1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012, 2013 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
>
66 is_branch_reloc(unsigned int r_type
);
68 template<int size
, bool big_endian
>
69 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
72 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
73 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
74 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
76 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
77 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
78 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
79 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
80 opd_ent_(), access_from_map_(), has14_(), stub_table_(),
81 e_flags_(ehdr
.get_e_flags()), st_other_()
83 this->set_abiversion(0);
89 // Read the symbols then set up st_other vector.
91 do_read_symbols(Read_symbols_data
*);
93 // The .got2 section shndx.
98 return this->special_
;
103 // The .opd section shndx.
110 return this->special_
;
113 // Init OPD entry arrays.
115 init_opd(size_t opd_size
)
117 size_t count
= this->opd_ent_ndx(opd_size
);
118 this->opd_ent_
.resize(count
);
121 // Return section and offset of function entry for .opd + R_OFF.
123 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
125 size_t ndx
= this->opd_ent_ndx(r_off
);
126 gold_assert(ndx
< this->opd_ent_
.size());
127 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
129 *value
= this->opd_ent_
[ndx
].off
;
130 return this->opd_ent_
[ndx
].shndx
;
133 // Set section and offset of function entry for .opd + R_OFF.
135 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
137 size_t ndx
= this->opd_ent_ndx(r_off
);
138 gold_assert(ndx
< this->opd_ent_
.size());
139 this->opd_ent_
[ndx
].shndx
= shndx
;
140 this->opd_ent_
[ndx
].off
= value
;
143 // Return discard flag for .opd + R_OFF.
145 get_opd_discard(Address r_off
) const
147 size_t ndx
= this->opd_ent_ndx(r_off
);
148 gold_assert(ndx
< this->opd_ent_
.size());
149 return this->opd_ent_
[ndx
].discard
;
152 // Set discard flag for .opd + R_OFF.
154 set_opd_discard(Address r_off
)
156 size_t ndx
= this->opd_ent_ndx(r_off
);
157 gold_assert(ndx
< this->opd_ent_
.size());
158 this->opd_ent_
[ndx
].discard
= true;
163 { return this->opd_valid_
; }
167 { this->opd_valid_
= true; }
169 // Examine .rela.opd to build info about function entry points.
171 scan_opd_relocs(size_t reloc_count
,
172 const unsigned char* prelocs
,
173 const unsigned char* plocal_syms
);
175 // Perform the Sized_relobj_file method, then set up opd info from
178 do_read_relocs(Read_relocs_data
*);
181 do_find_special_sections(Read_symbols_data
* sd
);
183 // Adjust this local symbol value. Return false if the symbol
184 // should be discarded from the output file.
186 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
188 if (size
== 64 && this->opd_shndx() != 0)
191 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
193 if (this->get_opd_discard(lv
->input_value()))
201 { return &this->access_from_map_
; }
203 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
204 // section at DST_OFF.
206 add_reference(Object
* src_obj
,
207 unsigned int src_indx
,
208 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
210 Section_id
src_id(src_obj
, src_indx
);
211 this->access_from_map_
[dst_off
].insert(src_id
);
214 // Add a reference to the code section specified by the .opd entry
217 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
219 size_t ndx
= this->opd_ent_ndx(dst_off
);
220 if (ndx
>= this->opd_ent_
.size())
221 this->opd_ent_
.resize(ndx
+ 1);
222 this->opd_ent_
[ndx
].gc_mark
= true;
226 process_gc_mark(Symbol_table
* symtab
)
228 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
229 if (this->opd_ent_
[i
].gc_mark
)
231 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
232 symtab
->gc()->worklist().push(Section_id(this, shndx
));
236 // Return offset in output GOT section that this object will use
237 // as a TOC pointer. Won't be just a constant with multi-toc support.
239 toc_base_offset() const
243 set_has_small_toc_reloc()
244 { has_small_toc_reloc_
= true; }
247 has_small_toc_reloc() const
248 { return has_small_toc_reloc_
; }
251 set_has_14bit_branch(unsigned int shndx
)
253 if (shndx
>= this->has14_
.size())
254 this->has14_
.resize(shndx
+ 1);
255 this->has14_
[shndx
] = true;
259 has_14bit_branch(unsigned int shndx
) const
260 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
263 set_stub_table(unsigned int shndx
, Stub_table
<size
, big_endian
>* stub_table
)
265 if (shndx
>= this->stub_table_
.size())
266 this->stub_table_
.resize(shndx
+ 1);
267 this->stub_table_
[shndx
] = stub_table
;
270 Stub_table
<size
, big_endian
>*
271 stub_table(unsigned int shndx
)
273 if (shndx
< this->stub_table_
.size())
274 return this->stub_table_
[shndx
];
280 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
282 // Set ABI version for input and output
284 set_abiversion(int ver
);
287 ppc64_local_entry_offset(const Symbol
* sym
) const
288 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
291 ppc64_local_entry_offset(unsigned int symndx
) const
292 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
303 // Return index into opd_ent_ array for .opd entry at OFF.
304 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
305 // apart when the language doesn't use the last 8-byte word, the
306 // environment pointer. Thus dividing the entry section offset by
307 // 16 will give an index into opd_ent_ that works for either layout
308 // of .opd. (It leaves some elements of the vector unused when .opd
309 // entries are spaced 24 bytes apart, but we don't know the spacing
310 // until relocations are processed, and in any case it is possible
311 // for an object to have some entries spaced 16 bytes apart and
312 // others 24 bytes apart.)
314 opd_ent_ndx(size_t off
) const
317 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
318 unsigned int special_
;
320 // For 64-bit, whether this object uses small model relocs to access
322 bool has_small_toc_reloc_
;
324 // Set at the start of gc_process_relocs, when we know opd_ent_
325 // vector is valid. The flag could be made atomic and set in
326 // do_read_relocs with memory_order_release and then tested with
327 // memory_order_acquire, potentially resulting in fewer entries in
331 // The first 8-byte word of an OPD entry gives the address of the
332 // entry point of the function. Relocatable object files have a
333 // relocation on this word. The following vector records the
334 // section and offset specified by these relocations.
335 std::vector
<Opd_ent
> opd_ent_
;
337 // References made to this object's .opd section when running
338 // gc_process_relocs for another object, before the opd_ent_ vector
339 // is valid for this object.
340 Access_from access_from_map_
;
342 // Whether input section has a 14-bit branch reloc.
343 std::vector
<bool> has14_
;
345 // The stub table to use for a given input section.
346 std::vector
<Stub_table
<size
, big_endian
>*> stub_table_
;
349 elfcpp::Elf_Word e_flags_
;
351 // ELF st_other field for local symbols.
352 std::vector
<unsigned char> st_other_
;
355 template<int size
, bool big_endian
>
356 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
359 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
361 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
362 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
363 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
364 opd_shndx_(0), opd_ent_(), e_flags_(ehdr
.get_e_flags())
366 this->set_abiversion(0);
372 // Call Sized_dynobj::do_read_symbols to read the symbols then
373 // read .opd from a dynamic object, filling in opd_ent_ vector,
375 do_read_symbols(Read_symbols_data
*);
377 // The .opd section shndx.
381 return this->opd_shndx_
;
384 // The .opd section address.
388 return this->opd_address_
;
391 // Init OPD entry arrays.
393 init_opd(size_t opd_size
)
395 size_t count
= this->opd_ent_ndx(opd_size
);
396 this->opd_ent_
.resize(count
);
399 // Return section and offset of function entry for .opd + R_OFF.
401 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
403 size_t ndx
= this->opd_ent_ndx(r_off
);
404 gold_assert(ndx
< this->opd_ent_
.size());
405 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
407 *value
= this->opd_ent_
[ndx
].off
;
408 return this->opd_ent_
[ndx
].shndx
;
411 // Set section and offset of function entry for .opd + R_OFF.
413 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
415 size_t ndx
= this->opd_ent_ndx(r_off
);
416 gold_assert(ndx
< this->opd_ent_
.size());
417 this->opd_ent_
[ndx
].shndx
= shndx
;
418 this->opd_ent_
[ndx
].off
= value
;
423 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
425 // Set ABI version for input and output.
427 set_abiversion(int ver
);
430 // Used to specify extent of executable sections.
433 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
434 : start(start_
), len(len_
), shndx(shndx_
)
438 operator<(const Sec_info
& that
) const
439 { return this->start
< that
.start
; }
452 // Return index into opd_ent_ array for .opd entry at OFF.
454 opd_ent_ndx(size_t off
) const
457 // For 64-bit the .opd section shndx and address.
458 unsigned int opd_shndx_
;
459 Address opd_address_
;
461 // The first 8-byte word of an OPD entry gives the address of the
462 // entry point of the function. Records the section and offset
463 // corresponding to the address. Note that in dynamic objects,
464 // offset is *not* relative to the section.
465 std::vector
<Opd_ent
> opd_ent_
;
468 elfcpp::Elf_Word e_flags_
;
471 template<int size
, bool big_endian
>
472 class Target_powerpc
: public Sized_target
<size
, big_endian
>
476 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
477 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
478 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
479 static const Address invalid_address
= static_cast<Address
>(0) - 1;
480 // Offset of tp and dtp pointers from start of TLS block.
481 static const Address tp_offset
= 0x7000;
482 static const Address dtp_offset
= 0x8000;
485 : Sized_target
<size
, big_endian
>(&powerpc_info
),
486 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
487 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
488 tlsld_got_offset_(-1U),
489 stub_tables_(), branch_lookup_table_(), branch_info_(),
490 plt_thread_safe_(false)
494 // Process the relocations to determine unreferenced sections for
495 // garbage collection.
497 gc_process_relocs(Symbol_table
* symtab
,
499 Sized_relobj_file
<size
, big_endian
>* object
,
500 unsigned int data_shndx
,
501 unsigned int sh_type
,
502 const unsigned char* prelocs
,
504 Output_section
* output_section
,
505 bool needs_special_offset_handling
,
506 size_t local_symbol_count
,
507 const unsigned char* plocal_symbols
);
509 // Scan the relocations to look for symbol adjustments.
511 scan_relocs(Symbol_table
* symtab
,
513 Sized_relobj_file
<size
, big_endian
>* object
,
514 unsigned int data_shndx
,
515 unsigned int sh_type
,
516 const unsigned char* prelocs
,
518 Output_section
* output_section
,
519 bool needs_special_offset_handling
,
520 size_t local_symbol_count
,
521 const unsigned char* plocal_symbols
);
523 // Map input .toc section to output .got section.
525 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
527 if (size
== 64 && strcmp(name
, ".toc") == 0)
535 // Provide linker defined save/restore functions.
537 define_save_restore_funcs(Layout
*, Symbol_table
*);
539 // No stubs unless a final link.
542 { return !parameters
->options().relocatable(); }
545 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
548 do_plt_fde_location(const Output_data
*, unsigned char*,
549 uint64_t*, off_t
*) const;
551 // Stash info about branches, for stub generation.
553 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
554 unsigned int data_shndx
, Address r_offset
,
555 unsigned int r_type
, unsigned int r_sym
, Address addend
)
557 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
558 this->branch_info_
.push_back(info
);
559 if (r_type
== elfcpp::R_POWERPC_REL14
560 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
561 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
562 ppc_object
->set_has_14bit_branch(data_shndx
);
565 Stub_table
<size
, big_endian
>*
569 do_define_standard_symbols(Symbol_table
*, Layout
*);
571 // Finalize the sections.
573 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
575 // Return the value to use for a dynamic which requires special
578 do_dynsym_value(const Symbol
*) const;
580 // Return the PLT address to use for a local symbol.
582 do_plt_address_for_local(const Relobj
*, unsigned int) const;
584 // Return the PLT address to use for a global symbol.
586 do_plt_address_for_global(const Symbol
*) const;
588 // Return the offset to use for the GOT_INDX'th got entry which is
589 // for a local tls symbol specified by OBJECT, SYMNDX.
591 do_tls_offset_for_local(const Relobj
* object
,
593 unsigned int got_indx
) const;
595 // Return the offset to use for the GOT_INDX'th got entry which is
596 // for global tls symbol GSYM.
598 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
601 do_function_location(Symbol_location
*) const;
604 do_can_check_for_function_pointers() const
607 // Relocate a section.
609 relocate_section(const Relocate_info
<size
, big_endian
>*,
610 unsigned int sh_type
,
611 const unsigned char* prelocs
,
613 Output_section
* output_section
,
614 bool needs_special_offset_handling
,
616 Address view_address
,
617 section_size_type view_size
,
618 const Reloc_symbol_changes
*);
620 // Scan the relocs during a relocatable link.
622 scan_relocatable_relocs(Symbol_table
* symtab
,
624 Sized_relobj_file
<size
, big_endian
>* object
,
625 unsigned int data_shndx
,
626 unsigned int sh_type
,
627 const unsigned char* prelocs
,
629 Output_section
* output_section
,
630 bool needs_special_offset_handling
,
631 size_t local_symbol_count
,
632 const unsigned char* plocal_symbols
,
633 Relocatable_relocs
*);
635 // Emit relocations for a section.
637 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
638 unsigned int sh_type
,
639 const unsigned char* prelocs
,
641 Output_section
* output_section
,
642 typename
elfcpp::Elf_types
<size
>::Elf_Off
643 offset_in_output_section
,
644 const Relocatable_relocs
*,
646 Address view_address
,
648 unsigned char* reloc_view
,
649 section_size_type reloc_view_size
);
651 // Return whether SYM is defined by the ABI.
653 do_is_defined_by_abi(const Symbol
* sym
) const
655 return strcmp(sym
->name(), "__tls_get_addr") == 0;
658 // Return the size of the GOT section.
662 gold_assert(this->got_
!= NULL
);
663 return this->got_
->data_size();
666 // Get the PLT section.
667 const Output_data_plt_powerpc
<size
, big_endian
>*
670 gold_assert(this->plt_
!= NULL
);
674 // Get the IPLT section.
675 const Output_data_plt_powerpc
<size
, big_endian
>*
678 gold_assert(this->iplt_
!= NULL
);
682 // Get the .glink section.
683 const Output_data_glink
<size
, big_endian
>*
684 glink_section() const
686 gold_assert(this->glink_
!= NULL
);
690 Output_data_glink
<size
, big_endian
>*
693 gold_assert(this->glink_
!= NULL
);
697 bool has_glink() const
698 { return this->glink_
!= NULL
; }
700 // Get the GOT section.
701 const Output_data_got_powerpc
<size
, big_endian
>*
704 gold_assert(this->got_
!= NULL
);
708 // Get the GOT section, creating it if necessary.
709 Output_data_got_powerpc
<size
, big_endian
>*
710 got_section(Symbol_table
*, Layout
*);
713 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
714 const elfcpp::Ehdr
<size
, big_endian
>&);
716 // Return the number of entries in the GOT.
718 got_entry_count() const
720 if (this->got_
== NULL
)
722 return this->got_size() / (size
/ 8);
725 // Return the number of entries in the PLT.
727 plt_entry_count() const;
729 // Return the offset of the first non-reserved PLT entry.
731 first_plt_entry_offset() const
735 if (this->abiversion() >= 2)
740 // Return the size of each PLT entry.
742 plt_entry_size() const
746 if (this->abiversion() >= 2)
751 // Add any special sections for this symbol to the gc work list.
752 // For powerpc64, this adds the code section of a function
755 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
757 // Handle target specific gc actions when adding a gc reference from
758 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
759 // and DST_OFF. For powerpc64, this adds a referenc to the code
760 // section of a function descriptor.
762 do_gc_add_reference(Symbol_table
* symtab
,
764 unsigned int src_shndx
,
766 unsigned int dst_shndx
,
767 Address dst_off
) const;
769 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
772 { return this->stub_tables_
; }
774 const Output_data_brlt_powerpc
<size
, big_endian
>*
776 { return this->brlt_section_
; }
779 add_branch_lookup_table(Address to
)
781 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
782 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
786 find_branch_lookup_table(Address to
)
788 typename
Branch_lookup_table::const_iterator p
789 = this->branch_lookup_table_
.find(to
);
790 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
794 write_branch_lookup_table(unsigned char *oview
)
796 for (typename
Branch_lookup_table::const_iterator p
797 = this->branch_lookup_table_
.begin();
798 p
!= this->branch_lookup_table_
.end();
801 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
806 plt_thread_safe() const
807 { return this->plt_thread_safe_
; }
811 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
814 set_abiversion (int ver
)
816 elfcpp::Elf_Word flags
= this->processor_specific_flags();
817 flags
&= ~elfcpp::EF_PPC64_ABI
;
818 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
819 this->set_processor_specific_flags(flags
);
822 // Offset to to save stack slot
825 { return this->abiversion() < 2 ? 40 : 24; }
841 : tls_get_addr_(NOT_EXPECTED
),
842 relinfo_(NULL
), relnum_(0), r_offset_(0)
847 if (this->tls_get_addr_
!= NOT_EXPECTED
)
854 if (this->relinfo_
!= NULL
)
855 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
856 _("missing expected __tls_get_addr call"));
860 expect_tls_get_addr_call(
861 const Relocate_info
<size
, big_endian
>* relinfo
,
865 this->tls_get_addr_
= EXPECTED
;
866 this->relinfo_
= relinfo
;
867 this->relnum_
= relnum
;
868 this->r_offset_
= r_offset
;
872 expect_tls_get_addr_call()
873 { this->tls_get_addr_
= EXPECTED
; }
876 skip_next_tls_get_addr_call()
877 {this->tls_get_addr_
= SKIP
; }
880 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
882 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
883 || r_type
== elfcpp::R_PPC_PLTREL24
)
885 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
886 Tls_get_addr last_tls
= this->tls_get_addr_
;
887 this->tls_get_addr_
= NOT_EXPECTED
;
888 if (is_tls_call
&& last_tls
!= EXPECTED
)
890 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
899 // What we're up to regarding calls to __tls_get_addr.
900 // On powerpc, the branch and link insn making a call to
901 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
902 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
903 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
904 // The marker relocation always comes first, and has the same
905 // symbol as the reloc on the insn setting up the __tls_get_addr
906 // argument. This ties the arg setup insn with the call insn,
907 // allowing ld to safely optimize away the call. We check that
908 // every call to __tls_get_addr has a marker relocation, and that
909 // every marker relocation is on a call to __tls_get_addr.
910 Tls_get_addr tls_get_addr_
;
911 // Info about the last reloc for error message.
912 const Relocate_info
<size
, big_endian
>* relinfo_
;
917 // The class which scans relocations.
918 class Scan
: protected Track_tls
921 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
924 : Track_tls(), issued_non_pic_error_(false)
928 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
931 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
932 Sized_relobj_file
<size
, big_endian
>* object
,
933 unsigned int data_shndx
,
934 Output_section
* output_section
,
935 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
936 const elfcpp::Sym
<size
, big_endian
>& lsym
,
940 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
941 Sized_relobj_file
<size
, big_endian
>* object
,
942 unsigned int data_shndx
,
943 Output_section
* output_section
,
944 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
948 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
950 Sized_relobj_file
<size
, big_endian
>* ,
953 const elfcpp::Rela
<size
, big_endian
>& ,
955 const elfcpp::Sym
<size
, big_endian
>&)
957 // PowerPC64 .opd is not folded, so any identical function text
958 // may be folded and we'll still keep function addresses distinct.
959 // That means no reloc is of concern here.
962 // For 32-bit, conservatively assume anything but calls to
963 // function code might be taking the address of the function.
964 return !is_branch_reloc(r_type
);
968 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
970 Sized_relobj_file
<size
, big_endian
>* ,
973 const elfcpp::Rela
<size
, big_endian
>& ,
980 return !is_branch_reloc(r_type
);
984 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
985 Sized_relobj_file
<size
, big_endian
>* object
,
986 unsigned int r_type
, bool report_err
);
990 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
991 unsigned int r_type
);
994 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
995 unsigned int r_type
, Symbol
*);
998 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
999 Target_powerpc
* target
);
1002 check_non_pic(Relobj
*, unsigned int r_type
);
1004 // Whether we have issued an error about a non-PIC compilation.
1005 bool issued_non_pic_error_
;
1009 symval_for_branch(const Symbol_table
* symtab
, Address value
,
1010 const Sized_symbol
<size
>* gsym
,
1011 Powerpc_relobj
<size
, big_endian
>* object
,
1012 unsigned int *dest_shndx
);
1014 // The class which implements relocation.
1015 class Relocate
: protected Track_tls
1018 // Use 'at' branch hints when true, 'y' when false.
1019 // FIXME maybe: set this with an option.
1020 static const bool is_isa_v2
= true;
1026 // Do a relocation. Return false if the caller should not issue
1027 // any warnings about this relocation.
1029 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
1030 Output_section
*, size_t relnum
,
1031 const elfcpp::Rela
<size
, big_endian
>&,
1032 unsigned int r_type
, const Sized_symbol
<size
>*,
1033 const Symbol_value
<size
>*,
1035 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1039 class Relocate_comdat_behavior
1042 // Decide what the linker should do for relocations that refer to
1043 // discarded comdat sections.
1044 inline Comdat_behavior
1045 get(const char* name
)
1047 gold::Default_comdat_behavior default_behavior
;
1048 Comdat_behavior ret
= default_behavior
.get(name
);
1049 if (ret
== CB_WARNING
)
1052 && (strcmp(name
, ".fixup") == 0
1053 || strcmp(name
, ".got2") == 0))
1056 && (strcmp(name
, ".opd") == 0
1057 || strcmp(name
, ".toc") == 0
1058 || strcmp(name
, ".toc1") == 0))
1065 // A class which returns the size required for a relocation type,
1066 // used while scanning relocs during a relocatable link.
1067 class Relocatable_size_for_reloc
1071 get_size_for_reloc(unsigned int, Relobj
*)
1078 // Optimize the TLS relocation type based on what we know about the
1079 // symbol. IS_FINAL is true if the final address of this symbol is
1080 // known at link time.
1082 tls::Tls_optimization
1083 optimize_tls_gd(bool is_final
)
1085 // If we are generating a shared library, then we can't do anything
1087 if (parameters
->options().shared())
1088 return tls::TLSOPT_NONE
;
1091 return tls::TLSOPT_TO_IE
;
1092 return tls::TLSOPT_TO_LE
;
1095 tls::Tls_optimization
1098 if (parameters
->options().shared())
1099 return tls::TLSOPT_NONE
;
1101 return tls::TLSOPT_TO_LE
;
1104 tls::Tls_optimization
1105 optimize_tls_ie(bool is_final
)
1107 if (!is_final
|| parameters
->options().shared())
1108 return tls::TLSOPT_NONE
;
1110 return tls::TLSOPT_TO_LE
;
1115 make_glink_section(Layout
*);
1117 // Create the PLT section.
1119 make_plt_section(Symbol_table
*, Layout
*);
1122 make_iplt_section(Symbol_table
*, Layout
*);
1125 make_brlt_section(Layout
*);
1127 // Create a PLT entry for a global symbol.
1129 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1131 // Create a PLT entry for a local IFUNC symbol.
1133 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1134 Sized_relobj_file
<size
, big_endian
>*,
1138 // Create a GOT entry for local dynamic __tls_get_addr.
1140 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1141 Sized_relobj_file
<size
, big_endian
>* object
);
1144 tlsld_got_offset() const
1146 return this->tlsld_got_offset_
;
1149 // Get the dynamic reloc section, creating it if necessary.
1151 rela_dyn_section(Layout
*);
1153 // Similarly, but for ifunc symbols get the one for ifunc.
1155 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1157 // Copy a relocation against a global symbol.
1159 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1160 Sized_relobj_file
<size
, big_endian
>* object
,
1161 unsigned int shndx
, Output_section
* output_section
,
1162 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1164 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1165 symtab
->get_sized_symbol
<size
>(sym
),
1166 object
, shndx
, output_section
,
1167 reloc
, this->rela_dyn_section(layout
));
1170 // Look over all the input sections, deciding where to place stubs.
1172 group_sections(Layout
*, const Task
*);
1174 // Sort output sections by address.
