1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012 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.
28 #include "parameters.h"
35 #include "copy-relocs.h"
37 #include "target-reloc.h"
38 #include "target-select.h"
48 template<int size
, bool big_endian
>
49 class Output_data_plt_powerpc
;
51 template<int size
, bool big_endian
>
52 class Output_data_brlt_powerpc
;
54 template<int size
, bool big_endian
>
55 class Output_data_got_powerpc
;
57 template<int size
, bool big_endian
>
58 class Output_data_glink
;
60 template<int size
, bool big_endian
>
63 template<int size
, bool big_endian
>
64 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
67 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
68 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
69 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
71 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
72 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
73 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
74 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
75 opd_ent_(), access_from_map_(), has14_(), stub_table_()
81 // The .got2 section shndx.
86 return this->special_
;
91 // The .opd section shndx.
98 return this->special_
;
101 // Init OPD entry arrays.
103 init_opd(size_t opd_size
)
105 size_t count
= this->opd_ent_ndx(opd_size
);
106 this->opd_ent_
.resize(count
);
109 // Return section and offset of function entry for .opd + R_OFF.
111 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
113 size_t ndx
= this->opd_ent_ndx(r_off
);
114 gold_assert(ndx
< this->opd_ent_
.size());
115 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
117 *value
= this->opd_ent_
[ndx
].off
;
118 return this->opd_ent_
[ndx
].shndx
;
121 // Set section and offset of function entry for .opd + R_OFF.
123 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
125 size_t ndx
= this->opd_ent_ndx(r_off
);
126 gold_assert(ndx
< this->opd_ent_
.size());
127 this->opd_ent_
[ndx
].shndx
= shndx
;
128 this->opd_ent_
[ndx
].off
= value
;
131 // Return discard flag for .opd + R_OFF.
133 get_opd_discard(Address r_off
) const
135 size_t ndx
= this->opd_ent_ndx(r_off
);
136 gold_assert(ndx
< this->opd_ent_
.size());
137 return this->opd_ent_
[ndx
].discard
;
140 // Set discard flag for .opd + R_OFF.
142 set_opd_discard(Address r_off
)
144 size_t ndx
= this->opd_ent_ndx(r_off
);
145 gold_assert(ndx
< this->opd_ent_
.size());
146 this->opd_ent_
[ndx
].discard
= true;
151 { return &this->access_from_map_
; }
153 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
154 // section at DST_OFF.
156 add_reference(Object
* src_obj
,
157 unsigned int src_indx
,
158 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
160 Section_id
src_id(src_obj
, src_indx
);
161 this->access_from_map_
[dst_off
].insert(src_id
);
164 // Add a reference to the code section specified by the .opd entry
167 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
169 size_t ndx
= this->opd_ent_ndx(dst_off
);
170 if (ndx
>= this->opd_ent_
.size())
171 this->opd_ent_
.resize(ndx
+ 1);
172 this->opd_ent_
[ndx
].gc_mark
= true;
176 process_gc_mark(Symbol_table
* symtab
)
178 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
179 if (this->opd_ent_
[i
].gc_mark
)
181 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
182 symtab
->gc()->worklist().push(Section_id(this, shndx
));
188 { return this->opd_valid_
; }
192 { this->opd_valid_
= true; }
194 // Examine .rela.opd to build info about function entry points.
196 scan_opd_relocs(size_t reloc_count
,
197 const unsigned char* prelocs
,
198 const unsigned char* plocal_syms
);
200 // Perform the Sized_relobj_file method, then set up opd info from
203 do_read_relocs(Read_relocs_data
*);
206 do_find_special_sections(Read_symbols_data
* sd
);
208 // Adjust this local symbol value. Return false if the symbol
209 // should be discarded from the output file.
211 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
213 if (size
== 64 && this->opd_shndx() != 0)
216 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
218 if (this->get_opd_discard(lv
->input_value()))
224 // Return offset in output GOT section that this object will use
225 // as a TOC pointer. Won't be just a constant with multi-toc support.
227 toc_base_offset() const
231 set_has_small_toc_reloc()
232 { has_small_toc_reloc_
= true; }
235 has_small_toc_reloc() const
236 { return has_small_toc_reloc_
; }
239 set_has_14bit_branch(unsigned int shndx
)
241 if (shndx
>= this->has14_
.size())
242 this->has14_
.resize(shndx
+ 1);
243 this->has14_
[shndx
] = true;
247 has_14bit_branch(unsigned int shndx
) const
248 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
251 set_stub_table(unsigned int shndx
, Stub_table
<size
, big_endian
>* stub_table
)
253 if (shndx
>= this->stub_table_
.size())
254 this->stub_table_
.resize(shndx
+ 1);
255 this->stub_table_
[shndx
] = stub_table
;
258 Stub_table
<size
, big_endian
>*
259 stub_table(unsigned int shndx
)
261 if (shndx
< this->stub_table_
.size())
262 return this->stub_table_
[shndx
];
275 // Return index into opd_ent_ array for .opd entry at OFF.
276 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
277 // apart when the language doesn't use the last 8-byte word, the
278 // environment pointer. Thus dividing the entry section offset by
279 // 16 will give an index into opd_ent_ that works for either layout
280 // of .opd. (It leaves some elements of the vector unused when .opd
281 // entries are spaced 24 bytes apart, but we don't know the spacing
282 // until relocations are processed, and in any case it is possible
283 // for an object to have some entries spaced 16 bytes apart and
284 // others 24 bytes apart.)
286 opd_ent_ndx(size_t off
) const
289 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
290 unsigned int special_
;
292 // For 64-bit, whether this object uses small model relocs to access
294 bool has_small_toc_reloc_
;
296 // Set at the start of gc_process_relocs, when we know opd_ent_
297 // vector is valid. The flag could be made atomic and set in
298 // do_read_relocs with memory_order_release and then tested with
299 // memory_order_acquire, potentially resulting in fewer entries in
303 // The first 8-byte word of an OPD entry gives the address of the
304 // entry point of the function. Relocatable object files have a
305 // relocation on this word. The following vector records the
306 // section and offset specified by these relocations.
307 std::vector
<Opd_ent
> opd_ent_
;
309 // References made to this object's .opd section when running
310 // gc_process_relocs for another object, before the opd_ent_ vector
311 // is valid for this object.
312 Access_from access_from_map_
;
314 // Whether input section has a 14-bit branch reloc.
315 std::vector
<bool> has14_
;
317 // The stub table to use for a given input section.
318 std::vector
<Stub_table
<size
, big_endian
>*> stub_table_
;
321 template<int size
, bool big_endian
>
322 class Target_powerpc
: public Sized_target
<size
, big_endian
>
326 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
327 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
328 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
329 static const Address invalid_address
= static_cast<Address
>(0) - 1;
330 // Offset of tp and dtp pointers from start of TLS block.
331 static const Address tp_offset
= 0x7000;
332 static const Address dtp_offset
= 0x8000;
335 : Sized_target
<size
, big_endian
>(&powerpc_info
),
336 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
337 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
338 dynbss_(NULL
), tlsld_got_offset_(-1U),
339 stub_tables_(), branch_lookup_table_(), branch_info_(),
340 plt_thread_safe_(false)
344 // Process the relocations to determine unreferenced sections for
345 // garbage collection.
347 gc_process_relocs(Symbol_table
* symtab
,
349 Sized_relobj_file
<size
, big_endian
>* object
,
350 unsigned int data_shndx
,
351 unsigned int sh_type
,
352 const unsigned char* prelocs
,
354 Output_section
* output_section
,
355 bool needs_special_offset_handling
,
356 size_t local_symbol_count
,
357 const unsigned char* plocal_symbols
);
359 // Scan the relocations to look for symbol adjustments.
361 scan_relocs(Symbol_table
* symtab
,
363 Sized_relobj_file
<size
, big_endian
>* object
,
364 unsigned int data_shndx
,
365 unsigned int sh_type
,
366 const unsigned char* prelocs
,
368 Output_section
* output_section
,
369 bool needs_special_offset_handling
,
370 size_t local_symbol_count
,
371 const unsigned char* plocal_symbols
);
373 // Map input .toc section to output .got section.
375 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
377 if (size
== 64 && strcmp(name
, ".toc") == 0)
385 // Provide linker defined save/restore functions.
387 define_save_restore_funcs(Layout
*, Symbol_table
*);
389 // No stubs unless a final link.
392 { return !parameters
->options().relocatable(); }
395 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
397 // Stash info about branches, for stub generation.
399 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
400 unsigned int data_shndx
, Address r_offset
,
401 unsigned int r_type
, unsigned int r_sym
, Address addend
)
403 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
404 this->branch_info_
.push_back(info
);
405 if (r_type
== elfcpp::R_POWERPC_REL14
406 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
407 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
408 ppc_object
->set_has_14bit_branch(data_shndx
);
411 Stub_table
<size
, big_endian
>*
415 do_define_standard_symbols(Symbol_table
*, Layout
*);
417 // Finalize the sections.
419 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
421 // Return the value to use for a dynamic which requires special
424 do_dynsym_value(const Symbol
*) const;
426 // Return the PLT address to use for a local symbol.
428 do_plt_address_for_local(const Relobj
*, unsigned int) const;
430 // Return the PLT address to use for a global symbol.
432 do_plt_address_for_global(const Symbol
*) const;
434 // Return the offset to use for the GOT_INDX'th got entry which is
435 // for a local tls symbol specified by OBJECT, SYMNDX.
437 do_tls_offset_for_local(const Relobj
* object
,
439 unsigned int got_indx
) const;
441 // Return the offset to use for the GOT_INDX'th got entry which is
442 // for global tls symbol GSYM.
444 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
446 // Relocate a section.
448 relocate_section(const Relocate_info
<size
, big_endian
>*,
449 unsigned int sh_type
,
450 const unsigned char* prelocs
,
452 Output_section
* output_section
,
453 bool needs_special_offset_handling
,
455 Address view_address
,
456 section_size_type view_size
,
457 const Reloc_symbol_changes
*);
459 // Scan the relocs during a relocatable link.
461 scan_relocatable_relocs(Symbol_table
* symtab
,
463 Sized_relobj_file
<size
, big_endian
>* object
,
464 unsigned int data_shndx
,
465 unsigned int sh_type
,
466 const unsigned char* prelocs
,
468 Output_section
* output_section
,
469 bool needs_special_offset_handling
,
470 size_t local_symbol_count
,
471 const unsigned char* plocal_symbols
,
472 Relocatable_relocs
*);
474 // Emit relocations for a section.
476 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
477 unsigned int sh_type
,
478 const unsigned char* prelocs
,
480 Output_section
* output_section
,
481 typename
elfcpp::Elf_types
<size
>::Elf_Off
482 offset_in_output_section
,
483 const Relocatable_relocs
*,
485 Address view_address
,
487 unsigned char* reloc_view
,
488 section_size_type reloc_view_size
);
490 // Return whether SYM is defined by the ABI.
492 do_is_defined_by_abi(const Symbol
* sym
) const
494 return strcmp(sym
->name(), "__tls_get_addr") == 0;
497 // Return the size of the GOT section.
501 gold_assert(this->got_
!= NULL
);
502 return this->got_
->data_size();
505 // Get the PLT section.
506 const Output_data_plt_powerpc
<size
, big_endian
>*
509 gold_assert(this->plt_
!= NULL
);
513 // Get the IPLT section.
514 const Output_data_plt_powerpc
<size
, big_endian
>*
517 gold_assert(this->iplt_
!= NULL
);
521 // Get the .glink section.
522 const Output_data_glink
<size
, big_endian
>*
523 glink_section() const
525 gold_assert(this->glink_
!= NULL
);
529 // Get the GOT section.
530 const Output_data_got_powerpc
<size
, big_endian
>*
533 gold_assert(this->got_
!= NULL
);
537 // Get the GOT section, creating it if necessary.
538 Output_data_got_powerpc
<size
, big_endian
>*
539 got_section(Symbol_table
*, Layout
*);
542 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
543 const elfcpp::Ehdr
<size
, big_endian
>&);
545 // Return the number of entries in the GOT.
