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
1631 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1634 false, // is_big_endian
1635 elfcpp::EM_PPC
, // machine_code
1636 false, // has_make_symbol
1637 false, // has_resolve
1638 false, // has_code_fill
1639 true, // is_default_stack_executable
1640 false, // can_icf_inline_merge_sections
1642 "/usr/lib/ld.so.1", // dynamic_linker
1643 0x10000000, // default_text_segment_address
1644 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1645 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1646 false, // isolate_execinstr
1648 elfcpp::SHN_UNDEF
, // small_common_shndx
1649 elfcpp::SHN_UNDEF
, // large_common_shndx
1650 0, // small_common_section_flags
1651 0, // large_common_section_flags
1652 NULL
, // attributes_section
1653 NULL
, // attributes_vendor
1654 "_start", // entry_symbol_name
1655 32, // hash_entry_size
1659 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1662 true, // is_big_endian
1663 elfcpp::EM_PPC64
, // machine_code
1664 false, // has_make_symbol
1665 true, // has_resolve
1666 false, // has_code_fill
1667 false, // is_default_stack_executable
1668 false, // can_icf_inline_merge_sections
1670 "/usr/lib/ld.so.1", // dynamic_linker
1671 0x10000000, // default_text_segment_address
1672 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1673 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1674 false, // isolate_execinstr
1676 elfcpp::SHN_UNDEF
, // small_common_shndx
1677 elfcpp::SHN_UNDEF
, // large_common_shndx
1678 0, // small_common_section_flags
1679 0, // large_common_section_flags
1680 NULL
, // attributes_section
1681 NULL
, // attributes_vendor
1682 "_start", // entry_symbol_name
1683 32, // hash_entry_size
1687 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1690 false, // is_big_endian
1691 elfcpp::EM_PPC64
, // machine_code
1692 false, // has_make_symbol
1693 true, // has_resolve
1694 false, // has_code_fill
1695 false, // is_default_stack_executable
1696 false, // can_icf_inline_merge_sections
1698 "/usr/lib/ld.so.1", // dynamic_linker
1699 0x10000000, // default_text_segment_address
1700 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1701 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1702 false, // isolate_execinstr
1704 elfcpp::SHN_UNDEF
, // small_common_shndx
1705 elfcpp::SHN_UNDEF
, // large_common_shndx
1706 0, // small_common_section_flags
1707 0, // large_common_section_flags
1708 NULL
, // attributes_section
1709 NULL
, // attributes_vendor
1710 "_start", // entry_symbol_name
1711 32, // hash_entry_size
1715 is_branch_reloc(unsigned int r_type
)
1717 return (r_type
== elfcpp::R_POWERPC_REL24
1718 || r_type
== elfcpp::R_PPC_PLTREL24
1719 || r_type
== elfcpp::R_PPC_LOCAL24PC
1720 || r_type
== elfcpp::R_POWERPC_REL14
1721 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1722 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1723 || r_type
== elfcpp::R_POWERPC_ADDR24
1724 || r_type
== elfcpp::R_POWERPC_ADDR14
1725 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1726 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1729 // If INSN is an opcode that may be used with an @tls operand, return
1730 // the transformed insn for TLS optimisation, otherwise return 0. If
1731 // REG is non-zero only match an insn with RB or RA equal to REG.
1733 at_tls_transform(uint32_t insn
, unsigned int reg
)
1735 if ((insn
& (0x3f << 26)) != 31 << 26)
1739 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1740 rtra
= insn
& ((1 << 26) - (1 << 16));
1741 else if (((insn
>> 16) & 0x1f) == reg
)
1742 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1746 if ((insn
& (0x3ff << 1)) == 266 << 1)
1749 else if ((insn
& (0x1f << 1)) == 23 << 1
1750 && ((insn
& (0x1f << 6)) < 14 << 6
1751 || ((insn
& (0x1f << 6)) >= 16 << 6
1752 && (insn
& (0x1f << 6)) < 24 << 6)))
1753 // load and store indexed -> dform
1754 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1755 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1756 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1757 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1758 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1760 insn
= (58 << 26) | 2;
1768 template<int size
, bool big_endian
>
1769 class Powerpc_relocate_functions
1789 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1790 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1791 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword SignedAddress
;
1793 template<int valsize
>
1795 has_overflow_signed(Address value
)
1797 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1798 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1799 limit
<<= ((valsize
- 1) >> 1);
1800 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1801 return value
+ limit
> (limit
<< 1) - 1;
1804 template<int valsize
>
1806 has_overflow_unsigned(Address value
)
1808 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1809 limit
<<= ((valsize
- 1) >> 1);
1810 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1811 return value
> (limit
<< 1) - 1;
1814 template<int valsize
>
1816 has_overflow_bitfield(Address value
)
1818 return (has_overflow_unsigned
<valsize
>(value
)
1819 && has_overflow_signed
<valsize
>(value
));
1822 template<int valsize
>
1823 static inline Status
1824 overflowed(Address value
, Overflow_check overflow
)
1826 if (overflow
== CHECK_SIGNED
)
1828 if (has_overflow_signed
<valsize
>(value
))
1829 return STATUS_OVERFLOW
;
1831 else if (overflow
== CHECK_UNSIGNED
)
1833 if (has_overflow_unsigned
<valsize
>(value
))
1834 return STATUS_OVERFLOW
;
1836 else if (overflow
== CHECK_BITFIELD
)
1838 if (has_overflow_bitfield
<valsize
>(value
))
1839 return STATUS_OVERFLOW
;
1844 // Do a simple RELA relocation
1845 template<int fieldsize
, int valsize
>
1846 static inline Status
1847 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1849 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1850 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1851 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1852 return overflowed
<valsize
>(value
, overflow
);
1855 template<int fieldsize
, int valsize
>
1856 static inline Status
1857 rela(unsigned char* view
,
1858 unsigned int right_shift
,
1859 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1861 Overflow_check overflow
)
1863 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1864 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1865 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1866 Valtype reloc
= value
>> right_shift
;
1869 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1870 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1873 // Do a simple RELA relocation, unaligned.
1874 template<int fieldsize
, int valsize
>
1875 static inline Status
1876 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1878 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1879 return overflowed
<valsize
>(value
, overflow
);
1882 template<int fieldsize
, int valsize
>
1883 static inline Status
1884 rela_ua(unsigned char* view
,
1885 unsigned int right_shift
,
1886 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1888 Overflow_check overflow
)
1890 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1892 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1893 Valtype reloc
= value
>> right_shift
;
1896 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1897 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1901 // R_PPC64_ADDR64: (Symbol + Addend)
1903 addr64(unsigned char* view
, Address value
)
1904 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1906 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1908 addr64_u(unsigned char* view
, Address value
)
1909 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1911 // R_POWERPC_ADDR32: (Symbol + Addend)
1912 static inline Status
1913 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1914 { return This::template rela
<32,32>(view
, value
, overflow
); }
1916 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1917 static inline Status
1918 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1919 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1921 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1922 static inline Status
1923 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1925 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1927 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1928 stat
= STATUS_OVERFLOW
;
1932 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1933 static inline Status
1934 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1935 { return This::template rela
<16,16>(view
, value
, overflow
); }
1937 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1938 static inline Status
1939 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1940 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1942 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1943 static inline Status
1944 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1946 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1947 if ((value
& 3) != 0)
1948 stat
= STATUS_OVERFLOW
;
1952 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1953 static inline Status
1954 addr16_dq(unsigned char* view
, Address value
, Overflow_check overflow
)
1956 Status stat
= This::template rela
<16,16>(view
, 0, 0xfff0, value
, overflow
);
1957 if ((value
& 15) != 0)
1958 stat
= STATUS_OVERFLOW
;
1962 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1964 addr16_hi(unsigned char* view
, Address value
)
1965 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1967 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1969 addr16_ha(unsigned char* view
, Address value
)
1970 { This::addr16_hi(view
, value
+ 0x8000); }
1972 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1974 addr16_hi2(unsigned char* view
, Address value
)
1975 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1977 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1979 addr16_ha2(unsigned char* view
, Address value
)
1980 { This::addr16_hi2(view
, value
+ 0x8000); }
1982 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1984 addr16_hi3(unsigned char* view
, Address value
)
1985 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1987 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1989 addr16_ha3(unsigned char* view
, Address value
)
1990 { This::addr16_hi3(view
, value
+ 0x8000); }
1992 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1993 static inline Status
1994 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1996 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1997 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1998 stat
= STATUS_OVERFLOW
;
2002 // R_POWERPC_REL16DX_HA
2003 static inline Status
2004 addr16dx_ha(unsigned char *view
, Address value
, Overflow_check overflow
)
2006 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
2007 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
2008 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
2010 value
= static_cast<SignedAddress
>(value
) >> 16;
2011 val
|= (value
& 0xffc1) | ((value
& 0x3e) << 15);
2012 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
2013 return overflowed
<16>(value
, overflow
);
2017 // Set ABI version for input and output.
2019 template<int size
, bool big_endian
>
2021 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
2023 this->e_flags_
|= ver
;
2024 if (this->abiversion() != 0)
2026 Target_powerpc
<size
, big_endian
>* target
=
2027 static_cast<Target_powerpc
<size
, big_endian
>*>(
2028 parameters
->sized_target
<size
, big_endian
>());
2029 if (target
->abiversion() == 0)
2030 target
->set_abiversion(this->abiversion());
2031 else if (target
->abiversion() != this->abiversion())
2032 gold_error(_("%s: ABI version %d is not compatible "
2033 "with ABI version %d output"),
2034 this->name().c_str(),
2035 this->abiversion(), target
->abiversion());
2040 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
2041 // relocatable object, if such sections exists.
2043 template<int size
, bool big_endian
>
2045 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
2046 Read_symbols_data
* sd
)
2048 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2049 const unsigned char* namesu
= sd
->section_names
->data();
2050 const char* names
= reinterpret_cast<const char*>(namesu
);
2051 section_size_type names_size
= sd
->section_names_size
;
2052 const unsigned char* s
;
2054 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
2055 size
== 32 ? ".got2" : ".opd",
2056 names
, names_size
, NULL
);
2059 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2060 this->special_
= ndx
;
2063 if (this->abiversion() == 0)
2064 this->set_abiversion(1);
2065 else if (this->abiversion() > 1)
2066 gold_error(_("%s: .opd invalid in abiv%d"),
2067 this->name().c_str(), this->abiversion());
2072 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".rela.toc",
2073 names
, names_size
, NULL
);
2076 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
2077 this->relatoc_
= ndx
;
2078 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2079 this->toc_
= this->adjust_shndx(shdr
.get_sh_info());
2082 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
2085 // Examine .rela.opd to build info about function entry points.
2087 template<int size
, bool big_endian
>
2089 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
2091 const unsigned char* prelocs
,
2092 const unsigned char* plocal_syms
)
2096 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
2097 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
2098 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2099 Address expected_off
= 0;
2100 bool regular
= true;
2101 unsigned int opd_ent_size
= 0;
2103 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2105 Reltype
reloc(prelocs
);
2106 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
2107 = reloc
.get_r_info();
2108 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2109 if (r_type
== elfcpp::R_PPC64_ADDR64
)
2111 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2112 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
2115 if (r_sym
< this->local_symbol_count())
2117 typename
elfcpp::Sym
<size
, big_endian
>
2118 lsym(plocal_syms
+ r_sym
* sym_size
);
2119 shndx
= lsym
.get_st_shndx();
2120 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2121 value
= lsym
.get_st_value();
2124 shndx
= this->symbol_section_and_value(r_sym
, &value
,
2126 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
2127 value
+ reloc
.get_r_addend());
2130 expected_off
= reloc
.get_r_offset();
2131 opd_ent_size
= expected_off
;
2133 else if (expected_off
!= reloc
.get_r_offset())
2135 expected_off
+= opd_ent_size
;
2137 else if (r_type
== elfcpp::R_PPC64_TOC
)
2139 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
2144 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2145 this->name().c_str(), r_type
);
2149 if (reloc_count
<= 2)
2150 opd_ent_size
= this->section_size(this->opd_shndx());
2151 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
2155 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2156 this->name().c_str());
2162 // Returns true if a code sequence loading the TOC entry at VALUE
2163 // relative to the TOC pointer can be converted into code calculating
2164 // a TOC pointer relative offset.
2165 // If so, the TOC pointer relative offset is stored to VALUE.
2167 template<int size
, bool big_endian
>
2169 Powerpc_relobj
<size
, big_endian
>::make_toc_relative(
2170 Target_powerpc
<size
, big_endian
>* target
,
2176 // With -mcmodel=medium code it is quite possible to have
2177 // toc-relative relocs referring to objects outside the TOC.
2178 // Don't try to look at a non-existent TOC.
2179 if (this->toc_shndx() == 0)
2182 // Convert VALUE back to an address by adding got_base (see below),
2183 // then to an offset in the TOC by subtracting the TOC output
2184 // section address and the TOC output offset. Since this TOC output
2185 // section and the got output section are one and the same, we can
2186 // omit adding and subtracting the output section address.
2187 Address off
= (*value
+ this->toc_base_offset()
2188 - this->output_section_offset(this->toc_shndx()));
2189 // Is this offset in the TOC? -mcmodel=medium code may be using
2190 // TOC relative access to variables outside the TOC. Those of
2191 // course can't be optimized. We also don't try to optimize code
2192 // that is using a different object's TOC.
2193 if (off
>= this->section_size(this->toc_shndx()))
2196 if (this->no_toc_opt(off
))
2199 section_size_type vlen
;
2200 unsigned char* view
= this->get_output_view(this->toc_shndx(), &vlen
);
2201 Address addr
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ off
);
2203 Address got_base
= (target
->got_section()->output_section()->address()
2204 + this->toc_base_offset());
2206 if (addr
+ (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2213 // Perform the Sized_relobj_file method, then set up opd info from
2216 template<int size
, bool big_endian
>
2218 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
2220 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
2223 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
2224 p
!= rd
->relocs
.end();
2227 if (p
->data_shndx
== this->opd_shndx())
2229 uint64_t opd_size
= this->section_size(this->opd_shndx());
2230 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
2233 this->init_opd(opd_size
);
2234 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
2235 rd
->local_symbols
->data());
2243 // Read the symbols then set up st_other vector.
2245 template<int size
, bool big_endian
>
2247 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2249 this->base_read_symbols(sd
);
2252 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2253 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2254 const unsigned int loccount
= this->do_local_symbol_count();
2257 this->st_other_
.resize(loccount
);
2258 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2259 off_t locsize
= loccount
* sym_size
;
2260 const unsigned int symtab_shndx
= this->symtab_shndx();
2261 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
2262 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
2263 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
2264 locsize
, true, false);
2266 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2268 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2269 unsigned char st_other
= sym
.get_st_other();
2270 this->st_other_
[i
] = st_other
;
2271 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
2273 if (this->abiversion() == 0)
2274 this->set_abiversion(2);
2275 else if (this->abiversion() < 2)
2276 gold_error(_("%s: local symbol %d has invalid st_other"
2277 " for ABI version 1"),
2278 this->name().c_str(), i
);
2285 template<int size
, bool big_endian
>
2287 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
2289 this->e_flags_
|= ver
;
2290 if (this->abiversion() != 0)
2292 Target_powerpc
<size
, big_endian
>* target
=
2293 static_cast<Target_powerpc
<size
, big_endian
>*>(
2294 parameters
->sized_target
<size
, big_endian
>());
2295 if (target
->abiversion() == 0)
2296 target
->set_abiversion(this->abiversion());
2297 else if (target
->abiversion() != this->abiversion())
2298 gold_error(_("%s: ABI version %d is not compatible "
2299 "with ABI version %d output"),
2300 this->name().c_str(),
2301 this->abiversion(), target
->abiversion());
2306 // Call Sized_dynobj::base_read_symbols to read the symbols then
2307 // read .opd from a dynamic object, filling in opd_ent_ vector,
2309 template<int size
, bool big_endian
>
2311 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
2313 this->base_read_symbols(sd
);
2316 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2317 const unsigned char* const pshdrs
= sd
->section_headers
->data();
2318 const unsigned char* namesu
= sd
->section_names
->data();
2319 const char* names
= reinterpret_cast<const char*>(namesu
);
2320 const unsigned char* s
= NULL
;
2321 const unsigned char* opd
;
2322 section_size_type opd_size
;
2324 // Find and read .opd section.
2327 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
2328 sd
->section_names_size
,
2333 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2334 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2335 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
2337 if (this->abiversion() == 0)
2338 this->set_abiversion(1);
2339 else if (this->abiversion() > 1)
2340 gold_error(_("%s: .opd invalid in abiv%d"),
2341 this->name().c_str(), this->abiversion());
2343 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
2344 this->opd_address_
= shdr
.get_sh_addr();
2345 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
2346 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
2352 // Build set of executable sections.
2353 // Using a set is probably overkill. There is likely to be only
2354 // a few executable sections, typically .init, .text and .fini,
2355 // and they are generally grouped together.
2356 typedef std::set
<Sec_info
> Exec_sections
;
2357 Exec_sections exec_sections
;
2359 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
2361 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
2362 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
2363 && ((shdr
.get_sh_flags()
2364 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2365 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
2366 && shdr
.get_sh_size() != 0)
2368 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
2369 shdr
.get_sh_size(), i
));
2372 if (exec_sections
.empty())
2375 // Look over the OPD entries. This is complicated by the fact
2376 // that some binaries will use two-word entries while others
2377 // will use the standard three-word entries. In most cases
2378 // the third word (the environment pointer for languages like
2379 // Pascal) is unused and will be zero. If the third word is
2380 // used it should not be pointing into executable sections,
2382 this->init_opd(opd_size
);
2383 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2385 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2386 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2387 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2389 // Chances are that this is the third word of an OPD entry.
2391 typename
Exec_sections::const_iterator e
2392 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2393 if (e
!= exec_sections
.begin())
2396 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2398 // We have an address in an executable section.
2399 // VAL ought to be the function entry, set it up.
2400 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2401 // Skip second word of OPD entry, the TOC pointer.
2405 // If we didn't match any executable sections, we likely
2406 // have a non-zero third word in the OPD entry.
2411 // Relocate sections.
2413 template<int size
, bool big_endian
>
2415 Powerpc_relobj
<size
, big_endian
>::do_relocate_sections(
2416 const Symbol_table
* symtab
, const Layout
* layout
,
2417 const unsigned char* pshdrs
, Output_file
* of
,
2418 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
2420 unsigned int start
= 1;
2422 && this->relatoc_
!= 0
2423 && !parameters
->options().relocatable())
2425 // Relocate .toc first.
2426 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2427 this->relatoc_
, this->relatoc_
);
2428 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2429 1, this->relatoc_
- 1);
2430 start
= this->relatoc_
+ 1;
2432 this->relocate_section_range(symtab
, layout
, pshdrs
, of
, pviews
,
2433 start
, this->shnum() - 1);
2436 // Set up some symbols.
2438 template<int size
, bool big_endian
>
2440 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2441 Symbol_table
* symtab
,
2446 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2447 // undefined when scanning relocs (and thus requires
2448 // non-relative dynamic relocs). The proper value will be
2450 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2451 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2453 Target_powerpc
<size
, big_endian
>* target
=
2454 static_cast<Target_powerpc
<size
, big_endian
>*>(
2455 parameters
->sized_target
<size
, big_endian
>());
2456 Output_data_got_powerpc
<size
, big_endian
>* got
2457 = target
->got_section(symtab
, layout
);
2458 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2459 Symbol_table::PREDEFINED
,
2463 elfcpp::STV_HIDDEN
, 0,
2467 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2468 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2469 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2471 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2473 = layout
->add_output_section_data(".sdata", 0,
2475 | elfcpp::SHF_WRITE
,
2476 sdata
, ORDER_SMALL_DATA
, false);
2477 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2478 Symbol_table::PREDEFINED
,
2479 os
, 32768, 0, elfcpp::STT_OBJECT
,
2480 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2486 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2487 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2488 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2490 Target_powerpc
<size
, big_endian
>* target
=
2491 static_cast<Target_powerpc
<size
, big_endian
>*>(
2492 parameters
->sized_target
<size
, big_endian
>());
2493 Output_data_got_powerpc
<size
, big_endian
>* got
2494 = target
->got_section(symtab
, layout
);
2495 symtab
->define_in_output_data(".TOC.", NULL
,
2496 Symbol_table::PREDEFINED
,
2500 elfcpp::STV_HIDDEN
, 0,
2505 this->tls_get_addr_
= symtab
->lookup("__tls_get_addr");
2506 if (parameters
->options().tls_get_addr_optimize()
2507 && this->tls_get_addr_
!= NULL
2508 && this->tls_get_addr_
->in_reg())
2509 this->tls_get_addr_opt_
= symtab
->lookup("__tls_get_addr_opt");
2510 if (this->tls_get_addr_opt_
!= NULL
)
2512 if (this->tls_get_addr_
->is_undefined()
2513 || this->tls_get_addr_
->is_from_dynobj())
2515 // Make it seem as if references to __tls_get_addr are
2516 // really to __tls_get_addr_opt, so the latter symbol is
2517 // made dynamic, not the former.
2518 this->tls_get_addr_
->clear_in_reg();
2519 this->tls_get_addr_opt_
->set_in_reg();
2521 // We have a non-dynamic definition for __tls_get_addr.
2522 // Make __tls_get_addr_opt the same, if it does not already have
2523 // a non-dynamic definition.
2524 else if (this->tls_get_addr_opt_
->is_undefined()
2525 || this->tls_get_addr_opt_
->is_from_dynobj())
2527 Sized_symbol
<size
>* from
2528 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_
);
2529 Sized_symbol
<size
>* to
2530 = static_cast<Sized_symbol
<size
>*>(this->tls_get_addr_opt_
);
2531 symtab
->clone
<size
>(to
, from
);
2536 // Set up PowerPC target specific relobj.
2538 template<int size
, bool big_endian
>
2540 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2541 const std::string
& name
,
2542 Input_file
* input_file
,
2543 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2545 int et
= ehdr
.get_e_type();
2546 // ET_EXEC files are valid input for --just-symbols/-R,
2547 // and we treat them as relocatable objects.
2548 if (et
== elfcpp::ET_REL
2549 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2551 Powerpc_relobj
<size
, big_endian
>* obj
=
2552 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2556 else if (et
== elfcpp::ET_DYN
)
2558 Powerpc_dynobj
<size
, big_endian
>* obj
=
2559 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2565 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2570 template<int size
, bool big_endian
>
2571 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2574 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2575 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2577 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2578 : Output_data_got
<size
, big_endian
>(),
2579 symtab_(symtab
), layout_(layout
),
2580 header_ent_cnt_(size
== 32 ? 3 : 1),
2581 header_index_(size
== 32 ? 0x2000 : 0)
2584 this->set_addralign(256);
2587 // Override all the Output_data_got methods we use so as to first call
2590 add_global(Symbol
* gsym
, unsigned int got_type
)
2592 this->reserve_ent();
2593 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2597 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2599 this->reserve_ent();
2600 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2604 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2605 { return this->add_global_plt(gsym
, got_type
); }
2608 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2609 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2611 this->reserve_ent();
2612 Output_data_got
<size
, big_endian
>::
2613 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2617 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2618 Output_data_reloc_generic
* rel_dyn
,
2619 unsigned int r_type_1
, unsigned int r_type_2
)
2621 if (gsym
->has_got_offset(got_type
))
2624 this->reserve_ent(2);
2625 Output_data_got
<size
, big_endian
>::
2626 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2630 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2632 this->reserve_ent();
2633 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2638 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2640 this->reserve_ent();
2641 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2646 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2647 { return this->add_local_plt(object
, sym_index
, got_type
); }
2650 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2651 unsigned int got_type
,
2652 Output_data_reloc_generic
* rel_dyn
,
2653 unsigned int r_type
)
2655 if (object
->local_has_got_offset(sym_index
, got_type
))
2658 this->reserve_ent(2);
2659 Output_data_got
<size
, big_endian
>::
2660 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2664 add_constant(Valtype constant
)
2666 this->reserve_ent();
2667 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2671 add_constant_pair(Valtype c1
, Valtype c2
)
2673 this->reserve_ent(2);
2674 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2677 // Offset of _GLOBAL_OFFSET_TABLE_.
2681 return this->got_offset(this->header_index_
);
2684 // Offset of base used to access the GOT/TOC.
2685 // The got/toc pointer reg will be set to this value.
2687 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2690 return this->g_o_t();
2692 return (this->output_section()->address()
2693 + object
->toc_base_offset()
2697 // Ensure our GOT has a header.
2699 set_final_data_size()
2701 if (this->header_ent_cnt_
!= 0)
2702 this->make_header();
2703 Output_data_got
<size
, big_endian
>::set_final_data_size();
2706 // First word of GOT header needs some values that are not
2707 // handled by Output_data_got so poke them in here.
2708 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2710 do_write(Output_file
* of
)
2713 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2714 val
= this->layout_
->dynamic_section()->address();
2716 val
= this->output_section()->address() + 0x8000;
2717 this->replace_constant(this->header_index_
, val
);
2718 Output_data_got
<size
, big_endian
>::do_write(of
);
2723 reserve_ent(unsigned int cnt
= 1)
2725 if (this->header_ent_cnt_
== 0)
2727 if (this->num_entries() + cnt
> this->header_index_
)
2728 this->make_header();
2734 this->header_ent_cnt_
= 0;
2735 this->header_index_
= this->num_entries();
2738 Output_data_got
<size
, big_endian
>::add_constant(0);
2739 Output_data_got
<size
, big_endian
>::add_constant(0);
2740 Output_data_got
<size
, big_endian
>::add_constant(0);
2742 // Define _GLOBAL_OFFSET_TABLE_ at the header
2743 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2746 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2747 sym
->set_value(this->g_o_t());
2750 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2751 Symbol_table::PREDEFINED
,
2752 this, this->g_o_t(), 0,
2755 elfcpp::STV_HIDDEN
, 0,
2759 Output_data_got
<size
, big_endian
>::add_constant(0);
2762 // Stashed pointers.
2763 Symbol_table
* symtab_
;
2767 unsigned int header_ent_cnt_
;
2768 // GOT header index.
2769 unsigned int header_index_
;
2772 // Get the GOT section, creating it if necessary.
2774 template<int size
, bool big_endian
>
2775 Output_data_got_powerpc
<size
, big_endian
>*
2776 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2779 if (this->got_
== NULL
)
2781 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2784 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2786 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2787 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2788 this->got_
, ORDER_DATA
, false);
2794 // Get the dynamic reloc section, creating it if necessary.
2796 template<int size
, bool big_endian
>
2797 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2798 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2800 if (this->rela_dyn_
== NULL
)
2802 gold_assert(layout
!= NULL
);
2803 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2804 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2805 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2806 ORDER_DYNAMIC_RELOCS
, false);
2808 return this->rela_dyn_
;
2811 // Similarly, but for ifunc symbols get the one for ifunc.