1175 struct Sort_sections
1178 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1179 { return sec1
->address() < sec2
->address(); }
1185 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1186 unsigned int data_shndx
,
1188 unsigned int r_type
,
1191 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1192 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1198 // If this branch needs a plt call stub, or a long branch stub, make one.
1200 make_stub(Stub_table
<size
, big_endian
>*,
1201 Stub_table
<size
, big_endian
>*,
1202 Symbol_table
*) const;
1205 // The branch location..
1206 Powerpc_relobj
<size
, big_endian
>* object_
;
1207 unsigned int shndx_
;
1209 // ..and the branch type and destination.
1210 unsigned int r_type_
;
1211 unsigned int r_sym_
;
1215 // Information about this specific target which we pass to the
1216 // general Target structure.
1217 static Target::Target_info powerpc_info
;
1219 // The types of GOT entries needed for this platform.
1220 // These values are exposed to the ABI in an incremental link.
1221 // Do not renumber existing values without changing the version
1222 // number of the .gnu_incremental_inputs section.
1226 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1227 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1228 GOT_TYPE_TPREL
// entry for @got@tprel
1232 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1233 // The PLT section. This is a container for a table of addresses,
1234 // and their relocations. Each address in the PLT has a dynamic
1235 // relocation (R_*_JMP_SLOT) and each address will have a
1236 // corresponding entry in .glink for lazy resolution of the PLT.
1237 // ppc32 initialises the PLT to point at the .glink entry, while
1238 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1239 // linker adds a stub that loads the PLT entry into ctr then
1240 // branches to ctr. There may be more than one stub for each PLT
1241 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1242 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1243 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1244 // The IPLT section. Like plt_, this is a container for a table of
1245 // addresses and their relocations, specifically for STT_GNU_IFUNC
1246 // functions that resolve locally (STT_GNU_IFUNC functions that
1247 // don't resolve locally go in PLT). Unlike plt_, these have no
1248 // entry in .glink for lazy resolution, and the relocation section
1249 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1250 // the relocation section may contain relocations against
1251 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1252 // relocation section will appear at the end of other dynamic
1253 // relocations, so that ld.so applies these relocations after other
1254 // dynamic relocations. In a static executable, the relocation
1255 // section is emitted and marked with __rela_iplt_start and
1256 // __rela_iplt_end symbols.
1257 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1258 // Section holding long branch destinations.
1259 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1260 // The .glink section.
1261 Output_data_glink
<size
, big_endian
>* glink_
;
1262 // The dynamic reloc section.
1263 Reloc_section
* rela_dyn_
;
1264 // Relocs saved to avoid a COPY reloc.
1265 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1266 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1267 unsigned int tlsld_got_offset_
;
1269 Stub_tables stub_tables_
;
1270 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1271 Branch_lookup_table branch_lookup_table_
;
1273 typedef std::vector
<Branch_info
> Branches
;
1274 Branches branch_info_
;
1276 bool plt_thread_safe_
;
1280 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1283 true, // is_big_endian
1284 elfcpp::EM_PPC
, // machine_code
1285 false, // has_make_symbol
1286 false, // has_resolve
1287 false, // has_code_fill
1288 true, // is_default_stack_executable
1289 false, // can_icf_inline_merge_sections
1291 "/usr/lib/ld.so.1", // dynamic_linker
1292 0x10000000, // default_text_segment_address
1293 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1294 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1295 false, // isolate_execinstr
1297 elfcpp::SHN_UNDEF
, // small_common_shndx
1298 elfcpp::SHN_UNDEF
, // large_common_shndx
1299 0, // small_common_section_flags
1300 0, // large_common_section_flags
1301 NULL
, // attributes_section
1302 NULL
, // attributes_vendor
1303 "_start" // entry_symbol_name
1307 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1310 false, // is_big_endian
1311 elfcpp::EM_PPC
, // machine_code
1312 false, // has_make_symbol
1313 false, // has_resolve
1314 false, // has_code_fill
1315 true, // is_default_stack_executable
1316 false, // can_icf_inline_merge_sections
1318 "/usr/lib/ld.so.1", // dynamic_linker
1319 0x10000000, // default_text_segment_address
1320 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1321 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1322 false, // isolate_execinstr
1324 elfcpp::SHN_UNDEF
, // small_common_shndx
1325 elfcpp::SHN_UNDEF
, // large_common_shndx
1326 0, // small_common_section_flags
1327 0, // large_common_section_flags
1328 NULL
, // attributes_section
1329 NULL
, // attributes_vendor
1330 "_start" // entry_symbol_name
1334 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1337 true, // is_big_endian
1338 elfcpp::EM_PPC64
, // 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
1361 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1364 false, // is_big_endian
1365 elfcpp::EM_PPC64
, // machine_code
1366 false, // has_make_symbol
1367 false, // has_resolve
1368 false, // has_code_fill
1369 true, // is_default_stack_executable
1370 false, // can_icf_inline_merge_sections
1372 "/usr/lib/ld.so.1", // dynamic_linker
1373 0x10000000, // default_text_segment_address
1374 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1375 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1376 false, // isolate_execinstr
1378 elfcpp::SHN_UNDEF
, // small_common_shndx
1379 elfcpp::SHN_UNDEF
, // large_common_shndx
1380 0, // small_common_section_flags
1381 0, // large_common_section_flags
1382 NULL
, // attributes_section
1383 NULL
, // attributes_vendor
1384 "_start" // entry_symbol_name
1388 is_branch_reloc(unsigned int r_type
)
1390 return (r_type
== elfcpp::R_POWERPC_REL24
1391 || r_type
== elfcpp::R_PPC_PLTREL24
1392 || r_type
== elfcpp::R_PPC_LOCAL24PC
1393 || r_type
== elfcpp::R_POWERPC_REL14
1394 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1395 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1396 || r_type
== elfcpp::R_POWERPC_ADDR24
1397 || r_type
== elfcpp::R_POWERPC_ADDR14
1398 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1399 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1402 // If INSN is an opcode that may be used with an @tls operand, return
1403 // the transformed insn for TLS optimisation, otherwise return 0. If
1404 // REG is non-zero only match an insn with RB or RA equal to REG.
1406 at_tls_transform(uint32_t insn
, unsigned int reg
)
1408 if ((insn
& (0x3f << 26)) != 31 << 26)
1412 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1413 rtra
= insn
& ((1 << 26) - (1 << 16));
1414 else if (((insn
>> 16) & 0x1f) == reg
)
1415 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1419 if ((insn
& (0x3ff << 1)) == 266 << 1)
1422 else if ((insn
& (0x1f << 1)) == 23 << 1
1423 && ((insn
& (0x1f << 6)) < 14 << 6
1424 || ((insn
& (0x1f << 6)) >= 16 << 6
1425 && (insn
& (0x1f << 6)) < 24 << 6)))
1426 // load and store indexed -> dform
1427 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1428 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1429 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1430 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1431 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1433 insn
= (58 << 26) | 2;
1441 template<int size
, bool big_endian
>
1442 class Powerpc_relocate_functions
1459 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1460 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1462 template<int valsize
>
1464 has_overflow_signed(Address value
)
1466 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1467 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1468 limit
<<= ((valsize
- 1) >> 1);
1469 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1470 return value
+ limit
> (limit
<< 1) - 1;
1473 template<int valsize
>
1475 has_overflow_bitfield(Address value
)
1477 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1478 limit
<<= ((valsize
- 1) >> 1);
1479 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1480 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1483 template<int valsize
>
1484 static inline Status
1485 overflowed(Address value
, Overflow_check overflow
)
1487 if (overflow
== CHECK_SIGNED
)
1489 if (has_overflow_signed
<valsize
>(value
))
1490 return STATUS_OVERFLOW
;
1492 else if (overflow
== CHECK_BITFIELD
)
1494 if (has_overflow_bitfield
<valsize
>(value
))
1495 return STATUS_OVERFLOW
;
1500 // Do a simple RELA relocation
1501 template<int valsize
>
1502 static inline Status
1503 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1505 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1506 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1507 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1508 return overflowed
<valsize
>(value
, overflow
);
1511 template<int valsize
>
1512 static inline Status
1513 rela(unsigned char* view
,
1514 unsigned int right_shift
,
1515 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1517 Overflow_check overflow
)
1519 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1520 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1521 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1522 Valtype reloc
= value
>> right_shift
;
1525 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1526 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1529 // Do a simple RELA relocation, unaligned.
1530 template<int valsize
>
1531 static inline Status
1532 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1534 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1535 return overflowed
<valsize
>(value
, overflow
);
1538 template<int valsize
>
1539 static inline Status
1540 rela_ua(unsigned char* view
,
1541 unsigned int right_shift
,
1542 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1544 Overflow_check overflow
)
1546 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1548 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1549 Valtype reloc
= value
>> right_shift
;
1552 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1553 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1557 // R_PPC64_ADDR64: (Symbol + Addend)
1559 addr64(unsigned char* view
, Address value
)
1560 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1562 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1564 addr64_u(unsigned char* view
, Address value
)
1565 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1567 // R_POWERPC_ADDR32: (Symbol + Addend)
1568 static inline Status
1569 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1570 { return This::template rela
<32>(view
, value
, overflow
); }
1572 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1573 static inline Status
1574 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1575 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1577 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1578 static inline Status
1579 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1581 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1582 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1583 stat
= STATUS_OVERFLOW
;
1587 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1588 static inline Status
1589 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1590 { return This::template rela
<16>(view
, value
, overflow
); }
1592 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1593 static inline Status
1594 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1595 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1597 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1598 static inline Status
1599 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1601 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1602 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1603 stat
= STATUS_OVERFLOW
;
1607 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1609 addr16_hi(unsigned char* view
, Address value
)
1610 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1612 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1614 addr16_ha(unsigned char* view
, Address value
)
1615 { This::addr16_hi(view
, value
+ 0x8000); }
1617 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1619 addr16_hi2(unsigned char* view
, Address value
)
1620 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1622 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1624 addr16_ha2(unsigned char* view
, Address value
)
1625 { This::addr16_hi2(view
, value
+ 0x8000); }
1627 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1629 addr16_hi3(unsigned char* view
, Address value
)
1630 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1632 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1634 addr16_ha3(unsigned char* view
, Address value
)
1635 { This::addr16_hi3(view
, value
+ 0x8000); }
1637 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1638 static inline Status
1639 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1641 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1642 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1643 stat
= STATUS_OVERFLOW
;
1648 // Set ABI version for input and output.
1650 template<int size
, bool big_endian
>
1652 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1654 this->e_flags_
|= ver
;
1655 if (this->abiversion() != 0)
1657 Target_powerpc
<size
, big_endian
>* target
=
1658 static_cast<Target_powerpc
<size
, big_endian
>*>(
1659 parameters
->sized_target
<size
, big_endian
>());
1660 if (target
->abiversion() == 0)
1661 target
->set_abiversion(this->abiversion());
1662 else if (target
->abiversion() != this->abiversion())
1663 gold_error(_("%s: ABI version %d is not compatible "
1664 "with ABI version %d output"),
1665 this->name().c_str(),
1666 this->abiversion(), target
->abiversion());
1671 // Stash away the index of .got2 or .opd in a relocatable object, if
1672 // such a section exists.
1674 template<int size
, bool big_endian
>
1676 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1677 Read_symbols_data
* sd
)
1679 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1680 const unsigned char* namesu
= sd
->section_names
->data();
1681 const char* names
= reinterpret_cast<const char*>(namesu
);
1682 section_size_type names_size
= sd
->section_names_size
;
1683 const unsigned char* s
;
1685 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1686 size
== 32 ? ".got2" : ".opd",
1687 names
, names_size
, NULL
);
1690 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1691 this->special_
= ndx
;
1694 if (this->abiversion() == 0)
1695 this->set_abiversion(1);
1696 else if (this->abiversion() > 1)
1697 gold_error(_("%s: .opd invalid in abiv%d"),
1698 this->name().c_str(), this->abiversion());
1701 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1704 // Examine .rela.opd to build info about function entry points.
1706 template<int size
, bool big_endian
>
1708 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1710 const unsigned char* prelocs
,
1711 const unsigned char* plocal_syms
)
1715 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1717 const int reloc_size
1718 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1719 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1720 Address expected_off
= 0;
1721 bool regular
= true;
1722 unsigned int opd_ent_size
= 0;
1724 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1726 Reltype
reloc(prelocs
);
1727 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1728 = reloc
.get_r_info();
1729 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1730 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1732 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1733 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1736 if (r_sym
< this->local_symbol_count())
1738 typename
elfcpp::Sym
<size
, big_endian
>
1739 lsym(plocal_syms
+ r_sym
* sym_size
);
1740 shndx
= lsym
.get_st_shndx();
1741 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1742 value
= lsym
.get_st_value();
1745 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1747 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1748 value
+ reloc
.get_r_addend());
1751 expected_off
= reloc
.get_r_offset();
1752 opd_ent_size
= expected_off
;
1754 else if (expected_off
!= reloc
.get_r_offset())
1756 expected_off
+= opd_ent_size
;
1758 else if (r_type
== elfcpp::R_PPC64_TOC
)
1760 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1765 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1766 this->name().c_str(), r_type
);
1770 if (reloc_count
<= 2)
1771 opd_ent_size
= this->section_size(this->opd_shndx());
1772 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1776 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1777 this->name().c_str());
1783 template<int size
, bool big_endian
>
1785 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1787 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1790 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1791 p
!= rd
->relocs
.end();
1794 if (p
->data_shndx
== this->opd_shndx())
1796 uint64_t opd_size
= this->section_size(this->opd_shndx());
1797 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1800 this->init_opd(opd_size
);
1801 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1802 rd
->local_symbols
->data());
1810 // Read the symbols then set up st_other vector.
1812 template<int size
, bool big_endian
>
1814 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1816 Sized_relobj_file
<size
, big_endian
>::do_read_symbols(sd
);
1819 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1820 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1821 const unsigned int loccount
= this->do_local_symbol_count();
1824 this->st_other_
.resize(loccount
);
1825 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1826 off_t locsize
= loccount
* sym_size
;
1827 const unsigned int symtab_shndx
= this->symtab_shndx();
1828 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1829 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1830 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1831 locsize
, true, false);
1833 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1835 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1836 unsigned char st_other
= sym
.get_st_other();
1837 this->st_other_
[i
] = st_other
;
1838 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1840 if (this->abiversion() == 0)
1841 this->set_abiversion(2);
1842 else if (this->abiversion() < 2)
1843 gold_error(_("%s: local symbol %d has invalid st_other"
1844 " for ABI version 1"),
1845 this->name().c_str(), i
);
1852 template<int size
, bool big_endian
>
1854 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1856 this->e_flags_
|= ver
;
1857 if (this->abiversion() != 0)
1859 Target_powerpc
<size
, big_endian
>* target
=
1860 static_cast<Target_powerpc
<size
, big_endian
>*>(
1861 parameters
->sized_target
<size
, big_endian
>());
1862 if (target
->abiversion() == 0)
1863 target
->set_abiversion(this->abiversion());
1864 else if (target
->abiversion() != this->abiversion())
1865 gold_error(_("%s: ABI version %d is not compatible "
1866 "with ABI version %d output"),
1867 this->name().c_str(),
1868 this->abiversion(), target
->abiversion());
1873 // Call Sized_dynobj::do_read_symbols to read the symbols then
1874 // read .opd from a dynamic object, filling in opd_ent_ vector,
1876 template<int size
, bool big_endian
>
1878 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1880 Sized_dynobj
<size
, big_endian
>::do_read_symbols(sd
);
1883 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1884 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1885 const unsigned char* namesu
= sd
->section_names
->data();
1886 const char* names
= reinterpret_cast<const char*>(namesu
);
1887 const unsigned char* s
= NULL
;
1888 const unsigned char* opd
;
1889 section_size_type opd_size
;
1891 // Find and read .opd section.
1894 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1895 sd
->section_names_size
,
1900 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1901 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1902 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1904 if (this->abiversion() == 0)
1905 this->set_abiversion(1);
1906 else if (this->abiversion() > 1)
1907 gold_error(_("%s: .opd invalid in abiv%d"),
1908 this->name().c_str(), this->abiversion());
1910 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1911 this->opd_address_
= shdr
.get_sh_addr();
1912 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1913 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1919 // Build set of executable sections.
1920 // Using a set is probably overkill. There is likely to be only
1921 // a few executable sections, typically .init, .text and .fini,
1922 // and they are generally grouped together.
1923 typedef std::set
<Sec_info
> Exec_sections
;
1924 Exec_sections exec_sections
;
1926 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
1928 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1929 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1930 && ((shdr
.get_sh_flags()
1931 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1932 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1933 && shdr
.get_sh_size() != 0)
1935 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
1936 shdr
.get_sh_size(), i
));
1939 if (exec_sections
.empty())
1942 // Look over the OPD entries. This is complicated by the fact
1943 // that some binaries will use two-word entries while others
1944 // will use the standard three-word entries. In most cases
1945 // the third word (the environment pointer for languages like
1946 // Pascal) is unused and will be zero. If the third word is
1947 // used it should not be pointing into executable sections,
1949 this->init_opd(opd_size
);
1950 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
1952 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
1953 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
1954 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
1956 // Chances are that this is the third word of an OPD entry.
1958 typename
Exec_sections::const_iterator e
1959 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
1960 if (e
!= exec_sections
.begin())
1963 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
1965 // We have an address in an executable section.
1966 // VAL ought to be the function entry, set it up.
1967 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
1968 // Skip second word of OPD entry, the TOC pointer.
1972 // If we didn't match any executable sections, we likely
1973 // have a non-zero third word in the OPD entry.
1978 // Set up some symbols.
1980 template<int size
, bool big_endian
>
1982 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1983 Symbol_table
* symtab
,
1988 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1989 // undefined when scanning relocs (and thus requires
1990 // non-relative dynamic relocs). The proper value will be
1992 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1993 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1995 Target_powerpc
<size
, big_endian
>* target
=
1996 static_cast<Target_powerpc
<size
, big_endian
>*>(
1997 parameters
->sized_target
<size
, big_endian
>());
1998 Output_data_got_powerpc
<size
, big_endian
>* got
1999 = target
->got_section(symtab
, layout
);
2000 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2001 Symbol_table::PREDEFINED
,
2005 elfcpp::STV_HIDDEN
, 0,
2009 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2010 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2011 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2013 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2015 = layout
->add_output_section_data(".sdata", 0,
2017 | elfcpp::SHF_WRITE
,
2018 sdata
, ORDER_SMALL_DATA
, false);
2019 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2020 Symbol_table::PREDEFINED
,
2021 os
, 32768, 0, elfcpp::STT_OBJECT
,
2022 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2028 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2029 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2030 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2032 Target_powerpc
<size
, big_endian
>* target
=
2033 static_cast<Target_powerpc
<size
, big_endian
>*>(
2034 parameters
->sized_target
<size
, big_endian
>());
2035 Output_data_got_powerpc
<size
, big_endian
>* got
2036 = target
->got_section(symtab
, layout
);
2037 symtab
->define_in_output_data(".TOC.", NULL
,
2038 Symbol_table::PREDEFINED
,
2042 elfcpp::STV_HIDDEN
, 0,
2048 // Set up PowerPC target specific relobj.
2050 template<int size
, bool big_endian
>
2052 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2053 const std::string
& name
,
2054 Input_file
* input_file
,
2055 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2057 int et
= ehdr
.get_e_type();
2058 // ET_EXEC files are valid input for --just-symbols/-R,
2059 // and we treat them as relocatable objects.
2060 if (et
== elfcpp::ET_REL
2061 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2063 Powerpc_relobj
<size
, big_endian
>* obj
=
2064 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2068 else if (et
== elfcpp::ET_DYN
)
2070 Powerpc_dynobj
<size
, big_endian
>* obj
=
2071 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2077 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2082 template<int size
, bool big_endian
>
2083 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2086 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2087 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2089 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2090 : Output_data_got
<size
, big_endian
>(),
2091 symtab_(symtab
), layout_(layout
),
2092 header_ent_cnt_(size
== 32 ? 3 : 1),
2093 header_index_(size
== 32 ? 0x2000 : 0)
2096 // Override all the Output_data_got methods we use so as to first call
2099 add_global(Symbol
* gsym
, unsigned int got_type
)
2101 this->reserve_ent();
2102 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2106 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2108 this->reserve_ent();
2109 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2113 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2114 { return this->add_global_plt(gsym
, got_type
); }
2117 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2118 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2120 this->reserve_ent();
2121 Output_data_got
<size
, big_endian
>::
2122 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2126 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2127 Output_data_reloc_generic
* rel_dyn
,
2128 unsigned int r_type_1
, unsigned int r_type_2
)
2130 this->reserve_ent(2);
2131 Output_data_got
<size
, big_endian
>::
2132 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2136 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2138 this->reserve_ent();
2139 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2144 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2146 this->reserve_ent();
2147 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2152 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2153 { return this->add_local_plt(object
, sym_index
, got_type
); }
2156 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2157 unsigned int got_type
,
2158 Output_data_reloc_generic
* rel_dyn
,
2159 unsigned int r_type
)
2161 this->reserve_ent(2);
2162 Output_data_got
<size
, big_endian
>::
2163 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2167 add_constant(Valtype constant
)
2169 this->reserve_ent();
2170 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2174 add_constant_pair(Valtype c1
, Valtype c2
)
2176 this->reserve_ent(2);
2177 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2180 // Offset of _GLOBAL_OFFSET_TABLE_.
2184 return this->got_offset(this->header_index_
);
2187 // Offset of base used to access the GOT/TOC.
2188 // The got/toc pointer reg will be set to this value.
2190 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2193 return this->g_o_t();
2195 return (this->output_section()->address()
2196 + object
->toc_base_offset()
2200 // Ensure our GOT has a header.
2202 set_final_data_size()
2204 if (this->header_ent_cnt_
!= 0)
2205 this->make_header();
2206 Output_data_got
<size
, big_endian
>::set_final_data_size();
2209 // First word of GOT header needs some values that are not
2210 // handled by Output_data_got so poke them in here.
2211 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2213 do_write(Output_file
* of
)
2216 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2217 val
= this->layout_
->dynamic_section()->address();
2219 val
= this->output_section()->address() + 0x8000;
2220 this->replace_constant(this->header_index_
, val
);
2221 Output_data_got
<size
, big_endian
>::do_write(of
);
2226 reserve_ent(unsigned int cnt
= 1)
2228 if (this->header_ent_cnt_
== 0)
2230 if (this->num_entries() + cnt
> this->header_index_
)
2231 this->make_header();
2237 this->header_ent_cnt_
= 0;
2238 this->header_index_
= this->num_entries();
2241 Output_data_got
<size
, big_endian
>::add_constant(0);
2242 Output_data_got
<size
, big_endian
>::add_constant(0);
2243 Output_data_got
<size
, big_endian
>::add_constant(0);
2245 // Define _GLOBAL_OFFSET_TABLE_ at the header
2246 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2249 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2250 sym
->set_value(this->g_o_t());
2253 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2254 Symbol_table::PREDEFINED
,
2255 this, this->g_o_t(), 0,
2258 elfcpp::STV_HIDDEN
, 0,
2262 Output_data_got
<size
, big_endian
>::add_constant(0);
2265 // Stashed pointers.
2266 Symbol_table
* symtab_
;
2270 unsigned int header_ent_cnt_
;
2271 // GOT header index.
2272 unsigned int header_index_
;
2275 // Get the GOT section, creating it if necessary.
2277 template<int size
, bool big_endian
>
2278 Output_data_got_powerpc
<size
, big_endian
>*
2279 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2282 if (this->got_
== NULL
)
2284 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2287 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2289 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2290 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2291 this->got_
, ORDER_DATA
, false);
2297 // Get the dynamic reloc section, creating it if necessary.
2299 template<int size
, bool big_endian
>
2300 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2301 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2303 if (this->rela_dyn_
== NULL
)
2305 gold_assert(layout
!= NULL
);
2306 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2307 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2308 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2309 ORDER_DYNAMIC_RELOCS
, false);
2311 return this->rela_dyn_
;
2314 // Similarly, but for ifunc symbols get the one for ifunc.
