1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2015 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
>
68 struct Stub_table_owner
70 Output_section
* output_section
;
71 const Output_section::Input_section
* owner
;
75 is_branch_reloc(unsigned int r_type
);
77 template<int size
, bool big_endian
>
78 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
81 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
82 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
83 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
85 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
86 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
87 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
88 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
89 opd_ent_(), access_from_map_(), has14_(), stub_table_index_(),
90 e_flags_(ehdr
.get_e_flags()), st_other_()
92 this->set_abiversion(0);
98 // Read the symbols then set up st_other vector.
100 do_read_symbols(Read_symbols_data
*);
102 // The .got2 section shndx.
107 return this->special_
;
112 // The .opd section shndx.
119 return this->special_
;
122 // Init OPD entry arrays.
124 init_opd(size_t opd_size
)
126 size_t count
= this->opd_ent_ndx(opd_size
);
127 this->opd_ent_
.resize(count
);
130 // Return section and offset of function entry for .opd + R_OFF.
132 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
134 size_t ndx
= this->opd_ent_ndx(r_off
);
135 gold_assert(ndx
< this->opd_ent_
.size());
136 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
138 *value
= this->opd_ent_
[ndx
].off
;
139 return this->opd_ent_
[ndx
].shndx
;
142 // Set section and offset of function entry for .opd + R_OFF.
144 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
146 size_t ndx
= this->opd_ent_ndx(r_off
);
147 gold_assert(ndx
< this->opd_ent_
.size());
148 this->opd_ent_
[ndx
].shndx
= shndx
;
149 this->opd_ent_
[ndx
].off
= value
;
152 // Return discard flag for .opd + R_OFF.
154 get_opd_discard(Address r_off
) const
156 size_t ndx
= this->opd_ent_ndx(r_off
);
157 gold_assert(ndx
< this->opd_ent_
.size());
158 return this->opd_ent_
[ndx
].discard
;
161 // Set discard flag for .opd + R_OFF.
163 set_opd_discard(Address r_off
)
165 size_t ndx
= this->opd_ent_ndx(r_off
);
166 gold_assert(ndx
< this->opd_ent_
.size());
167 this->opd_ent_
[ndx
].discard
= true;
172 { return this->opd_valid_
; }
176 { this->opd_valid_
= true; }
178 // Examine .rela.opd to build info about function entry points.
180 scan_opd_relocs(size_t reloc_count
,
181 const unsigned char* prelocs
,
182 const unsigned char* plocal_syms
);
184 // Perform the Sized_relobj_file method, then set up opd info from
187 do_read_relocs(Read_relocs_data
*);
190 do_find_special_sections(Read_symbols_data
* sd
);
192 // Adjust this local symbol value. Return false if the symbol
193 // should be discarded from the output file.
195 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
197 if (size
== 64 && this->opd_shndx() != 0)
200 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
202 if (this->get_opd_discard(lv
->input_value()))
210 { return &this->access_from_map_
; }
212 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
213 // section at DST_OFF.
215 add_reference(Relobj
* src_obj
,
216 unsigned int src_indx
,
217 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
219 Section_id
src_id(src_obj
, src_indx
);
220 this->access_from_map_
[dst_off
].insert(src_id
);
223 // Add a reference to the code section specified by the .opd entry
226 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
228 size_t ndx
= this->opd_ent_ndx(dst_off
);
229 if (ndx
>= this->opd_ent_
.size())
230 this->opd_ent_
.resize(ndx
+ 1);
231 this->opd_ent_
[ndx
].gc_mark
= true;
235 process_gc_mark(Symbol_table
* symtab
)
237 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
238 if (this->opd_ent_
[i
].gc_mark
)
240 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
241 symtab
->gc()->worklist().push_back(Section_id(this, shndx
));
245 // Return offset in output GOT section that this object will use
246 // as a TOC pointer. Won't be just a constant with multi-toc support.
248 toc_base_offset() const
252 set_has_small_toc_reloc()
253 { has_small_toc_reloc_
= true; }
256 has_small_toc_reloc() const
257 { return has_small_toc_reloc_
; }
260 set_has_14bit_branch(unsigned int shndx
)
262 if (shndx
>= this->has14_
.size())
263 this->has14_
.resize(shndx
+ 1);
264 this->has14_
[shndx
] = true;
268 has_14bit_branch(unsigned int shndx
) const
269 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
272 set_stub_table(unsigned int shndx
, unsigned int stub_index
)
274 if (shndx
>= this->stub_table_index_
.size())
275 this->stub_table_index_
.resize(shndx
+ 1);
276 this->stub_table_index_
[shndx
] = stub_index
;
279 Stub_table
<size
, big_endian
>*
280 stub_table(unsigned int shndx
)
282 if (shndx
< this->stub_table_index_
.size())
284 Target_powerpc
<size
, big_endian
>* target
285 = static_cast<Target_powerpc
<size
, big_endian
>*>(
286 parameters
->sized_target
<size
, big_endian
>());
287 unsigned int indx
= this->stub_table_index_
[shndx
];
288 gold_assert(indx
< target
->stub_tables().size());
289 return target
->stub_tables()[indx
];
297 this->stub_table_index_
.clear();
302 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
304 // Set ABI version for input and output
306 set_abiversion(int ver
);
309 ppc64_local_entry_offset(const Symbol
* sym
) const
310 { return elfcpp::ppc64_decode_local_entry(sym
->nonvis() >> 3); }
313 ppc64_local_entry_offset(unsigned int symndx
) const
314 { return elfcpp::ppc64_decode_local_entry(this->st_other_
[symndx
] >> 5); }
325 // Return index into opd_ent_ array for .opd entry at OFF.
326 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
327 // apart when the language doesn't use the last 8-byte word, the
328 // environment pointer. Thus dividing the entry section offset by
329 // 16 will give an index into opd_ent_ that works for either layout
330 // of .opd. (It leaves some elements of the vector unused when .opd
331 // entries are spaced 24 bytes apart, but we don't know the spacing
332 // until relocations are processed, and in any case it is possible
333 // for an object to have some entries spaced 16 bytes apart and
334 // others 24 bytes apart.)
336 opd_ent_ndx(size_t off
) const
339 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
340 unsigned int special_
;
342 // For 64-bit, whether this object uses small model relocs to access
344 bool has_small_toc_reloc_
;
346 // Set at the start of gc_process_relocs, when we know opd_ent_
347 // vector is valid. The flag could be made atomic and set in
348 // do_read_relocs with memory_order_release and then tested with
349 // memory_order_acquire, potentially resulting in fewer entries in
353 // The first 8-byte word of an OPD entry gives the address of the
354 // entry point of the function. Relocatable object files have a
355 // relocation on this word. The following vector records the
356 // section and offset specified by these relocations.
357 std::vector
<Opd_ent
> opd_ent_
;
359 // References made to this object's .opd section when running
360 // gc_process_relocs for another object, before the opd_ent_ vector
361 // is valid for this object.
362 Access_from access_from_map_
;
364 // Whether input section has a 14-bit branch reloc.
365 std::vector
<bool> has14_
;
367 // The stub table to use for a given input section.
368 std::vector
<unsigned int> stub_table_index_
;
371 elfcpp::Elf_Word e_flags_
;
373 // ELF st_other field for local symbols.
374 std::vector
<unsigned char> st_other_
;
377 template<int size
, bool big_endian
>
378 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
381 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
383 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
384 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
385 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
386 opd_shndx_(0), opd_ent_(), e_flags_(ehdr
.get_e_flags())
388 this->set_abiversion(0);
394 // Call Sized_dynobj::do_read_symbols to read the symbols then
395 // read .opd from a dynamic object, filling in opd_ent_ vector,
397 do_read_symbols(Read_symbols_data
*);
399 // The .opd section shndx.
403 return this->opd_shndx_
;
406 // The .opd section address.
410 return this->opd_address_
;
413 // Init OPD entry arrays.
415 init_opd(size_t opd_size
)
417 size_t count
= this->opd_ent_ndx(opd_size
);
418 this->opd_ent_
.resize(count
);
421 // Return section and offset of function entry for .opd + R_OFF.
423 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
425 size_t ndx
= this->opd_ent_ndx(r_off
);
426 gold_assert(ndx
< this->opd_ent_
.size());
427 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
429 *value
= this->opd_ent_
[ndx
].off
;
430 return this->opd_ent_
[ndx
].shndx
;
433 // Set section and offset of function entry for .opd + R_OFF.
435 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
437 size_t ndx
= this->opd_ent_ndx(r_off
);
438 gold_assert(ndx
< this->opd_ent_
.size());
439 this->opd_ent_
[ndx
].shndx
= shndx
;
440 this->opd_ent_
[ndx
].off
= value
;
445 { return this->e_flags_
& elfcpp::EF_PPC64_ABI
; }
447 // Set ABI version for input and output.
449 set_abiversion(int ver
);
452 // Used to specify extent of executable sections.
455 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
456 : start(start_
), len(len_
), shndx(shndx_
)
460 operator<(const Sec_info
& that
) const
461 { return this->start
< that
.start
; }
474 // Return index into opd_ent_ array for .opd entry at OFF.
476 opd_ent_ndx(size_t off
) const
479 // For 64-bit the .opd section shndx and address.
480 unsigned int opd_shndx_
;
481 Address opd_address_
;
483 // The first 8-byte word of an OPD entry gives the address of the
484 // entry point of the function. Records the section and offset
485 // corresponding to the address. Note that in dynamic objects,
486 // offset is *not* relative to the section.
487 std::vector
<Opd_ent
> opd_ent_
;
490 elfcpp::Elf_Word e_flags_
;
493 template<int size
, bool big_endian
>
494 class Target_powerpc
: public Sized_target
<size
, big_endian
>
498 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
499 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
500 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
501 static const Address invalid_address
= static_cast<Address
>(0) - 1;
502 // Offset of tp and dtp pointers from start of TLS block.
503 static const Address tp_offset
= 0x7000;
504 static const Address dtp_offset
= 0x8000;
507 : Sized_target
<size
, big_endian
>(&powerpc_info
),
508 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
509 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
510 tlsld_got_offset_(-1U),
511 stub_tables_(), branch_lookup_table_(), branch_info_(),
512 plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0),
517 // Process the relocations to determine unreferenced sections for
518 // garbage collection.
520 gc_process_relocs(Symbol_table
* symtab
,
522 Sized_relobj_file
<size
, big_endian
>* object
,
523 unsigned int data_shndx
,
524 unsigned int sh_type
,
525 const unsigned char* prelocs
,
527 Output_section
* output_section
,
528 bool needs_special_offset_handling
,
529 size_t local_symbol_count
,
530 const unsigned char* plocal_symbols
);
532 // Scan the relocations to look for symbol adjustments.
534 scan_relocs(Symbol_table
* symtab
,
536 Sized_relobj_file
<size
, big_endian
>* object
,
537 unsigned int data_shndx
,
538 unsigned int sh_type
,
539 const unsigned char* prelocs
,
541 Output_section
* output_section
,
542 bool needs_special_offset_handling
,
543 size_t local_symbol_count
,
544 const unsigned char* plocal_symbols
);
546 // Map input .toc section to output .got section.
548 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
550 if (size
== 64 && strcmp(name
, ".toc") == 0)
558 // Provide linker defined save/restore functions.
560 define_save_restore_funcs(Layout
*, Symbol_table
*);
562 // No stubs unless a final link.
565 { return !parameters
->options().relocatable(); }
568 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
571 do_plt_fde_location(const Output_data
*, unsigned char*,
572 uint64_t*, off_t
*) const;
574 // Stash info about branches, for stub generation.
576 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
577 unsigned int data_shndx
, Address r_offset
,
578 unsigned int r_type
, unsigned int r_sym
, Address addend
)
580 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
581 this->branch_info_
.push_back(info
);
582 if (r_type
== elfcpp::R_POWERPC_REL14
583 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
584 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
585 ppc_object
->set_has_14bit_branch(data_shndx
);
589 do_define_standard_symbols(Symbol_table
*, Layout
*);
591 // Finalize the sections.
593 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
595 // Return the value to use for a dynamic which requires special
598 do_dynsym_value(const Symbol
*) const;
600 // Return the PLT address to use for a local symbol.
602 do_plt_address_for_local(const Relobj
*, unsigned int) const;
604 // Return the PLT address to use for a global symbol.
606 do_plt_address_for_global(const Symbol
*) const;
608 // Return the offset to use for the GOT_INDX'th got entry which is
609 // for a local tls symbol specified by OBJECT, SYMNDX.
611 do_tls_offset_for_local(const Relobj
* object
,
613 unsigned int got_indx
) const;
615 // Return the offset to use for the GOT_INDX'th got entry which is
616 // for global tls symbol GSYM.
618 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
621 do_function_location(Symbol_location
*) const;
624 do_can_check_for_function_pointers() const
627 // Adjust -fsplit-stack code which calls non-split-stack code.
629 do_calls_non_split(Relobj
* object
, unsigned int shndx
,
630 section_offset_type fnoffset
, section_size_type fnsize
,
631 unsigned char* view
, section_size_type view_size
,
632 std::string
* from
, std::string
* to
) const;
634 // Relocate a section.
636 relocate_section(const Relocate_info
<size
, big_endian
>*,
637 unsigned int sh_type
,
638 const unsigned char* prelocs
,
640 Output_section
* output_section
,
641 bool needs_special_offset_handling
,
643 Address view_address
,
644 section_size_type view_size
,
645 const Reloc_symbol_changes
*);
647 // Scan the relocs during a relocatable link.
649 scan_relocatable_relocs(Symbol_table
* symtab
,
651 Sized_relobj_file
<size
, big_endian
>* object
,
652 unsigned int data_shndx
,
653 unsigned int sh_type
,
654 const unsigned char* prelocs
,
656 Output_section
* output_section
,
657 bool needs_special_offset_handling
,
658 size_t local_symbol_count
,
659 const unsigned char* plocal_symbols
,
660 Relocatable_relocs
*);
662 // Emit relocations for a section.
664 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
665 unsigned int sh_type
,
666 const unsigned char* prelocs
,
668 Output_section
* output_section
,
669 typename
elfcpp::Elf_types
<size
>::Elf_Off
670 offset_in_output_section
,
671 const Relocatable_relocs
*,
673 Address view_address
,
675 unsigned char* reloc_view
,
676 section_size_type reloc_view_size
);
678 // Return whether SYM is defined by the ABI.
680 do_is_defined_by_abi(const Symbol
* sym
) const
682 return strcmp(sym
->name(), "__tls_get_addr") == 0;
685 // Return the size of the GOT section.
689 gold_assert(this->got_
!= NULL
);
690 return this->got_
->data_size();
693 // Get the PLT section.
694 const Output_data_plt_powerpc
<size
, big_endian
>*
697 gold_assert(this->plt_
!= NULL
);
701 // Get the IPLT section.
702 const Output_data_plt_powerpc
<size
, big_endian
>*
705 gold_assert(this->iplt_
!= NULL
);
709 // Get the .glink section.
710 const Output_data_glink
<size
, big_endian
>*
711 glink_section() const
713 gold_assert(this->glink_
!= NULL
);
717 Output_data_glink
<size
, big_endian
>*
720 gold_assert(this->glink_
!= NULL
);
724 bool has_glink() const
725 { return this->glink_
!= NULL
; }
727 // Get the GOT section.
728 const Output_data_got_powerpc
<size
, big_endian
>*
731 gold_assert(this->got_
!= NULL
);
735 // Get the GOT section, creating it if necessary.
736 Output_data_got_powerpc
<size
, big_endian
>*
737 got_section(Symbol_table
*, Layout
*);
740 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
741 const elfcpp::Ehdr
<size
, big_endian
>&);
743 // Return the number of entries in the GOT.
745 got_entry_count() const
747 if (this->got_
== NULL
)
749 return this->got_size() / (size
/ 8);
752 // Return the number of entries in the PLT.
754 plt_entry_count() const;
756 // Return the offset of the first non-reserved PLT entry.
758 first_plt_entry_offset() const
762 if (this->abiversion() >= 2)
767 // Return the size of each PLT entry.
769 plt_entry_size() const
773 if (this->abiversion() >= 2)
778 // Add any special sections for this symbol to the gc work list.
779 // For powerpc64, this adds the code section of a function
782 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
784 // Handle target specific gc actions when adding a gc reference from
785 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
786 // and DST_OFF. For powerpc64, this adds a referenc to the code
787 // section of a function descriptor.
789 do_gc_add_reference(Symbol_table
* symtab
,
791 unsigned int src_shndx
,
793 unsigned int dst_shndx
,
794 Address dst_off
) const;
796 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
799 { return this->stub_tables_
; }
801 const Output_data_brlt_powerpc
<size
, big_endian
>*
803 { return this->brlt_section_
; }
806 add_branch_lookup_table(Address to
)
808 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
809 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
813 find_branch_lookup_table(Address to
)
815 typename
Branch_lookup_table::const_iterator p
816 = this->branch_lookup_table_
.find(to
);
817 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
821 write_branch_lookup_table(unsigned char *oview
)
823 for (typename
Branch_lookup_table::const_iterator p
824 = this->branch_lookup_table_
.begin();
825 p
!= this->branch_lookup_table_
.end();
828 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
833 plt_thread_safe() const
834 { return this->plt_thread_safe_
; }
838 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI
; }
841 set_abiversion (int ver
)
843 elfcpp::Elf_Word flags
= this->processor_specific_flags();
844 flags
&= ~elfcpp::EF_PPC64_ABI
;
845 flags
|= ver
& elfcpp::EF_PPC64_ABI
;
846 this->set_processor_specific_flags(flags
);
849 // Offset to to save stack slot
852 { return this->abiversion() < 2 ? 40 : 24; }
868 : tls_get_addr_(NOT_EXPECTED
),
869 relinfo_(NULL
), relnum_(0), r_offset_(0)
874 if (this->tls_get_addr_
!= NOT_EXPECTED
)
881 if (this->relinfo_
!= NULL
)
882 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
883 _("missing expected __tls_get_addr call"));
887 expect_tls_get_addr_call(
888 const Relocate_info
<size
, big_endian
>* relinfo
,
892 this->tls_get_addr_
= EXPECTED
;
893 this->relinfo_
= relinfo
;
894 this->relnum_
= relnum
;
895 this->r_offset_
= r_offset
;
899 expect_tls_get_addr_call()
900 { this->tls_get_addr_
= EXPECTED
; }
903 skip_next_tls_get_addr_call()
904 {this->tls_get_addr_
= SKIP
; }
907 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
909 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
910 || r_type
== elfcpp::R_PPC_PLTREL24
)
912 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
913 Tls_get_addr last_tls
= this->tls_get_addr_
;
914 this->tls_get_addr_
= NOT_EXPECTED
;
915 if (is_tls_call
&& last_tls
!= EXPECTED
)
917 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
926 // What we're up to regarding calls to __tls_get_addr.
927 // On powerpc, the branch and link insn making a call to
928 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
929 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
930 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
931 // The marker relocation always comes first, and has the same
932 // symbol as the reloc on the insn setting up the __tls_get_addr
933 // argument. This ties the arg setup insn with the call insn,
934 // allowing ld to safely optimize away the call. We check that
935 // every call to __tls_get_addr has a marker relocation, and that
936 // every marker relocation is on a call to __tls_get_addr.
937 Tls_get_addr tls_get_addr_
;
938 // Info about the last reloc for error message.
939 const Relocate_info
<size
, big_endian
>* relinfo_
;
944 // The class which scans relocations.
945 class Scan
: protected Track_tls
948 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
951 : Track_tls(), issued_non_pic_error_(false)
955 get_reference_flags(unsigned int r_type
, const Target_powerpc
* target
);
958 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
959 Sized_relobj_file
<size
, big_endian
>* object
,
960 unsigned int data_shndx
,
961 Output_section
* output_section
,
962 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
963 const elfcpp::Sym
<size
, big_endian
>& lsym
,
967 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
968 Sized_relobj_file
<size
, big_endian
>* object
,
969 unsigned int data_shndx
,
970 Output_section
* output_section
,
971 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
975 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
977 Sized_relobj_file
<size
, big_endian
>* relobj
,
980 const elfcpp::Rela
<size
, big_endian
>& ,
982 const elfcpp::Sym
<size
, big_endian
>&)
984 // PowerPC64 .opd is not folded, so any identical function text
985 // may be folded and we'll still keep function addresses distinct.
986 // That means no reloc is of concern here.
989 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
990 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
991 if (ppcobj
->abiversion() == 1)
994 // For 32-bit and ELFv2, conservatively assume anything but calls to
995 // function code might be taking the address of the function.
996 return !is_branch_reloc(r_type
);
1000 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1002 Sized_relobj_file
<size
, big_endian
>* relobj
,
1005 const elfcpp::Rela
<size
, big_endian
>& ,
1006 unsigned int r_type
,
1012 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1013 <Powerpc_relobj
<size
, big_endian
>*>(relobj
);
1014 if (ppcobj
->abiversion() == 1)
1017 return !is_branch_reloc(r_type
);
1021 reloc_needs_plt_for_ifunc(Target_powerpc
<size
, big_endian
>* target
,
1022 Sized_relobj_file
<size
, big_endian
>* object
,
1023 unsigned int r_type
, bool report_err
);
1027 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1028 unsigned int r_type
);
1031 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1032 unsigned int r_type
, Symbol
*);
1035 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
1036 Target_powerpc
* target
);
1039 check_non_pic(Relobj
*, unsigned int r_type
);
1041 // Whether we have issued an error about a non-PIC compilation.
1042 bool issued_non_pic_error_
;
1046 symval_for_branch(const Symbol_table
* symtab
,
1047 const Sized_symbol
<size
>* gsym
,
1048 Powerpc_relobj
<size
, big_endian
>* object
,
1049 Address
*value
, unsigned int *dest_shndx
);
1051 // The class which implements relocation.
1052 class Relocate
: protected Track_tls
1055 // Use 'at' branch hints when true, 'y' when false.
1056 // FIXME maybe: set this with an option.
1057 static const bool is_isa_v2
= true;
1063 // Do a relocation. Return false if the caller should not issue
1064 // any warnings about this relocation.
1066 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
1067 Output_section
*, size_t relnum
,
1068 const elfcpp::Rela
<size
, big_endian
>&,
1069 unsigned int r_type
, const Sized_symbol
<size
>*,
1070 const Symbol_value
<size
>*,
1072 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1076 class Relocate_comdat_behavior
1079 // Decide what the linker should do for relocations that refer to
1080 // discarded comdat sections.
1081 inline Comdat_behavior
1082 get(const char* name
)
1084 gold::Default_comdat_behavior default_behavior
;
1085 Comdat_behavior ret
= default_behavior
.get(name
);
1086 if (ret
== CB_WARNING
)
1089 && (strcmp(name
, ".fixup") == 0
1090 || strcmp(name
, ".got2") == 0))
1093 && (strcmp(name
, ".opd") == 0
1094 || strcmp(name
, ".toc") == 0
1095 || strcmp(name
, ".toc1") == 0))
1102 // A class which returns the size required for a relocation type,
1103 // used while scanning relocs during a relocatable link.
1104 class Relocatable_size_for_reloc
1108 get_size_for_reloc(unsigned int, Relobj
*)
1115 // Optimize the TLS relocation type based on what we know about the
1116 // symbol. IS_FINAL is true if the final address of this symbol is
1117 // known at link time.
1119 tls::Tls_optimization
1120 optimize_tls_gd(bool is_final
)
1122 // If we are generating a shared library, then we can't do anything
1124 if (parameters
->options().shared())
1125 return tls::TLSOPT_NONE
;
1128 return tls::TLSOPT_TO_IE
;
1129 return tls::TLSOPT_TO_LE
;
1132 tls::Tls_optimization
1135 if (parameters
->options().shared())
1136 return tls::TLSOPT_NONE
;
1138 return tls::TLSOPT_TO_LE
;
1141 tls::Tls_optimization
1142 optimize_tls_ie(bool is_final
)
1144 if (!is_final
|| parameters
->options().shared())
1145 return tls::TLSOPT_NONE
;
1147 return tls::TLSOPT_TO_LE
;
1152 make_glink_section(Layout
*);
1154 // Create the PLT section.
1156 make_plt_section(Symbol_table
*, Layout
*);
1159 make_iplt_section(Symbol_table
*, Layout
*);
1162 make_brlt_section(Layout
*);
1164 // Create a PLT entry for a global symbol.
1166 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1168 // Create a PLT entry for a local IFUNC symbol.
1170 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1171 Sized_relobj_file
<size
, big_endian
>*,
1175 // Create a GOT entry for local dynamic __tls_get_addr.
1177 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1178 Sized_relobj_file
<size
, big_endian
>* object
);
1181 tlsld_got_offset() const
1183 return this->tlsld_got_offset_
;
1186 // Get the dynamic reloc section, creating it if necessary.
1188 rela_dyn_section(Layout
*);
1190 // Similarly, but for ifunc symbols get the one for ifunc.
1192 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1194 // Copy a relocation against a global symbol.
1196 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1197 Sized_relobj_file
<size
, big_endian
>* object
,
1198 unsigned int shndx
, Output_section
* output_section
,
1199 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1201 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1202 symtab
->get_sized_symbol
<size
>(sym
),
1203 object
, shndx
, output_section
,
1204 reloc
, this->rela_dyn_section(layout
));
1207 // Look over all the input sections, deciding where to place stubs.
1209 group_sections(Layout
*, const Task
*, bool);
1211 // Sort output sections by address.
1212 struct Sort_sections
1215 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1216 { return sec1
->address() < sec2
->address(); }
1222 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1223 unsigned int data_shndx
,
1225 unsigned int r_type
,
1228 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1229 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1235 // If this branch needs a plt call stub, or a long branch stub, make one.
1237 make_stub(Stub_table
<size
, big_endian
>*,
1238 Stub_table
<size
, big_endian
>*,
1239 Symbol_table
*) const;
1242 // The branch location..
1243 Powerpc_relobj
<size
, big_endian
>* object_
;
1244 unsigned int shndx_
;
1246 // ..and the branch type and destination.
1247 unsigned int r_type_
;
1248 unsigned int r_sym_
;
1252 // Information about this specific target which we pass to the
1253 // general Target structure.
1254 static Target::Target_info powerpc_info
;
1256 // The types of GOT entries needed for this platform.
1257 // These values are exposed to the ABI in an incremental link.
1258 // Do not renumber existing values without changing the version
1259 // number of the .gnu_incremental_inputs section.
1263 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1264 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1265 GOT_TYPE_TPREL
// entry for @got@tprel
1269 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1270 // The PLT section. This is a container for a table of addresses,
1271 // and their relocations. Each address in the PLT has a dynamic
1272 // relocation (R_*_JMP_SLOT) and each address will have a
1273 // corresponding entry in .glink for lazy resolution of the PLT.