547 got_entry_count() const
549 if (this->got_
== NULL
)
551 return this->got_size() / (size
/ 8);
554 // Return the number of entries in the PLT.
556 plt_entry_count() const;
558 // Return the offset of the first non-reserved PLT entry.
560 first_plt_entry_offset() const;
562 // Return the size of each PLT entry.
564 plt_entry_size() const;
566 // Add any special sections for this symbol to the gc work list.
567 // For powerpc64, this adds the code section of a function
570 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
572 // Handle target specific gc actions when adding a gc reference from
573 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
574 // and DST_OFF. For powerpc64, this adds a referenc to the code
575 // section of a function descriptor.
577 do_gc_add_reference(Symbol_table
* symtab
,
579 unsigned int src_shndx
,
581 unsigned int dst_shndx
,
582 Address dst_off
) const;
584 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
587 { return this->stub_tables_
; }
589 const Output_data_brlt_powerpc
<size
, big_endian
>*
591 { return this->brlt_section_
; }
594 add_branch_lookup_table(Address to
)
596 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
597 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
601 find_branch_lookup_table(Address to
)
603 typename
Branch_lookup_table::const_iterator p
604 = this->branch_lookup_table_
.find(to
);
605 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
609 write_branch_lookup_table(unsigned char *oview
)
611 for (typename
Branch_lookup_table::const_iterator p
612 = this->branch_lookup_table_
.begin();
613 p
!= this->branch_lookup_table_
.end();
616 elfcpp::Swap
<32, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
621 plt_thread_safe() const
622 { return this->plt_thread_safe_
; }
638 : tls_get_addr_(NOT_EXPECTED
),
639 relinfo_(NULL
), relnum_(0), r_offset_(0)
644 if (this->tls_get_addr_
!= NOT_EXPECTED
)
651 if (this->relinfo_
!= NULL
)
652 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
653 _("missing expected __tls_get_addr call"));
657 expect_tls_get_addr_call(
658 const Relocate_info
<size
, big_endian
>* relinfo
,
662 this->tls_get_addr_
= EXPECTED
;
663 this->relinfo_
= relinfo
;
664 this->relnum_
= relnum
;
665 this->r_offset_
= r_offset
;
669 expect_tls_get_addr_call()
670 { this->tls_get_addr_
= EXPECTED
; }
673 skip_next_tls_get_addr_call()
674 {this->tls_get_addr_
= SKIP
; }
677 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
679 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
680 || r_type
== elfcpp::R_PPC_PLTREL24
)
682 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
683 Tls_get_addr last_tls
= this->tls_get_addr_
;
684 this->tls_get_addr_
= NOT_EXPECTED
;
685 if (is_tls_call
&& last_tls
!= EXPECTED
)
687 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
696 // What we're up to regarding calls to __tls_get_addr.
697 // On powerpc, the branch and link insn making a call to
698 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
699 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
700 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
701 // The marker relocation always comes first, and has the same
702 // symbol as the reloc on the insn setting up the __tls_get_addr
703 // argument. This ties the arg setup insn with the call insn,
704 // allowing ld to safely optimize away the call. We check that
705 // every call to __tls_get_addr has a marker relocation, and that
706 // every marker relocation is on a call to __tls_get_addr.
707 Tls_get_addr tls_get_addr_
;
708 // Info about the last reloc for error message.
709 const Relocate_info
<size
, big_endian
>* relinfo_
;
714 // The class which scans relocations.
715 class Scan
: protected Track_tls
718 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
721 : Track_tls(), issued_non_pic_error_(false)
725 get_reference_flags(unsigned int r_type
);
728 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
729 Sized_relobj_file
<size
, big_endian
>* object
,
730 unsigned int data_shndx
,
731 Output_section
* output_section
,
732 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
733 const elfcpp::Sym
<size
, big_endian
>& lsym
,
737 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
738 Sized_relobj_file
<size
, big_endian
>* object
,
739 unsigned int data_shndx
,
740 Output_section
* output_section
,
741 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
745 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
747 Sized_relobj_file
<size
, big_endian
>* ,
750 const elfcpp::Rela
<size
, big_endian
>& ,
752 const elfcpp::Sym
<size
, big_endian
>&)
756 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
758 Sized_relobj_file
<size
, big_endian
>* ,
761 const elfcpp::Rela
<size
,
763 unsigned int , Symbol
*)
768 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
769 unsigned int r_type
);
772 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
773 unsigned int r_type
, Symbol
*);
776 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
777 Target_powerpc
* target
);
780 check_non_pic(Relobj
*, unsigned int r_type
);
783 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, big_endian
>* object
,
784 unsigned int r_type
);
786 // Whether we have issued an error about a non-PIC compilation.
787 bool issued_non_pic_error_
;
791 symval_for_branch(Address value
, const Sized_symbol
<size
>* gsym
,
792 Powerpc_relobj
<size
, big_endian
>* object
,
793 unsigned int *dest_shndx
);
795 // The class which implements relocation.
796 class Relocate
: protected Track_tls
799 // Use 'at' branch hints when true, 'y' when false.
800 // FIXME maybe: set this with an option.
801 static const bool is_isa_v2
= true;
807 // Do a relocation. Return false if the caller should not issue
808 // any warnings about this relocation.
810 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
811 Output_section
*, size_t relnum
,
812 const elfcpp::Rela
<size
, big_endian
>&,
813 unsigned int r_type
, const Sized_symbol
<size
>*,
814 const Symbol_value
<size
>*,
816 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
820 class Relocate_comdat_behavior
823 // Decide what the linker should do for relocations that refer to
824 // discarded comdat sections.
825 inline Comdat_behavior
826 get(const char* name
)
828 gold::Default_comdat_behavior default_behavior
;
829 Comdat_behavior ret
= default_behavior
.get(name
);
830 if (ret
== CB_WARNING
)
833 && (strcmp(name
, ".fixup") == 0
834 || strcmp(name
, ".got2") == 0))
837 && (strcmp(name
, ".opd") == 0
838 || strcmp(name
, ".toc") == 0
839 || strcmp(name
, ".toc1") == 0))
846 // A class which returns the size required for a relocation type,
847 // used while scanning relocs during a relocatable link.
848 class Relocatable_size_for_reloc
852 get_size_for_reloc(unsigned int, Relobj
*)
859 // Optimize the TLS relocation type based on what we know about the
860 // symbol. IS_FINAL is true if the final address of this symbol is
861 // known at link time.
863 tls::Tls_optimization
864 optimize_tls_gd(bool is_final
)
866 // If we are generating a shared library, then we can't do anything
868 if (parameters
->options().shared())
869 return tls::TLSOPT_NONE
;
872 return tls::TLSOPT_TO_IE
;
873 return tls::TLSOPT_TO_LE
;
876 tls::Tls_optimization
879 if (parameters
->options().shared())
880 return tls::TLSOPT_NONE
;
882 return tls::TLSOPT_TO_LE
;
885 tls::Tls_optimization
886 optimize_tls_ie(bool is_final
)
888 if (!is_final
|| parameters
->options().shared())
889 return tls::TLSOPT_NONE
;
891 return tls::TLSOPT_TO_LE
;
896 make_glink_section(Layout
*);
898 // Create the PLT section.
900 make_plt_section(Symbol_table
*, Layout
*);
903 make_iplt_section(Symbol_table
*, Layout
*);
906 make_brlt_section(Layout
*);
908 // Create a PLT entry for a global symbol.
910 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
912 // Create a PLT entry for a local IFUNC symbol.
914 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
915 Sized_relobj_file
<size
, big_endian
>*,
919 // Create a GOT entry for local dynamic __tls_get_addr.
921 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
922 Sized_relobj_file
<size
, big_endian
>* object
);
925 tlsld_got_offset() const
927 return this->tlsld_got_offset_
;
930 // Get the dynamic reloc section, creating it if necessary.
932 rela_dyn_section(Layout
*);
934 // Copy a relocation against a global symbol.
936 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
937 Sized_relobj_file
<size
, big_endian
>* object
,
938 unsigned int shndx
, Output_section
* output_section
,
939 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
941 this->copy_relocs_
.copy_reloc(symtab
, layout
,
942 symtab
->get_sized_symbol
<size
>(sym
),
943 object
, shndx
, output_section
,
944 reloc
, this->rela_dyn_section(layout
));
947 // Look over all the input sections, deciding where to place stub.
949 group_sections(Layout
*, const Task
*);
951 // Sort output sections by address.
955 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
956 { return sec1
->address() < sec2
->address(); }
962 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
963 unsigned int data_shndx
,
968 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
969 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
975 // If this branch needs a plt call stub, or a long branch stub, make one.
977 make_stub(Stub_table
<size
, big_endian
>*,
978 Stub_table
<size
, big_endian
>*,
979 Symbol_table
*) const;
982 // The branch location..
983 Powerpc_relobj
<size
, big_endian
>* object_
;
986 // ..and the branch type and destination.
987 unsigned int r_type_
;
992 // Information about this specific target which we pass to the
993 // general Target structure.
994 static Target::Target_info powerpc_info
;
996 // The types of GOT entries needed for this platform.
997 // These values are exposed to the ABI in an incremental link.
998 // Do not renumber existing values without changing the version
999 // number of the .gnu_incremental_inputs section.
1003 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1004 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1005 GOT_TYPE_TPREL
// entry for @got@tprel
1009 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1011 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1012 // The IPLT section.
1013 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1014 // Section holding long branch destinations.
1015 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1016 // The .glink section.
1017 Output_data_glink
<size
, big_endian
>* glink_
;
1018 // The dynamic reloc section.
1019 Reloc_section
* rela_dyn_
;
1020 // Relocs saved to avoid a COPY reloc.
1021 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1022 // Space for variables copied with a COPY reloc.
1023 Output_data_space
* dynbss_
;
1024 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1025 unsigned int tlsld_got_offset_
;
1027 Stub_tables stub_tables_
;
1028 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1029 Branch_lookup_table branch_lookup_table_
;
1031 typedef std::vector
<Branch_info
> Branches
;
1032 Branches branch_info_
;
1034 bool plt_thread_safe_
;
1038 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1041 true, // is_big_endian
1042 elfcpp::EM_PPC
, // machine_code
1043 false, // has_make_symbol
1044 false, // has_resolve
1045 false, // has_code_fill
1046 true, // is_default_stack_executable
1047 false, // can_icf_inline_merge_sections
1049 "/usr/lib/ld.so.1", // dynamic_linker
1050 0x10000000, // default_text_segment_address
1051 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1052 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1053 false, // isolate_execinstr
1055 elfcpp::SHN_UNDEF
, // small_common_shndx
1056 elfcpp::SHN_UNDEF
, // large_common_shndx
1057 0, // small_common_section_flags
1058 0, // large_common_section_flags
1059 NULL
, // attributes_section
1060 NULL
// attributes_vendor
1064 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1067 false, // is_big_endian
1068 elfcpp::EM_PPC
, // machine_code
1069 false, // has_make_symbol
1070 false, // has_resolve
1071 false, // has_code_fill
1072 true, // is_default_stack_executable
1073 false, // can_icf_inline_merge_sections
1075 "/usr/lib/ld.so.1", // dynamic_linker
1076 0x10000000, // default_text_segment_address
1077 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1078 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1079 false, // isolate_execinstr
1081 elfcpp::SHN_UNDEF
, // small_common_shndx
1082 elfcpp::SHN_UNDEF
, // large_common_shndx
1083 0, // small_common_section_flags
1084 0, // large_common_section_flags
1085 NULL
, // attributes_section
1086 NULL
// attributes_vendor
1090 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1093 true, // is_big_endian
1094 elfcpp::EM_PPC64
, // machine_code
1095 false, // has_make_symbol
1096 false, // has_resolve
1097 false, // has_code_fill
1098 true, // is_default_stack_executable
1099 false, // can_icf_inline_merge_sections
1101 "/usr/lib/ld.so.1", // dynamic_linker
1102 0x10000000, // default_text_segment_address
1103 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1104 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1105 false, // isolate_execinstr
1107 elfcpp::SHN_UNDEF
, // small_common_shndx
1108 elfcpp::SHN_UNDEF
, // large_common_shndx
1109 0, // small_common_section_flags
1110 0, // large_common_section_flags
1111 NULL
, // attributes_section
1112 NULL
// attributes_vendor
1116 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1119 false, // is_big_endian
1120 elfcpp::EM_PPC64
, // machine_code
1121 false, // has_make_symbol
1122 false, // has_resolve
1123 false, // has_code_fill
1124 true, // is_default_stack_executable
1125 false, // can_icf_inline_merge_sections
1127 "/usr/lib/ld.so.1", // dynamic_linker
1128 0x10000000, // default_text_segment_address
1129 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1130 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1131 false, // isolate_execinstr
1133 elfcpp::SHN_UNDEF
, // small_common_shndx
1134 elfcpp::SHN_UNDEF
, // large_common_shndx
1135 0, // small_common_section_flags
1136 0, // large_common_section_flags
1137 NULL
, // attributes_section
1138 NULL
// attributes_vendor
1142 is_branch_reloc(unsigned int r_type
)
1144 return (r_type
== elfcpp::R_POWERPC_REL24
1145 || r_type
== elfcpp::R_PPC_PLTREL24
1146 || r_type
== elfcpp::R_PPC_LOCAL24PC
1147 || r_type
== elfcpp::R_POWERPC_REL14
1148 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1149 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1150 || r_type
== elfcpp::R_POWERPC_ADDR24
1151 || r_type
== elfcpp::R_POWERPC_ADDR14
1152 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1153 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1156 // If INSN is an opcode that may be used with an @tls operand, return
1157 // the transformed insn for TLS optimisation, otherwise return 0. If
1158 // REG is non-zero only match an insn with RB or RA equal to REG.
