1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2018 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
65 template<int size
, bool big_endian
>
66 class Output_data_save_res
;
68 template<int size
, bool big_endian
>
71 struct Stub_table_owner
74 : output_section(NULL
), owner(NULL
)
77 Output_section
* output_section
;
78 const Output_section::Input_section
* owner
;
82 is_branch_reloc(unsigned int r_type
);
84 // Counter incremented on every Powerpc_relobj constructed.
85 static uint32_t object_id
= 0;
87 template<int size
, bool big_endian
>
88 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
91 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
92 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
93 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
95 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
96 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
97 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
98 uniq_(object_id
++), special_(0), relatoc_(0), toc_(0),
99 has_small_toc_reloc_(false), opd_valid_(false),
100 e_flags_(ehdr
.get_e_flags()), no_toc_opt_(), opd_ent_(),
101 access_from_map_(), has14_(), stub_table_index_(), st_other_()
103 this->set_abiversion(0);
109 // Read the symbols then set up st_other vector.
111 do_read_symbols(Read_symbols_data
*);
113 // Arrange to always relocate .toc first.
115 do_relocate_sections(
116 const Symbol_table
* symtab
, const Layout
* layout
,
117 const unsigned char* pshdrs
, Output_file
* of
,
118 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
);
120 // The .toc section index.
127 // Mark .toc entry at OFF as not optimizable.
129 set_no_toc_opt(Address off
)
131 if (this->no_toc_opt_
.empty())
132 this->no_toc_opt_
.resize(this->section_size(this->toc_shndx())
135 if (off
< this->no_toc_opt_
.size())
136 this->no_toc_opt_
[off
] = true;
139 // Mark the entire .toc as not optimizable.
143 this->no_toc_opt_
.resize(1);
144 this->no_toc_opt_
[0] = true;
147 // Return true if code using the .toc entry at OFF should not be edited.
149 no_toc_opt(Address off
) const
151 if (this->no_toc_opt_
.empty())
154 if (off
>= this->no_toc_opt_
.size())
156 return this->no_toc_opt_
[off
];
159 // The .got2 section shndx.
164 return this->special_
;
169 // The .opd section shndx.
176 return this->special_
;
179 // Init OPD entry arrays.
181 init_opd(size_t opd_size
)
183 size_t count
= this->opd_ent_ndx(opd_size
);
184 this->opd_ent_
.resize(count
);
187 // Return section and offset of function entry for .opd + R_OFF.
189 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
191 size_t ndx
= this->opd_ent_ndx(r_off
);
192 gold_assert(ndx
< this->opd_ent_
.size());
193 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
195 *value
= this->opd_ent_
[ndx
].off
;
196 return this->opd_ent_
[ndx
].shndx
;
199 // Set section and offset of function entry for .opd + R_OFF.
201 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
203 size_t ndx
= this->opd_ent_ndx(r_off
);
204 gold_assert(ndx
< this->opd_ent_
.size());
205 this->opd_ent_
[ndx
].shndx
= shndx
;
206 this->opd_ent_
[ndx
].off
= value
;
209 // Return discard flag for .opd + R_OFF.
211 get_opd_discard(Address r_off
) const
213 size_t ndx
= this->opd_ent_ndx(r_off
);
214 gold_assert(ndx
< this->opd_ent_
.size());
215 return this->opd_ent_
[ndx
].discard
;
218 // Set discard flag for .opd + R_OFF.
220 set_opd_discard(Address r_off
)
222 size_t ndx
= this->opd_ent_ndx(r_off
);
223 gold_assert(ndx
< this->opd_ent_
.size());
224 this->opd_ent_
[ndx
].discard
= true;
229 { return this->opd_valid_
; }
233 { this->opd_valid_
= true; }
235 // Examine .rela.opd to build info about function entry points.
237 scan_opd_relocs(size_t reloc_count
,
238 const unsigned char* prelocs
,
239 const unsigned char* plocal_syms
);
241 // Returns true if a code sequence loading a TOC entry can be
242 // converted into code calculating a TOC pointer relative offset.
244 make_toc_relative(Target_powerpc
<size
, big_endian
>* target
,
247 // Perform the Sized_relobj_file method, then set up opd info from
250 do_read_relocs(Read_relocs_data
*);
253 do_find_special_sections(Read_symbols_data
* sd
);
255 // Adjust this local symbol value. Return false if the symbol
256 // should be discarded from the output file.
258 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
260 if (size
== 64 && this->opd_shndx() != 0)
263 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
265 if (this->get_opd_discard(lv
->input_value()))
273 { return &this->access_from_map_
; }
275 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
276 // section at DST_OFF.
278 add_reference(Relobj
* src_obj
,
279 unsigned int src_indx
,
280 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
282 Section_id
src_id(src_obj
, src_indx
);
283 this->access_from_map_
[dst_off
].insert(src_id
);
286 // Add a reference to the code section specified by the .opd entry
289 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
291 size_t ndx
= this->opd_ent_ndx(dst_off
);
292 if (ndx
>= this->opd_ent_
.size())
293 this->opd_ent_
.resize(ndx
+ 1);
294 this->opd_ent_
[ndx
].gc_mark
= true;
298 process_gc_mark(Symbol_table
* symtab
)
300 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
301 if (this->opd_ent_
[i
].gc_mark
)
303 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
304 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
308 // Return offset in output GOT section that this object will use
309 // as a TOC pointer. Won't be just a constant with multi-toc support.
311 toc_base_offset() const
315 set_has_small_toc_reloc()
316 { has_small_toc_reloc_
= true; }
319 has_small_toc_reloc() const
320 { return has_small_toc_reloc_
; }
323 set_has_14bit_branch(unsigned int shndx
)
325 if (shndx
>= this->has14_
.size())
326 this->has14_
.resize(shndx
+ 1);
327 this->has14_
[shndx
] = true;
331 has_14bit_branch(unsigned int shndx
) const
332 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
335 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
337 if (shndx
>= this->stub_table_index_
.size())
338 this->stub_table_index_
.resize(shndx
+ 1, -1);
339 this->stub_table_index_
[shndx
] = stub_index
;
342 Stub_table
<size
, big_endian
>*
343 stub_table(unsigned int shndx
)
345 if (shndx
< this->stub_table_index_
.size())
347 Target_powerpc
<size
, big_endian
>* target
348 = static_cast<Target_powerpc
<size
, big_endian
>*>(
349 parameters
->sized_target
<size
, big_endian
>());
350 unsigned int indx
= this->stub_table_index_
[shndx
];
351 if (indx
< target
->stub_tables().size())
352 return target
->stub_tables()[indx
];
360 this->stub_table_index_
.clear();
365 { return this->uniq_
; }
369 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
371 // Set ABI version for input and output
373 set_abiversion(int ver
);
376 st_other (unsigned int symndx
) const
378 return this->st_other_
[symndx
];
382 ppc64_local_entry_offset(const Symbol
* sym
) const
383 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
386 ppc64_local_entry_offset(unsigned int symndx
) const
387 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
398 // Return index into opd_ent_ array for .opd entry at OFF.
399 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
400 // apart when the language doesn't use the last 8-byte word, the
401 // environment pointer. Thus dividing the entry section offset by
402 // 16 will give an index into opd_ent_ that works for either layout
403 // of .opd. (It leaves some elements of the vector unused when .opd
404 // entries are spaced 24 bytes apart, but we don't know the spacing
405 // until relocations are processed, and in any case it is possible
406 // for an object to have some entries spaced 16 bytes apart and
407 // others 24 bytes apart.)
409 opd_ent_ndx(size_t off
) const
412 // Per object unique identifier
415 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
416 unsigned int special_
;
418 // For 64-bit the .rela.toc and .toc section shdnx.
419 unsigned int relatoc_
;
422 // For 64-bit, whether this object uses small model relocs to access
424 bool has_small_toc_reloc_
;
426 // Set at the start of gc_process_relocs, when we know opd_ent_
427 // vector is valid. The flag could be made atomic and set in
428 // do_read_relocs with memory_order_release and then tested with
429 // memory_order_acquire, potentially resulting in fewer entries in
434 elfcpp::Elf_Word e_flags_
;
436 // For 64-bit, an array with one entry per 64-bit word in the .toc
437 // section, set if accesses using that word cannot be optimised.
438 std::vector
<bool> no_toc_opt_
;
440 // The first 8-byte word of an OPD entry gives the address of the
441 // entry point of the function. Relocatable object files have a
442 // relocation on this word. The following vector records the
443 // section and offset specified by these relocations.
444 std::vector
<Opd_ent
> opd_ent_
;
446 // References made to this object's .opd section when running
447 // gc_process_relocs for another object, before the opd_ent_ vector
448 // is valid for this object.
449 Access_from access_from_map_
;
451 // Whether input section has a 14-bit branch reloc.
452 std::vector
<bool> has14_
;
454 // The stub table to use for a given input section.
455 std::vector
<unsigned int> stub_table_index_
;
457 // ELF st_other field for local symbols.
458 std::vector
<unsigned char> st_other_
;
461 template<int size
, bool big_endian
>
462 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
465 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
467 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
468 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
469 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
470 opd_shndx_(0), e_flags_(ehdr
.get_e_flags()), opd_ent_()
472 this->set_abiversion(0);
478 // Call Sized_dynobj::do_read_symbols to read the symbols then
479 // read .opd from a dynamic object, filling in opd_ent_ vector,
481 do_read_symbols(Read_symbols_data
*);
483 // The .opd section shndx.
487 return this->opd_shndx_
;
490 // The .opd section address.
494 return this->opd_address_
;
497 // Init OPD entry arrays.
499 init_opd(size_t opd_size
)
501 size_t count
= this->opd_ent_ndx(opd_size
);
502 this->opd_ent_
.resize(count
);
505 // Return section and offset of function entry for .opd + R_OFF.
507 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
509 size_t ndx
= this->opd_ent_ndx(r_off
);
510 gold_assert(ndx
< this->opd_ent_
.size());
511 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
513 *value
= this->opd_ent_
[ndx
].off
;
514 return this->opd_ent_
[ndx
].shndx
;
517 // Set section and offset of function entry for .opd + R_OFF.
519 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
521 size_t ndx
= this->opd_ent_ndx(r_off
);
522 gold_assert(ndx
< this->opd_ent_
.size());
523 this->opd_ent_
[ndx
].shndx
= shndx
;
524 this->opd_ent_
[ndx
].off
= value
;
529 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
531 // Set ABI version for input and output.
533 set_abiversion(int ver
);
536 // Used to specify extent of executable sections.
539 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
540 : start(start_
), len(len_
), shndx(shndx_
)
544 operator<(const Sec_info
& that
) const
545 { return this->start
< that
.start
; }
558 // Return index into opd_ent_ array for .opd entry at OFF.
560 opd_ent_ndx(size_t off
) const
563 // For 64-bit the .opd section shndx and address.
564 unsigned int opd_shndx_
;
565 Address opd_address_
;
568 elfcpp::Elf_Word e_flags_
;
570 // The first 8-byte word of an OPD entry gives the address of the
571 // entry point of the function. Records the section and offset
572 // corresponding to the address. Note that in dynamic objects,
573 // offset is *not* relative to the section.
574 std::vector
<Opd_ent
> opd_ent_
;
577 // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
578 // base class will emit.
580 template<int sh_type
, int size
, bool big_endian
>
581 class Powerpc_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
584 Powerpc_copy_relocs()
585 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_POWERPC_COPY
)
588 // Emit any saved relocations which turn out to be needed. This is
589 // called after all the relocs have been scanned.
591 emit(Output_data_reloc
<sh_type
, true, size
, big_endian
>*);
594 template<int size
, bool big_endian
>
595 class Target_powerpc
: public Sized_target
<size
, big_endian
>
599 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
600 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
601 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
602 typedef Unordered_set
<Symbol_location
, Symbol_location_hash
> Tocsave_loc
;
603 static const Address invalid_address
= static_cast<Address
>(0) - 1;
604 // Offset of tp and dtp pointers from start of TLS block.
605 static const Address tp_offset
= 0x7000;
606 static const Address dtp_offset
= 0x8000;
609 : Sized_target
<size
, big_endian
>(&powerpc_info
),
610 got_(NULL
), plt_(NULL
), iplt_(NULL
), lplt_(NULL
), brlt_section_(NULL
),
611 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(),
612 tlsld_got_offset_(-1U),
613 stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(),
614 plt_thread_safe_(false), plt_localentry0_(false),
615 plt_localentry0_init_(false), has_localentry0_(false),
616 has_tls_get_addr_opt_(false),
617 relax_failed_(false), relax_fail_count_(0),
618 stub_group_size_(0), savres_section_(0),
619 tls_get_addr_(NULL
), tls_get_addr_opt_(NULL
)
623 // Process the relocations to determine unreferenced sections for
624 // garbage collection.
626 gc_process_relocs(Symbol_table
* symtab
,
628 Sized_relobj_file
<size
, big_endian
>* object
,
629 unsigned int data_shndx
,
630 unsigned int sh_type
,
631 const unsigned char* prelocs
,
633 Output_section
* output_section
,
634 bool needs_special_offset_handling
,
635 size_t local_symbol_count
,
636 const unsigned char* plocal_symbols
);
638 // Scan the relocations to look for symbol adjustments.
640 scan_relocs(Symbol_table
* symtab
,
642 Sized_relobj_file
<size
, big_endian
>* object
,
643 unsigned int data_shndx
,
644 unsigned int sh_type
,
645 const unsigned char* prelocs
,
647 Output_section
* output_section
,
648 bool needs_special_offset_handling
,
649 size_t local_symbol_count
,
650 const unsigned char* plocal_symbols
);
652 // Map input .toc section to output .got section.
654 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
656 if (size
== 64 && strcmp(name
, ".toc") == 0)
664 // Provide linker defined save/restore functions.
666 define_save_restore_funcs(Layout
*, Symbol_table
*);
668 // No stubs unless a final link.
671 { return !parameters
->options().relocatable(); }
674 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
677 do_plt_fde_location(const Output_data
*, unsigned char*,
678 uint64_t*, off_t
*) const;
680 // Stash info about branches, for stub generation.
682 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
683 unsigned int data_shndx
, Address r_offset
,
684 unsigned int r_type
, unsigned int r_sym
, Address addend
)
686 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
687 this->branch_info_
.push_back(info
);
688 if (r_type
== elfcpp::R_POWERPC_REL14
689 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
690 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
691 ppc_object
->set_has_14bit_branch(data_shndx
);
694 // Return whether the last branch is a plt call, and if so, mark the
695 // branch as having an R_PPC64_TOCSAVE.
697 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
698 unsigned int data_shndx
, Address r_offset
, Symbol_table
* symtab
)
701 && !this->branch_info_
.empty()
702 && this->branch_info_
.back().mark_pltcall(ppc_object
, data_shndx
,
703 r_offset
, this, symtab
));
706 // Say the given location, that of a nop in a function prologue with
707 // an R_PPC64_TOCSAVE reloc, will be used to save r2.
708 // R_PPC64_TOCSAVE relocs on nops following calls point at this nop.
710 add_tocsave(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
711 unsigned int shndx
, Address offset
)
714 loc
.object
= ppc_object
;
717 this->tocsave_loc_
.insert(loc
);
724 return this->tocsave_loc_
;
728 do_define_standard_symbols(Symbol_table
*, Layout
*);
730 // Finalize the sections.
732 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
734 // Return the value to use for a dynamic which requires special
737 do_dynsym_value(const Symbol
*) const;
739 // Return the PLT address to use for a local symbol.
741 do_plt_address_for_local(const Relobj
*, unsigned int) const;
743 // Return the PLT address to use for a global symbol.
745 do_plt_address_for_global(const Symbol
*) const;
747 // Return the offset to use for the GOT_INDX'th got entry which is
748 // for a local tls symbol specified by OBJECT, SYMNDX.
750 do_tls_offset_for_local(const Relobj
* object
,
752 unsigned int got_indx
) const;
754 // Return the offset to use for the GOT_INDX'th got entry which is
755 // for global tls symbol GSYM.
757 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
760 do_function_location(Symbol_location
*) const;
763 do_can_check_for_function_pointers() const
766 // Adjust -fsplit-stack code which calls non-split-stack code.
768 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
769 section_offset_type fnoffset
, section_size_type fnsize
,
770 const unsigned char* prelocs
, size_t reloc_count
,
771 unsigned char* view
, section_size_type view_size
,
772 std::string
* from
, std::string
* to
) const;
774 // Relocate a section.
776 relocate_section(const Relocate_info
<size
, big_endian
>*,
777 unsigned int sh_type
,
778 const unsigned char* prelocs
,
780 Output_section
* output_section
,
781 bool needs_special_offset_handling
,
783 Address view_address
,
784 section_size_type view_size
,
785 const Reloc_symbol_changes
*);
787 // Scan the relocs during a relocatable link.
789 scan_relocatable_relocs(Symbol_table
* symtab
,
791 Sized_relobj_file
<size
, big_endian
>* object
,
792 unsigned int data_shndx
,
793 unsigned int sh_type
,
794 const unsigned char* prelocs
,
796 Output_section
* output_section
,
797 bool needs_special_offset_handling
,
798 size_t local_symbol_count
,
799 const unsigned char* plocal_symbols
,
800 Relocatable_relocs
*);
802 // Scan the relocs for --emit-relocs.
804 emit_relocs_scan(Symbol_table
* symtab
,
806 Sized_relobj_file
<size
, big_endian
>* object
,
807 unsigned int data_shndx
,
808 unsigned int sh_type
,
809 const unsigned char* prelocs
,
811 Output_section
* output_section
,
812 bool needs_special_offset_handling
,
813 size_t local_symbol_count
,
814 const unsigned char* plocal_syms
,
815 Relocatable_relocs
* rr
);
817 // Emit relocations for a section.
819 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
820 unsigned int sh_type
,
821 const unsigned char* prelocs
,
823 Output_section
* output_section
,
824 typename
elfcpp::Elf_types
<size
>::Elf_Off
825 offset_in_output_section
,
827 Address view_address
,
829 unsigned char* reloc_view
,
830 section_size_type reloc_view_size
);
832 // Return whether SYM is defined by the ABI.
834 do_is_defined_by_abi(const Symbol
* sym
) const
836 return strcmp(sym
->name(), "__tls_get_addr") == 0;
839 // Return the size of the GOT section.
843 gold_assert(this->got_
!= NULL
);
844 return this->got_
->data_size();
847 // Get the PLT section.
848 const Output_data_plt_powerpc
<size
, big_endian
>*
851 gold_assert(this->plt_
!= NULL
);
855 // Get the IPLT section.
856 const Output_data_plt_powerpc
<size
, big_endian
>*
859 gold_assert(this->iplt_
!= NULL
);
863 // Get the LPLT section.
864 const Output_data_plt_powerpc
<size
, big_endian
>*
870 // Return the plt offset and section for the given global sym.
872 plt_off(const Symbol
* gsym
,
873 const Output_data_plt_powerpc
<size
, big_endian
>** sec
) const
875 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
876 && gsym
->can_use_relative_reloc(false))
877 *sec
= this->iplt_section();
879 *sec
= this->plt_section();
880 return gsym
->plt_offset();
883 // Return the plt offset and section for the given local sym.
885 plt_off(const Sized_relobj_file
<size
, big_endian
>* relobj
,
886 unsigned int local_sym_index
,
887 const Output_data_plt_powerpc
<size
, big_endian
>** sec
) const
889 const Symbol_value
<size
>* lsym
= relobj
->local_symbol(local_sym_index
);
890 if (lsym
->is_ifunc_symbol())
891 *sec
= this->iplt_section();
893 *sec
= this->lplt_section();
894 return relobj
->local_plt_offset(local_sym_index
);
897 // Get the .glink section.
898 const Output_data_glink
<size
, big_endian
>*
899 glink_section() const
901 gold_assert(this->glink_
!= NULL
);
905 Output_data_glink
<size
, big_endian
>*
908 gold_assert(this->glink_
!= NULL
);
912 bool has_glink() const
913 { return this->glink_
!= NULL
; }
915 // Get the GOT section.
916 const Output_data_got_powerpc
<size
, big_endian
>*
919 gold_assert(this->got_
!= NULL
);
923 // Get the GOT section, creating it if necessary.
924 Output_data_got_powerpc
<size
, big_endian
>*
925 got_section(Symbol_table
*, Layout
*);
928 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
929 const elfcpp::Ehdr
<size
, big_endian
>&);
931 // Return the number of entries in the GOT.
933 got_entry_count() const
935 if (this->got_
== NULL
)
937 return this->got_size() / (size
/ 8);
940 // Return the number of entries in the PLT.
942 plt_entry_count() const;
944 // Return the offset of the first non-reserved PLT entry.
946 first_plt_entry_offset() const
950 if (this->abiversion() >= 2)
955 // Return the size of each PLT entry.
957 plt_entry_size() const
961 if (this->abiversion() >= 2)
966 Output_data_save_res
<size
, big_endian
>*
967 savres_section() const
969 return this->savres_section_
;
972 // Add any special sections for this symbol to the gc work list.
973 // For powerpc64, this adds the code section of a function
976 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
978 // Handle target specific gc actions when adding a gc reference from
979 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
980 // and DST_OFF. For powerpc64, this adds a referenc to the code
981 // section of a function descriptor.
983 do_gc_add_reference(Symbol_table
* symtab
,
985 unsigned int src_shndx
,
987 unsigned int dst_shndx
,
988 Address dst_off
) const;
990 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
993 { return this->stub_tables_
; }
995 const Output_data_brlt_powerpc
<size
, big_endian
>*
997 { return this->brlt_section_
; }
1000 add_branch_lookup_table(Address to
)
1002 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
1003 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
1007 find_branch_lookup_table(Address to
)
1009 typename
Branch_lookup_table::const_iterator p
1010 = this->branch_lookup_table_
.find(to
);
1011 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
1015 write_branch_lookup_table(unsigned char *oview
)
1017 for (typename
Branch_lookup_table::const_iterator p
1018 = this->branch_lookup_table_
.begin();
1019 p
!= this->branch_lookup_table_
.end();
1022 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
1026 // Wrapper used after relax to define a local symbol in output data,
1027 // from the end if value < 0.
1029 define_local(Symbol_table
* symtab
, const char* name
,
1030 Output_data
* od
, Address value
, unsigned int symsize
)
1033 = symtab
->define_in_output_data(name
, NULL
, Symbol_table::PREDEFINED
,
1034 od
, value
, symsize
, elfcpp::STT_NOTYPE
,
1035 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
, 0,
1036 static_cast<Signed_address
>(value
) < 0,
1038 // We are creating this symbol late, so need to fix up things
1039 // done early in Layout::finalize.
1040 sym
->set_dynsym_index(-1U);
1044 plt_thread_safe() const
1045 { return this->plt_thread_safe_
; }
1048 plt_localentry0() const
1049 { return this->plt_localentry0_
; }
1052 set_has_localentry0()
1054 this->has_localentry0_
= true;
1058 is_elfv2_localentry0(const Symbol
* gsym
) const
1061 && this->abiversion() >= 2
1062 && this->plt_localentry0()
1063 && gsym
->type() == elfcpp::STT_FUNC
1064 && gsym
->is_defined()
1065 && gsym
->nonvis() >> 3 == 0
1066 && !gsym
->non_zero_localentry());
1070 is_elfv2_localentry0(const Sized_relobj_file
<size
, big_endian
>* object
,
1071 unsigned int r_sym
) const
1073 const Powerpc_relobj
<size
, big_endian
>* ppc_object
1074 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
1077 && this->abiversion() >= 2
1078 && this->plt_localentry0()
1079 && ppc_object
->st_other(r_sym
) >> 5 == 0)
1081 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
1083 if (!psymval
->is_ifunc_symbol()
1084 && psymval
->input_shndx(&is_ordinary
) != elfcpp::SHN_UNDEF
1091 // Remember any symbols seen with non-zero localentry, even those
1092 // not providing a definition
1094 resolve(Symbol
* to
, const elfcpp::Sym
<size
, big_endian
>& sym
, Object
*,
1099 unsigned char st_other
= sym
.get_st_other();
1100 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1101 to
->set_non_zero_localentry();
1103 // We haven't resolved anything, continue normal processing.
1109 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
1112 set_abiversion(int ver
)
1114 elfcpp::Elf_Word flags
= this->processor_specific_flags();
1115 flags
&= ~elfcpp::EF_PPC64_ABI
;
1116 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
1117 this->set_processor_specific_flags(flags
);
1121 tls_get_addr_opt() const
1122 { return this->tls_get_addr_opt_
; }
1125 tls_get_addr() const
1126 { return this->tls_get_addr_
; }
1128 // If optimizing __tls_get_addr calls, whether this is the
1129 // "__tls_get_addr" symbol.
1131 is_tls_get_addr_opt(const Symbol
* gsym
) const
1133 return this->tls_get_addr_opt_
&& (gsym
== this->tls_get_addr_
1134 || gsym
== this->tls_get_addr_opt_
);
1138 replace_tls_get_addr(const Symbol
* gsym
) const
1139 { return this->tls_get_addr_opt_
&& gsym
== this->tls_get_addr_
; }
1142 set_has_tls_get_addr_opt()
1143 { this->has_tls_get_addr_opt_
= true; }
1145 // Offset to toc save stack slot
1148 { return this->abiversion() < 2 ? 40 : 24; }
1150 // Offset to linker save stack slot. ELFv2 doesn't have a linker word,
1151 // so use the CR save slot. Used only by __tls_get_addr call stub,
1152 // relying on __tls_get_addr not saving CR itself.
1155 { return this->abiversion() < 2 ? 32 : 8; }
1171 : tls_get_addr_state_(NOT_EXPECTED
),
1172 relinfo_(NULL
), relnum_(0), r_offset_(0)
1177 if (this->tls_get_addr_state_
!= NOT_EXPECTED
)
1184 if (this->relinfo_
!= NULL
)
1185 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
1186 _("missing expected __tls_get_addr call"));
1190 expect_tls_get_addr_call(
1191 const Relocate_info
<size
, big_endian
>* relinfo
,
1195 this->tls_get_addr_state_
= EXPECTED
;
1196 this->relinfo_
= relinfo
;
1197 this->relnum_
= relnum
;
1198 this->r_offset_
= r_offset
;
1202 expect_tls_get_addr_call()
1203 { this->tls_get_addr_state_
= EXPECTED
; }
1206 skip_next_tls_get_addr_call()
1207 {this->tls_get_addr_state_
= SKIP
; }
1210 maybe_skip_tls_get_addr_call(Target_powerpc
<size
, big_endian
>* target
,
1211 unsigned int r_type
, const Symbol
* gsym
)
1213 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
1214 || r_type
== elfcpp::R_PPC_PLTREL24
)
1216 && (gsym
== target
->tls_get_addr()
1217 || gsym
== target
->tls_get_addr_opt()));
1218 Tls_get_addr last_tls
= this->tls_get_addr_state_
;
1219 this->tls_get_addr_state_
= NOT_EXPECTED
;
1220 if (is_tls_call
&& last_tls
!= EXPECTED
)
1222 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
1231 // What we're up to regarding calls to __tls_get_addr.
1232 // On powerpc, the branch and link insn making a call to
1233 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1234 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1235 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1236 // The marker relocation always comes first, and has the same
1237 // symbol as the reloc on the insn setting up the __tls_get_addr
1238 // argument. This ties the arg setup insn with the call insn,
1239 // allowing ld to safely optimize away the call. We check that
1240 // every call to __tls_get_addr has a marker relocation, and that
1241 // every marker relocation is on a call to __tls_get_addr.
1242 Tls_get_addr tls_get_addr_state_
;
1243 // Info about the last reloc for error message.
1244 const Relocate_info
<size
, big_endian
>* relinfo_
;
1249 // The class which scans relocations.
1250 class Scan
: protected Track_tls
1253 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1256 : Track_tls(), issued_non_pic_error_(false)
1260 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
1263 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1264 Sized_relobj_file
<size
, big_endian
>* object
,
1265 unsigned int data_shndx
,
1266 Output_section
* output_section
,
1267 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1268 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1272 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1273 Sized_relobj_file
<size
, big_endian
>* object
,
1274 unsigned int data_shndx
,
1275 Output_section
* output_section
,
1276 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1280 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1282 Sized_relobj_file
<size
, big_endian
>* relobj
,
1285 const elfcpp::Rela
<size
, big_endian
>& ,
1286 unsigned int r_type
,
1287 const elfcpp::Sym
<size
, big_endian
>&)
1289 // PowerPC64 .opd is not folded, so any identical function text
1290 // may be folded and we'll still keep function addresses distinct.
1291 // That means no reloc is of concern here.
1294 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1295 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1296 if (ppcobj
->abiversion() == 1)
1299 // For 32-bit and ELFv2, conservatively assume anything but calls to
1300 // function code might be taking the address of the function.
1301 return !is_branch_reloc(r_type
);
1305 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1307 Sized_relobj_file
<size
, big_endian
>* relobj
,
1310 const elfcpp::Rela
<size
, big_endian
>& ,
1311 unsigned int r_type
,
1317 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1318 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1319 if (ppcobj
->abiversion() == 1)
1322 return !is_branch_reloc(r_type
);
1326 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1327 Sized_relobj_file
<size
, big_endian
>* object
,
1328 unsigned int r_type
, bool report_err
);
1332 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1333 unsigned int r_type
);
1336 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1337 unsigned int r_type
, Symbol
*);
1340 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1341 Target_powerpc
* target
);
1344 check_non_pic(Relobj
*, unsigned int r_type
);
1346 // Whether we have issued an error about a non-PIC compilation.
1347 bool issued_non_pic_error_
;
1351 symval_for_branch(const Symbol_table
* symtab
,
1352 const Sized_symbol
<size
>* gsym
,
1353 Powerpc_relobj
<size
, big_endian
>* object
,
1354 Address
*value
, unsigned int *dest_shndx
);
1356 // The class which implements relocation.
1357 class Relocate
: protected Track_tls
1360 // Use 'at' branch hints when true, 'y' when false.
1361 // FIXME maybe: set this with an option.
1362 static const bool is_isa_v2
= true;
1368 // Do a relocation. Return false if the caller should not issue
1369 // any warnings about this relocation.
1371 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1372 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1373 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1374 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1378 class Relocate_comdat_behavior
1381 // Decide what the linker should do for relocations that refer to
1382 // discarded comdat sections.
1383 inline Comdat_behavior
1384 get(const char* name
)
1386 gold::Default_comdat_behavior default_behavior
;
1387 Comdat_behavior ret
= default_behavior
.get(name
);
1388 if (ret
== CB_ERROR
)
1391 && (strcmp(name
, ".fixup") == 0
1392 || strcmp(name
, ".got2") == 0))
1395 && (strcmp(name
, ".opd") == 0
1396 || strcmp(name
, ".toc") == 0
1397 || strcmp(name
, ".toc1") == 0))
1404 // Optimize the TLS relocation type based on what we know about the
1405 // symbol. IS_FINAL is true if the final address of this symbol is
1406 // known at link time.
1408 tls::Tls_optimization
1409 optimize_tls_gd(bool is_final
)
1411 // If we are generating a shared library, then we can't do anything
1413 if (parameters
->options().shared()
1414 || !parameters
->options().tls_optimize())
1415 return tls::TLSOPT_NONE
;
1418 return tls::TLSOPT_TO_IE
;
1419 return tls::TLSOPT_TO_LE
;
1422 tls::Tls_optimization
1425 if (parameters
->options().shared()
1426 || !parameters
->options().tls_optimize())
1427 return tls::TLSOPT_NONE
;
1429 return tls::TLSOPT_TO_LE
;
1432 tls::Tls_optimization
1433 optimize_tls_ie(bool is_final
)
1436 || parameters
->options().shared()
1437 || !parameters
->options().tls_optimize())
1438 return tls::TLSOPT_NONE
;
1440 return tls::TLSOPT_TO_LE
;
1445 make_glink_section(Layout
*);
1447 // Create the PLT section.
1449 make_plt_section(Symbol_table
*, Layout
*);
1452 make_iplt_section(Symbol_table
*, Layout
*);
1455 make_lplt_section(Layout
*);
1458 make_brlt_section(Layout
*);
1460 // Create a PLT entry for a global symbol.
1462 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1464 // Create a PLT entry for a local IFUNC symbol.
1466 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1467 Sized_relobj_file
<size
, big_endian
>*,
1470 // Create a PLT entry for a local non-IFUNC symbol.