1274 // ppc32 initialises the PLT to point at the .glink entry, while
1275 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1276 // linker adds a stub that loads the PLT entry into ctr then
1277 // branches to ctr. There may be more than one stub for each PLT
1278 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1279 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1280 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1281 // The IPLT section. Like plt_, this is a container for a table of
1282 // addresses and their relocations, specifically for STT_GNU_IFUNC
1283 // functions that resolve locally (STT_GNU_IFUNC functions that
1284 // don't resolve locally go in PLT). Unlike plt_, these have no
1285 // entry in .glink for lazy resolution, and the relocation section
1286 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1287 // the relocation section may contain relocations against
1288 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1289 // relocation section will appear at the end of other dynamic
1290 // relocations, so that ld.so applies these relocations after other
1291 // dynamic relocations. In a static executable, the relocation
1292 // section is emitted and marked with __rela_iplt_start and
1293 // __rela_iplt_end symbols.
1294 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1295 // Section holding long branch destinations.
1296 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1297 // The .glink section.
1298 Output_data_glink
<size
, big_endian
>* glink_
;
1299 // The dynamic reloc section.
1300 Reloc_section
* rela_dyn_
;
1301 // Relocs saved to avoid a COPY reloc.
1302 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1303 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1304 unsigned int tlsld_got_offset_
;
1306 Stub_tables stub_tables_
;
1307 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1308 Branch_lookup_table branch_lookup_table_
;
1310 typedef std::vector
<Branch_info
> Branches
;
1311 Branches branch_info_
;
1313 bool plt_thread_safe_
;
1316 int relax_fail_count_
;
1317 int32_t stub_group_size_
;
1321 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1324 true, // is_big_endian
1325 elfcpp::EM_PPC
, // machine_code
1326 false, // has_make_symbol
1327 false, // has_resolve
1328 false, // has_code_fill
1329 true, // is_default_stack_executable
1330 false, // can_icf_inline_merge_sections
1332 "/usr/lib/ld.so.1", // dynamic_linker
1333 0x10000000, // default_text_segment_address
1334 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1335 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1336 false, // isolate_execinstr
1338 elfcpp::SHN_UNDEF
, // small_common_shndx
1339 elfcpp::SHN_UNDEF
, // large_common_shndx
1340 0, // small_common_section_flags
1341 0, // large_common_section_flags
1342 NULL
, // attributes_section
1343 NULL
, // attributes_vendor
1344 "_start" // entry_symbol_name
1348 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1351 false, // is_big_endian
1352 elfcpp::EM_PPC
, // machine_code
1353 false, // has_make_symbol
1354 false, // has_resolve
1355 false, // has_code_fill
1356 true, // is_default_stack_executable
1357 false, // can_icf_inline_merge_sections
1359 "/usr/lib/ld.so.1", // dynamic_linker
1360 0x10000000, // default_text_segment_address
1361 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1362 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1363 false, // isolate_execinstr
1365 elfcpp::SHN_UNDEF
, // small_common_shndx
1366 elfcpp::SHN_UNDEF
, // large_common_shndx
1367 0, // small_common_section_flags
1368 0, // large_common_section_flags
1369 NULL
, // attributes_section
1370 NULL
, // attributes_vendor
1371 "_start" // entry_symbol_name
1375 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1378 true, // is_big_endian
1379 elfcpp::EM_PPC64
, // machine_code
1380 false, // has_make_symbol
1381 false, // has_resolve
1382 false, // has_code_fill
1383 true, // is_default_stack_executable
1384 false, // can_icf_inline_merge_sections
1386 "/usr/lib/ld.so.1", // dynamic_linker
1387 0x10000000, // default_text_segment_address
1388 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1389 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1390 false, // isolate_execinstr
1392 elfcpp::SHN_UNDEF
, // small_common_shndx
1393 elfcpp::SHN_UNDEF
, // large_common_shndx
1394 0, // small_common_section_flags
1395 0, // large_common_section_flags
1396 NULL
, // attributes_section
1397 NULL
, // attributes_vendor
1398 "_start" // entry_symbol_name
1402 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1405 false, // is_big_endian
1406 elfcpp::EM_PPC64
, // machine_code
1407 false, // has_make_symbol
1408 false, // has_resolve
1409 false, // has_code_fill
1410 true, // is_default_stack_executable
1411 false, // can_icf_inline_merge_sections
1413 "/usr/lib/ld.so.1", // dynamic_linker
1414 0x10000000, // default_text_segment_address
1415 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1416 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1417 false, // isolate_execinstr
1419 elfcpp::SHN_UNDEF
, // small_common_shndx
1420 elfcpp::SHN_UNDEF
, // large_common_shndx
1421 0, // small_common_section_flags
1422 0, // large_common_section_flags
1423 NULL
, // attributes_section
1424 NULL
, // attributes_vendor
1425 "_start" // entry_symbol_name
1429 is_branch_reloc(unsigned int r_type
)
1431 return (r_type
== elfcpp::R_POWERPC_REL24
1432 || r_type
== elfcpp::R_PPC_PLTREL24
1433 || r_type
== elfcpp::R_PPC_LOCAL24PC
1434 || r_type
== elfcpp::R_POWERPC_REL14
1435 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1436 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1437 || r_type
== elfcpp::R_POWERPC_ADDR24
1438 || r_type
== elfcpp::R_POWERPC_ADDR14
1439 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1440 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1443 // If INSN is an opcode that may be used with an @tls operand, return
1444 // the transformed insn for TLS optimisation, otherwise return 0. If
1445 // REG is non-zero only match an insn with RB or RA equal to REG.
1447 at_tls_transform(uint32_t insn
, unsigned int reg
)
1449 if ((insn
& (0x3f << 26)) != 31 << 26)
1453 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1454 rtra
= insn
& ((1 << 26) - (1 << 16));
1455 else if (((insn
>> 16) & 0x1f) == reg
)
1456 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1460 if ((insn
& (0x3ff << 1)) == 266 << 1)
1463 else if ((insn
& (0x1f << 1)) == 23 << 1
1464 && ((insn
& (0x1f << 6)) < 14 << 6
1465 || ((insn
& (0x1f << 6)) >= 16 << 6
1466 && (insn
& (0x1f << 6)) < 24 << 6)))
1467 // load and store indexed -> dform
1468 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1469 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1470 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1471 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1472 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1474 insn
= (58 << 26) | 2;
1482 template<int size
, bool big_endian
>
1483 class Powerpc_relocate_functions
1503 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1504 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1506 template<int valsize
>
1508 has_overflow_signed(Address value
)
1510 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1511 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1512 limit
<<= ((valsize
- 1) >> 1);
1513 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1514 return value
+ limit
> (limit
<< 1) - 1;
1517 template<int valsize
>
1519 has_overflow_unsigned(Address value
)
1521 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1522 limit
<<= ((valsize
- 1) >> 1);
1523 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1524 return value
> (limit
<< 1) - 1;
1527 template<int valsize
>
1529 has_overflow_bitfield(Address value
)
1531 return (has_overflow_unsigned
<valsize
>(value
)
1532 && has_overflow_signed
<valsize
>(value
));
1535 template<int valsize
>
1536 static inline Status
1537 overflowed(Address value
, Overflow_check overflow
)
1539 if (overflow
== CHECK_SIGNED
)
1541 if (has_overflow_signed
<valsize
>(value
))
1542 return STATUS_OVERFLOW
;
1544 else if (overflow
== CHECK_UNSIGNED
)
1546 if (has_overflow_unsigned
<valsize
>(value
))
1547 return STATUS_OVERFLOW
;
1549 else if (overflow
== CHECK_BITFIELD
)
1551 if (has_overflow_bitfield
<valsize
>(value
))
1552 return STATUS_OVERFLOW
;
1557 // Do a simple RELA relocation
1558 template<int fieldsize
, int valsize
>
1559 static inline Status
1560 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1562 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1563 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1564 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, value
);
1565 return overflowed
<valsize
>(value
, overflow
);
1568 template<int fieldsize
, int valsize
>
1569 static inline Status
1570 rela(unsigned char* view
,
1571 unsigned int right_shift
,
1572 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1574 Overflow_check overflow
)
1576 typedef typename
elfcpp::Swap
<fieldsize
, big_endian
>::Valtype Valtype
;
1577 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1578 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(wv
);
1579 Valtype reloc
= value
>> right_shift
;
1582 elfcpp::Swap
<fieldsize
, big_endian
>::writeval(wv
, val
| reloc
);
1583 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1586 // Do a simple RELA relocation, unaligned.
1587 template<int fieldsize
, int valsize
>
1588 static inline Status
1589 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1591 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, value
);
1592 return overflowed
<valsize
>(value
, overflow
);
1595 template<int fieldsize
, int valsize
>
1596 static inline Status
1597 rela_ua(unsigned char* view
,
1598 unsigned int right_shift
,
1599 typename
elfcpp::Valtype_base
<fieldsize
>::Valtype dst_mask
,
1601 Overflow_check overflow
)
1603 typedef typename
elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::Valtype
1605 Valtype val
= elfcpp::Swap
<fieldsize
, big_endian
>::readval(view
);
1606 Valtype reloc
= value
>> right_shift
;
1609 elfcpp::Swap_unaligned
<fieldsize
, big_endian
>::writeval(view
, val
| reloc
);
1610 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1614 // R_PPC64_ADDR64: (Symbol + Addend)
1616 addr64(unsigned char* view
, Address value
)
1617 { This::template rela
<64,64>(view
, value
, CHECK_NONE
); }
1619 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1621 addr64_u(unsigned char* view
, Address value
)
1622 { This::template rela_ua
<64,64>(view
, value
, CHECK_NONE
); }
1624 // R_POWERPC_ADDR32: (Symbol + Addend)
1625 static inline Status
1626 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1627 { return This::template rela
<32,32>(view
, value
, overflow
); }
1629 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1630 static inline Status
1631 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1632 { return This::template rela_ua
<32,32>(view
, value
, overflow
); }
1634 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1635 static inline Status
1636 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1638 Status stat
= This::template rela
<32,26>(view
, 0, 0x03fffffc,
1640 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1641 stat
= STATUS_OVERFLOW
;
1645 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1646 static inline Status
1647 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1648 { return This::template rela
<16,16>(view
, value
, overflow
); }
1650 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1651 static inline Status
1652 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1653 { return This::template rela_ua
<16,16>(view
, value
, overflow
); }
1655 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1656 static inline Status
1657 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1659 Status stat
= This::template rela
<16,16>(view
, 0, 0xfffc, value
, overflow
);
1660 if ((value
& 3) != 0)
1661 stat
= STATUS_OVERFLOW
;
1665 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1667 addr16_hi(unsigned char* view
, Address value
)
1668 { This::template rela
<16,16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1670 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1672 addr16_ha(unsigned char* view
, Address value
)
1673 { This::addr16_hi(view
, value
+ 0x8000); }
1675 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1677 addr16_hi2(unsigned char* view
, Address value
)
1678 { This::template rela
<16,16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1680 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1682 addr16_ha2(unsigned char* view
, Address value
)
1683 { This::addr16_hi2(view
, value
+ 0x8000); }
1685 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1687 addr16_hi3(unsigned char* view
, Address value
)
1688 { This::template rela
<16,16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1690 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1692 addr16_ha3(unsigned char* view
, Address value
)
1693 { This::addr16_hi3(view
, value
+ 0x8000); }
1695 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1696 static inline Status
1697 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1699 Status stat
= This::template rela
<32,16>(view
, 0, 0xfffc, value
, overflow
);
1700 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1701 stat
= STATUS_OVERFLOW
;
1706 // Set ABI version for input and output.
1708 template<int size
, bool big_endian
>
1710 Powerpc_relobj
<size
, big_endian
>::set_abiversion(int ver
)
1712 this->e_flags_
|= ver
;
1713 if (this->abiversion() != 0)
1715 Target_powerpc
<size
, big_endian
>* target
=
1716 static_cast<Target_powerpc
<size
, big_endian
>*>(
1717 parameters
->sized_target
<size
, big_endian
>());
1718 if (target
->abiversion() == 0)
1719 target
->set_abiversion(this->abiversion());
1720 else if (target
->abiversion() != this->abiversion())
1721 gold_error(_("%s: ABI version %d is not compatible "
1722 "with ABI version %d output"),
1723 this->name().c_str(),
1724 this->abiversion(), target
->abiversion());
1729 // Stash away the index of .got2 or .opd in a relocatable object, if
1730 // such a section exists.
1732 template<int size
, bool big_endian
>
1734 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1735 Read_symbols_data
* sd
)
1737 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1738 const unsigned char* namesu
= sd
->section_names
->data();
1739 const char* names
= reinterpret_cast<const char*>(namesu
);
1740 section_size_type names_size
= sd
->section_names_size
;
1741 const unsigned char* s
;
1743 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1744 size
== 32 ? ".got2" : ".opd",
1745 names
, names_size
, NULL
);
1748 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1749 this->special_
= ndx
;
1752 if (this->abiversion() == 0)
1753 this->set_abiversion(1);
1754 else if (this->abiversion() > 1)
1755 gold_error(_("%s: .opd invalid in abiv%d"),
1756 this->name().c_str(), this->abiversion());
1759 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1762 // Examine .rela.opd to build info about function entry points.
1764 template<int size
, bool big_endian
>
1766 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1768 const unsigned char* prelocs
,
1769 const unsigned char* plocal_syms
)
1773 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1775 const int reloc_size
1776 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1777 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1778 Address expected_off
= 0;
1779 bool regular
= true;
1780 unsigned int opd_ent_size
= 0;
1782 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1784 Reltype
reloc(prelocs
);
1785 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1786 = reloc
.get_r_info();
1787 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1788 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1790 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1791 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1794 if (r_sym
< this->local_symbol_count())
1796 typename
elfcpp::Sym
<size
, big_endian
>
1797 lsym(plocal_syms
+ r_sym
* sym_size
);
1798 shndx
= lsym
.get_st_shndx();
1799 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1800 value
= lsym
.get_st_value();
1803 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1805 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1806 value
+ reloc
.get_r_addend());
1809 expected_off
= reloc
.get_r_offset();
1810 opd_ent_size
= expected_off
;
1812 else if (expected_off
!= reloc
.get_r_offset())
1814 expected_off
+= opd_ent_size
;
1816 else if (r_type
== elfcpp::R_PPC64_TOC
)
1818 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1823 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1824 this->name().c_str(), r_type
);
1828 if (reloc_count
<= 2)
1829 opd_ent_size
= this->section_size(this->opd_shndx());
1830 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1834 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1835 this->name().c_str());
1841 template<int size
, bool big_endian
>
1843 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1845 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1848 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1849 p
!= rd
->relocs
.end();
1852 if (p
->data_shndx
== this->opd_shndx())
1854 uint64_t opd_size
= this->section_size(this->opd_shndx());
1855 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1858 this->init_opd(opd_size
);
1859 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1860 rd
->local_symbols
->data());
1868 // Read the symbols then set up st_other vector.
1870 template<int size
, bool big_endian
>
1872 Powerpc_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1874 this->base_read_symbols(sd
);
1877 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1878 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1879 const unsigned int loccount
= this->do_local_symbol_count();
1882 this->st_other_
.resize(loccount
);
1883 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1884 off_t locsize
= loccount
* sym_size
;
1885 const unsigned int symtab_shndx
= this->symtab_shndx();
1886 const unsigned char *psymtab
= pshdrs
+ symtab_shndx
* shdr_size
;
1887 typename
elfcpp::Shdr
<size
, big_endian
> shdr(psymtab
);
1888 const unsigned char* psyms
= this->get_view(shdr
.get_sh_offset(),
1889 locsize
, true, false);
1891 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
1893 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
1894 unsigned char st_other
= sym
.get_st_other();
1895 this->st_other_
[i
] = st_other
;
1896 if ((st_other
& elfcpp::STO_PPC64_LOCAL_MASK
) != 0)
1898 if (this->abiversion() == 0)
1899 this->set_abiversion(2);
1900 else if (this->abiversion() < 2)
1901 gold_error(_("%s: local symbol %d has invalid st_other"
1902 " for ABI version 1"),
1903 this->name().c_str(), i
);
1910 template<int size
, bool big_endian
>
1912 Powerpc_dynobj
<size
, big_endian
>::set_abiversion(int ver
)
1914 this->e_flags_
|= ver
;
1915 if (this->abiversion() != 0)
1917 Target_powerpc
<size
, big_endian
>* target
=
1918 static_cast<Target_powerpc
<size
, big_endian
>*>(
1919 parameters
->sized_target
<size
, big_endian
>());
1920 if (target
->abiversion() == 0)
1921 target
->set_abiversion(this->abiversion());
1922 else if (target
->abiversion() != this->abiversion())
1923 gold_error(_("%s: ABI version %d is not compatible "
1924 "with ABI version %d output"),
1925 this->name().c_str(),
1926 this->abiversion(), target
->abiversion());
1931 // Call Sized_dynobj::base_read_symbols to read the symbols then
1932 // read .opd from a dynamic object, filling in opd_ent_ vector,
1934 template<int size
, bool big_endian
>
1936 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1938 this->base_read_symbols(sd
);
1941 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1942 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1943 const unsigned char* namesu
= sd
->section_names
->data();
1944 const char* names
= reinterpret_cast<const char*>(namesu
);
1945 const unsigned char* s
= NULL
;
1946 const unsigned char* opd
;
1947 section_size_type opd_size
;
1949 // Find and read .opd section.
1952 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1953 sd
->section_names_size
,
1958 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1959 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1960 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1962 if (this->abiversion() == 0)
1963 this->set_abiversion(1);
1964 else if (this->abiversion() > 1)
1965 gold_error(_("%s: .opd invalid in abiv%d"),
1966 this->name().c_str(), this->abiversion());
1968 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1969 this->opd_address_
= shdr
.get_sh_addr();
1970 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1971 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1977 // Build set of executable sections.
1978 // Using a set is probably overkill. There is likely to be only
1979 // a few executable sections, typically .init, .text and .fini,
1980 // and they are generally grouped together.
1981 typedef std::set
<Sec_info
> Exec_sections
;
1982 Exec_sections exec_sections
;
1984 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
1986 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1987 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1988 && ((shdr
.get_sh_flags()
1989 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1990 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1991 && shdr
.get_sh_size() != 0)
1993 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
1994 shdr
.get_sh_size(), i
));
1997 if (exec_sections
.empty())
2000 // Look over the OPD entries. This is complicated by the fact
2001 // that some binaries will use two-word entries while others
2002 // will use the standard three-word entries. In most cases
2003 // the third word (the environment pointer for languages like
2004 // Pascal) is unused and will be zero. If the third word is
2005 // used it should not be pointing into executable sections,
2007 this->init_opd(opd_size
);
2008 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
2010 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
2011 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
2012 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
2014 // Chances are that this is the third word of an OPD entry.
2016 typename
Exec_sections::const_iterator e
2017 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
2018 if (e
!= exec_sections
.begin())
2021 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
2023 // We have an address in an executable section.
2024 // VAL ought to be the function entry, set it up.
2025 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
2026 // Skip second word of OPD entry, the TOC pointer.
2030 // If we didn't match any executable sections, we likely
2031 // have a non-zero third word in the OPD entry.
2036 // Set up some symbols.
2038 template<int size
, bool big_endian
>
2040 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
2041 Symbol_table
* symtab
,
2046 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2047 // undefined when scanning relocs (and thus requires
2048 // non-relative dynamic relocs). The proper value will be
2050 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2051 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2053 Target_powerpc
<size
, big_endian
>* target
=
2054 static_cast<Target_powerpc
<size
, big_endian
>*>(
2055 parameters
->sized_target
<size
, big_endian
>());
2056 Output_data_got_powerpc
<size
, big_endian
>* got
2057 = target
->got_section(symtab
, layout
);
2058 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2059 Symbol_table::PREDEFINED
,
2063 elfcpp::STV_HIDDEN
, 0,
2067 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2068 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
2069 if (sdasym
!= NULL
&& sdasym
->is_undefined())
2071 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
2073 = layout
->add_output_section_data(".sdata", 0,
2075 | elfcpp::SHF_WRITE
,
2076 sdata
, ORDER_SMALL_DATA
, false);
2077 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2078 Symbol_table::PREDEFINED
,
2079 os
, 32768, 0, elfcpp::STT_OBJECT
,
2080 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2086 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2087 Symbol
*gotsym
= symtab
->lookup(".TOC.", NULL
);
2088 if (gotsym
!= NULL
&& gotsym
->is_undefined())
2090 Target_powerpc
<size
, big_endian
>* target
=
2091 static_cast<Target_powerpc
<size
, big_endian
>*>(
2092 parameters
->sized_target
<size
, big_endian
>());
2093 Output_data_got_powerpc
<size
, big_endian
>* got
2094 = target
->got_section(symtab
, layout
);
2095 symtab
->define_in_output_data(".TOC.", NULL
,
2096 Symbol_table::PREDEFINED
,
2100 elfcpp::STV_HIDDEN
, 0,
2106 // Set up PowerPC target specific relobj.
2108 template<int size
, bool big_endian
>
2110 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
2111 const std::string
& name
,
2112 Input_file
* input_file
,
2113 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2115 int et
= ehdr
.get_e_type();
2116 // ET_EXEC files are valid input for --just-symbols/-R,
2117 // and we treat them as relocatable objects.
2118 if (et
== elfcpp::ET_REL
2119 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
2121 Powerpc_relobj
<size
, big_endian
>* obj
=
2122 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2126 else if (et
== elfcpp::ET_DYN
)
2128 Powerpc_dynobj
<size
, big_endian
>* obj
=
2129 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2135 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
2140 template<int size
, bool big_endian
>
2141 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
2144 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
2145 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
2147 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
2148 : Output_data_got
<size
, big_endian
>(),
2149 symtab_(symtab
), layout_(layout
),
2150 header_ent_cnt_(size
== 32 ? 3 : 1),
2151 header_index_(size
== 32 ? 0x2000 : 0)
2154 // Override all the Output_data_got methods we use so as to first call
2157 add_global(Symbol
* gsym
, unsigned int got_type
)
2159 this->reserve_ent();
2160 return Output_data_got
<size
, big_endian
>::add_global(gsym
, got_type
);
2164 add_global_plt(Symbol
* gsym
, unsigned int got_type
)
2166 this->reserve_ent();
2167 return Output_data_got
<size
, big_endian
>::add_global_plt(gsym
, got_type
);
2171 add_global_tls(Symbol
* gsym
, unsigned int got_type
)
2172 { return this->add_global_plt(gsym
, got_type
); }
2175 add_global_with_rel(Symbol
* gsym
, unsigned int got_type
,
2176 Output_data_reloc_generic
* rel_dyn
, unsigned int r_type
)
2178 this->reserve_ent();
2179 Output_data_got
<size
, big_endian
>::
2180 add_global_with_rel(gsym
, got_type
, rel_dyn
, r_type
);
2184 add_global_pair_with_rel(Symbol
* gsym
, unsigned int got_type
,
2185 Output_data_reloc_generic
* rel_dyn
,
2186 unsigned int r_type_1
, unsigned int r_type_2
)
2188 this->reserve_ent(2);
2189 Output_data_got
<size
, big_endian
>::
2190 add_global_pair_with_rel(gsym
, got_type
, rel_dyn
, r_type_1
, r_type_2
);
2194 add_local(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2196 this->reserve_ent();
2197 return Output_data_got
<size
, big_endian
>::add_local(object
, sym_index
,
2202 add_local_plt(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2204 this->reserve_ent();
2205 return Output_data_got
<size
, big_endian
>::add_local_plt(object
, sym_index
,
2210 add_local_tls(Relobj
* object
, unsigned int sym_index
, unsigned int got_type
)
2211 { return this->add_local_plt(object
, sym_index
, got_type
); }
2214 add_local_tls_pair(Relobj
* object
, unsigned int sym_index
,
2215 unsigned int got_type
,
2216 Output_data_reloc_generic
* rel_dyn
,
2217 unsigned int r_type
)
2219 this->reserve_ent(2);
2220 Output_data_got
<size
, big_endian
>::
2221 add_local_tls_pair(object
, sym_index
, got_type
, rel_dyn
, r_type
);
2225 add_constant(Valtype constant
)
2227 this->reserve_ent();
2228 return Output_data_got
<size
, big_endian
>::add_constant(constant
);
2232 add_constant_pair(Valtype c1
, Valtype c2
)
2234 this->reserve_ent(2);
2235 return Output_data_got
<size
, big_endian
>::add_constant_pair(c1
, c2
);
2238 // Offset of _GLOBAL_OFFSET_TABLE_.
2242 return this->got_offset(this->header_index_
);
2245 // Offset of base used to access the GOT/TOC.
2246 // The got/toc pointer reg will be set to this value.
2248 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2251 return this->g_o_t();
2253 return (this->output_section()->address()
2254 + object
->toc_base_offset()
2258 // Ensure our GOT has a header.
2260 set_final_data_size()
2262 if (this->header_ent_cnt_
!= 0)
2263 this->make_header();
2264 Output_data_got
<size
, big_endian
>::set_final_data_size();
2267 // First word of GOT header needs some values that are not
2268 // handled by Output_data_got so poke them in here.
2269 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2271 do_write(Output_file
* of
)
2274 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2275 val
= this->layout_
->dynamic_section()->address();
2277 val
= this->output_section()->address() + 0x8000;
2278 this->replace_constant(this->header_index_
, val
);
2279 Output_data_got
<size
, big_endian
>::do_write(of
);
2284 reserve_ent(unsigned int cnt
= 1)
2286 if (this->header_ent_cnt_
== 0)
2288 if (this->num_entries() + cnt
> this->header_index_
)
2289 this->make_header();
2295 this->header_ent_cnt_
= 0;
2296 this->header_index_
= this->num_entries();
2299 Output_data_got
<size
, big_endian
>::add_constant(0);
2300 Output_data_got
<size
, big_endian
>::add_constant(0);
2301 Output_data_got
<size
, big_endian
>::add_constant(0);
2303 // Define _GLOBAL_OFFSET_TABLE_ at the header
2304 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2307 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2308 sym
->set_value(this->g_o_t());
2311 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2312 Symbol_table::PREDEFINED
,
2313 this, this->g_o_t(), 0,
2316 elfcpp::STV_HIDDEN
, 0,
2320 Output_data_got
<size
, big_endian
>::add_constant(0);
2323 // Stashed pointers.
2324 Symbol_table
* symtab_
;
2328 unsigned int header_ent_cnt_
;
2329 // GOT header index.
2330 unsigned int header_index_
;
2333 // Get the GOT section, creating it if necessary.
2335 template<int size
, bool big_endian
>
2336 Output_data_got_powerpc
<size
, big_endian
>*
2337 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2340 if (this->got_
== NULL
)
2342 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2345 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2347 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2348 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2349 this->got_
, ORDER_DATA
, false);
2355 // Get the dynamic reloc section, creating it if necessary.
