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
);
4168 // Stub_table holds information about plt and long branch stubs.
4169 // Stubs are built in an area following some input section determined
4170 // by group_sections(). This input section is converted to a relaxed
4171 // input section allowing it to be resized to accommodate the stubs
4173 template<int size
, bool big_endian
>
4174 class Stub_table
: public Output_relaxed_input_section
4179 Plt_stub_ent(unsigned int off
, unsigned int indx
)
4180 : off_(off
), indx_(indx
), r2save_(0), localentry0_(0)
4184 unsigned int indx_
: 30;
4185 unsigned int r2save_
: 1;
4186 unsigned int localentry0_
: 1;
4188 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4189 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4191 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
4192 Output_section
* output_section
,
4193 const Output_section::Input_section
* owner
,
4195 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
4197 ->section_addralign(owner
->shndx())),
4198 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
4199 orig_data_size_(owner
->current_data_size()),
4200 plt_size_(0), last_plt_size_(0),
4201 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4202 need_save_res_(false), uniq_(id
), tls_get_addr_opt_bctrl_(-1u),
4205 this->set_output_section(output_section
);
4207 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
4208 new_relaxed
.push_back(this);
4209 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
4212 // Add a plt call stub.
4214 add_plt_call_entry(Address
,
4215 const Sized_relobj_file
<size
, big_endian
>*,
4222 add_plt_call_entry(Address
,
4223 const Sized_relobj_file
<size
, big_endian
>*,
4229 // Find a given plt call stub.
4231 find_plt_call_entry(const Symbol
*) const;
4234 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4235 unsigned int) const;
4238 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4244 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
4249 // Add a long branch stub.
4251 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4252 unsigned int, Address
, Address
, bool);
4255 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
4259 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
4261 Address max_branch_offset
= max_branch_delta(r_type
);
4262 if (max_branch_offset
== 0)
4264 gold_assert(from
!= invalid_address
);
4265 Address loc
= off
+ this->stub_address();
4266 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
4270 clear_stubs(bool all
)
4272 this->plt_call_stubs_
.clear();
4273 this->plt_size_
= 0;
4274 this->long_branch_stubs_
.clear();
4275 this->branch_size_
= 0;
4276 this->need_save_res_
= false;
4279 this->last_plt_size_
= 0;
4280 this->last_branch_size_
= 0;
4285 set_address_and_size(const Output_section
* os
, Address off
)
4287 Address start_off
= off
;
4288 off
+= this->orig_data_size_
;
4289 Address my_size
= this->plt_size_
+ this->branch_size_
;
4290 if (this->need_save_res_
)
4291 my_size
+= this->targ_
->savres_section()->data_size();
4293 off
= align_address(off
, this->stub_align());
4294 // Include original section size and alignment padding in size
4295 my_size
+= off
- start_off
;
4296 // Ensure new size is always larger than min size
4297 // threshold. Alignment requirement is included in "my_size", so
4298 // increase "my_size" does not invalidate alignment.
4299 if (my_size
< this->min_size_threshold_
)
4300 my_size
= this->min_size_threshold_
;
4301 this->reset_address_and_file_offset();
4302 this->set_current_data_size(my_size
);
4303 this->set_address_and_file_offset(os
->address() + start_off
,
4304 os
->offset() + start_off
);
4309 stub_address() const
4311 return align_address(this->address() + this->orig_data_size_
,
4312 this->stub_align());
4318 return align_address(this->offset() + this->orig_data_size_
,
4319 this->stub_align());
4324 { return this->plt_size_
; }
4327 set_min_size_threshold(Address min_size
)
4328 { this->min_size_threshold_
= min_size
; }
4331 define_stub_syms(Symbol_table
*);
4336 Output_section
* os
= this->output_section();
4337 if (os
->addralign() < this->stub_align())
4339 os
->set_addralign(this->stub_align());
4340 // FIXME: get rid of the insane checkpointing.
4341 // We can't increase alignment of the input section to which
4342 // stubs are attached; The input section may be .init which
4343 // is pasted together with other .init sections to form a
4344 // function. Aligning might insert zero padding resulting in
4345 // sigill. However we do need to increase alignment of the
4346 // output section so that the align_address() on offset in
4347 // set_address_and_size() adds the same padding as the
4348 // align_address() on address in stub_address().
4349 // What's more, we need this alignment for the layout done in
4350 // relaxation_loop_body() so that the output section starts at
4351 // a suitably aligned address.
4352 os
->checkpoint_set_addralign(this->stub_align());
4354 if (this->last_plt_size_
!= this->plt_size_
4355 || this->last_branch_size_
!= this->branch_size_
)
4357 this->last_plt_size_
= this->plt_size_
;
4358 this->last_branch_size_
= this->branch_size_
;
4364 // Generate a suitable FDE to describe code in this stub group.
4368 // Add .eh_frame info for this stub section.
4370 add_eh_frame(Layout
* layout
);
4372 // Remove .eh_frame info for this stub section.
4374 remove_eh_frame(Layout
* layout
);
4376 Target_powerpc
<size
, big_endian
>*
4382 class Plt_stub_key_hash
;
4383 typedef Unordered_map
<Plt_stub_key
, Plt_stub_ent
,
4384 Plt_stub_key_hash
> Plt_stub_entries
;
4385 class Branch_stub_ent
;
4386 class Branch_stub_ent_hash
;
4387 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
4388 Branch_stub_ent_hash
> Branch_stub_entries
;
4390 // Alignment of stub section.
4394 unsigned int min_align
= 4;
4395 if (!parameters
->options().user_set_plt_align())
4396 return size
== 64 ? 32 : min_align
;
4397 unsigned int user_align
= 1 << parameters
->options().plt_align();
4398 return std::max(user_align
, min_align
);
4401 // Return the plt offset for the given call stub.
4403 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
4405 const Symbol
* gsym
= p
->first
.sym_
;
4408 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
4409 && gsym
->can_use_relative_reloc(false));
4410 return gsym
->plt_offset();
4415 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
4416 unsigned int local_sym_index
= p
->first
.locsym_
;
4417 return relobj
->local_plt_offset(local_sym_index
);
4421 // Size of a given plt call stub.
4423 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
4427 const Symbol
* gsym
= p
->first
.sym_
;
4429 + (this->targ_
->is_tls_get_addr_opt(gsym
) ? 8 * 4 : 0));
4433 Address plt_addr
= this->plt_off(p
, &is_iplt
);
4435 plt_addr
+= this->targ_
->iplt_section()->address();
4437 plt_addr
+= this->targ_
->plt_section()->address();
4438 Address got_addr
= this->targ_
->got_section()->output_section()->address();
4439 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4440 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
4441 got_addr
+= ppcobj
->toc_base_offset();
4442 Address off
= plt_addr
- got_addr
;
4443 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
4444 const Symbol
* gsym
= p
->first
.sym_
;
4445 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4447 if (this->targ_
->abiversion() < 2)
4449 bool static_chain
= parameters
->options().plt_static_chain();
4450 bool thread_safe
= this->targ_
->plt_thread_safe();
4454 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
4460 plt_call_align(unsigned int bytes
) const
4462 unsigned int align
= this->stub_align();
4463 return (bytes
+ align
- 1) & -align
;
4466 // Return long branch stub size.
4468 branch_stub_size(typename
Branch_stub_entries::const_iterator p
)
4470 Address loc
= this->stub_address() + this->last_plt_size_
+ p
->second
;
4471 if (p
->first
.dest_
- loc
+ (1 << 25) < 2 << 25)
4473 unsigned int bytes
= 16;
4474 if (size
== 32 && parameters
->options().output_is_position_independent())
4481 do_write(Output_file
*);
4483 // Plt call stub keys.
4487 Plt_stub_key(const Symbol
* sym
)
4488 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4491 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4492 unsigned int locsym_index
)
4493 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4496 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4498 unsigned int r_type
,
4500 : sym_(sym
), object_(0), addend_(0), locsym_(0)
4503 this->addend_
= addend
;
4504 else if (parameters
->options().output_is_position_independent()
4505 && r_type
== elfcpp::R_PPC_PLTREL24
)
4507 this->addend_
= addend
;
4508 if (this->addend_
>= 32768)
4509 this->object_
= object
;
4513 Plt_stub_key(const Sized_relobj_file
<size
, big_endian
>* object
,
4514 unsigned int locsym_index
,
4515 unsigned int r_type
,
4517 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
4520 this->addend_
= addend
;
4521 else if (parameters
->options().output_is_position_independent()
4522 && r_type
== elfcpp::R_PPC_PLTREL24
)
4523 this->addend_
= addend
;
4526 bool operator==(const Plt_stub_key
& that
) const
4528 return (this->sym_
== that
.sym_
4529 && this->object_
== that
.object_
4530 && this->addend_
== that
.addend_
4531 && this->locsym_
== that
.locsym_
);
4535 const Sized_relobj_file
<size
, big_endian
>* object_
;
4536 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
4537 unsigned int locsym_
;
4540 class Plt_stub_key_hash
4543 size_t operator()(const Plt_stub_key
& ent
) const
4545 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
4546 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
4552 // Long branch stub keys.
4553 class Branch_stub_ent
4556 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
,
4557 Address to
, bool save_res
)
4558 : dest_(to
), toc_base_off_(0), save_res_(save_res
)
4561 toc_base_off_
= obj
->toc_base_offset();
4564 bool operator==(const Branch_stub_ent
& that
) const
4566 return (this->dest_
== that
.dest_
4568 || this->toc_base_off_
== that
.toc_base_off_
));
4572 unsigned int toc_base_off_
;
4576 class Branch_stub_ent_hash
4579 size_t operator()(const Branch_stub_ent
& ent
) const
4580 { return ent
.dest_
^ ent
.toc_base_off_
; }
4583 // In a sane world this would be a global.
4584 Target_powerpc
<size
, big_endian
>* targ_
;
4585 // Map sym/object/addend to stub offset.
4586 Plt_stub_entries plt_call_stubs_
;
4587 // Map destination address to stub offset.
4588 Branch_stub_entries long_branch_stubs_
;
4589 // size of input section
4590 section_size_type orig_data_size_
;
4592 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
4593 // Some rare cases cause (PR/20529) fluctuation in stub table
4594 // size, which leads to an endless relax loop. This is to be fixed
4595 // by, after the first few iterations, allowing only increase of
4596 // stub table size. This variable sets the minimal possible size of
4597 // a stub table, it is zero for the first few iterations, then
4598 // increases monotonically.
4599 Address min_size_threshold_
;
4600 // Set if this stub group needs a copy of out-of-line register
4601 // save/restore functions.
4602 bool need_save_res_
;
4603 // Per stub table unique identifier.
4605 // The bctrl in the __tls_get_addr_opt stub, if present.
4606 unsigned int tls_get_addr_opt_bctrl_
;
4607 // FDE unwind info for this stub group.
4608 unsigned int plt_fde_len_
;
4609 unsigned char plt_fde_
[20];
4612 // Add a plt call stub, if we do not already have one for this
4613 // sym/object/addend combo.
4615 template<int size
, bool big_endian
>
4617 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4619 const Sized_relobj_file
<size
, big_endian
>* object
,
4621 unsigned int r_type
,
4625 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4626 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4627 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4628 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4631 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4633 && this->targ_
->is_elfv2_localentry0(gsym
))
4635 p
.first
->second
.localentry0_
= 1;
4636 this->targ_
->set_has_localentry0();
4638 if (this->targ_
->is_tls_get_addr_opt(gsym
))
4640 this->targ_
->set_has_tls_get_addr_opt();
4641 this->tls_get_addr_opt_bctrl_
= this->plt_size_
- 5 * 4;
4643 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4647 && !p
.first
->second
.localentry0_
)
4648 p
.first
->second
.r2save_
= 1;
4649 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4652 template<int size
, bool big_endian
>
4654 Stub_table
<size
, big_endian
>::add_plt_call_entry(
4656 const Sized_relobj_file
<size
, big_endian
>* object
,
4657 unsigned int locsym_index
,
4658 unsigned int r_type
,
4662 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4663 Plt_stub_ent
ent(this->plt_size_
, this->plt_call_stubs_
.size());
4664 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
4665 = this->plt_call_stubs_
.insert(std::make_pair(key
, ent
));
4668 this->plt_size_
= ent
.off_
+ this->plt_call_size(p
.first
);
4669 this->plt_size_
= this->plt_call_align(this->plt_size_
);
4671 && this->targ_
->is_elfv2_localentry0(object
, locsym_index
))
4673 p
.first
->second
.localentry0_
= 1;
4674 this->targ_
->set_has_localentry0();
4679 && !p
.first
->second
.localentry0_
)
4680 p
.first
->second
.r2save_
= 1;
4681 return this->can_reach_stub(from
, ent
.off_
, r_type
);
4684 // Find a plt call stub.
4686 template<int size
, bool big_endian
>
4687 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4688 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4689 const Sized_relobj_file
<size
, big_endian
>* object
,
4691 unsigned int r_type
,
4692 Address addend
) const
4694 Plt_stub_key
key(object
, gsym
, r_type
, addend
);
4695 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4696 if (p
== this->plt_call_stubs_
.end())
4701 template<int size
, bool big_endian
>
4702 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4703 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4705 Plt_stub_key
key(gsym
);
4706 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4707 if (p
== this->plt_call_stubs_
.end())
4712 template<int size
, bool big_endian
>
4713 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4714 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4715 const Sized_relobj_file
<size
, big_endian
>* object
,
4716 unsigned int locsym_index
,
4717 unsigned int r_type
,
4718 Address addend
) const
4720 Plt_stub_key
key(object
, locsym_index
, r_type
, addend
);
4721 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4722 if (p
== this->plt_call_stubs_
.end())
4727 template<int size
, bool big_endian
>
4728 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
*
4729 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4730 const Sized_relobj_file
<size
, big_endian
>* object
,
4731 unsigned int locsym_index
) const
4733 Plt_stub_key
key(object
, locsym_index
);
4734 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(key
);
4735 if (p
== this->plt_call_stubs_
.end())
4740 // Add a long branch stub if we don't already have one to given
4743 template<int size
, bool big_endian
>
4745 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4746 const Powerpc_relobj
<size
, big_endian
>* object
,
4747 unsigned int r_type
,
4752 Branch_stub_ent
ent(object
, to
, save_res
);
4753 Address off
= this->branch_size_
;
4754 std::pair
<typename
Branch_stub_entries::iterator
, bool> p
4755 = this->long_branch_stubs_
.insert(std::make_pair(ent
, off
));
4759 this->need_save_res_
= true;
4762 unsigned int stub_size
= this->branch_stub_size(p
.first
);
4763 this->branch_size_
= off
+ stub_size
;
4764 if (size
== 64 && stub_size
!= 4)
4765 this->targ_
->add_branch_lookup_table(to
);
4768 return this->can_reach_stub(from
, off
, r_type
);
4771 // Find long branch stub offset.
4773 template<int size
, bool big_endian
>
4774 typename Stub_table
<size
, big_endian
>::Address
4775 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4776 const Powerpc_relobj
<size
, big_endian
>* object
,
4779 Branch_stub_ent
ent(object
, to
, false);
4780 typename
Branch_stub_entries::const_iterator p
4781 = this->long_branch_stubs_
.find(ent
);
4782 if (p
== this->long_branch_stubs_
.end())
4783 return invalid_address
;
4784 if (p
->first
.save_res_
)
4785 return to
- this->targ_
->savres_section()->address() + this->branch_size_
;
4789 // Generate a suitable FDE to describe code in this stub group.
4790 // The __tls_get_addr_opt call stub needs to describe where it saves
4791 // LR, to support exceptions that might be thrown from __tls_get_addr.
4793 template<int size
, bool big_endian
>
4795 Stub_table
<size
, big_endian
>::init_plt_fde()
4797 unsigned char* p
= this->plt_fde_
;
4798 // offset pcrel sdata4, size udata4, and augmentation size byte.
4801 if (this->tls_get_addr_opt_bctrl_
!= -1u)
4803 unsigned int to_bctrl
= this->tls_get_addr_opt_bctrl_
/ 4;
4805 *p
++ = elfcpp::DW_CFA_advance_loc
+ to_bctrl
;
4806 else if (to_bctrl
< 256)
4808 *p
++ = elfcpp::DW_CFA_advance_loc1
;
4811 else if (to_bctrl
< 65536)
4813 *p
++ = elfcpp::DW_CFA_advance_loc2
;
4814 elfcpp::Swap
<16, big_endian
>::writeval(p
, to_bctrl
);
4819 *p
++ = elfcpp::DW_CFA_advance_loc4
;
4820 elfcpp::Swap
<32, big_endian
>::writeval(p
, to_bctrl
);
4823 *p
++ = elfcpp::DW_CFA_offset_extended_sf
;
4825 *p
++ = -(this->targ_
->stk_linker() / 8) & 0x7f;
4826 *p
++ = elfcpp::DW_CFA_advance_loc
+ 4;
4827 *p
++ = elfcpp::DW_CFA_restore_extended
;
4830 this->plt_fde_len_
= p
- this->plt_fde_
;
4833 // Add .eh_frame info for this stub section. Unlike other linker
4834 // generated .eh_frame this is added late in the link, because we
4835 // only want the .eh_frame info if this particular stub section is
4838 template<int size
, bool big_endian
>
4840 Stub_table
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4842 if (!parameters
->options().ld_generated_unwind_info())
4845 // Since we add stub .eh_frame info late, it must be placed
4846 // after all other linker generated .eh_frame info so that
4847 // merge mapping need not be updated for input sections.
4848 // There is no provision to use a different CIE to that used
4850 if (!this->targ_
->has_glink())
4853 if (this->plt_size_
+ this->branch_size_
+ this->need_save_res_
== 0)
4856 this->init_plt_fde();
4857 layout
->add_eh_frame_for_plt(this,
4858 Eh_cie
<size
>::eh_frame_cie
,
4859 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4860 this->plt_fde_
, this->plt_fde_len_
);
4863 template<int size
, bool big_endian
>
4865 Stub_table
<size
, big_endian
>::remove_eh_frame(Layout
* layout
)
4867 if (this->plt_fde_len_
!= 0)
4869 layout
->remove_eh_frame_for_plt(this,
4870 Eh_cie
<size
>::eh_frame_cie
,
4871 sizeof (Eh_cie
<size
>::eh_frame_cie
),
4872 this->plt_fde_
, this->plt_fde_len_
);
4873 this->plt_fde_len_
= 0;
4877 // A class to handle .glink.
4879 template<int size
, bool big_endian
>
4880 class Output_data_glink
: public Output_section_data
4883 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4884 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4886 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4887 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4888 end_branch_table_(), ge_size_(0)
4892 add_eh_frame(Layout
* layout
);
4895 add_global_entry(const Symbol
*);
4898 find_global_entry(const Symbol
*) const;
4901 global_entry_align(unsigned int off
) const
4903 unsigned int align
= 1 << parameters
->options().plt_align();
4904 if (!parameters
->options().user_set_plt_align())
4905 align
= size
== 64 ? 32 : 4;
4906 return (off
+ align
- 1) & -align
;
4910 global_entry_off() const
4912 return this->global_entry_align(this->end_branch_table_
);
4916 global_entry_address() const
4918 gold_assert(this->is_data_size_valid());
4919 return this->address() + this->global_entry_off();
4923 pltresolve_size() const
4927 + (this->targ_
->abiversion() < 2 ? 11 * 4 : 14 * 4));
4932 // Write to a map file.
4934 do_print_to_mapfile(Mapfile
* mapfile
) const
4935 { mapfile
->print_output_data(this, _("** glink")); }
4939 set_final_data_size();
4943 do_write(Output_file
*);
4945 // Allows access to .got and .plt for do_write.
4946 Target_powerpc
<size
, big_endian
>* targ_
;
4948 // Map sym to stub offset.
