfcpp::R_POWERPC_UADDR32
:
6052 case elfcpp::R_POWERPC_ADDR24
:
6053 case elfcpp::R_POWERPC_ADDR16
:
6054 case elfcpp::R_POWERPC_ADDR16_LO
:
6055 case elfcpp::R_POWERPC_ADDR16_HI
:
6056 case elfcpp::R_POWERPC_ADDR16_HA
:
6057 case elfcpp::R_POWERPC_UADDR16
:
6058 case elfcpp::R_PPC64_ADDR16_HIGH
:
6059 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6060 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6061 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6062 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6063 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6064 case elfcpp::R_PPC64_ADDR16_DS
:
6065 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6066 case elfcpp::R_POWERPC_ADDR14
:
6067 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6068 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6070 // Make a PLT entry if necessary.
6071 if (gsym
->needs_plt_entry())
6073 // Since this is not a PC-relative relocation, we may be
6074 // taking the address of a function. In that case we need to
6075 // set the entry in the dynamic symbol table to the address of
6076 // the PLT call stub.
6077 bool need_ifunc_plt
= false;
6078 if ((size
== 32 || target
->abiversion() >= 2)
6079 && gsym
->is_from_dynobj()
6080 && !parameters
->options().output_is_position_independent())
6082 gsym
->set_needs_dynsym_value();
6083 need_ifunc_plt
= true;
6085 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
6087 target
->push_branch(ppc_object
, data_shndx
,
6088 reloc
.get_r_offset(), r_type
,
6089 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6090 reloc
.get_r_addend());
6091 target
->make_plt_entry(symtab
, layout
, gsym
);
6094 // Make a dynamic relocation if necessary.
6095 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
6096 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6098 if (!parameters
->options().output_is_position_independent()
6099 && gsym
->may_need_copy_reloc())
6101 target
->copy_reloc(symtab
, layout
, object
,
6102 data_shndx
, output_section
, gsym
, reloc
);
6104 else if ((((size
== 32
6105 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6107 && r_type
== elfcpp::R_PPC64_ADDR64
6108 && target
->abiversion() >= 2))
6109 && gsym
->can_use_relative_reloc(false)
6110 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6111 && parameters
->options().shared()))
6113 && r_type
== elfcpp::R_PPC64_ADDR64
6114 && target
->abiversion() < 2
6115 && (gsym
->can_use_relative_reloc(false)
6116 || data_shndx
== ppc_object
->opd_shndx())))
6118 Reloc_section
* rela_dyn
6119 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6120 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6121 : elfcpp::R_POWERPC_RELATIVE
);
6122 rela_dyn
->add_symbolless_global_addend(
6123 gsym
, dynrel
, output_section
, object
, data_shndx
,
6124 reloc
.get_r_offset(), reloc
.get_r_addend());
6128 Reloc_section
* rela_dyn
6129 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6130 check_non_pic(object
, r_type
);
6131 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6133 reloc
.get_r_offset(),
6134 reloc
.get_r_addend());
6140 case elfcpp::R_PPC_PLTREL24
:
6141 case elfcpp::R_POWERPC_REL24
:
6144 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6146 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6147 reloc
.get_r_addend());
6148 if (gsym
->needs_plt_entry()
6149 || (!gsym
->final_value_is_known()
6150 && (gsym
->is_undefined()
6151 || gsym
->is_from_dynobj()
6152 || gsym
->is_preemptible())))
6153 target
->make_plt_entry(symtab
, layout
, gsym
);
6157 case elfcpp::R_PPC64_REL64
:
6158 case elfcpp::R_POWERPC_REL32
:
6159 // Make a dynamic relocation if necessary.
6160 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6162 if (!parameters
->options().output_is_position_independent()
6163 && gsym
->may_need_copy_reloc())
6165 target
->copy_reloc(symtab
, layout
, object
,
6166 data_shndx
, output_section
, gsym
,
6171 Reloc_section
* rela_dyn
6172 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6173 check_non_pic(object
, r_type
);
6174 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6175 data_shndx
, reloc
.get_r_offset(),
6176 reloc
.get_r_addend());
6181 case elfcpp::R_POWERPC_REL14
:
6182 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6183 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6185 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6186 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6187 reloc
.get_r_addend());
6190 case elfcpp::R_POWERPC_REL16
:
6191 case elfcpp::R_POWERPC_REL16_LO
:
6192 case elfcpp::R_POWERPC_REL16_HI
:
6193 case elfcpp::R_POWERPC_REL16_HA
:
6194 case elfcpp::R_POWERPC_REL16DX_HA
:
6195 case elfcpp::R_POWERPC_SECTOFF
:
6196 case elfcpp::R_POWERPC_SECTOFF_LO
:
6197 case elfcpp::R_POWERPC_SECTOFF_HI
:
6198 case elfcpp::R_POWERPC_SECTOFF_HA
:
6199 case elfcpp::R_PPC64_SECTOFF_DS
:
6200 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6201 case elfcpp::R_POWERPC_TPREL16
:
6202 case elfcpp::R_POWERPC_TPREL16_LO
:
6203 case elfcpp::R_POWERPC_TPREL16_HI
:
6204 case elfcpp::R_POWERPC_TPREL16_HA
:
6205 case elfcpp::R_PPC64_TPREL16_DS
:
6206 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6207 case elfcpp::R_PPC64_TPREL16_HIGH
:
6208 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6209 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6210 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6211 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6212 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6213 case elfcpp::R_POWERPC_DTPREL16
:
6214 case elfcpp::R_POWERPC_DTPREL16_LO
:
6215 case elfcpp::R_POWERPC_DTPREL16_HI
:
6216 case elfcpp::R_POWERPC_DTPREL16_HA
:
6217 case elfcpp::R_PPC64_DTPREL16_DS
:
6218 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6219 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6220 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6221 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6222 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6223 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6224 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6225 case elfcpp::R_PPC64_TLSGD
:
6226 case elfcpp::R_PPC64_TLSLD
:
6227 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6230 case elfcpp::R_POWERPC_GOT16
:
6231 case elfcpp::R_POWERPC_GOT16_LO
:
6232 case elfcpp::R_POWERPC_GOT16_HI
:
6233 case elfcpp::R_POWERPC_GOT16_HA
:
6234 case elfcpp::R_PPC64_GOT16_DS
:
6235 case elfcpp::R_PPC64_GOT16_LO_DS
:
6237 // The symbol requires a GOT entry.
6238 Output_data_got_powerpc
<size
, big_endian
>* got
;
6240 got
= target
->got_section(symtab
, layout
);
6241 if (gsym
->final_value_is_known())
6244 && (size
== 32 || target
->abiversion() >= 2))
6245 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6247 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6249 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6251 // If we are generating a shared object or a pie, this
6252 // symbol's GOT entry will be set by a dynamic relocation.
6253 unsigned int off
= got
->add_constant(0);
6254 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6256 Reloc_section
* rela_dyn
6257 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6259 if (gsym
->can_use_relative_reloc(false)
6261 || target
->abiversion() >= 2)
6262 && gsym
->visibility() == elfcpp::STV_PROTECTED
6263 && parameters
->options().shared()))
6265 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6266 : elfcpp::R_POWERPC_RELATIVE
);
6267 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6271 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6272 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6278 case elfcpp::R_PPC64_TOC16
:
6279 case elfcpp::R_PPC64_TOC16_LO
:
6280 case elfcpp::R_PPC64_TOC16_HI
:
6281 case elfcpp::R_PPC64_TOC16_HA
:
6282 case elfcpp::R_PPC64_TOC16_DS
:
6283 case elfcpp::R_PPC64_TOC16_LO_DS
:
6284 // We need a GOT section.
6285 target
->got_section(symtab
, layout
);
6288 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6289 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6290 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6291 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6293 const bool final
= gsym
->final_value_is_known();
6294 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6295 if (tls_type
== tls::TLSOPT_NONE
)
6297 Output_data_got_powerpc
<size
, big_endian
>* got
6298 = target
->got_section(symtab
, layout
);
6299 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6300 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6301 elfcpp::R_POWERPC_DTPMOD
,
6302 elfcpp::R_POWERPC_DTPREL
);
6304 else if (tls_type
== tls::TLSOPT_TO_IE
)
6306 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6308 Output_data_got_powerpc
<size
, big_endian
>* got
6309 = target
->got_section(symtab
, layout
);
6310 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6311 if (gsym
->is_undefined()
6312 || gsym
->is_from_dynobj())
6314 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6315 elfcpp::R_POWERPC_TPREL
);
6319 unsigned int off
= got
->add_constant(0);
6320 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6321 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6322 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6327 else if (tls_type
== tls::TLSOPT_TO_LE
)
6329 // no GOT relocs needed for Local Exec.