2813 template<int size
, bool big_endian
>
2814 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2815 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2820 return this->rela_dyn_section(layout
);
2822 if (this->iplt_
== NULL
)
2823 this->make_iplt_section(symtab
, layout
);
2824 return this->iplt_
->rel_plt();
2830 // Determine the stub group size. The group size is the absolute
2831 // value of the parameter --stub-group-size. If --stub-group-size
2832 // is passed a negative value, we restrict stubs to be always after
2833 // the stubbed branches.
2834 Stub_control(int32_t size
, bool no_size_errors
, bool multi_os
)
2835 : stub_group_size_(abs(size
)), stubs_always_after_branch_(size
< 0),
2836 suppress_size_errors_(no_size_errors
), multi_os_(multi_os
),
2837 state_(NO_GROUP
), group_size_(0), group_start_addr_(0),
2838 owner_(NULL
), output_section_(NULL
)
2842 // Return true iff input section can be handled by current stub
2845 can_add_to_stub_group(Output_section
* o
,
2846 const Output_section::Input_section
* i
,
2849 const Output_section::Input_section
*
2855 { return output_section_
; }
2858 set_output_and_owner(Output_section
* o
,
2859 const Output_section::Input_section
* i
)
2861 this->output_section_
= o
;
2870 // Adding group sections before the stubs.
2871 FINDING_STUB_SECTION
,
2872 // Adding group sections after the stubs.
2876 uint32_t stub_group_size_
;
2877 bool stubs_always_after_branch_
;
2878 bool suppress_size_errors_
;
2879 // True if a stub group can serve multiple output sections.
2882 // Current max size of group. Starts at stub_group_size_ but is
2883 // reduced to stub_group_size_/1024 on seeing a section with
2884 // external conditional branches.
2885 uint32_t group_size_
;
2886 uint64_t group_start_addr_
;
2887 // owner_ and output_section_ specify the section to which stubs are
2888 // attached. The stubs are placed at the end of this section.
2889 const Output_section::Input_section
* owner_
;
2890 Output_section
* output_section_
;
2893 // Return true iff input section can be handled by current stub
2894 // group. Sections are presented to this function in order,
2895 // so the first section is the head of the group.
2898 Stub_control::can_add_to_stub_group(Output_section
* o
,
2899 const Output_section::Input_section
* i
,
2902 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2904 uint64_t start_addr
= o
->address();
2907 // .init and .fini sections are pasted together to form a single
2908 // function. We can't be adding stubs in the middle of the function.
2909 this_size
= o
->data_size();
2912 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2913 this_size
= i
->data_size();
2916 uint64_t end_addr
= start_addr
+ this_size
;
2917 uint32_t group_size
= this->stub_group_size_
;
2919 this->group_size_
= group_size
= group_size
>> 10;
2921 if (this_size
> group_size
&& !this->suppress_size_errors_
)
2922 gold_warning(_("%s:%s exceeds group size"),
2923 i
->relobj()->name().c_str(),
2924 i
->relobj()->section_name(i
->shndx()).c_str());
2926 gold_debug(DEBUG_TARGET
, "maybe add%s %s:%s size=%#llx total=%#llx",
2927 has14
? " 14bit" : "",
2928 i
->relobj()->name().c_str(),
2929 i
->relobj()->section_name(i
->shndx()).c_str(),
2930 (long long) this_size
,
2931 (this->state_
== NO_GROUP
2933 : (long long) end_addr
- this->group_start_addr_
));
2935 if (this->state_
== NO_GROUP
)
2937 // Only here on very first use of Stub_control
2939 this->output_section_
= o
;
2940 this->state_
= FINDING_STUB_SECTION
;
2941 this->group_size_
= group_size
;
2942 this->group_start_addr_
= start_addr
;
2945 else if (!this->multi_os_
&& this->output_section_
!= o
)
2947 else if (this->state_
== HAS_STUB_SECTION
)
2949 // Can we add this section, which is after the stubs, to the
2951 if (end_addr
- this->group_start_addr_
<= this->group_size_
)
2954 else if (this->state_
== FINDING_STUB_SECTION
)
2956 if ((whole_sec
&& this->output_section_
== o
)
2957 || end_addr
- this->group_start_addr_
<= this->group_size_
)
2959 // Stubs are added at the end of "owner_".
2961 this->output_section_
= o
;
2964 // The group before the stubs has reached maximum size.
2965 // Now see about adding sections after the stubs to the
2966 // group. If the current section has a 14-bit branch and
2967 // the group before the stubs exceeds group_size_ (because
2968 // they didn't have 14-bit branches), don't add sections
2969 // after the stubs: The size of stubs for such a large
2970 // group may exceed the reach of a 14-bit branch.
2971 if (!this->stubs_always_after_branch_
2972 && this_size
<= this->group_size_
2973 && start_addr
- this->group_start_addr_
<= this->group_size_
)
2975 gold_debug(DEBUG_TARGET
, "adding after stubs");
2976 this->state_
= HAS_STUB_SECTION
;
2977 this->group_start_addr_
= start_addr
;
2984 gold_debug(DEBUG_TARGET
,
2985 !this->multi_os_
&& this->output_section_
!= o
2986 ? "nope, new output section\n"
2987 : "nope, didn't fit\n");
2989 // The section fails to fit in the current group. Set up a few
2990 // things for the next group. owner_ and output_section_ will be
2991 // set later after we've retrieved those values for the current
2993 this->state_
= FINDING_STUB_SECTION
;
2994 this->group_size_
= group_size
;
2995 this->group_start_addr_
= start_addr
;
2999 // Look over all the input sections, deciding where to place stubs.
3001 template<int size
, bool big_endian
>
3003 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
3005 bool no_size_errors
)
3007 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
,
3008 parameters
->options().stub_group_multi());
3010 // Group input sections and insert stub table
3011 Stub_table_owner
* table_owner
= NULL
;
3012 std::vector
<Stub_table_owner
*> tables
;
3013 Layout::Section_list section_list
;
3014 layout
->get_executable_sections(§ion_list
);
3015 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
3016 for (Layout::Section_list::iterator o
= section_list
.begin();
3017 o
!= section_list
.end();
3020 typedef Output_section::Input_section_list Input_section_list
;
3021 for (Input_section_list::const_iterator i
3022 = (*o
)->input_sections().begin();
3023 i
!= (*o
)->input_sections().end();
3026 if (i
->is_input_section()
3027 || i
->is_relaxed_input_section())
3029 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3030 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
3031 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
3032 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
3034 table_owner
->output_section
= stub_control
.output_section();
3035 table_owner
->owner
= stub_control
.owner();
3036 stub_control
.set_output_and_owner(*o
, &*i
);
3039 if (table_owner
== NULL
)
3041 table_owner
= new Stub_table_owner
;
3042 tables
.push_back(table_owner
);
3044 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
3048 if (table_owner
!= NULL
)
3050 table_owner
->output_section
= stub_control
.output_section();
3051 table_owner
->owner
= stub_control
.owner();;
3053 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
3057 Stub_table
<size
, big_endian
>* stub_table
;
3059 if ((*t
)->owner
->is_input_section())
3060 stub_table
= new Stub_table
<size
, big_endian
>(this,
3061 (*t
)->output_section
,
3063 this->stub_tables_
.size());
3064 else if ((*t
)->owner
->is_relaxed_input_section())
3065 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
3066 (*t
)->owner
->relaxed_input_section());
3069 this->stub_tables_
.push_back(stub_table
);
3074 static unsigned long
3075 max_branch_delta (unsigned int r_type
)
3077 if (r_type
== elfcpp::R_POWERPC_REL14
3078 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
3079 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
3081 if (r_type
== elfcpp::R_POWERPC_REL24
3082 || r_type
== elfcpp::R_PPC_PLTREL24
3083 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
3088 // Return whether this branch is going via a plt call stub.
3090 template<int size
, bool big_endian
>
3092 Target_powerpc
<size
, big_endian
>::Branch_info::mark_pltcall(
3093 Powerpc_relobj
<size
, big_endian
>* ppc_object
,
3096 Target_powerpc
* target
,
3097 Symbol_table
* symtab
)
3099 if (this->object_
!= ppc_object
3100 || this->shndx_
!= shndx
3101 || this->offset_
!= offset
)
3104 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3105 if (sym
!= NULL
&& sym
->is_forwarder())
3106 sym
= symtab
->resolve_forwards(sym
);
3107 if (target
->replace_tls_get_addr(sym
))
3108 sym
= target
->tls_get_addr_opt();
3109 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3111 ? (gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3112 && !target
->is_elfv2_localentry0(gsym
))
3113 : (this->object_
->local_has_plt_offset(this->r_sym_
)
3114 && !target
->is_elfv2_localentry0(this->object_
, this->r_sym_
)))
3122 // If this branch needs a plt call stub, or a long branch stub, make one.
3124 template<int size
, bool big_endian
>
3126 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
3127 Stub_table
<size
, big_endian
>* stub_table
,
3128 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
3129 Symbol_table
* symtab
) const
3131 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
3132 Target_powerpc
<size
, big_endian
>* target
=
3133 static_cast<Target_powerpc
<size
, big_endian
>*>(
3134 parameters
->sized_target
<size
, big_endian
>());
3135 if (sym
!= NULL
&& sym
->is_forwarder())
3136 sym
= symtab
->resolve_forwards(sym
);
3137 if (target
->replace_tls_get_addr(sym
))
3138 sym
= target
->tls_get_addr_opt();
3139 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
3143 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
3144 : this->object_
->local_has_plt_offset(this->r_sym_
))
3148 && target
->abiversion() >= 2
3149 && !parameters
->options().output_is_position_independent()
3150 && !is_branch_reloc(this->r_type_
))
3151 target
->glink_section()->add_global_entry(gsym
);
3154 if (stub_table
== NULL
3157 && !parameters
->options().output_is_position_independent()
3158 && !is_branch_reloc(this->r_type_
)))
3159 stub_table
= this->object_
->stub_table(this->shndx_
);
3160 if (stub_table
== NULL
)
3162 // This is a ref from a data section to an ifunc symbol,
3163 // or a non-branch reloc for which we always want to use
3164 // one set of stubs for resolving function addresses.
3165 stub_table
= ifunc_stub_table
;
3167 gold_assert(stub_table
!= NULL
);
3168 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3169 if (from
!= invalid_address
)
3170 from
+= (this->object_
->output_section(this->shndx_
)->address()
3173 ok
= stub_table
->add_plt_call_entry(from
,
3174 this->object_
, gsym
,
3175 this->r_type_
, this->addend_
,
3178 ok
= stub_table
->add_plt_call_entry(from
,
3179 this->object_
, this->r_sym_
,
3180 this->r_type_
, this->addend_
,
3186 Address max_branch_offset
= max_branch_delta(this->r_type_
);
3187 if (max_branch_offset
== 0)
3189 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
3190 gold_assert(from
!= invalid_address
);
3191 from
+= (this->object_
->output_section(this->shndx_
)->address()
3196 switch (gsym
->source())
3198 case Symbol::FROM_OBJECT
:
3200 Object
* symobj
= gsym
->object();
3201 if (symobj
->is_dynamic()
3202 || symobj
->pluginobj() != NULL
)
3205 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
3206 if (shndx
== elfcpp::SHN_UNDEF
)
3211 case Symbol::IS_UNDEFINED
:
3217 Symbol_table::Compute_final_value_status status
;
3218 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
3219 if (status
!= Symbol_table::CFVS_OK
)
3222 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
3226 const Symbol_value
<size
>* psymval
3227 = this->object_
->local_symbol(this->r_sym_
);
3228 Symbol_value
<size
> symval
;
3229 if (psymval
->is_section_symbol())
3230 symval
.set_is_section_symbol();
3231 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
3232 typename
ObjType::Compute_final_local_value_status status
3233 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
3235 if (status
!= ObjType::CFLV_OK
3236 || !symval
.has_output_value())
3238 to
= symval
.value(this->object_
, 0);
3240 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
3242 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
3243 to
+= this->addend_
;
3244 if (stub_table
== NULL
)
3245 stub_table
= this->object_
->stub_table(this->shndx_
);
3246 if (size
== 64 && target
->abiversion() < 2)
3248 unsigned int dest_shndx
;
3249 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
3253 Address delta
= to
- from
;
3254 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
3256 if (stub_table
== NULL
)
3258 gold_warning(_("%s:%s: branch in non-executable section,"
3259 " no long branch stub for you"),
3260 this->object_
->name().c_str(),
3261 this->object_
->section_name(this->shndx_
).c_str());
3264 bool save_res
= (size
== 64
3266 && gsym
->source() == Symbol::IN_OUTPUT_DATA
3267 && gsym
->output_data() == target
->savres_section());
3268 ok
= stub_table
->add_long_branch_entry(this->object_
,
3270 from
, to
, save_res
);
3274 gold_debug(DEBUG_TARGET
,
3275 "branch at %s:%s+%#lx\n"
3276 "can't reach stub attached to %s:%s",
3277 this->object_
->name().c_str(),
3278 this->object_
->section_name(this->shndx_
).c_str(),
3279 (unsigned long) this->offset_
,
3280 stub_table
->relobj()->name().c_str(),
3281 stub_table
->relobj()->section_name(stub_table
->shndx()).c_str());
3286 // Relaxation hook. This is where we do stub generation.
3288 template<int size
, bool big_endian
>
3290 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
3291 const Input_objects
*,
3292 Symbol_table
* symtab
,
3296 unsigned int prev_brlt_size
= 0;
3300 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
3302 && this->abiversion() < 2
3304 && !parameters
->options().user_set_plt_thread_safe())
3306 static const char* const thread_starter
[] =
3310 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3312 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3313 "mq_notify", "create_timer",
3318 "GOMP_parallel_start",
3319 "GOMP_parallel_loop_static",
3320 "GOMP_parallel_loop_static_start",
3321 "GOMP_parallel_loop_dynamic",
3322 "GOMP_parallel_loop_dynamic_start",
3323 "GOMP_parallel_loop_guided",
3324 "GOMP_parallel_loop_guided_start",
3325 "GOMP_parallel_loop_runtime",
3326 "GOMP_parallel_loop_runtime_start",
3327 "GOMP_parallel_sections",
3328 "GOMP_parallel_sections_start",
3333 if (parameters
->options().shared())
3337 for (unsigned int i
= 0;
3338 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
3341 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
3342 thread_safe
= (sym
!= NULL
3344 && sym
->in_real_elf());
3350 this->plt_thread_safe_
= thread_safe
;
3355 this->stub_group_size_
= parameters
->options().stub_group_size();
3356 bool no_size_errors
= true;
3357 if (this->stub_group_size_
== 1)
3358 this->stub_group_size_
= 0x1c00000;
3359 else if (this->stub_group_size_
== -1)
3360 this->stub_group_size_
= -0x1e00000;
3362 no_size_errors
= false;
3363 this->group_sections(layout
, task
, no_size_errors
);
3365 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
3367 this->branch_lookup_table_
.clear();
3368 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3369 p
!= this->stub_tables_
.end();
3372 (*p
)->clear_stubs(true);
3374 this->stub_tables_
.clear();
3375 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
3376 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3377 program_name
, this->stub_group_size_
);
3378 this->group_sections(layout
, task
, true);
3381 // We need address of stub tables valid for make_stub.
3382 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3383 p
!= this->stub_tables_
.end();
3386 const Powerpc_relobj
<size
, big_endian
>* object
3387 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
3388 Address off
= object
->get_output_section_offset((*p
)->shndx());
3389 gold_assert(off
!= invalid_address
);
3390 Output_section
* os
= (*p
)->output_section();
3391 (*p
)->set_address_and_size(os
, off
);
3396 // Clear plt call stubs, long branch stubs and branch lookup table.
3397 prev_brlt_size
= this->branch_lookup_table_
.size();
3398 this->branch_lookup_table_
.clear();
3399 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3400 p
!= this->stub_tables_
.end();
3403 (*p
)->clear_stubs(false);
3407 // Build all the stubs.
3408 this->relax_failed_
= false;
3409 Stub_table
<size
, big_endian
>* ifunc_stub_table
3410 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
3411 Stub_table
<size
, big_endian
>* one_stub_table
3412 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
3413 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
3414 b
!= this->branch_info_
.end();
3417 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
3418 && !this->relax_failed_
)
3420 this->relax_failed_
= true;
3421 this->relax_fail_count_
++;
3422 if (this->relax_fail_count_
< 3)
3427 // Did anything change size?
3428 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
3429 bool again
= num_huge_branches
!= prev_brlt_size
;
3430 if (size
== 64 && num_huge_branches
!= 0)
3431 this->make_brlt_section(layout
);
3432 if (size
== 64 && again
)
3433 this->brlt_section_
->set_current_size(num_huge_branches
);
3435 for (typename
Stub_tables::reverse_iterator p
= this->stub_tables_
.rbegin();
3436 p
!= this->stub_tables_
.rend();
3438 (*p
)->remove_eh_frame(layout
);
3440 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3441 p
!= this->stub_tables_
.end();
3443 (*p
)->add_eh_frame(layout
);
3445 typedef Unordered_set
<Output_section
*> Output_sections
;
3446 Output_sections os_need_update
;
3447 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3448 p
!= this->stub_tables_
.end();
3451 if ((*p
)->size_update())
3454 os_need_update
.insert((*p
)->output_section());
3458 // Set output section offsets for all input sections in an output
3459 // section that just changed size. Anything past the stubs will
3461 for (typename
Output_sections::iterator p
= os_need_update
.begin();
3462 p
!= os_need_update
.end();
3465 Output_section
* os
= *p
;
3467 typedef Output_section::Input_section_list Input_section_list
;
3468 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
3469 i
!= os
->input_sections().end();
3472 off
= align_address(off
, i
->addralign());
3473 if (i
->is_input_section() || i
->is_relaxed_input_section())
3474 i
->relobj()->set_section_offset(i
->shndx(), off
);
3475 if (i
->is_relaxed_input_section())
3477 Stub_table
<size
, big_endian
>* stub_table
3478 = static_cast<Stub_table
<size
, big_endian
>*>(
3479 i
->relaxed_input_section());
3480 Address stub_table_size
= stub_table
->set_address_and_size(os
, off
);
3481 off
+= stub_table_size
;
3482 // After a few iterations, set current stub table size
3483 // as min size threshold, so later stub tables can only
3486 stub_table
->set_min_size_threshold(stub_table_size
);
3489 off
+= i
->data_size();
3491 // If .branch_lt is part of this output section, then we have
3492 // just done the offset adjustment.
3493 os
->clear_section_offsets_need_adjustment();
3498 && num_huge_branches
!= 0
3499 && parameters
->options().output_is_position_independent())
3501 // Fill in the BRLT relocs.
3502 this->brlt_section_
->reset_brlt_sizes();
3503 for (typename
Branch_lookup_table::const_iterator p
3504 = this->branch_lookup_table_
.begin();
3505 p
!= this->branch_lookup_table_
.end();
3508 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
3510 this->brlt_section_
->finalize_brlt_sizes();
3514 && (parameters
->options().user_set_emit_stub_syms()
3515 ? parameters
->options().emit_stub_syms()
3517 || parameters
->options().output_is_position_independent()
3518 || parameters
->options().emit_relocs())))
3520 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
3521 p
!= this->stub_tables_
.end();
3523 (*p
)->define_stub_syms(symtab
);
3525 if (this->glink_
!= NULL
)
3527 int stub_size
= this->glink_
->pltresolve_size();
3528 Address value
= -stub_size
;
3534 this->define_local(symtab
, "__glink_PLTresolve",
3535 this->glink_
, value
, stub_size
);
3538 this->define_local(symtab
, "__glink", this->glink_
, 0, 0);
3545 template<int size
, bool big_endian
>
3547 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
3548 unsigned char* oview
,
3552 uint64_t address
= plt
->address();
3553 off_t len
= plt
->data_size();
3555 if (plt
== this->glink_
)
3557 // See Output_data_glink::do_write() for glink contents.
3560 gold_assert(parameters
->doing_static_link());
3561 // Static linking may need stubs, to support ifunc and long
3562 // branches. We need to create an output section for
3563 // .eh_frame early in the link process, to have a place to
3564 // attach stub .eh_frame info. We also need to have
3565 // registered a CIE that matches the stub CIE. Both of
3566 // these requirements are satisfied by creating an FDE and
3567 // CIE for .glink, even though static linking will leave
3568 // .glink zero length.
3569 // ??? Hopefully generating an FDE with a zero address range
3570 // won't confuse anything that consumes .eh_frame info.
3572 else if (size
== 64)
3574 // There is one word before __glink_PLTresolve
3578 else if (parameters
->options().output_is_position_independent())
3580 // There are two FDEs for a position independent glink.
3581 // The first covers the branch table, the second
3582 // __glink_PLTresolve at the end of glink.
3583 off_t resolve_size
= this->glink_
->pltresolve_size();
3584 if (oview
[9] == elfcpp::DW_CFA_nop
)
3585 len
-= resolve_size
;
3588 address
+= len
- resolve_size
;
3595 // Must be a stub table.
3596 const Stub_table
<size
, big_endian
>* stub_table
3597 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3598 uint64_t stub_address
= stub_table
->stub_address();
3599 len
-= stub_address
- address
;
3600 address
= stub_address
;
3603 *paddress
= address
;
3607 // A class to handle the PLT data.
3609 template<int size
, bool big_endian
>
3610 class Output_data_plt_powerpc
: public Output_section_data_build
3613 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3614 size
, big_endian
> Reloc_section
;
3616 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3617 Reloc_section
* plt_rel
,
3619 : Output_section_data_build(size
== 32 ? 4 : 8),
3625 // Add an entry to the PLT.
3630 add_ifunc_entry(Symbol
*);
3633 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3635 // Return the .rela.plt section data.
3642 // Return the number of PLT entries.
3646 if (this->current_data_size() == 0)
3648 return ((this->current_data_size() - this->first_plt_entry_offset())
3649 / this->plt_entry_size());
3654 do_adjust_output_section(Output_section
* os
)
3659 // Write to a map file.
3661 do_print_to_mapfile(Mapfile
* mapfile
) const
3662 { mapfile
->print_output_data(this, this->name_
); }
3665 // Return the offset of the first non-reserved PLT entry.
3667 first_plt_entry_offset() const
3669 // IPLT has no reserved entry.
3670 if (this->name_
[3] == 'I')
3672 return this->targ_
->first_plt_entry_offset();
3675 // Return the size of each PLT entry.
3677 plt_entry_size() const
3679 return this->targ_
->plt_entry_size();
3682 // Write out the PLT data.
3684 do_write(Output_file
*);
3686 // The reloc section.
3687 Reloc_section
* rel_
;
3688 // Allows access to .glink for do_write.
3689 Target_powerpc
<size
, big_endian
>* targ_
;
3690 // What to report in map file.
3694 // Add an entry to the PLT.
3696 template<int size
, bool big_endian
>
3698 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3700 if (!gsym
->has_plt_offset())
3702 section_size_type off
= this->current_data_size();
3704 off
+= this->first_plt_entry_offset();
3705 gsym
->set_plt_offset(off
);
3706 gsym
->set_needs_dynsym_entry();
3707 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3708 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3709 off
+= this->plt_entry_size();
3710 this->set_current_data_size(off
);
3714 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3716 template<int size
, bool big_endian
>
3718 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3720 if (!gsym
->has_plt_offset())
3722 section_size_type off
= this->current_data_size();
3723 gsym
->set_plt_offset(off
);
3724 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3725 if (size
== 64 && this->targ_
->abiversion() < 2)
3726 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3727 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3728 off
+= this->plt_entry_size();
3729 this->set_current_data_size(off
);
3733 // Add an entry for a local ifunc symbol to the IPLT.
3735 template<int size
, bool big_endian
>
3737 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3738 Sized_relobj_file
<size
, big_endian
>* relobj
,
3739 unsigned int local_sym_index
)
3741 if (!relobj
->local_has_plt_offset(local_sym_index
))
3743 section_size_type off
= this->current_data_size();
3744 relobj
->set_local_plt_offset(local_sym_index
, off
);
3745 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3746 if (size
== 64 && this->targ_
->abiversion() < 2)
3747 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3748 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3750 off
+= this->plt_entry_size();
3751 this->set_current_data_size(off
);
3755 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3756 static const uint32_t add_2_2_11
= 0x7c425a14;
3757 static const uint32_t add_2_2_12
= 0x7c426214;
3758 static const uint32_t add_3_3_2
= 0x7c631214;
3759 static const uint32_t add_3_3_13
= 0x7c636a14;
3760 static const uint32_t add_3_12_2
= 0x7c6c1214;
3761 static const uint32_t add_3_12_13
= 0x7c6c6a14;
3762 static const uint32_t add_11_0_11
= 0x7d605a14;
3763 static const uint32_t add_11_2_11
= 0x7d625a14;
3764 static const uint32_t add_11_11_2
= 0x7d6b1214;
3765 static const uint32_t addi_0_12
= 0x380c0000;
3766 static const uint32_t addi_2_2
= 0x38420000;
3767 static const uint32_t addi_3_3
= 0x38630000;
3768 static const uint32_t addi_11_11
= 0x396b0000;
3769 static const uint32_t addi_12_1
= 0x39810000;
3770 static const uint32_t addi_12_12
= 0x398c0000;
3771 static const uint32_t addis_0_2
= 0x3c020000;
3772 static const uint32_t addis_0_13
= 0x3c0d0000;
3773 static const uint32_t addis_2_12
= 0x3c4c0000;
3774 static const uint32_t addis_11_2
= 0x3d620000;
3775 static const uint32_t addis_11_11
= 0x3d6b0000;
3776 static const uint32_t addis_11_30
= 0x3d7e0000;
3777 static const uint32_t addis_12_1
= 0x3d810000;
3778 static const uint32_t addis_12_2
= 0x3d820000;
3779 static const uint32_t addis_12_12
= 0x3d8c0000;
3780 static const uint32_t b
= 0x48000000;
3781 static const uint32_t bcl_20_31
= 0x429f0005;
3782 static const uint32_t bctr
= 0x4e800420;
3783 static const uint32_t bctrl
= 0x4e800421;
3784 static const uint32_t beqlr
= 0x4d820020;
3785 static const uint32_t blr
= 0x4e800020;
3786 static const uint32_t bnectr_p4
= 0x4ce20420;
3787 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3788 static const uint32_t cmpldi_2_0
= 0x28220000;
3789 static const uint32_t cmpdi_11_0
= 0x2c2b0000;
3790 static const uint32_t cmpwi_11_0
= 0x2c0b0000;
3791 static const uint32_t cror_15_15_15
= 0x4def7b82;
3792 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3793 static const uint32_t ld_0_1
= 0xe8010000;
3794 static const uint32_t ld_0_12
= 0xe80c0000;
3795 static const uint32_t ld_2_1
= 0xe8410000;
3796 static const uint32_t ld_2_2
= 0xe8420000;
3797 static const uint32_t ld_2_11
= 0xe84b0000;
3798 static const uint32_t ld_2_12
= 0xe84c0000;
3799 static const uint32_t ld_11_1
= 0xe9610000;
3800 static const uint32_t ld_11_2
= 0xe9620000;
3801 static const uint32_t ld_11_3
= 0xe9630000;
3802 static const uint32_t ld_11_11
= 0xe96b0000;
3803 static const uint32_t ld_12_2
= 0xe9820000;
3804 static const uint32_t ld_12_3
= 0xe9830000;
3805 static const uint32_t ld_12_11
= 0xe98b0000;
3806 static const uint32_t ld_12_12
= 0xe98c0000;
3807 static const uint32_t lfd_0_1
= 0xc8010000;
3808 static const uint32_t li_0_0
= 0x38000000;
3809 static const uint32_t li_12_0
= 0x39800000;
3810 static const uint32_t lis_0
= 0x3c000000;
3811 static const uint32_t lis_2
= 0x3c400000;
3812 static const uint32_t lis_11
= 0x3d600000;
3813 static const uint32_t lis_12
= 0x3d800000;
3814 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3815 static const uint32_t lwz_0_12
= 0x800c0000;
3816 static const uint32_t lwz_11_3
= 0x81630000;
3817 static const uint32_t lwz_11_11
= 0x816b0000;
3818 static const uint32_t lwz_11_30
= 0x817e0000;
3819 static const uint32_t lwz_12_3
= 0x81830000;
3820 static const uint32_t lwz_12_12
= 0x818c0000;
3821 static const uint32_t lwzu_0_12
= 0x840c0000;
3822 static const uint32_t mflr_0
= 0x7c0802a6;
3823 static const uint32_t mflr_11
= 0x7d6802a6;
3824 static const uint32_t mflr_12
= 0x7d8802a6;
3825 static const uint32_t mr_0_3
= 0x7c601b78;
3826 static const uint32_t mr_3_0
= 0x7c030378;
3827 static const uint32_t mtctr_0
= 0x7c0903a6;
3828 static const uint32_t mtctr_11
= 0x7d6903a6;
3829 static const uint32_t mtctr_12
= 0x7d8903a6;
3830 static const uint32_t mtlr_0
= 0x7c0803a6;
3831 static const uint32_t mtlr_11
= 0x7d6803a6;
3832 static const uint32_t mtlr_12
= 0x7d8803a6;
3833 static const uint32_t nop
= 0x60000000;
3834 static const uint32_t ori_0_0_0
= 0x60000000;
3835 static const uint32_t srdi_0_0_2
= 0x7800f082;
3836 static const uint32_t std_0_1
= 0xf8010000;
3837 static const uint32_t std_0_12
= 0xf80c0000;
3838 static const uint32_t std_2_1
= 0xf8410000;
3839 static const uint32_t std_11_1
= 0xf9610000;
3840 static const uint32_t stfd_0_1
= 0xd8010000;
3841 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3842 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3843 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3844 static const uint32_t xor_2_12_12
= 0x7d826278;
3845 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3847 // Write out the PLT.