1160 at_tls_transform(uint32_t insn
, unsigned int reg
)
1162 if ((insn
& (0x3f << 26)) != 31 << 26)
1166 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1167 rtra
= insn
& ((1 << 26) - (1 << 16));
1168 else if (((insn
>> 16) & 0x1f) == reg
)
1169 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1173 if ((insn
& (0x3ff << 1)) == 266 << 1)
1176 else if ((insn
& (0x1f << 1)) == 23 << 1
1177 && ((insn
& (0x1f << 6)) < 14 << 6
1178 || ((insn
& (0x1f << 6)) >= 16 << 6
1179 && (insn
& (0x1f << 6)) < 24 << 6)))
1180 // load and store indexed -> dform
1181 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1182 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1183 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1184 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1185 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1187 insn
= (58 << 26) | 2;
1194 // Modified version of symtab.h class Symbol member
1195 // Given a direct absolute or pc-relative static relocation against
1196 // the global symbol, this function returns whether a dynamic relocation
1201 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
1203 // No dynamic relocations in a static link!
1204 if (parameters
->doing_static_link())
1207 // A reference to an undefined symbol from an executable should be
1208 // statically resolved to 0, and does not need a dynamic relocation.
1209 // This matches gnu ld behavior.
1210 if (gsym
->is_undefined() && !parameters
->options().shared())
1213 // A reference to an absolute symbol does not need a dynamic relocation.
1214 if (gsym
->is_absolute())
1217 // An absolute reference within a position-independent output file
1218 // will need a dynamic relocation.
1219 if ((flags
& Symbol::ABSOLUTE_REF
)
1220 && parameters
->options().output_is_position_independent())
1223 // A function call that can branch to a local PLT entry does not need
1224 // a dynamic relocation.
1225 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
1228 // A reference to any PLT entry in a non-position-independent executable
1229 // does not need a dynamic relocation.
1230 // Except due to having function descriptors on powerpc64 we don't define
1231 // functions to their plt code in an executable, so this doesn't apply.
1233 && !parameters
->options().output_is_position_independent()
1234 && gsym
->has_plt_offset())
1237 // A reference to a symbol defined in a dynamic object or to a
1238 // symbol that is preemptible will need a dynamic relocation.
1239 if (gsym
->is_from_dynobj()
1240 || gsym
->is_undefined()
1241 || gsym
->is_preemptible())
1244 // For all other cases, return FALSE.
1248 // Modified version of symtab.h class Symbol member
1249 // Whether we should use the PLT offset associated with a symbol for
1250 // a relocation. FLAGS is a set of Reference_flags.
1254 use_plt_offset(const Symbol
* gsym
, int flags
)
1256 // If the symbol doesn't have a PLT offset, then naturally we
1257 // don't want to use it.
1258 if (!gsym
->has_plt_offset())
1261 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1262 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1265 // If we are going to generate a dynamic relocation, then we will
1266 // wind up using that, so no need to use the PLT entry.
1267 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1270 // If the symbol is from a dynamic object, we need to use the PLT
1272 if (gsym
->is_from_dynobj())
1275 // If we are generating a shared object, and this symbol is
1276 // undefined or preemptible, we need to use the PLT entry.
1277 if (parameters
->options().shared()
1278 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1281 // If this is a call to a weak undefined symbol, we need to use
1282 // the PLT entry; the symbol may be defined by a library loaded
1284 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1287 // Otherwise we can use the regular definition.
1291 template<int size
, bool big_endian
>
1292 class Powerpc_relocate_functions
1309 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1310 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1312 template<int valsize
>
1314 has_overflow_signed(Address value
)
1316 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1317 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1318 limit
<<= ((valsize
- 1) >> 1);
1319 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1320 return value
+ limit
> (limit
<< 1) - 1;
1323 template<int valsize
>
1325 has_overflow_bitfield(Address value
)
1327 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1328 limit
<<= ((valsize
- 1) >> 1);
1329 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1330 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1333 template<int valsize
>
1334 static inline Status
1335 overflowed(Address value
, Overflow_check overflow
)
1337 if (overflow
== CHECK_SIGNED
)
1339 if (has_overflow_signed
<valsize
>(value
))
1340 return STATUS_OVERFLOW
;
1342 else if (overflow
== CHECK_BITFIELD
)
1344 if (has_overflow_bitfield
<valsize
>(value
))
1345 return STATUS_OVERFLOW
;
1350 // Do a simple RELA relocation
1351 template<int valsize
>
1352 static inline Status
1353 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1355 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1356 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1357 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1358 return overflowed
<valsize
>(value
, overflow
);
1361 template<int valsize
>
1362 static inline Status
1363 rela(unsigned char* view
,
1364 unsigned int right_shift
,
1365 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1367 Overflow_check overflow
)
1369 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1370 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1371 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1372 Valtype reloc
= value
>> right_shift
;
1375 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1376 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1379 // Do a simple RELA relocation, unaligned.
1380 template<int valsize
>
1381 static inline Status
1382 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1384 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1385 return overflowed
<valsize
>(value
, overflow
);
1388 template<int valsize
>
1389 static inline Status
1390 rela_ua(unsigned char* view
,
1391 unsigned int right_shift
,
1392 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1394 Overflow_check overflow
)
1396 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1398 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1399 Valtype reloc
= value
>> right_shift
;
1402 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1403 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1407 // R_PPC64_ADDR64: (Symbol + Addend)
1409 addr64(unsigned char* view
, Address value
)
1410 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1412 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1414 addr64_u(unsigned char* view
, Address value
)
1415 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1417 // R_POWERPC_ADDR32: (Symbol + Addend)
1418 static inline Status
1419 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1420 { return This::template rela
<32>(view
, value
, overflow
); }
1422 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1423 static inline Status
1424 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1425 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1427 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1428 static inline Status
1429 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1431 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1432 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1433 stat
= STATUS_OVERFLOW
;
1437 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1438 static inline Status
1439 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1440 { return This::template rela
<16>(view
, value
, overflow
); }
1442 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1443 static inline Status
1444 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1445 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1447 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1448 static inline Status
1449 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1451 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1452 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1453 stat
= STATUS_OVERFLOW
;
1457 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1459 addr16_hi(unsigned char* view
, Address value
)
1460 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1462 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1464 addr16_ha(unsigned char* view
, Address value
)
1465 { This::addr16_hi(view
, value
+ 0x8000); }
1467 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1469 addr16_hi2(unsigned char* view
, Address value
)
1470 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1472 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1474 addr16_ha2(unsigned char* view
, Address value
)
1475 { This::addr16_hi2(view
, value
+ 0x8000); }
1477 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1479 addr16_hi3(unsigned char* view
, Address value
)
1480 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1482 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1484 addr16_ha3(unsigned char* view
, Address value
)
1485 { This::addr16_hi3(view
, value
+ 0x8000); }
1487 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1488 static inline Status
1489 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1491 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1492 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1493 stat
= STATUS_OVERFLOW
;
1498 // Stash away the index of .got2 or .opd in a relocatable object, if
1499 // such a section exists.
1501 template<int size
, bool big_endian
>
1503 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1504 Read_symbols_data
* sd
)
1506 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1507 const unsigned char* namesu
= sd
->section_names
->data();
1508 const char* names
= reinterpret_cast<const char*>(namesu
);
1509 section_size_type names_size
= sd
->section_names_size
;
1510 const unsigned char* s
;
1512 s
= this->find_shdr(pshdrs
, size
== 32 ? ".got2" : ".opd",
1513 names
, names_size
, NULL
);
1516 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1517 this->special_
= ndx
;
1519 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1522 // Examine .rela.opd to build info about function entry points.
1524 template<int size
, bool big_endian
>
1526 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1528 const unsigned char* prelocs
,
1529 const unsigned char* plocal_syms
)
1533 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1535 const int reloc_size
1536 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1537 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1538 Address expected_off
= 0;
1539 bool regular
= true;
1540 unsigned int opd_ent_size
= 0;
1542 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1544 Reltype
reloc(prelocs
);
1545 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1546 = reloc
.get_r_info();
1547 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1548 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1550 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1551 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1554 if (r_sym
< this->local_symbol_count())
1556 typename
elfcpp::Sym
<size
, big_endian
>
1557 lsym(plocal_syms
+ r_sym
* sym_size
);
1558 shndx
= lsym
.get_st_shndx();
1559 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1560 value
= lsym
.get_st_value();
1563 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1565 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1566 value
+ reloc
.get_r_addend());
1569 expected_off
= reloc
.get_r_offset();
1570 opd_ent_size
= expected_off
;
1572 else if (expected_off
!= reloc
.get_r_offset())
1574 expected_off
+= opd_ent_size
;
1576 else if (r_type
== elfcpp::R_PPC64_TOC
)
1578 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1583 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1584 this->name().c_str(), r_type
);
1588 if (reloc_count
<= 2)
1589 opd_ent_size
= this->section_size(this->opd_shndx());
1590 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1594 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1595 this->name().c_str());
1601 template<int size
, bool big_endian
>
1603 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1605 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1608 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1609 p
!= rd
->relocs
.end();
1612 if (p
->data_shndx
== this->opd_shndx())
1614 uint64_t opd_size
= this->section_size(this->opd_shndx());
1615 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1618 this->init_opd(opd_size
);
1619 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1620 rd
->local_symbols
->data());
1628 // Set up some symbols.
1630 template<int size
, bool big_endian
>
1632 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1633 Symbol_table
* symtab
,
1638 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1639 // undefined when scanning relocs (and thus requires
1640 // non-relative dynamic relocs). The proper value will be
1642 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1643 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1645 Target_powerpc
<size
, big_endian
>* target
=
1646 static_cast<Target_powerpc
<size
, big_endian
>*>(
1647 parameters
->sized_target
<size
, big_endian
>());
1648 Output_data_got_powerpc
<size
, big_endian
>* got
1649 = target
->got_section(symtab
, layout
);
1650 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1651 Symbol_table::PREDEFINED
,
1655 elfcpp::STV_HIDDEN
, 0,
1659 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1660 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1661 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1663 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1665 = layout
->add_output_section_data(".sdata", 0,
1667 | elfcpp::SHF_WRITE
,
1668 sdata
, ORDER_SMALL_DATA
, false);
1669 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1670 Symbol_table::PREDEFINED
,
1671 os
, 32768, 0, elfcpp::STT_OBJECT
,
1672 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1678 // Set up PowerPC target specific relobj.