6336 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6337 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6338 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6339 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6341 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6342 if (tls_type
== tls::TLSOPT_NONE
)
6343 target
->tlsld_got_offset(symtab
, layout
, object
);
6344 else if (tls_type
== tls::TLSOPT_TO_LE
)
6346 // no GOT relocs needed for Local Exec.
6347 if (parameters
->options().emit_relocs())
6349 Output_section
* os
= layout
->tls_segment()->first_section();
6350 gold_assert(os
!= NULL
);
6351 os
->set_needs_symtab_index();
6359 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6360 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6361 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6362 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6364 Output_data_got_powerpc
<size
, big_endian
>* got
6365 = target
->got_section(symtab
, layout
);
6366 if (!gsym
->final_value_is_known()
6367 && (gsym
->is_from_dynobj()
6368 || gsym
->is_undefined()
6369 || gsym
->is_preemptible()))
6370 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6371 target
->rela_dyn_section(layout
),
6372 elfcpp::R_POWERPC_DTPREL
);
6374 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6378 case elfcpp::R_POWERPC_GOT_TPREL16
:
6379 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6380 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6381 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6383 const bool final
= gsym
->final_value_is_known();
6384 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6385 if (tls_type
== tls::TLSOPT_NONE
)
6387 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6389 Output_data_got_powerpc
<size
, big_endian
>* got
6390 = target
->got_section(symtab
, layout
);
6391 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6392 if (gsym
->is_undefined()
6393 || gsym
->is_from_dynobj())
6395 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6396 elfcpp::R_POWERPC_TPREL
);
6400 unsigned int off
= got
->add_constant(0);
6401 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6402 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6403 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6408 else if (tls_type
== tls::TLSOPT_TO_LE
)
6410 // no GOT relocs needed for Local Exec.
6418 unsupported_reloc_global(object
, r_type
, gsym
);
6424 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6425 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6426 case elfcpp::R_POWERPC_GOT_TPREL16
:
6427 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6428 case elfcpp::R_POWERPC_GOT16
:
6429 case elfcpp::R_PPC64_GOT16_DS
:
6430 case elfcpp::R_PPC64_TOC16
:
6431 case elfcpp::R_PPC64_TOC16_DS
:
6432 ppc_object
->set_has_small_toc_reloc();
6438 // Process relocations for gc.
6440 template<int size
, bool big_endian
>
6442 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6443 Symbol_table
* symtab
,
6445 Sized_relobj_file
<size
, big_endian
>* object
,
6446 unsigned int data_shndx
,
6448 const unsigned char* prelocs
,
6450 Output_section
* output_section
,
6451 bool needs_special_offset_handling
,
6452 size_t local_symbol_count
,
6453 const unsigned char* plocal_symbols
)
6455 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6456 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
6459 Powerpc_relobj
<size
, big_endian
>* ppc_object
6460 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6462 ppc_object
->set_opd_valid();
6463 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6465 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6466 for (p
= ppc_object
->access_from_map()->begin();
6467 p
!= ppc_object
->access_from_map()->end();
6470 Address dst_off
= p
->first
;
6471 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6472 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6473 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6475 Relobj
* src_obj
= s
->first
;
6476 unsigned int src_indx
= s
->second
;
6477 symtab
->gc()->add_reference(src_obj
, src_indx
,
6478 ppc_object
, dst_indx
);
6482 ppc_object
->access_from_map()->clear();
6483 ppc_object
->process_gc_mark(symtab
);
6484 // Don't look at .opd relocs as .opd will reference everything.
6488 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
6497 needs_special_offset_handling
,
6502 // Handle target specific gc actions when adding a gc reference from
6503 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6504 // and DST_OFF. For powerpc64, this adds a referenc to the code
6505 // section of a function descriptor.
6507 template<int size
, bool big_endian
>
6509 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6510 Symbol_table
* symtab
,
6512 unsigned int src_shndx
,
6514 unsigned int dst_shndx
,
6515 Address dst_off
) const
6517 if (size
!= 64 || dst_obj
->is_dynamic())
6520 Powerpc_relobj
<size
, big_endian
>* ppc_object
6521 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6522 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6524 if (ppc_object
->opd_valid())
6526 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6527 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6531 // If we haven't run scan_opd_relocs, we must delay
6532 // processing this function descriptor reference.
6533 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6538 // Add any special sections for this symbol to the gc work list.
6539 // For powerpc64, this adds the code section of a function
6542 template<int size
, bool big_endian
>
6544 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6545 Symbol_table
* symtab
,
6550 Powerpc_relobj
<size
, big_endian
>* ppc_object
6551 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6553 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6554 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6556 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6557 Address dst_off
= gsym
->value();
6558 if (ppc_object
->opd_valid())
6560 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6561 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
6565 ppc_object
->add_gc_mark(dst_off
);
6570 // For a symbol location in .opd, set LOC to the location of the
6573 template<int size
, bool big_endian
>
6575 Target_powerpc
<size
, big_endian
>::do_function_location(
6576 Symbol_location
* loc
) const
6578 if (size
== 64 && loc
->shndx
!= 0)
6580 if (loc
->object
->is_dynamic())
6582 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6583 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6584 if (loc
->shndx
== ppc_object
->opd_shndx())
6587 Address off
= loc
->offset
- ppc_object
->opd_address();
6588 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6589 loc
->offset
= dest_off
;
6594 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6595 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6596 if (loc
->shndx
== ppc_object
->opd_shndx())
6599 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6600 loc
->offset
= dest_off
;
6606 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6607 // compiled with -fsplit-stack. The function calls non-split-stack
6608 // code. Change the function to ensure it has enough stack space to
6609 // call some random function.
6611 template<int size
, bool big_endian
>
6613 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
6616 section_offset_type fnoffset
,
6617 section_size_type fnsize
,
6618 const unsigned char* prelocs
,
6620 unsigned char* view
,
6621 section_size_type view_size
,
6623 std::string
* to
) const
6625 // 32-bit not supported.
6629 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
6630 prelocs
, reloc_count
, view
, view_size
,
6635 // The function always starts with
6636 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6637 // addis %r12,%r1,-allocate@ha
6638 // addi %r12,%r12,-allocate@l
6640 // but note that the addis or addi may be replaced with a nop
6642 unsigned char *entry
= view
+ fnoffset
;
6643 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6645 if ((insn
& 0xffff0000) == addis_2_12
)
6647 /* Skip ELFv2 global entry code. */
6649 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6652 unsigned char *pinsn
= entry
;
6654 const uint32_t ld_private_ss
= 0xe80d8fc0;
6655 if (insn
== ld_private_ss
)
6657 int32_t allocate
= 0;
6661 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
6662 if ((insn
& 0xffff0000) == addis_12_1
)
6663 allocate
+= (insn
& 0xffff) << 16;
6664 else if ((insn
& 0xffff0000) == addi_12_1
6665 || (insn
& 0xffff0000) == addi_12_12
)
6666 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
6667 else if (insn
!= nop
)
6670 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
6672 int extra
= parameters
->options().split_stack_adjust_size();
6674 if (allocate
>= 0 || extra
< 0)
6676 object
->error(_("split-stack stack size overflow at "
6677 "section %u offset %0zx"),
6678 shndx
, static_cast<size_t>(fnoffset
));
6682 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
6683 if (insn
!= addis_12_1
)
6685 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6687 insn
= addi_12_12
| (allocate
& 0xffff);
6688 if (insn
!= addi_12_12
)
6690 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6696 insn
= addi_12_1
| (allocate
& 0xffff);
6697 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6700 if (pinsn
!= entry
+ 12)
6701 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
6709 if (!object
->has_no_split_stack())
6710 object
->error(_("failed to match split-stack sequence at "
6711 "section %u offset %0zx"),
6712 shndx
, static_cast<size_t>(fnoffset
));
6716 // Scan relocations for a section.