2316 template<int size
, bool big_endian
>
2317 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2318 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2323 return this->rela_dyn_section(layout
);
2325 if (this->iplt_
== NULL
)
2326 this->make_iplt_section(symtab
, layout
);
2327 return this->iplt_
->rel_plt();
2333 // Determine the stub group size. The group size is the absolute
2334 // value of the parameter --stub-group-size. If --stub-group-size
2335 // is passed a negative value, we restrict stubs to be always before
2336 // the stubbed branches.
2337 Stub_control(int32_t size
)
2338 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2339 stub14_group_size_(abs(size
)),
2340 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
2341 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2343 if (stub_group_size_
== 1)
2346 if (stubs_always_before_branch_
)
2348 stub_group_size_
= 0x1e00000;
2349 stub14_group_size_
= 0x7800;
2353 stub_group_size_
= 0x1c00000;
2354 stub14_group_size_
= 0x7000;
2356 suppress_size_errors_
= true;
2360 // Return true iff input section can be handled by current stub
2363 can_add_to_stub_group(Output_section
* o
,
2364 const Output_section::Input_section
* i
,
2367 const Output_section::Input_section
*
2373 { return output_section_
; }
2379 FINDING_STUB_SECTION
,
2384 uint32_t stub_group_size_
;
2385 uint32_t stub14_group_size_
;
2386 bool stubs_always_before_branch_
;
2387 bool suppress_size_errors_
;
2388 uint64_t group_end_addr_
;
2389 const Output_section::Input_section
* owner_
;
2390 Output_section
* output_section_
;
2393 // Return true iff input section can be handled by current stub
2397 Stub_control::can_add_to_stub_group(Output_section
* o
,
2398 const Output_section::Input_section
* i
,
2402 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2403 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2405 uint64_t start_addr
= o
->address();
2408 // .init and .fini sections are pasted together to form a single
2409 // function. We can't be adding stubs in the middle of the function.
2410 this_size
= o
->data_size();
2413 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2414 this_size
= i
->data_size();
2416 uint64_t end_addr
= start_addr
+ this_size
;
2417 bool toobig
= this_size
> group_size
;
2419 if (toobig
&& !this->suppress_size_errors_
)
2420 gold_warning(_("%s:%s exceeds group size"),
2421 i
->relobj()->name().c_str(),
2422 i
->relobj()->section_name(i
->shndx()).c_str());
2424 if (this->state_
!= HAS_STUB_SECTION
2425 && (!whole_sec
|| this->output_section_
!= o
)
2426 && (this->state_
== NO_GROUP
2427 || this->group_end_addr_
- end_addr
< group_size
))
2430 this->output_section_
= o
;
2433 if (this->state_
== NO_GROUP
)
2435 this->state_
= FINDING_STUB_SECTION
;
2436 this->group_end_addr_
= end_addr
;
2438 else if (this->group_end_addr_
- start_addr
< group_size
)
2440 // Adding this section would make the group larger than GROUP_SIZE.
2441 else if (this->state_
== FINDING_STUB_SECTION
2442 && !this->stubs_always_before_branch_
2445 // But wait, there's more! Input sections up to GROUP_SIZE
2446 // bytes before the stub table can be handled by it too.
2447 this->state_
= HAS_STUB_SECTION
;
2448 this->group_end_addr_
= end_addr
;
2452 this->state_
= NO_GROUP
;
2458 // Look over all the input sections, deciding where to place stubs.
2460 template<int size
, bool big_endian
>
2462 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2465 Stub_control
stub_control(parameters
->options().stub_group_size());
2467 // Group input sections and insert stub table
2468 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
2469 Layout::Section_list section_list
;
2470 layout
->get_executable_sections(§ion_list
);
2471 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2472 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2473 o
!= section_list
.rend();
2476 typedef Output_section::Input_section_list Input_section_list
;
2477 for (Input_section_list::const_reverse_iterator i
2478 = (*o
)->input_sections().rbegin();
2479 i
!= (*o
)->input_sections().rend();
2482 if (i
->is_input_section())
2484 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2485 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2486 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2487 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2489 stub_table
->init(stub_control
.owner(),
2490 stub_control
.output_section());
2493 if (stub_table
== NULL
)
2494 stub_table
= this->new_stub_table();
2495 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
2499 if (stub_table
!= NULL
)
2501 const Output_section::Input_section
* i
= stub_control
.owner();
2502 if (!i
->is_input_section())
2504 // Corner case. A new stub group was made for the first
2505 // section (last one looked at here) for some reason, but
2506 // the first section is already being used as the owner for
2507 // a stub table for following sections. Force it into that
2509 gold_assert(this->stub_tables_
.size() >= 2);
2510 this->stub_tables_
.pop_back();
2512 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2513 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2514 ppcobj
->set_stub_table(i
->shndx(), this->stub_tables_
.back());
2517 stub_table
->init(i
, stub_control
.output_section());
2521 // If this branch needs a plt call stub, or a long branch stub, make one.
2523 template<int size
, bool big_endian
>
2525 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2526 Stub_table
<size
, big_endian
>* stub_table
,
2527 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2528 Symbol_table
* symtab
) const
2530 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2531 if (sym
!= NULL
&& sym
->is_forwarder())
2532 sym
= symtab
->resolve_forwards(sym
);
2533 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2534 Target_powerpc
<size
, big_endian
>* target
=
2535 static_cast<Target_powerpc
<size
, big_endian
>*>(
2536 parameters
->sized_target
<size
, big_endian
>());
2538 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2539 : this->object_
->local_has_plt_offset(this->r_sym_
))
2543 && target
->abiversion() >= 2
2544 && !parameters
->options().output_is_position_independent()
2545 && !is_branch_reloc(this->r_type_
))
2546 target
->glink_section()->add_global_entry(gsym
);
2549 if (stub_table
== NULL
)
2550 stub_table
= this->object_
->stub_table(this->shndx_
);
2551 if (stub_table
== NULL
)
2553 // This is a ref from a data section to an ifunc symbol.
2554 stub_table
= ifunc_stub_table
;
2556 gold_assert(stub_table
!= NULL
);
2558 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2559 this->r_type_
, this->addend_
);
2561 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2562 this->r_type_
, this->addend_
);
2567 unsigned long max_branch_offset
;
2568 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2569 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2570 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2571 max_branch_offset
= 1 << 15;
2572 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2573 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2574 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2575 max_branch_offset
= 1 << 25;
2578 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2579 gold_assert(from
!= invalid_address
);
2580 from
+= (this->object_
->output_section(this->shndx_
)->address()
2585 switch (gsym
->source())
2587 case Symbol::FROM_OBJECT
:
2589 Object
* symobj
= gsym
->object();
2590 if (symobj
->is_dynamic()
2591 || symobj
->pluginobj() != NULL
)
2594 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2595 if (shndx
== elfcpp::SHN_UNDEF
)
2600 case Symbol::IS_UNDEFINED
:
2606 Symbol_table::Compute_final_value_status status
;
2607 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2608 if (status
!= Symbol_table::CFVS_OK
)
2611 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2615 const Symbol_value
<size
>* psymval
2616 = this->object_
->local_symbol(this->r_sym_
);
2617 Symbol_value
<size
> symval
;
2618 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2619 typename
ObjType::Compute_final_local_value_status status
2620 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2622 if (status
!= ObjType::CFLV_OK
2623 || !symval
.has_output_value())
2625 to
= symval
.value(this->object_
, 0);
2627 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2629 to
+= this->addend_
;
2630 if (stub_table
== NULL
)
2631 stub_table
= this->object_
->stub_table(this->shndx_
);
2632 if (size
== 64 && target
->abiversion() < 2)
2634 unsigned int dest_shndx
;
2635 to
= target
->symval_for_branch(symtab
, to
, gsym
,
2636 this->object_
, &dest_shndx
);
2638 Address delta
= to
- from
;
2639 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2641 if (stub_table
== NULL
)
2643 gold_warning(_("%s:%s: branch in non-executable section,"
2644 " no long branch stub for you"),
2645 this->object_
->name().c_str(),
2646 this->object_
->section_name(this->shndx_
).c_str());
2649 stub_table
->add_long_branch_entry(this->object_
, to
);
2654 // Relaxation hook. This is where we do stub generation.
2656 template<int size
, bool big_endian
>
2658 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2659 const Input_objects
*,
2660 Symbol_table
* symtab
,
2664 unsigned int prev_brlt_size
= 0;
2668 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
2670 && this->abiversion() < 2
2672 && !parameters
->options().user_set_plt_thread_safe())
2674 static const char* const thread_starter
[] =
2678 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2680 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2681 "mq_notify", "create_timer",
2685 "GOMP_parallel_start",
2686 "GOMP_parallel_loop_static_start",
2687 "GOMP_parallel_loop_dynamic_start",
2688 "GOMP_parallel_loop_guided_start",
2689 "GOMP_parallel_loop_runtime_start",
2690 "GOMP_parallel_sections_start",
2693 if (parameters
->options().shared())
2697 for (unsigned int i
= 0;
2698 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2701 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2702 thread_safe
= (sym
!= NULL
2704 && sym
->in_real_elf());
2710 this->plt_thread_safe_
= thread_safe
;
2711 this->group_sections(layout
, task
);
2714 // We need address of stub tables valid for make_stub.
2715 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2716 p
!= this->stub_tables_
.end();
2719 const Powerpc_relobj
<size
, big_endian
>* object
2720 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2721 Address off
= object
->get_output_section_offset((*p
)->shndx());
2722 gold_assert(off
!= invalid_address
);
2723 Output_section
* os
= (*p
)->output_section();
2724 (*p
)->set_address_and_size(os
, off
);
2729 // Clear plt call stubs, long branch stubs and branch lookup table.
2730 prev_brlt_size
= this->branch_lookup_table_
.size();
2731 this->branch_lookup_table_
.clear();
2732 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2733 p
!= this->stub_tables_
.end();
2736 (*p
)->clear_stubs();
2740 // Build all the stubs.
2741 Stub_table
<size
, big_endian
>* ifunc_stub_table
2742 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2743 Stub_table
<size
, big_endian
>* one_stub_table
2744 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2745 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2746 b
!= this->branch_info_
.end();
2749 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2752 // Did anything change size?
2753 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2754 bool again
= num_huge_branches
!= prev_brlt_size
;
2755 if (size
== 64 && num_huge_branches
!= 0)
2756 this->make_brlt_section(layout
);
2757 if (size
== 64 && again
)
2758 this->brlt_section_
->set_current_size(num_huge_branches
);
2760 typedef Unordered_set
<Output_section
*> Output_sections
;
2761 Output_sections os_need_update
;
2762 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2763 p
!= this->stub_tables_
.end();
2766 if ((*p
)->size_update())
2769 (*p
)->add_eh_frame(layout
);
2770 os_need_update
.insert((*p
)->output_section());
2774 // Set output section offsets for all input sections in an output
2775 // section that just changed size. Anything past the stubs will
2777 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2778 p
!= os_need_update
.end();
2781 Output_section
* os
= *p
;
2783 typedef Output_section::Input_section_list Input_section_list
;
2784 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2785 i
!= os
->input_sections().end();
2788 off
= align_address(off
, i
->addralign());
2789 if (i
->is_input_section() || i
->is_relaxed_input_section())
2790 i
->relobj()->set_section_offset(i
->shndx(), off
);
2791 if (i
->is_relaxed_input_section())
2793 Stub_table
<size
, big_endian
>* stub_table
2794 = static_cast<Stub_table
<size
, big_endian
>*>(
2795 i
->relaxed_input_section());
2796 off
+= stub_table
->set_address_and_size(os
, off
);
2799 off
+= i
->data_size();
2801 // If .branch_lt is part of this output section, then we have
2802 // just done the offset adjustment.
2803 os
->clear_section_offsets_need_adjustment();
2808 && num_huge_branches
!= 0
2809 && parameters
->options().output_is_position_independent())
2811 // Fill in the BRLT relocs.
2812 this->brlt_section_
->reset_brlt_sizes();
2813 for (typename
Branch_lookup_table::const_iterator p
2814 = this->branch_lookup_table_
.begin();
2815 p
!= this->branch_lookup_table_
.end();
2818 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2820 this->brlt_section_
->finalize_brlt_sizes();
2825 template<int size
, bool big_endian
>
2827 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2828 unsigned char* oview
,
2832 uint64_t address
= plt
->address();
2833 off_t len
= plt
->data_size();
2835 if (plt
== this->glink_
)
2837 // See Output_data_glink::do_write() for glink contents.
2840 // There is one word before __glink_PLTresolve
2844 else if (parameters
->options().output_is_position_independent())
2846 // There are two FDEs for a position independent glink.
2847 // The first covers the branch table, the second
2848 // __glink_PLTresolve at the end of glink.
2849 off_t resolve_size
= this->glink_
->pltresolve_size
;
2851 len
-= resolve_size
;
2854 address
+= len
- resolve_size
;
2861 // Must be a stub table.
2862 const Stub_table
<size
, big_endian
>* stub_table
2863 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
2864 uint64_t stub_address
= stub_table
->stub_address();
2865 len
-= stub_address
- address
;
2866 address
= stub_address
;
2869 *paddress
= address
;
2873 // A class to handle the PLT data.
2875 template<int size
, bool big_endian
>
2876 class Output_data_plt_powerpc
: public Output_section_data_build
2879 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2880 size
, big_endian
> Reloc_section
;
2882 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2883 Reloc_section
* plt_rel
,
2885 : Output_section_data_build(size
== 32 ? 4 : 8),
2891 // Add an entry to the PLT.
2896 add_ifunc_entry(Symbol
*);
2899 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2901 // Return the .rela.plt section data.
2908 // Return the number of PLT entries.
2912 if (this->current_data_size() == 0)
2914 return ((this->current_data_size() - this->first_plt_entry_offset())
2915 / this->plt_entry_size());
2920 do_adjust_output_section(Output_section
* os
)
2925 // Write to a map file.
2927 do_print_to_mapfile(Mapfile
* mapfile
) const
2928 { mapfile
->print_output_data(this, this->name_
); }
2931 // Return the offset of the first non-reserved PLT entry.
2933 first_plt_entry_offset() const
2935 // IPLT has no reserved entry.
2936 if (this->name_
[3] == 'I')
2938 return this->targ_
->first_plt_entry_offset();
2941 // Return the size of each PLT entry.
2943 plt_entry_size() const
2945 return this->targ_
->plt_entry_size();
2948 // Write out the PLT data.
2950 do_write(Output_file
*);
2952 // The reloc section.
2953 Reloc_section
* rel_
;
2954 // Allows access to .glink for do_write.
2955 Target_powerpc
<size
, big_endian
>* targ_
;
2956 // What to report in map file.
2960 // Add an entry to the PLT.
2962 template<int size
, bool big_endian
>
2964 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2966 if (!gsym
->has_plt_offset())
2968 section_size_type off
= this->current_data_size();
2970 off
+= this->first_plt_entry_offset();
2971 gsym
->set_plt_offset(off
);
2972 gsym
->set_needs_dynsym_entry();
2973 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2974 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2975 off
+= this->plt_entry_size();
2976 this->set_current_data_size(off
);
2980 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2982 template<int size
, bool big_endian
>
2984 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2986 if (!gsym
->has_plt_offset())
2988 section_size_type off
= this->current_data_size();
2989 gsym
->set_plt_offset(off
);
2990 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2991 if (size
== 64 && this->targ_
->abiversion() < 2)
2992 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2993 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2994 off
+= this->plt_entry_size();
2995 this->set_current_data_size(off
);
2999 // Add an entry for a local ifunc symbol to the IPLT.
3001 template<int size
, bool big_endian
>
3003 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3004 Sized_relobj_file
<size
, big_endian
>* relobj
,
3005 unsigned int local_sym_index
)
3007 if (!relobj
->local_has_plt_offset(local_sym_index
))
3009 section_size_type off
= this->current_data_size();
3010 relobj
->set_local_plt_offset(local_sym_index
, off
);
3011 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3012 if (size
== 64 && this->targ_
->abiversion() < 2)
3013 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3014 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3016 off
+= this->plt_entry_size();
3017 this->set_current_data_size(off
);
3021 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3022 static const uint32_t add_2_2_11
= 0x7c425a14;
3023 static const uint32_t add_3_3_2
= 0x7c631214;
3024 static const uint32_t add_3_3_13
= 0x7c636a14;
3025 static const uint32_t add_11_0_11
= 0x7d605a14;
3026 static const uint32_t add_11_2_11
= 0x7d625a14;
3027 static const uint32_t add_11_11_2
= 0x7d6b1214;
3028 static const uint32_t addi_0_12
= 0x380c0000;
3029 static const uint32_t addi_2_2
= 0x38420000;
3030 static const uint32_t addi_3_3
= 0x38630000;
3031 static const uint32_t addi_11_11
= 0x396b0000;
3032 static const uint32_t addi_12_12
= 0x398c0000;
3033 static const uint32_t addis_0_2
= 0x3c020000;
3034 static const uint32_t addis_0_13
= 0x3c0d0000;
3035 static const uint32_t addis_3_2
= 0x3c620000;
3036 static const uint32_t addis_3_13
= 0x3c6d0000;
3037 static const uint32_t addis_11_2
= 0x3d620000;
3038 static const uint32_t addis_11_11
= 0x3d6b0000;
3039 static const uint32_t addis_11_30
= 0x3d7e0000;
3040 static const uint32_t addis_12_12
= 0x3d8c0000;
3041 static const uint32_t b
= 0x48000000;
3042 static const uint32_t bcl_20_31
= 0x429f0005;
3043 static const uint32_t bctr
= 0x4e800420;
3044 static const uint32_t blr
= 0x4e800020;
3045 static const uint32_t bnectr_p4
= 0x4ce20420;
3046 static const uint32_t cmpldi_2_0
= 0x28220000;
3047 static const uint32_t cror_15_15_15
= 0x4def7b82;
3048 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3049 static const uint32_t ld_0_1
= 0xe8010000;
3050 static const uint32_t ld_0_12
= 0xe80c0000;
3051 static const uint32_t ld_2_1
= 0xe8410000;
3052 static const uint32_t ld_2_2
= 0xe8420000;
3053 static const uint32_t ld_2_11
= 0xe84b0000;
3054 static const uint32_t ld_11_2
= 0xe9620000;
3055 static const uint32_t ld_11_11
= 0xe96b0000;
3056 static const uint32_t ld_12_2
= 0xe9820000;
3057 static const uint32_t ld_12_11
= 0xe98b0000;
3058 static const uint32_t ld_12_12
= 0xe98c0000;
3059 static const uint32_t lfd_0_1
= 0xc8010000;
3060 static const uint32_t li_0_0
= 0x38000000;
3061 static const uint32_t li_12_0
= 0x39800000;
3062 static const uint32_t lis_0_0
= 0x3c000000;
3063 static const uint32_t lis_11
= 0x3d600000;
3064 static const uint32_t lis_12
= 0x3d800000;
3065 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3066 static const uint32_t lwz_0_12
= 0x800c0000;
3067 static const uint32_t lwz_11_11
= 0x816b0000;
3068 static const uint32_t lwz_11_30
= 0x817e0000;
3069 static const uint32_t lwz_12_12
= 0x818c0000;
3070 static const uint32_t lwzu_0_12
= 0x840c0000;
3071 static const uint32_t mflr_0
= 0x7c0802a6;
3072 static const uint32_t mflr_11
= 0x7d6802a6;
3073 static const uint32_t mflr_12
= 0x7d8802a6;
3074 static const uint32_t mtctr_0
= 0x7c0903a6;
3075 static const uint32_t mtctr_11
= 0x7d6903a6;
3076 static const uint32_t mtctr_12
= 0x7d8903a6;
3077 static const uint32_t mtlr_0
= 0x7c0803a6;
3078 static const uint32_t mtlr_12
= 0x7d8803a6;
3079 static const uint32_t nop
= 0x60000000;
3080 static const uint32_t ori_0_0_0
= 0x60000000;
3081 static const uint32_t srdi_0_0_2
= 0x7800f082;
3082 static const uint32_t std_0_1
= 0xf8010000;
3083 static const uint32_t std_0_12
= 0xf80c0000;
3084 static const uint32_t std_2_1
= 0xf8410000;
3085 static const uint32_t stfd_0_1
= 0xd8010000;
3086 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3087 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3088 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3089 static const uint32_t xor_2_12_12
= 0x7d826278;
3090 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3092 // Write out the PLT.
3094 template<int size
, bool big_endian
>
3096 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3098 if (size
== 32 && this->name_
[3] != 'I')
3100 const section_size_type offset
= this->offset();
3101 const section_size_type oview_size
3102 = convert_to_section_size_type(this->data_size());
3103 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3104 unsigned char* pov
= oview
;
3105 unsigned char* endpov
= oview
+ oview_size
;
3107 // The address of the .glink branch table
3108 const Output_data_glink
<size
, big_endian
>* glink
3109 = this->targ_
->glink_section();
3110 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3112 while (pov
< endpov
)
3114 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3119 of
->write_output_view(offset
, oview_size
, oview
);
3123 // Create the PLT section.
3125 template<int size
, bool big_endian
>
3127 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3130 if (this->plt_
== NULL
)
3132 if (this->got_
== NULL
)
3133 this->got_section(symtab
, layout
);
3135 if (this->glink_
== NULL
)
3136 make_glink_section(layout
);
3138 // Ensure that .rela.dyn always appears before .rela.plt This is
3139 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3140 // needs to include .rela.plt in its range.
3141 this->rela_dyn_section(layout
);
3143 Reloc_section
* plt_rel
= new Reloc_section(false);
3144 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3145 elfcpp::SHF_ALLOC
, plt_rel
,
3146 ORDER_DYNAMIC_PLT_RELOCS
, false);
3148 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3150 layout
->add_output_section_data(".plt",
3152 ? elfcpp::SHT_PROGBITS
3153 : elfcpp::SHT_NOBITS
),
3154 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3163 // Create the IPLT section.
3165 template<int size
, bool big_endian
>
3167 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3170 if (this->iplt_
== NULL
)
3172 this->make_plt_section(symtab
, layout
);
3174 Reloc_section
* iplt_rel
= new Reloc_section(false);
3175 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3177 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3179 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3183 // A section for huge long branch addresses, similar to plt section.
3185 template<int size
, bool big_endian
>
3186 class Output_data_brlt_powerpc
: public Output_section_data_build
3189 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3190 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3191 size
, big_endian
> Reloc_section
;
3193 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3194 Reloc_section
* brlt_rel
)
3195 : Output_section_data_build(size
== 32 ? 4 : 8),
3203 this->reset_data_size();
3204 this->rel_
->reset_data_size();
3208 finalize_brlt_sizes()
3210 this->finalize_data_size();
3211 this->rel_
->finalize_data_size();
3214 // Add a reloc for an entry in the BRLT.
3216 add_reloc(Address to
, unsigned int off
)
3217 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3219 // Update section and reloc section size.
3221 set_current_size(unsigned int num_branches
)
3223 this->reset_address_and_file_offset();
3224 this->set_current_data_size(num_branches
* 16);
3225 this->finalize_data_size();
3226 Output_section
* os
= this->output_section();
3227 os
->set_section_offsets_need_adjustment();
3228 if (this->rel_
!= NULL
)
3230 unsigned int reloc_size
3231 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3232 this->rel_
->reset_address_and_file_offset();
3233 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3234 this->rel_
->finalize_data_size();
3235 Output_section
* os
= this->rel_
->output_section();
3236 os
->set_section_offsets_need_adjustment();
3242 do_adjust_output_section(Output_section
* os
)
3247 // Write to a map file.
3249 do_print_to_mapfile(Mapfile
* mapfile
) const
3250 { mapfile
->print_output_data(this, "** BRLT"); }
3253 // Write out the BRLT data.
3255 do_write(Output_file
*);
3257 // The reloc section.
3258 Reloc_section
* rel_
;
3259 Target_powerpc
<size
, big_endian
>* targ_
;
3262 // Make the branch lookup table section.