1472 make_local_plt_entry(Layout
*,
1473 Sized_relobj_file
<size
, big_endian
>*,
1477 // Create a GOT entry for local dynamic __tls_get_addr.
1479 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1480 Sized_relobj_file
<size
, big_endian
>* object
);
1483 tlsld_got_offset() const
1485 return this->tlsld_got_offset_
;
1488 // Get the dynamic reloc section, creating it if necessary.
1490 rela_dyn_section(Layout
*);
1492 // Similarly, but for ifunc symbols get the one for ifunc.
1494 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1496 // Copy a relocation against a global symbol.
1498 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1499 Sized_relobj_file
<size
, big_endian
>* object
,
1500 unsigned int shndx
, Output_section
* output_section
,
1501 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1503 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1504 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1505 symtab
->get_sized_symbol
<size
>(sym
),
1506 object
, shndx
, output_section
,
1507 r_type
, reloc
.get_r_offset(),
1508 reloc
.get_r_addend(),
1509 this->rela_dyn_section(layout
));
1512 // Look over all the input sections, deciding where to place stubs.
1514 group_sections(Layout
*, const Task
*, bool);
1516 // Sort output sections by address.
1517 struct Sort_sections
1520 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1521 { return sec1
->address() < sec2
->address(); }
1527 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1528 unsigned int data_shndx
,
1530 unsigned int r_type
,
1533 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1534 r_type_(r_type
), tocsave_ (0), r_sym_(r_sym
), addend_(addend
)
1540 // Return whether this branch is going via a plt call stub, and if
1541 // so, mark it as having an R_PPC64_TOCSAVE.
1543 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1544 unsigned int shndx
, Address offset
,
1545 Target_powerpc
* target
, Symbol_table
* symtab
);
1547 // If this branch needs a plt call stub, or a long branch stub, make one.
1549 make_stub(Stub_table
<size
, big_endian
>*,
1550 Stub_table
<size
, big_endian
>*,
1551 Symbol_table
*) const;
1554 // The branch location..
1555 Powerpc_relobj
<size
, big_endian
>* object_
;
1556 unsigned int shndx_
;
1558 // ..and the branch type and destination.
1559 unsigned int r_type_
: 31;
1560 unsigned int tocsave_
: 1;
1561 unsigned int r_sym_
;
1565 // Information about this specific target which we pass to the
1566 // general Target structure.
1567 static Target::Target_info powerpc_info
;
1569 // The types of GOT entries needed for this platform.
1570 // These values are exposed to the ABI in an incremental link.
1571 // Do not renumber existing values without changing the version
1572 // number of the .gnu_incremental_inputs section.
1576 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1577 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1578 GOT_TYPE_TPREL
// entry for @got@tprel
1582 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1583 // The PLT section. This is a container for a table of addresses,
1584 // and their relocations. Each address in the PLT has a dynamic
1585 // relocation (R_*_JMP_SLOT) and each address will have a
1586 // corresponding entry in .glink for lazy resolution of the PLT.
1587 // ppc32 initialises the PLT to point at the .glink entry, while
1588 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1589 // linker adds a stub that loads the PLT entry into ctr then
1590 // branches to ctr. There may be more than one stub for each PLT
1591 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1592 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1593 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1594 // The IPLT section. Like plt_, this is a container for a table of
1595 // addresses and their relocations, specifically for STT_GNU_IFUNC
1596 // functions that resolve locally (STT_GNU_IFUNC functions that
1597 // don't resolve locally go in PLT). Unlike plt_, these have no
1598 // entry in .glink for lazy resolution, and the relocation section
1599 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1600 // the relocation section may contain relocations against
1601 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1602 // relocation section will appear at the end of other dynamic
1603 // relocations, so that ld.so applies these relocations after other
1604 // dynamic relocations. In a static executable, the relocation
1605 // section is emitted and marked with __rela_iplt_start and
1606 // __rela_iplt_end symbols.
1607 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1608 // A PLT style section for local, non-ifunc symbols
1609 Output_data_plt_powerpc
<size
, big_endian
>* lplt_
;
1610 // Section holding long branch destinations.
1611 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1612 // The .glink section.
1613 Output_data_glink
<size
, big_endian
>* glink_
;
1614 // The dynamic reloc section.
1615 Reloc_section
* rela_dyn_
;
1616 // Relocs saved to avoid a COPY reloc.
1617 Powerpc_copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1618 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1619 unsigned int tlsld_got_offset_
;
1621 Stub_tables stub_tables_
;
1622 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1623 Branch_lookup_table branch_lookup_table_
;
1625 typedef std::vector
<Branch_info
> Branches
;
1626 Branches branch_info_
;
1627 Tocsave_loc tocsave_loc_
;
1629 bool plt_thread_safe_
;
1630 bool plt_localentry0_
;
1631 bool plt_localentry0_init_
;
1632 bool has_localentry0_
;
1633 bool has_tls_get_addr_opt_
;
1636 int relax_fail_count_
;
1637 int32_t stub_group_size_
;
1639 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1641 // The "__tls_get_addr" symbol, if present
1642 Symbol
* tls_get_addr_
;
1643 // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol.
1644 Symbol
* tls_get_addr_opt_
;
1648 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1651 true, // is_big_endian
1652 elfcpp::EM_PPC
, // machine_code
1653 false, // has_make_symbol
1654 false, // has_resolve
1655 false, // has_code_fill
1656 true, // is_default_stack_executable
1657 false, // can_icf_inline_merge_sections
1659 "/usr/lib/ld.so.1", // dynamic_linker
1660 0x10000000, // default_text_segment_address
1661 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1662 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1663 false, // isolate_execinstr
1665 elfcpp::SHN_UNDEF
, // small_common_shndx
1666 elfcpp::SHN_UNDEF
, // large_common_shndx
1667 0, // small_common_section_flags
1668 0, // large_common_section_flags
1669 NULL
, // attributes_section
1670 NULL
, // attributes_vendor
1671 "_start", // entry_symbol_name
1672 32, // hash_entry_size
1673 elfcpp::SHT_PROGBITS
, // unwind_section_type
1677 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1680 false, // is_big_endian
1681 elfcpp::EM_PPC
, // machine_code
1682 false, // has_make_symbol
1683 false, // has_resolve
1684 false, // has_code_fill
1685 true, // is_default_stack_executable
1686 false, // can_icf_inline_merge_sections
1688 "/usr/lib/ld.so.1", // dynamic_linker
1689 0x10000000, // default_text_segment_address
1690 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1691 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1692 false, // isolate_execinstr
1694 elfcpp::SHN_UNDEF
, // small_common_shndx
1695 elfcpp::SHN_UNDEF
, // large_common_shndx
1696 0, // small_common_section_flags
1697 0, // large_common_section_flags
1698 NULL
, // attributes_section
1699 NULL
, // attributes_vendor
1700 "_start", // entry_symbol_name
1701 32, // hash_entry_size
1702 elfcpp::SHT_PROGBITS
, // unwind_section_type
1706 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1709 true, // is_big_endian
1710 elfcpp::EM_PPC64
, // machine_code
1711 false, // has_make_symbol
1712 true, // has_resolve
1713 false, // has_code_fill
1714 false, // is_default_stack_executable
1715 false, // can_icf_inline_merge_sections
1717 "/usr/lib/ld.so.1", // dynamic_linker
1718 0x10000000, // default_text_segment_address
1719 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1720 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1721 false, // isolate_execinstr
1723 elfcpp::SHN_UNDEF
, // small_common_shndx
1724 elfcpp::SHN_UNDEF
, // large_common_shndx
1725 0, // small_common_section_flags
1726 0, // large_common_section_flags
1727 NULL
, // attributes_section
1728 NULL
, // attributes_vendor
1729 "_start", // entry_symbol_name
1730 32, // hash_entry_size
1731 elfcpp::SHT_PROGBITS
, // unwind_section_type
1735 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1738 false, // is_big_endian
1739 elfcpp::EM_PPC64
, // machine_code
1740 false, // has_make_symbol
1741 true, // has_resolve
1742 false, // has_code_fill
1743 false, // is_default_stack_executable
1744 false, // can_icf_inline_merge_sections
1746 "/usr/lib/ld.so.1", // dynamic_linker
1747 0x10000000, // default_text_segment_address
1748 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1749 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1750 false, // isolate_execinstr
1752 elfcpp::SHN_UNDEF
, // small_common_shndx
1753 elfcpp::SHN_UNDEF
, // large_common_shndx
1754 0, // small_common_section_flags
1755 0, // large_common_section_flags
1756 NULL
, // attributes_section
1757 NULL
, // attributes_vendor
1758 "_start", // entry_symbol_name
1759 32, // hash_entry_size
1760 elfcpp::SHT_PROGBITS
, // unwind_section_type
1764 is_branch_reloc(unsigned int r_type
)
1766 return (r_type
== elfcpp::R_POWERPC_REL24
1767 || r_type
== elfcpp::R_PPC_PLTREL24
1768 || r_type
== elfcpp::R_PPC_LOCAL24PC
1769 || r_type
== elfcpp::R_POWERPC_REL14
1770 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1771 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1772 || r_type
== elfcpp::R_POWERPC_ADDR24
1773 || r_type
== elfcpp::R_POWERPC_ADDR14
1774 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1775 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1778 // Reloc resolves to plt entry.
1781 is_plt16_reloc(unsigned int r_type
)
1783 return (r_type
== elfcpp::R_POWERPC_PLT16_LO
1784 || r_type
== elfcpp::R_POWERPC_PLT16_HI
1785 || r_type
== elfcpp::R_POWERPC_PLT16_HA
1786 || (size
== 64 && r_type
== elfcpp::R_PPC64_PLT16_LO_DS
));
1789 // If INSN is an opcode that may be used with an @tls operand, return
1790 // the transformed insn for TLS optimisation, otherwise return 0. If
1791 // REG is non-zero only match an insn with RB or RA equal to REG.
1793 at_tls_transform(uint32_t insn
, unsigned int reg
)
1795 if ((insn
& (0x3f << 26)) != 31 << 26)
1799 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1800 rtra
= insn
& ((1 << 26) - (1 << 16));
1801 else if (((insn
>> 16) & 0x1f) == reg
)
1802 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1806 if ((insn
& (0x3ff << 1)) == 266 << 1)
1809 else if ((insn
& (0x1f << 1)) == 23 << 1
1810 && ((insn
& (0x1f << 6)) < 14 << 6
1811 || ((insn
& (0x1f << 6)) >= 16 << 6
1812 && (insn
& (0x1f << 6)) < 24 << 6)))
1813 // load and store indexed -> dform
1814 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1815 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1816 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1817 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1818 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1820 insn
= (58 << 26) | 2;
1828 template<int size
, bool big_endian
>
1829 class Powerpc_relocate_functions
1849 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1850 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1851 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1853 template<int valsize
>
1855 has_overflow_signed(Address value
)
1857 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1858 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1859 limit
<<= ((valsize
- 1) >> 1);
1860 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1861 return value
+ limit
> (limit
<< 1) - 1;
1864 template<int valsize
>
1866 has_overflow_unsigned(Address value
)
1868 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1869 limit
<<= ((valsize
- 1) >> 1);
1870 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1871 return value
> (limit
<< 1) - 1;
1874 template<int valsize
>
1876 has_overflow_bitfield(Address value
)
1878 return (has_overflow_unsigned
<valsize
>(value
)
1879 && has_overflow_signed
<valsize
>(value
));
1882 template<int valsize
>
1883 static inline Status
1884 overflowed(Address value
, Overflow_check overflow
)
1886 if (overflow
== CHECK_SIGNED
)
1888 if (has_overflow_signed
<valsize
>(value
))
1889 return STATUS_OVERFLOW
;
1891 else if (overflow
== CHECK_UNSIGNED
)
1893 if (has_overflow_unsigned
<valsize
>(value
))
1894 return STATUS_OVERFLOW
;
1896 else if (overflow
== CHECK_BITFIELD
)
1898 if (has_overflow_bitfield
<valsize
>(value
))
1899 return STATUS_OVERFLOW
;
1904 // Do a simple RELA relocation
1905 template<int fieldsize
, int valsize
>
1906 static inline Status
1907 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1909 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1910 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1911 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1912 return overflowed
<valsize
>(value
, overflow
);
1915 template<int fieldsize
, int valsize
>
1916 static inline Status
1917 rela(unsigned char* view
,
1918 unsigned int right_shift
,
1919 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1921 Overflow_check overflow
)
1923 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1924 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1925 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1926 Valtype reloc
= value
>> right_shift
;
1929 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1930 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1933 // Do a simple RELA relocation, unaligned.
1934 template<int fieldsize
, int valsize
>
1935 static inline Status
1936 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1938 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1939 return overflowed
<valsize
>(value
, overflow
);
1942 template<int fieldsize
, int valsize
>
1943 static inline Status
1944 rela_ua(unsigned char* view
,
1945 unsigned int right_shift
,
1946 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1948 Overflow_check overflow
)
1950 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1952 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1953 Valtype reloc
= value
>> right_shift
;
1956 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1957 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1961 // R_PPC64_ADDR64: (Symbol + Addend)
1963 addr64(unsigned char* view
, Address value
)
1964 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1966 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1968 addr64_u(unsigned char* view
, Address value
)
1969 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1971 // R_POWERPC_ADDR32: (Symbol + Addend)
1972 static inline Status
1973 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1974 { return This::template rela
<32,32>(view
, value
, overflow
); }
1976 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1977 static inline Status
1978 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1979 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1981 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1982 static inline Status
1983 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1985 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1987 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1988 stat
= STATUS_OVERFLOW
;
1992 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1993 static inline Status
1994 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1995 { return This::template rela
<16,16>(view
, value
, overflow
); }
1997 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1998 static inline Status
1999 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
2000 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
2002 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
2003 static inline Status
2004 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
2006 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
2007 if ((value
& 3) != 0)
2008 stat
= STATUS_OVERFLOW
;
2012 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
2013 static inline Status
2014 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
2016 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
2017 if ((value
& 15) != 0)
2018 stat
= STATUS_OVERFLOW
;
2022 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
2024 addr16_hi(unsigned char* view
, Address value
)
2025 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
2027 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
2029 addr16_ha(unsigned char* view
, Address value
)
2030 { This::addr16_hi(view
, value
+ 0x8000); }
2032 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
2034 addr16_hi2(unsigned char* view
, Address value
)
2035 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
2037 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
2039 addr16_ha2(unsigned char* view
, Address value
)
2040 { This::addr16_hi2(view
, value
+ 0x8000); }
2042 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
2044 addr16_hi3(unsigned char* view
, Address value
)
2045 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
2047 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
2049 addr16_ha3(unsigned char* view
, Address value
)
2050 { This::addr16_hi3(view
, value
+ 0x8000); }
2052 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
2053 static inline Status
2054 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
2056 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
2057 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
2058 stat
= STATUS_OVERFLOW
;
2062 // R_POWERPC_REL16DX_HA
2063 static inline Status
2064 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
2066 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
2067 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
2068 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
2070 value
= static_cast<SignedAddress
>(value
) >> 16;
2071 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
2072 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
2073 return overflowed
<16>(value
, overflow
);
2077 // Set ABI version for input and output.
2079 template<int size
, bool big_endian
>
2081 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
2083 this->e_flags_
|= ver
;
2084 if (this->abiversion() != 0)
2086 Target_powerpc
<size
, big_endian
>* target
=
2087 static_cast<Target_powerpc
<size
, big_endian
>*>(
2088 parameters
->sized_target
<size
, big_endian
>());
2089 if (target
->abiversion() == 0)
2090 target
->set_abiversion(this->abiversion());
2091 else if (target
->abiversion() != this->abiversion())
2092 gold_error(_("%s: ABI version %d is not compatible "
2093 "with ABI version %d output"),
2094 this->name().c_str(),
2095 this->abiversion(), target
->abiversion());
2100 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
2101 // relocatable object, if such sections exists.
2103 template<int size
, bool big_endian
>
2105 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
2106 Read_symbols_data
* sd
)
2108 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2109 const unsigned char* namesu
= sd
->section_names
->data();
2110 const char* names
= reinterpret_cast<const char*>(namesu
);
2111 section_size_type names_size
= sd
->section_names_size
;
2112 const unsigned char* s
;
2114 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
2115 size
== 32 ? ".got2" : ".opd",
2116 names
, names_size
, NULL
);
2119 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2120 this->special_
= ndx
;
2123 if (this->abiversion() == 0)
2124 this->set_abiversion(1);
2125 else if (this->abiversion() > 1)
2126 gold_error(_("%s: .opd invalid in abiv%d"),
2127 this->name().c_str(), this->abiversion());
2132 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
2133 names
, names_size
, NULL
);
2136 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2137 this->relatoc_
= ndx
;
2138 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2139 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
2142 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
2145 // Examine .rela.opd to build info about function entry points.
2147 template<int size
, bool big_endian
>
2149 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
2151 const unsigned char* prelocs
,
2152 const unsigned char* plocal_syms
)
2156 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
2157 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
2158 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2159 Address expected_off
= 0;
2160 bool regular
= true;
2161 unsigned int opd_ent_size
= 0;
2163 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2165 Reltype
reloc(prelocs
);
2166 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
2167 = reloc
.get_r_info();
2168 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2169 if (r_type
== elfcpp::R_PPC64_ADDR64
)
2171 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2172 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
2175 if (r_sym
< this->local_symbol_count())
2177 typename
elfcpp::Sym
<size
, big_endian
>
2178 lsym(plocal_syms
+ r_sym
* sym_size
);
2179 shndx
= lsym
.get_st_shndx();
2180 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2181 value
= lsym
.get_st_value();
2184 shndx
= this->symbol_section_and_value(r_sym
, &value
,
2186 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
2187 value
+ reloc
.get_r_addend());
2190 expected_off
= reloc
.get_r_offset();
2191 opd_ent_size
= expected_off
;
2193 else if (expected_off
!= reloc
.get_r_offset())
2195 expected_off
+= opd_ent_size
;
2197 else if (r_type
== elfcpp::R_PPC64_TOC
)
2199 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
2204 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2205 this->name().c_str(), r_type
);
2209 if (reloc_count
<= 2)
2210 opd_ent_size
= this->section_size(this->opd_shndx());
2211 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
2215 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2216 this->name().c_str());
2222 // Returns true if a code sequence loading the TOC entry at VALUE
2223 // relative to the TOC pointer can be converted into code calculating
2224 // a TOC pointer relative offset.
2225 // If so, the TOC pointer relative offset is stored to VALUE.
2227 template<int size
, bool big_endian
>
2229 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
2230 Target_powerpc
<size
, big_endian
>* target
,
2236 // With -mcmodel=medium code it is quite possible to have
2237 // toc-relative relocs referring to objects outside the TOC.
2238 // Don't try to look at a non-existent TOC.
2239 if (this->toc_shndx() == 0)
2242 // Convert VALUE back to an address by adding got_base (see below),
2243 // then to an offset in the TOC by subtracting the TOC output
2244 // section address and the TOC output offset. Since this TOC output
2245 // section and the got output section are one and the same, we can
2246 // omit adding and subtracting the output section address.
2247 Address off
= (*value
+ this->toc_base_offset()
2248 - this->output_section_offset(this->toc_shndx()));
2249 // Is this offset in the TOC? -mcmodel=medium code may be using
2250 // TOC relative access to variables outside the TOC. Those of
2251 // course can't be optimized. We also don't try to optimize code
2252 // that is using a different object's TOC.
2253 if (off
>= this->section_size(this->toc_shndx()))
2256 if (this->no_toc_opt(off
))
2259 section_size_type vlen
;
2260 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2261 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2263 Address got_base
= (target
->got_section()->output_section()->address()
2264 + this->toc_base_offset());
2266 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2273 // Perform the Sized_relobj_file method, then set up opd info from
2276 template<int size
, bool big_endian
>
2278 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2280 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2283 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2284 p
!= rd
->relocs
.end();
2287 if (p
->data_shndx
== this->opd_shndx())
2289 uint64_t opd_size
= this->section_size(this->opd_shndx());
2290 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2293 this->init_opd(opd_size
);
2294 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2295 rd
->local_symbols
->data());
2303 // Read the symbols then set up st_other vector.
2305 template<int size
, bool big_endian
>
2307 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2309 this->base_read_symbols(sd
);
2312 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2313 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2314 const unsigned int loccount
= this->do_local_symbol_count();
2317 this->st_other_
.resize(loccount
);
2318 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2319 off_t locsize
= loccount
* sym_size
;
2320 const unsigned int symtab_shndx
= this->symtab_shndx();
2321 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2322 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2323 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2324 locsize
, true, false);
2326 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2328 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2329 unsigned char st_other
= sym
.get_st_other();
2330 this->st_other_
[i
] = st_other
;
2331 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2333 if (this->abiversion() == 0)
2334 this->set_abiversion(2);
2335 else if (this->abiversion() < 2)
2336 gold_error(_("%s: local symbol %d has invalid st_other"
2337 " for ABI version 1"),
2338 this->name().c_str(), i
);
2345 template<int size
, bool big_endian
>
2347 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2349 this->e_flags_
|= ver
;
2350 if (this->abiversion() != 0)
2352 Target_powerpc
<size
, big_endian
>* target
=
2353 static_cast<Target_powerpc
<size
, big_endian
>*>(
2354 parameters
->sized_target
<size
, big_endian
>());
2355 if (target
->abiversion() == 0)
2356 target
->set_abiversion(this->abiversion());
2357 else if (target
->abiversion() != this->abiversion())
2358 gold_error(_("%s: ABI version %d is not compatible "
2359 "with ABI version %d output"),
2360 this->name().c_str(),
2361 this->abiversion(), target
->abiversion());
2366 // Call Sized_dynobj::base_read_symbols to read the symbols then
2367 // read .opd from a dynamic object, filling in opd_ent_ vector,
2369 template<int size
, bool big_endian
>
2371 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2373 this->base_read_symbols(sd
);
2376 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2377 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2378 const unsigned char* namesu
= sd
->section_names
->data();
2379 const char* names
= reinterpret_cast<const char*>(namesu
);
2380 const unsigned char* s
= NULL
;
2381 const unsigned char* opd
;
2382 section_size_type opd_size
;
2384 // Find and read .opd section.
2387 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2388 sd
->section_names_size
,
2393 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2394 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2395 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2397 if (this->abiversion() == 0)
2398 this->set_abiversion(1);
2399 else if (this->abiversion() > 1)
2400 gold_error(_("%s: .opd invalid in abiv%d"),
2401 this->name().c_str(), this->abiversion());
2403 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2404 this->opd_address_
= shdr
.get_sh_addr();
2405 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2406 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2412 // Build set of executable sections.
2413 // Using a set is probably overkill. There is likely to be only
2414 // a few executable sections, typically .init, .text and .fini,
2415 // and they are generally grouped together.
2416 typedef std::set
<Sec_info
> Exec_sections
;
2417 Exec_sections exec_sections
;
2419 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2421 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2422 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2423 && ((shdr
.get_sh_flags()
2424 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2425 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2426 && shdr
.get_sh_size() != 0)
2428 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2429 shdr
.get_sh_size(), i
));
2432 if (exec_sections
.empty())
2435 // Look over the OPD entries. This is complicated by the fact
2436 // that some binaries will use two-word entries while others
2437 // will use the standard three-word entries. In most cases
2438 // the third word (the environment pointer for languages like
2439 // Pascal) is unused and will be zero. If the third word is
2440 // used it should not be pointing into executable sections,
2442 this->init_opd(opd_size
);
2443 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2445 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2446 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2447 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2449 // Chances are that this is the third word of an OPD entry.
2451 typename
Exec_sections::const_iterator e
2452 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2453 if (e
!= exec_sections
.begin())
2456 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2458 // We have an address in an executable section.
2459 // VAL ought to be the function entry, set it up.
2460 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2461 // Skip second word of OPD entry, the TOC pointer.
2465 // If we didn't match any executable sections, we likely
2466 // have a non-zero third word in the OPD entry.
2471 // Relocate sections.
2473 template<int size
, bool big_endian
>
2475 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2476 const Symbol_table
* symtab
, const Layout
* layout
,
2477 const unsigned char* pshdrs
, Output_file
* of
,
2478 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2480 unsigned int start
= 1;
2482 && this->relatoc_
!= 0
2483 && !parameters
->options().relocatable())
2485 // Relocate .toc first.
2486 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2487 this->relatoc_
, this->relatoc_
);
2488 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2489 1, this->relatoc_
- 1);
2490 start
= this->relatoc_
+ 1;
2492 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2493 start
, this->shnum() - 1);
2495 if (!parameters
->options().output_is_position_independent())
2497 Target_powerpc
<size
, big_endian
>* target
2498 = static_cast<Target_powerpc
<size
, big_endian
>*>(
2499 parameters
->sized_target
<size
, big_endian
>());
2500 if (target
->lplt_section() && target
->lplt_section()->data_size() != 0)
2502 const section_size_type offset
= target
->lplt_section()->offset();
2503 const section_size_type oview_size
2504 = convert_to_section_size_type(target
->lplt_section()->data_size());
2505 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2507 bool modified
= false;
2508 unsigned int nsyms
= this->local_symbol_count();
2509 for (unsigned int i
= 0; i
< nsyms
; i
++)
2510 if (this->local_has_plt_offset(i
))
2512 Address value
= this->local_symbol_value(i
, 0);
2514 value
+= ppc64_local_entry_offset(i
);
2515 size_t off
= this->local_plt_offset(i
);
2516 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ off
, value
);
2520 of
->write_output_view(offset
, oview_size
, oview
);
2525 // Set up some symbols.
2527 template<int size
, bool big_endian
>
2529 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2530 Symbol_table
* symtab
,
2535 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2536 // undefined when scanning relocs (and thus requires
2537 // non-relative dynamic relocs). The proper value will be
2539 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2540 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2542 Target_powerpc
<size
, big_endian
>* target
=
2543 static_cast<Target_powerpc
<size
, big_endian
>*>(
2544 parameters
->sized_target
<size
, big_endian
>());
2545 Output_data_got_powerpc
<size
, big_endian
>* got
2546 = target
->got_section(symtab
, layout
);
2547 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2548 Symbol_table::PREDEFINED
,
2552 elfcpp::STV_HIDDEN
, 0,
2556 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2557 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2558 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2560 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2562 = layout
->add_output_section_data(".sdata", 0,
2564 | elfcpp::SHF_WRITE
,
2565 sdata
, ORDER_SMALL_DATA
, false);
2566 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2567 Symbol_table::PREDEFINED
,
2568 os
, 32768, 0, elfcpp::STT_OBJECT
,
2569 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2575 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2576 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2577 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2579 Target_powerpc
<size
, big_endian
>* target
=
2580 static_cast<Target_powerpc
<size
, big_endian
>*>(
2581 parameters
->sized_target
<size
, big_endian
>());
2582 Output_data_got_powerpc
<size
, big_endian
>* got
2583 = target
->got_section(symtab
, layout
);
2584 symtab
->define_in_output_data(".TOC.", NULL
,
2585 Symbol_table::PREDEFINED
,
2589 elfcpp::STV_HIDDEN
, 0,
2594 this->tls_get_addr_
= symtab
->lookup("__tls_get_addr");
2595 if (parameters
->options().tls_get_addr_optimize()
2596 && this->tls_get_addr_
!= NULL
2597 && this->tls_get_addr_
->in_reg())
2598 this->tls_get_addr_opt_
= symtab
->lookup("__tls_get_addr_opt");
2599 if (this->tls_get_addr_opt_
!= NULL
)
2601 if (this->tls_get_addr_
->is_undefined()
2602 || this->tls_get_addr_
->is_from_dynobj())
2604 // Make it seem as if references to __tls_get_addr are
2605 // really to __tls_get_addr_opt, so the latter symbol is
2606 // made dynamic, not the former.
2607 this->tls_get_addr_
->clear_in_reg();
2608 this->tls_get_addr_opt_
->set_in_reg();
2610 // We have a non-dynamic definition for __tls_get_addr.
2611 // Make __tls_get_addr_opt the same, if it does not already have
2612 // a non-dynamic definition.
2613 else if (this->tls_get_addr_opt_
->is_undefined()
2614 || this->tls_get_addr_opt_
->is_from_dynobj())
2616 Sized_symbol
<size
>* from
2617 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_
);
2618 Sized_symbol
<size
>* to
2619 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_opt_
);
2620 symtab
->clone
<size
>(to
, from
);
2625 // Set up PowerPC target specific relobj.
2627 template<int size
, bool big_endian
>
2629 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2630 const std::string
& name
,
2631 Input_file
* input_file
,
2632 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2634 int et
= ehdr
.get_e_type();
2635 // ET_EXEC files are valid input for --just-symbols/-R,
2636 // and we treat them as relocatable objects.
2637 if (et
== elfcpp::ET_REL
2638 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2640 Powerpc_relobj
<size
, big_endian
>* obj
=
2641 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2645 else if (et
== elfcpp::ET_DYN
)
2647 Powerpc_dynobj
<size
, big_endian
>* obj
=
2648 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2654 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2659 template<int size
, bool big_endian
>
2660 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2663 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2664 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2666 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2667 : Output_data_got
<size
, big_endian
>(),
2668 symtab_(symtab
), layout_(layout
),
2669 header_ent_cnt_(size
== 32 ? 3 : 1),
2670 header_index_(size
== 32 ? 0x2000 : 0)
2673 this->set_addralign(256);
2676 // Override all the Output_data_got methods we use so as to first call
2679 add_global(Symbol
* gsym
, unsigned int got_type
)
2681 this->reserve_ent();
2682 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2686 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2688 this->reserve_ent();
2689 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2693 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2694 { return this->add_global_plt(gsym
, got_type
); }
2697 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2698 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2700 this->reserve_ent();
2701 Output_data_got
<size
, big_endian
>::
2702 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2706 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2707 Output_data_reloc_generic
* rel_dyn
,
2708 unsigned int r_type_1
, unsigned int r_type_2
)
2710 if (gsym
->has_got_offset(got_type
))
2713 this->reserve_ent(2);
2714 Output_data_got
<size
, big_endian
>::
2715 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2719 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2721 this->reserve_ent();
2722 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2727 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2729 this->reserve_ent();
2730 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2735 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2736 { return this->add_local_plt(object
, sym_index
, got_type
); }
2739 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2740 unsigned int got_type
,
2741 Output_data_reloc_generic
* rel_dyn
,
2742 unsigned int r_type
)
2744 if (object
->local_has_got_offset(sym_index
, got_type
))
2747 this->reserve_ent(2);
2748 Output_data_got
<size
, big_endian
>::
2749 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2753 add_constant(Valtype constant
)
2755 this->reserve_ent();
2756 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2760 add_constant_pair(Valtype c1
, Valtype c2
)
2762 this->reserve_ent(2);
2763 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2766 // Offset of _GLOBAL_OFFSET_TABLE_.
2770 return this->got_offset(this->header_index_
);
2773 // Offset of base used to access the GOT/TOC.
2774 // The got/toc pointer reg will be set to this value.
2776 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2779 return this->g_o_t();
2781 return (this->output_section()->address()
2782 + object
->toc_base_offset()
2786 // Ensure our GOT has a header.
2788 set_final_data_size()
2790 if (this->header_ent_cnt_
!= 0)
2791 this->make_header();
2792 Output_data_got
<size
, big_endian
>::set_final_data_size();
2795 // First word of GOT header needs some values that are not
2796 // handled by Output_data_got so poke them in here.
2797 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2799 do_write(Output_file
* of
)
2802 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2803 val
= this->layout_
->dynamic_section()->address();
2805 val
= this->output_section()->address() + 0x8000;
2806 this->replace_constant(this->header_index_
, val
);
2807 Output_data_got
<size
, big_endian
>::do_write(of
);
2812 reserve_ent(unsigned int cnt
= 1)
2814 if (this->header_ent_cnt_
== 0)
2816 if (this->num_entries() + cnt
> this->header_index_
)
2817 this->make_header();
2823 this->header_ent_cnt_
= 0;
2824 this->header_index_
= this->num_entries();
2827 Output_data_got
<size
, big_endian
>::add_constant(0);
2828 Output_data_got
<size
, big_endian
>::add_constant(0);
2829 Output_data_got
<size
, big_endian
>::add_constant(0);
2831 // Define _GLOBAL_OFFSET_TABLE_ at the header
2832 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2835 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2836 sym
->set_value(this->g_o_t());
2839 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2840 Symbol_table::PREDEFINED
,
2841 this, this->g_o_t(), 0,
2844 elfcpp::STV_HIDDEN
, 0,
2848 Output_data_got
<size
, big_endian
>::add_constant(0);
2851 // Stashed pointers.