6718 template<int size
, bool big_endian
>
6720 Target_powerpc
<size
, big_endian
>::scan_relocs(
6721 Symbol_table
* symtab
,
6723 Sized_relobj_file
<size
, big_endian
>* object
,
6724 unsigned int data_shndx
,
6725 unsigned int sh_type
,
6726 const unsigned char* prelocs
,
6728 Output_section
* output_section
,
6729 bool needs_special_offset_handling
,
6730 size_t local_symbol_count
,
6731 const unsigned char* plocal_symbols
)
6733 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6734 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
6737 if (sh_type
== elfcpp::SHT_REL
)
6739 gold_error(_("%s: unsupported REL reloc section"),
6740 object
->name().c_str());
6744 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
6753 needs_special_offset_handling
,
6758 // Functor class for processing the global symbol table.
6759 // Removes symbols defined on discarded opd entries.
6761 template<bool big_endian
>
6762 class Global_symbol_visitor_opd
6765 Global_symbol_visitor_opd()
6769 operator()(Sized_symbol
<64>* sym
)
6771 if (sym
->has_symtab_index()
6772 || sym
->source() != Symbol::FROM_OBJECT
6773 || !sym
->in_real_elf())
6776 if (sym
->object()->is_dynamic())
6779 Powerpc_relobj
<64, big_endian
>* symobj
6780 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6781 if (symobj
->opd_shndx() == 0)
6785 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6786 if (shndx
== symobj
->opd_shndx()
6787 && symobj
->get_opd_discard(sym
->value()))
6789 sym
->set_undefined();
6790 sym
->set_visibility(elfcpp::STV_DEFAULT
);
6791 sym
->set_is_defined_in_discarded_section();
6792 sym
->set_symtab_index(-1U);
6797 template<int size
, bool big_endian
>
6799 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6801 Symbol_table
* symtab
)
6805 Output_data_save_res
<size
, big_endian
>* savres
6806 = new Output_data_save_res
<size
, big_endian
>(symtab
);
6807 this->savres_section_
= savres
;
6808 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6809 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6810 savres
, ORDER_TEXT
, false);
6814 // Sort linker created .got section first (for the header), then input
6815 // sections belonging to files using small model code.
6817 template<bool big_endian
>
6818 class Sort_toc_sections
6822 operator()(const Output_section::Input_section
& is1
,
6823 const Output_section::Input_section
& is2
) const
6825 if (!is1
.is_input_section() && is2
.is_input_section())
6828 = (is1
.is_input_section()
6829 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6830 ->has_small_toc_reloc()));
6832 = (is2
.is_input_section()
6833 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6834 ->has_small_toc_reloc()));
6835 return small1
&& !small2
;
6839 // Finalize the sections.
6841 template<int size
, bool big_endian
>
6843 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6845 const Input_objects
*,
6846 Symbol_table
* symtab
)
6848 if (parameters
->doing_static_link())
6850 // At least some versions of glibc elf-init.o have a strong
6851 // reference to __rela_iplt marker syms. A weak ref would be
6853 if (this->iplt_
!= NULL
)
6855 Reloc_section
* rel
= this->iplt_
->rel_plt();
6856 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6857 Symbol_table::PREDEFINED
, rel
, 0, 0,
6858 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6859 elfcpp::STV_HIDDEN
, 0, false, true);
6860 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6861 Symbol_table::PREDEFINED
, rel
, 0, 0,
6862 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6863 elfcpp::STV_HIDDEN
, 0, true, true);
6867 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6868 Symbol_table::PREDEFINED
, 0, 0,
6869 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6870 elfcpp::STV_HIDDEN
, 0, true, false);
6871 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6872 Symbol_table::PREDEFINED
, 0, 0,
6873 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6874 elfcpp::STV_HIDDEN
, 0, true, false);
6880 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6881 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6883 if (!parameters
->options().relocatable())
6885 this->define_save_restore_funcs(layout
, symtab
);
6887 // Annoyingly, we need to make these sections now whether or
6888 // not we need them. If we delay until do_relax then we
6889 // need to mess with the relaxation machinery checkpointing.
6890 this->got_section(symtab
, layout
);
6891 this->make_brlt_section(layout
);
6893 if (parameters
->options().toc_sort())
6895 Output_section
* os
= this->got_
->output_section();
6896 if (os
!= NULL
&& os
->input_sections().size() > 1)
6897 std::stable_sort(os
->input_sections().begin(),
6898 os
->input_sections().end(),
6899 Sort_toc_sections
<big_endian
>());
6904 // Fill in some more dynamic tags.
6905 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6908 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6910 : this->plt_
->rel_plt());
6911 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6912 this->rela_dyn_
, true, size
== 32);
6916 if (this->got_
!= NULL
)
6918 this->got_
->finalize_data_size();
6919 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6920 this->got_
, this->got_
->g_o_t());
6925 if (this->glink_
!= NULL
)
6927 this->glink_
->finalize_data_size();
6928 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6930 (this->glink_
->pltresolve_size
6936 // Emit any relocs we saved in an attempt to avoid generating COPY
6938 if (this->copy_relocs_
.any_saved_relocs())
6939 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6942 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6946 ok_lo_toc_insn(uint32_t insn
)
6948 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6949 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6950 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6951 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6952 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6953 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6954 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6955 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6956 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6957 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6958 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6959 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6960 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6961 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6962 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6964 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6965 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6966 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6969 // Return the value to use for a branch relocation.
6971 template<int size
, bool big_endian
>
6973 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6974 const Symbol_table
* symtab
,
6975 const Sized_symbol
<size
>* gsym
,
6976 Powerpc_relobj
<size
, big_endian
>* object
,
6978 unsigned int *dest_shndx
)
6980 if (size
== 32 || this->abiversion() >= 2)
6984 // If the symbol is defined in an opd section, ie. is a function
6985 // descriptor, use the function descriptor code entry address
6986 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6988 && gsym
->source() != Symbol::FROM_OBJECT
)
6991 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6992 unsigned int shndx
= symobj
->opd_shndx();
6995 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6996 if (opd_addr
== invalid_address
)
6998 opd_addr
+= symobj
->output_section_address(shndx
);
6999 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
7002 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
7003 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
7006 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
7007 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
7008 *dest_shndx
= folded
.second
;
7010 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
7011 if (sec_addr
== invalid_address
)
7014 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
7015 *value
= sec_addr
+ sec_off
;
7020 // Perform a relocation.
7022 template<int size
, bool big_endian
>
7024 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
7025 const Relocate_info
<size
, big_endian
>* relinfo
,
7027 Target_powerpc
* target
,
7030 const unsigned char* preloc
,
7031 const Sized_symbol
<size
>* gsym
,
7032 const Symbol_value
<size
>* psymval
,
7033 unsigned char* view
,
7035 section_size_type view_size
)
7040 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
7041 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
7042 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
7044 case Track_tls::NOT_EXPECTED
:
7045 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7046 _("__tls_get_addr call lacks marker reloc"));
7048 case Track_tls::EXPECTED
:
7049 // We have already complained.
7051 case Track_tls::SKIP
:
7053 case Track_tls::NORMAL
:
7057 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
7058 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
7059 typedef typename Reloc_types
<elfcpp::SHT_RELA
,
7060 size
, big_endian
>::Reloc Reltype
;
7061 // Offset from start of insn to d-field reloc.
7062 const int d_offset
= big_endian
? 2 : 0;
7064 Powerpc_relobj
<size
, big_endian
>* const object
7065 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7067 bool has_stub_value
= false;
7068 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7070 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
7071 : object
->local_has_plt_offset(r_sym
))
7072 && (!psymval
->is_ifunc_symbol()
7073 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
7077 && target
->abiversion() >= 2
7078 && !parameters
->options().output_is_position_independent()
7079 && !is_branch_reloc(r_type
))
7081 Address off
= target
->glink_section()->find_global_entry(gsym
);
7082 if (off
!= invalid_address
)
7084 value
= target
->glink_section()->global_entry_address() + off
;
7085 has_stub_value
= true;
7090 Stub_table
<size
, big_endian
>* stub_table
7091 = object
->stub_table(relinfo
->data_shndx
);
7092 if (stub_table
== NULL
)
7094 // This is a ref from a data section to an ifunc symbol.
7095 if (target
->stub_tables().size() != 0)
7096 stub_table
= target
->stub_tables()[0];
7098 if (stub_table
!= NULL
)
7102 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
7103 rela
.get_r_addend());
7105 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
7106 rela
.get_r_addend());
7107 if (off
!= invalid_address
)
7109 value
= stub_table
->stub_address() + off
;
7110 has_stub_value
= true;
7114 // We don't care too much about bogus debug references to
7115 // non-local functions, but otherwise there had better be a plt
7116 // call stub or global entry stub as appropriate.
