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
), 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 .glink section.
864 const Output_data_glink
<size
, big_endian
>*
865 glink_section() const
867 gold_assert(this->glink_
!= NULL
);
871 Output_data_glink
<size
, big_endian
>*
874 gold_assert(this->glink_
!= NULL
);
878 bool has_glink() const
879 { return this->glink_
!= NULL
; }
881 // Get the GOT section.
882 const Output_data_got_powerpc
<size
, big_endian
>*
885 gold_assert(this->got_
!= NULL
);
889 // Get the GOT section, creating it if necessary.
890 Output_data_got_powerpc
<size
, big_endian
>*
891 got_section(Symbol_table
*, Layout
*);
894 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
895 const elfcpp::Ehdr
<size
, big_endian
>&);
897 // Return the number of entries in the GOT.
899 got_entry_count() const
901 if (this->got_
== NULL
)
903 return this->got_size() / (size
/ 8);
906 // Return the number of entries in the PLT.
908 plt_entry_count() const;
910 // Return the offset of the first non-reserved PLT entry.
912 first_plt_entry_offset() const
916 if (this->abiversion() >= 2)
921 // Return the size of each PLT entry.
923 plt_entry_size() const
927 if (this->abiversion() >= 2)
932 Output_data_save_res
<size
, big_endian
>*
933 savres_section() const
935 return this->savres_section_
;
938 // Add any special sections for this symbol to the gc work list.
939 // For powerpc64, this adds the code section of a function
942 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
944 // Handle target specific gc actions when adding a gc reference from
945 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
946 // and DST_OFF. For powerpc64, this adds a referenc to the code
947 // section of a function descriptor.
949 do_gc_add_reference(Symbol_table
* symtab
,
951 unsigned int src_shndx
,
953 unsigned int dst_shndx
,
954 Address dst_off
) const;
956 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
959 { return this->stub_tables_
; }
961 const Output_data_brlt_powerpc
<size
, big_endian
>*
963 { return this->brlt_section_
; }
966 add_branch_lookup_table(Address to
)
968 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
969 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
973 find_branch_lookup_table(Address to
)
975 typename
Branch_lookup_table::const_iterator p
976 = this->branch_lookup_table_
.find(to
);
977 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
981 write_branch_lookup_table(unsigned char *oview
)
983 for (typename
Branch_lookup_table::const_iterator p
984 = this->branch_lookup_table_
.begin();
985 p
!= this->branch_lookup_table_
.end();
988 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
992 // Wrapper used after relax to define a local symbol in output data,
993 // from the end if value < 0.
995 define_local(Symbol_table
* symtab
, const char* name
,
996 Output_data
* od
, Address value
, unsigned int symsize
)
999 = symtab
->define_in_output_data(name
, NULL
, Symbol_table::PREDEFINED
,
1000 od
, value
, symsize
, elfcpp::STT_NOTYPE
,
1001 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
, 0,
1002 static_cast<Signed_address
>(value
) < 0,
1004 // We are creating this symbol late, so need to fix up things
1005 // done early in Layout::finalize.
1006 sym
->set_dynsym_index(-1U);
1010 plt_thread_safe() const
1011 { return this->plt_thread_safe_
; }
1014 plt_localentry0() const
1015 { return this->plt_localentry0_
; }
1018 set_has_localentry0()
1020 this->has_localentry0_
= true;
1024 is_elfv2_localentry0(const Symbol
* gsym
) const
1027 && this->abiversion() >= 2
1028 && this->plt_localentry0()
1029 && gsym
->type() == elfcpp::STT_FUNC
1030 && gsym
->is_defined()
1031 && gsym
->nonvis() >> 3 == 0
1032 && !gsym
->non_zero_localentry());
1036 is_elfv2_localentry0(const Sized_relobj_file
<size
, big_endian
>* object
,
1037 unsigned int r_sym
) const
1039 const Powerpc_relobj
<size
, big_endian
>* ppc_object
1040 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
1043 && this->abiversion() >= 2
1044 && this->plt_localentry0()
1045 && ppc_object
->st_other(r_sym
) >> 5 == 0)
1047 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
1049 if (!psymval
->is_ifunc_symbol()
1050 && psymval
->input_shndx(&is_ordinary
) != elfcpp::SHN_UNDEF
1057 // Remember any symbols seen with non-zero localentry, even those
1058 // not providing a definition
1060 resolve(Symbol
* to
, const elfcpp::Sym
<size
, big_endian
>& sym
, Object
*,
1065 unsigned char st_other
= sym
.get_st_other();
1066 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1067 to
->set_non_zero_localentry();
1069 // We haven't resolved anything, continue normal processing.
1075 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
1078 set_abiversion(int ver
)
1080 elfcpp::Elf_Word flags
= this->processor_specific_flags();
1081 flags
&= ~elfcpp::EF_PPC64_ABI
;
1082 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
1083 this->set_processor_specific_flags(flags
);
1087 tls_get_addr_opt() const
1088 { return this->tls_get_addr_opt_
; }
1091 tls_get_addr() const
1092 { return this->tls_get_addr_
; }
1094 // If optimizing __tls_get_addr calls, whether this is the
1095 // "__tls_get_addr" symbol.
1097 is_tls_get_addr_opt(const Symbol
* gsym
) const
1099 return this->tls_get_addr_opt_
&& (gsym
== this->tls_get_addr_
1100 || gsym
== this->tls_get_addr_opt_
);
1104 replace_tls_get_addr(const Symbol
* gsym
) const
1105 { return this->tls_get_addr_opt_
&& gsym
== this->tls_get_addr_
; }
1108 set_has_tls_get_addr_opt()
1109 { this->has_tls_get_addr_opt_
= true; }
1111 // Offset to toc save stack slot
1114 { return this->abiversion() < 2 ? 40 : 24; }
1116 // Offset to linker save stack slot. ELFv2 doesn't have a linker word,
1117 // so use the CR save slot. Used only by __tls_get_addr call stub,
1118 // relying on __tls_get_addr not saving CR itself.
1121 { return this->abiversion() < 2 ? 32 : 8; }
1137 : tls_get_addr_state_(NOT_EXPECTED
),
1138 relinfo_(NULL
), relnum_(0), r_offset_(0)
1143 if (this->tls_get_addr_state_
!= NOT_EXPECTED
)
1150 if (this->relinfo_
!= NULL
)
1151 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
1152 _("missing expected __tls_get_addr call"));
1156 expect_tls_get_addr_call(
1157 const Relocate_info
<size
, big_endian
>* relinfo
,
1161 this->tls_get_addr_state_
= EXPECTED
;
1162 this->relinfo_
= relinfo
;
1163 this->relnum_
= relnum
;
1164 this->r_offset_
= r_offset
;
1168 expect_tls_get_addr_call()
1169 { this->tls_get_addr_state_
= EXPECTED
; }
1172 skip_next_tls_get_addr_call()
1173 {this->tls_get_addr_state_
= SKIP
; }
1176 maybe_skip_tls_get_addr_call(Target_powerpc
<size
, big_endian
>* target
,
1177 unsigned int r_type
, const Symbol
* gsym
)
1179 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
1180 || r_type
== elfcpp::R_PPC_PLTREL24
)
1182 && (gsym
== target
->tls_get_addr()
1183 || gsym
== target
->tls_get_addr_opt()));
1184 Tls_get_addr last_tls
= this->tls_get_addr_state_
;
1185 this->tls_get_addr_state_
= NOT_EXPECTED
;
1186 if (is_tls_call
&& last_tls
!= EXPECTED
)
1188 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
1197 // What we're up to regarding calls to __tls_get_addr.
1198 // On powerpc, the branch and link insn making a call to
1199 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1200 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1201 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1202 // The marker relocation always comes first, and has the same
1203 // symbol as the reloc on the insn setting up the __tls_get_addr
1204 // argument. This ties the arg setup insn with the call insn,
1205 // allowing ld to safely optimize away the call. We check that
1206 // every call to __tls_get_addr has a marker relocation, and that
1207 // every marker relocation is on a call to __tls_get_addr.
1208 Tls_get_addr tls_get_addr_state_
;
1209 // Info about the last reloc for error message.
1210 const Relocate_info
<size
, big_endian
>* relinfo_
;
1215 // The class which scans relocations.
1216 class Scan
: protected Track_tls
1219 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1222 : Track_tls(), issued_non_pic_error_(false)
1226 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
1229 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1230 Sized_relobj_file
<size
, big_endian
>* object
,
1231 unsigned int data_shndx
,
1232 Output_section
* output_section
,
1233 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1234 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1238 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
1239 Sized_relobj_file
<size
, big_endian
>* object
,
1240 unsigned int data_shndx
,
1241 Output_section
* output_section
,
1242 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1246 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1248 Sized_relobj_file
<size
, big_endian
>* relobj
,
1251 const elfcpp::Rela
<size
, big_endian
>& ,
1252 unsigned int r_type
,
1253 const elfcpp::Sym
<size
, big_endian
>&)
1255 // PowerPC64 .opd is not folded, so any identical function text
1256 // may be folded and we'll still keep function addresses distinct.
1257 // That means no reloc is of concern here.
1260 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1261 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1262 if (ppcobj
->abiversion() == 1)
1265 // For 32-bit and ELFv2, conservatively assume anything but calls to
1266 // function code might be taking the address of the function.
1267 return !is_branch_reloc(r_type
);
1271 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1273 Sized_relobj_file
<size
, big_endian
>* relobj
,
1276 const elfcpp::Rela
<size
, big_endian
>& ,
1277 unsigned int r_type
,
1283 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1284 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1285 if (ppcobj
->abiversion() == 1)
1288 return !is_branch_reloc(r_type
);
1292 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1293 Sized_relobj_file
<size
, big_endian
>* object
,
1294 unsigned int r_type
, bool report_err
);
1298 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1299 unsigned int r_type
);
1302 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1303 unsigned int r_type
, Symbol
*);
1306 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1307 Target_powerpc
* target
);
1310 check_non_pic(Relobj
*, unsigned int r_type
);
1312 // Whether we have issued an error about a non-PIC compilation.
1313 bool issued_non_pic_error_
;
1317 symval_for_branch(const Symbol_table
* symtab
,
1318 const Sized_symbol
<size
>* gsym
,
1319 Powerpc_relobj
<size
, big_endian
>* object
,
1320 Address
*value
, unsigned int *dest_shndx
);
1322 // The class which implements relocation.
1323 class Relocate
: protected Track_tls
1326 // Use 'at' branch hints when true, 'y' when false.
1327 // FIXME maybe: set this with an option.
1328 static const bool is_isa_v2
= true;
1334 // Do a relocation. Return false if the caller should not issue
1335 // any warnings about this relocation.
1337 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
1338 Target_powerpc
*, Output_section
*, size_t, const unsigned char*,
1339 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
1340 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1344 class Relocate_comdat_behavior
1347 // Decide what the linker should do for relocations that refer to
1348 // discarded comdat sections.
1349 inline Comdat_behavior
1350 get(const char* name
)
1352 gold::Default_comdat_behavior default_behavior
;
1353 Comdat_behavior ret
= default_behavior
.get(name
);
1354 if (ret
== CB_WARNING
)
1357 && (strcmp(name
, ".fixup") == 0
1358 || strcmp(name
, ".got2") == 0))
1361 && (strcmp(name
, ".opd") == 0
1362 || strcmp(name
, ".toc") == 0
1363 || strcmp(name
, ".toc1") == 0))
1370 // Optimize the TLS relocation type based on what we know about the
1371 // symbol. IS_FINAL is true if the final address of this symbol is
1372 // known at link time.
1374 tls::Tls_optimization
1375 optimize_tls_gd(bool is_final
)
1377 // If we are generating a shared library, then we can't do anything
1379 if (parameters
->options().shared()
1380 || !parameters
->options().tls_optimize())
1381 return tls::TLSOPT_NONE
;
1384 return tls::TLSOPT_TO_IE
;
1385 return tls::TLSOPT_TO_LE
;
1388 tls::Tls_optimization
1391 if (parameters
->options().shared()
1392 || !parameters
->options().tls_optimize())
1393 return tls::TLSOPT_NONE
;
1395 return tls::TLSOPT_TO_LE
;
1398 tls::Tls_optimization
1399 optimize_tls_ie(bool is_final
)
1402 || parameters
->options().shared()
1403 || !parameters
->options().tls_optimize())
1404 return tls::TLSOPT_NONE
;
1406 return tls::TLSOPT_TO_LE
;
1411 make_glink_section(Layout
*);
1413 // Create the PLT section.
1415 make_plt_section(Symbol_table
*, Layout
*);
1418 make_iplt_section(Symbol_table
*, Layout
*);
1421 make_brlt_section(Layout
*);
1423 // Create a PLT entry for a global symbol.
1425 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1427 // Create a PLT entry for a local IFUNC symbol.
1429 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1430 Sized_relobj_file
<size
, big_endian
>*,
1434 // Create a GOT entry for local dynamic __tls_get_addr.
1436 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1437 Sized_relobj_file
<size
, big_endian
>* object
);
1440 tlsld_got_offset() const
1442 return this->tlsld_got_offset_
;
1445 // Get the dynamic reloc section, creating it if necessary.
1447 rela_dyn_section(Layout
*);
1449 // Similarly, but for ifunc symbols get the one for ifunc.
1451 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1453 // Copy a relocation against a global symbol.
1455 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1456 Sized_relobj_file
<size
, big_endian
>* object
,
1457 unsigned int shndx
, Output_section
* output_section
,
1458 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1460 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1461 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1462 symtab
->get_sized_symbol
<size
>(sym
),
1463 object
, shndx
, output_section
,
1464 r_type
, reloc
.get_r_offset(),
1465 reloc
.get_r_addend(),
1466 this->rela_dyn_section(layout
));
1469 // Look over all the input sections, deciding where to place stubs.
1471 group_sections(Layout
*, const Task
*, bool);
1473 // Sort output sections by address.
1474 struct Sort_sections
1477 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1478 { return sec1
->address() < sec2
->address(); }
1484 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1485 unsigned int data_shndx
,
1487 unsigned int r_type
,
1490 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1491 r_type_(r_type
), tocsave_ (0), r_sym_(r_sym
), addend_(addend
)
1497 // Return whether this branch is going via a plt call stub, and if
1498 // so, mark it as having an R_PPC64_TOCSAVE.
1500 mark_pltcall(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1501 unsigned int shndx
, Address offset
,
1502 Target_powerpc
* target
, Symbol_table
* symtab
);
1504 // If this branch needs a plt call stub, or a long branch stub, make one.
1506 make_stub(Stub_table
<size
, big_endian
>*,
1507 Stub_table
<size
, big_endian
>*,
1508 Symbol_table
*) const;
1511 // The branch location..
1512 Powerpc_relobj
<size
, big_endian
>* object_
;
1513 unsigned int shndx_
;
1515 // ..and the branch type and destination.
1516 unsigned int r_type_
: 31;
1517 unsigned int tocsave_
: 1;
1518 unsigned int r_sym_
;
1522 // Information about this specific target which we pass to the
1523 // general Target structure.
1524 static Target::Target_info powerpc_info
;
1526 // The types of GOT entries needed for this platform.
1527 // These values are exposed to the ABI in an incremental link.
1528 // Do not renumber existing values without changing the version
1529 // number of the .gnu_incremental_inputs section.
1533 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1534 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1535 GOT_TYPE_TPREL
// entry for @got@tprel
1539 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1540 // The PLT section. This is a container for a table of addresses,
1541 // and their relocations. Each address in the PLT has a dynamic
1542 // relocation (R_*_JMP_SLOT) and each address will have a
1543 // corresponding entry in .glink for lazy resolution of the PLT.
1544 // ppc32 initialises the PLT to point at the .glink entry, while
1545 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1546 // linker adds a stub that loads the PLT entry into ctr then
1547 // branches to ctr. There may be more than one stub for each PLT
1548 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1549 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1550 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1551 // The IPLT section. Like plt_, this is a container for a table of
1552 // addresses and their relocations, specifically for STT_GNU_IFUNC
1553 // functions that resolve locally (STT_GNU_IFUNC functions that
1554 // don't resolve locally go in PLT). Unlike plt_, these have no
1555 // entry in .glink for lazy resolution, and the relocation section
1556 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1557 // the relocation section may contain relocations against
1558 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1559 // relocation section will appear at the end of other dynamic
1560 // relocations, so that ld.so applies these relocations after other
1561 // dynamic relocations. In a static executable, the relocation
1562 // section is emitted and marked with __rela_iplt_start and
1563 // __rela_iplt_end symbols.
1564 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1565 // Section holding long branch destinations.
1566 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1567 // The .glink section.
1568 Output_data_glink
<size
, big_endian
>* glink_
;
1569 // The dynamic reloc section.
1570 Reloc_section
* rela_dyn_
;
1571 // Relocs saved to avoid a COPY reloc.
1572 Powerpc_copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1573 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1574 unsigned int tlsld_got_offset_
;
1576 Stub_tables stub_tables_
;
1577 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1578 Branch_lookup_table branch_lookup_table_
;
1580 typedef std::vector
<Branch_info
> Branches
;
1581 Branches branch_info_
;
1582 Tocsave_loc tocsave_loc_
;
1584 bool plt_thread_safe_
;
1585 bool plt_localentry0_
;
1586 bool plt_localentry0_init_
;
1587 bool has_localentry0_
;
1588 bool has_tls_get_addr_opt_
;
1591 int relax_fail_count_
;
1592 int32_t stub_group_size_
;
1594 Output_data_save_res
<size
, big_endian
> *savres_section_
;
1596 // The "__tls_get_addr" symbol, if present
1597 Symbol
* tls_get_addr_
;
1598 // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol.
1599 Symbol
* tls_get_addr_opt_
;
1603 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1606 true, // is_big_endian
1607 elfcpp::EM_PPC
, // machine_code
1608 false, // has_make_symbol
1609 false, // has_resolve
1610 false, // has_code_fill
1611 true, // is_default_stack_executable
1612 false, // can_icf_inline_merge_sections
1614 "/usr/lib/ld.so.1", // dynamic_linker
1615 0x10000000, // default_text_segment_address
1616 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1617 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1618 false, // isolate_execinstr
1620 elfcpp::SHN_UNDEF
, // small_common_shndx
1621 elfcpp::SHN_UNDEF
, // large_common_shndx
1622 0, // small_common_section_flags
1623 0, // large_common_section_flags
1624 NULL
, // attributes_section
1625 NULL
, // attributes_vendor
1626 "_start", // entry_symbol_name
1627 32, // hash_entry_size
1628 elfcpp::SHT_PROGBITS
, // unwind_section_type
1632 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1635 false, // is_big_endian
1636 elfcpp::EM_PPC
, // machine_code
1637 false, // has_make_symbol
1638 false, // has_resolve
1639 false, // has_code_fill
1640 true, // is_default_stack_executable
1641 false, // can_icf_inline_merge_sections
1643 "/usr/lib/ld.so.1", // dynamic_linker
1644 0x10000000, // default_text_segment_address
1645 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1646 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1647 false, // isolate_execinstr
1649 elfcpp::SHN_UNDEF
, // small_common_shndx
1650 elfcpp::SHN_UNDEF
, // large_common_shndx
1651 0, // small_common_section_flags
1652 0, // large_common_section_flags
1653 NULL
, // attributes_section
1654 NULL
, // attributes_vendor
1655 "_start", // entry_symbol_name
1656 32, // hash_entry_size
1657 elfcpp::SHT_PROGBITS
, // unwind_section_type
1661 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1664 true, // is_big_endian
1665 elfcpp::EM_PPC64
, // machine_code
1666 false, // has_make_symbol
1667 true, // has_resolve
1668 false, // has_code_fill
1669 false, // is_default_stack_executable
1670 false, // can_icf_inline_merge_sections
1672 "/usr/lib/ld.so.1", // dynamic_linker
1673 0x10000000, // default_text_segment_address
1674 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1675 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1676 false, // isolate_execinstr
1678 elfcpp::SHN_UNDEF
, // small_common_shndx
1679 elfcpp::SHN_UNDEF
, // large_common_shndx
1680 0, // small_common_section_flags
1681 0, // large_common_section_flags
1682 NULL
, // attributes_section
1683 NULL
, // attributes_vendor
1684 "_start", // entry_symbol_name
1685 32, // hash_entry_size
1686 elfcpp::SHT_PROGBITS
, // unwind_section_type
1690 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1693 false, // is_big_endian
1694 elfcpp::EM_PPC64
, // machine_code
1695 false, // has_make_symbol
1696 true, // has_resolve
1697 false, // has_code_fill
1698 false, // is_default_stack_executable
1699 false, // can_icf_inline_merge_sections
1701 "/usr/lib/ld.so.1", // dynamic_linker
1702 0x10000000, // default_text_segment_address
1703 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1704 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1705 false, // isolate_execinstr
1707 elfcpp::SHN_UNDEF
, // small_common_shndx
1708 elfcpp::SHN_UNDEF
, // large_common_shndx
1709 0, // small_common_section_flags
1710 0, // large_common_section_flags
1711 NULL
, // attributes_section
1712 NULL
, // attributes_vendor
1713 "_start", // entry_symbol_name
1714 32, // hash_entry_size
1715 elfcpp::SHT_PROGBITS
, // unwind_section_type
1719 is_branch_reloc(unsigned int r_type
)
1721 return (r_type
== elfcpp::R_POWERPC_REL24
1722 || r_type
== elfcpp::R_PPC_PLTREL24
1723 || r_type
== elfcpp::R_PPC_LOCAL24PC
1724 || r_type
== elfcpp::R_POWERPC_REL14
1725 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1726 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1727 || r_type
== elfcpp::R_POWERPC_ADDR24
1728 || r_type
== elfcpp::R_POWERPC_ADDR14
1729 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1730 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1733 // If INSN is an opcode that may be used with an @tls operand, return
1734 // the transformed insn for TLS optimisation, otherwise return 0. If
1735 // REG is non-zero only match an insn with RB or RA equal to REG.
1737 at_tls_transform(uint32_t insn
, unsigned int reg
)
1739 if ((insn
& (0x3f << 26)) != 31 << 26)
1743 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1744 rtra
= insn
& ((1 << 26) - (1 << 16));
1745 else if (((insn
>> 16) & 0x1f) == reg
)
1746 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1750 if ((insn
& (0x3ff << 1)) == 266 << 1)
1753 else if ((insn
& (0x1f << 1)) == 23 << 1
1754 && ((insn
& (0x1f << 6)) < 14 << 6
1755 || ((insn
& (0x1f << 6)) >= 16 << 6
1756 && (insn
& (0x1f << 6)) < 24 << 6)))
1757 // load and store indexed -> dform
1758 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1759 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1760 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1761 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1762 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1764 insn
= (58 << 26) | 2;
1772 template<int size
, bool big_endian
>
1773 class Powerpc_relocate_functions
1793 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1794 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1795 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1797 template<int valsize
>
1799 has_overflow_signed(Address value
)
1801 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1802 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1803 limit
<<= ((valsize
- 1) >> 1);
1804 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1805 return value
+ limit
> (limit
<< 1) - 1;
1808 template<int valsize
>
1810 has_overflow_unsigned(Address value
)
1812 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1813 limit
<<= ((valsize
- 1) >> 1);
1814 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1815 return value
> (limit
<< 1) - 1;
1818 template<int valsize
>
1820 has_overflow_bitfield(Address value
)
1822 return (has_overflow_unsigned
<valsize
>(value
)
1823 && has_overflow_signed
<valsize
>(value
));
1826 template<int valsize
>
1827 static inline Status
1828 overflowed(Address value
, Overflow_check overflow
)
1830 if (overflow
== CHECK_SIGNED
)
1832 if (has_overflow_signed
<valsize
>(value
))
1833 return STATUS_OVERFLOW
;
1835 else if (overflow
== CHECK_UNSIGNED
)
1837 if (has_overflow_unsigned
<valsize
>(value
))
1838 return STATUS_OVERFLOW
;
1840 else if (overflow
== CHECK_BITFIELD
)
1842 if (has_overflow_bitfield
<valsize
>(value
))
1843 return STATUS_OVERFLOW
;
1848 // Do a simple RELA relocation
1849 template<int fieldsize
, int valsize
>
1850 static inline Status
1851 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1853 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1854 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1855 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1856 return overflowed
<valsize
>(value
, overflow
);
1859 template<int fieldsize
, int valsize
>
1860 static inline Status
1861 rela(unsigned char* view
,
1862 unsigned int right_shift
,
1863 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1865 Overflow_check overflow
)
1867 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1868 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1869 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1870 Valtype reloc
= value
>> right_shift
;
1873 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1874 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1877 // Do a simple RELA relocation, unaligned.
1878 template<int fieldsize
, int valsize
>
1879 static inline Status
1880 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1882 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1883 return overflowed
<valsize
>(value
, overflow
);
1886 template<int fieldsize
, int valsize
>
1887 static inline Status
1888 rela_ua(unsigned char* view
,
1889 unsigned int right_shift
,
1890 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1892 Overflow_check overflow
)
1894 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1896 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1897 Valtype reloc
= value
>> right_shift
;
1900 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1901 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1905 // R_PPC64_ADDR64: (Symbol + Addend)
1907 addr64(unsigned char* view
, Address value
)
1908 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1910 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1912 addr64_u(unsigned char* view
, Address value
)
1913 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1915 // R_POWERPC_ADDR32: (Symbol + Addend)
1916 static inline Status
1917 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1918 { return This::template rela
<32,32>(view
, value
, overflow
); }
1920 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1921 static inline Status
1922 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1923 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1925 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1926 static inline Status
1927 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1929 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1931 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1932 stat
= STATUS_OVERFLOW
;
1936 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1937 static inline Status
1938 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1939 { return This::template rela
<16,16>(view
, value
, overflow
); }
1941 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1942 static inline Status
1943 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1944 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1946 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1947 static inline Status
1948 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1950 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1951 if ((value
& 3) != 0)
1952 stat
= STATUS_OVERFLOW
;
1956 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1957 static inline Status
1958 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1960 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1961 if ((value
& 15) != 0)
1962 stat
= STATUS_OVERFLOW
;
1966 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1968 addr16_hi(unsigned char* view
, Address value
)
1969 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1971 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1973 addr16_ha(unsigned char* view
, Address value
)
1974 { This::addr16_hi(view
, value
+ 0x8000); }
1976 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1978 addr16_hi2(unsigned char* view
, Address value
)
1979 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1981 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1983 addr16_ha2(unsigned char* view
, Address value
)
1984 { This::addr16_hi2(view
, value
+ 0x8000); }
1986 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1988 addr16_hi3(unsigned char* view
, Address value
)
1989 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1991 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1993 addr16_ha3(unsigned char* view
, Address value
)
1994 { This::addr16_hi3(view
, value
+ 0x8000); }
1996 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1997 static inline Status
1998 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
2000 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
2001 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
2002 stat
= STATUS_OVERFLOW
;
2006 // R_POWERPC_REL16DX_HA
2007 static inline Status
2008 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
2010 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
2011 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
2012 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
2014 value
= static_cast<SignedAddress
>(value
) >> 16;
2015 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
2016 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
2017 return overflowed
<16>(value
, overflow
);
2021 // Set ABI version for input and output.
2023 template<int size
, bool big_endian
>
2025 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
2027 this->e_flags_
|= ver
;
2028 if (this->abiversion() != 0)
2030 Target_powerpc
<size
, big_endian
>* target
=
2031 static_cast<Target_powerpc
<size
, big_endian
>*>(
2032 parameters
->sized_target
<size
, big_endian
>());
2033 if (target
->abiversion() == 0)
2034 target
->set_abiversion(this->abiversion());
2035 else if (target
->abiversion() != this->abiversion())
2036 gold_error(_("%s: ABI version %d is not compatible "
2037 "with ABI version %d output"),
2038 this->name().c_str(),
2039 this->abiversion(), target
->abiversion());
2044 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
2045 // relocatable object, if such sections exists.
2047 template<int size
, bool big_endian
>
2049 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
2050 Read_symbols_data
* sd
)
2052 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2053 const unsigned char* namesu
= sd
->section_names
->data();
2054 const char* names
= reinterpret_cast<const char*>(namesu
);
2055 section_size_type names_size
= sd
->section_names_size
;
2056 const unsigned char* s
;
2058 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
2059 size
== 32 ? ".got2" : ".opd",
2060 names
, names_size
, NULL
);
2063 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2064 this->special_
= ndx
;
2067 if (this->abiversion() == 0)
2068 this->set_abiversion(1);
2069 else if (this->abiversion() > 1)
2070 gold_error(_("%s: .opd invalid in abiv%d"),
2071 this->name().c_str(), this->abiversion());
2076 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
2077 names
, names_size
, NULL
);
2080 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2081 this->relatoc_
= ndx
;
2082 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2083 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
2086 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
2089 // Examine .rela.opd to build info about function entry points.