3849 template<int size
, bool big_endian
>
3851 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3853 if (size
== 32 && this->name_
[3] != 'I')
3855 const section_size_type offset
= this->offset();
3856 const section_size_type oview_size
3857 = convert_to_section_size_type(this->data_size());
3858 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3859 unsigned char* pov
= oview
;
3860 unsigned char* endpov
= oview
+ oview_size
;
3862 // The address of the .glink branch table
3863 const Output_data_glink
<size
, big_endian
>* glink
3864 = this->targ_
->glink_section();
3865 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3867 while (pov
< endpov
)
3869 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3874 of
->write_output_view(offset
, oview_size
, oview
);
3878 // Create the PLT section.
3880 template<int size
, bool big_endian
>
3882 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3885 if (this->plt_
== NULL
)
3887 if (this->got_
== NULL
)
3888 this->got_section(symtab
, layout
);
3890 if (this->glink_
== NULL
)
3891 make_glink_section(layout
);
3893 // Ensure that .rela.dyn always appears before .rela.plt This is
3894 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3895 // needs to include .rela.plt in its range.
3896 this->rela_dyn_section(layout
);
3898 Reloc_section
* plt_rel
= new Reloc_section(false);
3899 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3900 elfcpp::SHF_ALLOC
, plt_rel
,
3901 ORDER_DYNAMIC_PLT_RELOCS
, false);
3903 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3905 layout
->add_output_section_data(".plt",
3907 ? elfcpp::SHT_PROGBITS
3908 : elfcpp::SHT_NOBITS
),
3909 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3916 Output_section
* rela_plt_os
= plt_rel
->output_section();
3917 rela_plt_os
->set_info_section(this->plt_
->output_section());
3921 // Create the IPLT section.
3923 template<int size
, bool big_endian
>
3925 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3928 if (this->iplt_
== NULL
)
3930 this->make_plt_section(symtab
, layout
);
3932 Reloc_section
* iplt_rel
= new Reloc_section(false);
3933 if (this->rela_dyn_
->output_section())
3934 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3936 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3938 if (this->plt_
->output_section())
3939 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3943 // A section for huge long branch addresses, similar to plt section.
3945 template<int size
, bool big_endian
>
3946 class Output_data_brlt_powerpc
: public Output_section_data_build
3949 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3950 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3951 size
, big_endian
> Reloc_section
;
3953 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3954 Reloc_section
* brlt_rel
)
3955 : Output_section_data_build(size
== 32 ? 4 : 8),
3963 this->reset_data_size();
3964 this->rel_
->reset_data_size();
3968 finalize_brlt_sizes()
3970 this->finalize_data_size();
3971 this->rel_
->finalize_data_size();
3974 // Add a reloc for an entry in the BRLT.
3976 add_reloc(Address to
, unsigned int off
)
3977 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3979 // Update section and reloc section size.
3981 set_current_size(unsigned int num_branches
)
3983 this->reset_address_and_file_offset();
3984 this->set_current_data_size(num_branches
* 16);
3985 this->finalize_data_size();
3986 Output_section
* os
= this->output_section();
3987 os
->set_section_offsets_need_adjustment();
3988 if (this->rel_
!= NULL
)
3990 const unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
3991 this->rel_
->reset_address_and_file_offset();
3992 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3993 this->rel_
->finalize_data_size();
3994 Output_section
* os
= this->rel_
->output_section();
3995 os
->set_section_offsets_need_adjustment();
4001 do_adjust_output_section(Output_section
* os
)
4006 // Write to a map file.
4008 do_print_to_mapfile(Mapfile
* mapfile
) const
4009 { mapfile
->print_output_data(this, "** BRLT"); }
4012 // Write out the BRLT data.
4014 do_write(Output_file
*);
4016 // The reloc section.
4017 Reloc_section
* rel_
;
4018 Target_powerpc
<size
, big_endian
>* targ_
;
4021 // Make the branch lookup table section.
4023 template<int size
, bool big_endian
>
4025 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
4027 if (size
== 64 && this->brlt_section_
== NULL
)
4029 Reloc_section
* brlt_rel
= NULL
;
4030 bool is_pic
= parameters
->options().output_is_position_independent();
4033 // When PIC we can't fill in .branch_lt (like .plt it can be
4034 // a bss style section) but must initialise at runtime via
4035 // dynamic relocations.
4036 this->rela_dyn_section(layout
);
4037 brlt_rel
= new Reloc_section(false);
4038 if (this->rela_dyn_
->output_section())
4039 this->rela_dyn_
->output_section()
4040 ->add_output_section_data(brlt_rel
);
4043 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
4044 if (this->plt_
&& is_pic
&& this->plt_
->output_section())
4045 this->plt_
->output_section()
4046 ->add_output_section_data(this->brlt_section_
);
4048 layout
->add_output_section_data(".branch_lt",
4049 (is_pic
? elfcpp::SHT_NOBITS
4050 : elfcpp::SHT_PROGBITS
),
4051 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
4052 this->brlt_section_
,
4053 (is_pic
? ORDER_SMALL_BSS
4054 : ORDER_SMALL_DATA
),
4059 // Write out .branch_lt when non-PIC.
4061 template<int size
, bool big_endian
>
4063 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
4065 if (size
== 64 && !parameters
->options().output_is_position_independent())
4067 const section_size_type offset
= this->offset();
4068 const section_size_type oview_size
4069 = convert_to_section_size_type(this->data_size());
4070 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
4072 this->targ_
->write_branch_lookup_table(oview
);
4073 of
->write_output_view(offset
, oview_size
, oview
);
4077 static inline uint32_t
4083 static inline uint32_t
4089 static inline uint32_t
4092 return hi(a
+ 0x8000);
4098 static const unsigned char eh_frame_cie
[12];
4102 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
4105 'z', 'R', 0, // Augmentation string.
4106 4, // Code alignment.
4107 0x80 - size
/ 8 , // Data alignment.
4109 1, // Augmentation size.
4110 (elfcpp::DW_EH_PE_pcrel
4111 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
4112 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
4115 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
4116 static const unsigned char glink_eh_frame_fde_64v1
[] =
4118 0, 0, 0, 0, // Replaced with offset to .glink.
4119 0, 0, 0, 0, // Replaced with size of .glink.
4120 0, // Augmentation size.
4121 elfcpp::DW_CFA_advance_loc
+ 1,
4122 elfcpp::DW_CFA_register
, 65, 12,
4123 elfcpp::DW_CFA_advance_loc
+ 5,
4124 elfcpp::DW_CFA_restore_extended
, 65
4127 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
4128 static const unsigned char glink_eh_frame_fde_64v2
[] =
4130 0, 0, 0, 0, // Replaced with offset to .glink.
4131 0, 0, 0, 0, // Replaced with size of .glink.
4132 0, // Augmentation size.
4133 elfcpp::DW_CFA_advance_loc
+ 1,
4134 elfcpp::DW_CFA_register
, 65, 0,
4135 elfcpp::DW_CFA_advance_loc
+ 7,
4136 elfcpp::DW_CFA_restore_extended
, 65
4139 // Describe __glink_PLTresolve use of LR, 32-bit version.
4140 static const unsigned char glink_eh_frame_fde_32
[] =
4142 0, 0, 0, 0, // Replaced with offset to .glink.
4143 0, 0, 0, 0, // Replaced with size of .glink.
4144 0, // Augmentation size.
4145 elfcpp::DW_CFA_advance_loc
+ 2,
4146 elfcpp::DW_CFA_register
, 65, 0,
4147 elfcpp::DW_CFA_advance_loc
+ 4,
4148 elfcpp::DW_CFA_restore_extended
, 65
4151 static const unsigned char default_fde
[] =
4153 0, 0, 0, 0, // Replaced with offset to stubs.
4154 0, 0, 0, 0, // Replaced with size of stubs.
4155 0, // Augmentation size.
4156 elfcpp::DW_CFA_nop
, // Pad.
4161 template<bool big_endian
>
4163 write_insn(unsigned char* p
, uint32_t v
)
4165 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
4169 static inline unsigned int
4172 if (!parameters
->options().user_set_plt_align())
4173 return size
== 64 ? 32 : 8;
4174 return 1 << parameters
->options().plt_align();
4177 // Stub_table holds information about plt and long branch stubs.
4178 // Stubs are built in an area following some input section determined
4179 // by group_sections(). This input section is converted to a relaxed
4180 // input section allowing it to be resized to accommodate the stubs
4182 template<int size
, bool big_endian
>
4183 class Stub_table
: public Output_relaxed_input_section
4188 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4189 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4193 unsigned int indx_
: 30;
4194 unsigned int r2save_
: 1;
4195 unsigned int localentry0_
: 1;
4197 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4198 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4200 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4201 Output_section
* output_section
,
4202 const Output_section::Input_section
* owner
,
4204 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4206 ->section_addralign(owner
->shndx())),
4207 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4208 orig_data_size_(owner
->current_data_size()),
4209 plt_size_(0), last_plt_size_(0),
4210 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4211 need_save_res_(false), uniq_(id
), tls_get_addr_opt_bctrl_(-1u),
4214 this->set_output_section(output_section
);
4216 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4217 new_relaxed
.push_back(this);
4218 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4221 // Add a plt call stub.
4223 add_plt_call_entry(Address
,
4224 const Sized_relobj_file
<size
, big_endian
>*,
4231 add_plt_call_entry(Address
,
4232 const Sized_relobj_file
<size
, big_endian
>*,
4238 // Find a given plt call stub.
4240 find_plt_call_entry(const Symbol
*) const;
4243 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4244 unsigned int) const;
4247 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4253 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4258 // Add a long branch stub.
4260 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4261 unsigned int, Address
, Address
, bool);
4264 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4268 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4270 Address max_branch_offset
= max_branch_delta(r_type
);
4271 if (max_branch_offset
== 0)
4273 gold_assert(from
!= invalid_address
);
4274 Address loc
= off
+ this->stub_address();
4275 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4279 clear_stubs(bool all
)
4281 this->plt_call_stubs_
.clear();
4282 this->plt_size_
= 0;
4283 this->long_branch_stubs_
.clear();
4284 this->branch_size_
= 0;
4285 this->need_save_res_
= false;
4288 this->last_plt_size_
= 0;
4289 this->last_branch_size_
= 0;
4294 set_address_and_size(const Output_section
* os
, Address off
)
4296 Address start_off
= off
;
4297 off
+= this->orig_data_size_
;
4298 Address my_size
= this->plt_size_
+ this->branch_size_
;
4299 if (this->need_save_res_
)
4300 my_size
+= this->targ_
->savres_section()->data_size();
4302 off
= align_address(off
, this->stub_align());
4303 // Include original section size and alignment padding in size
4304 my_size
+= off
- start_off
;
4305 // Ensure new size is always larger than min size
4306 // threshold. Alignment requirement is included in "my_size", so
4307 // increase "my_size" does not invalidate alignment.
4308 if (my_size
< this->min_size_threshold_
)
4309 my_size
= this->min_size_threshold_
;
4310 this->reset_address_and_file_offset();
4311 this->set_current_data_size(my_size
);
4312 this->set_address_and_file_offset(os
->address() + start_off
,
4313 os
->offset() + start_off
);
4318 stub_address() const
4320 return align_address(this->address() + this->orig_data_size_
,
4321 this->stub_align());
4327 return align_address(this->offset() + this->orig_data_size_
,
4328 this->stub_align());
4333 { return this->plt_size_
; }
4336 set_min_size_threshold(Address min_size
)
4337 { this->min_size_threshold_
= min_size
; }
4340 define_stub_syms(Symbol_table
*);
4345 Output_section
* os
= this->output_section();
4346 if (os
->addralign() < this->stub_align())
4348 os
->set_addralign(this->stub_align());
4349 // FIXME: get rid of the insane checkpointing.
4350 // We can't increase alignment of the input section to which
4351 // stubs are attached; The input section may be .init which
4352 // is pasted together with other .init sections to form a
4353 // function. Aligning might insert zero padding resulting in
4354 // sigill. However we do need to increase alignment of the
4355 // output section so that the align_address() on offset in
4356 // set_address_and_size() adds the same padding as the
4357 // align_address() on address in stub_address().
4358 // What's more, we need this alignment for the layout done in
4359 // relaxation_loop_body() so that the output section starts at
4360 // a suitably aligned address.
4361 os
->checkpoint_set_addralign(this->stub_align());
4363 if (this->last_plt_size_
!= this->plt_size_
4364 || this->last_branch_size_
!= this->branch_size_
)
4366 this->last_plt_size_
= this->plt_size_
;
4367 this->last_branch_size_
= this->branch_size_
;
4373 // Generate a suitable FDE to describe code in this stub group.
4377 // Add .eh_frame info for this stub section.
4379 add_eh_frame(Layout
* layout
);
4381 // Remove .eh_frame info for this stub section.
4383 remove_eh_frame(Layout
* layout
);
4385 Target_powerpc
<size
, big_endian
>*
4391 class Plt_stub_key_hash
;
4392 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4393 Plt_stub_key_hash
> Plt_stub_entries
;
4394 class Branch_stub_ent
;
4395 class Branch_stub_ent_hash
;
4396 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4397 Branch_stub_ent_hash
> Branch_stub_entries
;
4399 // Alignment of stub section.
4403 unsigned int min_align
= size
== 64 ? 32 : 16;
4404 unsigned int user_align
= 1 << parameters
->options().plt_align();
4405 return std::max(user_align
, min_align
);
4408 // Return the plt offset for the given call stub.
4410 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4412 const Symbol
* gsym
= p
->first
.sym_
;
4415 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4416 && gsym
->can_use_relative_reloc(false));
4417 return gsym
->plt_offset();
4422 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4423 unsigned int local_sym_index
= p
->first
.locsym_
;
4424 return relobj
->local_plt_offset(local_sym_index
);
4428 // Size of a given plt call stub.
4430 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4434 const Symbol
* gsym
= p
->first
.sym_
;
4436 + (this->targ_
->is_tls_get_addr_opt(gsym
) ? 8 * 4 : 0));
4440 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4442 plt_addr
+= this->targ_
->iplt_section()->address();
4444 plt_addr
+= this->targ_
->plt_section()->address();
4445 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4446 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4447 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4448 got_addr
+= ppcobj
->toc_base_offset();
4449 Address off
= plt_addr
- got_addr
;
4450 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4451 const Symbol
* gsym
= p
->first
.sym_
;
4452 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4454 if (this->targ_
->abiversion() < 2)
4456 bool static_chain
= parameters
->options().plt_static_chain();
4457 bool thread_safe
= this->targ_
->plt_thread_safe();
4461 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4467 plt_call_align(unsigned int bytes
) const
4469 unsigned int align
= param_plt_align
<size
>();
4470 return (bytes
+ align
- 1) & -align
;
4473 // Return long branch stub size.
4475 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4477 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4478 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4480 unsigned int bytes
= 16;
4481 if (size
== 32 && parameters
->options().output_is_position_independent())
4488 do_write(Output_file
*);
4490 // Plt call stub keys.
4494 Plt_stub_key(const Symbol
* sym
)
4495 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4498 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4499 unsigned int locsym_index
)
4500 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4503 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4505 unsigned int r_type
,
4507 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4510 this->addend_
= addend
;
4511 else if (parameters
->options().output_is_position_independent()
4512 && r_type
== elfcpp::R_PPC_PLTREL24
)
4514 this->addend_
= addend
;
4515 if (this->addend_
>= 32768)
4516 this->object_
= object
;
4520 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4521 unsigned int locsym_index
,
4522 unsigned int r_type
,
4524 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4527 this->addend_
= addend
;
4528 else if (parameters
->options().output_is_position_independent()
4529 && r_type
== elfcpp::R_PPC_PLTREL24
)
4530 this->addend_
= addend
;
4533 bool operator==(const Plt_stub_key
& that
) const
4535 return (this->sym_
== that
.sym_
4536 && this->object_
== that
.object_
4537 && this->addend_
== that
.addend_
4538 && this->locsym_
== that
.locsym_
);
4542 const Sized_relobj_file
<size
, big_endian
>* object_
;
4543 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4544 unsigned int locsym_
;
4547 class Plt_stub_key_hash
4550 size_t operator()(const Plt_stub_key
& ent
) const
4552 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4553 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4559 // Long branch stub keys.
4560 class Branch_stub_ent
4563 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4564 Address to
, bool save_res
)
4565 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4568 toc_base_off_
= obj
->toc_base_offset();
4571 bool operator==(const Branch_stub_ent
& that
) const
4573 return (this->dest_
== that
.dest_
4575 || this->toc_base_off_
== that
.toc_base_off_
));
4579 unsigned int toc_base_off_
;
4583 class Branch_stub_ent_hash
4586 size_t operator()(const Branch_stub_ent
& ent
) const
4587 { return ent
.dest_
^ ent
.toc_base_off_
; }
4590 // In a sane world this would be a global.
4591 Target_powerpc
<size
, big_endian
>* targ_
;
4592 // Map sym/object/addend to stub offset.
4593 Plt_stub_entries plt_call_stubs_
;
4594 // Map destination address to stub offset.
4595 Branch_stub_entries long_branch_stubs_
;
4596 // size of input section
4597 section_size_type orig_data_size_
;
4599 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4600 // Some rare cases cause (PR/20529) fluctuation in stub table
4601 // size, which leads to an endless relax loop. This is to be fixed
4602 // by, after the first few iterations, allowing only increase of
4603 // stub table size. This variable sets the minimal possible size of
4604 // a stub table, it is zero for the first few iterations, then
4605 // increases monotonically.
4606 Address min_size_threshold_
;
4607 // Set if this stub group needs a copy of out-of-line register
4608 // save/restore functions.
4609 bool need_save_res_
;
4610 // Per stub table unique identifier.
4612 // The bctrl in the __tls_get_addr_opt stub, if present.
4613 unsigned int tls_get_addr_opt_bctrl_
;
4614 // FDE unwind info for this stub group.
4615 unsigned int plt_fde_len_
;
4616 unsigned char plt_fde_
[20];
4619 // Add a plt call stub, if we do not already have one for this
4620 // sym/object/addend combo.
4622 template<int size
, bool big_endian
>
4624 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4626 const Sized_relobj_file
<size
, big_endian
>* object
,
4628 unsigned int r_type
,
4632 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4633 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4634 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4635 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4638 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4640 && this->targ_
->is_elfv2_localentry0(gsym
))
4642 p
.first
->second
.localentry0_
= 1;
4643 this->targ_
->set_has_localentry0();
4645 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4647 this->targ_
->set_has_tls_get_addr_opt();
4648 this->tls_get_addr_opt_bctrl_
= this->plt_size_
- 5 * 4;
4650 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4654 && !p
.first
->second
.localentry0_
)
4655 p
.first
->second
.r2save_
= 1;
4656 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4659 template<int size
, bool big_endian
>
4661 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4663 const Sized_relobj_file
<size
, big_endian
>* object
,
4664 unsigned int locsym_index
,
4665 unsigned int r_type
,
4669 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4670 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4671 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4672 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4675 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4676 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4678 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4680 p
.first
->second
.localentry0_
= 1;
4681 this->targ_
->set_has_localentry0();
4686 && !p
.first
->second
.localentry0_
)
4687 p
.first
->second
.r2save_
= 1;
4688 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4691 // Find a plt call stub.
4693 template<int size
, bool big_endian
>
4694 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4695 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4696 const Sized_relobj_file
<size
, big_endian
>* object
,
4698 unsigned int r_type
,
4699 Address addend
) const
4701 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4702 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4703 if (p
== this->plt_call_stubs_
.end())
4708 template<int size
, bool big_endian
>
4709 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4710 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4712 Plt_stub_key
key(gsym
);
4713 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4714 if (p
== this->plt_call_stubs_
.end())
4719 template<int size
, bool big_endian
>
4720 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4721 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4722 const Sized_relobj_file
<size
, big_endian
>* object
,
4723 unsigned int locsym_index
,
4724 unsigned int r_type
,
4725 Address addend
) const
4727 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4728 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4729 if (p
== this->plt_call_stubs_
.end())
4734 template<int size
, bool big_endian
>
4735 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4736 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4737 const Sized_relobj_file
<size
, big_endian
>* object
,
4738 unsigned int locsym_index
) const
4740 Plt_stub_key
key(object
, locsym_index
);
4741 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4742 if (p
== this->plt_call_stubs_
.end())
4747 // Add a long branch stub if we don't already have one to given
4750 template<int size
, bool big_endian
>
4752 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4753 const Powerpc_relobj
<size
, big_endian
>* object
,
4754 unsigned int r_type
,
4759 Branch_stub_ent
ent(object
, to
, save_res
);
4760 Address off
= this->branch_size_
;
4761 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
4762 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
4766 this->need_save_res_
= true;
4769 unsigned int stub_size
= this->branch_stub_size(p
.first
);
4770 this->branch_size_
= off
+ stub_size
;
4771 if (size
== 64 && stub_size
!= 4)
4772 this->targ_
->add_branch_lookup_table(to
);
4775 return this->can_reach_stub(from
, off
, r_type
);
4778 // Find long branch stub offset.
4780 template<int size
, bool big_endian
>
4781 typename Stub_table
<size
, big_endian
>::Address
4782 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4783 const Powerpc_relobj
<size
, big_endian
>* object
,
4786 Branch_stub_ent
ent(object
, to
, false);
4787 typename
Branch_stub_entries::const_iterator p
4788 = this->long_branch_stubs_
.find(ent
);
4789 if (p
== this->long_branch_stubs_
.end())
4790 return invalid_address
;
4791 if (p
->first
.save_res_
)
4792 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4796 // Generate a suitable FDE to describe code in this stub group.
4797 // The __tls_get_addr_opt call stub needs to describe where it saves
4798 // LR, to support exceptions that might be thrown from __tls_get_addr.
4800 template<int size
, bool big_endian
>
4802 Stub_table
<size
, big_endian
>::init_plt_fde()
4804 unsigned char* p
= this->plt_fde_
;
4805 // offset pcrel sdata4, size udata4, and augmentation size byte.
4808 if (this->tls_get_addr_opt_bctrl_
!= -1u)
4810 unsigned int to_bctrl
= this->tls_get_addr_opt_bctrl_
/ 4;
4812 *p
++ = elfcpp::DW_CFA_advance_loc
+ to_bctrl
;
4813 else if (to_bctrl
< 256)
4815 *p
++ = elfcpp::DW_CFA_advance_loc1
;
4818 else if (to_bctrl
< 65536)
4820 *p
++ = elfcpp::DW_CFA_advance_loc2
;
4821 elfcpp::Swap
<16, big_endian
>::writeval(p
, to_bctrl
);
4826 *p
++ = elfcpp::DW_CFA_advance_loc4
;
4827 elfcpp::Swap
<32, big_endian
>::writeval(p
, to_bctrl
);
4830 *p
++ = elfcpp::DW_CFA_offset_extended_sf
;
4832 *p
++ = -(this->targ_
->stk_linker() / 8) & 0x7f;
4833 *p
++ = elfcpp::DW_CFA_advance_loc
+ 4;
4834 *p
++ = elfcpp::DW_CFA_restore_extended
;
4837 this->plt_fde_len_
= p
- this->plt_fde_
;
4840 // Add .eh_frame info for this stub section. Unlike other linker
4841 // generated .eh_frame this is added late in the link, because we
4842 // only want the .eh_frame info if this particular stub section is
4845 template<int size
, bool big_endian
>
4847 Stub_table
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4849 if (!parameters
->options().ld_generated_unwind_info())
4852 // Since we add stub .eh_frame info late, it must be placed
4853 // after all other linker generated .eh_frame info so that
4854 // merge mapping need not be updated for input sections.
