1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012 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.
28 #include "parameters.h"
35 #include "copy-relocs.h"
37 #include "target-reloc.h"
38 #include "target-select.h"
48 template<int size
, bool big_endian
>
49 class Output_data_plt_powerpc
;
51 template<int size
, bool big_endian
>
52 class Output_data_brlt_powerpc
;
54 template<int size
, bool big_endian
>
55 class Output_data_got_powerpc
;
57 template<int size
, bool big_endian
>
58 class Output_data_glink
;
60 template<int size
, bool big_endian
>
63 template<int size
, bool big_endian
>
64 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
67 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
68 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
69 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
71 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
72 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
73 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
74 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
75 opd_ent_(), access_from_map_(), has14_(), stub_table_()
81 // The .got2 section shndx.
86 return this->special_
;
91 // The .opd section shndx.
98 return this->special_
;
101 // Init OPD entry arrays.
103 init_opd(size_t opd_size
)
105 size_t count
= this->opd_ent_ndx(opd_size
);
106 this->opd_ent_
.resize(count
);
109 // Return section and offset of function entry for .opd + R_OFF.
111 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
113 size_t ndx
= this->opd_ent_ndx(r_off
);
114 gold_assert(ndx
< this->opd_ent_
.size());
115 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
117 *value
= this->opd_ent_
[ndx
].off
;
118 return this->opd_ent_
[ndx
].shndx
;
121 // Set section and offset of function entry for .opd + R_OFF.
123 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
125 size_t ndx
= this->opd_ent_ndx(r_off
);
126 gold_assert(ndx
< this->opd_ent_
.size());
127 this->opd_ent_
[ndx
].shndx
= shndx
;
128 this->opd_ent_
[ndx
].off
= value
;
131 // Return discard flag for .opd + R_OFF.
133 get_opd_discard(Address r_off
) const
135 size_t ndx
= this->opd_ent_ndx(r_off
);
136 gold_assert(ndx
< this->opd_ent_
.size());
137 return this->opd_ent_
[ndx
].discard
;
140 // Set discard flag for .opd + R_OFF.
142 set_opd_discard(Address r_off
)
144 size_t ndx
= this->opd_ent_ndx(r_off
);
145 gold_assert(ndx
< this->opd_ent_
.size());
146 this->opd_ent_
[ndx
].discard
= true;
151 { return &this->access_from_map_
; }
153 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
154 // section at DST_OFF.
156 add_reference(Object
* src_obj
,
157 unsigned int src_indx
,
158 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
160 Section_id
src_id(src_obj
, src_indx
);
161 this->access_from_map_
[dst_off
].insert(src_id
);
164 // Add a reference to the code section specified by the .opd entry
167 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
169 size_t ndx
= this->opd_ent_ndx(dst_off
);
170 if (ndx
>= this->opd_ent_
.size())
171 this->opd_ent_
.resize(ndx
+ 1);
172 this->opd_ent_
[ndx
].gc_mark
= true;
176 process_gc_mark(Symbol_table
* symtab
)
178 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
179 if (this->opd_ent_
[i
].gc_mark
)
181 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
182 symtab
->gc()->worklist().push(Section_id(this, shndx
));
188 { return this->opd_valid_
; }
192 { this->opd_valid_
= true; }
194 // Examine .rela.opd to build info about function entry points.
196 scan_opd_relocs(size_t reloc_count
,
197 const unsigned char* prelocs
,
198 const unsigned char* plocal_syms
);
200 // Perform the Sized_relobj_file method, then set up opd info from
203 do_read_relocs(Read_relocs_data
*);
206 do_find_special_sections(Read_symbols_data
* sd
);
208 // Adjust this local symbol value. Return false if the symbol
209 // should be discarded from the output file.
211 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
213 if (size
== 64 && this->opd_shndx() != 0)
216 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
218 if (this->get_opd_discard(lv
->input_value()))
224 // Return offset in output GOT section that this object will use
225 // as a TOC pointer. Won't be just a constant with multi-toc support.
227 toc_base_offset() const
231 set_has_small_toc_reloc()
232 { has_small_toc_reloc_
= true; }
235 has_small_toc_reloc() const
236 { return has_small_toc_reloc_
; }
239 set_has_14bit_branch(unsigned int shndx
)
241 if (shndx
>= this->has14_
.size())
242 this->has14_
.resize(shndx
+ 1);
243 this->has14_
[shndx
] = true;
247 has_14bit_branch(unsigned int shndx
) const
248 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
251 set_stub_table(unsigned int shndx
, Stub_table
<size
, big_endian
>* stub_table
)
253 if (shndx
>= this->stub_table_
.size())
254 this->stub_table_
.resize(shndx
+ 1);
255 this->stub_table_
[shndx
] = stub_table
;
258 Stub_table
<size
, big_endian
>*
259 stub_table(unsigned int shndx
)
261 if (shndx
< this->stub_table_
.size())
262 return this->stub_table_
[shndx
];
275 // Return index into opd_ent_ array for .opd entry at OFF.
276 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
277 // apart when the language doesn't use the last 8-byte word, the
278 // environment pointer. Thus dividing the entry section offset by
279 // 16 will give an index into opd_ent_ that works for either layout
280 // of .opd. (It leaves some elements of the vector unused when .opd
281 // entries are spaced 24 bytes apart, but we don't know the spacing
282 // until relocations are processed, and in any case it is possible
283 // for an object to have some entries spaced 16 bytes apart and
284 // others 24 bytes apart.)
286 opd_ent_ndx(size_t off
) const
289 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
290 unsigned int special_
;
292 // For 64-bit, whether this object uses small model relocs to access
294 bool has_small_toc_reloc_
;
296 // Set at the start of gc_process_relocs, when we know opd_ent_
297 // vector is valid. The flag could be made atomic and set in
298 // do_read_relocs with memory_order_release and then tested with
299 // memory_order_acquire, potentially resulting in fewer entries in
303 // The first 8-byte word of an OPD entry gives the address of the
304 // entry point of the function. Relocatable object files have a
305 // relocation on this word. The following vector records the
306 // section and offset specified by these relocations.
307 std::vector
<Opd_ent
> opd_ent_
;
309 // References made to this object's .opd section when running
310 // gc_process_relocs for another object, before the opd_ent_ vector
311 // is valid for this object.
312 Access_from access_from_map_
;
314 // Whether input section has a 14-bit branch reloc.
315 std::vector
<bool> has14_
;
317 // The stub table to use for a given input section.
318 std::vector
<Stub_table
<size
, big_endian
>*> stub_table_
;
321 template<int size
, bool big_endian
>
322 class Target_powerpc
: public Sized_target
<size
, big_endian
>
326 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
327 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
328 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
329 static const Address invalid_address
= static_cast<Address
>(0) - 1;
330 // Offset of tp and dtp pointers from start of TLS block.
331 static const Address tp_offset
= 0x7000;
332 static const Address dtp_offset
= 0x8000;
335 : Sized_target
<size
, big_endian
>(&powerpc_info
),
336 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
337 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
338 dynbss_(NULL
), tlsld_got_offset_(-1U),
339 stub_tables_(), branch_lookup_table_(), branch_info_(),
340 plt_thread_safe_(false)
344 // Process the relocations to determine unreferenced sections for
345 // garbage collection.
347 gc_process_relocs(Symbol_table
* symtab
,
349 Sized_relobj_file
<size
, big_endian
>* object
,
350 unsigned int data_shndx
,
351 unsigned int sh_type
,
352 const unsigned char* prelocs
,
354 Output_section
* output_section
,
355 bool needs_special_offset_handling
,
356 size_t local_symbol_count
,
357 const unsigned char* plocal_symbols
);
359 // Scan the relocations to look for symbol adjustments.
361 scan_relocs(Symbol_table
* symtab
,
363 Sized_relobj_file
<size
, big_endian
>* object
,
364 unsigned int data_shndx
,
365 unsigned int sh_type
,
366 const unsigned char* prelocs
,
368 Output_section
* output_section
,
369 bool needs_special_offset_handling
,
370 size_t local_symbol_count
,
371 const unsigned char* plocal_symbols
);
373 // Map input .toc section to output .got section.
375 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
377 if (size
== 64 && strcmp(name
, ".toc") == 0)
385 // Provide linker defined save/restore functions.
387 define_save_restore_funcs(Layout
*, Symbol_table
*);
389 // No stubs unless a final link.
392 { return !parameters
->options().relocatable(); }
395 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
397 // Stash info about branches, for stub generation.
399 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
400 unsigned int data_shndx
, Address r_offset
,
401 unsigned int r_type
, unsigned int r_sym
, Address addend
)
403 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
404 this->branch_info_
.push_back(info
);
405 if (r_type
== elfcpp::R_POWERPC_REL14
406 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
407 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
408 ppc_object
->set_has_14bit_branch(data_shndx
);
411 Stub_table
<size
, big_endian
>*
415 do_define_standard_symbols(Symbol_table
*, Layout
*);
417 // Finalize the sections.
419 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
421 // Return the value to use for a dynamic which requires special
424 do_dynsym_value(const Symbol
*) const;
426 // Return the PLT address to use for a local symbol.
428 do_plt_address_for_local(const Relobj
*, unsigned int) const;
430 // Return the PLT address to use for a global symbol.
432 do_plt_address_for_global(const Symbol
*) const;
434 // Return the offset to use for the GOT_INDX'th got entry which is
435 // for a local tls symbol specified by OBJECT, SYMNDX.
437 do_tls_offset_for_local(const Relobj
* object
,
439 unsigned int got_indx
) const;
441 // Return the offset to use for the GOT_INDX'th got entry which is
442 // for global tls symbol GSYM.
444 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
446 // Relocate a section.
448 relocate_section(const Relocate_info
<size
, big_endian
>*,
449 unsigned int sh_type
,
450 const unsigned char* prelocs
,
452 Output_section
* output_section
,
453 bool needs_special_offset_handling
,
455 Address view_address
,
456 section_size_type view_size
,
457 const Reloc_symbol_changes
*);
459 // Scan the relocs during a relocatable link.
461 scan_relocatable_relocs(Symbol_table
* symtab
,
463 Sized_relobj_file
<size
, big_endian
>* object
,
464 unsigned int data_shndx
,
465 unsigned int sh_type
,
466 const unsigned char* prelocs
,
468 Output_section
* output_section
,
469 bool needs_special_offset_handling
,
470 size_t local_symbol_count
,
471 const unsigned char* plocal_symbols
,
472 Relocatable_relocs
*);
474 // Emit relocations for a section.
476 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
477 unsigned int sh_type
,
478 const unsigned char* prelocs
,
480 Output_section
* output_section
,
481 typename
elfcpp::Elf_types
<size
>::Elf_Off
482 offset_in_output_section
,
483 const Relocatable_relocs
*,
485 Address view_address
,
487 unsigned char* reloc_view
,
488 section_size_type reloc_view_size
);
490 // Return whether SYM is defined by the ABI.
492 do_is_defined_by_abi(const Symbol
* sym
) const
494 return strcmp(sym
->name(), "__tls_get_addr") == 0;
497 // Return the size of the GOT section.
501 gold_assert(this->got_
!= NULL
);
502 return this->got_
->data_size();
505 // Get the PLT section.
506 const Output_data_plt_powerpc
<size
, big_endian
>*
509 gold_assert(this->plt_
!= NULL
);
513 // Get the IPLT section.
514 const Output_data_plt_powerpc
<size
, big_endian
>*
517 gold_assert(this->iplt_
!= NULL
);
521 // Get the .glink section.
522 const Output_data_glink
<size
, big_endian
>*
523 glink_section() const
525 gold_assert(this->glink_
!= NULL
);
529 // Get the GOT section.
530 const Output_data_got_powerpc
<size
, big_endian
>*
533 gold_assert(this->got_
!= NULL
);
537 // Get the GOT section, creating it if necessary.
538 Output_data_got_powerpc
<size
, big_endian
>*
539 got_section(Symbol_table
*, Layout
*);
542 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
543 const elfcpp::Ehdr
<size
, big_endian
>&);
545 // Return the number of entries in the GOT.
547 got_entry_count() const
549 if (this->got_
== NULL
)
551 return this->got_size() / (size
/ 8);
554 // Return the number of entries in the PLT.
556 plt_entry_count() const;
558 // Return the offset of the first non-reserved PLT entry.
560 first_plt_entry_offset() const;
562 // Return the size of each PLT entry.
564 plt_entry_size() const;
566 // Add any special sections for this symbol to the gc work list.
567 // For powerpc64, this adds the code section of a function
570 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
572 // Handle target specific gc actions when adding a gc reference from
573 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
574 // and DST_OFF. For powerpc64, this adds a referenc to the code
575 // section of a function descriptor.
577 do_gc_add_reference(Symbol_table
* symtab
,
579 unsigned int src_shndx
,
581 unsigned int dst_shndx
,
582 Address dst_off
) const;
584 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
587 { return this->stub_tables_
; }
589 const Output_data_brlt_powerpc
<size
, big_endian
>*
591 { return this->brlt_section_
; }
594 add_branch_lookup_table(Address to
)
596 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
597 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
601 find_branch_lookup_table(Address to
)
603 typename
Branch_lookup_table::const_iterator p
604 = this->branch_lookup_table_
.find(to
);
605 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
609 write_branch_lookup_table(unsigned char *oview
)
611 for (typename
Branch_lookup_table::const_iterator p
612 = this->branch_lookup_table_
.begin();
613 p
!= this->branch_lookup_table_
.end();
616 elfcpp::Swap
<32, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
621 plt_thread_safe() const
622 { return this->plt_thread_safe_
; }
626 // The class which scans relocations.
630 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
633 : issued_non_pic_error_(false)
637 get_reference_flags(unsigned int r_type
);
640 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
641 Sized_relobj_file
<size
, big_endian
>* object
,
642 unsigned int data_shndx
,
643 Output_section
* output_section
,
644 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
645 const elfcpp::Sym
<size
, big_endian
>& lsym
,
649 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
650 Sized_relobj_file
<size
, big_endian
>* object
,
651 unsigned int data_shndx
,
652 Output_section
* output_section
,
653 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
657 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
659 Sized_relobj_file
<size
, big_endian
>* ,
662 const elfcpp::Rela
<size
, big_endian
>& ,
664 const elfcpp::Sym
<size
, big_endian
>&)
668 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
670 Sized_relobj_file
<size
, big_endian
>* ,
673 const elfcpp::Rela
<size
,
675 unsigned int , Symbol
*)
680 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
681 unsigned int r_type
);
684 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
685 unsigned int r_type
, Symbol
*);
688 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
689 Target_powerpc
* target
);
692 check_non_pic(Relobj
*, unsigned int r_type
);
695 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, big_endian
>* object
,
696 unsigned int r_type
);
698 // Whether we have issued an error about a non-PIC compilation.
699 bool issued_non_pic_error_
;
703 symval_for_branch(Address value
, const Sized_symbol
<size
>* gsym
,
704 Powerpc_relobj
<size
, big_endian
>* object
,
705 unsigned int *dest_shndx
);
707 // The class which implements relocation.
711 // Use 'at' branch hints when true, 'y' when false.
712 // FIXME maybe: set this with an option.
713 static const bool is_isa_v2
= true;
717 CALL_NOT_EXPECTED
= 0,
723 : call_tls_get_addr_(CALL_NOT_EXPECTED
)
728 if (this->call_tls_get_addr_
!= CALL_NOT_EXPECTED
)
730 // FIXME: This needs to specify the location somehow.
731 gold_error(_("missing expected __tls_get_addr call"));
735 // Do a relocation. Return false if the caller should not issue
736 // any warnings about this relocation.
738 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
739 Output_section
*, size_t relnum
,
740 const elfcpp::Rela
<size
, big_endian
>&,
741 unsigned int r_type
, const Sized_symbol
<size
>*,
742 const Symbol_value
<size
>*,
744 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
747 // This is set if we should skip the next reloc, which should be a
748 // call to __tls_get_addr.
749 enum skip_tls call_tls_get_addr_
;
752 class Relocate_comdat_behavior
755 // Decide what the linker should do for relocations that refer to
756 // discarded comdat sections.
757 inline Comdat_behavior
758 get(const char* name
)
760 gold::Default_comdat_behavior default_behavior
;
761 Comdat_behavior ret
= default_behavior
.get(name
);
762 if (ret
== CB_WARNING
)
765 && (strcmp(name
, ".fixup") == 0
766 || strcmp(name
, ".got2") == 0))
769 && (strcmp(name
, ".opd") == 0
770 || strcmp(name
, ".toc") == 0
771 || strcmp(name
, ".toc1") == 0))
778 // A class which returns the size required for a relocation type,
779 // used while scanning relocs during a relocatable link.
780 class Relocatable_size_for_reloc
784 get_size_for_reloc(unsigned int, Relobj
*)
791 // Optimize the TLS relocation type based on what we know about the
792 // symbol. IS_FINAL is true if the final address of this symbol is
793 // known at link time.
795 tls::Tls_optimization
796 optimize_tls_gd(bool is_final
)
798 // If we are generating a shared library, then we can't do anything
800 if (parameters
->options().shared())
801 return tls::TLSOPT_NONE
;
804 return tls::TLSOPT_TO_IE
;
805 return tls::TLSOPT_TO_LE
;
808 tls::Tls_optimization
811 if (parameters
->options().shared())
812 return tls::TLSOPT_NONE
;
814 return tls::TLSOPT_TO_LE
;
817 tls::Tls_optimization
818 optimize_tls_ie(bool is_final
)
820 if (!is_final
|| parameters
->options().shared())
821 return tls::TLSOPT_NONE
;
823 return tls::TLSOPT_TO_LE
;
828 make_glink_section(Layout
*);
830 // Create the PLT section.
832 make_plt_section(Symbol_table
*, Layout
*);
835 make_iplt_section(Symbol_table
*, Layout
*);
838 make_brlt_section(Layout
*);
840 // Create a PLT entry for a global symbol.
842 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
844 // Create a PLT entry for a local IFUNC symbol.
846 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
847 Sized_relobj_file
<size
, big_endian
>*,
851 // Create a GOT entry for local dynamic __tls_get_addr.
853 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
854 Sized_relobj_file
<size
, big_endian
>* object
);
857 tlsld_got_offset() const
859 return this->tlsld_got_offset_
;
862 // Get the dynamic reloc section, creating it if necessary.
864 rela_dyn_section(Layout
*);
866 // Copy a relocation against a global symbol.
868 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
869 Sized_relobj_file
<size
, big_endian
>* object
,
870 unsigned int shndx
, Output_section
* output_section
,
871 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
873 this->copy_relocs_
.copy_reloc(symtab
, layout
,
874 symtab
->get_sized_symbol
<size
>(sym
),
875 object
, shndx
, output_section
,
876 reloc
, this->rela_dyn_section(layout
));
879 // Look over all the input sections, deciding where to place stub.
881 group_sections(Layout
*, const Task
*);
883 // Sort output sections by address.
887 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
888 { return sec1
->address() < sec2
->address(); }
894 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
895 unsigned int data_shndx
,
900 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
901 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
907 // If this branch needs a plt call stub, or a long branch stub, make one.
909 make_stub(Stub_table
<size
, big_endian
>*,
910 Stub_table
<size
, big_endian
>*,
911 Symbol_table
*) const;
914 // The branch location..
915 Powerpc_relobj
<size
, big_endian
>* object_
;
918 // ..and the branch type and destination.
919 unsigned int r_type_
;
924 // Information about this specific target which we pass to the
925 // general Target structure.
926 static Target::Target_info powerpc_info
;
928 // The types of GOT entries needed for this platform.
929 // These values are exposed to the ABI in an incremental link.
930 // Do not renumber existing values without changing the version
931 // number of the .gnu_incremental_inputs section.
935 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
936 GOT_TYPE_DTPREL
, // entry for @got@dtprel
937 GOT_TYPE_TPREL
// entry for @got@tprel
941 Output_data_got_powerpc
<size
, big_endian
>* got_
;
943 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
945 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
946 // Section holding long branch destinations.
947 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
948 // The .glink section.
949 Output_data_glink
<size
, big_endian
>* glink_
;
950 // The dynamic reloc section.
951 Reloc_section
* rela_dyn_
;
952 // Relocs saved to avoid a COPY reloc.
953 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
954 // Space for variables copied with a COPY reloc.