3264 template<int size
, bool big_endian
>
3266 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3268 if (size
== 64 && this->brlt_section_
== NULL
)
3270 Reloc_section
* brlt_rel
= NULL
;
3271 bool is_pic
= parameters
->options().output_is_position_independent();
3274 // When PIC we can't fill in .branch_lt (like .plt it can be
3275 // a bss style section) but must initialise at runtime via
3276 // dynamic relocats.
3277 this->rela_dyn_section(layout
);
3278 brlt_rel
= new Reloc_section(false);
3279 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3282 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3283 if (this->plt_
&& is_pic
)
3284 this->plt_
->output_section()
3285 ->add_output_section_data(this->brlt_section_
);
3287 layout
->add_output_section_data(".branch_lt",
3288 (is_pic
? elfcpp::SHT_NOBITS
3289 : elfcpp::SHT_PROGBITS
),
3290 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3291 this->brlt_section_
,
3292 (is_pic
? ORDER_SMALL_BSS
3293 : ORDER_SMALL_DATA
),
3298 // Write out .branch_lt when non-PIC.
3300 template<int size
, bool big_endian
>
3302 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3304 if (size
== 64 && !parameters
->options().output_is_position_independent())
3306 const section_size_type offset
= this->offset();
3307 const section_size_type oview_size
3308 = convert_to_section_size_type(this->data_size());
3309 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3311 this->targ_
->write_branch_lookup_table(oview
);
3312 of
->write_output_view(offset
, oview_size
, oview
);
3316 static inline uint32_t
3322 static inline uint32_t
3328 static inline uint32_t
3331 return hi(a
+ 0x8000);
3337 static const unsigned char eh_frame_cie
[12];
3341 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3344 'z', 'R', 0, // Augmentation string.
3345 4, // Code alignment.
3346 0x80 - size
/ 8 , // Data alignment.
3348 1, // Augmentation size.
3349 (elfcpp::DW_EH_PE_pcrel
3350 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3351 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3354 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3355 static const unsigned char glink_eh_frame_fde_64v1
[] =
3357 0, 0, 0, 0, // Replaced with offset to .glink.
3358 0, 0, 0, 0, // Replaced with size of .glink.
3359 0, // Augmentation size.
3360 elfcpp::DW_CFA_advance_loc
+ 1,
3361 elfcpp::DW_CFA_register
, 65, 12,
3362 elfcpp::DW_CFA_advance_loc
+ 4,
3363 elfcpp::DW_CFA_restore_extended
, 65
3366 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3367 static const unsigned char glink_eh_frame_fde_64v2
[] =
3369 0, 0, 0, 0, // Replaced with offset to .glink.
3370 0, 0, 0, 0, // Replaced with size of .glink.
3371 0, // Augmentation size.
3372 elfcpp::DW_CFA_advance_loc
+ 1,
3373 elfcpp::DW_CFA_register
, 65, 0,
3374 elfcpp::DW_CFA_advance_loc
+ 4,
3375 elfcpp::DW_CFA_restore_extended
, 65
3378 // Describe __glink_PLTresolve use of LR, 32-bit version.
3379 static const unsigned char glink_eh_frame_fde_32
[] =
3381 0, 0, 0, 0, // Replaced with offset to .glink.
3382 0, 0, 0, 0, // Replaced with size of .glink.
3383 0, // Augmentation size.
3384 elfcpp::DW_CFA_advance_loc
+ 2,
3385 elfcpp::DW_CFA_register
, 65, 0,
3386 elfcpp::DW_CFA_advance_loc
+ 4,
3387 elfcpp::DW_CFA_restore_extended
, 65
3390 static const unsigned char default_fde
[] =
3392 0, 0, 0, 0, // Replaced with offset to stubs.
3393 0, 0, 0, 0, // Replaced with size of stubs.
3394 0, // Augmentation size.
3395 elfcpp::DW_CFA_nop
, // Pad.
3400 template<bool big_endian
>
3402 write_insn(unsigned char* p
, uint32_t v
)
3404 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3407 // Stub_table holds information about plt and long branch stubs.
3408 // Stubs are built in an area following some input section determined
3409 // by group_sections(). This input section is converted to a relaxed
3410 // input section allowing it to be resized to accommodate the stubs
3412 template<int size
, bool big_endian
>
3413 class Stub_table
: public Output_relaxed_input_section
3416 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3417 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3419 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
3420 : Output_relaxed_input_section(NULL
, 0, 0),
3421 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3422 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
3423 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3426 // Delayed Output_relaxed_input_section init.
3428 init(const Output_section::Input_section
*, Output_section
*);
3430 // Add a plt call stub.
3432 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3438 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3443 // Find a given plt call stub.
3445 find_plt_call_entry(const Symbol
*) const;
3448 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3449 unsigned int) const;
3452 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3458 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3463 // Add a long branch stub.
3465 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
3468 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3474 this->plt_call_stubs_
.clear();
3475 this->plt_size_
= 0;
3476 this->long_branch_stubs_
.clear();
3477 this->branch_size_
= 0;
3481 set_address_and_size(const Output_section
* os
, Address off
)
3483 Address start_off
= off
;
3484 off
+= this->orig_data_size_
;
3485 Address my_size
= this->plt_size_
+ this->branch_size_
;
3487 off
= align_address(off
, this->stub_align());
3488 // Include original section size and alignment padding in size
3489 my_size
+= off
- start_off
;
3490 this->reset_address_and_file_offset();
3491 this->set_current_data_size(my_size
);
3492 this->set_address_and_file_offset(os
->address() + start_off
,
3493 os
->offset() + start_off
);
3498 stub_address() const
3500 return align_address(this->address() + this->orig_data_size_
,
3501 this->stub_align());
3507 return align_address(this->offset() + this->orig_data_size_
,
3508 this->stub_align());
3513 { return this->plt_size_
; }
3518 Output_section
* os
= this->output_section();
3519 if (os
->addralign() < this->stub_align())
3521 os
->set_addralign(this->stub_align());
3522 // FIXME: get rid of the insane checkpointing.
3523 // We can't increase alignment of the input section to which
3524 // stubs are attached; The input section may be .init which
3525 // is pasted together with other .init sections to form a
3526 // function. Aligning might insert zero padding resulting in
3527 // sigill. However we do need to increase alignment of the
3528 // output section so that the align_address() on offset in
3529 // set_address_and_size() adds the same padding as the
3530 // align_address() on address in stub_address().
3531 // What's more, we need this alignment for the layout done in
3532 // relaxation_loop_body() so that the output section starts at
3533 // a suitably aligned address.
3534 os
->checkpoint_set_addralign(this->stub_align());
3536 if (this->last_plt_size_
!= this->plt_size_
3537 || this->last_branch_size_
!= this->branch_size_
)
3539 this->last_plt_size_
= this->plt_size_
;
3540 this->last_branch_size_
= this->branch_size_
;
3546 // Add .eh_frame info for this stub section. Unlike other linker
3547 // generated .eh_frame this is added late in the link, because we
3548 // only want the .eh_frame info if this particular stub section is
3551 add_eh_frame(Layout
* layout
)
3553 if (!this->eh_frame_added_
)
3555 if (!parameters
->options().ld_generated_unwind_info())
3558 // Since we add stub .eh_frame info late, it must be placed
3559 // after all other linker generated .eh_frame info so that
3560 // merge mapping need not be updated for input sections.
3561 // There is no provision to use a different CIE to that used
3563 if (!this->targ_
->has_glink())
3566 layout
->add_eh_frame_for_plt(this,
3567 Eh_cie
<size
>::eh_frame_cie
,
3568 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3570 sizeof (default_fde
));
3571 this->eh_frame_added_
= true;
3575 Target_powerpc
<size
, big_endian
>*
3581 class Plt_stub_ent_hash
;
3582 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3583 Plt_stub_ent_hash
> Plt_stub_entries
;
3585 // Alignment of stub section.
3591 unsigned int min_align
= 32;
3592 unsigned int user_align
= 1 << parameters
->options().plt_align();
3593 return std::max(user_align
, min_align
);
3596 // Return the plt offset for the given call stub.
3598 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3600 const Symbol
* gsym
= p
->first
.sym_
;
3603 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3604 && gsym
->can_use_relative_reloc(false));
3605 return gsym
->plt_offset();
3610 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3611 unsigned int local_sym_index
= p
->first
.locsym_
;
3612 return relobj
->local_plt_offset(local_sym_index
);
3616 // Size of a given plt call stub.
3618 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3624 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3626 plt_addr
+= this->targ_
->iplt_section()->address();
3628 plt_addr
+= this->targ_
->plt_section()->address();
3629 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3630 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3631 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3632 got_addr
+= ppcobj
->toc_base_offset();
3633 Address off
= plt_addr
- got_addr
;
3634 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3635 if (this->targ_
->abiversion() < 2)
3637 bool static_chain
= parameters
->options().plt_static_chain();
3638 bool thread_safe
= this->targ_
->plt_thread_safe();
3642 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3644 unsigned int align
= 1 << parameters
->options().plt_align();
3646 bytes
= (bytes
+ align
- 1) & -align
;
3650 // Return long branch stub size.
3652 branch_stub_size(Address to
)
3655 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3656 if (to
- loc
+ (1 << 25) < 2 << 25)
3658 if (size
== 64 || !parameters
->options().output_is_position_independent())
3665 do_write(Output_file
*);
3667 // Plt call stub keys.
3671 Plt_stub_ent(const Symbol
* sym
)
3672 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3675 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3676 unsigned int locsym_index
)
3677 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3680 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3682 unsigned int r_type
,
3684 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3687 this->addend_
= addend
;
3688 else if (parameters
->options().output_is_position_independent()
3689 && r_type
== elfcpp::R_PPC_PLTREL24
)
3691 this->addend_
= addend
;
3692 if (this->addend_
>= 32768)
3693 this->object_
= object
;
3697 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3698 unsigned int locsym_index
,
3699 unsigned int r_type
,
3701 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3704 this->addend_
= addend
;
3705 else if (parameters
->options().output_is_position_independent()
3706 && r_type
== elfcpp::R_PPC_PLTREL24
)
3707 this->addend_
= addend
;
3710 bool operator==(const Plt_stub_ent
& that
) const
3712 return (this->sym_
== that
.sym_
3713 && this->object_
== that
.object_
3714 && this->addend_
== that
.addend_
3715 && this->locsym_
== that
.locsym_
);
3719 const Sized_relobj_file
<size
, big_endian
>* object_
;
3720 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3721 unsigned int locsym_
;
3724 class Plt_stub_ent_hash
3727 size_t operator()(const Plt_stub_ent
& ent
) const
3729 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3730 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3736 // Long branch stub keys.
3737 class Branch_stub_ent
3740 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3741 : dest_(to
), toc_base_off_(0)
3744 toc_base_off_
= obj
->toc_base_offset();
3747 bool operator==(const Branch_stub_ent
& that
) const
3749 return (this->dest_
== that
.dest_
3751 || this->toc_base_off_
== that
.toc_base_off_
));
3755 unsigned int toc_base_off_
;
3758 class Branch_stub_ent_hash
3761 size_t operator()(const Branch_stub_ent
& ent
) const
3762 { return ent
.dest_
^ ent
.toc_base_off_
; }
3765 // In a sane world this would be a global.
3766 Target_powerpc
<size
, big_endian
>* targ_
;
3767 // Map sym/object/addend to stub offset.
3768 Plt_stub_entries plt_call_stubs_
;
3769 // Map destination address to stub offset.
3770 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3771 Branch_stub_ent_hash
> Branch_stub_entries
;
3772 Branch_stub_entries long_branch_stubs_
;
3773 // size of input section
3774 section_size_type orig_data_size_
;
3776 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3777 // Whether .eh_frame info has been created for this stub section.
3778 bool eh_frame_added_
;
3781 // Make a new stub table, and record.
3783 template<int size
, bool big_endian
>
3784 Stub_table
<size
, big_endian
>*
3785 Target_powerpc
<size
, big_endian
>::new_stub_table()
3787 Stub_table
<size
, big_endian
>* stub_table
3788 = new Stub_table
<size
, big_endian
>(this);
3789 this->stub_tables_
.push_back(stub_table
);
3793 // Delayed stub table initialisation, because we create the stub table
3794 // before we know to which section it will be attached.
3796 template<int size
, bool big_endian
>
3798 Stub_table
<size
, big_endian
>::init(
3799 const Output_section::Input_section
* owner
,
3800 Output_section
* output_section
)
3802 this->set_relobj(owner
->relobj());
3803 this->set_shndx(owner
->shndx());
3804 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3805 this->set_output_section(output_section
);
3806 this->orig_data_size_
= owner
->current_data_size();
3808 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3809 new_relaxed
.push_back(this);
3810 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3813 // Add a plt call stub, if we do not already have one for this
3814 // sym/object/addend combo.
3816 template<int size
, bool big_endian
>
3818 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3819 const Sized_relobj_file
<size
, big_endian
>* object
,
3821 unsigned int r_type
,
3824 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3825 unsigned int off
= this->plt_size_
;
3826 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3827 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3829 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3832 template<int size
, bool big_endian
>
3834 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3835 const Sized_relobj_file
<size
, big_endian
>* object
,
3836 unsigned int locsym_index
,
3837 unsigned int r_type
,
3840 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3841 unsigned int off
= this->plt_size_
;
3842 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3843 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3845 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3848 // Find a plt call stub.
3850 template<int size
, bool big_endian
>
3851 typename Stub_table
<size
, big_endian
>::Address
3852 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3853 const Sized_relobj_file
<size
, big_endian
>* object
,
3855 unsigned int r_type
,
3856 Address addend
) const
3858 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3859 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3860 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3863 template<int size
, bool big_endian
>
3864 typename Stub_table
<size
, big_endian
>::Address
3865 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3867 Plt_stub_ent
ent(gsym
);
3868 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3869 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3872 template<int size
, bool big_endian
>
3873 typename Stub_table
<size
, big_endian
>::Address
3874 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3875 const Sized_relobj_file
<size
, big_endian
>* object
,
3876 unsigned int locsym_index
,
3877 unsigned int r_type
,
3878 Address addend
) const
3880 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3881 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3882 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3885 template<int size
, bool big_endian
>
3886 typename Stub_table
<size
, big_endian
>::Address
3887 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3888 const Sized_relobj_file
<size
, big_endian
>* object
,
3889 unsigned int locsym_index
) const
3891 Plt_stub_ent
ent(object
, locsym_index
);
3892 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3893 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3896 // Add a long branch stub if we don't already have one to given
3899 template<int size
, bool big_endian
>
3901 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3902 const Powerpc_relobj
<size
, big_endian
>* object
,
3905 Branch_stub_ent
ent(object
, to
);
3906 Address off
= this->branch_size_
;
3907 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3909 unsigned int stub_size
= this->branch_stub_size(to
);
3910 this->branch_size_
= off
+ stub_size
;
3911 if (size
== 64 && stub_size
!= 4)
3912 this->targ_
->add_branch_lookup_table(to
);
3916 // Find long branch stub.
3918 template<int size
, bool big_endian
>
3919 typename Stub_table
<size
, big_endian
>::Address
3920 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3921 const Powerpc_relobj
<size
, big_endian
>* object
,
3924 Branch_stub_ent
ent(object
, to
);
3925 typename
Branch_stub_entries::const_iterator p
3926 = this->long_branch_stubs_
.find(ent
);
3927 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3930 // A class to handle .glink.
3932 template<int size
, bool big_endian
>
3933 class Output_data_glink
: public Output_section_data
3936 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3937 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3938 static const int pltresolve_size
= 16*4;
3940 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3941 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
3942 end_branch_table_(), ge_size_(0)
3946 add_eh_frame(Layout
* layout
);
3949 add_global_entry(const Symbol
*);
3952 find_global_entry(const Symbol
*) const;
3955 global_entry_address() const
3957 gold_assert(this->is_data_size_valid());
3958 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
3959 return this->address() + global_entry_off
;
3963 // Write to a map file.
3965 do_print_to_mapfile(Mapfile
* mapfile
) const
3966 { mapfile
->print_output_data(this, _("** glink")); }
3970 set_final_data_size();
3974 do_write(Output_file
*);
3976 // Allows access to .got and .plt for do_write.
3977 Target_powerpc
<size
, big_endian
>* targ_
;
3979 // Map sym to stub offset.
3980 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
3981 Global_entry_stub_entries global_entry_stubs_
;
3983 unsigned int end_branch_table_
, ge_size_
;
3986 template<int size
, bool big_endian
>
3988 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
3990 if (!parameters
->options().ld_generated_unwind_info())
3995 if (this->targ_
->abiversion() < 2)
3996 layout
->add_eh_frame_for_plt(this,
3997 Eh_cie
<64>::eh_frame_cie
,
3998 sizeof (Eh_cie
<64>::eh_frame_cie
),
3999 glink_eh_frame_fde_64v1
,
4000 sizeof (glink_eh_frame_fde_64v1
));
4002 layout
->add_eh_frame_for_plt(this,
4003 Eh_cie
<64>::eh_frame_cie
,
4004 sizeof (Eh_cie
<64>::eh_frame_cie
),
4005 glink_eh_frame_fde_64v2
,
4006 sizeof (glink_eh_frame_fde_64v2
));
4010 // 32-bit .glink can use the default since the CIE return
4011 // address reg, LR, is valid.
4012 layout
->add_eh_frame_for_plt(this,
4013 Eh_cie
<32>::eh_frame_cie
,
4014 sizeof (Eh_cie
<32>::eh_frame_cie
),
4016 sizeof (default_fde
));
4017 // Except where LR is used in a PIC __glink_PLTresolve.
4018 if (parameters
->options().output_is_position_independent())
4019 layout
->add_eh_frame_for_plt(this,
4020 Eh_cie
<32>::eh_frame_cie
,
4021 sizeof (Eh_cie
<32>::eh_frame_cie
),
4022 glink_eh_frame_fde_32
,
4023 sizeof (glink_eh_frame_fde_32
));
4027 template<int size
, bool big_endian
>
4029 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4031 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4032 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4034 this->ge_size_
+= 16;
4037 template<int size
, bool big_endian
>
4038 typename Output_data_glink
<size
, big_endian
>::Address
4039 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4041 typename
Global_entry_stub_entries::const_iterator p
4042 = this->global_entry_stubs_
.find(gsym
);
4043 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4046 template<int size
, bool big_endian
>
4048 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4050 unsigned int count
= this->targ_
->plt_entry_count();
4051 section_size_type total
= 0;
4057 // space for branch table
4058 total
+= 4 * (count
- 1);
4060 total
+= -total
& 15;
4061 total
+= this->pltresolve_size
;
4065 total
+= this->pltresolve_size
;
4067 // space for branch table
4069 if (this->targ_
->abiversion() < 2)
4073 total
+= 4 * (count
- 0x8000);
4077 this->end_branch_table_
= total
;
4078 total
= (total
+ 15) & -16;
4079 total
+= this->ge_size_
;
4081 this->set_data_size(total
);
4084 // Write out plt and long branch stub code.
4086 template<int size
, bool big_endian
>
4088 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4090 if (this->plt_call_stubs_
.empty()
4091 && this->long_branch_stubs_
.empty())
4094 const section_size_type start_off
= this->offset();
4095 const section_size_type off
= this->stub_offset();
4096 const section_size_type oview_size
=
4097 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4098 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4103 const Output_data_got_powerpc
<size
, big_endian
>* got
4104 = this->targ_
->got_section();
4105 Address got_os_addr
= got
->output_section()->address();
4107 if (!this->plt_call_stubs_
.empty())
4109 // The base address of the .plt section.
4110 Address plt_base
= this->targ_
->plt_section()->address();
4111 Address iplt_base
= invalid_address
;
4113 // Write out plt call stubs.
4114 typename
Plt_stub_entries::const_iterator cs
;
4115 for (cs
= this->plt_call_stubs_
.begin();
4116 cs
!= this->plt_call_stubs_
.end();
4120 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4121 Address plt_addr
= pltoff
;
4124 if (iplt_base
== invalid_address
)
4125 iplt_base
= this->targ_
->iplt_section()->address();
4126 plt_addr
+= iplt_base
;
4129 plt_addr
+= plt_base
;
4130 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4131 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4132 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4133 Address off
= plt_addr
- got_addr
;
4135 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4136 gold_error(_("%s: linkage table error against `%s'"),
4137 cs
->first
.object_
->name().c_str(),
4138 cs
->first
.sym_
->demangled_name().c_str());
4140 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4142 = plt_load_toc
&& parameters
->options().plt_static_chain();
4144 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4145 bool use_fake_dep
= false;
4146 Address cmp_branch_off
= 0;
4149 unsigned int pltindex
4150 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4151 / this->targ_
->plt_entry_size());
4153 = (this->targ_
->glink_section()->pltresolve_size
4155 if (pltindex
> 32768)
4156 glinkoff
+= (pltindex
- 32768) * 4;
4158 = this->targ_
->glink_section()->address() + glinkoff
;
4160 = (this->stub_address() + cs
->second
+ 24
4161 + 4 * (ha(off
) != 0)
4162 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4163 + 4 * static_chain
);
4164 cmp_branch_off
= to
- from
;
4165 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4168 p
= oview
+ cs
->second
;
4171 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4173 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4175 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4178 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4180 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4184 write_insn
<big_endian
>(p
, mtctr_12
);
4190 write_insn
<big_endian
>(p
, xor_2_12_12
);
4192 write_insn
<big_endian
>(p
, add_11_11_2
);
4195 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4199 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4206 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4208 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4211 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4213 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4217 write_insn
<big_endian
>(p
, mtctr_12
);
4223 write_insn
<big_endian
>(p
, xor_11_12_12
);
4225 write_insn
<big_endian
>(p
, add_2_2_11
);
4230 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4233 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4237 if (thread_safe
&& !use_fake_dep
)
4239 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4241 write_insn
<big_endian
>(p
, bnectr_p4
);
4243 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4246 write_insn
<big_endian
>(p
, bctr
);
4250 // Write out long branch stubs.
4251 typename
Branch_stub_entries::const_iterator bs
;
4252 for (bs
= this->long_branch_stubs_
.begin();
4253 bs
!= this->long_branch_stubs_
.end();
4256 p
= oview
+ this->plt_size_
+ bs
->second
;
4257 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4258 Address delta
= bs
->first
.dest_
- loc
;
4259 if (delta
+ (1 << 25) < 2 << 25)
4260 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4264 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4265 gold_assert(brlt_addr
!= invalid_address
);
4266 brlt_addr
+= this->targ_
->brlt_section()->address();
4267 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4268 Address brltoff
= brlt_addr
- got_addr
;
4269 if (ha(brltoff
) == 0)
4271 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4275 write_insn
<big_endian
>(p
, addis_11_2
+ ha(brltoff
)), p
+= 4;
4276 write_insn
<big_endian
>(p
, ld_12_11
+ l(brltoff
)), p
+= 4;
4278 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4279 write_insn
<big_endian
>(p
, bctr
);
4285 if (!this->plt_call_stubs_
.empty())
4287 // The base address of the .plt section.
4288 Address plt_base
= this->targ_
->plt_section()->address();
4289 Address iplt_base
= invalid_address
;
4290 // The address of _GLOBAL_OFFSET_TABLE_.
4291 Address g_o_t
= invalid_address
;
4293 // Write out plt call stubs.
4294 typename
Plt_stub_entries::const_iterator cs
;
4295 for (cs
= this->plt_call_stubs_
.begin();
4296 cs
!= this->plt_call_stubs_
.end();
4300 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4303 if (iplt_base
== invalid_address
)
4304 iplt_base
= this->targ_
->iplt_section()->address();
4305 plt_addr
+= iplt_base
;
4308 plt_addr
+= plt_base
;
4310 p
= oview
+ cs
->second
;
4311 if (parameters
->options().output_is_position_independent())
4314 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4315 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4316 (cs
->first
.object_
));
4317 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4319 unsigned int got2
= ppcobj
->got2_shndx();
4320 got_addr
= ppcobj
->get_output_section_offset(got2
);
4321 gold_assert(got_addr
!= invalid_address
);
4322 got_addr
+= (ppcobj
->output_section(got2
)->address()
4323 + cs
->first
.addend_
);
4327 if (g_o_t
== invalid_address
)
4329 const Output_data_got_powerpc
<size
, big_endian
>* got
4330 = this->targ_
->got_section();
4331 g_o_t
= got
->address() + got
->g_o_t();
4336 Address off
= plt_addr
- got_addr
;
4339 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4340 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4341 write_insn
<big_endian
>(p
+ 8, bctr
);
4345 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4346 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4347 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4348 write_insn
<big_endian
>(p
+ 12, bctr
);
4353 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4354 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4355 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4356 write_insn
<big_endian
>(p
+ 12, bctr
);
4361 // Write out long branch stubs.