4855 // There is no provision to use a different CIE to that used
4857 if (!this->targ_
->has_glink())
4860 if (this->plt_size_
+ this->branch_size_
+ this->need_save_res_
== 0)
4863 this->init_plt_fde();
4864 layout
->add_eh_frame_for_plt(this,
4865 Eh_cie
<size
>::eh_frame_cie
,
4866 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4867 this->plt_fde_
, this->plt_fde_len_
);
4870 template<int size
, bool big_endian
>
4872 Stub_table
<size
, big_endian
>::remove_eh_frame(Layout
* layout
)
4874 if (this->plt_fde_len_
!= 0)
4876 layout
->remove_eh_frame_for_plt(this,
4877 Eh_cie
<size
>::eh_frame_cie
,
4878 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4879 this->plt_fde_
, this->plt_fde_len_
);
4880 this->plt_fde_len_
= 0;
4884 // A class to handle .glink.
4886 template<int size
, bool big_endian
>
4887 class Output_data_glink
: public Output_section_data
4890 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4891 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4893 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4894 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4895 end_branch_table_(), ge_size_(0)
4899 add_eh_frame(Layout
* layout
);
4902 add_global_entry(const Symbol
*);
4905 find_global_entry(const Symbol
*) const;
4908 global_entry_align(unsigned int off
) const
4910 unsigned int align
= param_plt_align
<size
>();
4911 return (off
+ align
- 1) & -align
;
4915 global_entry_off() const
4917 return this->global_entry_align(this->end_branch_table_
);
4921 global_entry_address() const
4923 gold_assert(this->is_data_size_valid());
4924 return this->address() + this->global_entry_off();
4928 pltresolve_size() const
4932 + (this->targ_
->abiversion() < 2 ? 11 * 4 : 14 * 4));
4937 // Write to a map file.
4939 do_print_to_mapfile(Mapfile
* mapfile
) const
4940 { mapfile
->print_output_data(this, _("** glink")); }
4944 set_final_data_size();
4948 do_write(Output_file
*);
4950 // Allows access to .got and .plt for do_write.
4951 Target_powerpc
<size
, big_endian
>* targ_
;
4953 // Map sym to stub offset.
4954 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4955 Global_entry_stub_entries global_entry_stubs_
;
4957 unsigned int end_branch_table_
, ge_size_
;
4960 template<int size
, bool big_endian
>
4962 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4964 if (!parameters
->options().ld_generated_unwind_info())
4969 if (this->targ_
->abiversion() < 2)
4970 layout
->add_eh_frame_for_plt(this,
4971 Eh_cie
<64>::eh_frame_cie
,
4972 sizeof (Eh_cie
<64>::eh_frame_cie
),
4973 glink_eh_frame_fde_64v1
,
4974 sizeof (glink_eh_frame_fde_64v1
));
4976 layout
->add_eh_frame_for_plt(this,
4977 Eh_cie
<64>::eh_frame_cie
,
4978 sizeof (Eh_cie
<64>::eh_frame_cie
),
4979 glink_eh_frame_fde_64v2
,
4980 sizeof (glink_eh_frame_fde_64v2
));
4984 // 32-bit .glink can use the default since the CIE return
4985 // address reg, LR, is valid.
4986 layout
->add_eh_frame_for_plt(this,
4987 Eh_cie
<32>::eh_frame_cie
,
4988 sizeof (Eh_cie
<32>::eh_frame_cie
),
4990 sizeof (default_fde
));
4991 // Except where LR is used in a PIC __glink_PLTresolve.
4992 if (parameters
->options().output_is_position_independent())
4993 layout
->add_eh_frame_for_plt(this,
4994 Eh_cie
<32>::eh_frame_cie
,
4995 sizeof (Eh_cie
<32>::eh_frame_cie
),
4996 glink_eh_frame_fde_32
,
4997 sizeof (glink_eh_frame_fde_32
));
5001 template<int size
, bool big_endian
>
5003 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
5005 unsigned int off
= this->global_entry_align(this->ge_size_
);
5006 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
5007 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, off
));
5009 this->ge_size_
= off
+ 16;
5012 template<int size
, bool big_endian
>
5013 typename Output_data_glink
<size
, big_endian
>::Address
5014 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
5016 typename
Global_entry_stub_entries::const_iterator p
5017 = this->global_entry_stubs_
.find(gsym
);
5018 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
5021 template<int size
, bool big_endian
>
5023 Output_data_glink
<size
, big_endian
>::set_final_data_size()
5025 unsigned int count
= this->targ_
->plt_entry_count();
5026 section_size_type total
= 0;
5032 // space for branch table
5033 total
+= 4 * (count
- 1);
5035 total
+= -total
& 15;
5036 total
+= this->pltresolve_size();
5040 total
+= this->pltresolve_size();
5042 // space for branch table
5044 if (this->targ_
->abiversion() < 2)
5048 total
+= 4 * (count
- 0x8000);
5052 this->end_branch_table_
= total
;
5053 total
= this->global_entry_align(total
);
5054 total
+= this->ge_size_
;
5056 this->set_data_size(total
);
5059 // Define symbols on stubs, identifying the stub.
5061 template<int size
, bool big_endian
>
5063 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
5065 if (!this->plt_call_stubs_
.empty())
5067 // The key for the plt call stub hash table includes addresses,
5068 // therefore traversal order depends on those addresses, which
5069 // can change between runs if gold is a PIE. Unfortunately the
5070 // output .symtab ordering depends on the order in which symbols
5071 // are added to the linker symtab. We want reproducible output
5072 // so must sort the call stub symbols.
5073 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
5074 std::vector
<plt_iter
> sorted
;
5075 sorted
.resize(this->plt_call_stubs_
.size());
5077 for (plt_iter cs
= this->plt_call_stubs_
.begin();
5078 cs
!= this->plt_call_stubs_
.end();
5080 sorted
[cs
->second
.indx_
] = cs
;
5082 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
5084 plt_iter cs
= sorted
[i
];
5087 if (cs
->first
.addend_
!= 0)
5088 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
5091 if (cs
->first
.object_
)
5093 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5094 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5095 sprintf(obj
, "%x:", ppcobj
->uniq());
5098 const char *symname
;
5099 if (cs
->first
.sym_
== NULL
)
5101 sprintf(localname
, "%x", cs
->first
.locsym_
);
5102 symname
= localname
;
5104 else if (this->targ_
->is_tls_get_addr_opt(cs
->first
.sym_
))
5105 symname
= this->targ_
->tls_get_addr_opt()->name();
5107 symname
= cs
->first
.sym_
->name();
5108 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
5109 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
5111 = this->stub_address() - this->address() + cs
->second
.off_
;
5112 unsigned int stub_size
= this->plt_call_align(this->plt_call_size(cs
));
5113 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5117 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
5118 for (branch_iter bs
= this->long_branch_stubs_
.begin();
5119 bs
!= this->long_branch_stubs_
.end();
5122 if (bs
->first
.save_res_
)
5125 char* name
= new char[8 + 13 + 16 + 1];
5126 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
5127 static_cast<unsigned long long>(bs
->first
.dest_
));
5128 Address value
= (this->stub_address() - this->address()
5129 + this->plt_size_
+ bs
->second
);
5130 unsigned int stub_size
= this->branch_stub_size(bs
);
5131 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5135 // Write out plt and long branch stub code.
5137 template<int size
, bool big_endian
>
5139 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
5141 if (this->plt_call_stubs_
.empty()
5142 && this->long_branch_stubs_
.empty())
5145 const section_size_type start_off
= this->offset();
5146 const section_size_type off
= this->stub_offset();
5147 const section_size_type oview_size
=
5148 convert_to_section_size_type(this->data_size() - (off
- start_off
));
5149 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5154 const Output_data_got_powerpc
<size
, big_endian
>* got
5155 = this->targ_
->got_section();
5156 Address got_os_addr
= got
->output_section()->address();
5158 if (!this->plt_call_stubs_
.empty())
5160 // The base address of the .plt section.
5161 Address plt_base
= this->targ_
->plt_section()->address();
5162 Address iplt_base
= invalid_address
;
5164 // Write out plt call stubs.
5165 typename
Plt_stub_entries::const_iterator cs
;
5166 for (cs
= this->plt_call_stubs_
.begin();
5167 cs
!= this->plt_call_stubs_
.end();
5171 Address pltoff
= this->plt_off(cs
, &is_iplt
);
5172 Address plt_addr
= pltoff
;
5175 if (iplt_base
== invalid_address
)
5176 iplt_base
= this->targ_
->iplt_section()->address();
5177 plt_addr
+= iplt_base
;
5180 plt_addr
+= plt_base
;
5181 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5182 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5183 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
5184 Address off
= plt_addr
- got_addr
;
5186 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
5187 gold_error(_("%s: linkage table error against `%s'"),
5188 cs
->first
.object_
->name().c_str(),
5189 cs
->first
.sym_
->demangled_name().c_str());
5191 bool plt_load_toc
= this->targ_
->abiversion() < 2;
5193 = plt_load_toc
&& parameters
->options().plt_static_chain();
5195 = plt_load_toc
&& this->targ_
->plt_thread_safe();
5196 bool use_fake_dep
= false;
5197 Address cmp_branch_off
= 0;
5200 unsigned int pltindex
5201 = ((pltoff
- this->targ_
->first_plt_entry_offset())
5202 / this->targ_
->plt_entry_size());
5204 = (this->targ_
->glink_section()->pltresolve_size()
5206 if (pltindex
> 32768)
5207 glinkoff
+= (pltindex
- 32768) * 4;
5209 = this->targ_
->glink_section()->address() + glinkoff
;
5211 = (this->stub_address() + cs
->second
.off_
+ 20
5212 + 4 * cs
->second
.r2save_
5213 + 4 * (ha(off
) != 0)
5214 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5215 + 4 * static_chain
);
5216 cmp_branch_off
= to
- from
;
5217 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
5220 p
= oview
+ cs
->second
.off_
;
5221 const Symbol
* gsym
= cs
->first
.sym_
;
5222 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5224 write_insn
<big_endian
>(p
, ld_11_3
+ 0);
5226 write_insn
<big_endian
>(p
, ld_12_3
+ 8);
5228 write_insn
<big_endian
>(p
, mr_0_3
);
5230 write_insn
<big_endian
>(p
, cmpdi_11_0
);
5232 write_insn
<big_endian
>(p
, add_3_12_13
);
5234 write_insn
<big_endian
>(p
, beqlr
);
5236 write_insn
<big_endian
>(p
, mr_3_0
);
5238 if (!cs
->second
.localentry0_
)
5240 write_insn
<big_endian
>(p
, mflr_11
);
5242 write_insn
<big_endian
>(p
, (std_11_1
5243 + this->targ_
->stk_linker()));
5246 use_fake_dep
= thread_safe
;
5250 if (cs
->second
.r2save_
)
5252 write_insn
<big_endian
>(p
,
5253 std_2_1
+ this->targ_
->stk_toc());
5258 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
5260 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
5265 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
5267 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
5271 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5273 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
5277 write_insn
<big_endian
>(p
, mtctr_12
);
5283 write_insn
<big_endian
>(p
, xor_2_12_12
);
5285 write_insn
<big_endian
>(p
, add_11_11_2
);
5288 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5292 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5299 if (cs
->second
.r2save_
)
5301 write_insn
<big_endian
>(p
,
5302 std_2_1
+ this->targ_
->stk_toc());
5305 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5308 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5310 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5314 write_insn
<big_endian
>(p
, mtctr_12
);
5320 write_insn
<big_endian
>(p
, xor_11_12_12
);
5322 write_insn
<big_endian
>(p
, add_2_2_11
);
5327 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5330 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5334 if (!cs
->second
.localentry0_
5335 && this->targ_
->is_tls_get_addr_opt(gsym
))
5337 write_insn
<big_endian
>(p
, bctrl
);
5339 write_insn
<big_endian
>(p
, ld_2_1
+ this->targ_
->stk_toc());
5341 write_insn
<big_endian
>(p
, ld_11_1
+ this->targ_
->stk_linker());
5343 write_insn
<big_endian
>(p
, mtlr_11
);
5345 write_insn
<big_endian
>(p
, blr
);
5347 else if (thread_safe
&& !use_fake_dep
)
5349 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5351 write_insn
<big_endian
>(p
, bnectr_p4
);
5353 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5356 write_insn
<big_endian
>(p
, bctr
);
5360 // Write out long branch stubs.
5361 typename
Branch_stub_entries::const_iterator bs
;
5362 for (bs
= this->long_branch_stubs_
.begin();
5363 bs
!= this->long_branch_stubs_
.end();
5366 if (bs
->first
.save_res_
)
5368 p
= oview
+ this->plt_size_
+ bs
->second
;
5369 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5370 Address delta
= bs
->first
.dest_
- loc
;
5371 if (delta
+ (1 << 25) < 2 << 25)
5372 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5376 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5377 gold_assert(brlt_addr
!= invalid_address
);
5378 brlt_addr
+= this->targ_
->brlt_section()->address();
5379 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5380 Address brltoff
= brlt_addr
- got_addr
;
5381 if (ha(brltoff
) == 0)
5383 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5387 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5388 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5390 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5391 write_insn
<big_endian
>(p
, bctr
);
5397 if (!this->plt_call_stubs_
.empty())
5399 // The base address of the .plt section.
5400 Address plt_base
= this->targ_
->plt_section()->address();
5401 Address iplt_base
= invalid_address
;
5402 // The address of _GLOBAL_OFFSET_TABLE_.
5403 Address g_o_t
= invalid_address
;
5405 // Write out plt call stubs.
5406 typename
Plt_stub_entries::const_iterator cs
;
5407 for (cs
= this->plt_call_stubs_
.begin();
5408 cs
!= this->plt_call_stubs_
.end();
5412 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
5415 if (iplt_base
== invalid_address
)
5416 iplt_base
= this->targ_
->iplt_section()->address();
5417 plt_addr
+= iplt_base
;
5420 plt_addr
+= plt_base
;
5422 p
= oview
+ cs
->second
.off_
;
5423 const Symbol
* gsym
= cs
->first
.sym_
;
5424 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5426 write_insn
<big_endian
>(p
, lwz_11_3
+ 0);
5428 write_insn
<big_endian
>(p
, lwz_12_3
+ 4);
5430 write_insn
<big_endian
>(p
, mr_0_3
);
5432 write_insn
<big_endian
>(p
, cmpwi_11_0
);
5434 write_insn
<big_endian
>(p
, add_3_12_2
);
5436 write_insn
<big_endian
>(p
, beqlr
);
5438 write_insn
<big_endian
>(p
, mr_3_0
);
5440 write_insn
<big_endian
>(p
, nop
);
5443 if (parameters
->options().output_is_position_independent())
5446 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5447 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5448 (cs
->first
.object_
));
5449 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5451 unsigned int got2
= ppcobj
->got2_shndx();
5452 got_addr
= ppcobj
->get_output_section_offset(got2
);
5453 gold_assert(got_addr
!= invalid_address
);
5454 got_addr
+= (ppcobj
->output_section(got2
)->address()
5455 + cs
->first
.addend_
);
5459 if (g_o_t
== invalid_address
)
5461 const Output_data_got_powerpc
<size
, big_endian
>* got
5462 = this->targ_
->got_section();
5463 g_o_t
= got
->address() + got
->g_o_t();
5468 Address off
= plt_addr
- got_addr
;
5470 write_insn
<big_endian
>(p
, lwz_11_30
+ l(off
));
5473 write_insn
<big_endian
>(p
, addis_11_30
+ ha(off
));
5475 write_insn
<big_endian
>(p
, lwz_11_11
+ l(off
));
5480 write_insn
<big_endian
>(p
, lis_11
+ ha(plt_addr
));
5482 write_insn
<big_endian
>(p
, lwz_11_11
+ l(plt_addr
));
5485 write_insn
<big_endian
>(p
, mtctr_11
);
5487 write_insn
<big_endian
>(p
, bctr
);
5491 // Write out long branch stubs.
5492 typename
Branch_stub_entries::const_iterator bs
;
5493 for (bs
= this->long_branch_stubs_
.begin();
5494 bs
!= this->long_branch_stubs_
.end();
5497 if (bs
->first
.save_res_
)
5499 p
= oview
+ this->plt_size_
+ bs
->second
;
5500 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5501 Address delta
= bs
->first
.dest_
- loc
;
5502 if (delta
+ (1 << 25) < 2 << 25)
5503 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5504 else if (!parameters
->options().output_is_position_independent())
5506 write_insn
<big_endian
>(p
, lis_12
+ ha(bs
->first
.dest_
));
5508 write_insn
<big_endian
>(p
, addi_12_12
+ l(bs
->first
.dest_
));
5513 write_insn
<big_endian
>(p
, mflr_0
);
5515 write_insn
<big_endian
>(p
, bcl_20_31
);
5517 write_insn
<big_endian
>(p
, mflr_12
);
5519 write_insn
<big_endian
>(p
, addis_12_12
+ ha(delta
));
5521 write_insn
<big_endian
>(p
, addi_12_12
+ l(delta
));
5523 write_insn
<big_endian
>(p
, mtlr_0
);
5526 write_insn
<big_endian
>(p
, mtctr_12
);
5528 write_insn
<big_endian
>(p
, bctr
);
5531 if (this->need_save_res_
)
5533 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5534 memcpy (p
, this->targ_
->savres_section()->contents(),
5535 this->targ_
->savres_section()->data_size());
5539 // Write out .glink.
5541 template<int size
, bool big_endian
>
5543 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5545 const section_size_type off
= this->offset();
5546 const section_size_type oview_size
=
5547 convert_to_section_size_type(this->data_size());
5548 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5551 // The base address of the .plt section.
5552 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5553 Address plt_base
= this->targ_
->plt_section()->address();
5557 if (this->end_branch_table_
!= 0)
5559 // Write pltresolve stub.
5561 Address after_bcl
= this->address() + 16;
5562 Address pltoff
= plt_base
- after_bcl
;
5564 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5566 if (this->targ_
->abiversion() < 2)
5568 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5569 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5570 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5571 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5572 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5573 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5574 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5575 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5576 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5577 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5581 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5582 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5583 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5584 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5585 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5586 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5587 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5588 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5589 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5590 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5591 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5592 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5593 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5595 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5596 gold_assert(p
== oview
+ this->pltresolve_size());
5598 // Write lazy link call stubs.
5600 while (p
< oview
+ this->end_branch_table_
)
5602 if (this->targ_
->abiversion() < 2)
5606 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5610 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5611 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5614 uint32_t branch_off
= 8 - (p
- oview
);
5615 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5620 Address plt_base
= this->targ_
->plt_section()->address();
5621 Address iplt_base
= invalid_address
;
5622 unsigned int global_entry_off
= this->global_entry_off();
5623 Address global_entry_base
= this->address() + global_entry_off
;
5624 typename
Global_entry_stub_entries::const_iterator ge
;
5625 for (ge
= this->global_entry_stubs_
.begin();
5626 ge
!= this->global_entry_stubs_
.end();
5629 p
= oview
+ global_entry_off
+ ge
->second
;
5630 Address plt_addr
= ge
->first
->plt_offset();
5631 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5632 && ge
->first
->can_use_relative_reloc(false))
5634 if (iplt_base
== invalid_address
)
5635 iplt_base
= this->targ_
->iplt_section()->address();
5636 plt_addr
+= iplt_base
;
5639 plt_addr
+= plt_base
;
5640 Address my_addr
= global_entry_base
+ ge
->second
;
5641 Address off
= plt_addr
- my_addr
;
5643 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5644 gold_error(_("%s: linkage table error against `%s'"),
5645 ge
->first
->object()->name().c_str(),
5646 ge
->first
->demangled_name().c_str());
5648 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5649 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5650 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5651 write_insn
<big_endian
>(p
, bctr
);
5656 const Output_data_got_powerpc
<size
, big_endian
>* got
5657 = this->targ_
->got_section();
5658 // The address of _GLOBAL_OFFSET_TABLE_.
5659 Address g_o_t
= got
->address() + got
->g_o_t();
5661 // Write out pltresolve branch table.
5663 unsigned int the_end
= oview_size
- this->pltresolve_size();
5664 unsigned char* end_p
= oview
+ the_end
;
5665 while (p
< end_p
- 8 * 4)
5666 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5668 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5670 // Write out pltresolve call stub.
5671 end_p
= oview
+ oview_size
;
5672 if (parameters
->options().output_is_position_independent())
5674 Address res0_off
= 0;
5675 Address after_bcl_off
= the_end
+ 12;
5676 Address bcl_res0
= after_bcl_off
- res0_off
;
5678 write_insn
<big_endian
>(p
, addis_11_11
+ ha(bcl_res0
));
5680 write_insn
<big_endian
>(p
, mflr_0
);
5682 write_insn
<big_endian
>(p
, bcl_20_31
);
5684 write_insn
<big_endian
>(p
, addi_11_11
+ l(bcl_res0
));
5686 write_insn
<big_endian
>(p
, mflr_12
);
5688 write_insn
<big_endian
>(p
, mtlr_0
);
5690 write_insn
<big_endian
>(p
, sub_11_11_12
);
5693 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5695 write_insn
<big_endian
>(p
, addis_12_12
+ ha(got_bcl
));
5697 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5699 write_insn
<big_endian
>(p
, lwz_0_12
+ l(got_bcl
));
5701 write_insn
<big_endian
>(p
, lwz_12_12
+ l(got_bcl
+ 4));
5705 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(got_bcl
));
5707 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5710 write_insn
<big_endian
>(p
, mtctr_0
);
5712 write_insn
<big_endian
>(p
, add_0_11_11
);
5714 write_insn
<big_endian
>(p
, add_11_0_11
);
5718 Address res0
= this->address();
5720 write_insn
<big_endian
>(p
, lis_12
+ ha(g_o_t
+ 4));
5722 write_insn
<big_endian
>(p
, addis_11_11
+ ha(-res0
));
5724 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5725 write_insn
<big_endian
>(p
, lwz_0_12
+ l(g_o_t
+ 4));
5727 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(g_o_t
+ 4));
5729 write_insn
<big_endian
>(p
, addi_11_11
+ l(-res0
));
5731 write_insn
<big_endian
>(p
, mtctr_0
);
5733 write_insn
<big_endian
>(p
, add_0_11_11
);
5735 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5736 write_insn
<big_endian
>(p
, lwz_12_12
+ l(g_o_t
+ 8));
5738 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5740 write_insn
<big_endian
>(p
, add_11_0_11
);
5743 write_insn
<big_endian
>(p
, bctr
);
5747 write_insn
<big_endian
>(p
, nop
);
5752 of
->write_output_view(off
, oview_size
, oview
);
5756 // A class to handle linker generated save/restore functions.
5758 template<int size
, bool big_endian
>
5759 class Output_data_save_res
: public Output_section_data_build
5762 Output_data_save_res(Symbol_table
* symtab
);
5764 const unsigned char*
5771 // Write to a map file.
5773 do_print_to_mapfile(Mapfile
* mapfile
) const
5774 { mapfile
->print_output_data(this, _("** save/restore")); }
5777 do_write(Output_file
*);
5780 // The maximum size of save/restore contents.
5781 static const unsigned int savres_max
= 218*4;
5784 savres_define(Symbol_table
* symtab
,
5786 unsigned int lo
, unsigned int hi
,
5787 unsigned char* write_ent(unsigned char*, int),
5788 unsigned char* write_tail(unsigned char*, int));
5790 unsigned char *contents_
;
5793 template<bool big_endian
>
5794 static unsigned char*
5795 savegpr0(unsigned char* p
, int r
)
5797 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5798 write_insn
<big_endian
>(p
, insn
);
5802 template<bool big_endian
>
5803 static unsigned char*
5804 savegpr0_tail(unsigned char* p
, int r
)
5806 p
= savegpr0
<big_endian
>(p
, r
);
5807 uint32_t insn
= std_0_1
+ 16;
5808 write_insn
<big_endian
>(p
, insn
);
5810 write_insn
<big_endian
>(p
, blr
);
5814 template<bool big_endian
>
5815 static unsigned char*
5816 restgpr0(unsigned char* p
, int r
)
5818 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5819 write_insn
<big_endian
>(p
, insn
);
5823 template<bool big_endian
>
5824 static unsigned char*
5825 restgpr0_tail(unsigned char* p
, int r
)
5827 uint32_t insn
= ld_0_1
+ 16;
5828 write_insn
<big_endian
>(p
, insn
);
5830 p
= restgpr0
<big_endian
>(p
, r
);
5831 write_insn
<big_endian
>(p
, mtlr_0
);
5835 p
= restgpr0
<big_endian
>(p
, 30);
5836 p
= restgpr0
<big_endian
>(p
, 31);
5838 write_insn
<big_endian
>(p
, blr
);
5842 template<bool big_endian
>
5843 static unsigned char*
5844 savegpr1(unsigned char* p
, int r
)
5846 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5847 write_insn
<big_endian
>(p
, insn
);
5851 template<bool big_endian
>
5852 static unsigned char*
5853 savegpr1_tail(unsigned char* p
, int r
)
5855 p
= savegpr1
<big_endian
>(p
, r
);
5856 write_insn
<big_endian
>(p
, blr
);
5860 template<bool big_endian
>
5861 static unsigned char*
5862 restgpr1(unsigned char* p
, int r
)
5864 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5865 write_insn
<big_endian
>(p
, insn
);
5869 template<bool big_endian
>
5870 static unsigned char*
5871 restgpr1_tail(unsigned char* p
, int r
)
5873 p
= restgpr1
<big_endian
>(p
, r
);
5874 write_insn
<big_endian
>(p
, blr
);
5878 template<bool big_endian
>
5879 static unsigned char*
5880 savefpr(unsigned char* p
, int r
)
5882 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5883 write_insn
<big_endian
>(p
, insn
);
5887 template<bool big_endian
>
5888 static unsigned char*
5889 savefpr0_tail(unsigned char* p
, int r
)
5891 p
= savefpr
<big_endian
>(p
, r
);
5892 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5894 write_insn
<big_endian
>(p
, blr
);
5898 template<bool big_endian
>
5899 static unsigned char*
5900 restfpr(unsigned char* p
, int r
)
5902 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5903 write_insn
<big_endian
>(p
, insn
);
5907 template<bool big_endian
>
5908 static unsigned char*
5909 restfpr0_tail(unsigned char* p
, int r
)
5911 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5913 p
= restfpr
<big_endian
>(p
, r
);
5914 write_insn
<big_endian
>(p
, mtlr_0
);
5918 p
= restfpr
<big_endian
>(p
, 30);
5919 p
= restfpr
<big_endian
>(p
, 31);
5921 write_insn
<big_endian
>(p
, blr
);
5925 template<bool big_endian
>
5926 static unsigned char*
5927 savefpr1_tail(unsigned char* p
, int r
)
5929 p
= savefpr
<big_endian
>(p
, r
);
5930 write_insn
<big_endian
>(p
, blr
);
5934 template<bool big_endian
>
5935 static unsigned char*
5936 restfpr1_tail(unsigned char* p
, int r
)
5938 p
= restfpr
<big_endian
>(p
, r
);
5939 write_insn
<big_endian
>(p
, blr
);
5943 template<bool big_endian
>
5944 static unsigned char*
5945 savevr(unsigned char* p
, int r
)
5947 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5948 write_insn
<big_endian
>(p
, insn
);
5950 insn
= stvx_0_12_0
+ (r
<< 21);
5951 write_insn
<big_endian
>(p
, insn
);
5955 template<bool big_endian
>
5956 static unsigned char*
5957 savevr_tail(unsigned char* p
, int r
)
5959 p
= savevr
<big_endian
>(p
, r
);
5960 write_insn
<big_endian
>(p
, blr
);
5964 template<bool big_endian
>
5965 static unsigned char*
5966 restvr(unsigned char* p
, int r
)
5968 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5969 write_insn
<big_endian
>(p
, insn
);
5971 insn
= lvx_0_12_0
+ (r
<< 21);
5972 write_insn
<big_endian
>(p
, insn
);
5976 template<bool big_endian
>
5977 static unsigned char*
5978 restvr_tail(unsigned char* p
, int r
)
5980 p
= restvr
<big_endian
>(p
, r
);
5981 write_insn
<big_endian
>(p
, blr
);
5986 template<int size
, bool big_endian
>
5987 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5988 Symbol_table
* symtab
)
5989 : Output_section_data_build(4),
5992 this->savres_define(symtab
,
5993 "_savegpr0_", 14, 31,
5994 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5995 this->savres_define(symtab
,
5996 "_restgpr0_", 14, 29,
5997 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5998 this->savres_define(symtab
,
5999 "_restgpr0_", 30, 31,
6000 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
6001 this->savres_define(symtab
,
6002 "_savegpr1_", 14, 31,
6003 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
6004 this->savres_define(symtab
,
6005 "_restgpr1_", 14, 31,
6006 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
6007 this->savres_define(symtab
,
6008 "_savefpr_", 14, 31,
6009 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
6010 this->savres_define(symtab
,
6011 "_restfpr_", 14, 29,
6012 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6013 this->savres_define(symtab
,
6014 "_restfpr_", 30, 31,
6015 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6016 this->savres_define(symtab
,
6018 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
6019 this->savres_define(symtab
,
6021 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
6022 this->savres_define(symtab
,
6024 savevr
<big_endian
>, savevr_tail
<big_endian
>);
6025 this->savres_define(symtab
,
6027 restvr
<big_endian
>, restvr_tail
<big_endian
>);
6030 template<int size
, bool big_endian
>
6032 Output_data_save_res
<size
, big_endian
>::savres_define(
6033 Symbol_table
* symtab
,
6035 unsigned int lo
, unsigned int hi
,
6036 unsigned char* write_ent(unsigned char*, int),
6037 unsigned char* write_tail(unsigned char*, int))
6039 size_t len
= strlen(name
);
6040 bool writing
= false;
6043 memcpy(sym
, name
, len
);
6046 for (unsigned int i
= lo
; i
<= hi
; i
++)
6048 sym
[len
+ 0] = i
/ 10 + '0';
6049 sym
[len
+ 1] = i
% 10 + '0';
6050 Symbol
* gsym
= symtab
->lookup(sym
);
6051 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
6052 writing
= writing
|| refd
;
6055 if (this->contents_
== NULL
)
6056 this->contents_
= new unsigned char[this->savres_max
];
6058 section_size_type value
= this->current_data_size();
6059 unsigned char* p
= this->contents_
+ value
;
6061 p
= write_ent(p
, i
);
6063 p
= write_tail(p
, i
);
6064 section_size_type cur_size
= p
- this->contents_
;
6065 this->set_current_data_size(cur_size
);
6067 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
6068 this, value
, cur_size
- value
,
6069 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
6070 elfcpp::STV_HIDDEN
, 0, false, false);
6075 // Write out save/restore.