4949 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4950 Global_entry_stub_entries global_entry_stubs_
;
4952 unsigned int end_branch_table_
, ge_size_
;
4955 template<int size
, bool big_endian
>
4957 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4959 if (!parameters
->options().ld_generated_unwind_info())
4964 if (this->targ_
->abiversion() < 2)
4965 layout
->add_eh_frame_for_plt(this,
4966 Eh_cie
<64>::eh_frame_cie
,
4967 sizeof (Eh_cie
<64>::eh_frame_cie
),
4968 glink_eh_frame_fde_64v1
,
4969 sizeof (glink_eh_frame_fde_64v1
));
4971 layout
->add_eh_frame_for_plt(this,
4972 Eh_cie
<64>::eh_frame_cie
,
4973 sizeof (Eh_cie
<64>::eh_frame_cie
),
4974 glink_eh_frame_fde_64v2
,
4975 sizeof (glink_eh_frame_fde_64v2
));
4979 // 32-bit .glink can use the default since the CIE return
4980 // address reg, LR, is valid.
4981 layout
->add_eh_frame_for_plt(this,
4982 Eh_cie
<32>::eh_frame_cie
,
4983 sizeof (Eh_cie
<32>::eh_frame_cie
),
4985 sizeof (default_fde
));
4986 // Except where LR is used in a PIC __glink_PLTresolve.
4987 if (parameters
->options().output_is_position_independent())
4988 layout
->add_eh_frame_for_plt(this,
4989 Eh_cie
<32>::eh_frame_cie
,
4990 sizeof (Eh_cie
<32>::eh_frame_cie
),
4991 glink_eh_frame_fde_32
,
4992 sizeof (glink_eh_frame_fde_32
));
4996 template<int size
, bool big_endian
>
4998 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
5000 unsigned int off
= this->global_entry_align(this->ge_size_
);
5001 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
5002 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, off
));
5004 this->ge_size_
= off
+ 16;
5007 template<int size
, bool big_endian
>
5008 typename Output_data_glink
<size
, big_endian
>::Address
5009 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
5011 typename
Global_entry_stub_entries::const_iterator p
5012 = this->global_entry_stubs_
.find(gsym
);
5013 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
5016 template<int size
, bool big_endian
>
5018 Output_data_glink
<size
, big_endian
>::set_final_data_size()
5020 unsigned int count
= this->targ_
->plt_entry_count();
5021 section_size_type total
= 0;
5027 // space for branch table
5028 total
+= 4 * (count
- 1);
5030 total
+= -total
& 15;
5031 total
+= this->pltresolve_size();
5035 total
+= this->pltresolve_size();
5037 // space for branch table
5039 if (this->targ_
->abiversion() < 2)
5043 total
+= 4 * (count
- 0x8000);
5047 this->end_branch_table_
= total
;
5048 total
= this->global_entry_align(total
);
5049 total
+= this->ge_size_
;
5051 this->set_data_size(total
);
5054 // Define symbols on stubs, identifying the stub.
5056 template<int size
, bool big_endian
>
5058 Stub_table
<size
, big_endian
>::define_stub_syms(Symbol_table
* symtab
)
5060 if (!this->plt_call_stubs_
.empty())
5062 // The key for the plt call stub hash table includes addresses,
5063 // therefore traversal order depends on those addresses, which
5064 // can change between runs if gold is a PIE. Unfortunately the
5065 // output .symtab ordering depends on the order in which symbols
5066 // are added to the linker symtab. We want reproducible output
5067 // so must sort the call stub symbols.
5068 typedef typename
Plt_stub_entries::const_iterator plt_iter
;
5069 std::vector
<plt_iter
> sorted
;
5070 sorted
.resize(this->plt_call_stubs_
.size());
5072 for (plt_iter cs
= this->plt_call_stubs_
.begin();
5073 cs
!= this->plt_call_stubs_
.end();
5075 sorted
[cs
->second
.indx_
] = cs
;
5077 for (unsigned int i
= 0; i
< this->plt_call_stubs_
.size(); ++i
)
5079 plt_iter cs
= sorted
[i
];
5082 if (cs
->first
.addend_
!= 0)
5083 sprintf(add
, "+%x", static_cast<uint32_t>(cs
->first
.addend_
));
5086 if (cs
->first
.object_
)
5088 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5089 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5090 sprintf(obj
, "%x:", ppcobj
->uniq());
5093 const char *symname
;
5094 if (cs
->first
.sym_
== NULL
)
5096 sprintf(localname
, "%x", cs
->first
.locsym_
);
5097 symname
= localname
;
5099 else if (this->targ_
->is_tls_get_addr_opt(cs
->first
.sym_
))
5100 symname
= this->targ_
->tls_get_addr_opt()->name();
5102 symname
= cs
->first
.sym_
->name();
5103 char* name
= new char[8 + 10 + strlen(obj
) + strlen(symname
) + strlen(add
) + 1];
5104 sprintf(name
, "%08x.plt_call.%s%s%s", this->uniq_
, obj
, symname
, add
);
5106 = this->stub_address() - this->address() + cs
->second
.off_
;
5107 unsigned int stub_size
= this->plt_call_align(this->plt_call_size(cs
));
5108 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5112 typedef typename
Branch_stub_entries::const_iterator branch_iter
;
5113 for (branch_iter bs
= this->long_branch_stubs_
.begin();
5114 bs
!= this->long_branch_stubs_
.end();
5117 if (bs
->first
.save_res_
)
5120 char* name
= new char[8 + 13 + 16 + 1];
5121 sprintf(name
, "%08x.long_branch.%llx", this->uniq_
,
5122 static_cast<unsigned long long>(bs
->first
.dest_
));
5123 Address value
= (this->stub_address() - this->address()
5124 + this->plt_size_
+ bs
->second
);
5125 unsigned int stub_size
= this->branch_stub_size(bs
);
5126 this->targ_
->define_local(symtab
, name
, this, value
, stub_size
);
5130 // Write out plt and long branch stub code.
5132 template<int size
, bool big_endian
>
5134 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
5136 if (this->plt_call_stubs_
.empty()
5137 && this->long_branch_stubs_
.empty())
5140 const section_size_type start_off
= this->offset();
5141 const section_size_type off
= this->stub_offset();
5142 const section_size_type oview_size
=
5143 convert_to_section_size_type(this->data_size() - (off
- start_off
));
5144 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5149 const Output_data_got_powerpc
<size
, big_endian
>* got
5150 = this->targ_
->got_section();
5151 Address got_os_addr
= got
->output_section()->address();
5153 if (!this->plt_call_stubs_
.empty())
5155 // The base address of the .plt section.
5156 Address plt_base
= this->targ_
->plt_section()->address();
5157 Address iplt_base
= invalid_address
;
5159 // Write out plt call stubs.
5160 typename
Plt_stub_entries::const_iterator cs
;
5161 for (cs
= this->plt_call_stubs_
.begin();
5162 cs
!= this->plt_call_stubs_
.end();
5166 Address pltoff
= this->plt_off(cs
, &is_iplt
);
5167 Address plt_addr
= pltoff
;
5170 if (iplt_base
== invalid_address
)
5171 iplt_base
= this->targ_
->iplt_section()->address();
5172 plt_addr
+= iplt_base
;
5175 plt_addr
+= plt_base
;
5176 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
5177 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
5178 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
5179 Address off
= plt_addr
- got_addr
;
5181 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
5182 gold_error(_("%s: linkage table error against `%s'"),
5183 cs
->first
.object_
->name().c_str(),
5184 cs
->first
.sym_
->demangled_name().c_str());
5186 bool plt_load_toc
= this->targ_
->abiversion() < 2;
5188 = plt_load_toc
&& parameters
->options().plt_static_chain();
5190 = plt_load_toc
&& this->targ_
->plt_thread_safe();
5191 bool use_fake_dep
= false;
5192 Address cmp_branch_off
= 0;
5195 unsigned int pltindex
5196 = ((pltoff
- this->targ_
->first_plt_entry_offset())
5197 / this->targ_
->plt_entry_size());
5199 = (this->targ_
->glink_section()->pltresolve_size()
5201 if (pltindex
> 32768)
5202 glinkoff
+= (pltindex
- 32768) * 4;
5204 = this->targ_
->glink_section()->address() + glinkoff
;
5206 = (this->stub_address() + cs
->second
.off_
+ 20
5207 + 4 * cs
->second
.r2save_
5208 + 4 * (ha(off
) != 0)
5209 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5210 + 4 * static_chain
);
5211 cmp_branch_off
= to
- from
;
5212 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
5215 p
= oview
+ cs
->second
.off_
;
5216 const Symbol
* gsym
= cs
->first
.sym_
;
5217 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5219 write_insn
<big_endian
>(p
, ld_11_3
+ 0);
5221 write_insn
<big_endian
>(p
, ld_12_3
+ 8);
5223 write_insn
<big_endian
>(p
, mr_0_3
);
5225 write_insn
<big_endian
>(p
, cmpdi_11_0
);
5227 write_insn
<big_endian
>(p
, add_3_12_13
);
5229 write_insn
<big_endian
>(p
, beqlr
);
5231 write_insn
<big_endian
>(p
, mr_3_0
);
5233 if (!cs
->second
.localentry0_
)
5235 write_insn
<big_endian
>(p
, mflr_11
);
5237 write_insn
<big_endian
>(p
, (std_11_1
5238 + this->targ_
->stk_linker()));
5241 use_fake_dep
= thread_safe
;
5245 if (cs
->second
.r2save_
)
5247 write_insn
<big_endian
>(p
,
5248 std_2_1
+ this->targ_
->stk_toc());
5253 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
5255 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
5260 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
5262 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
5266 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5268 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
5272 write_insn
<big_endian
>(p
, mtctr_12
);
5278 write_insn
<big_endian
>(p
, xor_2_12_12
);
5280 write_insn
<big_endian
>(p
, add_11_11_2
);
5283 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
5287 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
5294 if (cs
->second
.r2save_
)
5296 write_insn
<big_endian
>(p
,
5297 std_2_1
+ this->targ_
->stk_toc());
5300 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
5303 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
5305 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
5309 write_insn
<big_endian
>(p
, mtctr_12
);
5315 write_insn
<big_endian
>(p
, xor_11_12_12
);
5317 write_insn
<big_endian
>(p
, add_2_2_11
);
5322 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
5325 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
5329 if (!cs
->second
.localentry0_
5330 && this->targ_
->is_tls_get_addr_opt(gsym
))
5332 write_insn
<big_endian
>(p
, bctrl
);
5334 write_insn
<big_endian
>(p
, ld_2_1
+ this->targ_
->stk_toc());
5336 write_insn
<big_endian
>(p
, ld_11_1
+ this->targ_
->stk_linker());
5338 write_insn
<big_endian
>(p
, mtlr_11
);
5340 write_insn
<big_endian
>(p
, blr
);
5342 else if (thread_safe
&& !use_fake_dep
)
5344 write_insn
<big_endian
>(p
, cmpldi_2_0
);
5346 write_insn
<big_endian
>(p
, bnectr_p4
);
5348 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
5351 write_insn
<big_endian
>(p
, bctr
);
5355 // Write out long branch stubs.
5356 typename
Branch_stub_entries::const_iterator bs
;
5357 for (bs
= this->long_branch_stubs_
.begin();
5358 bs
!= this->long_branch_stubs_
.end();
5361 if (bs
->first
.save_res_
)
5363 p
= oview
+ this->plt_size_
+ bs
->second
;
5364 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5365 Address delta
= bs
->first
.dest_
- loc
;
5366 if (delta
+ (1 << 25) < 2 << 25)
5367 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5371 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
5372 gold_assert(brlt_addr
!= invalid_address
);
5373 brlt_addr
+= this->targ_
->brlt_section()->address();
5374 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
5375 Address brltoff
= brlt_addr
- got_addr
;
5376 if (ha(brltoff
) == 0)
5378 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
5382 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
5383 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
5385 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5386 write_insn
<big_endian
>(p
, bctr
);
5392 if (!this->plt_call_stubs_
.empty())
5394 // The base address of the .plt section.
5395 Address plt_base
= this->targ_
->plt_section()->address();
5396 Address iplt_base
= invalid_address
;
5397 // The address of _GLOBAL_OFFSET_TABLE_.
5398 Address g_o_t
= invalid_address
;
5400 // Write out plt call stubs.
5401 typename
Plt_stub_entries::const_iterator cs
;
5402 for (cs
= this->plt_call_stubs_
.begin();
5403 cs
!= this->plt_call_stubs_
.end();
5407 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
5410 if (iplt_base
== invalid_address
)
5411 iplt_base
= this->targ_
->iplt_section()->address();
5412 plt_addr
+= iplt_base
;
5415 plt_addr
+= plt_base
;
5417 p
= oview
+ cs
->second
.off_
;
5418 const Symbol
* gsym
= cs
->first
.sym_
;
5419 if (this->targ_
->is_tls_get_addr_opt(gsym
))
5421 write_insn
<big_endian
>(p
, lwz_11_3
+ 0);
5423 write_insn
<big_endian
>(p
, lwz_12_3
+ 4);
5425 write_insn
<big_endian
>(p
, mr_0_3
);
5427 write_insn
<big_endian
>(p
, cmpwi_11_0
);
5429 write_insn
<big_endian
>(p
, add_3_12_2
);
5431 write_insn
<big_endian
>(p
, beqlr
);
5433 write_insn
<big_endian
>(p
, mr_3_0
);
5435 write_insn
<big_endian
>(p
, nop
);
5438 if (parameters
->options().output_is_position_independent())
5441 const Powerpc_relobj
<size
, big_endian
>* ppcobj
5442 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
5443 (cs
->first
.object_
));
5444 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
5446 unsigned int got2
= ppcobj
->got2_shndx();
5447 got_addr
= ppcobj
->get_output_section_offset(got2
);
5448 gold_assert(got_addr
!= invalid_address
);
5449 got_addr
+= (ppcobj
->output_section(got2
)->address()
5450 + cs
->first
.addend_
);
5454 if (g_o_t
== invalid_address
)
5456 const Output_data_got_powerpc
<size
, big_endian
>* got
5457 = this->targ_
->got_section();
5458 g_o_t
= got
->address() + got
->g_o_t();
5463 Address off
= plt_addr
- got_addr
;
5465 write_insn
<big_endian
>(p
, lwz_11_30
+ l(off
));
5468 write_insn
<big_endian
>(p
, addis_11_30
+ ha(off
));
5470 write_insn
<big_endian
>(p
, lwz_11_11
+ l(off
));
5475 write_insn
<big_endian
>(p
, lis_11
+ ha(plt_addr
));
5477 write_insn
<big_endian
>(p
, lwz_11_11
+ l(plt_addr
));
5480 write_insn
<big_endian
>(p
, mtctr_11
);
5482 write_insn
<big_endian
>(p
, bctr
);
5486 // Write out long branch stubs.
5487 typename
Branch_stub_entries::const_iterator bs
;
5488 for (bs
= this->long_branch_stubs_
.begin();
5489 bs
!= this->long_branch_stubs_
.end();
5492 if (bs
->first
.save_res_
)
5494 p
= oview
+ this->plt_size_
+ bs
->second
;
5495 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
5496 Address delta
= bs
->first
.dest_
- loc
;
5497 if (delta
+ (1 << 25) < 2 << 25)
5498 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
5499 else if (!parameters
->options().output_is_position_independent())
5501 write_insn
<big_endian
>(p
, lis_12
+ ha(bs
->first
.dest_
));
5503 write_insn
<big_endian
>(p
, addi_12_12
+ l(bs
->first
.dest_
));
5508 write_insn
<big_endian
>(p
, mflr_0
);
5510 write_insn
<big_endian
>(p
, bcl_20_31
);
5512 write_insn
<big_endian
>(p
, mflr_12
);
5514 write_insn
<big_endian
>(p
, addis_12_12
+ ha(delta
));
5516 write_insn
<big_endian
>(p
, addi_12_12
+ l(delta
));
5518 write_insn
<big_endian
>(p
, mtlr_0
);
5521 write_insn
<big_endian
>(p
, mtctr_12
);
5523 write_insn
<big_endian
>(p
, bctr
);
5526 if (this->need_save_res_
)
5528 p
= oview
+ this->plt_size_
+ this->branch_size_
;
5529 memcpy (p
, this->targ_
->savres_section()->contents(),
5530 this->targ_
->savres_section()->data_size());
5534 // Write out .glink.
5536 template<int size
, bool big_endian
>
5538 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
5540 const section_size_type off
= this->offset();
5541 const section_size_type oview_size
=
5542 convert_to_section_size_type(this->data_size());
5543 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5546 // The base address of the .plt section.
5547 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
5548 Address plt_base
= this->targ_
->plt_section()->address();
5552 if (this->end_branch_table_
!= 0)
5554 // Write pltresolve stub.
5556 Address after_bcl
= this->address() + 16;
5557 Address pltoff
= plt_base
- after_bcl
;
5559 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
5561 if (this->targ_
->abiversion() < 2)
5563 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
5564 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5565 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5566 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5567 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
5568 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5569 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5570 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
5571 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5572 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
5576 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
5577 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
5578 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
5579 write_insn
<big_endian
>(p
, std_2_1
+ 24), p
+= 4;
5580 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
5581 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
5582 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
5583 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
5584 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
5585 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
5586 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
5587 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5588 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
5590 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
5591 gold_assert(p
== oview
+ this->pltresolve_size());
5593 // Write lazy link call stubs.
5595 while (p
< oview
+ this->end_branch_table_
)
5597 if (this->targ_
->abiversion() < 2)
5601 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
5605 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
5606 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
5609 uint32_t branch_off
= 8 - (p
- oview
);
5610 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
5615 Address plt_base
= this->targ_
->plt_section()->address();
5616 Address iplt_base
= invalid_address
;
5617 unsigned int global_entry_off
= this->global_entry_off();
5618 Address global_entry_base
= this->address() + global_entry_off
;
5619 typename
Global_entry_stub_entries::const_iterator ge
;
5620 for (ge
= this->global_entry_stubs_
.begin();
5621 ge
!= this->global_entry_stubs_
.end();
5624 p
= oview
+ global_entry_off
+ ge
->second
;
5625 Address plt_addr
= ge
->first
->plt_offset();
5626 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
5627 && ge
->first
->can_use_relative_reloc(false))
5629 if (iplt_base
== invalid_address
)
5630 iplt_base
= this->targ_
->iplt_section()->address();
5631 plt_addr
+= iplt_base
;
5634 plt_addr
+= plt_base
;
5635 Address my_addr
= global_entry_base
+ ge
->second
;
5636 Address off
= plt_addr
- my_addr
;
5638 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
5639 gold_error(_("%s: linkage table error against `%s'"),
5640 ge
->first
->object()->name().c_str(),
5641 ge
->first
->demangled_name().c_str());
5643 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
5644 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
5645 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
5646 write_insn
<big_endian
>(p
, bctr
);
5651 const Output_data_got_powerpc
<size
, big_endian
>* got
5652 = this->targ_
->got_section();
5653 // The address of _GLOBAL_OFFSET_TABLE_.
5654 Address g_o_t
= got
->address() + got
->g_o_t();
5656 // Write out pltresolve branch table.
5658 unsigned int the_end
= oview_size
- this->pltresolve_size();
5659 unsigned char* end_p
= oview
+ the_end
;
5660 while (p
< end_p
- 8 * 4)
5661 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
5663 write_insn
<big_endian
>(p
, nop
), p
+= 4;
5665 // Write out pltresolve call stub.