7117 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
7120 if (r_type
== elfcpp::R_POWERPC_GOT16
7121 || r_type
== elfcpp::R_POWERPC_GOT16_LO
7122 || r_type
== elfcpp::R_POWERPC_GOT16_HI
7123 || r_type
== elfcpp::R_POWERPC_GOT16_HA
7124 || r_type
== elfcpp::R_PPC64_GOT16_DS
7125 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7129 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7130 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7134 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7135 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7136 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7138 value
-= target
->got_section()->got_base_offset(object
);
7140 else if (r_type
== elfcpp::R_PPC64_TOC
)
7142 value
= (target
->got_section()->output_section()->address()
7143 + object
->toc_base_offset());
7145 else if (gsym
!= NULL
7146 && (r_type
== elfcpp::R_POWERPC_REL24
7147 || r_type
== elfcpp::R_PPC_PLTREL24
)
7152 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7153 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7154 bool can_plt_call
= false;
7155 if (rela
.get_r_offset() + 8 <= view_size
)
7157 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7158 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7161 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7163 elfcpp::Swap
<32, big_endian
>::
7164 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7165 can_plt_call
= true;
7170 // If we don't have a branch and link followed by a nop,
7171 // we can't go via the plt because there is no place to
7172 // put a toc restoring instruction.
7173 // Unless we know we won't be returning.
7174 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7175 can_plt_call
= true;
7179 // g++ as of 20130507 emits self-calls without a
7180 // following nop. This is arguably wrong since we have
7181 // conflicting information. On the one hand a global
7182 // symbol and on the other a local call sequence, but
7183 // don't error for this special case.
7184 // It isn't possible to cheaply verify we have exactly
7185 // such a call. Allow all calls to the same section.
7187 Address code
= value
;
7188 if (gsym
->source() == Symbol::FROM_OBJECT
7189 && gsym
->object() == object
)
7191 unsigned int dest_shndx
= 0;
7192 if (target
->abiversion() < 2)
7194 Address addend
= rela
.get_r_addend();
7195 code
= psymval
->value(object
, addend
);
7196 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7197 &code
, &dest_shndx
);
7200 if (dest_shndx
== 0)
7201 dest_shndx
= gsym
->shndx(&is_ordinary
);
7202 ok
= dest_shndx
== relinfo
->data_shndx
;
7206 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7207 _("call lacks nop, can't restore toc; "
7208 "recompile with -fPIC"));
7214 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7215 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7216 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7217 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7219 // First instruction of a global dynamic sequence, arg setup insn.
7220 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7221 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7222 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7223 if (tls_type
== tls::TLSOPT_NONE
)
7224 got_type
= GOT_TYPE_TLSGD
;
7225 else if (tls_type
== tls::TLSOPT_TO_IE
)
7226 got_type
= GOT_TYPE_TPREL
;
7227 if (got_type
!= GOT_TYPE_STANDARD
)
7231 gold_assert(gsym
->has_got_offset(got_type
));
7232 value
= gsym
->got_offset(got_type
);
7236 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7237 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7238 value
= object
->local_got_offset(r_sym
, got_type
);
7240 value
-= target
->got_section()->got_base_offset(object
);
7242 if (tls_type
== tls::TLSOPT_TO_IE
)
7244 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7245 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7247 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7248 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7249 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7251 insn
|= 32 << 26; // lwz
7253 insn
|= 58 << 26; // ld
7254 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7256 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7257 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7259 else if (tls_type
== tls::TLSOPT_TO_LE
)
7261 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7262 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7264 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7265 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7266 insn
&= (1 << 26) - (1 << 21); // extract rt
7271 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7272 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7273 value
= psymval
->value(object
, rela
.get_r_addend());
7277 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7279 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7280 r_type
= elfcpp::R_POWERPC_NONE
;
7284 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7285 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7286 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7287 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7289 // First instruction of a local dynamic sequence, arg setup insn.
7290 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7291 if (tls_type
== tls::TLSOPT_NONE
)
7293 value
= target
->tlsld_got_offset();
7294 value
-= target
->got_section()->got_base_offset(object
);
7298 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7299 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7300 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7302 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7303 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7304 insn
&= (1 << 26) - (1 << 21); // extract rt
7309 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7310 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7315 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7317 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7318 r_type
= elfcpp::R_POWERPC_NONE
;
7322 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7323 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7324 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7325 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7327 // Accesses relative to a local dynamic sequence address,
7328 // no optimisation here.
7331 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7332 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7336 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7337 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7338 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7340 value
-= target
->got_section()->got_base_offset(object
);
7342 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7343 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7344 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7345 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7347 // First instruction of initial exec sequence.
7348 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7349 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7350 if (tls_type
== tls::TLSOPT_NONE
)
7354 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7355 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7359 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7360 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7361 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7363 value
-= target
->got_section()->got_base_offset(object
);
7367 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7368 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7369 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7371 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7372 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7373 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7378 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7379 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7380 value
= psymval
->value(object
, rela
.get_r_addend());
7384 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7386 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7387 r_type
= elfcpp::R_POWERPC_NONE
;
7391 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7392 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7394 // Second instruction of a global dynamic sequence,
7395 // the __tls_get_addr call
7396 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7397 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7398 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7399 if (tls_type
!= tls::TLSOPT_NONE
)
7401 if (tls_type
== tls::TLSOPT_TO_IE
)
7403 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7404 Insn insn
= add_3_3_13
;
7407 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7408 r_type
= elfcpp::R_POWERPC_NONE
;
7412 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7413 Insn insn
= addi_3_3
;
7414 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7415 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7417 value
= psymval
->value(object
, rela
.get_r_addend());
7419 this->skip_next_tls_get_addr_call();
7422 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7423 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7425 // Second instruction of a local dynamic sequence,
7426 // the __tls_get_addr call
7427 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7428 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7429 if (tls_type
== tls::TLSOPT_TO_LE
)
7431 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7432 Insn insn
= addi_3_3
;
7433 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7434 this->skip_next_tls_get_addr_call();
7435 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7440 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7442 // Second instruction of an initial exec sequence
7443 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7444 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7445 if (tls_type
== tls::TLSOPT_TO_LE
)
7447 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7448 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7449 unsigned int reg
= size
== 32 ? 2 : 13;
7450 insn
= at_tls_transform(insn
, reg
);
7451 gold_assert(insn
!= 0);
7452 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7453 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7455 value
= psymval
->value(object
, rela
.get_r_addend());
7458 else if (!has_stub_value
)
7461 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
7462 addend
= rela
.get_r_addend();
7463 value
= psymval
->value(object
, addend
);
7464 if (size
== 64 && is_branch_reloc(r_type
))
7466 if (target
->abiversion() >= 2)
7469 value
+= object
->ppc64_local_entry_offset(gsym
);
7471 value
+= object
->ppc64_local_entry_offset(r_sym
);
7475 unsigned int dest_shndx
;
7476 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7477 &value
, &dest_shndx
);
7480 Address max_branch_offset
= max_branch_delta(r_type
);
7481 if (max_branch_offset
!= 0
7482 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7484 Stub_table
<size
, big_endian
>* stub_table
7485 = object
->stub_table(relinfo
->data_shndx
);
7486 if (stub_table
!= NULL
)
7488 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7489 if (off
!= invalid_address
)
7491 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7493 has_stub_value
= true;
7501 case elfcpp::R_PPC64_REL64
:
7502 case elfcpp::R_POWERPC_REL32
:
7503 case elfcpp::R_POWERPC_REL24
:
7504 case elfcpp::R_PPC_PLTREL24
:
7505 case elfcpp::R_PPC_LOCAL24PC
:
7506 case elfcpp::R_POWERPC_REL16
:
7507 case elfcpp::R_POWERPC_REL16_LO
:
7508 case elfcpp::R_POWERPC_REL16_HI
:
7509 case elfcpp::R_POWERPC_REL16_HA
:
7510 case elfcpp::R_POWERPC_REL16DX_HA
:
7511 case elfcpp::R_POWERPC_REL14
:
7512 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7513 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7517 case elfcpp::R_PPC64_TOC16
:
7518 case elfcpp::R_PPC64_TOC16_LO
:
7519 case elfcpp::R_PPC64_TOC16_HI
:
7520 case elfcpp::R_PPC64_TOC16_HA
:
7521 case elfcpp::R_PPC64_TOC16_DS
:
7522 case elfcpp::R_PPC64_TOC16_LO_DS
:
7523 // Subtract the TOC base address.