6077 template<int size
, bool big_endian
>
6079 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
6081 const section_size_type off
= this->offset();
6082 const section_size_type oview_size
=
6083 convert_to_section_size_type(this->data_size());
6084 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
6085 memcpy(oview
, this->contents_
, oview_size
);
6086 of
->write_output_view(off
, oview_size
, oview
);
6090 // Create the glink section.
6092 template<int size
, bool big_endian
>
6094 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
6096 if (this->glink_
== NULL
)
6098 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
6099 this->glink_
->add_eh_frame(layout
);
6100 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6101 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6102 this->glink_
, ORDER_TEXT
, false);
6106 // Create a PLT entry for a global symbol.
6108 template<int size
, bool big_endian
>
6110 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
6114 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
6115 && gsym
->can_use_relative_reloc(false))
6117 if (this->iplt_
== NULL
)
6118 this->make_iplt_section(symtab
, layout
);
6119 this->iplt_
->add_ifunc_entry(gsym
);
6123 if (this->plt_
== NULL
)
6124 this->make_plt_section(symtab
, layout
);
6125 this->plt_
->add_entry(gsym
);
6129 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
6131 template<int size
, bool big_endian
>
6133 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
6134 Symbol_table
* symtab
,
6136 Sized_relobj_file
<size
, big_endian
>* relobj
,
6139 if (this->iplt_
== NULL
)
6140 this->make_iplt_section(symtab
, layout
);
6141 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
6144 // Return the number of entries in the PLT.
6146 template<int size
, bool big_endian
>
6148 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
6150 if (this->plt_
== NULL
)
6152 return this->plt_
->entry_count();
6155 // Create a GOT entry for local dynamic __tls_get_addr calls.
6157 template<int size
, bool big_endian
>
6159 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
6160 Symbol_table
* symtab
,
6162 Sized_relobj_file
<size
, big_endian
>* object
)
6164 if (this->tlsld_got_offset_
== -1U)
6166 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
6167 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
6168 Output_data_got_powerpc
<size
, big_endian
>* got
6169 = this->got_section(symtab
, layout
);
6170 unsigned int got_offset
= got
->add_constant_pair(0, 0);
6171 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
6173 this->tlsld_got_offset_
= got_offset
;
6175 return this->tlsld_got_offset_
;
6178 // Get the Reference_flags for a particular relocation.
6180 template<int size
, bool big_endian
>
6182 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
6183 unsigned int r_type
,
6184 const Target_powerpc
* target
)
6190 case elfcpp::R_POWERPC_NONE
:
6191 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6192 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6193 case elfcpp::R_PPC64_TOC
:
6194 // No symbol reference.
6197 case elfcpp::R_PPC64_ADDR64
:
6198 case elfcpp::R_PPC64_UADDR64
:
6199 case elfcpp::R_POWERPC_ADDR32
:
6200 case elfcpp::R_POWERPC_UADDR32
:
6201 case elfcpp::R_POWERPC_ADDR16
:
6202 case elfcpp::R_POWERPC_UADDR16
:
6203 case elfcpp::R_POWERPC_ADDR16_LO
:
6204 case elfcpp::R_POWERPC_ADDR16_HI
:
6205 case elfcpp::R_POWERPC_ADDR16_HA
:
6206 ref
= Symbol::ABSOLUTE_REF
;
6209 case elfcpp::R_POWERPC_ADDR24
:
6210 case elfcpp::R_POWERPC_ADDR14
:
6211 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6212 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6213 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
6216 case elfcpp::R_PPC64_REL64
:
6217 case elfcpp::R_POWERPC_REL32
:
6218 case elfcpp::R_PPC_LOCAL24PC
:
6219 case elfcpp::R_POWERPC_REL16
:
6220 case elfcpp::R_POWERPC_REL16_LO
:
6221 case elfcpp::R_POWERPC_REL16_HI
:
6222 case elfcpp::R_POWERPC_REL16_HA
:
6223 ref
= Symbol::RELATIVE_REF
;
6226 case elfcpp::R_POWERPC_REL24
:
6227 case elfcpp::R_PPC_PLTREL24
:
6228 case elfcpp::R_POWERPC_REL14
:
6229 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6230 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6231 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
6234 case elfcpp::R_POWERPC_GOT16
:
6235 case elfcpp::R_POWERPC_GOT16_LO
:
6236 case elfcpp::R_POWERPC_GOT16_HI
:
6237 case elfcpp::R_POWERPC_GOT16_HA
:
6238 case elfcpp::R_PPC64_GOT16_DS
:
6239 case elfcpp::R_PPC64_GOT16_LO_DS
:
6240 case elfcpp::R_PPC64_TOC16
:
6241 case elfcpp::R_PPC64_TOC16_LO
:
6242 case elfcpp::R_PPC64_TOC16_HI
:
6243 case elfcpp::R_PPC64_TOC16_HA
:
6244 case elfcpp::R_PPC64_TOC16_DS
:
6245 case elfcpp::R_PPC64_TOC16_LO_DS
:
6246 ref
= Symbol::RELATIVE_REF
;
6249 case elfcpp::R_POWERPC_GOT_TPREL16
:
6250 case elfcpp::R_POWERPC_TLS
:
6251 ref
= Symbol::TLS_REF
;
6254 case elfcpp::R_POWERPC_COPY
:
6255 case elfcpp::R_POWERPC_GLOB_DAT
:
6256 case elfcpp::R_POWERPC_JMP_SLOT
:
6257 case elfcpp::R_POWERPC_RELATIVE
:
6258 case elfcpp::R_POWERPC_DTPMOD
:
6260 // Not expected. We will give an error later.
6264 if (size
== 64 && target
->abiversion() < 2)
6265 ref
|= Symbol::FUNC_DESC_ABI
;
6269 // Report an unsupported relocation against a local symbol.
6271 template<int size
, bool big_endian
>
6273 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
6274 Sized_relobj_file
<size
, big_endian
>* object
,
6275 unsigned int r_type
)
6277 gold_error(_("%s: unsupported reloc %u against local symbol"),
6278 object
->name().c_str(), r_type
);
6281 // We are about to emit a dynamic relocation of type R_TYPE. If the
6282 // dynamic linker does not support it, issue an error.
6284 template<int size
, bool big_endian
>
6286 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
6287 unsigned int r_type
)
6289 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
6291 // These are the relocation types supported by glibc for both 32-bit
6292 // and 64-bit powerpc.
6295 case elfcpp::R_POWERPC_NONE
:
6296 case elfcpp::R_POWERPC_RELATIVE
:
6297 case elfcpp::R_POWERPC_GLOB_DAT
:
6298 case elfcpp::R_POWERPC_DTPMOD
:
6299 case elfcpp::R_POWERPC_DTPREL
:
6300 case elfcpp::R_POWERPC_TPREL
:
6301 case elfcpp::R_POWERPC_JMP_SLOT
:
6302 case elfcpp::R_POWERPC_COPY
:
6303 case elfcpp::R_POWERPC_IRELATIVE
:
6304 case elfcpp::R_POWERPC_ADDR32
:
6305 case elfcpp::R_POWERPC_UADDR32
:
6306 case elfcpp::R_POWERPC_ADDR24
:
6307 case elfcpp::R_POWERPC_ADDR16
:
6308 case elfcpp::R_POWERPC_UADDR16
:
6309 case elfcpp::R_POWERPC_ADDR16_LO
:
6310 case elfcpp::R_POWERPC_ADDR16_HI
:
6311 case elfcpp::R_POWERPC_ADDR16_HA
:
6312 case elfcpp::R_POWERPC_ADDR14
:
6313 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6314 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6315 case elfcpp::R_POWERPC_REL32
:
6316 case elfcpp::R_POWERPC_REL24
:
6317 case elfcpp::R_POWERPC_TPREL16
:
6318 case elfcpp::R_POWERPC_TPREL16_LO
:
6319 case elfcpp::R_POWERPC_TPREL16_HI
:
6320 case elfcpp::R_POWERPC_TPREL16_HA
:
6331 // These are the relocation types supported only on 64-bit.
6332 case elfcpp::R_PPC64_ADDR64
:
6333 case elfcpp::R_PPC64_UADDR64
:
6334 case elfcpp::R_PPC64_JMP_IREL
:
6335 case elfcpp::R_PPC64_ADDR16_DS
:
6336 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6337 case elfcpp::R_PPC64_ADDR16_HIGH
:
6338 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6339 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6340 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6341 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6342 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6343 case elfcpp::R_PPC64_REL64
:
6344 case elfcpp::R_POWERPC_ADDR30
:
6345 case elfcpp::R_PPC64_TPREL16_DS
:
6346 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6347 case elfcpp::R_PPC64_TPREL16_HIGH
:
6348 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6349 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6350 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6351 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6352 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6363 // These are the relocation types supported only on 32-bit.
6364 // ??? glibc ld.so doesn't need to support these.
6365 case elfcpp::R_POWERPC_DTPREL16
:
6366 case elfcpp::R_POWERPC_DTPREL16_LO
:
6367 case elfcpp::R_POWERPC_DTPREL16_HI
:
6368 case elfcpp::R_POWERPC_DTPREL16_HA
:
6376 // This prevents us from issuing more than one error per reloc
6377 // section. But we can still wind up issuing more than one
6378 // error per object file.
6379 if (this->issued_non_pic_error_
)
6381 gold_assert(parameters
->options().output_is_position_independent());
6382 object
->error(_("requires unsupported dynamic reloc; "
6383 "recompile with -fPIC"));
6384 this->issued_non_pic_error_
= true;
6388 // Return whether we need to make a PLT entry for a relocation of the
6389 // given type against a STT_GNU_IFUNC symbol.
6391 template<int size
, bool big_endian
>
6393 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6394 Target_powerpc
<size
, big_endian
>* target
,
6395 Sized_relobj_file
<size
, big_endian
>* object
,
6396 unsigned int r_type
,
6399 // In non-pic code any reference will resolve to the plt call stub
6400 // for the ifunc symbol.
6401 if ((size
== 32 || target
->abiversion() >= 2)
6402 && !parameters
->options().output_is_position_independent())
6407 // Word size refs from data sections are OK, but don't need a PLT entry.
6408 case elfcpp::R_POWERPC_ADDR32
:
6409 case elfcpp::R_POWERPC_UADDR32
:
6414 case elfcpp::R_PPC64_ADDR64
:
6415 case elfcpp::R_PPC64_UADDR64
:
6420 // GOT refs are good, but also don't need a PLT entry.
6421 case elfcpp::R_POWERPC_GOT16
:
6422 case elfcpp::R_POWERPC_GOT16_LO
:
6423 case elfcpp::R_POWERPC_GOT16_HI
:
6424 case elfcpp::R_POWERPC_GOT16_HA
:
6425 case elfcpp::R_PPC64_GOT16_DS
:
6426 case elfcpp::R_PPC64_GOT16_LO_DS
:
6429 // Function calls are good, and these do need a PLT entry.
6430 case elfcpp::R_POWERPC_ADDR24
:
6431 case elfcpp::R_POWERPC_ADDR14
:
6432 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6433 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6434 case elfcpp::R_POWERPC_REL24
:
6435 case elfcpp::R_PPC_PLTREL24
:
6436 case elfcpp::R_POWERPC_REL14
:
6437 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6438 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6445 // Anything else is a problem.
6446 // If we are building a static executable, the libc startup function
6447 // responsible for applying indirect function relocations is going
6448 // to complain about the reloc type.
6449 // If we are building a dynamic executable, we will have a text
6450 // relocation. The dynamic loader will set the text segment
6451 // writable and non-executable to apply text relocations. So we'll
6452 // segfault when trying to run the indirection function to resolve
6455 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6456 object
->name().c_str(), r_type
);
6460 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6464 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6466 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6467 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6468 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6469 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6470 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6471 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6472 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6473 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6474 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6475 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6476 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6477 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6478 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6479 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6480 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6481 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6482 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6483 /* Exclude lfqu by testing reloc. If relocs are ever
6484 defined for the reduced D field in psq_lu then those
6485 will need testing too. */
6486 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6487 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6488 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6490 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6491 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6492 /* Exclude stfqu. psq_stu as above for psq_lu. */
6493 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6494 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6495 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6496 && (insn
& 1) == 0));
6499 // Scan a relocation for a local symbol.
6501 template<int size
, bool big_endian
>
6503 Target_powerpc
<size
, big_endian
>::Scan::local(
6504 Symbol_table
* symtab
,
6506 Target_powerpc
<size
, big_endian
>* target
,
6507 Sized_relobj_file
<size
, big_endian
>* object
,
6508 unsigned int data_shndx
,
6509 Output_section
* output_section
,
6510 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6511 unsigned int r_type
,
6512 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6515 this->maybe_skip_tls_get_addr_call(target
, r_type
, NULL
);
6517 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6518 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6520 this->expect_tls_get_addr_call();
6521 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6522 if (tls_type
!= tls::TLSOPT_NONE
)
6523 this->skip_next_tls_get_addr_call();
6525 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6526 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6528 this->expect_tls_get_addr_call();
6529 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6530 if (tls_type
!= tls::TLSOPT_NONE
)
6531 this->skip_next_tls_get_addr_call();
6534 Powerpc_relobj
<size
, big_endian
>* ppc_object
6535 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6540 && data_shndx
== ppc_object
->opd_shndx()
6541 && r_type
== elfcpp::R_PPC64_ADDR64
)
6542 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6546 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6547 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6548 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6550 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6551 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6552 r_type
, r_sym
, reloc
.get_r_addend());
6553 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6558 case elfcpp::R_POWERPC_NONE
:
6559 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6560 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6561 case elfcpp::R_POWERPC_TLS
:
6562 case elfcpp::R_PPC64_ENTRY
:
6565 case elfcpp::R_PPC64_TOC
:
6567 Output_data_got_powerpc
<size
, big_endian
>* got
6568 = target
->got_section(symtab
, layout
);
6569 if (parameters
->options().output_is_position_independent())
6571 Address off
= reloc
.get_r_offset();
6573 && target
->abiversion() < 2
6574 && data_shndx
== ppc_object
->opd_shndx()
6575 && ppc_object
->get_opd_discard(off
- 8))
6578 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6579 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6580 rela_dyn
->add_output_section_relative(got
->output_section(),
6581 elfcpp::R_POWERPC_RELATIVE
,
6583 object
, data_shndx
, off
,
6584 symobj
->toc_base_offset());
6589 case elfcpp::R_PPC64_ADDR64
:
6590 case elfcpp::R_PPC64_UADDR64
:
6591 case elfcpp::R_POWERPC_ADDR32
:
6592 case elfcpp::R_POWERPC_UADDR32
:
6593 case elfcpp::R_POWERPC_ADDR24
:
6594 case elfcpp::R_POWERPC_ADDR16
:
6595 case elfcpp::R_POWERPC_ADDR16_LO
:
6596 case elfcpp::R_POWERPC_ADDR16_HI
:
6597 case elfcpp::R_POWERPC_ADDR16_HA
:
6598 case elfcpp::R_POWERPC_UADDR16
:
6599 case elfcpp::R_PPC64_ADDR16_HIGH
:
6600 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6601 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6602 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6603 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6604 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6605 case elfcpp::R_PPC64_ADDR16_DS
:
6606 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6607 case elfcpp::R_POWERPC_ADDR14
:
6608 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6609 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6610 // If building a shared library (or a position-independent
6611 // executable), we need to create a dynamic relocation for
6613 if (parameters
->options().output_is_position_independent()
6614 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6616 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6618 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6619 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6620 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6622 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6623 : elfcpp::R_POWERPC_RELATIVE
);
6624 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6625 output_section
, data_shndx
,
6626 reloc
.get_r_offset(),
6627 reloc
.get_r_addend(), false);
6629 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6631 check_non_pic(object
, r_type
);
6632 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6633 data_shndx
, reloc
.get_r_offset(),
6634 reloc
.get_r_addend());
6638 gold_assert(lsym
.get_st_value() == 0);
6639 unsigned int shndx
= lsym
.get_st_shndx();
6641 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6644 object
->error(_("section symbol %u has bad shndx %u"),
6647 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6648 output_section
, data_shndx
,
6649 reloc
.get_r_offset());
6654 case elfcpp::R_POWERPC_REL24
:
6655 case elfcpp::R_PPC_PLTREL24
:
6656 case elfcpp::R_PPC_LOCAL24PC
:
6657 case elfcpp::R_POWERPC_REL14
:
6658 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6659 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6662 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6663 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6664 r_type
, r_sym
, reloc
.get_r_addend());
6668 case elfcpp::R_PPC64_TOCSAVE
:
6669 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6670 // caller has already saved r2 and thus a plt call stub need not
6673 && target
->mark_pltcall(ppc_object
, data_shndx
,
6674 reloc
.get_r_offset() - 4, symtab
))
6676 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6677 unsigned int shndx
= lsym
.get_st_shndx();
6679 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6681 object
->error(_("tocsave symbol %u has bad shndx %u"),
6684 target
->add_tocsave(ppc_object
, shndx
,
6685 lsym
.get_st_value() + reloc
.get_r_addend());
6689 case elfcpp::R_PPC64_REL64
:
6690 case elfcpp::R_POWERPC_REL32
:
6691 case elfcpp::R_POWERPC_REL16
:
6692 case elfcpp::R_POWERPC_REL16_LO
:
6693 case elfcpp::R_POWERPC_REL16_HI
:
6694 case elfcpp::R_POWERPC_REL16_HA
:
6695 case elfcpp::R_POWERPC_REL16DX_HA
:
6696 case elfcpp::R_POWERPC_SECTOFF
:
6697 case elfcpp::R_POWERPC_SECTOFF_LO
:
6698 case elfcpp::R_POWERPC_SECTOFF_HI
:
6699 case elfcpp::R_POWERPC_SECTOFF_HA
:
6700 case elfcpp::R_PPC64_SECTOFF_DS
:
6701 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6702 case elfcpp::R_POWERPC_TPREL16
:
6703 case elfcpp::R_POWERPC_TPREL16_LO
:
6704 case elfcpp::R_POWERPC_TPREL16_HI
:
6705 case elfcpp::R_POWERPC_TPREL16_HA
:
6706 case elfcpp::R_PPC64_TPREL16_DS
:
6707 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6708 case elfcpp::R_PPC64_TPREL16_HIGH
:
6709 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6710 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6711 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6712 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6713 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6714 case elfcpp::R_POWERPC_DTPREL16
:
6715 case elfcpp::R_POWERPC_DTPREL16_LO
:
6716 case elfcpp::R_POWERPC_DTPREL16_HI
:
6717 case elfcpp::R_POWERPC_DTPREL16_HA
:
6718 case elfcpp::R_PPC64_DTPREL16_DS
:
6719 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6720 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6721 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6722 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6723 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6724 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6725 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6726 case elfcpp::R_PPC64_TLSGD
:
6727 case elfcpp::R_PPC64_TLSLD
:
6728 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6731 case elfcpp::R_POWERPC_GOT16
:
6732 case elfcpp::R_POWERPC_GOT16_LO
:
6733 case elfcpp::R_POWERPC_GOT16_HI
:
6734 case elfcpp::R_POWERPC_GOT16_HA
:
6735 case elfcpp::R_PPC64_GOT16_DS
:
6736 case elfcpp::R_PPC64_GOT16_LO_DS
:
6738 // The symbol requires a GOT entry.
6739 Output_data_got_powerpc
<size
, big_endian
>* got
6740 = target
->got_section(symtab
, layout
);
6741 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6743 if (!parameters
->options().output_is_position_independent())
6746 && (size
== 32 || target
->abiversion() >= 2))
6747 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6749 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6751 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6753 // If we are generating a shared object or a pie, this
6754 // symbol's GOT entry will be set by a dynamic relocation.
6756 off
= got
->add_constant(0);
6757 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6759 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6761 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6762 : elfcpp::R_POWERPC_RELATIVE
);
6763 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6764 got
, off
, 0, false);
6769 case elfcpp::R_PPC64_TOC16
:
6770 case elfcpp::R_PPC64_TOC16_LO
:
6771 case elfcpp::R_PPC64_TOC16_HI
:
6772 case elfcpp::R_PPC64_TOC16_HA
:
6773 case elfcpp::R_PPC64_TOC16_DS
:
6774 case elfcpp::R_PPC64_TOC16_LO_DS
:
6775 // We need a GOT section.
6776 target
->got_section(symtab
, layout
);
6779 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6780 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6781 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6782 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6784 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6785 if (tls_type
== tls::TLSOPT_NONE
)
6787 Output_data_got_powerpc
<size
, big_endian
>* got
6788 = target
->got_section(symtab
, layout
);
6789 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6790 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6791 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6792 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6794 else if (tls_type
== tls::TLSOPT_TO_LE
)
6796 // no GOT relocs needed for Local Exec.
6803 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6804 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6805 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6806 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6808 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6809 if (tls_type
== tls::TLSOPT_NONE
)
6810 target
->tlsld_got_offset(symtab
, layout
, object
);
6811 else if (tls_type
== tls::TLSOPT_TO_LE
)
6813 // no GOT relocs needed for Local Exec.
6814 if (parameters
->options().emit_relocs())
6816 Output_section
* os
= layout
->tls_segment()->first_section();
6817 gold_assert(os
!= NULL
);
6818 os
->set_needs_symtab_index();
6826 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6827 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6828 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6829 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6831 Output_data_got_powerpc
<size
, big_endian
>* got
6832 = target
->got_section(symtab
, layout
);
6833 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6834 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6838 case elfcpp::R_POWERPC_GOT_TPREL16
:
6839 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6840 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6841 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6843 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6844 if (tls_type
== tls::TLSOPT_NONE
)
6846 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6847 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6849 Output_data_got_powerpc
<size
, big_endian
>* got
6850 = target
->got_section(symtab
, layout
);
6851 unsigned int off
= got
->add_constant(0);
6852 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6854 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6855 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6856 elfcpp::R_POWERPC_TPREL
,
6860 else if (tls_type
== tls::TLSOPT_TO_LE
)
6862 // no GOT relocs needed for Local Exec.