955 Output_data_space
* dynbss_
;
956 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
957 unsigned int tlsld_got_offset_
;
959 Stub_tables stub_tables_
;
960 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
961 Branch_lookup_table branch_lookup_table_
;
963 typedef std::vector
<Branch_info
> Branches
;
964 Branches branch_info_
;
966 bool plt_thread_safe_
;
970 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
973 true, // is_big_endian
974 elfcpp::EM_PPC
, // machine_code
975 false, // has_make_symbol
976 false, // has_resolve
977 false, // has_code_fill
978 true, // is_default_stack_executable
979 false, // can_icf_inline_merge_sections
981 "/usr/lib/ld.so.1", // dynamic_linker
982 0x10000000, // default_text_segment_address
983 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
984 4 * 1024, // common_pagesize (overridable by -z common-page-size)
985 false, // isolate_execinstr
987 elfcpp::SHN_UNDEF
, // small_common_shndx
988 elfcpp::SHN_UNDEF
, // large_common_shndx
989 0, // small_common_section_flags
990 0, // large_common_section_flags
991 NULL
, // attributes_section
992 NULL
// attributes_vendor
996 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
999 false, // is_big_endian
1000 elfcpp::EM_PPC
, // machine_code
1001 false, // has_make_symbol
1002 false, // has_resolve
1003 false, // has_code_fill
1004 true, // is_default_stack_executable
1005 false, // can_icf_inline_merge_sections
1007 "/usr/lib/ld.so.1", // dynamic_linker
1008 0x10000000, // default_text_segment_address
1009 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1010 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1011 false, // isolate_execinstr
1013 elfcpp::SHN_UNDEF
, // small_common_shndx
1014 elfcpp::SHN_UNDEF
, // large_common_shndx
1015 0, // small_common_section_flags
1016 0, // large_common_section_flags
1017 NULL
, // attributes_section
1018 NULL
// attributes_vendor
1022 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1025 true, // is_big_endian
1026 elfcpp::EM_PPC64
, // machine_code
1027 false, // has_make_symbol
1028 false, // has_resolve
1029 false, // has_code_fill
1030 true, // is_default_stack_executable
1031 false, // can_icf_inline_merge_sections
1033 "/usr/lib/ld.so.1", // dynamic_linker
1034 0x10000000, // default_text_segment_address
1035 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1036 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1037 false, // isolate_execinstr
1039 elfcpp::SHN_UNDEF
, // small_common_shndx
1040 elfcpp::SHN_UNDEF
, // large_common_shndx
1041 0, // small_common_section_flags
1042 0, // large_common_section_flags
1043 NULL
, // attributes_section
1044 NULL
// attributes_vendor
1048 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1051 false, // is_big_endian
1052 elfcpp::EM_PPC64
, // machine_code
1053 false, // has_make_symbol
1054 false, // has_resolve
1055 false, // has_code_fill
1056 true, // is_default_stack_executable
1057 false, // can_icf_inline_merge_sections
1059 "/usr/lib/ld.so.1", // dynamic_linker
1060 0x10000000, // default_text_segment_address
1061 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1062 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1063 false, // isolate_execinstr
1065 elfcpp::SHN_UNDEF
, // small_common_shndx
1066 elfcpp::SHN_UNDEF
, // large_common_shndx
1067 0, // small_common_section_flags
1068 0, // large_common_section_flags
1069 NULL
, // attributes_section
1070 NULL
// attributes_vendor
1074 is_branch_reloc(unsigned int r_type
)
1076 return (r_type
== elfcpp::R_POWERPC_REL24
1077 || r_type
== elfcpp::R_PPC_PLTREL24
1078 || r_type
== elfcpp::R_PPC_LOCAL24PC
1079 || r_type
== elfcpp::R_POWERPC_REL14
1080 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1081 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1082 || r_type
== elfcpp::R_POWERPC_ADDR24
1083 || r_type
== elfcpp::R_POWERPC_ADDR14
1084 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1085 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1088 // If INSN is an opcode that may be used with an @tls operand, return
1089 // the transformed insn for TLS optimisation, otherwise return 0. If
1090 // REG is non-zero only match an insn with RB or RA equal to REG.
1092 at_tls_transform(uint32_t insn
, unsigned int reg
)
1094 if ((insn
& (0x3f << 26)) != 31 << 26)
1098 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1099 rtra
= insn
& ((1 << 26) - (1 << 16));
1100 else if (((insn
>> 16) & 0x1f) == reg
)
1101 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1105 if ((insn
& (0x3ff << 1)) == 266 << 1)
1108 else if ((insn
& (0x1f << 1)) == 23 << 1
1109 && ((insn
& (0x1f << 6)) < 14 << 6
1110 || ((insn
& (0x1f << 6)) >= 16 << 6
1111 && (insn
& (0x1f << 6)) < 24 << 6)))
1112 // load and store indexed -> dform
1113 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1114 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1115 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1116 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1117 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1119 insn
= (58 << 26) | 2;
1126 // Modified version of symtab.h class Symbol member
1127 // Given a direct absolute or pc-relative static relocation against
1128 // the global symbol, this function returns whether a dynamic relocation
1133 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
1135 // No dynamic relocations in a static link!
1136 if (parameters
->doing_static_link())
1139 // A reference to an undefined symbol from an executable should be
1140 // statically resolved to 0, and does not need a dynamic relocation.
1141 // This matches gnu ld behavior.
1142 if (gsym
->is_undefined() && !parameters
->options().shared())
1145 // A reference to an absolute symbol does not need a dynamic relocation.
1146 if (gsym
->is_absolute())
1149 // An absolute reference within a position-independent output file
1150 // will need a dynamic relocation.
1151 if ((flags
& Symbol::ABSOLUTE_REF
)
1152 && parameters
->options().output_is_position_independent())
1155 // A function call that can branch to a local PLT entry does not need
1156 // a dynamic relocation.
1157 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
1160 // A reference to any PLT entry in a non-position-independent executable
1161 // does not need a dynamic relocation.
1162 // Except due to having function descriptors on powerpc64 we don't define
1163 // functions to their plt code in an executable, so this doesn't apply.
1165 && !parameters
->options().output_is_position_independent()
1166 && gsym
->has_plt_offset())
1169 // A reference to a symbol defined in a dynamic object or to a
1170 // symbol that is preemptible will need a dynamic relocation.
1171 if (gsym
->is_from_dynobj()
1172 || gsym
->is_undefined()
1173 || gsym
->is_preemptible())
1176 // For all other cases, return FALSE.
1180 // Modified version of symtab.h class Symbol member
1181 // Whether we should use the PLT offset associated with a symbol for
1182 // a relocation. FLAGS is a set of Reference_flags.
1186 use_plt_offset(const Symbol
* gsym
, int flags
)
1188 // If the symbol doesn't have a PLT offset, then naturally we
1189 // don't want to use it.
1190 if (!gsym
->has_plt_offset())
1193 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1194 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1197 // If we are going to generate a dynamic relocation, then we will
1198 // wind up using that, so no need to use the PLT entry.
1199 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1202 // If the symbol is from a dynamic object, we need to use the PLT
1204 if (gsym
->is_from_dynobj())
1207 // If we are generating a shared object, and this symbol is
1208 // undefined or preemptible, we need to use the PLT entry.
1209 if (parameters
->options().shared()
1210 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1213 // If this is a call to a weak undefined symbol, we need to use
1214 // the PLT entry; the symbol may be defined by a library loaded
1216 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1219 // Otherwise we can use the regular definition.
1223 template<int size
, bool big_endian
>
1224 class Powerpc_relocate_functions
1241 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1242 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1244 template<int valsize
>
1246 has_overflow_signed(Address value
)
1248 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1249 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1250 limit
<<= ((valsize
- 1) >> 1);
1251 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1252 return value
+ limit
> (limit
<< 1) - 1;
1255 template<int valsize
>
1257 has_overflow_bitfield(Address value
)
1259 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1260 limit
<<= ((valsize
- 1) >> 1);
1261 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1262 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1265 template<int valsize
>
1266 static inline Status
1267 overflowed(Address value
, Overflow_check overflow
)
1269 if (overflow
== CHECK_SIGNED
)
1271 if (has_overflow_signed
<valsize
>(value
))
1272 return STATUS_OVERFLOW
;
1274 else if (overflow
== CHECK_BITFIELD
)
1276 if (has_overflow_bitfield
<valsize
>(value
))
1277 return STATUS_OVERFLOW
;
1282 // Do a simple RELA relocation
1283 template<int valsize
>
1284 static inline Status
1285 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1287 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1288 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1289 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1290 return overflowed
<valsize
>(value
, overflow
);
1293 template<int valsize
>
1294 static inline Status
1295 rela(unsigned char* view
,
1296 unsigned int right_shift
,
1297 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1299 Overflow_check overflow
)
1301 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1302 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1303 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1304 Valtype reloc
= value
>> right_shift
;
1307 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1308 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1311 // Do a simple RELA relocation, unaligned.
1312 template<int valsize
>
1313 static inline Status
1314 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1316 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1317 return overflowed
<valsize
>(value
, overflow
);
1320 template<int valsize
>
1321 static inline Status
1322 rela_ua(unsigned char* view
,
1323 unsigned int right_shift
,
1324 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1326 Overflow_check overflow
)
1328 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1330 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1331 Valtype reloc
= value
>> right_shift
;
1334 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1335 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1339 // R_PPC64_ADDR64: (Symbol + Addend)
1341 addr64(unsigned char* view
, Address value
)
1342 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1344 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1346 addr64_u(unsigned char* view
, Address value
)
1347 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1349 // R_POWERPC_ADDR32: (Symbol + Addend)
1350 static inline Status
1351 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1352 { return This::template rela
<32>(view
, value
, overflow
); }
1354 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1355 static inline Status
1356 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1357 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1359 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1360 static inline Status
1361 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1363 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1364 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1365 stat
= STATUS_OVERFLOW
;
1369 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1370 static inline Status
1371 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1372 { return This::template rela
<16>(view
, value
, overflow
); }
1374 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1375 static inline Status
1376 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1377 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1379 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1380 static inline Status
1381 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1383 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1384 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1385 stat
= STATUS_OVERFLOW
;
1389 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1391 addr16_hi(unsigned char* view
, Address value
)
1392 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1394 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1396 addr16_ha(unsigned char* view
, Address value
)
1397 { This::addr16_hi(view
, value
+ 0x8000); }
1399 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1401 addr16_hi2(unsigned char* view
, Address value
)
1402 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1404 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1406 addr16_ha2(unsigned char* view
, Address value
)
1407 { This::addr16_hi2(view
, value
+ 0x8000); }
1409 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1411 addr16_hi3(unsigned char* view
, Address value
)
1412 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1414 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1416 addr16_ha3(unsigned char* view
, Address value
)
1417 { This::addr16_hi3(view
, value
+ 0x8000); }
1419 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1420 static inline Status
1421 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1423 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1424 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1425 stat
= STATUS_OVERFLOW
;
1430 // Stash away the index of .got2 or .opd in a relocatable object, if
1431 // such a section exists.
1433 template<int size
, bool big_endian
>
1435 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1436 Read_symbols_data
* sd
)
1438 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1439 const unsigned char* namesu
= sd
->section_names
->data();
1440 const char* names
= reinterpret_cast<const char*>(namesu
);
1441 section_size_type names_size
= sd
->section_names_size
;
1442 const unsigned char* s
;
1444 s
= this->find_shdr(pshdrs
, size
== 32 ? ".got2" : ".opd",
1445 names
, names_size
, NULL
);
1448 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1449 this->special_
= ndx
;
1451 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1454 // Examine .rela.opd to build info about function entry points.
1456 template<int size
, bool big_endian
>
1458 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1460 const unsigned char* prelocs
,
1461 const unsigned char* plocal_syms
)
1465 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1467 const int reloc_size
1468 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1469 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1470 Address expected_off
= 0;
1471 bool regular
= true;
1472 unsigned int opd_ent_size
= 0;
1474 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1476 Reltype
reloc(prelocs
);
1477 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1478 = reloc
.get_r_info();
1479 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1480 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1482 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1483 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1486 if (r_sym
< this->local_symbol_count())
1488 typename
elfcpp::Sym
<size
, big_endian
>
1489 lsym(plocal_syms
+ r_sym
* sym_size
);
1490 shndx
= lsym
.get_st_shndx();
1491 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1492 value
= lsym
.get_st_value();
1495 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1497 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1498 value
+ reloc
.get_r_addend());
1501 expected_off
= reloc
.get_r_offset();
1502 opd_ent_size
= expected_off
;
1504 else if (expected_off
!= reloc
.get_r_offset())
1506 expected_off
+= opd_ent_size
;
1508 else if (r_type
== elfcpp::R_PPC64_TOC
)
1510 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1515 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1516 this->name().c_str(), r_type
);
1520 if (reloc_count
<= 2)
1521 opd_ent_size
= this->section_size(this->opd_shndx());
1522 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1526 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1527 this->name().c_str());
1533 template<int size
, bool big_endian
>
1535 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1537 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1540 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1541 p
!= rd
->relocs
.end();
1544 if (p
->data_shndx
== this->opd_shndx())
1546 uint64_t opd_size
= this->section_size(this->opd_shndx());
1547 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1550 this->init_opd(opd_size
);
1551 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1552 rd
->local_symbols
->data());
1560 // Set up some symbols.
1562 template<int size
, bool big_endian
>
1564 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1565 Symbol_table
* symtab
,
1570 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1571 // undefined when scanning relocs (and thus requires
1572 // non-relative dynamic relocs). The proper value will be
1574 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1575 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1577 Target_powerpc
<size
, big_endian
>* target
=
1578 static_cast<Target_powerpc
<size
, big_endian
>*>(
1579 parameters
->sized_target
<size
, big_endian
>());
1580 Output_data_got_powerpc
<size
, big_endian
>* got
1581 = target
->got_section(symtab
, layout
);
1582 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1583 Symbol_table::PREDEFINED
,
1587 elfcpp::STV_HIDDEN
, 0,
1591 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1592 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1593 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1595 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1597 = layout
->add_output_section_data(".sdata", 0,
1599 | elfcpp::SHF_WRITE
,
1600 sdata
, ORDER_SMALL_DATA
, false);
1601 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1602 Symbol_table::PREDEFINED
,
1603 os
, 32768, 0, elfcpp::STT_OBJECT
,
1604 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1610 // Set up PowerPC target specific relobj.
1612 template<int size
, bool big_endian
>
1614 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1615 const std::string
& name
,
1616 Input_file
* input_file
,
1617 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1619 int et
= ehdr
.get_e_type();
1620 // ET_EXEC files are valid input for --just-symbols/-R,
1621 // and we treat them as relocatable objects.
1622 if (et
== elfcpp::ET_REL
1623 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1625 Powerpc_relobj
<size
, big_endian
>* obj
=
1626 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1630 else if (et
== elfcpp::ET_DYN
)
1632 Sized_dynobj
<size
, big_endian
>* obj
=
1633 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1639 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1644 template<int size
, bool big_endian
>
1645 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1648 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1649 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1651 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1652 : Output_data_got
<size
, big_endian
>(),
1653 symtab_(symtab
), layout_(layout
),
1654 header_ent_cnt_(size
== 32 ? 3 : 1),
1655 header_index_(size
== 32 ? 0x2000 : 0)
1660 // Create a new GOT entry and return its offset.
1662 add_got_entry(Got_entry got_entry
)
1664 this->reserve_ent();
1665 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1668 // Create a pair of new GOT entries and return the offset of the first.
1670 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
1672 this->reserve_ent(2);
1673 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
1678 add_constant_pair(Valtype c1
, Valtype c2
)
1680 this->reserve_ent(2);
1681 unsigned int got_offset
= this->add_constant(c1
);
1682 this->add_constant(c2
);
1686 // Offset of _GLOBAL_OFFSET_TABLE_.
1690 return this->got_offset(this->header_index_
);
1693 // Offset of base used to access the GOT/TOC.
1694 // The got/toc pointer reg will be set to this value.
1696 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
1699 return this->g_o_t();
1701 return (this->output_section()->address()
1702 + object
->toc_base_offset()
1706 // Ensure our GOT has a header.
1708 set_final_data_size()
1710 if (this->header_ent_cnt_
!= 0)
1711 this->make_header();
1712 Output_data_got
<size
, big_endian
>::set_final_data_size();
1715 // First word of GOT header needs some values that are not
1716 // handled by Output_data_got so poke them in here.
1717 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1719 do_write(Output_file
* of
)
1722 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
1723 val
= this->layout_
->dynamic_section()->address();
1725 val
= this->output_section()->address() + 0x8000;
1726 this->replace_constant(this->header_index_
, val
);
1727 Output_data_got
<size
, big_endian
>::do_write(of
);
1732 reserve_ent(unsigned int cnt
= 1)
1734 if (this->header_ent_cnt_
== 0)
1736 if (this->num_entries() + cnt
> this->header_index_
)
1737 this->make_header();
1743 this->header_ent_cnt_
= 0;
1744 this->header_index_
= this->num_entries();
1747 Output_data_got
<size
, big_endian
>::add_constant(0);
1748 Output_data_got
<size
, big_endian
>::add_constant(0);
1749 Output_data_got
<size
, big_endian
>::add_constant(0);
1751 // Define _GLOBAL_OFFSET_TABLE_ at the header
1752 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1755 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
1756 sym
->set_value(this->g_o_t());
1759 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1760 Symbol_table::PREDEFINED
,
1761 this, this->g_o_t(), 0,
1764 elfcpp::STV_HIDDEN
, 0,
1768 Output_data_got
<size
, big_endian
>::add_constant(0);
1771 // Stashed pointers.
1772 Symbol_table
* symtab_
;
1776 unsigned int header_ent_cnt_
;
1777 // GOT header index.
1778 unsigned int header_index_
;
1781 // Get the GOT section, creating it if necessary.
1783 template<int size
, bool big_endian
>
1784 Output_data_got_powerpc
<size
, big_endian
>*
1785 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1788 if (this->got_
== NULL
)
1790 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1793 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1795 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1796 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1797 this->got_
, ORDER_DATA
, false);
1803 // Get the dynamic reloc section, creating it if necessary.
1805 template<int size
, bool big_endian
>
1806 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1807 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1809 if (this->rela_dyn_
== NULL
)
1811 gold_assert(layout
!= NULL
);
1812 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1813 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1814 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1815 ORDER_DYNAMIC_RELOCS
, false);
1817 return this->rela_dyn_
;
1823 // Determine the stub group size. The group size is the absolute
1824 // value of the parameter --stub-group-size. If --stub-group-size
1825 // is passed a negative value, we restrict stubs to be always before
1826 // the stubbed branches.
1827 Stub_control(int32_t size
)
1828 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
1829 stub14_group_size_(abs(size
)),
1830 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
1831 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
1833 if (stub_group_size_
== 1)
1836 if (stubs_always_before_branch_
)
1838 stub_group_size_
= 0x1e00000;
1839 stub14_group_size_
= 0x7800;
1843 stub_group_size_
= 0x1c00000;
1844 stub14_group_size_
= 0x7000;
1846 suppress_size_errors_
= true;
1850 // Return true iff input section can be handled by current stub
1853 can_add_to_stub_group(Output_section
* o
,
1854 const Output_section::Input_section
* i
,
1857 const Output_section::Input_section
*
1863 { return output_section_
; }
1869 FINDING_STUB_SECTION
,
1874 uint32_t stub_group_size_
;
1875 uint32_t stub14_group_size_
;
1876 bool stubs_always_before_branch_
;
1877 bool suppress_size_errors_
;
1878 uint64_t group_end_addr_
;
1879 const Output_section::Input_section
* owner_
;
1880 Output_section
* output_section_
;
1883 // Return true iff input section can be handled by current stub/
1887 Stub_control::can_add_to_stub_group(Output_section
* o
,
1888 const Output_section::Input_section
* i
,
1892 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
1893 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
1895 uint64_t start_addr
= o
->address();
1898 // .init and .fini sections are pasted together to form a single
1899 // function. We can't be adding stubs in the middle of the function.
1900 this_size
= o
->data_size();
1903 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
1904 this_size
= i
->data_size();
1906 uint64_t end_addr
= start_addr
+ this_size
;
1907 bool toobig
= this_size
> group_size
;
1909 if (toobig
&& !this->suppress_size_errors_
)
1910 gold_warning(_("%s:%s exceeds group size"),
1911 i
->relobj()->name().c_str(),
1912 i
->relobj()->section_name(i
->shndx()).c_str());
1914 if (this->state_
!= HAS_STUB_SECTION
1915 && (!whole_sec
|| this->output_section_
!= o
))
1918 this->output_section_
= o
;
1921 if (this->state_
== NO_GROUP
)
1923 this->state_
= FINDING_STUB_SECTION
;
1924 this->group_end_addr_
= end_addr
;
1926 else if (this->group_end_addr_
- start_addr
< group_size
)
1928 // Adding this section would make the group larger than GROUP_SIZE.
1929 else if (this->state_
== FINDING_STUB_SECTION
1930 && !this->stubs_always_before_branch_
1933 // But wait, there's more! Input sections up to GROUP_SIZE
1934 // bytes before the stub table can be handled by it too.
1935 this->state_
= HAS_STUB_SECTION
;
1936 this->group_end_addr_
= end_addr
;
1940 this->state_
= NO_GROUP
;
1946 // Look over all the input sections, deciding where to place stubs.
1948 template<int size
, bool big_endian
>
1950 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
1953 Stub_control
stub_control(parameters
->options().stub_group_size());
1955 // Group input sections and insert stub table
1956 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
1957 Layout::Section_list section_list
;
1958 layout
->get_executable_sections(§ion_list
);
1959 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
1960 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
1961 o
!= section_list
.rend();
1964 typedef Output_section::Input_section_list Input_section_list
;
1965 for (Input_section_list::const_reverse_iterator i
1966 = (*o
)->input_sections().rbegin();
1967 i
!= (*o
)->input_sections().rend();
1970 if (i
->is_input_section())
1972 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1973 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
1974 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
1975 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
1977 stub_table
->init(stub_control
.owner(),
1978 stub_control
.output_section());
1981 if (stub_table
== NULL
)
1982 stub_table
= this->new_stub_table();
1983 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
1987 if (stub_table
!= NULL
)
1988 stub_table
->init(stub_control
.owner(), stub_control
.output_section());
1991 // If this branch needs a plt call stub, or a long branch stub, make one.