2852 Symbol_table
* symtab_
;
2856 unsigned int header_ent_cnt_
;
2857 // GOT header index.
2858 unsigned int header_index_
;
2861 // Get the GOT section, creating it if necessary.
2863 template<int size
, bool big_endian
>
2864 Output_data_got_powerpc
<size
, big_endian
>*
2865 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2868 if (this->got_
== NULL
)
2870 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2873 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2875 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2876 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2877 this->got_
, ORDER_DATA
, false);
2883 // Get the dynamic reloc section, creating it if necessary.
2885 template<int size
, bool big_endian
>
2886 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2887 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2889 if (this->rela_dyn_
== NULL
)
2891 gold_assert(layout
!= NULL
);
2892 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2893 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2894 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2895 ORDER_DYNAMIC_RELOCS
, false);
2897 return this->rela_dyn_
;
2900 // Similarly, but for ifunc symbols get the one for ifunc.
2902 template<int size
, bool big_endian
>
2903 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2904 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2909 return this->rela_dyn_section(layout
);
2911 if (this->iplt_
== NULL
)
2912 this->make_iplt_section(symtab
, layout
);
2913 return this->iplt_
->rel_plt();
2919 // Determine the stub group size. The group size is the absolute
2920 // value of the parameter --stub-group-size. If --stub-group-size
2921 // is passed a negative value, we restrict stubs to be always after
2922 // the stubbed branches.
2923 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2924 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2925 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2926 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2927 owner_(NULL
), output_section_(NULL
)
2931 // Return true iff input section can be handled by current stub
2934 can_add_to_stub_group(Output_section
* o
,
2935 const Output_section::Input_section
* i
,
2938 const Output_section::Input_section
*
2944 { return output_section_
; }
2947 set_output_and_owner(Output_section
* o
,
2948 const Output_section::Input_section
* i
)
2950 this->output_section_
= o
;
2959 // Adding group sections before the stubs.
2960 FINDING_STUB_SECTION
,
2961 // Adding group sections after the stubs.
2965 uint32_t stub_group_size_
;
2966 bool stubs_always_after_branch_
;
2967 bool suppress_size_errors_
;
2968 // True if a stub group can serve multiple output sections.
2971 // Current max size of group. Starts at stub_group_size_ but is
2972 // reduced to stub_group_size_/1024 on seeing a section with
2973 // external conditional branches.
2974 uint32_t group_size_
;
2975 uint64_t group_start_addr_
;
2976 // owner_ and output_section_ specify the section to which stubs are
2977 // attached. The stubs are placed at the end of this section.
2978 const Output_section::Input_section
* owner_
;
2979 Output_section
* output_section_
;
2982 // Return true iff input section can be handled by current stub
2983 // group. Sections are presented to this function in order,
2984 // so the first section is the head of the group.
2987 Stub_control::can_add_to_stub_group(Output_section
* o
,
2988 const Output_section::Input_section
* i
,
2991 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2993 uint64_t start_addr
= o
->address();
2996 // .init and .fini sections are pasted together to form a single
2997 // function. We can't be adding stubs in the middle of the function.
2998 this_size
= o
->data_size();
3001 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
3002 this_size
= i
->data_size();
3005 uint64_t end_addr
= start_addr
+ this_size
;
3006 uint32_t group_size
= this->stub_group_size_
;
3008 this->group_size_
= group_size
= group_size
>> 10;
3010 if (this_size
> group_size
&& !this->suppress_size_errors_
)
3011 gold_warning(_("%s:%s exceeds group size"),
3012 i
->relobj()->name().c_str(),
3013 i
->relobj()->section_name(i
->shndx()).c_str());
3015 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
3016 has14
? " 14bit" : "",
3017 i
->relobj()->name().c_str(),
3018 i
->relobj()->section_name(i
->shndx()).c_str(),
3019 (long long) this_size
,
3020 (this->state_
== NO_GROUP
3022 : (long long) end_addr
- this->group_start_addr_
));
3024 if (this->state_
== NO_GROUP
)
3026 // Only here on very first use of Stub_control
3028 this->output_section_
= o
;
3029 this->state_
= FINDING_STUB_SECTION
;
3030 this->group_size_
= group_size
;
3031 this->group_start_addr_
= start_addr
;
3034 else if (!this->multi_os_
&& this->output_section_
!= o
)
3036 else if (this->state_
== HAS_STUB_SECTION
)
3038 // Can we add this section, which is after the stubs, to the
3040 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
3043 else if (this->state_
== FINDING_STUB_SECTION
)
3045 if ((whole_sec
&& this->output_section_
== o
)
3046 || end_addr
- this->group_start_addr_
<= this->group_size_
)
3048 // Stubs are added at the end of "owner_".
3050 this->output_section_
= o
;
3053 // The group before the stubs has reached maximum size.
3054 // Now see about adding sections after the stubs to the
3055 // group. If the current section has a 14-bit branch and
3056 // the group before the stubs exceeds group_size_ (because
3057 // they didn't have 14-bit branches), don't add sections
3058 // after the stubs: The size of stubs for such a large
3059 // group may exceed the reach of a 14-bit branch.
3060 if (!this->stubs_always_after_branch_
3061 && this_size
<= this->group_size_
3062 && start_addr
- this->group_start_addr_
<= this->group_size_
)
3064 gold_debug(DEBUG_TARGET
, "adding after stubs");
3065 this->state_
= HAS_STUB_SECTION
;
3066 this->group_start_addr_
= start_addr
;
3073 gold_debug(DEBUG_TARGET
,
3074 !this->multi_os_
&& this->output_section_
!= o
3075 ? "nope, new output section\n"
3076 : "nope, didn't fit\n");
3078 // The section fails to fit in the current group. Set up a few
3079 // things for the next group. owner_ and output_section_ will be
3080 // set later after we've retrieved those values for the current
3082 this->state_
= FINDING_STUB_SECTION
;
3083 this->group_size_
= group_size
;
3084 this->group_start_addr_
= start_addr
;
3088 // Look over all the input sections, deciding where to place stubs.
3090 template<int size
, bool big_endian
>
3092 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
3094 bool no_size_errors
)
3096 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
3097 parameters
->options().stub_group_multi());
3099 // Group input sections and insert stub table
3100 Stub_table_owner
* table_owner
= NULL
;
3101 std::vector
<Stub_table_owner
*> tables
;
3102 Layout::Section_list section_list
;
3103 layout
->get_executable_sections(§ion_list
);
3104 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
3105 for (Layout::Section_list::iterator o
= section_list
.begin();
3106 o
!= section_list
.end();
3109 typedef Output_section::Input_section_list Input_section_list
;
3110 for (Input_section_list::const_iterator i
3111 = (*o
)->input_sections().begin();
3112 i
!= (*o
)->input_sections().end();
3115 if (i
->is_input_section()
3116 || i
->is_relaxed_input_section())
3118 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3119 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
3120 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
3121 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
3123 table_owner
->output_section
= stub_control
.output_section();
3124 table_owner
->owner
= stub_control
.owner();
3125 stub_control
.set_output_and_owner(*o
, &*i
);
3128 if (table_owner
== NULL
)
3130 table_owner
= new Stub_table_owner
;
3131 tables
.push_back(table_owner
);
3133 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
3137 if (table_owner
!= NULL
)
3139 table_owner
->output_section
= stub_control
.output_section();
3140 table_owner
->owner
= stub_control
.owner();;
3142 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
3146 Stub_table
<size
, big_endian
>* stub_table
;
3148 if ((*t
)->owner
->is_input_section())
3149 stub_table
= new Stub_table
<size
, big_endian
>(this,
3150 (*t
)->output_section
,
3152 this->stub_tables_
.size());
3153 else if ((*t
)->owner
->is_relaxed_input_section())
3154 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
3155 (*t
)->owner
->relaxed_input_section());
3158 this->stub_tables_
.push_back(stub_table
);
3163 static unsigned long
3164 max_branch_delta (unsigned int r_type
)
3166 if (r_type
== elfcpp::R_POWERPC_REL14
3167 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
3168 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
3170 if (r_type
== elfcpp::R_POWERPC_REL24
3171 || r_type
== elfcpp::R_PPC_PLTREL24
3172 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
3177 // Return whether this branch is going via a plt call stub.
3179 template<int size
, bool big_endian
>
3181 Target_powerpc
<size
, big_endian
>::Branch_info::mark_pltcall(
3182 Powerpc_relobj
<size
, big_endian
>* ppc_object
,
3185 Target_powerpc
* target
,
3186 Symbol_table
* symtab
)
3188 if (this->object_
!= ppc_object
3189 || this->shndx_
!= shndx
3190 || this->offset_
!= offset
)
3193 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3194 if (sym
!= NULL
&& sym
->is_forwarder())
3195 sym
= symtab
->resolve_forwards(sym
);
3196 if (target
->replace_tls_get_addr(sym
))
3197 sym
= target
->tls_get_addr_opt();
3198 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3200 ? (gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3201 && !target
->is_elfv2_localentry0(gsym
))
3202 : (this->object_
->local_has_plt_offset(this->r_sym_
)
3203 && !target
->is_elfv2_localentry0(this->object_
, this->r_sym_
)))
3211 // If this branch needs a plt call stub, or a long branch stub, make one.
3213 template<int size
, bool big_endian
>
3215 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
3216 Stub_table
<size
, big_endian
>* stub_table
,
3217 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
3218 Symbol_table
* symtab
) const
3220 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3221 Target_powerpc
<size
, big_endian
>* target
=
3222 static_cast<Target_powerpc
<size
, big_endian
>*>(
3223 parameters
->sized_target
<size
, big_endian
>());
3224 if (sym
!= NULL
&& sym
->is_forwarder())
3225 sym
= symtab
->resolve_forwards(sym
);
3226 if (target
->replace_tls_get_addr(sym
))
3227 sym
= target
->tls_get_addr_opt();
3228 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3232 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3233 : this->object_
->local_has_plt_offset(this->r_sym_
))
3237 && target
->abiversion() >= 2
3238 && !parameters
->options().output_is_position_independent()
3239 && !is_branch_reloc(this->r_type_
))
3240 target
->glink_section()->add_global_entry(gsym
);
3243 if (stub_table
== NULL
3246 && !parameters
->options().output_is_position_independent()
3247 && !is_branch_reloc(this->r_type_
)))
3248 stub_table
= this->object_
->stub_table(this->shndx_
);
3249 if (stub_table
== NULL
)
3251 // This is a ref from a data section to an ifunc symbol,
3252 // or a non-branch reloc for which we always want to use
3253 // one set of stubs for resolving function addresses.
3254 stub_table
= ifunc_stub_table
;
3256 gold_assert(stub_table
!= NULL
);
3257 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3258 if (from
!= invalid_address
)
3259 from
+= (this->object_
->output_section(this->shndx_
)->address()
3262 ok
= stub_table
->add_plt_call_entry(from
,
3263 this->object_
, gsym
,
3264 this->r_type_
, this->addend_
,
3267 ok
= stub_table
->add_plt_call_entry(from
,
3268 this->object_
, this->r_sym_
,
3269 this->r_type_
, this->addend_
,
3275 Address max_branch_offset
= max_branch_delta(this->r_type_
);
3276 if (max_branch_offset
== 0)
3278 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3279 gold_assert(from
!= invalid_address
);
3280 from
+= (this->object_
->output_section(this->shndx_
)->address()
3285 switch (gsym
->source())
3287 case Symbol::FROM_OBJECT
:
3289 Object
* symobj
= gsym
->object();
3290 if (symobj
->is_dynamic()
3291 || symobj
->pluginobj() != NULL
)
3294 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
3295 if (shndx
== elfcpp::SHN_UNDEF
)
3300 case Symbol::IS_UNDEFINED
:
3306 Symbol_table::Compute_final_value_status status
;
3307 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
3308 if (status
!= Symbol_table::CFVS_OK
)
3311 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
3315 const Symbol_value
<size
>* psymval
3316 = this->object_
->local_symbol(this->r_sym_
);
3317 Symbol_value
<size
> symval
;
3318 if (psymval
->is_section_symbol())
3319 symval
.set_is_section_symbol();
3320 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
3321 typename
ObjType::Compute_final_local_value_status status
3322 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
3324 if (status
!= ObjType::CFLV_OK
3325 || !symval
.has_output_value())
3327 to
= symval
.value(this->object_
, 0);
3329 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
3331 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
3332 to
+= this->addend_
;
3333 if (stub_table
== NULL
)
3334 stub_table
= this->object_
->stub_table(this->shndx_
);
3335 if (size
== 64 && target
->abiversion() < 2)
3337 unsigned int dest_shndx
;
3338 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
3342 Address delta
= to
- from
;
3343 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
3345 if (stub_table
== NULL
)
3347 gold_warning(_("%s:%s: branch in non-executable section,"
3348 " no long branch stub for you"),
3349 this->object_
->name().c_str(),
3350 this->object_
->section_name(this->shndx_
).c_str());
3353 bool save_res
= (size
== 64
3355 && gsym
->source() == Symbol::IN_OUTPUT_DATA
3356 && gsym
->output_data() == target
->savres_section());
3357 ok
= stub_table
->add_long_branch_entry(this->object_
,
3359 from
, to
, save_res
);
3363 gold_debug(DEBUG_TARGET
,
3364 "branch at %s:%s+%#lx\n"
3365 "can't reach stub attached to %s:%s",
3366 this->object_
->name().c_str(),
3367 this->object_
->section_name(this->shndx_
).c_str(),
3368 (unsigned long) this->offset_
,
3369 stub_table
->relobj()->name().c_str(),
3370 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3375 // Relaxation hook. This is where we do stub generation.
3377 template<int size
, bool big_endian
>
3379 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3380 const Input_objects
*,
3381 Symbol_table
* symtab
,
3385 unsigned int prev_brlt_size
= 0;
3389 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3391 && this->abiversion() < 2
3393 && !parameters
->options().user_set_plt_thread_safe())
3395 static const char* const thread_starter
[] =
3399 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3401 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3402 "mq_notify", "create_timer",
3407 "GOMP_parallel_start",
3408 "GOMP_parallel_loop_static",
3409 "GOMP_parallel_loop_static_start",
3410 "GOMP_parallel_loop_dynamic",
3411 "GOMP_parallel_loop_dynamic_start",
3412 "GOMP_parallel_loop_guided",
3413 "GOMP_parallel_loop_guided_start",
3414 "GOMP_parallel_loop_runtime",
3415 "GOMP_parallel_loop_runtime_start",
3416 "GOMP_parallel_sections",
3417 "GOMP_parallel_sections_start",
3422 if (parameters
->options().shared())
3426 for (unsigned int i
= 0;
3427 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3430 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3431 thread_safe
= (sym
!= NULL
3433 && sym
->in_real_elf());
3439 this->plt_thread_safe_
= thread_safe
;
3444 this->stub_group_size_
= parameters
->options().stub_group_size();
3445 bool no_size_errors
= true;
3446 if (this->stub_group_size_
== 1)
3447 this->stub_group_size_
= 0x1c00000;
3448 else if (this->stub_group_size_
== -1)
3449 this->stub_group_size_
= -0x1e00000;
3451 no_size_errors
= false;
3452 this->group_sections(layout
, task
, no_size_errors
);
3454 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3456 this->branch_lookup_table_
.clear();
3457 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3458 p
!= this->stub_tables_
.end();
3461 (*p
)->clear_stubs(true);
3463 this->stub_tables_
.clear();
3464 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3465 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3466 program_name
, this->stub_group_size_
);
3467 this->group_sections(layout
, task
, true);
3470 // We need address of stub tables valid for make_stub.
3471 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3472 p
!= this->stub_tables_
.end();
3475 const Powerpc_relobj
<size
, big_endian
>* object
3476 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3477 Address off
= object
->get_output_section_offset((*p
)->shndx());
3478 gold_assert(off
!= invalid_address
);
3479 Output_section
* os
= (*p
)->output_section();
3480 (*p
)->set_address_and_size(os
, off
);
3485 // Clear plt call stubs, long branch stubs and branch lookup table.
3486 prev_brlt_size
= this->branch_lookup_table_
.size();
3487 this->branch_lookup_table_
.clear();
3488 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3489 p
!= this->stub_tables_
.end();
3492 (*p
)->clear_stubs(false);
3496 // Build all the stubs.
3497 this->relax_failed_
= false;
3498 Stub_table
<size
, big_endian
>* ifunc_stub_table
3499 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3500 Stub_table
<size
, big_endian
>* one_stub_table
3501 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3502 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3503 b
!= this->branch_info_
.end();
3506 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3507 && !this->relax_failed_
)
3509 this->relax_failed_
= true;
3510 this->relax_fail_count_
++;
3511 if (this->relax_fail_count_
< 3)
3516 // Did anything change size?
3517 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3518 bool again
= num_huge_branches
!= prev_brlt_size
;
3519 if (size
== 64 && num_huge_branches
!= 0)
3520 this->make_brlt_section(layout
);
3521 if (size
== 64 && again
)
3522 this->brlt_section_
->set_current_size(num_huge_branches
);
3524 for (typename
Stub_tables::reverse_iterator p
= this->stub_tables_
.rbegin();
3525 p
!= this->stub_tables_
.rend();
3527 (*p
)->remove_eh_frame(layout
);
3529 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3530 p
!= this->stub_tables_
.end();
3532 (*p
)->add_eh_frame(layout
);
3534 typedef Unordered_set
<Output_section
*> Output_sections
;
3535 Output_sections os_need_update
;
3536 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3537 p
!= this->stub_tables_
.end();
3540 if ((*p
)->size_update())
3543 os_need_update
.insert((*p
)->output_section());
3547 // Set output section offsets for all input sections in an output
3548 // section that just changed size. Anything past the stubs will
3550 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3551 p
!= os_need_update
.end();
3554 Output_section
* os
= *p
;
3556 typedef Output_section::Input_section_list Input_section_list
;
3557 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3558 i
!= os
->input_sections().end();
3561 off
= align_address(off
, i
->addralign());
3562 if (i
->is_input_section() || i
->is_relaxed_input_section())
3563 i
->relobj()->set_section_offset(i
->shndx(), off
);
3564 if (i
->is_relaxed_input_section())
3566 Stub_table
<size
, big_endian
>* stub_table
3567 = static_cast<Stub_table
<size
, big_endian
>*>(
3568 i
->relaxed_input_section());
3569 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3570 off
+= stub_table_size
;
3571 // After a few iterations, set current stub table size
3572 // as min size threshold, so later stub tables can only
3575 stub_table
->set_min_size_threshold(stub_table_size
);
3578 off
+= i
->data_size();
3580 // If .branch_lt is part of this output section, then we have
3581 // just done the offset adjustment.
3582 os
->clear_section_offsets_need_adjustment();
3587 && num_huge_branches
!= 0
3588 && parameters
->options().output_is_position_independent())
3590 // Fill in the BRLT relocs.
3591 this->brlt_section_
->reset_brlt_sizes();
3592 for (typename
Branch_lookup_table::const_iterator p
3593 = this->branch_lookup_table_
.begin();
3594 p
!= this->branch_lookup_table_
.end();
3597 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3599 this->brlt_section_
->finalize_brlt_sizes();
3603 && (parameters
->options().user_set_emit_stub_syms()
3604 ? parameters
->options().emit_stub_syms()
3606 || parameters
->options().output_is_position_independent()
3607 || parameters
->options().emit_relocs())))
3609 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3610 p
!= this->stub_tables_
.end();
3612 (*p
)->define_stub_syms(symtab
);
3614 if (this->glink_
!= NULL
)
3616 int stub_size
= this->glink_
->pltresolve_size();
3617 Address value
= -stub_size
;
3623 this->define_local(symtab
, "__glink_PLTresolve",
3624 this->glink_
, value
, stub_size
);
3627 this->define_local(symtab
, "__glink", this->glink_
, 0, 0);
3634 template<int size
, bool big_endian
>
3636 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3637 unsigned char* oview
,
3641 uint64_t address
= plt
->address();
3642 off_t len
= plt
->data_size();
3644 if (plt
== this->glink_
)
3646 // See Output_data_glink::do_write() for glink contents.
3649 gold_assert(parameters
->doing_static_link());
3650 // Static linking may need stubs, to support ifunc and long
3651 // branches. We need to create an output section for
3652 // .eh_frame early in the link process, to have a place to
3653 // attach stub .eh_frame info. We also need to have
3654 // registered a CIE that matches the stub CIE. Both of
3655 // these requirements are satisfied by creating an FDE and
3656 // CIE for .glink, even though static linking will leave
3657 // .glink zero length.
3658 // ??? Hopefully generating an FDE with a zero address range
3659 // won't confuse anything that consumes .eh_frame info.
3661 else if (size
== 64)
3663 // There is one word before __glink_PLTresolve
3667 else if (parameters
->options().output_is_position_independent())
3669 // There are two FDEs for a position independent glink.
3670 // The first covers the branch table, the second
3671 // __glink_PLTresolve at the end of glink.
3672 off_t resolve_size
= this->glink_
->pltresolve_size();
3673 if (oview
[9] == elfcpp::DW_CFA_nop
)
3674 len
-= resolve_size
;
3677 address
+= len
- resolve_size
;
3684 // Must be a stub table.
3685 const Stub_table
<size
, big_endian
>* stub_table
3686 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3687 uint64_t stub_address
= stub_table
->stub_address();
3688 len
-= stub_address
- address
;
3689 address
= stub_address
;
3692 *paddress
= address
;
3696 // A class to handle the PLT data.
3698 template<int size
, bool big_endian
>
3699 class Output_data_plt_powerpc
: public Output_section_data_build
3702 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3703 size
, big_endian
> Reloc_section
;
3705 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3706 Reloc_section
* plt_rel
,
3708 : Output_section_data_build(size
== 32 ? 4 : 8),
3714 // Add an entry to the PLT.
3719 add_ifunc_entry(Symbol
*);
3722 add_local_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3725 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3727 // Return the .rela.plt section data.
3734 // Return the number of PLT entries.
3738 if (this->current_data_size() == 0)
3740 return ((this->current_data_size() - this->first_plt_entry_offset())
3741 / this->plt_entry_size());
3746 do_adjust_output_section(Output_section
* os
)
3751 // Write to a map file.
3753 do_print_to_mapfile(Mapfile
* mapfile
) const
3754 { mapfile
->print_output_data(this, this->name_
); }
3757 // Return the offset of the first non-reserved PLT entry.
3759 first_plt_entry_offset() const
3761 // IPLT and LPLT have no reserved entry.
3762 if (this->name_
[3] == 'I' || this->name_
[3] == 'L')
3764 return this->targ_
->first_plt_entry_offset();
3767 // Return the size of each PLT entry.
3769 plt_entry_size() const
3771 return this->targ_
->plt_entry_size();
3774 // Write out the PLT data.
3776 do_write(Output_file
*);
3778 // The reloc section.
3779 Reloc_section
* rel_
;
3780 // Allows access to .glink for do_write.
3781 Target_powerpc
<size
, big_endian
>* targ_
;
3782 // What to report in map file.
3786 // Add an entry to the PLT.
3788 template<int size
, bool big_endian
>
3790 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3792 if (!gsym
->has_plt_offset())
3794 section_size_type off
= this->current_data_size();
3796 off
+= this->first_plt_entry_offset();
3797 gsym
->set_plt_offset(off
);
3798 gsym
->set_needs_dynsym_entry();
3799 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3800 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3801 off
+= this->plt_entry_size();
3802 this->set_current_data_size(off
);
3806 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3808 template<int size
, bool big_endian
>
3810 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3812 if (!gsym
->has_plt_offset())
3814 section_size_type off
= this->current_data_size();
3815 gsym
->set_plt_offset(off
);
3816 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3817 if (size
== 64 && this->targ_
->abiversion() < 2)
3818 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3819 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3820 off
+= this->plt_entry_size();
3821 this->set_current_data_size(off
);
3825 // Add an entry for a local symbol to the PLT.
3827 template<int size
, bool big_endian
>
3829 Output_data_plt_powerpc
<size
, big_endian
>::add_local_entry(
3830 Sized_relobj_file
<size
, big_endian
>* relobj
,
3831 unsigned int local_sym_index
)
3833 if (!relobj
->local_has_plt_offset(local_sym_index
))
3835 section_size_type off
= this->current_data_size();
3836 relobj
->set_local_plt_offset(local_sym_index
, off
);
3839 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3840 if (size
== 64 && this->targ_
->abiversion() < 2)
3841 dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3842 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
,
3843 dynrel
, this, off
, 0);
3845 off
+= this->plt_entry_size();
3846 this->set_current_data_size(off
);
3850 // Add an entry for a local ifunc symbol to the IPLT.
3852 template<int size
, bool big_endian
>
3854 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3855 Sized_relobj_file
<size
, big_endian
>* relobj
,
3856 unsigned int local_sym_index
)
3858 if (!relobj
->local_has_plt_offset(local_sym_index
))
3860 section_size_type off
= this->current_data_size();
3861 relobj
->set_local_plt_offset(local_sym_index
, off
);
3862 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3863 if (size
== 64 && this->targ_
->abiversion() < 2)
3864 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3865 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3867 off
+= this->plt_entry_size();
3868 this->set_current_data_size(off
);
3872 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3873 static const uint32_t add_2_2_11
= 0x7c425a14;
3874 static const uint32_t add_2_2_12
= 0x7c426214;
3875 static const uint32_t add_3_3_2
= 0x7c631214;
3876 static const uint32_t add_3_3_13
= 0x7c636a14;
3877 static const uint32_t add_3_12_2
= 0x7c6c1214;
3878 static const uint32_t add_3_12_13
= 0x7c6c6a14;
3879 static const uint32_t add_11_0_11
= 0x7d605a14;
3880 static const uint32_t add_11_2_11
= 0x7d625a14;
3881 static const uint32_t add_11_11_2
= 0x7d6b1214;
3882 static const uint32_t addi_0_12
= 0x380c0000;
3883 static const uint32_t addi_2_2
= 0x38420000;
3884 static const uint32_t addi_3_3
= 0x38630000;
3885 static const uint32_t addi_11_11
= 0x396b0000;
3886 static const uint32_t addi_12_1
= 0x39810000;
3887 static const uint32_t addi_12_12
= 0x398c0000;
3888 static const uint32_t addis_0_2
= 0x3c020000;
3889 static const uint32_t addis_0_13
= 0x3c0d0000;
3890 static const uint32_t addis_2_12
= 0x3c4c0000;
3891 static const uint32_t addis_11_2
= 0x3d620000;
3892 static const uint32_t addis_11_11
= 0x3d6b0000;
3893 static const uint32_t addis_11_30
= 0x3d7e0000;
3894 static const uint32_t addis_12_1
= 0x3d810000;
3895 static const uint32_t addis_12_2
= 0x3d820000;
3896 static const uint32_t addis_12_12
= 0x3d8c0000;
3897 static const uint32_t b
= 0x48000000;
3898 static const uint32_t bcl_20_31
= 0x429f0005;
3899 static const uint32_t bctr
= 0x4e800420;
3900 static const uint32_t bctrl
= 0x4e800421;
3901 static const uint32_t beqlr
= 0x4d820020;
3902 static const uint32_t blr
= 0x4e800020;
3903 static const uint32_t bnectr_p4
= 0x4ce20420;
3904 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3905 static const uint32_t cmpldi_2_0
= 0x28220000;
3906 static const uint32_t cmpdi_11_0
= 0x2c2b0000;
3907 static const uint32_t cmpwi_11_0
= 0x2c0b0000;
3908 static const uint32_t cror_15_15_15
= 0x4def7b82;
3909 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3910 static const uint32_t ld_0_1
= 0xe8010000;
3911 static const uint32_t ld_0_12
= 0xe80c0000;
3912 static const uint32_t ld_2_1
= 0xe8410000;
3913 static const uint32_t ld_2_2
= 0xe8420000;
3914 static const uint32_t ld_2_11
= 0xe84b0000;
3915 static const uint32_t ld_2_12
= 0xe84c0000;
3916 static const uint32_t ld_11_1
= 0xe9610000;
3917 static const uint32_t ld_11_2
= 0xe9620000;
3918 static const uint32_t ld_11_3
= 0xe9630000;
3919 static const uint32_t ld_11_11
= 0xe96b0000;
3920 static const uint32_t ld_12_2
= 0xe9820000;
3921 static const uint32_t ld_12_3
= 0xe9830000;
3922 static const uint32_t ld_12_11
= 0xe98b0000;
3923 static const uint32_t ld_12_12
= 0xe98c0000;
3924 static const uint32_t lfd_0_1
= 0xc8010000;
3925 static const uint32_t li_0_0
= 0x38000000;
3926 static const uint32_t li_12_0
= 0x39800000;
3927 static const uint32_t lis_0
= 0x3c000000;
3928 static const uint32_t lis_2
= 0x3c400000;
3929 static const uint32_t lis_11
= 0x3d600000;
3930 static const uint32_t lis_12
= 0x3d800000;
3931 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3932 static const uint32_t lwz_0_12
= 0x800c0000;
3933 static const uint32_t lwz_11_3
= 0x81630000;
3934 static const uint32_t lwz_11_11
= 0x816b0000;
3935 static const uint32_t lwz_11_30
= 0x817e0000;
3936 static const uint32_t lwz_12_3
= 0x81830000;
3937 static const uint32_t lwz_12_12
= 0x818c0000;
3938 static const uint32_t lwzu_0_12
= 0x840c0000;
3939 static const uint32_t mflr_0
= 0x7c0802a6;
3940 static const uint32_t mflr_11
= 0x7d6802a6;
3941 static const uint32_t mflr_12
= 0x7d8802a6;
3942 static const uint32_t mr_0_3
= 0x7c601b78;
3943 static const uint32_t mr_3_0
= 0x7c030378;
3944 static const uint32_t mtctr_0
= 0x7c0903a6;
3945 static const uint32_t mtctr_11
= 0x7d6903a6;
3946 static const uint32_t mtctr_12
= 0x7d8903a6;
3947 static const uint32_t mtlr_0
= 0x7c0803a6;
3948 static const uint32_t mtlr_11
= 0x7d6803a6;
3949 static const uint32_t mtlr_12
= 0x7d8803a6;
3950 static const uint32_t nop
= 0x60000000;
3951 static const uint32_t ori_0_0_0
= 0x60000000;
3952 static const uint32_t srdi_0_0_2
= 0x7800f082;
3953 static const uint32_t std_0_1
= 0xf8010000;
3954 static const uint32_t std_0_12
= 0xf80c0000;
3955 static const uint32_t std_2_1
= 0xf8410000;
3956 static const uint32_t std_11_1
= 0xf9610000;
3957 static const uint32_t stfd_0_1
= 0xd8010000;
3958 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3959 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3960 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3961 static const uint32_t xor_2_12_12
= 0x7d826278;
3962 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3964 // Write out the PLT.
3966 template<int size
, bool big_endian
>
3968 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3970 if (size
== 32 && (this->name_
[3] != 'I' && this->name_
[3] != 'L'))
3972 const section_size_type offset
= this->offset();
3973 const section_size_type oview_size
3974 = convert_to_section_size_type(this->data_size());
3975 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3976 unsigned char* pov
= oview
;
3977 unsigned char* endpov
= oview
+ oview_size
;
3979 // The address of the .glink branch table
3980 const Output_data_glink
<size
, big_endian
>* glink
3981 = this->targ_
->glink_section();
3982 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3984 while (pov
< endpov
)
3986 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3991 of
->write_output_view(offset
, oview_size
, oview
);
3995 // Create the PLT section.
3997 template<int size
, bool big_endian
>
3999 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
4002 if (this->plt_
== NULL
)
4004 if (this->got_
== NULL
)
4005 this->got_section(symtab
, layout
);
4007 if (this->glink_
== NULL
)
4008 make_glink_section(layout
);
4010 // Ensure that .rela.dyn always appears before .rela.plt This is
4011 // necessary due to how, on PowerPC and some other targets, .rela.dyn
4012 // needs to include .rela.plt in its range.