2357 template<int size
, bool big_endian
>
2358 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2359 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2361 if (this->rela_dyn_
== NULL
)
2363 gold_assert(layout
!= NULL
);
2364 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2365 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2366 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2367 ORDER_DYNAMIC_RELOCS
, false);
2369 return this->rela_dyn_
;
2372 // Similarly, but for ifunc symbols get the one for ifunc.
2374 template<int size
, bool big_endian
>
2375 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2376 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2381 return this->rela_dyn_section(layout
);
2383 if (this->iplt_
== NULL
)
2384 this->make_iplt_section(symtab
, layout
);
2385 return this->iplt_
->rel_plt();
2391 // Determine the stub group size. The group size is the absolute
2392 // value of the parameter --stub-group-size. If --stub-group-size
2393 // is passed a negative value, we restrict stubs to be always before
2394 // the stubbed branches.
2395 Stub_control(int32_t size
, bool no_size_errors
)
2396 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2397 stub14_group_size_(abs(size
) >> 10),
2398 stubs_always_before_branch_(size
< 0),
2399 suppress_size_errors_(no_size_errors
),
2400 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2404 // Return true iff input section can be handled by current stub
2407 can_add_to_stub_group(Output_section
* o
,
2408 const Output_section::Input_section
* i
,
2411 const Output_section::Input_section
*
2417 { return output_section_
; }
2420 set_output_and_owner(Output_section
* o
,
2421 const Output_section::Input_section
* i
)
2423 this->output_section_
= o
;
2431 FINDING_STUB_SECTION
,
2436 uint32_t stub_group_size_
;
2437 uint32_t stub14_group_size_
;
2438 bool stubs_always_before_branch_
;
2439 bool suppress_size_errors_
;
2440 uint64_t group_end_addr_
;
2441 const Output_section::Input_section
* owner_
;
2442 Output_section
* output_section_
;
2445 // Return true iff input section can be handled by current stub
2449 Stub_control::can_add_to_stub_group(Output_section
* o
,
2450 const Output_section::Input_section
* i
,
2454 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2455 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2457 uint64_t start_addr
= o
->address();
2460 // .init and .fini sections are pasted together to form a single
2461 // function. We can't be adding stubs in the middle of the function.
2462 this_size
= o
->data_size();
2465 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2466 this_size
= i
->data_size();
2468 uint64_t end_addr
= start_addr
+ this_size
;
2469 bool toobig
= this_size
> group_size
;
2471 if (toobig
&& !this->suppress_size_errors_
)
2472 gold_warning(_("%s:%s exceeds group size"),
2473 i
->relobj()->name().c_str(),
2474 i
->relobj()->section_name(i
->shndx()).c_str());
2476 if (this->state_
!= HAS_STUB_SECTION
2477 && (!whole_sec
|| this->output_section_
!= o
)
2478 && (this->state_
== NO_GROUP
2479 || this->group_end_addr_
- end_addr
< group_size
))
2482 this->output_section_
= o
;
2485 if (this->state_
== NO_GROUP
)
2487 this->state_
= FINDING_STUB_SECTION
;
2488 this->group_end_addr_
= end_addr
;
2490 else if (this->group_end_addr_
- start_addr
< group_size
)
2492 // Adding this section would make the group larger than GROUP_SIZE.
2493 else if (this->state_
== FINDING_STUB_SECTION
2494 && !this->stubs_always_before_branch_
2497 // But wait, there's more! Input sections up to GROUP_SIZE
2498 // bytes before the stub table can be handled by it too.
2499 this->state_
= HAS_STUB_SECTION
;
2500 this->group_end_addr_
= end_addr
;
2504 this->state_
= NO_GROUP
;
2510 // Look over all the input sections, deciding where to place stubs.
2512 template<int size
, bool big_endian
>
2514 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2516 bool no_size_errors
)
2518 Stub_control
stub_control(this->stub_group_size_
, no_size_errors
);
2520 // Group input sections and insert stub table
2521 Stub_table_owner
* table_owner
= NULL
;
2522 std::vector
<Stub_table_owner
*> tables
;
2523 Layout::Section_list section_list
;
2524 layout
->get_executable_sections(§ion_list
);
2525 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2526 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2527 o
!= section_list
.rend();
2530 typedef Output_section::Input_section_list Input_section_list
;
2531 for (Input_section_list::const_reverse_iterator i
2532 = (*o
)->input_sections().rbegin();
2533 i
!= (*o
)->input_sections().rend();
2536 if (i
->is_input_section()
2537 || i
->is_relaxed_input_section())
2539 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2540 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2541 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2542 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2544 table_owner
->output_section
= stub_control
.output_section();
2545 table_owner
->owner
= stub_control
.owner();
2546 stub_control
.set_output_and_owner(*o
, &*i
);
2549 if (table_owner
== NULL
)
2551 table_owner
= new Stub_table_owner
;
2552 tables
.push_back(table_owner
);
2554 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2558 if (table_owner
!= NULL
)
2560 const Output_section::Input_section
* i
= stub_control
.owner();
2562 if (tables
.size() >= 2 && tables
[tables
.size() - 2]->owner
== i
)
2564 // Corner case. A new stub group was made for the first
2565 // section (last one looked at here) for some reason, but
2566 // the first section is already being used as the owner for
2567 // a stub table for following sections. Force it into that
2571 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2572 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2573 ppcobj
->set_stub_table(i
->shndx(), tables
.size() - 1);
2577 table_owner
->output_section
= stub_control
.output_section();
2578 table_owner
->owner
= i
;
2581 for (typename
std::vector
<Stub_table_owner
*>::iterator t
= tables
.begin();
2585 Stub_table
<size
, big_endian
>* stub_table
;
2587 if ((*t
)->owner
->is_input_section())
2588 stub_table
= new Stub_table
<size
, big_endian
>(this,
2589 (*t
)->output_section
,
2591 else if ((*t
)->owner
->is_relaxed_input_section())
2592 stub_table
= static_cast<Stub_table
<size
, big_endian
>*>(
2593 (*t
)->owner
->relaxed_input_section());
2596 this->stub_tables_
.push_back(stub_table
);
2601 static unsigned long
2602 max_branch_delta (unsigned int r_type
)
2604 if (r_type
== elfcpp::R_POWERPC_REL14
2605 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
2606 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2608 if (r_type
== elfcpp::R_POWERPC_REL24
2609 || r_type
== elfcpp::R_PPC_PLTREL24
2610 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
2615 // If this branch needs a plt call stub, or a long branch stub, make one.
2617 template<int size
, bool big_endian
>
2619 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2620 Stub_table
<size
, big_endian
>* stub_table
,
2621 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2622 Symbol_table
* symtab
) const
2624 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2625 if (sym
!= NULL
&& sym
->is_forwarder())
2626 sym
= symtab
->resolve_forwards(sym
);
2627 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2628 Target_powerpc
<size
, big_endian
>* target
=
2629 static_cast<Target_powerpc
<size
, big_endian
>*>(
2630 parameters
->sized_target
<size
, big_endian
>());
2632 ? gsym
->use_plt_offset(Scan::get_reference_flags(this->r_type_
, target
))
2633 : this->object_
->local_has_plt_offset(this->r_sym_
))
2637 && target
->abiversion() >= 2
2638 && !parameters
->options().output_is_position_independent()
2639 && !is_branch_reloc(this->r_type_
))
2640 target
->glink_section()->add_global_entry(gsym
);
2643 if (stub_table
== NULL
)
2644 stub_table
= this->object_
->stub_table(this->shndx_
);
2645 if (stub_table
== NULL
)
2647 // This is a ref from a data section to an ifunc symbol.
2648 stub_table
= ifunc_stub_table
;
2650 gold_assert(stub_table
!= NULL
);
2651 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2652 if (from
!= invalid_address
)
2653 from
+= (this->object_
->output_section(this->shndx_
)->address()
2656 return stub_table
->add_plt_call_entry(from
,
2657 this->object_
, gsym
,
2658 this->r_type_
, this->addend_
);
2660 return stub_table
->add_plt_call_entry(from
,
2661 this->object_
, this->r_sym_
,
2662 this->r_type_
, this->addend_
);
2667 Address max_branch_offset
= max_branch_delta(this->r_type_
);
2668 if (max_branch_offset
== 0)
2670 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2671 gold_assert(from
!= invalid_address
);
2672 from
+= (this->object_
->output_section(this->shndx_
)->address()
2677 switch (gsym
->source())
2679 case Symbol::FROM_OBJECT
:
2681 Object
* symobj
= gsym
->object();
2682 if (symobj
->is_dynamic()
2683 || symobj
->pluginobj() != NULL
)
2686 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2687 if (shndx
== elfcpp::SHN_UNDEF
)
2692 case Symbol::IS_UNDEFINED
:
2698 Symbol_table::Compute_final_value_status status
;
2699 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2700 if (status
!= Symbol_table::CFVS_OK
)
2703 to
+= this->object_
->ppc64_local_entry_offset(gsym
);
2707 const Symbol_value
<size
>* psymval
2708 = this->object_
->local_symbol(this->r_sym_
);
2709 Symbol_value
<size
> symval
;
2710 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2711 typename
ObjType::Compute_final_local_value_status status
2712 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2714 if (status
!= ObjType::CFLV_OK
2715 || !symval
.has_output_value())
2717 to
= symval
.value(this->object_
, 0);
2719 to
+= this->object_
->ppc64_local_entry_offset(this->r_sym_
);
2721 if (!(size
== 32 && this->r_type_
== elfcpp::R_PPC_PLTREL24
))
2722 to
+= this->addend_
;
2723 if (stub_table
== NULL
)
2724 stub_table
= this->object_
->stub_table(this->shndx_
);
2725 if (size
== 64 && target
->abiversion() < 2)
2727 unsigned int dest_shndx
;
2728 if (!target
->symval_for_branch(symtab
, gsym
, this->object_
,
2732 Address delta
= to
- from
;
2733 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2735 if (stub_table
== NULL
)
2737 gold_warning(_("%s:%s: branch in non-executable section,"
2738 " no long branch stub for you"),
2739 this->object_
->name().c_str(),
2740 this->object_
->section_name(this->shndx_
).c_str());
2743 return stub_table
->add_long_branch_entry(this->object_
,
2744 this->r_type_
, from
, to
);
2750 // Relaxation hook. This is where we do stub generation.
2752 template<int size
, bool big_endian
>
2754 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2755 const Input_objects
*,
2756 Symbol_table
* symtab
,
2760 unsigned int prev_brlt_size
= 0;
2764 = this->abiversion() < 2 && parameters
->options().plt_thread_safe();
2766 && this->abiversion() < 2
2768 && !parameters
->options().user_set_plt_thread_safe())
2770 static const char* const thread_starter
[] =
2774 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2776 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2777 "mq_notify", "create_timer",
2782 "GOMP_parallel_start",
2783 "GOMP_parallel_loop_static",
2784 "GOMP_parallel_loop_static_start",
2785 "GOMP_parallel_loop_dynamic",
2786 "GOMP_parallel_loop_dynamic_start",
2787 "GOMP_parallel_loop_guided",
2788 "GOMP_parallel_loop_guided_start",
2789 "GOMP_parallel_loop_runtime",
2790 "GOMP_parallel_loop_runtime_start",
2791 "GOMP_parallel_sections",
2792 "GOMP_parallel_sections_start",
2797 if (parameters
->options().shared())
2801 for (unsigned int i
= 0;
2802 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2805 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2806 thread_safe
= (sym
!= NULL
2808 && sym
->in_real_elf());
2814 this->plt_thread_safe_
= thread_safe
;
2819 this->stub_group_size_
= parameters
->options().stub_group_size();
2820 bool no_size_errors
= true;
2821 if (this->stub_group_size_
== 1)
2822 this->stub_group_size_
= 0x1c00000;
2823 else if (this->stub_group_size_
== -1)
2824 this->stub_group_size_
= -0x1e00000;
2826 no_size_errors
= false;
2827 this->group_sections(layout
, task
, no_size_errors
);
2829 else if (this->relax_failed_
&& this->relax_fail_count_
< 3)
2831 this->branch_lookup_table_
.clear();
2832 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2833 p
!= this->stub_tables_
.end();
2836 (*p
)->clear_stubs(true);
2838 this->stub_tables_
.clear();
2839 this->stub_group_size_
= this->stub_group_size_
/ 4 * 3;
2840 gold_info(_("%s: stub group size is too large; retrying with %d"),
2841 program_name
, this->stub_group_size_
);
2842 this->group_sections(layout
, task
, true);
2845 // We need address of stub tables valid for make_stub.
2846 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2847 p
!= this->stub_tables_
.end();
2850 const Powerpc_relobj
<size
, big_endian
>* object
2851 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2852 Address off
= object
->get_output_section_offset((*p
)->shndx());
2853 gold_assert(off
!= invalid_address
);
2854 Output_section
* os
= (*p
)->output_section();
2855 (*p
)->set_address_and_size(os
, off
);
2860 // Clear plt call stubs, long branch stubs and branch lookup table.
2861 prev_brlt_size
= this->branch_lookup_table_
.size();
2862 this->branch_lookup_table_
.clear();
2863 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2864 p
!= this->stub_tables_
.end();
2867 (*p
)->clear_stubs(false);
2871 // Build all the stubs.
2872 this->relax_failed_
= false;
2873 Stub_table
<size
, big_endian
>* ifunc_stub_table
2874 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2875 Stub_table
<size
, big_endian
>* one_stub_table
2876 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2877 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2878 b
!= this->branch_info_
.end();
2881 if (!b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
)
2882 && !this->relax_failed_
)
2884 this->relax_failed_
= true;
2885 this->relax_fail_count_
++;
2886 if (this->relax_fail_count_
< 3)
2891 // Did anything change size?
2892 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2893 bool again
= num_huge_branches
!= prev_brlt_size
;
2894 if (size
== 64 && num_huge_branches
!= 0)
2895 this->make_brlt_section(layout
);
2896 if (size
== 64 && again
)
2897 this->brlt_section_
->set_current_size(num_huge_branches
);
2899 typedef Unordered_set
<Output_section
*> Output_sections
;
2900 Output_sections os_need_update
;
2901 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2902 p
!= this->stub_tables_
.end();
2905 if ((*p
)->size_update())
2908 (*p
)->add_eh_frame(layout
);
2909 os_need_update
.insert((*p
)->output_section());
2913 // Set output section offsets for all input sections in an output
2914 // section that just changed size. Anything past the stubs will
2916 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2917 p
!= os_need_update
.end();
2920 Output_section
* os
= *p
;
2922 typedef Output_section::Input_section_list Input_section_list
;
2923 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2924 i
!= os
->input_sections().end();
2927 off
= align_address(off
, i
->addralign());
2928 if (i
->is_input_section() || i
->is_relaxed_input_section())
2929 i
->relobj()->set_section_offset(i
->shndx(), off
);
2930 if (i
->is_relaxed_input_section())
2932 Stub_table
<size
, big_endian
>* stub_table
2933 = static_cast<Stub_table
<size
, big_endian
>*>(
2934 i
->relaxed_input_section());
2935 off
+= stub_table
->set_address_and_size(os
, off
);
2938 off
+= i
->data_size();
2940 // If .branch_lt is part of this output section, then we have
2941 // just done the offset adjustment.
2942 os
->clear_section_offsets_need_adjustment();
2947 && num_huge_branches
!= 0
2948 && parameters
->options().output_is_position_independent())
2950 // Fill in the BRLT relocs.
2951 this->brlt_section_
->reset_brlt_sizes();
2952 for (typename
Branch_lookup_table::const_iterator p
2953 = this->branch_lookup_table_
.begin();
2954 p
!= this->branch_lookup_table_
.end();
2957 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2959 this->brlt_section_
->finalize_brlt_sizes();
2964 template<int size
, bool big_endian
>
2966 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2967 unsigned char* oview
,
2971 uint64_t address
= plt
->address();
2972 off_t len
= plt
->data_size();
2974 if (plt
== this->glink_
)
2976 // See Output_data_glink::do_write() for glink contents.
2979 gold_assert(parameters
->doing_static_link());
2980 // Static linking may need stubs, to support ifunc and long
2981 // branches. We need to create an output section for
2982 // .eh_frame early in the link process, to have a place to
2983 // attach stub .eh_frame info. We also need to have
2984 // registered a CIE that matches the stub CIE. Both of
2985 // these requirements are satisfied by creating an FDE and
2986 // CIE for .glink, even though static linking will leave
2987 // .glink zero length.
2988 // ??? Hopefully generating an FDE with a zero address range
2989 // won't confuse anything that consumes .eh_frame info.
2991 else if (size
== 64)
2993 // There is one word before __glink_PLTresolve
2997 else if (parameters
->options().output_is_position_independent())
2999 // There are two FDEs for a position independent glink.
3000 // The first covers the branch table, the second
3001 // __glink_PLTresolve at the end of glink.
3002 off_t resolve_size
= this->glink_
->pltresolve_size
;
3003 if (oview
[9] == elfcpp::DW_CFA_nop
)
3004 len
-= resolve_size
;
3007 address
+= len
- resolve_size
;
3014 // Must be a stub table.
3015 const Stub_table
<size
, big_endian
>* stub_table
3016 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
3017 uint64_t stub_address
= stub_table
->stub_address();
3018 len
-= stub_address
- address
;
3019 address
= stub_address
;
3022 *paddress
= address
;
3026 // A class to handle the PLT data.
3028 template<int size
, bool big_endian
>
3029 class Output_data_plt_powerpc
: public Output_section_data_build
3032 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3033 size
, big_endian
> Reloc_section
;
3035 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3036 Reloc_section
* plt_rel
,
3038 : Output_section_data_build(size
== 32 ? 4 : 8),
3044 // Add an entry to the PLT.
3049 add_ifunc_entry(Symbol
*);
3052 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
3054 // Return the .rela.plt section data.
3061 // Return the number of PLT entries.
3065 if (this->current_data_size() == 0)
3067 return ((this->current_data_size() - this->first_plt_entry_offset())
3068 / this->plt_entry_size());
3073 do_adjust_output_section(Output_section
* os
)
3078 // Write to a map file.
3080 do_print_to_mapfile(Mapfile
* mapfile
) const
3081 { mapfile
->print_output_data(this, this->name_
); }
3084 // Return the offset of the first non-reserved PLT entry.
3086 first_plt_entry_offset() const
3088 // IPLT has no reserved entry.
3089 if (this->name_
[3] == 'I')
3091 return this->targ_
->first_plt_entry_offset();
3094 // Return the size of each PLT entry.
3096 plt_entry_size() const
3098 return this->targ_
->plt_entry_size();
3101 // Write out the PLT data.
3103 do_write(Output_file
*);
3105 // The reloc section.
3106 Reloc_section
* rel_
;
3107 // Allows access to .glink for do_write.
3108 Target_powerpc
<size
, big_endian
>* targ_
;
3109 // What to report in map file.
3113 // Add an entry to the PLT.
3115 template<int size
, bool big_endian
>
3117 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3119 if (!gsym
->has_plt_offset())
3121 section_size_type off
= this->current_data_size();
3123 off
+= this->first_plt_entry_offset();
3124 gsym
->set_plt_offset(off
);
3125 gsym
->set_needs_dynsym_entry();
3126 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
3127 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
3128 off
+= this->plt_entry_size();
3129 this->set_current_data_size(off
);
3133 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3135 template<int size
, bool big_endian
>
3137 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
3139 if (!gsym
->has_plt_offset())
3141 section_size_type off
= this->current_data_size();
3142 gsym
->set_plt_offset(off
);
3143 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3144 if (size
== 64 && this->targ_
->abiversion() < 2)
3145 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3146 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
3147 off
+= this->plt_entry_size();
3148 this->set_current_data_size(off
);
3152 // Add an entry for a local ifunc symbol to the IPLT.
3154 template<int size
, bool big_endian
>
3156 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
3157 Sized_relobj_file
<size
, big_endian
>* relobj
,
3158 unsigned int local_sym_index
)
3160 if (!relobj
->local_has_plt_offset(local_sym_index
))
3162 section_size_type off
= this->current_data_size();
3163 relobj
->set_local_plt_offset(local_sym_index
, off
);
3164 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3165 if (size
== 64 && this->targ_
->abiversion() < 2)
3166 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
3167 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
3169 off
+= this->plt_entry_size();
3170 this->set_current_data_size(off
);
3174 static const uint32_t add_0_11_11
= 0x7c0b5a14;
3175 static const uint32_t add_2_2_11
= 0x7c425a14;
3176 static const uint32_t add_3_3_2
= 0x7c631214;
3177 static const uint32_t add_3_3_13
= 0x7c636a14;
3178 static const uint32_t add_11_0_11
= 0x7d605a14;
3179 static const uint32_t add_11_2_11
= 0x7d625a14;
3180 static const uint32_t add_11_11_2
= 0x7d6b1214;
3181 static const uint32_t addi_0_12
= 0x380c0000;
3182 static const uint32_t addi_2_2
= 0x38420000;
3183 static const uint32_t addi_3_3
= 0x38630000;
3184 static const uint32_t addi_11_11
= 0x396b0000;
3185 static const uint32_t addi_12_1
= 0x39810000;
3186 static const uint32_t addi_12_12
= 0x398c0000;
3187 static const uint32_t addis_0_2
= 0x3c020000;
3188 static const uint32_t addis_0_13
= 0x3c0d0000;
3189 static const uint32_t addis_2_12
= 0x3c4c0000;
3190 static const uint32_t addis_11_2
= 0x3d620000;
3191 static const uint32_t addis_11_11
= 0x3d6b0000;
3192 static const uint32_t addis_11_30
= 0x3d7e0000;
3193 static const uint32_t addis_12_1
= 0x3d810000;
3194 static const uint32_t addis_12_2
= 0x3d820000;
3195 static const uint32_t addis_12_12
= 0x3d8c0000;
3196 static const uint32_t b
= 0x48000000;
3197 static const uint32_t bcl_20_31
= 0x429f0005;
3198 static const uint32_t bctr
= 0x4e800420;
3199 static const uint32_t blr
= 0x4e800020;
3200 static const uint32_t bnectr_p4
= 0x4ce20420;
3201 static const uint32_t cmpld_7_12_0
= 0x7fac0040;
3202 static const uint32_t cmpldi_2_0
= 0x28220000;
3203 static const uint32_t cror_15_15_15
= 0x4def7b82;
3204 static const uint32_t cror_31_31_31
= 0x4ffffb82;
3205 static const uint32_t ld_0_1
= 0xe8010000;
3206 static const uint32_t ld_0_12
= 0xe80c0000;
3207 static const uint32_t ld_2_1
= 0xe8410000;
3208 static const uint32_t ld_2_2
= 0xe8420000;
3209 static const uint32_t ld_2_11
= 0xe84b0000;
3210 static const uint32_t ld_11_2
= 0xe9620000;
3211 static const uint32_t ld_11_11
= 0xe96b0000;
3212 static const uint32_t ld_12_2
= 0xe9820000;
3213 static const uint32_t ld_12_11
= 0xe98b0000;
3214 static const uint32_t ld_12_12
= 0xe98c0000;
3215 static const uint32_t lfd_0_1
= 0xc8010000;
3216 static const uint32_t li_0_0
= 0x38000000;
3217 static const uint32_t li_12_0
= 0x39800000;
3218 static const uint32_t lis_0
= 0x3c000000;
3219 static const uint32_t lis_11
= 0x3d600000;
3220 static const uint32_t lis_12
= 0x3d800000;
3221 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
3222 static const uint32_t lwz_0_12
= 0x800c0000;
3223 static const uint32_t lwz_11_11
= 0x816b0000;
3224 static const uint32_t lwz_11_30
= 0x817e0000;
3225 static const uint32_t lwz_12_12
= 0x818c0000;
3226 static const uint32_t lwzu_0_12
= 0x840c0000;
3227 static const uint32_t mflr_0
= 0x7c0802a6;
3228 static const uint32_t mflr_11
= 0x7d6802a6;
3229 static const uint32_t mflr_12
= 0x7d8802a6;
3230 static const uint32_t mtctr_0
= 0x7c0903a6;
3231 static const uint32_t mtctr_11
= 0x7d6903a6;
3232 static const uint32_t mtctr_12
= 0x7d8903a6;
3233 static const uint32_t mtlr_0
= 0x7c0803a6;
3234 static const uint32_t mtlr_12
= 0x7d8803a6;
3235 static const uint32_t nop
= 0x60000000;
3236 static const uint32_t ori_0_0_0
= 0x60000000;
3237 static const uint32_t srdi_0_0_2
= 0x7800f082;
3238 static const uint32_t std_0_1
= 0xf8010000;
3239 static const uint32_t std_0_12
= 0xf80c0000;
3240 static const uint32_t std_2_1
= 0xf8410000;
3241 static const uint32_t stfd_0_1
= 0xd8010000;
3242 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
3243 static const uint32_t sub_11_11_12
= 0x7d6c5850;
3244 static const uint32_t sub_12_12_11
= 0x7d8b6050;
3245 static const uint32_t xor_2_12_12
= 0x7d826278;
3246 static const uint32_t xor_11_12_12
= 0x7d8b6278;
3248 // Write out the PLT.
3250 template<int size
, bool big_endian
>
3252 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3254 if (size
== 32 && this->name_
[3] != 'I')
3256 const section_size_type offset
= this->offset();
3257 const section_size_type oview_size
3258 = convert_to_section_size_type(this->data_size());
3259 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3260 unsigned char* pov
= oview
;
3261 unsigned char* endpov
= oview
+ oview_size
;
3263 // The address of the .glink branch table
3264 const Output_data_glink
<size
, big_endian
>* glink
3265 = this->targ_
->glink_section();
3266 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
3268 while (pov
< endpov
)
3270 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
3275 of
->write_output_view(offset
, oview_size
, oview
);
3279 // Create the PLT section.
3281 template<int size
, bool big_endian
>
3283 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
3286 if (this->plt_
== NULL
)
3288 if (this->got_
== NULL
)
3289 this->got_section(symtab
, layout
);
3291 if (this->glink_
== NULL
)
3292 make_glink_section(layout
);
3294 // Ensure that .rela.dyn always appears before .rela.plt This is
3295 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3296 // needs to include .rela.plt in its range.
3297 this->rela_dyn_section(layout
);
3299 Reloc_section
* plt_rel
= new Reloc_section(false);
3300 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3301 elfcpp::SHF_ALLOC
, plt_rel
,
3302 ORDER_DYNAMIC_PLT_RELOCS
, false);
3304 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
3306 layout
->add_output_section_data(".plt",
3308 ? elfcpp::SHT_PROGBITS
3309 : elfcpp::SHT_NOBITS
),
3310 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3319 // Create the IPLT section.
3321 template<int size
, bool big_endian
>
3323 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
3326 if (this->iplt_
== NULL
)
3328 this->make_plt_section(symtab
, layout
);
3330 Reloc_section
* iplt_rel
= new Reloc_section(false);
3331 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
3333 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
3335 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3339 // A section for huge long branch addresses, similar to plt section.