4362 typename
Branch_stub_entries::const_iterator bs
;
4363 for (bs
= this->long_branch_stubs_
.begin();
4364 bs
!= this->long_branch_stubs_
.end();
4367 p
= oview
+ this->plt_size_
+ bs
->second
;
4368 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4369 Address delta
= bs
->first
.dest_
- loc
;
4370 if (delta
+ (1 << 25) < 2 << 25)
4371 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4372 else if (!parameters
->options().output_is_position_independent())
4374 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4375 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4376 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4377 write_insn
<big_endian
>(p
+ 12, bctr
);
4382 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4383 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4384 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4385 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4386 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4387 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4388 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4389 write_insn
<big_endian
>(p
+ 28, bctr
);
4395 // Write out .glink.
4397 template<int size
, bool big_endian
>
4399 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4401 const section_size_type off
= this->offset();
4402 const section_size_type oview_size
=
4403 convert_to_section_size_type(this->data_size());
4404 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4407 // The base address of the .plt section.
4408 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4409 Address plt_base
= this->targ_
->plt_section()->address();
4413 if (this->end_branch_table_
!= 0)
4415 // Write pltresolve stub.
4417 Address after_bcl
= this->address() + 16;
4418 Address pltoff
= plt_base
- after_bcl
;
4420 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4422 if (this->targ_
->abiversion() < 2)
4424 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4425 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4426 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4427 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4428 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4429 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4430 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4431 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4432 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4433 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4437 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4438 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4439 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4440 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4441 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4442 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4443 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4444 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4445 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4446 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4447 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4448 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4450 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4451 while (p
< oview
+ this->pltresolve_size
)
4452 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4454 // Write lazy link call stubs.
4456 while (p
< oview
+ this->end_branch_table_
)
4458 if (this->targ_
->abiversion() < 2)
4462 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4466 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
4467 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4470 uint32_t branch_off
= 8 - (p
- oview
);
4471 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4476 Address plt_base
= this->targ_
->plt_section()->address();
4477 Address iplt_base
= invalid_address
;
4478 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4479 Address global_entry_base
= this->address() + global_entry_off
;
4480 typename
Global_entry_stub_entries::const_iterator ge
;
4481 for (ge
= this->global_entry_stubs_
.begin();
4482 ge
!= this->global_entry_stubs_
.end();
4485 p
= oview
+ global_entry_off
+ ge
->second
;
4486 Address plt_addr
= ge
->first
->plt_offset();
4487 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4488 && ge
->first
->can_use_relative_reloc(false))
4490 if (iplt_base
== invalid_address
)
4491 iplt_base
= this->targ_
->iplt_section()->address();
4492 plt_addr
+= iplt_base
;
4495 plt_addr
+= plt_base
;
4496 Address my_addr
= global_entry_base
+ ge
->second
;
4497 Address off
= plt_addr
- my_addr
;
4499 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4500 gold_error(_("%s: linkage table error against `%s'"),
4501 ge
->first
->object()->name().c_str(),
4502 ge
->first
->demangled_name().c_str());
4504 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4505 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4506 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4507 write_insn
<big_endian
>(p
, bctr
);
4512 const Output_data_got_powerpc
<size
, big_endian
>* got
4513 = this->targ_
->got_section();
4514 // The address of _GLOBAL_OFFSET_TABLE_.
4515 Address g_o_t
= got
->address() + got
->g_o_t();
4517 // Write out pltresolve branch table.
4519 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4520 unsigned char* end_p
= oview
+ the_end
;
4521 while (p
< end_p
- 8 * 4)
4522 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4524 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4526 // Write out pltresolve call stub.
4527 if (parameters
->options().output_is_position_independent())
4529 Address res0_off
= 0;
4530 Address after_bcl_off
= the_end
+ 12;
4531 Address bcl_res0
= after_bcl_off
- res0_off
;
4533 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4534 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4535 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4536 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4537 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4538 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4539 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4541 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4543 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4544 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4546 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4547 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4551 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4552 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4554 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4555 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4556 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4557 write_insn
<big_endian
>(p
+ 52, bctr
);
4558 write_insn
<big_endian
>(p
+ 56, nop
);
4559 write_insn
<big_endian
>(p
+ 60, nop
);
4563 Address res0
= this->address();
4565 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4566 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4567 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4568 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4570 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4571 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4572 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4573 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4574 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4575 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4577 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4578 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4579 write_insn
<big_endian
>(p
+ 32, bctr
);
4580 write_insn
<big_endian
>(p
+ 36, nop
);
4581 write_insn
<big_endian
>(p
+ 40, nop
);
4582 write_insn
<big_endian
>(p
+ 44, nop
);
4583 write_insn
<big_endian
>(p
+ 48, nop
);
4584 write_insn
<big_endian
>(p
+ 52, nop
);
4585 write_insn
<big_endian
>(p
+ 56, nop
);
4586 write_insn
<big_endian
>(p
+ 60, nop
);
4591 of
->write_output_view(off
, oview_size
, oview
);
4595 // A class to handle linker generated save/restore functions.
4597 template<int size
, bool big_endian
>
4598 class Output_data_save_res
: public Output_section_data_build
4601 Output_data_save_res(Symbol_table
* symtab
);
4604 // Write to a map file.
4606 do_print_to_mapfile(Mapfile
* mapfile
) const
4607 { mapfile
->print_output_data(this, _("** save/restore")); }
4610 do_write(Output_file
*);
4613 // The maximum size of save/restore contents.
4614 static const unsigned int savres_max
= 218*4;
4617 savres_define(Symbol_table
* symtab
,
4619 unsigned int lo
, unsigned int hi
,
4620 unsigned char* write_ent(unsigned char*, int),
4621 unsigned char* write_tail(unsigned char*, int));
4623 unsigned char *contents_
;
4626 template<bool big_endian
>
4627 static unsigned char*
4628 savegpr0(unsigned char* p
, int r
)
4630 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4631 write_insn
<big_endian
>(p
, insn
);
4635 template<bool big_endian
>
4636 static unsigned char*
4637 savegpr0_tail(unsigned char* p
, int r
)
4639 p
= savegpr0
<big_endian
>(p
, r
);
4640 uint32_t insn
= std_0_1
+ 16;
4641 write_insn
<big_endian
>(p
, insn
);
4643 write_insn
<big_endian
>(p
, blr
);
4647 template<bool big_endian
>
4648 static unsigned char*
4649 restgpr0(unsigned char* p
, int r
)
4651 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4652 write_insn
<big_endian
>(p
, insn
);
4656 template<bool big_endian
>
4657 static unsigned char*
4658 restgpr0_tail(unsigned char* p
, int r
)
4660 uint32_t insn
= ld_0_1
+ 16;
4661 write_insn
<big_endian
>(p
, insn
);
4663 p
= restgpr0
<big_endian
>(p
, r
);
4664 write_insn
<big_endian
>(p
, mtlr_0
);
4668 p
= restgpr0
<big_endian
>(p
, 30);
4669 p
= restgpr0
<big_endian
>(p
, 31);
4671 write_insn
<big_endian
>(p
, blr
);
4675 template<bool big_endian
>
4676 static unsigned char*
4677 savegpr1(unsigned char* p
, int r
)
4679 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4680 write_insn
<big_endian
>(p
, insn
);
4684 template<bool big_endian
>
4685 static unsigned char*
4686 savegpr1_tail(unsigned char* p
, int r
)
4688 p
= savegpr1
<big_endian
>(p
, r
);
4689 write_insn
<big_endian
>(p
, blr
);
4693 template<bool big_endian
>
4694 static unsigned char*
4695 restgpr1(unsigned char* p
, int r
)
4697 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4698 write_insn
<big_endian
>(p
, insn
);
4702 template<bool big_endian
>
4703 static unsigned char*
4704 restgpr1_tail(unsigned char* p
, int r
)
4706 p
= restgpr1
<big_endian
>(p
, r
);
4707 write_insn
<big_endian
>(p
, blr
);
4711 template<bool big_endian
>
4712 static unsigned char*
4713 savefpr(unsigned char* p
, int r
)
4715 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4716 write_insn
<big_endian
>(p
, insn
);
4720 template<bool big_endian
>
4721 static unsigned char*
4722 savefpr0_tail(unsigned char* p
, int r
)
4724 p
= savefpr
<big_endian
>(p
, r
);
4725 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4727 write_insn
<big_endian
>(p
, blr
);
4731 template<bool big_endian
>
4732 static unsigned char*
4733 restfpr(unsigned char* p
, int r
)
4735 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4736 write_insn
<big_endian
>(p
, insn
);
4740 template<bool big_endian
>
4741 static unsigned char*
4742 restfpr0_tail(unsigned char* p
, int r
)
4744 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4746 p
= restfpr
<big_endian
>(p
, r
);
4747 write_insn
<big_endian
>(p
, mtlr_0
);
4751 p
= restfpr
<big_endian
>(p
, 30);
4752 p
= restfpr
<big_endian
>(p
, 31);
4754 write_insn
<big_endian
>(p
, blr
);
4758 template<bool big_endian
>
4759 static unsigned char*
4760 savefpr1_tail(unsigned char* p
, int r
)
4762 p
= savefpr
<big_endian
>(p
, r
);
4763 write_insn
<big_endian
>(p
, blr
);
4767 template<bool big_endian
>
4768 static unsigned char*
4769 restfpr1_tail(unsigned char* p
, int r
)
4771 p
= restfpr
<big_endian
>(p
, r
);
4772 write_insn
<big_endian
>(p
, blr
);
4776 template<bool big_endian
>
4777 static unsigned char*
4778 savevr(unsigned char* p
, int r
)
4780 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4781 write_insn
<big_endian
>(p
, insn
);
4783 insn
= stvx_0_12_0
+ (r
<< 21);
4784 write_insn
<big_endian
>(p
, insn
);
4788 template<bool big_endian
>
4789 static unsigned char*
4790 savevr_tail(unsigned char* p
, int r
)
4792 p
= savevr
<big_endian
>(p
, r
);
4793 write_insn
<big_endian
>(p
, blr
);
4797 template<bool big_endian
>
4798 static unsigned char*
4799 restvr(unsigned char* p
, int r
)
4801 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4802 write_insn
<big_endian
>(p
, insn
);
4804 insn
= lvx_0_12_0
+ (r
<< 21);
4805 write_insn
<big_endian
>(p
, insn
);
4809 template<bool big_endian
>
4810 static unsigned char*
4811 restvr_tail(unsigned char* p
, int r
)
4813 p
= restvr
<big_endian
>(p
, r
);
4814 write_insn
<big_endian
>(p
, blr
);
4819 template<int size
, bool big_endian
>
4820 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
4821 Symbol_table
* symtab
)
4822 : Output_section_data_build(4),
4825 this->savres_define(symtab
,
4826 "_savegpr0_", 14, 31,
4827 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
4828 this->savres_define(symtab
,
4829 "_restgpr0_", 14, 29,
4830 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4831 this->savres_define(symtab
,
4832 "_restgpr0_", 30, 31,
4833 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4834 this->savres_define(symtab
,
4835 "_savegpr1_", 14, 31,
4836 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
4837 this->savres_define(symtab
,
4838 "_restgpr1_", 14, 31,
4839 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
4840 this->savres_define(symtab
,
4841 "_savefpr_", 14, 31,
4842 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
4843 this->savres_define(symtab
,
4844 "_restfpr_", 14, 29,
4845 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4846 this->savres_define(symtab
,
4847 "_restfpr_", 30, 31,
4848 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4849 this->savres_define(symtab
,
4851 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
4852 this->savres_define(symtab
,
4854 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
4855 this->savres_define(symtab
,
4857 savevr
<big_endian
>, savevr_tail
<big_endian
>);
4858 this->savres_define(symtab
,
4860 restvr
<big_endian
>, restvr_tail
<big_endian
>);
4863 template<int size
, bool big_endian
>
4865 Output_data_save_res
<size
, big_endian
>::savres_define(
4866 Symbol_table
* symtab
,
4868 unsigned int lo
, unsigned int hi
,
4869 unsigned char* write_ent(unsigned char*, int),
4870 unsigned char* write_tail(unsigned char*, int))
4872 size_t len
= strlen(name
);
4873 bool writing
= false;
4876 memcpy(sym
, name
, len
);
4879 for (unsigned int i
= lo
; i
<= hi
; i
++)
4881 sym
[len
+ 0] = i
/ 10 + '0';
4882 sym
[len
+ 1] = i
% 10 + '0';
4883 Symbol
* gsym
= symtab
->lookup(sym
);
4884 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
4885 writing
= writing
|| refd
;
4888 if (this->contents_
== NULL
)
4889 this->contents_
= new unsigned char[this->savres_max
];
4891 section_size_type value
= this->current_data_size();
4892 unsigned char* p
= this->contents_
+ value
;
4894 p
= write_ent(p
, i
);
4896 p
= write_tail(p
, i
);
4897 section_size_type cur_size
= p
- this->contents_
;
4898 this->set_current_data_size(cur_size
);
4900 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
4901 this, value
, cur_size
- value
,
4902 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
4903 elfcpp::STV_HIDDEN
, 0, false, false);
4908 // Write out save/restore.
4910 template<int size
, bool big_endian
>
4912 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4914 const section_size_type off
= this->offset();
4915 const section_size_type oview_size
=
4916 convert_to_section_size_type(this->data_size());
4917 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4918 memcpy(oview
, this->contents_
, oview_size
);
4919 of
->write_output_view(off
, oview_size
, oview
);
4923 // Create the glink section.
4925 template<int size
, bool big_endian
>
4927 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4929 if (this->glink_
== NULL
)
4931 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4932 this->glink_
->add_eh_frame(layout
);
4933 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4934 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4935 this->glink_
, ORDER_TEXT
, false);
4939 // Create a PLT entry for a global symbol.
4941 template<int size
, bool big_endian
>
4943 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4947 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4948 && gsym
->can_use_relative_reloc(false))
4950 if (this->iplt_
== NULL
)
4951 this->make_iplt_section(symtab
, layout
);
4952 this->iplt_
->add_ifunc_entry(gsym
);
4956 if (this->plt_
== NULL
)
4957 this->make_plt_section(symtab
, layout
);
4958 this->plt_
->add_entry(gsym
);
4962 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4964 template<int size
, bool big_endian
>
4966 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4967 Symbol_table
* symtab
,
4969 Sized_relobj_file
<size
, big_endian
>* relobj
,
4972 if (this->iplt_
== NULL
)
4973 this->make_iplt_section(symtab
, layout
);
4974 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4977 // Return the number of entries in the PLT.
4979 template<int size
, bool big_endian
>
4981 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4983 if (this->plt_
== NULL
)
4985 return this->plt_
->entry_count();
4988 // Create a GOT entry for local dynamic __tls_get_addr calls.
4990 template<int size
, bool big_endian
>
4992 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4993 Symbol_table
* symtab
,
4995 Sized_relobj_file
<size
, big_endian
>* object
)
4997 if (this->tlsld_got_offset_
== -1U)
4999 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5000 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5001 Output_data_got_powerpc
<size
, big_endian
>* got
5002 = this->got_section(symtab
, layout
);
5003 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5004 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5006 this->tlsld_got_offset_
= got_offset
;
5008 return this->tlsld_got_offset_
;
5011 // Get the Reference_flags for a particular relocation.
5013 template<int size
, bool big_endian
>
5015 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5016 unsigned int r_type
,
5017 const Target_powerpc
* target
)
5023 case elfcpp::R_POWERPC_NONE
:
5024 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5025 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5026 case elfcpp::R_PPC64_TOC
:
5027 // No symbol reference.
5030 case elfcpp::R_PPC64_ADDR64
:
5031 case elfcpp::R_PPC64_UADDR64
:
5032 case elfcpp::R_POWERPC_ADDR32
:
5033 case elfcpp::R_POWERPC_UADDR32
:
5034 case elfcpp::R_POWERPC_ADDR16
:
5035 case elfcpp::R_POWERPC_UADDR16
:
5036 case elfcpp::R_POWERPC_ADDR16_LO
:
5037 case elfcpp::R_POWERPC_ADDR16_HI
:
5038 case elfcpp::R_POWERPC_ADDR16_HA
:
5039 ref
= Symbol::ABSOLUTE_REF
;
5042 case elfcpp::R_POWERPC_ADDR24
:
5043 case elfcpp::R_POWERPC_ADDR14
:
5044 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5045 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5046 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5049 case elfcpp::R_PPC64_REL64
:
5050 case elfcpp::R_POWERPC_REL32
:
5051 case elfcpp::R_PPC_LOCAL24PC
:
5052 case elfcpp::R_POWERPC_REL16
:
5053 case elfcpp::R_POWERPC_REL16_LO
:
5054 case elfcpp::R_POWERPC_REL16_HI
:
5055 case elfcpp::R_POWERPC_REL16_HA
:
5056 ref
= Symbol::RELATIVE_REF
;
5059 case elfcpp::R_POWERPC_REL24
:
5060 case elfcpp::R_PPC_PLTREL24
:
5061 case elfcpp::R_POWERPC_REL14
:
5062 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5063 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5064 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5067 case elfcpp::R_POWERPC_GOT16
:
5068 case elfcpp::R_POWERPC_GOT16_LO
:
5069 case elfcpp::R_POWERPC_GOT16_HI
:
5070 case elfcpp::R_POWERPC_GOT16_HA
:
5071 case elfcpp::R_PPC64_GOT16_DS
:
5072 case elfcpp::R_PPC64_GOT16_LO_DS
:
5073 case elfcpp::R_PPC64_TOC16
:
5074 case elfcpp::R_PPC64_TOC16_LO
:
5075 case elfcpp::R_PPC64_TOC16_HI
:
5076 case elfcpp::R_PPC64_TOC16_HA
:
5077 case elfcpp::R_PPC64_TOC16_DS
:
5078 case elfcpp::R_PPC64_TOC16_LO_DS
:
5080 ref
= Symbol::ABSOLUTE_REF
;
5083 case elfcpp::R_POWERPC_GOT_TPREL16
:
5084 case elfcpp::R_POWERPC_TLS
:
5085 ref
= Symbol::TLS_REF
;
5088 case elfcpp::R_POWERPC_COPY
:
5089 case elfcpp::R_POWERPC_GLOB_DAT
:
5090 case elfcpp::R_POWERPC_JMP_SLOT
:
5091 case elfcpp::R_POWERPC_RELATIVE
:
5092 case elfcpp::R_POWERPC_DTPMOD
:
5094 // Not expected. We will give an error later.
5098 if (size
== 64 && target
->abiversion() < 2)
5099 ref
|= Symbol::FUNC_DESC_ABI
;
5103 // Report an unsupported relocation against a local symbol.
5105 template<int size
, bool big_endian
>
5107 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5108 Sized_relobj_file
<size
, big_endian
>* object
,
5109 unsigned int r_type
)
5111 gold_error(_("%s: unsupported reloc %u against local symbol"),
5112 object
->name().c_str(), r_type
);
5115 // We are about to emit a dynamic relocation of type R_TYPE. If the
5116 // dynamic linker does not support it, issue an error.
5118 template<int size
, bool big_endian
>
5120 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5121 unsigned int r_type
)
5123 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5125 // These are the relocation types supported by glibc for both 32-bit
5126 // and 64-bit powerpc.
5129 case elfcpp::R_POWERPC_NONE
:
5130 case elfcpp::R_POWERPC_RELATIVE
:
5131 case elfcpp::R_POWERPC_GLOB_DAT
:
5132 case elfcpp::R_POWERPC_DTPMOD
:
5133 case elfcpp::R_POWERPC_DTPREL
:
5134 case elfcpp::R_POWERPC_TPREL
:
5135 case elfcpp::R_POWERPC_JMP_SLOT
:
5136 case elfcpp::R_POWERPC_COPY
:
5137 case elfcpp::R_POWERPC_IRELATIVE
:
5138 case elfcpp::R_POWERPC_ADDR32
:
5139 case elfcpp::R_POWERPC_UADDR32
:
5140 case elfcpp::R_POWERPC_ADDR24
:
5141 case elfcpp::R_POWERPC_ADDR16
:
5142 case elfcpp::R_POWERPC_UADDR16
:
5143 case elfcpp::R_POWERPC_ADDR16_LO
:
5144 case elfcpp::R_POWERPC_ADDR16_HI
:
5145 case elfcpp::R_POWERPC_ADDR16_HA
:
5146 case elfcpp::R_POWERPC_ADDR14
:
5147 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5148 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5149 case elfcpp::R_POWERPC_REL32
:
5150 case elfcpp::R_POWERPC_REL24
:
5151 case elfcpp::R_POWERPC_TPREL16
:
5152 case elfcpp::R_POWERPC_TPREL16_LO
:
5153 case elfcpp::R_POWERPC_TPREL16_HI
:
5154 case elfcpp::R_POWERPC_TPREL16_HA
:
5165 // These are the relocation types supported only on 64-bit.
5166 case elfcpp::R_PPC64_ADDR64
:
5167 case elfcpp::R_PPC64_UADDR64
:
5168 case elfcpp::R_PPC64_JMP_IREL
:
5169 case elfcpp::R_PPC64_ADDR16_DS
:
5170 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5171 case elfcpp::R_PPC64_ADDR16_HIGH
:
5172 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5173 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5174 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5175 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5176 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5177 case elfcpp::R_PPC64_REL64
:
5178 case elfcpp::R_POWERPC_ADDR30
:
5179 case elfcpp::R_PPC64_TPREL16_DS
:
5180 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5181 case elfcpp::R_PPC64_TPREL16_HIGH
:
5182 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5183 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5184 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5185 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5186 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5197 // These are the relocation types supported only on 32-bit.
5198 // ??? glibc ld.so doesn't need to support these.
5199 case elfcpp::R_POWERPC_DTPREL16
:
5200 case elfcpp::R_POWERPC_DTPREL16_LO
:
5201 case elfcpp::R_POWERPC_DTPREL16_HI
:
5202 case elfcpp::R_POWERPC_DTPREL16_HA
:
5210 // This prevents us from issuing more than one error per reloc
5211 // section. But we can still wind up issuing more than one
5212 // error per object file.
5213 if (this->issued_non_pic_error_
)
5215 gold_assert(parameters
->options().output_is_position_independent());
5216 object
->error(_("requires unsupported dynamic reloc; "
5217 "recompile with -fPIC"));
5218 this->issued_non_pic_error_
= true;
5222 // Return whether we need to make a PLT entry for a relocation of the
5223 // given type against a STT_GNU_IFUNC symbol.
5225 template<int size
, bool big_endian
>
5227 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5228 Target_powerpc
<size
, big_endian
>* target
,
5229 Sized_relobj_file
<size
, big_endian
>* object
,
5230 unsigned int r_type
,
5233 // In non-pic code any reference will resolve to the plt call stub
5234 // for the ifunc symbol.
5235 if ((size
== 32 || target
->abiversion() >= 2)
5236 && !parameters
->options().output_is_position_independent())
5241 // Word size refs from data sections are OK, but don't need a PLT entry.
5242 case elfcpp::R_POWERPC_ADDR32
:
5243 case elfcpp::R_POWERPC_UADDR32
:
5248 case elfcpp::R_PPC64_ADDR64
:
5249 case elfcpp::R_PPC64_UADDR64
:
5254 // GOT refs are good, but also don't need a PLT entry.