2091 template<int size
, bool big_endian
>
2093 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
2095 const unsigned char* prelocs
,
2096 const unsigned char* plocal_syms
)
2100 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
2101 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
2102 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2103 Address expected_off
= 0;
2104 bool regular
= true;
2105 unsigned int opd_ent_size
= 0;
2107 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2109 Reltype
reloc(prelocs
);
2110 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
2111 = reloc
.get_r_info();
2112 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2113 if (r_type
== elfcpp::R_PPC64_ADDR64
)
2115 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2116 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
2119 if (r_sym
< this->local_symbol_count())
2121 typename
elfcpp::Sym
<size
, big_endian
>
2122 lsym(plocal_syms
+ r_sym
* sym_size
);
2123 shndx
= lsym
.get_st_shndx();
2124 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2125 value
= lsym
.get_st_value();
2128 shndx
= this->symbol_section_and_value(r_sym
, &value
,
2130 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
2131 value
+ reloc
.get_r_addend());
2134 expected_off
= reloc
.get_r_offset();
2135 opd_ent_size
= expected_off
;
2137 else if (expected_off
!= reloc
.get_r_offset())
2139 expected_off
+= opd_ent_size
;
2141 else if (r_type
== elfcpp::R_PPC64_TOC
)
2143 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
2148 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2149 this->name().c_str(), r_type
);
2153 if (reloc_count
<= 2)
2154 opd_ent_size
= this->section_size(this->opd_shndx());
2155 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
2159 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2160 this->name().c_str());
2166 // Returns true if a code sequence loading the TOC entry at VALUE
2167 // relative to the TOC pointer can be converted into code calculating
2168 // a TOC pointer relative offset.
2169 // If so, the TOC pointer relative offset is stored to VALUE.
2171 template<int size
, bool big_endian
>
2173 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
2174 Target_powerpc
<size
, big_endian
>* target
,
2180 // With -mcmodel=medium code it is quite possible to have
2181 // toc-relative relocs referring to objects outside the TOC.
2182 // Don't try to look at a non-existent TOC.
2183 if (this->toc_shndx() == 0)
2186 // Convert VALUE back to an address by adding got_base (see below),
2187 // then to an offset in the TOC by subtracting the TOC output
2188 // section address and the TOC output offset. Since this TOC output
2189 // section and the got output section are one and the same, we can
2190 // omit adding and subtracting the output section address.
2191 Address off
= (*value
+ this->toc_base_offset()
2192 - this->output_section_offset(this->toc_shndx()));
2193 // Is this offset in the TOC? -mcmodel=medium code may be using
2194 // TOC relative access to variables outside the TOC. Those of
2195 // course can't be optimized. We also don't try to optimize code
2196 // that is using a different object's TOC.
2197 if (off
>= this->section_size(this->toc_shndx()))
2200 if (this->no_toc_opt(off
))
2203 section_size_type vlen
;
2204 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2205 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2207 Address got_base
= (target
->got_section()->output_section()->address()
2208 + this->toc_base_offset());
2210 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2217 // Perform the Sized_relobj_file method, then set up opd info from
2220 template<int size
, bool big_endian
>
2222 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2224 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2227 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2228 p
!= rd
->relocs
.end();
2231 if (p
->data_shndx
== this->opd_shndx())
2233 uint64_t opd_size
= this->section_size(this->opd_shndx());
2234 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2237 this->init_opd(opd_size
);
2238 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2239 rd
->local_symbols
->data());
2247 // Read the symbols then set up st_other vector.
2249 template<int size
, bool big_endian
>
2251 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2253 this->base_read_symbols(sd
);
2256 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2257 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2258 const unsigned int loccount
= this->do_local_symbol_count();
2261 this->st_other_
.resize(loccount
);
2262 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2263 off_t locsize
= loccount
* sym_size
;
2264 const unsigned int symtab_shndx
= this->symtab_shndx();
2265 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2266 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2267 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2268 locsize
, true, false);
2270 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2272 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2273 unsigned char st_other
= sym
.get_st_other();
2274 this->st_other_
[i
] = st_other
;
2275 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2277 if (this->abiversion() == 0)
2278 this->set_abiversion(2);
2279 else if (this->abiversion() < 2)
2280 gold_error(_("%s: local symbol %d has invalid st_other"
2281 " for ABI version 1"),
2282 this->name().c_str(), i
);
2289 template<int size
, bool big_endian
>
2291 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2293 this->e_flags_
|= ver
;
2294 if (this->abiversion() != 0)
2296 Target_powerpc
<size
, big_endian
>* target
=
2297 static_cast<Target_powerpc
<size
, big_endian
>*>(
2298 parameters
->sized_target
<size
, big_endian
>());
2299 if (target
->abiversion() == 0)
2300 target
->set_abiversion(this->abiversion());
2301 else if (target
->abiversion() != this->abiversion())
2302 gold_error(_("%s: ABI version %d is not compatible "
2303 "with ABI version %d output"),
2304 this->name().c_str(),
2305 this->abiversion(), target
->abiversion());
2310 // Call Sized_dynobj::base_read_symbols to read the symbols then
2311 // read .opd from a dynamic object, filling in opd_ent_ vector,
2313 template<int size
, bool big_endian
>
2315 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2317 this->base_read_symbols(sd
);
2320 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2321 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2322 const unsigned char* namesu
= sd
->section_names
->data();
2323 const char* names
= reinterpret_cast<const char*>(namesu
);
2324 const unsigned char* s
= NULL
;
2325 const unsigned char* opd
;
2326 section_size_type opd_size
;
2328 // Find and read .opd section.
2331 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2332 sd
->section_names_size
,
2337 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2338 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2339 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2341 if (this->abiversion() == 0)
2342 this->set_abiversion(1);
2343 else if (this->abiversion() > 1)
2344 gold_error(_("%s: .opd invalid in abiv%d"),
2345 this->name().c_str(), this->abiversion());
2347 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2348 this->opd_address_
= shdr
.get_sh_addr();
2349 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2350 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2356 // Build set of executable sections.
2357 // Using a set is probably overkill. There is likely to be only
2358 // a few executable sections, typically .init, .text and .fini,
2359 // and they are generally grouped together.
2360 typedef std::set
<Sec_info
> Exec_sections
;
2361 Exec_sections exec_sections
;
2363 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2365 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2366 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2367 && ((shdr
.get_sh_flags()
2368 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2369 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2370 && shdr
.get_sh_size() != 0)
2372 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2373 shdr
.get_sh_size(), i
));
2376 if (exec_sections
.empty())
2379 // Look over the OPD entries. This is complicated by the fact
2380 // that some binaries will use two-word entries while others
2381 // will use the standard three-word entries. In most cases
2382 // the third word (the environment pointer for languages like
2383 // Pascal) is unused and will be zero. If the third word is
2384 // used it should not be pointing into executable sections,
2386 this->init_opd(opd_size
);
2387 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2389 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2390 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2391 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2393 // Chances are that this is the third word of an OPD entry.
2395 typename
Exec_sections::const_iterator e
2396 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2397 if (e
!= exec_sections
.begin())
2400 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2402 // We have an address in an executable section.
2403 // VAL ought to be the function entry, set it up.
2404 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2405 // Skip second word of OPD entry, the TOC pointer.
2409 // If we didn't match any executable sections, we likely
2410 // have a non-zero third word in the OPD entry.
2415 // Relocate sections.
2417 template<int size
, bool big_endian
>
2419 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2420 const Symbol_table
* symtab
, const Layout
* layout
,
2421 const unsigned char* pshdrs
, Output_file
* of
,
2422 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2424 unsigned int start
= 1;
2426 && this->relatoc_
!= 0
2427 && !parameters
->options().relocatable())
2429 // Relocate .toc first.
2430 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2431 this->relatoc_
, this->relatoc_
);
2432 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2433 1, this->relatoc_
- 1);
2434 start
= this->relatoc_
+ 1;
2436 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2437 start
, this->shnum() - 1);
2440 // Set up some symbols.
2442 template<int size
, bool big_endian
>
2444 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2445 Symbol_table
* symtab
,
2450 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2451 // undefined when scanning relocs (and thus requires
2452 // non-relative dynamic relocs). The proper value will be
2454 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2455 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2457 Target_powerpc
<size
, big_endian
>* target
=
2458 static_cast<Target_powerpc
<size
, big_endian
>*>(
2459 parameters
->sized_target
<size
, big_endian
>());
2460 Output_data_got_powerpc
<size
, big_endian
>* got
2461 = target
->got_section(symtab
, layout
);
2462 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2463 Symbol_table::PREDEFINED
,
2467 elfcpp::STV_HIDDEN
, 0,
2471 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2472 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2473 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2475 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2477 = layout
->add_output_section_data(".sdata", 0,
2479 | elfcpp::SHF_WRITE
,
2480 sdata
, ORDER_SMALL_DATA
, false);
2481 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2482 Symbol_table::PREDEFINED
,
2483 os
, 32768, 0, elfcpp::STT_OBJECT
,
2484 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2490 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2491 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2492 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2494 Target_powerpc
<size
, big_endian
>* target
=
2495 static_cast<Target_powerpc
<size
, big_endian
>*>(
2496 parameters
->sized_target
<size
, big_endian
>());
2497 Output_data_got_powerpc
<size
, big_endian
>* got
2498 = target
->got_section(symtab
, layout
);
2499 symtab
->define_in_output_data(".TOC.", NULL
,
2500 Symbol_table::PREDEFINED
,
2504 elfcpp::STV_HIDDEN
, 0,
2509 this->tls_get_addr_
= symtab
->lookup("__tls_get_addr");
2510 if (parameters
->options().tls_get_addr_optimize()
2511 && this->tls_get_addr_
!= NULL
2512 && this->tls_get_addr_
->in_reg())
2513 this->tls_get_addr_opt_
= symtab
->lookup("__tls_get_addr_opt");
2514 if (this->tls_get_addr_opt_
!= NULL
)
2516 if (this->tls_get_addr_
->is_undefined()
2517 || this->tls_get_addr_
->is_from_dynobj())
2519 // Make it seem as if references to __tls_get_addr are
2520 // really to __tls_get_addr_opt, so the latter symbol is
2521 // made dynamic, not the former.
2522 this->tls_get_addr_
->clear_in_reg();
2523 this->tls_get_addr_opt_
->set_in_reg();
2525 // We have a non-dynamic definition for __tls_get_addr.
2526 // Make __tls_get_addr_opt the same, if it does not already have
2527 // a non-dynamic definition.
2528 else if (this->tls_get_addr_opt_
->is_undefined()
2529 || this->tls_get_addr_opt_
->is_from_dynobj())
2531 Sized_symbol
<size
>* from
2532 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_
);
2533 Sized_symbol
<size
>* to
2534 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_opt_
);
2535 symtab
->clone
<size
>(to
, from
);
2540 // Set up PowerPC target specific relobj.
2542 template<int size
, bool big_endian
>
2544 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2545 const std::string
& name
,
2546 Input_file
* input_file
,
2547 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2549 int et
= ehdr
.get_e_type();
2550 // ET_EXEC files are valid input for --just-symbols/-R,
2551 // and we treat them as relocatable objects.
2552 if (et
== elfcpp::ET_REL
2553 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2555 Powerpc_relobj
<size
, big_endian
>* obj
=
2556 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2560 else if (et
== elfcpp::ET_DYN
)
2562 Powerpc_dynobj
<size
, big_endian
>* obj
=
2563 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2569 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2574 template<int size
, bool big_endian
>
2575 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2578 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2579 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2581 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2582 : Output_data_got
<size
, big_endian
>(),
2583 symtab_(symtab
), layout_(layout
),
2584 header_ent_cnt_(size
== 32 ? 3 : 1),
2585 header_index_(size
== 32 ? 0x2000 : 0)
2588 this->set_addralign(256);
2591 // Override all the Output_data_got methods we use so as to first call
2594 add_global(Symbol
* gsym
, unsigned int got_type
)
2596 this->reserve_ent();
2597 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2601 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2603 this->reserve_ent();
2604 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2608 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2609 { return this->add_global_plt(gsym
, got_type
); }
2612 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2613 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2615 this->reserve_ent();
2616 Output_data_got
<size
, big_endian
>::
2617 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2621 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2622 Output_data_reloc_generic
* rel_dyn
,
2623 unsigned int r_type_1
, unsigned int r_type_2
)
2625 if (gsym
->has_got_offset(got_type
))
2628 this->reserve_ent(2);
2629 Output_data_got
<size
, big_endian
>::
2630 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2634 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2636 this->reserve_ent();
2637 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2642 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2644 this->reserve_ent();
2645 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2650 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2651 { return this->add_local_plt(object
, sym_index
, got_type
); }
2654 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2655 unsigned int got_type
,
2656 Output_data_reloc_generic
* rel_dyn
,
2657 unsigned int r_type
)
2659 if (object
->local_has_got_offset(sym_index
, got_type
))
2662 this->reserve_ent(2);
2663 Output_data_got
<size
, big_endian
>::
2664 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2668 add_constant(Valtype constant
)
2670 this->reserve_ent();
2671 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2675 add_constant_pair(Valtype c1
, Valtype c2
)
2677 this->reserve_ent(2);
2678 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2681 // Offset of _GLOBAL_OFFSET_TABLE_.
2685 return this->got_offset(this->header_index_
);
2688 // Offset of base used to access the GOT/TOC.
2689 // The got/toc pointer reg will be set to this value.
2691 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2694 return this->g_o_t();
2696 return (this->output_section()->address()
2697 + object
->toc_base_offset()
2701 // Ensure our GOT has a header.
2703 set_final_data_size()
2705 if (this->header_ent_cnt_
!= 0)
2706 this->make_header();
2707 Output_data_got
<size
, big_endian
>::set_final_data_size();
2710 // First word of GOT header needs some values that are not
2711 // handled by Output_data_got so poke them in here.
2712 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2714 do_write(Output_file
* of
)
2717 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2718 val
= this->layout_
->dynamic_section()->address();
2720 val
= this->output_section()->address() + 0x8000;
2721 this->replace_constant(this->header_index_
, val
);
2722 Output_data_got
<size
, big_endian
>::do_write(of
);
2727 reserve_ent(unsigned int cnt
= 1)
2729 if (this->header_ent_cnt_
== 0)
2731 if (this->num_entries() + cnt
> this->header_index_
)
2732 this->make_header();
2738 this->header_ent_cnt_
= 0;
2739 this->header_index_
= this->num_entries();
2742 Output_data_got
<size
, big_endian
>::add_constant(0);
2743 Output_data_got
<size
, big_endian
>::add_constant(0);
2744 Output_data_got
<size
, big_endian
>::add_constant(0);
2746 // Define _GLOBAL_OFFSET_TABLE_ at the header
2747 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2750 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2751 sym
->set_value(this->g_o_t());
2754 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2755 Symbol_table::PREDEFINED
,
2756 this, this->g_o_t(), 0,
2759 elfcpp::STV_HIDDEN
, 0,
2763 Output_data_got
<size
, big_endian
>::add_constant(0);
2766 // Stashed pointers.
2767 Symbol_table
* symtab_
;
2771 unsigned int header_ent_cnt_
;
2772 // GOT header index.
2773 unsigned int header_index_
;
2776 // Get the GOT section, creating it if necessary.
2778 template<int size
, bool big_endian
>
2779 Output_data_got_powerpc
<size
, big_endian
>*
2780 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2783 if (this->got_
== NULL
)
2785 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2788 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2790 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2791 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2792 this->got_
, ORDER_DATA
, false);
2798 // Get the dynamic reloc section, creating it if necessary.
2800 template<int size
, bool big_endian
>
2801 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2802 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2804 if (this->rela_dyn_
== NULL
)
2806 gold_assert(layout
!= NULL
);
2807 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2808 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2809 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2810 ORDER_DYNAMIC_RELOCS
, false);
2812 return this->rela_dyn_
;
2815 // Similarly, but for ifunc symbols get the one for ifunc.
2817 template<int size
, bool big_endian
>
2818 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2819 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2824 return this->rela_dyn_section(layout
);
2826 if (this->iplt_
== NULL
)
2827 this->make_iplt_section(symtab
, layout
);
2828 return this->iplt_
->rel_plt();
2834 // Determine the stub group size. The group size is the absolute
2835 // value of the parameter --stub-group-size. If --stub-group-size
2836 // is passed a negative value, we restrict stubs to be always after
2837 // the stubbed branches.
2838 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2839 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2840 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2841 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2842 owner_(NULL
), output_section_(NULL
)
2846 // Return true iff input section can be handled by current stub
2849 can_add_to_stub_group(Output_section
* o
,
2850 const Output_section::Input_section
* i
,
2853 const Output_section::Input_section
*
2859 { return output_section_
; }
2862 set_output_and_owner(Output_section
* o
,
2863 const Output_section::Input_section
* i
)
2865 this->output_section_
= o
;
2874 // Adding group sections before the stubs.
2875 FINDING_STUB_SECTION
,
2876 // Adding group sections after the stubs.
2880 uint32_t stub_group_size_
;
2881 bool stubs_always_after_branch_
;
2882 bool suppress_size_errors_
;
2883 // True if a stub group can serve multiple output sections.
2886 // Current max size of group. Starts at stub_group_size_ but is
2887 // reduced to stub_group_size_/1024 on seeing a section with
2888 // external conditional branches.
2889 uint32_t group_size_
;
2890 uint64_t group_start_addr_
;
2891 // owner_ and output_section_ specify the section to which stubs are
2892 // attached. The stubs are placed at the end of this section.
2893 const Output_section::Input_section
* owner_
;
2894 Output_section
* output_section_
;
2897 // Return true iff input section can be handled by current stub
2898 // group. Sections are presented to this function in order,
2899 // so the first section is the head of the group.
2902 Stub_control::can_add_to_stub_group(Output_section
* o
,
2903 const Output_section::Input_section
* i
,
2906 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2908 uint64_t start_addr
= o
->address();
2911 // .init and .fini sections are pasted together to form a single
2912 // function. We can't be adding stubs in the middle of the function.
2913 this_size
= o
->data_size();
2916 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2917 this_size
= i
->data_size();
2920 uint64_t end_addr
= start_addr
+ this_size
;
2921 uint32_t group_size
= this->stub_group_size_
;
2923 this->group_size_
= group_size
= group_size
>> 10;
2925 if (this_size
> group_size
&& !this->suppress_size_errors_
)
2926 gold_warning(_("%s:%s exceeds group size"),
2927 i
->relobj()->name().c_str(),
2928 i
->relobj()->section_name(i
->shndx()).c_str());
2930 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
2931 has14
? " 14bit" : "",
2932 i
->relobj()->name().c_str(),
2933 i
->relobj()->section_name(i
->shndx()).c_str(),
2934 (long long) this_size
,
2935 (this->state_
== NO_GROUP
2937 : (long long) end_addr
- this->group_start_addr_
));
2939 if (this->state_
== NO_GROUP
)
2941 // Only here on very first use of Stub_control
2943 this->output_section_
= o
;
2944 this->state_
= FINDING_STUB_SECTION
;
2945 this->group_size_
= group_size
;
2946 this->group_start_addr_
= start_addr
;
2949 else if (!this->multi_os_
&& this->output_section_
!= o
)
2951 else if (this->state_
== HAS_STUB_SECTION
)
2953 // Can we add this section, which is after the stubs, to the
2955 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
2958 else if (this->state_
== FINDING_STUB_SECTION
)
2960 if ((whole_sec
&& this->output_section_
== o
)
2961 || end_addr
- this->group_start_addr_
<= this->group_size_
)
2963 // Stubs are added at the end of "owner_".
2965 this->output_section_
= o
;
2968 // The group before the stubs has reached maximum size.
2969 // Now see about adding sections after the stubs to the
2970 // group. If the current section has a 14-bit branch and
2971 // the group before the stubs exceeds group_size_ (because
2972 // they didn't have 14-bit branches), don't add sections
2973 // after the stubs: The size of stubs for such a large
2974 // group may exceed the reach of a 14-bit branch.
2975 if (!this->stubs_always_after_branch_
2976 && this_size
<= this->group_size_
2977 && start_addr
- this->group_start_addr_
<= this->group_size_
)
2979 gold_debug(DEBUG_TARGET
, "adding after stubs");
2980 this->state_
= HAS_STUB_SECTION
;
2981 this->group_start_addr_
= start_addr
;
2988 gold_debug(DEBUG_TARGET
,
2989 !this->multi_os_
&& this->output_section_
!= o
2990 ? "nope, new output section\n"
2991 : "nope, didn't fit\n");
2993 // The section fails to fit in the current group. Set up a few
2994 // things for the next group. owner_ and output_section_ will be
2995 // set later after we've retrieved those values for the current
2997 this->state_
= FINDING_STUB_SECTION
;
2998 this->group_size_
= group_size
;
2999 this->group_start_addr_
= start_addr
;
3003 // Look over all the input sections, deciding where to place stubs.
3005 template<int size
, bool big_endian
>
3007 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
3009 bool no_size_errors
)
3011 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
3012 parameters
->options().stub_group_multi());
3014 // Group input sections and insert stub table
3015 Stub_table_owner
* table_owner
= NULL
;
3016 std::vector
<Stub_table_owner
*> tables
;
3017 Layout::Section_list section_list
;
3018 layout
->get_executable_sections(§ion_list
);
3019 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
3020 for (Layout::Section_list::iterator o
= section_list
.begin();
3021 o
!= section_list
.end();
3024 typedef Output_section::Input_section_list Input_section_list
;
3025 for (Input_section_list::const_iterator i
3026 = (*o
)->input_sections().begin();
3027 i
!= (*o
)->input_sections().end();
3030 if (i
->is_input_section()
3031 || i
->is_relaxed_input_section())
3033 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3034 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
3035 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
3036 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
3038 table_owner
->output_section
= stub_control
.output_section();
3039 table_owner
->owner
= stub_control
.owner();
3040 stub_control
.set_output_and_owner(*o
, &*i
);
3043 if (table_owner
== NULL
)
3045 table_owner
= new Stub_table_owner
;
3046 tables
.push_back(table_owner
);
3048 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
3052 if (table_owner
!= NULL
)
3054 table_owner
->output_section
= stub_control
.output_section();
3055 table_owner
->owner
= stub_control
.owner();;
3057 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
3061 Stub_table
<size
, big_endian
>* stub_table
;
3063 if ((*t
)->owner
->is_input_section())
3064 stub_table
= new Stub_table
<size
, big_endian
>(this,
3065 (*t
)->output_section
,
3067 this->stub_tables_
.size());
3068 else if ((*t
)->owner
->is_relaxed_input_section())
3069 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
3070 (*t
)->owner
->relaxed_input_section());
3073 this->stub_tables_
.push_back(stub_table
);
3078 static unsigned long
3079 max_branch_delta (unsigned int r_type
)
3081 if (r_type
== elfcpp::R_POWERPC_REL14
3082 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
3083 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
3085 if (r_type
== elfcpp::R_POWERPC_REL24
3086 || r_type
== elfcpp::R_PPC_PLTREL24
3087 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
3092 // Return whether this branch is going via a plt call stub.
3094 template<int size
, bool big_endian
>
3096 Target_powerpc
<size
, big_endian
>::Branch_info::mark_pltcall(
3097 Powerpc_relobj
<size
, big_endian
>* ppc_object
,
3100 Target_powerpc
* target
,
3101 Symbol_table
* symtab
)
3103 if (this->object_
!= ppc_object
3104 || this->shndx_
!= shndx
3105 || this->offset_
!= offset
)
3108 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3109 if (sym
!= NULL
&& sym
->is_forwarder())
3110 sym
= symtab
->resolve_forwards(sym
);
3111 if (target
->replace_tls_get_addr(sym
))
3112 sym
= target
->tls_get_addr_opt();
3113 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3115 ? (gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3116 && !target
->is_elfv2_localentry0(gsym
))
3117 : (this->object_
->local_has_plt_offset(this->r_sym_
)
3118 && !target
->is_elfv2_localentry0(this->object_
, this->r_sym_
)))
3126 // If this branch needs a plt call stub, or a long branch stub, make one.
3128 template<int size
, bool big_endian
>
3130 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
3131 Stub_table
<size
, big_endian
>* stub_table
,
3132 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
3133 Symbol_table
* symtab
) const
3135 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3136 Target_powerpc
<size
, big_endian
>* target
=
3137 static_cast<Target_powerpc
<size
, big_endian
>*>(
3138 parameters
->sized_target
<size
, big_endian
>());
3139 if (sym
!= NULL
&& sym
->is_forwarder())
3140 sym
= symtab
->resolve_forwards(sym
);
3141 if (target
->replace_tls_get_addr(sym
))
3142 sym
= target
->tls_get_addr_opt();
3143 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3147 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3148 : this->object_
->local_has_plt_offset(this->r_sym_
))
3152 && target
->abiversion() >= 2
3153 && !parameters
->options().output_is_position_independent()
3154 && !is_branch_reloc(this->r_type_
))
3155 target
->glink_section()->add_global_entry(gsym
);
3158 if (stub_table
== NULL
3161 && !parameters
->options().output_is_position_independent()
3162 && !is_branch_reloc(this->r_type_
)))
3163 stub_table
= this->object_
->stub_table(this->shndx_
);
3164 if (stub_table
== NULL
)
3166 // This is a ref from a data section to an ifunc symbol,
3167 // or a non-branch reloc for which we always want to use
3168 // one set of stubs for resolving function addresses.
3169 stub_table
= ifunc_stub_table
;
3171 gold_assert(stub_table
!= NULL
);
3172 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3173 if (from
!= invalid_address
)
3174 from
+= (this->object_
->output_section(this->shndx_
)->address()
3177 ok
= stub_table
->add_plt_call_entry(from
,
3178 this->object_
, gsym
,
3179 this->r_type_
, this->addend_
,
3182 ok
= stub_table
->add_plt_call_entry(from
,
3183 this->object_
, this->r_sym_
,
3184 this->r_type_
, this->addend_
,
3190 Address max_branch_offset
= max_branch_delta(this->r_type_
);
3191 if (max_branch_offset
== 0)
3193 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3194 gold_assert(from
!= invalid_address
);
3195 from
+= (this->object_
->output_section(this->shndx_
)->address()
3200 switch (gsym
->source())
3202 case Symbol::FROM_OBJECT
:
3204 Object
* symobj
= gsym
->object();
3205 if (symobj
->is_dynamic()
3206 || symobj
->pluginobj() != NULL
)
3209 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
3210 if (shndx
== elfcpp::SHN_UNDEF
)
3215 case Symbol::IS_UNDEFINED
:
3221 Symbol_table::Compute_final_value_status status
;
3222 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
3223 if (status
!= Symbol_table::CFVS_OK
)
3226 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
3230 const Symbol_value
<size
>* psymval
3231 = this->object_
->local_symbol(this->r_sym_
);
3232 Symbol_value
<size
> symval
;
3233 if (psymval
->is_section_symbol())
3234 symval
.set_is_section_symbol();
3235 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
3236 typename
ObjType::Compute_final_local_value_status status
3237 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
3239 if (status
!= ObjType::CFLV_OK
3240 || !symval
.has_output_value())
3242 to
= symval
.value(this->object_
, 0);
3244 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
3246 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
3247 to
+= this->addend_
;
3248 if (stub_table
== NULL
)
3249 stub_table
= this->object_
->stub_table(this->shndx_
);
3250 if (size
== 64 && target
->abiversion() < 2)
3252 unsigned int dest_shndx
;
3253 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
3257 Address delta
= to
- from
;
3258 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
3260 if (stub_table
== NULL
)
3262 gold_warning(_("%s:%s: branch in non-executable section,"
3263 " no long branch stub for you"),
3264 this->object_
->name().c_str(),
3265 this->object_
->section_name(this->shndx_
).c_str());
3268 bool save_res
= (size
== 64
3270 && gsym
->source() == Symbol::IN_OUTPUT_DATA
3271 && gsym
->output_data() == target
->savres_section());
3272 ok
= stub_table
->add_long_branch_entry(this->object_
,
3274 from
, to
, save_res
);
3278 gold_debug(DEBUG_TARGET
,
3279 "branch at %s:%s+%#lx\n"
3280 "can't reach stub attached to %s:%s",
3281 this->object_
->name().c_str(),
3282 this->object_
->section_name(this->shndx_
).c_str(),
3283 (unsigned long) this->offset_
,
3284 stub_table
->relobj()->name().c_str(),
3285 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3290 // Relaxation hook. This is where we do stub generation.