1993 template<int size
, bool big_endian
>
1995 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
1996 Stub_table
<size
, big_endian
>* stub_table
,
1997 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
1998 Symbol_table
* symtab
) const
2000 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2001 if (sym
!= NULL
&& sym
->is_forwarder())
2002 sym
= symtab
->resolve_forwards(sym
);
2003 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2005 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(this->r_type_
))
2006 : this->object_
->local_has_plt_offset(this->r_sym_
))
2008 if (stub_table
== NULL
)
2009 stub_table
= this->object_
->stub_table(this->shndx_
);
2010 if (stub_table
== NULL
)
2012 // This is a ref from a data section to an ifunc symbol.
2013 stub_table
= ifunc_stub_table
;
2015 gold_assert(stub_table
!= NULL
);
2017 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2018 this->r_type_
, this->addend_
);
2020 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2021 this->r_type_
, this->addend_
);
2025 unsigned int max_branch_offset
;
2026 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2027 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2028 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2029 max_branch_offset
= 1 << 15;
2030 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2031 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2032 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2033 max_branch_offset
= 1 << 25;
2036 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2037 gold_assert(from
!= invalid_address
);
2038 from
+= (this->object_
->output_section(this->shndx_
)->address()
2043 switch (gsym
->source())
2045 case Symbol::FROM_OBJECT
:
2047 Object
* symobj
= gsym
->object();
2048 if (symobj
->is_dynamic()
2049 || symobj
->pluginobj() != NULL
)
2052 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2053 if (shndx
== elfcpp::SHN_UNDEF
)
2058 case Symbol::IS_UNDEFINED
:
2064 Symbol_table::Compute_final_value_status status
;
2065 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2066 if (status
!= Symbol_table::CFVS_OK
)
2071 const Symbol_value
<size
>* psymval
2072 = this->object_
->local_symbol(this->r_sym_
);
2073 Symbol_value
<size
> symval
;
2074 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2075 typename
ObjType::Compute_final_local_value_status status
2076 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2078 if (status
!= ObjType::CFLV_OK
2079 || !symval
.has_output_value())
2081 to
= symval
.value(this->object_
, 0);
2083 to
+= this->addend_
;
2084 if (stub_table
== NULL
)
2085 stub_table
= this->object_
->stub_table(this->shndx_
);
2086 gold_assert(stub_table
!= NULL
);
2087 if (size
== 64 && is_branch_reloc(this->r_type_
))
2089 unsigned int dest_shndx
;
2090 to
= stub_table
->targ()->symval_for_branch(to
, gsym
, this->object_
,
2093 Address delta
= to
- from
;
2094 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2096 stub_table
->add_long_branch_entry(this->object_
, to
);
2101 // Relaxation hook. This is where we do stub generation.
2103 template<int size
, bool big_endian
>
2105 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2106 const Input_objects
*,
2107 Symbol_table
* symtab
,
2111 unsigned int prev_brlt_size
= 0;
2114 bool thread_safe
= parameters
->options().plt_thread_safe();
2115 if (size
== 64 && !parameters
->options().user_set_plt_thread_safe())
2117 const char* const thread_starter
[] =
2121 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2123 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2124 "mq_notify", "create_timer",
2128 "GOMP_parallel_start",
2129 "GOMP_parallel_loop_static_start",
2130 "GOMP_parallel_loop_dynamic_start",
2131 "GOMP_parallel_loop_guided_start",
2132 "GOMP_parallel_loop_runtime_start",
2133 "GOMP_parallel_sections_start",
2136 for (unsigned int i
= 0;
2137 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2140 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2141 thread_safe
= sym
!= NULL
&& sym
->in_reg() && sym
->in_real_elf();
2146 this->plt_thread_safe_
= thread_safe
;
2147 this->group_sections(layout
, task
);
2150 // We need address of stub tables valid for make_stub.
2151 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2152 p
!= this->stub_tables_
.end();
2155 const Powerpc_relobj
<size
, big_endian
>* object
2156 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2157 Address off
= object
->get_output_section_offset((*p
)->shndx());
2158 gold_assert(off
!= invalid_address
);
2159 Output_section
* os
= (*p
)->output_section();
2160 (*p
)->set_address_and_size(os
, off
);
2165 // Clear plt call stubs, long branch stubs and branch lookup table.
2166 prev_brlt_size
= this->branch_lookup_table_
.size();
2167 this->branch_lookup_table_
.clear();
2168 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2169 p
!= this->stub_tables_
.end();
2172 (*p
)->clear_stubs();
2176 // Build all the stubs.
2177 Stub_table
<size
, big_endian
>* ifunc_stub_table
2178 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2179 Stub_table
<size
, big_endian
>* one_stub_table
2180 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2181 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2182 b
!= this->branch_info_
.end();
2185 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2188 // Did anything change size?
2189 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2190 bool again
= num_huge_branches
!= prev_brlt_size
;
2191 if (size
== 64 && num_huge_branches
!= 0)
2192 this->make_brlt_section(layout
);
2193 if (size
== 64 && again
)
2194 this->brlt_section_
->set_current_size(num_huge_branches
);
2196 typedef Unordered_set
<Output_section
*> Output_sections
;
2197 Output_sections os_need_update
;
2198 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2199 p
!= this->stub_tables_
.end();
2202 if ((*p
)->size_update())
2205 os_need_update
.insert((*p
)->output_section());
2209 // Set output section offsets for all input sections in an output
2210 // section that just changed size. Anything past the stubs will
2212 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2213 p
!= os_need_update
.end();
2216 Output_section
* os
= *p
;
2218 typedef Output_section::Input_section_list Input_section_list
;
2219 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2220 i
!= os
->input_sections().end();
2223 off
= align_address(off
, i
->addralign());
2224 if (i
->is_input_section() || i
->is_relaxed_input_section())
2225 i
->relobj()->set_section_offset(i
->shndx(), off
);
2226 if (i
->is_relaxed_input_section())
2228 Stub_table
<size
, big_endian
>* stub_table
2229 = static_cast<Stub_table
<size
, big_endian
>*>(
2230 i
->relaxed_input_section());
2231 off
+= stub_table
->set_address_and_size(os
, off
);
2234 off
+= i
->data_size();
2236 // If .brlt is part of this output section, then we have just
2237 // done the offset adjustment.
2238 os
->clear_section_offsets_need_adjustment();
2243 && num_huge_branches
!= 0
2244 && parameters
->options().output_is_position_independent())
2246 // Fill in the BRLT relocs.
2247 this->brlt_section_
->reset_data_size();
2248 for (typename
Branch_lookup_table::const_iterator p
2249 = this->branch_lookup_table_
.begin();
2250 p
!= this->branch_lookup_table_
.end();
2253 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2255 this->brlt_section_
->finalize_data_size();
2260 // A class to handle the PLT data.
2262 template<int size
, bool big_endian
>
2263 class Output_data_plt_powerpc
: public Output_section_data_build
2266 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2267 size
, big_endian
> Reloc_section
;
2269 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2270 Reloc_section
* plt_rel
,
2271 unsigned int reserved_size
,
2273 : Output_section_data_build(size
== 32 ? 4 : 8),
2276 initial_plt_entry_size_(reserved_size
),
2280 // Add an entry to the PLT.
2285 add_ifunc_entry(Symbol
*);
2288 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2290 // Return the .rela.plt section data.
2297 // Return the number of PLT entries.
2301 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2305 // Return the offset of the first non-reserved PLT entry.
2307 first_plt_entry_offset()
2308 { return this->initial_plt_entry_size_
; }
2310 // Return the size of a PLT entry.
2312 get_plt_entry_size()
2313 { return plt_entry_size
; }
2317 do_adjust_output_section(Output_section
* os
)
2322 // Write to a map file.
2324 do_print_to_mapfile(Mapfile
* mapfile
) const
2325 { mapfile
->print_output_data(this, this->name_
); }
2328 // The size of an entry in the PLT.
2329 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2331 // Write out the PLT data.
2333 do_write(Output_file
*);
2335 // The reloc section.
2336 Reloc_section
* rel_
;
2337 // Allows access to .glink for do_write.
2338 Target_powerpc
<size
, big_endian
>* targ_
;
2339 // The size of the first reserved entry.
2340 int initial_plt_entry_size_
;
2341 // What to report in map file.
2345 // Add an entry to the PLT.
2347 template<int size
, bool big_endian
>
2349 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2351 if (!gsym
->has_plt_offset())
2353 section_size_type off
= this->current_data_size();
2355 off
+= this->first_plt_entry_offset();
2356 gsym
->set_plt_offset(off
);
2357 gsym
->set_needs_dynsym_entry();
2358 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2359 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2360 off
+= plt_entry_size
;
2361 this->set_current_data_size(off
);
2365 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2367 template<int size
, bool big_endian
>
2369 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2371 if (!gsym
->has_plt_offset())
2373 section_size_type off
= this->current_data_size();
2374 gsym
->set_plt_offset(off
);
2375 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2377 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2378 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2379 off
+= plt_entry_size
;
2380 this->set_current_data_size(off
);
2384 // Add an entry for a local ifunc symbol to the IPLT.
2386 template<int size
, bool big_endian
>
2388 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2389 Sized_relobj_file
<size
, big_endian
>* relobj
,
2390 unsigned int local_sym_index
)
2392 if (!relobj
->local_has_plt_offset(local_sym_index
))
2394 section_size_type off
= this->current_data_size();
2395 relobj
->set_local_plt_offset(local_sym_index
, off
);
2396 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2398 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2399 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2401 off
+= plt_entry_size
;
2402 this->set_current_data_size(off
);
2406 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2407 static const uint32_t add_2_2_11
= 0x7c425a14;
2408 static const uint32_t add_3_3_2
= 0x7c631214;
2409 static const uint32_t add_3_3_13
= 0x7c636a14;
2410 static const uint32_t add_11_0_11
= 0x7d605a14;
2411 static const uint32_t add_12_2_11
= 0x7d825a14;
2412 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2413 static const uint32_t addi_11_11
= 0x396b0000;
2414 static const uint32_t addi_12_12
= 0x398c0000;
2415 static const uint32_t addi_2_2
= 0x38420000;
2416 static const uint32_t addi_3_2
= 0x38620000;
2417 static const uint32_t addi_3_3
= 0x38630000;
2418 static const uint32_t addis_0_2
= 0x3c020000;
2419 static const uint32_t addis_0_13
= 0x3c0d0000;
2420 static const uint32_t addis_11_11
= 0x3d6b0000;
2421 static const uint32_t addis_11_30
= 0x3d7e0000;
2422 static const uint32_t addis_12_12
= 0x3d8c0000;
2423 static const uint32_t addis_12_2
= 0x3d820000;
2424 static const uint32_t addis_3_2
= 0x3c620000;
2425 static const uint32_t addis_3_13
= 0x3c6d0000;
2426 static const uint32_t b
= 0x48000000;
2427 static const uint32_t bcl_20_31
= 0x429f0005;
2428 static const uint32_t bctr
= 0x4e800420;
2429 static const uint32_t blr
= 0x4e800020;
2430 static const uint32_t blrl
= 0x4e800021;
2431 static const uint32_t bnectr_p4
= 0x4ce20420;
2432 static const uint32_t cmpldi_2_0
= 0x28220000;
2433 static const uint32_t cror_15_15_15
= 0x4def7b82;
2434 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2435 static const uint32_t ld_0_1
= 0xe8010000;
2436 static const uint32_t ld_0_12
= 0xe80c0000;
2437 static const uint32_t ld_11_12
= 0xe96c0000;
2438 static const uint32_t ld_11_2
= 0xe9620000;
2439 static const uint32_t ld_2_1
= 0xe8410000;
2440 static const uint32_t ld_2_11
= 0xe84b0000;
2441 static const uint32_t ld_2_12
= 0xe84c0000;
2442 static const uint32_t ld_2_2
= 0xe8420000;
2443 static const uint32_t lfd_0_1
= 0xc8010000;
2444 static const uint32_t li_0_0
= 0x38000000;
2445 static const uint32_t li_12_0
= 0x39800000;
2446 static const uint32_t lis_0_0
= 0x3c000000;
2447 static const uint32_t lis_11
= 0x3d600000;
2448 static const uint32_t lis_12
= 0x3d800000;
2449 static const uint32_t lwz_0_12
= 0x800c0000;
2450 static const uint32_t lwz_11_11
= 0x816b0000;
2451 static const uint32_t lwz_11_30
= 0x817e0000;
2452 static const uint32_t lwz_12_12
= 0x818c0000;
2453 static const uint32_t lwzu_0_12
= 0x840c0000;
2454 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2455 static const uint32_t mflr_0
= 0x7c0802a6;
2456 static const uint32_t mflr_11
= 0x7d6802a6;
2457 static const uint32_t mflr_12
= 0x7d8802a6;
2458 static const uint32_t mtctr_0
= 0x7c0903a6;
2459 static const uint32_t mtctr_11
= 0x7d6903a6;
2460 static const uint32_t mtctr_12
= 0x7d8903a6;
2461 static const uint32_t mtlr_0
= 0x7c0803a6;
2462 static const uint32_t mtlr_12
= 0x7d8803a6;
2463 static const uint32_t nop
= 0x60000000;
2464 static const uint32_t ori_0_0_0
= 0x60000000;
2465 static const uint32_t std_0_1
= 0xf8010000;
2466 static const uint32_t std_0_12
= 0xf80c0000;
2467 static const uint32_t std_2_1
= 0xf8410000;
2468 static const uint32_t stfd_0_1
= 0xd8010000;
2469 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2470 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2471 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2473 // Write out the PLT.
2475 template<int size
, bool big_endian
>
2477 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2481 const section_size_type offset
= this->offset();
2482 const section_size_type oview_size
2483 = convert_to_section_size_type(this->data_size());
2484 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2485 unsigned char* pov
= oview
;
2486 unsigned char* endpov
= oview
+ oview_size
;
2488 // The address of the .glink branch table
2489 const Output_data_glink
<size
, big_endian
>* glink
2490 = this->targ_
->glink_section();
2491 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2493 while (pov
< endpov
)
2495 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2500 of
->write_output_view(offset
, oview_size
, oview
);
2504 // Create the PLT section.
2506 template<int size
, bool big_endian
>
2508 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2511 if (this->plt_
== NULL
)
2513 if (this->got_
== NULL
)
2514 this->got_section(symtab
, layout
);
2516 if (this->glink_
== NULL
)
2517 make_glink_section(layout
);
2519 // Ensure that .rela.dyn always appears before .rela.plt This is
2520 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2521 // needs to include .rela.plt in it's range.
2522 this->rela_dyn_section(layout
);
2524 Reloc_section
* plt_rel
= new Reloc_section(false);
2525 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2526 elfcpp::SHF_ALLOC
, plt_rel
,
2527 ORDER_DYNAMIC_PLT_RELOCS
, false);
2529 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2530 size
== 32 ? 0 : 24,
2532 layout
->add_output_section_data(".plt",
2534 ? elfcpp::SHT_PROGBITS
2535 : elfcpp::SHT_NOBITS
),
2536 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2545 // Create the IPLT section.
2547 template<int size
, bool big_endian
>
2549 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2552 if (this->iplt_
== NULL
)
2554 this->make_plt_section(symtab
, layout
);
2556 Reloc_section
* iplt_rel
= new Reloc_section(false);
2557 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2559 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2561 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
2565 // A section for huge long branch addresses, similar to plt section.
2567 template<int size
, bool big_endian
>
2568 class Output_data_brlt_powerpc
: public Output_section_data_build
2571 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2572 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2573 size
, big_endian
> Reloc_section
;
2575 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2576 Reloc_section
* brlt_rel
)
2577 : Output_section_data_build(size
== 32 ? 4 : 8),
2582 // Add a reloc for an entry in the BRLT.
2584 add_reloc(Address to
, unsigned int off
)
2585 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
2587 // Update section and reloc section size.
2589 set_current_size(unsigned int num_branches
)
2591 this->reset_address_and_file_offset();
2592 this->set_current_data_size(num_branches
* 16);
2593 this->finalize_data_size();
2594 Output_section
* os
= this->output_section();
2595 os
->set_section_offsets_need_adjustment();
2596 if (this->rel_
!= NULL
)
2598 unsigned int reloc_size
2599 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
2600 this->rel_
->reset_address_and_file_offset();
2601 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
2602 this->rel_
->finalize_data_size();
2603 Output_section
* os
= this->rel_
->output_section();
2604 os
->set_section_offsets_need_adjustment();
2610 do_adjust_output_section(Output_section
* os
)
2615 // Write to a map file.
2617 do_print_to_mapfile(Mapfile
* mapfile
) const
2618 { mapfile
->print_output_data(this, "** BRLT"); }
2621 // Write out the BRLT data.
2623 do_write(Output_file
*);
2625 // The reloc section.
2626 Reloc_section
* rel_
;
2627 Target_powerpc
<size
, big_endian
>* targ_
;
2630 // Make the branch lookup table section.
2632 template<int size
, bool big_endian
>
2634 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
2636 if (size
== 64 && this->brlt_section_
== NULL
)
2638 Reloc_section
* brlt_rel
= NULL
;
2639 bool is_pic
= parameters
->options().output_is_position_independent();
2642 // When PIC we can't fill in .brlt (like .plt it can be a
2643 // bss style section) but must initialise at runtime via
2644 // dynamic relocats.
2645 this->rela_dyn_section(layout
);
2646 brlt_rel
= new Reloc_section(false);
2647 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
2650 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
2651 if (this->plt_
&& is_pic
)
2652 this->plt_
->output_section()
2653 ->add_output_section_data(this->brlt_section_
);
2655 layout
->add_output_section_data(".brlt",
2656 (is_pic
? elfcpp::SHT_NOBITS
2657 : elfcpp::SHT_PROGBITS
),
2658 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2659 this->brlt_section_
,
2660 (is_pic
? ORDER_SMALL_BSS
2661 : ORDER_SMALL_DATA
),
2666 // Write out .brlt when non-PIC.
2668 template<int size
, bool big_endian
>
2670 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2672 if (size
== 64 && !parameters
->options().output_is_position_independent())
2674 const section_size_type offset
= this->offset();
2675 const section_size_type oview_size
2676 = convert_to_section_size_type(this->data_size());
2677 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2679 this->targ_
->write_branch_lookup_table(oview
);
2680 of
->write_output_view(offset
, oview_size
, oview
);
2684 static inline uint32_t
2690 static inline uint32_t
2696 static inline uint32_t
2699 return hi(a
+ 0x8000);
2702 template<bool big_endian
>
2704 write_insn(unsigned char* p
, uint32_t v
)
2706 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2709 // Stub_table holds information about plt and long branch stubs.
2710 // Stubs are built in an area following some input section determined
2711 // by group_sections(). This input section is converted to a relaxed
2712 // input section allowing it to be resized to accommodate the stubs
2714 template<int size
, bool big_endian
>
2715 class Stub_table
: public Output_relaxed_input_section
2718 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2719 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2721 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
2722 : Output_relaxed_input_section(NULL
, 0, 0),
2723 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
2724 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2725 branch_size_(0), last_branch_size_(0)
2728 // Delayed Output_relaxed_input_section init.
2730 init(const Output_section::Input_section
*, Output_section
*);
2732 // Add a plt call stub.
2734 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2740 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2745 // Find a given plt call stub.
2747 find_plt_call_entry(const Symbol
*) const;
2750 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2751 unsigned int) const;
2754 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2760 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2765 // Add a long branch stub.
2767 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2770 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2775 this->plt_call_stubs_
.clear();
2776 this->plt_size_
= 0;
2777 this->long_branch_stubs_
.clear();
2778 this->branch_size_
= 0;
2782 set_address_and_size(const Output_section
* os
, Address off
)
2784 Address start_off
= off
;
2785 off
+= this->orig_data_size_
;
2786 Address my_size
= this->plt_size_
+ this->branch_size_
;
2788 off
= align_address(off
, this->stub_align());
2789 // Include original section size and alignment padding in size
2790 my_size
+= off
- start_off
;
2791 this->reset_address_and_file_offset();
2792 this->set_current_data_size(my_size
);
2793 this->set_address_and_file_offset(os
->address() + start_off
,
2794 os
->offset() + start_off
);
2801 return align_address(this->address() + this->orig_data_size_
,
2802 this->stub_align());
2808 return align_address(this->offset() + this->orig_data_size_
,
2809 this->stub_align());
2814 { return this->plt_size_
; }
2819 Output_section
* os
= this->output_section();
2820 if (os
->addralign() < this->stub_align())
2822 os
->set_addralign(this->stub_align());
2823 // FIXME: get rid of the insane checkpointing.