5255 case elfcpp::R_POWERPC_GOT16
:
5256 case elfcpp::R_POWERPC_GOT16_LO
:
5257 case elfcpp::R_POWERPC_GOT16_HI
:
5258 case elfcpp::R_POWERPC_GOT16_HA
:
5259 case elfcpp::R_PPC64_GOT16_DS
:
5260 case elfcpp::R_PPC64_GOT16_LO_DS
:
5263 // Function calls are good, and these do need a PLT entry.
5264 case elfcpp::R_POWERPC_ADDR24
:
5265 case elfcpp::R_POWERPC_ADDR14
:
5266 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5267 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5268 case elfcpp::R_POWERPC_REL24
:
5269 case elfcpp::R_PPC_PLTREL24
:
5270 case elfcpp::R_POWERPC_REL14
:
5271 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5272 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5279 // Anything else is a problem.
5280 // If we are building a static executable, the libc startup function
5281 // responsible for applying indirect function relocations is going
5282 // to complain about the reloc type.
5283 // If we are building a dynamic executable, we will have a text
5284 // relocation. The dynamic loader will set the text segment
5285 // writable and non-executable to apply text relocations. So we'll
5286 // segfault when trying to run the indirection function to resolve
5289 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5290 object
->name().c_str(), r_type
);
5294 // Scan a relocation for a local symbol.
5296 template<int size
, bool big_endian
>
5298 Target_powerpc
<size
, big_endian
>::Scan::local(
5299 Symbol_table
* symtab
,
5301 Target_powerpc
<size
, big_endian
>* target
,
5302 Sized_relobj_file
<size
, big_endian
>* object
,
5303 unsigned int data_shndx
,
5304 Output_section
* output_section
,
5305 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5306 unsigned int r_type
,
5307 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5310 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5312 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5313 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5315 this->expect_tls_get_addr_call();
5316 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5317 if (tls_type
!= tls::TLSOPT_NONE
)
5318 this->skip_next_tls_get_addr_call();
5320 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5321 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5323 this->expect_tls_get_addr_call();
5324 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5325 if (tls_type
!= tls::TLSOPT_NONE
)
5326 this->skip_next_tls_get_addr_call();
5329 Powerpc_relobj
<size
, big_endian
>* ppc_object
5330 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5335 && data_shndx
== ppc_object
->opd_shndx()
5336 && r_type
== elfcpp::R_PPC64_ADDR64
)
5337 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5341 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5342 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5343 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5345 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5346 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5347 r_type
, r_sym
, reloc
.get_r_addend());
5348 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5353 case elfcpp::R_POWERPC_NONE
:
5354 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5355 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5356 case elfcpp::R_PPC64_TOCSAVE
:
5357 case elfcpp::R_POWERPC_TLS
:
5360 case elfcpp::R_PPC64_TOC
:
5362 Output_data_got_powerpc
<size
, big_endian
>* got
5363 = target
->got_section(symtab
, layout
);
5364 if (parameters
->options().output_is_position_independent())
5366 Address off
= reloc
.get_r_offset();
5368 && target
->abiversion() < 2
5369 && data_shndx
== ppc_object
->opd_shndx()
5370 && ppc_object
->get_opd_discard(off
- 8))
5373 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5374 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5375 rela_dyn
->add_output_section_relative(got
->output_section(),
5376 elfcpp::R_POWERPC_RELATIVE
,
5378 object
, data_shndx
, off
,
5379 symobj
->toc_base_offset());
5384 case elfcpp::R_PPC64_ADDR64
:
5385 case elfcpp::R_PPC64_UADDR64
:
5386 case elfcpp::R_POWERPC_ADDR32
:
5387 case elfcpp::R_POWERPC_UADDR32
:
5388 case elfcpp::R_POWERPC_ADDR24
:
5389 case elfcpp::R_POWERPC_ADDR16
:
5390 case elfcpp::R_POWERPC_ADDR16_LO
:
5391 case elfcpp::R_POWERPC_ADDR16_HI
:
5392 case elfcpp::R_POWERPC_ADDR16_HA
:
5393 case elfcpp::R_POWERPC_UADDR16
:
5394 case elfcpp::R_PPC64_ADDR16_HIGH
:
5395 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5396 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5397 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5398 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5399 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5400 case elfcpp::R_PPC64_ADDR16_DS
:
5401 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5402 case elfcpp::R_POWERPC_ADDR14
:
5403 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5404 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5405 // If building a shared library (or a position-independent
5406 // executable), we need to create a dynamic relocation for
5408 if (parameters
->options().output_is_position_independent()
5409 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5411 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5413 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5414 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5416 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5417 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5418 : elfcpp::R_POWERPC_RELATIVE
);
5419 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5420 output_section
, data_shndx
,
5421 reloc
.get_r_offset(),
5422 reloc
.get_r_addend(), false);
5426 check_non_pic(object
, r_type
);
5427 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5428 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5429 data_shndx
, reloc
.get_r_offset(),
5430 reloc
.get_r_addend());
5435 case elfcpp::R_POWERPC_REL24
:
5436 case elfcpp::R_PPC_PLTREL24
:
5437 case elfcpp::R_PPC_LOCAL24PC
:
5438 case elfcpp::R_POWERPC_REL14
:
5439 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5440 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5442 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5443 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5444 reloc
.get_r_addend());
5447 case elfcpp::R_PPC64_REL64
:
5448 case elfcpp::R_POWERPC_REL32
:
5449 case elfcpp::R_POWERPC_REL16
:
5450 case elfcpp::R_POWERPC_REL16_LO
:
5451 case elfcpp::R_POWERPC_REL16_HI
:
5452 case elfcpp::R_POWERPC_REL16_HA
:
5453 case elfcpp::R_POWERPC_SECTOFF
:
5454 case elfcpp::R_POWERPC_SECTOFF_LO
:
5455 case elfcpp::R_POWERPC_SECTOFF_HI
:
5456 case elfcpp::R_POWERPC_SECTOFF_HA
:
5457 case elfcpp::R_PPC64_SECTOFF_DS
:
5458 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5459 case elfcpp::R_POWERPC_TPREL16
:
5460 case elfcpp::R_POWERPC_TPREL16_LO
:
5461 case elfcpp::R_POWERPC_TPREL16_HI
:
5462 case elfcpp::R_POWERPC_TPREL16_HA
:
5463 case elfcpp::R_PPC64_TPREL16_DS
:
5464 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5465 case elfcpp::R_PPC64_TPREL16_HIGH
:
5466 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5467 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5468 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5469 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5470 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5471 case elfcpp::R_POWERPC_DTPREL16
:
5472 case elfcpp::R_POWERPC_DTPREL16_LO
:
5473 case elfcpp::R_POWERPC_DTPREL16_HI
:
5474 case elfcpp::R_POWERPC_DTPREL16_HA
:
5475 case elfcpp::R_PPC64_DTPREL16_DS
:
5476 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5477 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5478 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5479 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5480 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5481 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5482 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5483 case elfcpp::R_PPC64_TLSGD
:
5484 case elfcpp::R_PPC64_TLSLD
:
5485 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5488 case elfcpp::R_POWERPC_GOT16
:
5489 case elfcpp::R_POWERPC_GOT16_LO
:
5490 case elfcpp::R_POWERPC_GOT16_HI
:
5491 case elfcpp::R_POWERPC_GOT16_HA
:
5492 case elfcpp::R_PPC64_GOT16_DS
:
5493 case elfcpp::R_PPC64_GOT16_LO_DS
:
5495 // The symbol requires a GOT entry.
5496 Output_data_got_powerpc
<size
, big_endian
>* got
5497 = target
->got_section(symtab
, layout
);
5498 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5500 if (!parameters
->options().output_is_position_independent())
5502 if ((size
== 32 && is_ifunc
)
5503 || (size
== 64 && target
->abiversion() >= 2))
5504 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5506 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5508 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5510 // If we are generating a shared object or a pie, this
5511 // symbol's GOT entry will be set by a dynamic relocation.
5513 off
= got
->add_constant(0);
5514 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5516 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5518 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5519 : elfcpp::R_POWERPC_RELATIVE
);
5520 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5521 got
, off
, 0, false);
5526 case elfcpp::R_PPC64_TOC16
:
5527 case elfcpp::R_PPC64_TOC16_LO
:
5528 case elfcpp::R_PPC64_TOC16_HI
:
5529 case elfcpp::R_PPC64_TOC16_HA
:
5530 case elfcpp::R_PPC64_TOC16_DS
:
5531 case elfcpp::R_PPC64_TOC16_LO_DS
:
5532 // We need a GOT section.
5533 target
->got_section(symtab
, layout
);
5536 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5537 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5538 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5539 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5541 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5542 if (tls_type
== tls::TLSOPT_NONE
)
5544 Output_data_got_powerpc
<size
, big_endian
>* got
5545 = target
->got_section(symtab
, layout
);
5546 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5547 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5548 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5549 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5551 else if (tls_type
== tls::TLSOPT_TO_LE
)
5553 // no GOT relocs needed for Local Exec.
5560 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5561 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5562 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5563 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5565 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5566 if (tls_type
== tls::TLSOPT_NONE
)
5567 target
->tlsld_got_offset(symtab
, layout
, object
);
5568 else if (tls_type
== tls::TLSOPT_TO_LE
)
5570 // no GOT relocs needed for Local Exec.
5571 if (parameters
->options().emit_relocs())
5573 Output_section
* os
= layout
->tls_segment()->first_section();
5574 gold_assert(os
!= NULL
);
5575 os
->set_needs_symtab_index();
5583 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5584 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5585 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5586 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5588 Output_data_got_powerpc
<size
, big_endian
>* got
5589 = target
->got_section(symtab
, layout
);
5590 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5591 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5595 case elfcpp::R_POWERPC_GOT_TPREL16
:
5596 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5597 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5598 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5600 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5601 if (tls_type
== tls::TLSOPT_NONE
)
5603 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5604 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5606 Output_data_got_powerpc
<size
, big_endian
>* got
5607 = target
->got_section(symtab
, layout
);
5608 unsigned int off
= got
->add_constant(0);
5609 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5611 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5612 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5613 elfcpp::R_POWERPC_TPREL
,
5617 else if (tls_type
== tls::TLSOPT_TO_LE
)
5619 // no GOT relocs needed for Local Exec.
5627 unsupported_reloc_local(object
, r_type
);
5633 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5634 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5635 case elfcpp::R_POWERPC_GOT_TPREL16
:
5636 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5637 case elfcpp::R_POWERPC_GOT16
:
5638 case elfcpp::R_PPC64_GOT16_DS
:
5639 case elfcpp::R_PPC64_TOC16
:
5640 case elfcpp::R_PPC64_TOC16_DS
:
5641 ppc_object
->set_has_small_toc_reloc();
5647 // Report an unsupported relocation against a global symbol.
5649 template<int size
, bool big_endian
>
5651 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5652 Sized_relobj_file
<size
, big_endian
>* object
,
5653 unsigned int r_type
,
5656 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5657 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5660 // Scan a relocation for a global symbol.
5662 template<int size
, bool big_endian
>
5664 Target_powerpc
<size
, big_endian
>::Scan::global(
5665 Symbol_table
* symtab
,
5667 Target_powerpc
<size
, big_endian
>* target
,
5668 Sized_relobj_file
<size
, big_endian
>* object
,
5669 unsigned int data_shndx
,
5670 Output_section
* output_section
,
5671 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5672 unsigned int r_type
,
5675 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5678 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5679 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5681 this->expect_tls_get_addr_call();
5682 const bool final
= gsym
->final_value_is_known();
5683 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5684 if (tls_type
!= tls::TLSOPT_NONE
)
5685 this->skip_next_tls_get_addr_call();
5687 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5688 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5690 this->expect_tls_get_addr_call();
5691 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5692 if (tls_type
!= tls::TLSOPT_NONE
)
5693 this->skip_next_tls_get_addr_call();
5696 Powerpc_relobj
<size
, big_endian
>* ppc_object
5697 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5699 // A STT_GNU_IFUNC symbol may require a PLT entry.
5700 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5701 bool pushed_ifunc
= false;
5702 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5704 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5705 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5706 reloc
.get_r_addend());
5707 target
->make_plt_entry(symtab
, layout
, gsym
);
5708 pushed_ifunc
= true;
5713 case elfcpp::R_POWERPC_NONE
:
5714 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5715 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5716 case elfcpp::R_PPC_LOCAL24PC
:
5717 case elfcpp::R_POWERPC_TLS
:
5720 case elfcpp::R_PPC64_TOC
:
5722 Output_data_got_powerpc
<size
, big_endian
>* got
5723 = target
->got_section(symtab
, layout
);
5724 if (parameters
->options().output_is_position_independent())
5726 Address off
= reloc
.get_r_offset();
5728 && data_shndx
== ppc_object
->opd_shndx()
5729 && ppc_object
->get_opd_discard(off
- 8))
5732 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5733 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5734 if (data_shndx
!= ppc_object
->opd_shndx())
5735 symobj
= static_cast
5736 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5737 rela_dyn
->add_output_section_relative(got
->output_section(),
5738 elfcpp::R_POWERPC_RELATIVE
,
5740 object
, data_shndx
, off
,
5741 symobj
->toc_base_offset());
5746 case elfcpp::R_PPC64_ADDR64
:
5748 && target
->abiversion() < 2
5749 && data_shndx
== ppc_object
->opd_shndx()
5750 && (gsym
->is_defined_in_discarded_section()
5751 || gsym
->object() != object
))
5753 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5757 case elfcpp::R_PPC64_UADDR64
:
5758 case elfcpp::R_POWERPC_ADDR32
:
5759 case elfcpp::R_POWERPC_UADDR32
:
5760 case elfcpp::R_POWERPC_ADDR24
:
5761 case elfcpp::R_POWERPC_ADDR16
:
5762 case elfcpp::R_POWERPC_ADDR16_LO
:
5763 case elfcpp::R_POWERPC_ADDR16_HI
:
5764 case elfcpp::R_POWERPC_ADDR16_HA
:
5765 case elfcpp::R_POWERPC_UADDR16
:
5766 case elfcpp::R_PPC64_ADDR16_HIGH
:
5767 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5768 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5769 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5770 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5771 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5772 case elfcpp::R_PPC64_ADDR16_DS
:
5773 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5774 case elfcpp::R_POWERPC_ADDR14
:
5775 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5776 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5778 // Make a PLT entry if necessary.
5779 if (gsym
->needs_plt_entry())
5781 // Since this is not a PC-relative relocation, we may be
5782 // taking the address of a function. In that case we need to
5783 // set the entry in the dynamic symbol table to the address of
5784 // the PLT call stub.
5785 bool need_ifunc_plt
= false;
5786 if ((size
== 32 || target
->abiversion() >= 2)
5787 && gsym
->is_from_dynobj()
5788 && !parameters
->options().output_is_position_independent())
5790 gsym
->set_needs_dynsym_value();
5791 need_ifunc_plt
= true;
5793 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
5795 target
->push_branch(ppc_object
, data_shndx
,
5796 reloc
.get_r_offset(), r_type
,
5797 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5798 reloc
.get_r_addend());
5799 target
->make_plt_entry(symtab
, layout
, gsym
);
5802 // Make a dynamic relocation if necessary.
5803 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
5804 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5806 if (gsym
->may_need_copy_reloc())
5808 target
->copy_reloc(symtab
, layout
, object
,
5809 data_shndx
, output_section
, gsym
, reloc
);
5811 else if ((((size
== 32
5812 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5814 && r_type
== elfcpp::R_PPC64_ADDR64
5815 && target
->abiversion() >= 2))
5816 && gsym
->can_use_relative_reloc(false)
5817 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
5818 && parameters
->options().shared()))
5820 && r_type
== elfcpp::R_PPC64_ADDR64
5821 && target
->abiversion() < 2
5822 && (gsym
->can_use_relative_reloc(false)
5823 || data_shndx
== ppc_object
->opd_shndx())))
5825 Reloc_section
* rela_dyn
5826 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5827 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5828 : elfcpp::R_POWERPC_RELATIVE
);
5829 rela_dyn
->add_symbolless_global_addend(
5830 gsym
, dynrel
, output_section
, object
, data_shndx
,
5831 reloc
.get_r_offset(), reloc
.get_r_addend());
5835 Reloc_section
* rela_dyn
5836 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5837 check_non_pic(object
, r_type
);
5838 rela_dyn
->add_global(gsym
, r_type
, output_section
,
5840 reloc
.get_r_offset(),
5841 reloc
.get_r_addend());
5847 case elfcpp::R_PPC_PLTREL24
:
5848 case elfcpp::R_POWERPC_REL24
:
5851 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5853 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5854 reloc
.get_r_addend());
5855 if (gsym
->needs_plt_entry()
5856 || (!gsym
->final_value_is_known()
5857 && (gsym
->is_undefined()
5858 || gsym
->is_from_dynobj()
5859 || gsym
->is_preemptible())))
5860 target
->make_plt_entry(symtab
, layout
, gsym
);
5864 case elfcpp::R_PPC64_REL64
:
5865 case elfcpp::R_POWERPC_REL32
:
5866 // Make a dynamic relocation if necessary.
5867 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
5869 if (gsym
->may_need_copy_reloc())
5871 target
->copy_reloc(symtab
, layout
, object
,
5872 data_shndx
, output_section
, gsym
,
5877 Reloc_section
* rela_dyn
5878 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5879 check_non_pic(object
, r_type
);
5880 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
5881 data_shndx
, reloc
.get_r_offset(),
5882 reloc
.get_r_addend());
5887 case elfcpp::R_POWERPC_REL14
:
5888 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5889 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5891 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5892 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5893 reloc
.get_r_addend());
5896 case elfcpp::R_POWERPC_REL16
:
5897 case elfcpp::R_POWERPC_REL16_LO
:
5898 case elfcpp::R_POWERPC_REL16_HI
:
5899 case elfcpp::R_POWERPC_REL16_HA
:
5900 case elfcpp::R_POWERPC_SECTOFF
:
5901 case elfcpp::R_POWERPC_SECTOFF_LO
:
5902 case elfcpp::R_POWERPC_SECTOFF_HI
:
5903 case elfcpp::R_POWERPC_SECTOFF_HA
:
5904 case elfcpp::R_PPC64_SECTOFF_DS
:
5905 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5906 case elfcpp::R_POWERPC_TPREL16
:
5907 case elfcpp::R_POWERPC_TPREL16_LO
:
5908 case elfcpp::R_POWERPC_TPREL16_HI
:
5909 case elfcpp::R_POWERPC_TPREL16_HA
:
5910 case elfcpp::R_PPC64_TPREL16_DS
:
5911 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5912 case elfcpp::R_PPC64_TPREL16_HIGH
:
5913 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5914 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5915 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5916 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5917 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5918 case elfcpp::R_POWERPC_DTPREL16
:
5919 case elfcpp::R_POWERPC_DTPREL16_LO
:
5920 case elfcpp::R_POWERPC_DTPREL16_HI
:
5921 case elfcpp::R_POWERPC_DTPREL16_HA
:
5922 case elfcpp::R_PPC64_DTPREL16_DS
:
5923 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5924 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5925 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5926 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5927 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5928 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5929 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5930 case elfcpp::R_PPC64_TLSGD
:
5931 case elfcpp::R_PPC64_TLSLD
:
5932 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5935 case elfcpp::R_POWERPC_GOT16
:
5936 case elfcpp::R_POWERPC_GOT16_LO
:
5937 case elfcpp::R_POWERPC_GOT16_HI
:
5938 case elfcpp::R_POWERPC_GOT16_HA
:
5939 case elfcpp::R_PPC64_GOT16_DS
:
5940 case elfcpp::R_PPC64_GOT16_LO_DS
:
5942 // The symbol requires a GOT entry.
5943 Output_data_got_powerpc
<size
, big_endian
>* got
;
5945 got
= target
->got_section(symtab
, layout
);
5946 if (gsym
->final_value_is_known())
5948 if ((size
== 32 && is_ifunc
)
5949 || (size
== 64 && target
->abiversion() >= 2))
5950 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
5952 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
5954 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
5956 // If we are generating a shared object or a pie, this
5957 // symbol's GOT entry will be set by a dynamic relocation.
5958 unsigned int off
= got
->add_constant(0);
5959 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
5961 Reloc_section
* rela_dyn
5962 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5964 if (gsym
->can_use_relative_reloc(false)
5966 || target
->abiversion() >= 2)
5967 && gsym
->visibility() == elfcpp::STV_PROTECTED
5968 && parameters
->options().shared()))
5970 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5971 : elfcpp::R_POWERPC_RELATIVE
);
5972 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5976 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5977 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5983 case elfcpp::R_PPC64_TOC16
:
5984 case elfcpp::R_PPC64_TOC16_LO
:
5985 case elfcpp::R_PPC64_TOC16_HI
:
5986 case elfcpp::R_PPC64_TOC16_HA
:
5987 case elfcpp::R_PPC64_TOC16_DS
:
5988 case elfcpp::R_PPC64_TOC16_LO_DS
:
5989 // We need a GOT section.
5990 target
->got_section(symtab
, layout
);
5993 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5994 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5995 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5996 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5998 const bool final
= gsym
->final_value_is_known();
5999 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6000 if (tls_type
== tls::TLSOPT_NONE
)
6002 Output_data_got_powerpc
<size
, big_endian
>* got
6003 = target
->got_section(symtab
, layout
);
6004 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6005 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6006 elfcpp::R_POWERPC_DTPMOD
,
6007 elfcpp::R_POWERPC_DTPREL
);
6009 else if (tls_type
== tls::TLSOPT_TO_IE
)
6011 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6013 Output_data_got_powerpc
<size
, big_endian
>* got
6014 = target
->got_section(symtab
, layout
);
6015 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6016 if (gsym
->is_undefined()
6017 || gsym
->is_from_dynobj())
6019 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6020 elfcpp::R_POWERPC_TPREL
);
6024 unsigned int off
= got
->add_constant(0);
6025 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6026 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6027 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6032 else if (tls_type
== tls::TLSOPT_TO_LE
)
6034 // no GOT relocs needed for Local Exec.
6041 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6042 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6043 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6044 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6046 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6047 if (tls_type
== tls::TLSOPT_NONE
)
6048 target
->tlsld_got_offset(symtab
, layout
, object
);
6049 else if (tls_type
== tls::TLSOPT_TO_LE
)
6051 // no GOT relocs needed for Local Exec.
6052 if (parameters
->options().emit_relocs())
6054 Output_section
* os
= layout
->tls_segment()->first_section();
6055 gold_assert(os
!= NULL
);
6056 os
->set_needs_symtab_index();
6064 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6065 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6066 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6067 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6069 Output_data_got_powerpc
<size
, big_endian
>* got
6070 = target
->got_section(symtab
, layout
);
6071 if (!gsym
->final_value_is_known()
6072 && (gsym
->is_from_dynobj()
6073 || gsym
->is_undefined()
6074 || gsym
->is_preemptible()))
6075 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6076 target
->rela_dyn_section(layout
),
6077 elfcpp::R_POWERPC_DTPREL
);
6079 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6083 case elfcpp::R_POWERPC_GOT_TPREL16
:
6084 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6085 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6086 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6088 const bool final
= gsym
->final_value_is_known();
6089 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6090 if (tls_type
== tls::TLSOPT_NONE
)
6092 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6094 Output_data_got_powerpc
<size
, big_endian
>* got
6095 = target
->got_section(symtab
, layout
);
6096 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6097 if (gsym
->is_undefined()
6098 || gsym
->is_from_dynobj())
6100 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6101 elfcpp::R_POWERPC_TPREL
);
6105 unsigned int off
= got
->add_constant(0);
6106 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6107 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6108 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6113 else if (tls_type
== tls::TLSOPT_TO_LE
)
6115 // no GOT relocs needed for Local Exec.
6123 unsupported_reloc_global(object
, r_type
, gsym
);
6129 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6130 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6131 case elfcpp::R_POWERPC_GOT_TPREL16
:
6132 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6133 case elfcpp::R_POWERPC_GOT16
:
6134 case elfcpp::R_PPC64_GOT16_DS
:
6135 case elfcpp::R_PPC64_TOC16
:
6136 case elfcpp::R_PPC64_TOC16_DS
:
6137 ppc_object
->set_has_small_toc_reloc();
6143 // Process relocations for gc.