3292 template<int size
, bool big_endian
>
3294 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3295 const Input_objects
*,
3296 Symbol_table
* symtab
,
3300 unsigned int prev_brlt_size
= 0;
3304 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3306 && this->abiversion() < 2
3308 && !parameters
->options().user_set_plt_thread_safe())
3310 static const char* const thread_starter
[] =
3314 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3316 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3317 "mq_notify", "create_timer",
3322 "GOMP_parallel_start",
3323 "GOMP_parallel_loop_static",
3324 "GOMP_parallel_loop_static_start",
3325 "GOMP_parallel_loop_dynamic",
3326 "GOMP_parallel_loop_dynamic_start",
3327 "GOMP_parallel_loop_guided",
3328 "GOMP_parallel_loop_guided_start",
3329 "GOMP_parallel_loop_runtime",
3330 "GOMP_parallel_loop_runtime_start",
3331 "GOMP_parallel_sections",
3332 "GOMP_parallel_sections_start",
3337 if (parameters
->options().shared())
3341 for (unsigned int i
= 0;
3342 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3345 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3346 thread_safe
= (sym
!= NULL
3348 && sym
->in_real_elf());
3354 this->plt_thread_safe_
= thread_safe
;
3359 this->stub_group_size_
= parameters
->options().stub_group_size();
3360 bool no_size_errors
= true;
3361 if (this->stub_group_size_
== 1)
3362 this->stub_group_size_
= 0x1c00000;
3363 else if (this->stub_group_size_
== -1)
3364 this->stub_group_size_
= -0x1e00000;
3366 no_size_errors
= false;
3367 this->group_sections(layout
, task
, no_size_errors
);
3369 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3371 this->branch_lookup_table_
.clear();
3372 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3373 p
!= this->stub_tables_
.end();
3376 (*p
)->clear_stubs(true);
3378 this->stub_tables_
.clear();
3379 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3380 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3381 program_name
, this->stub_group_size_
);
3382 this->group_sections(layout
, task
, true);
3385 // We need address of stub tables valid for make_stub.
3386 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3387 p
!= this->stub_tables_
.end();
3390 const Powerpc_relobj
<size
, big_endian
>* object
3391 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3392 Address off
= object
->get_output_section_offset((*p
)->shndx());
3393 gold_assert(off
!= invalid_address
);
3394 Output_section
* os
= (*p
)->output_section();
3395 (*p
)->set_address_and_size(os
, off
);
3400 // Clear plt call stubs, long branch stubs and branch lookup table.
3401 prev_brlt_size
= this->branch_lookup_table_
.size();
3402 this->branch_lookup_table_
.clear();
3403 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3404 p
!= this->stub_tables_
.end();
3407 (*p
)->clear_stubs(false);
3411 // Build all the stubs.
3412 this->relax_failed_
= false;
3413 Stub_table
<size
, big_endian
>* ifunc_stub_table
3414 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3415 Stub_table
<size
, big_endian
>* one_stub_table
3416 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3417 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3418 b
!= this->branch_info_
.end();
3421 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3422 && !this->relax_failed_
)
3424 this->relax_failed_
= true;
3425 this->relax_fail_count_
++;
3426 if (this->relax_fail_count_
< 3)
3431 // Did anything change size?
3432 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3433 bool again
= num_huge_branches
!= prev_brlt_size
;
3434 if (size
== 64 && num_huge_branches
!= 0)
3435 this->make_brlt_section(layout
);
3436 if (size
== 64 && again
)
3437 this->brlt_section_
->set_current_size(num_huge_branches
);
3439 for (typename
Stub_tables::reverse_iterator p
= this->stub_tables_
.rbegin();
3440 p
!= this->stub_tables_
.rend();
3442 (*p
)->remove_eh_frame(layout
);
3444 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3445 p
!= this->stub_tables_
.end();
3447 (*p
)->add_eh_frame(layout
);
3449 typedef Unordered_set
<Output_section
*> Output_sections
;
3450 Output_sections os_need_update
;
3451 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3452 p
!= this->stub_tables_
.end();
3455 if ((*p
)->size_update())
3458 os_need_update
.insert((*p
)->output_section());
3462 // Set output section offsets for all input sections in an output
3463 // section that just changed size. Anything past the stubs will
3465 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3466 p
!= os_need_update
.end();
3469 Output_section
* os
= *p
;
3471 typedef Output_section::Input_section_list Input_section_list
;
3472 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3473 i
!= os
->input_sections().end();
3476 off
= align_address(off
, i
->addralign());
3477 if (i
->is_input_section() || i
->is_relaxed_input_section())
3478 i
->relobj()->set_section_offset(i
->shndx(), off
);
3479 if (i
->is_relaxed_input_section())
3481 Stub_table
<size
, big_endian
>* stub_table
3482 = static_cast<Stub_table
<size
, big_endian
>*>(
3483 i
->relaxed_input_section());
3484 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3485 off
+= stub_table_size
;
3486 // After a few iterations, set current stub table size
3487 // as min size threshold, so later stub tables can only
3490 stub_table
->set_min_size_threshold(stub_table_size
);
3493 off
+= i
->data_size();
3495 // If .branch_lt is part of this output section, then we have
3496 // just done the offset adjustment.
3497 os
->clear_section_offsets_need_adjustment();
3502 && num_huge_branches
!= 0
3503 && parameters
->options().output_is_position_independent())
3505 // Fill in the BRLT relocs.
3506 this->brlt_section_
->reset_brlt_sizes();
3507 for (typename
Branch_lookup_table::const_iterator p
3508 = this->branch_lookup_table_
.begin();
3509 p
!= this->branch_lookup_table_
.end();
3512 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3514 this->brlt_section_
->finalize_brlt_sizes();
3518 && (parameters
->options().user_set_emit_stub_syms()
3519 ? parameters
->options().emit_stub_syms()
3521 || parameters
->options().output_is_position_independent()
3522 || parameters
->options().emit_relocs())))
3524 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3525 p
!= this->stub_tables_
.end();
3527 (*p
)->define_stub_syms(symtab
);
3529 if (this->glink_
!= NULL
)
3531 int stub_size
= this->glink_
->pltresolve_size();
3532 Address value
= -stub_size
;
3538 this->define_local(symtab
, "__glink_PLTresolve",
3539 this->glink_
, value
, stub_size
);
3542 this->define_local(symtab
, "__glink", this->glink_
, 0, 0);
3549 template<int size
, bool big_endian
>
3551 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3552 unsigned char* oview
,
3556 uint64_t address
= plt
->address();
3557 off_t len
= plt
->data_size();
3559 if (plt
== this->glink_
)
3561 // See Output_data_glink::do_write() for glink contents.
3564 gold_assert(parameters
->doing_static_link());
3565 // Static linking may need stubs, to support ifunc and long
3566 // branches. We need to create an output section for
3567 // .eh_frame early in the link process, to have a place to
3568 // attach stub .eh_frame info. We also need to have
3569 // registered a CIE that matches the stub CIE. Both of
3570 // these requirements are satisfied by creating an FDE and
3571 // CIE for .glink, even though static linking will leave
3572 // .glink zero length.
3573 // ??? Hopefully generating an FDE with a zero address range
3574 // won't confuse anything that consumes .eh_frame info.
3576 else if (size
== 64)
3578 // There is one word before __glink_PLTresolve
3582 else if (parameters
->options().output_is_position_independent())
3584 // There are two FDEs for a position independent glink.
3585 // The first covers the branch table, the second
3586 // __glink_PLTresolve at the end of glink.
3587 off_t resolve_size
= this->glink_
->pltresolve_size();
3588 if (oview
[9] == elfcpp::DW_CFA_nop
)
3589 len
-= resolve_size
;
3592 address
+= len
- resolve_size
;
3599 // Must be a stub table.
3600 const Stub_table
<size
, big_endian
>* stub_table
3601 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3602 uint64_t stub_address
= stub_table
->stub_address();
3603 len
-= stub_address
- address
;
3604 address
= stub_address
;
3607 *paddress
= address
;
3611 // A class to handle the PLT data.
3613 template<int size
, bool big_endian
>
3614 class Output_data_plt_powerpc
: public Output_section_data_build
3617 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3618 size
, big_endian
> Reloc_section
;
3620 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3621 Reloc_section
* plt_rel
,
3623 : Output_section_data_build(size
== 32 ? 4 : 8),
3629 // Add an entry to the PLT.
3634 add_ifunc_entry(Symbol
*);
3637 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3639 // Return the .rela.plt section data.
3646 // Return the number of PLT entries.
3650 if (this->current_data_size() == 0)
3652 return ((this->current_data_size() - this->first_plt_entry_offset())
3653 / this->plt_entry_size());
3658 do_adjust_output_section(Output_section
* os
)
3663 // Write to a map file.
3665 do_print_to_mapfile(Mapfile
* mapfile
) const
3666 { mapfile
->print_output_data(this, this->name_
); }
3669 // Return the offset of the first non-reserved PLT entry.
3671 first_plt_entry_offset() const
3673 // IPLT has no reserved entry.
3674 if (this->name_
[3] == 'I')
3676 return this->targ_
->first_plt_entry_offset();
3679 // Return the size of each PLT entry.
3681 plt_entry_size() const
3683 return this->targ_
->plt_entry_size();
3686 // Write out the PLT data.
3688 do_write(Output_file
*);
3690 // The reloc section.
3691 Reloc_section
* rel_
;
3692 // Allows access to .glink for do_write.
3693 Target_powerpc
<size
, big_endian
>* targ_
;
3694 // What to report in map file.
3698 // Add an entry to the PLT.
3700 template<int size
, bool big_endian
>
3702 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3704 if (!gsym
->has_plt_offset())
3706 section_size_type off
= this->current_data_size();
3708 off
+= this->first_plt_entry_offset();
3709 gsym
->set_plt_offset(off
);
3710 gsym
->set_needs_dynsym_entry();
3711 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3712 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3713 off
+= this->plt_entry_size();
3714 this->set_current_data_size(off
);
3718 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3720 template<int size
, bool big_endian
>
3722 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3724 if (!gsym
->has_plt_offset())
3726 section_size_type off
= this->current_data_size();
3727 gsym
->set_plt_offset(off
);
3728 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3729 if (size
== 64 && this->targ_
->abiversion() < 2)
3730 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3731 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3732 off
+= this->plt_entry_size();
3733 this->set_current_data_size(off
);
3737 // Add an entry for a local ifunc symbol to the IPLT.
3739 template<int size
, bool big_endian
>
3741 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3742 Sized_relobj_file
<size
, big_endian
>* relobj
,
3743 unsigned int local_sym_index
)
3745 if (!relobj
->local_has_plt_offset(local_sym_index
))
3747 section_size_type off
= this->current_data_size();
3748 relobj
->set_local_plt_offset(local_sym_index
, off
);
3749 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3750 if (size
== 64 && this->targ_
->abiversion() < 2)
3751 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3752 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3754 off
+= this->plt_entry_size();
3755 this->set_current_data_size(off
);
3759 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3760 static const uint32_t add_2_2_11
= 0x7c425a14;
3761 static const uint32_t add_2_2_12
= 0x7c426214;
3762 static const uint32_t add_3_3_2
= 0x7c631214;
3763 static const uint32_t add_3_3_13
= 0x7c636a14;
3764 static const uint32_t add_3_12_2
= 0x7c6c1214;
3765 static const uint32_t add_3_12_13
= 0x7c6c6a14;
3766 static const uint32_t add_11_0_11
= 0x7d605a14;
3767 static const uint32_t add_11_2_11
= 0x7d625a14;
3768 static const uint32_t add_11_11_2
= 0x7d6b1214;
3769 static const uint32_t addi_0_12
= 0x380c0000;
3770 static const uint32_t addi_2_2
= 0x38420000;
3771 static const uint32_t addi_3_3
= 0x38630000;
3772 static const uint32_t addi_11_11
= 0x396b0000;
3773 static const uint32_t addi_12_1
= 0x39810000;
3774 static const uint32_t addi_12_12
= 0x398c0000;
3775 static const uint32_t addis_0_2
= 0x3c020000;
3776 static const uint32_t addis_0_13
= 0x3c0d0000;
3777 static const uint32_t addis_2_12
= 0x3c4c0000;
3778 static const uint32_t addis_11_2
= 0x3d620000;
3779 static const uint32_t addis_11_11
= 0x3d6b0000;
3780 static const uint32_t addis_11_30
= 0x3d7e0000;
3781 static const uint32_t addis_12_1
= 0x3d810000;
3782 static const uint32_t addis_12_2
= 0x3d820000;
3783 static const uint32_t addis_12_12
= 0x3d8c0000;
3784 static const uint32_t b
= 0x48000000;
3785 static const uint32_t bcl_20_31
= 0x429f0005;
3786 static const uint32_t bctr
= 0x4e800420;
3787 static const uint32_t bctrl
= 0x4e800421;
3788 static const uint32_t beqlr
= 0x4d820020;
3789 static const uint32_t blr
= 0x4e800020;
3790 static const uint32_t bnectr_p4
= 0x4ce20420;
3791 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3792 static const uint32_t cmpldi_2_0
= 0x28220000;
3793 static const uint32_t cmpdi_11_0
= 0x2c2b0000;
3794 static const uint32_t cmpwi_11_0
= 0x2c0b0000;
3795 static const uint32_t cror_15_15_15
= 0x4def7b82;
3796 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3797 static const uint32_t ld_0_1
= 0xe8010000;
3798 static const uint32_t ld_0_12
= 0xe80c0000;
3799 static const uint32_t ld_2_1
= 0xe8410000;
3800 static const uint32_t ld_2_2
= 0xe8420000;
3801 static const uint32_t ld_2_11
= 0xe84b0000;
3802 static const uint32_t ld_2_12
= 0xe84c0000;
3803 static const uint32_t ld_11_1
= 0xe9610000;
3804 static const uint32_t ld_11_2
= 0xe9620000;
3805 static const uint32_t ld_11_3
= 0xe9630000;
3806 static const uint32_t ld_11_11
= 0xe96b0000;
3807 static const uint32_t ld_12_2
= 0xe9820000;
3808 static const uint32_t ld_12_3
= 0xe9830000;
3809 static const uint32_t ld_12_11
= 0xe98b0000;
3810 static const uint32_t ld_12_12
= 0xe98c0000;
3811 static const uint32_t lfd_0_1
= 0xc8010000;
3812 static const uint32_t li_0_0
= 0x38000000;
3813 static const uint32_t li_12_0
= 0x39800000;
3814 static const uint32_t lis_0
= 0x3c000000;
3815 static const uint32_t lis_2
= 0x3c400000;
3816 static const uint32_t lis_11
= 0x3d600000;
3817 static const uint32_t lis_12
= 0x3d800000;
3818 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3819 static const uint32_t lwz_0_12
= 0x800c0000;
3820 static const uint32_t lwz_11_3
= 0x81630000;
3821 static const uint32_t lwz_11_11
= 0x816b0000;
3822 static const uint32_t lwz_11_30
= 0x817e0000;
3823 static const uint32_t lwz_12_3
= 0x81830000;
3824 static const uint32_t lwz_12_12
= 0x818c0000;
3825 static const uint32_t lwzu_0_12
= 0x840c0000;
3826 static const uint32_t mflr_0
= 0x7c0802a6;
3827 static const uint32_t mflr_11
= 0x7d6802a6;
3828 static const uint32_t mflr_12
= 0x7d8802a6;
3829 static const uint32_t mr_0_3
= 0x7c601b78;
3830 static const uint32_t mr_3_0
= 0x7c030378;
3831 static const uint32_t mtctr_0
= 0x7c0903a6;
3832 static const uint32_t mtctr_11
= 0x7d6903a6;
3833 static const uint32_t mtctr_12
= 0x7d8903a6;
3834 static const uint32_t mtlr_0
= 0x7c0803a6;
3835 static const uint32_t mtlr_11
= 0x7d6803a6;
3836 static const uint32_t mtlr_12
= 0x7d8803a6;
3837 static const uint32_t nop
= 0x60000000;
3838 static const uint32_t ori_0_0_0
= 0x60000000;
3839 static const uint32_t srdi_0_0_2
= 0x7800f082;
3840 static const uint32_t std_0_1
= 0xf8010000;
3841 static const uint32_t std_0_12
= 0xf80c0000;
3842 static const uint32_t std_2_1
= 0xf8410000;
3843 static const uint32_t std_11_1
= 0xf9610000;
3844 static const uint32_t stfd_0_1
= 0xd8010000;
3845 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3846 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3847 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3848 static const uint32_t xor_2_12_12
= 0x7d826278;
3849 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3851 // Write out the PLT.
3853 template<int size
, bool big_endian
>
3855 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3857 if (size
== 32 && this->name_
[3] != 'I')
3859 const section_size_type offset
= this->offset();
3860 const section_size_type oview_size
3861 = convert_to_section_size_type(this->data_size());
3862 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3863 unsigned char* pov
= oview
;
3864 unsigned char* endpov
= oview
+ oview_size
;
3866 // The address of the .glink branch table
3867 const Output_data_glink
<size
, big_endian
>* glink
3868 = this->targ_
->glink_section();
3869 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3871 while (pov
< endpov
)
3873 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3878 of
->write_output_view(offset
, oview_size
, oview
);
3882 // Create the PLT section.
3884 template<int size
, bool big_endian
>
3886 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3889 if (this->plt_
== NULL
)
3891 if (this->got_
== NULL
)
3892 this->got_section(symtab
, layout
);
3894 if (this->glink_
== NULL
)
3895 make_glink_section(layout
);
3897 // Ensure that .rela.dyn always appears before .rela.plt This is
3898 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3899 // needs to include .rela.plt in its range.
3900 this->rela_dyn_section(layout
);
3902 Reloc_section
* plt_rel
= new Reloc_section(false);
3903 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3904 elfcpp::SHF_ALLOC
, plt_rel
,
3905 ORDER_DYNAMIC_PLT_RELOCS
, false);
3907 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3909 layout
->add_output_section_data(".plt",
3911 ? elfcpp::SHT_PROGBITS
3912 : elfcpp::SHT_NOBITS
),
3913 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3920 Output_section
* rela_plt_os
= plt_rel
->output_section();
3921 rela_plt_os
->set_info_section(this->plt_
->output_section());
3925 // Create the IPLT section.
3927 template<int size
, bool big_endian
>
3929 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3932 if (this->iplt_
== NULL
)
3934 this->make_plt_section(symtab
, layout
);
3936 Reloc_section
* iplt_rel
= new Reloc_section(false);
3937 if (this->rela_dyn_
->output_section())
3938 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3940 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3942 if (this->plt_
->output_section())
3943 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3947 // A section for huge long branch addresses, similar to plt section.
3949 template<int size
, bool big_endian
>
3950 class Output_data_brlt_powerpc
: public Output_section_data_build
3953 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3954 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3955 size
, big_endian
> Reloc_section
;
3957 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3958 Reloc_section
* brlt_rel
)
3959 : Output_section_data_build(size
== 32 ? 4 : 8),
3967 this->reset_data_size();
3968 this->rel_
->reset_data_size();
3972 finalize_brlt_sizes()
3974 this->finalize_data_size();
3975 this->rel_
->finalize_data_size();
3978 // Add a reloc for an entry in the BRLT.
3980 add_reloc(Address to
, unsigned int off
)
3981 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3983 // Update section and reloc section size.
3985 set_current_size(unsigned int num_branches
)
3987 this->reset_address_and_file_offset();
3988 this->set_current_data_size(num_branches
* 16);
3989 this->finalize_data_size();
3990 Output_section
* os
= this->output_section();
3991 os
->set_section_offsets_need_adjustment();
3992 if (this->rel_
!= NULL
)
3994 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3995 this->rel_
->reset_address_and_file_offset();
3996 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3997 this->rel_
->finalize_data_size();
3998 Output_section
* os
= this->rel_
->output_section();
3999 os
->set_section_offsets_need_adjustment();
4005 do_adjust_output_section(Output_section
* os
)
4010 // Write to a map file.
4012 do_print_to_mapfile(Mapfile
* mapfile
) const
4013 { mapfile
->print_output_data(this, "** BRLT"); }
4016 // Write out the BRLT data.
4018 do_write(Output_file
*);
4020 // The reloc section.
4021 Reloc_section
* rel_
;
4022 Target_powerpc
<size
, big_endian
>* targ_
;
4025 // Make the branch lookup table section.
4027 template<int size
, bool big_endian
>
4029 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
4031 if (size
== 64 && this->brlt_section_
== NULL
)
4033 Reloc_section
* brlt_rel
= NULL
;
4034 bool is_pic
= parameters
->options().output_is_position_independent();
4037 // When PIC we can't fill in .branch_lt (like .plt it can be
4038 // a bss style section) but must initialise at runtime via
4039 // dynamic relocations.
4040 this->rela_dyn_section(layout
);
4041 brlt_rel
= new Reloc_section(false);
4042 if (this->rela_dyn_
->output_section())
4043 this->rela_dyn_
->output_section()
4044 ->add_output_section_data(brlt_rel
);
4047 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
4048 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
4049 this->plt_
->output_section()
4050 ->add_output_section_data(this->brlt_section_
);
4052 layout
->add_output_section_data(".branch_lt",
4053 (is_pic
? elfcpp::SHT_NOBITS
4054 : elfcpp::SHT_PROGBITS
),
4055 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4056 this->brlt_section_
,
4057 (is_pic
? ORDER_SMALL_BSS
4058 : ORDER_SMALL_DATA
),
4063 // Write out .branch_lt when non-PIC.
4065 template<int size
, bool big_endian
>
4067 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
4069 if (size
== 64 && !parameters
->options().output_is_position_independent())
4071 const section_size_type offset
= this->offset();
4072 const section_size_type oview_size
4073 = convert_to_section_size_type(this->data_size());
4074 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
4076 this->targ_
->write_branch_lookup_table(oview
);
4077 of
->write_output_view(offset
, oview_size
, oview
);
4081 static inline uint32_t
4087 static inline uint32_t
4093 static inline uint32_t
4096 return hi(a
+ 0x8000);
4102 static const unsigned char eh_frame_cie
[12];
4106 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
4109 'z', 'R', 0, // Augmentation string.
4110 4, // Code alignment.
4111 0x80 - size
/ 8 , // Data alignment.
4113 1, // Augmentation size.
4114 (elfcpp::DW_EH_PE_pcrel
4115 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
4116 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
4119 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
4120 static const unsigned char glink_eh_frame_fde_64v1
[] =
4122 0, 0, 0, 0, // Replaced with offset to .glink.
4123 0, 0, 0, 0, // Replaced with size of .glink.
4124 0, // Augmentation size.
4125 elfcpp::DW_CFA_advance_loc
+ 1,
4126 elfcpp::DW_CFA_register
, 65, 12,
4127 elfcpp::DW_CFA_advance_loc
+ 5,
4128 elfcpp::DW_CFA_restore_extended
, 65
4131 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
4132 static const unsigned char glink_eh_frame_fde_64v2
[] =
4134 0, 0, 0, 0, // Replaced with offset to .glink.
4135 0, 0, 0, 0, // Replaced with size of .glink.
4136 0, // Augmentation size.
4137 elfcpp::DW_CFA_advance_loc
+ 1,
4138 elfcpp::DW_CFA_register
, 65, 0,
4139 elfcpp::DW_CFA_advance_loc
+ 7,
4140 elfcpp::DW_CFA_restore_extended
, 65
4143 // Describe __glink_PLTresolve use of LR, 32-bit version.
4144 static const unsigned char glink_eh_frame_fde_32
[] =
4146 0, 0, 0, 0, // Replaced with offset to .glink.
4147 0, 0, 0, 0, // Replaced with size of .glink.
4148 0, // Augmentation size.
4149 elfcpp::DW_CFA_advance_loc
+ 2,
4150 elfcpp::DW_CFA_register
, 65, 0,
4151 elfcpp::DW_CFA_advance_loc
+ 4,
4152 elfcpp::DW_CFA_restore_extended
, 65
4155 static const unsigned char default_fde
[] =
4157 0, 0, 0, 0, // Replaced with offset to stubs.
4158 0, 0, 0, 0, // Replaced with size of stubs.
4159 0, // Augmentation size.
4160 elfcpp::DW_CFA_nop
, // Pad.
4165 template<bool big_endian
>
4167 write_insn(unsigned char* p
, uint32_t v
)
4169 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
4173 static inline unsigned int
4176 if (!parameters
->options().user_set_plt_align())
4177 return size
== 64 ? 32 : 8;
4178 return 1 << parameters
->options().plt_align();
4181 // Stub_table holds information about plt and long branch stubs.
4182 // Stubs are built in an area following some input section determined
4183 // by group_sections(). This input section is converted to a relaxed
4184 // input section allowing it to be resized to accommodate the stubs
4186 template<int size
, bool big_endian
>
4187 class Stub_table
: public Output_relaxed_input_section
4192 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4193 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4197 unsigned int indx_
: 30;
4198 unsigned int r2save_
: 1;
4199 unsigned int localentry0_
: 1;
4201 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4202 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4204 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4205 Output_section
* output_section
,
4206 const Output_section::Input_section
* owner
,
4208 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4210 ->section_addralign(owner
->shndx())),
4211 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4212 orig_data_size_(owner
->current_data_size()),
4213 plt_size_(0), last_plt_size_(0),
4214 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4215 need_save_res_(false), uniq_(id
), tls_get_addr_opt_bctrl_(-1u),
4218 this->set_output_section(output_section
);
4220 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4221 new_relaxed
.push_back(this);
4222 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4225 // Add a plt call stub.
4227 add_plt_call_entry(Address
,
4228 const Sized_relobj_file
<size
, big_endian
>*,
4235 add_plt_call_entry(Address
,
4236 const Sized_relobj_file
<size
, big_endian
>*,
4242 // Find a given plt call stub.
4244 find_plt_call_entry(const Symbol
*) const;
4247 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4248 unsigned int) const;
4251 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4257 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4262 // Add a long branch stub.
4264 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4265 unsigned int, Address
, Address
, bool);
4268 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4272 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4274 Address max_branch_offset
= max_branch_delta(r_type
);
4275 if (max_branch_offset
== 0)
4277 gold_assert(from
!= invalid_address
);
4278 Address loc
= off
+ this->stub_address();
4279 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4283 clear_stubs(bool all
)
4285 this->plt_call_stubs_
.clear();
4286 this->plt_size_
= 0;
4287 this->long_branch_stubs_
.clear();
4288 this->branch_size_
= 0;
4289 this->need_save_res_
= false;
4292 this->last_plt_size_
= 0;
4293 this->last_branch_size_
= 0;
4298 set_address_and_size(const Output_section
* os
, Address off
)
4300 Address start_off
= off
;
4301 off
+= this->orig_data_size_
;
4302 Address my_size
= this->plt_size_
+ this->branch_size_
;
4303 if (this->need_save_res_
)
4304 my_size
+= this->targ_
->savres_section()->data_size();
4306 off
= align_address(off
, this->stub_align());
4307 // Include original section size and alignment padding in size
4308 my_size
+= off
- start_off
;
4309 // Ensure new size is always larger than min size
4310 // threshold. Alignment requirement is included in "my_size", so
4311 // increase "my_size" does not invalidate alignment.
4312 if (my_size
< this->min_size_threshold_
)
4313 my_size
= this->min_size_threshold_
;
4314 this->reset_address_and_file_offset();
4315 this->set_current_data_size(my_size
);
4316 this->set_address_and_file_offset(os
->address() + start_off
,
4317 os
->offset() + start_off
);
4322 stub_address() const
4324 return align_address(this->address() + this->orig_data_size_
,
4325 this->stub_align());
4331 return align_address(this->offset() + this->orig_data_size_
,
4332 this->stub_align());
4337 { return this->plt_size_
; }
4340 set_min_size_threshold(Address min_size
)
4341 { this->min_size_threshold_
= min_size
; }
4344 define_stub_syms(Symbol_table
*);
4349 Output_section
* os
= this->output_section();
4350 if (os
->addralign() < this->stub_align())
4352 os
->set_addralign(this->stub_align());
4353 // FIXME: get rid of the insane checkpointing.
4354 // We can't increase alignment of the input section to which
4355 // stubs are attached; The input section may be .init which
4356 // is pasted together with other .init sections to form a
4357 // function. Aligning might insert zero padding resulting in
4358 // sigill. However we do need to increase alignment of the
4359 // output section so that the align_address() on offset in
4360 // set_address_and_size() adds the same padding as the
4361 // align_address() on address in stub_address().
4362 // What's more, we need this alignment for the layout done in
4363 // relaxation_loop_body() so that the output section starts at
4364 // a suitably aligned address.
4365 os
->checkpoint_set_addralign(this->stub_align());
4367 if (this->last_plt_size_
!= this->plt_size_
4368 || this->last_branch_size_
!= this->branch_size_
)
4370 this->last_plt_size_
= this->plt_size_
;
4371 this->last_branch_size_
= this->branch_size_
;
4377 // Generate a suitable FDE to describe code in this stub group.
4381 // Add .eh_frame info for this stub section.
4383 add_eh_frame(Layout
* layout
);
4385 // Remove .eh_frame info for this stub section.
4387 remove_eh_frame(Layout
* layout
);
4389 Target_powerpc
<size
, big_endian
>*
4395 class Plt_stub_key_hash
;
4396 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4397 Plt_stub_key_hash
> Plt_stub_entries
;
4398 class Branch_stub_ent
;
4399 class Branch_stub_ent_hash
;
4400 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4401 Branch_stub_ent_hash
> Branch_stub_entries
;
4403 // Alignment of stub section.
4407 unsigned int min_align
= size
== 64 ? 32 : 16;
4408 unsigned int user_align
= 1 << parameters
->options().plt_align();
4409 return std::max(user_align
, min_align
);
4412 // Return the plt offset for the given call stub.