2824 // We can't increase alignment of the input section to which
2825 // stubs are attached; The input section may be .init which
2826 // is pasted together with other .init sections to form a
2827 // function. Aligning might insert zero padding resulting in
2828 // sigill. However we do need to increase alignment of the
2829 // output section so that the align_address() on offset in
2830 // set_address_and_size() adds the same padding as the
2831 // align_address() on address in stub_address().
2832 // What's more, we need this alignment for the layout done in
2833 // relaxation_loop_body() so that the output section starts at
2834 // a suitably aligned address.
2835 os
->checkpoint_set_addralign(this->stub_align());
2837 if (this->last_plt_size_
!= this->plt_size_
2838 || this->last_branch_size_
!= this->branch_size_
)
2840 this->last_plt_size_
= this->plt_size_
;
2841 this->last_branch_size_
= this->branch_size_
;
2847 Target_powerpc
<size
, big_endian
>*
2853 class Plt_stub_ent_hash
;
2854 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
2855 Plt_stub_ent_hash
> Plt_stub_entries
;
2857 // Alignment of stub section.
2863 unsigned int min_align
= 32;
2864 unsigned int user_align
= 1 << parameters
->options().plt_align();
2865 return std::max(user_align
, min_align
);
2868 // Size of a given plt call stub.
2870 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
2875 Address pltaddr
= p
->second
;
2876 if (p
->first
.sym_
== NULL
2877 || (p
->first
.sym_
->type() == elfcpp::STT_GNU_IFUNC
2878 && p
->first
.sym_
->can_use_relative_reloc(false)))
2879 pltaddr
+= this->targ_
->iplt_section()->address();
2881 pltaddr
+= this->targ_
->plt_section()->address();
2882 Address tocbase
= this->targ_
->got_section()->output_section()->address();
2883 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2884 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
2885 tocbase
+= ppcobj
->toc_base_offset();
2886 Address off
= pltaddr
- tocbase
;
2887 bool static_chain
= parameters
->options().plt_static_chain();
2888 bool thread_safe
= this->targ_
->plt_thread_safe();
2889 unsigned int bytes
= (4 * 5
2892 + 4 * (ha(off
) != 0)
2893 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
2894 unsigned int align
= 1 << parameters
->options().plt_align();
2896 bytes
= (bytes
+ align
- 1) & -align
;
2900 // Return long branch stub size.
2902 branch_stub_size(Address to
)
2905 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
2906 if (to
- loc
+ (1 << 25) < 2 << 25)
2908 if (size
== 64 || !parameters
->options().output_is_position_independent())
2915 do_write(Output_file
*);
2917 // Plt call stub keys.
2921 Plt_stub_ent(const Symbol
* sym
)
2922 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2925 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2926 unsigned int locsym_index
)
2927 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2930 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2932 unsigned int r_type
,
2934 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2937 this->addend_
= addend
;
2938 else if (parameters
->options().output_is_position_independent()
2939 && r_type
== elfcpp::R_PPC_PLTREL24
)
2941 this->addend_
= addend
;
2942 if (this->addend_
>= 32768)
2943 this->object_
= object
;
2947 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2948 unsigned int locsym_index
,
2949 unsigned int r_type
,
2951 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2954 this->addend_
= addend
;
2955 else if (parameters
->options().output_is_position_independent()
2956 && r_type
== elfcpp::R_PPC_PLTREL24
)
2957 this->addend_
= addend
;
2960 bool operator==(const Plt_stub_ent
& that
) const
2962 return (this->sym_
== that
.sym_
2963 && this->object_
== that
.object_
2964 && this->addend_
== that
.addend_
2965 && this->locsym_
== that
.locsym_
);
2969 const Sized_relobj_file
<size
, big_endian
>* object_
;
2970 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
2971 unsigned int locsym_
;
2974 class Plt_stub_ent_hash
2977 size_t operator()(const Plt_stub_ent
& ent
) const
2979 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
2980 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
2986 // Long branch stub keys.
2987 class Branch_stub_ent
2990 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
2991 : dest_(to
), toc_base_off_(0)
2994 toc_base_off_
= obj
->toc_base_offset();
2997 bool operator==(const Branch_stub_ent
& that
) const
2999 return (this->dest_
== that
.dest_
3001 || this->toc_base_off_
== that
.toc_base_off_
));
3005 unsigned int toc_base_off_
;
3008 class Branch_stub_ent_hash
3011 size_t operator()(const Branch_stub_ent
& ent
) const
3012 { return ent
.dest_
^ ent
.toc_base_off_
; }
3015 // In a sane world this would be a global.
3016 Target_powerpc
<size
, big_endian
>* targ_
;
3017 // Map sym/object/addend to stub offset.
3018 Plt_stub_entries plt_call_stubs_
;
3019 // Map destination address to stub offset.
3020 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3021 Branch_stub_ent_hash
> Branch_stub_entries
;
3022 Branch_stub_entries long_branch_stubs_
;
3023 // size of input section
3024 section_size_type orig_data_size_
;
3026 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3029 // Make a new stub table, and record.
3031 template<int size
, bool big_endian
>
3032 Stub_table
<size
, big_endian
>*
3033 Target_powerpc
<size
, big_endian
>::new_stub_table()
3035 Stub_table
<size
, big_endian
>* stub_table
3036 = new Stub_table
<size
, big_endian
>(this);
3037 this->stub_tables_
.push_back(stub_table
);
3041 // Delayed stub table initialisation, because we create the stub table
3042 // before we know to which section it will be attached.
3044 template<int size
, bool big_endian
>
3046 Stub_table
<size
, big_endian
>::init(
3047 const Output_section::Input_section
* owner
,
3048 Output_section
* output_section
)
3050 this->set_relobj(owner
->relobj());
3051 this->set_shndx(owner
->shndx());
3052 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3053 this->set_output_section(output_section
);
3054 this->orig_data_size_
= owner
->current_data_size();
3056 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3057 new_relaxed
.push_back(this);
3058 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3061 // Add a plt call stub, if we do not already have one for this
3062 // sym/object/addend combo.
3064 template<int size
, bool big_endian
>
3066 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3067 const Sized_relobj_file
<size
, big_endian
>* object
,
3069 unsigned int r_type
,
3072 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3073 Address off
= this->plt_size_
;
3074 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3075 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3077 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3080 template<int size
, bool big_endian
>
3082 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3083 const Sized_relobj_file
<size
, big_endian
>* object
,
3084 unsigned int locsym_index
,
3085 unsigned int r_type
,
3088 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3089 Address off
= this->plt_size_
;
3090 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3091 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3093 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3096 // Find a plt call stub.
3098 template<int size
, bool big_endian
>
3099 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3100 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3101 const Sized_relobj_file
<size
, big_endian
>* object
,
3103 unsigned int r_type
,
3104 Address addend
) const
3106 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3107 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3108 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3111 template<int size
, bool big_endian
>
3112 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3113 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3115 Plt_stub_ent
ent(gsym
);
3116 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3117 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3120 template<int size
, bool big_endian
>
3121 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3122 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3123 const Sized_relobj_file
<size
, big_endian
>* object
,
3124 unsigned int locsym_index
,
3125 unsigned int r_type
,
3126 Address addend
) const
3128 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3129 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3130 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3133 template<int size
, bool big_endian
>
3134 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3135 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3136 const Sized_relobj_file
<size
, big_endian
>* object
,
3137 unsigned int locsym_index
) const
3139 Plt_stub_ent
ent(object
, locsym_index
);
3140 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3141 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3144 // Add a long branch stub if we don't already have one to given
3147 template<int size
, bool big_endian
>
3149 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3150 const Powerpc_relobj
<size
, big_endian
>* object
,
3153 Branch_stub_ent
ent(object
, to
);
3154 Address off
= this->branch_size_
;
3155 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3157 unsigned int stub_size
= this->branch_stub_size(to
);
3158 this->branch_size_
= off
+ stub_size
;
3159 if (size
== 64 && stub_size
!= 4)
3160 this->targ_
->add_branch_lookup_table(to
);
3164 // Find long branch stub.
3166 template<int size
, bool big_endian
>
3167 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3168 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3169 const Powerpc_relobj
<size
, big_endian
>* object
,
3172 Branch_stub_ent
ent(object
, to
);
3173 typename
Branch_stub_entries::const_iterator p
3174 = this->long_branch_stubs_
.find(ent
);
3175 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3178 // A class to handle .glink.
3180 template<int size
, bool big_endian
>
3181 class Output_data_glink
: public Output_section_data
3184 static const int pltresolve_size
= 16*4;
3186 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3187 : Output_section_data(16), targ_(targ
)
3191 // Write to a map file.
3193 do_print_to_mapfile(Mapfile
* mapfile
) const
3194 { mapfile
->print_output_data(this, _("** glink")); }
3198 set_final_data_size();
3202 do_write(Output_file
*);
3204 // Allows access to .got and .plt for do_write.
3205 Target_powerpc
<size
, big_endian
>* targ_
;
3208 template<int size
, bool big_endian
>
3210 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3212 unsigned int count
= this->targ_
->plt_entry_count();
3213 section_size_type total
= 0;
3219 // space for branch table
3220 total
+= 4 * (count
- 1);
3222 total
+= -total
& 15;
3223 total
+= this->pltresolve_size
;
3227 total
+= this->pltresolve_size
;
3229 // space for branch table
3232 total
+= 4 * (count
- 0x8000);
3236 this->set_data_size(total
);
3239 // Write out plt and long branch stub code.
3241 template<int size
, bool big_endian
>
3243 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3245 if (this->plt_call_stubs_
.empty()
3246 && this->long_branch_stubs_
.empty())
3249 const section_size_type start_off
= this->offset();
3250 const section_size_type off
= this->stub_offset();
3251 const section_size_type oview_size
=
3252 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3253 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3258 const Output_data_got_powerpc
<size
, big_endian
>* got
3259 = this->targ_
->got_section();
3260 Address got_os_addr
= got
->output_section()->address();
3262 if (!this->plt_call_stubs_
.empty())
3264 // The base address of the .plt section.
3265 Address plt_base
= this->targ_
->plt_section()->address();
3266 Address iplt_base
= invalid_address
;
3268 // Write out plt call stubs.
3269 typename
Plt_stub_entries::const_iterator cs
;
3270 for (cs
= this->plt_call_stubs_
.begin();
3271 cs
!= this->plt_call_stubs_
.end();
3276 const Symbol
* gsym
= cs
->first
.sym_
;
3279 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3280 && gsym
->can_use_relative_reloc(false));
3281 pltoff
= gsym
->plt_offset();
3286 const Sized_relobj_file
<size
, big_endian
>* relobj
3287 = cs
->first
.object_
;
3288 unsigned int local_sym_index
= cs
->first
.locsym_
;
3289 pltoff
= relobj
->local_plt_offset(local_sym_index
);
3291 Address plt_addr
= pltoff
;
3294 if (iplt_base
== invalid_address
)
3295 iplt_base
= this->targ_
->iplt_section()->address();
3296 plt_addr
+= iplt_base
;
3299 plt_addr
+= plt_base
;
3300 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3301 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3302 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3303 Address off
= plt_addr
- got_addr
;
3305 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3306 gold_error(_("%s: linkage table error against `%s'"),
3307 cs
->first
.object_
->name().c_str(),
3308 cs
->first
.sym_
->demangled_name().c_str());
3310 bool static_chain
= parameters
->options().plt_static_chain();
3311 bool thread_safe
= this->targ_
->plt_thread_safe();
3312 bool use_fake_dep
= false;
3313 Address cmp_branch_off
= 0;
3316 unsigned int pltindex
3317 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3318 / this->targ_
->plt_entry_size());
3320 = (this->targ_
->glink_section()->pltresolve_size
3322 if (pltindex
> 32768)
3323 glinkoff
+= (pltindex
- 32768) * 4;
3325 = this->targ_
->glink_section()->address() + glinkoff
;
3327 = (this->stub_address() + cs
->second
+ 24
3328 + 4 * (ha(off
) != 0)
3329 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3330 + 4 * static_chain
);
3331 cmp_branch_off
= to
- from
;
3332 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3335 p
= oview
+ cs
->second
;
3338 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3339 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3340 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3341 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3343 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3346 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3349 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3350 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3352 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3354 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3358 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3359 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3360 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3362 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3365 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3368 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3369 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3372 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3373 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3375 if (thread_safe
&& !use_fake_dep
)
3377 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3378 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3379 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3382 write_insn
<big_endian
>(p
, bctr
);
3386 // Write out long branch stubs.
3387 typename
Branch_stub_entries::const_iterator bs
;
3388 for (bs
= this->long_branch_stubs_
.begin();
3389 bs
!= this->long_branch_stubs_
.end();
3392 p
= oview
+ this->plt_size_
+ bs
->second
;
3393 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3394 Address delta
= bs
->first
.dest_
- loc
;
3395 if (delta
+ (1 << 25) < 2 << 25)
3396 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3400 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3401 gold_assert(brlt_addr
!= invalid_address
);
3402 brlt_addr
+= this->targ_
->brlt_section()->address();
3403 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3404 Address brltoff
= brlt_addr
- got_addr
;
3405 if (ha(brltoff
) == 0)
3407 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3411 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3412 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3414 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3415 write_insn
<big_endian
>(p
, bctr
);
3421 if (!this->plt_call_stubs_
.empty())
3423 // The base address of the .plt section.
3424 Address plt_base
= this->targ_
->plt_section()->address();
3425 Address iplt_base
= invalid_address
;
3426 // The address of _GLOBAL_OFFSET_TABLE_.
3427 Address g_o_t
= invalid_address
;
3429 // Write out plt call stubs.
3430 typename
Plt_stub_entries::const_iterator cs
;
3431 for (cs
= this->plt_call_stubs_
.begin();
3432 cs
!= this->plt_call_stubs_
.end();
3437 const Symbol
* gsym
= cs
->first
.sym_
;
3440 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3441 && gsym
->can_use_relative_reloc(false));
3442 plt_addr
= gsym
->plt_offset();
3447 const Sized_relobj_file
<size
, big_endian
>* relobj
3448 = cs
->first
.object_
;
3449 unsigned int local_sym_index
= cs
->first
.locsym_
;
3450 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
3454 if (iplt_base
== invalid_address
)
3455 iplt_base
= this->targ_
->iplt_section()->address();
3456 plt_addr
+= iplt_base
;
3459 plt_addr
+= plt_base
;
3461 p
= oview
+ cs
->second
;
3462 if (parameters
->options().output_is_position_independent())
3465 const Powerpc_relobj
<size
, big_endian
>* ppcobj
3466 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
3467 (cs
->first
.object_
));
3468 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
3470 unsigned int got2
= ppcobj
->got2_shndx();
3471 got_addr
= ppcobj
->get_output_section_offset(got2
);
3472 gold_assert(got_addr
!= invalid_address
);
3473 got_addr
+= (ppcobj
->output_section(got2
)->address()
3474 + cs
->first
.addend_
);
3478 if (g_o_t
== invalid_address
)
3480 const Output_data_got_powerpc
<size
, big_endian
>* got
3481 = this->targ_
->got_section();
3482 g_o_t
= got
->address() + got
->g_o_t();
3487 Address off
= plt_addr
- got_addr
;
3490 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
3491 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
3492 write_insn
<big_endian
>(p
+ 8, bctr
);
3496 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
3497 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
3498 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3499 write_insn
<big_endian
>(p
+ 12, bctr
);
3504 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
3505 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
3506 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3507 write_insn
<big_endian
>(p
+ 12, bctr
);
3512 // Write out long branch stubs.
3513 typename
Branch_stub_entries::const_iterator bs
;
3514 for (bs
= this->long_branch_stubs_
.begin();
3515 bs
!= this->long_branch_stubs_
.end();
3518 p
= oview
+ this->plt_size_
+ bs
->second
;
3519 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3520 Address delta
= bs
->first
.dest_
- loc
;
3521 if (delta
+ (1 << 25) < 2 << 25)
3522 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3523 else if (!parameters
->options().output_is_position_independent())
3525 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
3526 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
3527 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
3528 write_insn
<big_endian
>(p
+ 12, bctr
);
3533 write_insn
<big_endian
>(p
+ 0, mflr_0
);
3534 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
3535 write_insn
<big_endian
>(p
+ 8, mflr_12
);
3536 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
3537 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
3538 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3539 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
3540 write_insn
<big_endian
>(p
+ 28, bctr
);
3546 // Write out .glink.
3548 template<int size
, bool big_endian
>
3550 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
3552 const section_size_type off
= this->offset();
3553 const section_size_type oview_size
=
3554 convert_to_section_size_type(this->data_size());
3555 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3558 // The base address of the .plt section.
3559 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3560 Address plt_base
= this->targ_
->plt_section()->address();
3564 // Write pltresolve stub.
3566 Address after_bcl
= this->address() + 16;
3567 Address pltoff
= plt_base
- after_bcl
;
3569 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
3571 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
3572 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
3573 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
3574 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
3575 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
3576 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
3577 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
3578 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
3579 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3580 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
3581 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
3582 while (p
< oview
+ this->pltresolve_size
)
3583 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3585 // Write lazy link call stubs.
3587 while (p
< oview
+ oview_size
)
3591 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
3595 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
3596 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
3598 uint32_t branch_off
= 8 - (p
- oview
);
3599 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
3605 const Output_data_got_powerpc
<size
, big_endian
>* got
3606 = this->targ_
->got_section();
3607 // The address of _GLOBAL_OFFSET_TABLE_.
3608 Address g_o_t
= got
->address() + got
->g_o_t();
3610 // Write out pltresolve branch table.
3612 unsigned int the_end
= oview_size
- this->pltresolve_size
;
3613 unsigned char* end_p
= oview
+ the_end
;
3614 while (p
< end_p
- 8 * 4)
3615 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
3617 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3619 // Write out pltresolve call stub.
3620 if (parameters
->options().output_is_position_independent())
3622 Address res0_off
= 0;
3623 Address after_bcl_off
= the_end
+ 12;
3624 Address bcl_res0
= after_bcl_off
- res0_off
;
3626 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
3627 write_insn
<big_endian
>(p
+ 4, mflr_0
);
3628 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
3629 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
3630 write_insn
<big_endian
>(p
+ 16, mflr_12
);
3631 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3632 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
3634 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
3636 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
3637 if (ha(got_bcl
) == ha(got_bcl
+ 4))
3639 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
3640 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
3644 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
3645 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
3647 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
3648 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
3649 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
3650 write_insn
<big_endian
>(p
+ 52, bctr
);
3651 write_insn
<big_endian
>(p
+ 56, nop
);
3652 write_insn
<big_endian
>(p
+ 60, nop
);
3656 Address res0
= this->address();
3658 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
3659 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
3660 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3661 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
3663 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
3664 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
3665 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
3666 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
3667 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3668 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
3670 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
3671 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
3672 write_insn
<big_endian
>(p
+ 32, bctr
);
3673 write_insn
<big_endian
>(p
+ 36, nop
);
3674 write_insn
<big_endian
>(p
+ 40, nop
);
3675 write_insn
<big_endian
>(p
+ 44, nop
);
3676 write_insn
<big_endian
>(p
+ 48, nop
);
3677 write_insn
<big_endian
>(p
+ 52, nop
);
3678 write_insn
<big_endian
>(p
+ 56, nop
);
3679 write_insn
<big_endian
>(p
+ 60, nop
);
3684 of
->write_output_view(off
, oview_size
, oview
);
3688 // A class to handle linker generated save/restore functions.
3690 template<int size
, bool big_endian
>
3691 class Output_data_save_res
: public Output_section_data_build
3694 Output_data_save_res(Symbol_table
* symtab
);
3697 // Write to a map file.
3699 do_print_to_mapfile(Mapfile
* mapfile
) const
3700 { mapfile
->print_output_data(this, _("** save/restore")); }
3703 do_write(Output_file
*);
3706 // The maximum size of save/restore contents.