5666 end_p
= oview
+ oview_size
;
5667 if (parameters
->options().output_is_position_independent())
5669 Address res0_off
= 0;
5670 Address after_bcl_off
= the_end
+ 12;
5671 Address bcl_res0
= after_bcl_off
- res0_off
;
5673 write_insn
<big_endian
>(p
, addis_11_11
+ ha(bcl_res0
));
5675 write_insn
<big_endian
>(p
, mflr_0
);
5677 write_insn
<big_endian
>(p
, bcl_20_31
);
5679 write_insn
<big_endian
>(p
, addi_11_11
+ l(bcl_res0
));
5681 write_insn
<big_endian
>(p
, mflr_12
);
5683 write_insn
<big_endian
>(p
, mtlr_0
);
5685 write_insn
<big_endian
>(p
, sub_11_11_12
);
5688 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
5690 write_insn
<big_endian
>(p
, addis_12_12
+ ha(got_bcl
));
5692 if (ha(got_bcl
) == ha(got_bcl
+ 4))
5694 write_insn
<big_endian
>(p
, lwz_0_12
+ l(got_bcl
));
5696 write_insn
<big_endian
>(p
, lwz_12_12
+ l(got_bcl
+ 4));
5700 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(got_bcl
));
5702 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5705 write_insn
<big_endian
>(p
, mtctr_0
);
5707 write_insn
<big_endian
>(p
, add_0_11_11
);
5709 write_insn
<big_endian
>(p
, add_11_0_11
);
5713 Address res0
= this->address();
5715 write_insn
<big_endian
>(p
, lis_12
+ ha(g_o_t
+ 4));
5717 write_insn
<big_endian
>(p
, addis_11_11
+ ha(-res0
));
5719 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5720 write_insn
<big_endian
>(p
, lwz_0_12
+ l(g_o_t
+ 4));
5722 write_insn
<big_endian
>(p
, lwzu_0_12
+ l(g_o_t
+ 4));
5724 write_insn
<big_endian
>(p
, addi_11_11
+ l(-res0
));
5726 write_insn
<big_endian
>(p
, mtctr_0
);
5728 write_insn
<big_endian
>(p
, add_0_11_11
);
5730 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
5731 write_insn
<big_endian
>(p
, lwz_12_12
+ l(g_o_t
+ 8));
5733 write_insn
<big_endian
>(p
, lwz_12_12
+ 4);
5735 write_insn
<big_endian
>(p
, add_11_0_11
);
5738 write_insn
<big_endian
>(p
, bctr
);
5742 write_insn
<big_endian
>(p
, nop
);
5747 of
->write_output_view(off
, oview_size
, oview
);
5751 // A class to handle linker generated save/restore functions.
5753 template<int size
, bool big_endian
>
5754 class Output_data_save_res
: public Output_section_data_build
5757 Output_data_save_res(Symbol_table
* symtab
);
5759 const unsigned char*
5766 // Write to a map file.
5768 do_print_to_mapfile(Mapfile
* mapfile
) const
5769 { mapfile
->print_output_data(this, _("** save/restore")); }
5772 do_write(Output_file
*);
5775 // The maximum size of save/restore contents.
5776 static const unsigned int savres_max
= 218*4;
5779 savres_define(Symbol_table
* symtab
,
5781 unsigned int lo
, unsigned int hi
,
5782 unsigned char* write_ent(unsigned char*, int),
5783 unsigned char* write_tail(unsigned char*, int));
5785 unsigned char *contents_
;
5788 template<bool big_endian
>
5789 static unsigned char*
5790 savegpr0(unsigned char* p
, int r
)
5792 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5793 write_insn
<big_endian
>(p
, insn
);
5797 template<bool big_endian
>
5798 static unsigned char*
5799 savegpr0_tail(unsigned char* p
, int r
)
5801 p
= savegpr0
<big_endian
>(p
, r
);
5802 uint32_t insn
= std_0_1
+ 16;
5803 write_insn
<big_endian
>(p
, insn
);
5805 write_insn
<big_endian
>(p
, blr
);
5809 template<bool big_endian
>
5810 static unsigned char*
5811 restgpr0(unsigned char* p
, int r
)
5813 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5814 write_insn
<big_endian
>(p
, insn
);
5818 template<bool big_endian
>
5819 static unsigned char*
5820 restgpr0_tail(unsigned char* p
, int r
)
5822 uint32_t insn
= ld_0_1
+ 16;
5823 write_insn
<big_endian
>(p
, insn
);
5825 p
= restgpr0
<big_endian
>(p
, r
);
5826 write_insn
<big_endian
>(p
, mtlr_0
);
5830 p
= restgpr0
<big_endian
>(p
, 30);
5831 p
= restgpr0
<big_endian
>(p
, 31);
5833 write_insn
<big_endian
>(p
, blr
);
5837 template<bool big_endian
>
5838 static unsigned char*
5839 savegpr1(unsigned char* p
, int r
)
5841 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5842 write_insn
<big_endian
>(p
, insn
);
5846 template<bool big_endian
>
5847 static unsigned char*
5848 savegpr1_tail(unsigned char* p
, int r
)
5850 p
= savegpr1
<big_endian
>(p
, r
);
5851 write_insn
<big_endian
>(p
, blr
);
5855 template<bool big_endian
>
5856 static unsigned char*
5857 restgpr1(unsigned char* p
, int r
)
5859 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5860 write_insn
<big_endian
>(p
, insn
);
5864 template<bool big_endian
>
5865 static unsigned char*
5866 restgpr1_tail(unsigned char* p
, int r
)
5868 p
= restgpr1
<big_endian
>(p
, r
);
5869 write_insn
<big_endian
>(p
, blr
);
5873 template<bool big_endian
>
5874 static unsigned char*
5875 savefpr(unsigned char* p
, int r
)
5877 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5878 write_insn
<big_endian
>(p
, insn
);
5882 template<bool big_endian
>
5883 static unsigned char*
5884 savefpr0_tail(unsigned char* p
, int r
)
5886 p
= savefpr
<big_endian
>(p
, r
);
5887 write_insn
<big_endian
>(p
, std_0_1
+ 16);
5889 write_insn
<big_endian
>(p
, blr
);
5893 template<bool big_endian
>
5894 static unsigned char*
5895 restfpr(unsigned char* p
, int r
)
5897 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
5898 write_insn
<big_endian
>(p
, insn
);
5902 template<bool big_endian
>
5903 static unsigned char*
5904 restfpr0_tail(unsigned char* p
, int r
)
5906 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
5908 p
= restfpr
<big_endian
>(p
, r
);
5909 write_insn
<big_endian
>(p
, mtlr_0
);
5913 p
= restfpr
<big_endian
>(p
, 30);
5914 p
= restfpr
<big_endian
>(p
, 31);
5916 write_insn
<big_endian
>(p
, blr
);
5920 template<bool big_endian
>
5921 static unsigned char*
5922 savefpr1_tail(unsigned char* p
, int r
)
5924 p
= savefpr
<big_endian
>(p
, r
);
5925 write_insn
<big_endian
>(p
, blr
);
5929 template<bool big_endian
>
5930 static unsigned char*
5931 restfpr1_tail(unsigned char* p
, int r
)
5933 p
= restfpr
<big_endian
>(p
, r
);
5934 write_insn
<big_endian
>(p
, blr
);
5938 template<bool big_endian
>
5939 static unsigned char*
5940 savevr(unsigned char* p
, int r
)
5942 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5943 write_insn
<big_endian
>(p
, insn
);
5945 insn
= stvx_0_12_0
+ (r
<< 21);
5946 write_insn
<big_endian
>(p
, insn
);
5950 template<bool big_endian
>
5951 static unsigned char*
5952 savevr_tail(unsigned char* p
, int r
)
5954 p
= savevr
<big_endian
>(p
, r
);
5955 write_insn
<big_endian
>(p
, blr
);
5959 template<bool big_endian
>
5960 static unsigned char*
5961 restvr(unsigned char* p
, int r
)
5963 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
5964 write_insn
<big_endian
>(p
, insn
);
5966 insn
= lvx_0_12_0
+ (r
<< 21);
5967 write_insn
<big_endian
>(p
, insn
);
5971 template<bool big_endian
>
5972 static unsigned char*
5973 restvr_tail(unsigned char* p
, int r
)
5975 p
= restvr
<big_endian
>(p
, r
);
5976 write_insn
<big_endian
>(p
, blr
);
5981 template<int size
, bool big_endian
>
5982 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
5983 Symbol_table
* symtab
)
5984 : Output_section_data_build(4),
5987 this->savres_define(symtab
,
5988 "_savegpr0_", 14, 31,
5989 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
5990 this->savres_define(symtab
,
5991 "_restgpr0_", 14, 29,
5992 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5993 this->savres_define(symtab
,
5994 "_restgpr0_", 30, 31,
5995 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5996 this->savres_define(symtab
,
5997 "_savegpr1_", 14, 31,
5998 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5999 this->savres_define(symtab
,
6000 "_restgpr1_", 14, 31,
6001 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
6002 this->savres_define(symtab
,
6003 "_savefpr_", 14, 31,
6004 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
6005 this->savres_define(symtab
,
6006 "_restfpr_", 14, 29,
6007 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6008 this->savres_define(symtab
,
6009 "_restfpr_", 30, 31,
6010 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
6011 this->savres_define(symtab
,
6013 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
6014 this->savres_define(symtab
,
6016 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
6017 this->savres_define(symtab
,
6019 savevr
<big_endian
>, savevr_tail
<big_endian
>);
6020 this->savres_define(symtab
,
6022 restvr
<big_endian
>, restvr_tail
<big_endian
>);
6025 template<int size
, bool big_endian
>
6027 Output_data_save_res
<size
, big_endian
>::savres_define(
6028 Symbol_table
* symtab
,
6030 unsigned int lo
, unsigned int hi
,
6031 unsigned char* write_ent(unsigned char*, int),
6032 unsigned char* write_tail(unsigned char*, int))
6034 size_t len
= strlen(name
);
6035 bool writing
= false;
6038 memcpy(sym
, name
, len
);
6041 for (unsigned int i
= lo
; i
<= hi
; i
++)
6043 sym
[len
+ 0] = i
/ 10 + '0';
6044 sym
[len
+ 1] = i
% 10 + '0';
6045 Symbol
* gsym
= symtab
->lookup(sym
);
6046 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
6047 writing
= writing
|| refd
;
6050 if (this->contents_
== NULL
)
6051 this->contents_
= new unsigned char[this->savres_max
];
6053 section_size_type value
= this->current_data_size();
6054 unsigned char* p
= this->contents_
+ value
;
6056 p
= write_ent(p
, i
);
6058 p
= write_tail(p
, i
);
6059 section_size_type cur_size
= p
- this->contents_
;
6060 this->set_current_data_size(cur_size
);
6062 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
6063 this, value
, cur_size
- value
,
6064 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
6065 elfcpp::STV_HIDDEN
, 0, false, false);
6070 // Write out save/restore.
6072 template<int size
, bool big_endian
>
6074 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
6076 const section_size_type off
= this->offset();
6077 const section_size_type oview_size
=
6078 convert_to_section_size_type(this->data_size());
6079 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
6080 memcpy(oview
, this->contents_
, oview_size
);
6081 of
->write_output_view(off
, oview_size
, oview
);
6085 // Create the glink section.
6087 template<int size
, bool big_endian
>
6089 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
6091 if (this->glink_
== NULL
)
6093 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
6094 this->glink_
->add_eh_frame(layout
);
6095 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6096 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6097 this->glink_
, ORDER_TEXT
, false);
6101 // Create a PLT entry for a global symbol.
6103 template<int size
, bool big_endian
>
6105 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
6109 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
6110 && gsym
->can_use_relative_reloc(false))
6112 if (this->iplt_
== NULL
)
6113 this->make_iplt_section(symtab
, layout
);
6114 this->iplt_
->add_ifunc_entry(gsym
);
6118 if (this->plt_
== NULL
)
6119 this->make_plt_section(symtab
, layout
);
6120 this->plt_
->add_entry(gsym
);
6124 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
6126 template<int size
, bool big_endian
>
6128 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
6129 Symbol_table
* symtab
,
6131 Sized_relobj_file
<size
, big_endian
>* relobj
,
6134 if (this->iplt_
== NULL
)
6135 this->make_iplt_section(symtab
, layout
);
6136 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
6139 // Return the number of entries in the PLT.
6141 template<int size
, bool big_endian
>
6143 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
6145 if (this->plt_
== NULL
)
6147 return this->plt_
->entry_count();
6150 // Create a GOT entry for local dynamic __tls_get_addr calls.
6152 template<int size
, bool big_endian
>
6154 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
6155 Symbol_table
* symtab
,
6157 Sized_relobj_file
<size
, big_endian
>* object
)
6159 if (this->tlsld_got_offset_
== -1U)
6161 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
6162 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
6163 Output_data_got_powerpc
<size
, big_endian
>* got
6164 = this->got_section(symtab
, layout
);
6165 unsigned int got_offset
= got
->add_constant_pair(0, 0);
6166 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
6168 this->tlsld_got_offset_
= got_offset
;
6170 return this->tlsld_got_offset_
;
6173 // Get the Reference_flags for a particular relocation.
6175 template<int size
, bool big_endian
>
6177 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
6178 unsigned int r_type
,
6179 const Target_powerpc
* target
)
6185 case elfcpp::R_POWERPC_NONE
:
6186 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6187 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6188 case elfcpp::R_PPC64_TOC
:
6189 // No symbol reference.
6192 case elfcpp::R_PPC64_ADDR64
:
6193 case elfcpp::R_PPC64_UADDR64
:
6194 case elfcpp::R_POWERPC_ADDR32
:
6195 case elfcpp::R_POWERPC_UADDR32
:
6196 case elfcpp::R_POWERPC_ADDR16
:
6197 case elfcpp::R_POWERPC_UADDR16
:
6198 case elfcpp::R_POWERPC_ADDR16_LO
:
6199 case elfcpp::R_POWERPC_ADDR16_HI
:
6200 case elfcpp::R_POWERPC_ADDR16_HA
:
6201 ref
= Symbol::ABSOLUTE_REF
;
6204 case elfcpp::R_POWERPC_ADDR24
:
6205 case elfcpp::R_POWERPC_ADDR14
:
6206 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6207 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6208 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
6211 case elfcpp::R_PPC64_REL64
:
6212 case elfcpp::R_POWERPC_REL32
:
6213 case elfcpp::R_PPC_LOCAL24PC
:
6214 case elfcpp::R_POWERPC_REL16
:
6215 case elfcpp::R_POWERPC_REL16_LO
:
6216 case elfcpp::R_POWERPC_REL16_HI
:
6217 case elfcpp::R_POWERPC_REL16_HA
:
6218 ref
= Symbol::RELATIVE_REF
;
6221 case elfcpp::R_POWERPC_REL24
:
6222 case elfcpp::R_PPC_PLTREL24
:
6223 case elfcpp::R_POWERPC_REL14
:
6224 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6225 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6226 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
6229 case elfcpp::R_POWERPC_GOT16
:
6230 case elfcpp::R_POWERPC_GOT16_LO
:
6231 case elfcpp::R_POWERPC_GOT16_HI
:
6232 case elfcpp::R_POWERPC_GOT16_HA
:
6233 case elfcpp::R_PPC64_GOT16_DS
:
6234 case elfcpp::R_PPC64_GOT16_LO_DS
:
6235 case elfcpp::R_PPC64_TOC16
:
6236 case elfcpp::R_PPC64_TOC16_LO
:
6237 case elfcpp::R_PPC64_TOC16_HI
:
6238 case elfcpp::R_PPC64_TOC16_HA
:
6239 case elfcpp::R_PPC64_TOC16_DS
:
6240 case elfcpp::R_PPC64_TOC16_LO_DS
:
6241 ref
= Symbol::RELATIVE_REF
;
6244 case elfcpp::R_POWERPC_GOT_TPREL16
:
6245 case elfcpp::R_POWERPC_TLS
:
6246 ref
= Symbol::TLS_REF
;
6249 case elfcpp::R_POWERPC_COPY
:
6250 case elfcpp::R_POWERPC_GLOB_DAT
:
6251 case elfcpp::R_POWERPC_JMP_SLOT
:
6252 case elfcpp::R_POWERPC_RELATIVE
:
6253 case elfcpp::R_POWERPC_DTPMOD
:
6255 // Not expected. We will give an error later.
6259 if (size
== 64 && target
->abiversion() < 2)
6260 ref
|= Symbol::FUNC_DESC_ABI
;
6264 // Report an unsupported relocation against a local symbol.
6266 template<int size
, bool big_endian
>
6268 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
6269 Sized_relobj_file
<size
, big_endian
>* object
,
6270 unsigned int r_type
)
6272 gold_error(_("%s: unsupported reloc %u against local symbol"),
6273 object
->name().c_str(), r_type
);
6276 // We are about to emit a dynamic relocation of type R_TYPE. If the
6277 // dynamic linker does not support it, issue an error.
6279 template<int size
, bool big_endian
>
6281 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
6282 unsigned int r_type
)
6284 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
6286 // These are the relocation types supported by glibc for both 32-bit
6287 // and 64-bit powerpc.
6290 case elfcpp::R_POWERPC_NONE
:
6291 case elfcpp::R_POWERPC_RELATIVE
:
6292 case elfcpp::R_POWERPC_GLOB_DAT
:
6293 case elfcpp::R_POWERPC_DTPMOD
:
6294 case elfcpp::R_POWERPC_DTPREL
:
6295 case elfcpp::R_POWERPC_TPREL
:
6296 case elfcpp::R_POWERPC_JMP_SLOT
:
6297 case elfcpp::R_POWERPC_COPY
:
6298 case elfcpp::R_POWERPC_IRELATIVE
:
6299 case elfcpp::R_POWERPC_ADDR32
:
6300 case elfcpp::R_POWERPC_UADDR32
:
6301 case elfcpp::R_POWERPC_ADDR24
:
6302 case elfcpp::R_POWERPC_ADDR16
:
6303 case elfcpp::R_POWERPC_UADDR16
:
6304 case elfcpp::R_POWERPC_ADDR16_LO
:
6305 case elfcpp::R_POWERPC_ADDR16_HI
:
6306 case elfcpp::R_POWERPC_ADDR16_HA
:
6307 case elfcpp::R_POWERPC_ADDR14
:
6308 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6309 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6310 case elfcpp::R_POWERPC_REL32
:
6311 case elfcpp::R_POWERPC_REL24
:
6312 case elfcpp::R_POWERPC_TPREL16
:
6313 case elfcpp::R_POWERPC_TPREL16_LO
:
6314 case elfcpp::R_POWERPC_TPREL16_HI
:
6315 case elfcpp::R_POWERPC_TPREL16_HA
:
6326 // These are the relocation types supported only on 64-bit.
6327 case elfcpp::R_PPC64_ADDR64
:
6328 case elfcpp::R_PPC64_UADDR64
:
6329 case elfcpp::R_PPC64_JMP_IREL
:
6330 case elfcpp::R_PPC64_ADDR16_DS
:
6331 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6332 case elfcpp::R_PPC64_ADDR16_HIGH
:
6333 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6334 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6335 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6336 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6337 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6338 case elfcpp::R_PPC64_REL64
:
6339 case elfcpp::R_POWERPC_ADDR30
:
6340 case elfcpp::R_PPC64_TPREL16_DS
:
6341 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6342 case elfcpp::R_PPC64_TPREL16_HIGH
:
6343 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6344 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6345 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6346 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6347 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6358 // These are the relocation types supported only on 32-bit.
6359 // ??? glibc ld.so doesn't need to support these.
6360 case elfcpp::R_POWERPC_DTPREL16
:
6361 case elfcpp::R_POWERPC_DTPREL16_LO
:
6362 case elfcpp::R_POWERPC_DTPREL16_HI
:
6363 case elfcpp::R_POWERPC_DTPREL16_HA
:
6371 // This prevents us from issuing more than one error per reloc
6372 // section. But we can still wind up issuing more than one
6373 // error per object file.
6374 if (this->issued_non_pic_error_
)
6376 gold_assert(parameters
->options().output_is_position_independent());
6377 object
->error(_("requires unsupported dynamic reloc; "
6378 "recompile with -fPIC"));
6379 this->issued_non_pic_error_
= true;
6383 // Return whether we need to make a PLT entry for a relocation of the
6384 // given type against a STT_GNU_IFUNC symbol.
6386 template<int size
, bool big_endian
>
6388 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
6389 Target_powerpc
<size
, big_endian
>* target
,
6390 Sized_relobj_file
<size
, big_endian
>* object
,
6391 unsigned int r_type
,
6394 // In non-pic code any reference will resolve to the plt call stub
6395 // for the ifunc symbol.
6396 if ((size
== 32 || target
->abiversion() >= 2)
6397 && !parameters
->options().output_is_position_independent())
6402 // Word size refs from data sections are OK, but don't need a PLT entry.
6403 case elfcpp::R_POWERPC_ADDR32
:
6404 case elfcpp::R_POWERPC_UADDR32
:
6409 case elfcpp::R_PPC64_ADDR64
:
6410 case elfcpp::R_PPC64_UADDR64
:
6415 // GOT refs are good, but also don't need a PLT entry.
6416 case elfcpp::R_POWERPC_GOT16
:
6417 case elfcpp::R_POWERPC_GOT16_LO
:
6418 case elfcpp::R_POWERPC_GOT16_HI
:
6419 case elfcpp::R_POWERPC_GOT16_HA
:
6420 case elfcpp::R_PPC64_GOT16_DS
:
6421 case elfcpp::R_PPC64_GOT16_LO_DS
:
6424 // Function calls are good, and these do need a PLT entry.