4414 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4416 const Symbol
* gsym
= p
->first
.sym_
;
4419 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4420 && gsym
->can_use_relative_reloc(false));
4421 return gsym
->plt_offset();
4426 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4427 unsigned int local_sym_index
= p
->first
.locsym_
;
4428 return relobj
->local_plt_offset(local_sym_index
);
4432 // Size of a given plt call stub.
4434 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4438 const Symbol
* gsym
= p
->first
.sym_
;
4440 + (this->targ_
->is_tls_get_addr_opt(gsym
) ? 8 * 4 : 0));
4444 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4446 plt_addr
+= this->targ_
->iplt_section()->address();
4448 plt_addr
+= this->targ_
->plt_section()->address();
4449 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4450 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4451 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4452 got_addr
+= ppcobj
->toc_base_offset();
4453 Address off
= plt_addr
- got_addr
;
4454 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4455 const Symbol
* gsym
= p
->first
.sym_
;
4456 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4458 if (this->targ_
->abiversion() < 2)
4460 bool static_chain
= parameters
->options().plt_static_chain();
4461 bool thread_safe
= this->targ_
->plt_thread_safe();
4465 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4471 plt_call_align(unsigned int bytes
) const
4473 unsigned int align
= param_plt_align
<size
>();
4474 return (bytes
+ align
- 1) & -align
;
4477 // Return long branch stub size.
4479 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4481 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4482 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4484 unsigned int bytes
= 16;
4485 if (size
== 32 && parameters
->options().output_is_position_independent())
4492 do_write(Output_file
*);
4494 // Plt call stub keys.
4498 Plt_stub_key(const Symbol
* sym
)
4499 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4502 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4503 unsigned int locsym_index
)
4504 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4507 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4509 unsigned int r_type
,
4511 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4514 this->addend_
= addend
;
4515 else if (parameters
->options().output_is_position_independent()
4516 && r_type
== elfcpp::R_PPC_PLTREL24
)
4518 this->addend_
= addend
;
4519 if (this->addend_
>= 32768)
4520 this->object_
= object
;
4524 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4525 unsigned int locsym_index
,
4526 unsigned int r_type
,
4528 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4531 this->addend_
= addend
;
4532 else if (parameters
->options().output_is_position_independent()
4533 && r_type
== elfcpp::R_PPC_PLTREL24
)
4534 this->addend_
= addend
;
4537 bool operator==(const Plt_stub_key
& that
) const
4539 return (this->sym_
== that
.sym_
4540 && this->object_
== that
.object_
4541 && this->addend_
== that
.addend_
4542 && this->locsym_
== that
.locsym_
);
4546 const Sized_relobj_file
<size
, big_endian
>* object_
;
4547 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4548 unsigned int locsym_
;
4551 class Plt_stub_key_hash
4554 size_t operator()(const Plt_stub_key
& ent
) const
4556 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4557 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4563 // Long branch stub keys.
4564 class Branch_stub_ent
4567 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4568 Address to
, bool save_res
)
4569 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4572 toc_base_off_
= obj
->toc_base_offset();
4575 bool operator==(const Branch_stub_ent
& that
) const
4577 return (this->dest_
== that
.dest_
4579 || this->toc_base_off_
== that
.toc_base_off_
));
4583 unsigned int toc_base_off_
;
4587 class Branch_stub_ent_hash
4590 size_t operator()(const Branch_stub_ent
& ent
) const
4591 { return ent
.dest_
^ ent
.toc_base_off_
; }
4594 // In a sane world this would be a global.
4595 Target_powerpc
<size
, big_endian
>* targ_
;
4596 // Map sym/object/addend to stub offset.
4597 Plt_stub_entries plt_call_stubs_
;
4598 // Map destination address to stub offset.
4599 Branch_stub_entries long_branch_stubs_
;
4600 // size of input section
4601 section_size_type orig_data_size_
;
4603 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4604 // Some rare cases cause (PR/20529) fluctuation in stub table
4605 // size, which leads to an endless relax loop. This is to be fixed
4606 // by, after the first few iterations, allowing only increase of
4607 // stub table size. This variable sets the minimal possible size of
4608 // a stub table, it is zero for the first few iterations, then
4609 // increases monotonically.
4610 Address min_size_threshold_
;
4611 // Set if this stub group needs a copy of out-of-line register
4612 // save/restore functions.
4613 bool need_save_res_
;
4614 // Per stub table unique identifier.
4616 // The bctrl in the __tls_get_addr_opt stub, if present.
4617 unsigned int tls_get_addr_opt_bctrl_
;
4618 // FDE unwind info for this stub group.
4619 unsigned int plt_fde_len_
;
4620 unsigned char plt_fde_
[20];
4623 // Add a plt call stub, if we do not already have one for this
4624 // sym/object/addend combo.
4626 template<int size
, bool big_endian
>
4628 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4630 const Sized_relobj_file
<size
, big_endian
>* object
,
4632 unsigned int r_type
,
4636 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4637 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4638 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4639 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4642 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4644 && this->targ_
->is_elfv2_localentry0(gsym
))
4646 p
.first
->second
.localentry0_
= 1;
4647 this->targ_
->set_has_localentry0();
4649 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4651 this->targ_
->set_has_tls_get_addr_opt();
4652 this->tls_get_addr_opt_bctrl_
= this->plt_size_
- 5 * 4;
4654 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4658 && !p
.first
->second
.localentry0_
)
4659 p
.first
->second
.r2save_
= 1;
4660 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4663 template<int size
, bool big_endian
>
4665 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4667 const Sized_relobj_file
<size
, big_endian
>* object
,
4668 unsigned int locsym_index
,
4669 unsigned int r_type
,
4673 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4674 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4675 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4676 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4679 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4680 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4682 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4684 p
.first
->second
.localentry0_
= 1;
4685 this->targ_
->set_has_localentry0();
4690 && !p
.first
->second
.localentry0_
)
4691 p
.first
->second
.r2save_
= 1;
4692 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4695 // Find a plt call stub.
4697 template<int size
, bool big_endian
>
4698 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4699 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4700 const Sized_relobj_file
<size
, big_endian
>* object
,
4702 unsigned int r_type
,
4703 Address addend
) const
4705 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4706 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4707 if (p
== this->plt_call_stubs_
.end())
4712 template<int size
, bool big_endian
>
4713 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4714 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4716 Plt_stub_key
key(gsym
);
4717 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4718 if (p
== this->plt_call_stubs_
.end())
4723 template<int size
, bool big_endian
>
4724 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4725 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4726 const Sized_relobj_file
<size
, big_endian
>* object
,
4727 unsigned int locsym_index
,
4728 unsigned int r_type
,
4729 Address addend
) const
4731 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4732 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4733 if (p
== this->plt_call_stubs_
.end())
4738 template<int size
, bool big_endian
>
4739 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4740 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4741 const Sized_relobj_file
<size
, big_endian
>* object
,
4742 unsigned int locsym_index
) const
4744 Plt_stub_key
key(object
, locsym_index
);
4745 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4746 if (p
== this->plt_call_stubs_
.end())
4751 // Add a long branch stub if we don't already have one to given
4754 template<int size
, bool big_endian
>
4756 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4757 const Powerpc_relobj
<size
, big_endian
>* object
,
4758 unsigned int r_type
,
4763 Branch_stub_ent
ent(object
, to
, save_res
);
4764 Address off
= this->branch_size_
;
4765 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
4766 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
4770 this->need_save_res_
= true;
4773 unsigned int stub_size
= this->branch_stub_size(p
.first
);
4774 this->branch_size_
= off
+ stub_size
;
4775 if (size
== 64 && stub_size
!= 4)
4776 this->targ_
->add_branch_lookup_table(to
);
4779 return this->can_reach_stub(from
, off
, r_type
);
4782 // Find long branch stub offset.
4784 template<int size
, bool big_endian
>
4785 typename Stub_table
<size
, big_endian
>::Address
4786 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4787 const Powerpc_relobj
<size
, big_endian
>* object
,
4790 Branch_stub_ent
ent(object
, to
, false);
4791 typename
Branch_stub_entries::const_iterator p
4792 = this->long_branch_stubs_
.find(ent
);
4793 if (p
== this->long_branch_stubs_
.end())
4794 return invalid_address
;
4795 if (p
->first
.save_res_
)
4796 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4800 // Generate a suitable FDE to describe code in this stub group.
4801 // The __tls_get_addr_opt call stub needs to describe where it saves
4802 // LR, to support exceptions that might be thrown from __tls_get_addr.
4804 template<int size
, bool big_endian
>
4806 Stub_table
<size
, big_endian
>::init_plt_fde()
4808 unsigned char* p
= this->plt_fde_
;
4809 // offset pcrel sdata4, size udata4, and augmentation size byte.
4812 if (this->tls_get_addr_opt_bctrl_
!= -1u)
4814 unsigned int to_bctrl
= this->tls_get_addr_opt_bctrl_
/ 4;
4816 *p
++ = elfcpp::DW_CFA_advance_loc
+ to_bctrl
;
4817 else if (to_bctrl
< 256)
4819 *p
++ = elfcpp::DW_CFA_advance_loc1
;
4822 else if (to_bctrl
< 65536)
4824 *p
++ = elfcpp::DW_CFA_advance_loc2
;
4825 elfcpp::Swap
<16, big_endian
>::writeval(p
, to_bctrl
);
4830 *p
++ = elfcpp::DW_CFA_advance_loc4
;
4831 elfcpp::Swap
<32, big_endian
>::writeval(p
, to_bctrl
);
4834 *p
++ = elfcpp::DW_CFA_offset_extended_sf
;
4836 *p
++ = -(this->targ_
->stk_linker() / 8) & 0x7f;
4837 *p
++ = elfcpp::DW_CFA_advance_loc
+ 4;
4838 *p
++ = elfcpp::DW_CFA_restore_extended
;
4841 this->plt_fde_len_
= p
- this->plt_fde_
;
4844 // Add .eh_frame info for this stub section. Unlike other linker
4845 // generated .eh_frame this is added late in the link, because we
4846 // only want the .eh_frame info if this particular stub section is
4849 template<int size
, bool big_endian
>
4851 Stub_table
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4853 if (!parameters
->options().ld_generated_unwind_info())
4856 // Since we add stub .eh_frame info late, it must be placed
4857 // after all other linker generated .eh_frame info so that
4858 // merge mapping need not be updated for input sections.
4859 // There is no provision to use a different CIE to that used
4861 if (!this->targ_
->has_glink())
4864 if (this->plt_size_
+ this->branch_size_
+ this->need_save_res_
== 0)
4867 this->init_plt_fde();
4868 layout
->add_eh_frame_for_plt(this,
4869 Eh_cie
<size
>::eh_frame_cie
,
4870 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4871 this->plt_fde_
, this->plt_fde_len_
);
4874 template<int size
, bool big_endian
>
4876 Stub_table
<size
, big_endian
>::remove_eh_frame(Layout
* layout
)
4878 if (this->plt_fde_len_
!= 0)
4880 layout
->remove_eh_frame_for_plt(this,
4881 Eh_cie
<size
>::eh_frame_cie
,
4882 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4883 this->plt_fde_
, this->plt_fde_len_
);
4884 this->plt_fde_len_
= 0;
4888 // A class to handle .glink.
4890 template<int size
, bool big_endian
>
4891 class Output_data_glink
: public Output_section_data
4894 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4895 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4897 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4898 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4899 end_branch_table_(), ge_size_(0)
4903 add_eh_frame(Layout
* layout
);
4906 add_global_entry(const Symbol
*);
4909 find_global_entry(const Symbol
*) const;
4912 global_entry_align(unsigned int off
) const
4914 unsigned int align
= param_plt_align
<size
>();
4915 return (off
+ align
- 1) & -align
;
4919 global_entry_off() const
4921 return this->global_entry_align(this->end_branch_table_
);
4925 global_entry_address() const
4927 gold_assert(this->is_data_size_valid());
4928 return this->address() + this->global_entry_off();
4932 pltresolve_size() const
4936 + (this->targ_
->abiversion() < 2 ? 11 * 4 : 14 * 4));
4941 // Write to a map file.
4943 do_print_to_mapfile(Mapfile
* mapfile
) const
4944 { mapfile
->print_output_data(this, _("** glink")); }
4948 set_final_data_size();
4952 do_write(Output_file
*);
4954 // Allows access to .got and .plt for do_write.
4955 Target_powerpc
<size
, big_endian
>* targ_
;
4957 // Map sym to stub offset.
4958 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4959 Global_entry_stub_entries global_entry_stubs_
;
4961 unsigned int end_branch_table_
, ge_size_
;
4964 template<int size
, bool big_endian
>
4966 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4968 if (!parameters
->options().ld_generated_unwind_info())
4973 if (this->targ_
->abiversion() < 2)
4974 layout
->add_eh_frame_for_plt(this,
4975 Eh_cie
<64>::eh_frame_cie
,
4976 sizeof (Eh_cie
<64>::eh_frame_cie
),
4977 glink_eh_frame_fde_64v1
,
4978 sizeof (glink_eh_frame_fde_64v1
));
4980 layout
->add_eh_frame_for_plt(this,
4981 Eh_cie
<64>::eh_frame_cie
,
4982 sizeof (Eh_cie
<64>::eh_frame_cie
),
4983 glink_eh_frame_fde_64v2
,
4984 sizeof (glink_eh_frame_fde_64v2
));
4988 // 32-bit .glink can use the default since the CIE return
4989 // address reg, LR, is valid.
4990 layout
->add_eh_frame_for_plt(this,
4991 Eh_cie
<32>::eh_frame_cie
,
4992 sizeof (Eh_cie
<32>::eh_frame_cie
),
4994 sizeof (default_fde
));
4995 // Except where LR is used in a PIC __glink_PLTresolve.
4996 if (parameters
->options().output_is_position_independent())
4997 layout
->add_eh_frame_for_plt(this,
4998 Eh_cie
<32>::eh_frame_cie
,
4999 sizeof (Eh_cie
<32>::eh_frame_cie
),
5000 glink_eh_frame_fde_32
,
5001 sizeof (glink_eh_frame_fde_32
));
5005 template<int size
, bool big_endian
>
5007 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
5009 unsigned int off
= this->global_entry_align(this->ge_size_
);
5010 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
5011 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, off
));
5013 this->ge_size_
= off
+ 16;
5016 template<int size
, bool big_endian
>
5017 typename Output_data_glink
<size
, big_endian
>::Address
5018 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
5020 typename
Global_entry_stub_entries::const_iterator p
5021 = this->global_entry_stubs_
.find(gsym
);
5022 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
5025 template<int size
, bool big_endian
>
5027 Output_data_glink
<size
, big_endian
>::set_final_data_size()
5029 unsigned int count
= this->targ_
->plt_entry_count();
5030 section_size_type total
= 0;
5036 // space for branch table
5037 total
+= 4 * (count
- 1);
5039 total
+= -total
& 15;
5040 total
+= this->pltresolve_size();
5044 total
+= this->pltresolve_size();
5046 // space for branch table
5048 if (this->targ_
->abiversion() < 2)
5052 total
+= 4 * (count
- 0x8000);
5056 this->end_branch_table_
= total
;
5057 total
= this->global_entry_align(total
);
5058 total
+= this->ge_size_
;
5060 this->set_data_size(total
);
5063 // Define symbols on stubs, identifying the stub.
5065 template<int size
, bool big_endian
>
5067 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
5069 if (!this->plt_call_stubs_
.empty())
5071 // The key for the plt call stub hash table includes addresses,
5072 // therefore traversal order depends on those addresses, which
5073 // can change between runs if gold is a PIE. Unfortunately the
5074 // output .symtab ordering depends on the order in which symbols
5075 // are added to the linker symtab. We want reproducible output
5076 // so must sort the call stub symbols.
5077 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
5078 std::vector
<plt_iter
> sorted
;
5079 sorted
.resize(this->plt_call_stubs_
.size());
5081 for (plt_iter cs
= this->plt_call_stubs_
.begin();
5082 cs
!= this->plt_call_stubs_
.end();
5084 sorted
[cs
->second
.indx_
] = cs
;
5086 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
5088 plt_iter cs
= sorted
[i
];
5091 if (cs
->first
.addend_
!= 0)
5092 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
5095 if (cs
->first
.object_
)
5097 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5098 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5099 sprintf(obj
, "%x:", ppcobj
->uniq());
5102 const char *symname
;
5103 if (cs
->first
.sym_
== NULL
)
5105 sprintf(localname
, "%x", cs
->first
.locsym_
);
5106 symname
= localname
;
5108 else if (this->targ_
->is_tls_get_addr_opt(cs
->first
.sym_
))
5109 symname
= this->targ_
->tls_get_addr_opt()->name();
5111 symname
= cs
->first
.sym_
->name();
5112 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
5113 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
5115 = this->stub_address() - this->address() + cs
->second
.off_
;
5116 unsigned int stub_size
= this->plt_call_align(this->plt_call_size(cs
));
5117 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5121 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
5122 for (branch_iter bs
= this->long_branch_stubs_
.begin();
5123 bs
!= this->long_branch_stubs_
.end();
5126 if (bs
->first
.save_res_
)
5129 char* name
= new char[8 + 13 + 16 + 1];
5130 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
5131 static_cast<unsigned long long>(bs
->first
.dest_
));
5132 Address value
= (this->stub_address() - this->address()
5133 + this->plt_size_
+ bs
->second
);
5134 unsigned int stub_size
= this->branch_stub_size(bs
);
5135 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5139 // Write out plt and long branch stub code.
5141 template<int size
, bool big_endian
>
5143 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
5145 if (this->plt_call_stubs_
.empty()
5146 && this->long_branch_stubs_
.empty())
5149 const section_size_type start_off
= this->offset();
5150 const section_size_type off
= this->stub_offset();
5151 const section_size_type oview_size
=
5152 convert_to_section_size_type(this->data_size() - (off
- start_off
));
5153 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5158 const Output_data_got_powerpc
<size
, big_endian
>* got
5159 = this->targ_
->got_section();
5160 Address got_os_addr
= got
->output_section()->address();
5162 if (!this->plt_call_stubs_
.empty())
5164 // The base address of the .plt section.
5165 Address plt_base
= this->targ_
->plt_section()->address();
5166 Address iplt_base
= invalid_address
;
5168 // Write out plt call stubs.
5169 typename
Plt_stub_entries::const_iterator cs
;
5170 for (cs
= this->plt_call_stubs_
.begin();
5171 cs
!= this->plt_call_stubs_
.end();
5175 Address pltoff
= this->plt_off(cs
, &is_iplt
);
5176 Address plt_addr
= pltoff
;
5179 if (iplt_base
== invalid_address
)
5180 iplt_base
= this->targ_
->iplt_section()->address();
5181 plt_addr
+= iplt_base
;
5184 plt_addr
+= plt_base
;
5185 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5186 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5187 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
5188 Address off
= plt_addr
- got_addr
;
5190 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
5191 gold_error(_("%s: linkage table error against `%s'"),
5192 cs
->first
.object_
->name().c_str(),
5193 cs
->first
.sym_
->demangled_name().c_str());
5195 bool plt_load_toc
= this->targ_
->abiversion() < 2;
5197 = plt_load_toc
&& parameters
->options().plt_static_chain();
5199 = plt_load_toc
&& this->targ_
->plt_thread_safe();
5200 bool use_fake_dep
= false;
5201 Address cmp_branch_off
= 0;
5204 unsigned int pltindex
5205 = ((pltoff
- this->targ_
->first_plt_entry_offset())
5206 / this->targ_
->plt_entry_size());
5208 = (this->targ_
->glink_section()->pltresolve_size()
5210 if (pltindex
> 32768)
5211 glinkoff
+= (pltindex
- 32768) * 4;
5213 = this->targ_
->glink_section()->address() + glinkoff
;
5215 = (this->stub_address() + cs
->second
.off_
+ 20
5216 + 4 * cs
->second
.r2save_
5217 + 4 * (ha(off
) != 0)
5218 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5219 + 4 * static_chain
);
5220 cmp_branch_off
= to
- from
;
5221 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
5224 p
= oview
+ cs
->second
.off_
;
5225 const Symbol
* gsym
= cs
->first
.sym_
;
5226 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5228 write_insn
<big_endian
>(p
, ld_11_3
+ 0);
5230 write_insn
<big_endian
>(p
, ld_12_3
+ 8);
5232 write_insn
<big_endian
>(p
, mr_0_3
);
5234 write_insn
<big_endian
>(p
, cmpdi_11_0
);
5236 write_insn
<big_endian
>(p
, add_3_12_13
);
5238 write_insn
<big_endian
>(p
, beqlr
);
5240 write_insn
<big_endian
>(p
, mr_3_0
);
5242 if (!cs
->second
.localentry0_
)
5244 write_insn
<big_endian
>(p
, mflr_11
);
5246 write_insn
<big_endian
>(p
, (std_11_1
5247 + this->targ_
->stk_linker()));
5250 use_fake_dep
= thread_safe
;
5254 if (cs
->second
.r2save_
)
5256 write_insn
<big_endian
>(p
,
5257 std_2_1
+ this->targ_
->stk_toc());
5262 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
5264 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
5269 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
5271 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
5275 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5277 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
5281 write_insn
<big_endian
>(p
, mtctr_12
);
5287 write_insn
<big_endian
>(p
, xor_2_12_12
);
5289 write_insn
<big_endian
>(p
, add_11_11_2
);
5292 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5296 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5303 if (cs
->second
.r2save_
)
5305 write_insn
<big_endian
>(p
,
5306 std_2_1
+ this->targ_
->stk_toc());
5309 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5312 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5314 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5318 write_insn
<big_endian
>(p
, mtctr_12
);
5324 write_insn
<big_endian
>(p
, xor_11_12_12
);
5326 write_insn
<big_endian
>(p
, add_2_2_11
);
5331 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5334 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5338 if (!cs
->second
.localentry0_
5339 && this->targ_
->is_tls_get_addr_opt(gsym
))
5341 write_insn
<big_endian
>(p
, bctrl
);
5343 write_insn
<big_endian
>(p
, ld_2_1
+ this->targ_
->stk_toc());
5345 write_insn
<big_endian
>(p
, ld_11_1
+ this->targ_
->stk_linker());
5347 write_insn
<big_endian
>(p
, mtlr_11
);
5349 write_insn
<big_endian
>(p
, blr
);
5351 else if (thread_safe
&& !use_fake_dep
)
5353 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5355 write_insn
<big_endian
>(p
, bnectr_p4
);
5357 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5360 write_insn
<big_endian
>(p
, bctr
);
5364 // Write out long branch stubs.
5365 typename
Branch_stub_entries::const_iterator bs
;
5366 for (bs
= this->long_branch_stubs_
.begin();
5367 bs
!= this->long_branch_stubs_
.end();
5370 if (bs
->first
.save_res_
)
5372 p
= oview
+ this->plt_size_
+ bs
->second
;
5373 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5374 Address delta
= bs
->first
.dest_
- loc
;
5375 if (delta
+ (1 << 25) < 2 << 25)
5376 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5380 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5381 gold_assert(brlt_addr
!= invalid_address
);
5382 brlt_addr
+= this->targ_
->brlt_section()->address();
5383 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5384 Address brltoff
= brlt_addr
- got_addr
;
5385 if (ha(brltoff
) == 0)
5387 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5391 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5392 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5394 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5395 write_insn
<big_endian
>(p
, bctr
);
5401 if (!this->plt_call_stubs_
.empty())
5403 // The base address of the .plt section.
5404 Address plt_base
= this->targ_
->plt_section()->address();
5405 Address iplt_base
= invalid_address
;
5406 // The address of _GLOBAL_OFFSET_TABLE_.
5407 Address g_o_t
= invalid_address
;
5409 // Write out plt call stubs.
5410 typename
Plt_stub_entries::const_iterator cs
;
5411 for (cs
= this->plt_call_stubs_
.begin();
5412 cs
!= this->plt_call_stubs_
.end();
5416 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
5419 if (iplt_base
== invalid_address
)
5420 iplt_base
= this->targ_
->iplt_section()->address();
5421 plt_addr
+= iplt_base
;
5424 plt_addr
+= plt_base
;
5426 p
= oview
+ cs
->second
.off_
;
5427 const Symbol
* gsym
= cs
->first
.sym_
;
5428 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5430 write_insn
<big_endian
>(p
, lwz_11_3
+ 0);
5432 write_insn
<big_endian
>(p
, lwz_12_3
+ 4);
5434 write_insn
<big_endian
>(p
, mr_0_3
);
5436 write_insn
<big_endian
>(p
, cmpwi_11_0
);
5438 write_insn
<big_endian
>(p
, add_3_12_2
);
5440 write_insn
<big_endian
>(p
, beqlr
);
5442 write_insn
<big_endian
>(p
, mr_3_0
);
5444 write_insn
<big_endian
>(p
, nop
);
5447 if (parameters
->options().output_is_position_independent())
5450 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5451 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5452 (cs
->first
.object_
));
5453 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5455 unsigned int got2
= ppcobj
->got2_shndx();
5456 got_addr
= ppcobj
->get_output_section_offset(got2
);
5457 gold_assert(got_addr
!= invalid_address
);
5458 got_addr
+= (ppcobj
->output_section(got2
)->address()
5459 + cs
->first
.addend_
);
5463 if (g_o_t
== invalid_address
)
5465 const Output_data_got_powerpc
<size
, big_endian
>* got
5466 = this->targ_
->got_section();
5467 g_o_t
= got
->address() + got
->g_o_t();
5472 Address off
= plt_addr
- got_addr
;
5474 write_insn
<big_endian
>(p
, lwz_11_30
+ l(off
));
5477 write_insn
<big_endian
>(p
, addis_11_30
+ ha(off
));
5479 write_insn
<big_endian
>(p
, lwz_11_11
+ l(off
));
5484 write_insn
<big_endian
>(p
, lis_11
+ ha(plt_addr
));
5486 write_insn
<big_endian
>(p
, lwz_11_11
+ l(plt_addr
));
5489 write_insn
<big_endian
>(p
, mtctr_11
);
5491 write_insn
<big_endian
>(p
, bctr
);
5495 // Write out long branch stubs.
5496 typename
Branch_stub_entries::const_iterator bs
;
5497 for (bs
= this->long_branch_stubs_
.begin();
5498 bs
!= this->long_branch_stubs_
.end();
5501 if (bs
->first
.save_res_
)
5503 p
= oview
+ this->plt_size_
+ bs
->second
;
5504 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5505 Address delta
= bs
->first
.dest_
- loc
;
5506 if (delta
+ (1 << 25) < 2 << 25)
5507 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5508 else if (!parameters
->options().output_is_position_independent())
5510 write_insn
<big_endian
>(p
, lis_12
+ ha(bs
->first
.dest_
));
5512 write_insn
<big_endian
>(p
, addi_12_12
+ l(bs
->first
.dest_
));
5517 write_insn
<big_endian
>(p
, mflr_0
);
5519 write_insn
<big_endian
>(p
, bcl_20_31
);
5521 write_insn
<big_endian
>(p
, mflr_12
);
5523 write_insn
<big_endian
>(p
, addis_12_12
+ ha(delta
));
5525 write_insn
<big_endian
>(p
, addi_12_12
+ l(delta
));
5527 write_insn
<big_endian
>(p
, mtlr_0
);
5530 write_insn
<big_endian
>(p
, mtctr_12
);
5532 write_insn
<big_endian
>(p
, bctr
);
5535 if (this->need_save_res_
)
5537 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5538 memcpy (p
, this->targ_
->savres_section()->contents(),
5539 this->targ_
->savres_section()->data_size());
5543 // Write out .glink.
5545 template<int size
, bool big_endian
>
5547 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5549 const section_size_type off
= this->offset();
5550 const section_size_type oview_size
=
5551 convert_to_section_size_type(this->data_size());
5552 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5555 // The base address of the .plt section.
5556 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5557 Address plt_base
= this->targ_
->plt_section()->address();
5561 if (this->end_branch_table_
!= 0)
5563 // Write pltresolve stub.
5565 Address after_bcl
= this->address() + 16;
5566 Address pltoff
= plt_base
- after_bcl
;
5568 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5570 if (this->targ_
->abiversion() < 2)
5572 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5573 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5574 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5575 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5576 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5577 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5578 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5579 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5580 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5581 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5585 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5586 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5587 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5588 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5589 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5590 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5591 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5592 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5593 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5594 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5595 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5596 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5597 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5599 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5600 gold_assert(p
== oview
+ this->pltresolve_size());
5602 // Write lazy link call stubs.