3707 static const unsigned int savres_max
= 218*4;
3710 savres_define(Symbol_table
* symtab
,
3712 unsigned int lo
, unsigned int hi
,
3713 unsigned char* write_ent(unsigned char*, int),
3714 unsigned char* write_tail(unsigned char*, int));
3716 unsigned char *contents_
;
3719 template<bool big_endian
>
3720 static unsigned char*
3721 savegpr0(unsigned char* p
, int r
)
3723 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3724 write_insn
<big_endian
>(p
, insn
);
3728 template<bool big_endian
>
3729 static unsigned char*
3730 savegpr0_tail(unsigned char* p
, int r
)
3732 p
= savegpr0
<big_endian
>(p
, r
);
3733 uint32_t insn
= std_0_1
+ 16;
3734 write_insn
<big_endian
>(p
, insn
);
3736 write_insn
<big_endian
>(p
, blr
);
3740 template<bool big_endian
>
3741 static unsigned char*
3742 restgpr0(unsigned char* p
, int r
)
3744 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3745 write_insn
<big_endian
>(p
, insn
);
3749 template<bool big_endian
>
3750 static unsigned char*
3751 restgpr0_tail(unsigned char* p
, int r
)
3753 uint32_t insn
= ld_0_1
+ 16;
3754 write_insn
<big_endian
>(p
, insn
);
3756 p
= restgpr0
<big_endian
>(p
, r
);
3757 write_insn
<big_endian
>(p
, mtlr_0
);
3761 p
= restgpr0
<big_endian
>(p
, 30);
3762 p
= restgpr0
<big_endian
>(p
, 31);
3764 write_insn
<big_endian
>(p
, blr
);
3768 template<bool big_endian
>
3769 static unsigned char*
3770 savegpr1(unsigned char* p
, int r
)
3772 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3773 write_insn
<big_endian
>(p
, insn
);
3777 template<bool big_endian
>
3778 static unsigned char*
3779 savegpr1_tail(unsigned char* p
, int r
)
3781 p
= savegpr1
<big_endian
>(p
, r
);
3782 write_insn
<big_endian
>(p
, blr
);
3786 template<bool big_endian
>
3787 static unsigned char*
3788 restgpr1(unsigned char* p
, int r
)
3790 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3791 write_insn
<big_endian
>(p
, insn
);
3795 template<bool big_endian
>
3796 static unsigned char*
3797 restgpr1_tail(unsigned char* p
, int r
)
3799 p
= restgpr1
<big_endian
>(p
, r
);
3800 write_insn
<big_endian
>(p
, blr
);
3804 template<bool big_endian
>
3805 static unsigned char*
3806 savefpr(unsigned char* p
, int r
)
3808 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3809 write_insn
<big_endian
>(p
, insn
);
3813 template<bool big_endian
>
3814 static unsigned char*
3815 savefpr0_tail(unsigned char* p
, int r
)
3817 p
= savefpr
<big_endian
>(p
, r
);
3818 write_insn
<big_endian
>(p
, std_0_1
+ 16);
3820 write_insn
<big_endian
>(p
, blr
);
3824 template<bool big_endian
>
3825 static unsigned char*
3826 restfpr(unsigned char* p
, int r
)
3828 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3829 write_insn
<big_endian
>(p
, insn
);
3833 template<bool big_endian
>
3834 static unsigned char*
3835 restfpr0_tail(unsigned char* p
, int r
)
3837 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
3839 p
= restfpr
<big_endian
>(p
, r
);
3840 write_insn
<big_endian
>(p
, mtlr_0
);
3844 p
= restfpr
<big_endian
>(p
, 30);
3845 p
= restfpr
<big_endian
>(p
, 31);
3847 write_insn
<big_endian
>(p
, blr
);
3851 template<bool big_endian
>
3852 static unsigned char*
3853 savefpr1_tail(unsigned char* p
, int r
)
3855 p
= savefpr
<big_endian
>(p
, r
);
3856 write_insn
<big_endian
>(p
, blr
);
3860 template<bool big_endian
>
3861 static unsigned char*
3862 restfpr1_tail(unsigned char* p
, int r
)
3864 p
= restfpr
<big_endian
>(p
, r
);
3865 write_insn
<big_endian
>(p
, blr
);
3869 template<bool big_endian
>
3870 static unsigned char*
3871 savevr(unsigned char* p
, int r
)
3873 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3874 write_insn
<big_endian
>(p
, insn
);
3876 insn
= stvx_0_12_0
+ (r
<< 21);
3877 write_insn
<big_endian
>(p
, insn
);
3881 template<bool big_endian
>
3882 static unsigned char*
3883 savevr_tail(unsigned char* p
, int r
)
3885 p
= savevr
<big_endian
>(p
, r
);
3886 write_insn
<big_endian
>(p
, blr
);
3890 template<bool big_endian
>
3891 static unsigned char*
3892 restvr(unsigned char* p
, int r
)
3894 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3895 write_insn
<big_endian
>(p
, insn
);
3897 insn
= lvx_0_12_0
+ (r
<< 21);
3898 write_insn
<big_endian
>(p
, insn
);
3902 template<bool big_endian
>
3903 static unsigned char*
3904 restvr_tail(unsigned char* p
, int r
)
3906 p
= restvr
<big_endian
>(p
, r
);
3907 write_insn
<big_endian
>(p
, blr
);
3912 template<int size
, bool big_endian
>
3913 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
3914 Symbol_table
* symtab
)
3915 : Output_section_data_build(4),
3918 this->savres_define(symtab
,
3919 "_savegpr0_", 14, 31,
3920 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
3921 this->savres_define(symtab
,
3922 "_restgpr0_", 14, 29,
3923 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3924 this->savres_define(symtab
,
3925 "_restgpr0_", 30, 31,
3926 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3927 this->savres_define(symtab
,
3928 "_savegpr1_", 14, 31,
3929 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
3930 this->savres_define(symtab
,
3931 "_restgpr1_", 14, 31,
3932 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
3933 this->savres_define(symtab
,
3934 "_savefpr_", 14, 31,
3935 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
3936 this->savres_define(symtab
,
3937 "_restfpr_", 14, 29,
3938 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
3939 this->savres_define(symtab
,
3940 "_restfpr_", 30, 31,
3941 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
3942 this->savres_define(symtab
,
3944 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
3945 this->savres_define(symtab
,
3947 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
3948 this->savres_define(symtab
,
3950 savevr
<big_endian
>, savevr_tail
<big_endian
>);
3951 this->savres_define(symtab
,
3953 restvr
<big_endian
>, restvr_tail
<big_endian
>);
3956 template<int size
, bool big_endian
>
3958 Output_data_save_res
<size
, big_endian
>::savres_define(
3959 Symbol_table
* symtab
,
3961 unsigned int lo
, unsigned int hi
,
3962 unsigned char* write_ent(unsigned char*, int),
3963 unsigned char* write_tail(unsigned char*, int))
3965 size_t len
= strlen(name
);
3966 bool writing
= false;
3969 memcpy(sym
, name
, len
);
3972 for (unsigned int i
= lo
; i
<= hi
; i
++)
3974 sym
[len
+ 0] = i
/ 10 + '0';
3975 sym
[len
+ 1] = i
% 10 + '0';
3976 Symbol
* gsym
= symtab
->lookup(sym
);
3977 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
3978 writing
= writing
|| refd
;
3981 if (this->contents_
== NULL
)
3982 this->contents_
= new unsigned char[this->savres_max
];
3984 section_size_type value
= this->current_data_size();
3985 unsigned char* p
= this->contents_
+ value
;
3987 p
= write_ent(p
, i
);
3989 p
= write_tail(p
, i
);
3990 section_size_type cur_size
= p
- this->contents_
;
3991 this->set_current_data_size(cur_size
);
3993 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
3994 this, value
, cur_size
- value
,
3995 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
3996 elfcpp::STV_HIDDEN
, 0, false, false);
4001 // Write out save/restore.
4003 template<int size
, bool big_endian
>
4005 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4007 const section_size_type off
= this->offset();
4008 const section_size_type oview_size
=
4009 convert_to_section_size_type(this->data_size());
4010 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4011 memcpy(oview
, this->contents_
, oview_size
);
4012 of
->write_output_view(off
, oview_size
, oview
);
4016 // Create the glink section.
4018 template<int size
, bool big_endian
>
4020 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4022 if (this->glink_
== NULL
)
4024 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4025 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4026 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4027 this->glink_
, ORDER_TEXT
, false);
4031 // Create a PLT entry for a global symbol.
4033 template<int size
, bool big_endian
>
4035 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4039 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4040 && gsym
->can_use_relative_reloc(false))
4042 if (this->iplt_
== NULL
)
4043 this->make_iplt_section(symtab
, layout
);
4044 this->iplt_
->add_ifunc_entry(gsym
);
4048 if (this->plt_
== NULL
)
4049 this->make_plt_section(symtab
, layout
);
4050 this->plt_
->add_entry(gsym
);
4054 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4056 template<int size
, bool big_endian
>
4058 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4059 Symbol_table
* symtab
,
4061 Sized_relobj_file
<size
, big_endian
>* relobj
,
4064 if (this->iplt_
== NULL
)
4065 this->make_iplt_section(symtab
, layout
);
4066 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4069 // Return the number of entries in the PLT.
4071 template<int size
, bool big_endian
>
4073 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4075 if (this->plt_
== NULL
)
4077 unsigned int count
= this->plt_
->entry_count();
4078 if (this->iplt_
!= NULL
)
4079 count
+= this->iplt_
->entry_count();
4083 // Return the offset of the first non-reserved PLT entry.
4085 template<int size
, bool big_endian
>
4087 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4089 return this->plt_
->first_plt_entry_offset();
4092 // Return the size of each PLT entry.
4094 template<int size
, bool big_endian
>
4096 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4098 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4101 // Create a GOT entry for local dynamic __tls_get_addr calls.
4103 template<int size
, bool big_endian
>
4105 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4106 Symbol_table
* symtab
,
4108 Sized_relobj_file
<size
, big_endian
>* object
)
4110 if (this->tlsld_got_offset_
== -1U)
4112 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4113 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4114 Output_data_got_powerpc
<size
, big_endian
>* got
4115 = this->got_section(symtab
, layout
);
4116 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4117 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4119 this->tlsld_got_offset_
= got_offset
;
4121 return this->tlsld_got_offset_
;
4124 // Get the Reference_flags for a particular relocation.
4126 template<int size
, bool big_endian
>
4128 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4132 case elfcpp::R_POWERPC_NONE
:
4133 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4134 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4135 case elfcpp::R_PPC64_TOC
:
4136 // No symbol reference.
4139 case elfcpp::R_PPC64_ADDR64
:
4140 case elfcpp::R_PPC64_UADDR64
:
4141 case elfcpp::R_POWERPC_ADDR32
:
4142 case elfcpp::R_POWERPC_UADDR32
:
4143 case elfcpp::R_POWERPC_ADDR16
:
4144 case elfcpp::R_POWERPC_UADDR16
:
4145 case elfcpp::R_POWERPC_ADDR16_LO
:
4146 case elfcpp::R_POWERPC_ADDR16_HI
:
4147 case elfcpp::R_POWERPC_ADDR16_HA
:
4148 return Symbol::ABSOLUTE_REF
;
4150 case elfcpp::R_POWERPC_ADDR24
:
4151 case elfcpp::R_POWERPC_ADDR14
:
4152 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4153 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4154 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4156 case elfcpp::R_PPC64_REL64
:
4157 case elfcpp::R_POWERPC_REL32
:
4158 case elfcpp::R_PPC_LOCAL24PC
:
4159 case elfcpp::R_POWERPC_REL16
:
4160 case elfcpp::R_POWERPC_REL16_LO
:
4161 case elfcpp::R_POWERPC_REL16_HI
:
4162 case elfcpp::R_POWERPC_REL16_HA
:
4163 return Symbol::RELATIVE_REF
;
4165 case elfcpp::R_POWERPC_REL24
:
4166 case elfcpp::R_PPC_PLTREL24
:
4167 case elfcpp::R_POWERPC_REL14
:
4168 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4169 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4170 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4172 case elfcpp::R_POWERPC_GOT16
:
4173 case elfcpp::R_POWERPC_GOT16_LO
:
4174 case elfcpp::R_POWERPC_GOT16_HI
:
4175 case elfcpp::R_POWERPC_GOT16_HA
:
4176 case elfcpp::R_PPC64_GOT16_DS
:
4177 case elfcpp::R_PPC64_GOT16_LO_DS
:
4178 case elfcpp::R_PPC64_TOC16
:
4179 case elfcpp::R_PPC64_TOC16_LO
:
4180 case elfcpp::R_PPC64_TOC16_HI
:
4181 case elfcpp::R_PPC64_TOC16_HA
:
4182 case elfcpp::R_PPC64_TOC16_DS
:
4183 case elfcpp::R_PPC64_TOC16_LO_DS
:
4185 return Symbol::ABSOLUTE_REF
;
4187 case elfcpp::R_POWERPC_GOT_TPREL16
:
4188 case elfcpp::R_POWERPC_TLS
:
4189 return Symbol::TLS_REF
;
4191 case elfcpp::R_POWERPC_COPY
:
4192 case elfcpp::R_POWERPC_GLOB_DAT
:
4193 case elfcpp::R_POWERPC_JMP_SLOT
:
4194 case elfcpp::R_POWERPC_RELATIVE
:
4195 case elfcpp::R_POWERPC_DTPMOD
:
4197 // Not expected. We will give an error later.
4202 // Report an unsupported relocation against a local symbol.
4204 template<int size
, bool big_endian
>
4206 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4207 Sized_relobj_file
<size
, big_endian
>* object
,
4208 unsigned int r_type
)
4210 gold_error(_("%s: unsupported reloc %u against local symbol"),
4211 object
->name().c_str(), r_type
);
4214 // We are about to emit a dynamic relocation of type R_TYPE. If the
4215 // dynamic linker does not support it, issue an error.
4217 template<int size
, bool big_endian
>
4219 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4220 unsigned int r_type
)
4222 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4224 // These are the relocation types supported by glibc for both 32-bit
4225 // and 64-bit powerpc.
4228 case elfcpp::R_POWERPC_NONE
:
4229 case elfcpp::R_POWERPC_RELATIVE
:
4230 case elfcpp::R_POWERPC_GLOB_DAT
:
4231 case elfcpp::R_POWERPC_DTPMOD
:
4232 case elfcpp::R_POWERPC_DTPREL
:
4233 case elfcpp::R_POWERPC_TPREL
:
4234 case elfcpp::R_POWERPC_JMP_SLOT
:
4235 case elfcpp::R_POWERPC_COPY
:
4236 case elfcpp::R_POWERPC_IRELATIVE
:
4237 case elfcpp::R_POWERPC_ADDR32
:
4238 case elfcpp::R_POWERPC_UADDR32
:
4239 case elfcpp::R_POWERPC_ADDR24
:
4240 case elfcpp::R_POWERPC_ADDR16
:
4241 case elfcpp::R_POWERPC_UADDR16
:
4242 case elfcpp::R_POWERPC_ADDR16_LO
:
4243 case elfcpp::R_POWERPC_ADDR16_HI
:
4244 case elfcpp::R_POWERPC_ADDR16_HA
:
4245 case elfcpp::R_POWERPC_ADDR14
:
4246 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4247 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4248 case elfcpp::R_POWERPC_REL32
:
4249 case elfcpp::R_POWERPC_REL24
:
4250 case elfcpp::R_POWERPC_TPREL16
:
4251 case elfcpp::R_POWERPC_TPREL16_LO
:
4252 case elfcpp::R_POWERPC_TPREL16_HI
:
4253 case elfcpp::R_POWERPC_TPREL16_HA
:
4264 // These are the relocation types supported only on 64-bit.
4265 case elfcpp::R_PPC64_ADDR64
:
4266 case elfcpp::R_PPC64_UADDR64
:
4267 case elfcpp::R_PPC64_JMP_IREL
:
4268 case elfcpp::R_PPC64_ADDR16_DS
:
4269 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4270 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4271 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4272 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4273 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4274 case elfcpp::R_PPC64_REL64
:
4275 case elfcpp::R_POWERPC_ADDR30
:
4276 case elfcpp::R_PPC64_TPREL16_DS
:
4277 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4278 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4279 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4280 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4281 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4292 // These are the relocation types supported only on 32-bit.
4293 // ??? glibc ld.so doesn't need to support these.
4294 case elfcpp::R_POWERPC_DTPREL16
:
4295 case elfcpp::R_POWERPC_DTPREL16_LO
:
4296 case elfcpp::R_POWERPC_DTPREL16_HI
:
4297 case elfcpp::R_POWERPC_DTPREL16_HA
:
4305 // This prevents us from issuing more than one error per reloc
4306 // section. But we can still wind up issuing more than one
4307 // error per object file.
4308 if (this->issued_non_pic_error_
)
4310 gold_assert(parameters
->options().output_is_position_independent());
4311 object
->error(_("requires unsupported dynamic reloc; "
4312 "recompile with -fPIC"));
4313 this->issued_non_pic_error_
= true;
4317 // Return whether we need to make a PLT entry for a relocation of the
4318 // given type against a STT_GNU_IFUNC symbol.
4320 template<int size
, bool big_endian
>
4322 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4323 Sized_relobj_file
<size
, big_endian
>* object
,
4324 unsigned int r_type
)
4326 // In non-pic code any reference will resolve to the plt call stub
4327 // for the ifunc symbol.
4328 if (size
== 32 && !parameters
->options().output_is_position_independent())
4333 // Word size refs from data sections are OK.
4334 case elfcpp::R_POWERPC_ADDR32
:
4335 case elfcpp::R_POWERPC_UADDR32
:
4340 case elfcpp::R_PPC64_ADDR64
:
4341 case elfcpp::R_PPC64_UADDR64
:
4346 // GOT refs are good.
4347 case elfcpp::R_POWERPC_GOT16
:
4348 case elfcpp::R_POWERPC_GOT16_LO
:
4349 case elfcpp::R_POWERPC_GOT16_HI
:
4350 case elfcpp::R_POWERPC_GOT16_HA
:
4351 case elfcpp::R_PPC64_GOT16_DS
:
4352 case elfcpp::R_PPC64_GOT16_LO_DS
:
4355 // So are function calls.
4356 case elfcpp::R_POWERPC_ADDR24
:
4357 case elfcpp::R_POWERPC_ADDR14
:
4358 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4359 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4360 case elfcpp::R_POWERPC_REL24
:
4361 case elfcpp::R_PPC_PLTREL24
:
4362 case elfcpp::R_POWERPC_REL14
:
4363 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4364 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4371 // Anything else is a problem.
4372 // If we are building a static executable, the libc startup function
4373 // responsible for applying indirect function relocations is going
4374 // to complain about the reloc type.
4375 // If we are building a dynamic executable, we will have a text
4376 // relocation. The dynamic loader will set the text segment
4377 // writable and non-executable to apply text relocations. So we'll
4378 // segfault when trying to run the indirection function to resolve
4380 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4381 object
->name().c_str(), r_type
);
4385 // Scan a relocation for a local symbol.
4387 template<int size
, bool big_endian
>
4389 Target_powerpc
<size
, big_endian
>::Scan::local(
4390 Symbol_table
* symtab
,
4392 Target_powerpc
<size
, big_endian
>* target
,
4393 Sized_relobj_file
<size
, big_endian
>* object
,
4394 unsigned int data_shndx
,
4395 Output_section
* output_section
,
4396 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4397 unsigned int r_type
,
4398 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4401 Powerpc_relobj
<size
, big_endian
>* ppc_object
4402 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4407 && data_shndx
== ppc_object
->opd_shndx()
4408 && r_type
== elfcpp::R_PPC64_ADDR64
)
4409 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4413 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4414 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4415 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
4417 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4418 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4419 r_type
, r_sym
, reloc
.get_r_addend());
4420 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
4425 case elfcpp::R_POWERPC_NONE
:
4426 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4427 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4428 case elfcpp::R_PPC64_TOCSAVE
:
4429 case elfcpp::R_PPC_EMB_MRKREF
:
4430 case elfcpp::R_POWERPC_TLS
:
4433 case elfcpp::R_PPC64_TOC
:
4435 Output_data_got_powerpc
<size
, big_endian
>* got
4436 = target
->got_section(symtab
, layout
);
4437 if (parameters
->options().output_is_position_independent())
4439 Address off
= reloc
.get_r_offset();
4441 && data_shndx
== ppc_object
->opd_shndx()
4442 && ppc_object
->get_opd_discard(off
- 8))
4445 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4446 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4447 rela_dyn
->add_output_section_relative(got
->output_section(),
4448 elfcpp::R_POWERPC_RELATIVE
,
4450 object
, data_shndx
, off
,
4451 symobj
->toc_base_offset());
4456 case elfcpp::R_PPC64_ADDR64
:
4457 case elfcpp::R_PPC64_UADDR64
:
4458 case elfcpp::R_POWERPC_ADDR32
:
4459 case elfcpp::R_POWERPC_UADDR32
:
4460 case elfcpp::R_POWERPC_ADDR24
:
4461 case elfcpp::R_POWERPC_ADDR16
:
4462 case elfcpp::R_POWERPC_ADDR16_LO
:
4463 case elfcpp::R_POWERPC_ADDR16_HI
:
4464 case elfcpp::R_POWERPC_ADDR16_HA
:
4465 case elfcpp::R_POWERPC_UADDR16
:
4466 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4467 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4468 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4469 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4470 case elfcpp::R_PPC64_ADDR16_DS
:
4471 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4472 case elfcpp::R_POWERPC_ADDR14
:
4473 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4474 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4475 // If building a shared library (or a position-independent
4476 // executable), we need to create a dynamic relocation for
4478 if (parameters
->options().output_is_position_independent()
4479 || (size
== 64 && is_ifunc
))
4481 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4483 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
4484 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
4486 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4487 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4490 rela_dyn
= target
->iplt_section()->rel_plt();
4491 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4493 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4494 output_section
, data_shndx
,
4495 reloc
.get_r_offset(),
4496 reloc
.get_r_addend(), false);
4500 check_non_pic(object
, r_type
);
4501 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4502 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
4503 data_shndx
, reloc
.get_r_offset(),
4504 reloc
.get_r_addend());
4509 case elfcpp::R_POWERPC_REL24
:
4510 case elfcpp::R_PPC_PLTREL24
:
4511 case elfcpp::R_PPC_LOCAL24PC
:
4512 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4513 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4514 reloc
.get_r_addend());
4517 case elfcpp::R_POWERPC_REL14
:
4518 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4519 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4520 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4521 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4522 reloc
.get_r_addend());
4525 case elfcpp::R_PPC64_REL64
:
4526 case elfcpp::R_POWERPC_REL32
:
4527 case elfcpp::R_POWERPC_REL16
:
4528 case elfcpp::R_POWERPC_REL16_LO
:
4529 case elfcpp::R_POWERPC_REL16_HI
:
4530 case elfcpp::R_POWERPC_REL16_HA
:
4531 case elfcpp::R_POWERPC_SECTOFF
:
4532 case elfcpp::R_POWERPC_TPREL16
:
4533 case elfcpp::R_POWERPC_DTPREL16
:
4534 case elfcpp::R_POWERPC_SECTOFF_LO
:
4535 case elfcpp::R_POWERPC_TPREL16_LO
:
4536 case elfcpp::R_POWERPC_DTPREL16_LO
:
4537 case elfcpp::R_POWERPC_SECTOFF_HI
:
4538 case elfcpp::R_POWERPC_TPREL16_HI
:
4539 case elfcpp::R_POWERPC_DTPREL16_HI
:
4540 case elfcpp::R_POWERPC_SECTOFF_HA
:
4541 case elfcpp::R_POWERPC_TPREL16_HA
:
4542 case elfcpp::R_POWERPC_DTPREL16_HA
:
4543 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4544 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4545 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4546 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4547 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4548 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4549 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4550 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4551 case elfcpp::R_PPC64_TPREL16_DS
:
4552 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4553 case elfcpp::R_PPC64_DTPREL16_DS
:
4554 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4555 case elfcpp::R_PPC64_SECTOFF_DS
:
4556 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4557 case elfcpp::R_PPC64_TLSGD
:
4558 case elfcpp::R_PPC64_TLSLD
:
4561 case elfcpp::R_POWERPC_GOT16
:
4562 case elfcpp::R_POWERPC_GOT16_LO
:
4563 case elfcpp::R_POWERPC_GOT16_HI
:
4564 case elfcpp::R_POWERPC_GOT16_HA
:
4565 case elfcpp::R_PPC64_GOT16_DS
:
4566 case elfcpp::R_PPC64_GOT16_LO_DS
:
4568 // The symbol requires a GOT entry.