4013 this->rela_dyn_section(layout
);
4015 Reloc_section
* plt_rel
= new Reloc_section(false);
4016 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
4017 elfcpp::SHF_ALLOC
, plt_rel
,
4018 ORDER_DYNAMIC_PLT_RELOCS
, false);
4020 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
4022 layout
->add_output_section_data(".plt",
4024 ? elfcpp::SHT_PROGBITS
4025 : elfcpp::SHT_NOBITS
),
4026 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4033 Output_section
* rela_plt_os
= plt_rel
->output_section();
4034 rela_plt_os
->set_info_section(this->plt_
->output_section());
4038 // Create the IPLT section.
4040 template<int size
, bool big_endian
>
4042 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
4045 if (this->iplt_
== NULL
)
4047 this->make_plt_section(symtab
, layout
);
4048 this->make_lplt_section(layout
);
4050 Reloc_section
* iplt_rel
= new Reloc_section(false);
4051 if (this->rela_dyn_
->output_section())
4052 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
4054 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
4056 if (this->plt_
->output_section())
4057 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
4061 // Create the LPLT section.
4063 template<int size
, bool big_endian
>
4065 Target_powerpc
<size
, big_endian
>::make_lplt_section(Layout
* layout
)
4067 if (this->lplt_
== NULL
)
4069 Reloc_section
* lplt_rel
= NULL
;
4070 if (parameters
->options().output_is_position_independent())
4072 lplt_rel
= new Reloc_section(false);
4073 this->rela_dyn_section(layout
);
4074 if (this->rela_dyn_
->output_section())
4075 this->rela_dyn_
->output_section()
4076 ->add_output_section_data(lplt_rel
);
4079 = new Output_data_plt_powerpc
<size
, big_endian
>(this, lplt_rel
,
4081 this->make_brlt_section(layout
);
4082 if (this->brlt_section_
&& this->brlt_section_
->output_section())
4083 this->brlt_section_
->output_section()
4084 ->add_output_section_data(this->lplt_
);
4086 layout
->add_output_section_data(".branch_lt",
4087 elfcpp::SHT_PROGBITS
,
4088 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4095 // A section for huge long branch addresses, similar to plt section.
4097 template<int size
, bool big_endian
>
4098 class Output_data_brlt_powerpc
: public Output_section_data_build
4101 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4102 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
4103 size
, big_endian
> Reloc_section
;
4105 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
4106 Reloc_section
* brlt_rel
)
4107 : Output_section_data_build(size
== 32 ? 4 : 8),
4115 this->reset_data_size();
4116 this->rel_
->reset_data_size();
4120 finalize_brlt_sizes()
4122 this->finalize_data_size();
4123 this->rel_
->finalize_data_size();
4126 // Add a reloc for an entry in the BRLT.
4128 add_reloc(Address to
, unsigned int off
)
4129 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
4131 // Update section and reloc section size.
4133 set_current_size(unsigned int num_branches
)
4135 this->reset_address_and_file_offset();
4136 this->set_current_data_size(num_branches
* 16);
4137 this->finalize_data_size();
4138 Output_section
* os
= this->output_section();
4139 os
->set_section_offsets_need_adjustment();
4140 if (this->rel_
!= NULL
)
4142 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
4143 this->rel_
->reset_address_and_file_offset();
4144 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
4145 this->rel_
->finalize_data_size();
4146 Output_section
* os
= this->rel_
->output_section();
4147 os
->set_section_offsets_need_adjustment();
4153 do_adjust_output_section(Output_section
* os
)
4158 // Write to a map file.
4160 do_print_to_mapfile(Mapfile
* mapfile
) const
4161 { mapfile
->print_output_data(this, "** BRLT"); }
4164 // Write out the BRLT data.
4166 do_write(Output_file
*);
4168 // The reloc section.
4169 Reloc_section
* rel_
;
4170 Target_powerpc
<size
, big_endian
>* targ_
;
4173 // Make the branch lookup table section.
4175 template<int size
, bool big_endian
>
4177 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
4179 if (size
== 64 && this->brlt_section_
== NULL
)
4181 Reloc_section
* brlt_rel
= NULL
;
4182 bool is_pic
= parameters
->options().output_is_position_independent();
4185 // When PIC we can't fill in .branch_lt but must initialise at
4186 // runtime via dynamic relocations.
4187 this->rela_dyn_section(layout
);
4188 brlt_rel
= new Reloc_section(false);
4189 if (this->rela_dyn_
->output_section())
4190 this->rela_dyn_
->output_section()
4191 ->add_output_section_data(brlt_rel
);
4194 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
4195 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
4196 this->plt_
->output_section()
4197 ->add_output_section_data(this->brlt_section_
);
4199 layout
->add_output_section_data(".branch_lt",
4200 elfcpp::SHT_PROGBITS
,
4201 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4202 this->brlt_section_
,
4208 // Write out .branch_lt when non-PIC.
4210 template<int size
, bool big_endian
>
4212 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
4214 if (size
== 64 && !parameters
->options().output_is_position_independent())
4216 const section_size_type offset
= this->offset();
4217 const section_size_type oview_size
4218 = convert_to_section_size_type(this->data_size());
4219 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
4221 this->targ_
->write_branch_lookup_table(oview
);
4222 of
->write_output_view(offset
, oview_size
, oview
);
4226 static inline uint32_t
4232 static inline uint32_t
4238 static inline uint32_t
4241 return hi(a
+ 0x8000);
4247 static const unsigned char eh_frame_cie
[12];
4251 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
4254 'z', 'R', 0, // Augmentation string.
4255 4, // Code alignment.
4256 0x80 - size
/ 8 , // Data alignment.
4258 1, // Augmentation size.
4259 (elfcpp::DW_EH_PE_pcrel
4260 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
4261 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
4264 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
4265 static const unsigned char glink_eh_frame_fde_64v1
[] =
4267 0, 0, 0, 0, // Replaced with offset to .glink.
4268 0, 0, 0, 0, // Replaced with size of .glink.
4269 0, // Augmentation size.
4270 elfcpp::DW_CFA_advance_loc
+ 1,
4271 elfcpp::DW_CFA_register
, 65, 12,
4272 elfcpp::DW_CFA_advance_loc
+ 5,
4273 elfcpp::DW_CFA_restore_extended
, 65
4276 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
4277 static const unsigned char glink_eh_frame_fde_64v2
[] =
4279 0, 0, 0, 0, // Replaced with offset to .glink.
4280 0, 0, 0, 0, // Replaced with size of .glink.
4281 0, // Augmentation size.
4282 elfcpp::DW_CFA_advance_loc
+ 1,
4283 elfcpp::DW_CFA_register
, 65, 0,
4284 elfcpp::DW_CFA_advance_loc
+ 7,
4285 elfcpp::DW_CFA_restore_extended
, 65
4288 // Describe __glink_PLTresolve use of LR, 32-bit version.
4289 static const unsigned char glink_eh_frame_fde_32
[] =
4291 0, 0, 0, 0, // Replaced with offset to .glink.
4292 0, 0, 0, 0, // Replaced with size of .glink.
4293 0, // Augmentation size.
4294 elfcpp::DW_CFA_advance_loc
+ 2,
4295 elfcpp::DW_CFA_register
, 65, 0,
4296 elfcpp::DW_CFA_advance_loc
+ 4,
4297 elfcpp::DW_CFA_restore_extended
, 65
4300 static const unsigned char default_fde
[] =
4302 0, 0, 0, 0, // Replaced with offset to stubs.
4303 0, 0, 0, 0, // Replaced with size of stubs.
4304 0, // Augmentation size.
4305 elfcpp::DW_CFA_nop
, // Pad.
4310 template<bool big_endian
>
4312 write_insn(unsigned char* p
, uint32_t v
)
4314 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
4318 static inline unsigned int
4321 if (!parameters
->options().user_set_plt_align())
4322 return size
== 64 ? 32 : 8;
4323 return 1 << parameters
->options().plt_align();
4326 // Stub_table holds information about plt and long branch stubs.
4327 // Stubs are built in an area following some input section determined
4328 // by group_sections(). This input section is converted to a relaxed
4329 // input section allowing it to be resized to accommodate the stubs
4331 template<int size
, bool big_endian
>
4332 class Stub_table
: public Output_relaxed_input_section
4337 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4338 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4342 unsigned int indx_
: 30;
4343 unsigned int r2save_
: 1;
4344 unsigned int localentry0_
: 1;
4346 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4347 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4349 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4350 Output_section
* output_section
,
4351 const Output_section::Input_section
* owner
,
4353 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4355 ->section_addralign(owner
->shndx())),
4356 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4357 orig_data_size_(owner
->current_data_size()),
4358 plt_size_(0), last_plt_size_(0),
4359 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4360 need_save_res_(false), uniq_(id
), tls_get_addr_opt_bctrl_(-1u),
4363 this->set_output_section(output_section
);
4365 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4366 new_relaxed
.push_back(this);
4367 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4370 // Add a plt call stub.
4372 add_plt_call_entry(Address
,
4373 const Sized_relobj_file
<size
, big_endian
>*,
4380 add_plt_call_entry(Address
,
4381 const Sized_relobj_file
<size
, big_endian
>*,
4387 // Find a given plt call stub.
4389 find_plt_call_entry(const Symbol
*) const;
4392 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4393 unsigned int) const;
4396 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4402 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4407 // Add a long branch stub.
4409 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4410 unsigned int, Address
, Address
, bool);
4413 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4417 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4419 Address max_branch_offset
= max_branch_delta(r_type
);
4420 if (max_branch_offset
== 0)
4422 gold_assert(from
!= invalid_address
);
4423 Address loc
= off
+ this->stub_address();
4424 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4428 clear_stubs(bool all
)
4430 this->plt_call_stubs_
.clear();
4431 this->plt_size_
= 0;
4432 this->long_branch_stubs_
.clear();
4433 this->branch_size_
= 0;
4434 this->need_save_res_
= false;
4437 this->last_plt_size_
= 0;
4438 this->last_branch_size_
= 0;
4443 set_address_and_size(const Output_section
* os
, Address off
)
4445 Address start_off
= off
;
4446 off
+= this->orig_data_size_
;
4447 Address my_size
= this->plt_size_
+ this->branch_size_
;
4448 if (this->need_save_res_
)
4449 my_size
+= this->targ_
->savres_section()->data_size();
4451 off
= align_address(off
, this->stub_align());
4452 // Include original section size and alignment padding in size
4453 my_size
+= off
- start_off
;
4454 // Ensure new size is always larger than min size
4455 // threshold. Alignment requirement is included in "my_size", so
4456 // increase "my_size" does not invalidate alignment.
4457 if (my_size
< this->min_size_threshold_
)
4458 my_size
= this->min_size_threshold_
;
4459 this->reset_address_and_file_offset();
4460 this->set_current_data_size(my_size
);
4461 this->set_address_and_file_offset(os
->address() + start_off
,
4462 os
->offset() + start_off
);
4467 stub_address() const
4469 return align_address(this->address() + this->orig_data_size_
,
4470 this->stub_align());
4476 return align_address(this->offset() + this->orig_data_size_
,
4477 this->stub_align());
4482 { return this->plt_size_
; }
4485 set_min_size_threshold(Address min_size
)
4486 { this->min_size_threshold_
= min_size
; }
4489 define_stub_syms(Symbol_table
*);
4494 Output_section
* os
= this->output_section();
4495 if (os
->addralign() < this->stub_align())
4497 os
->set_addralign(this->stub_align());
4498 // FIXME: get rid of the insane checkpointing.
4499 // We can't increase alignment of the input section to which
4500 // stubs are attached; The input section may be .init which
4501 // is pasted together with other .init sections to form a
4502 // function. Aligning might insert zero padding resulting in
4503 // sigill. However we do need to increase alignment of the
4504 // output section so that the align_address() on offset in
4505 // set_address_and_size() adds the same padding as the
4506 // align_address() on address in stub_address().
4507 // What's more, we need this alignment for the layout done in
4508 // relaxation_loop_body() so that the output section starts at
4509 // a suitably aligned address.
4510 os
->checkpoint_set_addralign(this->stub_align());
4512 if (this->last_plt_size_
!= this->plt_size_
4513 || this->last_branch_size_
!= this->branch_size_
)
4515 this->last_plt_size_
= this->plt_size_
;
4516 this->last_branch_size_
= this->branch_size_
;
4522 // Generate a suitable FDE to describe code in this stub group.
4526 // Add .eh_frame info for this stub section.
4528 add_eh_frame(Layout
* layout
);
4530 // Remove .eh_frame info for this stub section.
4532 remove_eh_frame(Layout
* layout
);
4534 Target_powerpc
<size
, big_endian
>*
4540 class Plt_stub_key_hash
;
4541 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4542 Plt_stub_key_hash
> Plt_stub_entries
;
4543 class Branch_stub_ent
;
4544 class Branch_stub_ent_hash
;
4545 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4546 Branch_stub_ent_hash
> Branch_stub_entries
;
4548 // Alignment of stub section.
4552 unsigned int min_align
= size
== 64 ? 32 : 16;
4553 unsigned int user_align
= 1 << parameters
->options().plt_align();
4554 return std::max(user_align
, min_align
);
4557 // Return the plt offset for the given call stub.
4559 plt_off(typename
Plt_stub_entries::const_iterator p
,
4560 const Output_data_plt_powerpc
<size
, big_endian
>** sec
) const
4562 const Symbol
* gsym
= p
->first
.sym_
;
4564 return this->targ_
->plt_off(gsym
, sec
);
4567 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4568 unsigned int local_sym_index
= p
->first
.locsym_
;
4569 return this->targ_
->plt_off(relobj
, local_sym_index
, sec
);
4573 // Size of a given plt call stub.
4575 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4579 const Symbol
* gsym
= p
->first
.sym_
;
4581 + (this->targ_
->is_tls_get_addr_opt(gsym
) ? 8 * 4 : 0));
4584 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
4585 Address plt_addr
= this->plt_off(p
, &plt
);
4586 plt_addr
+= plt
->address();
4587 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4588 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4589 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4590 got_addr
+= ppcobj
->toc_base_offset();
4591 Address off
= plt_addr
- got_addr
;
4592 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4593 const Symbol
* gsym
= p
->first
.sym_
;
4594 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4596 if (this->targ_
->abiversion() < 2)
4598 bool static_chain
= parameters
->options().plt_static_chain();
4599 bool thread_safe
= this->targ_
->plt_thread_safe();
4603 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4609 plt_call_align(unsigned int bytes
) const
4611 unsigned int align
= param_plt_align
<size
>();
4612 return (bytes
+ align
- 1) & -align
;
4615 // Return long branch stub size.
4617 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4619 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4620 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4622 unsigned int bytes
= 16;
4623 if (size
== 32 && parameters
->options().output_is_position_independent())
4630 do_write(Output_file
*);
4632 // Plt call stub keys.
4636 Plt_stub_key(const Symbol
* sym
)
4637 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4640 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4641 unsigned int locsym_index
)
4642 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4645 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4647 unsigned int r_type
,
4649 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4652 this->addend_
= addend
;
4653 else if (parameters
->options().output_is_position_independent()
4654 && r_type
== elfcpp::R_PPC_PLTREL24
)
4656 this->addend_
= addend
;
4657 if (this->addend_
>= 32768)
4658 this->object_
= object
;
4662 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4663 unsigned int locsym_index
,
4664 unsigned int r_type
,
4666 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4669 this->addend_
= addend
;
4670 else if (parameters
->options().output_is_position_independent()
4671 && r_type
== elfcpp::R_PPC_PLTREL24
)
4672 this->addend_
= addend
;
4675 bool operator==(const Plt_stub_key
& that
) const
4677 return (this->sym_
== that
.sym_
4678 && this->object_
== that
.object_
4679 && this->addend_
== that
.addend_
4680 && this->locsym_
== that
.locsym_
);
4684 const Sized_relobj_file
<size
, big_endian
>* object_
;
4685 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4686 unsigned int locsym_
;
4689 class Plt_stub_key_hash
4692 size_t operator()(const Plt_stub_key
& ent
) const
4694 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4695 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4701 // Long branch stub keys.
4702 class Branch_stub_ent
4705 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4706 Address to
, bool save_res
)
4707 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4710 toc_base_off_
= obj
->toc_base_offset();
4713 bool operator==(const Branch_stub_ent
& that
) const
4715 return (this->dest_
== that
.dest_
4717 || this->toc_base_off_
== that
.toc_base_off_
));
4721 unsigned int toc_base_off_
;
4725 class Branch_stub_ent_hash
4728 size_t operator()(const Branch_stub_ent
& ent
) const
4729 { return ent
.dest_
^ ent
.toc_base_off_
; }
4732 // In a sane world this would be a global.
4733 Target_powerpc
<size
, big_endian
>* targ_
;
4734 // Map sym/object/addend to stub offset.
4735 Plt_stub_entries plt_call_stubs_
;
4736 // Map destination address to stub offset.
4737 Branch_stub_entries long_branch_stubs_
;
4738 // size of input section
4739 section_size_type orig_data_size_
;
4741 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4742 // Some rare cases cause (PR/20529) fluctuation in stub table
4743 // size, which leads to an endless relax loop. This is to be fixed
4744 // by, after the first few iterations, allowing only increase of
4745 // stub table size. This variable sets the minimal possible size of
4746 // a stub table, it is zero for the first few iterations, then
4747 // increases monotonically.
4748 Address min_size_threshold_
;
4749 // Set if this stub group needs a copy of out-of-line register
4750 // save/restore functions.
4751 bool need_save_res_
;
4752 // Per stub table unique identifier.
4754 // The bctrl in the __tls_get_addr_opt stub, if present.
4755 unsigned int tls_get_addr_opt_bctrl_
;
4756 // FDE unwind info for this stub group.
4757 unsigned int plt_fde_len_
;
4758 unsigned char plt_fde_
[20];
4761 // Add a plt call stub, if we do not already have one for this
4762 // sym/object/addend combo.
4764 template<int size
, bool big_endian
>
4766 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4768 const Sized_relobj_file
<size
, big_endian
>* object
,
4770 unsigned int r_type
,
4774 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4775 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4776 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4777 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4780 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4782 && this->targ_
->is_elfv2_localentry0(gsym
))
4784 p
.first
->second
.localentry0_
= 1;
4785 this->targ_
->set_has_localentry0();
4787 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4789 this->targ_
->set_has_tls_get_addr_opt();
4790 this->tls_get_addr_opt_bctrl_
= this->plt_size_
- 5 * 4;
4792 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4796 && !p
.first
->second
.localentry0_
)
4797 p
.first
->second
.r2save_
= 1;
4798 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4801 template<int size
, bool big_endian
>
4803 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4805 const Sized_relobj_file
<size
, big_endian
>* object
,
4806 unsigned int locsym_index
,
4807 unsigned int r_type
,
4811 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4812 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4813 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4814 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4817 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4818 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4820 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4822 p
.first
->second
.localentry0_
= 1;
4823 this->targ_
->set_has_localentry0();
4828 && !p
.first
->second
.localentry0_
)
4829 p
.first
->second
.r2save_
= 1;
4830 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4833 // Find a plt call stub.
4835 template<int size
, bool big_endian
>
4836 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4837 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4838 const Sized_relobj_file
<size
, big_endian
>* object
,
4840 unsigned int r_type
,
4841 Address addend
) const
4843 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4844 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4845 if (p
== this->plt_call_stubs_
.end())
4850 template<int size
, bool big_endian
>
4851 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4852 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4854 Plt_stub_key
key(gsym
);
4855 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4856 if (p
== this->plt_call_stubs_
.end())
4861 template<int size
, bool big_endian
>
4862 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4863 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4864 const Sized_relobj_file
<size
, big_endian
>* object
,
4865 unsigned int locsym_index
,
4866 unsigned int r_type
,
4867 Address addend
) const
4869 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4870 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4871 if (p
== this->plt_call_stubs_
.end())
4876 template<int size
, bool big_endian
>
4877 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4878 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4879 const Sized_relobj_file
<size
, big_endian
>* object
,
4880 unsigned int locsym_index
) const
4882 Plt_stub_key
key(object
, locsym_index
);
4883 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4884 if (p
== this->plt_call_stubs_
.end())
4889 // Add a long branch stub if we don't already have one to given
4892 template<int size
, bool big_endian
>
4894 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4895 const Powerpc_relobj
<size
, big_endian
>* object
,
4896 unsigned int r_type
,
4901 Branch_stub_ent
ent(object
, to
, save_res
);
4902 Address off
= this->branch_size_
;
4903 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
4904 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
4908 this->need_save_res_
= true;
4911 unsigned int stub_size
= this->branch_stub_size(p
.first
);
4912 this->branch_size_
= off
+ stub_size
;
4913 if (size
== 64 && stub_size
!= 4)
4914 this->targ_
->add_branch_lookup_table(to
);
4917 return this->can_reach_stub(from
, off
, r_type
);
4920 // Find long branch stub offset.
4922 template<int size
, bool big_endian
>
4923 typename Stub_table
<size
, big_endian
>::Address
4924 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4925 const Powerpc_relobj
<size
, big_endian
>* object
,
4928 Branch_stub_ent
ent(object
, to
, false);
4929 typename
Branch_stub_entries::const_iterator p
4930 = this->long_branch_stubs_
.find(ent
);
4931 if (p
== this->long_branch_stubs_
.end())
4932 return invalid_address
;
4933 if (p
->first
.save_res_
)
4934 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4938 // Generate a suitable FDE to describe code in this stub group.
4939 // The __tls_get_addr_opt call stub needs to describe where it saves
4940 // LR, to support exceptions that might be thrown from __tls_get_addr.
4942 template<int size
, bool big_endian
>
4944 Stub_table
<size
, big_endian
>::init_plt_fde()
4946 unsigned char* p
= this->plt_fde_
;
4947 // offset pcrel sdata4, size udata4, and augmentation size byte.
4950 if (this->tls_get_addr_opt_bctrl_
!= -1u)
4952 unsigned int to_bctrl
= this->tls_get_addr_opt_bctrl_
/ 4;
4954 *p
++ = elfcpp::DW_CFA_advance_loc
+ to_bctrl
;
4955 else if (to_bctrl
< 256)
4957 *p
++ = elfcpp::DW_CFA_advance_loc1
;
4960 else if (to_bctrl
< 65536)
4962 *p
++ = elfcpp::DW_CFA_advance_loc2
;
4963 elfcpp::Swap
<16, big_endian
>::writeval(p
, to_bctrl
);
4968 *p
++ = elfcpp::DW_CFA_advance_loc4
;
4969 elfcpp::Swap
<32, big_endian
>::writeval(p
, to_bctrl
);
4972 *p
++ = elfcpp::DW_CFA_offset_extended_sf
;
4974 *p
++ = -(this->targ_
->stk_linker() / 8) & 0x7f;
4975 *p
++ = elfcpp::DW_CFA_advance_loc
+ 4;
4976 *p
++ = elfcpp::DW_CFA_restore_extended
;
4979 this->plt_fde_len_
= p
- this->plt_fde_
;
4982 // Add .eh_frame info for this stub section. Unlike other linker
4983 // generated .eh_frame this is added late in the link, because we
4984 // only want the .eh_frame info if this particular stub section is
4987 template<int size
, bool big_endian
>
4989 Stub_table
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4991 if (!parameters
->options().ld_generated_unwind_info())
4994 // Since we add stub .eh_frame info late, it must be placed
4995 // after all other linker generated .eh_frame info so that
4996 // merge mapping need not be updated for input sections.
4997 // There is no provision to use a different CIE to that used
4999 if (!this->targ_
->has_glink())
5002 if (this->plt_size_
+ this->branch_size_
+ this->need_save_res_
== 0)
5005 this->init_plt_fde();
5006 layout
->add_eh_frame_for_plt(this,
5007 Eh_cie
<size
>::eh_frame_cie
,
5008 sizeof (Eh_cie
<size
>::eh_frame_cie
),
5009 this->plt_fde_
, this->plt_fde_len_
);
5012 template<int size
, bool big_endian
>
5014 Stub_table
<size
, big_endian
>::remove_eh_frame(Layout
* layout
)
5016 if (this->plt_fde_len_
!= 0)
5018 layout
->remove_eh_frame_for_plt(this,
5019 Eh_cie
<size
>::eh_frame_cie
,
5020 sizeof (Eh_cie
<size
>::eh_frame_cie
),
5021 this->plt_fde_
, this->plt_fde_len_
);
5022 this->plt_fde_len_
= 0;
5026 // A class to handle .glink.
5028 template<int size
, bool big_endian
>
5029 class Output_data_glink
: public Output_section_data
5032 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5033 static const Address invalid_address
= static_cast<Address
>(0) - 1;
5035 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
5036 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
5037 end_branch_table_(), ge_size_(0)
5041 add_eh_frame(Layout
* layout
);
5044 add_global_entry(const Symbol
*);
5047 find_global_entry(const Symbol
*) const;
5050 global_entry_align(unsigned int off
) const
5052 unsigned int align
= param_plt_align
<size
>();
5053 return (off
+ align
- 1) & -align
;
5057 global_entry_off() const
5059 return this->global_entry_align(this->end_branch_table_
);
5063 global_entry_address() const
5065 gold_assert(this->is_data_size_valid());
5066 return this->address() + this->global_entry_off();
5070 pltresolve_size() const
5074 + (this->targ_
->abiversion() < 2 ? 11 * 4 : 14 * 4));
5079 // Write to a map file.
5081 do_print_to_mapfile(Mapfile
* mapfile
) const
5082 { mapfile
->print_output_data(this, _("** glink")); }
5086 set_final_data_size();
5090 do_write(Output_file
*);
5092 // Allows access to .got and .plt for do_write.
5093 Target_powerpc
<size
, big_endian
>* targ_
;
5095 // Map sym to stub offset.
5096 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
5097 Global_entry_stub_entries global_entry_stubs_
;
5099 unsigned int end_branch_table_
, ge_size_
;
5102 template<int size
, bool big_endian
>
5104 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
5106 if (!parameters
->options().ld_generated_unwind_info())
5111 if (this->targ_
->abiversion() < 2)
5112 layout
->add_eh_frame_for_plt(this,
5113 Eh_cie
<64>::eh_frame_cie
,
5114 sizeof (Eh_cie
<64>::eh_frame_cie
),
5115 glink_eh_frame_fde_64v1
,
5116 sizeof (glink_eh_frame_fde_64v1
));
5118 layout
->add_eh_frame_for_plt(this,
5119 Eh_cie
<64>::eh_frame_cie
,
5120 sizeof (Eh_cie
<64>::eh_frame_cie
),
5121 glink_eh_frame_fde_64v2
,
5122 sizeof (glink_eh_frame_fde_64v2
));
5126 // 32-bit .glink can use the default since the CIE return
5127 // address reg, LR, is valid.
5128 layout
->add_eh_frame_for_plt(this,
5129 Eh_cie
<32>::eh_frame_cie
,
5130 sizeof (Eh_cie
<32>::eh_frame_cie
),
5132 sizeof (default_fde
));
5133 // Except where LR is used in a PIC __glink_PLTresolve.
5134 if (parameters
->options().output_is_position_independent())
5135 layout
->add_eh_frame_for_plt(this,
5136 Eh_cie
<32>::eh_frame_cie
,
5137 sizeof (Eh_cie
<32>::eh_frame_cie
),
5138 glink_eh_frame_fde_32
,
5139 sizeof (glink_eh_frame_fde_32
));
5143 template<int size
, bool big_endian
>
5145 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
5147 unsigned int off
= this->global_entry_align(this->ge_size_
);
5148 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
5149 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, off
));
5151 this->ge_size_
= off
+ 16;
5154 template<int size
, bool big_endian
>
5155 typename Output_data_glink
<size
, big_endian
>::Address
5156 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
5158 typename
Global_entry_stub_entries::const_iterator p
5159 = this->global_entry_stubs_
.find(gsym
);
5160 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
5163 template<int size
, bool big_endian
>
5165 Output_data_glink
<size
, big_endian
>::set_final_data_size()
5167 unsigned int count
= this->targ_
->plt_entry_count();
5168 section_size_type total
= 0;
5174 // space for branch table
5175 total
+= 4 * (count
- 1);
5177 total
+= -total
& 15;
5178 total
+= this->pltresolve_size();
5182 total
+= this->pltresolve_size();
5184 // space for branch table
5186 if (this->targ_
->abiversion() < 2)
5190 total
+= 4 * (count
- 0x8000);
5194 this->end_branch_table_
= total
;
5195 total
= this->global_entry_align(total
);
5196 total
+= this->ge_size_
;
5198 this->set_data_size(total
);
5201 // Define symbols on stubs, identifying the stub.
5203 template<int size
, bool big_endian
>
5205 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
5207 if (!this->plt_call_stubs_
.empty())
5209 // The key for the plt call stub hash table includes addresses,
5210 // therefore traversal order depends on those addresses, which
5211 // can change between runs if gold is a PIE. Unfortunately the
5212 // output .symtab ordering depends on the order in which symbols
5213 // are added to the linker symtab. We want reproducible output
5214 // so must sort the call stub symbols.
5215 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
5216 std::vector
<plt_iter
> sorted
;
5217 sorted
.resize(this->plt_call_stubs_
.size());
5219 for (plt_iter cs
= this->plt_call_stubs_
.begin();
5220 cs
!= this->plt_call_stubs_
.end();
5222 sorted
[cs
->second
.indx_
] = cs
;
5224 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
5226 plt_iter cs
= sorted
[i
];
5229 if (cs
->first
.addend_
!= 0)
5230 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
5233 if (cs
->first
.object_
)
5235 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5236 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5237 sprintf(obj
, "%x:", ppcobj
->uniq());
5240 const char *symname
;
5241 if (cs
->first
.sym_
== NULL
)
5243 sprintf(localname
, "%x", cs
->first
.locsym_
);
5244 symname
= localname
;
5246 else if (this->targ_
->is_tls_get_addr_opt(cs
->first
.sym_
))
5247 symname
= this->targ_
->tls_get_addr_opt()->name();
5249 symname
= cs
->first
.sym_
->name();
5250 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
5251 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
5253 = this->stub_address() - this->address() + cs
->second
.off_
;
5254 unsigned int stub_size
= this->plt_call_align(this->plt_call_size(cs
));
5255 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5259 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
5260 for (branch_iter bs
= this->long_branch_stubs_
.begin();
5261 bs
!= this->long_branch_stubs_
.end();
5264 if (bs
->first
.save_res_
)
5267 char* name
= new char[8 + 13 + 16 + 1];
5268 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
5269 static_cast<unsigned long long>(bs
->first
.dest_
));
5270 Address value
= (this->stub_address() - this->address()
5271 + this->plt_size_
+ bs
->second
);
5272 unsigned int stub_size
= this->branch_stub_size(bs
);
5273 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5277 // Write out plt and long branch stub code.
5279 template<int size
, bool big_endian
>
5281 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
5283 if (this->plt_call_stubs_
.empty()
5284 && this->long_branch_stubs_
.empty())
5287 const section_size_type start_off
= this->offset();
5288 const section_size_type off
= this->stub_offset();
5289 const section_size_type oview_size
=
5290 convert_to_section_size_type(this->data_size() - (off
- start_off
));
5291 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5296 const Output_data_got_powerpc
<size
, big_endian
>* got
5297 = this->targ_
->got_section();
5298 Address got_os_addr
= got
->output_section()->address();
5300 if (!this->plt_call_stubs_
.empty())
5302 // Write out plt call stubs.