5604 while (p
< oview
+ this->end_branch_table_
)
5606 if (this->targ_
->abiversion() < 2)
5610 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5614 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5615 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5618 uint32_t branch_off
= 8 - (p
- oview
);
5619 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5624 Address plt_base
= this->targ_
->plt_section()->address();
5625 Address iplt_base
= invalid_address
;
5626 unsigned int global_entry_off
= this->global_entry_off();
5627 Address global_entry_base
= this->address() + global_entry_off
;
5628 typename
Global_entry_stub_entries::const_iterator ge
;
5629 for (ge
= this->global_entry_stubs_
.begin();
5630 ge
!= this->global_entry_stubs_
.end();
5633 p
= oview
+ global_entry_off
+ ge
->second
;
5634 Address plt_addr
= ge
->first
->plt_offset();
5635 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5636 && ge
->first
->can_use_relative_reloc(false))
5638 if (iplt_base
== invalid_address
)
5639 iplt_base
= this->targ_
->iplt_section()->address();
5640 plt_addr
+= iplt_base
;
5643 plt_addr
+= plt_base
;
5644 Address my_addr
= global_entry_base
+ ge
->second
;
5645 Address off
= plt_addr
- my_addr
;
5647 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5648 gold_error(_("%s: linkage table error against `%s'"),
5649 ge
->first
->object()->name().c_str(),
5650 ge
->first
->demangled_name().c_str());
5652 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5653 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5654 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5655 write_insn
<big_endian
>(p
, bctr
);
5660 const Output_data_got_powerpc
<size
, big_endian
>* got
5661 = this->targ_
->got_section();
5662 // The address of _GLOBAL_OFFSET_TABLE_.
5663 Address g_o_t
= got
->address() + got
->g_o_t();
5665 // Write out pltresolve branch table.
5667 unsigned int the_end
= oview_size
- this->pltresolve_size();
5668 unsigned char* end_p
= oview
+ the_end
;
5669 while (p
< end_p
- 8 * 4)
5670 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5672 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5674 // Write out pltresolve call stub.
5675 end_p
= oview
+ oview_size
;
5676 if (parameters
->options().output_is_position_independent())
5678 Address res0_off
= 0;
5679 Address after_bcl_off
= the_end
+ 12;
5680 Address bcl_res0
= after_bcl_off
- res0_off
;
5682 write_insn
<big_endian
>(p
, addis_11_11
+ ha(bcl_res0
));
5684 write_insn
<big_endian
>(p
, mflr_0
);
5686 write_insn
<big_endian
>(p
, bcl_20_31
);
5688 write_insn
<big_endian
>(p
, addi_11_11
+ l(bcl_res0
));
5690 write_insn
<big_endian
>(p
, mflr_12
);
5692 write_insn
<big_endian
>(p
, mtlr_0
);
5694 write_insn
<big_endian
>(p
, sub_11_11_12
);
5697 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5699 write_insn
<big_endian
>(p
, addis_12_12
+ ha(got_bcl
));
5701 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5703 write_insn
<big_endian
>(p
, lwz_0_12
+ l(got_bcl
));
5705 write_insn
<big_endian
>(p
, lwz_12_12
+ l(got_bcl
+ 4));
5709 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(got_bcl
));
5711 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5714 write_insn
<big_endian
>(p
, mtctr_0
);
5716 write_insn
<big_endian
>(p
, add_0_11_11
);
5718 write_insn
<big_endian
>(p
, add_11_0_11
);
5722 Address res0
= this->address();
5724 write_insn
<big_endian
>(p
, lis_12
+ ha(g_o_t
+ 4));
5726 write_insn
<big_endian
>(p
, addis_11_11
+ ha(-res0
));
5728 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5729 write_insn
<big_endian
>(p
, lwz_0_12
+ l(g_o_t
+ 4));
5731 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(g_o_t
+ 4));
5733 write_insn
<big_endian
>(p
, addi_11_11
+ l(-res0
));
5735 write_insn
<big_endian
>(p
, mtctr_0
);
5737 write_insn
<big_endian
>(p
, add_0_11_11
);
5739 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5740 write_insn
<big_endian
>(p
, lwz_12_12
+ l(g_o_t
+ 8));
5742 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5744 write_insn
<big_endian
>(p
, add_11_0_11
);
5747 write_insn
<big_endian
>(p
, bctr
);
5751 write_insn
<big_endian
>(p
, nop
);
5756 of
->write_output_view(off
, oview_size
, oview
);
5760 // A class to handle linker generated save/restore functions.
5762 template<int size
, bool big_endian
>
5763 class Output_data_save_res
: public Output_section_data_build
5766 Output_data_save_res(Symbol_table
* symtab
);
5768 const unsigned char*
5775 // Write to a map file.
5777 do_print_to_mapfile(Mapfile
* mapfile
) const
5778 { mapfile
->print_output_data(this, _("** save/restore")); }
5781 do_write(Output_file
*);
5784 // The maximum size of save/restore contents.
5785 static const unsigned int savres_max
= 218*4;
5788 savres_define(Symbol_table
* symtab
,
5790 unsigned int lo
, unsigned int hi
,
5791 unsigned char* write_ent(unsigned char*, int),
5792 unsigned char* write_tail(unsigned char*, int));
5794 unsigned char *contents_
;
5797 template<bool big_endian
>
5798 static unsigned char*
5799 savegpr0(unsigned char* p
, int r
)
5801 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5802 write_insn
<big_endian
>(p
, insn
);
5806 template<bool big_endian
>
5807 static unsigned char*
5808 savegpr0_tail(unsigned char* p
, int r
)
5810 p
= savegpr0
<big_endian
>(p
, r
);
5811 uint32_t insn
= std_0_1
+ 16;
5812 write_insn
<big_endian
>(p
, insn
);
5814 write_insn
<big_endian
>(p
, blr
);
5818 template<bool big_endian
>
5819 static unsigned char*
5820 restgpr0(unsigned char* p
, int r
)
5822 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5823 write_insn
<big_endian
>(p
, insn
);
5827 template<bool big_endian
>
5828 static unsigned char*
5829 restgpr0_tail(unsigned char* p
, int r
)
5831 uint32_t insn
= ld_0_1
+ 16;
5832 write_insn
<big_endian
>(p
, insn
);
5834 p
= restgpr0
<big_endian
>(p
, r
);
5835 write_insn
<big_endian
>(p
, mtlr_0
);
5839 p
= restgpr0
<big_endian
>(p
, 30);
5840 p
= restgpr0
<big_endian
>(p
, 31);
5842 write_insn
<big_endian
>(p
, blr
);
5846 template<bool big_endian
>
5847 static unsigned char*
5848 savegpr1(unsigned char* p
, int r
)
5850 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5851 write_insn
<big_endian
>(p
, insn
);
5855 template<bool big_endian
>
5856 static unsigned char*
5857 savegpr1_tail(unsigned char* p
, int r
)
5859 p
= savegpr1
<big_endian
>(p
, r
);
5860 write_insn
<big_endian
>(p
, blr
);
5864 template<bool big_endian
>
5865 static unsigned char*
5866 restgpr1(unsigned char* p
, int r
)
5868 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5869 write_insn
<big_endian
>(p
, insn
);
5873 template<bool big_endian
>
5874 static unsigned char*
5875 restgpr1_tail(unsigned char* p
, int r
)
5877 p
= restgpr1
<big_endian
>(p
, r
);
5878 write_insn
<big_endian
>(p
, blr
);
5882 template<bool big_endian
>
5883 static unsigned char*
5884 savefpr(unsigned char* p
, int r
)
5886 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5887 write_insn
<big_endian
>(p
, insn
);
5891 template<bool big_endian
>
5892 static unsigned char*
5893 savefpr0_tail(unsigned char* p
, int r
)
5895 p
= savefpr
<big_endian
>(p
, r
);
5896 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5898 write_insn
<big_endian
>(p
, blr
);
5902 template<bool big_endian
>
5903 static unsigned char*
5904 restfpr(unsigned char* p
, int r
)
5906 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5907 write_insn
<big_endian
>(p
, insn
);
5911 template<bool big_endian
>
5912 static unsigned char*
5913 restfpr0_tail(unsigned char* p
, int r
)
5915 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5917 p
= restfpr
<big_endian
>(p
, r
);
5918 write_insn
<big_endian
>(p
, mtlr_0
);
5922 p
= restfpr
<big_endian
>(p
, 30);
5923 p
= restfpr
<big_endian
>(p
, 31);
5925 write_insn
<big_endian
>(p
, blr
);
5929 template<bool big_endian
>
5930 static unsigned char*
5931 savefpr1_tail(unsigned char* p
, int r
)
5933 p
= savefpr
<big_endian
>(p
, r
);
5934 write_insn
<big_endian
>(p
, blr
);
5938 template<bool big_endian
>
5939 static unsigned char*
5940 restfpr1_tail(unsigned char* p
, int r
)
5942 p
= restfpr
<big_endian
>(p
, r
);
5943 write_insn
<big_endian
>(p
, blr
);
5947 template<bool big_endian
>
5948 static unsigned char*
5949 savevr(unsigned char* p
, int r
)
5951 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5952 write_insn
<big_endian
>(p
, insn
);
5954 insn
= stvx_0_12_0
+ (r
<< 21);
5955 write_insn
<big_endian
>(p
, insn
);
5959 template<bool big_endian
>
5960 static unsigned char*
5961 savevr_tail(unsigned char* p
, int r
)
5963 p
= savevr
<big_endian
>(p
, r
);
5964 write_insn
<big_endian
>(p
, blr
);
5968 template<bool big_endian
>
5969 static unsigned char*
5970 restvr(unsigned char* p
, int r
)
5972 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5973 write_insn
<big_endian
>(p
, insn
);
5975 insn
= lvx_0_12_0
+ (r
<< 21);
5976 write_insn
<big_endian
>(p
, insn
);
5980 template<bool big_endian
>
5981 static unsigned char*
5982 restvr_tail(unsigned char* p
, int r
)
5984 p
= restvr
<big_endian
>(p
, r
);
5985 write_insn
<big_endian
>(p
, blr
);
5990 template<int size
, bool big_endian
>
5991 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5992 Symbol_table
* symtab
)
5993 : Output_section_data_build(4),
5996 this->savres_define(symtab
,
5997 "_savegpr0_", 14, 31,
5998 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5999 this->savres_define(symtab
,
6000 "_restgpr0_", 14, 29,
6001 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6002 this->savres_define(symtab
,
6003 "_restgpr0_", 30, 31,
6004 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6005 this->savres_define(symtab
,
6006 "_savegpr1_", 14, 31,
6007 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
6008 this->savres_define(symtab
,
6009 "_restgpr1_", 14, 31,
6010 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
6011 this->savres_define(symtab
,
6012 "_savefpr_", 14, 31,
6013 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
6014 this->savres_define(symtab
,
6015 "_restfpr_", 14, 29,
6016 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6017 this->savres_define(symtab
,
6018 "_restfpr_", 30, 31,
6019 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6020 this->savres_define(symtab
,
6022 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
6023 this->savres_define(symtab
,
6025 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
6026 this->savres_define(symtab
,
6028 savevr
<big_endian
>, savevr_tail
<big_endian
>);
6029 this->savres_define(symtab
,
6031 restvr
<big_endian
>, restvr_tail
<big_endian
>);
6034 template<int size
, bool big_endian
>
6036 Output_data_save_res
<size
, big_endian
>::savres_define(
6037 Symbol_table
* symtab
,
6039 unsigned int lo
, unsigned int hi
,
6040 unsigned char* write_ent(unsigned char*, int),
6041 unsigned char* write_tail(unsigned char*, int))
6043 size_t len
= strlen(name
);
6044 bool writing
= false;
6047 memcpy(sym
, name
, len
);
6050 for (unsigned int i
= lo
; i
<= hi
; i
++)
6052 sym
[len
+ 0] = i
/ 10 + '0';
6053 sym
[len
+ 1] = i
% 10 + '0';
6054 Symbol
* gsym
= symtab
->lookup(sym
);
6055 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
6056 writing
= writing
|| refd
;
6059 if (this->contents_
== NULL
)
6060 this->contents_
= new unsigned char[this->savres_max
];
6062 section_size_type value
= this->current_data_size();
6063 unsigned char* p
= this->contents_
+ value
;
6065 p
= write_ent(p
, i
);
6067 p
= write_tail(p
, i
);
6068 section_size_type cur_size
= p
- this->contents_
;
6069 this->set_current_data_size(cur_size
);
6071 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
6072 this, value
, cur_size
- value
,
6073 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
6074 elfcpp::STV_HIDDEN
, 0, false, false);
6079 // Write out save/restore.
6081 template<int size
, bool big_endian
>
6083 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
6085 const section_size_type off
= this->offset();
6086 const section_size_type oview_size
=
6087 convert_to_section_size_type(this->data_size());
6088 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
6089 memcpy(oview
, this->contents_
, oview_size
);
6090 of
->write_output_view(off
, oview_size
, oview
);
6094 // Create the glink section.
6096 template<int size
, bool big_endian
>
6098 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
6100 if (this->glink_
== NULL
)
6102 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
6103 this->glink_
->add_eh_frame(layout
);
6104 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6105 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6106 this->glink_
, ORDER_TEXT
, false);
6110 // Create a PLT entry for a global symbol.
6112 template<int size
, bool big_endian
>
6114 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
6118 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
6119 && gsym
->can_use_relative_reloc(false))
6121 if (this->iplt_
== NULL
)
6122 this->make_iplt_section(symtab
, layout
);
6123 this->iplt_
->add_ifunc_entry(gsym
);
6127 if (this->plt_
== NULL
)
6128 this->make_plt_section(symtab
, layout
);
6129 this->plt_
->add_entry(gsym
);
6133 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
6135 template<int size
, bool big_endian
>
6137 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
6138 Symbol_table
* symtab
,
6140 Sized_relobj_file
<size
, big_endian
>* relobj
,
6143 if (this->iplt_
== NULL
)
6144 this->make_iplt_section(symtab
, layout
);
6145 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
6148 // Return the number of entries in the PLT.
6150 template<int size
, bool big_endian
>
6152 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
6154 if (this->plt_
== NULL
)
6156 return this->plt_
->entry_count();
6159 // Create a GOT entry for local dynamic __tls_get_addr calls.
6161 template<int size
, bool big_endian
>
6163 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
6164 Symbol_table
* symtab
,
6166 Sized_relobj_file
<size
, big_endian
>* object
)
6168 if (this->tlsld_got_offset_
== -1U)
6170 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
6171 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
6172 Output_data_got_powerpc
<size
, big_endian
>* got
6173 = this->got_section(symtab
, layout
);
6174 unsigned int got_offset
= got
->add_constant_pair(0, 0);
6175 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
6177 this->tlsld_got_offset_
= got_offset
;
6179 return this->tlsld_got_offset_
;
6182 // Get the Reference_flags for a particular relocation.
6184 template<int size
, bool big_endian
>
6186 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
6187 unsigned int r_type
,
6188 const Target_powerpc
* target
)
6194 case elfcpp::R_POWERPC_NONE
:
6195 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6196 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6197 case elfcpp::R_PPC64_TOC
:
6198 // No symbol reference.
6201 case elfcpp::R_PPC64_ADDR64
:
6202 case elfcpp::R_PPC64_UADDR64
:
6203 case elfcpp::R_POWERPC_ADDR32
:
6204 case elfcpp::R_POWERPC_UADDR32
:
6205 case elfcpp::R_POWERPC_ADDR16
:
6206 case elfcpp::R_POWERPC_UADDR16
:
6207 case elfcpp::R_POWERPC_ADDR16_LO
:
6208 case elfcpp::R_POWERPC_ADDR16_HI
:
6209 case elfcpp::R_POWERPC_ADDR16_HA
:
6210 ref
= Symbol::ABSOLUTE_REF
;
6213 case elfcpp::R_POWERPC_ADDR24
:
6214 case elfcpp::R_POWERPC_ADDR14
:
6215 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6216 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6217 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
6220 case elfcpp::R_PPC64_REL64
:
6221 case elfcpp::R_POWERPC_REL32
:
6222 case elfcpp::R_PPC_LOCAL24PC
:
6223 case elfcpp::R_POWERPC_REL16
:
6224 case elfcpp::R_POWERPC_REL16_LO
:
6225 case elfcpp::R_POWERPC_REL16_HI
:
6226 case elfcpp::R_POWERPC_REL16_HA
:
6227 ref
= Symbol::RELATIVE_REF
;
6230 case elfcpp::R_POWERPC_REL24
:
6231 case elfcpp::R_PPC_PLTREL24
:
6232 case elfcpp::R_POWERPC_REL14
:
6233 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6234 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6235 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
6238 case elfcpp::R_POWERPC_GOT16
:
6239 case elfcpp::R_POWERPC_GOT16_LO
:
6240 case elfcpp::R_POWERPC_GOT16_HI
:
6241 case elfcpp::R_POWERPC_GOT16_HA
:
6242 case elfcpp::R_PPC64_GOT16_DS
:
6243 case elfcpp::R_PPC64_GOT16_LO_DS
:
6244 case elfcpp::R_PPC64_TOC16
:
6245 case elfcpp::R_PPC64_TOC16_LO
:
6246 case elfcpp::R_PPC64_TOC16_HI
:
6247 case elfcpp::R_PPC64_TOC16_HA
:
6248 case elfcpp::R_PPC64_TOC16_DS
:
6249 case elfcpp::R_PPC64_TOC16_LO_DS
:
6250 ref
= Symbol::RELATIVE_REF
;
6253 case elfcpp::R_POWERPC_GOT_TPREL16
:
6254 case elfcpp::R_POWERPC_TLS
:
6255 ref
= Symbol::TLS_REF
;
6258 case elfcpp::R_POWERPC_COPY
:
6259 case elfcpp::R_POWERPC_GLOB_DAT
:
6260 case elfcpp::R_POWERPC_JMP_SLOT
:
6261 case elfcpp::R_POWERPC_RELATIVE
:
6262 case elfcpp::R_POWERPC_DTPMOD
:
6264 // Not expected. We will give an error later.
6268 if (size
== 64 && target
->abiversion() < 2)
6269 ref
|= Symbol::FUNC_DESC_ABI
;
6273 // Report an unsupported relocation against a local symbol.
6275 template<int size
, bool big_endian
>
6277 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
6278 Sized_relobj_file
<size
, big_endian
>* object
,
6279 unsigned int r_type
)
6281 gold_error(_("%s: unsupported reloc %u against local symbol"),
6282 object
->name().c_str(), r_type
);
6285 // We are about to emit a dynamic relocation of type R_TYPE. If the
6286 // dynamic linker does not support it, issue an error.
6288 template<int size
, bool big_endian
>
6290 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
6291 unsigned int r_type
)
6293 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
6295 // These are the relocation types supported by glibc for both 32-bit
6296 // and 64-bit powerpc.
6299 case elfcpp::R_POWERPC_NONE
:
6300 case elfcpp::R_POWERPC_RELATIVE
:
6301 case elfcpp::R_POWERPC_GLOB_DAT
:
6302 case elfcpp::R_POWERPC_DTPMOD
:
6303 case elfcpp::R_POWERPC_DTPREL
:
6304 case elfcpp::R_POWERPC_TPREL
:
6305 case elfcpp::R_POWERPC_JMP_SLOT
:
6306 case elfcpp::R_POWERPC_COPY
:
6307 case elfcpp::R_POWERPC_IRELATIVE
:
6308 case elfcpp::R_POWERPC_ADDR32
:
6309 case elfcpp::R_POWERPC_UADDR32
:
6310 case elfcpp::R_POWERPC_ADDR24
:
6311 case elfcpp::R_POWERPC_ADDR16
:
6312 case elfcpp::R_POWERPC_UADDR16
:
6313 case elfcpp::R_POWERPC_ADDR16_LO
:
6314 case elfcpp::R_POWERPC_ADDR16_HI
:
6315 case elfcpp::R_POWERPC_ADDR16_HA
:
6316 case elfcpp::R_POWERPC_ADDR14
:
6317 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6318 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6319 case elfcpp::R_POWERPC_REL32
:
6320 case elfcpp::R_POWERPC_REL24
:
6321 case elfcpp::R_POWERPC_TPREL16
:
6322 case elfcpp::R_POWERPC_TPREL16_LO
:
6323 case elfcpp::R_POWERPC_TPREL16_HI
:
6324 case elfcpp::R_POWERPC_TPREL16_HA
:
6335 // These are the relocation types supported only on 64-bit.
6336 case elfcpp::R_PPC64_ADDR64
:
6337 case elfcpp::R_PPC64_UADDR64
:
6338 case elfcpp::R_PPC64_JMP_IREL
:
6339 case elfcpp::R_PPC64_ADDR16_DS
:
6340 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6341 case elfcpp::R_PPC64_ADDR16_HIGH
:
6342 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6343 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6344 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6345 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6346 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6347 case elfcpp::R_PPC64_REL64
:
6348 case elfcpp::R_POWERPC_ADDR30
:
6349 case elfcpp::R_PPC64_TPREL16_DS
:
6350 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6351 case elfcpp::R_PPC64_TPREL16_HIGH
:
6352 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6353 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6354 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6355 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6356 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6367 // These are the relocation types supported only on 32-bit.
6368 // ??? glibc ld.so doesn't need to support these.
6369 case elfcpp::R_POWERPC_DTPREL16
:
6370 case elfcpp::R_POWERPC_DTPREL16_LO
:
6371 case elfcpp::R_POWERPC_DTPREL16_HI
:
6372 case elfcpp::R_POWERPC_DTPREL16_HA
:
6380 // This prevents us from issuing more than one error per reloc
6381 // section. But we can still wind up issuing more than one
6382 // error per object file.
6383 if (this->issued_non_pic_error_
)
6385 gold_assert(parameters
->options().output_is_position_independent());
6386 object
->error(_("requires unsupported dynamic reloc; "
6387 "recompile with -fPIC"));
6388 this->issued_non_pic_error_
= true;
6392 // Return whether we need to make a PLT entry for a relocation of the
6393 // given type against a STT_GNU_IFUNC symbol.
6395 template<int size
, bool big_endian
>
6397 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6398 Target_powerpc
<size
, big_endian
>* target
,
6399 Sized_relobj_file
<size
, big_endian
>* object
,
6400 unsigned int r_type
,
6403 // In non-pic code any reference will resolve to the plt call stub
6404 // for the ifunc symbol.
6405 if ((size
== 32 || target
->abiversion() >= 2)
6406 && !parameters
->options().output_is_position_independent())
6411 // Word size refs from data sections are OK, but don't need a PLT entry.
6412 case elfcpp::R_POWERPC_ADDR32
:
6413 case elfcpp::R_POWERPC_UADDR32
:
6418 case elfcpp::R_PPC64_ADDR64
:
6419 case elfcpp::R_PPC64_UADDR64
:
6424 // GOT refs are good, but also don't need a PLT entry.
6425 case elfcpp::R_POWERPC_GOT16
:
6426 case elfcpp::R_POWERPC_GOT16_LO
:
6427 case elfcpp::R_POWERPC_GOT16_HI
:
6428 case elfcpp::R_POWERPC_GOT16_HA
:
6429 case elfcpp::R_PPC64_GOT16_DS
:
6430 case elfcpp::R_PPC64_GOT16_LO_DS
:
6433 // Function calls are good, and these do need a PLT entry.
6434 case elfcpp::R_POWERPC_ADDR24
:
6435 case elfcpp::R_POWERPC_ADDR14
:
6436 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6437 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6438 case elfcpp::R_POWERPC_REL24
:
6439 case elfcpp::R_PPC_PLTREL24
:
6440 case elfcpp::R_POWERPC_REL14
:
6441 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6442 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6449 // Anything else is a problem.
6450 // If we are building a static executable, the libc startup function
6451 // responsible for applying indirect function relocations is going
6452 // to complain about the reloc type.
6453 // If we are building a dynamic executable, we will have a text
6454 // relocation. The dynamic loader will set the text segment
6455 // writable and non-executable to apply text relocations. So we'll
6456 // segfault when trying to run the indirection function to resolve
6459 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6460 object
->name().c_str(), r_type
);
6464 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6468 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6470 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6471 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6472 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6473 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6474 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6475 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6476 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6477 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6478 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6479 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6480 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6481 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6482 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6483 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6484 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6485 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6486 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6487 /* Exclude lfqu by testing reloc. If relocs are ever
6488 defined for the reduced D field in psq_lu then those
6489 will need testing too. */
6490 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6491 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6492 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6494 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6495 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6496 /* Exclude stfqu. psq_stu as above for psq_lu. */
6497 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6498 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6499 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6500 && (insn
& 1) == 0));
6503 // Scan a relocation for a local symbol.
6505 template<int size
, bool big_endian
>
6507 Target_powerpc
<size
, big_endian
>::Scan::local(
6508 Symbol_table
* symtab
,
6510 Target_powerpc
<size
, big_endian
>* target
,
6511 Sized_relobj_file
<size
, big_endian
>* object
,
6512 unsigned int data_shndx
,
6513 Output_section
* output_section
,
6514 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6515 unsigned int r_type
,
6516 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6519 this->maybe_skip_tls_get_addr_call(target
, r_type
, NULL
);
6521 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6522 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6524 this->expect_tls_get_addr_call();
6525 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6526 if (tls_type
!= tls::TLSOPT_NONE
)
6527 this->skip_next_tls_get_addr_call();
6529 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6530 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6532 this->expect_tls_get_addr_call();
6533 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6534 if (tls_type
!= tls::TLSOPT_NONE
)
6535 this->skip_next_tls_get_addr_call();
6538 Powerpc_relobj
<size
, big_endian
>* ppc_object
6539 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6544 && data_shndx
== ppc_object
->opd_shndx()
6545 && r_type
== elfcpp::R_PPC64_ADDR64
)
6546 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6550 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6551 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6552 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6554 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6555 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6556 r_type
, r_sym
, reloc
.get_r_addend());
6557 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6562 case elfcpp::R_POWERPC_NONE
:
6563 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6564 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6565 case elfcpp::R_POWERPC_TLS
:
6566 case elfcpp::R_PPC64_ENTRY
:
6569 case elfcpp::R_PPC64_TOC
:
6571 Output_data_got_powerpc
<size
, big_endian
>* got
6572 = target
->got_section(symtab
, layout
);
6573 if (parameters
->options().output_is_position_independent())
6575 Address off
= reloc
.get_r_offset();
6577 && target
->abiversion() < 2
6578 && data_shndx
== ppc_object
->opd_shndx()
6579 && ppc_object
->get_opd_discard(off
- 8))
6582 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6583 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6584 rela_dyn
->add_output_section_relative(got
->output_section(),
6585 elfcpp::R_POWERPC_RELATIVE
,
6587 object
, data_shndx
, off
,
6588 symobj
->toc_base_offset());
6593 case elfcpp::R_PPC64_ADDR64
:
6594 case elfcpp::R_PPC64_UADDR64
:
6595 case elfcpp::R_POWERPC_ADDR32
:
6596 case elfcpp::R_POWERPC_UADDR32
:
6597 case elfcpp::R_POWERPC_ADDR24
:
6598 case elfcpp::R_POWERPC_ADDR16
:
6599 case elfcpp::R_POWERPC_ADDR16_LO
:
6600 case elfcpp::R_POWERPC_ADDR16_HI
:
6601 case elfcpp::R_POWERPC_ADDR16_HA
:
6602 case elfcpp::R_POWERPC_UADDR16
:
6603 case elfcpp::R_PPC64_ADDR16_HIGH
:
6604 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6605 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6606 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6607 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6608 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6609 case elfcpp::R_PPC64_ADDR16_DS
:
6610 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6611 case elfcpp::R_POWERPC_ADDR14
:
6612 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6613 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6614 // If building a shared library (or a position-independent
6615 // executable), we need to create a dynamic relocation for
6617 if (parameters
->options().output_is_position_independent()
6618 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6620 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6622 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6623 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6624 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6626 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6627 : elfcpp::R_POWERPC_RELATIVE
);
6628 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6629 output_section
, data_shndx
,
6630 reloc
.get_r_offset(),
6631 reloc
.get_r_addend(), false);
6633 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6635 check_non_pic(object
, r_type
);
6636 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6637 data_shndx
, reloc
.get_r_offset(),
6638 reloc
.get_r_addend());
6642 gold_assert(lsym
.get_st_value() == 0);
6643 unsigned int shndx
= lsym
.get_st_shndx();
6645 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6648 object
->error(_("section symbol %u has bad shndx %u"),
6651 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6652 output_section
, data_shndx
,
6653 reloc
.get_r_offset());
6658 case elfcpp::R_POWERPC_REL24
:
6659 case elfcpp::R_PPC_PLTREL24
:
6660 case elfcpp::R_PPC_LOCAL24PC
:
6661 case elfcpp::R_POWERPC_REL14
:
6662 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6663 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6666 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6667 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6668 r_type
, r_sym
, reloc
.get_r_addend());
6672 case elfcpp::R_PPC64_TOCSAVE
:
6673 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6674 // caller has already saved r2 and thus a plt call stub need not
6677 && target
->mark_pltcall(ppc_object
, data_shndx
,
6678 reloc
.get_r_offset() - 4, symtab
))
6680 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6681 unsigned int shndx
= lsym
.get_st_shndx();
6683 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6685 object
->error(_("tocsave symbol %u has bad shndx %u"),
6688 target
->add_tocsave(ppc_object
, shndx
,
6689 lsym
.get_st_value() + reloc
.get_r_addend());
6693 case elfcpp::R_PPC64_REL64
:
6694 case elfcpp::R_POWERPC_REL32
:
6695 case elfcpp::R_POWERPC_REL16
:
6696 case elfcpp::R_POWERPC_REL16_LO
:
6697 case elfcpp::R_POWERPC_REL16_HI
:
6698 case elfcpp::R_POWERPC_REL16_HA
:
6699 case elfcpp::R_POWERPC_REL16DX_HA
:
6700 case elfcpp::R_POWERPC_SECTOFF
:
6701 case elfcpp::R_POWERPC_SECTOFF_LO
:
6702 case elfcpp::R_POWERPC_SECTOFF_HI
:
6703 case elfcpp::R_POWERPC_SECTOFF_HA
:
6704 case elfcpp::R_PPC64_SECTOFF_DS
:
6705 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6706 case elfcpp::R_POWERPC_TPREL16
:
6707 case elfcpp::R_POWERPC_TPREL16_LO
:
6708 case elfcpp::R_POWERPC_TPREL16_HI
:
6709 case elfcpp::R_POWERPC_TPREL16_HA
:
6710 case elfcpp::R_PPC64_TPREL16_DS
:
6711 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6712 case elfcpp::R_PPC64_TPREL16_HIGH
:
6713 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6714 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6715 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6716 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6717 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6718 case elfcpp::R_POWERPC_DTPREL16
:
6719 case elfcpp::R_POWERPC_DTPREL16_LO
:
6720 case elfcpp::R_POWERPC_DTPREL16_HI
:
6721 case elfcpp::R_POWERPC_DTPREL16_HA
:
6722 case elfcpp::R_PPC64_DTPREL16_DS
:
6723 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6724 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6725 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6726 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6727 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6728 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6729 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6730 case elfcpp::R_PPC64_TLSGD
:
6731 case elfcpp::R_PPC64_TLSLD
:
6732 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6735 case elfcpp::R_POWERPC_GOT16
:
6736 case elfcpp::R_POWERPC_GOT16_LO
:
6737 case elfcpp::R_POWERPC_GOT16_HI
:
6738 case elfcpp::R_POWERPC_GOT16_HA
:
6739 case elfcpp::R_PPC64_GOT16_DS
:
6740 case elfcpp::R_PPC64_GOT16_LO_DS
:
6742 // The symbol requires a GOT entry.