6425 case elfcpp::R_POWERPC_ADDR24
:
6426 case elfcpp::R_POWERPC_ADDR14
:
6427 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6428 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6429 case elfcpp::R_POWERPC_REL24
:
6430 case elfcpp::R_PPC_PLTREL24
:
6431 case elfcpp::R_POWERPC_REL14
:
6432 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6433 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6440 // Anything else is a problem.
6441 // If we are building a static executable, the libc startup function
6442 // responsible for applying indirect function relocations is going
6443 // to complain about the reloc type.
6444 // If we are building a dynamic executable, we will have a text
6445 // relocation. The dynamic loader will set the text segment
6446 // writable and non-executable to apply text relocations. So we'll
6447 // segfault when trying to run the indirection function to resolve
6450 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6451 object
->name().c_str(), r_type
);
6455 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6459 ok_lo_toc_insn(uint32_t insn
, unsigned int r_type
)
6461 return ((insn
& (0x3f << 26)) == 12u << 26 /* addic */
6462 || (insn
& (0x3f << 26)) == 14u << 26 /* addi */
6463 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6464 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6465 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6466 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6467 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6468 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6469 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6470 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6471 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6472 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6473 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6474 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6475 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6476 || (insn
& (0x3f << 26)) == 56u << 26 /* lq,lfq */
6477 || ((insn
& (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6478 /* Exclude lfqu by testing reloc. If relocs are ever
6479 defined for the reduced D field in psq_lu then those
6480 will need testing too. */
6481 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6482 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6483 || ((insn
& (0x3f << 26)) == 58u << 26 /* ld,lwa */
6485 || (insn
& (0x3f << 26)) == 60u << 26 /* stfq */
6486 || ((insn
& (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6487 /* Exclude stfqu. psq_stu as above for psq_lu. */
6488 && r_type
!= elfcpp::R_PPC64_TOC16_LO
6489 && r_type
!= elfcpp::R_POWERPC_GOT16_LO
)
6490 || ((insn
& (0x3f << 26)) == 62u << 26 /* std,stq */
6491 && (insn
& 1) == 0));
6494 // Scan a relocation for a local symbol.
6496 template<int size
, bool big_endian
>
6498 Target_powerpc
<size
, big_endian
>::Scan::local(
6499 Symbol_table
* symtab
,
6501 Target_powerpc
<size
, big_endian
>* target
,
6502 Sized_relobj_file
<size
, big_endian
>* object
,
6503 unsigned int data_shndx
,
6504 Output_section
* output_section
,
6505 const elfcpp::Rela
<size
, big_endian
>& reloc
,
6506 unsigned int r_type
,
6507 const elfcpp::Sym
<size
, big_endian
>& lsym
,
6510 this->maybe_skip_tls_get_addr_call(target
, r_type
, NULL
);
6512 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6513 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6515 this->expect_tls_get_addr_call();
6516 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6517 if (tls_type
!= tls::TLSOPT_NONE
)
6518 this->skip_next_tls_get_addr_call();
6520 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6521 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6523 this->expect_tls_get_addr_call();
6524 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6525 if (tls_type
!= tls::TLSOPT_NONE
)
6526 this->skip_next_tls_get_addr_call();
6529 Powerpc_relobj
<size
, big_endian
>* ppc_object
6530 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6535 && data_shndx
== ppc_object
->opd_shndx()
6536 && r_type
== elfcpp::R_PPC64_ADDR64
)
6537 ppc_object
->set_opd_discard(reloc
.get_r_offset());
6541 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6542 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
6543 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
6545 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6546 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6547 r_type
, r_sym
, reloc
.get_r_addend());
6548 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
6553 case elfcpp::R_POWERPC_NONE
:
6554 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6555 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6556 case elfcpp::R_POWERPC_TLS
:
6557 case elfcpp::R_PPC64_ENTRY
:
6560 case elfcpp::R_PPC64_TOC
:
6562 Output_data_got_powerpc
<size
, big_endian
>* got
6563 = target
->got_section(symtab
, layout
);
6564 if (parameters
->options().output_is_position_independent())
6566 Address off
= reloc
.get_r_offset();
6568 && target
->abiversion() < 2
6569 && data_shndx
== ppc_object
->opd_shndx()
6570 && ppc_object
->get_opd_discard(off
- 8))
6573 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6574 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
6575 rela_dyn
->add_output_section_relative(got
->output_section(),
6576 elfcpp::R_POWERPC_RELATIVE
,
6578 object
, data_shndx
, off
,
6579 symobj
->toc_base_offset());
6584 case elfcpp::R_PPC64_ADDR64
:
6585 case elfcpp::R_PPC64_UADDR64
:
6586 case elfcpp::R_POWERPC_ADDR32
:
6587 case elfcpp::R_POWERPC_UADDR32
:
6588 case elfcpp::R_POWERPC_ADDR24
:
6589 case elfcpp::R_POWERPC_ADDR16
:
6590 case elfcpp::R_POWERPC_ADDR16_LO
:
6591 case elfcpp::R_POWERPC_ADDR16_HI
:
6592 case elfcpp::R_POWERPC_ADDR16_HA
:
6593 case elfcpp::R_POWERPC_UADDR16
:
6594 case elfcpp::R_PPC64_ADDR16_HIGH
:
6595 case elfcpp::R_PPC64_ADDR16_HIGHA
:
6596 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6597 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6598 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6599 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6600 case elfcpp::R_PPC64_ADDR16_DS
:
6601 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6602 case elfcpp::R_POWERPC_ADDR14
:
6603 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6604 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6605 // If building a shared library (or a position-independent
6606 // executable), we need to create a dynamic relocation for
6608 if (parameters
->options().output_is_position_independent()
6609 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
6611 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6613 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6614 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
6615 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
6617 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6618 : elfcpp::R_POWERPC_RELATIVE
);
6619 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6620 output_section
, data_shndx
,
6621 reloc
.get_r_offset(),
6622 reloc
.get_r_addend(), false);
6624 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
6626 check_non_pic(object
, r_type
);
6627 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
6628 data_shndx
, reloc
.get_r_offset(),
6629 reloc
.get_r_addend());
6633 gold_assert(lsym
.get_st_value() == 0);
6634 unsigned int shndx
= lsym
.get_st_shndx();
6636 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
6639 object
->error(_("section symbol %u has bad shndx %u"),
6642 rela_dyn
->add_local_section(object
, shndx
, r_type
,
6643 output_section
, data_shndx
,
6644 reloc
.get_r_offset());
6649 case elfcpp::R_POWERPC_REL24
:
6650 case elfcpp::R_PPC_PLTREL24
:
6651 case elfcpp::R_PPC_LOCAL24PC
:
6652 case elfcpp::R_POWERPC_REL14
:
6653 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6654 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6657 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6658 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6659 r_type
, r_sym
, reloc
.get_r_addend());
6663 case elfcpp::R_PPC64_TOCSAVE
:
6664 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6665 // caller has already saved r2 and thus a plt call stub need not
6668 && target
->mark_pltcall(ppc_object
, data_shndx
,
6669 reloc
.get_r_offset() - 4, symtab
))
6671 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6672 unsigned int shndx
= lsym
.get_st_shndx();
6674 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6676 object
->error(_("tocsave symbol %u has bad shndx %u"),
6679 target
->add_tocsave(ppc_object
, shndx
,
6680 lsym
.get_st_value() + reloc
.get_r_addend());
6684 case elfcpp::R_PPC64_REL64
:
6685 case elfcpp::R_POWERPC_REL32
:
6686 case elfcpp::R_POWERPC_REL16
:
6687 case elfcpp::R_POWERPC_REL16_LO
:
6688 case elfcpp::R_POWERPC_REL16_HI
:
6689 case elfcpp::R_POWERPC_REL16_HA
:
6690 case elfcpp::R_POWERPC_REL16DX_HA
:
6691 case elfcpp::R_POWERPC_SECTOFF
:
6692 case elfcpp::R_POWERPC_SECTOFF_LO
:
6693 case elfcpp::R_POWERPC_SECTOFF_HI
:
6694 case elfcpp::R_POWERPC_SECTOFF_HA
:
6695 case elfcpp::R_PPC64_SECTOFF_DS
:
6696 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6697 case elfcpp::R_POWERPC_TPREL16
:
6698 case elfcpp::R_POWERPC_TPREL16_LO
:
6699 case elfcpp::R_POWERPC_TPREL16_HI
:
6700 case elfcpp::R_POWERPC_TPREL16_HA
:
6701 case elfcpp::R_PPC64_TPREL16_DS
:
6702 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6703 case elfcpp::R_PPC64_TPREL16_HIGH
:
6704 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6705 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6706 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6707 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6708 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6709 case elfcpp::R_POWERPC_DTPREL16
:
6710 case elfcpp::R_POWERPC_DTPREL16_LO
:
6711 case elfcpp::R_POWERPC_DTPREL16_HI
:
6712 case elfcpp::R_POWERPC_DTPREL16_HA
:
6713 case elfcpp::R_PPC64_DTPREL16_DS
:
6714 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6715 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6716 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6717 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6718 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6719 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6720 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6721 case elfcpp::R_PPC64_TLSGD
:
6722 case elfcpp::R_PPC64_TLSLD
:
6723 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6726 case elfcpp::R_POWERPC_GOT16
:
6727 case elfcpp::R_POWERPC_GOT16_LO
:
6728 case elfcpp::R_POWERPC_GOT16_HI
:
6729 case elfcpp::R_POWERPC_GOT16_HA
:
6730 case elfcpp::R_PPC64_GOT16_DS
:
6731 case elfcpp::R_PPC64_GOT16_LO_DS
:
6733 // The symbol requires a GOT entry.
6734 Output_data_got_powerpc
<size
, big_endian
>* got
6735 = target
->got_section(symtab
, layout
);
6736 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6738 if (!parameters
->options().output_is_position_independent())
6741 && (size
== 32 || target
->abiversion() >= 2))
6742 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
6744 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
6746 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
6748 // If we are generating a shared object or a pie, this
6749 // symbol's GOT entry will be set by a dynamic relocation.
6751 off
= got
->add_constant(0);
6752 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
6754 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
6756 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6757 : elfcpp::R_POWERPC_RELATIVE
);
6758 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
6759 got
, off
, 0, false);
6764 case elfcpp::R_PPC64_TOC16
:
6765 case elfcpp::R_PPC64_TOC16_LO
:
6766 case elfcpp::R_PPC64_TOC16_HI
:
6767 case elfcpp::R_PPC64_TOC16_HA
:
6768 case elfcpp::R_PPC64_TOC16_DS
:
6769 case elfcpp::R_PPC64_TOC16_LO_DS
:
6770 // We need a GOT section.
6771 target
->got_section(symtab
, layout
);
6774 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6775 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6776 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6777 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6779 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
6780 if (tls_type
== tls::TLSOPT_NONE
)
6782 Output_data_got_powerpc
<size
, big_endian
>* got
6783 = target
->got_section(symtab
, layout
);
6784 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6785 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6786 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
6787 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
6789 else if (tls_type
== tls::TLSOPT_TO_LE
)
6791 // no GOT relocs needed for Local Exec.
6798 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6799 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6800 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6801 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6803 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6804 if (tls_type
== tls::TLSOPT_NONE
)
6805 target
->tlsld_got_offset(symtab
, layout
, object
);
6806 else if (tls_type
== tls::TLSOPT_TO_LE
)
6808 // no GOT relocs needed for Local Exec.
6809 if (parameters
->options().emit_relocs())
6811 Output_section
* os
= layout
->tls_segment()->first_section();
6812 gold_assert(os
!= NULL
);
6813 os
->set_needs_symtab_index();
6821 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6822 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6823 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6824 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6826 Output_data_got_powerpc
<size
, big_endian
>* got
6827 = target
->got_section(symtab
, layout
);
6828 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6829 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
6833 case elfcpp::R_POWERPC_GOT_TPREL16
:
6834 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6835 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6836 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6838 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
6839 if (tls_type
== tls::TLSOPT_NONE
)
6841 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6842 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
6844 Output_data_got_powerpc
<size
, big_endian
>* got
6845 = target
->got_section(symtab
, layout
);
6846 unsigned int off
= got
->add_constant(0);
6847 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
6849 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6850 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
6851 elfcpp::R_POWERPC_TPREL
,
6855 else if (tls_type
== tls::TLSOPT_TO_LE
)
6857 // no GOT relocs needed for Local Exec.
6865 unsupported_reloc_local(object
, r_type
);
6870 && parameters
->options().toc_optimize())
6872 if (data_shndx
== ppc_object
->toc_shndx())
6875 if (r_type
!= elfcpp::R_PPC64_ADDR64
6876 || (is_ifunc
&& target
->abiversion() < 2))
6878 else if (parameters
->options().output_is_position_independent())
6884 unsigned int shndx
= lsym
.get_st_shndx();
6885 if (shndx
>= elfcpp::SHN_LORESERVE
6886 && shndx
!= elfcpp::SHN_XINDEX
)
6891 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
6894 enum {no_check
, check_lo
, check_ha
} insn_check
;
6898 insn_check
= no_check
;
6901 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6902 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6903 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6904 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6905 case elfcpp::R_POWERPC_GOT16_HA
:
6906 case elfcpp::R_PPC64_TOC16_HA
:
6907 insn_check
= check_ha
;
6910 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6911 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6912 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6913 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6914 case elfcpp::R_POWERPC_GOT16_LO
:
6915 case elfcpp::R_PPC64_GOT16_LO_DS
:
6916 case elfcpp::R_PPC64_TOC16_LO
:
6917 case elfcpp::R_PPC64_TOC16_LO_DS
:
6918 insn_check
= check_lo
;
6922 section_size_type slen
;
6923 const unsigned char* view
= NULL
;
6924 if (insn_check
!= no_check
)
6926 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
6927 section_size_type off
=
6928 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
6931 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
6932 if (insn_check
== check_lo
6933 ? !ok_lo_toc_insn(insn
, r_type
)
6934 : ((insn
& ((0x3f << 26) | 0x1f << 16))
6935 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6937 ppc_object
->set_no_toc_opt();
6938 gold_warning(_("%s: toc optimization is not supported "
6939 "for %#08x instruction"),
6940 ppc_object
->name().c_str(), insn
);
6949 case elfcpp::R_PPC64_TOC16
:
6950 case elfcpp::R_PPC64_TOC16_LO
:
6951 case elfcpp::R_PPC64_TOC16_HI
:
6952 case elfcpp::R_PPC64_TOC16_HA
:
6953 case elfcpp::R_PPC64_TOC16_DS
:
6954 case elfcpp::R_PPC64_TOC16_LO_DS
:
6955 unsigned int shndx
= lsym
.get_st_shndx();
6956 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
6958 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
6959 if (is_ordinary
&& shndx
== ppc_object
->toc_shndx())
6961 Address dst_off
= lsym
.get_st_value() + reloc
.get_r_addend();
6962 if (dst_off
< ppc_object
->section_size(shndx
))
6965 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
6967 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
6969 // Need to check that the insn is a ld
6971 view
= ppc_object
->section_contents(data_shndx
,
6974 section_size_type off
=
6975 (convert_to_section_size_type(reloc
.get_r_offset())
6976 + (big_endian
? -2 : 3));
6978 && (view
[off
] & (0x3f << 2)) == 58u << 2)
6982 ppc_object
->set_no_toc_opt(dst_off
);
6993 case elfcpp::R_POWERPC_REL32
:
6994 if (ppc_object
->got2_shndx() != 0
6995 && parameters
->options().output_is_position_independent())
6997 unsigned int shndx
= lsym
.get_st_shndx();
6998 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7000 shndx
= ppc_object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
7001 if (is_ordinary
&& shndx
== ppc_object
->got2_shndx()
7002 && (ppc_object
->section_flags(data_shndx
)
7003 & elfcpp::SHF_EXECINSTR
) != 0)
7004 gold_error(_("%s: unsupported -mbss-plt code"),
7005 ppc_object
->name().c_str());
7015 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7016 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7017 case elfcpp::R_POWERPC_GOT_TPREL16
:
7018 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7019 case elfcpp::R_POWERPC_GOT16
:
7020 case elfcpp::R_PPC64_GOT16_DS
:
7021 case elfcpp::R_PPC64_TOC16
:
7022 case elfcpp::R_PPC64_TOC16_DS
:
7023 ppc_object
->set_has_small_toc_reloc();
7029 // Report an unsupported relocation against a global symbol.
7031 template<int size
, bool big_endian
>
7033 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
7034 Sized_relobj_file
<size
, big_endian
>* object
,
7035 unsigned int r_type
,
7038 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
7039 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
7042 // Scan a relocation for a global symbol.
7044 template<int size
, bool big_endian
>
7046 Target_powerpc
<size
, big_endian
>::Scan::global(
7047 Symbol_table
* symtab
,
7049 Target_powerpc
<size
, big_endian
>* target
,
7050 Sized_relobj_file
<size
, big_endian
>* object
,
7051 unsigned int data_shndx
,
7052 Output_section
* output_section
,
7053 const elfcpp::Rela
<size
, big_endian
>& reloc
,
7054 unsigned int r_type
,
7057 if (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
)
7061 if (target
->replace_tls_get_addr(gsym
))
7062 // Change a __tls_get_addr reference to __tls_get_addr_opt
7063 // so dynamic relocs are emitted against the latter symbol.
7064 gsym
= target
->tls_get_addr_opt();
7066 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7067 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7069 this->expect_tls_get_addr_call();
7070 const bool final
= gsym
->final_value_is_known();
7071 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7072 if (tls_type
!= tls::TLSOPT_NONE
)
7073 this->skip_next_tls_get_addr_call();
7075 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7076 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7078 this->expect_tls_get_addr_call();
7079 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7080 if (tls_type
!= tls::TLSOPT_NONE
)
7081 this->skip_next_tls_get_addr_call();
7084 Powerpc_relobj
<size
, big_endian
>* ppc_object
7085 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7087 // A STT_GNU_IFUNC symbol may require a PLT entry.
7088 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
7089 bool pushed_ifunc
= false;
7090 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
7092 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7093 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7094 r_type
, r_sym
, reloc
.get_r_addend());
7095 target
->make_plt_entry(symtab
, layout
, gsym
);
7096 pushed_ifunc
= true;
7101 case elfcpp::R_POWERPC_NONE
:
7102 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7103 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7104 case elfcpp::R_PPC_LOCAL24PC
:
7105 case elfcpp::R_POWERPC_TLS
:
7106 case elfcpp::R_PPC64_ENTRY
:
7109 case elfcpp::R_PPC64_TOC
:
7111 Output_data_got_powerpc
<size
, big_endian
>* got
7112 = target
->got_section(symtab
, layout
);
7113 if (parameters
->options().output_is_position_independent())
7115 Address off
= reloc
.get_r_offset();
7117 && data_shndx
== ppc_object
->opd_shndx()
7118 && ppc_object
->get_opd_discard(off
- 8))
7121 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7122 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
7123 if (data_shndx
!= ppc_object
->opd_shndx())
7124 symobj
= static_cast
7125 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7126 rela_dyn
->add_output_section_relative(got
->output_section(),
7127 elfcpp::R_POWERPC_RELATIVE
,
7129 object
, data_shndx
, off
,
7130 symobj
->toc_base_offset());
7135 case elfcpp::R_PPC64_ADDR64
:
7137 && target
->abiversion() < 2
7138 && data_shndx
== ppc_object
->opd_shndx()
7139 && (gsym
->is_defined_in_discarded_section()
7140 || gsym
->object() != object
))
7142 ppc_object
->set_opd_discard(reloc
.get_r_offset());
7146 case elfcpp::R_PPC64_UADDR64
:
7147 case elfcpp::R_POWERPC_ADDR32
:
7148 case elfcpp::R_POWERPC_UADDR32
:
7149 case elfcpp::R_POWERPC_ADDR24
:
7150 case elfcpp::R_POWERPC_ADDR16
:
7151 case elfcpp::R_POWERPC_ADDR16_LO
:
7152 case elfcpp::R_POWERPC_ADDR16_HI
:
7153 case elfcpp::R_POWERPC_ADDR16_HA
:
7154 case elfcpp::R_POWERPC_UADDR16
:
7155 case elfcpp::R_PPC64_ADDR16_HIGH
:
7156 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7157 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7158 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7159 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7160 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7161 case elfcpp::R_PPC64_ADDR16_DS
:
7162 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7163 case elfcpp::R_POWERPC_ADDR14
:
7164 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7165 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7167 // Make a PLT entry if necessary.