6145 template<int size
, bool big_endian
>
6147 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6148 Symbol_table
* symtab
,
6150 Sized_relobj_file
<size
, big_endian
>* object
,
6151 unsigned int data_shndx
,
6153 const unsigned char* prelocs
,
6155 Output_section
* output_section
,
6156 bool needs_special_offset_handling
,
6157 size_t local_symbol_count
,
6158 const unsigned char* plocal_symbols
)
6160 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6161 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6162 Powerpc_relobj
<size
, big_endian
>* ppc_object
6163 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6165 ppc_object
->set_opd_valid();
6166 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6168 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6169 for (p
= ppc_object
->access_from_map()->begin();
6170 p
!= ppc_object
->access_from_map()->end();
6173 Address dst_off
= p
->first
;
6174 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6175 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6176 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6178 Object
* src_obj
= s
->first
;
6179 unsigned int src_indx
= s
->second
;
6180 symtab
->gc()->add_reference(src_obj
, src_indx
,
6181 ppc_object
, dst_indx
);
6185 ppc_object
->access_from_map()->clear();
6186 ppc_object
->process_gc_mark(symtab
);
6187 // Don't look at .opd relocs as .opd will reference everything.
6191 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
6192 typename
Target_powerpc::Relocatable_size_for_reloc
>(
6201 needs_special_offset_handling
,
6206 // Handle target specific gc actions when adding a gc reference from
6207 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6208 // and DST_OFF. For powerpc64, this adds a referenc to the code
6209 // section of a function descriptor.
6211 template<int size
, bool big_endian
>
6213 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6214 Symbol_table
* symtab
,
6216 unsigned int src_shndx
,
6218 unsigned int dst_shndx
,
6219 Address dst_off
) const
6221 if (size
!= 64 || dst_obj
->is_dynamic())
6224 Powerpc_relobj
<size
, big_endian
>* ppc_object
6225 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6226 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6228 if (ppc_object
->opd_valid())
6230 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6231 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6235 // If we haven't run scan_opd_relocs, we must delay
6236 // processing this function descriptor reference.
6237 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6242 // Add any special sections for this symbol to the gc work list.
6243 // For powerpc64, this adds the code section of a function
6246 template<int size
, bool big_endian
>
6248 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6249 Symbol_table
* symtab
,
6254 Powerpc_relobj
<size
, big_endian
>* ppc_object
6255 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6257 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6258 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6260 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6261 Address dst_off
= gsym
->value();
6262 if (ppc_object
->opd_valid())
6264 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6265 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
6268 ppc_object
->add_gc_mark(dst_off
);
6273 // For a symbol location in .opd, set LOC to the location of the
6276 template<int size
, bool big_endian
>
6278 Target_powerpc
<size
, big_endian
>::do_function_location(
6279 Symbol_location
* loc
) const
6281 if (size
== 64 && loc
->shndx
!= 0)
6283 if (loc
->object
->is_dynamic())
6285 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6286 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6287 if (loc
->shndx
== ppc_object
->opd_shndx())
6290 Address off
= loc
->offset
- ppc_object
->opd_address();
6291 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6292 loc
->offset
= dest_off
;
6297 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6298 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6299 if (loc
->shndx
== ppc_object
->opd_shndx())
6302 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6303 loc
->offset
= dest_off
;
6309 // Scan relocations for a section.
6311 template<int size
, bool big_endian
>
6313 Target_powerpc
<size
, big_endian
>::scan_relocs(
6314 Symbol_table
* symtab
,
6316 Sized_relobj_file
<size
, big_endian
>* object
,
6317 unsigned int data_shndx
,
6318 unsigned int sh_type
,
6319 const unsigned char* prelocs
,
6321 Output_section
* output_section
,
6322 bool needs_special_offset_handling
,
6323 size_t local_symbol_count
,
6324 const unsigned char* plocal_symbols
)
6326 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6327 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6329 if (sh_type
== elfcpp::SHT_REL
)
6331 gold_error(_("%s: unsupported REL reloc section"),
6332 object
->name().c_str());
6336 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
6345 needs_special_offset_handling
,
6350 // Functor class for processing the global symbol table.
6351 // Removes symbols defined on discarded opd entries.
6353 template<bool big_endian
>
6354 class Global_symbol_visitor_opd
6357 Global_symbol_visitor_opd()
6361 operator()(Sized_symbol
<64>* sym
)
6363 if (sym
->has_symtab_index()
6364 || sym
->source() != Symbol::FROM_OBJECT
6365 || !sym
->in_real_elf())
6368 if (sym
->object()->is_dynamic())
6371 Powerpc_relobj
<64, big_endian
>* symobj
6372 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6373 if (symobj
->opd_shndx() == 0)
6377 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6378 if (shndx
== symobj
->opd_shndx()
6379 && symobj
->get_opd_discard(sym
->value()))
6380 sym
->set_symtab_index(-1U);
6384 template<int size
, bool big_endian
>
6386 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6388 Symbol_table
* symtab
)
6392 Output_data_save_res
<64, big_endian
>* savres
6393 = new Output_data_save_res
<64, big_endian
>(symtab
);
6394 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6395 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6396 savres
, ORDER_TEXT
, false);
6400 // Sort linker created .got section first (for the header), then input
6401 // sections belonging to files using small model code.
6403 template<bool big_endian
>
6404 class Sort_toc_sections
6408 operator()(const Output_section::Input_section
& is1
,
6409 const Output_section::Input_section
& is2
) const
6411 if (!is1
.is_input_section() && is2
.is_input_section())
6414 = (is1
.is_input_section()
6415 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6416 ->has_small_toc_reloc()));
6418 = (is2
.is_input_section()
6419 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6420 ->has_small_toc_reloc()));
6421 return small1
&& !small2
;
6425 // Finalize the sections.
6427 template<int size
, bool big_endian
>
6429 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6431 const Input_objects
*,
6432 Symbol_table
* symtab
)
6434 if (parameters
->doing_static_link())
6436 // At least some versions of glibc elf-init.o have a strong
6437 // reference to __rela_iplt marker syms. A weak ref would be
6439 if (this->iplt_
!= NULL
)
6441 Reloc_section
* rel
= this->iplt_
->rel_plt();
6442 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6443 Symbol_table::PREDEFINED
, rel
, 0, 0,
6444 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6445 elfcpp::STV_HIDDEN
, 0, false, true);
6446 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6447 Symbol_table::PREDEFINED
, rel
, 0, 0,
6448 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6449 elfcpp::STV_HIDDEN
, 0, true, true);
6453 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6454 Symbol_table::PREDEFINED
, 0, 0,
6455 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6456 elfcpp::STV_HIDDEN
, 0, true, false);
6457 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6458 Symbol_table::PREDEFINED
, 0, 0,
6459 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6460 elfcpp::STV_HIDDEN
, 0, true, false);
6466 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6467 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6469 if (!parameters
->options().relocatable())
6471 this->define_save_restore_funcs(layout
, symtab
);
6473 // Annoyingly, we need to make these sections now whether or
6474 // not we need them. If we delay until do_relax then we
6475 // need to mess with the relaxation machinery checkpointing.
6476 this->got_section(symtab
, layout
);
6477 this->make_brlt_section(layout
);
6479 if (parameters
->options().toc_sort())
6481 Output_section
* os
= this->got_
->output_section();
6482 if (os
!= NULL
&& os
->input_sections().size() > 1)
6483 std::stable_sort(os
->input_sections().begin(),
6484 os
->input_sections().end(),
6485 Sort_toc_sections
<big_endian
>());
6490 // Fill in some more dynamic tags.
6491 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6494 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6496 : this->plt_
->rel_plt());
6497 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6498 this->rela_dyn_
, true, size
== 32);
6502 if (this->got_
!= NULL
)
6504 this->got_
->finalize_data_size();
6505 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6506 this->got_
, this->got_
->g_o_t());
6511 if (this->glink_
!= NULL
)
6513 this->glink_
->finalize_data_size();
6514 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6516 (this->glink_
->pltresolve_size
6522 // Emit any relocs we saved in an attempt to avoid generating COPY
6524 if (this->copy_relocs_
.any_saved_relocs())
6525 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6528 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6532 ok_lo_toc_insn(uint32_t insn
)
6534 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6535 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6536 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6537 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6538 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6539 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6540 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6541 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6542 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6543 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6544 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6545 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6546 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6547 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6548 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6550 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6551 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6552 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6555 // Return the value to use for a branch relocation.
6557 template<int size
, bool big_endian
>
6558 typename Target_powerpc
<size
, big_endian
>::Address
6559 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6560 const Symbol_table
* symtab
,
6562 const Sized_symbol
<size
>* gsym
,
6563 Powerpc_relobj
<size
, big_endian
>* object
,
6564 unsigned int *dest_shndx
)
6566 if (size
== 32 || this->abiversion() >= 2)
6570 // If the symbol is defined in an opd section, ie. is a function
6571 // descriptor, use the function descriptor code entry address
6572 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6574 && gsym
->source() != Symbol::FROM_OBJECT
)
6577 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6578 unsigned int shndx
= symobj
->opd_shndx();
6581 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6582 if (opd_addr
== invalid_address
)
6584 opd_addr
+= symobj
->output_section_address(shndx
);
6585 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
6588 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
6589 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6592 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6593 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6594 *dest_shndx
= folded
.second
;
6596 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6597 gold_assert(sec_addr
!= invalid_address
);
6598 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6599 value
= sec_addr
+ sec_off
;
6604 // Perform a relocation.
6606 template<int size
, bool big_endian
>
6608 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6609 const Relocate_info
<size
, big_endian
>* relinfo
,
6610 Target_powerpc
* target
,
6613 const elfcpp::Rela
<size
, big_endian
>& rela
,
6614 unsigned int r_type
,
6615 const Sized_symbol
<size
>* gsym
,
6616 const Symbol_value
<size
>* psymval
,
6617 unsigned char* view
,
6619 section_size_type view_size
)
6624 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6626 case Track_tls::NOT_EXPECTED
:
6627 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6628 _("__tls_get_addr call lacks marker reloc"));
6630 case Track_tls::EXPECTED
:
6631 // We have already complained.
6633 case Track_tls::SKIP
:
6635 case Track_tls::NORMAL
:
6639 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6640 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6641 Powerpc_relobj
<size
, big_endian
>* const object
6642 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6644 bool has_plt_value
= false;
6645 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6647 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
6648 : object
->local_has_plt_offset(r_sym
))
6649 && (!psymval
->is_ifunc_symbol()
6650 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
6654 && target
->abiversion() >= 2
6655 && !parameters
->options().output_is_position_independent()
6656 && !is_branch_reloc(r_type
))
6658 unsigned int off
= target
->glink_section()->find_global_entry(gsym
);
6659 gold_assert(off
!= (unsigned int)-1);
6660 value
= target
->glink_section()->global_entry_address() + off
;
6664 Stub_table
<size
, big_endian
>* stub_table
6665 = object
->stub_table(relinfo
->data_shndx
);
6666 if (stub_table
== NULL
)
6668 // This is a ref from a data section to an ifunc symbol.
6669 if (target
->stub_tables().size() != 0)
6670 stub_table
= target
->stub_tables()[0];
6672 gold_assert(stub_table
!= NULL
);
6675 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
6676 rela
.get_r_addend());
6678 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
6679 rela
.get_r_addend());
6680 gold_assert(off
!= invalid_address
);
6681 value
= stub_table
->stub_address() + off
;
6683 has_plt_value
= true;
6686 if (r_type
== elfcpp::R_POWERPC_GOT16
6687 || r_type
== elfcpp::R_POWERPC_GOT16_LO
6688 || r_type
== elfcpp::R_POWERPC_GOT16_HI
6689 || r_type
== elfcpp::R_POWERPC_GOT16_HA
6690 || r_type
== elfcpp::R_PPC64_GOT16_DS
6691 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
6695 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
6696 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
6700 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6701 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
6702 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
6704 value
-= target
->got_section()->got_base_offset(object
);
6706 else if (r_type
== elfcpp::R_PPC64_TOC
)
6708 value
= (target
->got_section()->output_section()->address()
6709 + object
->toc_base_offset());
6711 else if (gsym
!= NULL
6712 && (r_type
== elfcpp::R_POWERPC_REL24
6713 || r_type
== elfcpp::R_PPC_PLTREL24
)
6718 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
6719 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
6720 bool can_plt_call
= false;
6721 if (rela
.get_r_offset() + 8 <= view_size
)
6723 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
6724 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
6727 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
6729 elfcpp::Swap
<32, big_endian
>::
6730 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
6731 can_plt_call
= true;
6736 // If we don't have a branch and link followed by a nop,
6737 // we can't go via the plt because there is no place to
6738 // put a toc restoring instruction.
6739 // Unless we know we won't be returning.
6740 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
6741 can_plt_call
= true;
6745 // g++ as of 20130507 emits self-calls without a
6746 // following nop. This is arguably wrong since we have
6747 // conflicting information. On the one hand a global
6748 // symbol and on the other a local call sequence, but
6749 // don't error for this special case.
6750 // It isn't possible to cheaply verify we have exactly
6751 // such a call. Allow all calls to the same section.
6753 Address code
= value
;
6754 if (gsym
->source() == Symbol::FROM_OBJECT
6755 && gsym
->object() == object
)
6757 unsigned int dest_shndx
= 0;
6758 if (target
->abiversion() < 2)
6760 Address addend
= rela
.get_r_addend();
6761 Address opdent
= psymval
->value(object
, addend
);
6762 code
= target
->symval_for_branch(relinfo
->symtab
,
6763 opdent
, gsym
, object
,
6767 if (dest_shndx
== 0)
6768 dest_shndx
= gsym
->shndx(&is_ordinary
);
6769 ok
= dest_shndx
== relinfo
->data_shndx
;
6773 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6774 _("call lacks nop, can't restore toc; "
6775 "recompile with -fPIC"));
6781 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6782 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6783 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6784 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6786 // First instruction of a global dynamic sequence, arg setup insn.
6787 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6788 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6789 enum Got_type got_type
= GOT_TYPE_STANDARD
;
6790 if (tls_type
== tls::TLSOPT_NONE
)
6791 got_type
= GOT_TYPE_TLSGD
;
6792 else if (tls_type
== tls::TLSOPT_TO_IE
)
6793 got_type
= GOT_TYPE_TPREL
;
6794 if (got_type
!= GOT_TYPE_STANDARD
)
6798 gold_assert(gsym
->has_got_offset(got_type
));
6799 value
= gsym
->got_offset(got_type
);
6803 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6804 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
6805 value
= object
->local_got_offset(r_sym
, got_type
);
6807 value
-= target
->got_section()->got_base_offset(object
);
6809 if (tls_type
== tls::TLSOPT_TO_IE
)
6811 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6812 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6814 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6815 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6816 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
6818 insn
|= 32 << 26; // lwz
6820 insn
|= 58 << 26; // ld
6821 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6823 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6824 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6826 else if (tls_type
== tls::TLSOPT_TO_LE
)
6828 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6829 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6831 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6832 Insn insn
= addis_3_13
;
6835 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6836 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6837 value
= psymval
->value(object
, rela
.get_r_addend());
6841 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6843 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6844 r_type
= elfcpp::R_POWERPC_NONE
;
6848 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6849 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6850 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6851 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6853 // First instruction of a local dynamic sequence, arg setup insn.
6854 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6855 if (tls_type
== tls::TLSOPT_NONE
)
6857 value
= target
->tlsld_got_offset();
6858 value
-= target
->got_section()->got_base_offset(object
);
6862 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6863 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6864 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6866 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6867 Insn insn
= addis_3_13
;
6870 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6871 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6876 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6878 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6879 r_type
= elfcpp::R_POWERPC_NONE
;
6883 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
6884 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
6885 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
6886 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
6888 // Accesses relative to a local dynamic sequence address,
6889 // no optimisation here.
6892 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
6893 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
6897 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6898 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
6899 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
6901 value
-= target
->got_section()->got_base_offset(object
);
6903 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6904 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6905 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6906 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6908 // First instruction of initial exec sequence.
6909 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6910 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6911 if (tls_type
== tls::TLSOPT_NONE
)
6915 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
6916 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
6920 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6921 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
6922 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
6924 value
-= target
->got_section()->got_base_offset(object
);
6928 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6929 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6930 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6932 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6933 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6934 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
6939 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6940 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6941 value
= psymval
->value(object
, rela
.get_r_addend());
6945 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6947 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6948 r_type
= elfcpp::R_POWERPC_NONE
;
6952 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6953 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6955 // Second instruction of a global dynamic sequence,
6956 // the __tls_get_addr call
6957 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6958 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6959 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6960 if (tls_type
!= tls::TLSOPT_NONE
)
6962 if (tls_type
== tls::TLSOPT_TO_IE
)
6964 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6965 Insn insn
= add_3_3_13
;
6968 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6969 r_type
= elfcpp::R_POWERPC_NONE
;
6973 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6974 Insn insn
= addi_3_3
;
6975 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6976 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6977 view
+= 2 * big_endian
;
6978 value
= psymval
->value(object
, rela
.get_r_addend());
6980 this->skip_next_tls_get_addr_call();
6983 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6984 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6986 // Second instruction of a local dynamic sequence,
6987 // the __tls_get_addr call
6988 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6989 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6990 if (tls_type
== tls::TLSOPT_TO_LE
)
6992 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6993 Insn insn
= addi_3_3
;
6994 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6995 this->skip_next_tls_get_addr_call();
6996 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6997 view
+= 2 * big_endian
;
7001 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7003 // Second instruction of an initial exec sequence
7004 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7005 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7006 if (tls_type
== tls::TLSOPT_TO_LE
)
7008 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7009 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7010 unsigned int reg
= size
== 32 ? 2 : 13;
7011 insn
= at_tls_transform(insn
, reg
);
7012 gold_assert(insn
!= 0);
7013 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7014 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7015 view
+= 2 * big_endian
;
7016 value
= psymval
->value(object
, rela
.get_r_addend());
7019 else if (!has_plt_value
)
7022 unsigned int dest_shndx
;
7023 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
7024 addend
= rela
.get_r_addend();
7025 value
= psymval
->value(object
, addend
);
7026 if (size
== 64 && is_branch_reloc(r_type
))
7028 if (target
->abiversion() >= 2)
7031 value
+= object
->ppc64_local_entry_offset(gsym
);
7033 value
+= object
->ppc64_local_entry_offset(r_sym
);
7036 value
= target
->symval_for_branch(relinfo
->symtab
, value
,
7037 gsym
, object
, &dest_shndx
);
7039 unsigned int max_branch_offset
= 0;
7040 if (r_type
== elfcpp::R_POWERPC_REL24
7041 || r_type
== elfcpp::R_PPC_PLTREL24
7042 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
7043 max_branch_offset
= 1 << 25;
7044 else if (r_type
== elfcpp::R_POWERPC_REL14
7045 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
7046 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
7047 max_branch_offset
= 1 << 15;
7048 if (max_branch_offset
!= 0
7049 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7051 Stub_table
<size
, big_endian
>* stub_table
7052 = object
->stub_table(relinfo
->data_shndx
);
7053 if (stub_table
!= NULL
)
7055 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7056 if (off
!= invalid_address
)
7057 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7065 case elfcpp::R_PPC64_REL64
:
7066 case elfcpp::R_POWERPC_REL32
:
7067 case elfcpp::R_POWERPC_REL24
:
7068 case elfcpp::R_PPC_PLTREL24
:
7069 case elfcpp::R_PPC_LOCAL24PC
:
7070 case elfcpp::R_POWERPC_REL16
:
7071 case elfcpp::R_POWERPC_REL16_LO
:
7072 case elfcpp::R_POWERPC_REL16_HI
:
7073 case elfcpp::R_POWERPC_REL16_HA
:
7074 case elfcpp::R_POWERPC_REL14
:
7075 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7076 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7080 case elfcpp::R_PPC64_TOC16
:
7081 case elfcpp::R_PPC64_TOC16_LO
:
7082 case elfcpp::R_PPC64_TOC16_HI
:
7083 case elfcpp::R_PPC64_TOC16_HA
:
7084 case elfcpp::R_PPC64_TOC16_DS
:
7085 case elfcpp::R_PPC64_TOC16_LO_DS
:
7086 // Subtract the TOC base address.
7087 value
-= (target
->got_section()->output_section()->address()
7088 + object
->toc_base_offset());
7091 case elfcpp::R_POWERPC_SECTOFF
:
7092 case elfcpp::R_POWERPC_SECTOFF_LO
:
7093 case elfcpp::R_POWERPC_SECTOFF_HI
:
7094 case elfcpp::R_POWERPC_SECTOFF_HA
:
7095 case elfcpp::R_PPC64_SECTOFF_DS
:
7096 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7098 value
-= os
->address();
7101 case elfcpp::R_PPC64_TPREL16_DS
:
7102 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7103 case elfcpp::R_PPC64_TPREL16_HIGH
:
7104 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7106 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7108 case elfcpp::R_POWERPC_TPREL16
:
7109 case elfcpp::R_POWERPC_TPREL16_LO
:
7110 case elfcpp::R_POWERPC_TPREL16_HI
:
7111 case elfcpp::R_POWERPC_TPREL16_HA
:
7112 case elfcpp::R_POWERPC_TPREL
:
7113 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7114 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7115 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7116 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7117 // tls symbol values are relative to tls_segment()->vaddr()
7121 case elfcpp::R_PPC64_DTPREL16_DS
:
7122 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7123 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7124 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7125 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7126 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7128 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7129 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7131 case elfcpp::R_POWERPC_DTPREL16
:
7132 case elfcpp::R_POWERPC_DTPREL16_LO
:
7133 case elfcpp::R_POWERPC_DTPREL16_HI
:
7134 case elfcpp::R_POWERPC_DTPREL16_HA
:
7135 case elfcpp::R_POWERPC_DTPREL
:
7136 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7137 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7138 // tls symbol values are relative to tls_segment()->vaddr()
7139 value
-= dtp_offset
;
7142 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7144 value
+= object
->ppc64_local_entry_offset(gsym
);
7146 value
+= object
->ppc64_local_entry_offset(r_sym
);
7153 Insn branch_bit
= 0;
7156 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7157 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7158 branch_bit
= 1 << 21;
7159 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7160 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7162 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7163 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7166 if (this->is_isa_v2
)
7168 // Set 'a' bit. This is 0b00010 in BO field for branch
7169 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7170 // for branch on CTR insns (BO == 1a00t or 1a01t).
7171 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7173 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7180 // Invert 'y' bit if not the default.
7181 if (static_cast<Signed_address
>(value
) < 0)
7184 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7194 // Multi-instruction sequences that access the TOC can be
7195 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7196 // to nop; addi rb,r2,x;
7202 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7203 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7204 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7205 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7206 case elfcpp::R_POWERPC_GOT16_HA
:
7207 case elfcpp::R_PPC64_TOC16_HA
:
7208 if (parameters
->options().toc_optimize())
7210 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7211 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7212 if ((insn
& ((0x3f << 26) | 0x1f << 16))
7213 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7214 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7215 _("toc optimization is not supported "
7216 "for %#08x instruction"), insn
);
7217 else if (value
+ 0x8000 < 0x10000)
7219 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7225 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7226 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7227 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7228 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7229 case elfcpp::R_POWERPC_GOT16_LO
:
7230 case elfcpp::R_PPC64_GOT16_LO_DS
:
7231 case elfcpp::R_PPC64_TOC16_LO
:
7232 case elfcpp::R_PPC64_TOC16_LO_DS
:
7233 if (parameters
->options().toc_optimize())
7235 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7236 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7237 if (!ok_lo_toc_insn(insn
))
7238 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7239 _("toc optimization is not supported "
7240 "for %#08x instruction"), insn
);
7241 else if (value
+ 0x8000 < 0x10000)
7243 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7245 // Transform addic to addi when we change reg.