5303 typename
Plt_stub_entries::const_iterator cs
;
5304 for (cs
= this->plt_call_stubs_
.begin();
5305 cs
!= this->plt_call_stubs_
.end();
5308 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
5309 Address pltoff
= this->plt_off(cs
, &plt
);
5310 Address plt_addr
= pltoff
+ plt
->address();
5311 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5312 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5313 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
5314 Address off
= plt_addr
- got_addr
;
5316 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
5317 gold_error(_("%s: linkage table error against `%s'"),
5318 cs
->first
.object_
->name().c_str(),
5319 cs
->first
.sym_
->demangled_name().c_str());
5321 bool plt_load_toc
= this->targ_
->abiversion() < 2;
5323 = plt_load_toc
&& parameters
->options().plt_static_chain();
5325 = plt_load_toc
&& this->targ_
->plt_thread_safe();
5326 bool use_fake_dep
= false;
5327 Address cmp_branch_off
= 0;
5330 unsigned int pltindex
5331 = ((pltoff
- this->targ_
->first_plt_entry_offset())
5332 / this->targ_
->plt_entry_size());
5334 = (this->targ_
->glink_section()->pltresolve_size()
5336 if (pltindex
> 32768)
5337 glinkoff
+= (pltindex
- 32768) * 4;
5339 = this->targ_
->glink_section()->address() + glinkoff
;
5341 = (this->stub_address() + cs
->second
.off_
+ 20
5342 + 4 * cs
->second
.r2save_
5343 + 4 * (ha(off
) != 0)
5344 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5345 + 4 * static_chain
);
5346 cmp_branch_off
= to
- from
;
5347 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
5350 p
= oview
+ cs
->second
.off_
;
5351 const Symbol
* gsym
= cs
->first
.sym_
;
5352 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5354 write_insn
<big_endian
>(p
, ld_11_3
+ 0);
5356 write_insn
<big_endian
>(p
, ld_12_3
+ 8);
5358 write_insn
<big_endian
>(p
, mr_0_3
);
5360 write_insn
<big_endian
>(p
, cmpdi_11_0
);
5362 write_insn
<big_endian
>(p
, add_3_12_13
);
5364 write_insn
<big_endian
>(p
, beqlr
);
5366 write_insn
<big_endian
>(p
, mr_3_0
);
5368 if (!cs
->second
.localentry0_
)
5370 write_insn
<big_endian
>(p
, mflr_11
);
5372 write_insn
<big_endian
>(p
, (std_11_1
5373 + this->targ_
->stk_linker()));
5376 use_fake_dep
= thread_safe
;
5380 if (cs
->second
.r2save_
)
5382 write_insn
<big_endian
>(p
,
5383 std_2_1
+ this->targ_
->stk_toc());
5388 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
5390 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
5395 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
5397 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
5401 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5403 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
5407 write_insn
<big_endian
>(p
, mtctr_12
);
5413 write_insn
<big_endian
>(p
, xor_2_12_12
);
5415 write_insn
<big_endian
>(p
, add_11_11_2
);
5418 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5422 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5429 if (cs
->second
.r2save_
)
5431 write_insn
<big_endian
>(p
,
5432 std_2_1
+ this->targ_
->stk_toc());
5435 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5438 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5440 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5444 write_insn
<big_endian
>(p
, mtctr_12
);
5450 write_insn
<big_endian
>(p
, xor_11_12_12
);
5452 write_insn
<big_endian
>(p
, add_2_2_11
);
5457 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5460 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5464 if (!cs
->second
.localentry0_
5465 && this->targ_
->is_tls_get_addr_opt(gsym
))
5467 write_insn
<big_endian
>(p
, bctrl
);
5469 write_insn
<big_endian
>(p
, ld_2_1
+ this->targ_
->stk_toc());
5471 write_insn
<big_endian
>(p
, ld_11_1
+ this->targ_
->stk_linker());
5473 write_insn
<big_endian
>(p
, mtlr_11
);
5475 write_insn
<big_endian
>(p
, blr
);
5477 else if (thread_safe
&& !use_fake_dep
)
5479 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5481 write_insn
<big_endian
>(p
, bnectr_p4
);
5483 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5486 write_insn
<big_endian
>(p
, bctr
);
5490 // Write out long branch stubs.
5491 typename
Branch_stub_entries::const_iterator bs
;
5492 for (bs
= this->long_branch_stubs_
.begin();
5493 bs
!= this->long_branch_stubs_
.end();
5496 if (bs
->first
.save_res_
)
5498 p
= oview
+ this->plt_size_
+ bs
->second
;
5499 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5500 Address delta
= bs
->first
.dest_
- loc
;
5501 if (delta
+ (1 << 25) < 2 << 25)
5502 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5506 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5507 gold_assert(brlt_addr
!= invalid_address
);
5508 brlt_addr
+= this->targ_
->brlt_section()->address();
5509 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5510 Address brltoff
= brlt_addr
- got_addr
;
5511 if (ha(brltoff
) == 0)
5513 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5517 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5518 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5520 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5521 write_insn
<big_endian
>(p
, bctr
);
5527 if (!this->plt_call_stubs_
.empty())
5529 // The address of _GLOBAL_OFFSET_TABLE_.
5530 Address g_o_t
= invalid_address
;
5532 // Write out plt call stubs.
5533 typename
Plt_stub_entries::const_iterator cs
;
5534 for (cs
= this->plt_call_stubs_
.begin();
5535 cs
!= this->plt_call_stubs_
.end();
5538 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
5539 Address plt_addr
= this->plt_off(cs
, &plt
);
5540 plt_addr
+= plt
->address();
5542 p
= oview
+ cs
->second
.off_
;
5543 const Symbol
* gsym
= cs
->first
.sym_
;
5544 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5546 write_insn
<big_endian
>(p
, lwz_11_3
+ 0);
5548 write_insn
<big_endian
>(p
, lwz_12_3
+ 4);
5550 write_insn
<big_endian
>(p
, mr_0_3
);
5552 write_insn
<big_endian
>(p
, cmpwi_11_0
);
5554 write_insn
<big_endian
>(p
, add_3_12_2
);
5556 write_insn
<big_endian
>(p
, beqlr
);
5558 write_insn
<big_endian
>(p
, mr_3_0
);
5560 write_insn
<big_endian
>(p
, nop
);
5563 if (parameters
->options().output_is_position_independent())
5566 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5567 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5568 (cs
->first
.object_
));
5569 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5571 unsigned int got2
= ppcobj
->got2_shndx();
5572 got_addr
= ppcobj
->get_output_section_offset(got2
);
5573 gold_assert(got_addr
!= invalid_address
);
5574 got_addr
+= (ppcobj
->output_section(got2
)->address()
5575 + cs
->first
.addend_
);
5579 if (g_o_t
== invalid_address
)
5581 const Output_data_got_powerpc
<size
, big_endian
>* got
5582 = this->targ_
->got_section();
5583 g_o_t
= got
->address() + got
->g_o_t();
5588 Address off
= plt_addr
- got_addr
;
5590 write_insn
<big_endian
>(p
, lwz_11_30
+ l(off
));
5593 write_insn
<big_endian
>(p
, addis_11_30
+ ha(off
));
5595 write_insn
<big_endian
>(p
, lwz_11_11
+ l(off
));
5600 write_insn
<big_endian
>(p
, lis_11
+ ha(plt_addr
));
5602 write_insn
<big_endian
>(p
, lwz_11_11
+ l(plt_addr
));
5605 write_insn
<big_endian
>(p
, mtctr_11
);
5607 write_insn
<big_endian
>(p
, bctr
);
5611 // Write out long branch stubs.
5612 typename
Branch_stub_entries::const_iterator bs
;
5613 for (bs
= this->long_branch_stubs_
.begin();
5614 bs
!= this->long_branch_stubs_
.end();
5617 if (bs
->first
.save_res_
)
5619 p
= oview
+ this->plt_size_
+ bs
->second
;
5620 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5621 Address delta
= bs
->first
.dest_
- loc
;
5622 if (delta
+ (1 << 25) < 2 << 25)
5623 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5624 else if (!parameters
->options().output_is_position_independent())
5626 write_insn
<big_endian
>(p
, lis_12
+ ha(bs
->first
.dest_
));
5628 write_insn
<big_endian
>(p
, addi_12_12
+ l(bs
->first
.dest_
));
5633 write_insn
<big_endian
>(p
, mflr_0
);
5635 write_insn
<big_endian
>(p
, bcl_20_31
);
5637 write_insn
<big_endian
>(p
, mflr_12
);
5639 write_insn
<big_endian
>(p
, addis_12_12
+ ha(delta
));
5641 write_insn
<big_endian
>(p
, addi_12_12
+ l(delta
));
5643 write_insn
<big_endian
>(p
, mtlr_0
);
5646 write_insn
<big_endian
>(p
, mtctr_12
);
5648 write_insn
<big_endian
>(p
, bctr
);
5651 if (this->need_save_res_
)
5653 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5654 memcpy (p
, this->targ_
->savres_section()->contents(),
5655 this->targ_
->savres_section()->data_size());
5659 // Write out .glink.
5661 template<int size
, bool big_endian
>
5663 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5665 const section_size_type off
= this->offset();
5666 const section_size_type oview_size
=
5667 convert_to_section_size_type(this->data_size());
5668 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5671 // The base address of the .plt section.
5672 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5673 Address plt_base
= this->targ_
->plt_section()->address();
5677 if (this->end_branch_table_
!= 0)
5679 // Write pltresolve stub.
5681 Address after_bcl
= this->address() + 16;
5682 Address pltoff
= plt_base
- after_bcl
;
5684 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5686 if (this->targ_
->abiversion() < 2)
5688 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5689 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5690 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5691 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5692 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5693 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5694 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5695 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5696 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5697 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5701 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5702 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5703 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5704 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5705 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5706 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5707 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5708 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5709 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5710 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5711 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5712 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5713 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5715 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5716 gold_assert(p
== oview
+ this->pltresolve_size());
5718 // Write lazy link call stubs.
5720 while (p
< oview
+ this->end_branch_table_
)
5722 if (this->targ_
->abiversion() < 2)
5726 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5730 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5731 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5734 uint32_t branch_off
= 8 - (p
- oview
);
5735 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5740 Address plt_base
= this->targ_
->plt_section()->address();
5741 Address iplt_base
= invalid_address
;
5742 unsigned int global_entry_off
= this->global_entry_off();
5743 Address global_entry_base
= this->address() + global_entry_off
;
5744 typename
Global_entry_stub_entries::const_iterator ge
;
5745 for (ge
= this->global_entry_stubs_
.begin();
5746 ge
!= this->global_entry_stubs_
.end();
5749 p
= oview
+ global_entry_off
+ ge
->second
;
5750 Address plt_addr
= ge
->first
->plt_offset();
5751 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5752 && ge
->first
->can_use_relative_reloc(false))
5754 if (iplt_base
== invalid_address
)
5755 iplt_base
= this->targ_
->iplt_section()->address();
5756 plt_addr
+= iplt_base
;
5759 plt_addr
+= plt_base
;
5760 Address my_addr
= global_entry_base
+ ge
->second
;
5761 Address off
= plt_addr
- my_addr
;
5763 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5764 gold_error(_("%s: linkage table error against `%s'"),
5765 ge
->first
->object()->name().c_str(),
5766 ge
->first
->demangled_name().c_str());
5768 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5769 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5770 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5771 write_insn
<big_endian
>(p
, bctr
);
5776 const Output_data_got_powerpc
<size
, big_endian
>* got
5777 = this->targ_
->got_section();
5778 // The address of _GLOBAL_OFFSET_TABLE_.
5779 Address g_o_t
= got
->address() + got
->g_o_t();
5781 // Write out pltresolve branch table.
5783 unsigned int the_end
= oview_size
- this->pltresolve_size();
5784 unsigned char* end_p
= oview
+ the_end
;
5785 while (p
< end_p
- 8 * 4)
5786 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5788 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5790 // Write out pltresolve call stub.
5791 end_p
= oview
+ oview_size
;
5792 if (parameters
->options().output_is_position_independent())
5794 Address res0_off
= 0;
5795 Address after_bcl_off
= the_end
+ 12;
5796 Address bcl_res0
= after_bcl_off
- res0_off
;
5798 write_insn
<big_endian
>(p
, addis_11_11
+ ha(bcl_res0
));
5800 write_insn
<big_endian
>(p
, mflr_0
);
5802 write_insn
<big_endian
>(p
, bcl_20_31
);
5804 write_insn
<big_endian
>(p
, addi_11_11
+ l(bcl_res0
));
5806 write_insn
<big_endian
>(p
, mflr_12
);
5808 write_insn
<big_endian
>(p
, mtlr_0
);
5810 write_insn
<big_endian
>(p
, sub_11_11_12
);
5813 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5815 write_insn
<big_endian
>(p
, addis_12_12
+ ha(got_bcl
));
5817 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5819 write_insn
<big_endian
>(p
, lwz_0_12
+ l(got_bcl
));
5821 write_insn
<big_endian
>(p
, lwz_12_12
+ l(got_bcl
+ 4));
5825 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(got_bcl
));
5827 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5830 write_insn
<big_endian
>(p
, mtctr_0
);
5832 write_insn
<big_endian
>(p
, add_0_11_11
);
5834 write_insn
<big_endian
>(p
, add_11_0_11
);
5838 Address res0
= this->address();
5840 write_insn
<big_endian
>(p
, lis_12
+ ha(g_o_t
+ 4));
5842 write_insn
<big_endian
>(p
, addis_11_11
+ ha(-res0
));
5844 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5845 write_insn
<big_endian
>(p
, lwz_0_12
+ l(g_o_t
+ 4));
5847 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(g_o_t
+ 4));
5849 write_insn
<big_endian
>(p
, addi_11_11
+ l(-res0
));
5851 write_insn
<big_endian
>(p
, mtctr_0
);
5853 write_insn
<big_endian
>(p
, add_0_11_11
);
5855 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5856 write_insn
<big_endian
>(p
, lwz_12_12
+ l(g_o_t
+ 8));
5858 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5860 write_insn
<big_endian
>(p
, add_11_0_11
);
5863 write_insn
<big_endian
>(p
, bctr
);
5867 write_insn
<big_endian
>(p
, nop
);
5872 of
->write_output_view(off
, oview_size
, oview
);
5876 // A class to handle linker generated save/restore functions.
5878 template<int size
, bool big_endian
>
5879 class Output_data_save_res
: public Output_section_data_build
5882 Output_data_save_res(Symbol_table
* symtab
);
5884 const unsigned char*
5891 // Write to a map file.
5893 do_print_to_mapfile(Mapfile
* mapfile
) const
5894 { mapfile
->print_output_data(this, _("** save/restore")); }
5897 do_write(Output_file
*);
5900 // The maximum size of save/restore contents.
5901 static const unsigned int savres_max
= 218*4;
5904 savres_define(Symbol_table
* symtab
,
5906 unsigned int lo
, unsigned int hi
,
5907 unsigned char* write_ent(unsigned char*, int),
5908 unsigned char* write_tail(unsigned char*, int));
5910 unsigned char *contents_
;
5913 template<bool big_endian
>
5914 static unsigned char*
5915 savegpr0(unsigned char* p
, int r
)
5917 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5918 write_insn
<big_endian
>(p
, insn
);
5922 template<bool big_endian
>
5923 static unsigned char*
5924 savegpr0_tail(unsigned char* p
, int r
)
5926 p
= savegpr0
<big_endian
>(p
, r
);
5927 uint32_t insn
= std_0_1
+ 16;
5928 write_insn
<big_endian
>(p
, insn
);
5930 write_insn
<big_endian
>(p
, blr
);
5934 template<bool big_endian
>
5935 static unsigned char*
5936 restgpr0(unsigned char* p
, int r
)
5938 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5939 write_insn
<big_endian
>(p
, insn
);
5943 template<bool big_endian
>
5944 static unsigned char*
5945 restgpr0_tail(unsigned char* p
, int r
)
5947 uint32_t insn
= ld_0_1
+ 16;
5948 write_insn
<big_endian
>(p
, insn
);
5950 p
= restgpr0
<big_endian
>(p
, r
);
5951 write_insn
<big_endian
>(p
, mtlr_0
);
5955 p
= restgpr0
<big_endian
>(p
, 30);
5956 p
= restgpr0
<big_endian
>(p
, 31);
5958 write_insn
<big_endian
>(p
, blr
);
5962 template<bool big_endian
>
5963 static unsigned char*
5964 savegpr1(unsigned char* p
, int r
)
5966 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5967 write_insn
<big_endian
>(p
, insn
);
5971 template<bool big_endian
>
5972 static unsigned char*
5973 savegpr1_tail(unsigned char* p
, int r
)
5975 p
= savegpr1
<big_endian
>(p
, r
);
5976 write_insn
<big_endian
>(p
, blr
);
5980 template<bool big_endian
>
5981 static unsigned char*
5982 restgpr1(unsigned char* p
, int r
)
5984 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5985 write_insn
<big_endian
>(p
, insn
);
5989 template<bool big_endian
>
5990 static unsigned char*
5991 restgpr1_tail(unsigned char* p
, int r
)
5993 p
= restgpr1
<big_endian
>(p
, r
);
5994 write_insn
<big_endian
>(p
, blr
);
5998 template<bool big_endian
>
5999 static unsigned char*
6000 savefpr(unsigned char* p
, int r
)
6002 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6003 write_insn
<big_endian
>(p
, insn
);
6007 template<bool big_endian
>
6008 static unsigned char*
6009 savefpr0_tail(unsigned char* p
, int r
)
6011 p
= savefpr
<big_endian
>(p
, r
);
6012 write_insn
<big_endian
>(p
, std_0_1
+ 16);
6014 write_insn
<big_endian
>(p
, blr
);
6018 template<bool big_endian
>
6019 static unsigned char*
6020 restfpr(unsigned char* p
, int r
)
6022 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
6023 write_insn
<big_endian
>(p
, insn
);
6027 template<bool big_endian
>
6028 static unsigned char*
6029 restfpr0_tail(unsigned char* p
, int r
)
6031 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
6033 p
= restfpr
<big_endian
>(p
, r
);
6034 write_insn
<big_endian
>(p
, mtlr_0
);
6038 p
= restfpr
<big_endian
>(p
, 30);
6039 p
= restfpr
<big_endian
>(p
, 31);
6041 write_insn
<big_endian
>(p
, blr
);
6045 template<bool big_endian
>
6046 static unsigned char*
6047 savefpr1_tail(unsigned char* p
, int r
)
6049 p
= savefpr
<big_endian
>(p
, r
);
6050 write_insn
<big_endian
>(p
, blr
);
6054 template<bool big_endian
>
6055 static unsigned char*
6056 restfpr1_tail(unsigned char* p
, int r
)
6058 p
= restfpr
<big_endian
>(p
, r
);
6059 write_insn
<big_endian
>(p
, blr
);
6063 template<bool big_endian
>
6064 static unsigned char*
6065 savevr(unsigned char* p
, int r
)
6067 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
6068 write_insn
<big_endian
>(p
, insn
);
6070 insn
= stvx_0_12_0
+ (r
<< 21);
6071 write_insn
<big_endian
>(p
, insn
);
6075 template<bool big_endian
>
6076 static unsigned char*
6077 savevr_tail(unsigned char* p
, int r
)
6079 p
= savevr
<big_endian
>(p
, r
);
6080 write_insn
<big_endian
>(p
, blr
);
6084 template<bool big_endian
>
6085 static unsigned char*
6086 restvr(unsigned char* p
, int r
)
6088 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
6089 write_insn
<big_endian
>(p
, insn
);
6091 insn
= lvx_0_12_0
+ (r
<< 21);
6092 write_insn
<big_endian
>(p
, insn
);
6096 template<bool big_endian
>
6097 static unsigned char*
6098 restvr_tail(unsigned char* p
, int r
)
6100 p
= restvr
<big_endian
>(p
, r
);
6101 write_insn
<big_endian
>(p
, blr
);
6106 template<int size
, bool big_endian
>
6107 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
6108 Symbol_table
* symtab
)
6109 : Output_section_data_build(4),
6112 this->savres_define(symtab
,
6113 "_savegpr0_", 14, 31,
6114 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
6115 this->savres_define(symtab
,
6116 "_restgpr0_", 14, 29,
6117 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6118 this->savres_define(symtab
,
6119 "_restgpr0_", 30, 31,
6120 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6121 this->savres_define(symtab
,
6122 "_savegpr1_", 14, 31,
6123 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
6124 this->savres_define(symtab
,
6125 "_restgpr1_", 14, 31,
6126 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
6127 this->savres_define(symtab
,
6128 "_savefpr_", 14, 31,
6129 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
6130 this->savres_define(symtab
,
6131 "_restfpr_", 14, 29,
6132 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6133 this->savres_define(symtab
,
6134 "_restfpr_", 30, 31,
6135 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6136 this->savres_define(symtab
,
6138 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
6139 this->savres_define(symtab
,
6141 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
6142 this->savres_define(symtab
,
6144 savevr
<big_endian
>, savevr_tail
<big_endian
>);
6145 this->savres_define(symtab
,
6147 restvr
<big_endian
>, restvr_tail
<big_endian
>);
6150 template<int size
, bool big_endian
>
6152 Output_data_save_res
<size
, big_endian
>::savres_define(
6153 Symbol_table
* symtab
,
6155 unsigned int lo
, unsigned int hi
,
6156 unsigned char* write_ent(unsigned char*, int),
6157 unsigned char* write_tail(unsigned char*, int))
6159 size_t len
= strlen(name
);
6160 bool writing
= false;
6163 memcpy(sym
, name
, len
);
6166 for (unsigned int i
= lo
; i
<= hi
; i
++)
6168 sym
[len
+ 0] = i
/ 10 + '0';
6169 sym
[len
+ 1] = i
% 10 + '0';
6170 Symbol
* gsym
= symtab
->lookup(sym
);
6171 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
6172 writing
= writing
|| refd
;
6175 if (this->contents_
== NULL
)
6176 this->contents_
= new unsigned char[this->savres_max
];
6178 section_size_type value
= this->current_data_size();
6179 unsigned char* p
= this->contents_
+ value
;
6181 p
= write_ent(p
, i
);
6183 p
= write_tail(p
, i
);
6184 section_size_type cur_size
= p
- this->contents_
;
6185 this->set_current_data_size(cur_size
);
6187 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
6188 this, value
, cur_size
- value
,
6189 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
6190 elfcpp::STV_HIDDEN
, 0, false, false);
6195 // Write out save/restore.
6197 template<int size
, bool big_endian
>
6199 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
6201 const section_size_type off
= this->offset();
6202 const section_size_type oview_size
=
6203 convert_to_section_size_type(this->data_size());
6204 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
6205 memcpy(oview
, this->contents_
, oview_size
);
6206 of
->write_output_view(off
, oview_size
, oview
);
6210 // Create the glink section.
6212 template<int size
, bool big_endian
>
6214 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
6216 if (this->glink_
== NULL
)
6218 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
6219 this->glink_
->add_eh_frame(layout
);
6220 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6221 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6222 this->glink_
, ORDER_TEXT
, false);
6226 // Create a PLT entry for a global symbol.
6228 template<int size
, bool big_endian
>
6230 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
6234 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
6235 && gsym
->can_use_relative_reloc(false))
6237 if (this->iplt_
== NULL
)
6238 this->make_iplt_section(symtab
, layout
);
6239 this->iplt_
->add_ifunc_entry(gsym
);
6243 if (this->plt_
== NULL
)
6244 this->make_plt_section(symtab
, layout
);
6245 this->plt_
->add_entry(gsym
);
6249 // Make a PLT entry for a local symbol.
6251 template<int size
, bool big_endian
>
6253 Target_powerpc
<size
, big_endian
>::make_local_plt_entry(
6255 Sized_relobj_file
<size
, big_endian
>* relobj
,
6258 if (this->lplt_
== NULL
)
6259 this->make_lplt_section(layout
);
6260 this->lplt_
->add_local_entry(relobj
, r_sym
);
6263 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
6265 template<int size
, bool big_endian
>
6267 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
6268 Symbol_table
* symtab
,
6270 Sized_relobj_file
<size
, big_endian
>* relobj
,
6273 if (this->iplt_
== NULL
)
6274 this->make_iplt_section(symtab
, layout
);
6275 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
6278 // Return the number of entries in the PLT.
6280 template<int size
, bool big_endian
>
6282 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
6284 if (this->plt_
== NULL
)
6286 return this->plt_
->entry_count();
6289 // Create a GOT entry for local dynamic __tls_get_addr calls.
6291 template<int size
, bool big_endian
>
6293 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
6294 Symbol_table
* symtab
,
6296 Sized_relobj_file
<size
, big_endian
>* object
)
6298 if (this->tlsld_got_offset_
== -1U)
6300 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
6301 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
6302 Output_data_got_powerpc
<size
, big_endian
>* got
6303 = this->got_section(symtab
, layout
);
6304 unsigned int got_offset
= got
->add_constant_pair(0, 0);
6305 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
6307 this->tlsld_got_offset_
= got_offset
;
6309 return this->tlsld_got_offset_
;
6312 // Get the Reference_flags for a particular relocation.
6314 template<int size
, bool big_endian
>
6316 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
6317 unsigned int r_type
,
6318 const Target_powerpc
* target
)
6324 case elfcpp::R_POWERPC_NONE
:
6325 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6326 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6327 case elfcpp::R_PPC64_TOC
:
6328 // No symbol reference.
6331 case elfcpp::R_PPC64_ADDR64
:
6332 case elfcpp::R_PPC64_UADDR64
:
6333 case elfcpp::R_POWERPC_ADDR32
:
6334 case elfcpp::R_POWERPC_UADDR32
:
6335 case elfcpp::R_POWERPC_ADDR16
:
6336 case elfcpp::R_POWERPC_UADDR16
:
6337 case elfcpp::R_POWERPC_ADDR16_LO
:
6338 case elfcpp::R_POWERPC_ADDR16_HI
:
6339 case elfcpp::R_POWERPC_ADDR16_HA
:
6340 ref
= Symbol::ABSOLUTE_REF
;
6343 case elfcpp::R_POWERPC_ADDR24
:
6344 case elfcpp::R_POWERPC_ADDR14
:
6345 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6346 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6347 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
6350 case elfcpp::R_PPC64_REL64
:
6351 case elfcpp::R_POWERPC_REL32
:
6352 case elfcpp::R_PPC_LOCAL24PC
:
6353 case elfcpp::R_POWERPC_REL16
:
6354 case elfcpp::R_POWERPC_REL16_LO
:
6355 case elfcpp::R_POWERPC_REL16_HI
:
6356 case elfcpp::R_POWERPC_REL16_HA
:
6357 ref
= Symbol::RELATIVE_REF
;
6360 case elfcpp::R_POWERPC_REL24
:
6361 case elfcpp::R_PPC_PLTREL24
:
6362 case elfcpp::R_POWERPC_REL14
:
6363 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6364 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6365 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
6368 case elfcpp::R_POWERPC_GOT16
:
6369 case elfcpp::R_POWERPC_GOT16_LO
:
6370 case elfcpp::R_POWERPC_GOT16_HI
:
6371 case elfcpp::R_POWERPC_GOT16_HA
:
6372 case elfcpp::R_PPC64_GOT16_DS
:
6373 case elfcpp::R_PPC64_GOT16_LO_DS
:
6374 case elfcpp::R_PPC64_TOC16
:
6375 case elfcpp::R_PPC64_TOC16_LO
:
6376 case elfcpp::R_PPC64_TOC16_HI
:
6377 case elfcpp::R_PPC64_TOC16_HA
:
6378 case elfcpp::R_PPC64_TOC16_DS
:
6379 case elfcpp::R_PPC64_TOC16_LO_DS
:
6380 case elfcpp::R_POWERPC_PLT16_LO
:
6381 case elfcpp::R_POWERPC_PLT16_HI
:
6382 case elfcpp::R_POWERPC_PLT16_HA
:
6383 case elfcpp::R_PPC64_PLT16_LO_DS
:
6384 ref
= Symbol::RELATIVE_REF
;
6387 case elfcpp::R_POWERPC_GOT_TPREL16
:
6388 case elfcpp::R_POWERPC_TLS
:
6389 ref
= Symbol::TLS_REF
;
6392 case elfcpp::R_POWERPC_COPY
:
6393 case elfcpp::R_POWERPC_GLOB_DAT
:
6394 case elfcpp::R_POWERPC_JMP_SLOT
:
6395 case elfcpp::R_POWERPC_RELATIVE
:
6396 case elfcpp::R_POWERPC_DTPMOD
:
6398 // Not expected. We will give an error later.
6402 if (size
== 64 && target
->abiversion() < 2)
6403 ref
|= Symbol::FUNC_DESC_ABI
;
6407 // Report an unsupported relocation against a local symbol.
6409 template<int size
, bool big_endian
>
6411 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
6412 Sized_relobj_file
<size
, big_endian
>* object
,
6413 unsigned int r_type
)
6415 gold_error(_("%s: unsupported reloc %u against local symbol"),
6416 object
->name().c_str(), r_type
);
6419 // We are about to emit a dynamic relocation of type R_TYPE. If the
6420 // dynamic linker does not support it, issue an error.
6422 template<int size
, bool big_endian
>
6424 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
6425 unsigned int r_type
)
6427 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
6429 // These are the relocation types supported by glibc for both 32-bit
6430 // and 64-bit powerpc.
6433 case elfcpp::R_POWERPC_NONE
:
6434 case elfcpp::R_POWERPC_RELATIVE
:
6435 case elfcpp::R_POWERPC_GLOB_DAT
:
6436 case elfcpp::R_POWERPC_DTPMOD
:
6437 case elfcpp::R_POWERPC_DTPREL
:
6438 case elfcpp::R_POWERPC_TPREL
:
6439 case elfcpp::R_POWERPC_JMP_SLOT
:
6440 case elfcpp::R_POWERPC_COPY
:
6441 case elfcpp::R_POWERPC_IRELATIVE
:
6442 case elfcpp::R_POWERPC_ADDR32
:
6443 case elfcpp::R_POWERPC_UADDR32
:
6444 case elfcpp::R_POWERPC_ADDR24
:
6445 case elfcpp::R_POWERPC_ADDR16
:
6446 case elfcpp::R_POWERPC_UADDR16
:
6447 case elfcpp::R_POWERPC_ADDR16_LO
:
6448 case elfcpp::R_POWERPC_ADDR16_HI
:
6449 case elfcpp::R_POWERPC_ADDR16_HA
:
6450 case elfcpp::R_POWERPC_ADDR14
:
6451 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6452 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6453 case elfcpp::R_POWERPC_REL32
:
6454 case elfcpp::R_POWERPC_REL24
:
6455 case elfcpp::R_POWERPC_TPREL16
:
6456 case elfcpp::R_POWERPC_TPREL16_LO
:
6457 case elfcpp::R_POWERPC_TPREL16_HI
:
6458 case elfcpp::R_POWERPC_TPREL16_HA
:
6469 // These are the relocation types supported only on 64-bit.
6470 case elfcpp::R_PPC64_ADDR64
:
6471 case elfcpp::R_PPC64_UADDR64
:
6472 case elfcpp::R_PPC64_JMP_IREL
:
6473 case elfcpp::R_PPC64_ADDR16_DS
:
6474 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6475 case elfcpp::R_PPC64_ADDR16_HIGH
:
6476 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6477 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6478 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6479 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6480 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6481 case elfcpp::R_PPC64_REL64
:
6482 case elfcpp::R_POWERPC_ADDR30
:
6483 case elfcpp::R_PPC64_TPREL16_DS
:
6484 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6485 case elfcpp::R_PPC64_TPREL16_HIGH
:
6486 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6487 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6488 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6489 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6490 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6501 // These are the relocation types supported only on 32-bit.
6502 // ??? glibc ld.so doesn't need to support these.
6503 case elfcpp::R_POWERPC_DTPREL16
:
6504 case elfcpp::R_POWERPC_DTPREL16_LO
:
6505 case elfcpp::R_POWERPC_DTPREL16_HI
:
6506 case elfcpp::R_POWERPC_DTPREL16_HA
:
6514 // This prevents us from issuing more than one error per reloc
6515 // section. But we can still wind up issuing more than one
6516 // error per object file.
6517 if (this->issued_non_pic_error_
)
6519 gold_assert(parameters
->options().output_is_position_independent());
6520 object
->error(_("requires unsupported dynamic reloc; "
6521 "recompile with -fPIC"));
6522 this->issued_non_pic_error_
= true;
6526 // Return whether we need to make a PLT entry for a relocation of the
6527 // given type against a STT_GNU_IFUNC symbol.
6529 template<int size
, bool big_endian
>
6531 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6532 Target_powerpc
<size
, big_endian
>* target
,
6533 Sized_relobj_file
<size
, big_endian
>* object
,
6534 unsigned int r_type
,
6537 // In non-pic code any reference will resolve to the plt call stub
6538 // for the ifunc symbol.
6539 if ((size
== 32 || target
->abiversion() >= 2)
6540 && !parameters
->options().output_is_position_independent())
6545 // Word size refs from data sections are OK, but don't need a PLT entry.
6546 case elfcpp::R_POWERPC_ADDR32
:
6547 case elfcpp::R_POWERPC_UADDR32
:
6552 case elfcpp::R_PPC64_ADDR64
:
6553 case elfcpp::R_PPC64_UADDR64
:
6558 // GOT refs are good, but also don't need a PLT entry.