3341 template<int size
, bool big_endian
>
3342 class Output_data_brlt_powerpc
: public Output_section_data_build
3345 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3346 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3347 size
, big_endian
> Reloc_section
;
3349 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3350 Reloc_section
* brlt_rel
)
3351 : Output_section_data_build(size
== 32 ? 4 : 8),
3359 this->reset_data_size();
3360 this->rel_
->reset_data_size();
3364 finalize_brlt_sizes()
3366 this->finalize_data_size();
3367 this->rel_
->finalize_data_size();
3370 // Add a reloc for an entry in the BRLT.
3372 add_reloc(Address to
, unsigned int off
)
3373 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3375 // Update section and reloc section size.
3377 set_current_size(unsigned int num_branches
)
3379 this->reset_address_and_file_offset();
3380 this->set_current_data_size(num_branches
* 16);
3381 this->finalize_data_size();
3382 Output_section
* os
= this->output_section();
3383 os
->set_section_offsets_need_adjustment();
3384 if (this->rel_
!= NULL
)
3386 unsigned int reloc_size
3387 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3388 this->rel_
->reset_address_and_file_offset();
3389 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3390 this->rel_
->finalize_data_size();
3391 Output_section
* os
= this->rel_
->output_section();
3392 os
->set_section_offsets_need_adjustment();
3398 do_adjust_output_section(Output_section
* os
)
3403 // Write to a map file.
3405 do_print_to_mapfile(Mapfile
* mapfile
) const
3406 { mapfile
->print_output_data(this, "** BRLT"); }
3409 // Write out the BRLT data.
3411 do_write(Output_file
*);
3413 // The reloc section.
3414 Reloc_section
* rel_
;
3415 Target_powerpc
<size
, big_endian
>* targ_
;
3418 // Make the branch lookup table section.
3420 template<int size
, bool big_endian
>
3422 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3424 if (size
== 64 && this->brlt_section_
== NULL
)
3426 Reloc_section
* brlt_rel
= NULL
;
3427 bool is_pic
= parameters
->options().output_is_position_independent();
3430 // When PIC we can't fill in .branch_lt (like .plt it can be
3431 // a bss style section) but must initialise at runtime via
3432 // dynamic relocats.
3433 this->rela_dyn_section(layout
);
3434 brlt_rel
= new Reloc_section(false);
3435 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3438 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3439 if (this->plt_
&& is_pic
)
3440 this->plt_
->output_section()
3441 ->add_output_section_data(this->brlt_section_
);
3443 layout
->add_output_section_data(".branch_lt",
3444 (is_pic
? elfcpp::SHT_NOBITS
3445 : elfcpp::SHT_PROGBITS
),
3446 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3447 this->brlt_section_
,
3448 (is_pic
? ORDER_SMALL_BSS
3449 : ORDER_SMALL_DATA
),
3454 // Write out .branch_lt when non-PIC.
3456 template<int size
, bool big_endian
>
3458 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3460 if (size
== 64 && !parameters
->options().output_is_position_independent())
3462 const section_size_type offset
= this->offset();
3463 const section_size_type oview_size
3464 = convert_to_section_size_type(this->data_size());
3465 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3467 this->targ_
->write_branch_lookup_table(oview
);
3468 of
->write_output_view(offset
, oview_size
, oview
);
3472 static inline uint32_t
3478 static inline uint32_t
3484 static inline uint32_t
3487 return hi(a
+ 0x8000);
3493 static const unsigned char eh_frame_cie
[12];
3497 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3500 'z', 'R', 0, // Augmentation string.
3501 4, // Code alignment.
3502 0x80 - size
/ 8 , // Data alignment.
3504 1, // Augmentation size.
3505 (elfcpp::DW_EH_PE_pcrel
3506 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3507 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3510 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
3511 static const unsigned char glink_eh_frame_fde_64v1
[] =
3513 0, 0, 0, 0, // Replaced with offset to .glink.
3514 0, 0, 0, 0, // Replaced with size of .glink.
3515 0, // Augmentation size.
3516 elfcpp::DW_CFA_advance_loc
+ 1,
3517 elfcpp::DW_CFA_register
, 65, 12,
3518 elfcpp::DW_CFA_advance_loc
+ 4,
3519 elfcpp::DW_CFA_restore_extended
, 65
3522 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
3523 static const unsigned char glink_eh_frame_fde_64v2
[] =
3525 0, 0, 0, 0, // Replaced with offset to .glink.
3526 0, 0, 0, 0, // Replaced with size of .glink.
3527 0, // Augmentation size.
3528 elfcpp::DW_CFA_advance_loc
+ 1,
3529 elfcpp::DW_CFA_register
, 65, 0,
3530 elfcpp::DW_CFA_advance_loc
+ 4,
3531 elfcpp::DW_CFA_restore_extended
, 65
3534 // Describe __glink_PLTresolve use of LR, 32-bit version.
3535 static const unsigned char glink_eh_frame_fde_32
[] =
3537 0, 0, 0, 0, // Replaced with offset to .glink.
3538 0, 0, 0, 0, // Replaced with size of .glink.
3539 0, // Augmentation size.
3540 elfcpp::DW_CFA_advance_loc
+ 2,
3541 elfcpp::DW_CFA_register
, 65, 0,
3542 elfcpp::DW_CFA_advance_loc
+ 4,
3543 elfcpp::DW_CFA_restore_extended
, 65
3546 static const unsigned char default_fde
[] =
3548 0, 0, 0, 0, // Replaced with offset to stubs.
3549 0, 0, 0, 0, // Replaced with size of stubs.
3550 0, // Augmentation size.
3551 elfcpp::DW_CFA_nop
, // Pad.
3556 template<bool big_endian
>
3558 write_insn(unsigned char* p
, uint32_t v
)
3560 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3563 // Stub_table holds information about plt and long branch stubs.
3564 // Stubs are built in an area following some input section determined
3565 // by group_sections(). This input section is converted to a relaxed
3566 // input section allowing it to be resized to accommodate the stubs
3568 template<int size
, bool big_endian
>
3569 class Stub_table
: public Output_relaxed_input_section
3572 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3573 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3575 Stub_table(Target_powerpc
<size
, big_endian
>* targ
,
3576 Output_section
* output_section
,
3577 const Output_section::Input_section
* owner
)
3578 : Output_relaxed_input_section(owner
->relobj(), owner
->shndx(),
3580 ->section_addralign(owner
->shndx())),
3581 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3582 orig_data_size_(owner
->current_data_size()),
3583 plt_size_(0), last_plt_size_(0),
3584 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3586 this->set_output_section(output_section
);
3588 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3589 new_relaxed
.push_back(this);
3590 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3593 // Add a plt call stub.
3595 add_plt_call_entry(Address
,
3596 const Sized_relobj_file
<size
, big_endian
>*,
3602 add_plt_call_entry(Address
,
3603 const Sized_relobj_file
<size
, big_endian
>*,
3608 // Find a given plt call stub.
3610 find_plt_call_entry(const Symbol
*) const;
3613 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3614 unsigned int) const;
3617 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3623 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3628 // Add a long branch stub.
3630 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3631 unsigned int, Address
, Address
);
3634 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3638 can_reach_stub(Address from
, unsigned int off
, unsigned int r_type
)
3640 Address max_branch_offset
= max_branch_delta(r_type
);
3641 if (max_branch_offset
== 0)
3643 gold_assert(from
!= invalid_address
);
3644 Address loc
= off
+ this->stub_address();
3645 return loc
- from
+ max_branch_offset
< 2 * max_branch_offset
;
3649 clear_stubs(bool all
)
3651 this->plt_call_stubs_
.clear();
3652 this->plt_size_
= 0;
3653 this->long_branch_stubs_
.clear();
3654 this->branch_size_
= 0;
3657 this->last_plt_size_
= 0;
3658 this->last_branch_size_
= 0;
3663 set_address_and_size(const Output_section
* os
, Address off
)
3665 Address start_off
= off
;
3666 off
+= this->orig_data_size_
;
3667 Address my_size
= this->plt_size_
+ this->branch_size_
;
3669 off
= align_address(off
, this->stub_align());
3670 // Include original section size and alignment padding in size
3671 my_size
+= off
- start_off
;
3672 this->reset_address_and_file_offset();
3673 this->set_current_data_size(my_size
);
3674 this->set_address_and_file_offset(os
->address() + start_off
,
3675 os
->offset() + start_off
);
3680 stub_address() const
3682 return align_address(this->address() + this->orig_data_size_
,
3683 this->stub_align());
3689 return align_address(this->offset() + this->orig_data_size_
,
3690 this->stub_align());
3695 { return this->plt_size_
; }
3700 Output_section
* os
= this->output_section();
3701 if (os
->addralign() < this->stub_align())
3703 os
->set_addralign(this->stub_align());
3704 // FIXME: get rid of the insane checkpointing.
3705 // We can't increase alignment of the input section to which
3706 // stubs are attached; The input section may be .init which
3707 // is pasted together with other .init sections to form a
3708 // function. Aligning might insert zero padding resulting in
3709 // sigill. However we do need to increase alignment of the
3710 // output section so that the align_address() on offset in
3711 // set_address_and_size() adds the same padding as the
3712 // align_address() on address in stub_address().
3713 // What's more, we need this alignment for the layout done in
3714 // relaxation_loop_body() so that the output section starts at
3715 // a suitably aligned address.
3716 os
->checkpoint_set_addralign(this->stub_align());
3718 if (this->last_plt_size_
!= this->plt_size_
3719 || this->last_branch_size_
!= this->branch_size_
)
3721 this->last_plt_size_
= this->plt_size_
;
3722 this->last_branch_size_
= this->branch_size_
;
3728 // Add .eh_frame info for this stub section. Unlike other linker
3729 // generated .eh_frame this is added late in the link, because we
3730 // only want the .eh_frame info if this particular stub section is
3733 add_eh_frame(Layout
* layout
)
3735 if (!this->eh_frame_added_
)
3737 if (!parameters
->options().ld_generated_unwind_info())
3740 // Since we add stub .eh_frame info late, it must be placed
3741 // after all other linker generated .eh_frame info so that
3742 // merge mapping need not be updated for input sections.
3743 // There is no provision to use a different CIE to that used
3745 if (!this->targ_
->has_glink())
3748 layout
->add_eh_frame_for_plt(this,
3749 Eh_cie
<size
>::eh_frame_cie
,
3750 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3752 sizeof (default_fde
));
3753 this->eh_frame_added_
= true;
3757 Target_powerpc
<size
, big_endian
>*
3763 class Plt_stub_ent_hash
;
3764 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3765 Plt_stub_ent_hash
> Plt_stub_entries
;
3767 // Alignment of stub section.
3773 unsigned int min_align
= 32;
3774 unsigned int user_align
= 1 << parameters
->options().plt_align();
3775 return std::max(user_align
, min_align
);
3778 // Return the plt offset for the given call stub.
3780 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3782 const Symbol
* gsym
= p
->first
.sym_
;
3785 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3786 && gsym
->can_use_relative_reloc(false));
3787 return gsym
->plt_offset();
3792 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3793 unsigned int local_sym_index
= p
->first
.locsym_
;
3794 return relobj
->local_plt_offset(local_sym_index
);
3798 // Size of a given plt call stub.
3800 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3806 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3808 plt_addr
+= this->targ_
->iplt_section()->address();
3810 plt_addr
+= this->targ_
->plt_section()->address();
3811 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3812 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3813 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3814 got_addr
+= ppcobj
->toc_base_offset();
3815 Address off
= plt_addr
- got_addr
;
3816 unsigned int bytes
= 4 * 4 + 4 * (ha(off
) != 0);
3817 if (this->targ_
->abiversion() < 2)
3819 bool static_chain
= parameters
->options().plt_static_chain();
3820 bool thread_safe
= this->targ_
->plt_thread_safe();
3824 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3826 unsigned int align
= 1 << parameters
->options().plt_align();
3828 bytes
= (bytes
+ align
- 1) & -align
;
3832 // Return long branch stub size.
3834 branch_stub_size(Address to
)
3837 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3838 if (to
- loc
+ (1 << 25) < 2 << 25)
3840 if (size
== 64 || !parameters
->options().output_is_position_independent())
3847 do_write(Output_file
*);
3849 // Plt call stub keys.
3853 Plt_stub_ent(const Symbol
* sym
)
3854 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3857 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3858 unsigned int locsym_index
)
3859 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3862 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3864 unsigned int r_type
,
3866 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3869 this->addend_
= addend
;
3870 else if (parameters
->options().output_is_position_independent()
3871 && r_type
== elfcpp::R_PPC_PLTREL24
)
3873 this->addend_
= addend
;
3874 if (this->addend_
>= 32768)
3875 this->object_
= object
;
3879 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3880 unsigned int locsym_index
,
3881 unsigned int r_type
,
3883 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3886 this->addend_
= addend
;
3887 else if (parameters
->options().output_is_position_independent()
3888 && r_type
== elfcpp::R_PPC_PLTREL24
)
3889 this->addend_
= addend
;
3892 bool operator==(const Plt_stub_ent
& that
) const
3894 return (this->sym_
== that
.sym_
3895 && this->object_
== that
.object_
3896 && this->addend_
== that
.addend_
3897 && this->locsym_
== that
.locsym_
);
3901 const Sized_relobj_file
<size
, big_endian
>* object_
;
3902 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3903 unsigned int locsym_
;
3906 class Plt_stub_ent_hash
3909 size_t operator()(const Plt_stub_ent
& ent
) const
3911 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3912 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3918 // Long branch stub keys.
3919 class Branch_stub_ent
3922 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3923 : dest_(to
), toc_base_off_(0)
3926 toc_base_off_
= obj
->toc_base_offset();
3929 bool operator==(const Branch_stub_ent
& that
) const
3931 return (this->dest_
== that
.dest_
3933 || this->toc_base_off_
== that
.toc_base_off_
));
3937 unsigned int toc_base_off_
;
3940 class Branch_stub_ent_hash
3943 size_t operator()(const Branch_stub_ent
& ent
) const
3944 { return ent
.dest_
^ ent
.toc_base_off_
; }
3947 // In a sane world this would be a global.
3948 Target_powerpc
<size
, big_endian
>* targ_
;
3949 // Map sym/object/addend to stub offset.
3950 Plt_stub_entries plt_call_stubs_
;
3951 // Map destination address to stub offset.
3952 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3953 Branch_stub_ent_hash
> Branch_stub_entries
;
3954 Branch_stub_entries long_branch_stubs_
;
3955 // size of input section
3956 section_size_type orig_data_size_
;
3958 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3959 // Whether .eh_frame info has been created for this stub section.
3960 bool eh_frame_added_
;
3963 // Add a plt call stub, if we do not already have one for this
3964 // sym/object/addend combo.
3966 template<int size
, bool big_endian
>
3968 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3970 const Sized_relobj_file
<size
, big_endian
>* object
,
3972 unsigned int r_type
,
3975 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3976 unsigned int off
= this->plt_size_
;
3977 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3978 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3980 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3981 return this->can_reach_stub(from
, off
, r_type
);
3984 template<int size
, bool big_endian
>
3986 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3988 const Sized_relobj_file
<size
, big_endian
>* object
,
3989 unsigned int locsym_index
,
3990 unsigned int r_type
,
3993 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3994 unsigned int off
= this->plt_size_
;
3995 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3996 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3998 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3999 return this->can_reach_stub(from
, off
, r_type
);
4002 // Find a plt call stub.
4004 template<int size
, bool big_endian
>
4005 typename Stub_table
<size
, big_endian
>::Address
4006 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4007 const Sized_relobj_file
<size
, big_endian
>* object
,
4009 unsigned int r_type
,
4010 Address addend
) const
4012 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
4013 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4014 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4017 template<int size
, bool big_endian
>
4018 typename Stub_table
<size
, big_endian
>::Address
4019 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
4021 Plt_stub_ent
ent(gsym
);
4022 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4023 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4026 template<int size
, bool big_endian
>
4027 typename Stub_table
<size
, big_endian
>::Address
4028 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4029 const Sized_relobj_file
<size
, big_endian
>* object
,
4030 unsigned int locsym_index
,
4031 unsigned int r_type
,
4032 Address addend
) const
4034 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
4035 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4036 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4039 template<int size
, bool big_endian
>
4040 typename Stub_table
<size
, big_endian
>::Address
4041 Stub_table
<size
, big_endian
>::find_plt_call_entry(
4042 const Sized_relobj_file
<size
, big_endian
>* object
,
4043 unsigned int locsym_index
) const
4045 Plt_stub_ent
ent(object
, locsym_index
);
4046 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
4047 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
4050 // Add a long branch stub if we don't already have one to given
4053 template<int size
, bool big_endian
>
4055 Stub_table
<size
, big_endian
>::add_long_branch_entry(
4056 const Powerpc_relobj
<size
, big_endian
>* object
,
4057 unsigned int r_type
,
4061 Branch_stub_ent
ent(object
, to
);
4062 Address off
= this->branch_size_
;
4063 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
4065 unsigned int stub_size
= this->branch_stub_size(to
);
4066 this->branch_size_
= off
+ stub_size
;
4067 if (size
== 64 && stub_size
!= 4)
4068 this->targ_
->add_branch_lookup_table(to
);
4070 return this->can_reach_stub(from
, off
, r_type
);
4073 // Find long branch stub.
4075 template<int size
, bool big_endian
>
4076 typename Stub_table
<size
, big_endian
>::Address
4077 Stub_table
<size
, big_endian
>::find_long_branch_entry(
4078 const Powerpc_relobj
<size
, big_endian
>* object
,
4081 Branch_stub_ent
ent(object
, to
);
4082 typename
Branch_stub_entries::const_iterator p
4083 = this->long_branch_stubs_
.find(ent
);
4084 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
4087 // A class to handle .glink.
4089 template<int size
, bool big_endian
>
4090 class Output_data_glink
: public Output_section_data
4093 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4094 static const Address invalid_address
= static_cast<Address
>(0) - 1;
4095 static const int pltresolve_size
= 16*4;
4097 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
4098 : Output_section_data(16), targ_(targ
), global_entry_stubs_(),
4099 end_branch_table_(), ge_size_(0)
4103 add_eh_frame(Layout
* layout
);
4106 add_global_entry(const Symbol
*);
4109 find_global_entry(const Symbol
*) const;
4112 global_entry_address() const
4114 gold_assert(this->is_data_size_valid());
4115 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4116 return this->address() + global_entry_off
;
4120 // Write to a map file.
4122 do_print_to_mapfile(Mapfile
* mapfile
) const
4123 { mapfile
->print_output_data(this, _("** glink")); }
4127 set_final_data_size();
4131 do_write(Output_file
*);
4133 // Allows access to .got and .plt for do_write.
4134 Target_powerpc
<size
, big_endian
>* targ_
;
4136 // Map sym to stub offset.
4137 typedef Unordered_map
<const Symbol
*, unsigned int> Global_entry_stub_entries
;
4138 Global_entry_stub_entries global_entry_stubs_
;
4140 unsigned int end_branch_table_
, ge_size_
;
4143 template<int size
, bool big_endian
>
4145 Output_data_glink
<size
, big_endian
>::add_eh_frame(Layout
* layout
)
4147 if (!parameters
->options().ld_generated_unwind_info())
4152 if (this->targ_
->abiversion() < 2)
4153 layout
->add_eh_frame_for_plt(this,
4154 Eh_cie
<64>::eh_frame_cie
,
4155 sizeof (Eh_cie
<64>::eh_frame_cie
),
4156 glink_eh_frame_fde_64v1
,
4157 sizeof (glink_eh_frame_fde_64v1
));
4159 layout
->add_eh_frame_for_plt(this,
4160 Eh_cie
<64>::eh_frame_cie
,
4161 sizeof (Eh_cie
<64>::eh_frame_cie
),
4162 glink_eh_frame_fde_64v2
,
4163 sizeof (glink_eh_frame_fde_64v2
));
4167 // 32-bit .glink can use the default since the CIE return
4168 // address reg, LR, is valid.
4169 layout
->add_eh_frame_for_plt(this,
4170 Eh_cie
<32>::eh_frame_cie
,
4171 sizeof (Eh_cie
<32>::eh_frame_cie
),
4173 sizeof (default_fde
));
4174 // Except where LR is used in a PIC __glink_PLTresolve.
4175 if (parameters
->options().output_is_position_independent())
4176 layout
->add_eh_frame_for_plt(this,
4177 Eh_cie
<32>::eh_frame_cie
,
4178 sizeof (Eh_cie
<32>::eh_frame_cie
),
4179 glink_eh_frame_fde_32
,
4180 sizeof (glink_eh_frame_fde_32
));
4184 template<int size
, bool big_endian
>
4186 Output_data_glink
<size
, big_endian
>::add_global_entry(const Symbol
* gsym
)
4188 std::pair
<typename
Global_entry_stub_entries::iterator
, bool> p
4189 = this->global_entry_stubs_
.insert(std::make_pair(gsym
, this->ge_size_
));
4191 this->ge_size_
+= 16;
4194 template<int size
, bool big_endian
>
4195 typename Output_data_glink
<size
, big_endian
>::Address
4196 Output_data_glink
<size
, big_endian
>::find_global_entry(const Symbol
* gsym
) const
4198 typename
Global_entry_stub_entries::const_iterator p
4199 = this->global_entry_stubs_
.find(gsym
);
4200 return p
== this->global_entry_stubs_
.end() ? invalid_address
: p
->second
;
4203 template<int size
, bool big_endian
>
4205 Output_data_glink
<size
, big_endian
>::set_final_data_size()
4207 unsigned int count
= this->targ_
->plt_entry_count();
4208 section_size_type total
= 0;
4214 // space for branch table
4215 total
+= 4 * (count
- 1);
4217 total
+= -total
& 15;
4218 total
+= this->pltresolve_size
;
4222 total
+= this->pltresolve_size
;
4224 // space for branch table
4226 if (this->targ_
->abiversion() < 2)
4230 total
+= 4 * (count
- 0x8000);
4234 this->end_branch_table_
= total
;
4235 total
= (total
+ 15) & -16;
4236 total
+= this->ge_size_
;
4238 this->set_data_size(total
);
4241 // Write out plt and long branch stub code.
4243 template<int size
, bool big_endian
>
4245 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
4247 if (this->plt_call_stubs_
.empty()
4248 && this->long_branch_stubs_
.empty())
4251 const section_size_type start_off
= this->offset();
4252 const section_size_type off
= this->stub_offset();
4253 const section_size_type oview_size
=
4254 convert_to_section_size_type(this->data_size() - (off
- start_off
));
4255 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4260 const Output_data_got_powerpc
<size
, big_endian
>* got
4261 = this->targ_
->got_section();
4262 Address got_os_addr
= got
->output_section()->address();
4264 if (!this->plt_call_stubs_
.empty())
4266 // The base address of the .plt section.
4267 Address plt_base
= this->targ_
->plt_section()->address();
4268 Address iplt_base
= invalid_address
;
4270 // Write out plt call stubs.
4271 typename
Plt_stub_entries::const_iterator cs
;
4272 for (cs
= this->plt_call_stubs_
.begin();
4273 cs
!= this->plt_call_stubs_
.end();
4277 Address pltoff
= this->plt_off(cs
, &is_iplt
);
4278 Address plt_addr
= pltoff
;
4281 if (iplt_base
== invalid_address
)
4282 iplt_base
= this->targ_
->iplt_section()->address();
4283 plt_addr
+= iplt_base
;
4286 plt_addr
+= plt_base
;
4287 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
4288 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
4289 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
4290 Address off
= plt_addr
- got_addr
;
4292 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
4293 gold_error(_("%s: linkage table error against `%s'"),
4294 cs
->first
.object_
->name().c_str(),
4295 cs
->first
.sym_
->demangled_name().c_str());
4297 bool plt_load_toc
= this->targ_
->abiversion() < 2;
4299 = plt_load_toc
&& parameters
->options().plt_static_chain();
4301 = plt_load_toc
&& this->targ_
->plt_thread_safe();
4302 bool use_fake_dep
= false;
4303 Address cmp_branch_off
= 0;
4306 unsigned int pltindex
4307 = ((pltoff
- this->targ_
->first_plt_entry_offset())
4308 / this->targ_
->plt_entry_size());
4310 = (this->targ_
->glink_section()->pltresolve_size
4312 if (pltindex
> 32768)
4313 glinkoff
+= (pltindex
- 32768) * 4;
4315 = this->targ_
->glink_section()->address() + glinkoff
;
4317 = (this->stub_address() + cs
->second
+ 24
4318 + 4 * (ha(off
) != 0)
4319 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4320 + 4 * static_chain
);
4321 cmp_branch_off
= to
- from
;
4322 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
4325 p
= oview
+ cs
->second
;
4328 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4332 write_insn
<big_endian
>(p
, addis_11_2
+ ha(off
));
4334 write_insn
<big_endian
>(p
, ld_12_11
+ l(off
));
4339 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
));
4341 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
));
4345 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4347 write_insn
<big_endian
>(p
, addi_11_11
+ l(off
));
4351 write_insn
<big_endian
>(p
, mtctr_12
);
4357 write_insn
<big_endian
>(p
, xor_2_12_12
);
4359 write_insn
<big_endian
>(p
, add_11_11_2
);
4362 write_insn
<big_endian
>(p
, ld_2_11
+ l(off
+ 8));
4366 write_insn
<big_endian
>(p
, ld_11_11
+ l(off
+ 16));
4373 write_insn
<big_endian
>(p
, std_2_1
+ this->targ_
->stk_toc());
4375 write_insn
<big_endian
>(p
, ld_12_2
+ l(off
));
4378 && ha(off
+ 8 + 8 * static_chain
) != ha(off
))
4380 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
));
4384 write_insn
<big_endian
>(p
, mtctr_12
);
4390 write_insn
<big_endian
>(p
, xor_11_12_12
);
4392 write_insn
<big_endian
>(p
, add_2_2_11
);
4397 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16));
4400 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8));
4404 if (thread_safe
&& !use_fake_dep
)
4406 write_insn
<big_endian
>(p
, cmpldi_2_0
);
4408 write_insn
<big_endian
>(p
, bnectr_p4
);
4410 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
4413 write_insn
<big_endian
>(p
, bctr
);
4417 // Write out long branch stubs.
4418 typename
Branch_stub_entries::const_iterator bs
;
4419 for (bs
= this->long_branch_stubs_
.begin();
4420 bs
!= this->long_branch_stubs_
.end();
4423 p
= oview
+ this->plt_size_
+ bs
->second
;
4424 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4425 Address delta
= bs
->first
.dest_
- loc
;
4426 if (delta
+ (1 << 25) < 2 << 25)
4427 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4431 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
4432 gold_assert(brlt_addr
!= invalid_address
);
4433 brlt_addr
+= this->targ_
->brlt_section()->address();
4434 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
4435 Address brltoff
= brlt_addr
- got_addr
;
4436 if (ha(brltoff
) == 0)
4438 write_insn
<big_endian
>(p
, ld_12_2
+ l(brltoff
)), p
+= 4;
4442 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
4443 write_insn
<big_endian
>(p
, ld_12_12
+ l(brltoff
)), p
+= 4;
4445 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4446 write_insn
<big_endian
>(p
, bctr
);
4452 if (!this->plt_call_stubs_
.empty())
4454 // The base address of the .plt section.