4569 Output_data_got_powerpc
<size
, big_endian
>* got
4570 = target
->got_section(symtab
, layout
);
4571 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4573 if (!parameters
->options().output_is_position_independent())
4575 if (size
== 32 && is_ifunc
)
4576 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
4578 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
4580 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
4582 // If we are generating a shared object or a pie, this
4583 // symbol's GOT entry will be set by a dynamic relocation.
4585 off
= got
->add_constant(0);
4586 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
4588 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4589 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4592 rela_dyn
= target
->iplt_section()->rel_plt();
4593 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4595 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4596 got
, off
, 0, false);
4601 case elfcpp::R_PPC64_TOC16
:
4602 case elfcpp::R_PPC64_TOC16_LO
:
4603 case elfcpp::R_PPC64_TOC16_HI
:
4604 case elfcpp::R_PPC64_TOC16_HA
:
4605 case elfcpp::R_PPC64_TOC16_DS
:
4606 case elfcpp::R_PPC64_TOC16_LO_DS
:
4607 // We need a GOT section.
4608 target
->got_section(symtab
, layout
);
4611 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4612 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4613 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4614 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4616 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4617 if (tls_type
== tls::TLSOPT_NONE
)
4619 Output_data_got_powerpc
<size
, big_endian
>* got
4620 = target
->got_section(symtab
, layout
);
4621 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4622 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4623 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
4624 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
4626 else if (tls_type
== tls::TLSOPT_TO_LE
)
4628 // no GOT relocs needed for Local Exec.
4635 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4636 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4637 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4638 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4640 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4641 if (tls_type
== tls::TLSOPT_NONE
)
4642 target
->tlsld_got_offset(symtab
, layout
, object
);
4643 else if (tls_type
== tls::TLSOPT_TO_LE
)
4645 // no GOT relocs needed for Local Exec.
4646 if (parameters
->options().emit_relocs())
4648 Output_section
* os
= layout
->tls_segment()->first_section();
4649 gold_assert(os
!= NULL
);
4650 os
->set_needs_symtab_index();
4658 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4659 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4660 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4661 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4663 Output_data_got_powerpc
<size
, big_endian
>* got
4664 = target
->got_section(symtab
, layout
);
4665 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4666 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
4670 case elfcpp::R_POWERPC_GOT_TPREL16
:
4671 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4672 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4673 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4675 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
4676 if (tls_type
== tls::TLSOPT_NONE
)
4678 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4679 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
4681 Output_data_got_powerpc
<size
, big_endian
>* got
4682 = target
->got_section(symtab
, layout
);
4683 unsigned int off
= got
->add_constant(0);
4684 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
4686 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4687 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
4688 elfcpp::R_POWERPC_TPREL
,
4692 else if (tls_type
== tls::TLSOPT_TO_LE
)
4694 // no GOT relocs needed for Local Exec.
4702 unsupported_reloc_local(object
, r_type
);
4708 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4709 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4710 case elfcpp::R_POWERPC_GOT_TPREL16
:
4711 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4712 case elfcpp::R_POWERPC_GOT16
:
4713 case elfcpp::R_PPC64_GOT16_DS
:
4714 case elfcpp::R_PPC64_TOC16
:
4715 case elfcpp::R_PPC64_TOC16_DS
:
4716 ppc_object
->set_has_small_toc_reloc();
4722 // Report an unsupported relocation against a global symbol.
4724 template<int size
, bool big_endian
>
4726 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
4727 Sized_relobj_file
<size
, big_endian
>* object
,
4728 unsigned int r_type
,
4731 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4732 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
4735 // Scan a relocation for a global symbol.
4737 template<int size
, bool big_endian
>
4739 Target_powerpc
<size
, big_endian
>::Scan::global(
4740 Symbol_table
* symtab
,
4742 Target_powerpc
<size
, big_endian
>* target
,
4743 Sized_relobj_file
<size
, big_endian
>* object
,
4744 unsigned int data_shndx
,
4745 Output_section
* output_section
,
4746 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4747 unsigned int r_type
,
4750 Powerpc_relobj
<size
, big_endian
>* ppc_object
4751 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4753 // A STT_GNU_IFUNC symbol may require a PLT entry.
4754 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4755 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
4757 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4758 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4759 reloc
.get_r_addend());
4760 target
->make_plt_entry(symtab
, layout
, gsym
);
4765 case elfcpp::R_POWERPC_NONE
:
4766 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4767 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4768 case elfcpp::R_PPC_LOCAL24PC
:
4769 case elfcpp::R_PPC_EMB_MRKREF
:
4770 case elfcpp::R_POWERPC_TLS
:
4773 case elfcpp::R_PPC64_TOC
:
4775 Output_data_got_powerpc
<size
, big_endian
>* got
4776 = target
->got_section(symtab
, layout
);
4777 if (parameters
->options().output_is_position_independent())
4779 Address off
= reloc
.get_r_offset();
4781 && data_shndx
== ppc_object
->opd_shndx()
4782 && ppc_object
->get_opd_discard(off
- 8))
4785 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4786 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4787 if (data_shndx
!= ppc_object
->opd_shndx())
4788 symobj
= static_cast
4789 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4790 rela_dyn
->add_output_section_relative(got
->output_section(),
4791 elfcpp::R_POWERPC_RELATIVE
,
4793 object
, data_shndx
, off
,
4794 symobj
->toc_base_offset());
4799 case elfcpp::R_PPC64_ADDR64
:
4801 && data_shndx
== ppc_object
->opd_shndx()
4802 && (gsym
->is_defined_in_discarded_section()
4803 || gsym
->object() != object
))
4805 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4809 case elfcpp::R_PPC64_UADDR64
:
4810 case elfcpp::R_POWERPC_ADDR32
:
4811 case elfcpp::R_POWERPC_UADDR32
:
4812 case elfcpp::R_POWERPC_ADDR24
:
4813 case elfcpp::R_POWERPC_ADDR16
:
4814 case elfcpp::R_POWERPC_ADDR16_LO
:
4815 case elfcpp::R_POWERPC_ADDR16_HI
:
4816 case elfcpp::R_POWERPC_ADDR16_HA
:
4817 case elfcpp::R_POWERPC_UADDR16
:
4818 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4819 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4820 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4821 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4822 case elfcpp::R_PPC64_ADDR16_DS
:
4823 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4824 case elfcpp::R_POWERPC_ADDR14
:
4825 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4826 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4828 // Make a PLT entry if necessary.
4829 if (gsym
->needs_plt_entry())
4831 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4833 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4834 reloc
.get_r_addend());
4835 target
->make_plt_entry(symtab
, layout
, gsym
);
4836 // Since this is not a PC-relative relocation, we may be
4837 // taking the address of a function. In that case we need to
4838 // set the entry in the dynamic symbol table to the address of
4839 // the PLT call stub.
4841 && gsym
->is_from_dynobj()
4842 && !parameters
->options().output_is_position_independent())
4843 gsym
->set_needs_dynsym_value();
4845 // Make a dynamic relocation if necessary.
4846 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4847 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
4849 if (gsym
->may_need_copy_reloc())
4851 target
->copy_reloc(symtab
, layout
, object
,
4852 data_shndx
, output_section
, gsym
, reloc
);
4854 else if ((size
== 32
4855 && r_type
== elfcpp::R_POWERPC_ADDR32
4856 && gsym
->can_use_relative_reloc(false)
4857 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
4858 && parameters
->options().shared()))
4860 && r_type
== elfcpp::R_PPC64_ADDR64
4861 && (gsym
->can_use_relative_reloc(false)
4862 || data_shndx
== ppc_object
->opd_shndx())))
4864 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4865 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4866 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4868 rela_dyn
= target
->iplt_section()->rel_plt();
4869 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4871 rela_dyn
->add_symbolless_global_addend(
4872 gsym
, dynrel
, output_section
, object
, data_shndx
,
4873 reloc
.get_r_offset(), reloc
.get_r_addend());
4877 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4878 check_non_pic(object
, r_type
);
4879 rela_dyn
->add_global(gsym
, r_type
, output_section
,
4881 reloc
.get_r_offset(),
4882 reloc
.get_r_addend());
4888 case elfcpp::R_PPC_PLTREL24
:
4889 case elfcpp::R_POWERPC_REL24
:
4890 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4891 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4892 reloc
.get_r_addend());
4893 if (gsym
->needs_plt_entry()
4894 || (!gsym
->final_value_is_known()
4895 && (gsym
->is_undefined()
4896 || gsym
->is_from_dynobj()
4897 || gsym
->is_preemptible())))
4898 target
->make_plt_entry(symtab
, layout
, gsym
);
4901 case elfcpp::R_PPC64_REL64
:
4902 case elfcpp::R_POWERPC_REL32
:
4903 // Make a dynamic relocation if necessary.
4904 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
4906 if (gsym
->may_need_copy_reloc())
4908 target
->copy_reloc(symtab
, layout
, object
,
4909 data_shndx
, output_section
, gsym
,
4914 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4915 check_non_pic(object
, r_type
);
4916 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
4917 data_shndx
, reloc
.get_r_offset(),
4918 reloc
.get_r_addend());
4923 case elfcpp::R_POWERPC_REL14
:
4924 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4925 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4926 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4927 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4928 reloc
.get_r_addend());
4931 case elfcpp::R_POWERPC_REL16
:
4932 case elfcpp::R_POWERPC_REL16_LO
:
4933 case elfcpp::R_POWERPC_REL16_HI
:
4934 case elfcpp::R_POWERPC_REL16_HA
:
4935 case elfcpp::R_POWERPC_SECTOFF
:
4936 case elfcpp::R_POWERPC_TPREL16
:
4937 case elfcpp::R_POWERPC_DTPREL16
:
4938 case elfcpp::R_POWERPC_SECTOFF_LO
:
4939 case elfcpp::R_POWERPC_TPREL16_LO
:
4940 case elfcpp::R_POWERPC_DTPREL16_LO
:
4941 case elfcpp::R_POWERPC_SECTOFF_HI
:
4942 case elfcpp::R_POWERPC_TPREL16_HI
:
4943 case elfcpp::R_POWERPC_DTPREL16_HI
:
4944 case elfcpp::R_POWERPC_SECTOFF_HA
:
4945 case elfcpp::R_POWERPC_TPREL16_HA
:
4946 case elfcpp::R_POWERPC_DTPREL16_HA
:
4947 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4948 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4949 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4950 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4951 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4952 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4953 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4954 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4955 case elfcpp::R_PPC64_TPREL16_DS
:
4956 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4957 case elfcpp::R_PPC64_DTPREL16_DS
:
4958 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4959 case elfcpp::R_PPC64_SECTOFF_DS
:
4960 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4961 case elfcpp::R_PPC64_TLSGD
:
4962 case elfcpp::R_PPC64_TLSLD
:
4965 case elfcpp::R_POWERPC_GOT16
:
4966 case elfcpp::R_POWERPC_GOT16_LO
:
4967 case elfcpp::R_POWERPC_GOT16_HI
:
4968 case elfcpp::R_POWERPC_GOT16_HA
:
4969 case elfcpp::R_PPC64_GOT16_DS
:
4970 case elfcpp::R_PPC64_GOT16_LO_DS
:
4972 // The symbol requires a GOT entry.
4973 Output_data_got_powerpc
<size
, big_endian
>* got
;
4975 got
= target
->got_section(symtab
, layout
);
4976 if (gsym
->final_value_is_known())
4978 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4979 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
4981 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
4983 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
4985 // If we are generating a shared object or a pie, this
4986 // symbol's GOT entry will be set by a dynamic relocation.
4987 unsigned int off
= got
->add_constant(0);
4988 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
4990 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4991 if (gsym
->can_use_relative_reloc(false)
4993 && gsym
->visibility() == elfcpp::STV_PROTECTED
4994 && parameters
->options().shared()))
4996 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4997 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4999 rela_dyn
= target
->iplt_section()->rel_plt();
5000 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
5002 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5006 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5007 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5013 case elfcpp::R_PPC64_TOC16
:
5014 case elfcpp::R_PPC64_TOC16_LO
:
5015 case elfcpp::R_PPC64_TOC16_HI
:
5016 case elfcpp::R_PPC64_TOC16_HA
:
5017 case elfcpp::R_PPC64_TOC16_DS
:
5018 case elfcpp::R_PPC64_TOC16_LO_DS
:
5019 // We need a GOT section.
5020 target
->got_section(symtab
, layout
);
5023 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5024 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5025 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5026 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5028 const bool final
= gsym
->final_value_is_known();
5029 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5030 if (tls_type
== tls::TLSOPT_NONE
)
5032 Output_data_got_powerpc
<size
, big_endian
>* got
5033 = target
->got_section(symtab
, layout
);
5034 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
5035 target
->rela_dyn_section(layout
),
5036 elfcpp::R_POWERPC_DTPMOD
,
5037 elfcpp::R_POWERPC_DTPREL
);
5039 else if (tls_type
== tls::TLSOPT_TO_IE
)
5041 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5043 Output_data_got_powerpc
<size
, big_endian
>* got
5044 = target
->got_section(symtab
, layout
);
5045 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5046 if (gsym
->is_undefined()
5047 || gsym
->is_from_dynobj())
5049 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5050 elfcpp::R_POWERPC_TPREL
);
5054 unsigned int off
= got
->add_constant(0);
5055 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5056 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5057 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5062 else if (tls_type
== tls::TLSOPT_TO_LE
)
5064 // no GOT relocs needed for Local Exec.
5071 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5072 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5073 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5074 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5076 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5077 if (tls_type
== tls::TLSOPT_NONE
)
5078 target
->tlsld_got_offset(symtab
, layout
, object
);
5079 else if (tls_type
== tls::TLSOPT_TO_LE
)
5081 // no GOT relocs needed for Local Exec.
5082 if (parameters
->options().emit_relocs())
5084 Output_section
* os
= layout
->tls_segment()->first_section();
5085 gold_assert(os
!= NULL
);
5086 os
->set_needs_symtab_index();
5094 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5095 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5096 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5097 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5099 Output_data_got_powerpc
<size
, big_endian
>* got
5100 = target
->got_section(symtab
, layout
);
5101 if (!gsym
->final_value_is_known()
5102 && (gsym
->is_from_dynobj()
5103 || gsym
->is_undefined()
5104 || gsym
->is_preemptible()))
5105 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5106 target
->rela_dyn_section(layout
),
5107 elfcpp::R_POWERPC_DTPREL
);
5109 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5113 case elfcpp::R_POWERPC_GOT_TPREL16
:
5114 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5115 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5116 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5118 const bool final
= gsym
->final_value_is_known();
5119 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5120 if (tls_type
== tls::TLSOPT_NONE
)
5122 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5124 Output_data_got_powerpc
<size
, big_endian
>* got
5125 = target
->got_section(symtab
, layout
);
5126 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5127 if (gsym
->is_undefined()
5128 || gsym
->is_from_dynobj())
5130 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5131 elfcpp::R_POWERPC_TPREL
);
5135 unsigned int off
= got
->add_constant(0);
5136 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5137 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5138 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5143 else if (tls_type
== tls::TLSOPT_TO_LE
)
5145 // no GOT relocs needed for Local Exec.
5153 unsupported_reloc_global(object
, r_type
, gsym
);
5159 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5160 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5161 case elfcpp::R_POWERPC_GOT_TPREL16
:
5162 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5163 case elfcpp::R_POWERPC_GOT16
:
5164 case elfcpp::R_PPC64_GOT16_DS
:
5165 case elfcpp::R_PPC64_TOC16
:
5166 case elfcpp::R_PPC64_TOC16_DS
:
5167 ppc_object
->set_has_small_toc_reloc();
5173 // Process relocations for gc.
5175 template<int size
, bool big_endian
>
5177 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5178 Symbol_table
* symtab
,
5180 Sized_relobj_file
<size
, big_endian
>* object
,
5181 unsigned int data_shndx
,
5183 const unsigned char* prelocs
,
5185 Output_section
* output_section
,
5186 bool needs_special_offset_handling
,
5187 size_t local_symbol_count
,
5188 const unsigned char* plocal_symbols
)
5190 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5191 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5192 Powerpc_relobj
<size
, big_endian
>* ppc_object
5193 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5195 ppc_object
->set_opd_valid();
5196 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5198 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5199 for (p
= ppc_object
->access_from_map()->begin();
5200 p
!= ppc_object
->access_from_map()->end();
5203 Address dst_off
= p
->first
;
5204 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5205 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5206 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5208 Object
* src_obj
= s
->first
;
5209 unsigned int src_indx
= s
->second
;
5210 symtab
->gc()->add_reference(src_obj
, src_indx
,
5211 ppc_object
, dst_indx
);
5215 ppc_object
->access_from_map()->clear();
5216 ppc_object
->process_gc_mark(symtab
);
5217 // Don't look at .opd relocs as .opd will reference everything.
5221 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5222 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5231 needs_special_offset_handling
,
5236 // Handle target specific gc actions when adding a gc reference from
5237 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5238 // and DST_OFF. For powerpc64, this adds a referenc to the code
5239 // section of a function descriptor.
5241 template<int size
, bool big_endian
>
5243 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5244 Symbol_table
* symtab
,
5246 unsigned int src_shndx
,
5248 unsigned int dst_shndx
,
5249 Address dst_off
) const
5251 Powerpc_relobj
<size
, big_endian
>* ppc_object
5252 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5254 && !ppc_object
->is_dynamic()
5255 && dst_shndx
== ppc_object
->opd_shndx())
5257 if (ppc_object
->opd_valid())
5259 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5260 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5264 // If we haven't run scan_opd_relocs, we must delay
5265 // processing this function descriptor reference.
5266 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5271 // Add any special sections for this symbol to the gc work list.
5272 // For powerpc64, this adds the code section of a function
5275 template<int size
, bool big_endian
>
5277 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5278 Symbol_table
* symtab
,
5283 Powerpc_relobj
<size
, big_endian
>* ppc_object
5284 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5286 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5287 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
5289 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5290 Address dst_off
= gsym
->value();
5291 if (ppc_object
->opd_valid())
5293 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5294 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5297 ppc_object
->add_gc_mark(dst_off
);
5302 // Scan relocations for a section.
5304 template<int size
, bool big_endian
>
5306 Target_powerpc
<size
, big_endian
>::scan_relocs(
5307 Symbol_table
* symtab
,
5309 Sized_relobj_file
<size
, big_endian
>* object
,
5310 unsigned int data_shndx
,
5311 unsigned int sh_type
,
5312 const unsigned char* prelocs
,
5314 Output_section
* output_section
,
5315 bool needs_special_offset_handling
,
5316 size_t local_symbol_count
,
5317 const unsigned char* plocal_symbols
)
5319 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5320 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5322 if (sh_type
== elfcpp::SHT_REL
)
5324 gold_error(_("%s: unsupported REL reloc section"),
5325 object
->name().c_str());
5329 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5338 needs_special_offset_handling
,
5343 // Functor class for processing the global symbol table.