6559 case elfcpp::R_POWERPC_GOT16
:
6560 case elfcpp::R_POWERPC_GOT16_LO
:
6561 case elfcpp::R_POWERPC_GOT16_HI
:
6562 case elfcpp::R_POWERPC_GOT16_HA
:
6563 case elfcpp::R_PPC64_GOT16_DS
:
6564 case elfcpp::R_PPC64_GOT16_LO_DS
:
6567 // PLT relocs are OK and need a PLT entry.
6568 case elfcpp::R_POWERPC_PLT16_LO
:
6569 case elfcpp::R_POWERPC_PLT16_HI
:
6570 case elfcpp::R_POWERPC_PLT16_HA
:
6571 case elfcpp::R_PPC64_PLT16_LO_DS
:
6575 // Function calls are good, and these do need a PLT entry.
6576 case elfcpp::R_POWERPC_ADDR24
:
6577 case elfcpp::R_POWERPC_ADDR14
:
6578 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6579 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6580 case elfcpp::R_POWERPC_REL24
:
6581 case elfcpp::R_PPC_PLTREL24
:
6582 case elfcpp::R_POWERPC_REL14
:
6583 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6584 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6591 // Anything else is a problem.
6592 // If we are building a static executable, the libc startup function
6593 // responsible for applying indirect function relocations is going
6594 // to complain about the reloc type.
6595 // If we are building a dynamic executable, we will have a text
6596 // relocation. The dynamic loader will set the text segment
6597 // writable and non-executable to apply text relocations. So we'll
6598 // segfault when trying to run the indirection function to resolve
6601 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6602 object
->name().c_str(), r_type
);
6606 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6610 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6612 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6613 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6614 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6615 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6616 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6617 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6618 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6619 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6620 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6621 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6622 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6623 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6624 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6625 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6626 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6627 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6628 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6629 /* Exclude lfqu by testing reloc. If relocs are ever
6630 defined for the reduced D field in psq_lu then those
6631 will need testing too. */
6632 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6633 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6634 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6636 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6637 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6638 /* Exclude stfqu. psq_stu as above for psq_lu. */
6639 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6640 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6641 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6642 && (insn
& 1) == 0));
6645 // Scan a relocation for a local symbol.
6647 template<int size
, bool big_endian
>
6649 Target_powerpc
<size
, big_endian
>::Scan::local(
6650 Symbol_table
* symtab
,
6652 Target_powerpc
<size
, big_endian
>* target
,
6653 Sized_relobj_file
<size
, big_endian
>* object
,
6654 unsigned int data_shndx
,
6655 Output_section
* output_section
,
6656 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6657 unsigned int r_type
,
6658 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6661 this->maybe_skip_tls_get_addr_call(target
, r_type
, NULL
);
6663 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6664 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6666 this->expect_tls_get_addr_call();
6667 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6668 if (tls_type
!= tls::TLSOPT_NONE
)
6669 this->skip_next_tls_get_addr_call();
6671 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6672 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6674 this->expect_tls_get_addr_call();
6675 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6676 if (tls_type
!= tls::TLSOPT_NONE
)
6677 this->skip_next_tls_get_addr_call();
6680 Powerpc_relobj
<size
, big_endian
>* ppc_object
6681 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6686 && data_shndx
== ppc_object
->opd_shndx()
6687 && r_type
== elfcpp::R_PPC64_ADDR64
)
6688 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6692 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6693 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6694 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6696 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6697 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6698 r_type
, r_sym
, reloc
.get_r_addend());
6699 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6704 case elfcpp::R_POWERPC_NONE
:
6705 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6706 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6707 case elfcpp::R_POWERPC_TLS
:
6708 case elfcpp::R_PPC64_ENTRY
:
6711 case elfcpp::R_PPC64_TOC
:
6713 Output_data_got_powerpc
<size
, big_endian
>* got
6714 = target
->got_section(symtab
, layout
);
6715 if (parameters
->options().output_is_position_independent())
6717 Address off
= reloc
.get_r_offset();
6719 && target
->abiversion() < 2
6720 && data_shndx
== ppc_object
->opd_shndx()
6721 && ppc_object
->get_opd_discard(off
- 8))
6724 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6725 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6726 rela_dyn
->add_output_section_relative(got
->output_section(),
6727 elfcpp::R_POWERPC_RELATIVE
,
6729 object
, data_shndx
, off
,
6730 symobj
->toc_base_offset());
6735 case elfcpp::R_PPC64_ADDR64
:
6736 case elfcpp::R_PPC64_UADDR64
:
6737 case elfcpp::R_POWERPC_ADDR32
:
6738 case elfcpp::R_POWERPC_UADDR32
:
6739 case elfcpp::R_POWERPC_ADDR24
:
6740 case elfcpp::R_POWERPC_ADDR16
:
6741 case elfcpp::R_POWERPC_ADDR16_LO
:
6742 case elfcpp::R_POWERPC_ADDR16_HI
:
6743 case elfcpp::R_POWERPC_ADDR16_HA
:
6744 case elfcpp::R_POWERPC_UADDR16
:
6745 case elfcpp::R_PPC64_ADDR16_HIGH
:
6746 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6747 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6748 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6749 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6750 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6751 case elfcpp::R_PPC64_ADDR16_DS
:
6752 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6753 case elfcpp::R_POWERPC_ADDR14
:
6754 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6755 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6756 // If building a shared library (or a position-independent
6757 // executable), we need to create a dynamic relocation for
6759 if (parameters
->options().output_is_position_independent()
6760 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6762 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6764 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6765 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6766 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6768 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6769 : elfcpp::R_POWERPC_RELATIVE
);
6770 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6771 output_section
, data_shndx
,
6772 reloc
.get_r_offset(),
6773 reloc
.get_r_addend(), false);
6775 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6777 check_non_pic(object
, r_type
);
6778 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6779 data_shndx
, reloc
.get_r_offset(),
6780 reloc
.get_r_addend());
6784 gold_assert(lsym
.get_st_value() == 0);
6785 unsigned int shndx
= lsym
.get_st_shndx();
6787 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6790 object
->error(_("section symbol %u has bad shndx %u"),
6793 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6794 output_section
, data_shndx
,
6795 reloc
.get_r_offset());
6800 case elfcpp::R_POWERPC_PLT16_LO
:
6801 case elfcpp::R_POWERPC_PLT16_HI
:
6802 case elfcpp::R_POWERPC_PLT16_HA
:
6803 case elfcpp::R_PPC64_PLT16_LO_DS
:
6806 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6807 target
->make_local_plt_entry(layout
, object
, r_sym
);
6811 case elfcpp::R_POWERPC_REL24
:
6812 case elfcpp::R_PPC_PLTREL24
:
6813 case elfcpp::R_PPC_LOCAL24PC
:
6814 case elfcpp::R_POWERPC_REL14
:
6815 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6816 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6819 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6820 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6821 r_type
, r_sym
, reloc
.get_r_addend());
6825 case elfcpp::R_PPC64_TOCSAVE
:
6826 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6827 // caller has already saved r2 and thus a plt call stub need not
6830 && target
->mark_pltcall(ppc_object
, data_shndx
,
6831 reloc
.get_r_offset() - 4, symtab
))
6833 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6834 unsigned int shndx
= lsym
.get_st_shndx();
6836 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6838 object
->error(_("tocsave symbol %u has bad shndx %u"),
6841 target
->add_tocsave(ppc_object
, shndx
,
6842 lsym
.get_st_value() + reloc
.get_r_addend());
6846 case elfcpp::R_PPC64_REL64
:
6847 case elfcpp::R_POWERPC_REL32
:
6848 case elfcpp::R_POWERPC_REL16
:
6849 case elfcpp::R_POWERPC_REL16_LO
:
6850 case elfcpp::R_POWERPC_REL16_HI
:
6851 case elfcpp::R_POWERPC_REL16_HA
:
6852 case elfcpp::R_POWERPC_REL16DX_HA
:
6853 case elfcpp::R_POWERPC_SECTOFF
:
6854 case elfcpp::R_POWERPC_SECTOFF_LO
:
6855 case elfcpp::R_POWERPC_SECTOFF_HI
:
6856 case elfcpp::R_POWERPC_SECTOFF_HA
:
6857 case elfcpp::R_PPC64_SECTOFF_DS
:
6858 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6859 case elfcpp::R_POWERPC_TPREL16
:
6860 case elfcpp::R_POWERPC_TPREL16_LO
:
6861 case elfcpp::R_POWERPC_TPREL16_HI
:
6862 case elfcpp::R_POWERPC_TPREL16_HA
:
6863 case elfcpp::R_PPC64_TPREL16_DS
:
6864 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6865 case elfcpp::R_PPC64_TPREL16_HIGH
:
6866 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6867 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6868 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6869 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6870 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6871 case elfcpp::R_POWERPC_DTPREL16
:
6872 case elfcpp::R_POWERPC_DTPREL16_LO
:
6873 case elfcpp::R_POWERPC_DTPREL16_HI
:
6874 case elfcpp::R_POWERPC_DTPREL16_HA
:
6875 case elfcpp::R_PPC64_DTPREL16_DS
:
6876 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6877 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6878 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6879 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6880 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6881 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6882 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6883 case elfcpp::R_PPC64_TLSGD
:
6884 case elfcpp::R_PPC64_TLSLD
:
6885 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6888 case elfcpp::R_POWERPC_GOT16
:
6889 case elfcpp::R_POWERPC_GOT16_LO
:
6890 case elfcpp::R_POWERPC_GOT16_HI
:
6891 case elfcpp::R_POWERPC_GOT16_HA
:
6892 case elfcpp::R_PPC64_GOT16_DS
:
6893 case elfcpp::R_PPC64_GOT16_LO_DS
:
6895 // The symbol requires a GOT entry.
6896 Output_data_got_powerpc
<size
, big_endian
>* got
6897 = target
->got_section(symtab
, layout
);
6898 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6900 if (!parameters
->options().output_is_position_independent())
6903 && (size
== 32 || target
->abiversion() >= 2))
6904 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6906 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6908 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6910 // If we are generating a shared object or a pie, this
6911 // symbol's GOT entry will be set by a dynamic relocation.
6913 off
= got
->add_constant(0);
6914 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6916 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6918 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6919 : elfcpp::R_POWERPC_RELATIVE
);
6920 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6921 got
, off
, 0, false);
6926 case elfcpp::R_PPC64_TOC16
:
6927 case elfcpp::R_PPC64_TOC16_LO
:
6928 case elfcpp::R_PPC64_TOC16_HI
:
6929 case elfcpp::R_PPC64_TOC16_HA
:
6930 case elfcpp::R_PPC64_TOC16_DS
:
6931 case elfcpp::R_PPC64_TOC16_LO_DS
:
6932 // We need a GOT section.
6933 target
->got_section(symtab
, layout
);
6936 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6937 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6938 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6939 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6941 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6942 if (tls_type
== tls::TLSOPT_NONE
)
6944 Output_data_got_powerpc
<size
, big_endian
>* got
6945 = target
->got_section(symtab
, layout
);
6946 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6947 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6948 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6949 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6951 else if (tls_type
== tls::TLSOPT_TO_LE
)
6953 // no GOT relocs needed for Local Exec.
6960 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6961 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6962 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6963 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6965 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6966 if (tls_type
== tls::TLSOPT_NONE
)
6967 target
->tlsld_got_offset(symtab
, layout
, object
);
6968 else if (tls_type
== tls::TLSOPT_TO_LE
)
6970 // no GOT relocs needed for Local Exec.
6971 if (parameters
->options().emit_relocs())
6973 Output_section
* os
= layout
->tls_segment()->first_section();
6974 gold_assert(os
!= NULL
);
6975 os
->set_needs_symtab_index();
6983 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6984 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6985 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6986 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6988 Output_data_got_powerpc
<size
, big_endian
>* got
6989 = target
->got_section(symtab
, layout
);
6990 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6991 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6995 case elfcpp::R_POWERPC_GOT_TPREL16
:
6996 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6997 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6998 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7000 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
7001 if (tls_type
== tls::TLSOPT_NONE
)
7003 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7004 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
7006 Output_data_got_powerpc
<size
, big_endian
>* got
7007 = target
->got_section(symtab
, layout
);
7008 unsigned int off
= got
->add_constant(0);
7009 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
7011 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7012 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
7013 elfcpp::R_POWERPC_TPREL
,
7017 else if (tls_type
== tls::TLSOPT_TO_LE
)
7019 // no GOT relocs needed for Local Exec.
7027 unsupported_reloc_local(object
, r_type
);
7032 && parameters
->options().toc_optimize())
7034 if (data_shndx
== ppc_object
->toc_shndx())
7037 if (r_type
!= elfcpp::R_PPC64_ADDR64
7038 || (is_ifunc
&& target
->abiversion() < 2))
7040 else if (parameters
->options().output_is_position_independent())
7046 unsigned int shndx
= lsym
.get_st_shndx();
7047 if (shndx
>= elfcpp::SHN_LORESERVE
7048 && shndx
!= elfcpp::SHN_XINDEX
)
7053 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7056 enum {no_check
, check_lo
, check_ha
} insn_check
;
7060 insn_check
= no_check
;
7063 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7064 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7065 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7066 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7067 case elfcpp::R_POWERPC_GOT16_HA
:
7068 case elfcpp::R_PPC64_TOC16_HA
:
7069 insn_check
= check_ha
;
7072 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7073 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7074 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7075 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7076 case elfcpp::R_POWERPC_GOT16_LO
:
7077 case elfcpp::R_PPC64_GOT16_LO_DS
:
7078 case elfcpp::R_PPC64_TOC16_LO
:
7079 case elfcpp::R_PPC64_TOC16_LO_DS
:
7080 insn_check
= check_lo
;
7084 section_size_type slen
;
7085 const unsigned char* view
= NULL
;
7086 if (insn_check
!= no_check
)
7088 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7089 section_size_type off
=
7090 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7093 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7094 if (insn_check
== check_lo
7095 ? !ok_lo_toc_insn(insn
, r_type
)
7096 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7097 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7099 ppc_object
->set_no_toc_opt();
7100 gold_warning(_("%s: toc optimization is not supported "
7101 "for %#08x instruction"),
7102 ppc_object
->name().c_str(), insn
);
7111 case elfcpp::R_PPC64_TOC16
:
7112 case elfcpp::R_PPC64_TOC16_LO
:
7113 case elfcpp::R_PPC64_TOC16_HI
:
7114 case elfcpp::R_PPC64_TOC16_HA
:
7115 case elfcpp::R_PPC64_TOC16_DS
:
7116 case elfcpp::R_PPC64_TOC16_LO_DS
:
7117 unsigned int shndx
= lsym
.get_st_shndx();
7118 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7120 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7121 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
7123 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_addend();
7124 if (dst_off
< ppc_object
->section_size(shndx
))
7127 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7129 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7131 // Need to check that the insn is a ld
7133 view
= ppc_object
->section_contents(data_shndx
,
7136 section_size_type off
=
7137 (convert_to_section_size_type(reloc
.get_r_offset())
7138 + (big_endian
? -2 : 3));
7140 && (view
[off
] & (0x3f << 2)) == 58u << 2)
7144 ppc_object
->set_no_toc_opt(dst_off
);
7155 case elfcpp::R_POWERPC_REL32
:
7156 if (ppc_object
->got2_shndx() != 0
7157 && parameters
->options().output_is_position_independent())
7159 unsigned int shndx
= lsym
.get_st_shndx();
7160 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7162 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7163 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
7164 && (ppc_object
->section_flags(data_shndx
)
7165 & elfcpp::SHF_EXECINSTR
) != 0)
7166 gold_error(_("%s: unsupported -mbss-plt code"),
7167 ppc_object
->name().c_str());
7177 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7178 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7179 case elfcpp::R_POWERPC_GOT_TPREL16
:
7180 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7181 case elfcpp::R_POWERPC_GOT16
:
7182 case elfcpp::R_PPC64_GOT16_DS
:
7183 case elfcpp::R_PPC64_TOC16
:
7184 case elfcpp::R_PPC64_TOC16_DS
:
7185 ppc_object
->set_has_small_toc_reloc();
7191 // Report an unsupported relocation against a global symbol.
7193 template<int size
, bool big_endian
>
7195 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
7196 Sized_relobj_file
<size
, big_endian
>* object
,
7197 unsigned int r_type
,
7200 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
7201 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
7204 // Scan a relocation for a global symbol.
7206 template<int size
, bool big_endian
>
7208 Target_powerpc
<size
, big_endian
>::Scan::global(
7209 Symbol_table
* symtab
,
7211 Target_powerpc
<size
, big_endian
>* target
,
7212 Sized_relobj_file
<size
, big_endian
>* object
,
7213 unsigned int data_shndx
,
7214 Output_section
* output_section
,
7215 const elfcpp::Rela
<size
, big_endian
>& reloc
,
7216 unsigned int r_type
,
7219 if (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
)
7223 if (target
->replace_tls_get_addr(gsym
))
7224 // Change a __tls_get_addr reference to __tls_get_addr_opt
7225 // so dynamic relocs are emitted against the latter symbol.
7226 gsym
= target
->tls_get_addr_opt();
7228 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7229 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7231 this->expect_tls_get_addr_call();
7232 const bool final
= gsym
->final_value_is_known();
7233 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7234 if (tls_type
!= tls::TLSOPT_NONE
)
7235 this->skip_next_tls_get_addr_call();
7237 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7238 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7240 this->expect_tls_get_addr_call();
7241 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7242 if (tls_type
!= tls::TLSOPT_NONE
)
7243 this->skip_next_tls_get_addr_call();
7246 Powerpc_relobj
<size
, big_endian
>* ppc_object
7247 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7249 // A STT_GNU_IFUNC symbol may require a PLT entry.
7250 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
7251 bool pushed_ifunc
= false;
7252 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
7254 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7255 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7256 r_type
, r_sym
, reloc
.get_r_addend());
7257 target
->make_plt_entry(symtab
, layout
, gsym
);
7258 pushed_ifunc
= true;
7263 case elfcpp::R_POWERPC_NONE
:
7264 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7265 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7266 case elfcpp::R_PPC_LOCAL24PC
:
7267 case elfcpp::R_POWERPC_TLS
:
7268 case elfcpp::R_PPC64_ENTRY
:
7271 case elfcpp::R_PPC64_TOC
:
7273 Output_data_got_powerpc
<size
, big_endian
>* got
7274 = target
->got_section(symtab
, layout
);
7275 if (parameters
->options().output_is_position_independent())
7277 Address off
= reloc
.get_r_offset();
7279 && data_shndx
== ppc_object
->opd_shndx()
7280 && ppc_object
->get_opd_discard(off
- 8))
7283 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7284 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
7285 if (data_shndx
!= ppc_object
->opd_shndx())
7286 symobj
= static_cast
7287 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7288 rela_dyn
->add_output_section_relative(got
->output_section(),
7289 elfcpp::R_POWERPC_RELATIVE
,
7291 object
, data_shndx
, off
,
7292 symobj
->toc_base_offset());
7297 case elfcpp::R_PPC64_ADDR64
:
7299 && target
->abiversion() < 2
7300 && data_shndx
== ppc_object
->opd_shndx()
7301 && (gsym
->is_defined_in_discarded_section()
7302 || gsym
->object() != object
))
7304 ppc_object
->set_opd_discard(reloc
.get_r_offset());
7308 case elfcpp::R_PPC64_UADDR64
:
7309 case elfcpp::R_POWERPC_ADDR32
:
7310 case elfcpp::R_POWERPC_UADDR32
:
7311 case elfcpp::R_POWERPC_ADDR24
:
7312 case elfcpp::R_POWERPC_ADDR16
:
7313 case elfcpp::R_POWERPC_ADDR16_LO
:
7314 case elfcpp::R_POWERPC_ADDR16_HI
:
7315 case elfcpp::R_POWERPC_ADDR16_HA
:
7316 case elfcpp::R_POWERPC_UADDR16
:
7317 case elfcpp::R_PPC64_ADDR16_HIGH
:
7318 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7319 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7320 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7321 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7322 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7323 case elfcpp::R_PPC64_ADDR16_DS
:
7324 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7325 case elfcpp::R_POWERPC_ADDR14
:
7326 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7327 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7329 // Make a PLT entry if necessary.
7330 if (gsym
->needs_plt_entry())
7332 // Since this is not a PC-relative relocation, we may be
7333 // taking the address of a function. In that case we need to
7334 // set the entry in the dynamic symbol table to the address of
7335 // the PLT call stub.
7336 bool need_ifunc_plt
= false;
7337 if ((size
== 32 || target
->abiversion() >= 2)
7338 && gsym
->is_from_dynobj()
7339 && !parameters
->options().output_is_position_independent())
7341 gsym
->set_needs_dynsym_value();
7342 need_ifunc_plt
= true;
7344 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
7346 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7347 target
->push_branch(ppc_object
, data_shndx
,
7348 reloc
.get_r_offset(), r_type
, r_sym
,
7349 reloc
.get_r_addend());
7350 target
->make_plt_entry(symtab
, layout
, gsym
);
7353 // Make a dynamic relocation if necessary.
7354 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
7355 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
7357 if (!parameters
->options().output_is_position_independent()
7358 && gsym
->may_need_copy_reloc())
7360 target
->copy_reloc(symtab
, layout
, object
,
7361 data_shndx
, output_section
, gsym
, reloc
);
7363 else if ((((size
== 32
7364 && r_type
== elfcpp::R_POWERPC_ADDR32
)
7366 && r_type
== elfcpp::R_PPC64_ADDR64
7367 && target
->abiversion() >= 2))
7368 && gsym
->can_use_relative_reloc(false)
7369 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
7370 && parameters
->options().shared()))
7372 && r_type
== elfcpp::R_PPC64_ADDR64
7373 && target
->abiversion() < 2
7374 && (gsym
->can_use_relative_reloc(false)
7375 || data_shndx
== ppc_object
->opd_shndx())))
7377 Reloc_section
* rela_dyn
7378 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7379 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7380 : elfcpp::R_POWERPC_RELATIVE
);
7381 rela_dyn
->add_symbolless_global_addend(
7382 gsym
, dynrel
, output_section
, object
, data_shndx
,
7383 reloc
.get_r_offset(), reloc
.get_r_addend());
7387 Reloc_section
* rela_dyn
7388 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7389 check_non_pic(object
, r_type
);
7390 rela_dyn
->add_global(gsym
, r_type
, output_section
,
7392 reloc
.get_r_offset(),
7393 reloc
.get_r_addend());
7396 && parameters
->options().toc_optimize()
7397 && data_shndx
== ppc_object
->toc_shndx())
7398 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7404 case elfcpp::R_POWERPC_PLT16_LO
:
7405 case elfcpp::R_POWERPC_PLT16_HI
:
7406 case elfcpp::R_POWERPC_PLT16_HA
:
7407 case elfcpp::R_PPC64_PLT16_LO_DS
:
7409 target
->make_plt_entry(symtab
, layout
, gsym
);
7412 case elfcpp::R_PPC_PLTREL24
:
7413 case elfcpp::R_POWERPC_REL24
:
7416 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7417 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7418 r_type
, r_sym
, reloc
.get_r_addend());
7419 if (gsym
->needs_plt_entry()
7420 || (!gsym
->final_value_is_known()
7421 && (gsym
->is_undefined()
7422 || gsym
->is_from_dynobj()
7423 || gsym
->is_preemptible())))
7424 target
->make_plt_entry(symtab
, layout
, gsym
);
7428 case elfcpp::R_PPC64_REL64
:
7429 case elfcpp::R_POWERPC_REL32
:
7430 // Make a dynamic relocation if necessary.
7431 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
7433 if (!parameters
->options().output_is_position_independent()
7434 && gsym
->may_need_copy_reloc())
7436 target
->copy_reloc(symtab
, layout
, object
,
7437 data_shndx
, output_section
, gsym
,
7442 Reloc_section
* rela_dyn
7443 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7444 check_non_pic(object
, r_type
);
7445 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
7446 data_shndx
, reloc
.get_r_offset(),
7447 reloc
.get_r_addend());
7452 case elfcpp::R_POWERPC_REL14
:
7453 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7454 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7457 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7458 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7459 r_type
, r_sym
, reloc
.get_r_addend());
7463 case elfcpp::R_PPC64_TOCSAVE
:
7464 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7465 // caller has already saved r2 and thus a plt call stub need not
7468 && target
->mark_pltcall(ppc_object
, data_shndx
,
7469 reloc
.get_r_offset() - 4, symtab
))
7471 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7473 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7475 object
->error(_("tocsave symbol %u has bad shndx %u"),
7479 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7480 target
->add_tocsave(ppc_object
, shndx
,
7481 sym
->value() + reloc
.get_r_addend());
7486 case elfcpp::R_POWERPC_REL16
:
7487 case elfcpp::R_POWERPC_REL16_LO
:
7488 case elfcpp::R_POWERPC_REL16_HI
:
7489 case elfcpp::R_POWERPC_REL16_HA
:
7490 case elfcpp::R_POWERPC_REL16DX_HA
:
7491 case elfcpp::R_POWERPC_SECTOFF
:
7492 case elfcpp::R_POWERPC_SECTOFF_LO
:
7493 case elfcpp::R_POWERPC_SECTOFF_HI
:
7494 case elfcpp::R_POWERPC_SECTOFF_HA
:
7495 case elfcpp::R_PPC64_SECTOFF_DS
:
7496 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7497 case elfcpp::R_POWERPC_TPREL16
:
7498 case elfcpp::R_POWERPC_TPREL16_LO
:
7499 case elfcpp::R_POWERPC_TPREL16_HI
:
7500 case elfcpp::R_POWERPC_TPREL16_HA
:
7501 case elfcpp::R_PPC64_TPREL16_DS
:
7502 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7503 case elfcpp::R_PPC64_TPREL16_HIGH
:
7504 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7505 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7506 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7507 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7508 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7509 case elfcpp::R_POWERPC_DTPREL16
:
7510 case elfcpp::R_POWERPC_DTPREL16_LO
:
7511 case elfcpp::R_POWERPC_DTPREL16_HI
:
7512 case elfcpp::R_POWERPC_DTPREL16_HA
:
7513 case elfcpp::R_PPC64_DTPREL16_DS
:
7514 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7515 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7516 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7517 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7518 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7519 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7520 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7521 case elfcpp::R_PPC64_TLSGD
:
7522 case elfcpp::R_PPC64_TLSLD
:
7523 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7526 case elfcpp::R_POWERPC_GOT16
:
7527 case elfcpp::R_POWERPC_GOT16_LO
:
7528 case elfcpp::R_POWERPC_GOT16_HI
:
7529 case elfcpp::R_POWERPC_GOT16_HA
:
7530 case elfcpp::R_PPC64_GOT16_DS
:
7531 case elfcpp::R_PPC64_GOT16_LO_DS
:
7533 // The symbol requires a GOT entry.
7534 Output_data_got_powerpc
<size
, big_endian
>* got
;
7536 got
= target
->got_section(symtab
, layout
);
7537 if (gsym
->final_value_is_known())
7540 && (size
== 32 || target
->abiversion() >= 2))
7541 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7543 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7545 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7547 // If we are generating a shared object or a pie, this
7548 // symbol's GOT entry will be set by a dynamic relocation.
7549 unsigned int off
= got
->add_constant(0);
7550 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7552 Reloc_section
* rela_dyn
7553 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7555 if (gsym
->can_use_relative_reloc(false)
7557 || target
->abiversion() >= 2)
7558 && gsym
->visibility() == elfcpp::STV_PROTECTED
7559 && parameters
->options().shared()))
7561 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7562 : elfcpp::R_POWERPC_RELATIVE
);
7563 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7567 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7568 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7574 case elfcpp::R_PPC64_TOC16
:
7575 case elfcpp::R_PPC64_TOC16_LO
:
7576 case elfcpp::R_PPC64_TOC16_HI
:
7577 case elfcpp::R_PPC64_TOC16_HA
:
7578 case elfcpp::R_PPC64_TOC16_DS
:
7579 case elfcpp::R_PPC64_TOC16_LO_DS
:
7580 // We need a GOT section.
7581 target
->got_section(symtab
, layout
);
7584 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7585 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7586 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7587 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7589 const bool final
= gsym
->final_value_is_known();
7590 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7591 if (tls_type
== tls::TLSOPT_NONE
)
7593 Output_data_got_powerpc
<size
, big_endian
>* got
7594 = target
->got_section(symtab
, layout
);
7595 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7596 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7597 elfcpp::R_POWERPC_DTPMOD
,
7598 elfcpp::R_POWERPC_DTPREL
);
7600 else if (tls_type
== tls::TLSOPT_TO_IE
)
7602 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7604 Output_data_got_powerpc
<size
, big_endian
>* got
7605 = target
->got_section(symtab
, layout
);
7606 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7607 if (gsym
->is_undefined()
7608 || gsym
->is_from_dynobj())
7610 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7611 elfcpp::R_POWERPC_TPREL
);
7615 unsigned int off
= got
->add_constant(0);
7616 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7617 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7618 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7623 else if (tls_type
== tls::TLSOPT_TO_LE
)
7625 // no GOT relocs needed for Local Exec.
7632 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7633 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7634 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7635 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7637 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7638 if (tls_type
== tls::TLSOPT_NONE
)
7639 target
->tlsld_got_offset(symtab
, layout
, object
);
7640 else if (tls_type
== tls::TLSOPT_TO_LE
)
7642 // no GOT relocs needed for Local Exec.
7643 if (parameters
->options().emit_relocs())
7645 Output_section
* os
= layout
->tls_segment()->first_section();
7646 gold_assert(os
!= NULL
);
7647 os
->set_needs_symtab_index();
7655 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7656 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7657 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7658 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7660 Output_data_got_powerpc
<size
, big_endian
>* got
7661 = target
->got_section(symtab
, layout
);
7662 if (!gsym
->final_value_is_known()
7663 && (gsym
->is_from_dynobj()
7664 || gsym
->is_undefined()
7665 || gsym
->is_preemptible()))
7666 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7667 target
->rela_dyn_section(layout
),
7668 elfcpp::R_POWERPC_DTPREL
);
7670 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7674 case elfcpp::R_POWERPC_GOT_TPREL16
:
7675 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7676 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7677 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7679 const bool final
= gsym
->final_value_is_known();
7680 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7681 if (tls_type
== tls::TLSOPT_NONE
)
7683 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7685 Output_data_got_powerpc
<size
, big_endian
>* got
7686 = target
->got_section(symtab
, layout
);
7687 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7688 if (gsym
->is_undefined()
7689 || gsym
->is_from_dynobj())
7691 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7692 elfcpp::R_POWERPC_TPREL
);
7696 unsigned int off
= got
->add_constant(0);
7697 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7698 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7699 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7704 else if (tls_type
== tls::TLSOPT_TO_LE
)
7706 // no GOT relocs needed for Local Exec.
7714 unsupported_reloc_global(object
, r_type
, gsym
);
7719 && parameters
->options().toc_optimize())
7721 if (data_shndx
== ppc_object
->toc_shndx())
7724 if (r_type
!= elfcpp::R_PPC64_ADDR64
7725 || (is_ifunc
&& target
->abiversion() < 2))
7727 else if (parameters
->options().output_is_position_independent()
7728 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7731 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7734 enum {no_check
, check_lo
, check_ha
} insn_check
;
7738 insn_check
= no_check
;
7741 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7742 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7743 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7744 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7745 case elfcpp::R_POWERPC_GOT16_HA
:
7746 case elfcpp::R_PPC64_TOC16_HA
:
7747 insn_check
= check_ha
;
7750 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7751 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7752 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7753 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7754 case elfcpp::R_POWERPC_GOT16_LO
:
7755 case elfcpp::R_PPC64_GOT16_LO_DS
:
7756 case elfcpp::R_PPC64_TOC16_LO
:
7757 case elfcpp::R_PPC64_TOC16_LO_DS
:
7758 insn_check
= check_lo
;
7762 section_size_type slen
;
7763 const unsigned char* view
= NULL
;
7764 if (insn_check
!= no_check
)
7766 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7767 section_size_type off
=
7768 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7771 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7772 if (insn_check
== check_lo
7773 ? !ok_lo_toc_insn(insn
, r_type
)
7774 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7775 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7777 ppc_object
->set_no_toc_opt();
7778 gold_warning(_("%s: toc optimization is not supported "
7779 "for %#08x instruction"),
7780 ppc_object
->name().c_str(), insn
);
7789 case elfcpp::R_PPC64_TOC16
:
7790 case elfcpp::R_PPC64_TOC16_LO
:
7791 case elfcpp::R_PPC64_TOC16_HI
:
7792 case elfcpp::R_PPC64_TOC16_HA
:
7793 case elfcpp::R_PPC64_TOC16_DS
:
7794 case elfcpp::R_PPC64_TOC16_LO_DS
:
7795 if (gsym
->source() == Symbol::FROM_OBJECT
7796 && !gsym
->object()->is_dynamic())
7798 Powerpc_relobj
<size
, big_endian
>* sym_object
7799 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7801 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7802 if (shndx
== sym_object
->toc_shndx())
7804 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7805 Address dst_off
= sym
->value() + reloc
.get_r_addend();
7806 if (dst_off
< sym_object
->section_size(shndx
))
7809 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7811 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7813 // Need to check that the insn is a ld
7815 view
= ppc_object
->section_contents(data_shndx
,
7818 section_size_type off
=
7819 (convert_to_section_size_type(reloc
.get_r_offset())
7820 + (big_endian
? -2 : 3));
7822 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7826 sym_object
->set_no_toc_opt(dst_off
);
7838 case elfcpp::R_PPC_LOCAL24PC
:
7839 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7840 gold_error(_("%s: unsupported -mbss-plt code"),
7841 ppc_object
->name().c_str());
7850 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7851 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7852 case elfcpp::R_POWERPC_GOT_TPREL16
:
7853 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7854 case elfcpp::R_POWERPC_GOT16
:
7855 case elfcpp::R_PPC64_GOT16_DS
:
7856 case elfcpp::R_PPC64_TOC16
:
7857 case elfcpp::R_PPC64_TOC16_DS
:
7858 ppc_object
->set_has_small_toc_reloc();
7864 // Process relocations for gc.