1680 template<int size
, bool big_endian
>
1682 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1683 const std::string
& name
,
1684 Input_file
* input_file
,
1685 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1687 int et
= ehdr
.get_e_type();
1688 // ET_EXEC files are valid input for --just-symbols/-R,
1689 // and we treat them as relocatable objects.
1690 if (et
== elfcpp::ET_REL
1691 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1693 Powerpc_relobj
<size
, big_endian
>* obj
=
1694 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1698 else if (et
== elfcpp::ET_DYN
)
1700 Sized_dynobj
<size
, big_endian
>* obj
=
1701 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1707 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1712 template<int size
, bool big_endian
>
1713 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1716 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1717 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1719 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1720 : Output_data_got
<size
, big_endian
>(),
1721 symtab_(symtab
), layout_(layout
),
1722 header_ent_cnt_(size
== 32 ? 3 : 1),
1723 header_index_(size
== 32 ? 0x2000 : 0)
1728 // Create a new GOT entry and return its offset.
1730 add_got_entry(Got_entry got_entry
)
1732 this->reserve_ent();
1733 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1736 // Create a pair of new GOT entries and return the offset of the first.
1738 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
1740 this->reserve_ent(2);
1741 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
1746 add_constant_pair(Valtype c1
, Valtype c2
)
1748 this->reserve_ent(2);
1749 unsigned int got_offset
= this->add_constant(c1
);
1750 this->add_constant(c2
);
1754 // Offset of _GLOBAL_OFFSET_TABLE_.
1758 return this->got_offset(this->header_index_
);
1761 // Offset of base used to access the GOT/TOC.
1762 // The got/toc pointer reg will be set to this value.
1764 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
1767 return this->g_o_t();
1769 return (this->output_section()->address()
1770 + object
->toc_base_offset()
1774 // Ensure our GOT has a header.
1776 set_final_data_size()
1778 if (this->header_ent_cnt_
!= 0)
1779 this->make_header();
1780 Output_data_got
<size
, big_endian
>::set_final_data_size();
1783 // First word of GOT header needs some values that are not
1784 // handled by Output_data_got so poke them in here.
1785 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1787 do_write(Output_file
* of
)
1790 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
1791 val
= this->layout_
->dynamic_section()->address();
1793 val
= this->output_section()->address() + 0x8000;
1794 this->replace_constant(this->header_index_
, val
);
1795 Output_data_got
<size
, big_endian
>::do_write(of
);
1800 reserve_ent(unsigned int cnt
= 1)
1802 if (this->header_ent_cnt_
== 0)
1804 if (this->num_entries() + cnt
> this->header_index_
)
1805 this->make_header();
1811 this->header_ent_cnt_
= 0;
1812 this->header_index_
= this->num_entries();
1815 Output_data_got
<size
, big_endian
>::add_constant(0);
1816 Output_data_got
<size
, big_endian
>::add_constant(0);
1817 Output_data_got
<size
, big_endian
>::add_constant(0);
1819 // Define _GLOBAL_OFFSET_TABLE_ at the header
1820 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1823 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
1824 sym
->set_value(this->g_o_t());
1827 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1828 Symbol_table::PREDEFINED
,
1829 this, this->g_o_t(), 0,
1832 elfcpp::STV_HIDDEN
, 0,
1836 Output_data_got
<size
, big_endian
>::add_constant(0);
1839 // Stashed pointers.
1840 Symbol_table
* symtab_
;
1844 unsigned int header_ent_cnt_
;
1845 // GOT header index.
1846 unsigned int header_index_
;
1849 // Get the GOT section, creating it if necessary.
1851 template<int size
, bool big_endian
>
1852 Output_data_got_powerpc
<size
, big_endian
>*
1853 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1856 if (this->got_
== NULL
)
1858 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1861 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1863 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1864 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1865 this->got_
, ORDER_DATA
, false);
1871 // Get the dynamic reloc section, creating it if necessary.
1873 template<int size
, bool big_endian
>
1874 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1875 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1877 if (this->rela_dyn_
== NULL
)
1879 gold_assert(layout
!= NULL
);
1880 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1881 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1882 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1883 ORDER_DYNAMIC_RELOCS
, false);
1885 return this->rela_dyn_
;
1891 // Determine the stub group size. The group size is the absolute
1892 // value of the parameter --stub-group-size. If --stub-group-size
1893 // is passed a negative value, we restrict stubs to be always before
1894 // the stubbed branches.
1895 Stub_control(int32_t size
)
1896 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
1897 stub14_group_size_(abs(size
)),
1898 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
1899 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
1901 if (stub_group_size_
== 1)
1904 if (stubs_always_before_branch_
)
1906 stub_group_size_
= 0x1e00000;
1907 stub14_group_size_
= 0x7800;
1911 stub_group_size_
= 0x1c00000;
1912 stub14_group_size_
= 0x7000;
1914 suppress_size_errors_
= true;
1918 // Return true iff input section can be handled by current stub
1921 can_add_to_stub_group(Output_section
* o
,
1922 const Output_section::Input_section
* i
,
1925 const Output_section::Input_section
*
1931 { return output_section_
; }
1937 FINDING_STUB_SECTION
,
1942 uint32_t stub_group_size_
;
1943 uint32_t stub14_group_size_
;
1944 bool stubs_always_before_branch_
;
1945 bool suppress_size_errors_
;
1946 uint64_t group_end_addr_
;
1947 const Output_section::Input_section
* owner_
;
1948 Output_section
* output_section_
;
1951 // Return true iff input section can be handled by current stub/
1955 Stub_control::can_add_to_stub_group(Output_section
* o
,
1956 const Output_section::Input_section
* i
,
1960 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
1961 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
1963 uint64_t start_addr
= o
->address();
1966 // .init and .fini sections are pasted together to form a single
1967 // function. We can't be adding stubs in the middle of the function.
1968 this_size
= o
->data_size();
1971 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
1972 this_size
= i
->data_size();
1974 uint64_t end_addr
= start_addr
+ this_size
;
1975 bool toobig
= this_size
> group_size
;
1977 if (toobig
&& !this->suppress_size_errors_
)
1978 gold_warning(_("%s:%s exceeds group size"),
1979 i
->relobj()->name().c_str(),
1980 i
->relobj()->section_name(i
->shndx()).c_str());
1982 if (this->state_
!= HAS_STUB_SECTION
1983 && (!whole_sec
|| this->output_section_
!= o
))
1986 this->output_section_
= o
;
1989 if (this->state_
== NO_GROUP
)
1991 this->state_
= FINDING_STUB_SECTION
;
1992 this->group_end_addr_
= end_addr
;
1994 else if (this->group_end_addr_
- start_addr
< group_size
)
1996 // Adding this section would make the group larger than GROUP_SIZE.
1997 else if (this->state_
== FINDING_STUB_SECTION
1998 && !this->stubs_always_before_branch_
2001 // But wait, there's more! Input sections up to GROUP_SIZE
2002 // bytes before the stub table can be handled by it too.
2003 this->state_
= HAS_STUB_SECTION
;
2004 this->group_end_addr_
= end_addr
;
2008 this->state_
= NO_GROUP
;
2014 // Look over all the input sections, deciding where to place stubs.
2016 template<int size
, bool big_endian
>
2018 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2021 Stub_control
stub_control(parameters
->options().stub_group_size());
2023 // Group input sections and insert stub table
2024 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
2025 Layout::Section_list section_list
;
2026 layout
->get_executable_sections(§ion_list
);
2027 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2028 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2029 o
!= section_list
.rend();
2032 typedef Output_section::Input_section_list Input_section_list
;
2033 for (Input_section_list::const_reverse_iterator i
2034 = (*o
)->input_sections().rbegin();
2035 i
!= (*o
)->input_sections().rend();
2038 if (i
->is_input_section())
2040 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2041 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2042 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2043 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2045 stub_table
->init(stub_control
.owner(),
2046 stub_control
.output_section());
2049 if (stub_table
== NULL
)
2050 stub_table
= this->new_stub_table();
2051 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
2055 if (stub_table
!= NULL
)
2056 stub_table
->init(stub_control
.owner(), stub_control
.output_section());
2059 // If this branch needs a plt call stub, or a long branch stub, make one.
2061 template<int size
, bool big_endian
>
2063 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2064 Stub_table
<size
, big_endian
>* stub_table
,
2065 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2066 Symbol_table
* symtab
) const
2068 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2069 if (sym
!= NULL
&& sym
->is_forwarder())
2070 sym
= symtab
->resolve_forwards(sym
);
2071 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2073 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(this->r_type_
))
2074 : this->object_
->local_has_plt_offset(this->r_sym_
))
2076 if (stub_table
== NULL
)
2077 stub_table
= this->object_
->stub_table(this->shndx_
);
2078 if (stub_table
== NULL
)
2080 // This is a ref from a data section to an ifunc symbol.
2081 stub_table
= ifunc_stub_table
;
2083 gold_assert(stub_table
!= NULL
);
2085 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2086 this->r_type_
, this->addend_
);
2088 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2089 this->r_type_
, this->addend_
);
2093 unsigned int max_branch_offset
;
2094 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2095 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2096 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2097 max_branch_offset
= 1 << 15;
2098 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2099 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2100 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2101 max_branch_offset
= 1 << 25;
2104 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2105 gold_assert(from
!= invalid_address
);
2106 from
+= (this->object_
->output_section(this->shndx_
)->address()
2111 switch (gsym
->source())
2113 case Symbol::FROM_OBJECT
:
2115 Object
* symobj
= gsym
->object();
2116 if (symobj
->is_dynamic()
2117 || symobj
->pluginobj() != NULL
)
2120 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2121 if (shndx
== elfcpp::SHN_UNDEF
)
2126 case Symbol::IS_UNDEFINED
:
2132 Symbol_table::Compute_final_value_status status
;
2133 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2134 if (status
!= Symbol_table::CFVS_OK
)
2139 const Symbol_value
<size
>* psymval
2140 = this->object_
->local_symbol(this->r_sym_
);
2141 Symbol_value
<size
> symval
;
2142 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2143 typename
ObjType::Compute_final_local_value_status status
2144 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2146 if (status
!= ObjType::CFLV_OK
2147 || !symval
.has_output_value())
2149 to
= symval
.value(this->object_
, 0);
2151 to
+= this->addend_
;
2152 if (stub_table
== NULL
)
2153 stub_table
= this->object_
->stub_table(this->shndx_
);
2154 gold_assert(stub_table
!= NULL
);
2155 if (size
== 64 && is_branch_reloc(this->r_type_
))
2157 unsigned int dest_shndx
;
2158 to
= stub_table
->targ()->symval_for_branch(to
, gsym
, this->object_
,
2161 Address delta
= to
- from
;
2162 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2164 stub_table
->add_long_branch_entry(this->object_
, to
);
2169 // Relaxation hook. This is where we do stub generation.
2171 template<int size
, bool big_endian
>
2173 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2174 const Input_objects
*,
2175 Symbol_table
* symtab
,
2179 unsigned int prev_brlt_size
= 0;
2182 bool thread_safe
= parameters
->options().plt_thread_safe();
2183 if (size
== 64 && !parameters
->options().user_set_plt_thread_safe())
2185 static const char* const thread_starter
[] =
2189 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2191 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2192 "mq_notify", "create_timer",
2196 "GOMP_parallel_start",
2197 "GOMP_parallel_loop_static_start",
2198 "GOMP_parallel_loop_dynamic_start",
2199 "GOMP_parallel_loop_guided_start",
2200 "GOMP_parallel_loop_runtime_start",
2201 "GOMP_parallel_sections_start",
2204 if (parameters
->options().shared())
2208 for (unsigned int i
= 0;
2209 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2212 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2213 thread_safe
= (sym
!= NULL
2215 && sym
->in_real_elf());
2221 this->plt_thread_safe_
= thread_safe
;
2222 this->group_sections(layout
, task
);
2225 // We need address of stub tables valid for make_stub.
2226 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2227 p
!= this->stub_tables_
.end();
2230 const Powerpc_relobj
<size
, big_endian
>* object
2231 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2232 Address off
= object
->get_output_section_offset((*p
)->shndx());
2233 gold_assert(off
!= invalid_address
);
2234 Output_section
* os
= (*p
)->output_section();
2235 (*p
)->set_address_and_size(os
, off
);
2240 // Clear plt call stubs, long branch stubs and branch lookup table.