7524 value
-= (target
->got_section()->output_section()->address()
7525 + object
->toc_base_offset());
7528 case elfcpp::R_POWERPC_SECTOFF
:
7529 case elfcpp::R_POWERPC_SECTOFF_LO
:
7530 case elfcpp::R_POWERPC_SECTOFF_HI
:
7531 case elfcpp::R_POWERPC_SECTOFF_HA
:
7532 case elfcpp::R_PPC64_SECTOFF_DS
:
7533 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7535 value
-= os
->address();
7538 case elfcpp::R_PPC64_TPREL16_DS
:
7539 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7540 case elfcpp::R_PPC64_TPREL16_HIGH
:
7541 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7543 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7545 case elfcpp::R_POWERPC_TPREL16
:
7546 case elfcpp::R_POWERPC_TPREL16_LO
:
7547 case elfcpp::R_POWERPC_TPREL16_HI
:
7548 case elfcpp::R_POWERPC_TPREL16_HA
:
7549 case elfcpp::R_POWERPC_TPREL
:
7550 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7551 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7552 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7553 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7554 // tls symbol values are relative to tls_segment()->vaddr()
7558 case elfcpp::R_PPC64_DTPREL16_DS
:
7559 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7560 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7561 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7562 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7563 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7565 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7566 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7568 case elfcpp::R_POWERPC_DTPREL16
:
7569 case elfcpp::R_POWERPC_DTPREL16_LO
:
7570 case elfcpp::R_POWERPC_DTPREL16_HI
:
7571 case elfcpp::R_POWERPC_DTPREL16_HA
:
7572 case elfcpp::R_POWERPC_DTPREL
:
7573 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7574 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7575 // tls symbol values are relative to tls_segment()->vaddr()
7576 value
-= dtp_offset
;
7579 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7581 value
+= object
->ppc64_local_entry_offset(gsym
);
7583 value
+= object
->ppc64_local_entry_offset(r_sym
);
7590 Insn branch_bit
= 0;
7593 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7594 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7595 branch_bit
= 1 << 21;
7596 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7597 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7599 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7600 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7603 if (this->is_isa_v2
)
7605 // Set 'a' bit. This is 0b00010 in BO field for branch
7606 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7607 // for branch on CTR insns (BO == 1a00t or 1a01t).
7608 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7610 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7617 // Invert 'y' bit if not the default.
7618 if (static_cast<Signed_address
>(value
) < 0)
7621 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7631 // Multi-instruction sequences that access the TOC can be
7632 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7633 // to nop; addi rb,r2,x;
7639 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7640 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7641 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7642 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7643 case elfcpp::R_POWERPC_GOT16_HA
:
7644 case elfcpp::R_PPC64_TOC16_HA
:
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 ((insn
& ((0x3f << 26) | 0x1f << 16))
7650 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7651 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7652 _("toc optimization is not supported "
7653 "for %#08x instruction"), insn
);
7654 else if (value
+ 0x8000 < 0x10000)
7656 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7662 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7663 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7664 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7665 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7666 case elfcpp::R_POWERPC_GOT16_LO
:
7667 case elfcpp::R_PPC64_GOT16_LO_DS
:
7668 case elfcpp::R_PPC64_TOC16_LO
:
7669 case elfcpp::R_PPC64_TOC16_LO_DS
:
7670 if (parameters
->options().toc_optimize())
7672 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7673 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7674 if (!ok_lo_toc_insn(insn
))
7675 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7676 _("toc optimization is not supported "
7677 "for %#08x instruction"), insn
);
7678 else if (value
+ 0x8000 < 0x10000)
7680 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7682 // Transform addic to addi when we change reg.
7683 insn
&= ~((0x3f << 26) | (0x1f << 16));
7684 insn
|= (14u << 26) | (2 << 16);
7688 insn
&= ~(0x1f << 16);
7691 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7696 case elfcpp::R_PPC64_ENTRY
:
7697 value
= (target
->got_section()->output_section()->address()
7698 + object
->toc_base_offset());
7699 if (value
+ 0x80008000 <= 0xffffffff
7700 && !parameters
->options().output_is_position_independent())
7702 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7703 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7704 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
7706 if ((insn1
& ~0xfffc) == ld_2_12
7707 && insn2
== add_2_2_12
)
7709 insn1
= lis_2
+ ha(value
);
7710 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
7711 insn2
= addi_2_2
+ l(value
);
7712 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
7719 if (value
+ 0x80008000 <= 0xffffffff)
7721 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7722 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7723 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
7725 if ((insn1
& ~0xfffc) == ld_2_12
7726 && insn2
== add_2_2_12
)
7728 insn1
= addis_2_12
+ ha(value
);
7729 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
7730 insn2
= addi_2_2
+ l(value
);
7731 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
7738 case elfcpp::R_POWERPC_REL16_LO
:
7739 // If we are generating a non-PIC executable, edit
7740 // 0: addis 2,12,.TOC.-0b@ha
7741 // addi 2,2,.TOC.-0b@l
7742 // used by ELFv2 global entry points to set up r2, to
7745 // if .TOC. is in range. */
7746 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
7749 && target
->abiversion() >= 2
7750 && !parameters
->options().output_is_position_independent()
7751 && rela
.get_r_addend() == d_offset
+ 4
7753 && strcmp(gsym
->name(), ".TOC.") == 0)
7755 const int reloc_size
7756 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
7757 Reltype
prev_rela(preloc
- reloc_size
);
7758 if ((prev_rela
.get_r_info()
7759 == elfcpp::elf_r_info
<size
>(r_sym
,
7760 elfcpp::R_POWERPC_REL16_HA
))
7761 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
7762 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
7764 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7765 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
7766 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7768 if ((insn1
& 0xffff0000) == addis_2_12
7769 && (insn2
& 0xffff0000) == addi_2_2
)
7771 insn1
= lis_2
+ ha(value
+ address
- 4);
7772 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
7773 insn2
= addi_2_2
+ l(value
+ address
- 4);
7774 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
7777 relinfo
->rr
->set_strategy(relnum
- 1,
7778 Relocatable_relocs::RELOC_SPECIAL
);
7779 relinfo
->rr
->set_strategy(relnum
,
7780 Relocatable_relocs::RELOC_SPECIAL
);
7790 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7791 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
7794 case elfcpp::R_POWERPC_ADDR32
:
7795 case elfcpp::R_POWERPC_UADDR32
:
7797 overflow
= Reloc::CHECK_BITFIELD
;
7800 case elfcpp::R_POWERPC_REL32
:
7801 case elfcpp::R_POWERPC_REL16DX_HA
:
7803 overflow
= Reloc::CHECK_SIGNED
;
7806 case elfcpp::R_POWERPC_UADDR16
:
7807 overflow
= Reloc::CHECK_BITFIELD
;
7810 case elfcpp::R_POWERPC_ADDR16
:
7811 // We really should have three separate relocations,
7812 // one for 16-bit data, one for insns with 16-bit signed fields,
7813 // and one for insns with 16-bit unsigned fields.