6870 unsupported_reloc_local(object
, r_type
);
6875 && parameters
->options().toc_optimize())
6877 if (data_shndx
== ppc_object
->toc_shndx())
6880 if (r_type
!= elfcpp::R_PPC64_ADDR64
6881 || (is_ifunc
&& target
->abiversion() < 2))
6883 else if (parameters
->options().output_is_position_independent())
6889 unsigned int shndx
= lsym
.get_st_shndx();
6890 if (shndx
>= elfcpp::SHN_LORESERVE
6891 && shndx
!= elfcpp::SHN_XINDEX
)
6896 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6899 enum {no_check
, check_lo
, check_ha
} insn_check
;
6903 insn_check
= no_check
;
6906 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6907 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6908 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6909 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6910 case elfcpp::R_POWERPC_GOT16_HA
:
6911 case elfcpp::R_PPC64_TOC16_HA
:
6912 insn_check
= check_ha
;
6915 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6916 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6917 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6918 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6919 case elfcpp::R_POWERPC_GOT16_LO
:
6920 case elfcpp::R_PPC64_GOT16_LO_DS
:
6921 case elfcpp::R_PPC64_TOC16_LO
:
6922 case elfcpp::R_PPC64_TOC16_LO_DS
:
6923 insn_check
= check_lo
;
6927 section_size_type slen
;
6928 const unsigned char* view
= NULL
;
6929 if (insn_check
!= no_check
)
6931 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6932 section_size_type off
=
6933 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6936 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6937 if (insn_check
== check_lo
6938 ? !ok_lo_toc_insn(insn
, r_type
)
6939 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6940 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6942 ppc_object
->set_no_toc_opt();
6943 gold_warning(_("%s: toc optimization is not supported "
6944 "for %#08x instruction"),
6945 ppc_object
->name().c_str(), insn
);
6954 case elfcpp::R_PPC64_TOC16
:
6955 case elfcpp::R_PPC64_TOC16_LO
:
6956 case elfcpp::R_PPC64_TOC16_HI
:
6957 case elfcpp::R_PPC64_TOC16_HA
:
6958 case elfcpp::R_PPC64_TOC16_DS
:
6959 case elfcpp::R_PPC64_TOC16_LO_DS
:
6960 unsigned int shndx
= lsym
.get_st_shndx();
6961 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6963 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6964 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6966 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_addend();
6967 if (dst_off
< ppc_object
->section_size(shndx
))
6970 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6972 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6974 // Need to check that the insn is a ld
6976 view
= ppc_object
->section_contents(data_shndx
,
6979 section_size_type off
=
6980 (convert_to_section_size_type(reloc
.get_r_offset())
6981 + (big_endian
? -2 : 3));
6983 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6987 ppc_object
->set_no_toc_opt(dst_off
);
6998 case elfcpp::R_POWERPC_REL32
:
6999 if (ppc_object
->got2_shndx() != 0
7000 && parameters
->options().output_is_position_independent())
7002 unsigned int shndx
= lsym
.get_st_shndx();
7003 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7005 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7006 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
7007 && (ppc_object
->section_flags(data_shndx
)
7008 & elfcpp::SHF_EXECINSTR
) != 0)
7009 gold_error(_("%s: unsupported -mbss-plt code"),
7010 ppc_object
->name().c_str());
7020 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7021 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7022 case elfcpp::R_POWERPC_GOT_TPREL16
:
7023 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7024 case elfcpp::R_POWERPC_GOT16
:
7025 case elfcpp::R_PPC64_GOT16_DS
:
7026 case elfcpp::R_PPC64_TOC16
:
7027 case elfcpp::R_PPC64_TOC16_DS
:
7028 ppc_object
->set_has_small_toc_reloc();
7034 // Report an unsupported relocation against a global symbol.
7036 template<int size
, bool big_endian
>
7038 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
7039 Sized_relobj_file
<size
, big_endian
>* object
,
7040 unsigned int r_type
,
7043 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
7044 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
7047 // Scan a relocation for a global symbol.
7049 template<int size
, bool big_endian
>
7051 Target_powerpc
<size
, big_endian
>::Scan::global(
7052 Symbol_table
* symtab
,
7054 Target_powerpc
<size
, big_endian
>* target
,
7055 Sized_relobj_file
<size
, big_endian
>* object
,
7056 unsigned int data_shndx
,
7057 Output_section
* output_section
,
7058 const elfcpp::Rela
<size
, big_endian
>& reloc
,
7059 unsigned int r_type
,
7062 if (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
)
7066 if (target
->replace_tls_get_addr(gsym
))
7067 // Change a __tls_get_addr reference to __tls_get_addr_opt
7068 // so dynamic relocs are emitted against the latter symbol.
7069 gsym
= target
->tls_get_addr_opt();
7071 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7072 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7074 this->expect_tls_get_addr_call();
7075 const bool final
= gsym
->final_value_is_known();
7076 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7077 if (tls_type
!= tls::TLSOPT_NONE
)
7078 this->skip_next_tls_get_addr_call();
7080 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7081 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7083 this->expect_tls_get_addr_call();
7084 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7085 if (tls_type
!= tls::TLSOPT_NONE
)
7086 this->skip_next_tls_get_addr_call();
7089 Powerpc_relobj
<size
, big_endian
>* ppc_object
7090 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7092 // A STT_GNU_IFUNC symbol may require a PLT entry.
7093 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
7094 bool pushed_ifunc
= false;
7095 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
7097 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7098 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7099 r_type
, r_sym
, reloc
.get_r_addend());
7100 target
->make_plt_entry(symtab
, layout
, gsym
);
7101 pushed_ifunc
= true;
7106 case elfcpp::R_POWERPC_NONE
:
7107 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7108 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7109 case elfcpp::R_PPC_LOCAL24PC
:
7110 case elfcpp::R_POWERPC_TLS
:
7111 case elfcpp::R_PPC64_ENTRY
:
7114 case elfcpp::R_PPC64_TOC
:
7116 Output_data_got_powerpc
<size
, big_endian
>* got
7117 = target
->got_section(symtab
, layout
);
7118 if (parameters
->options().output_is_position_independent())
7120 Address off
= reloc
.get_r_offset();
7122 && data_shndx
== ppc_object
->opd_shndx()
7123 && ppc_object
->get_opd_discard(off
- 8))
7126 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7127 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
7128 if (data_shndx
!= ppc_object
->opd_shndx())
7129 symobj
= static_cast
7130 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7131 rela_dyn
->add_output_section_relative(got
->output_section(),
7132 elfcpp::R_POWERPC_RELATIVE
,
7134 object
, data_shndx
, off
,
7135 symobj
->toc_base_offset());
7140 case elfcpp::R_PPC64_ADDR64
:
7142 && target
->abiversion() < 2
7143 && data_shndx
== ppc_object
->opd_shndx()
7144 && (gsym
->is_defined_in_discarded_section()
7145 || gsym
->object() != object
))
7147 ppc_object
->set_opd_discard(reloc
.get_r_offset());
7151 case elfcpp::R_PPC64_UADDR64
:
7152 case elfcpp::R_POWERPC_ADDR32
:
7153 case elfcpp::R_POWERPC_UADDR32
:
7154 case elfcpp::R_POWERPC_ADDR24
:
7155 case elfcpp::R_POWERPC_ADDR16
:
7156 case elfcpp::R_POWERPC_ADDR16_LO
:
7157 case elfcpp::R_POWERPC_ADDR16_HI
:
7158 case elfcpp::R_POWERPC_ADDR16_HA
:
7159 case elfcpp::R_POWERPC_UADDR16
:
7160 case elfcpp::R_PPC64_ADDR16_HIGH
:
7161 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7162 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7163 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7164 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7165 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7166 case elfcpp::R_PPC64_ADDR16_DS
:
7167 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7168 case elfcpp::R_POWERPC_ADDR14
:
7169 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7170 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7172 // Make a PLT entry if necessary.
7173 if (gsym
->needs_plt_entry())
7175 // Since this is not a PC-relative relocation, we may be
7176 // taking the address of a function. In that case we need to
7177 // set the entry in the dynamic symbol table to the address of
7178 // the PLT call stub.
7179 bool need_ifunc_plt
= false;
7180 if ((size
== 32 || target
->abiversion() >= 2)
7181 && gsym
->is_from_dynobj()
7182 && !parameters
->options().output_is_position_independent())
7184 gsym
->set_needs_dynsym_value();
7185 need_ifunc_plt
= true;
7187 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
7189 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7190 target
->push_branch(ppc_object
, data_shndx
,
7191 reloc
.get_r_offset(), r_type
, r_sym
,
7192 reloc
.get_r_addend());
7193 target
->make_plt_entry(symtab
, layout
, gsym
);
7196 // Make a dynamic relocation if necessary.
7197 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
7198 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
7200 if (!parameters
->options().output_is_position_independent()
7201 && gsym
->may_need_copy_reloc())
7203 target
->copy_reloc(symtab
, layout
, object
,
7204 data_shndx
, output_section
, gsym
, reloc
);
7206 else if ((((size
== 32
7207 && r_type
== elfcpp::R_POWERPC_ADDR32
)
7209 && r_type
== elfcpp::R_PPC64_ADDR64
7210 && target
->abiversion() >= 2))
7211 && gsym
->can_use_relative_reloc(false)
7212 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
7213 && parameters
->options().shared()))
7215 && r_type
== elfcpp::R_PPC64_ADDR64
7216 && target
->abiversion() < 2
7217 && (gsym
->can_use_relative_reloc(false)
7218 || data_shndx
== ppc_object
->opd_shndx())))
7220 Reloc_section
* rela_dyn
7221 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7222 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7223 : elfcpp::R_POWERPC_RELATIVE
);
7224 rela_dyn
->add_symbolless_global_addend(
7225 gsym
, dynrel
, output_section
, object
, data_shndx
,
7226 reloc
.get_r_offset(), reloc
.get_r_addend());
7230 Reloc_section
* rela_dyn
7231 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7232 check_non_pic(object
, r_type
);
7233 rela_dyn
->add_global(gsym
, r_type
, output_section
,
7235 reloc
.get_r_offset(),
7236 reloc
.get_r_addend());
7239 && parameters
->options().toc_optimize()
7240 && data_shndx
== ppc_object
->toc_shndx())
7241 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7247 case elfcpp::R_PPC_PLTREL24
:
7248 case elfcpp::R_POWERPC_REL24
:
7251 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7252 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7253 r_type
, r_sym
, reloc
.get_r_addend());
7254 if (gsym
->needs_plt_entry()
7255 || (!gsym
->final_value_is_known()
7256 && (gsym
->is_undefined()
7257 || gsym
->is_from_dynobj()
7258 || gsym
->is_preemptible())))
7259 target
->make_plt_entry(symtab
, layout
, gsym
);
7263 case elfcpp::R_PPC64_REL64
:
7264 case elfcpp::R_POWERPC_REL32
:
7265 // Make a dynamic relocation if necessary.
7266 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
7268 if (!parameters
->options().output_is_position_independent()
7269 && gsym
->may_need_copy_reloc())
7271 target
->copy_reloc(symtab
, layout
, object
,
7272 data_shndx
, output_section
, gsym
,
7277 Reloc_section
* rela_dyn
7278 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7279 check_non_pic(object
, r_type
);
7280 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
7281 data_shndx
, reloc
.get_r_offset(),
7282 reloc
.get_r_addend());
7287 case elfcpp::R_POWERPC_REL14
:
7288 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7289 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7292 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7293 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7294 r_type
, r_sym
, reloc
.get_r_addend());
7298 case elfcpp::R_PPC64_TOCSAVE
:
7299 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7300 // caller has already saved r2 and thus a plt call stub need not
7303 && target
->mark_pltcall(ppc_object
, data_shndx
,
7304 reloc
.get_r_offset() - 4, symtab
))
7306 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7308 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7310 object
->error(_("tocsave symbol %u has bad shndx %u"),
7314 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7315 target
->add_tocsave(ppc_object
, shndx
,
7316 sym
->value() + reloc
.get_r_addend());
7321 case elfcpp::R_POWERPC_REL16
:
7322 case elfcpp::R_POWERPC_REL16_LO
:
7323 case elfcpp::R_POWERPC_REL16_HI
:
7324 case elfcpp::R_POWERPC_REL16_HA
:
7325 case elfcpp::R_POWERPC_REL16DX_HA
:
7326 case elfcpp::R_POWERPC_SECTOFF
:
7327 case elfcpp::R_POWERPC_SECTOFF_LO
:
7328 case elfcpp::R_POWERPC_SECTOFF_HI
:
7329 case elfcpp::R_POWERPC_SECTOFF_HA
:
7330 case elfcpp::R_PPC64_SECTOFF_DS
:
7331 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7332 case elfcpp::R_POWERPC_TPREL16
:
7333 case elfcpp::R_POWERPC_TPREL16_LO
:
7334 case elfcpp::R_POWERPC_TPREL16_HI
:
7335 case elfcpp::R_POWERPC_TPREL16_HA
:
7336 case elfcpp::R_PPC64_TPREL16_DS
:
7337 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7338 case elfcpp::R_PPC64_TPREL16_HIGH
:
7339 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7340 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7341 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7342 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7343 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7344 case elfcpp::R_POWERPC_DTPREL16
:
7345 case elfcpp::R_POWERPC_DTPREL16_LO
:
7346 case elfcpp::R_POWERPC_DTPREL16_HI
:
7347 case elfcpp::R_POWERPC_DTPREL16_HA
:
7348 case elfcpp::R_PPC64_DTPREL16_DS
:
7349 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7350 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7351 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7352 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7353 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7354 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7355 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7356 case elfcpp::R_PPC64_TLSGD
:
7357 case elfcpp::R_PPC64_TLSLD
:
7358 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7361 case elfcpp::R_POWERPC_GOT16
:
7362 case elfcpp::R_POWERPC_GOT16_LO
:
7363 case elfcpp::R_POWERPC_GOT16_HI
:
7364 case elfcpp::R_POWERPC_GOT16_HA
:
7365 case elfcpp::R_PPC64_GOT16_DS
:
7366 case elfcpp::R_PPC64_GOT16_LO_DS
:
7368 // The symbol requires a GOT entry.
7369 Output_data_got_powerpc
<size
, big_endian
>* got
;
7371 got
= target
->got_section(symtab
, layout
);
7372 if (gsym
->final_value_is_known())
7375 && (size
== 32 || target
->abiversion() >= 2))
7376 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7378 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7380 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7382 // If we are generating a shared object or a pie, this
7383 // symbol's GOT entry will be set by a dynamic relocation.
7384 unsigned int off
= got
->add_constant(0);
7385 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7387 Reloc_section
* rela_dyn
7388 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7390 if (gsym
->can_use_relative_reloc(false)
7392 || target
->abiversion() >= 2)
7393 && gsym
->visibility() == elfcpp::STV_PROTECTED
7394 && parameters
->options().shared()))
7396 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7397 : elfcpp::R_POWERPC_RELATIVE
);
7398 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7402 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7403 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7409 case elfcpp::R_PPC64_TOC16
:
7410 case elfcpp::R_PPC64_TOC16_LO
:
7411 case elfcpp::R_PPC64_TOC16_HI
:
7412 case elfcpp::R_PPC64_TOC16_HA
:
7413 case elfcpp::R_PPC64_TOC16_DS
:
7414 case elfcpp::R_PPC64_TOC16_LO_DS
:
7415 // We need a GOT section.
7416 target
->got_section(symtab
, layout
);
7419 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7420 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7421 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7422 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7424 const bool final
= gsym
->final_value_is_known();
7425 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7426 if (tls_type
== tls::TLSOPT_NONE
)
7428 Output_data_got_powerpc
<size
, big_endian
>* got
7429 = target
->got_section(symtab
, layout
);
7430 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7431 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7432 elfcpp::R_POWERPC_DTPMOD
,
7433 elfcpp::R_POWERPC_DTPREL
);
7435 else if (tls_type
== tls::TLSOPT_TO_IE
)
7437 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7439 Output_data_got_powerpc
<size
, big_endian
>* got
7440 = target
->got_section(symtab
, layout
);
7441 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7442 if (gsym
->is_undefined()
7443 || gsym
->is_from_dynobj())
7445 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7446 elfcpp::R_POWERPC_TPREL
);
7450 unsigned int off
= got
->add_constant(0);
7451 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7452 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7453 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7458 else if (tls_type
== tls::TLSOPT_TO_LE
)
7460 // no GOT relocs needed for Local Exec.
7467 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7468 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7469 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7470 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7472 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7473 if (tls_type
== tls::TLSOPT_NONE
)
7474 target
->tlsld_got_offset(symtab
, layout
, object
);
7475 else if (tls_type
== tls::TLSOPT_TO_LE
)
7477 // no GOT relocs needed for Local Exec.
7478 if (parameters
->options().emit_relocs())
7480 Output_section
* os
= layout
->tls_segment()->first_section();
7481 gold_assert(os
!= NULL
);
7482 os
->set_needs_symtab_index();
7490 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7491 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7492 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7493 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7495 Output_data_got_powerpc
<size
, big_endian
>* got
7496 = target
->got_section(symtab
, layout
);
7497 if (!gsym
->final_value_is_known()
7498 && (gsym
->is_from_dynobj()
7499 || gsym
->is_undefined()
7500 || gsym
->is_preemptible()))
7501 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7502 target
->rela_dyn_section(layout
),
7503 elfcpp::R_POWERPC_DTPREL
);
7505 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7509 case elfcpp::R_POWERPC_GOT_TPREL16
:
7510 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7511 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7512 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7514 const bool final
= gsym
->final_value_is_known();
7515 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7516 if (tls_type
== tls::TLSOPT_NONE
)
7518 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7520 Output_data_got_powerpc
<size
, big_endian
>* got
7521 = target
->got_section(symtab
, layout
);
7522 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7523 if (gsym
->is_undefined()
7524 || gsym
->is_from_dynobj())
7526 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7527 elfcpp::R_POWERPC_TPREL
);
7531 unsigned int off
= got
->add_constant(0);
7532 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7533 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7534 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7539 else if (tls_type
== tls::TLSOPT_TO_LE
)
7541 // no GOT relocs needed for Local Exec.
7549 unsupported_reloc_global(object
, r_type
, gsym
);
7554 && parameters
->options().toc_optimize())
7556 if (data_shndx
== ppc_object
->toc_shndx())
7559 if (r_type
!= elfcpp::R_PPC64_ADDR64
7560 || (is_ifunc
&& target
->abiversion() < 2))
7562 else if (parameters
->options().output_is_position_independent()
7563 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7566 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7569 enum {no_check
, check_lo
, check_ha
} insn_check
;
7573 insn_check
= no_check
;
7576 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7577 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7578 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7579 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7580 case elfcpp::R_POWERPC_GOT16_HA
:
7581 case elfcpp::R_PPC64_TOC16_HA
:
7582 insn_check
= check_ha
;
7585 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7586 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7587 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7588 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7589 case elfcpp::R_POWERPC_GOT16_LO
:
7590 case elfcpp::R_PPC64_GOT16_LO_DS
:
7591 case elfcpp::R_PPC64_TOC16_LO
:
7592 case elfcpp::R_PPC64_TOC16_LO_DS
:
7593 insn_check
= check_lo
;
7597 section_size_type slen
;
7598 const unsigned char* view
= NULL
;
7599 if (insn_check
!= no_check
)
7601 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7602 section_size_type off
=
7603 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7606 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7607 if (insn_check
== check_lo
7608 ? !ok_lo_toc_insn(insn
, r_type
)
7609 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7610 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7612 ppc_object
->set_no_toc_opt();
7613 gold_warning(_("%s: toc optimization is not supported "
7614 "for %#08x instruction"),
7615 ppc_object
->name().c_str(), insn
);
7624 case elfcpp::R_PPC64_TOC16
:
7625 case elfcpp::R_PPC64_TOC16_LO
:
7626 case elfcpp::R_PPC64_TOC16_HI
:
7627 case elfcpp::R_PPC64_TOC16_HA
:
7628 case elfcpp::R_PPC64_TOC16_DS
:
7629 case elfcpp::R_PPC64_TOC16_LO_DS
:
7630 if (gsym
->source() == Symbol::FROM_OBJECT
7631 && !gsym
->object()->is_dynamic())
7633 Powerpc_relobj
<size
, big_endian
>* sym_object
7634 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7636 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7637 if (shndx
== sym_object
->toc_shndx())
7639 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7640 Address dst_off
= sym
->value() + reloc
.get_r_addend();
7641 if (dst_off
< sym_object
->section_size(shndx
))
7644 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7646 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7648 // Need to check that the insn is a ld
7650 view
= ppc_object
->section_contents(data_shndx
,
7653 section_size_type off
=
7654 (convert_to_section_size_type(reloc
.get_r_offset())
7655 + (big_endian
? -2 : 3));
7657 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7661 sym_object
->set_no_toc_opt(dst_off
);
7673 case elfcpp::R_PPC_LOCAL24PC
:
7674 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7675 gold_error(_("%s: unsupported -mbss-plt code"),
7676 ppc_object
->name().c_str());
7685 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7686 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7687 case elfcpp::R_POWERPC_GOT_TPREL16
:
7688 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7689 case elfcpp::R_POWERPC_GOT16
:
7690 case elfcpp::R_PPC64_GOT16_DS
:
7691 case elfcpp::R_PPC64_TOC16
:
7692 case elfcpp::R_PPC64_TOC16_DS
:
7693 ppc_object
->set_has_small_toc_reloc();
7699 // Process relocations for gc.
7701 template<int size
, bool big_endian
>
7703 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
7704 Symbol_table
* symtab
,
7706 Sized_relobj_file
<size
, big_endian
>* object
,
7707 unsigned int data_shndx
,
7709 const unsigned char* prelocs
,
7711 Output_section
* output_section
,
7712 bool needs_special_offset_handling
,
7713 size_t local_symbol_count
,
7714 const unsigned char* plocal_symbols
)
7716 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7717 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7720 Powerpc_relobj
<size
, big_endian
>* ppc_object
7721 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7723 ppc_object
->set_opd_valid();
7724 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7726 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7727 for (p
= ppc_object
->access_from_map()->begin();
7728 p
!= ppc_object
->access_from_map()->end();
7731 Address dst_off
= p
->first
;
7732 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7733 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7734 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7736 Relobj
* src_obj
= s
->first
;
7737 unsigned int src_indx
= s
->second
;
7738 symtab
->gc()->add_reference(src_obj
, src_indx
,
7739 ppc_object
, dst_indx
);
7743 ppc_object
->access_from_map()->clear();
7744 ppc_object
->process_gc_mark(symtab
);
7745 // Don't look at .opd relocs as .opd will reference everything.
7749 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7758 needs_special_offset_handling
,
7763 // Handle target specific gc actions when adding a gc reference from
7764 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7765 // and DST_OFF. For powerpc64, this adds a referenc to the code
7766 // section of a function descriptor.
7768 template<int size
, bool big_endian
>
7770 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7771 Symbol_table
* symtab
,
7773 unsigned int src_shndx
,
7775 unsigned int dst_shndx
,
7776 Address dst_off
) const
7778 if (size
!= 64 || dst_obj
->is_dynamic())
7781 Powerpc_relobj
<size
, big_endian
>* ppc_object
7782 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7783 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7785 if (ppc_object
->opd_valid())
7787 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7788 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7792 // If we haven't run scan_opd_relocs, we must delay
7793 // processing this function descriptor reference.
7794 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7799 // Add any special sections for this symbol to the gc work list.
7800 // For powerpc64, this adds the code section of a function
7803 template<int size
, bool big_endian
>
7805 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7806 Symbol_table
* symtab
,
7811 Powerpc_relobj
<size
, big_endian
>* ppc_object
7812 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7814 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7815 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7817 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7818 Address dst_off
= gsym
->value();
7819 if (ppc_object
->opd_valid())
7821 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7822 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7826 ppc_object
->add_gc_mark(dst_off
);
7831 // For a symbol location in .opd, set LOC to the location of the
7834 template<int size
, bool big_endian
>
7836 Target_powerpc
<size
, big_endian
>::do_function_location(
7837 Symbol_location
* loc
) const
7839 if (size
== 64 && loc
->shndx
!= 0)
7841 if (loc
->object
->is_dynamic())
7843 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7844 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7845 if (loc
->shndx
== ppc_object
->opd_shndx())
7848 Address off
= loc
->offset
- ppc_object
->opd_address();
7849 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7850 loc
->offset
= dest_off
;
7855 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7856 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7857 if (loc
->shndx
== ppc_object
->opd_shndx())
7860 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7861 loc
->offset
= dest_off
;
7867 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7868 // compiled with -fsplit-stack. The function calls non-split-stack
7869 // code. Change the function to ensure it has enough stack space to
7870 // call some random function.
7872 template<int size
, bool big_endian
>
7874 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7877 section_offset_type fnoffset
,
7878 section_size_type fnsize
,
7879 const unsigned char* prelocs
,
7881 unsigned char* view
,
7882 section_size_type view_size
,
7884 std::string
* to
) const
7886 // 32-bit not supported.
7890 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7891 prelocs
, reloc_count
, view
, view_size
,
7896 // The function always starts with
7897 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7898 // addis %r12,%r1,-allocate@ha
7899 // addi %r12,%r12,-allocate@l
7901 // but note that the addis or addi may be replaced with a nop
7903 unsigned char *entry
= view
+ fnoffset
;
7904 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7906 if ((insn
& 0xffff0000) == addis_2_12
)
7908 /* Skip ELFv2 global entry code. */
7910 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7913 unsigned char *pinsn
= entry
;
7915 const uint32_t ld_private_ss
= 0xe80d8fc0;
7916 if (insn
== ld_private_ss
)
7918 int32_t allocate
= 0;
7922 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7923 if ((insn
& 0xffff0000) == addis_12_1
)
7924 allocate
+= (insn
& 0xffff) << 16;
7925 else if ((insn
& 0xffff0000) == addi_12_1
7926 || (insn
& 0xffff0000) == addi_12_12
)
7927 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7928 else if (insn
!= nop
)
7931 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7933 int extra
= parameters
->options().split_stack_adjust_size();
7935 if (allocate
>= 0 || extra
< 0)
7937 object
->error(_("split-stack stack size overflow at "
7938 "section %u offset %0zx"),
7939 shndx
, static_cast<size_t>(fnoffset
));
7943 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7944 if (insn
!= addis_12_1
)
7946 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7948 insn
= addi_12_12
| (allocate
& 0xffff);
7949 if (insn
!= addi_12_12
)
7951 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7957 insn
= addi_12_1
| (allocate
& 0xffff);
7958 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7961 if (pinsn
!= entry
+ 12)
7962 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7970 if (!object
->has_no_split_stack())
7971 object
->error(_("failed to match split-stack sequence at "
7972 "section %u offset %0zx"),
7973 shndx
, static_cast<size_t>(fnoffset
));
7977 // Scan relocations for a section.
7979 template<int size
, bool big_endian
>
7981 Target_powerpc
<size
, big_endian
>::scan_relocs(
7982 Symbol_table
* symtab
,
7984 Sized_relobj_file
<size
, big_endian
>* object
,
7985 unsigned int data_shndx
,
7986 unsigned int sh_type
,
7987 const unsigned char* prelocs
,
7989 Output_section
* output_section
,
7990 bool needs_special_offset_handling
,
7991 size_t local_symbol_count
,
7992 const unsigned char* plocal_symbols
)
7994 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7995 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7998 if (!this->plt_localentry0_init_
)
8000 bool plt_localentry0
= false;
8002 && this->abiversion() >= 2)
8004 if (parameters
->options().user_set_plt_localentry())
8005 plt_localentry0
= parameters
->options().plt_localentry();
8007 && symtab
->lookup("GLIBC_2.26", NULL
) == NULL
)
8008 gold_warning(_("--plt-localentry is especially dangerous without "
8009 "ld.so support to detect ABI violations"));
8011 this->plt_localentry0_
= plt_localentry0
;
8012 this->plt_localentry0_init_
= true;
8015 if (sh_type
== elfcpp::SHT_REL
)
8017 gold_error(_("%s: unsupported REL reloc section"),
8018 object
->name().c_str());
8022 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
8031 needs_special_offset_handling
,
8036 // Functor class for processing the global symbol table.