2241 prev_brlt_size
= this->branch_lookup_table_
.size();
2242 this->branch_lookup_table_
.clear();
2243 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2244 p
!= this->stub_tables_
.end();
2247 (*p
)->clear_stubs();
2251 // Build all the stubs.
2252 Stub_table
<size
, big_endian
>* ifunc_stub_table
2253 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2254 Stub_table
<size
, big_endian
>* one_stub_table
2255 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2256 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2257 b
!= this->branch_info_
.end();
2260 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2263 // Did anything change size?
2264 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2265 bool again
= num_huge_branches
!= prev_brlt_size
;
2266 if (size
== 64 && num_huge_branches
!= 0)
2267 this->make_brlt_section(layout
);
2268 if (size
== 64 && again
)
2269 this->brlt_section_
->set_current_size(num_huge_branches
);
2271 typedef Unordered_set
<Output_section
*> Output_sections
;
2272 Output_sections os_need_update
;
2273 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2274 p
!= this->stub_tables_
.end();
2277 if ((*p
)->size_update())
2280 os_need_update
.insert((*p
)->output_section());
2284 // Set output section offsets for all input sections in an output
2285 // section that just changed size. Anything past the stubs will
2287 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2288 p
!= os_need_update
.end();
2291 Output_section
* os
= *p
;
2293 typedef Output_section::Input_section_list Input_section_list
;
2294 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2295 i
!= os
->input_sections().end();
2298 off
= align_address(off
, i
->addralign());
2299 if (i
->is_input_section() || i
->is_relaxed_input_section())
2300 i
->relobj()->set_section_offset(i
->shndx(), off
);
2301 if (i
->is_relaxed_input_section())
2303 Stub_table
<size
, big_endian
>* stub_table
2304 = static_cast<Stub_table
<size
, big_endian
>*>(
2305 i
->relaxed_input_section());
2306 off
+= stub_table
->set_address_and_size(os
, off
);
2309 off
+= i
->data_size();
2311 // If .brlt is part of this output section, then we have just
2312 // done the offset adjustment.
2313 os
->clear_section_offsets_need_adjustment();
2318 && num_huge_branches
!= 0
2319 && parameters
->options().output_is_position_independent())
2321 // Fill in the BRLT relocs.
2322 this->brlt_section_
->reset_data_size();
2323 for (typename
Branch_lookup_table::const_iterator p
2324 = this->branch_lookup_table_
.begin();
2325 p
!= this->branch_lookup_table_
.end();
2328 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2330 this->brlt_section_
->finalize_data_size();
2335 // A class to handle the PLT data.
2337 template<int size
, bool big_endian
>
2338 class Output_data_plt_powerpc
: public Output_section_data_build
2341 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2342 size
, big_endian
> Reloc_section
;
2344 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2345 Reloc_section
* plt_rel
,
2346 unsigned int reserved_size
,
2348 : Output_section_data_build(size
== 32 ? 4 : 8),
2351 initial_plt_entry_size_(reserved_size
),
2355 // Add an entry to the PLT.
2360 add_ifunc_entry(Symbol
*);
2363 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2365 // Return the .rela.plt section data.
2372 // Return the number of PLT entries.
2376 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2380 // Return the offset of the first non-reserved PLT entry.
2382 first_plt_entry_offset()
2383 { return this->initial_plt_entry_size_
; }
2385 // Return the size of a PLT entry.
2387 get_plt_entry_size()
2388 { return plt_entry_size
; }
2392 do_adjust_output_section(Output_section
* os
)
2397 // Write to a map file.
2399 do_print_to_mapfile(Mapfile
* mapfile
) const
2400 { mapfile
->print_output_data(this, this->name_
); }
2403 // The size of an entry in the PLT.
2404 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2406 // Write out the PLT data.
2408 do_write(Output_file
*);
2410 // The reloc section.
2411 Reloc_section
* rel_
;
2412 // Allows access to .glink for do_write.
2413 Target_powerpc
<size
, big_endian
>* targ_
;
2414 // The size of the first reserved entry.
2415 int initial_plt_entry_size_
;
2416 // What to report in map file.
2420 // Add an entry to the PLT.
2422 template<int size
, bool big_endian
>
2424 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2426 if (!gsym
->has_plt_offset())
2428 section_size_type off
= this->current_data_size();
2430 off
+= this->first_plt_entry_offset();
2431 gsym
->set_plt_offset(off
);
2432 gsym
->set_needs_dynsym_entry();
2433 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2434 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2435 off
+= plt_entry_size
;
2436 this->set_current_data_size(off
);
2440 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2442 template<int size
, bool big_endian
>
2444 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2446 if (!gsym
->has_plt_offset())
2448 section_size_type off
= this->current_data_size();
2449 gsym
->set_plt_offset(off
);
2450 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2452 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2453 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2454 off
+= plt_entry_size
;
2455 this->set_current_data_size(off
);
2459 // Add an entry for a local ifunc symbol to the IPLT.
2461 template<int size
, bool big_endian
>
2463 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2464 Sized_relobj_file
<size
, big_endian
>* relobj
,
2465 unsigned int local_sym_index
)
2467 if (!relobj
->local_has_plt_offset(local_sym_index
))
2469 section_size_type off
= this->current_data_size();
2470 relobj
->set_local_plt_offset(local_sym_index
, off
);
2471 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2473 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2474 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2476 off
+= plt_entry_size
;
2477 this->set_current_data_size(off
);
2481 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2482 static const uint32_t add_2_2_11
= 0x7c425a14;
2483 static const uint32_t add_3_3_2
= 0x7c631214;
2484 static const uint32_t add_3_3_13
= 0x7c636a14;
2485 static const uint32_t add_11_0_11
= 0x7d605a14;
2486 static const uint32_t add_12_2_11
= 0x7d825a14;
2487 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2488 static const uint32_t addi_11_11
= 0x396b0000;
2489 static const uint32_t addi_12_12
= 0x398c0000;
2490 static const uint32_t addi_2_2
= 0x38420000;
2491 static const uint32_t addi_3_2
= 0x38620000;
2492 static const uint32_t addi_3_3
= 0x38630000;
2493 static const uint32_t addis_0_2
= 0x3c020000;
2494 static const uint32_t addis_0_13
= 0x3c0d0000;
2495 static const uint32_t addis_11_11
= 0x3d6b0000;
2496 static const uint32_t addis_11_30
= 0x3d7e0000;
2497 static const uint32_t addis_12_12
= 0x3d8c0000;
2498 static const uint32_t addis_12_2
= 0x3d820000;
2499 static const uint32_t addis_3_2
= 0x3c620000;
2500 static const uint32_t addis_3_13
= 0x3c6d0000;
2501 static const uint32_t b
= 0x48000000;
2502 static const uint32_t bcl_20_31
= 0x429f0005;
2503 static const uint32_t bctr
= 0x4e800420;
2504 static const uint32_t blr
= 0x4e800020;
2505 static const uint32_t blrl
= 0x4e800021;
2506 static const uint32_t bnectr_p4
= 0x4ce20420;
2507 static const uint32_t cmpldi_2_0
= 0x28220000;
2508 static const uint32_t cror_15_15_15
= 0x4def7b82;
2509 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2510 static const uint32_t ld_0_1
= 0xe8010000;
2511 static const uint32_t ld_0_12
= 0xe80c0000;
2512 static const uint32_t ld_11_12
= 0xe96c0000;
2513 static const uint32_t ld_11_2
= 0xe9620000;
2514 static const uint32_t ld_2_1
= 0xe8410000;
2515 static const uint32_t ld_2_11
= 0xe84b0000;
2516 static const uint32_t ld_2_12
= 0xe84c0000;
2517 static const uint32_t ld_2_2
= 0xe8420000;
2518 static const uint32_t lfd_0_1
= 0xc8010000;
2519 static const uint32_t li_0_0
= 0x38000000;
2520 static const uint32_t li_12_0
= 0x39800000;
2521 static const uint32_t lis_0_0
= 0x3c000000;
2522 static const uint32_t lis_11
= 0x3d600000;
2523 static const uint32_t lis_12
= 0x3d800000;
2524 static const uint32_t lwz_0_12
= 0x800c0000;
2525 static const uint32_t lwz_11_11
= 0x816b0000;
2526 static const uint32_t lwz_11_30
= 0x817e0000;
2527 static const uint32_t lwz_12_12
= 0x818c0000;
2528 static const uint32_t lwzu_0_12
= 0x840c0000;
2529 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2530 static const uint32_t mflr_0
= 0x7c0802a6;
2531 static const uint32_t mflr_11
= 0x7d6802a6;
2532 static const uint32_t mflr_12
= 0x7d8802a6;
2533 static const uint32_t mtctr_0
= 0x7c0903a6;
2534 static const uint32_t mtctr_11
= 0x7d6903a6;
2535 static const uint32_t mtctr_12
= 0x7d8903a6;
2536 static const uint32_t mtlr_0
= 0x7c0803a6;
2537 static const uint32_t mtlr_12
= 0x7d8803a6;
2538 static const uint32_t nop
= 0x60000000;
2539 static const uint32_t ori_0_0_0
= 0x60000000;
2540 static const uint32_t std_0_1
= 0xf8010000;
2541 static const uint32_t std_0_12
= 0xf80c0000;
2542 static const uint32_t std_2_1
= 0xf8410000;
2543 static const uint32_t stfd_0_1
= 0xd8010000;
2544 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2545 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2546 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2548 // Write out the PLT.
2550 template<int size
, bool big_endian
>
2552 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2556 const section_size_type offset
= this->offset();
2557 const section_size_type oview_size
2558 = convert_to_section_size_type(this->data_size());
2559 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2560 unsigned char* pov
= oview
;
2561 unsigned char* endpov
= oview
+ oview_size
;
2563 // The address of the .glink branch table
2564 const Output_data_glink
<size
, big_endian
>* glink
2565 = this->targ_
->glink_section();
2566 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2568 while (pov
< endpov
)
2570 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2575 of
->write_output_view(offset
, oview_size
, oview
);
2579 // Create the PLT section.
2581 template<int size
, bool big_endian
>
2583 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2586 if (this->plt_
== NULL
)
2588 if (this->got_
== NULL
)
2589 this->got_section(symtab
, layout
);
2591 if (this->glink_
== NULL
)
2592 make_glink_section(layout
);
2594 // Ensure that .rela.dyn always appears before .rela.plt This is
2595 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2596 // needs to include .rela.plt in it's range.
2597 this->rela_dyn_section(layout
);
2599 Reloc_section
* plt_rel
= new Reloc_section(false);
2600 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2601 elfcpp::SHF_ALLOC
, plt_rel
,
2602 ORDER_DYNAMIC_PLT_RELOCS
, false);
2604 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2605 size
== 32 ? 0 : 24,
2607 layout
->add_output_section_data(".plt",
2609 ? elfcpp::SHT_PROGBITS
2610 : elfcpp::SHT_NOBITS
),
2611 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2620 // Create the IPLT section.
2622 template<int size
, bool big_endian
>
2624 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2627 if (this->iplt_
== NULL
)
2629 this->make_plt_section(symtab
, layout
);
2631 Reloc_section
* iplt_rel
= new Reloc_section(false);
2632 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2634 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2636 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
2640 // A section for huge long branch addresses, similar to plt section.
2642 template<int size
, bool big_endian
>
2643 class Output_data_brlt_powerpc
: public Output_section_data_build
2646 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2647 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2648 size
, big_endian
> Reloc_section
;
2650 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2651 Reloc_section
* brlt_rel
)
2652 : Output_section_data_build(size
== 32 ? 4 : 8),
2657 // Add a reloc for an entry in the BRLT.
2659 add_reloc(Address to
, unsigned int off
)
2660 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
2662 // Update section and reloc section size.