7168 if (gsym
->needs_plt_entry())
7170 // Since this is not a PC-relative relocation, we may be
7171 // taking the address of a function. In that case we need to
7172 // set the entry in the dynamic symbol table to the address of
7173 // the PLT call stub.
7174 bool need_ifunc_plt
= false;
7175 if ((size
== 32 || target
->abiversion() >= 2)
7176 && gsym
->is_from_dynobj()
7177 && !parameters
->options().output_is_position_independent())
7179 gsym
->set_needs_dynsym_value();
7180 need_ifunc_plt
= true;
7182 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
7184 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7185 target
->push_branch(ppc_object
, data_shndx
,
7186 reloc
.get_r_offset(), r_type
, r_sym
,
7187 reloc
.get_r_addend());
7188 target
->make_plt_entry(symtab
, layout
, gsym
);
7191 // Make a dynamic relocation if necessary.
7192 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
7193 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
7195 if (!parameters
->options().output_is_position_independent()
7196 && gsym
->may_need_copy_reloc())
7198 target
->copy_reloc(symtab
, layout
, object
,
7199 data_shndx
, output_section
, gsym
, reloc
);
7201 else if ((((size
== 32
7202 && r_type
== elfcpp::R_POWERPC_ADDR32
)
7204 && r_type
== elfcpp::R_PPC64_ADDR64
7205 && target
->abiversion() >= 2))
7206 && gsym
->can_use_relative_reloc(false)
7207 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
7208 && parameters
->options().shared()))
7210 && r_type
== elfcpp::R_PPC64_ADDR64
7211 && target
->abiversion() < 2
7212 && (gsym
->can_use_relative_reloc(false)
7213 || data_shndx
== ppc_object
->opd_shndx())))
7215 Reloc_section
* rela_dyn
7216 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7217 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7218 : elfcpp::R_POWERPC_RELATIVE
);
7219 rela_dyn
->add_symbolless_global_addend(
7220 gsym
, dynrel
, output_section
, object
, data_shndx
,
7221 reloc
.get_r_offset(), reloc
.get_r_addend());
7225 Reloc_section
* rela_dyn
7226 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7227 check_non_pic(object
, r_type
);
7228 rela_dyn
->add_global(gsym
, r_type
, output_section
,
7230 reloc
.get_r_offset(),
7231 reloc
.get_r_addend());
7234 && parameters
->options().toc_optimize()
7235 && data_shndx
== ppc_object
->toc_shndx())
7236 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7242 case elfcpp::R_PPC_PLTREL24
:
7243 case elfcpp::R_POWERPC_REL24
:
7246 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7247 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7248 r_type
, r_sym
, reloc
.get_r_addend());
7249 if (gsym
->needs_plt_entry()
7250 || (!gsym
->final_value_is_known()
7251 && (gsym
->is_undefined()
7252 || gsym
->is_from_dynobj()
7253 || gsym
->is_preemptible())))
7254 target
->make_plt_entry(symtab
, layout
, gsym
);
7258 case elfcpp::R_PPC64_REL64
:
7259 case elfcpp::R_POWERPC_REL32
:
7260 // Make a dynamic relocation if necessary.
7261 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
7263 if (!parameters
->options().output_is_position_independent()
7264 && gsym
->may_need_copy_reloc())
7266 target
->copy_reloc(symtab
, layout
, object
,
7267 data_shndx
, output_section
, gsym
,
7272 Reloc_section
* rela_dyn
7273 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7274 check_non_pic(object
, r_type
);
7275 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
7276 data_shndx
, reloc
.get_r_offset(),
7277 reloc
.get_r_addend());
7282 case elfcpp::R_POWERPC_REL14
:
7283 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7284 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7287 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7288 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
7289 r_type
, r_sym
, reloc
.get_r_addend());
7293 case elfcpp::R_PPC64_TOCSAVE
:
7294 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7295 // caller has already saved r2 and thus a plt call stub need not
7298 && target
->mark_pltcall(ppc_object
, data_shndx
,
7299 reloc
.get_r_offset() - 4, symtab
))
7301 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
7303 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7305 object
->error(_("tocsave symbol %u has bad shndx %u"),
7309 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7310 target
->add_tocsave(ppc_object
, shndx
,
7311 sym
->value() + reloc
.get_r_addend());
7316 case elfcpp::R_POWERPC_REL16
:
7317 case elfcpp::R_POWERPC_REL16_LO
:
7318 case elfcpp::R_POWERPC_REL16_HI
:
7319 case elfcpp::R_POWERPC_REL16_HA
:
7320 case elfcpp::R_POWERPC_REL16DX_HA
:
7321 case elfcpp::R_POWERPC_SECTOFF
:
7322 case elfcpp::R_POWERPC_SECTOFF_LO
:
7323 case elfcpp::R_POWERPC_SECTOFF_HI
:
7324 case elfcpp::R_POWERPC_SECTOFF_HA
:
7325 case elfcpp::R_PPC64_SECTOFF_DS
:
7326 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7327 case elfcpp::R_POWERPC_TPREL16
:
7328 case elfcpp::R_POWERPC_TPREL16_LO
:
7329 case elfcpp::R_POWERPC_TPREL16_HI
:
7330 case elfcpp::R_POWERPC_TPREL16_HA
:
7331 case elfcpp::R_PPC64_TPREL16_DS
:
7332 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7333 case elfcpp::R_PPC64_TPREL16_HIGH
:
7334 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7335 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7336 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7337 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7338 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7339 case elfcpp::R_POWERPC_DTPREL16
:
7340 case elfcpp::R_POWERPC_DTPREL16_LO
:
7341 case elfcpp::R_POWERPC_DTPREL16_HI
:
7342 case elfcpp::R_POWERPC_DTPREL16_HA
:
7343 case elfcpp::R_PPC64_DTPREL16_DS
:
7344 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7345 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7346 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7347 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7348 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7349 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7350 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7351 case elfcpp::R_PPC64_TLSGD
:
7352 case elfcpp::R_PPC64_TLSLD
:
7353 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7356 case elfcpp::R_POWERPC_GOT16
:
7357 case elfcpp::R_POWERPC_GOT16_LO
:
7358 case elfcpp::R_POWERPC_GOT16_HI
:
7359 case elfcpp::R_POWERPC_GOT16_HA
:
7360 case elfcpp::R_PPC64_GOT16_DS
:
7361 case elfcpp::R_PPC64_GOT16_LO_DS
:
7363 // The symbol requires a GOT entry.
7364 Output_data_got_powerpc
<size
, big_endian
>* got
;
7366 got
= target
->got_section(symtab
, layout
);
7367 if (gsym
->final_value_is_known())
7370 && (size
== 32 || target
->abiversion() >= 2))
7371 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
7373 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
7375 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
7377 // If we are generating a shared object or a pie, this
7378 // symbol's GOT entry will be set by a dynamic relocation.
7379 unsigned int off
= got
->add_constant(0);
7380 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
7382 Reloc_section
* rela_dyn
7383 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
7385 if (gsym
->can_use_relative_reloc(false)
7387 || target
->abiversion() >= 2)
7388 && gsym
->visibility() == elfcpp::STV_PROTECTED
7389 && parameters
->options().shared()))
7391 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
7392 : elfcpp::R_POWERPC_RELATIVE
);
7393 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
7397 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
7398 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
7404 case elfcpp::R_PPC64_TOC16
:
7405 case elfcpp::R_PPC64_TOC16_LO
:
7406 case elfcpp::R_PPC64_TOC16_HI
:
7407 case elfcpp::R_PPC64_TOC16_HA
:
7408 case elfcpp::R_PPC64_TOC16_DS
:
7409 case elfcpp::R_PPC64_TOC16_LO_DS
:
7410 // We need a GOT section.
7411 target
->got_section(symtab
, layout
);
7414 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7415 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7416 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7417 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7419 const bool final
= gsym
->final_value_is_known();
7420 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7421 if (tls_type
== tls::TLSOPT_NONE
)
7423 Output_data_got_powerpc
<size
, big_endian
>* got
7424 = target
->got_section(symtab
, layout
);
7425 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7426 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
7427 elfcpp::R_POWERPC_DTPMOD
,
7428 elfcpp::R_POWERPC_DTPREL
);
7430 else if (tls_type
== tls::TLSOPT_TO_IE
)
7432 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7434 Output_data_got_powerpc
<size
, big_endian
>* got
7435 = target
->got_section(symtab
, layout
);
7436 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7437 if (gsym
->is_undefined()
7438 || gsym
->is_from_dynobj())
7440 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7441 elfcpp::R_POWERPC_TPREL
);
7445 unsigned int off
= got
->add_constant(0);
7446 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7447 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7448 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7453 else if (tls_type
== tls::TLSOPT_TO_LE
)
7455 // no GOT relocs needed for Local Exec.
7462 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7463 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7464 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7465 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7467 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7468 if (tls_type
== tls::TLSOPT_NONE
)
7469 target
->tlsld_got_offset(symtab
, layout
, object
);
7470 else if (tls_type
== tls::TLSOPT_TO_LE
)
7472 // no GOT relocs needed for Local Exec.
7473 if (parameters
->options().emit_relocs())
7475 Output_section
* os
= layout
->tls_segment()->first_section();
7476 gold_assert(os
!= NULL
);
7477 os
->set_needs_symtab_index();
7485 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7486 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7487 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7488 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7490 Output_data_got_powerpc
<size
, big_endian
>* got
7491 = target
->got_section(symtab
, layout
);
7492 if (!gsym
->final_value_is_known()
7493 && (gsym
->is_from_dynobj()
7494 || gsym
->is_undefined()
7495 || gsym
->is_preemptible()))
7496 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
7497 target
->rela_dyn_section(layout
),
7498 elfcpp::R_POWERPC_DTPREL
);
7500 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
7504 case elfcpp::R_POWERPC_GOT_TPREL16
:
7505 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7506 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7507 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7509 const bool final
= gsym
->final_value_is_known();
7510 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7511 if (tls_type
== tls::TLSOPT_NONE
)
7513 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
7515 Output_data_got_powerpc
<size
, big_endian
>* got
7516 = target
->got_section(symtab
, layout
);
7517 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
7518 if (gsym
->is_undefined()
7519 || gsym
->is_from_dynobj())
7521 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
7522 elfcpp::R_POWERPC_TPREL
);
7526 unsigned int off
= got
->add_constant(0);
7527 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
7528 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
7529 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
7534 else if (tls_type
== tls::TLSOPT_TO_LE
)
7536 // no GOT relocs needed for Local Exec.
7544 unsupported_reloc_global(object
, r_type
, gsym
);
7549 && parameters
->options().toc_optimize())
7551 if (data_shndx
== ppc_object
->toc_shndx())
7554 if (r_type
!= elfcpp::R_PPC64_ADDR64
7555 || (is_ifunc
&& target
->abiversion() < 2))
7557 else if (parameters
->options().output_is_position_independent()
7558 && (is_ifunc
|| gsym
->is_absolute() || gsym
->is_undefined()))
7561 ppc_object
->set_no_toc_opt(reloc
.get_r_offset());
7564 enum {no_check
, check_lo
, check_ha
} insn_check
;
7568 insn_check
= no_check
;
7571 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7572 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7573 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7574 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7575 case elfcpp::R_POWERPC_GOT16_HA
:
7576 case elfcpp::R_PPC64_TOC16_HA
:
7577 insn_check
= check_ha
;
7580 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7581 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7582 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7583 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7584 case elfcpp::R_POWERPC_GOT16_LO
:
7585 case elfcpp::R_PPC64_GOT16_LO_DS
:
7586 case elfcpp::R_PPC64_TOC16_LO
:
7587 case elfcpp::R_PPC64_TOC16_LO_DS
:
7588 insn_check
= check_lo
;
7592 section_size_type slen
;
7593 const unsigned char* view
= NULL
;
7594 if (insn_check
!= no_check
)
7596 view
= ppc_object
->section_contents(data_shndx
, &slen
, false);
7597 section_size_type off
=
7598 convert_to_section_size_type(reloc
.get_r_offset()) & -4;
7601 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(view
+ off
);
7602 if (insn_check
== check_lo
7603 ? !ok_lo_toc_insn(insn
, r_type
)
7604 : ((insn
& ((0x3f << 26) | 0x1f << 16))
7605 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7607 ppc_object
->set_no_toc_opt();
7608 gold_warning(_("%s: toc optimization is not supported "
7609 "for %#08x instruction"),
7610 ppc_object
->name().c_str(), insn
);
7619 case elfcpp::R_PPC64_TOC16
:
7620 case elfcpp::R_PPC64_TOC16_LO
:
7621 case elfcpp::R_PPC64_TOC16_HI
:
7622 case elfcpp::R_PPC64_TOC16_HA
:
7623 case elfcpp::R_PPC64_TOC16_DS
:
7624 case elfcpp::R_PPC64_TOC16_LO_DS
:
7625 if (gsym
->source() == Symbol::FROM_OBJECT
7626 && !gsym
->object()->is_dynamic())
7628 Powerpc_relobj
<size
, big_endian
>* sym_object
7629 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
7631 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
7632 if (shndx
== sym_object
->toc_shndx())
7634 Sized_symbol
<size
>* sym
= symtab
->get_sized_symbol
<size
>(gsym
);
7635 Address dst_off
= sym
->value() + reloc
.get_r_addend();
7636 if (dst_off
< sym_object
->section_size(shndx
))
7639 if (r_type
== elfcpp::R_PPC64_TOC16_HA
)
7641 else if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
)
7643 // Need to check that the insn is a ld
7645 view
= ppc_object
->section_contents(data_shndx
,
7648 section_size_type off
=
7649 (convert_to_section_size_type(reloc
.get_r_offset())
7650 + (big_endian
? -2 : 3));
7652 && (view
[off
] & (0x3f << 2)) == (58u << 2))
7656 sym_object
->set_no_toc_opt(dst_off
);
7668 case elfcpp::R_PPC_LOCAL24PC
:
7669 if (strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7670 gold_error(_("%s: unsupported -mbss-plt code"),
7671 ppc_object
->name().c_str());
7680 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7681 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7682 case elfcpp::R_POWERPC_GOT_TPREL16
:
7683 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7684 case elfcpp::R_POWERPC_GOT16
:
7685 case elfcpp::R_PPC64_GOT16_DS
:
7686 case elfcpp::R_PPC64_TOC16
:
7687 case elfcpp::R_PPC64_TOC16_DS
:
7688 ppc_object
->set_has_small_toc_reloc();
7694 // Process relocations for gc.
7696 template<int size
, bool big_endian
>
7698 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
7699 Symbol_table
* symtab
,
7701 Sized_relobj_file
<size
, big_endian
>* object
,
7702 unsigned int data_shndx
,
7704 const unsigned char* prelocs
,
7706 Output_section
* output_section
,
7707 bool needs_special_offset_handling
,
7708 size_t local_symbol_count
,
7709 const unsigned char* plocal_symbols
)
7711 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7712 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7715 Powerpc_relobj
<size
, big_endian
>* ppc_object
7716 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
7718 ppc_object
->set_opd_valid();
7719 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
7721 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
7722 for (p
= ppc_object
->access_from_map()->begin();
7723 p
!= ppc_object
->access_from_map()->end();
7726 Address dst_off
= p
->first
;
7727 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7728 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
7729 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
7731 Relobj
* src_obj
= s
->first
;
7732 unsigned int src_indx
= s
->second
;
7733 symtab
->gc()->add_reference(src_obj
, src_indx
,
7734 ppc_object
, dst_indx
);
7738 ppc_object
->access_from_map()->clear();
7739 ppc_object
->process_gc_mark(symtab
);
7740 // Don't look at .opd relocs as .opd will reference everything.
7744 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
7753 needs_special_offset_handling
,
7758 // Handle target specific gc actions when adding a gc reference from
7759 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7760 // and DST_OFF. For powerpc64, this adds a referenc to the code
7761 // section of a function descriptor.
7763 template<int size
, bool big_endian
>
7765 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
7766 Symbol_table
* symtab
,
7768 unsigned int src_shndx
,
7770 unsigned int dst_shndx
,
7771 Address dst_off
) const
7773 if (size
!= 64 || dst_obj
->is_dynamic())
7776 Powerpc_relobj
<size
, big_endian
>* ppc_object
7777 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
7778 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
7780 if (ppc_object
->opd_valid())
7782 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
7783 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
7787 // If we haven't run scan_opd_relocs, we must delay
7788 // processing this function descriptor reference.
7789 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
7794 // Add any special sections for this symbol to the gc work list.
7795 // For powerpc64, this adds the code section of a function
7798 template<int size
, bool big_endian
>
7800 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
7801 Symbol_table
* symtab
,
7806 Powerpc_relobj
<size
, big_endian
>* ppc_object
7807 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
7809 unsigned int shndx
= sym
->shndx(&is_ordinary
);
7810 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
7812 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
7813 Address dst_off
= gsym
->value();
7814 if (ppc_object
->opd_valid())
7816 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
7817 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
7821 ppc_object
->add_gc_mark(dst_off
);
7826 // For a symbol location in .opd, set LOC to the location of the
7829 template<int size
, bool big_endian
>
7831 Target_powerpc
<size
, big_endian
>::do_function_location(
7832 Symbol_location
* loc
) const
7834 if (size
== 64 && loc
->shndx
!= 0)
7836 if (loc
->object
->is_dynamic())
7838 Powerpc_dynobj
<size
, big_endian
>* ppc_object
7839 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
7840 if (loc
->shndx
== ppc_object
->opd_shndx())
7843 Address off
= loc
->offset
- ppc_object
->opd_address();
7844 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
7845 loc
->offset
= dest_off
;
7850 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7851 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
7852 if (loc
->shndx
== ppc_object
->opd_shndx())
7855 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
7856 loc
->offset
= dest_off
;
7862 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7863 // compiled with -fsplit-stack. The function calls non-split-stack
7864 // code. Change the function to ensure it has enough stack space to
7865 // call some random function.
7867 template<int size
, bool big_endian
>
7869 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
7872 section_offset_type fnoffset
,
7873 section_size_type fnsize
,
7874 const unsigned char* prelocs
,
7876 unsigned char* view
,
7877 section_size_type view_size
,
7879 std::string
* to
) const
7881 // 32-bit not supported.
7885 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
7886 prelocs
, reloc_count
, view
, view_size
,
7891 // The function always starts with
7892 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7893 // addis %r12,%r1,-allocate@ha
7894 // addi %r12,%r12,-allocate@l
7896 // but note that the addis or addi may be replaced with a nop
7898 unsigned char *entry
= view
+ fnoffset
;
7899 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7901 if ((insn
& 0xffff0000) == addis_2_12
)
7903 /* Skip ELFv2 global entry code. */
7905 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
7908 unsigned char *pinsn
= entry
;
7910 const uint32_t ld_private_ss
= 0xe80d8fc0;
7911 if (insn
== ld_private_ss
)
7913 int32_t allocate
= 0;
7917 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
7918 if ((insn
& 0xffff0000) == addis_12_1
)
7919 allocate
+= (insn
& 0xffff) << 16;
7920 else if ((insn
& 0xffff0000) == addi_12_1
7921 || (insn
& 0xffff0000) == addi_12_12
)
7922 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
7923 else if (insn
!= nop
)
7926 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
7928 int extra
= parameters
->options().split_stack_adjust_size();
7930 if (allocate
>= 0 || extra
< 0)
7932 object
->error(_("split-stack stack size overflow at "
7933 "section %u offset %0zx"),
7934 shndx
, static_cast<size_t>(fnoffset
));
7938 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
7939 if (insn
!= addis_12_1
)
7941 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7943 insn
= addi_12_12
| (allocate
& 0xffff);
7944 if (insn
!= addi_12_12
)
7946 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7952 insn
= addi_12_1
| (allocate
& 0xffff);
7953 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
7956 if (pinsn
!= entry
+ 12)
7957 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
7965 if (!object
->has_no_split_stack())
7966 object
->error(_("failed to match split-stack sequence at "
7967 "section %u offset %0zx"),
7968 shndx
, static_cast<size_t>(fnoffset
));
7972 // Scan relocations for a section.