7866 template<int size
, bool big_endian
>
7868 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
7869 Symbol_table
* symtab
,
7871 Sized_relobj_file
<size
, big_endian
>* object
,
7872 unsigned int data_shndx
,
7874 const unsigned char* prelocs
,
7876 Output_section
* output_section
,
7877 bool needs_special_offset_handling
,
7878 size_t local_symbol_count
,
7879 const unsigned char* plocal_symbols
)
7881 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7882 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7885 Powerpc_relobj
<size
, big_endian
>* ppc_object
7886 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7888 ppc_object
->set_opd_valid();
7889 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7891 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7892 for (p
= ppc_object
->access_from_map()->begin();
7893 p
!= ppc_object
->access_from_map()->end();
7896 Address dst_off
= p
->first
;
7897 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7898 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7899 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7901 Relobj
* src_obj
= s
->first
;
7902 unsigned int src_indx
= s
->second
;
7903 symtab
->gc()->add_reference(src_obj
, src_indx
,
7904 ppc_object
, dst_indx
);
7908 ppc_object
->access_from_map()->clear();
7909 ppc_object
->process_gc_mark(symtab
);
7910 // Don't look at .opd relocs as .opd will reference everything.
7914 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7923 needs_special_offset_handling
,
7928 // Handle target specific gc actions when adding a gc reference from
7929 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7930 // and DST_OFF. For powerpc64, this adds a referenc to the code
7931 // section of a function descriptor.
7933 template<int size
, bool big_endian
>
7935 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7936 Symbol_table
* symtab
,
7938 unsigned int src_shndx
,
7940 unsigned int dst_shndx
,
7941 Address dst_off
) const
7943 if (size
!= 64 || dst_obj
->is_dynamic())
7946 Powerpc_relobj
<size
, big_endian
>* ppc_object
7947 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7948 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7950 if (ppc_object
->opd_valid())
7952 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7953 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7957 // If we haven't run scan_opd_relocs, we must delay
7958 // processing this function descriptor reference.
7959 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7964 // Add any special sections for this symbol to the gc work list.
7965 // For powerpc64, this adds the code section of a function
7968 template<int size
, bool big_endian
>
7970 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7971 Symbol_table
* symtab
,
7976 Powerpc_relobj
<size
, big_endian
>* ppc_object
7977 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7979 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7980 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7982 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7983 Address dst_off
= gsym
->value();
7984 if (ppc_object
->opd_valid())
7986 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7987 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7991 ppc_object
->add_gc_mark(dst_off
);
7996 // For a symbol location in .opd, set LOC to the location of the
7999 template<int size
, bool big_endian
>
8001 Target_powerpc
<size
, big_endian
>::do_function_location(
8002 Symbol_location
* loc
) const
8004 if (size
== 64 && loc
->shndx
!= 0)
8006 if (loc
->object
->is_dynamic())
8008 Powerpc_dynobj
<size
, big_endian
>* ppc_object
8009 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
8010 if (loc
->shndx
== ppc_object
->opd_shndx())
8013 Address off
= loc
->offset
- ppc_object
->opd_address();
8014 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
8015 loc
->offset
= dest_off
;
8020 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8021 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
8022 if (loc
->shndx
== ppc_object
->opd_shndx())
8025 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
8026 loc
->offset
= dest_off
;
8032 // FNOFFSET in section SHNDX in OBJECT is the start of a function
8033 // compiled with -fsplit-stack. The function calls non-split-stack
8034 // code. Change the function to ensure it has enough stack space to
8035 // call some random function.
8037 template<int size
, bool big_endian
>
8039 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
8042 section_offset_type fnoffset
,
8043 section_size_type fnsize
,
8044 const unsigned char* prelocs
,
8046 unsigned char* view
,
8047 section_size_type view_size
,
8049 std::string
* to
) const
8051 // 32-bit not supported.
8055 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
8056 prelocs
, reloc_count
, view
, view_size
,
8061 // The function always starts with
8062 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
8063 // addis %r12,%r1,-allocate@ha
8064 // addi %r12,%r12,-allocate@l
8066 // but note that the addis or addi may be replaced with a nop
8068 unsigned char *entry
= view
+ fnoffset
;
8069 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
8071 if ((insn
& 0xffff0000) == addis_2_12
)
8073 /* Skip ELFv2 global entry code. */
8075 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
8078 unsigned char *pinsn
= entry
;
8080 const uint32_t ld_private_ss
= 0xe80d8fc0;
8081 if (insn
== ld_private_ss
)
8083 int32_t allocate
= 0;
8087 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
8088 if ((insn
& 0xffff0000) == addis_12_1
)
8089 allocate
+= (insn
& 0xffff) << 16;
8090 else if ((insn
& 0xffff0000) == addi_12_1
8091 || (insn
& 0xffff0000) == addi_12_12
)
8092 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
8093 else if (insn
!= nop
)
8096 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
8098 int extra
= parameters
->options().split_stack_adjust_size();
8100 if (allocate
>= 0 || extra
< 0)
8102 object
->error(_("split-stack stack size overflow at "
8103 "section %u offset %0zx"),
8104 shndx
, static_cast<size_t>(fnoffset
));
8108 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
8109 if (insn
!= addis_12_1
)
8111 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
8113 insn
= addi_12_12
| (allocate
& 0xffff);
8114 if (insn
!= addi_12_12
)
8116 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
8122 insn
= addi_12_1
| (allocate
& 0xffff);
8123 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
8126 if (pinsn
!= entry
+ 12)
8127 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
8135 if (!object
->has_no_split_stack())
8136 object
->error(_("failed to match split-stack sequence at "
8137 "section %u offset %0zx"),
8138 shndx
, static_cast<size_t>(fnoffset
));
8142 // Scan relocations for a section.
8144 template<int size
, bool big_endian
>
8146 Target_powerpc
<size
, big_endian
>::scan_relocs(
8147 Symbol_table
* symtab
,
8149 Sized_relobj_file
<size
, big_endian
>* object
,
8150 unsigned int data_shndx
,
8151 unsigned int sh_type
,
8152 const unsigned char* prelocs
,
8154 Output_section
* output_section
,
8155 bool needs_special_offset_handling
,
8156 size_t local_symbol_count
,
8157 const unsigned char* plocal_symbols
)
8159 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
8160 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8163 if (!this->plt_localentry0_init_
)
8165 bool plt_localentry0
= false;
8167 && this->abiversion() >= 2)
8169 if (parameters
->options().user_set_plt_localentry())
8170 plt_localentry0
= parameters
->options().plt_localentry();
8172 && symtab
->lookup("GLIBC_2.26", NULL
) == NULL
)
8173 gold_warning(_("--plt-localentry is especially dangerous without "
8174 "ld.so support to detect ABI violations"));
8176 this->plt_localentry0_
= plt_localentry0
;
8177 this->plt_localentry0_init_
= true;
8180 if (sh_type
== elfcpp::SHT_REL
)
8182 gold_error(_("%s: unsupported REL reloc section"),
8183 object
->name().c_str());
8187 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
8196 needs_special_offset_handling
,
8201 // Functor class for processing the global symbol table.
8202 // Removes symbols defined on discarded opd entries.
8204 template<bool big_endian
>
8205 class Global_symbol_visitor_opd
8208 Global_symbol_visitor_opd()
8212 operator()(Sized_symbol
<64>* sym
)
8214 if (sym
->has_symtab_index()
8215 || sym
->source() != Symbol::FROM_OBJECT
8216 || !sym
->in_real_elf())
8219 if (sym
->object()->is_dynamic())
8222 Powerpc_relobj
<64, big_endian
>* symobj
8223 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
8224 if (symobj
->opd_shndx() == 0)
8228 unsigned int shndx
= sym
->shndx(&is_ordinary
);
8229 if (shndx
== symobj
->opd_shndx()
8230 && symobj
->get_opd_discard(sym
->value()))
8232 sym
->set_undefined();
8233 sym
->set_visibility(elfcpp::STV_DEFAULT
);
8234 sym
->set_is_defined_in_discarded_section();
8235 sym
->set_symtab_index(-1U);
8240 template<int size
, bool big_endian
>
8242 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
8244 Symbol_table
* symtab
)
8248 Output_data_save_res
<size
, big_endian
>* savres
8249 = new Output_data_save_res
<size
, big_endian
>(symtab
);
8250 this->savres_section_
= savres
;
8251 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8252 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
8253 savres
, ORDER_TEXT
, false);
8257 // Sort linker created .got section first (for the header), then input
8258 // sections belonging to files using small model code.
8260 template<bool big_endian
>
8261 class Sort_toc_sections
8265 operator()(const Output_section::Input_section
& is1
,
8266 const Output_section::Input_section
& is2
) const
8268 if (!is1
.is_input_section() && is2
.is_input_section())
8271 = (is1
.is_input_section()
8272 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
8273 ->has_small_toc_reloc()));
8275 = (is2
.is_input_section()
8276 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
8277 ->has_small_toc_reloc()));
8278 return small1
&& !small2
;
8282 // Finalize the sections.
8284 template<int size
, bool big_endian
>
8286 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
8288 const Input_objects
*,
8289 Symbol_table
* symtab
)
8291 if (parameters
->doing_static_link())
8293 // At least some versions of glibc elf-init.o have a strong
8294 // reference to __rela_iplt marker syms. A weak ref would be
8296 if (this->iplt_
!= NULL
)
8298 Reloc_section
* rel
= this->iplt_
->rel_plt();
8299 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
8300 Symbol_table::PREDEFINED
, rel
, 0, 0,
8301 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8302 elfcpp::STV_HIDDEN
, 0, false, true);
8303 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
8304 Symbol_table::PREDEFINED
, rel
, 0, 0,
8305 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8306 elfcpp::STV_HIDDEN
, 0, true, true);
8310 symtab
->define_as_constant("__rela_iplt_start", NULL
,
8311 Symbol_table::PREDEFINED
, 0, 0,
8312 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8313 elfcpp::STV_HIDDEN
, 0, true, false);
8314 symtab
->define_as_constant("__rela_iplt_end", NULL
,
8315 Symbol_table::PREDEFINED
, 0, 0,
8316 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8317 elfcpp::STV_HIDDEN
, 0, true, false);
8323 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
8324 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
8326 if (!parameters
->options().relocatable())
8328 this->define_save_restore_funcs(layout
, symtab
);
8330 // Annoyingly, we need to make these sections now whether or
8331 // not we need them. If we delay until do_relax then we
8332 // need to mess with the relaxation machinery checkpointing.
8333 this->got_section(symtab
, layout
);
8334 this->make_brlt_section(layout
);
8336 if (parameters
->options().toc_sort())
8338 Output_section
* os
= this->got_
->output_section();
8339 if (os
!= NULL
&& os
->input_sections().size() > 1)
8340 std::stable_sort(os
->input_sections().begin(),
8341 os
->input_sections().end(),
8342 Sort_toc_sections
<big_endian
>());
8347 // Fill in some more dynamic tags.
8348 Output_data_dynamic
* odyn
= layout
->dynamic_data();
8351 const Reloc_section
* rel_plt
= (this->plt_
== NULL
8353 : this->plt_
->rel_plt());
8354 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
8355 this->rela_dyn_
, true, size
== 32);
8359 if (this->got_
!= NULL
)
8361 this->got_
->finalize_data_size();
8362 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
8363 this->got_
, this->got_
->g_o_t());
8365 if (this->has_tls_get_addr_opt_
)
8366 odyn
->add_constant(elfcpp::DT_PPC_OPT
, elfcpp::PPC_OPT_TLS
);
8370 if (this->glink_
!= NULL
)
8372 this->glink_
->finalize_data_size();
8373 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
8375 (this->glink_
->pltresolve_size()
8378 if (this->has_localentry0_
|| this->has_tls_get_addr_opt_
)
8379 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
8380 ((this->has_localentry0_
8381 ? elfcpp::PPC64_OPT_LOCALENTRY
: 0)
8382 | (this->has_tls_get_addr_opt_
8383 ? elfcpp::PPC64_OPT_TLS
: 0)));
8387 // Emit any relocs we saved in an attempt to avoid generating COPY
8389 if (this->copy_relocs_
.any_saved_relocs())
8390 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
8393 // Emit any saved relocs, and mark toc entries using any of these
8394 // relocs as not optimizable.
8396 template<int sh_type
, int size
, bool big_endian
>
8398 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
8399 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
8402 && parameters
->options().toc_optimize())
8404 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8405 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8406 p
!= this->entries_
.end();
8409 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
8412 // If the symbol is no longer defined in a dynamic object,
8413 // then we emitted a COPY relocation. If it is still
8414 // dynamic then we'll need dynamic relocations and thus
8415 // can't optimize toc entries.
8416 if (entry
.sym_
->is_from_dynobj())
8418 Powerpc_relobj
<size
, big_endian
>* ppc_object
8419 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
8420 if (entry
.shndx_
== ppc_object
->toc_shndx())
8421 ppc_object
->set_no_toc_opt(entry
.address_
);
8426 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
8429 // Return the value to use for a branch relocation.
8431 template<int size
, bool big_endian
>
8433 Target_powerpc
<size
, big_endian
>::symval_for_branch(
8434 const Symbol_table
* symtab
,
8435 const Sized_symbol
<size
>* gsym
,
8436 Powerpc_relobj
<size
, big_endian
>* object
,
8438 unsigned int *dest_shndx
)
8440 if (size
== 32 || this->abiversion() >= 2)
8444 // If the symbol is defined in an opd section, ie. is a function
8445 // descriptor, use the function descriptor code entry address
8446 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
8448 && (gsym
->source() != Symbol::FROM_OBJECT
8449 || gsym
->object()->is_dynamic()))
8452 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
8453 unsigned int shndx
= symobj
->opd_shndx();
8456 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
8457 if (opd_addr
== invalid_address
)
8459 opd_addr
+= symobj
->output_section_address(shndx
);
8460 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
8463 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
8464 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
8467 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
8468 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
8469 *dest_shndx
= folded
.second
;
8471 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
8472 if (sec_addr
== invalid_address
)
8475 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
8476 *value
= sec_addr
+ sec_off
;
8481 // Perform a relocation.
8483 template<int size
, bool big_endian
>
8485 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
8486 const Relocate_info
<size
, big_endian
>* relinfo
,
8488 Target_powerpc
* target
,
8491 const unsigned char* preloc
,
8492 const Sized_symbol
<size
>* gsym
,
8493 const Symbol_value
<size
>* psymval
,
8494 unsigned char* view
,
8496 section_size_type view_size
)
8501 if (target
->replace_tls_get_addr(gsym
))
8502 gsym
= static_cast<const Sized_symbol
<size
>*>(target
->tls_get_addr_opt());
8504 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
8505 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
8506 switch (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
))
8508 case Track_tls::NOT_EXPECTED
:
8509 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8510 _("__tls_get_addr call lacks marker reloc"));
8512 case Track_tls::EXPECTED
:
8513 // We have already complained.
8515 case Track_tls::SKIP
:
8517 case Track_tls::NORMAL
:
8521 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8522 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8523 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8524 // Offset from start of insn to d-field reloc.
8525 const int d_offset
= big_endian
? 2 : 0;
8527 Powerpc_relobj
<size
, big_endian
>* const object
8528 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8530 bool has_stub_value
= false;
8531 bool localentry0
= false;
8532 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8535 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8536 : object
->local_has_plt_offset(r_sym
));
8538 && !is_plt16_reloc
<size
>(r_type
)
8539 && (!psymval
->is_ifunc_symbol()
8540 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8544 && target
->abiversion() >= 2
8545 && !parameters
->options().output_is_position_independent()
8546 && !is_branch_reloc(r_type
))
8548 Address off
= target
->glink_section()->find_global_entry(gsym
);
8549 if (off
!= invalid_address
)
8551 value
= target
->glink_section()->global_entry_address() + off
;
8552 has_stub_value
= true;
8557 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
8558 if (target
->stub_tables().size() == 1)
8559 stub_table
= target
->stub_tables()[0];
8560 if (stub_table
== NULL
8563 && !parameters
->options().output_is_position_independent()
8564 && !is_branch_reloc(r_type
)))
8565 stub_table
= object
->stub_table(relinfo
->data_shndx
);
8566 if (stub_table
== NULL
)
8568 // This is a ref from a data section to an ifunc symbol,
8569 // or a non-branch reloc for which we always want to use
8570 // one set of stubs for resolving function addresses.
8571 if (target
->stub_tables().size() != 0)
8572 stub_table
= target
->stub_tables()[0];
8574 if (stub_table
!= NULL
)
8576 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8578 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8579 rela
.get_r_addend());
8581 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8582 rela
.get_r_addend());
8585 value
= stub_table
->stub_address() + ent
->off_
;
8586 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8587 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8588 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8591 && relnum
+ 1 < reloc_count
)
8593 Reltype
next_rela(preloc
+ reloc_size
);
8594 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8595 == elfcpp::R_PPC64_TOCSAVE
8596 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8599 localentry0
= ent
->localentry0_
;
8600 has_stub_value
= true;
8604 // We don't care too much about bogus debug references to
8605 // non-local functions, but otherwise there had better be a plt
8606 // call stub or global entry stub as appropriate.
8607 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
8610 if (has_plt_offset
&& is_plt16_reloc
<size
>(r_type
))
8612 const Output_data_plt_powerpc
<size
, big_endian
>* plt
;
8614 value
= target
->plt_off(gsym
, &plt
);
8616 value
= target
->plt_off(object
, r_sym
, &plt
);
8617 value
+= plt
->address();
8620 value
-= (target
->got_section()->output_section()->address()
8621 + object
->toc_base_offset());
8622 else if (parameters
->options().output_is_position_independent())
8624 if (rela
.get_r_addend() >= 32768)
8626 unsigned int got2
= object
->got2_shndx();
8627 value
-= (object
->get_output_section_offset(got2
)
8628 + object
->output_section(got2
)->address()
8629 + rela
.get_r_addend());
8632 value
-= (target
->got_section()->address()
8633 + target
->got_section()->g_o_t());
8636 else if (r_type
== elfcpp::R_POWERPC_GOT16
8637 || r_type
== elfcpp::R_POWERPC_GOT16_LO
8638 || r_type
== elfcpp::R_POWERPC_GOT16_HI
8639 || r_type
== elfcpp::R_POWERPC_GOT16_HA
8640 || r_type
== elfcpp::R_PPC64_GOT16_DS
8641 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
8645 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
8646 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
8650 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
8651 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
8653 value
-= target
->got_section()->got_base_offset(object
);
8655 else if (r_type
== elfcpp::R_PPC64_TOC
)
8657 value
= (target
->got_section()->output_section()->address()
8658 + object
->toc_base_offset());
8660 else if (gsym
!= NULL
8661 && (r_type
== elfcpp::R_POWERPC_REL24
8662 || r_type
== elfcpp::R_PPC_PLTREL24
)
8667 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
8668 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
8669 bool can_plt_call
= localentry0
|| target
->is_tls_get_addr_opt(gsym
);
8670 if (!can_plt_call
&& rela
.get_r_offset() + 8 <= view_size
)
8672 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
8673 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
8676 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
8678 elfcpp::Swap
<32, big_endian
>::
8679 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
8680 can_plt_call
= true;
8685 // If we don't have a branch and link followed by a nop,
8686 // we can't go via the plt because there is no place to
8687 // put a toc restoring instruction.
8688 // Unless we know we won't be returning.
8689 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
8690 can_plt_call
= true;
8694 // g++ as of 20130507 emits self-calls without a
8695 // following nop. This is arguably wrong since we have
8696 // conflicting information. On the one hand a global
8697 // symbol and on the other a local call sequence, but
8698 // don't error for this special case.
8699 // It isn't possible to cheaply verify we have exactly
8700 // such a call. Allow all calls to the same section.
8702 Address code
= value
;
8703 if (gsym
->source() == Symbol::FROM_OBJECT
8704 && gsym
->object() == object
)
8706 unsigned int dest_shndx
= 0;
8707 if (target
->abiversion() < 2)
8709 Address addend
= rela
.get_r_addend();
8710 code
= psymval
->value(object
, addend
);
8711 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8712 &code
, &dest_shndx
);
8715 if (dest_shndx
== 0)
8716 dest_shndx
= gsym
->shndx(&is_ordinary
);
8717 ok
= dest_shndx
== relinfo
->data_shndx
;
8721 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8722 _("call lacks nop, can't restore toc; "
8723 "recompile with -fPIC"));
8729 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8730 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8731 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8732 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8734 // First instruction of a global dynamic sequence, arg setup insn.
8735 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8736 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8737 enum Got_type got_type
= GOT_TYPE_STANDARD
;
8738 if (tls_type
== tls::TLSOPT_NONE
)
8739 got_type
= GOT_TYPE_TLSGD
;
8740 else if (tls_type
== tls::TLSOPT_TO_IE
)
8741 got_type
= GOT_TYPE_TPREL
;
8742 if (got_type
!= GOT_TYPE_STANDARD
)
8746 gold_assert(gsym
->has_got_offset(got_type
));
8747 value
= gsym
->got_offset(got_type
);
8751 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
8752 value
= object
->local_got_offset(r_sym
, got_type
);
8754 value
-= target
->got_section()->got_base_offset(object
);
8756 if (tls_type
== tls::TLSOPT_TO_IE
)
8758 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8759 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8761 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8762 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8763 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
8765 insn
|= 32 << 26; // lwz
8767 insn
|= 58 << 26; // ld
8768 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8770 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8771 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8773 else if (tls_type
== tls::TLSOPT_TO_LE
)
8775 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8776 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8778 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8779 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8780 insn
&= (1 << 26) - (1 << 21); // extract rt
8785 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8786 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8787 value
= psymval
->value(object
, rela
.get_r_addend());
8791 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8793 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8794 r_type
= elfcpp::R_POWERPC_NONE
;
8798 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8799 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8800 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8801 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8803 // First instruction of a local dynamic sequence, arg setup insn.
8804 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8805 if (tls_type
== tls::TLSOPT_NONE
)
8807 value
= target
->tlsld_got_offset();
8808 value
-= target
->got_section()->got_base_offset(object
);
8812 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8813 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8814 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8816 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8817 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8818 insn
&= (1 << 26) - (1 << 21); // extract rt
8823 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8824 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8829 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8831 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8832 r_type
= elfcpp::R_POWERPC_NONE
;
8836 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
8837 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
8838 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
8839 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
8841 // Accesses relative to a local dynamic sequence address,
8842 // no optimisation here.
8845 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
8846 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
8850 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
8851 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
8853 value
-= target
->got_section()->got_base_offset(object
);
8855 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8856 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8857 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8858 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8860 // First instruction of initial exec sequence.
8861 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8862 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8863 if (tls_type
== tls::TLSOPT_NONE
)
8867 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
8868 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
8872 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
8873 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
8875 value
-= target
->got_section()->got_base_offset(object
);
8879 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8880 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8881 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8883 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8884 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8885 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
8890 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8891 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8892 value
= psymval
->value(object
, rela
.get_r_addend());
8896 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8898 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8899 r_type
= elfcpp::R_POWERPC_NONE
;
8903 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8904 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8906 // Second instruction of a global dynamic sequence,
8907 // the __tls_get_addr call
8908 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8909 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8910 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8911 if (tls_type
!= tls::TLSOPT_NONE
)
8913 if (tls_type
== tls::TLSOPT_TO_IE
)
8915 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8916 Insn insn
= add_3_3_13
;
8919 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8920 r_type
= elfcpp::R_POWERPC_NONE
;
8924 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8925 Insn insn
= addi_3_3
;
8926 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8927 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8929 value
= psymval
->value(object
, rela
.get_r_addend());
8931 this->skip_next_tls_get_addr_call();
8934 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8935 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8937 // Second instruction of a local dynamic sequence,
8938 // the __tls_get_addr call
8939 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8940 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8941 if (tls_type
== tls::TLSOPT_TO_LE
)
8943 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8944 Insn insn
= addi_3_3
;
8945 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8946 this->skip_next_tls_get_addr_call();
8947 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8952 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8954 // Second instruction of an initial exec sequence
8955 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8956 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8957 if (tls_type
== tls::TLSOPT_TO_LE
)
8959 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8960 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8961 unsigned int reg
= size
== 32 ? 2 : 13;
8962 insn
= at_tls_transform(insn
, reg
);
8963 gold_assert(insn
!= 0);
8964 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8965 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8967 value
= psymval
->value(object
, rela
.get_r_addend());
8970 else if (!has_stub_value
)
8974 && (r_type
== elfcpp::R_PPC_PLTREL24
8975 || r_type
== elfcpp::R_POWERPC_PLT16_LO
8976 || r_type
== elfcpp::R_POWERPC_PLT16_HI
8977 || r_type
== elfcpp::R_POWERPC_PLT16_HA
)))
8978 addend
= rela
.get_r_addend();
8979 value
= psymval
->value(object
, addend
);
8980 if (size
== 64 && is_branch_reloc(r_type
))
8982 if (target
->abiversion() >= 2)
8985 value
+= object
->ppc64_local_entry_offset(gsym
);
8987 value
+= object
->ppc64_local_entry_offset(r_sym
);
8991 unsigned int dest_shndx
;
8992 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8993 &value
, &dest_shndx
);
8996 Address max_branch_offset
= max_branch_delta(r_type
);
8997 if (max_branch_offset
!= 0
8998 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
9000 Stub_table
<size
, big_endian
>* stub_table
9001 = object
->stub_table(relinfo
->data_shndx
);
9002 if (stub_table
!= NULL
)
9004 Address off
= stub_table
->find_long_branch_entry(object
, value
);
9005 if (off
!= invalid_address
)
9007 value
= (stub_table
->stub_address() + stub_table
->plt_size()
9009 has_stub_value
= true;
9017 case elfcpp::R_PPC64_REL64
:
9018 case elfcpp::R_POWERPC_REL32
:
9019 case elfcpp::R_POWERPC_REL24
:
9020 case elfcpp::R_PPC_PLTREL24
:
9021 case elfcpp::R_PPC_LOCAL24PC
:
9022 case elfcpp::R_POWERPC_REL16
:
9023 case elfcpp::R_POWERPC_REL16_LO
:
9024 case elfcpp::R_POWERPC_REL16_HI
:
9025 case elfcpp::R_POWERPC_REL16_HA
:
9026 case elfcpp::R_POWERPC_REL16DX_HA
:
9027 case elfcpp::R_POWERPC_REL14
:
9028 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9029 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9033 case elfcpp::R_PPC64_TOC16
:
9034 case elfcpp::R_PPC64_TOC16_LO
:
9035 case elfcpp::R_PPC64_TOC16_HI
:
9036 case elfcpp::R_PPC64_TOC16_HA
:
9037 case elfcpp::R_PPC64_TOC16_DS
:
9038 case elfcpp::R_PPC64_TOC16_LO_DS
:
9039 // Subtract the TOC base address.
9040 value
-= (target
->got_section()->output_section()->address()
9041 + object
->toc_base_offset());
9044 case elfcpp::R_POWERPC_SECTOFF
:
9045 case elfcpp::R_POWERPC_SECTOFF_LO
:
9046 case elfcpp::R_POWERPC_SECTOFF_HI
:
9047 case elfcpp::R_POWERPC_SECTOFF_HA
:
9048 case elfcpp::R_PPC64_SECTOFF_DS
:
9049 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9051 value
-= os
->address();
9054 case elfcpp::R_PPC64_TPREL16_DS
:
9055 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9056 case elfcpp::R_PPC64_TPREL16_HIGH
:
9057 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9059 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
9062 case elfcpp::R_POWERPC_TPREL16
:
9063 case elfcpp::R_POWERPC_TPREL16_LO
:
9064 case elfcpp::R_POWERPC_TPREL16_HI
:
9065 case elfcpp::R_POWERPC_TPREL16_HA
:
9066 case elfcpp::R_POWERPC_TPREL
:
9067 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9068 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9069 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9070 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9071 // tls symbol values are relative to tls_segment()->vaddr()
9075 case elfcpp::R_PPC64_DTPREL16_DS
:
9076 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9077 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9078 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9079 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9080 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9082 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
9083 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
9086 case elfcpp::R_POWERPC_DTPREL16
:
9087 case elfcpp::R_POWERPC_DTPREL16_LO
:
9088 case elfcpp::R_POWERPC_DTPREL16_HI
:
9089 case elfcpp::R_POWERPC_DTPREL16_HA
:
9090 case elfcpp::R_POWERPC_DTPREL
:
9091 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9092 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9093 // tls symbol values are relative to tls_segment()->vaddr()
9094 value
-= dtp_offset
;
9097 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9099 value
+= object
->ppc64_local_entry_offset(gsym
);
9101 value
+= object
->ppc64_local_entry_offset(r_sym
);
9108 Insn branch_bit
= 0;
9111 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9112 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9113 branch_bit
= 1 << 21;
9115 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9116 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9118 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9119 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9122 if (this->is_isa_v2
)
9124 // Set 'a' bit. This is 0b00010 in BO field for branch
9125 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
9126 // for branch on CTR insns (BO == 1a00t or 1a01t).
9127 if ((insn
& (0x14 << 21)) == (0x04 << 21))
9129 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
9136 // Invert 'y' bit if not the default.
9137 if (static_cast<Signed_address
>(value
) < 0)
9140 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9144 case elfcpp::R_POWERPC_PLT16_HA
:
9146 && !parameters
->options().output_is_position_independent())
9148 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9149 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9151 // Convert addis to lis.
9152 if ((insn
& (0x3f << 26)) == 15u << 26
9153 && (insn
& (0x1f << 16)) != 0)
9155 insn
&= ~(0x1f << 16);
9156 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9172 // Multi-instruction sequences that access the GOT/TOC can
9173 // be optimized, eg.
9174 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
9175 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
9177 // addis ra,r2,0; addi rb,ra,x@toc@l;
9178 // to nop; addi rb,r2,x@toc;
9179 // FIXME: the @got sequence shown above is not yet
9180 // optimized. Note that gcc as of 2017-01-07 doesn't use
9181 // the ELF @got relocs except for TLS, instead using the
9182 // PowerOpen variant of a compiler managed GOT (called TOC).
9183 // The PowerOpen TOC sequence equivalent to the first
9184 // example is optimized.