6743 Output_data_got_powerpc
<size
, big_endian
>* got
6744 = target
->got_section(symtab
, layout
);
6745 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6747 if (!parameters
->options().output_is_position_independent())
6750 && (size
== 32 || target
->abiversion() >= 2))
6751 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6753 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6755 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6757 // If we are generating a shared object or a pie, this
6758 // symbol's GOT entry will be set by a dynamic relocation.
6760 off
= got
->add_constant(0);
6761 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6763 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6765 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6766 : elfcpp::R_POWERPC_RELATIVE
);
6767 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6768 got
, off
, 0, false);
6773 case elfcpp::R_PPC64_TOC16
:
6774 case elfcpp::R_PPC64_TOC16_LO
:
6775 case elfcpp::R_PPC64_TOC16_HI
:
6776 case elfcpp::R_PPC64_TOC16_HA
:
6777 case elfcpp::R_PPC64_TOC16_DS
:
6778 case elfcpp::R_PPC64_TOC16_LO_DS
:
6779 // We need a GOT section.
6780 target
->got_section(symtab
, layout
);
6783 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6784 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6785 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6786 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6788 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6789 if (tls_type
== tls::TLSOPT_NONE
)
6791 Output_data_got_powerpc
<size
, big_endian
>* got
6792 = target
->got_section(symtab
, layout
);
6793 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6794 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6795 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6796 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6798 else if (tls_type
== tls::TLSOPT_TO_LE
)
6800 // no GOT relocs needed for Local Exec.
6807 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6808 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6809 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6810 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6812 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6813 if (tls_type
== tls::TLSOPT_NONE
)
6814 target
->tlsld_got_offset(symtab
, layout
, object
);
6815 else if (tls_type
== tls::TLSOPT_TO_LE
)
6817 // no GOT relocs needed for Local Exec.
6818 if (parameters
->options().emit_relocs())
6820 Output_section
* os
= layout
->tls_segment()->first_section();
6821 gold_assert(os
!= NULL
);
6822 os
->set_needs_symtab_index();
6830 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6831 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6832 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6833 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6835 Output_data_got_powerpc
<size
, big_endian
>* got
6836 = target
->got_section(symtab
, layout
);
6837 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6838 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6842 case elfcpp::R_POWERPC_GOT_TPREL16
:
6843 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6844 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6845 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6847 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6848 if (tls_type
== tls::TLSOPT_NONE
)
6850 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6851 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6853 Output_data_got_powerpc
<size
, big_endian
>* got
6854 = target
->got_section(symtab
, layout
);
6855 unsigned int off
= got
->add_constant(0);
6856 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6858 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6859 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6860 elfcpp::R_POWERPC_TPREL
,
6864 else if (tls_type
== tls::TLSOPT_TO_LE
)
6866 // no GOT relocs needed for Local Exec.
6874 unsupported_reloc_local(object
, r_type
);
6879 && parameters
->options().toc_optimize())
6881 if (data_shndx
== ppc_object
->toc_shndx())
6884 if (r_type
!= elfcpp::R_PPC64_ADDR64
6885 || (is_ifunc
&& target
->abiversion() < 2))
6887 else if (parameters
->options().output_is_position_independent())
6893 unsigned int shndx
= lsym
.get_st_shndx();
6894 if (shndx
>= elfcpp::SHN_LORESERVE
6895 && shndx
!= elfcpp::SHN_XINDEX
)
6900 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6903 enum {no_check
, check_lo
, check_ha
} insn_check
;
6907 insn_check
= no_check
;
6910 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6911 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6912 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6913 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6914 case elfcpp::R_POWERPC_GOT16_HA
:
6915 case elfcpp::R_PPC64_TOC16_HA
:
6916 insn_check
= check_ha
;
6919 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6920 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6921 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6922 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6923 case elfcpp::R_POWERPC_GOT16_LO
:
6924 case elfcpp::R_PPC64_GOT16_LO_DS
:
6925 case elfcpp::R_PPC64_TOC16_LO
:
6926 case elfcpp::R_PPC64_TOC16_LO_DS
:
6927 insn_check
= check_lo
;
6931 section_size_type slen
;
6932 const unsigned char* view
= NULL
;
6933 if (insn_check
!= no_check
)
6935 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6936 section_size_type off
=
6937 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6940 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6941 if (insn_check
== check_lo
6942 ? !ok_lo_toc_insn(insn
, r_type
)
6943 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6944 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6946 ppc_object
->set_no_toc_opt();
6947 gold_warning(_("%s: toc optimization is not supported "
6948 "for %#08x instruction"),
6949 ppc_object
->name().c_str(), insn
);
6958 case elfcpp::R_PPC64_TOC16
:
6959 case elfcpp::R_PPC64_TOC16_LO
:
6960 case elfcpp::R_PPC64_TOC16_HI
:
6961 case elfcpp::R_PPC64_TOC16_HA
:
6962 case elfcpp::R_PPC64_TOC16_DS
:
6963 case elfcpp::R_PPC64_TOC16_LO_DS
:
6964 unsigned int shndx
= lsym
.get_st_shndx();
6965 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6967 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6968 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6970 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_addend();
6971 if (dst_off
< ppc_object
->section_size(shndx
))
6974 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6976 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6978 // Need to check that the insn is a ld
6980 view
= ppc_object
->section_contents(data_shndx
,
6983 section_size_type off
=
6984 (convert_to_section_size_type(reloc
.get_r_offset())
6985 + (big_endian
? -2 : 3));
6987 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6991 ppc_object
->set_no_toc_opt(dst_off
);
7002 case elfcpp::R_POWERPC_REL32
:
7003 if (ppc_object
->got2_shndx() != 0
7004 && parameters
->options().output_is_position_independent())
7006 unsigned int shndx
= lsym
.get_st_shndx();
7007 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7009 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7010 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
7011 && (ppc_object
->section_flags(data_shndx
)
7012 & elfcpp::SHF_EXECINSTR
) != 0)
7013 gold_error(_("%s: unsupported -mbss-plt code"),
7014 ppc_object
->name().c_str());
7024 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7025 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7026 case elfcpp::R_POWERPC_GOT_TPREL16
:
7027 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7028 case elfcpp::R_POWERPC_GOT16
:
7029 case elfcpp::R_PPC64_GOT16_DS
:
7030 case elfcpp::R_PPC64_TOC16
:
7031 case elfcpp::R_PPC64_TOC16_DS
:
7032 ppc_object
->set_has_small_toc_reloc();
7038 // Report an unsupported relocation against a global symbol.
7040 template<int size
, bool big_endian
>
7042 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
7043 Sized_relobj_file
<size
, big_endian
>* object
,
7044 unsigned int r_type
,
7047 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
7048 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
7051 // Scan a relocation for a global symbol.
7053 template<int size
, bool big_endian
>
7055 Target_powerpc
<size
, big_endian
>::Scan::global(
7056 Symbol_table
* symtab
,
7058 Target_powerpc
<size
, big_endian
>* target
,
7059 Sized_relobj_file
<size
, big_endian
>* object
,
7060 unsigned int data_shndx
,
7061 Output_section
* output_section
,
7062 const elfcpp::Rela
<size
, big_endian
>& reloc
,
7063 unsigned int r_type
,
7066 if (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
)
7070 if (target
->replace_tls_get_addr(gsym
))
7071 // Change a __tls_get_addr reference to __tls_get_addr_opt
7072 // so dynamic relocs are emitted against the latter symbol.
7073 gsym
= target
->tls_get_addr_opt();
7075 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7076 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7078 this->expect_tls_get_addr_call();
7079 const bool final
= gsym
->final_value_is_known();
7080 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7081 if (tls_type
!= tls::TLSOPT_NONE
)
7082 this->skip_next_tls_get_addr_call();
7084 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7085 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7087 this->expect_tls_get_addr_call();
7088 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7089 if (tls_type
!= tls::TLSOPT_NONE
)
7090 this->skip_next_tls_get_addr_call();
7093 Powerpc_relobj
<size
, big_endian
>* ppc_object
7094 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7096 // A STT_GNU_IFUNC symbol may require a PLT entry.
7097 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
7098 bool pushed_ifunc
= false;
7099 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
7101 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7102 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7103 r_type
, r_sym
, reloc
.get_r_addend());
7104 target
->make_plt_entry(symtab
, layout
, gsym
);
7105 pushed_ifunc
= true;
7110 case elfcpp::R_POWERPC_NONE
:
7111 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7112 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7113 case elfcpp::R_PPC_LOCAL24PC
:
7114 case elfcpp::R_POWERPC_TLS
:
7115 case elfcpp::R_PPC64_ENTRY
:
7118 case elfcpp::R_PPC64_TOC
:
7120 Output_data_got_powerpc
<size
, big_endian
>* got
7121 = target
->got_section(symtab
, layout
);
7122 if (parameters
->options().output_is_position_independent())
7124 Address off
= reloc
.get_r_offset();
7126 && data_shndx
== ppc_object
->opd_shndx()
7127 && ppc_object
->get_opd_discard(off
- 8))
7130 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7131 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
7132 if (data_shndx
!= ppc_object
->opd_shndx())
7133 symobj
= static_cast
7134 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7135 rela_dyn
->add_output_section_relative(got
->output_section(),
7136 elfcpp::R_POWERPC_RELATIVE
,
7138 object
, data_shndx
, off
,
7139 symobj
->toc_base_offset());
7144 case elfcpp::R_PPC64_ADDR64
:
7146 && target
->abiversion() < 2
7147 && data_shndx
== ppc_object
->opd_shndx()
7148 && (gsym
->is_defined_in_discarded_section()
7149 || gsym
->object() != object
))
7151 ppc_object
->set_opd_discard(reloc
.get_r_offset());
7155 case elfcpp::R_PPC64_UADDR64
:
7156 case elfcpp::R_POWERPC_ADDR32
:
7157 case elfcpp::R_POWERPC_UADDR32
:
7158 case elfcpp::R_POWERPC_ADDR24
:
7159 case elfcpp::R_POWERPC_ADDR16
:
7160 case elfcpp::R_POWERPC_ADDR16_LO
:
7161 case elfcpp::R_POWERPC_ADDR16_HI
:
7162 case elfcpp::R_POWERPC_ADDR16_HA
:
7163 case elfcpp::R_POWERPC_UADDR16
:
7164 case elfcpp::R_PPC64_ADDR16_HIGH
:
7165 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7166 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7167 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7168 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7169 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7170 case elfcpp::R_PPC64_ADDR16_DS
:
7171 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7172 case elfcpp::R_POWERPC_ADDR14
:
7173 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7174 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7176 // Make a PLT entry if necessary.
7177 if (gsym
->needs_plt_entry())
7179 // Since this is not a PC-relative relocation, we may be
7180 // taking the address of a function. In that case we need to
7181 // set the entry in the dynamic symbol table to the address of
7182 // the PLT call stub.
7183 bool need_ifunc_plt
= false;
7184 if ((size
== 32 || target
->abiversion() >= 2)
7185 && gsym
->is_from_dynobj()
7186 && !parameters
->options().output_is_position_independent())
7188 gsym
->set_needs_dynsym_value();
7189 need_ifunc_plt
= true;
7191 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
7193 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7194 target
->push_branch(ppc_object
, data_shndx
,
7195 reloc
.get_r_offset(), r_type
, r_sym
,
7196 reloc
.get_r_addend());
7197 target
->make_plt_entry(symtab
, layout
, gsym
);
7200 // Make a dynamic relocation if necessary.
7201 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
7202 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
7204 if (!parameters
->options().output_is_position_independent()
7205 && gsym
->may_need_copy_reloc())
7207 target
->copy_reloc(symtab
, layout
, object
,
7208 data_shndx
, output_section
, gsym
, reloc
);
7210 else if ((((size
== 32
7211 && r_type
== elfcpp::R_POWERPC_ADDR32
)
7213 && r_type
== elfcpp::R_PPC64_ADDR64
7214 && target
->abiversion() >= 2))
7215 && gsym
->can_use_relative_reloc(false)
7216 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
7217 && parameters
->options().shared()))
7219 && r_type
== elfcpp::R_PPC64_ADDR64
7220 && target
->abiversion() < 2
7221 && (gsym
->can_use_relative_reloc(false)
7222 || data_shndx
== ppc_object
->opd_shndx())))
7224 Reloc_section
* rela_dyn
7225 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7226 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7227 : elfcpp::R_POWERPC_RELATIVE
);
7228 rela_dyn
->add_symbolless_global_addend(
7229 gsym
, dynrel
, output_section
, object
, data_shndx
,
7230 reloc
.get_r_offset(), reloc
.get_r_addend());
7234 Reloc_section
* rela_dyn
7235 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7236 check_non_pic(object
, r_type
);
7237 rela_dyn
->add_global(gsym
, r_type
, output_section
,
7239 reloc
.get_r_offset(),
7240 reloc
.get_r_addend());
7243 && parameters
->options().toc_optimize()
7244 && data_shndx
== ppc_object
->toc_shndx())
7245 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7251 case elfcpp::R_PPC_PLTREL24
:
7252 case elfcpp::R_POWERPC_REL24
:
7255 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7256 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7257 r_type
, r_sym
, reloc
.get_r_addend());
7258 if (gsym
->needs_plt_entry()
7259 || (!gsym
->final_value_is_known()
7260 && (gsym
->is_undefined()
7261 || gsym
->is_from_dynobj()
7262 || gsym
->is_preemptible())))
7263 target
->make_plt_entry(symtab
, layout
, gsym
);
7267 case elfcpp::R_PPC64_REL64
:
7268 case elfcpp::R_POWERPC_REL32
:
7269 // Make a dynamic relocation if necessary.
7270 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
7272 if (!parameters
->options().output_is_position_independent()
7273 && gsym
->may_need_copy_reloc())
7275 target
->copy_reloc(symtab
, layout
, object
,
7276 data_shndx
, output_section
, gsym
,
7281 Reloc_section
* rela_dyn
7282 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7283 check_non_pic(object
, r_type
);
7284 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
7285 data_shndx
, reloc
.get_r_offset(),
7286 reloc
.get_r_addend());
7291 case elfcpp::R_POWERPC_REL14
:
7292 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7293 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7296 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7297 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7298 r_type
, r_sym
, reloc
.get_r_addend());
7302 case elfcpp::R_PPC64_TOCSAVE
:
7303 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7304 // caller has already saved r2 and thus a plt call stub need not
7307 && target
->mark_pltcall(ppc_object
, data_shndx
,
7308 reloc
.get_r_offset() - 4, symtab
))
7310 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7312 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7314 object
->error(_("tocsave symbol %u has bad shndx %u"),
7318 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7319 target
->add_tocsave(ppc_object
, shndx
,
7320 sym
->value() + reloc
.get_r_addend());
7325 case elfcpp::R_POWERPC_REL16
:
7326 case elfcpp::R_POWERPC_REL16_LO
:
7327 case elfcpp::R_POWERPC_REL16_HI
:
7328 case elfcpp::R_POWERPC_REL16_HA
:
7329 case elfcpp::R_POWERPC_REL16DX_HA
:
7330 case elfcpp::R_POWERPC_SECTOFF
:
7331 case elfcpp::R_POWERPC_SECTOFF_LO
:
7332 case elfcpp::R_POWERPC_SECTOFF_HI
:
7333 case elfcpp::R_POWERPC_SECTOFF_HA
:
7334 case elfcpp::R_PPC64_SECTOFF_DS
:
7335 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7336 case elfcpp::R_POWERPC_TPREL16
:
7337 case elfcpp::R_POWERPC_TPREL16_LO
:
7338 case elfcpp::R_POWERPC_TPREL16_HI
:
7339 case elfcpp::R_POWERPC_TPREL16_HA
:
7340 case elfcpp::R_PPC64_TPREL16_DS
:
7341 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7342 case elfcpp::R_PPC64_TPREL16_HIGH
:
7343 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7344 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7345 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7346 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7347 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7348 case elfcpp::R_POWERPC_DTPREL16
:
7349 case elfcpp::R_POWERPC_DTPREL16_LO
:
7350 case elfcpp::R_POWERPC_DTPREL16_HI
:
7351 case elfcpp::R_POWERPC_DTPREL16_HA
:
7352 case elfcpp::R_PPC64_DTPREL16_DS
:
7353 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7354 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7355 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7356 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7357 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7358 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7359 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7360 case elfcpp::R_PPC64_TLSGD
:
7361 case elfcpp::R_PPC64_TLSLD
:
7362 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7365 case elfcpp::R_POWERPC_GOT16
:
7366 case elfcpp::R_POWERPC_GOT16_LO
:
7367 case elfcpp::R_POWERPC_GOT16_HI
:
7368 case elfcpp::R_POWERPC_GOT16_HA
:
7369 case elfcpp::R_PPC64_GOT16_DS
:
7370 case elfcpp::R_PPC64_GOT16_LO_DS
:
7372 // The symbol requires a GOT entry.
7373 Output_data_got_powerpc
<size
, big_endian
>* got
;
7375 got
= target
->got_section(symtab
, layout
);
7376 if (gsym
->final_value_is_known())
7379 && (size
== 32 || target
->abiversion() >= 2))
7380 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7382 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7384 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7386 // If we are generating a shared object or a pie, this
7387 // symbol's GOT entry will be set by a dynamic relocation.
7388 unsigned int off
= got
->add_constant(0);
7389 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7391 Reloc_section
* rela_dyn
7392 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7394 if (gsym
->can_use_relative_reloc(false)
7396 || target
->abiversion() >= 2)
7397 && gsym
->visibility() == elfcpp::STV_PROTECTED
7398 && parameters
->options().shared()))
7400 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7401 : elfcpp::R_POWERPC_RELATIVE
);
7402 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7406 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7407 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7413 case elfcpp::R_PPC64_TOC16
:
7414 case elfcpp::R_PPC64_TOC16_LO
:
7415 case elfcpp::R_PPC64_TOC16_HI
:
7416 case elfcpp::R_PPC64_TOC16_HA
:
7417 case elfcpp::R_PPC64_TOC16_DS
:
7418 case elfcpp::R_PPC64_TOC16_LO_DS
:
7419 // We need a GOT section.
7420 target
->got_section(symtab
, layout
);
7423 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7424 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7425 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7426 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7428 const bool final
= gsym
->final_value_is_known();
7429 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7430 if (tls_type
== tls::TLSOPT_NONE
)
7432 Output_data_got_powerpc
<size
, big_endian
>* got
7433 = target
->got_section(symtab
, layout
);
7434 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7435 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7436 elfcpp::R_POWERPC_DTPMOD
,
7437 elfcpp::R_POWERPC_DTPREL
);
7439 else if (tls_type
== tls::TLSOPT_TO_IE
)
7441 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7443 Output_data_got_powerpc
<size
, big_endian
>* got
7444 = target
->got_section(symtab
, layout
);
7445 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7446 if (gsym
->is_undefined()
7447 || gsym
->is_from_dynobj())
7449 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7450 elfcpp::R_POWERPC_TPREL
);
7454 unsigned int off
= got
->add_constant(0);
7455 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7456 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7457 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7462 else if (tls_type
== tls::TLSOPT_TO_LE
)
7464 // no GOT relocs needed for Local Exec.
7471 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7472 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7473 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7474 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7476 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7477 if (tls_type
== tls::TLSOPT_NONE
)
7478 target
->tlsld_got_offset(symtab
, layout
, object
);
7479 else if (tls_type
== tls::TLSOPT_TO_LE
)
7481 // no GOT relocs needed for Local Exec.
7482 if (parameters
->options().emit_relocs())
7484 Output_section
* os
= layout
->tls_segment()->first_section();
7485 gold_assert(os
!= NULL
);
7486 os
->set_needs_symtab_index();
7494 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7495 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7496 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7497 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7499 Output_data_got_powerpc
<size
, big_endian
>* got
7500 = target
->got_section(symtab
, layout
);
7501 if (!gsym
->final_value_is_known()
7502 && (gsym
->is_from_dynobj()
7503 || gsym
->is_undefined()
7504 || gsym
->is_preemptible()))
7505 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7506 target
->rela_dyn_section(layout
),
7507 elfcpp::R_POWERPC_DTPREL
);
7509 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7513 case elfcpp::R_POWERPC_GOT_TPREL16
:
7514 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7515 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7516 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7518 const bool final
= gsym
->final_value_is_known();
7519 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7520 if (tls_type
== tls::TLSOPT_NONE
)
7522 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7524 Output_data_got_powerpc
<size
, big_endian
>* got
7525 = target
->got_section(symtab
, layout
);
7526 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7527 if (gsym
->is_undefined()
7528 || gsym
->is_from_dynobj())
7530 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7531 elfcpp::R_POWERPC_TPREL
);
7535 unsigned int off
= got
->add_constant(0);
7536 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7537 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7538 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7543 else if (tls_type
== tls::TLSOPT_TO_LE
)
7545 // no GOT relocs needed for Local Exec.
7553 unsupported_reloc_global(object
, r_type
, gsym
);
7558 && parameters
->options().toc_optimize())
7560 if (data_shndx
== ppc_object
->toc_shndx())
7563 if (r_type
!= elfcpp::R_PPC64_ADDR64
7564 || (is_ifunc
&& target
->abiversion() < 2))
7566 else if (parameters
->options().output_is_position_independent()
7567 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7570 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7573 enum {no_check
, check_lo
, check_ha
} insn_check
;
7577 insn_check
= no_check
;
7580 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7581 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7582 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7583 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7584 case elfcpp::R_POWERPC_GOT16_HA
:
7585 case elfcpp::R_PPC64_TOC16_HA
:
7586 insn_check
= check_ha
;
7589 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7590 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7591 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7592 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7593 case elfcpp::R_POWERPC_GOT16_LO
:
7594 case elfcpp::R_PPC64_GOT16_LO_DS
:
7595 case elfcpp::R_PPC64_TOC16_LO
:
7596 case elfcpp::R_PPC64_TOC16_LO_DS
:
7597 insn_check
= check_lo
;
7601 section_size_type slen
;
7602 const unsigned char* view
= NULL
;
7603 if (insn_check
!= no_check
)
7605 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7606 section_size_type off
=
7607 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7610 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7611 if (insn_check
== check_lo
7612 ? !ok_lo_toc_insn(insn
, r_type
)
7613 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7614 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7616 ppc_object
->set_no_toc_opt();
7617 gold_warning(_("%s: toc optimization is not supported "
7618 "for %#08x instruction"),
7619 ppc_object
->name().c_str(), insn
);
7628 case elfcpp::R_PPC64_TOC16
:
7629 case elfcpp::R_PPC64_TOC16_LO
:
7630 case elfcpp::R_PPC64_TOC16_HI
:
7631 case elfcpp::R_PPC64_TOC16_HA
:
7632 case elfcpp::R_PPC64_TOC16_DS
:
7633 case elfcpp::R_PPC64_TOC16_LO_DS
:
7634 if (gsym
->source() == Symbol::FROM_OBJECT
7635 && !gsym
->object()->is_dynamic())
7637 Powerpc_relobj
<size
, big_endian
>* sym_object
7638 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7640 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7641 if (shndx
== sym_object
->toc_shndx())
7643 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7644 Address dst_off
= sym
->value() + reloc
.get_r_addend();
7645 if (dst_off
< sym_object
->section_size(shndx
))
7648 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7650 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7652 // Need to check that the insn is a ld
7654 view
= ppc_object
->section_contents(data_shndx
,
7657 section_size_type off
=
7658 (convert_to_section_size_type(reloc
.get_r_offset())
7659 + (big_endian
? -2 : 3));
7661 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7665 sym_object
->set_no_toc_opt(dst_off
);
7677 case elfcpp::R_PPC_LOCAL24PC
:
7678 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7679 gold_error(_("%s: unsupported -mbss-plt code"),
7680 ppc_object
->name().c_str());
7689 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7690 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7691 case elfcpp::R_POWERPC_GOT_TPREL16
:
7692 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7693 case elfcpp::R_POWERPC_GOT16
:
7694 case elfcpp::R_PPC64_GOT16_DS
:
7695 case elfcpp::R_PPC64_TOC16
:
7696 case elfcpp::R_PPC64_TOC16_DS
:
7697 ppc_object
->set_has_small_toc_reloc();
7703 // Process relocations for gc.
7705 template<int size
, bool big_endian
>
7707 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
7708 Symbol_table
* symtab
,
7710 Sized_relobj_file
<size
, big_endian
>* object
,
7711 unsigned int data_shndx
,
7713 const unsigned char* prelocs
,
7715 Output_section
* output_section
,
7716 bool needs_special_offset_handling
,
7717 size_t local_symbol_count
,
7718 const unsigned char* plocal_symbols
)
7720 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7721 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7724 Powerpc_relobj
<size
, big_endian
>* ppc_object
7725 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7727 ppc_object
->set_opd_valid();
7728 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7730 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7731 for (p
= ppc_object
->access_from_map()->begin();
7732 p
!= ppc_object
->access_from_map()->end();
7735 Address dst_off
= p
->first
;
7736 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7737 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7738 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7740 Relobj
* src_obj
= s
->first
;
7741 unsigned int src_indx
= s
->second
;
7742 symtab
->gc()->add_reference(src_obj
, src_indx
,
7743 ppc_object
, dst_indx
);
7747 ppc_object
->access_from_map()->clear();
7748 ppc_object
->process_gc_mark(symtab
);
7749 // Don't look at .opd relocs as .opd will reference everything.
7753 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7762 needs_special_offset_handling
,
7767 // Handle target specific gc actions when adding a gc reference from
7768 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7769 // and DST_OFF. For powerpc64, this adds a referenc to the code
7770 // section of a function descriptor.
7772 template<int size
, bool big_endian
>
7774 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7775 Symbol_table
* symtab
,
7777 unsigned int src_shndx
,
7779 unsigned int dst_shndx
,
7780 Address dst_off
) const
7782 if (size
!= 64 || dst_obj
->is_dynamic())
7785 Powerpc_relobj
<size
, big_endian
>* ppc_object
7786 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7787 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7789 if (ppc_object
->opd_valid())
7791 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7792 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7796 // If we haven't run scan_opd_relocs, we must delay
7797 // processing this function descriptor reference.
7798 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7803 // Add any special sections for this symbol to the gc work list.