7974 template<int size
, bool big_endian
>
7976 Target_powerpc
<size
, big_endian
>::scan_relocs(
7977 Symbol_table
* symtab
,
7979 Sized_relobj_file
<size
, big_endian
>* object
,
7980 unsigned int data_shndx
,
7981 unsigned int sh_type
,
7982 const unsigned char* prelocs
,
7984 Output_section
* output_section
,
7985 bool needs_special_offset_handling
,
7986 size_t local_symbol_count
,
7987 const unsigned char* plocal_symbols
)
7989 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7990 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7993 if (!this->plt_localentry0_init_
)
7995 bool plt_localentry0
= false;
7997 && this->abiversion() >= 2)
7999 if (parameters
->options().user_set_plt_localentry())
8000 plt_localentry0
= parameters
->options().plt_localentry();
8002 && symtab
->lookup("GLIBC_2.26", NULL
) == NULL
)
8003 gold_warning(_("--plt-localentry is especially dangerous without "
8004 "ld.so support to detect ABI violations"));
8006 this->plt_localentry0_
= plt_localentry0
;
8007 this->plt_localentry0_init_
= true;
8010 if (sh_type
== elfcpp::SHT_REL
)
8012 gold_error(_("%s: unsupported REL reloc section"),
8013 object
->name().c_str());
8017 gold::scan_relocs
<size
, big_endian
, Powerpc
, Scan
, Classify_reloc
>(
8026 needs_special_offset_handling
,
8031 // Functor class for processing the global symbol table.
8032 // Removes symbols defined on discarded opd entries.
8034 template<bool big_endian
>
8035 class Global_symbol_visitor_opd
8038 Global_symbol_visitor_opd()
8042 operator()(Sized_symbol
<64>* sym
)
8044 if (sym
->has_symtab_index()
8045 || sym
->source() != Symbol::FROM_OBJECT
8046 || !sym
->in_real_elf())
8049 if (sym
->object()->is_dynamic())
8052 Powerpc_relobj
<64, big_endian
>* symobj
8053 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
8054 if (symobj
->opd_shndx() == 0)
8058 unsigned int shndx
= sym
->shndx(&is_ordinary
);
8059 if (shndx
== symobj
->opd_shndx()
8060 && symobj
->get_opd_discard(sym
->value()))
8062 sym
->set_undefined();
8063 sym
->set_visibility(elfcpp::STV_DEFAULT
);
8064 sym
->set_is_defined_in_discarded_section();
8065 sym
->set_symtab_index(-1U);
8070 template<int size
, bool big_endian
>
8072 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
8074 Symbol_table
* symtab
)
8078 Output_data_save_res
<size
, big_endian
>* savres
8079 = new Output_data_save_res
<size
, big_endian
>(symtab
);
8080 this->savres_section_
= savres
;
8081 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8082 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
8083 savres
, ORDER_TEXT
, false);
8087 // Sort linker created .got section first (for the header), then input
8088 // sections belonging to files using small model code.
8090 template<bool big_endian
>
8091 class Sort_toc_sections
8095 operator()(const Output_section::Input_section
& is1
,
8096 const Output_section::Input_section
& is2
) const
8098 if (!is1
.is_input_section() && is2
.is_input_section())
8101 = (is1
.is_input_section()
8102 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
8103 ->has_small_toc_reloc()));
8105 = (is2
.is_input_section()
8106 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
8107 ->has_small_toc_reloc()));
8108 return small1
&& !small2
;
8112 // Finalize the sections.
8114 template<int size
, bool big_endian
>
8116 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
8118 const Input_objects
*,
8119 Symbol_table
* symtab
)
8121 if (parameters
->doing_static_link())
8123 // At least some versions of glibc elf-init.o have a strong
8124 // reference to __rela_iplt marker syms. A weak ref would be
8126 if (this->iplt_
!= NULL
)
8128 Reloc_section
* rel
= this->iplt_
->rel_plt();
8129 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
8130 Symbol_table::PREDEFINED
, rel
, 0, 0,
8131 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8132 elfcpp::STV_HIDDEN
, 0, false, true);
8133 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
8134 Symbol_table::PREDEFINED
, rel
, 0, 0,
8135 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8136 elfcpp::STV_HIDDEN
, 0, true, true);
8140 symtab
->define_as_constant("__rela_iplt_start", NULL
,
8141 Symbol_table::PREDEFINED
, 0, 0,
8142 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8143 elfcpp::STV_HIDDEN
, 0, true, false);
8144 symtab
->define_as_constant("__rela_iplt_end", NULL
,
8145 Symbol_table::PREDEFINED
, 0, 0,
8146 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
8147 elfcpp::STV_HIDDEN
, 0, true, false);
8153 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
8154 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
8156 if (!parameters
->options().relocatable())
8158 this->define_save_restore_funcs(layout
, symtab
);
8160 // Annoyingly, we need to make these sections now whether or
8161 // not we need them. If we delay until do_relax then we
8162 // need to mess with the relaxation machinery checkpointing.
8163 this->got_section(symtab
, layout
);
8164 this->make_brlt_section(layout
);
8166 if (parameters
->options().toc_sort())
8168 Output_section
* os
= this->got_
->output_section();
8169 if (os
!= NULL
&& os
->input_sections().size() > 1)
8170 std::stable_sort(os
->input_sections().begin(),
8171 os
->input_sections().end(),
8172 Sort_toc_sections
<big_endian
>());
8177 // Fill in some more dynamic tags.
8178 Output_data_dynamic
* odyn
= layout
->dynamic_data();
8181 const Reloc_section
* rel_plt
= (this->plt_
== NULL
8183 : this->plt_
->rel_plt());
8184 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
8185 this->rela_dyn_
, true, size
== 32);
8189 if (this->got_
!= NULL
)
8191 this->got_
->finalize_data_size();
8192 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
8193 this->got_
, this->got_
->g_o_t());
8195 if (this->has_tls_get_addr_opt_
)
8196 odyn
->add_constant(elfcpp::DT_PPC_OPT
, elfcpp::PPC_OPT_TLS
);
8200 if (this->glink_
!= NULL
)
8202 this->glink_
->finalize_data_size();
8203 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
8205 (this->glink_
->pltresolve_size()
8208 if (this->has_localentry0_
|| this->has_tls_get_addr_opt_
)
8209 odyn
->add_constant(elfcpp::DT_PPC64_OPT
,
8210 ((this->has_localentry0_
8211 ? elfcpp::PPC64_OPT_LOCALENTRY
: 0)
8212 | (this->has_tls_get_addr_opt_
8213 ? elfcpp::PPC64_OPT_TLS
: 0)));
8217 // Emit any relocs we saved in an attempt to avoid generating COPY
8219 if (this->copy_relocs_
.any_saved_relocs())
8220 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
8223 // Emit any saved relocs, and mark toc entries using any of these
8224 // relocs as not optimizable.
8226 template<int sh_type
, int size
, bool big_endian
>
8228 Powerpc_copy_relocs
<sh_type
, size
, big_endian
>::emit(
8229 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
)
8232 && parameters
->options().toc_optimize())
8234 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8235 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8236 p
!= this->entries_
.end();
8239 typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
&
8242 // If the symbol is no longer defined in a dynamic object,
8243 // then we emitted a COPY relocation. If it is still
8244 // dynamic then we'll need dynamic relocations and thus
8245 // can't optimize toc entries.
8246 if (entry
.sym_
->is_from_dynobj())
8248 Powerpc_relobj
<size
, big_endian
>* ppc_object
8249 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(entry
.relobj_
);
8250 if (entry
.shndx_
== ppc_object
->toc_shndx())
8251 ppc_object
->set_no_toc_opt(entry
.address_
);
8256 Copy_relocs
<sh_type
, size
, big_endian
>::emit(reloc_section
);
8259 // Return the value to use for a branch relocation.
8261 template<int size
, bool big_endian
>
8263 Target_powerpc
<size
, big_endian
>::symval_for_branch(
8264 const Symbol_table
* symtab
,
8265 const Sized_symbol
<size
>* gsym
,
8266 Powerpc_relobj
<size
, big_endian
>* object
,
8268 unsigned int *dest_shndx
)
8270 if (size
== 32 || this->abiversion() >= 2)
8274 // If the symbol is defined in an opd section, ie. is a function
8275 // descriptor, use the function descriptor code entry address
8276 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
8278 && (gsym
->source() != Symbol::FROM_OBJECT
8279 || gsym
->object()->is_dynamic()))
8282 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
8283 unsigned int shndx
= symobj
->opd_shndx();
8286 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
8287 if (opd_addr
== invalid_address
)
8289 opd_addr
+= symobj
->output_section_address(shndx
);
8290 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
8293 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
8294 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
8297 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
8298 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
8299 *dest_shndx
= folded
.second
;
8301 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
8302 if (sec_addr
== invalid_address
)
8305 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
8306 *value
= sec_addr
+ sec_off
;
8311 // Perform a relocation.
8313 template<int size
, bool big_endian
>
8315 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
8316 const Relocate_info
<size
, big_endian
>* relinfo
,
8318 Target_powerpc
* target
,
8321 const unsigned char* preloc
,
8322 const Sized_symbol
<size
>* gsym
,
8323 const Symbol_value
<size
>* psymval
,
8324 unsigned char* view
,
8326 section_size_type view_size
)
8331 if (target
->replace_tls_get_addr(gsym
))
8332 gsym
= static_cast<const Sized_symbol
<size
>*>(target
->tls_get_addr_opt());
8334 const elfcpp::Rela
<size
, big_endian
> rela(preloc
);
8335 unsigned int r_type
= elfcpp::elf_r_type
<size
>(rela
.get_r_info());
8336 switch (this->maybe_skip_tls_get_addr_call(target
, r_type
, gsym
))
8338 case Track_tls::NOT_EXPECTED
:
8339 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8340 _("__tls_get_addr call lacks marker reloc"));
8342 case Track_tls::EXPECTED
:
8343 // We have already complained.
8345 case Track_tls::SKIP
:
8347 case Track_tls::NORMAL
:
8351 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
8352 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
8353 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
8354 // Offset from start of insn to d-field reloc.
8355 const int d_offset
= big_endian
? 2 : 0;
8357 Powerpc_relobj
<size
, big_endian
>* const object
8358 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8360 bool has_stub_value
= false;
8361 bool localentry0
= false;
8362 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
8364 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
8365 : object
->local_has_plt_offset(r_sym
))
8366 && (!psymval
->is_ifunc_symbol()
8367 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
8371 && target
->abiversion() >= 2
8372 && !parameters
->options().output_is_position_independent()
8373 && !is_branch_reloc(r_type
))
8375 Address off
= target
->glink_section()->find_global_entry(gsym
);
8376 if (off
!= invalid_address
)
8378 value
= target
->glink_section()->global_entry_address() + off
;
8379 has_stub_value
= true;
8384 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
8385 if (target
->stub_tables().size() == 1)
8386 stub_table
= target
->stub_tables()[0];
8387 if (stub_table
== NULL
8390 && !parameters
->options().output_is_position_independent()
8391 && !is_branch_reloc(r_type
)))
8392 stub_table
= object
->stub_table(relinfo
->data_shndx
);
8393 if (stub_table
== NULL
)
8395 // This is a ref from a data section to an ifunc symbol,
8396 // or a non-branch reloc for which we always want to use
8397 // one set of stubs for resolving function addresses.
8398 if (target
->stub_tables().size() != 0)
8399 stub_table
= target
->stub_tables()[0];
8401 if (stub_table
!= NULL
)
8403 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
;
8405 ent
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
8406 rela
.get_r_addend());
8408 ent
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
8409 rela
.get_r_addend());
8412 value
= stub_table
->stub_address() + ent
->off_
;
8413 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
8414 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->reloc_shdr
);
8415 size_t reloc_count
= shdr
.get_sh_size() / reloc_size
;
8418 && relnum
+ 1 < reloc_count
)
8420 Reltype
next_rela(preloc
+ reloc_size
);
8421 if (elfcpp::elf_r_type
<size
>(next_rela
.get_r_info())
8422 == elfcpp::R_PPC64_TOCSAVE
8423 && next_rela
.get_r_offset() == rela
.get_r_offset() + 4)
8426 localentry0
= ent
->localentry0_
;
8427 has_stub_value
= true;
8431 // We don't care too much about bogus debug references to
8432 // non-local functions, but otherwise there had better be a plt
8433 // call stub or global entry stub as appropriate.
8434 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
8437 if (r_type
== elfcpp::R_POWERPC_GOT16
8438 || r_type
== elfcpp::R_POWERPC_GOT16_LO
8439 || r_type
== elfcpp::R_POWERPC_GOT16_HI
8440 || r_type
== elfcpp::R_POWERPC_GOT16_HA
8441 || r_type
== elfcpp::R_PPC64_GOT16_DS
8442 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
8446 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
8447 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
8451 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
8452 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
8454 value
-= target
->got_section()->got_base_offset(object
);
8456 else if (r_type
== elfcpp::R_PPC64_TOC
)
8458 value
= (target
->got_section()->output_section()->address()
8459 + object
->toc_base_offset());
8461 else if (gsym
!= NULL
8462 && (r_type
== elfcpp::R_POWERPC_REL24
8463 || r_type
== elfcpp::R_PPC_PLTREL24
)
8468 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
8469 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
8470 bool can_plt_call
= localentry0
|| target
->is_tls_get_addr_opt(gsym
);
8471 if (!can_plt_call
&& rela
.get_r_offset() + 8 <= view_size
)
8473 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
8474 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
8477 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
8479 elfcpp::Swap
<32, big_endian
>::
8480 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
8481 can_plt_call
= true;
8486 // If we don't have a branch and link followed by a nop,
8487 // we can't go via the plt because there is no place to
8488 // put a toc restoring instruction.
8489 // Unless we know we won't be returning.
8490 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
8491 can_plt_call
= true;
8495 // g++ as of 20130507 emits self-calls without a
8496 // following nop. This is arguably wrong since we have
8497 // conflicting information. On the one hand a global
8498 // symbol and on the other a local call sequence, but
8499 // don't error for this special case.
8500 // It isn't possible to cheaply verify we have exactly
8501 // such a call. Allow all calls to the same section.
8503 Address code
= value
;
8504 if (gsym
->source() == Symbol::FROM_OBJECT
8505 && gsym
->object() == object
)
8507 unsigned int dest_shndx
= 0;
8508 if (target
->abiversion() < 2)
8510 Address addend
= rela
.get_r_addend();
8511 code
= psymval
->value(object
, addend
);
8512 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8513 &code
, &dest_shndx
);
8516 if (dest_shndx
== 0)
8517 dest_shndx
= gsym
->shndx(&is_ordinary
);
8518 ok
= dest_shndx
== relinfo
->data_shndx
;
8522 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
8523 _("call lacks nop, can't restore toc; "
8524 "recompile with -fPIC"));
8530 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8531 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8532 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8533 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8535 // First instruction of a global dynamic sequence, arg setup insn.
8536 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8537 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8538 enum Got_type got_type
= GOT_TYPE_STANDARD
;
8539 if (tls_type
== tls::TLSOPT_NONE
)
8540 got_type
= GOT_TYPE_TLSGD
;
8541 else if (tls_type
== tls::TLSOPT_TO_IE
)
8542 got_type
= GOT_TYPE_TPREL
;
8543 if (got_type
!= GOT_TYPE_STANDARD
)
8547 gold_assert(gsym
->has_got_offset(got_type
));
8548 value
= gsym
->got_offset(got_type
);
8552 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
8553 value
= object
->local_got_offset(r_sym
, got_type
);
8555 value
-= target
->got_section()->got_base_offset(object
);
8557 if (tls_type
== tls::TLSOPT_TO_IE
)
8559 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8560 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8562 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8563 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8564 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
8566 insn
|= 32 << 26; // lwz
8568 insn
|= 58 << 26; // ld
8569 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8571 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8572 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8574 else if (tls_type
== tls::TLSOPT_TO_LE
)
8576 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8577 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8579 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8580 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8581 insn
&= (1 << 26) - (1 << 21); // extract rt
8586 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8587 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8588 value
= psymval
->value(object
, rela
.get_r_addend());
8592 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8594 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8595 r_type
= elfcpp::R_POWERPC_NONE
;
8599 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8600 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8601 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8602 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8604 // First instruction of a local dynamic sequence, arg setup insn.
8605 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8606 if (tls_type
== tls::TLSOPT_NONE
)
8608 value
= target
->tlsld_got_offset();
8609 value
-= target
->got_section()->got_base_offset(object
);
8613 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8614 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8615 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8617 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8618 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8619 insn
&= (1 << 26) - (1 << 21); // extract rt
8624 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8625 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8630 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8632 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8633 r_type
= elfcpp::R_POWERPC_NONE
;
8637 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
8638 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
8639 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
8640 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
8642 // Accesses relative to a local dynamic sequence address,
8643 // no optimisation here.
8646 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
8647 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
8651 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
8652 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
8654 value
-= target
->got_section()->got_base_offset(object
);
8656 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8657 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8658 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8659 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8661 // First instruction of initial exec sequence.
8662 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8663 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8664 if (tls_type
== tls::TLSOPT_NONE
)
8668 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
8669 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
8673 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
8674 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
8676 value
-= target
->got_section()->got_base_offset(object
);
8680 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
8681 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8682 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8684 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8685 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8686 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
8691 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8692 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8693 value
= psymval
->value(object
, rela
.get_r_addend());
8697 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8699 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8700 r_type
= elfcpp::R_POWERPC_NONE
;
8704 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8705 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8707 // Second instruction of a global dynamic sequence,
8708 // the __tls_get_addr call
8709 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8710 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8711 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
8712 if (tls_type
!= tls::TLSOPT_NONE
)
8714 if (tls_type
== tls::TLSOPT_TO_IE
)
8716 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8717 Insn insn
= add_3_3_13
;
8720 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8721 r_type
= elfcpp::R_POWERPC_NONE
;
8725 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8726 Insn insn
= addi_3_3
;
8727 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8728 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8730 value
= psymval
->value(object
, rela
.get_r_addend());
8732 this->skip_next_tls_get_addr_call();
8735 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8736 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8738 // Second instruction of a local dynamic sequence,
8739 // the __tls_get_addr call
8740 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
8741 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
8742 if (tls_type
== tls::TLSOPT_TO_LE
)
8744 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8745 Insn insn
= addi_3_3
;
8746 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8747 this->skip_next_tls_get_addr_call();
8748 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8753 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8755 // Second instruction of an initial exec sequence
8756 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8757 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
8758 if (tls_type
== tls::TLSOPT_TO_LE
)
8760 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8761 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8762 unsigned int reg
= size
== 32 ? 2 : 13;
8763 insn
= at_tls_transform(insn
, reg
);
8764 gold_assert(insn
!= 0);
8765 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8766 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8768 value
= psymval
->value(object
, rela
.get_r_addend());
8771 else if (!has_stub_value
)
8774 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
8775 addend
= rela
.get_r_addend();
8776 value
= psymval
->value(object
, addend
);
8777 if (size
== 64 && is_branch_reloc(r_type
))
8779 if (target
->abiversion() >= 2)
8782 value
+= object
->ppc64_local_entry_offset(gsym
);
8784 value
+= object
->ppc64_local_entry_offset(r_sym
);
8788 unsigned int dest_shndx
;
8789 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
8790 &value
, &dest_shndx
);
8793 Address max_branch_offset
= max_branch_delta(r_type
);
8794 if (max_branch_offset
!= 0
8795 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
8797 Stub_table
<size
, big_endian
>* stub_table
8798 = object
->stub_table(relinfo
->data_shndx
);
8799 if (stub_table
!= NULL
)
8801 Address off
= stub_table
->find_long_branch_entry(object
, value
);
8802 if (off
!= invalid_address
)
8804 value
= (stub_table
->stub_address() + stub_table
->plt_size()
8806 has_stub_value
= true;
8814 case elfcpp::R_PPC64_REL64
:
8815 case elfcpp::R_POWERPC_REL32
:
8816 case elfcpp::R_POWERPC_REL24
:
8817 case elfcpp::R_PPC_PLTREL24
:
8818 case elfcpp::R_PPC_LOCAL24PC
:
8819 case elfcpp::R_POWERPC_REL16
:
8820 case elfcpp::R_POWERPC_REL16_LO
:
8821 case elfcpp::R_POWERPC_REL16_HI
:
8822 case elfcpp::R_POWERPC_REL16_HA
:
8823 case elfcpp::R_POWERPC_REL16DX_HA
:
8824 case elfcpp::R_POWERPC_REL14
:
8825 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8826 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8830 case elfcpp::R_PPC64_TOC16
:
8831 case elfcpp::R_PPC64_TOC16_LO
:
8832 case elfcpp::R_PPC64_TOC16_HI
:
8833 case elfcpp::R_PPC64_TOC16_HA
:
8834 case elfcpp::R_PPC64_TOC16_DS
:
8835 case elfcpp::R_PPC64_TOC16_LO_DS
:
8836 // Subtract the TOC base address.