5344 // Removes symbols defined on discarded opd entries.
5346 template<bool big_endian
>
5347 class Global_symbol_visitor_opd
5350 Global_symbol_visitor_opd()
5354 operator()(Sized_symbol
<64>* sym
)
5356 if (sym
->has_symtab_index()
5357 || sym
->source() != Symbol::FROM_OBJECT
5358 || !sym
->in_real_elf())
5361 Powerpc_relobj
<64, big_endian
>* symobj
5362 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5363 if (symobj
->is_dynamic()
5364 || symobj
->opd_shndx() == 0)
5368 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5369 if (shndx
== symobj
->opd_shndx()
5370 && symobj
->get_opd_discard(sym
->value()))
5371 sym
->set_symtab_index(-1U);
5375 template<int size
, bool big_endian
>
5377 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
5379 Symbol_table
* symtab
)
5383 Output_data_save_res
<64, big_endian
>* savres
5384 = new Output_data_save_res
<64, big_endian
>(symtab
);
5385 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5386 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5387 savres
, ORDER_TEXT
, false);
5391 // Sort linker created .got section first (for the header), then input
5392 // sections belonging to files using small model code.
5394 template<bool big_endian
>
5395 class Sort_toc_sections
5399 operator()(const Output_section::Input_section
& is1
,
5400 const Output_section::Input_section
& is2
) const
5402 if (!is1
.is_input_section() && is2
.is_input_section())
5405 = (is1
.is_input_section()
5406 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
5407 ->has_small_toc_reloc()));
5409 = (is2
.is_input_section()
5410 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
5411 ->has_small_toc_reloc()));
5412 return small1
&& !small2
;
5416 // Finalize the sections.
5418 template<int size
, bool big_endian
>
5420 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
5422 const Input_objects
*,
5423 Symbol_table
* symtab
)
5425 if (parameters
->doing_static_link())
5427 // At least some versions of glibc elf-init.o have a strong
5428 // reference to __rela_iplt marker syms. A weak ref would be
5430 if (this->iplt_
!= NULL
)
5432 Reloc_section
* rel
= this->iplt_
->rel_plt();
5433 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
5434 Symbol_table::PREDEFINED
, rel
, 0, 0,
5435 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5436 elfcpp::STV_HIDDEN
, 0, false, true);
5437 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
5438 Symbol_table::PREDEFINED
, rel
, 0, 0,
5439 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5440 elfcpp::STV_HIDDEN
, 0, true, true);
5444 symtab
->define_as_constant("__rela_iplt_start", NULL
,
5445 Symbol_table::PREDEFINED
, 0, 0,
5446 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5447 elfcpp::STV_HIDDEN
, 0, true, false);
5448 symtab
->define_as_constant("__rela_iplt_end", NULL
,
5449 Symbol_table::PREDEFINED
, 0, 0,
5450 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5451 elfcpp::STV_HIDDEN
, 0, true, false);
5457 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
5458 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
5460 if (!parameters
->options().relocatable())
5462 this->define_save_restore_funcs(layout
, symtab
);
5464 // Annoyingly, we need to make these sections now whether or
5465 // not we need them. If we delay until do_relax then we
5466 // need to mess with the relaxation machinery checkpointing.
5467 this->got_section(symtab
, layout
);
5468 this->make_brlt_section(layout
);
5470 if (parameters
->options().toc_sort())
5472 Output_section
* os
= this->got_
->output_section();
5473 if (os
!= NULL
&& os
->input_sections().size() > 1)
5474 std::stable_sort(os
->input_sections().begin(),
5475 os
->input_sections().end(),
5476 Sort_toc_sections
<big_endian
>());
5481 // Fill in some more dynamic tags.
5482 Output_data_dynamic
* odyn
= layout
->dynamic_data();
5485 const Reloc_section
* rel_plt
= (this->plt_
== NULL
5487 : this->plt_
->rel_plt());
5488 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
5489 this->rela_dyn_
, true, size
== 32);
5493 if (this->got_
!= NULL
)
5495 this->got_
->finalize_data_size();
5496 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
5497 this->got_
, this->got_
->g_o_t());
5502 if (this->glink_
!= NULL
)
5504 this->glink_
->finalize_data_size();
5505 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
5507 (this->glink_
->pltresolve_size
5513 // Emit any relocs we saved in an attempt to avoid generating COPY
5515 if (this->copy_relocs_
.any_saved_relocs())
5516 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
5519 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5523 ok_lo_toc_insn(uint32_t insn
)
5525 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
5526 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5527 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5528 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5529 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5530 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5531 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5532 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5533 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5534 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5535 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5536 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5537 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5538 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5539 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5541 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
5542 && ((insn
& 3) == 0 || (insn
& 3) == 3))
5543 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
5546 // Return the value to use for a branch relocation.
5548 template<int size
, bool big_endian
>
5549 typename
elfcpp::Elf_types
<size
>::Elf_Addr
5550 Target_powerpc
<size
, big_endian
>::symval_for_branch(
5552 const Sized_symbol
<size
>* gsym
,
5553 Powerpc_relobj
<size
, big_endian
>* object
,
5554 unsigned int *dest_shndx
)
5560 // If the symbol is defined in an opd section, ie. is a function
5561 // descriptor, use the function descriptor code entry address
5562 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
5564 && gsym
->source() != Symbol::FROM_OBJECT
)
5567 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5568 unsigned int shndx
= symobj
->opd_shndx();
5571 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
5572 gold_assert(opd_addr
!= invalid_address
);
5573 opd_addr
+= symobj
->output_section(shndx
)->address();
5574 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
5577 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
5578 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
5579 gold_assert(sec_addr
!= invalid_address
);
5580 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
5581 value
= sec_addr
+ sec_off
;
5586 // Perform a relocation.
5588 template<int size
, bool big_endian
>
5590 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
5591 const Relocate_info
<size
, big_endian
>* relinfo
,
5592 Target_powerpc
* target
,
5595 const elfcpp::Rela
<size
, big_endian
>& rela
,
5596 unsigned int r_type
,
5597 const Sized_symbol
<size
>* gsym
,
5598 const Symbol_value
<size
>* psymval
,
5599 unsigned char* view
,
5601 section_size_type view_size
)
5603 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
5604 || r_type
== elfcpp::R_PPC_PLTREL24
)
5606 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
5607 enum skip_tls last_tls
= this->call_tls_get_addr_
;
5608 this->call_tls_get_addr_
= CALL_NOT_EXPECTED
;
5611 if (last_tls
== CALL_NOT_EXPECTED
)
5612 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5613 _("__tls_get_addr call lacks marker reloc"));
5614 else if (last_tls
== CALL_SKIP
)
5617 else if (last_tls
!= CALL_NOT_EXPECTED
)
5618 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5619 _("missing expected __tls_get_addr call"));
5621 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
5622 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
5623 Powerpc_relobj
<size
, big_endian
>* const object
5624 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5626 bool has_plt_value
= false;
5627 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5629 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5630 : object
->local_has_plt_offset(r_sym
))
5632 Stub_table
<size
, big_endian
>* stub_table
5633 = object
->stub_table(relinfo
->data_shndx
);
5634 if (stub_table
== NULL
)
5636 // This is a ref from a data section to an ifunc symbol.
5637 if (target
->stub_tables().size() != 0)
5638 stub_table
= target
->stub_tables()[0];
5640 gold_assert(stub_table
!= NULL
);
5643 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
5644 rela
.get_r_addend());
5646 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
5647 rela
.get_r_addend());
5648 gold_assert(off
!= invalid_address
);
5649 value
= stub_table
->stub_address() + off
;
5650 has_plt_value
= true;
5653 if (r_type
== elfcpp::R_POWERPC_GOT16
5654 || r_type
== elfcpp::R_POWERPC_GOT16_LO
5655 || r_type
== elfcpp::R_POWERPC_GOT16_HI
5656 || r_type
== elfcpp::R_POWERPC_GOT16_HA
5657 || r_type
== elfcpp::R_PPC64_GOT16_DS
5658 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
5662 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
5663 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
5667 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5668 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
5669 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
5671 value
-= target
->got_section()->got_base_offset(object
);
5673 else if (r_type
== elfcpp::R_PPC64_TOC
)
5675 value
= (target
->got_section()->output_section()->address()
5676 + object
->toc_base_offset());
5678 else if (gsym
!= NULL
5679 && (r_type
== elfcpp::R_POWERPC_REL24
5680 || r_type
== elfcpp::R_PPC_PLTREL24
)
5685 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
5686 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
5687 bool can_plt_call
= false;
5688 if (rela
.get_r_offset() + 8 <= view_size
)
5690 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5691 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
5694 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
5696 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
5697 can_plt_call
= true;
5702 // If we don't have a branch and link followed by a nop,
5703 // we can't go via the plt because there is no place to
5704 // put a toc restoring instruction.
5705 // Unless we know we won't be returning.
5706 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
5707 can_plt_call
= true;
5711 // This is not an error in one special case: A self
5712 // call. It isn't possible to cheaply verify we have
5713 // such a call so just check for a call to the same
5716 Address code
= value
;
5717 if (gsym
->source() == Symbol::FROM_OBJECT
5718 && gsym
->object() == object
)
5720 Address addend
= rela
.get_r_addend();
5721 unsigned int dest_shndx
;
5722 Address opdent
= psymval
->value(object
, addend
);
5723 code
= target
->symval_for_branch(opdent
, gsym
, object
,
5726 if (dest_shndx
== 0)
5727 dest_shndx
= gsym
->shndx(&is_ordinary
);
5728 ok
= dest_shndx
== relinfo
->data_shndx
;
5732 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5733 _("call lacks nop, can't restore toc; "
5734 "recompile with -fPIC"));
5740 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5741 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5742 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5743 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5745 // First instruction of a global dynamic sequence, arg setup insn.
5746 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5747 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5748 enum Got_type got_type
= GOT_TYPE_STANDARD
;
5749 if (tls_type
== tls::TLSOPT_NONE
)
5750 got_type
= GOT_TYPE_TLSGD
;
5751 else if (tls_type
== tls::TLSOPT_TO_IE
)
5752 got_type
= GOT_TYPE_TPREL
;
5753 if (got_type
!= GOT_TYPE_STANDARD
)
5757 gold_assert(gsym
->has_got_offset(got_type
));
5758 value
= gsym
->got_offset(got_type
);
5762 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5763 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
5764 value
= object
->local_got_offset(r_sym
, got_type
);
5766 value
-= target
->got_section()->got_base_offset(object
);
5768 if (tls_type
== tls::TLSOPT_TO_IE
)
5770 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5771 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5773 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5774 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5775 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
5777 insn
|= 32 << 26; // lwz
5779 insn
|= 58 << 26; // ld
5780 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5782 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5783 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5785 else if (tls_type
== tls::TLSOPT_TO_LE
)
5787 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5788 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5790 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5791 Insn insn
= addis_3_13
;
5794 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5795 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5796 value
= psymval
->value(object
, rela
.get_r_addend());
5800 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5802 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5803 r_type
= elfcpp::R_POWERPC_NONE
;
5807 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5808 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5809 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5810 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5812 // First instruction of a local dynamic sequence, arg setup insn.
5813 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5814 if (tls_type
== tls::TLSOPT_NONE
)
5816 value
= target
->tlsld_got_offset();
5817 value
-= target
->got_section()->got_base_offset(object
);
5821 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5822 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5823 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5825 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5826 Insn insn
= addis_3_13
;
5829 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5830 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5835 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5837 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5838 r_type
= elfcpp::R_POWERPC_NONE
;
5842 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
5843 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
5844 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
5845 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
5847 // Accesses relative to a local dynamic sequence address,
5848 // no optimisation here.
5851 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
5852 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
5856 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5857 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
5858 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
5860 value
-= target
->got_section()->got_base_offset(object
);
5862 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5863 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5864 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5865 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5867 // First instruction of initial exec sequence.
5868 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5869 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5870 if (tls_type
== tls::TLSOPT_NONE
)
5874 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
5875 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
5879 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5880 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
5881 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
5883 value
-= target
->got_section()->got_base_offset(object
);
5887 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5888 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5889 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
5891 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5892 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5893 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
5898 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5899 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5900 value
= psymval
->value(object
, rela
.get_r_addend());
5904 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5906 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5907 r_type
= elfcpp::R_POWERPC_NONE
;
5911 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5912 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5914 // Second instruction of a global dynamic sequence,
5915 // the __tls_get_addr call
5916 this->call_tls_get_addr_
= CALL_EXPECTED
;
5917 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5918 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5919 if (tls_type
!= tls::TLSOPT_NONE
)
5921 if (tls_type
== tls::TLSOPT_TO_IE
)
5923 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5924 Insn insn
= add_3_3_13
;
5927 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5928 r_type
= elfcpp::R_POWERPC_NONE
;
5932 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5933 Insn insn
= addi_3_3
;
5934 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5935 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5936 view
+= 2 * big_endian
;
5937 value
= psymval
->value(object
, rela
.get_r_addend());
5939 this->call_tls_get_addr_
= CALL_SKIP
;
5942 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5943 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5945 // Second instruction of a local dynamic sequence,
5946 // the __tls_get_addr call
5947 this->call_tls_get_addr_
= CALL_EXPECTED
;
5948 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5949 if (tls_type
== tls::TLSOPT_TO_LE
)
5951 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5952 Insn insn
= addi_3_3
;
5953 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5954 this->call_tls_get_addr_
= CALL_SKIP
;
5955 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5956 view
+= 2 * big_endian
;
5960 else if (r_type
== elfcpp::R_POWERPC_TLS
)
5962 // Second instruction of an initial exec sequence
5963 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5964 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5965 if (tls_type
== tls::TLSOPT_TO_LE
)
5967 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5968 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5969 unsigned int reg
= size
== 32 ? 2 : 13;
5970 insn
= at_tls_transform(insn
, reg
);
5971 gold_assert(insn
!= 0);
5972 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5973 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5974 view
+= 2 * big_endian
;
5975 value
= psymval
->value(object
, rela
.get_r_addend());
5978 else if (!has_plt_value
)
5981 unsigned int dest_shndx
;
5982 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
5983 addend
= rela
.get_r_addend();
5984 value
= psymval
->value(object
, addend
);
5985 if (size
== 64 && is_branch_reloc(r_type
))
5986 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
5987 unsigned int max_branch_offset
= 0;
5988 if (r_type
== elfcpp::R_POWERPC_REL24
5989 || r_type
== elfcpp::R_PPC_PLTREL24
5990 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
5991 max_branch_offset
= 1 << 25;
5992 else if (r_type
== elfcpp::R_POWERPC_REL14
5993 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
5994 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
5995 max_branch_offset
= 1 << 15;
5996 if (max_branch_offset
!= 0
5997 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
5999 Stub_table
<size
, big_endian
>* stub_table
6000 = object
->stub_table(relinfo
->data_shndx
);
6001 gold_assert(stub_table
!= NULL
);
6002 Address off
= stub_table
->find_long_branch_entry(object
, value
);
6003 if (off
!= invalid_address
)
6004 value
= stub_table
->stub_address() + stub_table
->plt_size() + off
;
6010 case elfcpp::R_PPC64_REL64
:
6011 case elfcpp::R_POWERPC_REL32
:
6012 case elfcpp::R_POWERPC_REL24
:
6013 case elfcpp::R_PPC_PLTREL24
:
6014 case elfcpp::R_PPC_LOCAL24PC
:
6015 case elfcpp::R_POWERPC_REL16
:
6016 case elfcpp::R_POWERPC_REL16_LO
:
6017 case elfcpp::R_POWERPC_REL16_HI
:
6018 case elfcpp::R_POWERPC_REL16_HA
:
6019 case elfcpp::R_POWERPC_REL14
:
6020 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6021 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6025 case elfcpp::R_PPC64_TOC16
:
6026 case elfcpp::R_PPC64_TOC16_LO
:
6027 case elfcpp::R_PPC64_TOC16_HI
:
6028 case elfcpp::R_PPC64_TOC16_HA
:
6029 case elfcpp::R_PPC64_TOC16_DS
:
6030 case elfcpp::R_PPC64_TOC16_LO_DS
:
6031 // Subtract the TOC base address.
6032 value
-= (target
->got_section()->output_section()->address()
6033 + object
->toc_base_offset());
6036 case elfcpp::R_POWERPC_SECTOFF
:
6037 case elfcpp::R_POWERPC_SECTOFF_LO
:
6038 case elfcpp::R_POWERPC_SECTOFF_HI
:
6039 case elfcpp::R_POWERPC_SECTOFF_HA
:
6040 case elfcpp::R_PPC64_SECTOFF_DS
:
6041 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6043 value
-= os
->address();
6046 case elfcpp::R_PPC64_TPREL16_DS
:
6047 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6049 // R_PPC_TLSGD and R_PPC_TLSLD
6051 case elfcpp::R_POWERPC_TPREL16
:
6052 case elfcpp::R_POWERPC_TPREL16_LO
:
6053 case elfcpp::R_POWERPC_TPREL16_HI
:
6054 case elfcpp::R_POWERPC_TPREL16_HA
:
6055 case elfcpp::R_POWERPC_TPREL
:
6056 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6057 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6058 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6059 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6060 // tls symbol values are relative to tls_segment()->vaddr()
6064 case elfcpp::R_PPC64_DTPREL16_DS
:
6065 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6066 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6067 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6068 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6069 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6071 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6072 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6074 case elfcpp::R_POWERPC_DTPREL16
:
6075 case elfcpp::R_POWERPC_DTPREL16_LO
:
6076 case elfcpp::R_POWERPC_DTPREL16_HI
:
6077 case elfcpp::R_POWERPC_DTPREL16_HA
:
6078 case elfcpp::R_POWERPC_DTPREL
:
6079 // tls symbol values are relative to tls_segment()->vaddr()
6080 value
-= dtp_offset
;
6087 Insn branch_bit
= 0;
6090 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6091 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6092 branch_bit
= 1 << 21;
6093 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6094 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6096 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6097 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6100 if (this->is_isa_v2
)
6102 // Set 'a' bit. This is 0b00010 in BO field for branch
6103 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6104 // for branch on CTR insns (BO == 1a00t or 1a01t).
6105 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6107 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6114 // Invert 'y' bit if not the default.
6115 if (static_cast<Signed_address
>(value
) < 0)
6118 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6128 // Multi-instruction sequences that access the TOC can be
6129 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6130 // to nop; addi rb,r2,x;
6136 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6137 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6138 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6139 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6140 case elfcpp::R_POWERPC_GOT16_HA
:
6141 case elfcpp::R_PPC64_TOC16_HA
:
6142 if (parameters
->options().toc_optimize())
6144 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6145 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6146 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6147 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6148 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6149 _("toc optimization is not supported "
6150 "for %#08x instruction"), insn
);
6151 else if (value
+ 0x8000 < 0x10000)
6153 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6159 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6160 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6161 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6162 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6163 case elfcpp::R_POWERPC_GOT16_LO
:
6164 case elfcpp::R_PPC64_GOT16_LO_DS
:
6165 case elfcpp::R_PPC64_TOC16_LO
:
6166 case elfcpp::R_PPC64_TOC16_LO_DS
:
6167 if (parameters
->options().toc_optimize())
6169 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6170 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6171 if (!ok_lo_toc_insn(insn
))
6172 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6173 _("toc optimization is not supported "
6174 "for %#08x instruction"), insn
);
6175 else if (value
+ 0x8000 < 0x10000)
6177 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6179 // Transform addic to addi when we change reg.