7814 overflow
= Reloc::CHECK_BITFIELD
;
7815 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
7816 overflow
= Reloc::CHECK_LOW_INSN
;
7819 case elfcpp::R_POWERPC_ADDR16_HI
:
7820 case elfcpp::R_POWERPC_ADDR16_HA
:
7821 case elfcpp::R_POWERPC_GOT16_HI
:
7822 case elfcpp::R_POWERPC_GOT16_HA
:
7823 case elfcpp::R_POWERPC_PLT16_HI
:
7824 case elfcpp::R_POWERPC_PLT16_HA
:
7825 case elfcpp::R_POWERPC_SECTOFF_HI
:
7826 case elfcpp::R_POWERPC_SECTOFF_HA
:
7827 case elfcpp::R_PPC64_TOC16_HI
:
7828 case elfcpp::R_PPC64_TOC16_HA
:
7829 case elfcpp::R_PPC64_PLTGOT16_HI
:
7830 case elfcpp::R_PPC64_PLTGOT16_HA
:
7831 case elfcpp::R_POWERPC_TPREL16_HI
:
7832 case elfcpp::R_POWERPC_TPREL16_HA
:
7833 case elfcpp::R_POWERPC_DTPREL16_HI
:
7834 case elfcpp::R_POWERPC_DTPREL16_HA
:
7835 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7836 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7837 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7838 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7839 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7840 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7841 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7842 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7843 case elfcpp::R_POWERPC_REL16_HI
:
7844 case elfcpp::R_POWERPC_REL16_HA
:
7846 overflow
= Reloc::CHECK_HIGH_INSN
;
7849 case elfcpp::R_POWERPC_REL16
:
7850 case elfcpp::R_PPC64_TOC16
:
7851 case elfcpp::R_POWERPC_GOT16
:
7852 case elfcpp::R_POWERPC_SECTOFF
:
7853 case elfcpp::R_POWERPC_TPREL16
:
7854 case elfcpp::R_POWERPC_DTPREL16
:
7855 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7856 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7857 case elfcpp::R_POWERPC_GOT_TPREL16
:
7858 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7859 overflow
= Reloc::CHECK_LOW_INSN
;
7862 case elfcpp::R_POWERPC_ADDR24
:
7863 case elfcpp::R_POWERPC_ADDR14
:
7864 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7865 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7866 case elfcpp::R_PPC64_ADDR16_DS
:
7867 case elfcpp::R_POWERPC_REL24
:
7868 case elfcpp::R_PPC_PLTREL24
:
7869 case elfcpp::R_PPC_LOCAL24PC
:
7870 case elfcpp::R_PPC64_TPREL16_DS
:
7871 case elfcpp::R_PPC64_DTPREL16_DS
:
7872 case elfcpp::R_PPC64_TOC16_DS
:
7873 case elfcpp::R_PPC64_GOT16_DS
:
7874 case elfcpp::R_PPC64_SECTOFF_DS
:
7875 case elfcpp::R_POWERPC_REL14
:
7876 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7877 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7878 overflow
= Reloc::CHECK_SIGNED
;
7882 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
7885 if (overflow
== Reloc::CHECK_LOW_INSN
7886 || overflow
== Reloc::CHECK_HIGH_INSN
)
7888 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7890 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
7891 overflow
= Reloc::CHECK_BITFIELD
;
7892 else if (overflow
== Reloc::CHECK_LOW_INSN
7893 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
7894 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
7895 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
7896 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
7897 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
7898 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
7899 overflow
= Reloc::CHECK_UNSIGNED
;
7901 overflow
= Reloc::CHECK_SIGNED
;
7904 bool maybe_dq_reloc
= false;
7905 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7906 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7909 case elfcpp::R_POWERPC_NONE
:
7910 case elfcpp::R_POWERPC_TLS
:
7911 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7912 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7915 case elfcpp::R_PPC64_ADDR64
:
7916 case elfcpp::R_PPC64_REL64
:
7917 case elfcpp::R_PPC64_TOC
:
7918 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7919 Reloc::addr64(view
, value
);
7922 case elfcpp::R_POWERPC_TPREL
:
7923 case elfcpp::R_POWERPC_DTPREL
:
7925 Reloc::addr64(view
, value
);
7927 status
= Reloc::addr32(view
, value
, overflow
);
7930 case elfcpp::R_PPC64_UADDR64
:
7931 Reloc::addr64_u(view
, value
);
7934 case elfcpp::R_POWERPC_ADDR32
:
7935 status
= Reloc::addr32(view
, value
, overflow
);
7938 case elfcpp::R_POWERPC_REL32
:
7939 case elfcpp::R_POWERPC_UADDR32
:
7940 status
= Reloc::addr32_u(view
, value
, overflow
);
7943 case elfcpp::R_POWERPC_ADDR24
:
7944 case elfcpp::R_POWERPC_REL24
:
7945 case elfcpp::R_PPC_PLTREL24
:
7946 case elfcpp::R_PPC_LOCAL24PC
:
7947 status
= Reloc::addr24(view
, value
, overflow
);
7950 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7951 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7952 case elfcpp::R_POWERPC_GOT_TPREL16
:
7953 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7956 // On ppc64 these are all ds form
7957 maybe_dq_reloc
= true;
7960 case elfcpp::R_POWERPC_ADDR16
:
7961 case elfcpp::R_POWERPC_REL16
:
7962 case elfcpp::R_PPC64_TOC16
:
7963 case elfcpp::R_POWERPC_GOT16
:
7964 case elfcpp::R_POWERPC_SECTOFF
:
7965 case elfcpp::R_POWERPC_TPREL16
:
7966 case elfcpp::R_POWERPC_DTPREL16
:
7967 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7968 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7969 case elfcpp::R_POWERPC_ADDR16_LO
:
7970 case elfcpp::R_POWERPC_REL16_LO
:
7971 case elfcpp::R_PPC64_TOC16_LO
:
7972 case elfcpp::R_POWERPC_GOT16_LO
:
7973 case elfcpp::R_POWERPC_SECTOFF_LO
:
7974 case elfcpp::R_POWERPC_TPREL16_LO
:
7975 case elfcpp::R_POWERPC_DTPREL16_LO
:
7976 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7977 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7979 status
= Reloc::addr16(view
, value
, overflow
);
7981 maybe_dq_reloc
= true;
7984 case elfcpp::R_POWERPC_UADDR16
:
7985 status
= Reloc::addr16_u(view
, value
, overflow
);
7988 case elfcpp::R_PPC64_ADDR16_HIGH
:
7989 case elfcpp::R_PPC64_TPREL16_HIGH
:
7990 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7992 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7994 case elfcpp::R_POWERPC_ADDR16_HI
:
7995 case elfcpp::R_POWERPC_REL16_HI
:
7996 case elfcpp::R_PPC64_TOC16_HI
:
7997 case elfcpp::R_POWERPC_GOT16_HI
:
7998 case elfcpp::R_POWERPC_SECTOFF_HI
:
7999 case elfcpp::R_POWERPC_TPREL16_HI
:
8000 case elfcpp::R_POWERPC_DTPREL16_HI
:
8001 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
8002 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
8003 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
8004 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
8005 Reloc::addr16_hi(view
, value
);
8008 case elfcpp::R_PPC64_ADDR16_HIGHA
:
8009 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8010 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8012 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
8014 case elfcpp::R_POWERPC_ADDR16_HA
:
8015 case elfcpp::R_POWERPC_REL16_HA
:
8016 case elfcpp::R_PPC64_TOC16_HA
:
8017 case elfcpp::R_POWERPC_GOT16_HA
:
8018 case elfcpp::R_POWERPC_SECTOFF_HA
:
8019 case elfcpp::R_POWERPC_TPREL16_HA
:
8020 case elfcpp::R_POWERPC_DTPREL16_HA
:
8021 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8022 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8023 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8024 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8025 Reloc::addr16_ha(view
, value
);
8028 case elfcpp::R_POWERPC_REL16DX_HA
:
8029 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
8032 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8034 // R_PPC_EMB_NADDR16_LO
8036 case elfcpp::R_PPC64_ADDR16_HIGHER
:
8037 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8038 Reloc::addr16_hi2(view
, value
);
8041 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8043 // R_PPC_EMB_NADDR16_HI
8045 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
8046 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8047 Reloc::addr16_ha2(view
, value
);
8050 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8052 // R_PPC_EMB_NADDR16_HA
8054 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
8055 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8056 Reloc::addr16_hi3(view
, value
);
8059 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8063 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
8064 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8065 Reloc::addr16_ha3(view
, value
);
8068 case elfcpp::R_PPC64_DTPREL16_DS
:
8069 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8071 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
8073 case elfcpp::R_PPC64_TPREL16_DS
:
8074 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8076 // R_PPC_TLSGD, R_PPC_TLSLD
8078 case elfcpp::R_PPC64_ADDR16_DS
:
8079 case elfcpp::R_PPC64_ADDR16_LO_DS
:
8080 case elfcpp::R_PPC64_TOC16_DS
:
8081 case elfcpp::R_PPC64_TOC16_LO_DS
:
8082 case elfcpp::R_PPC64_GOT16_DS
:
8083 case elfcpp::R_PPC64_GOT16_LO_DS
:
8084 case elfcpp::R_PPC64_SECTOFF_DS
:
8085 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8086 maybe_dq_reloc
= true;
8089 case elfcpp::R_POWERPC_ADDR14
:
8090 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8091 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8092 case elfcpp::R_POWERPC_REL14
:
8093 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8094 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8095 status
= Reloc::addr14(view
, value
, overflow
);
8098 case elfcpp::R_POWERPC_COPY
:
8099 case elfcpp::R_POWERPC_GLOB_DAT
:
8100 case elfcpp::R_POWERPC_JMP_SLOT
:
8101 case elfcpp::R_POWERPC_RELATIVE
:
8102 case elfcpp::R_POWERPC_DTPMOD
:
8103 case elfcpp::R_PPC64_JMP_IREL
:
8104 case elfcpp::R_POWERPC_IRELATIVE
:
8105 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8106 _("unexpected reloc %u in object file"),
8110 case elfcpp::R_PPC_EMB_SDA21
:
8115 // R_PPC64_TOCSAVE. For the time being this can be ignored.