4455 Address plt_base
= this->targ_
->plt_section()->address();
4456 Address iplt_base
= invalid_address
;
4457 // The address of _GLOBAL_OFFSET_TABLE_.
4458 Address g_o_t
= invalid_address
;
4460 // Write out plt call stubs.
4461 typename
Plt_stub_entries::const_iterator cs
;
4462 for (cs
= this->plt_call_stubs_
.begin();
4463 cs
!= this->plt_call_stubs_
.end();
4467 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4470 if (iplt_base
== invalid_address
)
4471 iplt_base
= this->targ_
->iplt_section()->address();
4472 plt_addr
+= iplt_base
;
4475 plt_addr
+= plt_base
;
4477 p
= oview
+ cs
->second
;
4478 if (parameters
->options().output_is_position_independent())
4481 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4482 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4483 (cs
->first
.object_
));
4484 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4486 unsigned int got2
= ppcobj
->got2_shndx();
4487 got_addr
= ppcobj
->get_output_section_offset(got2
);
4488 gold_assert(got_addr
!= invalid_address
);
4489 got_addr
+= (ppcobj
->output_section(got2
)->address()
4490 + cs
->first
.addend_
);
4494 if (g_o_t
== invalid_address
)
4496 const Output_data_got_powerpc
<size
, big_endian
>* got
4497 = this->targ_
->got_section();
4498 g_o_t
= got
->address() + got
->g_o_t();
4503 Address off
= plt_addr
- got_addr
;
4506 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4507 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4508 write_insn
<big_endian
>(p
+ 8, bctr
);
4512 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4513 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4514 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4515 write_insn
<big_endian
>(p
+ 12, bctr
);
4520 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4521 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4522 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4523 write_insn
<big_endian
>(p
+ 12, bctr
);
4528 // Write out long branch stubs.
4529 typename
Branch_stub_entries::const_iterator bs
;
4530 for (bs
= this->long_branch_stubs_
.begin();
4531 bs
!= this->long_branch_stubs_
.end();
4534 p
= oview
+ this->plt_size_
+ bs
->second
;
4535 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4536 Address delta
= bs
->first
.dest_
- loc
;
4537 if (delta
+ (1 << 25) < 2 << 25)
4538 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4539 else if (!parameters
->options().output_is_position_independent())
4541 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4542 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4543 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4544 write_insn
<big_endian
>(p
+ 12, bctr
);
4549 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4550 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4551 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4552 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4553 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4554 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4555 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4556 write_insn
<big_endian
>(p
+ 28, bctr
);
4562 // Write out .glink.
4564 template<int size
, bool big_endian
>
4566 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4568 const section_size_type off
= this->offset();
4569 const section_size_type oview_size
=
4570 convert_to_section_size_type(this->data_size());
4571 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4574 // The base address of the .plt section.
4575 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4576 Address plt_base
= this->targ_
->plt_section()->address();
4580 if (this->end_branch_table_
!= 0)
4582 // Write pltresolve stub.
4584 Address after_bcl
= this->address() + 16;
4585 Address pltoff
= plt_base
- after_bcl
;
4587 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4589 if (this->targ_
->abiversion() < 2)
4591 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4592 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4593 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4594 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4595 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4596 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4597 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4598 write_insn
<big_endian
>(p
, ld_2_11
+ 8), p
+= 4;
4599 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4600 write_insn
<big_endian
>(p
, ld_11_11
+ 16), p
+= 4;
4604 write_insn
<big_endian
>(p
, mflr_0
), p
+= 4;
4605 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4606 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4607 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4608 write_insn
<big_endian
>(p
, mtlr_0
), p
+= 4;
4609 write_insn
<big_endian
>(p
, sub_12_12_11
), p
+= 4;
4610 write_insn
<big_endian
>(p
, add_11_2_11
), p
+= 4;
4611 write_insn
<big_endian
>(p
, addi_0_12
+ l(-48)), p
+= 4;
4612 write_insn
<big_endian
>(p
, ld_12_11
+ 0), p
+= 4;
4613 write_insn
<big_endian
>(p
, srdi_0_0_2
), p
+= 4;
4614 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4615 write_insn
<big_endian
>(p
, ld_11_11
+ 8), p
+= 4;
4617 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4618 while (p
< oview
+ this->pltresolve_size
)
4619 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4621 // Write lazy link call stubs.
4623 while (p
< oview
+ this->end_branch_table_
)
4625 if (this->targ_
->abiversion() < 2)
4629 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4633 write_insn
<big_endian
>(p
, lis_0
+ hi(indx
)), p
+= 4;
4634 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4637 uint32_t branch_off
= 8 - (p
- oview
);
4638 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4643 Address plt_base
= this->targ_
->plt_section()->address();
4644 Address iplt_base
= invalid_address
;
4645 unsigned int global_entry_off
= (this->end_branch_table_
+ 15) & -16;
4646 Address global_entry_base
= this->address() + global_entry_off
;
4647 typename
Global_entry_stub_entries::const_iterator ge
;
4648 for (ge
= this->global_entry_stubs_
.begin();
4649 ge
!= this->global_entry_stubs_
.end();
4652 p
= oview
+ global_entry_off
+ ge
->second
;
4653 Address plt_addr
= ge
->first
->plt_offset();
4654 if (ge
->first
->type() == elfcpp::STT_GNU_IFUNC
4655 && ge
->first
->can_use_relative_reloc(false))
4657 if (iplt_base
== invalid_address
)
4658 iplt_base
= this->targ_
->iplt_section()->address();
4659 plt_addr
+= iplt_base
;
4662 plt_addr
+= plt_base
;
4663 Address my_addr
= global_entry_base
+ ge
->second
;
4664 Address off
= plt_addr
- my_addr
;
4666 if (off
+ 0x80008000 > 0xffffffff || (off
& 3) != 0)
4667 gold_error(_("%s: linkage table error against `%s'"),
4668 ge
->first
->object()->name().c_str(),
4669 ge
->first
->demangled_name().c_str());
4671 write_insn
<big_endian
>(p
, addis_12_12
+ ha(off
)), p
+= 4;
4672 write_insn
<big_endian
>(p
, ld_12_12
+ l(off
)), p
+= 4;
4673 write_insn
<big_endian
>(p
, mtctr_12
), p
+= 4;
4674 write_insn
<big_endian
>(p
, bctr
);
4679 const Output_data_got_powerpc
<size
, big_endian
>* got
4680 = this->targ_
->got_section();
4681 // The address of _GLOBAL_OFFSET_TABLE_.
4682 Address g_o_t
= got
->address() + got
->g_o_t();
4684 // Write out pltresolve branch table.
4686 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4687 unsigned char* end_p
= oview
+ the_end
;
4688 while (p
< end_p
- 8 * 4)
4689 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4691 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4693 // Write out pltresolve call stub.
4694 if (parameters
->options().output_is_position_independent())
4696 Address res0_off
= 0;
4697 Address after_bcl_off
= the_end
+ 12;
4698 Address bcl_res0
= after_bcl_off
- res0_off
;
4700 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4701 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4702 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4703 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4704 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4705 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4706 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4708 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4710 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4711 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4713 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4714 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4718 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4719 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4721 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4722 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4723 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4724 write_insn
<big_endian
>(p
+ 52, bctr
);
4725 write_insn
<big_endian
>(p
+ 56, nop
);
4726 write_insn
<big_endian
>(p
+ 60, nop
);
4730 Address res0
= this->address();
4732 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4733 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4734 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4735 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4737 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4738 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4739 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4740 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4741 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4742 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4744 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4745 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4746 write_insn
<big_endian
>(p
+ 32, bctr
);
4747 write_insn
<big_endian
>(p
+ 36, nop
);
4748 write_insn
<big_endian
>(p
+ 40, nop
);
4749 write_insn
<big_endian
>(p
+ 44, nop
);
4750 write_insn
<big_endian
>(p
+ 48, nop
);
4751 write_insn
<big_endian
>(p
+ 52, nop
);
4752 write_insn
<big_endian
>(p
+ 56, nop
);
4753 write_insn
<big_endian
>(p
+ 60, nop
);
4758 of
->write_output_view(off
, oview_size
, oview
);
4762 // A class to handle linker generated save/restore functions.
4764 template<int size
, bool big_endian
>
4765 class Output_data_save_res
: public Output_section_data_build
4768 Output_data_save_res(Symbol_table
* symtab
);
4771 // Write to a map file.
4773 do_print_to_mapfile(Mapfile
* mapfile
) const
4774 { mapfile
->print_output_data(this, _("** save/restore")); }
4777 do_write(Output_file
*);
4780 // The maximum size of save/restore contents.
4781 static const unsigned int savres_max
= 218*4;
4784 savres_define(Symbol_table
* symtab
,
4786 unsigned int lo
, unsigned int hi
,
4787 unsigned char* write_ent(unsigned char*, int),
4788 unsigned char* write_tail(unsigned char*, int));
4790 unsigned char *contents_
;
4793 template<bool big_endian
>
4794 static unsigned char*
4795 savegpr0(unsigned char* p
, int r
)
4797 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4798 write_insn
<big_endian
>(p
, insn
);
4802 template<bool big_endian
>
4803 static unsigned char*
4804 savegpr0_tail(unsigned char* p
, int r
)
4806 p
= savegpr0
<big_endian
>(p
, r
);
4807 uint32_t insn
= std_0_1
+ 16;
4808 write_insn
<big_endian
>(p
, insn
);
4810 write_insn
<big_endian
>(p
, blr
);
4814 template<bool big_endian
>
4815 static unsigned char*
4816 restgpr0(unsigned char* p
, int r
)
4818 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4819 write_insn
<big_endian
>(p
, insn
);
4823 template<bool big_endian
>
4824 static unsigned char*
4825 restgpr0_tail(unsigned char* p
, int r
)
4827 uint32_t insn
= ld_0_1
+ 16;
4828 write_insn
<big_endian
>(p
, insn
);
4830 p
= restgpr0
<big_endian
>(p
, r
);
4831 write_insn
<big_endian
>(p
, mtlr_0
);
4835 p
= restgpr0
<big_endian
>(p
, 30);
4836 p
= restgpr0
<big_endian
>(p
, 31);
4838 write_insn
<big_endian
>(p
, blr
);
4842 template<bool big_endian
>
4843 static unsigned char*
4844 savegpr1(unsigned char* p
, int r
)
4846 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4847 write_insn
<big_endian
>(p
, insn
);
4851 template<bool big_endian
>
4852 static unsigned char*
4853 savegpr1_tail(unsigned char* p
, int r
)
4855 p
= savegpr1
<big_endian
>(p
, r
);
4856 write_insn
<big_endian
>(p
, blr
);
4860 template<bool big_endian
>
4861 static unsigned char*
4862 restgpr1(unsigned char* p
, int r
)
4864 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4865 write_insn
<big_endian
>(p
, insn
);
4869 template<bool big_endian
>
4870 static unsigned char*
4871 restgpr1_tail(unsigned char* p
, int r
)
4873 p
= restgpr1
<big_endian
>(p
, r
);
4874 write_insn
<big_endian
>(p
, blr
);
4878 template<bool big_endian
>
4879 static unsigned char*
4880 savefpr(unsigned char* p
, int r
)
4882 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4883 write_insn
<big_endian
>(p
, insn
);
4887 template<bool big_endian
>
4888 static unsigned char*
4889 savefpr0_tail(unsigned char* p
, int r
)
4891 p
= savefpr
<big_endian
>(p
, r
);
4892 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4894 write_insn
<big_endian
>(p
, blr
);
4898 template<bool big_endian
>
4899 static unsigned char*
4900 restfpr(unsigned char* p
, int r
)
4902 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4903 write_insn
<big_endian
>(p
, insn
);
4907 template<bool big_endian
>
4908 static unsigned char*
4909 restfpr0_tail(unsigned char* p
, int r
)
4911 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4913 p
= restfpr
<big_endian
>(p
, r
);
4914 write_insn
<big_endian
>(p
, mtlr_0
);
4918 p
= restfpr
<big_endian
>(p
, 30);
4919 p
= restfpr
<big_endian
>(p
, 31);
4921 write_insn
<big_endian
>(p
, blr
);
4925 template<bool big_endian
>
4926 static unsigned char*
4927 savefpr1_tail(unsigned char* p
, int r
)
4929 p
= savefpr
<big_endian
>(p
, r
);
4930 write_insn
<big_endian
>(p
, blr
);
4934 template<bool big_endian
>
4935 static unsigned char*
4936 restfpr1_tail(unsigned char* p
, int r
)
4938 p
= restfpr
<big_endian
>(p
, r
);
4939 write_insn
<big_endian
>(p
, blr
);
4943 template<bool big_endian
>
4944 static unsigned char*
4945 savevr(unsigned char* p
, int r
)
4947 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4948 write_insn
<big_endian
>(p
, insn
);
4950 insn
= stvx_0_12_0
+ (r
<< 21);
4951 write_insn
<big_endian
>(p
, insn
);
4955 template<bool big_endian
>
4956 static unsigned char*
4957 savevr_tail(unsigned char* p
, int r
)
4959 p
= savevr
<big_endian
>(p
, r
);
4960 write_insn
<big_endian
>(p
, blr
);
4964 template<bool big_endian
>
4965 static unsigned char*
4966 restvr(unsigned char* p
, int r
)
4968 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4969 write_insn
<big_endian
>(p
, insn
);
4971 insn
= lvx_0_12_0
+ (r
<< 21);
4972 write_insn
<big_endian
>(p
, insn
);
4976 template<bool big_endian
>
4977 static unsigned char*
4978 restvr_tail(unsigned char* p
, int r
)
4980 p
= restvr
<big_endian
>(p
, r
);
4981 write_insn
<big_endian
>(p
, blr
);
4986 template<int size
, bool big_endian
>
4987 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
4988 Symbol_table
* symtab
)
4989 : Output_section_data_build(4),
4992 this->savres_define(symtab
,
4993 "_savegpr0_", 14, 31,
4994 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
4995 this->savres_define(symtab
,
4996 "_restgpr0_", 14, 29,
4997 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4998 this->savres_define(symtab
,
4999 "_restgpr0_", 30, 31,
5000 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
5001 this->savres_define(symtab
,
5002 "_savegpr1_", 14, 31,
5003 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
5004 this->savres_define(symtab
,
5005 "_restgpr1_", 14, 31,
5006 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
5007 this->savres_define(symtab
,
5008 "_savefpr_", 14, 31,
5009 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
5010 this->savres_define(symtab
,
5011 "_restfpr_", 14, 29,
5012 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5013 this->savres_define(symtab
,
5014 "_restfpr_", 30, 31,
5015 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
5016 this->savres_define(symtab
,
5018 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
5019 this->savres_define(symtab
,
5021 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
5022 this->savres_define(symtab
,
5024 savevr
<big_endian
>, savevr_tail
<big_endian
>);
5025 this->savres_define(symtab
,
5027 restvr
<big_endian
>, restvr_tail
<big_endian
>);
5030 template<int size
, bool big_endian
>
5032 Output_data_save_res
<size
, big_endian
>::savres_define(
5033 Symbol_table
* symtab
,
5035 unsigned int lo
, unsigned int hi
,
5036 unsigned char* write_ent(unsigned char*, int),
5037 unsigned char* write_tail(unsigned char*, int))
5039 size_t len
= strlen(name
);
5040 bool writing
= false;
5043 memcpy(sym
, name
, len
);
5046 for (unsigned int i
= lo
; i
<= hi
; i
++)
5048 sym
[len
+ 0] = i
/ 10 + '0';
5049 sym
[len
+ 1] = i
% 10 + '0';
5050 Symbol
* gsym
= symtab
->lookup(sym
);
5051 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
5052 writing
= writing
|| refd
;
5055 if (this->contents_
== NULL
)
5056 this->contents_
= new unsigned char[this->savres_max
];
5058 section_size_type value
= this->current_data_size();
5059 unsigned char* p
= this->contents_
+ value
;
5061 p
= write_ent(p
, i
);
5063 p
= write_tail(p
, i
);
5064 section_size_type cur_size
= p
- this->contents_
;
5065 this->set_current_data_size(cur_size
);
5067 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
5068 this, value
, cur_size
- value
,
5069 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
5070 elfcpp::STV_HIDDEN
, 0, false, false);
5075 // Write out save/restore.
5077 template<int size
, bool big_endian
>
5079 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
5081 const section_size_type off
= this->offset();
5082 const section_size_type oview_size
=
5083 convert_to_section_size_type(this->data_size());
5084 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
5085 memcpy(oview
, this->contents_
, oview_size
);
5086 of
->write_output_view(off
, oview_size
, oview
);
5090 // Create the glink section.
5092 template<int size
, bool big_endian
>
5094 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
5096 if (this->glink_
== NULL
)
5098 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
5099 this->glink_
->add_eh_frame(layout
);
5100 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5101 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5102 this->glink_
, ORDER_TEXT
, false);
5106 // Create a PLT entry for a global symbol.
5108 template<int size
, bool big_endian
>
5110 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
5114 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
5115 && gsym
->can_use_relative_reloc(false))
5117 if (this->iplt_
== NULL
)
5118 this->make_iplt_section(symtab
, layout
);
5119 this->iplt_
->add_ifunc_entry(gsym
);
5123 if (this->plt_
== NULL
)
5124 this->make_plt_section(symtab
, layout
);
5125 this->plt_
->add_entry(gsym
);
5129 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
5131 template<int size
, bool big_endian
>
5133 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
5134 Symbol_table
* symtab
,
5136 Sized_relobj_file
<size
, big_endian
>* relobj
,
5139 if (this->iplt_
== NULL
)
5140 this->make_iplt_section(symtab
, layout
);
5141 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
5144 // Return the number of entries in the PLT.
5146 template<int size
, bool big_endian
>
5148 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
5150 if (this->plt_
== NULL
)
5152 return this->plt_
->entry_count();
5155 // Create a GOT entry for local dynamic __tls_get_addr calls.
5157 template<int size
, bool big_endian
>
5159 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
5160 Symbol_table
* symtab
,
5162 Sized_relobj_file
<size
, big_endian
>* object
)
5164 if (this->tlsld_got_offset_
== -1U)
5166 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
5167 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
5168 Output_data_got_powerpc
<size
, big_endian
>* got
5169 = this->got_section(symtab
, layout
);
5170 unsigned int got_offset
= got
->add_constant_pair(0, 0);
5171 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
5173 this->tlsld_got_offset_
= got_offset
;
5175 return this->tlsld_got_offset_
;
5178 // Get the Reference_flags for a particular relocation.
5180 template<int size
, bool big_endian
>
5182 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(
5183 unsigned int r_type
,
5184 const Target_powerpc
* target
)
5190 case elfcpp::R_POWERPC_NONE
:
5191 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5192 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5193 case elfcpp::R_PPC64_TOC
:
5194 // No symbol reference.
5197 case elfcpp::R_PPC64_ADDR64
:
5198 case elfcpp::R_PPC64_UADDR64
:
5199 case elfcpp::R_POWERPC_ADDR32
:
5200 case elfcpp::R_POWERPC_UADDR32
:
5201 case elfcpp::R_POWERPC_ADDR16
:
5202 case elfcpp::R_POWERPC_UADDR16
:
5203 case elfcpp::R_POWERPC_ADDR16_LO
:
5204 case elfcpp::R_POWERPC_ADDR16_HI
:
5205 case elfcpp::R_POWERPC_ADDR16_HA
:
5206 ref
= Symbol::ABSOLUTE_REF
;
5209 case elfcpp::R_POWERPC_ADDR24
:
5210 case elfcpp::R_POWERPC_ADDR14
:
5211 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5212 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5213 ref
= Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
5216 case elfcpp::R_PPC64_REL64
:
5217 case elfcpp::R_POWERPC_REL32
:
5218 case elfcpp::R_PPC_LOCAL24PC
:
5219 case elfcpp::R_POWERPC_REL16
:
5220 case elfcpp::R_POWERPC_REL16_LO
:
5221 case elfcpp::R_POWERPC_REL16_HI
:
5222 case elfcpp::R_POWERPC_REL16_HA
:
5223 ref
= Symbol::RELATIVE_REF
;
5226 case elfcpp::R_POWERPC_REL24
:
5227 case elfcpp::R_PPC_PLTREL24
:
5228 case elfcpp::R_POWERPC_REL14
:
5229 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5230 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5231 ref
= Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
5234 case elfcpp::R_POWERPC_GOT16
:
5235 case elfcpp::R_POWERPC_GOT16_LO
:
5236 case elfcpp::R_POWERPC_GOT16_HI
:
5237 case elfcpp::R_POWERPC_GOT16_HA
:
5238 case elfcpp::R_PPC64_GOT16_DS
:
5239 case elfcpp::R_PPC64_GOT16_LO_DS
:
5240 case elfcpp::R_PPC64_TOC16
:
5241 case elfcpp::R_PPC64_TOC16_LO
:
5242 case elfcpp::R_PPC64_TOC16_HI
:
5243 case elfcpp::R_PPC64_TOC16_HA
:
5244 case elfcpp::R_PPC64_TOC16_DS
:
5245 case elfcpp::R_PPC64_TOC16_LO_DS
:
5247 ref
= Symbol::ABSOLUTE_REF
;
5250 case elfcpp::R_POWERPC_GOT_TPREL16
:
5251 case elfcpp::R_POWERPC_TLS
:
5252 ref
= Symbol::TLS_REF
;
5255 case elfcpp::R_POWERPC_COPY
:
5256 case elfcpp::R_POWERPC_GLOB_DAT
:
5257 case elfcpp::R_POWERPC_JMP_SLOT
:
5258 case elfcpp::R_POWERPC_RELATIVE
:
5259 case elfcpp::R_POWERPC_DTPMOD
:
5261 // Not expected. We will give an error later.
5265 if (size
== 64 && target
->abiversion() < 2)
5266 ref
|= Symbol::FUNC_DESC_ABI
;
5270 // Report an unsupported relocation against a local symbol.
5272 template<int size
, bool big_endian
>
5274 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
5275 Sized_relobj_file
<size
, big_endian
>* object
,
5276 unsigned int r_type
)
5278 gold_error(_("%s: unsupported reloc %u against local symbol"),
5279 object
->name().c_str(), r_type
);
5282 // We are about to emit a dynamic relocation of type R_TYPE. If the
5283 // dynamic linker does not support it, issue an error.
5285 template<int size
, bool big_endian
>
5287 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
5288 unsigned int r_type
)
5290 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
5292 // These are the relocation types supported by glibc for both 32-bit
5293 // and 64-bit powerpc.
5296 case elfcpp::R_POWERPC_NONE
:
5297 case elfcpp::R_POWERPC_RELATIVE
:
5298 case elfcpp::R_POWERPC_GLOB_DAT
:
5299 case elfcpp::R_POWERPC_DTPMOD
:
5300 case elfcpp::R_POWERPC_DTPREL
:
5301 case elfcpp::R_POWERPC_TPREL
:
5302 case elfcpp::R_POWERPC_JMP_SLOT
:
5303 case elfcpp::R_POWERPC_COPY
:
5304 case elfcpp::R_POWERPC_IRELATIVE
:
5305 case elfcpp::R_POWERPC_ADDR32
:
5306 case elfcpp::R_POWERPC_UADDR32
:
5307 case elfcpp::R_POWERPC_ADDR24
:
5308 case elfcpp::R_POWERPC_ADDR16
:
5309 case elfcpp::R_POWERPC_UADDR16
:
5310 case elfcpp::R_POWERPC_ADDR16_LO
:
5311 case elfcpp::R_POWERPC_ADDR16_HI
:
5312 case elfcpp::R_POWERPC_ADDR16_HA
:
5313 case elfcpp::R_POWERPC_ADDR14
:
5314 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5315 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5316 case elfcpp::R_POWERPC_REL32
:
5317 case elfcpp::R_POWERPC_REL24
:
5318 case elfcpp::R_POWERPC_TPREL16
:
5319 case elfcpp::R_POWERPC_TPREL16_LO
:
5320 case elfcpp::R_POWERPC_TPREL16_HI
:
5321 case elfcpp::R_POWERPC_TPREL16_HA
:
5332 // These are the relocation types supported only on 64-bit.
5333 case elfcpp::R_PPC64_ADDR64
:
5334 case elfcpp::R_PPC64_UADDR64
:
5335 case elfcpp::R_PPC64_JMP_IREL
:
5336 case elfcpp::R_PPC64_ADDR16_DS
:
5337 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5338 case elfcpp::R_PPC64_ADDR16_HIGH
:
5339 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5340 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5341 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5342 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5343 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5344 case elfcpp::R_PPC64_REL64
:
5345 case elfcpp::R_POWERPC_ADDR30
:
5346 case elfcpp::R_PPC64_TPREL16_DS
:
5347 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5348 case elfcpp::R_PPC64_TPREL16_HIGH
:
5349 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5350 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5351 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5352 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5353 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5364 // These are the relocation types supported only on 32-bit.
5365 // ??? glibc ld.so doesn't need to support these.
5366 case elfcpp::R_POWERPC_DTPREL16
:
5367 case elfcpp::R_POWERPC_DTPREL16_LO
:
5368 case elfcpp::R_POWERPC_DTPREL16_HI
:
5369 case elfcpp::R_POWERPC_DTPREL16_HA
:
5377 // This prevents us from issuing more than one error per reloc
5378 // section. But we can still wind up issuing more than one
5379 // error per object file.
5380 if (this->issued_non_pic_error_
)
5382 gold_assert(parameters
->options().output_is_position_independent());
5383 object
->error(_("requires unsupported dynamic reloc; "
5384 "recompile with -fPIC"));
5385 this->issued_non_pic_error_
= true;
5389 // Return whether we need to make a PLT entry for a relocation of the
5390 // given type against a STT_GNU_IFUNC symbol.
5392 template<int size
, bool big_endian
>
5394 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
5395 Target_powerpc
<size
, big_endian
>* target
,
5396 Sized_relobj_file
<size
, big_endian
>* object
,
5397 unsigned int r_type
,
5400 // In non-pic code any reference will resolve to the plt call stub
5401 // for the ifunc symbol.
5402 if ((size
== 32 || target
->abiversion() >= 2)
5403 && !parameters
->options().output_is_position_independent())
5408 // Word size refs from data sections are OK, but don't need a PLT entry.