7804 // For powerpc64, this adds the code section of a function
7807 template<int size
, bool big_endian
>
7809 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7810 Symbol_table
* symtab
,
7815 Powerpc_relobj
<size
, big_endian
>* ppc_object
7816 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7818 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7819 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7821 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7822 Address dst_off
= gsym
->value();
7823 if (ppc_object
->opd_valid())
7825 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7826 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7830 ppc_object
->add_gc_mark(dst_off
);
7835 // For a symbol location in .opd, set LOC to the location of the
7838 template<int size
, bool big_endian
>
7840 Target_powerpc
<size
, big_endian
>::do_function_location(
7841 Symbol_location
* loc
) const
7843 if (size
== 64 && loc
->shndx
!= 0)
7845 if (loc
->object
->is_dynamic())
7847 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7848 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7849 if (loc
->shndx
== ppc_object
->opd_shndx())
7852 Address off
= loc
->offset
- ppc_object
->opd_address();
7853 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7854 loc
->offset
= dest_off
;
7859 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7860 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7861 if (loc
->shndx
== ppc_object
->opd_shndx())
7864 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7865 loc
->offset
= dest_off
;
7871 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7872 // compiled with -fsplit-stack. The function calls non-split-stack
7873 // code. Change the function to ensure it has enough stack space to
7874 // call some random function.
7876 template<int size
, bool big_endian
>
7878 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7881 section_offset_type fnoffset
,
7882 section_size_type fnsize
,
7883 const unsigned char* prelocs
,
7885 unsigned char* view
,
7886 section_size_type view_size
,
7888 std::string
* to
) const
7890 // 32-bit not supported.
7894 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7895 prelocs
, reloc_count
, view
, view_size
,
7900 // The function always starts with
7901 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7902 // addis %r12,%r1,-allocate@ha
7903 // addi %r12,%r12,-allocate@l
7905 // but note that the addis or addi may be replaced with a nop
7907 unsigned char *entry
= view
+ fnoffset
;
7908 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7910 if ((insn
& 0xffff0000) == addis_2_12
)
7912 /* Skip ELFv2 global entry code. */
7914 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7917 unsigned char *pinsn
= entry
;
7919 const uint32_t ld_private_ss
= 0xe80d8fc0;
7920 if (insn
== ld_private_ss
)
7922 int32_t allocate
= 0;
7926 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7927 if ((insn
& 0xffff0000) == addis_12_1
)
7928 allocate
+= (insn
& 0xffff) << 16;
7929 else if ((insn
& 0xffff0000) == addi_12_1
7930 || (insn
& 0xffff0000) == addi_12_12
)
7931 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7932 else if (insn
!= nop
)
7935 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7937 int extra
= parameters
->options().split_stack_adjust_size();
7939 if (allocate
>= 0 || extra
< 0)
7941 object
->error(_("split-stack stack size overflow at "
7942 "section %u offset %0zx"),
7943 shndx
, static_cast<size_t>(fnoffset
));
7947 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7948 if (insn
!= addis_12_1
)
7950 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7952 insn
= addi_12_12
| (allocate
& 0xffff);
7953 if (insn
!= addi_12_12
)
7955 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7961 insn
= addi_12_1
| (allocate
& 0xffff);
7962 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7965 if (pinsn
!= entry
+ 12)
7966 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7974 if (!object
->has_no_split_stack())
7975 object
->error(_("failed to match split-stack sequence at "
7976 "section %u offset %0zx"),
7977 shndx
, static_cast<size_t>(fnoffset
));
7981 // Scan relocations for a section.
7983 template<int size
, bool big_endian
>
7985 Target_powerpc
<size
, big_endian
>::scan_relocs(
7986 Symbol_table
* symtab
,
7988 Sized_relobj_file
<size
, big_endian
>* object
,
7989 unsigned int data_shndx
,
7990 unsigned int sh_type
,
7991 const unsigned char* prelocs
,
7993 Output_section
* output_section
,
7994 bool needs_special_offset_handling
,
7995 size_t local_symbol_count
,
7996 const unsigned char* plocal_symbols
)
7998 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7999 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8002 if (!this->plt_localentry0_init_
)
8004 bool plt_localentry0
= false;
8006 && this->abiversion() >= 2)
8008 if (parameters
->options().user_set_plt_localentry())
8009 plt_localentry0
= parameters
->options().plt_localentry();
8011 && symtab
->lookup("GLIBC_2.26", NULL
) == NULL
)
8012 gold_warning(_("--plt-localentry is especially dangerous without "
8013 "ld.so support to detect ABI violations"));
8015 this->plt_localentry0_
= plt_localentry0
;
8016 this->plt_localentry0_init_
= true;
8019 if (sh_type
== elfcpp::SHT_REL
)
8021 gold_error(_("%s: unsupported REL reloc section"),
8022 object
->name().c_str());
8026 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
8035 needs_special_offset_handling
,
8040 // Functor class for processing the global symbol table.
8041 // Removes symbols defined on discarded opd entries.
8043 template<bool big_endian
>
8044 class Global_symbol_visitor_opd
8047 Global_symbol_visitor_opd()
8051 operator()(Sized_symbol
<64>* sym
)
8053 if (sym
->has_symtab_index()
8054 || sym
->source() != Symbol::FROM_OBJECT
8055 || !sym
->in_real_elf())
8058 if (sym
->object()->is_dynamic())
8061 Powerpc_relobj
<64, big_endian
>* symobj
8062 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
8063 if (symobj
->opd_shndx() == 0)
8067 unsigned int shndx
= sym
->shndx(&is_ordinary
);
8068 if (shndx
== symobj
->opd_shndx()
8069 && symobj
->get_opd_discard(sym
->value()))
8071 sym
->set_undefined();
8072 sym
->set_visibility(elfcpp::STV_DEFAULT
);
8073 sym
->set_is_defined_in_discarded_section();
8074 sym
->set_symtab_index(-1U);
8079 template<int size
, bool big_endian
>
8081 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
8083 Symbol_table
* symtab
)
8087 Output_data_save_res
<size
, big_endian
>* savres
8088 = new Output_data_save_res
<size
, big_endian
>(symtab
);
8089 this->savres_section_
= savres
;
8090 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8091 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
8092 savres
, ORDER_TEXT
, false);
8096 // Sort linker created .got section first (for the header), then input
8097 // sections belonging to files using small model code.
8099 template<bool big_endian
>
8100 class Sort_toc_sections
8104 operator()(const Output_section::Input_section
& is1
,
8105 const Output_section::Input_section
& is2
) const
8107 if (!is1
.is_input_section() && is2
.is_input_section())
8110 = (is1
.is_input_section()
8111 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
8112 ->has_small_toc_reloc()));
8114 = (is2
.is_input_section()
8115 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
8116 ->has_small_toc_reloc()));
8117 return small1
&& !small2
;
8121 // Finalize the sections.
8123 template<int size
, bool big_endian
>
8125 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
8127 const Input_objects
*,
8128 Symbol_table
* symtab
)
8130 if (parameters
->doing_static_link())
8132 // At least some versions of glibc elf-init.o have a strong
8133 // reference to __rela_iplt marker syms. A weak ref would be
8135 if (this->iplt_
!= NULL
)
8137 Reloc_section
* rel
= this->iplt_
->rel_plt();
8138 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
8139 Symbol_table::PREDEFINED
, rel
, 0, 0,
8140 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8141 elfcpp::STV_HIDDEN
, 0, false, true);
8142 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
8143 Symbol_table::PREDEFINED
, rel
, 0, 0,
8144 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8145 elfcpp::STV_HIDDEN
, 0, true, true);
8149 symtab
->define_as_constant("__rela_iplt_start", NULL
,
8150 Symbol_table::PREDEFINED
, 0, 0,
8151 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8152 elfcpp::STV_HIDDEN
, 0, true, false);
8153 symtab
->define_as_constant("__rela_iplt_end", NULL
,
8154 Symbol_table::PREDEFINED
, 0, 0,
8155 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8156 elfcpp::STV_HIDDEN
, 0, true, false);
8162 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
8163 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
8165 if (!parameters
->options().relocatable())
8167 this->define_save_restore_funcs(layout
, symtab
);
8169 // Annoyingly, we need to make these sections now whether or
8170 // not we need them. If we delay until do_relax then we
8171 // need to mess with the relaxation machinery checkpointing.
8172 this->got_section(symtab
, layout
);
8173 this->make_brlt_section(layout
);
8175 if (parameters
->options().toc_sort())
8177 Output_section
* os
= this->got_
->output_section();
8178 if (os
!= NULL
&& os
->input_sections().size() > 1)
8179 std::stable_sort(os
->input_sections().begin(),
8180 os
->input_sections().end(),
8181 Sort_toc_sections
<big_endian
>());
8186 // Fill in some more dynamic tags.
8187 Output_data_dynamic
* odyn
= layout
->dynamic_data();
8190 const Reloc_section
* rel_plt
= (this->plt_
== NULL
8192 : this->plt_
->rel_plt());
8193 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
8194 this->rela_dyn_
, true, size
== 32);
8198 if (this->got_
!= NULL
)
8200 this->got_
->finalize_data_size();
8201 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
8202 this->got_
, this->got_
->g_o_t());
8204 if (this->has_tls_get_addr_opt_
)
8205 odyn
->add_constant(elfcpp::DT_PPC_OPT
, elfcpp::PPC_OPT_TLS
);
8209 if (this->glink_
!= NULL
)
8211 this->glink_
->finalize_data_size();
8212 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
8214 (this->glink_
->pltresolve_size()
8217 if (this->has_localentry0_
|| this->has_tls_get_addr_opt_
)
8218 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
8219 ((this->has_localentry0_
8220 ? elfcpp::PPC64_OPT_LOCALENTRY
: 0)
8221 | (this->has_tls_get_addr_opt_
8222 ? elfcpp::PPC64_OPT_TLS
: 0)));
8226 // Emit any relocs we saved in an attempt to avoid generating COPY
8228 if (this->copy_relocs_
.any_saved_relocs())
8229 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
8232 // Emit any saved relocs, and mark toc entries using any of these
8233 // relocs as not optimizable.
8235 template<int sh_type
, int size
, bool big_endian
>
8237 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
8238 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
8241 && parameters
->options().toc_optimize())
8243 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8244 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8245 p
!= this->entries_
.end();
8248 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
8251 // If the symbol is no longer defined in a dynamic object,
8252 // then we emitted a COPY relocation. If it is still
8253 // dynamic then we'll need dynamic relocations and thus
8254 // can't optimize toc entries.
8255 if (entry
.sym_
->is_from_dynobj())
8257 Powerpc_relobj
<size
, big_endian
>* ppc_object
8258 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
8259 if (entry
.shndx_
== ppc_object
->toc_shndx())
8260 ppc_object
->set_no_toc_opt(entry
.address_
);
8265 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
8268 // Return the value to use for a branch relocation.
8270 template<int size
, bool big_endian
>
8272 Target_powerpc
<size
, big_endian
>::symval_for_branch(
8273 const Symbol_table
* symtab
,
8274 const Sized_symbol
<size
>* gsym
,
8275 Powerpc_relobj
<size
, big_endian
>* object
,
8277 unsigned int *dest_shndx
)
8279 if (size
== 32 || this->abiversion() >= 2)
8283 // If the symbol is defined in an opd section, ie. is a function
8284 // descriptor, use the function descriptor code entry address
8285 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
8287 && (gsym
->source() != Symbol::FROM_OBJECT
8288 || gsym
->object()->is_dynamic()))
8291 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
8292 unsigned int shndx
= symobj
->opd_shndx();
8295 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
8296 if (opd_addr
== invalid_address
)
8298 opd_addr
+= symobj
->output_section_address(shndx
);
8299 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
8302 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
8303 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
8306 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
8307 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
8308 *dest_shndx
= folded
.second
;
8310 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
8311 if (sec_addr
== invalid_address
)
8314 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
8315 *value
= sec_addr
+ sec_off
;
8320 // Perform a relocation.
8322 template<int size
, bool big_endian
>
8324 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
8325 const Relocate_info
<size
, big_endian
>* relinfo
,
8327 Target_powerpc
* target
,
8330 const unsigned char* preloc
,
8331 const Sized_symbol
<size
>* gsym
,
8332 const Symbol_value
<size
>* psymval
,
8333 unsigned char* view
,
8335 section_size_type view_size
)
8340 if (target
->replace_tls_get_addr(gsym
))
8341 gsym
= static_cast<const Sized_symbol
<size
>*>(target
->tls_get_addr_opt());
8343 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
8344 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
8345 switch (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
))
8347 case Track_tls::NOT_EXPECTED
:
8348 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8349 _("__tls_get_addr call lacks marker reloc"));
8351 case Track_tls::EXPECTED
:
8352 // We have already complained.
8354 case Track_tls::SKIP
:
8356 case Track_tls::NORMAL
:
8360 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8361 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8362 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8363 // Offset from start of insn to d-field reloc.
8364 const int d_offset
= big_endian
? 2 : 0;
8366 Powerpc_relobj
<size
, big_endian
>* const object
8367 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8369 bool has_stub_value
= false;
8370 bool localentry0
= false;
8371 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8373 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8374 : object
->local_has_plt_offset(r_sym
))
8375 && (!psymval
->is_ifunc_symbol()
8376 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8380 && target
->abiversion() >= 2
8381 && !parameters
->options().output_is_position_independent()
8382 && !is_branch_reloc(r_type
))
8384 Address off
= target
->glink_section()->find_global_entry(gsym
);
8385 if (off
!= invalid_address
)
8387 value
= target
->glink_section()->global_entry_address() + off
;
8388 has_stub_value
= true;
8393 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
8394 if (target
->stub_tables().size() == 1)
8395 stub_table
= target
->stub_tables()[0];
8396 if (stub_table
== NULL
8399 && !parameters
->options().output_is_position_independent()
8400 && !is_branch_reloc(r_type
)))
8401 stub_table
= object
->stub_table(relinfo
->data_shndx
);
8402 if (stub_table
== NULL
)
8404 // This is a ref from a data section to an ifunc symbol,
8405 // or a non-branch reloc for which we always want to use
8406 // one set of stubs for resolving function addresses.
8407 if (target
->stub_tables().size() != 0)
8408 stub_table
= target
->stub_tables()[0];
8410 if (stub_table
!= NULL
)
8412 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8414 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8415 rela
.get_r_addend());
8417 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8418 rela
.get_r_addend());
8421 value
= stub_table
->stub_address() + ent
->off_
;
8422 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8423 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8424 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8427 && relnum
+ 1 < reloc_count
)
8429 Reltype
next_rela(preloc
+ reloc_size
);
8430 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8431 == elfcpp::R_PPC64_TOCSAVE
8432 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8435 localentry0
= ent
->localentry0_
;
8436 has_stub_value
= true;
8440 // We don't care too much about bogus debug references to
8441 // non-local functions, but otherwise there had better be a plt
8442 // call stub or global entry stub as appropriate.
8443 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
8446 if (r_type
== elfcpp::R_POWERPC_GOT16
8447 || r_type
== elfcpp::R_POWERPC_GOT16_LO
8448 || r_type
== elfcpp::R_POWERPC_GOT16_HI
8449 || r_type
== elfcpp::R_POWERPC_GOT16_HA
8450 || r_type
== elfcpp::R_PPC64_GOT16_DS
8451 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
8455 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
8456 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
8460 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
8461 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
8463 value
-= target
->got_section()->got_base_offset(object
);
8465 else if (r_type
== elfcpp::R_PPC64_TOC
)
8467 value
= (target
->got_section()->output_section()->address()
8468 + object
->toc_base_offset());
8470 else if (gsym
!= NULL
8471 && (r_type
== elfcpp::R_POWERPC_REL24
8472 || r_type
== elfcpp::R_PPC_PLTREL24
)
8477 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
8478 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
8479 bool can_plt_call
= localentry0
|| target
->is_tls_get_addr_opt(gsym
);
8480 if (!can_plt_call
&& rela
.get_r_offset() + 8 <= view_size
)
8482 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
8483 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
8486 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
8488 elfcpp::Swap
<32, big_endian
>::
8489 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
8490 can_plt_call
= true;
8495 // If we don't have a branch and link followed by a nop,
8496 // we can't go via the plt because there is no place to
8497 // put a toc restoring instruction.
8498 // Unless we know we won't be returning.
8499 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
8500 can_plt_call
= true;
8504 // g++ as of 20130507 emits self-calls without a
8505 // following nop. This is arguably wrong since we have
8506 // conflicting information. On the one hand a global
8507 // symbol and on the other a local call sequence, but
8508 // don't error for this special case.
8509 // It isn't possible to cheaply verify we have exactly
8510 // such a call. Allow all calls to the same section.
8512 Address code
= value
;
8513 if (gsym
->source() == Symbol::FROM_OBJECT
8514 && gsym
->object() == object
)
8516 unsigned int dest_shndx
= 0;
8517 if (target
->abiversion() < 2)
8519 Address addend
= rela
.get_r_addend();
8520 code
= psymval
->value(object
, addend
);
8521 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8522 &code
, &dest_shndx
);
8525 if (dest_shndx
== 0)
8526 dest_shndx
= gsym
->shndx(&is_ordinary
);
8527 ok
= dest_shndx
== relinfo
->data_shndx
;
8531 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8532 _("call lacks nop, can't restore toc; "
8533 "recompile with -fPIC"));
8539 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8540 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8541 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8542 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8544 // First instruction of a global dynamic sequence, arg setup insn.
8545 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8546 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8547 enum Got_type got_type
= GOT_TYPE_STANDARD
;
8548 if (tls_type
== tls::TLSOPT_NONE
)
8549 got_type
= GOT_TYPE_TLSGD
;
8550 else if (tls_type
== tls::TLSOPT_TO_IE
)
8551 got_type
= GOT_TYPE_TPREL
;
8552 if (got_type
!= GOT_TYPE_STANDARD
)
8556 gold_assert(gsym
->has_got_offset(got_type
));
8557 value
= gsym
->got_offset(got_type
);
8561 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
8562 value
= object
->local_got_offset(r_sym
, got_type
);
8564 value
-= target
->got_section()->got_base_offset(object
);
8566 if (tls_type
== tls::TLSOPT_TO_IE
)
8568 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8569 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8571 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8572 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8573 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
8575 insn
|= 32 << 26; // lwz
8577 insn
|= 58 << 26; // ld
8578 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8580 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8581 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8583 else if (tls_type
== tls::TLSOPT_TO_LE
)
8585 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8586 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8588 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8589 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8590 insn
&= (1 << 26) - (1 << 21); // extract rt
8595 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8596 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8597 value
= psymval
->value(object
, rela
.get_r_addend());
8601 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8603 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8604 r_type
= elfcpp::R_POWERPC_NONE
;
8608 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8609 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8610 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8611 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8613 // First instruction of a local dynamic sequence, arg setup insn.
8614 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8615 if (tls_type
== tls::TLSOPT_NONE
)
8617 value
= target
->tlsld_got_offset();
8618 value
-= target
->got_section()->got_base_offset(object
);
8622 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8623 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8624 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8626 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8627 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8628 insn
&= (1 << 26) - (1 << 21); // extract rt
8633 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8634 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8639 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8641 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8642 r_type
= elfcpp::R_POWERPC_NONE
;
8646 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
8647 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
8648 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
8649 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
8651 // Accesses relative to a local dynamic sequence address,
8652 // no optimisation here.
8655 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
8656 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
8660 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
8661 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
8663 value
-= target
->got_section()->got_base_offset(object
);
8665 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8666 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8667 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8668 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8670 // First instruction of initial exec sequence.
8671 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8672 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8673 if (tls_type
== tls::TLSOPT_NONE
)
8677 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
8678 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
8682 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
8683 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
8685 value
-= target
->got_section()->got_base_offset(object
);
8689 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8690 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8691 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8693 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8694 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8695 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
8700 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8701 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8702 value
= psymval
->value(object
, rela
.get_r_addend());
8706 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8708 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8709 r_type
= elfcpp::R_POWERPC_NONE
;
8713 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8714 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8716 // Second instruction of a global dynamic sequence,
8717 // the __tls_get_addr call
8718 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8719 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8720 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8721 if (tls_type
!= tls::TLSOPT_NONE
)
8723 if (tls_type
== tls::TLSOPT_TO_IE
)
8725 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8726 Insn insn
= add_3_3_13
;
8729 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8730 r_type
= elfcpp::R_POWERPC_NONE
;
8734 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8735 Insn insn
= addi_3_3
;
8736 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8737 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8739 value
= psymval
->value(object
, rela
.get_r_addend());
8741 this->skip_next_tls_get_addr_call();
8744 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8745 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8747 // Second instruction of a local dynamic sequence,
8748 // the __tls_get_addr call
8749 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8750 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8751 if (tls_type
== tls::TLSOPT_TO_LE
)
8753 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8754 Insn insn
= addi_3_3
;
8755 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8756 this->skip_next_tls_get_addr_call();
8757 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8762 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8764 // Second instruction of an initial exec sequence
8765 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8766 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8767 if (tls_type
== tls::TLSOPT_TO_LE
)
8769 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8770 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8771 unsigned int reg
= size
== 32 ? 2 : 13;
8772 insn
= at_tls_transform(insn
, reg
);
8773 gold_assert(insn
!= 0);
8774 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8775 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8777 value
= psymval
->value(object
, rela
.get_r_addend());
8780 else if (!has_stub_value
)
8783 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8784 addend
= rela
.get_r_addend();
8785 value
= psymval
->value(object
, addend
);
8786 if (size
== 64 && is_branch_reloc(r_type
))
8788 if (target
->abiversion() >= 2)
8791 value
+= object
->ppc64_local_entry_offset(gsym
);
8793 value
+= object
->ppc64_local_entry_offset(r_sym
);
8797 unsigned int dest_shndx
;
8798 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8799 &value
, &dest_shndx
);
8802 Address max_branch_offset
= max_branch_delta(r_type
);
8803 if (max_branch_offset
!= 0
8804 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8806 Stub_table
<size
, big_endian
>* stub_table
8807 = object
->stub_table(relinfo
->data_shndx
);
8808 if (stub_table
!= NULL
)
8810 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8811 if (off
!= invalid_address
)
8813 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8815 has_stub_value
= true;
8823 case elfcpp::R_PPC64_REL64
:
8824 case elfcpp::R_POWERPC_REL32
:
8825 case elfcpp::R_POWERPC_REL24
:
8826 case elfcpp::R_PPC_PLTREL24
:
8827 case elfcpp::R_PPC_LOCAL24PC
:
8828 case elfcpp::R_POWERPC_REL16
:
8829 case elfcpp::R_POWERPC_REL16_LO
:
8830 case elfcpp::R_POWERPC_REL16_HI
:
8831 case elfcpp::R_POWERPC_REL16_HA
:
8832 case elfcpp::R_POWERPC_REL16DX_HA
:
8833 case elfcpp::R_POWERPC_REL14
:
8834 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8835 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8839 case elfcpp::R_PPC64_TOC16
:
8840 case elfcpp::R_PPC64_TOC16_LO
:
8841 case elfcpp::R_PPC64_TOC16_HI
:
8842 case elfcpp::R_PPC64_TOC16_HA
:
8843 case elfcpp::R_PPC64_TOC16_DS
:
8844 case elfcpp::R_PPC64_TOC16_LO_DS
:
8845 // Subtract the TOC base address.
8846 value
-= (target
->got_section()->output_section()->address()
8847 + object
->toc_base_offset());
8850 case elfcpp::R_POWERPC_SECTOFF
:
8851 case elfcpp::R_POWERPC_SECTOFF_LO
:
8852 case elfcpp::R_POWERPC_SECTOFF_HI
:
8853 case elfcpp::R_POWERPC_SECTOFF_HA
:
8854 case elfcpp::R_PPC64_SECTOFF_DS
:
8855 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8857 value
-= os
->address();
8860 case elfcpp::R_PPC64_TPREL16_DS
:
8861 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8862 case elfcpp::R_PPC64_TPREL16_HIGH
:
8863 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8865 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8868 case elfcpp::R_POWERPC_TPREL16
:
8869 case elfcpp::R_POWERPC_TPREL16_LO
:
8870 case elfcpp::R_POWERPC_TPREL16_HI
:
8871 case elfcpp::R_POWERPC_TPREL16_HA
:
8872 case elfcpp::R_POWERPC_TPREL
:
8873 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8874 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8875 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8876 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8877 // tls symbol values are relative to tls_segment()->vaddr()
8881 case elfcpp::R_PPC64_DTPREL16_DS
:
8882 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8883 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8884 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8885 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8886 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8888 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8889 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8892 case elfcpp::R_POWERPC_DTPREL16
:
8893 case elfcpp::R_POWERPC_DTPREL16_LO
:
8894 case elfcpp::R_POWERPC_DTPREL16_HI
:
8895 case elfcpp::R_POWERPC_DTPREL16_HA
:
8896 case elfcpp::R_POWERPC_DTPREL
:
8897 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8898 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8899 // tls symbol values are relative to tls_segment()->vaddr()
8900 value
-= dtp_offset
;
8903 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8905 value
+= object
->ppc64_local_entry_offset(gsym
);
8907 value
+= object
->ppc64_local_entry_offset(r_sym
);
8914 Insn branch_bit
= 0;
8917 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8918 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8919 branch_bit
= 1 << 21;
8921 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8922 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8924 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8925 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8928 if (this->is_isa_v2
)
8930 // Set 'a' bit. This is 0b00010 in BO field for branch
8931 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8932 // for branch on CTR insns (BO == 1a00t or 1a01t).
8933 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8935 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8942 // Invert 'y' bit if not the default.
8943 if (static_cast<Signed_address
>(value
) < 0)
8946 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8961 // Multi-instruction sequences that access the GOT/TOC can
8962 // be optimized, eg.
8963 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8964 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8966 // addis ra,r2,0; addi rb,ra,x@toc@l;
8967 // to nop; addi rb,r2,x@toc;
8968 // FIXME: the @got sequence shown above is not yet
8969 // optimized. Note that gcc as of 2017-01-07 doesn't use
8970 // the ELF @got relocs except for TLS, instead using the
8971 // PowerOpen variant of a compiler managed GOT (called TOC).
8972 // The PowerOpen TOC sequence equivalent to the first
8973 // example is optimized.
8974 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8975 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8976 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8977 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8978 case elfcpp::R_POWERPC_GOT16_HA
:
8979 case elfcpp::R_PPC64_TOC16_HA
:
8980 if (parameters
->options().toc_optimize())
8982 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8983 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8984 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8985 && object
->make_toc_relative(target
, &value
))
8987 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8988 == ((15u << 26) | (2 << 16)));
8990 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8991 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8992 && value
+ 0x8000 < 0x10000)
8994 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9000 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9001 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9002 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9003 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9004 case elfcpp::R_POWERPC_GOT16_LO
:
9005 case elfcpp::R_PPC64_GOT16_LO_DS
:
9006 case elfcpp::R_PPC64_TOC16_LO
:
9007 case elfcpp::R_PPC64_TOC16_LO_DS
:
9008 if (parameters
->options().toc_optimize())
9010 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9011 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9012 bool changed
= false;
9013 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
9014 && object
->make_toc_relative(target
, &value
))
9016 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
9017 insn
^= (14u << 26) ^ (58u << 26);
9018 r_type
= elfcpp::R_PPC64_TOC16_LO
;
9021 if (ok_lo_toc_insn(insn
, r_type
)
9022 && value
+ 0x8000 < 0x10000)
9024 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
9026 // Transform addic to addi when we change reg.
9027 insn
&= ~((0x3f << 26) | (0x1f << 16));
9028 insn
|= (14u << 26) | (2 << 16);
9032 insn
&= ~(0x1f << 16);
9038 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9042 case elfcpp::R_POWERPC_TPREL16_HA
:
9043 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9045 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9046 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9047 if ((insn
& ((0x3f << 26) | 0x1f << 16))
9048 != ((15u << 26) | ((size
== 32 ? 2 : 13) << 16)))
9052 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9058 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9060 // R_PPC_TLSGD, R_PPC_TLSLD
9063 case elfcpp::R_POWERPC_TPREL16_LO
:
9064 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9066 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9067 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9068 insn
&= ~(0x1f << 16);
9069 insn
|= (size
== 32 ? 2 : 13) << 16;
9070 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9074 case elfcpp::R_PPC64_ENTRY
:
9075 value
= (target
->got_section()->output_section()->address()
9076 + object
->toc_base_offset());
9077 if (value
+ 0x80008000 <= 0xffffffff
9078 && !parameters
->options().output_is_position_independent())
9080 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9081 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9082 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9084 if ((insn1
& ~0xfffc) == ld_2_12
9085 && insn2
== add_2_2_12
)
9087 insn1
= lis_2
+ ha(value
);
9088 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9089 insn2
= addi_2_2
+ l(value
);
9090 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9097 if (value
+ 0x80008000 <= 0xffffffff)
9099 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9100 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9101 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9103 if ((insn1
& ~0xfffc) == ld_2_12
9104 && insn2
== add_2_2_12
)
9106 insn1
= addis_2_12
+ ha(value
);
9107 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9108 insn2
= addi_2_2
+ l(value
);
9109 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9116 case elfcpp::R_POWERPC_REL16_LO
:
9117 // If we are generating a non-PIC executable, edit
9118 // 0: addis 2,12,.TOC.-0b@ha
9119 // addi 2,2,.TOC.-0b@l
9120 // used by ELFv2 global entry points to set up r2, to
9123 // if .TOC. is in range. */
9124 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
9127 && target
->abiversion() >= 2
9128 && !parameters
->options().output_is_position_independent()
9129 && rela
.get_r_addend() == d_offset
+ 4
9131 && strcmp(gsym
->name(), ".TOC.") == 0)
9133 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9134 Reltype
prev_rela(preloc
- reloc_size
);
9135 if ((prev_rela
.get_r_info()
9136 == elfcpp::elf_r_info
<size
>(r_sym
,
9137 elfcpp::R_POWERPC_REL16_HA
))
9138 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
9139 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
9141 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9142 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
9143 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9145 if ((insn1
& 0xffff0000) == addis_2_12
9146 && (insn2
& 0xffff0000) == addi_2_2
)
9148 insn1
= lis_2
+ ha(value
+ address
- 4);
9149 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
9150 insn2
= addi_2_2
+ l(value
+ address
- 4);
9151 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
9154 relinfo
->rr
->set_strategy(relnum
- 1,
9155 Relocatable_relocs::RELOC_SPECIAL
);
9156 relinfo
->rr
->set_strategy(relnum
,
9157 Relocatable_relocs::RELOC_SPECIAL
);
9167 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
9168 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
9171 case elfcpp::R_POWERPC_ADDR32
:
9172 case elfcpp::R_POWERPC_UADDR32
:
9174 overflow
= Reloc::CHECK_BITFIELD
;
9177 case elfcpp::R_POWERPC_REL32
:
9178 case elfcpp::R_POWERPC_REL16DX_HA
:
9180 overflow
= Reloc::CHECK_SIGNED
;
9183 case elfcpp::R_POWERPC_UADDR16
:
9184 overflow
= Reloc::CHECK_BITFIELD
;
9187 case elfcpp::R_POWERPC_ADDR16
:
9188 // We really should have three separate relocations,
9189 // one for 16-bit data, one for insns with 16-bit signed fields,
9190 // and one for insns with 16-bit unsigned fields.