8119 case elfcpp::R_PPC_EMB_SDA2I16
:
8120 case elfcpp::R_PPC_EMB_SDA2REL
:
8123 // R_PPC64_TLSGD, R_PPC64_TLSLD
8126 case elfcpp::R_POWERPC_PLT32
:
8127 case elfcpp::R_POWERPC_PLTREL32
:
8128 case elfcpp::R_POWERPC_PLT16_LO
:
8129 case elfcpp::R_POWERPC_PLT16_HI
:
8130 case elfcpp::R_POWERPC_PLT16_HA
:
8131 case elfcpp::R_PPC_SDAREL16
:
8132 case elfcpp::R_POWERPC_ADDR30
:
8133 case elfcpp::R_PPC64_PLT64
:
8134 case elfcpp::R_PPC64_PLTREL64
:
8135 case elfcpp::R_PPC64_PLTGOT16
:
8136 case elfcpp::R_PPC64_PLTGOT16_LO
:
8137 case elfcpp::R_PPC64_PLTGOT16_HI
:
8138 case elfcpp::R_PPC64_PLTGOT16_HA
:
8139 case elfcpp::R_PPC64_PLT16_LO_DS
:
8140 case elfcpp::R_PPC64_PLTGOT16_DS
:
8141 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
8142 case elfcpp::R_PPC_EMB_RELSDA
:
8143 case elfcpp::R_PPC_TOC16
:
8146 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8147 _("unsupported reloc %u"),
8155 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8157 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
8158 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8159 && (insn
& 3) == 1))
8160 status
= Reloc::addr16_dq(view
, value
, overflow
);
8162 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8163 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8164 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
8165 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
8166 status
= Reloc::addr16_ds(view
, value
, overflow
);
8168 status
= Reloc::addr16(view
, value
, overflow
);
8171 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
8174 && gsym
->is_undefined()
8175 && is_branch_reloc(r_type
))))
8177 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8178 _("relocation overflow"));
8180 gold_info(_("try relinking with a smaller --stub-group-size"));
8186 // Relocate section data.
8188 template<int size
, bool big_endian
>
8190 Target_powerpc
<size
, big_endian
>::relocate_section(
8191 const Relocate_info
<size
, big_endian
>* relinfo
,
8192 unsigned int sh_type
,
8193 const unsigned char* prelocs
,
8195 Output_section
* output_section
,
8196 bool needs_special_offset_handling
,
8197 unsigned char* view
,
8199 section_size_type view_size
,
8200 const Reloc_symbol_changes
* reloc_symbol_changes
)
8202 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8203 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
8204 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
8205 Powerpc_comdat_behavior
;
8206 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8209 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8211 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
8212 Powerpc_comdat_behavior
, Classify_reloc
>(
8218 needs_special_offset_handling
,
8222 reloc_symbol_changes
);
8225 template<int size
, bool big_endian
>
8226 class Powerpc_scan_relocatable_reloc
8229 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8231 static const int reloc_size
=
8232 Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8233 static const int sh_type
= elfcpp::SHT_RELA
;
8235 // Return the symbol referred to by the relocation.
8236 static inline unsigned int
8237 get_r_sym(const Reltype
* reloc
)
8238 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
8240 // Return the type of the relocation.
8241 static inline unsigned int
8242 get_r_type(const Reltype
* reloc
)
8243 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
8245 // Return the strategy to use for a local symbol which is not a
8246 // section symbol, given the relocation type.
8247 inline Relocatable_relocs::Reloc_strategy
8248 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
8250 if (r_type
== 0 && r_sym
== 0)
8251 return Relocatable_relocs::RELOC_DISCARD
;
8252 return Relocatable_relocs::RELOC_COPY
;
8255 // Return the strategy to use for a local symbol which is a section
8256 // symbol, given the relocation type.
8257 inline Relocatable_relocs::Reloc_strategy
8258 local_section_strategy(unsigned int, Relobj
*)
8260 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
8263 // Return the strategy to use for a global symbol, given the
8264 // relocation type, the object, and the symbol index.
8265 inline Relocatable_relocs::Reloc_strategy
8266 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8268 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8269 return Relocatable_relocs::RELOC_SPECIAL
;
8270 return Relocatable_relocs::RELOC_COPY
;
8274 // Scan the relocs during a relocatable link.
8276 template<int size
, bool big_endian
>
8278 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8279 Symbol_table
* symtab
,
8281 Sized_relobj_file
<size
, big_endian
>* object
,
8282 unsigned int data_shndx
,
8283 unsigned int sh_type
,
8284 const unsigned char* prelocs
,
8286 Output_section
* output_section
,
8287 bool needs_special_offset_handling
,
8288 size_t local_symbol_count
,
8289 const unsigned char* plocal_symbols
,
8290 Relocatable_relocs
* rr
)
8292 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
8294 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8296 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
8304 needs_special_offset_handling
,
8310 // Scan the relocs for --emit-relocs.
8312 template<int size
, bool big_endian
>
8314 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
8315 Symbol_table
* symtab
,
8317 Sized_relobj_file
<size
, big_endian
>* object
,
8318 unsigned int data_shndx
,
8319 unsigned int sh_type
,
8320 const unsigned char* prelocs
,
8322 Output_section
* output_section
,
8323 bool needs_special_offset_handling
,
8324 size_t local_symbol_count
,
8325 const unsigned char* plocal_syms
,
8326 Relocatable_relocs
* rr
)
8328 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8330 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
8331 Emit_relocs_strategy
;
8333 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8335 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
8343 needs_special_offset_handling
,
8349 // Emit relocations for a section.
8350 // This is a modified version of the function by the same name in
8351 // target-reloc.h. Using relocate_special_relocatable for
8352 // R_PPC_PLTREL24 would require duplication of the entire body of the
8353 // loop, so we may as well duplicate the whole thing.
8355 template<int size
, bool big_endian
>
8357 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8358 const Relocate_info
<size
, big_endian
>* relinfo
,
8359 unsigned int sh_type
,
8360 const unsigned char* prelocs
,
8362 Output_section
* output_section
,
8363 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8365 Address view_address
,
8367 unsigned char* reloc_view
,
8368 section_size_type reloc_view_size
)
8370 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8372 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8374 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
8376 const int reloc_size
8377 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8378 // Offset from start of insn to d-field reloc.
8379 const int d_offset
= big_endian
? 2 : 0;
8381 Powerpc_relobj
<size
, big_endian
>* const object
8382 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8383 const unsigned int local_count
= object
->local_symbol_count();
8384 unsigned int got2_shndx
= object
->got2_shndx();
8385 Address got2_addend
= 0;
8386 if (got2_shndx
!= 0)
8388 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8389 gold_assert(got2_addend
!= invalid_address
);
8392 unsigned char* pwrite
= reloc_view
;
8393 bool zap_next
= false;
8394 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8396 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
8397 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8400 Reltype
reloc(prelocs
);
8401 Reltype_write
reloc_write(pwrite
);
8403 Address offset
= reloc
.get_r_offset();
8404 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8405 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8406 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8407 const unsigned int orig_r_sym
= r_sym
;
8408 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8409 = reloc
.get_r_addend();
8410 const Symbol
* gsym
= NULL
;
8414 // We could arrange to discard these and other relocs for
8415 // tls optimised sequences in the strategy methods, but for
8416 // now do as BFD ld does.
8417 r_type
= elfcpp::R_POWERPC_NONE
;
8421 // Get the new symbol index.
8422 Output_section
* os
= NULL
;
8423 if (r_sym
< local_count
)
8427 case Relocatable_relocs::RELOC_COPY
:
8428 case Relocatable_relocs::RELOC_SPECIAL
:
8431 r_sym
= object
->symtab_index(r_sym
);
8432 gold_assert(r_sym
!= -1U);
8436 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
8438 // We are adjusting a section symbol. We need to find
8439 // the symbol table index of the section symbol for
8440 // the output section corresponding to input section
8441 // in which this symbol is defined.