5409 case elfcpp::R_POWERPC_ADDR32
:
5410 case elfcpp::R_POWERPC_UADDR32
:
5415 case elfcpp::R_PPC64_ADDR64
:
5416 case elfcpp::R_PPC64_UADDR64
:
5421 // GOT refs are good, but also don't need a PLT entry.
5422 case elfcpp::R_POWERPC_GOT16
:
5423 case elfcpp::R_POWERPC_GOT16_LO
:
5424 case elfcpp::R_POWERPC_GOT16_HI
:
5425 case elfcpp::R_POWERPC_GOT16_HA
:
5426 case elfcpp::R_PPC64_GOT16_DS
:
5427 case elfcpp::R_PPC64_GOT16_LO_DS
:
5430 // Function calls are good, and these do need a PLT entry.
5431 case elfcpp::R_POWERPC_ADDR24
:
5432 case elfcpp::R_POWERPC_ADDR14
:
5433 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5434 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5435 case elfcpp::R_POWERPC_REL24
:
5436 case elfcpp::R_PPC_PLTREL24
:
5437 case elfcpp::R_POWERPC_REL14
:
5438 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5439 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5446 // Anything else is a problem.
5447 // If we are building a static executable, the libc startup function
5448 // responsible for applying indirect function relocations is going
5449 // to complain about the reloc type.
5450 // If we are building a dynamic executable, we will have a text
5451 // relocation. The dynamic loader will set the text segment
5452 // writable and non-executable to apply text relocations. So we'll
5453 // segfault when trying to run the indirection function to resolve
5456 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
5457 object
->name().c_str(), r_type
);
5461 // Scan a relocation for a local symbol.
5463 template<int size
, bool big_endian
>
5465 Target_powerpc
<size
, big_endian
>::Scan::local(
5466 Symbol_table
* symtab
,
5468 Target_powerpc
<size
, big_endian
>* target
,
5469 Sized_relobj_file
<size
, big_endian
>* object
,
5470 unsigned int data_shndx
,
5471 Output_section
* output_section
,
5472 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5473 unsigned int r_type
,
5474 const elfcpp::Sym
<size
, big_endian
>& lsym
,
5477 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
5479 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5480 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5482 this->expect_tls_get_addr_call();
5483 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5484 if (tls_type
!= tls::TLSOPT_NONE
)
5485 this->skip_next_tls_get_addr_call();
5487 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5488 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5490 this->expect_tls_get_addr_call();
5491 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5492 if (tls_type
!= tls::TLSOPT_NONE
)
5493 this->skip_next_tls_get_addr_call();
5496 Powerpc_relobj
<size
, big_endian
>* ppc_object
5497 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5502 && data_shndx
== ppc_object
->opd_shndx()
5503 && r_type
== elfcpp::R_PPC64_ADDR64
)
5504 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5508 // A local STT_GNU_IFUNC symbol may require a PLT entry.
5509 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
5510 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5512 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5513 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5514 r_type
, r_sym
, reloc
.get_r_addend());
5515 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5520 case elfcpp::R_POWERPC_NONE
:
5521 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5522 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5523 case elfcpp::R_PPC64_TOCSAVE
:
5524 case elfcpp::R_POWERPC_TLS
:
5527 case elfcpp::R_PPC64_TOC
:
5529 Output_data_got_powerpc
<size
, big_endian
>* got
5530 = target
->got_section(symtab
, layout
);
5531 if (parameters
->options().output_is_position_independent())
5533 Address off
= reloc
.get_r_offset();
5535 && target
->abiversion() < 2
5536 && data_shndx
== ppc_object
->opd_shndx()
5537 && ppc_object
->get_opd_discard(off
- 8))
5540 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5541 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5542 rela_dyn
->add_output_section_relative(got
->output_section(),
5543 elfcpp::R_POWERPC_RELATIVE
,
5545 object
, data_shndx
, off
,
5546 symobj
->toc_base_offset());
5551 case elfcpp::R_PPC64_ADDR64
:
5552 case elfcpp::R_PPC64_UADDR64
:
5553 case elfcpp::R_POWERPC_ADDR32
:
5554 case elfcpp::R_POWERPC_UADDR32
:
5555 case elfcpp::R_POWERPC_ADDR24
:
5556 case elfcpp::R_POWERPC_ADDR16
:
5557 case elfcpp::R_POWERPC_ADDR16_LO
:
5558 case elfcpp::R_POWERPC_ADDR16_HI
:
5559 case elfcpp::R_POWERPC_ADDR16_HA
:
5560 case elfcpp::R_POWERPC_UADDR16
:
5561 case elfcpp::R_PPC64_ADDR16_HIGH
:
5562 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5563 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5564 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5565 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5566 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5567 case elfcpp::R_PPC64_ADDR16_DS
:
5568 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5569 case elfcpp::R_POWERPC_ADDR14
:
5570 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5571 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5572 // If building a shared library (or a position-independent
5573 // executable), we need to create a dynamic relocation for
5575 if (parameters
->options().output_is_position_independent()
5576 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5578 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5580 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5581 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5582 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5584 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5585 : elfcpp::R_POWERPC_RELATIVE
);
5586 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5587 output_section
, data_shndx
,
5588 reloc
.get_r_offset(),
5589 reloc
.get_r_addend(), false);
5591 else if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
5593 check_non_pic(object
, r_type
);
5594 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5595 data_shndx
, reloc
.get_r_offset(),
5596 reloc
.get_r_addend());
5600 gold_assert(lsym
.get_st_value() == 0);
5601 unsigned int shndx
= lsym
.get_st_shndx();
5603 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
5606 object
->error(_("section symbol %u has bad shndx %u"),
5609 rela_dyn
->add_local_section(object
, shndx
, r_type
,
5610 output_section
, data_shndx
,
5611 reloc
.get_r_offset());
5616 case elfcpp::R_POWERPC_REL24
:
5617 case elfcpp::R_PPC_PLTREL24
:
5618 case elfcpp::R_PPC_LOCAL24PC
:
5619 case elfcpp::R_POWERPC_REL14
:
5620 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5621 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5623 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5624 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5625 reloc
.get_r_addend());
5628 case elfcpp::R_PPC64_REL64
:
5629 case elfcpp::R_POWERPC_REL32
:
5630 case elfcpp::R_POWERPC_REL16
:
5631 case elfcpp::R_POWERPC_REL16_LO
:
5632 case elfcpp::R_POWERPC_REL16_HI
:
5633 case elfcpp::R_POWERPC_REL16_HA
:
5634 case elfcpp::R_POWERPC_SECTOFF
:
5635 case elfcpp::R_POWERPC_SECTOFF_LO
:
5636 case elfcpp::R_POWERPC_SECTOFF_HI
:
5637 case elfcpp::R_POWERPC_SECTOFF_HA
:
5638 case elfcpp::R_PPC64_SECTOFF_DS
:
5639 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5640 case elfcpp::R_POWERPC_TPREL16
:
5641 case elfcpp::R_POWERPC_TPREL16_LO
:
5642 case elfcpp::R_POWERPC_TPREL16_HI
:
5643 case elfcpp::R_POWERPC_TPREL16_HA
:
5644 case elfcpp::R_PPC64_TPREL16_DS
:
5645 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5646 case elfcpp::R_PPC64_TPREL16_HIGH
:
5647 case elfcpp::R_PPC64_TPREL16_HIGHA
:
5648 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5649 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5650 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5651 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5652 case elfcpp::R_POWERPC_DTPREL16
:
5653 case elfcpp::R_POWERPC_DTPREL16_LO
:
5654 case elfcpp::R_POWERPC_DTPREL16_HI
:
5655 case elfcpp::R_POWERPC_DTPREL16_HA
:
5656 case elfcpp::R_PPC64_DTPREL16_DS
:
5657 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5658 case elfcpp::R_PPC64_DTPREL16_HIGH
:
5659 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
5660 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5661 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5662 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5663 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5664 case elfcpp::R_PPC64_TLSGD
:
5665 case elfcpp::R_PPC64_TLSLD
:
5666 case elfcpp::R_PPC64_ADDR64_LOCAL
:
5669 case elfcpp::R_POWERPC_GOT16
:
5670 case elfcpp::R_POWERPC_GOT16_LO
:
5671 case elfcpp::R_POWERPC_GOT16_HI
:
5672 case elfcpp::R_POWERPC_GOT16_HA
:
5673 case elfcpp::R_PPC64_GOT16_DS
:
5674 case elfcpp::R_PPC64_GOT16_LO_DS
:
5676 // The symbol requires a GOT entry.
5677 Output_data_got_powerpc
<size
, big_endian
>* got
5678 = target
->got_section(symtab
, layout
);
5679 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5681 if (!parameters
->options().output_is_position_independent())
5684 && (size
== 32 || target
->abiversion() >= 2))
5685 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5687 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5689 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5691 // If we are generating a shared object or a pie, this
5692 // symbol's GOT entry will be set by a dynamic relocation.
5694 off
= got
->add_constant(0);
5695 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5697 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5699 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5700 : elfcpp::R_POWERPC_RELATIVE
);
5701 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5702 got
, off
, 0, false);
5707 case elfcpp::R_PPC64_TOC16
:
5708 case elfcpp::R_PPC64_TOC16_LO
:
5709 case elfcpp::R_PPC64_TOC16_HI
:
5710 case elfcpp::R_PPC64_TOC16_HA
:
5711 case elfcpp::R_PPC64_TOC16_DS
:
5712 case elfcpp::R_PPC64_TOC16_LO_DS
:
5713 // We need a GOT section.
5714 target
->got_section(symtab
, layout
);
5717 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5718 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5719 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5720 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5722 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5723 if (tls_type
== tls::TLSOPT_NONE
)
5725 Output_data_got_powerpc
<size
, big_endian
>* got
5726 = target
->got_section(symtab
, layout
);
5727 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5728 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5729 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5730 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5732 else if (tls_type
== tls::TLSOPT_TO_LE
)
5734 // no GOT relocs needed for Local Exec.
5741 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5742 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5743 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5744 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5746 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5747 if (tls_type
== tls::TLSOPT_NONE
)
5748 target
->tlsld_got_offset(symtab
, layout
, object
);
5749 else if (tls_type
== tls::TLSOPT_TO_LE
)
5751 // no GOT relocs needed for Local Exec.
5752 if (parameters
->options().emit_relocs())
5754 Output_section
* os
= layout
->tls_segment()->first_section();
5755 gold_assert(os
!= NULL
);
5756 os
->set_needs_symtab_index();
5764 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5765 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5766 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5767 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5769 Output_data_got_powerpc
<size
, big_endian
>* got
5770 = target
->got_section(symtab
, layout
);
5771 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5772 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5776 case elfcpp::R_POWERPC_GOT_TPREL16
:
5777 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5778 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5779 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5781 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5782 if (tls_type
== tls::TLSOPT_NONE
)
5784 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5785 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5787 Output_data_got_powerpc
<size
, big_endian
>* got
5788 = target
->got_section(symtab
, layout
);
5789 unsigned int off
= got
->add_constant(0);
5790 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5792 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5793 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5794 elfcpp::R_POWERPC_TPREL
,
5798 else if (tls_type
== tls::TLSOPT_TO_LE
)
5800 // no GOT relocs needed for Local Exec.
5808 unsupported_reloc_local(object
, r_type
);
5814 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5815 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5816 case elfcpp::R_POWERPC_GOT_TPREL16
:
5817 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5818 case elfcpp::R_POWERPC_GOT16
:
5819 case elfcpp::R_PPC64_GOT16_DS
:
5820 case elfcpp::R_PPC64_TOC16
:
5821 case elfcpp::R_PPC64_TOC16_DS
:
5822 ppc_object
->set_has_small_toc_reloc();
5828 // Report an unsupported relocation against a global symbol.
5830 template<int size
, bool big_endian
>
5832 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5833 Sized_relobj_file
<size
, big_endian
>* object
,
5834 unsigned int r_type
,
5837 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5838 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5841 // Scan a relocation for a global symbol.
5843 template<int size
, bool big_endian
>
5845 Target_powerpc
<size
, big_endian
>::Scan::global(
5846 Symbol_table
* symtab
,
5848 Target_powerpc
<size
, big_endian
>* target
,
5849 Sized_relobj_file
<size
, big_endian
>* object
,
5850 unsigned int data_shndx
,
5851 Output_section
* output_section
,
5852 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5853 unsigned int r_type
,
5856 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5859 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5860 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5862 this->expect_tls_get_addr_call();
5863 const bool final
= gsym
->final_value_is_known();
5864 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5865 if (tls_type
!= tls::TLSOPT_NONE
)
5866 this->skip_next_tls_get_addr_call();
5868 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5869 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5871 this->expect_tls_get_addr_call();
5872 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5873 if (tls_type
!= tls::TLSOPT_NONE
)
5874 this->skip_next_tls_get_addr_call();
5877 Powerpc_relobj
<size
, big_endian
>* ppc_object
5878 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5880 // A STT_GNU_IFUNC symbol may require a PLT entry.
5881 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5882 bool pushed_ifunc
= false;
5883 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(target
, object
, r_type
, true))
5885 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5886 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5887 reloc
.get_r_addend());
5888 target
->make_plt_entry(symtab
, layout
, gsym
);
5889 pushed_ifunc
= true;
5894 case elfcpp::R_POWERPC_NONE
:
5895 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5896 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5897 case elfcpp::R_PPC_LOCAL24PC
:
5898 case elfcpp::R_POWERPC_TLS
:
5901 case elfcpp::R_PPC64_TOC
:
5903 Output_data_got_powerpc
<size
, big_endian
>* got
5904 = target
->got_section(symtab
, layout
);
5905 if (parameters
->options().output_is_position_independent())
5907 Address off
= reloc
.get_r_offset();
5909 && data_shndx
== ppc_object
->opd_shndx()
5910 && ppc_object
->get_opd_discard(off
- 8))
5913 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5914 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5915 if (data_shndx
!= ppc_object
->opd_shndx())
5916 symobj
= static_cast
5917 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5918 rela_dyn
->add_output_section_relative(got
->output_section(),
5919 elfcpp::R_POWERPC_RELATIVE
,
5921 object
, data_shndx
, off
,
5922 symobj
->toc_base_offset());
5927 case elfcpp::R_PPC64_ADDR64
:
5929 && target
->abiversion() < 2
5930 && data_shndx
== ppc_object
->opd_shndx()
5931 && (gsym
->is_defined_in_discarded_section()
5932 || gsym
->object() != object
))
5934 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5938 case elfcpp::R_PPC64_UADDR64
:
5939 case elfcpp::R_POWERPC_ADDR32
:
5940 case elfcpp::R_POWERPC_UADDR32
:
5941 case elfcpp::R_POWERPC_ADDR24
:
5942 case elfcpp::R_POWERPC_ADDR16
:
5943 case elfcpp::R_POWERPC_ADDR16_LO
:
5944 case elfcpp::R_POWERPC_ADDR16_HI
:
5945 case elfcpp::R_POWERPC_ADDR16_HA
:
5946 case elfcpp::R_POWERPC_UADDR16
:
5947 case elfcpp::R_PPC64_ADDR16_HIGH
:
5948 case elfcpp::R_PPC64_ADDR16_HIGHA
:
5949 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5950 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5951 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5952 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5953 case elfcpp::R_PPC64_ADDR16_DS
:
5954 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5955 case elfcpp::R_POWERPC_ADDR14
:
5956 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5957 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5959 // Make a PLT entry if necessary.
5960 if (gsym
->needs_plt_entry())
5962 // Since this is not a PC-relative relocation, we may be
5963 // taking the address of a function. In that case we need to
5964 // set the entry in the dynamic symbol table to the address of
5965 // the PLT call stub.
5966 bool need_ifunc_plt
= false;
5967 if ((size
== 32 || target
->abiversion() >= 2)
5968 && gsym
->is_from_dynobj()
5969 && !parameters
->options().output_is_position_independent())
5971 gsym
->set_needs_dynsym_value();
5972 need_ifunc_plt
= true;
5974 if (!is_ifunc
|| (!pushed_ifunc
&& need_ifunc_plt
))
5976 target
->push_branch(ppc_object
, data_shndx
,
5977 reloc
.get_r_offset(), r_type
,
5978 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5979 reloc
.get_r_addend());
5980 target
->make_plt_entry(symtab
, layout
, gsym
);
5983 // Make a dynamic relocation if necessary.
5984 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
))
5985 || (size
== 64 && is_ifunc
&& target
->abiversion() < 2))
5987 if (!parameters
->options().output_is_position_independent()
5988 && gsym
->may_need_copy_reloc())
5990 target
->copy_reloc(symtab
, layout
, object
,
5991 data_shndx
, output_section
, gsym
, reloc
);
5993 else if ((((size
== 32
5994 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5996 && r_type
== elfcpp::R_PPC64_ADDR64
5997 && target
->abiversion() >= 2))
5998 && gsym
->can_use_relative_reloc(false)
5999 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
6000 && parameters
->options().shared()))
6002 && r_type
== elfcpp::R_PPC64_ADDR64
6003 && target
->abiversion() < 2
6004 && (gsym
->can_use_relative_reloc(false)
6005 || data_shndx
== ppc_object
->opd_shndx())))
6007 Reloc_section
* rela_dyn
6008 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6009 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6010 : elfcpp::R_POWERPC_RELATIVE
);
6011 rela_dyn
->add_symbolless_global_addend(
6012 gsym
, dynrel
, output_section
, object
, data_shndx
,
6013 reloc
.get_r_offset(), reloc
.get_r_addend());
6017 Reloc_section
* rela_dyn
6018 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6019 check_non_pic(object
, r_type
);
6020 rela_dyn
->add_global(gsym
, r_type
, output_section
,
6022 reloc
.get_r_offset(),
6023 reloc
.get_r_addend());
6029 case elfcpp::R_PPC_PLTREL24
:
6030 case elfcpp::R_POWERPC_REL24
:
6033 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6035 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6036 reloc
.get_r_addend());
6037 if (gsym
->needs_plt_entry()
6038 || (!gsym
->final_value_is_known()
6039 && (gsym
->is_undefined()
6040 || gsym
->is_from_dynobj()
6041 || gsym
->is_preemptible())))
6042 target
->make_plt_entry(symtab
, layout
, gsym
);
6046 case elfcpp::R_PPC64_REL64
:
6047 case elfcpp::R_POWERPC_REL32
:
6048 // Make a dynamic relocation if necessary.
6049 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
, target
)))
6051 if (!parameters
->options().output_is_position_independent()
6052 && gsym
->may_need_copy_reloc())
6054 target
->copy_reloc(symtab
, layout
, object
,
6055 data_shndx
, output_section
, gsym
,
6060 Reloc_section
* rela_dyn
6061 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6062 check_non_pic(object
, r_type
);
6063 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
6064 data_shndx
, reloc
.get_r_offset(),
6065 reloc
.get_r_addend());
6070 case elfcpp::R_POWERPC_REL14
:
6071 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6072 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6074 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
6075 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
6076 reloc
.get_r_addend());
6079 case elfcpp::R_POWERPC_REL16
:
6080 case elfcpp::R_POWERPC_REL16_LO
:
6081 case elfcpp::R_POWERPC_REL16_HI
:
6082 case elfcpp::R_POWERPC_REL16_HA
:
6083 case elfcpp::R_POWERPC_SECTOFF
:
6084 case elfcpp::R_POWERPC_SECTOFF_LO
:
6085 case elfcpp::R_POWERPC_SECTOFF_HI
:
6086 case elfcpp::R_POWERPC_SECTOFF_HA
:
6087 case elfcpp::R_PPC64_SECTOFF_DS
:
6088 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6089 case elfcpp::R_POWERPC_TPREL16
:
6090 case elfcpp::R_POWERPC_TPREL16_LO
:
6091 case elfcpp::R_POWERPC_TPREL16_HI
:
6092 case elfcpp::R_POWERPC_TPREL16_HA
:
6093 case elfcpp::R_PPC64_TPREL16_DS
:
6094 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6095 case elfcpp::R_PPC64_TPREL16_HIGH
:
6096 case elfcpp::R_PPC64_TPREL16_HIGHA
:
6097 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6098 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6099 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6100 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6101 case elfcpp::R_POWERPC_DTPREL16
:
6102 case elfcpp::R_POWERPC_DTPREL16_LO
:
6103 case elfcpp::R_POWERPC_DTPREL16_HI
:
6104 case elfcpp::R_POWERPC_DTPREL16_HA
:
6105 case elfcpp::R_PPC64_DTPREL16_DS
:
6106 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6107 case elfcpp::R_PPC64_DTPREL16_HIGH
:
6108 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
6109 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6110 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6111 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6112 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6113 case elfcpp::R_PPC64_TLSGD
:
6114 case elfcpp::R_PPC64_TLSLD
:
6115 case elfcpp::R_PPC64_ADDR64_LOCAL
:
6118 case elfcpp::R_POWERPC_GOT16
:
6119 case elfcpp::R_POWERPC_GOT16_LO
:
6120 case elfcpp::R_POWERPC_GOT16_HI
:
6121 case elfcpp::R_POWERPC_GOT16_HA
:
6122 case elfcpp::R_PPC64_GOT16_DS
:
6123 case elfcpp::R_PPC64_GOT16_LO_DS
:
6125 // The symbol requires a GOT entry.
6126 Output_data_got_powerpc
<size
, big_endian
>* got
;
6128 got
= target
->got_section(symtab
, layout
);
6129 if (gsym
->final_value_is_known())
6132 && (size
== 32 || target
->abiversion() >= 2))
6133 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
6135 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
6137 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
6139 // If we are generating a shared object or a pie, this
6140 // symbol's GOT entry will be set by a dynamic relocation.
6141 unsigned int off
= got
->add_constant(0);
6142 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
6144 Reloc_section
* rela_dyn
6145 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
6147 if (gsym
->can_use_relative_reloc(false)
6149 || target
->abiversion() >= 2)
6150 && gsym
->visibility() == elfcpp::STV_PROTECTED
6151 && parameters
->options().shared()))
6153 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
6154 : elfcpp::R_POWERPC_RELATIVE
);
6155 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
6159 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
6160 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
6166 case elfcpp::R_PPC64_TOC16
:
6167 case elfcpp::R_PPC64_TOC16_LO
:
6168 case elfcpp::R_PPC64_TOC16_HI
:
6169 case elfcpp::R_PPC64_TOC16_HA
:
6170 case elfcpp::R_PPC64_TOC16_DS
:
6171 case elfcpp::R_PPC64_TOC16_LO_DS
:
6172 // We need a GOT section.
6173 target
->got_section(symtab
, layout
);
6176 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6177 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6178 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6179 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6181 const bool final
= gsym
->final_value_is_known();
6182 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6183 if (tls_type
== tls::TLSOPT_NONE
)
6185 Output_data_got_powerpc
<size
, big_endian
>* got
6186 = target
->got_section(symtab
, layout
);
6187 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6188 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
6189 elfcpp::R_POWERPC_DTPMOD
,
6190 elfcpp::R_POWERPC_DTPREL
);
6192 else if (tls_type
== tls::TLSOPT_TO_IE
)
6194 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6196 Output_data_got_powerpc
<size
, big_endian
>* got
6197 = target
->got_section(symtab
, layout
);
6198 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6199 if (gsym
->is_undefined()
6200 || gsym
->is_from_dynobj())
6202 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6203 elfcpp::R_POWERPC_TPREL
);
6207 unsigned int off
= got
->add_constant(0);
6208 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6209 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6210 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6215 else if (tls_type
== tls::TLSOPT_TO_LE
)
6217 // no GOT relocs needed for Local Exec.
6224 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6225 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6226 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6227 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6229 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6230 if (tls_type
== tls::TLSOPT_NONE
)
6231 target
->tlsld_got_offset(symtab
, layout
, object
);
6232 else if (tls_type
== tls::TLSOPT_TO_LE
)
6234 // no GOT relocs needed for Local Exec.
6235 if (parameters
->options().emit_relocs())
6237 Output_section
* os
= layout
->tls_segment()->first_section();
6238 gold_assert(os
!= NULL
);
6239 os
->set_needs_symtab_index();
6247 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6248 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6249 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6250 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6252 Output_data_got_powerpc
<size
, big_endian
>* got
6253 = target
->got_section(symtab
, layout
);
6254 if (!gsym
->final_value_is_known()
6255 && (gsym
->is_from_dynobj()
6256 || gsym
->is_undefined()
6257 || gsym
->is_preemptible()))
6258 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
6259 target
->rela_dyn_section(layout
),
6260 elfcpp::R_POWERPC_DTPREL
);
6262 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
6266 case elfcpp::R_POWERPC_GOT_TPREL16
:
6267 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6268 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6269 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6271 const bool final
= gsym
->final_value_is_known();
6272 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6273 if (tls_type
== tls::TLSOPT_NONE
)
6275 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
6277 Output_data_got_powerpc
<size
, big_endian
>* got
6278 = target
->got_section(symtab
, layout
);
6279 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
6280 if (gsym
->is_undefined()
6281 || gsym
->is_from_dynobj())
6283 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
6284 elfcpp::R_POWERPC_TPREL
);
6288 unsigned int off
= got
->add_constant(0);
6289 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
6290 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
6291 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
6296 else if (tls_type
== tls::TLSOPT_TO_LE
)
6298 // no GOT relocs needed for Local Exec.
6306 unsupported_reloc_global(object
, r_type
, gsym
);
6312 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6313 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6314 case elfcpp::R_POWERPC_GOT_TPREL16
:
6315 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6316 case elfcpp::R_POWERPC_GOT16
:
6317 case elfcpp::R_PPC64_GOT16_DS
:
6318 case elfcpp::R_PPC64_TOC16
:
6319 case elfcpp::R_PPC64_TOC16_DS
:
6320 ppc_object
->set_has_small_toc_reloc();
6326 // Process relocations for gc.
6328 template<int size
, bool big_endian
>
6330 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
6331 Symbol_table
* symtab
,
6333 Sized_relobj_file
<size
, big_endian
>* object
,
6334 unsigned int data_shndx
,
6336 const unsigned char* prelocs
,
6338 Output_section
* output_section
,
6339 bool needs_special_offset_handling
,
6340 size_t local_symbol_count
,
6341 const unsigned char* plocal_symbols
)
6343 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6344 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6345 Powerpc_relobj
<size
, big_endian
>* ppc_object
6346 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
6348 ppc_object
->set_opd_valid();
6349 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
6351 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
6352 for (p
= ppc_object
->access_from_map()->begin();
6353 p
!= ppc_object
->access_from_map()->end();
6356 Address dst_off
= p
->first
;
6357 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6358 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
6359 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
6361 Relobj
* src_obj
= s
->first
;
6362 unsigned int src_indx
= s
->second
;
6363 symtab
->gc()->add_reference(src_obj
, src_indx
,
6364 ppc_object
, dst_indx
);
6368 ppc_object
->access_from_map()->clear();
6369 ppc_object
->process_gc_mark(symtab
);
6370 // Don't look at .opd relocs as .opd will reference everything.