8837 value
-= (target
->got_section()->output_section()->address()
8838 + object
->toc_base_offset());
8841 case elfcpp::R_POWERPC_SECTOFF
:
8842 case elfcpp::R_POWERPC_SECTOFF_LO
:
8843 case elfcpp::R_POWERPC_SECTOFF_HI
:
8844 case elfcpp::R_POWERPC_SECTOFF_HA
:
8845 case elfcpp::R_PPC64_SECTOFF_DS
:
8846 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
8848 value
-= os
->address();
8851 case elfcpp::R_PPC64_TPREL16_DS
:
8852 case elfcpp::R_PPC64_TPREL16_LO_DS
:
8853 case elfcpp::R_PPC64_TPREL16_HIGH
:
8854 case elfcpp::R_PPC64_TPREL16_HIGHA
:
8856 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8859 case elfcpp::R_POWERPC_TPREL16
:
8860 case elfcpp::R_POWERPC_TPREL16_LO
:
8861 case elfcpp::R_POWERPC_TPREL16_HI
:
8862 case elfcpp::R_POWERPC_TPREL16_HA
:
8863 case elfcpp::R_POWERPC_TPREL
:
8864 case elfcpp::R_PPC64_TPREL16_HIGHER
:
8865 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
8866 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
8867 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
8868 // tls symbol values are relative to tls_segment()->vaddr()
8872 case elfcpp::R_PPC64_DTPREL16_DS
:
8873 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
8874 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
8875 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
8876 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
8877 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
8879 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8880 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8883 case elfcpp::R_POWERPC_DTPREL16
:
8884 case elfcpp::R_POWERPC_DTPREL16_LO
:
8885 case elfcpp::R_POWERPC_DTPREL16_HI
:
8886 case elfcpp::R_POWERPC_DTPREL16_HA
:
8887 case elfcpp::R_POWERPC_DTPREL
:
8888 case elfcpp::R_PPC64_DTPREL16_HIGH
:
8889 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
8890 // tls symbol values are relative to tls_segment()->vaddr()
8891 value
-= dtp_offset
;
8894 case elfcpp::R_PPC64_ADDR64_LOCAL
:
8896 value
+= object
->ppc64_local_entry_offset(gsym
);
8898 value
+= object
->ppc64_local_entry_offset(r_sym
);
8905 Insn branch_bit
= 0;
8908 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
8909 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
8910 branch_bit
= 1 << 21;
8912 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
8913 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
8915 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
8916 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8919 if (this->is_isa_v2
)
8921 // Set 'a' bit. This is 0b00010 in BO field for branch
8922 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8923 // for branch on CTR insns (BO == 1a00t or 1a01t).
8924 if ((insn
& (0x14 << 21)) == (0x04 << 21))
8926 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
8933 // Invert 'y' bit if not the default.
8934 if (static_cast<Signed_address
>(value
) < 0)
8937 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
8952 // Multi-instruction sequences that access the GOT/TOC can
8953 // be optimized, eg.
8954 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8955 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8957 // addis ra,r2,0; addi rb,ra,x@toc@l;
8958 // to nop; addi rb,r2,x@toc;
8959 // FIXME: the @got sequence shown above is not yet
8960 // optimized. Note that gcc as of 2017-01-07 doesn't use
8961 // the ELF @got relocs except for TLS, instead using the
8962 // PowerOpen variant of a compiler managed GOT (called TOC).
8963 // The PowerOpen TOC sequence equivalent to the first
8964 // example is optimized.
8965 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
8966 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
8967 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
8968 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
8969 case elfcpp::R_POWERPC_GOT16_HA
:
8970 case elfcpp::R_PPC64_TOC16_HA
:
8971 if (parameters
->options().toc_optimize())
8973 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
8974 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
8975 if (r_type
== elfcpp::R_PPC64_TOC16_HA
8976 && object
->make_toc_relative(target
, &value
))
8978 gold_assert((insn
& ((0x3f << 26) | 0x1f << 16))
8979 == ((15u << 26) | (2 << 16)));
8981 if (((insn
& ((0x3f << 26) | 0x1f << 16))
8982 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8983 && value
+ 0x8000 < 0x10000)
8985 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
8991 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
8992 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
8993 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
8994 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
8995 case elfcpp::R_POWERPC_GOT16_LO
:
8996 case elfcpp::R_PPC64_GOT16_LO_DS
:
8997 case elfcpp::R_PPC64_TOC16_LO
:
8998 case elfcpp::R_PPC64_TOC16_LO_DS
:
8999 if (parameters
->options().toc_optimize())
9001 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9002 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9003 bool changed
= false;
9004 if (r_type
== elfcpp::R_PPC64_TOC16_LO_DS
9005 && object
->make_toc_relative(target
, &value
))
9007 gold_assert ((insn
& (0x3f << 26)) == 58u << 26 /* ld */);
9008 insn
^= (14u << 26) ^ (58u << 26);
9009 r_type
= elfcpp::R_PPC64_TOC16_LO
;
9012 if (ok_lo_toc_insn(insn
, r_type
)
9013 && value
+ 0x8000 < 0x10000)
9015 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
9017 // Transform addic to addi when we change reg.
9018 insn
&= ~((0x3f << 26) | (0x1f << 16));
9019 insn
|= (14u << 26) | (2 << 16);
9023 insn
&= ~(0x1f << 16);
9029 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9033 case elfcpp::R_POWERPC_TPREL16_HA
:
9034 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9036 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9037 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9038 if ((insn
& ((0x3f << 26) | 0x1f << 16))
9039 != ((15u << 26) | ((size
== 32 ? 2 : 13) << 16)))
9043 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
9049 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9051 // R_PPC_TLSGD, R_PPC_TLSLD
9054 case elfcpp::R_POWERPC_TPREL16_LO
:
9055 if (parameters
->options().tls_optimize() && value
+ 0x8000 < 0x10000)
9057 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9058 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9059 insn
&= ~(0x1f << 16);
9060 insn
|= (size
== 32 ? 2 : 13) << 16;
9061 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
9065 case elfcpp::R_PPC64_ENTRY
:
9066 value
= (target
->got_section()->output_section()->address()
9067 + object
->toc_base_offset());
9068 if (value
+ 0x80008000 <= 0xffffffff
9069 && !parameters
->options().output_is_position_independent())
9071 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9072 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9073 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9075 if ((insn1
& ~0xfffc) == ld_2_12
9076 && insn2
== add_2_2_12
)
9078 insn1
= lis_2
+ ha(value
);
9079 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9080 insn2
= addi_2_2
+ l(value
);
9081 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9088 if (value
+ 0x80008000 <= 0xffffffff)
9090 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9091 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9092 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
+ 1);
9094 if ((insn1
& ~0xfffc) == ld_2_12
9095 && insn2
== add_2_2_12
)
9097 insn1
= addis_2_12
+ ha(value
);
9098 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn1
);
9099 insn2
= addi_2_2
+ l(value
);
9100 elfcpp::Swap
<32, big_endian
>::writeval(iview
+ 1, insn2
);
9107 case elfcpp::R_POWERPC_REL16_LO
:
9108 // If we are generating a non-PIC executable, edit
9109 // 0: addis 2,12,.TOC.-0b@ha
9110 // addi 2,2,.TOC.-0b@l
9111 // used by ELFv2 global entry points to set up r2, to
9114 // if .TOC. is in range. */
9115 if (value
+ address
- 4 + 0x80008000 <= 0xffffffff
9118 && target
->abiversion() >= 2
9119 && !parameters
->options().output_is_position_independent()
9120 && rela
.get_r_addend() == d_offset
+ 4
9122 && strcmp(gsym
->name(), ".TOC.") == 0)
9124 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9125 Reltype
prev_rela(preloc
- reloc_size
);
9126 if ((prev_rela
.get_r_info()
9127 == elfcpp::elf_r_info
<size
>(r_sym
,
9128 elfcpp::R_POWERPC_REL16_HA
))
9129 && prev_rela
.get_r_offset() + 4 == rela
.get_r_offset()
9130 && prev_rela
.get_r_addend() + 4 == rela
.get_r_addend())
9132 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9133 Insn insn1
= elfcpp::Swap
<32, big_endian
>::readval(iview
- 1);
9134 Insn insn2
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9136 if ((insn1
& 0xffff0000) == addis_2_12
9137 && (insn2
& 0xffff0000) == addi_2_2
)
9139 insn1
= lis_2
+ ha(value
+ address
- 4);
9140 elfcpp::Swap
<32, big_endian
>::writeval(iview
- 1, insn1
);
9141 insn2
= addi_2_2
+ l(value
+ address
- 4);
9142 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn2
);
9145 relinfo
->rr
->set_strategy(relnum
- 1,
9146 Relocatable_relocs::RELOC_SPECIAL
);
9147 relinfo
->rr
->set_strategy(relnum
,
9148 Relocatable_relocs::RELOC_SPECIAL
);
9158 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
9159 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
9162 case elfcpp::R_POWERPC_ADDR32
:
9163 case elfcpp::R_POWERPC_UADDR32
:
9165 overflow
= Reloc::CHECK_BITFIELD
;
9168 case elfcpp::R_POWERPC_REL32
:
9169 case elfcpp::R_POWERPC_REL16DX_HA
:
9171 overflow
= Reloc::CHECK_SIGNED
;
9174 case elfcpp::R_POWERPC_UADDR16
:
9175 overflow
= Reloc::CHECK_BITFIELD
;
9178 case elfcpp::R_POWERPC_ADDR16
:
9179 // We really should have three separate relocations,
9180 // one for 16-bit data, one for insns with 16-bit signed fields,
9181 // and one for insns with 16-bit unsigned fields.
9182 overflow
= Reloc::CHECK_BITFIELD
;
9183 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
9184 overflow
= Reloc::CHECK_LOW_INSN
;
9187 case elfcpp::R_POWERPC_ADDR16_HI
:
9188 case elfcpp::R_POWERPC_ADDR16_HA
:
9189 case elfcpp::R_POWERPC_GOT16_HI
:
9190 case elfcpp::R_POWERPC_GOT16_HA
:
9191 case elfcpp::R_POWERPC_PLT16_HI
:
9192 case elfcpp::R_POWERPC_PLT16_HA
:
9193 case elfcpp::R_POWERPC_SECTOFF_HI
:
9194 case elfcpp::R_POWERPC_SECTOFF_HA
:
9195 case elfcpp::R_PPC64_TOC16_HI
:
9196 case elfcpp::R_PPC64_TOC16_HA
:
9197 case elfcpp::R_PPC64_PLTGOT16_HI
:
9198 case elfcpp::R_PPC64_PLTGOT16_HA
:
9199 case elfcpp::R_POWERPC_TPREL16_HI
:
9200 case elfcpp::R_POWERPC_TPREL16_HA
:
9201 case elfcpp::R_POWERPC_DTPREL16_HI
:
9202 case elfcpp::R_POWERPC_DTPREL16_HA
:
9203 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9204 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9205 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9206 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9207 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9208 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9209 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9210 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9211 case elfcpp::R_POWERPC_REL16_HI
:
9212 case elfcpp::R_POWERPC_REL16_HA
:
9214 overflow
= Reloc::CHECK_HIGH_INSN
;
9217 case elfcpp::R_POWERPC_REL16
:
9218 case elfcpp::R_PPC64_TOC16
:
9219 case elfcpp::R_POWERPC_GOT16
:
9220 case elfcpp::R_POWERPC_SECTOFF
:
9221 case elfcpp::R_POWERPC_TPREL16
:
9222 case elfcpp::R_POWERPC_DTPREL16
:
9223 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9224 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9225 case elfcpp::R_POWERPC_GOT_TPREL16
:
9226 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9227 overflow
= Reloc::CHECK_LOW_INSN
;
9230 case elfcpp::R_POWERPC_ADDR24
:
9231 case elfcpp::R_POWERPC_ADDR14
:
9232 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9233 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9234 case elfcpp::R_PPC64_ADDR16_DS
:
9235 case elfcpp::R_POWERPC_REL24
:
9236 case elfcpp::R_PPC_PLTREL24
:
9237 case elfcpp::R_PPC_LOCAL24PC
:
9238 case elfcpp::R_PPC64_TPREL16_DS
:
9239 case elfcpp::R_PPC64_DTPREL16_DS
:
9240 case elfcpp::R_PPC64_TOC16_DS
:
9241 case elfcpp::R_PPC64_GOT16_DS
:
9242 case elfcpp::R_PPC64_SECTOFF_DS
:
9243 case elfcpp::R_POWERPC_REL14
:
9244 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9245 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9246 overflow
= Reloc::CHECK_SIGNED
;
9250 Insn
* iview
= reinterpret_cast<Insn
*>(view
- d_offset
);
9253 if (overflow
== Reloc::CHECK_LOW_INSN
9254 || overflow
== Reloc::CHECK_HIGH_INSN
)
9256 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9258 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
9259 overflow
= Reloc::CHECK_BITFIELD
;
9260 else if (overflow
== Reloc::CHECK_LOW_INSN
9261 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
9262 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
9263 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
9264 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
9265 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
9266 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
9267 overflow
= Reloc::CHECK_UNSIGNED
;
9269 overflow
= Reloc::CHECK_SIGNED
;
9272 bool maybe_dq_reloc
= false;
9273 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
9274 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
9277 case elfcpp::R_POWERPC_NONE
:
9278 case elfcpp::R_POWERPC_TLS
:
9279 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
9280 case elfcpp::R_POWERPC_GNU_VTENTRY
:
9283 case elfcpp::R_PPC64_ADDR64
:
9284 case elfcpp::R_PPC64_REL64
:
9285 case elfcpp::R_PPC64_TOC
:
9286 case elfcpp::R_PPC64_ADDR64_LOCAL
:
9287 Reloc::addr64(view
, value
);
9290 case elfcpp::R_POWERPC_TPREL
:
9291 case elfcpp::R_POWERPC_DTPREL
:
9293 Reloc::addr64(view
, value
);
9295 status
= Reloc::addr32(view
, value
, overflow
);
9298 case elfcpp::R_PPC64_UADDR64
:
9299 Reloc::addr64_u(view
, value
);
9302 case elfcpp::R_POWERPC_ADDR32
:
9303 status
= Reloc::addr32(view
, value
, overflow
);
9306 case elfcpp::R_POWERPC_REL32
:
9307 case elfcpp::R_POWERPC_UADDR32
:
9308 status
= Reloc::addr32_u(view
, value
, overflow
);
9311 case elfcpp::R_POWERPC_ADDR24
:
9312 case elfcpp::R_POWERPC_REL24
:
9313 case elfcpp::R_PPC_PLTREL24
:
9314 case elfcpp::R_PPC_LOCAL24PC
:
9315 status
= Reloc::addr24(view
, value
, overflow
);
9318 case elfcpp::R_POWERPC_GOT_DTPREL16
:
9319 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
9320 case elfcpp::R_POWERPC_GOT_TPREL16
:
9321 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
9324 // On ppc64 these are all ds form
9325 maybe_dq_reloc
= true;
9329 case elfcpp::R_POWERPC_ADDR16
:
9330 case elfcpp::R_POWERPC_REL16
:
9331 case elfcpp::R_PPC64_TOC16
:
9332 case elfcpp::R_POWERPC_GOT16
:
9333 case elfcpp::R_POWERPC_SECTOFF
:
9334 case elfcpp::R_POWERPC_TPREL16
:
9335 case elfcpp::R_POWERPC_DTPREL16
:
9336 case elfcpp::R_POWERPC_GOT_TLSGD16
:
9337 case elfcpp::R_POWERPC_GOT_TLSLD16
:
9338 case elfcpp::R_POWERPC_ADDR16_LO
:
9339 case elfcpp::R_POWERPC_REL16_LO
:
9340 case elfcpp::R_PPC64_TOC16_LO
:
9341 case elfcpp::R_POWERPC_GOT16_LO
:
9342 case elfcpp::R_POWERPC_SECTOFF_LO
:
9343 case elfcpp::R_POWERPC_TPREL16_LO
:
9344 case elfcpp::R_POWERPC_DTPREL16_LO
:
9345 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
9346 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
9348 status
= Reloc::addr16(view
, value
, overflow
);
9350 maybe_dq_reloc
= true;
9353 case elfcpp::R_POWERPC_UADDR16
:
9354 status
= Reloc::addr16_u(view
, value
, overflow
);
9357 case elfcpp::R_PPC64_ADDR16_HIGH
:
9358 case elfcpp::R_PPC64_TPREL16_HIGH
:
9359 case elfcpp::R_PPC64_DTPREL16_HIGH
:
9361 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
9364 case elfcpp::R_POWERPC_ADDR16_HI
:
9365 case elfcpp::R_POWERPC_REL16_HI
:
9366 case elfcpp::R_PPC64_TOC16_HI
:
9367 case elfcpp::R_POWERPC_GOT16_HI
:
9368 case elfcpp::R_POWERPC_SECTOFF_HI
:
9369 case elfcpp::R_POWERPC_TPREL16_HI
:
9370 case elfcpp::R_POWERPC_DTPREL16_HI
:
9371 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
9372 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
9373 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
9374 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
9375 Reloc::addr16_hi(view
, value
);
9378 case elfcpp::R_PPC64_ADDR16_HIGHA
:
9379 case elfcpp::R_PPC64_TPREL16_HIGHA
:
9380 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
9382 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
9385 case elfcpp::R_POWERPC_ADDR16_HA
:
9386 case elfcpp::R_POWERPC_REL16_HA
:
9387 case elfcpp::R_PPC64_TOC16_HA
:
9388 case elfcpp::R_POWERPC_GOT16_HA
:
9389 case elfcpp::R_POWERPC_SECTOFF_HA
:
9390 case elfcpp::R_POWERPC_TPREL16_HA
:
9391 case elfcpp::R_POWERPC_DTPREL16_HA
:
9392 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
9393 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
9394 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
9395 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
9396 Reloc::addr16_ha(view
, value
);
9399 case elfcpp::R_POWERPC_REL16DX_HA
:
9400 status
= Reloc::addr16dx_ha(view
, value
, overflow
);
9403 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
9405 // R_PPC_EMB_NADDR16_LO
9408 case elfcpp::R_PPC64_ADDR16_HIGHER
:
9409 case elfcpp::R_PPC64_TPREL16_HIGHER
:
9410 Reloc::addr16_hi2(view
, value
);
9413 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
9415 // R_PPC_EMB_NADDR16_HI
9418 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
9419 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
9420 Reloc::addr16_ha2(view
, value
);
9423 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
9425 // R_PPC_EMB_NADDR16_HA
9428 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
9429 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
9430 Reloc::addr16_hi3(view
, value
);
9433 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
9438 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
9439 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
9440 Reloc::addr16_ha3(view
, value
);
9443 case elfcpp::R_PPC64_DTPREL16_DS
:
9444 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
9446 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9449 case elfcpp::R_PPC64_TPREL16_DS
:
9450 case elfcpp::R_PPC64_TPREL16_LO_DS
:
9452 // R_PPC_TLSGD, R_PPC_TLSLD
9455 case elfcpp::R_PPC64_ADDR16_DS
:
9456 case elfcpp::R_PPC64_ADDR16_LO_DS
:
9457 case elfcpp::R_PPC64_TOC16_DS
:
9458 case elfcpp::R_PPC64_TOC16_LO_DS
:
9459 case elfcpp::R_PPC64_GOT16_DS
:
9460 case elfcpp::R_PPC64_GOT16_LO_DS
:
9461 case elfcpp::R_PPC64_SECTOFF_DS
:
9462 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
9463 maybe_dq_reloc
= true;
9466 case elfcpp::R_POWERPC_ADDR14
:
9467 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
9468 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
9469 case elfcpp::R_POWERPC_REL14
:
9470 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
9471 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
9472 status
= Reloc::addr14(view
, value
, overflow
);
9475 case elfcpp::R_POWERPC_COPY
:
9476 case elfcpp::R_POWERPC_GLOB_DAT
:
9477 case elfcpp::R_POWERPC_JMP_SLOT
:
9478 case elfcpp::R_POWERPC_RELATIVE
:
9479 case elfcpp::R_POWERPC_DTPMOD
:
9480 case elfcpp::R_PPC64_JMP_IREL
:
9481 case elfcpp::R_POWERPC_IRELATIVE
:
9482 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9483 _("unexpected reloc %u in object file"),
9487 case elfcpp::R_PPC64_TOCSAVE
:
9493 Symbol_location loc
;
9494 loc
.object
= relinfo
->object
;
9495 loc
.shndx
= relinfo
->data_shndx
;
9496 loc
.offset
= rela
.get_r_offset();
9497 Tocsave_loc::const_iterator p
= target
->tocsave_loc().find(loc
);
9498 if (p
!= target
->tocsave_loc().end())
9500 // If we've generated plt calls using this tocsave, then
9501 // the nop needs to be changed to save r2.