8037 // Removes symbols defined on discarded opd entries.
8039 template<bool big_endian
>
8040 class Global_symbol_visitor_opd
8043 Global_symbol_visitor_opd()
8047 operator()(Sized_symbol
<64>* sym
)
8049 if (sym
->has_symtab_index()
8050 || sym
->source() != Symbol::FROM_OBJECT
8051 || !sym
->in_real_elf())
8054 if (sym
->object()->is_dynamic())
8057 Powerpc_relobj
<64, big_endian
>* symobj
8058 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
8059 if (symobj
->opd_shndx() == 0)
8063 unsigned int shndx
= sym
->shndx(&is_ordinary
);
8064 if (shndx
== symobj
->opd_shndx()
8065 && symobj
->get_opd_discard(sym
->value()))
8067 sym
->set_undefined();
8068 sym
->set_visibility(elfcpp::STV_DEFAULT
);
8069 sym
->set_is_defined_in_discarded_section();
8070 sym
->set_symtab_index(-1U);
8075 template<int size
, bool big_endian
>
8077 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
8079 Symbol_table
* symtab
)
8083 Output_data_save_res
<size
, big_endian
>* savres
8084 = new Output_data_save_res
<size
, big_endian
>(symtab
);
8085 this->savres_section_
= savres
;
8086 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8087 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
8088 savres
, ORDER_TEXT
, false);
8092 // Sort linker created .got section first (for the header), then input
8093 // sections belonging to files using small model code.
8095 template<bool big_endian
>
8096 class Sort_toc_sections
8100 operator()(const Output_section::Input_section
& is1
,
8101 const Output_section::Input_section
& is2
) const
8103 if (!is1
.is_input_section() && is2
.is_input_section())
8106 = (is1
.is_input_section()
8107 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
8108 ->has_small_toc_reloc()));
8110 = (is2
.is_input_section()
8111 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
8112 ->has_small_toc_reloc()));
8113 return small1
&& !small2
;
8117 // Finalize the sections.
8119 template<int size
, bool big_endian
>
8121 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
8123 const Input_objects
*,
8124 Symbol_table
* symtab
)
8126 if (parameters
->doing_static_link())
8128 // At least some versions of glibc elf-init.o have a strong
8129 // reference to __rela_iplt marker syms. A weak ref would be
8131 if (this->iplt_
!= NULL
)
8133 Reloc_section
* rel
= this->iplt_
->rel_plt();
8134 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
8135 Symbol_table::PREDEFINED
, rel
, 0, 0,
8136 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8137 elfcpp::STV_HIDDEN
, 0, false, true);
8138 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
8139 Symbol_table::PREDEFINED
, rel
, 0, 0,
8140 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8141 elfcpp::STV_HIDDEN
, 0, true, true);
8145 symtab
->define_as_constant("__rela_iplt_start", NULL
,
8146 Symbol_table::PREDEFINED
, 0, 0,
8147 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8148 elfcpp::STV_HIDDEN
, 0, true, false);
8149 symtab
->define_as_constant("__rela_iplt_end", NULL
,
8150 Symbol_table::PREDEFINED
, 0, 0,
8151 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8152 elfcpp::STV_HIDDEN
, 0, true, false);
8158 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
8159 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
8161 if (!parameters
->options().relocatable())
8163 this->define_save_restore_funcs(layout
, symtab
);
8165 // Annoyingly, we need to make these sections now whether or
8166 // not we need them. If we delay until do_relax then we
8167 // need to mess with the relaxation machinery checkpointing.
8168 this->got_section(symtab
, layout
);
8169 this->make_brlt_section(layout
);
8171 if (parameters
->options().toc_sort())
8173 Output_section
* os
= this->got_
->output_section();
8174 if (os
!= NULL
&& os
->input_sections().size() > 1)
8175 std::stable_sort(os
->input_sections().begin(),
8176 os
->input_sections().end(),
8177 Sort_toc_sections
<big_endian
>());
8182 // Fill in some more dynamic tags.
8183 Output_data_dynamic
* odyn
= layout
->dynamic_data();
8186 const Reloc_section
* rel_plt
= (this->plt_
== NULL
8188 : this->plt_
->rel_plt());
8189 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
8190 this->rela_dyn_
, true, size
== 32);
8194 if (this->got_
!= NULL
)
8196 this->got_
->finalize_data_size();
8197 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
8198 this->got_
, this->got_
->g_o_t());
8200 if (this->has_tls_get_addr_opt_
)
8201 odyn
->add_constant(elfcpp::DT_PPC_OPT
, elfcpp::PPC_OPT_TLS
);
8205 if (this->glink_
!= NULL
)
8207 this->glink_
->finalize_data_size();
8208 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
8210 (this->glink_
->pltresolve_size()
8213 if (this->has_localentry0_
|| this->has_tls_get_addr_opt_
)
8214 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
8215 ((this->has_localentry0_
8216 ? elfcpp::PPC64_OPT_LOCALENTRY
: 0)
8217 | (this->has_tls_get_addr_opt_
8218 ? elfcpp::PPC64_OPT_TLS
: 0)));
8222 // Emit any relocs we saved in an attempt to avoid generating COPY
8224 if (this->copy_relocs_
.any_saved_relocs())
8225 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
8228 // Emit any saved relocs, and mark toc entries using any of these
8229 // relocs as not optimizable.
8231 template<int sh_type
, int size
, bool big_endian
>
8233 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
8234 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
8237 && parameters
->options().toc_optimize())
8239 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8240 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8241 p
!= this->entries_
.end();
8244 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
8247 // If the symbol is no longer defined in a dynamic object,
8248 // then we emitted a COPY relocation. If it is still
8249 // dynamic then we'll need dynamic relocations and thus
8250 // can't optimize toc entries.
8251 if (entry
.sym_
->is_from_dynobj())
8253 Powerpc_relobj
<size
, big_endian
>* ppc_object
8254 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
8255 if (entry
.shndx_
== ppc_object
->toc_shndx())
8256 ppc_object
->set_no_toc_opt(entry
.address_
);
8261 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
8264 // Return the value to use for a branch relocation.
8266 template<int size
, bool big_endian
>
8268 Target_powerpc
<size
, big_endian
>::symval_for_branch(
8269 const Symbol_table
* symtab
,
8270 const Sized_symbol
<size
>* gsym
,
8271 Powerpc_relobj
<size
, big_endian
>* object
,
8273 unsigned int *dest_shndx
)
8275 if (size
== 32 || this->abiversion() >= 2)
8279 // If the symbol is defined in an opd section, ie. is a function
8280 // descriptor, use the function descriptor code entry address
8281 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
8283 && (gsym
->source() != Symbol::FROM_OBJECT
8284 || gsym
->object()->is_dynamic()))
8287 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
8288 unsigned int shndx
= symobj
->opd_shndx();
8291 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
8292 if (opd_addr
== invalid_address
)
8294 opd_addr
+= symobj
->output_section_address(shndx
);
8295 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
8298 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
8299 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
8302 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
8303 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
8304 *dest_shndx
= folded
.second
;
8306 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
8307 if (sec_addr
== invalid_address
)
8310 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
8311 *value
= sec_addr
+ sec_off
;
8316 // Perform a relocation.
8318 template<int size
, bool big_endian
>
8320 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
8321 const Relocate_info
<size
, big_endian
>* relinfo
,
8323 Target_powerpc
* target
,
8326 const unsigned char* preloc
,
8327 const Sized_symbol
<size
>* gsym
,
8328 const Symbol_value
<size
>* psymval
,
8329 unsigned char* view
,
8331 section_size_type view_size
)
8336 if (target
->replace_tls_get_addr(gsym
))
8337 gsym
= static_cast<const Sized_symbol
<size
>*>(target
->tls_get_addr_opt());
8339 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
8340 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
8341 switch (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
))
8343 case Track_tls::NOT_EXPECTED
:
8344 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8345 _("__tls_get_addr call lacks marker reloc"));
8347 case Track_tls::EXPECTED
:
8348 // We have already complained.
8350 case Track_tls::SKIP
:
8352 case Track_tls::NORMAL
:
8356 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8357 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8358 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8359 // Offset from start of insn to d-field reloc.
8360 const int d_offset
= big_endian
? 2 : 0;
8362 Powerpc_relobj
<size
, big_endian
>* const object
8363 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8365 bool has_stub_value
= false;
8366 bool localentry0
= false;
8367 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8369 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8370 : object
->local_has_plt_offset(r_sym
))
8371 && (!psymval
->is_ifunc_symbol()
8372 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8376 && target
->abiversion() >= 2
8377 && !parameters
->options().output_is_position_independent()
8378 && !is_branch_reloc(r_type
))
8380 Address off
= target
->glink_section()->find_global_entry(gsym
);
8381 if (off
!= invalid_address
)
8383 value
= target
->glink_section()->global_entry_address() + off
;
8384 has_stub_value
= true;
8389 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
8390 if (target
->stub_tables().size() == 1)
8391 stub_table
= target
->stub_tables()[0];
8392 if (stub_table
== NULL
8395 && !parameters
->options().output_is_position_independent()
8396 && !is_branch_reloc(r_type
)))
8397 stub_table
= object
->stub_table(relinfo
->data_shndx
);
8398 if (stub_table
== NULL
)
8400 // This is a ref from a data section to an ifunc symbol,
8401 // or a non-branch reloc for which we always want to use
8402 // one set of stubs for resolving function addresses.
8403 if (target
->stub_tables().size() != 0)
8404 stub_table
= target
->stub_tables()[0];
8406 if (stub_table
!= NULL
)
8408 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8410 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8411 rela
.get_r_addend());
8413 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8414 rela
.get_r_addend());
8417 value
= stub_table
->stub_address() + ent
->off_
;
8418 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8419 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8420 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8423 && relnum
+ 1 < reloc_count
)
8425 Reltype
next_rela(preloc
+ reloc_size
);
8426 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8427 == elfcpp::R_PPC64_TOCSAVE
8428 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8431 localentry0
= ent
->localentry0_
;
8432 has_stub_value
= true;
8436 // We don't care too much about bogus debug references to
8437 // non-local functions, but otherwise there had better be a plt
8438 // call stub or global entry stub as appropriate.
8439 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
8442 if (r_type
== elfcpp::R_POWERPC_GOT16
8443 || r_type
== elfcpp::R_POWERPC_GOT16_LO
8444 || r_type
== elfcpp::R_POWERPC_GOT16_HI
8445 || r_type
== elfcpp::R_POWERPC_GOT16_HA
8446 || r_type
== elfcpp::R_PPC64_GOT16_DS
8447 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
8451 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
8452 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
8456 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
8457 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
8459 value
-= target
->got_section()->got_base_offset(object
);
8461 else if (r_type
== elfcpp::R_PPC64_TOC
)
8463 value
= (target
->got_section()->output_section()->address()
8464 + object
->toc_base_offset());
8466 else if (gsym
!= NULL
8467 && (r_type
== elfcpp::R_POWERPC_REL24
8468 || r_type
== elfcpp::R_PPC_PLTREL24
)
8473 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
8474 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
8475 bool can_plt_call
= localentry0
|| target
->is_tls_get_addr_opt(gsym
);
8476 if (!can_plt_call
&& rela
.get_r_offset() + 8 <= view_size
)
8478 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
8479 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
8482 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
8484 elfcpp::Swap
<32, big_endian
>::
8485 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
8486 can_plt_call
= true;
8491 // If we don't have a branch and link followed by a nop,
8492 // we can't go via the plt because there is no place to
8493 // put a toc restoring instruction.
8494 // Unless we know we won't be returning.
8495 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
8496 can_plt_call
= true;
8500 // g++ as of 20130507 emits self-calls without a
8501 // following nop. This is arguably wrong since we have
8502 // conflicting information. On the one hand a global
8503 // symbol and on the other a local call sequence, but
8504 // don't error for this special case.
8505 // It isn't possible to cheaply verify we have exactly
8506 // such a call. Allow all calls to the same section.
8508 Address code
= value
;
8509 if (gsym
->source() == Symbol::FROM_OBJECT
8510 && gsym
->object() == object
)
8512 unsigned int dest_shndx
= 0;
8513 if (target
->abiversion() < 2)
8515 Address addend
= rela
.get_r_addend();
8516 code
= psymval
->value(object
, addend
);
8517 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8518 &code
, &dest_shndx
);
8521 if (dest_shndx
== 0)
8522 dest_shndx
= gsym
->shndx(&is_ordinary
);
8523 ok
= dest_shndx
== relinfo
->data_shndx
;
8527 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8528 _("call lacks nop, can't restore toc; "
8529 "recompile with -fPIC"));
8535 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8536 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8537 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8538 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8540 // First instruction of a global dynamic sequence, arg setup insn.
8541 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8542 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8543 enum Got_type got_type
= GOT_TYPE_STANDARD
;
8544 if (tls_type
== tls::TLSOPT_NONE
)
8545 got_type
= GOT_TYPE_TLSGD
;
8546 else if (tls_type
== tls::TLSOPT_TO_IE
)
8547 got_type
= GOT_TYPE_TPREL
;
8548 if (got_type
!= GOT_TYPE_STANDARD
)
8552 gold_assert(gsym
->has_got_offset(got_type
));
8553 value
= gsym
->got_offset(got_type
);
8557 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
8558 value
= object
->local_got_offset(r_sym
, got_type
);
8560 value
-= target
->got_section()->got_base_offset(object
);
8562 if (tls_type
== tls::TLSOPT_TO_IE
)
8564 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8565 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8567 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8568 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8569 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
8571 insn
|= 32 << 26; // lwz
8573 insn
|= 58 << 26; // ld
8574 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8576 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8577 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8579 else if (tls_type
== tls::TLSOPT_TO_LE
)
8581 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8582 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8584 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8585 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8586 insn
&= (1 << 26) - (1 << 21); // extract rt
8591 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8592 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8593 value
= psymval
->value(object
, rela
.get_r_addend());
8597 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8599 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8600 r_type
= elfcpp::R_POWERPC_NONE
;
8604 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8605 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8606 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8607 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8609 // First instruction of a local dynamic sequence, arg setup insn.
8610 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8611 if (tls_type
== tls::TLSOPT_NONE
)
8613 value
= target
->tlsld_got_offset();
8614 value
-= target
->got_section()->got_base_offset(object
);
8618 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8619 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8620 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8622 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8623 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8624 insn
&= (1 << 26) - (1 << 21); // extract rt
8629 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8630 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8635 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8637 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8638 r_type
= elfcpp::R_POWERPC_NONE
;
8642 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
8643 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
8644 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
8645 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
8647 // Accesses relative to a local dynamic sequence address,
8648 // no optimisation here.
8651 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
8652 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
8656 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
8657 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
8659 value
-= target
->got_section()->got_base_offset(object
);
8661 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8662 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8663 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8664 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8666 // First instruction of initial exec sequence.
8667 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8668 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8669 if (tls_type
== tls::TLSOPT_NONE
)
8673 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
8674 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
8678 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
8679 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
8681 value
-= target
->got_section()->got_base_offset(object
);
8685 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8686 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8687 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8689 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8690 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8691 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
8696 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8697 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8698 value
= psymval
->value(object
, rela
.get_r_addend());
8702 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8704 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8705 r_type
= elfcpp::R_POWERPC_NONE
;
8709 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8710 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8712 // Second instruction of a global dynamic sequence,
8713 // the __tls_get_addr call
8714 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8715 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8716 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8717 if (tls_type
!= tls::TLSOPT_NONE
)
8719 if (tls_type
== tls::TLSOPT_TO_IE
)
8721 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8722 Insn insn
= add_3_3_13
;
8725 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8726 r_type
= elfcpp::R_POWERPC_NONE
;
8730 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8731 Insn insn
= addi_3_3
;
8732 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8733 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8735 value
= psymval
->value(object
, rela
.get_r_addend());
8737 this->skip_next_tls_get_addr_call();
8740 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8741 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8743 // Second instruction of a local dynamic sequence,
8744 // the __tls_get_addr call
8745 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8746 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8747 if (tls_type
== tls::TLSOPT_TO_LE
)
8749 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8750 Insn insn
= addi_3_3
;
8751 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8752 this->skip_next_tls_get_addr_call();
8753 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8758 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8760 // Second instruction of an initial exec sequence
8761 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8762 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8763 if (tls_type
== tls::TLSOPT_TO_LE
)
8765 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8766 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8767 unsigned int reg
= size
== 32 ? 2 : 13;
8768 insn
= at_tls_transform(insn
, reg
);
8769 gold_assert(insn
!= 0);
8770 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8771 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8773 value
= psymval
->value(object
, rela
.get_r_addend());
8776 else if (!has_stub_value
)
8779 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8780 addend
= rela
.get_r_addend();
8781 value
= psymval
->value(object
, addend
);
8782 if (size
== 64 && is_branch_reloc(r_type
))
8784 if (target
->abiversion() >= 2)
8787 value
+= object
->ppc64_local_entry_offset(gsym
);
8789 value
+= object
->ppc64_local_entry_offset(r_sym
);
8793 unsigned int dest_shndx
;
8794 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8795 &value
, &dest_shndx
);
8798 Address max_branch_offset
= max_branch_delta(r_type
);
8799 if (max_branch_offset
!= 0
8800 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8802 Stub_table
<size
, big_endian
>* stub_table
8803 = object
->stub_table(relinfo
->data_shndx
);
8804 if (stub_table
!= NULL
)
8806 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8807 if (off
!= invalid_address
)
8809 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8811 has_stub_value
= true;
8819 case elfcpp::R_PPC64_REL64
:
8820 case elfcpp::R_POWERPC_REL32
:
8821 case elfcpp::R_POWERPC_REL24
:
8822 case elfcpp::R_PPC_PLTREL24
:
8823 case elfcpp::R_PPC_LOCAL24PC
:
8824 case elfcpp::R_POWERPC_REL16
:
8825 case elfcpp::R_POWERPC_REL16_LO
:
8826 case elfcpp::R_POWERPC_REL16_HI
:
8827 case elfcpp::R_POWERPC_REL16_HA
:
8828 case elfcpp::R_POWERPC_REL16DX_HA
:
8829 case elfcpp::R_POWERPC_REL14
:
8830 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8831 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8835 case elfcpp::R_PPC64_TOC16
:
8836 case elfcpp::R_PPC64_TOC16_LO
:
8837 case elfcpp::R_PPC64_TOC16_HI
:
8838 case elfcpp::R_PPC64_TOC16_HA
:
8839 case elfcpp::R_PPC64_TOC16_DS
:
8840 case elfcpp::R_PPC64_TOC16_LO_DS
:
8841 // Subtract the TOC base address.
8842 value
-= (target
->got_section()->output_section()->address()
8843 + object
->toc_base_offset());
8846 case elfcpp::R_POWERPC_SECTOFF
:
8847 case elfcpp::R_POWERPC_SECTOFF_LO
:
8848 case elfcpp::R_POWERPC_SECTOFF_HI
:
8849 case elfcpp::R_POWERPC_SECTOFF_HA
:
8850 case elfcpp::R_PPC64_SECTOFF_DS
:
8851 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8853 value
-= os
->address();
8856 case elfcpp::R_PPC64_TPREL16_DS
:
8857 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8858 case elfcpp::R_PPC64_TPREL16_HIGH
:
8859 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8861 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8864 case elfcpp::R_POWERPC_TPREL16
:
8865 case elfcpp::R_POWERPC_TPREL16_LO
:
8866 case elfcpp::R_POWERPC_TPREL16_HI
:
8867 case elfcpp::R_POWERPC_TPREL16_HA
:
8868 case elfcpp::R_POWERPC_TPREL
:
8869 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8870 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8871 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8872 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8873 // tls symbol values are relative to tls_segment()->vaddr()
8877 case elfcpp::R_PPC64_DTPREL16_DS
:
8878 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8879 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8880 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8881 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8882 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8884 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8885 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8888 case elfcpp::R_POWERPC_DTPREL16
:
8889 case elfcpp::R_POWERPC_DTPREL16_LO
:
8890 case elfcpp::R_POWERPC_DTPREL16_HI
:
8891 case elfcpp::R_POWERPC_DTPREL16_HA
:
8892 case elfcpp::R_POWERPC_DTPREL
:
8893 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8894 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8895 // tls symbol values are relative to tls_segment()->vaddr()
8896 value
-= dtp_offset
;
8899 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8901 value
+= object
->ppc64_local_entry_offset(gsym
);
8903 value
+= object
->ppc64_local_entry_offset(r_sym
);
8910 Insn branch_bit
= 0;
8913 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8914 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8915 branch_bit
= 1 << 21;
8917 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8918 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8920 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8921 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8924 if (this->is_isa_v2
)
8926 // Set 'a' bit. This is 0b00010 in BO field for branch
8927 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8928 // for branch on CTR insns (BO == 1a00t or 1a01t).
8929 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8931 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8938 // Invert 'y' bit if not the default.
8939 if (static_cast<Signed_address
>(value
) < 0)
8942 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8957 // Multi-instruction sequences that access the GOT/TOC can
8958 // be optimized, eg.
8959 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8960 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8962 // addis ra,r2,0; addi rb,ra,x@toc@l;
8963 // to nop; addi rb,r2,x@toc;
8964 // FIXME: the @got sequence shown above is not yet
8965 // optimized. Note that gcc as of 2017-01-07 doesn't use
8966 // the ELF @got relocs except for TLS, instead using the
8967 // PowerOpen variant of a compiler managed GOT (called TOC).
8968 // The PowerOpen TOC sequence equivalent to the first
8969 // example is optimized.
8970 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8971 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8972 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8973 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8974 case elfcpp::R_POWERPC_GOT16_HA
:
8975 case elfcpp::R_PPC64_TOC16_HA
:
8976 if (parameters
->options().toc_optimize())
8978 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8979 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8980 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8981 && object
->make_toc_relative(target
, &value
))
8983 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8984 == ((15u << 26) | (2 << 16)));
8986 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8987 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8988 && value
+ 0x8000 < 0x10000)
8990 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8996 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8997 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8998 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8999 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9000 case elfcpp::R_POWERPC_GOT16_LO
:
9001 case elfcpp::R_PPC64_GOT16_LO_DS
:
9002 case elfcpp::R_PPC64_TOC16_LO
:
9003 case elfcpp::R_PPC64_TOC16_LO_DS
:
9004 if (parameters
->options().toc_optimize())
9006 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9007 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9008 bool changed
= false;
9009 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
9010 && object
->make_toc_relative(target
, &value
))
9012 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
9013 insn
^= (14u << 26) ^ (58u << 26);
9014 r_type
= elfcpp::R_PPC64_TOC16_LO
;
9017 if (ok_lo_toc_insn(insn
, r_type
)
9018 && value
+ 0x8000 < 0x10000)
9020 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
9022 // Transform addic to addi when we change reg.
9023 insn
&= ~((0x3f << 26) | (0x1f << 16));
9024 insn
|= (14u << 26) | (2 << 16);
9028 insn
&= ~(0x1f << 16);
9034 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9038 case elfcpp::R_POWERPC_TPREL16_HA
:
9039 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9041 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9042 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9043 if ((insn
& ((0x3f << 26) | 0x1f << 16))
9044 != ((15u << 26) | ((size
== 32 ? 2 : 13) << 16)))
9048 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9054 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9056 // R_PPC_TLSGD, R_PPC_TLSLD
9059 case elfcpp::R_POWERPC_TPREL16_LO
:
9060 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9062 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9063 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9064 insn
&= ~(0x1f << 16);
9065 insn
|= (size
== 32 ? 2 : 13) << 16;
9066 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9070 case elfcpp::R_PPC64_ENTRY
:
9071 value
= (target
->got_section()->output_section()->address()
9072 + object
->toc_base_offset());
9073 if (value
+ 0x80008000 <= 0xffffffff
9074 && !parameters
->options().output_is_position_independent())
9076 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9077 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9078 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9080 if ((insn1
& ~0xfffc) == ld_2_12
9081 && insn2
== add_2_2_12
)
9083 insn1
= lis_2
+ ha(value
);
9084 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9085 insn2
= addi_2_2
+ l(value
);
9086 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9093 if (value
+ 0x80008000 <= 0xffffffff)
9095 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9096 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9097 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9099 if ((insn1
& ~0xfffc) == ld_2_12
9100 && insn2
== add_2_2_12
)
9102 insn1
= addis_2_12
+ ha(value
);
9103 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9104 insn2
= addi_2_2
+ l(value
);
9105 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9112 case elfcpp::R_POWERPC_REL16_LO
:
9113 // If we are generating a non-PIC executable, edit
9114 // 0: addis 2,12,.TOC.-0b@ha
9115 // addi 2,2,.TOC.-0b@l
9116 // used by ELFv2 global entry points to set up r2, to
9119 // if .TOC. is in range. */
9120 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
9123 && target
->abiversion() >= 2
9124 && !parameters
->options().output_is_position_independent()
9125 && rela
.get_r_addend() == d_offset
+ 4
9127 && strcmp(gsym
->name(), ".TOC.") == 0)
9129 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9130 Reltype
prev_rela(preloc
- reloc_size
);
9131 if ((prev_rela
.get_r_info()
9132 == elfcpp::elf_r_info
<size
>(r_sym
,
9133 elfcpp::R_POWERPC_REL16_HA
))
9134 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
9135 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
9137 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9138 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
9139 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9141 if ((insn1
& 0xffff0000) == addis_2_12
9142 && (insn2
& 0xffff0000) == addi_2_2
)
9144 insn1
= lis_2
+ ha(value
+ address
- 4);
9145 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
9146 insn2
= addi_2_2
+ l(value
+ address
- 4);
9147 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
9150 relinfo
->rr
->set_strategy(relnum
- 1,
9151 Relocatable_relocs::RELOC_SPECIAL
);
9152 relinfo
->rr
->set_strategy(relnum
,
9153 Relocatable_relocs::RELOC_SPECIAL
);
9163 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
9164 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
9167 case elfcpp::R_POWERPC_ADDR32
:
9168 case elfcpp::R_POWERPC_UADDR32
:
9170 overflow
= Reloc::CHECK_BITFIELD
;
9173 case elfcpp::R_POWERPC_REL32
:
9174 case elfcpp::R_POWERPC_REL16DX_HA
:
9176 overflow
= Reloc::CHECK_SIGNED
;
9179 case elfcpp::R_POWERPC_UADDR16
:
9180 overflow
= Reloc::CHECK_BITFIELD
;
9183 case elfcpp::R_POWERPC_ADDR16
:
9184 // We really should have three separate relocations,
9185 // one for 16-bit data, one for insns with 16-bit signed fields,
9186 // and one for insns with 16-bit unsigned fields.