9185 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9186 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9187 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9188 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9189 case elfcpp::R_POWERPC_GOT16_HA
:
9190 case elfcpp::R_PPC64_TOC16_HA
:
9191 if (parameters
->options().toc_optimize())
9193 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9194 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9195 if (r_type
== elfcpp::R_PPC64_TOC16_HA
9196 && object
->make_toc_relative(target
, &value
))
9198 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
9199 == ((15u << 26) | (2 << 16)));
9201 if (((insn
& ((0x3f << 26) | 0x1f << 16))
9202 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
9203 && value
+ 0x8000 < 0x10000)
9205 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9211 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9212 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9213 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9214 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9215 case elfcpp::R_POWERPC_GOT16_LO
:
9216 case elfcpp::R_PPC64_GOT16_LO_DS
:
9217 case elfcpp::R_PPC64_TOC16_LO
:
9218 case elfcpp::R_PPC64_TOC16_LO_DS
:
9219 if (parameters
->options().toc_optimize())
9221 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9222 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9223 bool changed
= false;
9224 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
9225 && object
->make_toc_relative(target
, &value
))
9227 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
9228 insn
^= (14u << 26) ^ (58u << 26);
9229 r_type
= elfcpp::R_PPC64_TOC16_LO
;
9232 if (ok_lo_toc_insn(insn
, r_type
)
9233 && value
+ 0x8000 < 0x10000)
9235 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
9237 // Transform addic to addi when we change reg.
9238 insn
&= ~((0x3f << 26) | (0x1f << 16));
9239 insn
|= (14u << 26) | (2 << 16);
9243 insn
&= ~(0x1f << 16);
9249 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9253 case elfcpp::R_POWERPC_TPREL16_HA
:
9254 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9256 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9257 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9258 if ((insn
& ((0x3f << 26) | 0x1f << 16))
9259 != ((15u << 26) | ((size
== 32 ? 2 : 13) << 16)))
9263 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9269 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9271 // R_PPC_TLSGD, R_PPC_TLSLD
9274 case elfcpp::R_POWERPC_TPREL16_LO
:
9275 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9277 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9278 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9279 insn
&= ~(0x1f << 16);
9280 insn
|= (size
== 32 ? 2 : 13) << 16;
9281 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9285 case elfcpp::R_PPC64_ENTRY
:
9286 value
= (target
->got_section()->output_section()->address()
9287 + object
->toc_base_offset());
9288 if (value
+ 0x80008000 <= 0xffffffff
9289 && !parameters
->options().output_is_position_independent())
9291 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9292 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9293 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9295 if ((insn1
& ~0xfffc) == ld_2_12
9296 && insn2
== add_2_2_12
)
9298 insn1
= lis_2
+ ha(value
);
9299 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9300 insn2
= addi_2_2
+ l(value
);
9301 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9308 if (value
+ 0x80008000 <= 0xffffffff)
9310 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9311 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9312 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9314 if ((insn1
& ~0xfffc) == ld_2_12
9315 && insn2
== add_2_2_12
)
9317 insn1
= addis_2_12
+ ha(value
);
9318 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9319 insn2
= addi_2_2
+ l(value
);
9320 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9327 case elfcpp::R_POWERPC_REL16_LO
:
9328 // If we are generating a non-PIC executable, edit
9329 // 0: addis 2,12,.TOC.-0b@ha
9330 // addi 2,2,.TOC.-0b@l
9331 // used by ELFv2 global entry points to set up r2, to
9334 // if .TOC. is in range. */
9335 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
9338 && target
->abiversion() >= 2
9339 && !parameters
->options().output_is_position_independent()
9340 && rela
.get_r_addend() == d_offset
+ 4
9342 && strcmp(gsym
->name(), ".TOC.") == 0)
9344 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9345 Reltype
prev_rela(preloc
- reloc_size
);
9346 if ((prev_rela
.get_r_info()
9347 == elfcpp::elf_r_info
<size
>(r_sym
,
9348 elfcpp::R_POWERPC_REL16_HA
))
9349 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
9350 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
9352 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9353 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
9354 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9356 if ((insn1
& 0xffff0000) == addis_2_12
9357 && (insn2
& 0xffff0000) == addi_2_2
)
9359 insn1
= lis_2
+ ha(value
+ address
- 4);
9360 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
9361 insn2
= addi_2_2
+ l(value
+ address
- 4);
9362 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
9365 relinfo
->rr
->set_strategy(relnum
- 1,
9366 Relocatable_relocs::RELOC_SPECIAL
);
9367 relinfo
->rr
->set_strategy(relnum
,
9368 Relocatable_relocs::RELOC_SPECIAL
);
9378 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
9379 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
9382 case elfcpp::R_POWERPC_ADDR32
:
9383 case elfcpp::R_POWERPC_UADDR32
:
9385 overflow
= Reloc::CHECK_BITFIELD
;
9388 case elfcpp::R_POWERPC_REL32
:
9389 case elfcpp::R_POWERPC_REL16DX_HA
:
9391 overflow
= Reloc::CHECK_SIGNED
;
9394 case elfcpp::R_POWERPC_UADDR16
:
9395 overflow
= Reloc::CHECK_BITFIELD
;
9398 case elfcpp::R_POWERPC_ADDR16
:
9399 // We really should have three separate relocations,
9400 // one for 16-bit data, one for insns with 16-bit signed fields,
9401 // and one for insns with 16-bit unsigned fields.
9402 overflow
= Reloc::CHECK_BITFIELD
;
9403 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
9404 overflow
= Reloc::CHECK_LOW_INSN
;
9407 case elfcpp::R_POWERPC_ADDR16_HI
:
9408 case elfcpp::R_POWERPC_ADDR16_HA
:
9409 case elfcpp::R_POWERPC_GOT16_HI
:
9410 case elfcpp::R_POWERPC_GOT16_HA
:
9411 case elfcpp::R_POWERPC_PLT16_HI
:
9412 case elfcpp::R_POWERPC_PLT16_HA
:
9413 case elfcpp::R_POWERPC_SECTOFF_HI
:
9414 case elfcpp::R_POWERPC_SECTOFF_HA
:
9415 case elfcpp::R_PPC64_TOC16_HI
:
9416 case elfcpp::R_PPC64_TOC16_HA
:
9417 case elfcpp::R_PPC64_PLTGOT16_HI
:
9418 case elfcpp::R_PPC64_PLTGOT16_HA
:
9419 case elfcpp::R_POWERPC_TPREL16_HI
:
9420 case elfcpp::R_POWERPC_TPREL16_HA
:
9421 case elfcpp::R_POWERPC_DTPREL16_HI
:
9422 case elfcpp::R_POWERPC_DTPREL16_HA
:
9423 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9424 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9425 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9426 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9427 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9428 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9429 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9430 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9431 case elfcpp::R_POWERPC_REL16_HI
:
9432 case elfcpp::R_POWERPC_REL16_HA
:
9434 overflow
= Reloc::CHECK_HIGH_INSN
;
9437 case elfcpp::R_POWERPC_REL16
:
9438 case elfcpp::R_PPC64_TOC16
:
9439 case elfcpp::R_POWERPC_GOT16
:
9440 case elfcpp::R_POWERPC_SECTOFF
:
9441 case elfcpp::R_POWERPC_TPREL16
:
9442 case elfcpp::R_POWERPC_DTPREL16
:
9443 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9444 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9445 case elfcpp::R_POWERPC_GOT_TPREL16
:
9446 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9447 overflow
= Reloc::CHECK_LOW_INSN
;
9450 case elfcpp::R_POWERPC_ADDR24
:
9451 case elfcpp::R_POWERPC_ADDR14
:
9452 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9453 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9454 case elfcpp::R_PPC64_ADDR16_DS
:
9455 case elfcpp::R_POWERPC_REL24
:
9456 case elfcpp::R_PPC_PLTREL24
:
9457 case elfcpp::R_PPC_LOCAL24PC
:
9458 case elfcpp::R_PPC64_TPREL16_DS
:
9459 case elfcpp::R_PPC64_DTPREL16_DS
:
9460 case elfcpp::R_PPC64_TOC16_DS
:
9461 case elfcpp::R_PPC64_GOT16_DS
:
9462 case elfcpp::R_PPC64_SECTOFF_DS
:
9463 case elfcpp::R_POWERPC_REL14
:
9464 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9465 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9466 overflow
= Reloc::CHECK_SIGNED
;
9470 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9473 if (overflow
== Reloc::CHECK_LOW_INSN
9474 || overflow
== Reloc::CHECK_HIGH_INSN
)
9476 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9478 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
9479 overflow
= Reloc::CHECK_BITFIELD
;
9480 else if (overflow
== Reloc::CHECK_LOW_INSN
9481 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
9482 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
9483 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
9484 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
9485 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
9486 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
9487 overflow
= Reloc::CHECK_UNSIGNED
;
9489 overflow
= Reloc::CHECK_SIGNED
;
9492 bool maybe_dq_reloc
= false;
9493 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
9494 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
9497 case elfcpp::R_POWERPC_NONE
:
9498 case elfcpp::R_POWERPC_TLS
:
9499 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
9500 case elfcpp::R_POWERPC_GNU_VTENTRY
:
9503 case elfcpp::R_PPC64_ADDR64
:
9504 case elfcpp::R_PPC64_REL64
:
9505 case elfcpp::R_PPC64_TOC
:
9506 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9507 Reloc::addr64(view
, value
);
9510 case elfcpp::R_POWERPC_TPREL
:
9511 case elfcpp::R_POWERPC_DTPREL
:
9513 Reloc::addr64(view
, value
);
9515 status
= Reloc::addr32(view
, value
, overflow
);
9518 case elfcpp::R_PPC64_UADDR64
:
9519 Reloc::addr64_u(view
, value
);
9522 case elfcpp::R_POWERPC_ADDR32
:
9523 status
= Reloc::addr32(view
, value
, overflow
);
9526 case elfcpp::R_POWERPC_REL32
:
9527 case elfcpp::R_POWERPC_UADDR32
:
9528 status
= Reloc::addr32_u(view
, value
, overflow
);
9531 case elfcpp::R_POWERPC_ADDR24
:
9532 case elfcpp::R_POWERPC_REL24
:
9533 case elfcpp::R_PPC_PLTREL24
:
9534 case elfcpp::R_PPC_LOCAL24PC
:
9535 status
= Reloc::addr24(view
, value
, overflow
);
9538 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9539 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9540 case elfcpp::R_POWERPC_GOT_TPREL16
:
9541 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9544 // On ppc64 these are all ds form
9545 maybe_dq_reloc
= true;
9549 case elfcpp::R_POWERPC_ADDR16
:
9550 case elfcpp::R_POWERPC_REL16
:
9551 case elfcpp::R_PPC64_TOC16
:
9552 case elfcpp::R_POWERPC_GOT16
:
9553 case elfcpp::R_POWERPC_SECTOFF
:
9554 case elfcpp::R_POWERPC_TPREL16
:
9555 case elfcpp::R_POWERPC_DTPREL16
:
9556 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9557 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9558 case elfcpp::R_POWERPC_ADDR16_LO
:
9559 case elfcpp::R_POWERPC_REL16_LO
:
9560 case elfcpp::R_PPC64_TOC16_LO
:
9561 case elfcpp::R_POWERPC_GOT16_LO
:
9562 case elfcpp::R_POWERPC_PLT16_LO
:
9563 case elfcpp::R_POWERPC_SECTOFF_LO
:
9564 case elfcpp::R_POWERPC_TPREL16_LO
:
9565 case elfcpp::R_POWERPC_DTPREL16_LO
:
9566 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9567 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9569 status
= Reloc::addr16(view
, value
, overflow
);
9571 maybe_dq_reloc
= true;
9574 case elfcpp::R_POWERPC_UADDR16
:
9575 status
= Reloc::addr16_u(view
, value
, overflow
);
9578 case elfcpp::R_PPC64_ADDR16_HIGH
:
9579 case elfcpp::R_PPC64_TPREL16_HIGH
:
9580 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9582 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
9585 case elfcpp::R_POWERPC_ADDR16_HI
:
9586 case elfcpp::R_POWERPC_REL16_HI
:
9587 case elfcpp::R_PPC64_TOC16_HI
:
9588 case elfcpp::R_POWERPC_GOT16_HI
:
9589 case elfcpp::R_POWERPC_PLT16_HI
:
9590 case elfcpp::R_POWERPC_SECTOFF_HI
:
9591 case elfcpp::R_POWERPC_TPREL16_HI
:
9592 case elfcpp::R_POWERPC_DTPREL16_HI
:
9593 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9594 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9595 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9596 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9597 Reloc::addr16_hi(view
, value
);
9600 case elfcpp::R_PPC64_ADDR16_HIGHA
:
9601 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9602 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9604 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
9607 case elfcpp::R_POWERPC_ADDR16_HA
:
9608 case elfcpp::R_POWERPC_REL16_HA
:
9609 case elfcpp::R_PPC64_TOC16_HA
:
9610 case elfcpp::R_POWERPC_GOT16_HA
:
9611 case elfcpp::R_POWERPC_PLT16_HA
:
9612 case elfcpp::R_POWERPC_SECTOFF_HA
:
9613 case elfcpp::R_POWERPC_TPREL16_HA
:
9614 case elfcpp::R_POWERPC_DTPREL16_HA
:
9615 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9616 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9617 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9618 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9619 Reloc::addr16_ha(view
, value
);
9622 case elfcpp::R_POWERPC_REL16DX_HA
:
9623 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
9626 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9628 // R_PPC_EMB_NADDR16_LO
9631 case elfcpp::R_PPC64_ADDR16_HIGHER
:
9632 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9633 Reloc::addr16_hi2(view
, value
);
9636 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9638 // R_PPC_EMB_NADDR16_HI
9641 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
9642 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9643 Reloc::addr16_ha2(view
, value
);
9646 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9648 // R_PPC_EMB_NADDR16_HA
9651 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
9652 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9653 Reloc::addr16_hi3(view
, value
);
9656 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9661 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
9662 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9663 Reloc::addr16_ha3(view
, value
);
9666 case elfcpp::R_PPC64_DTPREL16_DS
:
9667 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9669 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9672 case elfcpp::R_PPC64_TPREL16_DS
:
9673 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9675 // R_PPC_TLSGD, R_PPC_TLSLD
9678 case elfcpp::R_PPC64_ADDR16_DS
:
9679 case elfcpp::R_PPC64_ADDR16_LO_DS
:
9680 case elfcpp::R_PPC64_TOC16_DS
:
9681 case elfcpp::R_PPC64_TOC16_LO_DS
:
9682 case elfcpp::R_PPC64_GOT16_DS
:
9683 case elfcpp::R_PPC64_GOT16_LO_DS
:
9684 case elfcpp::R_PPC64_PLT16_LO_DS
:
9685 case elfcpp::R_PPC64_SECTOFF_DS
:
9686 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9687 maybe_dq_reloc
= true;
9690 case elfcpp::R_POWERPC_ADDR14
:
9691 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9692 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9693 case elfcpp::R_POWERPC_REL14
:
9694 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9695 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9696 status
= Reloc::addr14(view
, value
, overflow
);
9699 case elfcpp::R_POWERPC_COPY
:
9700 case elfcpp::R_POWERPC_GLOB_DAT
:
9701 case elfcpp::R_POWERPC_JMP_SLOT
:
9702 case elfcpp::R_POWERPC_RELATIVE
:
9703 case elfcpp::R_POWERPC_DTPMOD
:
9704 case elfcpp::R_PPC64_JMP_IREL
:
9705 case elfcpp::R_POWERPC_IRELATIVE
:
9706 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9707 _("unexpected reloc %u in object file"),
9711 case elfcpp::R_PPC64_TOCSAVE
:
9717 Symbol_location loc
;
9718 loc
.object
= relinfo
->object
;
9719 loc
.shndx
= relinfo
->data_shndx
;
9720 loc
.offset
= rela
.get_r_offset();
9721 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
9722 if (p
!= target
->tocsave_loc().end())
9724 // If we've generated plt calls using this tocsave, then
9725 // the nop needs to be changed to save r2.
9726 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9727 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
9728 elfcpp::Swap
<32, big_endian
>::
9729 writeval(iview
, std_2_1
+ target
->stk_toc());
9734 case elfcpp::R_PPC_EMB_SDA2I16
:
9735 case elfcpp::R_PPC_EMB_SDA2REL
:
9738 // R_PPC64_TLSGD, R_PPC64_TLSLD
9741 case elfcpp::R_POWERPC_PLT32
:
9742 case elfcpp::R_POWERPC_PLTREL32
:
9743 case elfcpp::R_PPC_SDAREL16
:
9744 case elfcpp::R_POWERPC_ADDR30
:
9745 case elfcpp::R_PPC64_PLT64
:
9746 case elfcpp::R_PPC64_PLTREL64
:
9747 case elfcpp::R_PPC64_PLTGOT16
:
9748 case elfcpp::R_PPC64_PLTGOT16_LO
:
9749 case elfcpp::R_PPC64_PLTGOT16_HI
:
9750 case elfcpp::R_PPC64_PLTGOT16_HA
:
9751 case elfcpp::R_PPC64_PLTGOT16_DS
:
9752 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
9753 case elfcpp::R_PPC_EMB_RELSDA
:
9754 case elfcpp::R_PPC_TOC16
:
9757 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9758 _("unsupported reloc %u"),
9766 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9768 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
9769 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9770 && (insn
& 3) == 1))
9771 status
= Reloc::addr16_dq(view
, value
, overflow
);
9773 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9774 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9775 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
9776 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
9777 status
= Reloc::addr16_ds(view
, value
, overflow
);
9779 status
= Reloc::addr16(view
, value
, overflow
);
9782 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
9785 && gsym
->is_undefined()
9786 && is_branch_reloc(r_type
))))
9788 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9789 _("relocation overflow"));
9791 gold_info(_("try relinking with a smaller --stub-group-size"));
9797 // Relocate section data.
9799 template<int size
, bool big_endian
>
9801 Target_powerpc
<size
, big_endian
>::relocate_section(
9802 const Relocate_info
<size
, big_endian
>* relinfo
,
9803 unsigned int sh_type
,
9804 const unsigned char* prelocs
,
9806 Output_section
* output_section
,
9807 bool needs_special_offset_handling
,
9808 unsigned char* view
,
9810 section_size_type view_size
,
9811 const Reloc_symbol_changes
* reloc_symbol_changes
)
9813 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
9814 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
9815 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
9816 Powerpc_comdat_behavior
;
9817 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9820 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9822 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
9823 Powerpc_comdat_behavior
, Classify_reloc
>(
9829 needs_special_offset_handling
,
9833 reloc_symbol_changes
);
9836 template<int size
, bool big_endian
>
9837 class Powerpc_scan_relocatable_reloc
9840 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9841 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9842 static const int sh_type
= elfcpp::SHT_RELA
;
9844 // Return the symbol referred to by the relocation.
9845 static inline unsigned int
9846 get_r_sym(const Reltype
* reloc
)
9847 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
9849 // Return the type of the relocation.
9850 static inline unsigned int
9851 get_r_type(const Reltype
* reloc
)
9852 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
9854 // Return the strategy to use for a local symbol which is not a
9855 // section symbol, given the relocation type.
9856 inline Relocatable_relocs::Reloc_strategy
9857 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
9859 if (r_type
== 0 && r_sym
== 0)
9860 return Relocatable_relocs::RELOC_DISCARD
;
9861 return Relocatable_relocs::RELOC_COPY
;
9864 // Return the strategy to use for a local symbol which is a section
9865 // symbol, given the relocation type.
9866 inline Relocatable_relocs::Reloc_strategy
9867 local_section_strategy(unsigned int, Relobj
*)
9869 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
9872 // Return the strategy to use for a global symbol, given the
9873 // relocation type, the object, and the symbol index.
9874 inline Relocatable_relocs::Reloc_strategy
9875 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
9878 && (r_type
== elfcpp::R_PPC_PLTREL24
9879 || r_type
== elfcpp::R_POWERPC_PLT16_LO
9880 || r_type
== elfcpp::R_POWERPC_PLT16_HI
9881 || r_type
== elfcpp::R_POWERPC_PLT16_HA
))
9882 return Relocatable_relocs::RELOC_SPECIAL
;
9883 return Relocatable_relocs::RELOC_COPY
;
9887 // Scan the relocs during a relocatable link.
9889 template<int size
, bool big_endian
>
9891 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
9892 Symbol_table
* symtab
,
9894 Sized_relobj_file
<size
, big_endian
>* object
,
9895 unsigned int data_shndx
,
9896 unsigned int sh_type
,
9897 const unsigned char* prelocs
,
9899 Output_section
* output_section
,
9900 bool needs_special_offset_handling
,
9901 size_t local_symbol_count
,
9902 const unsigned char* plocal_symbols
,
9903 Relocatable_relocs
* rr
)
9905 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
9907 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9909 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
9917 needs_special_offset_handling
,
9923 // Scan the relocs for --emit-relocs.
9925 template<int size
, bool big_endian
>
9927 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
9928 Symbol_table
* symtab
,
9930 Sized_relobj_file
<size
, big_endian
>* object
,
9931 unsigned int data_shndx
,
9932 unsigned int sh_type
,
9933 const unsigned char* prelocs
,
9935 Output_section
* output_section
,
9936 bool needs_special_offset_handling
,
9937 size_t local_symbol_count
,
9938 const unsigned char* plocal_syms
,
9939 Relocatable_relocs
* rr
)
9941 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9943 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
9944 Emit_relocs_strategy
;
9946 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9948 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
9956 needs_special_offset_handling
,
9962 // Emit relocations for a section.
9963 // This is a modified version of the function by the same name in
9964 // target-reloc.h. Using relocate_special_relocatable for
9965 // R_PPC_PLTREL24 would require duplication of the entire body of the
9966 // loop, so we may as well duplicate the whole thing.
9968 template<int size
, bool big_endian
>
9970 Target_powerpc
<size
, big_endian
>::relocate_relocs(
9971 const Relocate_info
<size
, big_endian
>* relinfo
,
9972 unsigned int sh_type
,
9973 const unsigned char* prelocs
,
9975 Output_section
* output_section
,
9976 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
9978 Address view_address
,
9980 unsigned char* reloc_view
,
9981 section_size_type reloc_view_size
)
9983 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9985 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9986 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
9987 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9988 // Offset from start of insn to d-field reloc.
9989 const int d_offset
= big_endian
? 2 : 0;
9991 Powerpc_relobj
<size
, big_endian
>* const object
9992 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
9993 const unsigned int local_count
= object
->local_symbol_count();
9994 unsigned int got2_shndx
= object
->got2_shndx();
9995 Address got2_addend
= 0;
9996 if (got2_shndx
!= 0)
9998 got2_addend
= object
->get_output_section_offset(got2_shndx
);
9999 gold_assert(got2_addend
!= invalid_address
);
10002 const bool relocatable
= parameters
->options().relocatable();
10004 unsigned char* pwrite
= reloc_view
;
10005 bool zap_next
= false;
10006 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
10008 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
10009 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
10012 Reltype
reloc(prelocs
);
10013 Reltype_write
reloc_write(pwrite
);
10015 Address offset
= reloc
.get_r_offset();
10016 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
10017 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
10018 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
10019 const unsigned int orig_r_sym
= r_sym
;
10020 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
10021 = reloc
.get_r_addend();
10022 const Symbol
* gsym
= NULL
;
10026 // We could arrange to discard these and other relocs for
10027 // tls optimised sequences in the strategy methods, but for
10028 // now do as BFD ld does.
10029 r_type
= elfcpp::R_POWERPC_NONE
;
10033 // Get the new symbol index.
10034 Output_section
* os
= NULL
;
10035 if (r_sym
< local_count
)
10039 case Relocatable_relocs::RELOC_COPY
:
10040 case Relocatable_relocs::RELOC_SPECIAL
:
10043 r_sym
= object
->symtab_index(r_sym
);
10044 gold_assert(r_sym
!= -1U);
10048 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
10050 // We are adjusting a section symbol. We need to find
10051 // the symbol table index of the section symbol for
10052 // the output section corresponding to input section
10053 // in which this symbol is defined.
10054 gold_assert(r_sym
< local_count
);
10056 unsigned int shndx
=
10057 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
10058 gold_assert(is_ordinary
);
10059 os
= object
->output_section(shndx
);
10060 gold_assert(os
!= NULL
);
10061 gold_assert(os
->needs_symtab_index());
10062 r_sym
= os
->symtab_index();
10067 gold_unreachable();
10072 gsym
= object
->global_symbol(r_sym
);
10073 gold_assert(gsym
!= NULL
);
10074 if (gsym
->is_forwarder())
10075 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
10077 gold_assert(gsym
->has_symtab_index());
10078 r_sym
= gsym
->symtab_index();
10081 // Get the new offset--the location in the output section where
10082 // this relocation should be applied.
10083 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
10084 offset
+= offset_in_output_section
;
10087 section_offset_type sot_offset
=
10088 convert_types
<section_offset_type
, Address
>(offset
);
10089 section_offset_type new_sot_offset
=
10090 output_section
->output_offset(object
, relinfo
->data_shndx
,
10092 gold_assert(new_sot_offset
!= -1);
10093 offset
= new_sot_offset
;
10096 // In an object file, r_offset is an offset within the section.
10097 // In an executable or dynamic object, generated by
10098 // --emit-relocs, r_offset is an absolute address.
10101 offset
+= view_address
;
10102 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
10103 offset
-= offset_in_output_section
;
10106 // Handle the reloc addend based on the strategy.
10107 if (strategy
== Relocatable_relocs::RELOC_COPY
)
10109 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
10111 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
10112 addend
= psymval
->value(object
, addend
);
10113 // In a relocatable link, the symbol value is relative to
10114 // the start of the output section. For a non-relocatable
10115 // link, we need to adjust the addend.
10118 gold_assert(os
!= NULL
);
10119 addend
-= os
->address();
10122 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
10126 if (addend
>= 32768)
10127 addend
+= got2_addend
;
10129 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
10131 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
10132 addend
-= d_offset
;
10134 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
10136 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
10137 addend
-= d_offset
+ 4;
10141 gold_unreachable();
10145 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
10146 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
10147 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
10148 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
10150 // First instruction of a global dynamic sequence,
10152 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10153 switch (this->optimize_tls_gd(final
))
10155 case tls::TLSOPT_TO_IE
:
10156 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
10157 - elfcpp::R_POWERPC_GOT_TLSGD16
);
10159 case tls::TLSOPT_TO_LE
:
10160 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
10161 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
10162 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
10165 r_type
= elfcpp::R_POWERPC_NONE
;
10166 offset
-= d_offset
;
10173 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
10174 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
10175 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
10176 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
10178 // First instruction of a local dynamic sequence,
10180 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10182 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
10183 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
10185 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
10186 const Output_section
* os
= relinfo
->layout
->tls_segment()
10188 gold_assert(os
!= NULL
);
10189 gold_assert(os
->needs_symtab_index());
10190 r_sym
= os
->symtab_index();
10191 addend
= dtp_offset
;
10195 r_type
= elfcpp::R_POWERPC_NONE
;
10196 offset
-= d_offset
;
10200 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
10201 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
10202 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
10203 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
10205 // First instruction of initial exec sequence.
10206 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10207 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10209 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
10210 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
10211 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
10214 r_type
= elfcpp::R_POWERPC_NONE
;
10215 offset
-= d_offset
;
10219 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
10220 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
10222 // Second instruction of a global dynamic sequence,
10223 // the __tls_get_addr call
10224 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10225 switch (this->optimize_tls_gd(final
))
10227 case tls::TLSOPT_TO_IE
:
10228 r_type
= elfcpp::R_POWERPC_NONE
;
10231 case tls::TLSOPT_TO_LE
:
10232 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10233 offset
+= d_offset
;
10240 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
10241 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
10243 // Second instruction of a local dynamic sequence,
10244 // the __tls_get_addr call
10245 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10247 const Output_section
* os
= relinfo
->layout
->tls_segment()
10249 gold_assert(os
!= NULL
);
10250 gold_assert(os
->needs_symtab_index());
10251 r_sym
= os
->symtab_index();
10252 addend
= dtp_offset
;
10253 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10254 offset
+= d_offset
;
10258 else if (r_type
== elfcpp::R_POWERPC_TLS
)
10260 // Second instruction of an initial exec sequence
10261 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10262 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10264 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10265 offset
+= d_offset
;
10270 reloc_write
.put_r_offset(offset
);
10271 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
10272 reloc_write
.put_r_addend(addend
);
10274 pwrite
+= reloc_size
;
10277 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
10278 == reloc_view_size
);
10281 // Return the value to use for a dynamic symbol which requires special
10282 // treatment. This is how we support equality comparisons of function
10283 // pointers across shared library boundaries, as described in the
10284 // processor specific ABI supplement.
10286 template<int size
, bool big_endian
>
10288 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
10292 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
10293 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10294 p
!= this->stub_tables_
.end();
10297 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10298 = (*p
)->find_plt_call_entry(gsym
);
10300 return (*p
)->stub_address() + ent
->off_
;
10303 else if (this->abiversion() >= 2)
10305 Address off
= this->glink_section()->find_global_entry(gsym
);
10306 if (off
!= invalid_address
)
10307 return this->glink_section()->global_entry_address() + off
;
10309 gold_unreachable();
10312 // Return the PLT address to use for a local symbol.
10313 template<int size
, bool big_endian
>
10315 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
10316 const Relobj
* object
,
10317 unsigned int symndx
) const
10321 const Sized_relobj
<size
, big_endian
>* relobj
10322 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
10323 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10324 p
!= this->stub_tables_
.end();
10327 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10328 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
10330 return (*p
)->stub_address() + ent
->off_
;
10333 gold_unreachable();
10336 // Return the PLT address to use for a global symbol.
10337 template<int size
, bool big_endian
>
10339 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
10340 const Symbol
* gsym
) const
10344 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10345 p
!= this->stub_tables_
.end();
10348 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10349 = (*p
)->find_plt_call_entry(gsym
);
10351 return (*p
)->stub_address() + ent
->off_
;
10354 else if (this->abiversion() >= 2)
10356 Address off
= this->glink_section()->find_global_entry(gsym
);
10357 if (off
!= invalid_address
)
10358 return this->glink_section()->global_entry_address() + off
;
10360 gold_unreachable();
10363 // Return the offset to use for the GOT_INDX'th got entry which is
10364 // for a local tls symbol specified by OBJECT, SYMNDX.
10365 template<int size
, bool big_endian
>
10367 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
10368 const Relobj
* object
,
10369 unsigned int symndx
,
10370 unsigned int got_indx
) const
10372 const Powerpc_relobj
<size
, big_endian
>* ppc_object
10373 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
10374 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
10376 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10377 got_type
<= GOT_TYPE_TPREL
;
10378 got_type
= Got_type(got_type
+ 1))
10379 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
10381 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
10382 if (got_type
== GOT_TYPE_TLSGD
)
10384 if (off
== got_indx
* (size
/ 8))
10386 if (got_type
== GOT_TYPE_TPREL
)
10389 return -dtp_offset
;
10393 gold_unreachable();
10396 // Return the offset to use for the GOT_INDX'th got entry which is
10397 // for global tls symbol GSYM.
10398 template<int size
, bool big_endian
>
10400 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
10402 unsigned int got_indx
) const
10404 if (gsym
->type() == elfcpp::STT_TLS
)
10406 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10407 got_type
<= GOT_TYPE_TPREL
;
10408 got_type
= Got_type(got_type
+ 1))
10409 if (gsym
->has_got_offset(got_type
))
10411 unsigned int off
= gsym
->got_offset(got_type
);
10412 if (got_type
== GOT_TYPE_TLSGD
)
10414 if (off
== got_indx
* (size
/ 8))
10416 if (got_type
== GOT_TYPE_TPREL
)
10419 return -dtp_offset
;
10423 gold_unreachable();
10426 // The selector for powerpc object files.
10428 template<int size
, bool big_endian
>
10429 class Target_selector_powerpc
: public Target_selector
10432 Target_selector_powerpc()
10433 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
10436 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
10437 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
10439 ? (big_endian
? "elf64ppc" : "elf64lppc")
10440 : (big_endian
? "elf32ppc" : "elf32lppc")))
10444 do_instantiate_target()
10445 { return new Target_powerpc
<size
, big_endian
>(); }
10448 Target_selector_powerpc
<32, true> target_selector_ppc32
;
10449 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
10450 Target_selector_powerpc
<64, true> target_selector_ppc64
;
10451 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
10453 // Instantiate these constants for -O0
10454 template<int size
, bool big_endian
>
10455 const typename Output_data_glink
<size
, big_endian
>::Address
10456 Output_data_glink
<size
, big_endian
>::invalid_address
;
10457 template<int size
, bool big_endian
>
10458 const typename Stub_table
<size
, big_endian
>::Address
10459 Stub_table
<size
, big_endian
>::invalid_address
;
10460 template<int size
, bool big_endian
>
10461 const typename Target_powerpc
<size
, big_endian
>::Address
10462 Target_powerpc
<size
, big_endian
>::invalid_address
;
10464 } // End anonymous namespace.