9502 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
9503 if (elfcpp::Swap
<32, big_endian
>::readval(iview
) == nop
)
9504 elfcpp::Swap
<32, big_endian
>::
9505 writeval(iview
, std_2_1
+ target
->stk_toc());
9510 case elfcpp::R_PPC_EMB_SDA2I16
:
9511 case elfcpp::R_PPC_EMB_SDA2REL
:
9514 // R_PPC64_TLSGD, R_PPC64_TLSLD
9517 case elfcpp::R_POWERPC_PLT32
:
9518 case elfcpp::R_POWERPC_PLTREL32
:
9519 case elfcpp::R_POWERPC_PLT16_LO
:
9520 case elfcpp::R_POWERPC_PLT16_HI
:
9521 case elfcpp::R_POWERPC_PLT16_HA
:
9522 case elfcpp::R_PPC_SDAREL16
:
9523 case elfcpp::R_POWERPC_ADDR30
:
9524 case elfcpp::R_PPC64_PLT64
:
9525 case elfcpp::R_PPC64_PLTREL64
:
9526 case elfcpp::R_PPC64_PLTGOT16
:
9527 case elfcpp::R_PPC64_PLTGOT16_LO
:
9528 case elfcpp::R_PPC64_PLTGOT16_HI
:
9529 case elfcpp::R_PPC64_PLTGOT16_HA
:
9530 case elfcpp::R_PPC64_PLT16_LO_DS
:
9531 case elfcpp::R_PPC64_PLTGOT16_DS
:
9532 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
9533 case elfcpp::R_PPC_EMB_RELSDA
:
9534 case elfcpp::R_PPC_TOC16
:
9537 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9538 _("unsupported reloc %u"),
9546 insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
9548 if ((insn
& (0x3f << 26)) == 56u << 26 /* lq */
9549 || ((insn
& (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9550 && (insn
& 3) == 1))
9551 status
= Reloc::addr16_dq(view
, value
, overflow
);
9553 || (insn
& (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9554 || (insn
& (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9555 || (insn
& (0x3f << 26)) == 57u << 26 /* lfdp */
9556 || (insn
& (0x3f << 26)) == 61u << 26 /* stfdp */)
9557 status
= Reloc::addr16_ds(view
, value
, overflow
);
9559 status
= Reloc::addr16(view
, value
, overflow
);
9562 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
9565 && gsym
->is_undefined()
9566 && is_branch_reloc(r_type
))))
9568 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
9569 _("relocation overflow"));
9571 gold_info(_("try relinking with a smaller --stub-group-size"));
9577 // Relocate section data.
9579 template<int size
, bool big_endian
>
9581 Target_powerpc
<size
, big_endian
>::relocate_section(
9582 const Relocate_info
<size
, big_endian
>* relinfo
,
9583 unsigned int sh_type
,
9584 const unsigned char* prelocs
,
9586 Output_section
* output_section
,
9587 bool needs_special_offset_handling
,
9588 unsigned char* view
,
9590 section_size_type view_size
,
9591 const Reloc_symbol_changes
* reloc_symbol_changes
)
9593 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
9594 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
9595 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
9596 Powerpc_comdat_behavior
;
9597 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9600 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9602 gold::relocate_section
<size
, big_endian
, Powerpc
, Powerpc_relocate
,
9603 Powerpc_comdat_behavior
, Classify_reloc
>(
9609 needs_special_offset_handling
,
9613 reloc_symbol_changes
);
9616 template<int size
, bool big_endian
>
9617 class Powerpc_scan_relocatable_reloc
9620 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9621 static const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9622 static const int sh_type
= elfcpp::SHT_RELA
;
9624 // Return the symbol referred to by the relocation.
9625 static inline unsigned int
9626 get_r_sym(const Reltype
* reloc
)
9627 { return elfcpp::elf_r_sym
<size
>(reloc
->get_r_info()); }
9629 // Return the type of the relocation.
9630 static inline unsigned int
9631 get_r_type(const Reltype
* reloc
)
9632 { return elfcpp::elf_r_type
<size
>(reloc
->get_r_info()); }
9634 // Return the strategy to use for a local symbol which is not a
9635 // section symbol, given the relocation type.
9636 inline Relocatable_relocs::Reloc_strategy
9637 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
9639 if (r_type
== 0 && r_sym
== 0)
9640 return Relocatable_relocs::RELOC_DISCARD
;
9641 return Relocatable_relocs::RELOC_COPY
;
9644 // Return the strategy to use for a local symbol which is a section
9645 // symbol, given the relocation type.
9646 inline Relocatable_relocs::Reloc_strategy
9647 local_section_strategy(unsigned int, Relobj
*)
9649 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
9652 // Return the strategy to use for a global symbol, given the
9653 // relocation type, the object, and the symbol index.
9654 inline Relocatable_relocs::Reloc_strategy
9655 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
9657 if (r_type
== elfcpp::R_PPC_PLTREL24
)
9658 return Relocatable_relocs::RELOC_SPECIAL
;
9659 return Relocatable_relocs::RELOC_COPY
;
9663 // Scan the relocs during a relocatable link.
9665 template<int size
, bool big_endian
>
9667 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
9668 Symbol_table
* symtab
,
9670 Sized_relobj_file
<size
, big_endian
>* object
,
9671 unsigned int data_shndx
,
9672 unsigned int sh_type
,
9673 const unsigned char* prelocs
,
9675 Output_section
* output_section
,
9676 bool needs_special_offset_handling
,
9677 size_t local_symbol_count
,
9678 const unsigned char* plocal_symbols
,
9679 Relocatable_relocs
* rr
)
9681 typedef Powerpc_scan_relocatable_reloc
<size
, big_endian
> Scan_strategy
;
9683 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9685 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_strategy
>(
9693 needs_special_offset_handling
,
9699 // Scan the relocs for --emit-relocs.
9701 template<int size
, bool big_endian
>
9703 Target_powerpc
<size
, big_endian
>::emit_relocs_scan(
9704 Symbol_table
* symtab
,
9706 Sized_relobj_file
<size
, big_endian
>* object
,
9707 unsigned int data_shndx
,
9708 unsigned int sh_type
,
9709 const unsigned char* prelocs
,
9711 Output_section
* output_section
,
9712 bool needs_special_offset_handling
,
9713 size_t local_symbol_count
,
9714 const unsigned char* plocal_syms
,
9715 Relocatable_relocs
* rr
)
9717 typedef gold::Default_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9719 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
9720 Emit_relocs_strategy
;
9722 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9724 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
9732 needs_special_offset_handling
,
9738 // Emit relocations for a section.
9739 // This is a modified version of the function by the same name in
9740 // target-reloc.h. Using relocate_special_relocatable for
9741 // R_PPC_PLTREL24 would require duplication of the entire body of the
9742 // loop, so we may as well duplicate the whole thing.
9744 template<int size
, bool big_endian
>
9746 Target_powerpc
<size
, big_endian
>::relocate_relocs(
9747 const Relocate_info
<size
, big_endian
>* relinfo
,
9748 unsigned int sh_type
,
9749 const unsigned char* prelocs
,
9751 Output_section
* output_section
,
9752 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
9754 Address view_address
,
9756 unsigned char* reloc_view
,
9757 section_size_type reloc_view_size
)
9759 gold_assert(sh_type
== elfcpp::SHT_RELA
);
9761 typedef typename
elfcpp::Rela
<size
, big_endian
> Reltype
;
9762 typedef typename
elfcpp::Rela_write
<size
, big_endian
> Reltype_write
;
9763 const int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
9764 // Offset from start of insn to d-field reloc.
9765 const int d_offset
= big_endian
? 2 : 0;
9767 Powerpc_relobj
<size
, big_endian
>* const object
9768 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
9769 const unsigned int local_count
= object
->local_symbol_count();
9770 unsigned int got2_shndx
= object
->got2_shndx();
9771 Address got2_addend
= 0;
9772 if (got2_shndx
!= 0)
9774 got2_addend
= object
->get_output_section_offset(got2_shndx
);
9775 gold_assert(got2_addend
!= invalid_address
);
9778 const bool relocatable
= parameters
->options().relocatable();
9780 unsigned char* pwrite
= reloc_view
;
9781 bool zap_next
= false;
9782 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
9784 Relocatable_relocs::Reloc_strategy strategy
= relinfo
->rr
->strategy(i
);
9785 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
9788 Reltype
reloc(prelocs
);
9789 Reltype_write
reloc_write(pwrite
);
9791 Address offset
= reloc
.get_r_offset();
9792 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
9793 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
9794 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
9795 const unsigned int orig_r_sym
= r_sym
;
9796 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
9797 = reloc
.get_r_addend();
9798 const Symbol
* gsym
= NULL
;
9802 // We could arrange to discard these and other relocs for
9803 // tls optimised sequences in the strategy methods, but for
9804 // now do as BFD ld does.
9805 r_type
= elfcpp::R_POWERPC_NONE
;
9809 // Get the new symbol index.
9810 Output_section
* os
= NULL
;
9811 if (r_sym
< local_count
)
9815 case Relocatable_relocs::RELOC_COPY
:
9816 case Relocatable_relocs::RELOC_SPECIAL
:
9819 r_sym
= object
->symtab_index(r_sym
);
9820 gold_assert(r_sym
!= -1U);
9824 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
9826 // We are adjusting a section symbol. We need to find
9827 // the symbol table index of the section symbol for
9828 // the output section corresponding to input section
9829 // in which this symbol is defined.
9830 gold_assert(r_sym
< local_count
);
9832 unsigned int shndx
=
9833 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
9834 gold_assert(is_ordinary
);
9835 os
= object
->output_section(shndx
);
9836 gold_assert(os
!= NULL
);
9837 gold_assert(os
->needs_symtab_index());
9838 r_sym
= os
->symtab_index();
9848 gsym
= object
->global_symbol(r_sym
);
9849 gold_assert(gsym
!= NULL
);
9850 if (gsym
->is_forwarder())
9851 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
9853 gold_assert(gsym
->has_symtab_index());
9854 r_sym
= gsym
->symtab_index();
9857 // Get the new offset--the location in the output section where
9858 // this relocation should be applied.
9859 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9860 offset
+= offset_in_output_section
;
9863 section_offset_type sot_offset
=
9864 convert_types
<section_offset_type
, Address
>(offset
);
9865 section_offset_type new_sot_offset
=
9866 output_section
->output_offset(object
, relinfo
->data_shndx
,
9868 gold_assert(new_sot_offset
!= -1);
9869 offset
= new_sot_offset
;
9872 // In an object file, r_offset is an offset within the section.
9873 // In an executable or dynamic object, generated by
9874 // --emit-relocs, r_offset is an absolute address.
9877 offset
+= view_address
;
9878 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
9879 offset
-= offset_in_output_section
;
9882 // Handle the reloc addend based on the strategy.
9883 if (strategy
== Relocatable_relocs::RELOC_COPY
)
9885 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
9887 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
9888 addend
= psymval
->value(object
, addend
);
9889 // In a relocatable link, the symbol value is relative to
9890 // the start of the output section. For a non-relocatable
9891 // link, we need to adjust the addend.
9894 gold_assert(os
!= NULL
);
9895 addend
-= os
->address();
9898 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
9902 if (addend
>= 32768)
9903 addend
+= got2_addend
;
9905 else if (r_type
== elfcpp::R_POWERPC_REL16_HA
)
9907 r_type
= elfcpp::R_POWERPC_ADDR16_HA
;
9910 else if (r_type
== elfcpp::R_POWERPC_REL16_LO
)
9912 r_type
= elfcpp::R_POWERPC_ADDR16_LO
;
9913 addend
-= d_offset
+ 4;
9921 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9922 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
9923 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
9924 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
9926 // First instruction of a global dynamic sequence,
9928 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9929 switch (this->optimize_tls_gd(final
))
9931 case tls::TLSOPT_TO_IE
:
9932 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
9933 - elfcpp::R_POWERPC_GOT_TLSGD16
);
9935 case tls::TLSOPT_TO_LE
:
9936 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
9937 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
9938 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9941 r_type
= elfcpp::R_POWERPC_NONE
;
9949 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9950 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
9951 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
9952 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
9954 // First instruction of a local dynamic sequence,
9956 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
9958 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
9959 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
9961 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9962 const Output_section
* os
= relinfo
->layout
->tls_segment()
9964 gold_assert(os
!= NULL
);
9965 gold_assert(os
->needs_symtab_index());
9966 r_sym
= os
->symtab_index();
9967 addend
= dtp_offset
;
9971 r_type
= elfcpp::R_POWERPC_NONE
;
9976 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9977 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
9978 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
9979 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
9981 // First instruction of initial exec sequence.
9982 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
9983 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
9985 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
9986 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
9987 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
9990 r_type
= elfcpp::R_POWERPC_NONE
;
9995 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
9996 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
9998 // Second instruction of a global dynamic sequence,
9999 // the __tls_get_addr call
10000 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10001 switch (this->optimize_tls_gd(final
))
10003 case tls::TLSOPT_TO_IE
:
10004 r_type
= elfcpp::R_POWERPC_NONE
;
10007 case tls::TLSOPT_TO_LE
:
10008 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10009 offset
+= d_offset
;
10016 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
10017 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
10019 // Second instruction of a local dynamic sequence,
10020 // the __tls_get_addr call
10021 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
10023 const Output_section
* os
= relinfo
->layout
->tls_segment()
10025 gold_assert(os
!= NULL
);
10026 gold_assert(os
->needs_symtab_index());
10027 r_sym
= os
->symtab_index();
10028 addend
= dtp_offset
;
10029 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10030 offset
+= d_offset
;
10034 else if (r_type
== elfcpp::R_POWERPC_TLS
)
10036 // Second instruction of an initial exec sequence
10037 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
10038 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
10040 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
10041 offset
+= d_offset
;
10046 reloc_write
.put_r_offset(offset
);
10047 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
10048 reloc_write
.put_r_addend(addend
);
10050 pwrite
+= reloc_size
;
10053 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
10054 == reloc_view_size
);
10057 // Return the value to use for a dynamic symbol which requires special
10058 // treatment. This is how we support equality comparisons of function
10059 // pointers across shared library boundaries, as described in the
10060 // processor specific ABI supplement.
10062 template<int size
, bool big_endian
>
10064 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
10068 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
10069 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10070 p
!= this->stub_tables_
.end();
10073 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10074 = (*p
)->find_plt_call_entry(gsym
);
10076 return (*p
)->stub_address() + ent
->off_
;
10079 else if (this->abiversion() >= 2)
10081 Address off
= this->glink_section()->find_global_entry(gsym
);
10082 if (off
!= invalid_address
)
10083 return this->glink_section()->global_entry_address() + off
;
10085 gold_unreachable();
10088 // Return the PLT address to use for a local symbol.
10089 template<int size
, bool big_endian
>
10091 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
10092 const Relobj
* object
,
10093 unsigned int symndx
) const
10097 const Sized_relobj
<size
, big_endian
>* relobj
10098 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
10099 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10100 p
!= this->stub_tables_
.end();
10103 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10104 = (*p
)->find_plt_call_entry(relobj
->sized_relobj(), symndx
);
10106 return (*p
)->stub_address() + ent
->off_
;
10109 gold_unreachable();
10112 // Return the PLT address to use for a global symbol.
10113 template<int size
, bool big_endian
>
10115 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
10116 const Symbol
* gsym
) const
10120 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
10121 p
!= this->stub_tables_
.end();
10124 const typename Stub_table
<size
, big_endian
>::Plt_stub_ent
* ent
10125 = (*p
)->find_plt_call_entry(gsym
);
10127 return (*p
)->stub_address() + ent
->off_
;
10130 else if (this->abiversion() >= 2)
10132 Address off
= this->glink_section()->find_global_entry(gsym
);
10133 if (off
!= invalid_address
)
10134 return this->glink_section()->global_entry_address() + off
;
10136 gold_unreachable();
10139 // Return the offset to use for the GOT_INDX'th got entry which is
10140 // for a local tls symbol specified by OBJECT, SYMNDX.
10141 template<int size
, bool big_endian
>
10143 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
10144 const Relobj
* object
,
10145 unsigned int symndx
,
10146 unsigned int got_indx
) const
10148 const Powerpc_relobj
<size
, big_endian
>* ppc_object
10149 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
10150 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
10152 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10153 got_type
<= GOT_TYPE_TPREL
;
10154 got_type
= Got_type(got_type
+ 1))
10155 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
10157 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
10158 if (got_type
== GOT_TYPE_TLSGD
)
10160 if (off
== got_indx
* (size
/ 8))
10162 if (got_type
== GOT_TYPE_TPREL
)
10165 return -dtp_offset
;
10169 gold_unreachable();
10172 // Return the offset to use for the GOT_INDX'th got entry which is
10173 // for global tls symbol GSYM.
10174 template<int size
, bool big_endian
>
10176 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
10178 unsigned int got_indx
) const
10180 if (gsym
->type() == elfcpp::STT_TLS
)
10182 for (Got_type got_type
= GOT_TYPE_TLSGD
;
10183 got_type
<= GOT_TYPE_TPREL
;
10184 got_type
= Got_type(got_type
+ 1))
10185 if (gsym
->has_got_offset(got_type
))
10187 unsigned int off
= gsym
->got_offset(got_type
);
10188 if (got_type
== GOT_TYPE_TLSGD
)
10190 if (off
== got_indx
* (size
/ 8))
10192 if (got_type
== GOT_TYPE_TPREL
)
10195 return -dtp_offset
;
10199 gold_unreachable();
10202 // The selector for powerpc object files.
10204 template<int size
, bool big_endian
>
10205 class Target_selector_powerpc
: public Target_selector
10208 Target_selector_powerpc()
10209 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
10212 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
10213 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
10215 ? (big_endian
? "elf64ppc" : "elf64lppc")
10216 : (big_endian
? "elf32ppc" : "elf32lppc")))
10220 do_instantiate_target()
10221 { return new Target_powerpc
<size
, big_endian
>(); }
10224 Target_selector_powerpc
<32, true> target_selector_ppc32
;
10225 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
10226 Target_selector_powerpc
<64, true> target_selector_ppc64
;
10227 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
10229 // Instantiate these constants for -O0
10230 template<int size
, bool big_endian
>
10231 const typename Output_data_glink
<size
, big_endian
>::Address
10232 Output_data_glink
<size
, big_endian
>::invalid_address
;
10233 template<int size
, bool big_endian
>
10234 const typename Stub_table
<size
, big_endian
>::Address
10235 Stub_table
<size
, big_endian
>::invalid_address
;
10236 template<int size
, bool big_endian
>
10237 const typename Target_powerpc
<size
, big_endian
>::Address
10238 Target_powerpc
<size
, big_endian
>::invalid_address
;
10240 } // End anonymous namespace.