6374 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
6375 typename
Target_powerpc::Relocatable_size_for_reloc
>(
6384 needs_special_offset_handling
,
6389 // Handle target specific gc actions when adding a gc reference from
6390 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
6391 // and DST_OFF. For powerpc64, this adds a referenc to the code
6392 // section of a function descriptor.
6394 template<int size
, bool big_endian
>
6396 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
6397 Symbol_table
* symtab
,
6399 unsigned int src_shndx
,
6401 unsigned int dst_shndx
,
6402 Address dst_off
) const
6404 if (size
!= 64 || dst_obj
->is_dynamic())
6407 Powerpc_relobj
<size
, big_endian
>* ppc_object
6408 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
6409 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
6411 if (ppc_object
->opd_valid())
6413 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
6414 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
6418 // If we haven't run scan_opd_relocs, we must delay
6419 // processing this function descriptor reference.
6420 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
6425 // Add any special sections for this symbol to the gc work list.
6426 // For powerpc64, this adds the code section of a function
6429 template<int size
, bool big_endian
>
6431 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
6432 Symbol_table
* symtab
,
6437 Powerpc_relobj
<size
, big_endian
>* ppc_object
6438 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
6440 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6441 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
6443 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
6444 Address dst_off
= gsym
->value();
6445 if (ppc_object
->opd_valid())
6447 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
6448 symtab
->gc()->worklist().push_back(Section_id(ppc_object
,
6452 ppc_object
->add_gc_mark(dst_off
);
6457 // For a symbol location in .opd, set LOC to the location of the
6460 template<int size
, bool big_endian
>
6462 Target_powerpc
<size
, big_endian
>::do_function_location(
6463 Symbol_location
* loc
) const
6465 if (size
== 64 && loc
->shndx
!= 0)
6467 if (loc
->object
->is_dynamic())
6469 Powerpc_dynobj
<size
, big_endian
>* ppc_object
6470 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
6471 if (loc
->shndx
== ppc_object
->opd_shndx())
6474 Address off
= loc
->offset
- ppc_object
->opd_address();
6475 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
6476 loc
->offset
= dest_off
;
6481 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6482 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
6483 if (loc
->shndx
== ppc_object
->opd_shndx())
6486 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
6487 loc
->offset
= dest_off
;
6493 // FNOFFSET in section SHNDX in OBJECT is the start of a function
6494 // compiled with -fsplit-stack. The function calls non-split-stack
6495 // code. Change the function to ensure it has enough stack space to
6496 // call some random function.
6498 template<int size
, bool big_endian
>
6500 Target_powerpc
<size
, big_endian
>::do_calls_non_split(
6503 section_offset_type fnoffset
,
6504 section_size_type fnsize
,
6505 unsigned char* view
,
6506 section_size_type view_size
,
6508 std::string
* to
) const
6510 // 32-bit not supported.
6514 Target::do_calls_non_split(object
, shndx
, fnoffset
, fnsize
,
6515 view
, view_size
, from
, to
);
6519 // The function always starts with
6520 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
6521 // addis %r12,%r1,-allocate@ha
6522 // addi %r12,%r12,-allocate@l
6524 // but note that the addis or addi may be replaced with a nop
6526 unsigned char *entry
= view
+ fnoffset
;
6527 uint32_t insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6529 if ((insn
& 0xffff0000) == addis_2_12
)
6531 /* Skip ELFv2 global entry code. */
6533 insn
= elfcpp::Swap
<32, big_endian
>::readval(entry
);
6536 unsigned char *pinsn
= entry
;
6538 const uint32_t ld_private_ss
= 0xe80d8fc0;
6539 if (insn
== ld_private_ss
)
6541 int32_t allocate
= 0;
6545 insn
= elfcpp::Swap
<32, big_endian
>::readval(pinsn
);
6546 if ((insn
& 0xffff0000) == addis_12_1
)
6547 allocate
+= (insn
& 0xffff) << 16;
6548 else if ((insn
& 0xffff0000) == addi_12_1
6549 || (insn
& 0xffff0000) == addi_12_12
)
6550 allocate
+= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
6551 else if (insn
!= nop
)
6554 if (insn
== cmpld_7_12_0
&& pinsn
== entry
+ 12)
6556 int extra
= parameters
->options().split_stack_adjust_size();
6558 if (allocate
>= 0 || extra
< 0)
6560 object
->error(_("split-stack stack size overflow at "
6561 "section %u offset %0zx"),
6562 shndx
, static_cast<size_t>(fnoffset
));
6566 insn
= addis_12_1
| (((allocate
+ 0x8000) >> 16) & 0xffff);
6567 if (insn
!= addis_12_1
)
6569 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6571 insn
= addi_12_12
| (allocate
& 0xffff);
6572 if (insn
!= addi_12_12
)
6574 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6580 insn
= addi_12_1
| (allocate
& 0xffff);
6581 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, insn
);
6584 if (pinsn
!= entry
+ 12)
6585 elfcpp::Swap
<32, big_endian
>::writeval(pinsn
, nop
);
6593 if (!object
->has_no_split_stack())
6594 object
->error(_("failed to match split-stack sequence at "
6595 "section %u offset %0zx"),
6596 shndx
, static_cast<size_t>(fnoffset
));
6600 // Scan relocations for a section.
6602 template<int size
, bool big_endian
>
6604 Target_powerpc
<size
, big_endian
>::scan_relocs(
6605 Symbol_table
* symtab
,
6607 Sized_relobj_file
<size
, big_endian
>* object
,
6608 unsigned int data_shndx
,
6609 unsigned int sh_type
,
6610 const unsigned char* prelocs
,
6612 Output_section
* output_section
,
6613 bool needs_special_offset_handling
,
6614 size_t local_symbol_count
,
6615 const unsigned char* plocal_symbols
)
6617 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6618 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
6620 if (sh_type
== elfcpp::SHT_REL
)
6622 gold_error(_("%s: unsupported REL reloc section"),
6623 object
->name().c_str());
6627 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
6636 needs_special_offset_handling
,
6641 // Functor class for processing the global symbol table.
6642 // Removes symbols defined on discarded opd entries.
6644 template<bool big_endian
>
6645 class Global_symbol_visitor_opd
6648 Global_symbol_visitor_opd()
6652 operator()(Sized_symbol
<64>* sym
)
6654 if (sym
->has_symtab_index()
6655 || sym
->source() != Symbol::FROM_OBJECT
6656 || !sym
->in_real_elf())
6659 if (sym
->object()->is_dynamic())
6662 Powerpc_relobj
<64, big_endian
>* symobj
6663 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
6664 if (symobj
->opd_shndx() == 0)
6668 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6669 if (shndx
== symobj
->opd_shndx()
6670 && symobj
->get_opd_discard(sym
->value()))
6672 sym
->set_undefined();
6673 sym
->set_visibility(elfcpp::STV_DEFAULT
);
6674 sym
->set_is_defined_in_discarded_section();
6675 sym
->set_symtab_index(-1U);
6680 template<int size
, bool big_endian
>
6682 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6684 Symbol_table
* symtab
)
6688 Output_data_save_res
<64, big_endian
>* savres
6689 = new Output_data_save_res
<64, big_endian
>(symtab
);
6690 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6691 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6692 savres
, ORDER_TEXT
, false);
6696 // Sort linker created .got section first (for the header), then input
6697 // sections belonging to files using small model code.
6699 template<bool big_endian
>
6700 class Sort_toc_sections
6704 operator()(const Output_section::Input_section
& is1
,
6705 const Output_section::Input_section
& is2
) const
6707 if (!is1
.is_input_section() && is2
.is_input_section())
6710 = (is1
.is_input_section()
6711 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6712 ->has_small_toc_reloc()));
6714 = (is2
.is_input_section()
6715 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6716 ->has_small_toc_reloc()));
6717 return small1
&& !small2
;
6721 // Finalize the sections.
6723 template<int size
, bool big_endian
>
6725 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6727 const Input_objects
*,
6728 Symbol_table
* symtab
)
6730 if (parameters
->doing_static_link())
6732 // At least some versions of glibc elf-init.o have a strong
6733 // reference to __rela_iplt marker syms. A weak ref would be
6735 if (this->iplt_
!= NULL
)
6737 Reloc_section
* rel
= this->iplt_
->rel_plt();
6738 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6739 Symbol_table::PREDEFINED
, rel
, 0, 0,
6740 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6741 elfcpp::STV_HIDDEN
, 0, false, true);
6742 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6743 Symbol_table::PREDEFINED
, rel
, 0, 0,
6744 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6745 elfcpp::STV_HIDDEN
, 0, true, true);
6749 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6750 Symbol_table::PREDEFINED
, 0, 0,
6751 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6752 elfcpp::STV_HIDDEN
, 0, true, false);
6753 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6754 Symbol_table::PREDEFINED
, 0, 0,
6755 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6756 elfcpp::STV_HIDDEN
, 0, true, false);
6762 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6763 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6765 if (!parameters
->options().relocatable())
6767 this->define_save_restore_funcs(layout
, symtab
);
6769 // Annoyingly, we need to make these sections now whether or
6770 // not we need them. If we delay until do_relax then we
6771 // need to mess with the relaxation machinery checkpointing.
6772 this->got_section(symtab
, layout
);
6773 this->make_brlt_section(layout
);
6775 if (parameters
->options().toc_sort())
6777 Output_section
* os
= this->got_
->output_section();
6778 if (os
!= NULL
&& os
->input_sections().size() > 1)
6779 std::stable_sort(os
->input_sections().begin(),
6780 os
->input_sections().end(),
6781 Sort_toc_sections
<big_endian
>());
6786 // Fill in some more dynamic tags.
6787 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6790 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6792 : this->plt_
->rel_plt());
6793 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6794 this->rela_dyn_
, true, size
== 32);
6798 if (this->got_
!= NULL
)
6800 this->got_
->finalize_data_size();
6801 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6802 this->got_
, this->got_
->g_o_t());
6807 if (this->glink_
!= NULL
)
6809 this->glink_
->finalize_data_size();
6810 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6812 (this->glink_
->pltresolve_size
6818 // Emit any relocs we saved in an attempt to avoid generating COPY
6820 if (this->copy_relocs_
.any_saved_relocs())
6821 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6824 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6828 ok_lo_toc_insn(uint32_t insn
)
6830 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6831 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6832 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6833 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6834 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6835 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6836 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6837 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6838 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6839 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6840 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6841 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6842 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6843 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6844 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6846 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6847 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6848 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6851 // Return the value to use for a branch relocation.
6853 template<int size
, bool big_endian
>
6855 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6856 const Symbol_table
* symtab
,
6857 const Sized_symbol
<size
>* gsym
,
6858 Powerpc_relobj
<size
, big_endian
>* object
,
6860 unsigned int *dest_shndx
)
6862 if (size
== 32 || this->abiversion() >= 2)
6866 // If the symbol is defined in an opd section, ie. is a function
6867 // descriptor, use the function descriptor code entry address
6868 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6870 && gsym
->source() != Symbol::FROM_OBJECT
)
6873 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6874 unsigned int shndx
= symobj
->opd_shndx();
6877 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6878 if (opd_addr
== invalid_address
)
6880 opd_addr
+= symobj
->output_section_address(shndx
);
6881 if (*value
>= opd_addr
&& *value
< opd_addr
+ symobj
->section_size(shndx
))
6884 *dest_shndx
= symobj
->get_opd_ent(*value
- opd_addr
, &sec_off
);
6885 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6888 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6889 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6890 *dest_shndx
= folded
.second
;
6892 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6893 if (sec_addr
== invalid_address
)
6896 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6897 *value
= sec_addr
+ sec_off
;
6902 // Perform a relocation.
6904 template<int size
, bool big_endian
>
6906 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6907 const Relocate_info
<size
, big_endian
>* relinfo
,
6908 Target_powerpc
* target
,
6911 const elfcpp::Rela
<size
, big_endian
>& rela
,
6912 unsigned int r_type
,
6913 const Sized_symbol
<size
>* gsym
,
6914 const Symbol_value
<size
>* psymval
,
6915 unsigned char* view
,
6917 section_size_type view_size
)
6922 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6924 case Track_tls::NOT_EXPECTED
:
6925 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6926 _("__tls_get_addr call lacks marker reloc"));
6928 case Track_tls::EXPECTED
:
6929 // We have already complained.
6931 case Track_tls::SKIP
:
6933 case Track_tls::NORMAL
:
6937 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6938 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6939 Powerpc_relobj
<size
, big_endian
>* const object
6940 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6942 bool has_stub_value
= false;
6943 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6945 ? gsym
->use_plt_offset(Scan::get_reference_flags(r_type
, target
))
6946 : object
->local_has_plt_offset(r_sym
))
6947 && (!psymval
->is_ifunc_symbol()
6948 || Scan::reloc_needs_plt_for_ifunc(target
, object
, r_type
, false)))
6952 && target
->abiversion() >= 2
6953 && !parameters
->options().output_is_position_independent()
6954 && !is_branch_reloc(r_type
))
6956 Address off
= target
->glink_section()->find_global_entry(gsym
);
6957 if (off
!= invalid_address
)
6959 value
= target
->glink_section()->global_entry_address() + off
;
6960 has_stub_value
= true;
6965 Stub_table
<size
, big_endian
>* stub_table
6966 = object
->stub_table(relinfo
->data_shndx
);
6967 if (stub_table
== NULL
)
6969 // This is a ref from a data section to an ifunc symbol.
6970 if (target
->stub_tables().size() != 0)
6971 stub_table
= target
->stub_tables()[0];
6973 if (stub_table
!= NULL
)
6977 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
6978 rela
.get_r_addend());
6980 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
6981 rela
.get_r_addend());
6982 if (off
!= invalid_address
)
6984 value
= stub_table
->stub_address() + off
;
6985 has_stub_value
= true;
6989 // We don't care too much about bogus debug references to
6990 // non-local functions, but otherwise there had better be a plt
6991 // call stub or global entry stub as appropriate.
6992 gold_assert(has_stub_value
|| !(os
->flags() & elfcpp::SHF_ALLOC
));
6995 if (r_type
== elfcpp::R_POWERPC_GOT16
6996 || r_type
== elfcpp::R_POWERPC_GOT16_LO
6997 || r_type
== elfcpp::R_POWERPC_GOT16_HI
6998 || r_type
== elfcpp::R_POWERPC_GOT16_HA
6999 || r_type
== elfcpp::R_PPC64_GOT16_DS
7000 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
7004 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
7005 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
7009 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7010 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
7011 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
7013 value
-= target
->got_section()->got_base_offset(object
);
7015 else if (r_type
== elfcpp::R_PPC64_TOC
)
7017 value
= (target
->got_section()->output_section()->address()
7018 + object
->toc_base_offset());
7020 else if (gsym
!= NULL
7021 && (r_type
== elfcpp::R_POWERPC_REL24
7022 || r_type
== elfcpp::R_PPC_PLTREL24
)
7027 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
7028 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
7029 bool can_plt_call
= false;
7030 if (rela
.get_r_offset() + 8 <= view_size
)
7032 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
7033 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
7036 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
7038 elfcpp::Swap
<32, big_endian
>::
7039 writeval(wv
+ 1, ld_2_1
+ target
->stk_toc());
7040 can_plt_call
= true;
7045 // If we don't have a branch and link followed by a nop,
7046 // we can't go via the plt because there is no place to
7047 // put a toc restoring instruction.
7048 // Unless we know we won't be returning.
7049 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
7050 can_plt_call
= true;
7054 // g++ as of 20130507 emits self-calls without a
7055 // following nop. This is arguably wrong since we have
7056 // conflicting information. On the one hand a global
7057 // symbol and on the other a local call sequence, but
7058 // don't error for this special case.
7059 // It isn't possible to cheaply verify we have exactly
7060 // such a call. Allow all calls to the same section.
7062 Address code
= value
;
7063 if (gsym
->source() == Symbol::FROM_OBJECT
7064 && gsym
->object() == object
)
7066 unsigned int dest_shndx
= 0;
7067 if (target
->abiversion() < 2)
7069 Address addend
= rela
.get_r_addend();
7070 code
= psymval
->value(object
, addend
);
7071 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7072 &code
, &dest_shndx
);
7075 if (dest_shndx
== 0)
7076 dest_shndx
= gsym
->shndx(&is_ordinary
);
7077 ok
= dest_shndx
== relinfo
->data_shndx
;
7081 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7082 _("call lacks nop, can't restore toc; "
7083 "recompile with -fPIC"));
7089 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7090 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7091 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7092 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7094 // First instruction of a global dynamic sequence, arg setup insn.
7095 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7096 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7097 enum Got_type got_type
= GOT_TYPE_STANDARD
;
7098 if (tls_type
== tls::TLSOPT_NONE
)
7099 got_type
= GOT_TYPE_TLSGD
;
7100 else if (tls_type
== tls::TLSOPT_TO_IE
)
7101 got_type
= GOT_TYPE_TPREL
;
7102 if (got_type
!= GOT_TYPE_STANDARD
)
7106 gold_assert(gsym
->has_got_offset(got_type
));
7107 value
= gsym
->got_offset(got_type
);
7111 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7112 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
7113 value
= object
->local_got_offset(r_sym
, got_type
);
7115 value
-= target
->got_section()->got_base_offset(object
);
7117 if (tls_type
== tls::TLSOPT_TO_IE
)
7119 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7120 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7122 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7123 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7124 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
7126 insn
|= 32 << 26; // lwz
7128 insn
|= 58 << 26; // ld
7129 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7131 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7132 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7134 else if (tls_type
== tls::TLSOPT_TO_LE
)
7136 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7137 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7139 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7140 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7141 insn
&= (1 << 26) - (1 << 21); // extract rt
7146 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7147 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7148 value
= psymval
->value(object
, rela
.get_r_addend());
7152 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7154 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7155 r_type
= elfcpp::R_POWERPC_NONE
;
7159 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7160 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7161 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7162 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7164 // First instruction of a local dynamic sequence, arg setup insn.
7165 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7166 if (tls_type
== tls::TLSOPT_NONE
)
7168 value
= target
->tlsld_got_offset();
7169 value
-= target
->got_section()->got_base_offset(object
);
7173 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7174 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7175 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7177 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7178 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7179 insn
&= (1 << 26) - (1 << 21); // extract rt
7184 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7185 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7190 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7192 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7193 r_type
= elfcpp::R_POWERPC_NONE
;
7197 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
7198 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
7199 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
7200 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
7202 // Accesses relative to a local dynamic sequence address,
7203 // no optimisation here.
7206 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
7207 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
7211 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7212 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
7213 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
7215 value
-= target
->got_section()->got_base_offset(object
);
7217 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7218 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7219 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7220 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7222 // First instruction of initial exec sequence.
7223 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7224 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7225 if (tls_type
== tls::TLSOPT_NONE
)
7229 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
7230 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
7234 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
7235 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
7236 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
7238 value
-= target
->got_section()->got_base_offset(object
);
7242 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
7243 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7244 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7246 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7247 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7248 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
7253 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7254 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7255 value
= psymval
->value(object
, rela
.get_r_addend());
7259 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7261 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7262 r_type
= elfcpp::R_POWERPC_NONE
;
7266 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7267 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7269 // Second instruction of a global dynamic sequence,
7270 // the __tls_get_addr call
7271 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7272 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7273 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
7274 if (tls_type
!= tls::TLSOPT_NONE
)
7276 if (tls_type
== tls::TLSOPT_TO_IE
)
7278 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7279 Insn insn
= add_3_3_13
;
7282 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7283 r_type
= elfcpp::R_POWERPC_NONE
;
7287 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7288 Insn insn
= addi_3_3
;
7289 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7290 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7291 view
+= 2 * big_endian
;
7292 value
= psymval
->value(object
, rela
.get_r_addend());
7294 this->skip_next_tls_get_addr_call();
7297 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7298 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7300 // Second instruction of a local dynamic sequence,
7301 // the __tls_get_addr call
7302 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
7303 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
7304 if (tls_type
== tls::TLSOPT_TO_LE
)
7306 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7307 Insn insn
= addi_3_3
;
7308 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7309 this->skip_next_tls_get_addr_call();
7310 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7311 view
+= 2 * big_endian
;
7315 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7317 // Second instruction of an initial exec sequence
7318 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7319 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
7320 if (tls_type
== tls::TLSOPT_TO_LE
)
7322 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7323 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7324 unsigned int reg
= size
== 32 ? 2 : 13;
7325 insn
= at_tls_transform(insn
, reg
);
7326 gold_assert(insn
!= 0);
7327 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7328 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7329 view
+= 2 * big_endian
;
7330 value
= psymval
->value(object
, rela
.get_r_addend());
7333 else if (!has_stub_value
)
7336 if (!(size
== 32 && r_type
== elfcpp::R_PPC_PLTREL24
))
7337 addend
= rela
.get_r_addend();
7338 value
= psymval
->value(object
, addend
);
7339 if (size
== 64 && is_branch_reloc(r_type
))
7341 if (target
->abiversion() >= 2)
7344 value
+= object
->ppc64_local_entry_offset(gsym
);
7346 value
+= object
->ppc64_local_entry_offset(r_sym
);
7350 unsigned int dest_shndx
;
7351 target
->symval_for_branch(relinfo
->symtab
, gsym
, object
,
7352 &value
, &dest_shndx
);
7355 Address max_branch_offset
= max_branch_delta(r_type
);
7356 if (max_branch_offset
!= 0
7357 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
7359 Stub_table
<size
, big_endian
>* stub_table
7360 = object
->stub_table(relinfo
->data_shndx
);
7361 if (stub_table
!= NULL
)
7363 Address off
= stub_table
->find_long_branch_entry(object
, value
);
7364 if (off
!= invalid_address
)
7366 value
= (stub_table
->stub_address() + stub_table
->plt_size()
7368 has_stub_value
= true;
7376 case elfcpp::R_PPC64_REL64
:
7377 case elfcpp::R_POWERPC_REL32
:
7378 case elfcpp::R_POWERPC_REL24
:
7379 case elfcpp::R_PPC_PLTREL24
:
7380 case elfcpp::R_PPC_LOCAL24PC
:
7381 case elfcpp::R_POWERPC_REL16
:
7382 case elfcpp::R_POWERPC_REL16_LO
:
7383 case elfcpp::R_POWERPC_REL16_HI
:
7384 case elfcpp::R_POWERPC_REL16_HA
:
7385 case elfcpp::R_POWERPC_REL14
:
7386 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7387 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7391 case elfcpp::R_PPC64_TOC16
:
7392 case elfcpp::R_PPC64_TOC16_LO
:
7393 case elfcpp::R_PPC64_TOC16_HI
:
7394 case elfcpp::R_PPC64_TOC16_HA
:
7395 case elfcpp::R_PPC64_TOC16_DS
:
7396 case elfcpp::R_PPC64_TOC16_LO_DS
:
7397 // Subtract the TOC base address.
7398 value
-= (target
->got_section()->output_section()->address()
7399 + object
->toc_base_offset());
7402 case elfcpp::R_POWERPC_SECTOFF
:
7403 case elfcpp::R_POWERPC_SECTOFF_LO
:
7404 case elfcpp::R_POWERPC_SECTOFF_HI
:
7405 case elfcpp::R_POWERPC_SECTOFF_HA
:
7406 case elfcpp::R_PPC64_SECTOFF_DS
:
7407 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7409 value
-= os
->address();
7412 case elfcpp::R_PPC64_TPREL16_DS
:
7413 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7414 case elfcpp::R_PPC64_TPREL16_HIGH
:
7415 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7417 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
7419 case elfcpp::R_POWERPC_TPREL16
:
7420 case elfcpp::R_POWERPC_TPREL16_LO
:
7421 case elfcpp::R_POWERPC_TPREL16_HI
:
7422 case elfcpp::R_POWERPC_TPREL16_HA
:
7423 case elfcpp::R_POWERPC_TPREL
:
7424 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7425 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7426 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7427 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7428 // tls symbol values are relative to tls_segment()->vaddr()
7432 case elfcpp::R_PPC64_DTPREL16_DS
:
7433 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7434 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7435 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7436 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7437 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7439 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
7440 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
7442 case elfcpp::R_POWERPC_DTPREL16
:
7443 case elfcpp::R_POWERPC_DTPREL16_LO
:
7444 case elfcpp::R_POWERPC_DTPREL16_HI
:
7445 case elfcpp::R_POWERPC_DTPREL16_HA
:
7446 case elfcpp::R_POWERPC_DTPREL
:
7447 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7448 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7449 // tls symbol values are relative to tls_segment()->vaddr()
7450 value
-= dtp_offset
;
7453 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7455 value
+= object
->ppc64_local_entry_offset(gsym
);
7457 value
+= object
->ppc64_local_entry_offset(r_sym
);
7464 Insn branch_bit
= 0;
7467 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7468 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7469 branch_bit
= 1 << 21;
7470 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7471 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7473 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
7474 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7477 if (this->is_isa_v2
)
7479 // Set 'a' bit. This is 0b00010 in BO field for branch
7480 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
7481 // for branch on CTR insns (BO == 1a00t or 1a01t).
7482 if ((insn
& (0x14 << 21)) == (0x04 << 21))
7484 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
7491 // Invert 'y' bit if not the default.
7492 if (static_cast<Signed_address
>(value
) < 0)
7495 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7505 // Multi-instruction sequences that access the TOC can be
7506 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
7507 // to nop; addi rb,r2,x;
7513 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7514 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7515 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7516 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7517 case elfcpp::R_POWERPC_GOT16_HA
:
7518 case elfcpp::R_PPC64_TOC16_HA
:
7519 if (parameters
->options().toc_optimize())
7521 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7522 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7523 if ((insn
& ((0x3f << 26) | 0x1f << 16))
7524 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7525 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7526 _("toc optimization is not supported "
7527 "for %#08x instruction"), insn
);
7528 else if (value
+ 0x8000 < 0x10000)
7530 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
7536 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7537 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7538 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7539 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7540 case elfcpp::R_POWERPC_GOT16_LO
:
7541 case elfcpp::R_PPC64_GOT16_LO_DS
:
7542 case elfcpp::R_PPC64_TOC16_LO
:
7543 case elfcpp::R_PPC64_TOC16_LO_DS
:
7544 if (parameters
->options().toc_optimize())
7546 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7547 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7548 if (!ok_lo_toc_insn(insn
))
7549 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7550 _("toc optimization is not supported "
7551 "for %#08x instruction"), insn
);
7552 else if (value
+ 0x8000 < 0x10000)
7554 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
7556 // Transform addic to addi when we change reg.