9187 overflow
= Reloc::CHECK_BITFIELD
;
9188 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
9189 overflow
= Reloc::CHECK_LOW_INSN
;
9192 case elfcpp::R_POWERPC_ADDR16_HI
:
9193 case elfcpp::R_POWERPC_ADDR16_HA
:
9194 case elfcpp::R_POWERPC_GOT16_HI
:
9195 case elfcpp::R_POWERPC_GOT16_HA
:
9196 case elfcpp::R_POWERPC_PLT16_HI
:
9197 case elfcpp::R_POWERPC_PLT16_HA
:
9198 case elfcpp::R_POWERPC_SECTOFF_HI
:
9199 case elfcpp::R_POWERPC_SECTOFF_HA
:
9200 case elfcpp::R_PPC64_TOC16_HI
:
9201 case elfcpp::R_PPC64_TOC16_HA
:
9202 case elfcpp::R_PPC64_PLTGOT16_HI
:
9203 case elfcpp::R_PPC64_PLTGOT16_HA
:
9204 case elfcpp::R_POWERPC_TPREL16_HI
:
9205 case elfcpp::R_POWERPC_TPREL16_HA
:
9206 case elfcpp::R_POWERPC_DTPREL16_HI
:
9207 case elfcpp::R_POWERPC_DTPREL16_HA
:
9208 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9209 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9210 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9211 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9212 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9213 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9214 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9215 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9216 case elfcpp::R_POWERPC_REL16_HI
:
9217 case elfcpp::R_POWERPC_REL16_HA
:
9219 overflow
= Reloc::CHECK_HIGH_INSN
;
9222 case elfcpp::R_POWERPC_REL16
:
9223 case elfcpp::R_PPC64_TOC16
:
9224 case elfcpp::R_POWERPC_GOT16
:
9225 case elfcpp::R_POWERPC_SECTOFF
:
9226 case elfcpp::R_POWERPC_TPREL16
:
9227 case elfcpp::R_POWERPC_DTPREL16
:
9228 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9229 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9230 case elfcpp::R_POWERPC_GOT_TPREL16
:
9231 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9232 overflow
= Reloc::CHECK_LOW_INSN
;
9235 case elfcpp::R_POWERPC_ADDR24
:
9236 case elfcpp::R_POWERPC_ADDR14
:
9237 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9238 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9239 case elfcpp::R_PPC64_ADDR16_DS
:
9240 case elfcpp::R_POWERPC_REL24
:
9241 case elfcpp::R_PPC_PLTREL24
:
9242 case elfcpp::R_PPC_LOCAL24PC
:
9243 case elfcpp::R_PPC64_TPREL16_DS
:
9244 case elfcpp::R_PPC64_DTPREL16_DS
:
9245 case elfcpp::R_PPC64_TOC16_DS
:
9246 case elfcpp::R_PPC64_GOT16_DS
:
9247 case elfcpp::R_PPC64_SECTOFF_DS
:
9248 case elfcpp::R_POWERPC_REL14
:
9249 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9250 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9251 overflow
= Reloc::CHECK_SIGNED
;
9255 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9258 if (overflow
== Reloc::CHECK_LOW_INSN
9259 || overflow
== Reloc::CHECK_HIGH_INSN
)
9261 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9263 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
9264 overflow
= Reloc::CHECK_BITFIELD
;
9265 else if (overflow
== Reloc::CHECK_LOW_INSN
9266 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
9267 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
9268 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
9269 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
9270 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
9271 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
9272 overflow
= Reloc::CHECK_UNSIGNED
;
9274 overflow
= Reloc::CHECK_SIGNED
;
9277 bool maybe_dq_reloc
= false;
9278 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
9279 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
9282 case elfcpp::R_POWERPC_NONE
:
9283 case elfcpp::R_POWERPC_TLS
:
9284 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
9285 case elfcpp::R_POWERPC_GNU_VTENTRY
:
9288 case elfcpp::R_PPC64_ADDR64
:
9289 case elfcpp::R_PPC64_REL64
:
9290 case elfcpp::R_PPC64_TOC
:
9291 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9292 Reloc::addr64(view
, value
);
9295 case elfcpp::R_POWERPC_TPREL
:
9296 case elfcpp::R_POWERPC_DTPREL
:
9298 Reloc::addr64(view
, value
);
9300 status
= Reloc::addr32(view
, value
, overflow
);
9303 case elfcpp::R_PPC64_UADDR64
:
9304 Reloc::addr64_u(view
, value
);
9307 case elfcpp::R_POWERPC_ADDR32
:
9308 status
= Reloc::addr32(view
, value
, overflow
);
9311 case elfcpp::R_POWERPC_REL32
:
9312 case elfcpp::R_POWERPC_UADDR32
:
9313 status
= Reloc::addr32_u(view
, value
, overflow
);
9316 case elfcpp::R_POWERPC_ADDR24
:
9317 case elfcpp::R_POWERPC_REL24
:
9318 case elfcpp::R_PPC_PLTREL24
:
9319 case elfcpp::R_PPC_LOCAL24PC
:
9320 status
= Reloc::addr24(view
, value
, overflow
);
9323 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9324 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9325 case elfcpp::R_POWERPC_GOT_TPREL16
:
9326 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9329 // On ppc64 these are all ds form
9330 maybe_dq_reloc
= true;
9334 case elfcpp::R_POWERPC_ADDR16
:
9335 case elfcpp::R_POWERPC_REL16
:
9336 case elfcpp::R_PPC64_TOC16
:
9337 case elfcpp::R_POWERPC_GOT16
:
9338 case elfcpp::R_POWERPC_SECTOFF
:
9339 case elfcpp::R_POWERPC_TPREL16
:
9340 case elfcpp::R_POWERPC_DTPREL16
:
9341 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9342 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9343 case elfcpp::R_POWERPC_ADDR16_LO
:
9344 case elfcpp::R_POWERPC_REL16_LO
:
9345 case elfcpp::R_PPC64_TOC16_LO
:
9346 case elfcpp::R_POWERPC_GOT16_LO
:
9347 case elfcpp::R_POWERPC_SECTOFF_LO
:
9348 case elfcpp::R_POWERPC_TPREL16_LO
:
9349 case elfcpp::R_POWERPC_DTPREL16_LO
:
9350 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9351 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9353 status
= Reloc::addr16(view
, value
, overflow
);
9355 maybe_dq_reloc
= true;
9358 case elfcpp::R_POWERPC_UADDR16
:
9359 status
= Reloc::addr16_u(view
, value
, overflow
);
9362 case elfcpp::R_PPC64_ADDR16_HIGH
:
9363 case elfcpp::R_PPC64_TPREL16_HIGH
:
9364 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9366 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
9369 case elfcpp::R_POWERPC_ADDR16_HI
:
9370 case elfcpp::R_POWERPC_REL16_HI
:
9371 case elfcpp::R_PPC64_TOC16_HI
:
9372 case elfcpp::R_POWERPC_GOT16_HI
:
9373 case elfcpp::R_POWERPC_SECTOFF_HI
:
9374 case elfcpp::R_POWERPC_TPREL16_HI
:
9375 case elfcpp::R_POWERPC_DTPREL16_HI
:
9376 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9377 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9378 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9379 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9380 Reloc::addr16_hi(view
, value
);
9383 case elfcpp::R_PPC64_ADDR16_HIGHA
:
9384 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9385 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9387 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
9390 case elfcpp::R_POWERPC_ADDR16_HA
:
9391 case elfcpp::R_POWERPC_REL16_HA
:
9392 case elfcpp::R_PPC64_TOC16_HA
:
9393 case elfcpp::R_POWERPC_GOT16_HA
:
9394 case elfcpp::R_POWERPC_SECTOFF_HA
:
9395 case elfcpp::R_POWERPC_TPREL16_HA
:
9396 case elfcpp::R_POWERPC_DTPREL16_HA
:
9397 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9398 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9399 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9400 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9401 Reloc::addr16_ha(view
, value
);
9404 case elfcpp::R_POWERPC_REL16DX_HA
:
9405 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
9408 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9410 // R_PPC_EMB_NADDR16_LO
9413 case elfcpp::R_PPC64_ADDR16_HIGHER
:
9414 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9415 Reloc::addr16_hi2(view
, value
);
9418 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9420 // R_PPC_EMB_NADDR16_HI
9423 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
9424 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9425 Reloc::addr16_ha2(view
, value
);
9428 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9430 // R_PPC_EMB_NADDR16_HA
9433 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
9434 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9435 Reloc::addr16_hi3(view
, value
);
9438 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9443 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
9444 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9445 Reloc::addr16_ha3(view
, value
);
9448 case elfcpp::R_PPC64_DTPREL16_DS
:
9449 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9451 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9454 case elfcpp::R_PPC64_TPREL16_DS
:
9455 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9457 // R_PPC_TLSGD, R_PPC_TLSLD
9460 case elfcpp::R_PPC64_ADDR16_DS
:
9461 case elfcpp::R_PPC64_ADDR16_LO_DS
:
9462 case elfcpp::R_PPC64_TOC16_DS
:
9463 case elfcpp::R_PPC64_TOC16_LO_DS
:
9464 case elfcpp::R_PPC64_GOT16_DS
:
9465 case elfcpp::R_PPC64_GOT16_LO_DS
:
9466 case elfcpp::R_PPC64_SECTOFF_DS
:
9467 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9468 maybe_dq_reloc
= true;
9471 case elfcpp::R_POWERPC_ADDR14
:
9472 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9473 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9474 case elfcpp::R_POWERPC_REL14
:
9475 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9476 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9477 status
= Reloc::addr14(view
, value
, overflow
);
9480 case elfcpp::R_POWERPC_COPY
:
9481 case elfcpp::R_POWERPC_GLOB_DAT
:
9482 case elfcpp::R_POWERPC_JMP_SLOT
:
9483 case elfcpp::R_POWERPC_RELATIVE
:
9484 case elfcpp::R_POWERPC_DTPMOD
:
9485 case elfcpp::R_PPC64_JMP_IREL
:
9486 case elfcpp::R_POWERPC_IRELATIVE
:
9487 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9488 _("unexpected reloc %u in object file"),
9492 case elfcpp::R_PPC64_TOCSAVE
:
9498 Symbol_location loc
;
9499 loc
.object
= relinfo
->object
;
9500 loc
.shndx
= relinfo
->data_shndx
;
9501 loc
.offset
= rela
.get_r_offset();
9502 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
9503 if (p
!= target
->tocsave_loc().end())
9505 // If we've generated plt calls using this tocsave, then
9506 // the nop needs to be changed to save r2.
9507 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9508 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
9509 elfcpp::Swap
<32, big_endian
>::
9510 writeval(iview
, std_2_1
+ target
->stk_toc());
9515 case elfcpp::R_PPC_EMB_SDA2I16
:
9516 case elfcpp::R_PPC_EMB_SDA2REL
:
9519 // R_PPC64_TLSGD, R_PPC64_TLSLD
9522 case elfcpp::R_POWERPC_PLT32
:
9523 case elfcpp::R_POWERPC_PLTREL32
:
9524 case elfcpp::R_POWERPC_PLT16_LO
:
9525 case elfcpp::R_POWERPC_PLT16_HI
:
9526 case elfcpp::R_POWERPC_PLT16_HA
:
9527 case elfcpp::R_PPC_SDAREL16
:
9528 case elfcpp::R_POWERPC_ADDR30
:
9529 case elfcpp::R_PPC64_PLT64
:
9530 case elfcpp::R_PPC64_PLTREL64
:
9531 case elfcpp::R_PPC64_PLTGOT16
:
9532 case elfcpp::R_PPC64_PLTGOT16_LO
:
9533 case elfcpp::R_PPC64_PLTGOT16_HI
:
9534 case elfcpp::R_PPC64_PLTGOT16_HA
:
9535 case elfcpp::R_PPC64_PLT16_LO_DS
:
9536 case elfcpp::R_PPC64_PLTGOT16_DS
:
9537 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
9538 case elfcpp::R_PPC_EMB_RELSDA
:
9539 case elfcpp::R_PPC_TOC16
:
9542 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9543 _("unsupported reloc %u"),
9551 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9553 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
9554 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9555 && (insn
& 3) == 1))
9556 status
= Reloc::addr16_dq(view
, value
, overflow
);
9558 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9559 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9560 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
9561 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
9562 status
= Reloc::addr16_ds(view
, value
, overflow
);
9564 status
= Reloc::addr16(view
, value
, overflow
);
9567 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
9570 && gsym
->is_undefined()
9571 && is_branch_reloc(r_type
))))
9573 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9574 _("relocation overflow"));
9576 gold_info(_("try relinking with a smaller --stub-group-size"));
9582 // Relocate section data.
9584 template<int size
, bool big_endian
>
9586 Target_powerpc
<size
, big_endian
>::relocate_section(
9587 const Relocate_info
<size
, big_endian
>* relinfo
,
9588 unsigned int sh_type
,
9589 const unsigned char* prelocs
,
9591 Output_section
* output_section
,
9592 bool needs_special_offset_handling
,
9593 unsigned char* view
,
9595 section_size_type view_size
,
9596 const Reloc_symbol_changes
* reloc_symbol_changes
)
9598 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
9599 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
9600 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
9601 Powerpc_comdat_behavior
;
9602 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9605 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9607 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
9608 Powerpc_comdat_behavior
, Classify_reloc
>(
9614 needs_special_offset_handling
,
9618 reloc_symbol_changes
);
9621 template<int size
, bool big_endian
>
9622 class Powerpc_scan_relocatable_reloc
9625 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9626 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9627 static const int sh_type
= elfcpp::SHT_RELA
;
9629 // Return the symbol referred to by the relocation.
9630 static inline unsigned int
9631 get_r_sym(const Reltype
* reloc
)
9632 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
9634 // Return the type of the relocation.
9635 static inline unsigned int
9636 get_r_type(const Reltype
* reloc
)
9637 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
9639 // Return the strategy to use for a local symbol which is not a
9640 // section symbol, given the relocation type.
9641 inline Relocatable_relocs::Reloc_strategy
9642 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
9644 if (r_type
== 0 && r_sym
== 0)
9645 return Relocatable_relocs::RELOC_DISCARD
;
9646 return Relocatable_relocs::RELOC_COPY
;
9649 // Return the strategy to use for a local symbol which is a section
9650 // symbol, given the relocation type.
9651 inline Relocatable_relocs::Reloc_strategy
9652 local_section_strategy(unsigned int, Relobj
*)
9654 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
9657 // Return the strategy to use for a global symbol, given the
9658 // relocation type, the object, and the symbol index.
9659 inline Relocatable_relocs::Reloc_strategy
9660 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
9662 if (r_type
== elfcpp::R_PPC_PLTREL24
)
9663 return Relocatable_relocs::RELOC_SPECIAL
;
9664 return Relocatable_relocs::RELOC_COPY
;
9668 // Scan the relocs during a relocatable link.
9670 template<int size
, bool big_endian
>
9672 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
9673 Symbol_table
* symtab
,
9675 Sized_relobj_file
<size
, big_endian
>* object
,
9676 unsigned int data_shndx
,
9677 unsigned int sh_type
,
9678 const unsigned char* prelocs
,
9680 Output_section
* output_section
,
9681 bool needs_special_offset_handling
,
9682 size_t local_symbol_count
,
9683 const unsigned char* plocal_symbols
,
9684 Relocatable_relocs
* rr
)
9686 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
9688 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9690 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
9698 needs_special_offset_handling
,
9704 // Scan the relocs for --emit-relocs.
9706 template<int size
, bool big_endian
>
9708 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
9709 Symbol_table
* symtab
,
9711 Sized_relobj_file
<size
, big_endian
>* object
,
9712 unsigned int data_shndx
,
9713 unsigned int sh_type
,
9714 const unsigned char* prelocs
,
9716 Output_section
* output_section
,
9717 bool needs_special_offset_handling
,
9718 size_t local_symbol_count
,
9719 const unsigned char* plocal_syms
,
9720 Relocatable_relocs
* rr
)
9722 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9724 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
9725 Emit_relocs_strategy
;
9727 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9729 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
9737 needs_special_offset_handling
,
9743 // Emit relocations for a section.
9744 // This is a modified version of the function by the same name in
9745 // target-reloc.h. Using relocate_special_relocatable for
9746 // R_PPC_PLTREL24 would require duplication of the entire body of the
9747 // loop, so we may as well duplicate the whole thing.
9749 template<int size
, bool big_endian
>
9751 Target_powerpc
<size
, big_endian
>::relocate_relocs(
9752 const Relocate_info
<size
, big_endian
>* relinfo
,
9753 unsigned int sh_type
,
9754 const unsigned char* prelocs
,
9756 Output_section
* output_section
,
9757 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
9759 Address view_address
,
9761 unsigned char* reloc_view
,
9762 section_size_type reloc_view_size
)
9764 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9766 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9767 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
9768 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9769 // Offset from start of insn to d-field reloc.
9770 const int d_offset
= big_endian
? 2 : 0;
9772 Powerpc_relobj
<size
, big_endian
>* const object
9773 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
9774 const unsigned int local_count
= object
->local_symbol_count();
9775 unsigned int got2_shndx
= object
->got2_shndx();
9776 Address got2_addend
= 0;
9777 if (got2_shndx
!= 0)
9779 got2_addend
= object
->get_output_section_offset(got2_shndx
);
9780 gold_assert(got2_addend
!= invalid_address
);
9783 const bool relocatable
= parameters
->options().relocatable();
9785 unsigned char* pwrite
= reloc_view
;
9786 bool zap_next
= false;
9787 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
9789 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
9790 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
9793 Reltype
reloc(prelocs
);
9794 Reltype_write
reloc_write(pwrite
);
9796 Address offset
= reloc
.get_r_offset();
9797 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
9798 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
9799 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
9800 const unsigned int orig_r_sym
= r_sym
;
9801 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
9802 = reloc
.get_r_addend();
9803 const Symbol
* gsym
= NULL
;
9807 // We could arrange to discard these and other relocs for
9808 // tls optimised sequences in the strategy methods, but for
9809 // now do as BFD ld does.
9810 r_type
= elfcpp::R_POWERPC_NONE
;
9814 // Get the new symbol index.
9815 Output_section
* os
= NULL
;
9816 if (r_sym
< local_count
)
9820 case Relocatable_relocs::RELOC_COPY
:
9821 case Relocatable_relocs::RELOC_SPECIAL
:
9824 r_sym
= object
->symtab_index(r_sym
);
9825 gold_assert(r_sym
!= -1U);
9829 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9831 // We are adjusting a section symbol. We need to find
9832 // the symbol table index of the section symbol for
9833 // the output section corresponding to input section
9834 // in which this symbol is defined.
9835 gold_assert(r_sym
< local_count
);
9837 unsigned int shndx
=
9838 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9839 gold_assert(is_ordinary
);
9840 os
= object
->output_section(shndx
);
9841 gold_assert(os
!= NULL
);
9842 gold_assert(os
->needs_symtab_index());
9843 r_sym
= os
->symtab_index();
9853 gsym
= object
->global_symbol(r_sym
);
9854 gold_assert(gsym
!= NULL
);
9855 if (gsym
->is_forwarder())
9856 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9858 gold_assert(gsym
->has_symtab_index());
9859 r_sym
= gsym
->symtab_index();
9862 // Get the new offset--the location in the output section where
9863 // this relocation should be applied.
9864 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9865 offset
+= offset_in_output_section
;
9868 section_offset_type sot_offset
=
9869 convert_types
<section_offset_type
, Address
>(offset
);
9870 section_offset_type new_sot_offset
=
9871 output_section
->output_offset(object
, relinfo
->data_shndx
,
9873 gold_assert(new_sot_offset
!= -1);
9874 offset
= new_sot_offset
;
9877 // In an object file, r_offset is an offset within the section.
9878 // In an executable or dynamic object, generated by
9879 // --emit-relocs, r_offset is an absolute address.
9882 offset
+= view_address
;
9883 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9884 offset
-= offset_in_output_section
;
9887 // Handle the reloc addend based on the strategy.
9888 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9890 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9892 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9893 addend
= psymval
->value(object
, addend
);
9894 // In a relocatable link, the symbol value is relative to
9895 // the start of the output section. For a non-relocatable
9896 // link, we need to adjust the addend.
9899 gold_assert(os
!= NULL
);
9900 addend
-= os
->address();
9903 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9907 if (addend
>= 32768)
9908 addend
+= got2_addend
;
9910 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9912 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9915 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9917 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9918 addend
-= d_offset
+ 4;
9926 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9927 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9928 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9929 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9931 // First instruction of a global dynamic sequence,
9933 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9934 switch (this->optimize_tls_gd(final
))
9936 case tls::TLSOPT_TO_IE
:
9937 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9938 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9940 case tls::TLSOPT_TO_LE
:
9941 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9942 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9943 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9946 r_type
= elfcpp::R_POWERPC_NONE
;
9954 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9955 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9956 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9957 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9959 // First instruction of a local dynamic sequence,
9961 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9963 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9964 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9966 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9967 const Output_section
* os
= relinfo
->layout
->tls_segment()
9969 gold_assert(os
!= NULL
);
9970 gold_assert(os
->needs_symtab_index());
9971 r_sym
= os
->symtab_index();
9972 addend
= dtp_offset
;
9976 r_type
= elfcpp::R_POWERPC_NONE
;
9981 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9982 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9983 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9984 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9986 // First instruction of initial exec sequence.
9987 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9988 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9990 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9991 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9992 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9995 r_type
= elfcpp::R_POWERPC_NONE
;
10000 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
10001 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
10003 // Second instruction of a global dynamic sequence,
10004 // the __tls_get_addr call
10005 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10006 switch (this->optimize_tls_gd(final
))
10008 case tls::TLSOPT_TO_IE
:
10009 r_type
= elfcpp::R_POWERPC_NONE
;
10012 case tls::TLSOPT_TO_LE
:
10013 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10014 offset
+= d_offset
;
10021 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
10022 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
10024 // Second instruction of a local dynamic sequence,
10025 // the __tls_get_addr call
10026 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10028 const Output_section
* os
= relinfo
->layout
->tls_segment()
10030 gold_assert(os
!= NULL
);
10031 gold_assert(os
->needs_symtab_index());
10032 r_sym
= os
->symtab_index();
10033 addend
= dtp_offset
;
10034 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10035 offset
+= d_offset
;
10039 else if (r_type
== elfcpp::R_POWERPC_TLS
)
10041 // Second instruction of an initial exec sequence
10042 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10043 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10045 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10046 offset
+= d_offset
;
10051 reloc_write
.put_r_offset(offset
);
10052 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
10053 reloc_write
.put_r_addend(addend
);
10055 pwrite
+= reloc_size
;
10058 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
10059 == reloc_view_size
);
10062 // Return the value to use for a dynamic symbol which requires special
10063 // treatment. This is how we support equality comparisons of function
10064 // pointers across shared library boundaries, as described in the
10065 // processor specific ABI supplement.
10067 template<int size
, bool big_endian
>
10069 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
10073 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
10074 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10075 p
!= this->stub_tables_
.end();
10078 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10079 = (*p
)->find_plt_call_entry(gsym
);
10081 return (*p
)->stub_address() + ent
->off_
;
10084 else if (this->abiversion() >= 2)
10086 Address off
= this->glink_section()->find_global_entry(gsym
);
10087 if (off
!= invalid_address
)
10088 return this->glink_section()->global_entry_address() + off
;
10090 gold_unreachable();
10093 // Return the PLT address to use for a local symbol.
10094 template<int size
, bool big_endian
>
10096 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
10097 const Relobj
* object
,
10098 unsigned int symndx
) const
10102 const Sized_relobj
<size
, big_endian
>* relobj
10103 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
10104 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10105 p
!= this->stub_tables_
.end();
10108 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10109 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
10111 return (*p
)->stub_address() + ent
->off_
;
10114 gold_unreachable();
10117 // Return the PLT address to use for a global symbol.
10118 template<int size
, bool big_endian
>
10120 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
10121 const Symbol
* gsym
) const
10125 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10126 p
!= this->stub_tables_
.end();
10129 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10130 = (*p
)->find_plt_call_entry(gsym
);
10132 return (*p
)->stub_address() + ent
->off_
;
10135 else if (this->abiversion() >= 2)
10137 Address off
= this->glink_section()->find_global_entry(gsym
);
10138 if (off
!= invalid_address
)
10139 return this->glink_section()->global_entry_address() + off
;
10141 gold_unreachable();
10144 // Return the offset to use for the GOT_INDX'th got entry which is
10145 // for a local tls symbol specified by OBJECT, SYMNDX.
10146 template<int size
, bool big_endian
>
10148 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
10149 const Relobj
* object
,
10150 unsigned int symndx
,
10151 unsigned int got_indx
) const
10153 const Powerpc_relobj
<size
, big_endian
>* ppc_object
10154 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
10155 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
10157 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10158 got_type
<= GOT_TYPE_TPREL
;
10159 got_type
= Got_type(got_type
+ 1))
10160 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
10162 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
10163 if (got_type
== GOT_TYPE_TLSGD
)
10165 if (off
== got_indx
* (size
/ 8))
10167 if (got_type
== GOT_TYPE_TPREL
)
10170 return -dtp_offset
;
10174 gold_unreachable();
10177 // Return the offset to use for the GOT_INDX'th got entry which is
10178 // for global tls symbol GSYM.
10179 template<int size
, bool big_endian
>
10181 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
10183 unsigned int got_indx
) const
10185 if (gsym
->type() == elfcpp::STT_TLS
)
10187 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10188 got_type
<= GOT_TYPE_TPREL
;
10189 got_type
= Got_type(got_type
+ 1))
10190 if (gsym
->has_got_offset(got_type
))
10192 unsigned int off
= gsym
->got_offset(got_type
);
10193 if (got_type
== GOT_TYPE_TLSGD
)
10195 if (off
== got_indx
* (size
/ 8))
10197 if (got_type
== GOT_TYPE_TPREL
)
10200 return -dtp_offset
;
10204 gold_unreachable();
10207 // The selector for powerpc object files.
10209 template<int size
, bool big_endian
>
10210 class Target_selector_powerpc
: public Target_selector
10213 Target_selector_powerpc()
10214 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
10217 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
10218 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
10220 ? (big_endian
? "elf64ppc" : "elf64lppc")
10221 : (big_endian
? "elf32ppc" : "elf32lppc")))
10225 do_instantiate_target()
10226 { return new Target_powerpc
<size
, big_endian
>(); }
10229 Target_selector_powerpc
<32, true> target_selector_ppc32
;
10230 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
10231 Target_selector_powerpc
<64, true> target_selector_ppc64
;
10232 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
10234 // Instantiate these constants for -O0
10235 template<int size
, bool big_endian
>
10236 const typename Output_data_glink
<size
, big_endian
>::Address
10237 Output_data_glink
<size
, big_endian
>::invalid_address
;
10238 template<int size
, bool big_endian
>
10239 const typename Stub_table
<size
, big_endian
>::Address
10240 Stub_table
<size
, big_endian
>::invalid_address
;
10241 template<int size
, bool big_endian
>
10242 const typename Target_powerpc
<size
, big_endian
>::Address
10243 Target_powerpc
<size
, big_endian
>::invalid_address
;
10245 } // End anonymous namespace.