6180 insn
&= ~((0x3f << 26) | (0x1f << 16));
6181 insn
|= (14u << 26) | (2 << 16);
6185 insn
&= ~(0x1f << 16);
6188 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6195 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6198 case elfcpp::R_POWERPC_ADDR32
:
6199 case elfcpp::R_POWERPC_UADDR32
:
6201 overflow
= Reloc::CHECK_BITFIELD
;
6204 case elfcpp::R_POWERPC_REL32
:
6206 overflow
= Reloc::CHECK_SIGNED
;
6209 case elfcpp::R_POWERPC_ADDR24
:
6210 case elfcpp::R_POWERPC_ADDR16
:
6211 case elfcpp::R_POWERPC_UADDR16
:
6212 case elfcpp::R_PPC64_ADDR16_DS
:
6213 case elfcpp::R_POWERPC_ADDR14
:
6214 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6215 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6216 overflow
= Reloc::CHECK_BITFIELD
;
6219 case elfcpp::R_POWERPC_REL24
:
6220 case elfcpp::R_PPC_PLTREL24
:
6221 case elfcpp::R_PPC_LOCAL24PC
:
6222 case elfcpp::R_POWERPC_REL16
:
6223 case elfcpp::R_PPC64_TOC16
:
6224 case elfcpp::R_POWERPC_GOT16
:
6225 case elfcpp::R_POWERPC_SECTOFF
:
6226 case elfcpp::R_POWERPC_TPREL16
:
6227 case elfcpp::R_POWERPC_DTPREL16
:
6228 case elfcpp::R_PPC64_TPREL16_DS
:
6229 case elfcpp::R_PPC64_DTPREL16_DS
:
6230 case elfcpp::R_PPC64_TOC16_DS
:
6231 case elfcpp::R_PPC64_GOT16_DS
:
6232 case elfcpp::R_PPC64_SECTOFF_DS
:
6233 case elfcpp::R_POWERPC_REL14
:
6234 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6235 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6236 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6237 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6238 case elfcpp::R_POWERPC_GOT_TPREL16
:
6239 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6240 overflow
= Reloc::CHECK_SIGNED
;
6244 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6245 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6248 case elfcpp::R_POWERPC_NONE
:
6249 case elfcpp::R_POWERPC_TLS
:
6250 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6251 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6252 case elfcpp::R_PPC_EMB_MRKREF
:
6255 case elfcpp::R_PPC64_ADDR64
:
6256 case elfcpp::R_PPC64_REL64
:
6257 case elfcpp::R_PPC64_TOC
:
6258 Reloc::addr64(view
, value
);
6261 case elfcpp::R_POWERPC_TPREL
:
6262 case elfcpp::R_POWERPC_DTPREL
:
6264 Reloc::addr64(view
, value
);
6266 status
= Reloc::addr32(view
, value
, overflow
);
6269 case elfcpp::R_PPC64_UADDR64
:
6270 Reloc::addr64_u(view
, value
);
6273 case elfcpp::R_POWERPC_ADDR32
:
6274 status
= Reloc::addr32(view
, value
, overflow
);
6277 case elfcpp::R_POWERPC_REL32
:
6278 case elfcpp::R_POWERPC_UADDR32
:
6279 status
= Reloc::addr32_u(view
, value
, overflow
);
6282 case elfcpp::R_POWERPC_ADDR24
:
6283 case elfcpp::R_POWERPC_REL24
:
6284 case elfcpp::R_PPC_PLTREL24
:
6285 case elfcpp::R_PPC_LOCAL24PC
:
6286 status
= Reloc::addr24(view
, value
, overflow
);
6289 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6290 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6293 status
= Reloc::addr16_ds(view
, value
, overflow
);
6296 case elfcpp::R_POWERPC_ADDR16
:
6297 case elfcpp::R_POWERPC_REL16
:
6298 case elfcpp::R_PPC64_TOC16
:
6299 case elfcpp::R_POWERPC_GOT16
:
6300 case elfcpp::R_POWERPC_SECTOFF
:
6301 case elfcpp::R_POWERPC_TPREL16
:
6302 case elfcpp::R_POWERPC_DTPREL16
:
6303 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6304 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6305 case elfcpp::R_POWERPC_GOT_TPREL16
:
6306 case elfcpp::R_POWERPC_ADDR16_LO
:
6307 case elfcpp::R_POWERPC_REL16_LO
:
6308 case elfcpp::R_PPC64_TOC16_LO
:
6309 case elfcpp::R_POWERPC_GOT16_LO
:
6310 case elfcpp::R_POWERPC_SECTOFF_LO
:
6311 case elfcpp::R_POWERPC_TPREL16_LO
:
6312 case elfcpp::R_POWERPC_DTPREL16_LO
:
6313 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6314 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6315 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6316 status
= Reloc::addr16(view
, value
, overflow
);
6319 case elfcpp::R_POWERPC_UADDR16
:
6320 status
= Reloc::addr16_u(view
, value
, overflow
);
6323 case elfcpp::R_POWERPC_ADDR16_HI
:
6324 case elfcpp::R_POWERPC_REL16_HI
:
6325 case elfcpp::R_PPC64_TOC16_HI
:
6326 case elfcpp::R_POWERPC_GOT16_HI
:
6327 case elfcpp::R_POWERPC_SECTOFF_HI
:
6328 case elfcpp::R_POWERPC_TPREL16_HI
:
6329 case elfcpp::R_POWERPC_DTPREL16_HI
:
6330 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6331 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6332 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6333 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6334 Reloc::addr16_hi(view
, value
);
6337 case elfcpp::R_POWERPC_ADDR16_HA
:
6338 case elfcpp::R_POWERPC_REL16_HA
:
6339 case elfcpp::R_PPC64_TOC16_HA
:
6340 case elfcpp::R_POWERPC_GOT16_HA
:
6341 case elfcpp::R_POWERPC_SECTOFF_HA
:
6342 case elfcpp::R_POWERPC_TPREL16_HA
:
6343 case elfcpp::R_POWERPC_DTPREL16_HA
:
6344 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6345 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6346 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6347 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6348 Reloc::addr16_ha(view
, value
);
6351 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6353 // R_PPC_EMB_NADDR16_LO
6355 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6356 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6357 Reloc::addr16_hi2(view
, value
);
6360 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6362 // R_PPC_EMB_NADDR16_HI
6364 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6365 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6366 Reloc::addr16_ha2(view
, value
);
6369 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6371 // R_PPC_EMB_NADDR16_HA
6373 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6374 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6375 Reloc::addr16_hi3(view
, value
);
6378 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6382 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6383 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6384 Reloc::addr16_ha3(view
, value
);
6387 case elfcpp::R_PPC64_DTPREL16_DS
:
6388 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6390 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6392 case elfcpp::R_PPC64_TPREL16_DS
:
6393 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6395 // R_PPC_TLSGD, R_PPC_TLSLD
6397 case elfcpp::R_PPC64_ADDR16_DS
:
6398 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6399 case elfcpp::R_PPC64_TOC16_DS
:
6400 case elfcpp::R_PPC64_TOC16_LO_DS
:
6401 case elfcpp::R_PPC64_GOT16_DS
:
6402 case elfcpp::R_PPC64_GOT16_LO_DS
:
6403 case elfcpp::R_PPC64_SECTOFF_DS
:
6404 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6405 status
= Reloc::addr16_ds(view
, value
, overflow
);
6408 case elfcpp::R_POWERPC_ADDR14
:
6409 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6410 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6411 case elfcpp::R_POWERPC_REL14
:
6412 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6413 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6414 status
= Reloc::addr14(view
, value
, overflow
);
6417 case elfcpp::R_POWERPC_COPY
:
6418 case elfcpp::R_POWERPC_GLOB_DAT
:
6419 case elfcpp::R_POWERPC_JMP_SLOT
:
6420 case elfcpp::R_POWERPC_RELATIVE
:
6421 case elfcpp::R_POWERPC_DTPMOD
:
6422 case elfcpp::R_PPC64_JMP_IREL
:
6423 case elfcpp::R_POWERPC_IRELATIVE
:
6424 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6425 _("unexpected reloc %u in object file"),
6429 case elfcpp::R_PPC_EMB_SDA21
:
6434 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6438 case elfcpp::R_PPC_EMB_SDA2I16
:
6439 case elfcpp::R_PPC_EMB_SDA2REL
:
6442 // R_PPC64_TLSGD, R_PPC64_TLSLD
6445 case elfcpp::R_POWERPC_PLT32
:
6446 case elfcpp::R_POWERPC_PLTREL32
:
6447 case elfcpp::R_POWERPC_PLT16_LO
:
6448 case elfcpp::R_POWERPC_PLT16_HI
:
6449 case elfcpp::R_POWERPC_PLT16_HA
:
6450 case elfcpp::R_PPC_SDAREL16
:
6451 case elfcpp::R_POWERPC_ADDR30
:
6452 case elfcpp::R_PPC64_PLT64
:
6453 case elfcpp::R_PPC64_PLTREL64
:
6454 case elfcpp::R_PPC64_PLTGOT16
:
6455 case elfcpp::R_PPC64_PLTGOT16_LO
:
6456 case elfcpp::R_PPC64_PLTGOT16_HI
:
6457 case elfcpp::R_PPC64_PLTGOT16_HA
:
6458 case elfcpp::R_PPC64_PLT16_LO_DS
:
6459 case elfcpp::R_PPC64_PLTGOT16_DS
:
6460 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
6461 case elfcpp::R_PPC_EMB_RELSEC16
:
6462 case elfcpp::R_PPC_EMB_RELST_LO
:
6463 case elfcpp::R_PPC_EMB_RELST_HI
:
6464 case elfcpp::R_PPC_EMB_RELST_HA
:
6465 case elfcpp::R_PPC_EMB_BIT_FLD
:
6466 case elfcpp::R_PPC_EMB_RELSDA
:
6467 case elfcpp::R_PPC_TOC16
:
6470 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6471 _("unsupported reloc %u"),
6475 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
6476 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6477 _("relocation overflow"));
6482 // Relocate section data.
6484 template<int size
, bool big_endian
>
6486 Target_powerpc
<size
, big_endian
>::relocate_section(
6487 const Relocate_info
<size
, big_endian
>* relinfo
,
6488 unsigned int sh_type
,
6489 const unsigned char* prelocs
,
6491 Output_section
* output_section
,
6492 bool needs_special_offset_handling
,
6493 unsigned char* view
,
6495 section_size_type view_size
,
6496 const Reloc_symbol_changes
* reloc_symbol_changes
)
6498 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6499 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
6500 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
6501 Powerpc_comdat_behavior
;
6503 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6505 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
6506 Powerpc_relocate
, Powerpc_comdat_behavior
>(
6512 needs_special_offset_handling
,
6516 reloc_symbol_changes
);
6519 class Powerpc_scan_relocatable_reloc
6522 // Return the strategy to use for a local symbol which is not a
6523 // section symbol, given the relocation type.
6524 inline Relocatable_relocs::Reloc_strategy
6525 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
6527 if (r_type
== 0 && r_sym
== 0)
6528 return Relocatable_relocs::RELOC_DISCARD
;
6529 return Relocatable_relocs::RELOC_COPY
;
6532 // Return the strategy to use for a local symbol which is a section
6533 // symbol, given the relocation type.
6534 inline Relocatable_relocs::Reloc_strategy
6535 local_section_strategy(unsigned int, Relobj
*)
6537 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
6540 // Return the strategy to use for a global symbol, given the
6541 // relocation type, the object, and the symbol index.
6542 inline Relocatable_relocs::Reloc_strategy
6543 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
6545 if (r_type
== elfcpp::R_PPC_PLTREL24
)
6546 return Relocatable_relocs::RELOC_SPECIAL
;
6547 return Relocatable_relocs::RELOC_COPY
;
6551 // Scan the relocs during a relocatable link.
6553 template<int size
, bool big_endian
>
6555 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
6556 Symbol_table
* symtab
,
6558 Sized_relobj_file
<size
, big_endian
>* object
,
6559 unsigned int data_shndx
,
6560 unsigned int sh_type
,
6561 const unsigned char* prelocs
,
6563 Output_section
* output_section
,
6564 bool needs_special_offset_handling
,
6565 size_t local_symbol_count
,
6566 const unsigned char* plocal_symbols
,
6567 Relocatable_relocs
* rr
)
6569 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6571 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
6572 Powerpc_scan_relocatable_reloc
>(
6580 needs_special_offset_handling
,
6586 // Emit relocations for a section.
6587 // This is a modified version of the function by the same name in
6588 // target-reloc.h. Using relocate_special_relocatable for
6589 // R_PPC_PLTREL24 would require duplication of the entire body of the
6590 // loop, so we may as well duplicate the whole thing.
6592 template<int size
, bool big_endian
>
6594 Target_powerpc
<size
, big_endian
>::relocate_relocs(
6595 const Relocate_info
<size
, big_endian
>* relinfo
,
6596 unsigned int sh_type
,
6597 const unsigned char* prelocs
,
6599 Output_section
* output_section
,
6600 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
6601 const Relocatable_relocs
* rr
,
6603 Address view_address
,
6605 unsigned char* reloc_view
,
6606 section_size_type reloc_view_size
)
6608 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6610 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
6612 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
6614 const int reloc_size
6615 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
6617 Powerpc_relobj
<size
, big_endian
>* const object
6618 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6619 const unsigned int local_count
= object
->local_symbol_count();
6620 unsigned int got2_shndx
= object
->got2_shndx();
6621 Address got2_addend
= 0;
6622 if (got2_shndx
!= 0)
6624 got2_addend
= object
->get_output_section_offset(got2_shndx
);
6625 gold_assert(got2_addend
!= invalid_address
);
6628 unsigned char* pwrite
= reloc_view
;
6629 bool zap_next
= false;
6630 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
6632 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
6633 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
6636 Reltype
reloc(prelocs
);
6637 Reltype_write
reloc_write(pwrite
);
6639 Address offset
= reloc
.get_r_offset();
6640 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
6641 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
6642 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
6643 const unsigned int orig_r_sym
= r_sym
;
6644 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
6645 = reloc
.get_r_addend();
6646 const Symbol
* gsym
= NULL
;
6650 // We could arrange to discard these and other relocs for
6651 // tls optimised sequences in the strategy methods, but for
6652 // now do as BFD ld does.
6653 r_type
= elfcpp::R_POWERPC_NONE
;
6657 // Get the new symbol index.
6658 if (r_sym
< local_count
)
6662 case Relocatable_relocs::RELOC_COPY
:
6663 case Relocatable_relocs::RELOC_SPECIAL
:
6666 r_sym
= object
->symtab_index(r_sym
);
6667 gold_assert(r_sym
!= -1U);
6671 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
6673 // We are adjusting a section symbol. We need to find
6674 // the symbol table index of the section symbol for
6675 // the output section corresponding to input section
6676 // in which this symbol is defined.
6677 gold_assert(r_sym
< local_count
);
6679 unsigned int shndx
=
6680 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
6681 gold_assert(is_ordinary
);
6682 Output_section
* os
= object
->output_section(shndx
);
6683 gold_assert(os
!= NULL
);
6684 gold_assert(os
->needs_symtab_index());
6685 r_sym
= os
->symtab_index();
6695 gsym
= object
->global_symbol(r_sym
);
6696 gold_assert(gsym
!= NULL
);
6697 if (gsym
->is_forwarder())
6698 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
6700 gold_assert(gsym
->has_symtab_index());
6701 r_sym
= gsym
->symtab_index();
6704 // Get the new offset--the location in the output section where
6705 // this relocation should be applied.
6706 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6707 offset
+= offset_in_output_section
;
6710 section_offset_type sot_offset
=
6711 convert_types
<section_offset_type
, Address
>(offset
);
6712 section_offset_type new_sot_offset
=
6713 output_section
->output_offset(object
, relinfo
->data_shndx
,
6715 gold_assert(new_sot_offset
!= -1);
6716 offset
= new_sot_offset
;
6719 // In an object file, r_offset is an offset within the section.
6720 // In an executable or dynamic object, generated by
6721 // --emit-relocs, r_offset is an absolute address.
6722 if (!parameters
->options().relocatable())
6724 offset
+= view_address
;
6725 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6726 offset
-= offset_in_output_section
;
6729 // Handle the reloc addend based on the strategy.
6730 if (strategy
== Relocatable_relocs::RELOC_COPY
)
6732 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
6734 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
6735 addend
= psymval
->value(object
, addend
);
6737 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
6739 if (addend
>= 32768)
6740 addend
+= got2_addend
;
6745 if (!parameters
->options().relocatable())
6747 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6748 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6749 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6750 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6752 // First instruction of a global dynamic sequence,
6754 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6755 switch (this->optimize_tls_gd(final
))
6757 case tls::TLSOPT_TO_IE
:
6758 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6759 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6761 case tls::TLSOPT_TO_LE
:
6762 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6763 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6764 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6767 r_type
= elfcpp::R_POWERPC_NONE
;
6768 offset
-= 2 * big_endian
;
6775 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6776 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6777 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6778 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6780 // First instruction of a local dynamic sequence,
6782 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6784 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6785 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6787 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6788 const Output_section
* os
= relinfo
->layout
->tls_segment()
6790 gold_assert(os
!= NULL
);
6791 gold_assert(os
->needs_symtab_index());
6792 r_sym
= os
->symtab_index();
6793 addend
= dtp_offset
;
6797 r_type
= elfcpp::R_POWERPC_NONE
;
6798 offset
-= 2 * big_endian
;
6802 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6803 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6804 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6805 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6807 // First instruction of initial exec sequence.
6808 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6809 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6811 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6812 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6813 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6816 r_type
= elfcpp::R_POWERPC_NONE
;
6817 offset
-= 2 * big_endian
;
6821 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6822 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6824 // Second instruction of a global dynamic sequence,
6825 // the __tls_get_addr call
6826 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6827 switch (this->optimize_tls_gd(final
))
6829 case tls::TLSOPT_TO_IE
:
6830 r_type
= elfcpp::R_POWERPC_NONE
;
6833 case tls::TLSOPT_TO_LE
:
6834 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6835 offset
+= 2 * big_endian
;
6842 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6843 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6845 // Second instruction of a local dynamic sequence,
6846 // the __tls_get_addr call
6847 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6849 const Output_section
* os
= relinfo
->layout
->tls_segment()
6851 gold_assert(os
!= NULL
);
6852 gold_assert(os
->needs_symtab_index());
6853 r_sym
= os
->symtab_index();
6854 addend
= dtp_offset
;
6855 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6856 offset
+= 2 * big_endian
;
6860 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6862 // Second instruction of an initial exec sequence
6863 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6864 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6866 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6867 offset
+= 2 * big_endian
;
6872 reloc_write
.put_r_offset(offset
);
6873 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
6874 reloc_write
.put_r_addend(addend
);
6876 pwrite
+= reloc_size
;
6879 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
6880 == reloc_view_size
);
6883 // Return the value to use for a dynamic symbol which requires special
6884 // treatment. This is how we support equality comparisons of function
6885 // pointers across shared library boundaries, as described in the
6886 // processor specific ABI supplement.
6888 template<int size
, bool big_endian
>
6890 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
6894 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
6895 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
6896 p
!= this->stub_tables_
.end();
6899 Address off
= (*p
)->find_plt_call_entry(gsym
);
6900 if (off
!= invalid_address
)
6901 return (*p
)->stub_address() + off
;
6907 // Return the PLT address to use for a local symbol.
6908 template<int size
, bool big_endian
>
6910 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
6911 const Relobj
* object
,
6912 unsigned int symndx
) const
6916 const Sized_relobj
<size
, big_endian
>* relobj
6917 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
6918 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
6919 p
!= this->stub_tables_
.end();
6922 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
6924 if (off
!= invalid_address
)
6925 return (*p
)->stub_address() + off
;
6931 // Return the PLT address to use for a global symbol.
6932 template<int size
, bool big_endian
>
6934 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
6935 const Symbol
* gsym
) const
6939 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
6940 p
!= this->stub_tables_
.end();
6943 Address off
= (*p
)->find_plt_call_entry(gsym
);
6944 if (off
!= invalid_address
)
6945 return (*p
)->stub_address() + off
;
6951 // Return the offset to use for the GOT_INDX'th got entry which is
6952 // for a local tls symbol specified by OBJECT, SYMNDX.
6953 template<int size
, bool big_endian
>
6955 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
6956 const Relobj
* object
,
6957 unsigned int symndx
,
6958 unsigned int got_indx
) const
6960 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6961 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
6962 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
6964 for (Got_type got_type
= GOT_TYPE_TLSGD
;
6965 got_type
<= GOT_TYPE_TPREL
;
6966 got_type
= Got_type(got_type
+ 1))
6967 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
6969 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
6970 if (got_type
== GOT_TYPE_TLSGD
)
6972 if (off
== got_indx
* (size
/ 8))
6974 if (got_type
== GOT_TYPE_TPREL
)
6984 // Return the offset to use for the GOT_INDX'th got entry which is
6985 // for global tls symbol GSYM.
6986 template<int size
, bool big_endian
>
6988 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
6990 unsigned int got_indx
) const
6992 if (gsym
->type() == elfcpp::STT_TLS
)
6994 for (Got_type got_type
= GOT_TYPE_TLSGD
;
6995 got_type
<= GOT_TYPE_TPREL
;
6996 got_type
= Got_type(got_type
+ 1))
6997 if (gsym
->has_got_offset(got_type
))
6999 unsigned int off
= gsym
->got_offset(got_type
);
7000 if (got_type
== GOT_TYPE_TLSGD
)
7002 if (off
== got_indx
* (size
/ 8))
7004 if (got_type
== GOT_TYPE_TPREL
)
7014 // The selector for powerpc object files.
7016 template<int size
, bool big_endian
>
7017 class Target_selector_powerpc
: public Target_selector
7020 Target_selector_powerpc()
7021 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
7024 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
7025 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
7027 ? (big_endian
? "elf64ppc" : "elf64lppc")
7028 : (big_endian
? "elf32ppc" : "elf32lppc")))
7032 do_instantiate_target()
7033 { return new Target_powerpc
<size
, big_endian
>(); }
7036 Target_selector_powerpc
<32, true> target_selector_ppc32
;
7037 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
7038 Target_selector_powerpc
<64, true> target_selector_ppc64
;
7039 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
7041 // Instantiate these constants for -O0
7042 template<int size
, bool big_endian
>
7043 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
7044 template<int size
, bool big_endian
>
7045 const typename Stub_table
<size
, big_endian
>::Address
7046 Stub_table
<size
, big_endian
>::invalid_address
;
7047 template<int size
, bool big_endian
>
7048 const typename Target_powerpc
<size
, big_endian
>::Address
7049 Target_powerpc
<size
, big_endian
>::invalid_address
;
7051 } // End anonymous namespace.