7246 insn
&= ~((0x3f << 26) | (0x1f << 16));
7247 insn
|= (14u << 26) | (2 << 16);
7251 insn
&= ~(0x1f << 16);
7254 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7261 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7264 case elfcpp::R_POWERPC_ADDR32
:
7265 case elfcpp::R_POWERPC_UADDR32
:
7267 overflow
= Reloc::CHECK_BITFIELD
;
7270 case elfcpp::R_POWERPC_REL32
:
7272 overflow
= Reloc::CHECK_SIGNED
;
7275 case elfcpp::R_POWERPC_ADDR24
:
7276 case elfcpp::R_POWERPC_ADDR16
:
7277 case elfcpp::R_POWERPC_UADDR16
:
7278 case elfcpp::R_PPC64_ADDR16_DS
:
7279 case elfcpp::R_POWERPC_ADDR14
:
7280 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7281 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7282 overflow
= Reloc::CHECK_BITFIELD
;
7285 case elfcpp::R_POWERPC_ADDR16_HI
:
7286 case elfcpp::R_POWERPC_ADDR16_HA
:
7287 case elfcpp::R_POWERPC_GOT16_HI
:
7288 case elfcpp::R_POWERPC_GOT16_HA
:
7289 case elfcpp::R_POWERPC_PLT16_HI
:
7290 case elfcpp::R_POWERPC_PLT16_HA
:
7291 case elfcpp::R_POWERPC_SECTOFF_HI
:
7292 case elfcpp::R_POWERPC_SECTOFF_HA
:
7293 case elfcpp::R_PPC64_TOC16_HI
:
7294 case elfcpp::R_PPC64_TOC16_HA
:
7295 case elfcpp::R_PPC64_PLTGOT16_HI
:
7296 case elfcpp::R_PPC64_PLTGOT16_HA
:
7297 case elfcpp::R_POWERPC_TPREL16_HI
:
7298 case elfcpp::R_POWERPC_TPREL16_HA
:
7299 case elfcpp::R_POWERPC_DTPREL16_HI
:
7300 case elfcpp::R_POWERPC_DTPREL16_HA
:
7301 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7302 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7303 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7304 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7305 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7306 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7307 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7308 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7309 case elfcpp::R_POWERPC_REL16_HI
:
7310 case elfcpp::R_POWERPC_REL16_HA
:
7313 case elfcpp::R_POWERPC_REL24
:
7314 case elfcpp::R_PPC_PLTREL24
:
7315 case elfcpp::R_PPC_LOCAL24PC
:
7316 case elfcpp::R_POWERPC_REL16
:
7317 case elfcpp::R_PPC64_TOC16
:
7318 case elfcpp::R_POWERPC_GOT16
:
7319 case elfcpp::R_POWERPC_SECTOFF
:
7320 case elfcpp::R_POWERPC_TPREL16
:
7321 case elfcpp::R_POWERPC_DTPREL16
:
7322 case elfcpp::R_PPC64_TPREL16_DS
:
7323 case elfcpp::R_PPC64_DTPREL16_DS
:
7324 case elfcpp::R_PPC64_TOC16_DS
:
7325 case elfcpp::R_PPC64_GOT16_DS
:
7326 case elfcpp::R_PPC64_SECTOFF_DS
:
7327 case elfcpp::R_POWERPC_REL14
:
7328 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7329 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7330 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7331 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7332 case elfcpp::R_POWERPC_GOT_TPREL16
:
7333 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7334 overflow
= Reloc::CHECK_SIGNED
;
7338 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7339 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7342 case elfcpp::R_POWERPC_NONE
:
7343 case elfcpp::R_POWERPC_TLS
:
7344 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7345 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7348 case elfcpp::R_PPC64_ADDR64
:
7349 case elfcpp::R_PPC64_REL64
:
7350 case elfcpp::R_PPC64_TOC
:
7351 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7352 Reloc::addr64(view
, value
);
7355 case elfcpp::R_POWERPC_TPREL
:
7356 case elfcpp::R_POWERPC_DTPREL
:
7358 Reloc::addr64(view
, value
);
7360 status
= Reloc::addr32(view
, value
, overflow
);
7363 case elfcpp::R_PPC64_UADDR64
:
7364 Reloc::addr64_u(view
, value
);
7367 case elfcpp::R_POWERPC_ADDR32
:
7368 status
= Reloc::addr32(view
, value
, overflow
);
7371 case elfcpp::R_POWERPC_REL32
:
7372 case elfcpp::R_POWERPC_UADDR32
:
7373 status
= Reloc::addr32_u(view
, value
, overflow
);
7376 case elfcpp::R_POWERPC_ADDR24
:
7377 case elfcpp::R_POWERPC_REL24
:
7378 case elfcpp::R_PPC_PLTREL24
:
7379 case elfcpp::R_PPC_LOCAL24PC
:
7380 status
= Reloc::addr24(view
, value
, overflow
);
7383 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7384 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7387 status
= Reloc::addr16_ds(view
, value
, overflow
);
7390 case elfcpp::R_POWERPC_ADDR16
:
7391 case elfcpp::R_POWERPC_REL16
:
7392 case elfcpp::R_PPC64_TOC16
:
7393 case elfcpp::R_POWERPC_GOT16
:
7394 case elfcpp::R_POWERPC_SECTOFF
:
7395 case elfcpp::R_POWERPC_TPREL16
:
7396 case elfcpp::R_POWERPC_DTPREL16
:
7397 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7398 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7399 case elfcpp::R_POWERPC_GOT_TPREL16
:
7400 case elfcpp::R_POWERPC_ADDR16_LO
:
7401 case elfcpp::R_POWERPC_REL16_LO
:
7402 case elfcpp::R_PPC64_TOC16_LO
:
7403 case elfcpp::R_POWERPC_GOT16_LO
:
7404 case elfcpp::R_POWERPC_SECTOFF_LO
:
7405 case elfcpp::R_POWERPC_TPREL16_LO
:
7406 case elfcpp::R_POWERPC_DTPREL16_LO
:
7407 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7408 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7409 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7410 status
= Reloc::addr16(view
, value
, overflow
);
7413 case elfcpp::R_POWERPC_UADDR16
:
7414 status
= Reloc::addr16_u(view
, value
, overflow
);
7417 case elfcpp::R_PPC64_ADDR16_HIGH
:
7418 case elfcpp::R_PPC64_TPREL16_HIGH
:
7419 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7421 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7423 case elfcpp::R_POWERPC_ADDR16_HI
:
7424 case elfcpp::R_POWERPC_REL16_HI
:
7425 case elfcpp::R_PPC64_TOC16_HI
:
7426 case elfcpp::R_POWERPC_GOT16_HI
:
7427 case elfcpp::R_POWERPC_SECTOFF_HI
:
7428 case elfcpp::R_POWERPC_TPREL16_HI
:
7429 case elfcpp::R_POWERPC_DTPREL16_HI
:
7430 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7431 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7432 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7433 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7434 Reloc::addr16_hi(view
, value
);
7437 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7438 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7439 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7441 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7443 case elfcpp::R_POWERPC_ADDR16_HA
:
7444 case elfcpp::R_POWERPC_REL16_HA
:
7445 case elfcpp::R_PPC64_TOC16_HA
:
7446 case elfcpp::R_POWERPC_GOT16_HA
:
7447 case elfcpp::R_POWERPC_SECTOFF_HA
:
7448 case elfcpp::R_POWERPC_TPREL16_HA
:
7449 case elfcpp::R_POWERPC_DTPREL16_HA
:
7450 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7451 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7452 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7453 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7454 Reloc::addr16_ha(view
, value
);
7457 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7459 // R_PPC_EMB_NADDR16_LO
7461 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7462 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7463 Reloc::addr16_hi2(view
, value
);
7466 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7468 // R_PPC_EMB_NADDR16_HI
7470 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7471 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7472 Reloc::addr16_ha2(view
, value
);
7475 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7477 // R_PPC_EMB_NADDR16_HA
7479 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7480 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7481 Reloc::addr16_hi3(view
, value
);
7484 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7488 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7489 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7490 Reloc::addr16_ha3(view
, value
);
7493 case elfcpp::R_PPC64_DTPREL16_DS
:
7494 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7496 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7498 case elfcpp::R_PPC64_TPREL16_DS
:
7499 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7501 // R_PPC_TLSGD, R_PPC_TLSLD
7503 case elfcpp::R_PPC64_ADDR16_DS
:
7504 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7505 case elfcpp::R_PPC64_TOC16_DS
:
7506 case elfcpp::R_PPC64_TOC16_LO_DS
:
7507 case elfcpp::R_PPC64_GOT16_DS
:
7508 case elfcpp::R_PPC64_GOT16_LO_DS
:
7509 case elfcpp::R_PPC64_SECTOFF_DS
:
7510 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7511 status
= Reloc::addr16_ds(view
, value
, overflow
);
7514 case elfcpp::R_POWERPC_ADDR14
:
7515 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7516 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7517 case elfcpp::R_POWERPC_REL14
:
7518 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7519 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7520 status
= Reloc::addr14(view
, value
, overflow
);
7523 case elfcpp::R_POWERPC_COPY
:
7524 case elfcpp::R_POWERPC_GLOB_DAT
:
7525 case elfcpp::R_POWERPC_JMP_SLOT
:
7526 case elfcpp::R_POWERPC_RELATIVE
:
7527 case elfcpp::R_POWERPC_DTPMOD
:
7528 case elfcpp::R_PPC64_JMP_IREL
:
7529 case elfcpp::R_POWERPC_IRELATIVE
:
7530 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7531 _("unexpected reloc %u in object file"),
7535 case elfcpp::R_PPC_EMB_SDA21
:
7540 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7544 case elfcpp::R_PPC_EMB_SDA2I16
:
7545 case elfcpp::R_PPC_EMB_SDA2REL
:
7548 // R_PPC64_TLSGD, R_PPC64_TLSLD
7551 case elfcpp::R_POWERPC_PLT32
:
7552 case elfcpp::R_POWERPC_PLTREL32
:
7553 case elfcpp::R_POWERPC_PLT16_LO
:
7554 case elfcpp::R_POWERPC_PLT16_HI
:
7555 case elfcpp::R_POWERPC_PLT16_HA
:
7556 case elfcpp::R_PPC_SDAREL16
:
7557 case elfcpp::R_POWERPC_ADDR30
:
7558 case elfcpp::R_PPC64_PLT64
:
7559 case elfcpp::R_PPC64_PLTREL64
:
7560 case elfcpp::R_PPC64_PLTGOT16
:
7561 case elfcpp::R_PPC64_PLTGOT16_LO
:
7562 case elfcpp::R_PPC64_PLTGOT16_HI
:
7563 case elfcpp::R_PPC64_PLTGOT16_HA
:
7564 case elfcpp::R_PPC64_PLT16_LO_DS
:
7565 case elfcpp::R_PPC64_PLTGOT16_DS
:
7566 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7567 case elfcpp::R_PPC_EMB_RELSDA
:
7568 case elfcpp::R_PPC_TOC16
:
7571 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7572 _("unsupported reloc %u"),
7576 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
7577 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7578 _("relocation overflow"));
7583 // Relocate section data.
7585 template<int size
, bool big_endian
>
7587 Target_powerpc
<size
, big_endian
>::relocate_section(
7588 const Relocate_info
<size
, big_endian
>* relinfo
,
7589 unsigned int sh_type
,
7590 const unsigned char* prelocs
,
7592 Output_section
* output_section
,
7593 bool needs_special_offset_handling
,
7594 unsigned char* view
,
7596 section_size_type view_size
,
7597 const Reloc_symbol_changes
* reloc_symbol_changes
)
7599 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7600 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
7601 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
7602 Powerpc_comdat_behavior
;
7604 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7606 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
7607 Powerpc_relocate
, Powerpc_comdat_behavior
>(
7613 needs_special_offset_handling
,
7617 reloc_symbol_changes
);
7620 class Powerpc_scan_relocatable_reloc
7623 // Return the strategy to use for a local symbol which is not a
7624 // section symbol, given the relocation type.
7625 inline Relocatable_relocs::Reloc_strategy
7626 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
7628 if (r_type
== 0 && r_sym
== 0)
7629 return Relocatable_relocs::RELOC_DISCARD
;
7630 return Relocatable_relocs::RELOC_COPY
;
7633 // Return the strategy to use for a local symbol which is a section
7634 // symbol, given the relocation type.
7635 inline Relocatable_relocs::Reloc_strategy
7636 local_section_strategy(unsigned int, Relobj
*)
7638 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
7641 // Return the strategy to use for a global symbol, given the
7642 // relocation type, the object, and the symbol index.
7643 inline Relocatable_relocs::Reloc_strategy
7644 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
7646 if (r_type
== elfcpp::R_PPC_PLTREL24
)
7647 return Relocatable_relocs::RELOC_SPECIAL
;
7648 return Relocatable_relocs::RELOC_COPY
;
7652 // Scan the relocs during a relocatable link.
7654 template<int size
, bool big_endian
>
7656 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
7657 Symbol_table
* symtab
,
7659 Sized_relobj_file
<size
, big_endian
>* object
,
7660 unsigned int data_shndx
,
7661 unsigned int sh_type
,
7662 const unsigned char* prelocs
,
7664 Output_section
* output_section
,
7665 bool needs_special_offset_handling
,
7666 size_t local_symbol_count
,
7667 const unsigned char* plocal_symbols
,
7668 Relocatable_relocs
* rr
)
7670 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7672 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
7673 Powerpc_scan_relocatable_reloc
>(
7681 needs_special_offset_handling
,
7687 // Emit relocations for a section.
7688 // This is a modified version of the function by the same name in
7689 // target-reloc.h. Using relocate_special_relocatable for
7690 // R_PPC_PLTREL24 would require duplication of the entire body of the
7691 // loop, so we may as well duplicate the whole thing.
7693 template<int size
, bool big_endian
>
7695 Target_powerpc
<size
, big_endian
>::relocate_relocs(
7696 const Relocate_info
<size
, big_endian
>* relinfo
,
7697 unsigned int sh_type
,
7698 const unsigned char* prelocs
,
7700 Output_section
* output_section
,
7701 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
7702 const Relocatable_relocs
* rr
,
7704 Address view_address
,
7706 unsigned char* reloc_view
,
7707 section_size_type reloc_view_size
)
7709 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7711 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
7713 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
7715 const int reloc_size
7716 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
7718 Powerpc_relobj
<size
, big_endian
>* const object
7719 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7720 const unsigned int local_count
= object
->local_symbol_count();
7721 unsigned int got2_shndx
= object
->got2_shndx();
7722 Address got2_addend
= 0;
7723 if (got2_shndx
!= 0)
7725 got2_addend
= object
->get_output_section_offset(got2_shndx
);
7726 gold_assert(got2_addend
!= invalid_address
);
7729 unsigned char* pwrite
= reloc_view
;
7730 bool zap_next
= false;
7731 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
7733 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
7734 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
7737 Reltype
reloc(prelocs
);
7738 Reltype_write
reloc_write(pwrite
);
7740 Address offset
= reloc
.get_r_offset();
7741 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
7742 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
7743 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
7744 const unsigned int orig_r_sym
= r_sym
;
7745 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
7746 = reloc
.get_r_addend();
7747 const Symbol
* gsym
= NULL
;
7751 // We could arrange to discard these and other relocs for
7752 // tls optimised sequences in the strategy methods, but for
7753 // now do as BFD ld does.
7754 r_type
= elfcpp::R_POWERPC_NONE
;
7758 // Get the new symbol index.
7759 if (r_sym
< local_count
)
7763 case Relocatable_relocs::RELOC_COPY
:
7764 case Relocatable_relocs::RELOC_SPECIAL
:
7767 r_sym
= object
->symtab_index(r_sym
);
7768 gold_assert(r_sym
!= -1U);
7772 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
7774 // We are adjusting a section symbol. We need to find
7775 // the symbol table index of the section symbol for
7776 // the output section corresponding to input section
7777 // in which this symbol is defined.
7778 gold_assert(r_sym
< local_count
);
7780 unsigned int shndx
=
7781 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
7782 gold_assert(is_ordinary
);
7783 Output_section
* os
= object
->output_section(shndx
);
7784 gold_assert(os
!= NULL
);
7785 gold_assert(os
->needs_symtab_index());
7786 r_sym
= os
->symtab_index();
7796 gsym
= object
->global_symbol(r_sym
);
7797 gold_assert(gsym
!= NULL
);
7798 if (gsym
->is_forwarder())
7799 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
7801 gold_assert(gsym
->has_symtab_index());
7802 r_sym
= gsym
->symtab_index();
7805 // Get the new offset--the location in the output section where
7806 // this relocation should be applied.
7807 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7808 offset
+= offset_in_output_section
;
7811 section_offset_type sot_offset
=
7812 convert_types
<section_offset_type
, Address
>(offset
);
7813 section_offset_type new_sot_offset
=
7814 output_section
->output_offset(object
, relinfo
->data_shndx
,
7816 gold_assert(new_sot_offset
!= -1);
7817 offset
= new_sot_offset
;
7820 // In an object file, r_offset is an offset within the section.
7821 // In an executable or dynamic object, generated by
7822 // --emit-relocs, r_offset is an absolute address.
7823 if (!parameters
->options().relocatable())
7825 offset
+= view_address
;
7826 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7827 offset
-= offset_in_output_section
;
7830 // Handle the reloc addend based on the strategy.
7831 if (strategy
== Relocatable_relocs::RELOC_COPY
)
7833 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
7835 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
7836 addend
= psymval
->value(object
, addend
);
7838 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
7840 if (addend
>= 32768)
7841 addend
+= got2_addend
;
7846 if (!parameters
->options().relocatable())
7848 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7849 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7850 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7851 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7853 // First instruction of a global dynamic sequence,
7855 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7856 switch (this->optimize_tls_gd(final
))
7858 case tls::TLSOPT_TO_IE
:
7859 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7860 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7862 case tls::TLSOPT_TO_LE
:
7863 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7864 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7865 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7868 r_type
= elfcpp::R_POWERPC_NONE
;
7869 offset
-= 2 * big_endian
;
7876 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7877 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7878 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7879 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7881 // First instruction of a local dynamic sequence,
7883 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7885 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7886 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7888 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7889 const Output_section
* os
= relinfo
->layout
->tls_segment()
7891 gold_assert(os
!= NULL
);
7892 gold_assert(os
->needs_symtab_index());
7893 r_sym
= os
->symtab_index();
7894 addend
= dtp_offset
;
7898 r_type
= elfcpp::R_POWERPC_NONE
;
7899 offset
-= 2 * big_endian
;
7903 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7904 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7905 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7906 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7908 // First instruction of initial exec sequence.
7909 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7910 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7912 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7913 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7914 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7917 r_type
= elfcpp::R_POWERPC_NONE
;
7918 offset
-= 2 * big_endian
;
7922 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7923 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7925 // Second instruction of a global dynamic sequence,
7926 // the __tls_get_addr call
7927 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7928 switch (this->optimize_tls_gd(final
))
7930 case tls::TLSOPT_TO_IE
:
7931 r_type
= elfcpp::R_POWERPC_NONE
;
7934 case tls::TLSOPT_TO_LE
:
7935 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7936 offset
+= 2 * big_endian
;
7943 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7944 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7946 // Second instruction of a local dynamic sequence,
7947 // the __tls_get_addr call
7948 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7950 const Output_section
* os
= relinfo
->layout
->tls_segment()
7952 gold_assert(os
!= NULL
);
7953 gold_assert(os
->needs_symtab_index());
7954 r_sym
= os
->symtab_index();
7955 addend
= dtp_offset
;
7956 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7957 offset
+= 2 * big_endian
;
7961 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7963 // Second instruction of an initial exec sequence
7964 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7965 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7967 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7968 offset
+= 2 * big_endian
;
7973 reloc_write
.put_r_offset(offset
);
7974 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
7975 reloc_write
.put_r_addend(addend
);
7977 pwrite
+= reloc_size
;
7980 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
7981 == reloc_view_size
);
7984 // Return the value to use for a dynamic symbol which requires special
7985 // treatment. This is how we support equality comparisons of function
7986 // pointers across shared library boundaries, as described in the
7987 // processor specific ABI supplement.
7989 template<int size
, bool big_endian
>
7991 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
7995 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
7996 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7997 p
!= this->stub_tables_
.end();
8000 Address off
= (*p
)->find_plt_call_entry(gsym
);
8001 if (off
!= invalid_address
)
8002 return (*p
)->stub_address() + off
;
8005 else if (this->abiversion() >= 2)
8007 unsigned int off
= this->glink_section()->find_global_entry(gsym
);
8008 if (off
!= (unsigned int)-1)
8009 return this->glink_section()->global_entry_address() + off
;
8014 // Return the PLT address to use for a local symbol.
8015 template<int size
, bool big_endian
>
8017 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8018 const Relobj
* object
,
8019 unsigned int symndx
) const
8023 const Sized_relobj
<size
, big_endian
>* relobj
8024 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8025 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8026 p
!= this->stub_tables_
.end();
8029 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8031 if (off
!= invalid_address
)
8032 return (*p
)->stub_address() + off
;
8038 // Return the PLT address to use for a global symbol.
8039 template<int size
, bool big_endian
>
8041 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8042 const Symbol
* gsym
) const
8046 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8047 p
!= this->stub_tables_
.end();
8050 Address off
= (*p
)->find_plt_call_entry(gsym
);
8051 if (off
!= invalid_address
)
8052 return (*p
)->stub_address() + off
;
8055 else if (this->abiversion() >= 2)
8057 unsigned int off
= this->glink_section()->find_global_entry(gsym
);
8058 if (off
!= (unsigned int)-1)
8059 return this->glink_section()->global_entry_address() + off
;
8064 // Return the offset to use for the GOT_INDX'th got entry which is
8065 // for a local tls symbol specified by OBJECT, SYMNDX.
8066 template<int size
, bool big_endian
>
8068 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8069 const Relobj
* object
,
8070 unsigned int symndx
,
8071 unsigned int got_indx
) const
8073 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8074 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8075 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8077 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8078 got_type
<= GOT_TYPE_TPREL
;
8079 got_type
= Got_type(got_type
+ 1))
8080 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8082 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8083 if (got_type
== GOT_TYPE_TLSGD
)
8085 if (off
== got_indx
* (size
/ 8))
8087 if (got_type
== GOT_TYPE_TPREL
)
8097 // Return the offset to use for the GOT_INDX'th got entry which is
8098 // for global tls symbol GSYM.
8099 template<int size
, bool big_endian
>
8101 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8103 unsigned int got_indx
) const
8105 if (gsym
->type() == elfcpp::STT_TLS
)
8107 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8108 got_type
<= GOT_TYPE_TPREL
;
8109 got_type
= Got_type(got_type
+ 1))
8110 if (gsym
->has_got_offset(got_type
))
8112 unsigned int off
= gsym
->got_offset(got_type
);
8113 if (got_type
== GOT_TYPE_TLSGD
)
8115 if (off
== got_indx
* (size
/ 8))
8117 if (got_type
== GOT_TYPE_TPREL
)
8127 // The selector for powerpc object files.
8129 template<int size
, bool big_endian
>
8130 class Target_selector_powerpc
: public Target_selector
8133 Target_selector_powerpc()
8134 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8137 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8138 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8140 ? (big_endian
? "elf64ppc" : "elf64lppc")
8141 : (big_endian
? "elf32ppc" : "elf32lppc")))
8145 do_instantiate_target()
8146 { return new Target_powerpc
<size
, big_endian
>(); }
8149 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8150 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8151 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8152 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8154 // Instantiate these constants for -O0
8155 template<int size
, bool big_endian
>
8156 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8157 template<int size
, bool big_endian
>
8158 const typename Output_data_glink
<size
, big_endian
>::Address
8159 Output_data_glink
<size
, big_endian
>::invalid_address
;
8160 template<int size
, bool big_endian
>
8161 const typename Stub_table
<size
, big_endian
>::Address
8162 Stub_table
<size
, big_endian
>::invalid_address
;
8163 template<int size
, bool big_endian
>
8164 const typename Target_powerpc
<size
, big_endian
>::Address
8165 Target_powerpc
<size
, big_endian
>::invalid_address
;
8167 } // End anonymous namespace.