2664 set_current_size(unsigned int num_branches
)
2666 this->reset_address_and_file_offset();
2667 this->set_current_data_size(num_branches
* 16);
2668 this->finalize_data_size();
2669 Output_section
* os
= this->output_section();
2670 os
->set_section_offsets_need_adjustment();
2671 if (this->rel_
!= NULL
)
2673 unsigned int reloc_size
2674 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
2675 this->rel_
->reset_address_and_file_offset();
2676 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
2677 this->rel_
->finalize_data_size();
2678 Output_section
* os
= this->rel_
->output_section();
2679 os
->set_section_offsets_need_adjustment();
2685 do_adjust_output_section(Output_section
* os
)
2690 // Write to a map file.
2692 do_print_to_mapfile(Mapfile
* mapfile
) const
2693 { mapfile
->print_output_data(this, "** BRLT"); }
2696 // Write out the BRLT data.
2698 do_write(Output_file
*);
2700 // The reloc section.
2701 Reloc_section
* rel_
;
2702 Target_powerpc
<size
, big_endian
>* targ_
;
2705 // Make the branch lookup table section.
2707 template<int size
, bool big_endian
>
2709 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
2711 if (size
== 64 && this->brlt_section_
== NULL
)
2713 Reloc_section
* brlt_rel
= NULL
;
2714 bool is_pic
= parameters
->options().output_is_position_independent();
2717 // When PIC we can't fill in .brlt (like .plt it can be a
2718 // bss style section) but must initialise at runtime via
2719 // dynamic relocats.
2720 this->rela_dyn_section(layout
);
2721 brlt_rel
= new Reloc_section(false);
2722 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
2725 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
2726 if (this->plt_
&& is_pic
)
2727 this->plt_
->output_section()
2728 ->add_output_section_data(this->brlt_section_
);
2730 layout
->add_output_section_data(".brlt",
2731 (is_pic
? elfcpp::SHT_NOBITS
2732 : elfcpp::SHT_PROGBITS
),
2733 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2734 this->brlt_section_
,
2735 (is_pic
? ORDER_SMALL_BSS
2736 : ORDER_SMALL_DATA
),
2741 // Write out .brlt when non-PIC.
2743 template<int size
, bool big_endian
>
2745 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2747 if (size
== 64 && !parameters
->options().output_is_position_independent())
2749 const section_size_type offset
= this->offset();
2750 const section_size_type oview_size
2751 = convert_to_section_size_type(this->data_size());
2752 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2754 this->targ_
->write_branch_lookup_table(oview
);
2755 of
->write_output_view(offset
, oview_size
, oview
);
2759 static inline uint32_t
2765 static inline uint32_t
2771 static inline uint32_t
2774 return hi(a
+ 0x8000);
2777 template<bool big_endian
>
2779 write_insn(unsigned char* p
, uint32_t v
)
2781 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2784 // Stub_table holds information about plt and long branch stubs.
2785 // Stubs are built in an area following some input section determined
2786 // by group_sections(). This input section is converted to a relaxed
2787 // input section allowing it to be resized to accommodate the stubs
2789 template<int size
, bool big_endian
>
2790 class Stub_table
: public Output_relaxed_input_section
2793 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2794 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2796 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
2797 : Output_relaxed_input_section(NULL
, 0, 0),
2798 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
2799 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2800 branch_size_(0), last_branch_size_(0)
2803 // Delayed Output_relaxed_input_section init.
2805 init(const Output_section::Input_section
*, Output_section
*);
2807 // Add a plt call stub.
2809 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2815 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2820 // Find a given plt call stub.
2822 find_plt_call_entry(const Symbol
*) const;
2825 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2826 unsigned int) const;
2829 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2835 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2840 // Add a long branch stub.
2842 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2845 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2850 this->plt_call_stubs_
.clear();
2851 this->plt_size_
= 0;
2852 this->long_branch_stubs_
.clear();
2853 this->branch_size_
= 0;
2857 set_address_and_size(const Output_section
* os
, Address off
)
2859 Address start_off
= off
;
2860 off
+= this->orig_data_size_
;
2861 Address my_size
= this->plt_size_
+ this->branch_size_
;
2863 off
= align_address(off
, this->stub_align());
2864 // Include original section size and alignment padding in size
2865 my_size
+= off
- start_off
;
2866 this->reset_address_and_file_offset();
2867 this->set_current_data_size(my_size
);
2868 this->set_address_and_file_offset(os
->address() + start_off
,
2869 os
->offset() + start_off
);
2876 return align_address(this->address() + this->orig_data_size_
,
2877 this->stub_align());
2883 return align_address(this->offset() + this->orig_data_size_
,
2884 this->stub_align());
2889 { return this->plt_size_
; }
2894 Output_section
* os
= this->output_section();
2895 if (os
->addralign() < this->stub_align())
2897 os
->set_addralign(this->stub_align());
2898 // FIXME: get rid of the insane checkpointing.
2899 // We can't increase alignment of the input section to which
2900 // stubs are attached; The input section may be .init which
2901 // is pasted together with other .init sections to form a
2902 // function. Aligning might insert zero padding resulting in
2903 // sigill. However we do need to increase alignment of the
2904 // output section so that the align_address() on offset in
2905 // set_address_and_size() adds the same padding as the
2906 // align_address() on address in stub_address().
2907 // What's more, we need this alignment for the layout done in
2908 // relaxation_loop_body() so that the output section starts at
2909 // a suitably aligned address.
2910 os
->checkpoint_set_addralign(this->stub_align());
2912 if (this->last_plt_size_
!= this->plt_size_
2913 || this->last_branch_size_
!= this->branch_size_
)
2915 this->last_plt_size_
= this->plt_size_
;
2916 this->last_branch_size_
= this->branch_size_
;
2922 Target_powerpc
<size
, big_endian
>*
2928 class Plt_stub_ent_hash
;
2929 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
2930 Plt_stub_ent_hash
> Plt_stub_entries
;
2932 // Alignment of stub section.
2938 unsigned int min_align
= 32;
2939 unsigned int user_align
= 1 << parameters
->options().plt_align();
2940 return std::max(user_align
, min_align
);
2943 // Size of a given plt call stub.
2945 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
2950 Address pltaddr
= p
->second
;
2951 if (p
->first
.sym_
== NULL
2952 || (p
->first
.sym_
->type() == elfcpp::STT_GNU_IFUNC
2953 && p
->first
.sym_
->can_use_relative_reloc(false)))
2954 pltaddr
+= this->targ_
->iplt_section()->address();
2956 pltaddr
+= this->targ_
->plt_section()->address();
2957 Address tocbase
= this->targ_
->got_section()->output_section()->address();
2958 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2959 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
2960 tocbase
+= ppcobj
->toc_base_offset();
2961 Address off
= pltaddr
- tocbase
;
2962 bool static_chain
= parameters
->options().plt_static_chain();
2963 bool thread_safe
= this->targ_
->plt_thread_safe();
2964 unsigned int bytes
= (4 * 5
2967 + 4 * (ha(off
) != 0)
2968 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
2969 unsigned int align
= 1 << parameters
->options().plt_align();
2971 bytes
= (bytes
+ align
- 1) & -align
;
2975 // Return long branch stub size.
2977 branch_stub_size(Address to
)
2980 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
2981 if (to
- loc
+ (1 << 25) < 2 << 25)
2983 if (size
== 64 || !parameters
->options().output_is_position_independent())
2990 do_write(Output_file
*);
2992 // Plt call stub keys.
2996 Plt_stub_ent(const Symbol
* sym
)
2997 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3000 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3001 unsigned int locsym_index
)
3002 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3005 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3007 unsigned int r_type
,
3009 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3012 this->addend_
= addend
;
3013 else if (parameters
->options().output_is_position_independent()
3014 && r_type
== elfcpp::R_PPC_PLTREL24
)
3016 this->addend_
= addend
;
3017 if (this->addend_
>= 32768)
3018 this->object_
= object
;
3022 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3023 unsigned int locsym_index
,
3024 unsigned int r_type
,
3026 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3029 this->addend_
= addend
;
3030 else if (parameters
->options().output_is_position_independent()
3031 && r_type
== elfcpp::R_PPC_PLTREL24
)
3032 this->addend_
= addend
;
3035 bool operator==(const Plt_stub_ent
& that
) const
3037 return (this->sym_
== that
.sym_
3038 && this->object_
== that
.object_
3039 && this->addend_
== that
.addend_
3040 && this->locsym_
== that
.locsym_
);
3044 const Sized_relobj_file
<size
, big_endian
>* object_
;
3045 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3046 unsigned int locsym_
;
3049 class Plt_stub_ent_hash
3052 size_t operator()(const Plt_stub_ent
& ent
) const
3054 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3055 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3061 // Long branch stub keys.
3062 class Branch_stub_ent
3065 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3066 : dest_(to
), toc_base_off_(0)
3069 toc_base_off_
= obj
->toc_base_offset();
3072 bool operator==(const Branch_stub_ent
& that
) const
3074 return (this->dest_
== that
.dest_
3076 || this->toc_base_off_
== that
.toc_base_off_
));
3080 unsigned int toc_base_off_
;
3083 class Branch_stub_ent_hash
3086 size_t operator()(const Branch_stub_ent
& ent
) const
3087 { return ent
.dest_
^ ent
.toc_base_off_
; }
3090 // In a sane world this would be a global.
3091 Target_powerpc
<size
, big_endian
>* targ_
;
3092 // Map sym/object/addend to stub offset.
3093 Plt_stub_entries plt_call_stubs_
;
3094 // Map destination address to stub offset.
3095 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3096 Branch_stub_ent_hash
> Branch_stub_entries
;
3097 Branch_stub_entries long_branch_stubs_
;
3098 // size of input section
3099 section_size_type orig_data_size_
;
3101 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3104 // Make a new stub table, and record.
3106 template<int size
, bool big_endian
>
3107 Stub_table
<size
, big_endian
>*
3108 Target_powerpc
<size
, big_endian
>::new_stub_table()
3110 Stub_table
<size
, big_endian
>* stub_table
3111 = new Stub_table
<size
, big_endian
>(this);
3112 this->stub_tables_
.push_back(stub_table
);
3116 // Delayed stub table initialisation, because we create the stub table
3117 // before we know to which section it will be attached.
3119 template<int size
, bool big_endian
>
3121 Stub_table
<size
, big_endian
>::init(
3122 const Output_section::Input_section
* owner
,
3123 Output_section
* output_section
)
3125 this->set_relobj(owner
->relobj());
3126 this->set_shndx(owner
->shndx());
3127 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3128 this->set_output_section(output_section
);
3129 this->orig_data_size_
= owner
->current_data_size();
3131 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3132 new_relaxed
.push_back(this);
3133 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3136 // Add a plt call stub, if we do not already have one for this
3137 // sym/object/addend combo.
3139 template<int size
, bool big_endian
>
3141 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3142 const Sized_relobj_file
<size
, big_endian
>* object
,
3144 unsigned int r_type
,
3147 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3148 Address off
= this->plt_size_
;
3149 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3150 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3152 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3155 template<int size
, bool big_endian
>
3157 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3158 const Sized_relobj_file
<size
, big_endian
>* object
,
3159 unsigned int locsym_index
,
3160 unsigned int r_type
,
3163 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3164 Address off
= this->plt_size_
;
3165 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3166 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3168 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3171 // Find a plt call stub.
3173 template<int size
, bool big_endian
>
3174 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3175 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3176 const Sized_relobj_file
<size
, big_endian
>* object
,
3178 unsigned int r_type
,
3179 Address addend
) const
3181 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3182 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3183 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3186 template<int size
, bool big_endian
>
3187 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3188 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3190 Plt_stub_ent
ent(gsym
);
3191 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3192 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3195 template<int size
, bool big_endian
>
3196 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3197 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3198 const Sized_relobj_file
<size
, big_endian
>* object
,
3199 unsigned int locsym_index
,
3200 unsigned int r_type
,
3201 Address addend
) const
3203 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3204 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3205 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3208 template<int size
, bool big_endian
>
3209 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3210 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3211 const Sized_relobj_file
<size
, big_endian
>* object
,
3212 unsigned int locsym_index
) const
3214 Plt_stub_ent
ent(object
, locsym_index
);
3215 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3216 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3219 // Add a long branch stub if we don't already have one to given
3222 template<int size
, bool big_endian
>
3224 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3225 const Powerpc_relobj
<size
, big_endian
>* object
,
3228 Branch_stub_ent
ent(object
, to
);
3229 Address off
= this->branch_size_
;
3230 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3232 unsigned int stub_size
= this->branch_stub_size(to
);
3233 this->branch_size_
= off
+ stub_size
;
3234 if (size
== 64 && stub_size
!= 4)
3235 this->targ_
->add_branch_lookup_table(to
);
3239 // Find long branch stub.