7557 insn
&= ~((0x3f << 26) | (0x1f << 16));
7558 insn
|= (14u << 26) | (2 << 16);
7562 insn
&= ~(0x1f << 16);
7565 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
7572 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
7573 elfcpp::Shdr
<size
, big_endian
> shdr(relinfo
->data_shdr
);
7576 case elfcpp::R_POWERPC_ADDR32
:
7577 case elfcpp::R_POWERPC_UADDR32
:
7579 overflow
= Reloc::CHECK_BITFIELD
;
7582 case elfcpp::R_POWERPC_REL32
:
7584 overflow
= Reloc::CHECK_SIGNED
;
7587 case elfcpp::R_POWERPC_UADDR16
:
7588 overflow
= Reloc::CHECK_BITFIELD
;
7591 case elfcpp::R_POWERPC_ADDR16
:
7592 // We really should have three separate relocations,
7593 // one for 16-bit data, one for insns with 16-bit signed fields,
7594 // and one for insns with 16-bit unsigned fields.
7595 overflow
= Reloc::CHECK_BITFIELD
;
7596 if ((shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
7597 overflow
= Reloc::CHECK_LOW_INSN
;
7600 case elfcpp::R_POWERPC_ADDR16_HI
:
7601 case elfcpp::R_POWERPC_ADDR16_HA
:
7602 case elfcpp::R_POWERPC_GOT16_HI
:
7603 case elfcpp::R_POWERPC_GOT16_HA
:
7604 case elfcpp::R_POWERPC_PLT16_HI
:
7605 case elfcpp::R_POWERPC_PLT16_HA
:
7606 case elfcpp::R_POWERPC_SECTOFF_HI
:
7607 case elfcpp::R_POWERPC_SECTOFF_HA
:
7608 case elfcpp::R_PPC64_TOC16_HI
:
7609 case elfcpp::R_PPC64_TOC16_HA
:
7610 case elfcpp::R_PPC64_PLTGOT16_HI
:
7611 case elfcpp::R_PPC64_PLTGOT16_HA
:
7612 case elfcpp::R_POWERPC_TPREL16_HI
:
7613 case elfcpp::R_POWERPC_TPREL16_HA
:
7614 case elfcpp::R_POWERPC_DTPREL16_HI
:
7615 case elfcpp::R_POWERPC_DTPREL16_HA
:
7616 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7617 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7618 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7619 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7620 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7621 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7622 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7623 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7624 case elfcpp::R_POWERPC_REL16_HI
:
7625 case elfcpp::R_POWERPC_REL16_HA
:
7627 overflow
= Reloc::CHECK_HIGH_INSN
;
7630 case elfcpp::R_POWERPC_REL16
:
7631 case elfcpp::R_PPC64_TOC16
:
7632 case elfcpp::R_POWERPC_GOT16
:
7633 case elfcpp::R_POWERPC_SECTOFF
:
7634 case elfcpp::R_POWERPC_TPREL16
:
7635 case elfcpp::R_POWERPC_DTPREL16
:
7636 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7637 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7638 case elfcpp::R_POWERPC_GOT_TPREL16
:
7639 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7640 overflow
= Reloc::CHECK_LOW_INSN
;
7643 case elfcpp::R_POWERPC_ADDR24
:
7644 case elfcpp::R_POWERPC_ADDR14
:
7645 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7646 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7647 case elfcpp::R_PPC64_ADDR16_DS
:
7648 case elfcpp::R_POWERPC_REL24
:
7649 case elfcpp::R_PPC_PLTREL24
:
7650 case elfcpp::R_PPC_LOCAL24PC
:
7651 case elfcpp::R_PPC64_TPREL16_DS
:
7652 case elfcpp::R_PPC64_DTPREL16_DS
:
7653 case elfcpp::R_PPC64_TOC16_DS
:
7654 case elfcpp::R_PPC64_GOT16_DS
:
7655 case elfcpp::R_PPC64_SECTOFF_DS
:
7656 case elfcpp::R_POWERPC_REL14
:
7657 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7658 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7659 overflow
= Reloc::CHECK_SIGNED
;
7663 if (overflow
== Reloc::CHECK_LOW_INSN
7664 || overflow
== Reloc::CHECK_HIGH_INSN
)
7666 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
7667 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
7669 if ((insn
& (0x3f << 26)) == 10u << 26 /* cmpli */)
7670 overflow
= Reloc::CHECK_BITFIELD
;
7671 else if (overflow
== Reloc::CHECK_LOW_INSN
7672 ? ((insn
& (0x3f << 26)) == 28u << 26 /* andi */
7673 || (insn
& (0x3f << 26)) == 24u << 26 /* ori */
7674 || (insn
& (0x3f << 26)) == 26u << 26 /* xori */)
7675 : ((insn
& (0x3f << 26)) == 29u << 26 /* andis */
7676 || (insn
& (0x3f << 26)) == 25u << 26 /* oris */
7677 || (insn
& (0x3f << 26)) == 27u << 26 /* xoris */))
7678 overflow
= Reloc::CHECK_UNSIGNED
;
7680 overflow
= Reloc::CHECK_SIGNED
;
7683 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
7684 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
7687 case elfcpp::R_POWERPC_NONE
:
7688 case elfcpp::R_POWERPC_TLS
:
7689 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
7690 case elfcpp::R_POWERPC_GNU_VTENTRY
:
7693 case elfcpp::R_PPC64_ADDR64
:
7694 case elfcpp::R_PPC64_REL64
:
7695 case elfcpp::R_PPC64_TOC
:
7696 case elfcpp::R_PPC64_ADDR64_LOCAL
:
7697 Reloc::addr64(view
, value
);
7700 case elfcpp::R_POWERPC_TPREL
:
7701 case elfcpp::R_POWERPC_DTPREL
:
7703 Reloc::addr64(view
, value
);
7705 status
= Reloc::addr32(view
, value
, overflow
);
7708 case elfcpp::R_PPC64_UADDR64
:
7709 Reloc::addr64_u(view
, value
);
7712 case elfcpp::R_POWERPC_ADDR32
:
7713 status
= Reloc::addr32(view
, value
, overflow
);
7716 case elfcpp::R_POWERPC_REL32
:
7717 case elfcpp::R_POWERPC_UADDR32
:
7718 status
= Reloc::addr32_u(view
, value
, overflow
);
7721 case elfcpp::R_POWERPC_ADDR24
:
7722 case elfcpp::R_POWERPC_REL24
:
7723 case elfcpp::R_PPC_PLTREL24
:
7724 case elfcpp::R_PPC_LOCAL24PC
:
7725 status
= Reloc::addr24(view
, value
, overflow
);
7728 case elfcpp::R_POWERPC_GOT_DTPREL16
:
7729 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
7730 case elfcpp::R_POWERPC_GOT_TPREL16
:
7731 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
7734 // On ppc64 these are all ds form
7735 status
= Reloc::addr16_ds(view
, value
, overflow
);
7738 case elfcpp::R_POWERPC_ADDR16
:
7739 case elfcpp::R_POWERPC_REL16
:
7740 case elfcpp::R_PPC64_TOC16
:
7741 case elfcpp::R_POWERPC_GOT16
:
7742 case elfcpp::R_POWERPC_SECTOFF
:
7743 case elfcpp::R_POWERPC_TPREL16
:
7744 case elfcpp::R_POWERPC_DTPREL16
:
7745 case elfcpp::R_POWERPC_GOT_TLSGD16
:
7746 case elfcpp::R_POWERPC_GOT_TLSLD16
:
7747 case elfcpp::R_POWERPC_ADDR16_LO
:
7748 case elfcpp::R_POWERPC_REL16_LO
:
7749 case elfcpp::R_PPC64_TOC16_LO
:
7750 case elfcpp::R_POWERPC_GOT16_LO
:
7751 case elfcpp::R_POWERPC_SECTOFF_LO
:
7752 case elfcpp::R_POWERPC_TPREL16_LO
:
7753 case elfcpp::R_POWERPC_DTPREL16_LO
:
7754 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
7755 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
7756 status
= Reloc::addr16(view
, value
, overflow
);
7759 case elfcpp::R_POWERPC_UADDR16
:
7760 status
= Reloc::addr16_u(view
, value
, overflow
);
7763 case elfcpp::R_PPC64_ADDR16_HIGH
:
7764 case elfcpp::R_PPC64_TPREL16_HIGH
:
7765 case elfcpp::R_PPC64_DTPREL16_HIGH
:
7767 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
7769 case elfcpp::R_POWERPC_ADDR16_HI
:
7770 case elfcpp::R_POWERPC_REL16_HI
:
7771 case elfcpp::R_PPC64_TOC16_HI
:
7772 case elfcpp::R_POWERPC_GOT16_HI
:
7773 case elfcpp::R_POWERPC_SECTOFF_HI
:
7774 case elfcpp::R_POWERPC_TPREL16_HI
:
7775 case elfcpp::R_POWERPC_DTPREL16_HI
:
7776 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
7777 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
7778 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
7779 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
7780 Reloc::addr16_hi(view
, value
);
7783 case elfcpp::R_PPC64_ADDR16_HIGHA
:
7784 case elfcpp::R_PPC64_TPREL16_HIGHA
:
7785 case elfcpp::R_PPC64_DTPREL16_HIGHA
:
7787 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
7789 case elfcpp::R_POWERPC_ADDR16_HA
:
7790 case elfcpp::R_POWERPC_REL16_HA
:
7791 case elfcpp::R_PPC64_TOC16_HA
:
7792 case elfcpp::R_POWERPC_GOT16_HA
:
7793 case elfcpp::R_POWERPC_SECTOFF_HA
:
7794 case elfcpp::R_POWERPC_TPREL16_HA
:
7795 case elfcpp::R_POWERPC_DTPREL16_HA
:
7796 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
7797 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
7798 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
7799 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
7800 Reloc::addr16_ha(view
, value
);
7803 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7805 // R_PPC_EMB_NADDR16_LO
7807 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7808 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7809 Reloc::addr16_hi2(view
, value
);
7812 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7814 // R_PPC_EMB_NADDR16_HI
7816 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7817 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7818 Reloc::addr16_ha2(view
, value
);
7821 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7823 // R_PPC_EMB_NADDR16_HA
7825 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7826 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7827 Reloc::addr16_hi3(view
, value
);
7830 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7834 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7835 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7836 Reloc::addr16_ha3(view
, value
);
7839 case elfcpp::R_PPC64_DTPREL16_DS
:
7840 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7842 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7844 case elfcpp::R_PPC64_TPREL16_DS
:
7845 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7847 // R_PPC_TLSGD, R_PPC_TLSLD
7849 case elfcpp::R_PPC64_ADDR16_DS
:
7850 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7851 case elfcpp::R_PPC64_TOC16_DS
:
7852 case elfcpp::R_PPC64_TOC16_LO_DS
:
7853 case elfcpp::R_PPC64_GOT16_DS
:
7854 case elfcpp::R_PPC64_GOT16_LO_DS
:
7855 case elfcpp::R_PPC64_SECTOFF_DS
:
7856 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7857 status
= Reloc::addr16_ds(view
, value
, overflow
);
7860 case elfcpp::R_POWERPC_ADDR14
:
7861 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7862 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7863 case elfcpp::R_POWERPC_REL14
:
7864 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7865 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7866 status
= Reloc::addr14(view
, value
, overflow
);
7869 case elfcpp::R_POWERPC_COPY
:
7870 case elfcpp::R_POWERPC_GLOB_DAT
:
7871 case elfcpp::R_POWERPC_JMP_SLOT
:
7872 case elfcpp::R_POWERPC_RELATIVE
:
7873 case elfcpp::R_POWERPC_DTPMOD
:
7874 case elfcpp::R_PPC64_JMP_IREL
:
7875 case elfcpp::R_POWERPC_IRELATIVE
:
7876 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7877 _("unexpected reloc %u in object file"),
7881 case elfcpp::R_PPC_EMB_SDA21
:
7886 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7890 case elfcpp::R_PPC_EMB_SDA2I16
:
7891 case elfcpp::R_PPC_EMB_SDA2REL
:
7894 // R_PPC64_TLSGD, R_PPC64_TLSLD
7897 case elfcpp::R_POWERPC_PLT32
:
7898 case elfcpp::R_POWERPC_PLTREL32
:
7899 case elfcpp::R_POWERPC_PLT16_LO
:
7900 case elfcpp::R_POWERPC_PLT16_HI
:
7901 case elfcpp::R_POWERPC_PLT16_HA
:
7902 case elfcpp::R_PPC_SDAREL16
:
7903 case elfcpp::R_POWERPC_ADDR30
:
7904 case elfcpp::R_PPC64_PLT64
:
7905 case elfcpp::R_PPC64_PLTREL64
:
7906 case elfcpp::R_PPC64_PLTGOT16
:
7907 case elfcpp::R_PPC64_PLTGOT16_LO
:
7908 case elfcpp::R_PPC64_PLTGOT16_HI
:
7909 case elfcpp::R_PPC64_PLTGOT16_HA
:
7910 case elfcpp::R_PPC64_PLT16_LO_DS
:
7911 case elfcpp::R_PPC64_PLTGOT16_DS
:
7912 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7913 case elfcpp::R_PPC_EMB_RELSDA
:
7914 case elfcpp::R_PPC_TOC16
:
7917 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7918 _("unsupported reloc %u"),
7922 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
7925 && gsym
->is_undefined()
7926 && is_branch_reloc(r_type
))))
7928 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7929 _("relocation overflow"));
7931 gold_info(_("try relinking with a smaller --stub-group-size"));
7937 // Relocate section data.
7939 template<int size
, bool big_endian
>
7941 Target_powerpc
<size
, big_endian
>::relocate_section(
7942 const Relocate_info
<size
, big_endian
>* relinfo
,
7943 unsigned int sh_type
,
7944 const unsigned char* prelocs
,
7946 Output_section
* output_section
,
7947 bool needs_special_offset_handling
,
7948 unsigned char* view
,
7950 section_size_type view_size
,
7951 const Reloc_symbol_changes
* reloc_symbol_changes
)
7953 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7954 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
7955 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
7956 Powerpc_comdat_behavior
;
7958 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7960 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
7961 Powerpc_relocate
, Powerpc_comdat_behavior
>(
7967 needs_special_offset_handling
,
7971 reloc_symbol_changes
);
7974 class Powerpc_scan_relocatable_reloc
7977 // Return the strategy to use for a local symbol which is not a
7978 // section symbol, given the relocation type.
7979 inline Relocatable_relocs::Reloc_strategy
7980 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
7982 if (r_type
== 0 && r_sym
== 0)
7983 return Relocatable_relocs::RELOC_DISCARD
;
7984 return Relocatable_relocs::RELOC_COPY
;
7987 // Return the strategy to use for a local symbol which is a section
7988 // symbol, given the relocation type.
7989 inline Relocatable_relocs::Reloc_strategy
7990 local_section_strategy(unsigned int, Relobj
*)
7992 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
7995 // Return the strategy to use for a global symbol, given the
7996 // relocation type, the object, and the symbol index.
7997 inline Relocatable_relocs::Reloc_strategy
7998 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
8000 if (r_type
== elfcpp::R_PPC_PLTREL24
)
8001 return Relocatable_relocs::RELOC_SPECIAL
;
8002 return Relocatable_relocs::RELOC_COPY
;
8006 // Scan the relocs during a relocatable link.
8008 template<int size
, bool big_endian
>
8010 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
8011 Symbol_table
* symtab
,
8013 Sized_relobj_file
<size
, big_endian
>* object
,
8014 unsigned int data_shndx
,
8015 unsigned int sh_type
,
8016 const unsigned char* prelocs
,
8018 Output_section
* output_section
,
8019 bool needs_special_offset_handling
,
8020 size_t local_symbol_count
,
8021 const unsigned char* plocal_symbols
,
8022 Relocatable_relocs
* rr
)
8024 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8026 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
8027 Powerpc_scan_relocatable_reloc
>(
8035 needs_special_offset_handling
,
8041 // Emit relocations for a section.
8042 // This is a modified version of the function by the same name in
8043 // target-reloc.h. Using relocate_special_relocatable for
8044 // R_PPC_PLTREL24 would require duplication of the entire body of the
8045 // loop, so we may as well duplicate the whole thing.
8047 template<int size
, bool big_endian
>
8049 Target_powerpc
<size
, big_endian
>::relocate_relocs(
8050 const Relocate_info
<size
, big_endian
>* relinfo
,
8051 unsigned int sh_type
,
8052 const unsigned char* prelocs
,
8054 Output_section
* output_section
,
8055 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8056 const Relocatable_relocs
* rr
,
8058 Address view_address
,
8060 unsigned char* reloc_view
,
8061 section_size_type reloc_view_size
)
8063 gold_assert(sh_type
== elfcpp::SHT_RELA
);
8065 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
8067 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
8069 const int reloc_size
8070 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
8072 Powerpc_relobj
<size
, big_endian
>* const object
8073 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
8074 const unsigned int local_count
= object
->local_symbol_count();
8075 unsigned int got2_shndx
= object
->got2_shndx();
8076 Address got2_addend
= 0;
8077 if (got2_shndx
!= 0)
8079 got2_addend
= object
->get_output_section_offset(got2_shndx
);
8080 gold_assert(got2_addend
!= invalid_address
);
8083 unsigned char* pwrite
= reloc_view
;
8084 bool zap_next
= false;
8085 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
8087 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
8088 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
8091 Reltype
reloc(prelocs
);
8092 Reltype_write
reloc_write(pwrite
);
8094 Address offset
= reloc
.get_r_offset();
8095 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
8096 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8097 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8098 const unsigned int orig_r_sym
= r_sym
;
8099 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
8100 = reloc
.get_r_addend();
8101 const Symbol
* gsym
= NULL
;
8105 // We could arrange to discard these and other relocs for
8106 // tls optimised sequences in the strategy methods, but for
8107 // now do as BFD ld does.
8108 r_type
= elfcpp::R_POWERPC_NONE
;
8112 // Get the new symbol index.
8113 Output_section
* os
= NULL
;
8114 if (r_sym
< local_count
)
8118 case Relocatable_relocs::RELOC_COPY
:
8119 case Relocatable_relocs::RELOC_SPECIAL
:
8122 r_sym
= object
->symtab_index(r_sym
);
8123 gold_assert(r_sym
!= -1U);
8127 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
8129 // We are adjusting a section symbol. We need to find
8130 // the symbol table index of the section symbol for
8131 // the output section corresponding to input section
8132 // in which this symbol is defined.
8133 gold_assert(r_sym
< local_count
);
8135 unsigned int shndx
=
8136 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8137 gold_assert(is_ordinary
);
8138 os
= object
->output_section(shndx
);
8139 gold_assert(os
!= NULL
);
8140 gold_assert(os
->needs_symtab_index());
8141 r_sym
= os
->symtab_index();
8151 gsym
= object
->global_symbol(r_sym
);
8152 gold_assert(gsym
!= NULL
);
8153 if (gsym
->is_forwarder())
8154 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
8156 gold_assert(gsym
->has_symtab_index());
8157 r_sym
= gsym
->symtab_index();
8160 // Get the new offset--the location in the output section where
8161 // this relocation should be applied.
8162 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8163 offset
+= offset_in_output_section
;
8166 section_offset_type sot_offset
=
8167 convert_types
<section_offset_type
, Address
>(offset
);
8168 section_offset_type new_sot_offset
=
8169 output_section
->output_offset(object
, relinfo
->data_shndx
,
8171 gold_assert(new_sot_offset
!= -1);
8172 offset
= new_sot_offset
;
8175 // In an object file, r_offset is an offset within the section.
8176 // In an executable or dynamic object, generated by
8177 // --emit-relocs, r_offset is an absolute address.
8178 if (!parameters
->options().relocatable())
8180 offset
+= view_address
;
8181 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
8182 offset
-= offset_in_output_section
;
8185 // Handle the reloc addend based on the strategy.
8186 if (strategy
== Relocatable_relocs::RELOC_COPY
)
8188 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
8190 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
8191 gold_assert(os
!= NULL
);
8192 addend
= psymval
->value(object
, addend
) - os
->address();
8194 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
8196 if (addend
>= 32768)
8197 addend
+= got2_addend
;
8202 if (!parameters
->options().relocatable())
8204 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8205 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
8206 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
8207 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
8209 // First instruction of a global dynamic sequence,
8211 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8212 switch (this->optimize_tls_gd(final
))
8214 case tls::TLSOPT_TO_IE
:
8215 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
8216 - elfcpp::R_POWERPC_GOT_TLSGD16
);
8218 case tls::TLSOPT_TO_LE
:
8219 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
8220 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
8221 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8224 r_type
= elfcpp::R_POWERPC_NONE
;
8225 offset
-= 2 * big_endian
;
8232 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8233 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
8234 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
8235 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
8237 // First instruction of a local dynamic sequence,
8239 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8241 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
8242 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
8244 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8245 const Output_section
* os
= relinfo
->layout
->tls_segment()
8247 gold_assert(os
!= NULL
);
8248 gold_assert(os
->needs_symtab_index());
8249 r_sym
= os
->symtab_index();
8250 addend
= dtp_offset
;
8254 r_type
= elfcpp::R_POWERPC_NONE
;
8255 offset
-= 2 * big_endian
;
8259 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8260 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
8261 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
8262 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
8264 // First instruction of initial exec sequence.
8265 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8266 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8268 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
8269 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
8270 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
8273 r_type
= elfcpp::R_POWERPC_NONE
;
8274 offset
-= 2 * big_endian
;
8278 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
8279 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
8281 // Second instruction of a global dynamic sequence,
8282 // the __tls_get_addr call
8283 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8284 switch (this->optimize_tls_gd(final
))
8286 case tls::TLSOPT_TO_IE
:
8287 r_type
= elfcpp::R_POWERPC_NONE
;
8290 case tls::TLSOPT_TO_LE
:
8291 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8292 offset
+= 2 * big_endian
;
8299 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
8300 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
8302 // Second instruction of a local dynamic sequence,
8303 // the __tls_get_addr call
8304 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
8306 const Output_section
* os
= relinfo
->layout
->tls_segment()
8308 gold_assert(os
!= NULL
);
8309 gold_assert(os
->needs_symtab_index());
8310 r_sym
= os
->symtab_index();
8311 addend
= dtp_offset
;
8312 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8313 offset
+= 2 * big_endian
;
8317 else if (r_type
== elfcpp::R_POWERPC_TLS
)
8319 // Second instruction of an initial exec sequence
8320 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
8321 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
8323 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
8324 offset
+= 2 * big_endian
;
8329 reloc_write
.put_r_offset(offset
);
8330 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
8331 reloc_write
.put_r_addend(addend
);
8333 pwrite
+= reloc_size
;
8336 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
8337 == reloc_view_size
);
8340 // Return the value to use for a dynamic symbol which requires special
8341 // treatment. This is how we support equality comparisons of function
8342 // pointers across shared library boundaries, as described in the
8343 // processor specific ABI supplement.
8345 template<int size
, bool big_endian
>
8347 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8351 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
8352 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8353 p
!= this->stub_tables_
.end();
8356 Address off
= (*p
)->find_plt_call_entry(gsym
);
8357 if (off
!= invalid_address
)
8358 return (*p
)->stub_address() + off
;
8361 else if (this->abiversion() >= 2)
8363 Address off
= this->glink_section()->find_global_entry(gsym
);
8364 if (off
!= invalid_address
)
8365 return this->glink_section()->global_entry_address() + off
;
8370 // Return the PLT address to use for a local symbol.
8371 template<int size
, bool big_endian
>
8373 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
8374 const Relobj
* object
,
8375 unsigned int symndx
) const
8379 const Sized_relobj
<size
, big_endian
>* relobj
8380 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
8381 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8382 p
!= this->stub_tables_
.end();
8385 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
8387 if (off
!= invalid_address
)
8388 return (*p
)->stub_address() + off
;
8394 // Return the PLT address to use for a global symbol.
8395 template<int size
, bool big_endian
>
8397 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
8398 const Symbol
* gsym
) const
8402 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
8403 p
!= this->stub_tables_
.end();
8406 Address off
= (*p
)->find_plt_call_entry(gsym
);
8407 if (off
!= invalid_address
)
8408 return (*p
)->stub_address() + off
;
8411 else if (this->abiversion() >= 2)
8413 Address off
= this->glink_section()->find_global_entry(gsym
);
8414 if (off
!= invalid_address
)
8415 return this->glink_section()->global_entry_address() + off
;
8420 // Return the offset to use for the GOT_INDX'th got entry which is
8421 // for a local tls symbol specified by OBJECT, SYMNDX.
8422 template<int size
, bool big_endian
>
8424 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
8425 const Relobj
* object
,
8426 unsigned int symndx
,
8427 unsigned int got_indx
) const
8429 const Powerpc_relobj
<size
, big_endian
>* ppc_object
8430 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
8431 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
8433 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8434 got_type
<= GOT_TYPE_TPREL
;
8435 got_type
= Got_type(got_type
+ 1))
8436 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
8438 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
8439 if (got_type
== GOT_TYPE_TLSGD
)
8441 if (off
== got_indx
* (size
/ 8))
8443 if (got_type
== GOT_TYPE_TPREL
)
8453 // Return the offset to use for the GOT_INDX'th got entry which is
8454 // for global tls symbol GSYM.
8455 template<int size
, bool big_endian
>
8457 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
8459 unsigned int got_indx
) const
8461 if (gsym
->type() == elfcpp::STT_TLS
)
8463 for (Got_type got_type
= GOT_TYPE_TLSGD
;
8464 got_type
<= GOT_TYPE_TPREL
;
8465 got_type
= Got_type(got_type
+ 1))
8466 if (gsym
->has_got_offset(got_type
))
8468 unsigned int off
= gsym
->got_offset(got_type
);
8469 if (got_type
== GOT_TYPE_TLSGD
)
8471 if (off
== got_indx
* (size
/ 8))
8473 if (got_type
== GOT_TYPE_TPREL
)
8483 // The selector for powerpc object files.
8485 template<int size
, bool big_endian
>
8486 class Target_selector_powerpc
: public Target_selector
8489 Target_selector_powerpc()
8490 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
8493 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
8494 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
8496 ? (big_endian
? "elf64ppc" : "elf64lppc")
8497 : (big_endian
? "elf32ppc" : "elf32lppc")))
8501 do_instantiate_target()
8502 { return new Target_powerpc
<size
, big_endian
>(); }
8505 Target_selector_powerpc
<32, true> target_selector_ppc32
;
8506 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
8507 Target_selector_powerpc
<64, true> target_selector_ppc64
;
8508 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
8510 // Instantiate these constants for -O0
8511 template<int size
, bool big_endian
>
8512 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
8513 template<int size
, bool big_endian
>
8514 const typename Output_data_glink
<size
, big_endian
>::Address
8515 Output_data_glink
<size
, big_endian
>::invalid_address
;
8516 template<int size
, bool big_endian
>
8517 const typename Stub_table
<size
, big_endian
>::Address
8518 Stub_table
<size
, big_endian
>::invalid_address
;
8519 template<int size
, bool big_endian
>
8520 const typename Target_powerpc
<size
, big_endian
>::Address
8521 Target_powerpc
<size
, big_endian
>::invalid_address
;
8523 } // End anonymous namespace.