8442 gold_assert(r_sym
< local_count
);
8444 unsigned int shndx
=
8445 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8446 gold_assert(is_ordinary
);
8447 os
= object
->output_section(shndx
);
8448 gold_assert(os
!= NULL
);
8449 gold_assert(os
->needs_symtab_index());
8450 r_sym
= os
->symtab_index();
8460 gsym
= object
->global_symbol(r_sym
);
8461 gold_assert(gsym
!= NULL
);
8462 if (gsym
->is_forwarder())
8463 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
8465 gold_assert(gsym
->has_symtab_index());
8466 r_sym
= gsym
->symtab_index();
8469 // Get the new offset--the location in the output section where
8470 // this relocation should be applied.
8471 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8472 offset
+= offset_in_output_section
;
8475 section_offset_type sot_offset
=
8476 convert_types
<section_offset_type
, Address
>(offset
);
8477 section_offset_type new_sot_offset
=
8478 output_section
->output_offset(object
, relinfo
->data_shndx
,
8480 gold_assert(new_sot_offset
!= -1);
8481 offset
= new_sot_offset
;
8484 // In an object file, r_offset is an offset within the section.
8485 // In an executable or dynamic object, generated by
8486 // --emit-relocs, r_offset is an absolute address.
8487 if (!parameters
->options().relocatable())
8489 offset
+= view_address
;
8490 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8491 offset
-= offset_in_output_section
;
8494 // Handle the reloc addend based on the strategy.
8495 if (strategy
== Relocatable_relocs::RELOC_COPY
)
8497 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
8499 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
8500 gold_assert(os
!= NULL
);
8501 addend
= psymval
->value(object
, addend
) - os
->address();
8503 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
8507 if (addend
>= 32768)
8508 addend
+= got2_addend
;
8510 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
8512 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
8515 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
8517 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
8518 addend
-= d_offset
+ 4;
8524 if (!parameters
->options().relocatable())
8526 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8527 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8528 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8529 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8531 // First instruction of a global dynamic sequence,
8533 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8534 switch (this->optimize_tls_gd(final
))
8536 case tls::TLSOPT_TO_IE
:
8537 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8538 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8540 case tls::TLSOPT_TO_LE
:
8541 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8542 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8543 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8546 r_type
= elfcpp::R_POWERPC_NONE
;
8554 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8555 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8556 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8557 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8559 // First instruction of a local dynamic sequence,
8561 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8563 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8564 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8566 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8567 const Output_section
* os
= relinfo
->layout
->tls_segment()
8569 gold_assert(os
!= NULL
);
8570 gold_assert(os
->needs_symtab_index());
8571 r_sym
= os
->symtab_index();
8572 addend
= dtp_offset
;
8576 r_type
= elfcpp::R_POWERPC_NONE
;
8581 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8582 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8583 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8584 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8586 // First instruction of initial exec sequence.
8587 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8588 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8590 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8591 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8592 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8595 r_type
= elfcpp::R_POWERPC_NONE
;
8600 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8601 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8603 // Second instruction of a global dynamic sequence,
8604 // the __tls_get_addr call
8605 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8606 switch (this->optimize_tls_gd(final
))
8608 case tls::TLSOPT_TO_IE
:
8609 r_type
= elfcpp::R_POWERPC_NONE
;
8612 case tls::TLSOPT_TO_LE
:
8613 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8621 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8622 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8624 // Second instruction of a local dynamic sequence,
8625 // the __tls_get_addr call
8626 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8628 const Output_section
* os
= relinfo
->layout
->tls_segment()
8630 gold_assert(os
!= NULL
);
8631 gold_assert(os
->needs_symtab_index());
8632 r_sym
= os
->symtab_index();
8633 addend
= dtp_offset
;
8634 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8639 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8641 // Second instruction of an initial exec sequence
8642 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8643 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8645 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8651 reloc_write
.put_r_offset(offset
);
8652 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
8653 reloc_write
.put_r_addend(addend
);
8655 pwrite
+= reloc_size
;
8658 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
8659 == reloc_view_size
);
8662 // Return the value to use for a dynamic symbol which requires special
8663 // treatment. This is how we support equality comparisons of function
8664 // pointers across shared library boundaries, as described in the
8665 // processor specific ABI supplement.
8667 template<int size
, bool big_endian
>
8669 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8673 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
8674 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8675 p
!= this->stub_tables_
.end();
8678 Address off
= (*p
)->find_plt_call_entry(gsym
);
8679 if (off
!= invalid_address
)
8680 return (*p
)->stub_address() + off
;
8683 else if (this->abiversion() >= 2)
8685 Address off
= this->glink_section()->find_global_entry(gsym
);
8686 if (off
!= invalid_address
)
8687 return this->glink_section()->global_entry_address() + off
;
8692 // Return the PLT address to use for a local symbol.
8693 template<int size
, bool big_endian
>
8695 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8696 const Relobj
* object
,
8697 unsigned int symndx
) const
8701 const Sized_relobj
<size
, big_endian
>* relobj
8702 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8703 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8704 p
!= this->stub_tables_
.end();
8707 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8709 if (off
!= invalid_address
)
8710 return (*p
)->stub_address() + off
;
8716 // Return the PLT address to use for a global symbol.
8717 template<int size
, bool big_endian
>
8719 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8720 const Symbol
* gsym
) const
8724 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8725 p
!= this->stub_tables_
.end();
8728 Address off
= (*p
)->find_plt_call_entry(gsym
);
8729 if (off
!= invalid_address
)
8730 return (*p
)->stub_address() + off
;
8733 else if (this->abiversion() >= 2)
8735 Address off
= this->glink_section()->find_global_entry(gsym
);
8736 if (off
!= invalid_address
)
8737 return this->glink_section()->global_entry_address() + off
;
8742 // Return the offset to use for the GOT_INDX'th got entry which is
8743 // for a local tls symbol specified by OBJECT, SYMNDX.
8744 template<int size
, bool big_endian
>
8746 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8747 const Relobj
* object
,
8748 unsigned int symndx
,
8749 unsigned int got_indx
) const
8751 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8752 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8753 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8755 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8756 got_type
<= GOT_TYPE_TPREL
;
8757 got_type
= Got_type(got_type
+ 1))
8758 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8760 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8761 if (got_type
== GOT_TYPE_TLSGD
)
8763 if (off
== got_indx
* (size
/ 8))
8765 if (got_type
== GOT_TYPE_TPREL
)
8775 // Return the offset to use for the GOT_INDX'th got entry which is
8776 // for global tls symbol GSYM.
8777 template<int size
, bool big_endian
>
8779 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8781 unsigned int got_indx
) const
8783 if (gsym
->type() == elfcpp::STT_TLS
)
8785 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8786 got_type
<= GOT_TYPE_TPREL
;
8787 got_type
= Got_type(got_type
+ 1))
8788 if (gsym
->has_got_offset(got_type
))
8790 unsigned int off
= gsym
->got_offset(got_type
);
8791 if (got_type
== GOT_TYPE_TLSGD
)
8793 if (off
== got_indx
* (size
/ 8))
8795 if (got_type
== GOT_TYPE_TPREL
)
8805 // The selector for powerpc object files.
8807 template<int size
, bool big_endian
>
8808 class Target_selector_powerpc
: public Target_selector
8811 Target_selector_powerpc()
8812 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8815 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8816 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8818 ? (big_endian
? "elf64ppc" : "elf64lppc")
8819 : (big_endian
? "elf32ppc" : "elf32lppc")))
8823 do_instantiate_target()
8824 { return new Target_powerpc
<size
, big_endian
>(); }
8827 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8828 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8829 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8830 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8832 // Instantiate these constants for -O0
8833 template<int size
, bool big_endian
>
8834 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8835 template<int size
, bool big_endian
>
8836 const typename Output_data_glink
<size
, big_endian
>::Address
8837 Output_data_glink
<size
, big_endian
>::invalid_address
;
8838 template<int size
, bool big_endian
>
8839 const typename Stub_table
<size
, big_endian
>::Address
8840 Stub_table
<size
, big_endian
>::invalid_address
;
8841 template<int size
, bool big_endian
>
8842 const typename Target_powerpc
<size
, big_endian
>::Address
8843 Target_powerpc
<size
, big_endian
>::invalid_address
;
8845 } // End anonymous namespace.