3241 template<int size
, bool big_endian
>
3242 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3243 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3244 const Powerpc_relobj
<size
, big_endian
>* object
,
3247 Branch_stub_ent
ent(object
, to
);
3248 typename
Branch_stub_entries::const_iterator p
3249 = this->long_branch_stubs_
.find(ent
);
3250 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3253 // A class to handle .glink.
3255 template<int size
, bool big_endian
>
3256 class Output_data_glink
: public Output_section_data
3259 static const int pltresolve_size
= 16*4;
3261 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3262 : Output_section_data(16), targ_(targ
)
3266 // Write to a map file.
3268 do_print_to_mapfile(Mapfile
* mapfile
) const
3269 { mapfile
->print_output_data(this, _("** glink")); }
3273 set_final_data_size();
3277 do_write(Output_file
*);
3279 // Allows access to .got and .plt for do_write.
3280 Target_powerpc
<size
, big_endian
>* targ_
;
3283 template<int size
, bool big_endian
>
3285 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3287 unsigned int count
= this->targ_
->plt_entry_count();
3288 section_size_type total
= 0;
3294 // space for branch table
3295 total
+= 4 * (count
- 1);
3297 total
+= -total
& 15;
3298 total
+= this->pltresolve_size
;
3302 total
+= this->pltresolve_size
;
3304 // space for branch table
3307 total
+= 4 * (count
- 0x8000);
3311 this->set_data_size(total
);
3314 // Write out plt and long branch stub code.
3316 template<int size
, bool big_endian
>
3318 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3320 if (this->plt_call_stubs_
.empty()
3321 && this->long_branch_stubs_
.empty())
3324 const section_size_type start_off
= this->offset();
3325 const section_size_type off
= this->stub_offset();
3326 const section_size_type oview_size
=
3327 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3328 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3333 const Output_data_got_powerpc
<size
, big_endian
>* got
3334 = this->targ_
->got_section();
3335 Address got_os_addr
= got
->output_section()->address();
3337 if (!this->plt_call_stubs_
.empty())
3339 // The base address of the .plt section.
3340 Address plt_base
= this->targ_
->plt_section()->address();
3341 Address iplt_base
= invalid_address
;
3343 // Write out plt call stubs.
3344 typename
Plt_stub_entries::const_iterator cs
;
3345 for (cs
= this->plt_call_stubs_
.begin();
3346 cs
!= this->plt_call_stubs_
.end();
3351 const Symbol
* gsym
= cs
->first
.sym_
;
3354 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3355 && gsym
->can_use_relative_reloc(false));
3356 pltoff
= gsym
->plt_offset();
3361 const Sized_relobj_file
<size
, big_endian
>* relobj
3362 = cs
->first
.object_
;
3363 unsigned int local_sym_index
= cs
->first
.locsym_
;
3364 pltoff
= relobj
->local_plt_offset(local_sym_index
);
3366 Address plt_addr
= pltoff
;
3369 if (iplt_base
== invalid_address
)
3370 iplt_base
= this->targ_
->iplt_section()->address();
3371 plt_addr
+= iplt_base
;
3374 plt_addr
+= plt_base
;
3375 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3376 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3377 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3378 Address off
= plt_addr
- got_addr
;
3380 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3381 gold_error(_("%s: linkage table error against `%s'"),
3382 cs
->first
.object_
->name().c_str(),
3383 cs
->first
.sym_
->demangled_name().c_str());
3385 bool static_chain
= parameters
->options().plt_static_chain();
3386 bool thread_safe
= this->targ_
->plt_thread_safe();
3387 bool use_fake_dep
= false;
3388 Address cmp_branch_off
= 0;
3391 unsigned int pltindex
3392 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3393 / this->targ_
->plt_entry_size());
3395 = (this->targ_
->glink_section()->pltresolve_size
3397 if (pltindex
> 32768)
3398 glinkoff
+= (pltindex
- 32768) * 4;
3400 = this->targ_
->glink_section()->address() + glinkoff
;
3402 = (this->stub_address() + cs
->second
+ 24
3403 + 4 * (ha(off
) != 0)
3404 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3405 + 4 * static_chain
);
3406 cmp_branch_off
= to
- from
;
3407 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3410 p
= oview
+ cs
->second
;
3413 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3414 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3415 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3416 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3418 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3421 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3424 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3425 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3427 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3429 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3433 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3434 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3435 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3437 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3440 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3443 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3444 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3447 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3448 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3450 if (thread_safe
&& !use_fake_dep
)
3452 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3453 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3454 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3457 write_insn
<big_endian
>(p
, bctr
);
3461 // Write out long branch stubs.
3462 typename
Branch_stub_entries::const_iterator bs
;
3463 for (bs
= this->long_branch_stubs_
.begin();
3464 bs
!= this->long_branch_stubs_
.end();
3467 p
= oview
+ this->plt_size_
+ bs
->second
;
3468 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3469 Address delta
= bs
->first
.dest_
- loc
;
3470 if (delta
+ (1 << 25) < 2 << 25)
3471 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3475 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3476 gold_assert(brlt_addr
!= invalid_address
);
3477 brlt_addr
+= this->targ_
->brlt_section()->address();
3478 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3479 Address brltoff
= brlt_addr
- got_addr
;
3480 if (ha(brltoff
) == 0)
3482 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3486 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3487 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3489 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3490 write_insn
<big_endian
>(p
, bctr
);
3496 if (!this->plt_call_stubs_
.empty())
3498 // The base address of the .plt section.
3499 Address plt_base
= this->targ_
->plt_section()->address();
3500 Address iplt_base
= invalid_address
;
3501 // The address of _GLOBAL_OFFSET_TABLE_.
3502 Address g_o_t
= invalid_address
;
3504 // Write out plt call stubs.
3505 typename
Plt_stub_entries::const_iterator cs
;
3506 for (cs
= this->plt_call_stubs_
.begin();
3507 cs
!= this->plt_call_stubs_
.end();
3512 const Symbol
* gsym
= cs
->first
.sym_
;
3515 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3516 && gsym
->can_use_relative_reloc(false));
3517 plt_addr
= gsym
->plt_offset();
3522 const Sized_relobj_file
<size
, big_endian
>* relobj
3523 = cs
->first
.object_
;
3524 unsigned int local_sym_index
= cs
->first
.locsym_
;
3525 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
3529 if (iplt_base
== invalid_address
)
3530 iplt_base
= this->targ_
->iplt_section()->address();
3531 plt_addr
+= iplt_base
;
3534 plt_addr
+= plt_base
;
3536 p
= oview
+ cs
->second
;
3537 if (parameters
->options().output_is_position_independent())
3540 const Powerpc_relobj
<size
, big_endian
>* ppcobj
3541 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
3542 (cs
->first
.object_
));
3543 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
3545 unsigned int got2
= ppcobj
->got2_shndx();
3546 got_addr
= ppcobj
->get_output_section_offset(got2
);
3547 gold_assert(got_addr
!= invalid_address
);
3548 got_addr
+= (ppcobj
->output_section(got2
)->address()
3549 + cs
->first
.addend_
);
3553 if (g_o_t
== invalid_address
)
3555 const Output_data_got_powerpc
<size
, big_endian
>* got
3556 = this->targ_
->got_section();
3557 g_o_t
= got
->address() + got
->g_o_t();
3562 Address off
= plt_addr
- got_addr
;
3565 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
3566 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
3567 write_insn
<big_endian
>(p
+ 8, bctr
);
3571 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
3572 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
3573 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3574 write_insn
<big_endian
>(p
+ 12, bctr
);
3579 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
3580 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
3581 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3582 write_insn
<big_endian
>(p
+ 12, bctr
);
3587 // Write out long branch stubs.
3588 typename
Branch_stub_entries::const_iterator bs
;
3589 for (bs
= this->long_branch_stubs_
.begin();
3590 bs
!= this->long_branch_stubs_
.end();
3593 p
= oview
+ this->plt_size_
+ bs
->second
;
3594 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3595 Address delta
= bs
->first
.dest_
- loc
;
3596 if (delta
+ (1 << 25) < 2 << 25)
3597 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3598 else if (!parameters
->options().output_is_position_independent())
3600 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
3601 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
3602 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
3603 write_insn
<big_endian
>(p
+ 12, bctr
);
3608 write_insn
<big_endian
>(p
+ 0, mflr_0
);
3609 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
3610 write_insn
<big_endian
>(p
+ 8, mflr_12
);
3611 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
3612 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
3613 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3614 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
3615 write_insn
<big_endian
>(p
+ 28, bctr
);
3621 // Write out .glink.
3623 template<int size
, bool big_endian
>
3625 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
3627 const section_size_type off
= this->offset();
3628 const section_size_type oview_size
=
3629 convert_to_section_size_type(this->data_size());
3630 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3633 // The base address of the .plt section.
3634 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3635 Address plt_base
= this->targ_
->plt_section()->address();
3639 // Write pltresolve stub.
3641 Address after_bcl
= this->address() + 16;
3642 Address pltoff
= plt_base
- after_bcl
;
3644 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
3646 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
3647 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
3648 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
3649 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
3650 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
3651 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
3652 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
3653 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
3654 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3655 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
3656 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
3657 while (p
< oview
+ this->pltresolve_size
)
3658 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3660 // Write lazy link call stubs.
3662 while (p
< oview
+ oview_size
)
3666 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
3670 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
3671 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
3673 uint32_t branch_off
= 8 - (p
- oview
);
3674 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
3680 const Output_data_got_powerpc
<size
, big_endian
>* got
3681 = this->targ_
->got_section();
3682 // The address of _GLOBAL_OFFSET_TABLE_.
3683 Address g_o_t
= got
->address() + got
->g_o_t();
3685 // Write out pltresolve branch table.
3687 unsigned int the_end
= oview_size
- this->pltresolve_size
;
3688 unsigned char* end_p
= oview
+ the_end
;
3689 while (p
< end_p
- 8 * 4)
3690 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
3692 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3694 // Write out pltresolve call stub.
3695 if (parameters
->options().output_is_position_independent())
3697 Address res0_off
= 0;
3698 Address after_bcl_off
= the_end
+ 12;
3699 Address bcl_res0
= after_bcl_off
- res0_off
;
3701 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
3702 write_insn
<big_endian
>(p
+ 4, mflr_0
);
3703 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
3704 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
3705 write_insn
<big_endian
>(p
+ 16, mflr_12
);
3706 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3707 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
3709 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
3711 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
3712 if (ha(got_bcl
) == ha(got_bcl
+ 4))
3714 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
3715 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
3719 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
3720 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
3722 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
3723 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
3724 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
3725 write_insn
<big_endian
>(p
+ 52, bctr
);
3726 write_insn
<big_endian
>(p
+ 56, nop
);
3727 write_insn
<big_endian
>(p
+ 60, nop
);
3731 Address res0
= this->address();
3733 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
3734 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
3735 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3736 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
3738 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
3739 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
3740 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
3741 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
3742 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3743 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
3745 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
3746 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
3747 write_insn
<big_endian
>(p
+ 32, bctr
);
3748 write_insn
<big_endian
>(p
+ 36, nop
);
3749 write_insn
<big_endian
>(p
+ 40, nop
);
3750 write_insn
<big_endian
>(p
+ 44, nop
);
3751 write_insn
<big_endian
>(p
+ 48, nop
);
3752 write_insn
<big_endian
>(p
+ 52, nop
);
3753 write_insn
<big_endian
>(p
+ 56, nop
);
3754 write_insn
<big_endian
>(p
+ 60, nop
);
3759 of
->write_output_view(off
, oview_size
, oview
);
3763 // A class to handle linker generated save/restore functions.