9191 overflow
= Reloc::CHECK_BITFIELD
;
9192 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
9193 overflow
= Reloc::CHECK_LOW_INSN
;
9196 case elfcpp::R_POWERPC_ADDR16_HI
:
9197 case elfcpp::R_POWERPC_ADDR16_HA
:
9198 case elfcpp::R_POWERPC_GOT16_HI
:
9199 case elfcpp::R_POWERPC_GOT16_HA
:
9200 case elfcpp::R_POWERPC_PLT16_HI
:
9201 case elfcpp::R_POWERPC_PLT16_HA
:
9202 case elfcpp::R_POWERPC_SECTOFF_HI
:
9203 case elfcpp::R_POWERPC_SECTOFF_HA
:
9204 case elfcpp::R_PPC64_TOC16_HI
:
9205 case elfcpp::R_PPC64_TOC16_HA
:
9206 case elfcpp::R_PPC64_PLTGOT16_HI
:
9207 case elfcpp::R_PPC64_PLTGOT16_HA
:
9208 case elfcpp::R_POWERPC_TPREL16_HI
:
9209 case elfcpp::R_POWERPC_TPREL16_HA
:
9210 case elfcpp::R_POWERPC_DTPREL16_HI
:
9211 case elfcpp::R_POWERPC_DTPREL16_HA
:
9212 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9213 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9214 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9215 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9216 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9217 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9218 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9219 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9220 case elfcpp::R_POWERPC_REL16_HI
:
9221 case elfcpp::R_POWERPC_REL16_HA
:
9223 overflow
= Reloc::CHECK_HIGH_INSN
;
9226 case elfcpp::R_POWERPC_REL16
:
9227 case elfcpp::R_PPC64_TOC16
:
9228 case elfcpp::R_POWERPC_GOT16
:
9229 case elfcpp::R_POWERPC_SECTOFF
:
9230 case elfcpp::R_POWERPC_TPREL16
:
9231 case elfcpp::R_POWERPC_DTPREL16
:
9232 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9233 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9234 case elfcpp::R_POWERPC_GOT_TPREL16
:
9235 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9236 overflow
= Reloc::CHECK_LOW_INSN
;
9239 case elfcpp::R_POWERPC_ADDR24
:
9240 case elfcpp::R_POWERPC_ADDR14
:
9241 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9242 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9243 case elfcpp::R_PPC64_ADDR16_DS
:
9244 case elfcpp::R_POWERPC_REL24
:
9245 case elfcpp::R_PPC_PLTREL24
:
9246 case elfcpp::R_PPC_LOCAL24PC
:
9247 case elfcpp::R_PPC64_TPREL16_DS
:
9248 case elfcpp::R_PPC64_DTPREL16_DS
:
9249 case elfcpp::R_PPC64_TOC16_DS
:
9250 case elfcpp::R_PPC64_GOT16_DS
:
9251 case elfcpp::R_PPC64_SECTOFF_DS
:
9252 case elfcpp::R_POWERPC_REL14
:
9253 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9254 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9255 overflow
= Reloc::CHECK_SIGNED
;
9259 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9262 if (overflow
== Reloc::CHECK_LOW_INSN
9263 || overflow
== Reloc::CHECK_HIGH_INSN
)
9265 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9267 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
9268 overflow
= Reloc::CHECK_BITFIELD
;
9269 else if (overflow
== Reloc::CHECK_LOW_INSN
9270 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
9271 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
9272 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
9273 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
9274 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
9275 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
9276 overflow
= Reloc::CHECK_UNSIGNED
;
9278 overflow
= Reloc::CHECK_SIGNED
;
9281 bool maybe_dq_reloc
= false;
9282 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
9283 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
9286 case elfcpp::R_POWERPC_NONE
:
9287 case elfcpp::R_POWERPC_TLS
:
9288 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
9289 case elfcpp::R_POWERPC_GNU_VTENTRY
:
9292 case elfcpp::R_PPC64_ADDR64
:
9293 case elfcpp::R_PPC64_REL64
:
9294 case elfcpp::R_PPC64_TOC
:
9295 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9296 Reloc::addr64(view
, value
);
9299 case elfcpp::R_POWERPC_TPREL
:
9300 case elfcpp::R_POWERPC_DTPREL
:
9302 Reloc::addr64(view
, value
);
9304 status
= Reloc::addr32(view
, value
, overflow
);
9307 case elfcpp::R_PPC64_UADDR64
:
9308 Reloc::addr64_u(view
, value
);
9311 case elfcpp::R_POWERPC_ADDR32
:
9312 status
= Reloc::addr32(view
, value
, overflow
);
9315 case elfcpp::R_POWERPC_REL32
:
9316 case elfcpp::R_POWERPC_UADDR32
:
9317 status
= Reloc::addr32_u(view
, value
, overflow
);
9320 case elfcpp::R_POWERPC_ADDR24
:
9321 case elfcpp::R_POWERPC_REL24
:
9322 case elfcpp::R_PPC_PLTREL24
:
9323 case elfcpp::R_PPC_LOCAL24PC
:
9324 status
= Reloc::addr24(view
, value
, overflow
);
9327 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9328 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9329 case elfcpp::R_POWERPC_GOT_TPREL16
:
9330 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9333 // On ppc64 these are all ds form
9334 maybe_dq_reloc
= true;
9338 case elfcpp::R_POWERPC_ADDR16
:
9339 case elfcpp::R_POWERPC_REL16
:
9340 case elfcpp::R_PPC64_TOC16
:
9341 case elfcpp::R_POWERPC_GOT16
:
9342 case elfcpp::R_POWERPC_SECTOFF
:
9343 case elfcpp::R_POWERPC_TPREL16
:
9344 case elfcpp::R_POWERPC_DTPREL16
:
9345 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9346 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9347 case elfcpp::R_POWERPC_ADDR16_LO
:
9348 case elfcpp::R_POWERPC_REL16_LO
:
9349 case elfcpp::R_PPC64_TOC16_LO
:
9350 case elfcpp::R_POWERPC_GOT16_LO
:
9351 case elfcpp::R_POWERPC_SECTOFF_LO
:
9352 case elfcpp::R_POWERPC_TPREL16_LO
:
9353 case elfcpp::R_POWERPC_DTPREL16_LO
:
9354 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9355 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9357 status
= Reloc::addr16(view
, value
, overflow
);
9359 maybe_dq_reloc
= true;
9362 case elfcpp::R_POWERPC_UADDR16
:
9363 status
= Reloc::addr16_u(view
, value
, overflow
);
9366 case elfcpp::R_PPC64_ADDR16_HIGH
:
9367 case elfcpp::R_PPC64_TPREL16_HIGH
:
9368 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9370 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
9373 case elfcpp::R_POWERPC_ADDR16_HI
:
9374 case elfcpp::R_POWERPC_REL16_HI
:
9375 case elfcpp::R_PPC64_TOC16_HI
:
9376 case elfcpp::R_POWERPC_GOT16_HI
:
9377 case elfcpp::R_POWERPC_SECTOFF_HI
:
9378 case elfcpp::R_POWERPC_TPREL16_HI
:
9379 case elfcpp::R_POWERPC_DTPREL16_HI
:
9380 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9381 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9382 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9383 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9384 Reloc::addr16_hi(view
, value
);
9387 case elfcpp::R_PPC64_ADDR16_HIGHA
:
9388 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9389 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9391 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
9394 case elfcpp::R_POWERPC_ADDR16_HA
:
9395 case elfcpp::R_POWERPC_REL16_HA
:
9396 case elfcpp::R_PPC64_TOC16_HA
:
9397 case elfcpp::R_POWERPC_GOT16_HA
:
9398 case elfcpp::R_POWERPC_SECTOFF_HA
:
9399 case elfcpp::R_POWERPC_TPREL16_HA
:
9400 case elfcpp::R_POWERPC_DTPREL16_HA
:
9401 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9402 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9403 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9404 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9405 Reloc::addr16_ha(view
, value
);
9408 case elfcpp::R_POWERPC_REL16DX_HA
:
9409 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
9412 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9414 // R_PPC_EMB_NADDR16_LO
9417 case elfcpp::R_PPC64_ADDR16_HIGHER
:
9418 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9419 Reloc::addr16_hi2(view
, value
);
9422 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9424 // R_PPC_EMB_NADDR16_HI
9427 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
9428 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9429 Reloc::addr16_ha2(view
, value
);
9432 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9434 // R_PPC_EMB_NADDR16_HA
9437 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
9438 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9439 Reloc::addr16_hi3(view
, value
);
9442 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9447 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
9448 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9449 Reloc::addr16_ha3(view
, value
);
9452 case elfcpp::R_PPC64_DTPREL16_DS
:
9453 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9455 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9458 case elfcpp::R_PPC64_TPREL16_DS
:
9459 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9461 // R_PPC_TLSGD, R_PPC_TLSLD
9464 case elfcpp::R_PPC64_ADDR16_DS
:
9465 case elfcpp::R_PPC64_ADDR16_LO_DS
:
9466 case elfcpp::R_PPC64_TOC16_DS
:
9467 case elfcpp::R_PPC64_TOC16_LO_DS
:
9468 case elfcpp::R_PPC64_GOT16_DS
:
9469 case elfcpp::R_PPC64_GOT16_LO_DS
:
9470 case elfcpp::R_PPC64_SECTOFF_DS
:
9471 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9472 maybe_dq_reloc
= true;
9475 case elfcpp::R_POWERPC_ADDR14
:
9476 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9477 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9478 case elfcpp::R_POWERPC_REL14
:
9479 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9480 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9481 status
= Reloc::addr14(view
, value
, overflow
);
9484 case elfcpp::R_POWERPC_COPY
:
9485 case elfcpp::R_POWERPC_GLOB_DAT
:
9486 case elfcpp::R_POWERPC_JMP_SLOT
:
9487 case elfcpp::R_POWERPC_RELATIVE
:
9488 case elfcpp::R_POWERPC_DTPMOD
:
9489 case elfcpp::R_PPC64_JMP_IREL
:
9490 case elfcpp::R_POWERPC_IRELATIVE
:
9491 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9492 _("unexpected reloc %u in object file"),
9496 case elfcpp::R_PPC64_TOCSAVE
:
9502 Symbol_location loc
;
9503 loc
.object
= relinfo
->object
;
9504 loc
.shndx
= relinfo
->data_shndx
;
9505 loc
.offset
= rela
.get_r_offset();
9506 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
9507 if (p
!= target
->tocsave_loc().end())
9509 // If we've generated plt calls using this tocsave, then
9510 // the nop needs to be changed to save r2.
9511 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9512 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
9513 elfcpp::Swap
<32, big_endian
>::
9514 writeval(iview
, std_2_1
+ target
->stk_toc());
9519 case elfcpp::R_PPC_EMB_SDA2I16
:
9520 case elfcpp::R_PPC_EMB_SDA2REL
:
9523 // R_PPC64_TLSGD, R_PPC64_TLSLD
9526 case elfcpp::R_POWERPC_PLT32
:
9527 case elfcpp::R_POWERPC_PLTREL32
:
9528 case elfcpp::R_POWERPC_PLT16_LO
:
9529 case elfcpp::R_POWERPC_PLT16_HI
:
9530 case elfcpp::R_POWERPC_PLT16_HA
:
9531 case elfcpp::R_PPC_SDAREL16
:
9532 case elfcpp::R_POWERPC_ADDR30
:
9533 case elfcpp::R_PPC64_PLT64
:
9534 case elfcpp::R_PPC64_PLTREL64
:
9535 case elfcpp::R_PPC64_PLTGOT16
:
9536 case elfcpp::R_PPC64_PLTGOT16_LO
:
9537 case elfcpp::R_PPC64_PLTGOT16_HI
:
9538 case elfcpp::R_PPC64_PLTGOT16_HA
:
9539 case elfcpp::R_PPC64_PLT16_LO_DS
:
9540 case elfcpp::R_PPC64_PLTGOT16_DS
:
9541 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
9542 case elfcpp::R_PPC_EMB_RELSDA
:
9543 case elfcpp::R_PPC_TOC16
:
9546 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9547 _("unsupported reloc %u"),
9555 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9557 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
9558 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9559 && (insn
& 3) == 1))
9560 status
= Reloc::addr16_dq(view
, value
, overflow
);
9562 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9563 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9564 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
9565 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
9566 status
= Reloc::addr16_ds(view
, value
, overflow
);
9568 status
= Reloc::addr16(view
, value
, overflow
);
9571 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
9574 && gsym
->is_undefined()
9575 && is_branch_reloc(r_type
))))
9577 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9578 _("relocation overflow"));
9580 gold_info(_("try relinking with a smaller --stub-group-size"));
9586 // Relocate section data.
9588 template<int size
, bool big_endian
>
9590 Target_powerpc
<size
, big_endian
>::relocate_section(
9591 const Relocate_info
<size
, big_endian
>* relinfo
,
9592 unsigned int sh_type
,
9593 const unsigned char* prelocs
,
9595 Output_section
* output_section
,
9596 bool needs_special_offset_handling
,
9597 unsigned char* view
,
9599 section_size_type view_size
,
9600 const Reloc_symbol_changes
* reloc_symbol_changes
)
9602 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
9603 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
9604 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
9605 Powerpc_comdat_behavior
;
9606 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9609 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9611 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
9612 Powerpc_comdat_behavior
, Classify_reloc
>(
9618 needs_special_offset_handling
,
9622 reloc_symbol_changes
);
9625 template<int size
, bool big_endian
>
9626 class Powerpc_scan_relocatable_reloc
9629 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9630 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9631 static const int sh_type
= elfcpp::SHT_RELA
;
9633 // Return the symbol referred to by the relocation.
9634 static inline unsigned int
9635 get_r_sym(const Reltype
* reloc
)
9636 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
9638 // Return the type of the relocation.
9639 static inline unsigned int
9640 get_r_type(const Reltype
* reloc
)
9641 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
9643 // Return the strategy to use for a local symbol which is not a
9644 // section symbol, given the relocation type.
9645 inline Relocatable_relocs::Reloc_strategy
9646 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
9648 if (r_type
== 0 && r_sym
== 0)
9649 return Relocatable_relocs::RELOC_DISCARD
;
9650 return Relocatable_relocs::RELOC_COPY
;
9653 // Return the strategy to use for a local symbol which is a section
9654 // symbol, given the relocation type.
9655 inline Relocatable_relocs::Reloc_strategy
9656 local_section_strategy(unsigned int, Relobj
*)
9658 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
9661 // Return the strategy to use for a global symbol, given the
9662 // relocation type, the object, and the symbol index.
9663 inline Relocatable_relocs::Reloc_strategy
9664 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
9666 if (r_type
== elfcpp::R_PPC_PLTREL24
)
9667 return Relocatable_relocs::RELOC_SPECIAL
;
9668 return Relocatable_relocs::RELOC_COPY
;
9672 // Scan the relocs during a relocatable link.
9674 template<int size
, bool big_endian
>
9676 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
9677 Symbol_table
* symtab
,
9679 Sized_relobj_file
<size
, big_endian
>* object
,
9680 unsigned int data_shndx
,
9681 unsigned int sh_type
,
9682 const unsigned char* prelocs
,
9684 Output_section
* output_section
,
9685 bool needs_special_offset_handling
,
9686 size_t local_symbol_count
,
9687 const unsigned char* plocal_symbols
,
9688 Relocatable_relocs
* rr
)
9690 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
9692 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9694 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
9702 needs_special_offset_handling
,
9708 // Scan the relocs for --emit-relocs.
9710 template<int size
, bool big_endian
>
9712 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
9713 Symbol_table
* symtab
,
9715 Sized_relobj_file
<size
, big_endian
>* object
,
9716 unsigned int data_shndx
,
9717 unsigned int sh_type
,
9718 const unsigned char* prelocs
,
9720 Output_section
* output_section
,
9721 bool needs_special_offset_handling
,
9722 size_t local_symbol_count
,
9723 const unsigned char* plocal_syms
,
9724 Relocatable_relocs
* rr
)
9726 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9728 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
9729 Emit_relocs_strategy
;
9731 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9733 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
9741 needs_special_offset_handling
,
9747 // Emit relocations for a section.
9748 // This is a modified version of the function by the same name in
9749 // target-reloc.h. Using relocate_special_relocatable for
9750 // R_PPC_PLTREL24 would require duplication of the entire body of the
9751 // loop, so we may as well duplicate the whole thing.
9753 template<int size
, bool big_endian
>
9755 Target_powerpc
<size
, big_endian
>::relocate_relocs(
9756 const Relocate_info
<size
, big_endian
>* relinfo
,
9757 unsigned int sh_type
,
9758 const unsigned char* prelocs
,
9760 Output_section
* output_section
,
9761 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
9763 Address view_address
,
9765 unsigned char* reloc_view
,
9766 section_size_type reloc_view_size
)
9768 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9770 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9771 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
9772 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9773 // Offset from start of insn to d-field reloc.
9774 const int d_offset
= big_endian
? 2 : 0;
9776 Powerpc_relobj
<size
, big_endian
>* const object
9777 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
9778 const unsigned int local_count
= object
->local_symbol_count();
9779 unsigned int got2_shndx
= object
->got2_shndx();
9780 Address got2_addend
= 0;
9781 if (got2_shndx
!= 0)
9783 got2_addend
= object
->get_output_section_offset(got2_shndx
);
9784 gold_assert(got2_addend
!= invalid_address
);
9787 const bool relocatable
= parameters
->options().relocatable();
9789 unsigned char* pwrite
= reloc_view
;
9790 bool zap_next
= false;
9791 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
9793 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
9794 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
9797 Reltype
reloc(prelocs
);
9798 Reltype_write
reloc_write(pwrite
);
9800 Address offset
= reloc
.get_r_offset();
9801 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
9802 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
9803 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
9804 const unsigned int orig_r_sym
= r_sym
;
9805 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
9806 = reloc
.get_r_addend();
9807 const Symbol
* gsym
= NULL
;
9811 // We could arrange to discard these and other relocs for
9812 // tls optimised sequences in the strategy methods, but for
9813 // now do as BFD ld does.
9814 r_type
= elfcpp::R_POWERPC_NONE
;
9818 // Get the new symbol index.
9819 Output_section
* os
= NULL
;
9820 if (r_sym
< local_count
)
9824 case Relocatable_relocs::RELOC_COPY
:
9825 case Relocatable_relocs::RELOC_SPECIAL
:
9828 r_sym
= object
->symtab_index(r_sym
);
9829 gold_assert(r_sym
!= -1U);
9833 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9835 // We are adjusting a section symbol. We need to find
9836 // the symbol table index of the section symbol for
9837 // the output section corresponding to input section
9838 // in which this symbol is defined.
9839 gold_assert(r_sym
< local_count
);
9841 unsigned int shndx
=
9842 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9843 gold_assert(is_ordinary
);
9844 os
= object
->output_section(shndx
);
9845 gold_assert(os
!= NULL
);
9846 gold_assert(os
->needs_symtab_index());
9847 r_sym
= os
->symtab_index();
9857 gsym
= object
->global_symbol(r_sym
);
9858 gold_assert(gsym
!= NULL
);
9859 if (gsym
->is_forwarder())
9860 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9862 gold_assert(gsym
->has_symtab_index());
9863 r_sym
= gsym
->symtab_index();
9866 // Get the new offset--the location in the output section where
9867 // this relocation should be applied.
9868 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9869 offset
+= offset_in_output_section
;
9872 section_offset_type sot_offset
=
9873 convert_types
<section_offset_type
, Address
>(offset
);
9874 section_offset_type new_sot_offset
=
9875 output_section
->output_offset(object
, relinfo
->data_shndx
,
9877 gold_assert(new_sot_offset
!= -1);
9878 offset
= new_sot_offset
;
9881 // In an object file, r_offset is an offset within the section.
9882 // In an executable or dynamic object, generated by
9883 // --emit-relocs, r_offset is an absolute address.
9886 offset
+= view_address
;
9887 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9888 offset
-= offset_in_output_section
;
9891 // Handle the reloc addend based on the strategy.
9892 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9894 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9896 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9897 addend
= psymval
->value(object
, addend
);
9898 // In a relocatable link, the symbol value is relative to
9899 // the start of the output section. For a non-relocatable
9900 // link, we need to adjust the addend.
9903 gold_assert(os
!= NULL
);
9904 addend
-= os
->address();
9907 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9911 if (addend
>= 32768)
9912 addend
+= got2_addend
;
9914 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9916 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9919 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9921 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9922 addend
-= d_offset
+ 4;
9930 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9931 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9932 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9933 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9935 // First instruction of a global dynamic sequence,
9937 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9938 switch (this->optimize_tls_gd(final
))
9940 case tls::TLSOPT_TO_IE
:
9941 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9942 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9944 case tls::TLSOPT_TO_LE
:
9945 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9946 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9947 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9950 r_type
= elfcpp::R_POWERPC_NONE
;
9958 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9959 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9960 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9961 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9963 // First instruction of a local dynamic sequence,
9965 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9967 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9968 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9970 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9971 const Output_section
* os
= relinfo
->layout
->tls_segment()
9973 gold_assert(os
!= NULL
);
9974 gold_assert(os
->needs_symtab_index());
9975 r_sym
= os
->symtab_index();
9976 addend
= dtp_offset
;
9980 r_type
= elfcpp::R_POWERPC_NONE
;
9985 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9986 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9987 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9988 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9990 // First instruction of initial exec sequence.
9991 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9992 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9994 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9995 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9996 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9999 r_type
= elfcpp::R_POWERPC_NONE
;
10000 offset
-= d_offset
;
10004 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
10005 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
10007 // Second instruction of a global dynamic sequence,
10008 // the __tls_get_addr call
10009 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10010 switch (this->optimize_tls_gd(final
))
10012 case tls::TLSOPT_TO_IE
:
10013 r_type
= elfcpp::R_POWERPC_NONE
;
10016 case tls::TLSOPT_TO_LE
:
10017 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10018 offset
+= d_offset
;
10025 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
10026 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
10028 // Second instruction of a local dynamic sequence,
10029 // the __tls_get_addr call
10030 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10032 const Output_section
* os
= relinfo
->layout
->tls_segment()
10034 gold_assert(os
!= NULL
);
10035 gold_assert(os
->needs_symtab_index());
10036 r_sym
= os
->symtab_index();
10037 addend
= dtp_offset
;
10038 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10039 offset
+= d_offset
;
10043 else if (r_type
== elfcpp::R_POWERPC_TLS
)
10045 // Second instruction of an initial exec sequence
10046 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10047 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10049 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10050 offset
+= d_offset
;
10055 reloc_write
.put_r_offset(offset
);
10056 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
10057 reloc_write
.put_r_addend(addend
);
10059 pwrite
+= reloc_size
;
10062 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
10063 == reloc_view_size
);
10066 // Return the value to use for a dynamic symbol which requires special
10067 // treatment. This is how we support equality comparisons of function
10068 // pointers across shared library boundaries, as described in the
10069 // processor specific ABI supplement.
10071 template<int size
, bool big_endian
>
10073 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
10077 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
10078 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10079 p
!= this->stub_tables_
.end();
10082 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10083 = (*p
)->find_plt_call_entry(gsym
);
10085 return (*p
)->stub_address() + ent
->off_
;
10088 else if (this->abiversion() >= 2)
10090 Address off
= this->glink_section()->find_global_entry(gsym
);
10091 if (off
!= invalid_address
)
10092 return this->glink_section()->global_entry_address() + off
;
10094 gold_unreachable();
10097 // Return the PLT address to use for a local symbol.
10098 template<int size
, bool big_endian
>
10100 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
10101 const Relobj
* object
,
10102 unsigned int symndx
) const
10106 const Sized_relobj
<size
, big_endian
>* relobj
10107 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
10108 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10109 p
!= this->stub_tables_
.end();
10112 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10113 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
10115 return (*p
)->stub_address() + ent
->off_
;
10118 gold_unreachable();
10121 // Return the PLT address to use for a global symbol.
10122 template<int size
, bool big_endian
>
10124 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
10125 const Symbol
* gsym
) const
10129 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10130 p
!= this->stub_tables_
.end();
10133 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10134 = (*p
)->find_plt_call_entry(gsym
);
10136 return (*p
)->stub_address() + ent
->off_
;
10139 else if (this->abiversion() >= 2)
10141 Address off
= this->glink_section()->find_global_entry(gsym
);
10142 if (off
!= invalid_address
)
10143 return this->glink_section()->global_entry_address() + off
;
10145 gold_unreachable();
10148 // Return the offset to use for the GOT_INDX'th got entry which is
10149 // for a local tls symbol specified by OBJECT, SYMNDX.
10150 template<int size
, bool big_endian
>
10152 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
10153 const Relobj
* object
,
10154 unsigned int symndx
,
10155 unsigned int got_indx
) const
10157 const Powerpc_relobj
<size
, big_endian
>* ppc_object
10158 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
10159 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
10161 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10162 got_type
<= GOT_TYPE_TPREL
;
10163 got_type
= Got_type(got_type
+ 1))
10164 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
10166 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
10167 if (got_type
== GOT_TYPE_TLSGD
)
10169 if (off
== got_indx
* (size
/ 8))
10171 if (got_type
== GOT_TYPE_TPREL
)
10174 return -dtp_offset
;
10178 gold_unreachable();
10181 // Return the offset to use for the GOT_INDX'th got entry which is
10182 // for global tls symbol GSYM.
10183 template<int size
, bool big_endian
>
10185 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
10187 unsigned int got_indx
) const
10189 if (gsym
->type() == elfcpp::STT_TLS
)
10191 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10192 got_type
<= GOT_TYPE_TPREL
;
10193 got_type
= Got_type(got_type
+ 1))
10194 if (gsym
->has_got_offset(got_type
))
10196 unsigned int off
= gsym
->got_offset(got_type
);
10197 if (got_type
== GOT_TYPE_TLSGD
)
10199 if (off
== got_indx
* (size
/ 8))
10201 if (got_type
== GOT_TYPE_TPREL
)
10204 return -dtp_offset
;
10208 gold_unreachable();
10211 // The selector for powerpc object files.
10213 template<int size
, bool big_endian
>
10214 class Target_selector_powerpc
: public Target_selector
10217 Target_selector_powerpc()
10218 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
10221 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
10222 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
10224 ? (big_endian
? "elf64ppc" : "elf64lppc")
10225 : (big_endian
? "elf32ppc" : "elf32lppc")))
10229 do_instantiate_target()
10230 { return new Target_powerpc
<size
, big_endian
>(); }
10233 Target_selector_powerpc
<32, true> target_selector_ppc32
;
10234 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
10235 Target_selector_powerpc
<64, true> target_selector_ppc64
;
10236 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
10238 // Instantiate these constants for -O0
10239 template<int size
, bool big_endian
>
10240 const typename Output_data_glink
<size
, big_endian
>::Address
10241 Output_data_glink
<size
, big_endian
>::invalid_address
;
10242 template<int size
, bool big_endian
>
10243 const typename Stub_table
<size
, big_endian
>::Address
10244 Stub_table
<size
, big_endian
>::invalid_address
;
10245 template<int size
, bool big_endian
>
10246 const typename Target_powerpc
<size
, big_endian
>::Address
10247 Target_powerpc
<size
, big_endian
>::invalid_address
;
10249 } // End anonymous namespace.