3765 template<int size
, bool big_endian
>
3766 class Output_data_save_res
: public Output_section_data_build
3769 Output_data_save_res(Symbol_table
* symtab
);
3772 // Write to a map file.
3774 do_print_to_mapfile(Mapfile
* mapfile
) const
3775 { mapfile
->print_output_data(this, _("** save/restore")); }
3778 do_write(Output_file
*);
3781 // The maximum size of save/restore contents.
3782 static const unsigned int savres_max
= 218*4;
3785 savres_define(Symbol_table
* symtab
,
3787 unsigned int lo
, unsigned int hi
,
3788 unsigned char* write_ent(unsigned char*, int),
3789 unsigned char* write_tail(unsigned char*, int));
3791 unsigned char *contents_
;
3794 template<bool big_endian
>
3795 static unsigned char*
3796 savegpr0(unsigned char* p
, int r
)
3798 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3799 write_insn
<big_endian
>(p
, insn
);
3803 template<bool big_endian
>
3804 static unsigned char*
3805 savegpr0_tail(unsigned char* p
, int r
)
3807 p
= savegpr0
<big_endian
>(p
, r
);
3808 uint32_t insn
= std_0_1
+ 16;
3809 write_insn
<big_endian
>(p
, insn
);
3811 write_insn
<big_endian
>(p
, blr
);
3815 template<bool big_endian
>
3816 static unsigned char*
3817 restgpr0(unsigned char* p
, int r
)
3819 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3820 write_insn
<big_endian
>(p
, insn
);
3824 template<bool big_endian
>
3825 static unsigned char*
3826 restgpr0_tail(unsigned char* p
, int r
)
3828 uint32_t insn
= ld_0_1
+ 16;
3829 write_insn
<big_endian
>(p
, insn
);
3831 p
= restgpr0
<big_endian
>(p
, r
);
3832 write_insn
<big_endian
>(p
, mtlr_0
);
3836 p
= restgpr0
<big_endian
>(p
, 30);
3837 p
= restgpr0
<big_endian
>(p
, 31);
3839 write_insn
<big_endian
>(p
, blr
);
3843 template<bool big_endian
>
3844 static unsigned char*
3845 savegpr1(unsigned char* p
, int r
)
3847 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3848 write_insn
<big_endian
>(p
, insn
);
3852 template<bool big_endian
>
3853 static unsigned char*
3854 savegpr1_tail(unsigned char* p
, int r
)
3856 p
= savegpr1
<big_endian
>(p
, r
);
3857 write_insn
<big_endian
>(p
, blr
);
3861 template<bool big_endian
>
3862 static unsigned char*
3863 restgpr1(unsigned char* p
, int r
)
3865 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3866 write_insn
<big_endian
>(p
, insn
);
3870 template<bool big_endian
>
3871 static unsigned char*
3872 restgpr1_tail(unsigned char* p
, int r
)
3874 p
= restgpr1
<big_endian
>(p
, r
);
3875 write_insn
<big_endian
>(p
, blr
);
3879 template<bool big_endian
>
3880 static unsigned char*
3881 savefpr(unsigned char* p
, int r
)
3883 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3884 write_insn
<big_endian
>(p
, insn
);
3888 template<bool big_endian
>
3889 static unsigned char*
3890 savefpr0_tail(unsigned char* p
, int r
)
3892 p
= savefpr
<big_endian
>(p
, r
);
3893 write_insn
<big_endian
>(p
, std_0_1
+ 16);
3895 write_insn
<big_endian
>(p
, blr
);
3899 template<bool big_endian
>
3900 static unsigned char*
3901 restfpr(unsigned char* p
, int r
)
3903 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3904 write_insn
<big_endian
>(p
, insn
);
3908 template<bool big_endian
>
3909 static unsigned char*
3910 restfpr0_tail(unsigned char* p
, int r
)
3912 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
3914 p
= restfpr
<big_endian
>(p
, r
);
3915 write_insn
<big_endian
>(p
, mtlr_0
);
3919 p
= restfpr
<big_endian
>(p
, 30);
3920 p
= restfpr
<big_endian
>(p
, 31);
3922 write_insn
<big_endian
>(p
, blr
);
3926 template<bool big_endian
>
3927 static unsigned char*
3928 savefpr1_tail(unsigned char* p
, int r
)
3930 p
= savefpr
<big_endian
>(p
, r
);
3931 write_insn
<big_endian
>(p
, blr
);
3935 template<bool big_endian
>
3936 static unsigned char*
3937 restfpr1_tail(unsigned char* p
, int r
)
3939 p
= restfpr
<big_endian
>(p
, r
);
3940 write_insn
<big_endian
>(p
, blr
);
3944 template<bool big_endian
>
3945 static unsigned char*
3946 savevr(unsigned char* p
, int r
)
3948 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3949 write_insn
<big_endian
>(p
, insn
);
3951 insn
= stvx_0_12_0
+ (r
<< 21);
3952 write_insn
<big_endian
>(p
, insn
);
3956 template<bool big_endian
>
3957 static unsigned char*
3958 savevr_tail(unsigned char* p
, int r
)
3960 p
= savevr
<big_endian
>(p
, r
);
3961 write_insn
<big_endian
>(p
, blr
);
3965 template<bool big_endian
>
3966 static unsigned char*
3967 restvr(unsigned char* p
, int r
)
3969 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3970 write_insn
<big_endian
>(p
, insn
);
3972 insn
= lvx_0_12_0
+ (r
<< 21);
3973 write_insn
<big_endian
>(p
, insn
);
3977 template<bool big_endian
>
3978 static unsigned char*
3979 restvr_tail(unsigned char* p
, int r
)
3981 p
= restvr
<big_endian
>(p
, r
);
3982 write_insn
<big_endian
>(p
, blr
);
3987 template<int size
, bool big_endian
>
3988 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
3989 Symbol_table
* symtab
)
3990 : Output_section_data_build(4),
3993 this->savres_define(symtab
,
3994 "_savegpr0_", 14, 31,
3995 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
3996 this->savres_define(symtab
,
3997 "_restgpr0_", 14, 29,
3998 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3999 this->savres_define(symtab
,
4000 "_restgpr0_", 30, 31,
4001 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4002 this->savres_define(symtab
,
4003 "_savegpr1_", 14, 31,
4004 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
4005 this->savres_define(symtab
,
4006 "_restgpr1_", 14, 31,
4007 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
4008 this->savres_define(symtab
,
4009 "_savefpr_", 14, 31,
4010 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
4011 this->savres_define(symtab
,
4012 "_restfpr_", 14, 29,
4013 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4014 this->savres_define(symtab
,
4015 "_restfpr_", 30, 31,
4016 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4017 this->savres_define(symtab
,
4019 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
4020 this->savres_define(symtab
,
4022 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
4023 this->savres_define(symtab
,
4025 savevr
<big_endian
>, savevr_tail
<big_endian
>);
4026 this->savres_define(symtab
,
4028 restvr
<big_endian
>, restvr_tail
<big_endian
>);
4031 template<int size
, bool big_endian
>
4033 Output_data_save_res
<size
, big_endian
>::savres_define(
4034 Symbol_table
* symtab
,
4036 unsigned int lo
, unsigned int hi
,
4037 unsigned char* write_ent(unsigned char*, int),
4038 unsigned char* write_tail(unsigned char*, int))
4040 size_t len
= strlen(name
);
4041 bool writing
= false;
4044 memcpy(sym
, name
, len
);
4047 for (unsigned int i
= lo
; i
<= hi
; i
++)
4049 sym
[len
+ 0] = i
/ 10 + '0';
4050 sym
[len
+ 1] = i
% 10 + '0';
4051 Symbol
* gsym
= symtab
->lookup(sym
);
4052 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
4053 writing
= writing
|| refd
;
4056 if (this->contents_
== NULL
)
4057 this->contents_
= new unsigned char[this->savres_max
];
4059 section_size_type value
= this->current_data_size();
4060 unsigned char* p
= this->contents_
+ value
;
4062 p
= write_ent(p
, i
);
4064 p
= write_tail(p
, i
);
4065 section_size_type cur_size
= p
- this->contents_
;
4066 this->set_current_data_size(cur_size
);
4068 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
4069 this, value
, cur_size
- value
,
4070 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
4071 elfcpp::STV_HIDDEN
, 0, false, false);
4076 // Write out save/restore.
4078 template<int size
, bool big_endian
>
4080 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4082 const section_size_type off
= this->offset();
4083 const section_size_type oview_size
=
4084 convert_to_section_size_type(this->data_size());
4085 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4086 memcpy(oview
, this->contents_
, oview_size
);
4087 of
->write_output_view(off
, oview_size
, oview
);
4091 // Create the glink section.
4093 template<int size
, bool big_endian
>
4095 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4097 if (this->glink_
== NULL
)
4099 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4100 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4101 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4102 this->glink_
, ORDER_TEXT
, false);
4106 // Create a PLT entry for a global symbol.
4108 template<int size
, bool big_endian
>
4110 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4114 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4115 && gsym
->can_use_relative_reloc(false))
4117 if (this->iplt_
== NULL
)
4118 this->make_iplt_section(symtab
, layout
);
4119 this->iplt_
->add_ifunc_entry(gsym
);
4123 if (this->plt_
== NULL
)
4124 this->make_plt_section(symtab
, layout
);
4125 this->plt_
->add_entry(gsym
);
4129 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4131 template<int size
, bool big_endian
>
4133 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4134 Symbol_table
* symtab
,
4136 Sized_relobj_file
<size
, big_endian
>* relobj
,
4139 if (this->iplt_
== NULL
)
4140 this->make_iplt_section(symtab
, layout
);
4141 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4144 // Return the number of entries in the PLT.
4146 template<int size
, bool big_endian
>
4148 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4150 if (this->plt_
== NULL
)
4152 unsigned int count
= this->plt_
->entry_count();
4153 if (this->iplt_
!= NULL
)
4154 count
+= this->iplt_
->entry_count();
4158 // Return the offset of the first non-reserved PLT entry.
4160 template<int size
, bool big_endian
>
4162 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4164 return this->plt_
->first_plt_entry_offset();
4167 // Return the size of each PLT entry.
4169 template<int size
, bool big_endian
>
4171 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4173 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4176 // Create a GOT entry for local dynamic __tls_get_addr calls.
4178 template<int size
, bool big_endian
>
4180 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4181 Symbol_table
* symtab
,
4183 Sized_relobj_file
<size
, big_endian
>* object
)
4185 if (this->tlsld_got_offset_
== -1U)
4187 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4188 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4189 Output_data_got_powerpc
<size
, big_endian
>* got
4190 = this->got_section(symtab
, layout
);
4191 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4192 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4194 this->tlsld_got_offset_
= got_offset
;
4196 return this->tlsld_got_offset_
;
4199 // Get the Reference_flags for a particular relocation.
4201 template<int size
, bool big_endian
>
4203 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4207 case elfcpp::R_POWERPC_NONE
:
4208 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4209 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4210 case elfcpp::R_PPC64_TOC
:
4211 // No symbol reference.
4214 case elfcpp::R_PPC64_ADDR64
:
4215 case elfcpp::R_PPC64_UADDR64
:
4216 case elfcpp::R_POWERPC_ADDR32
:
4217 case elfcpp::R_POWERPC_UADDR32
:
4218 case elfcpp::R_POWERPC_ADDR16
:
4219 case elfcpp::R_POWERPC_UADDR16
:
4220 case elfcpp::R_POWERPC_ADDR16_LO
:
4221 case elfcpp::R_POWERPC_ADDR16_HI
:
4222 case elfcpp::R_POWERPC_ADDR16_HA
:
4223 return Symbol::ABSOLUTE_REF
;
4225 case elfcpp::R_POWERPC_ADDR24
:
4226 case elfcpp::R_POWERPC_ADDR14
:
4227 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4228 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4229 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4231 case elfcpp::R_PPC64_REL64
:
4232 case elfcpp::R_POWERPC_REL32
:
4233 case elfcpp::R_PPC_LOCAL24PC
:
4234 case elfcpp::R_POWERPC_REL16
:
4235 case elfcpp::R_POWERPC_REL16_LO
:
4236 case elfcpp::R_POWERPC_REL16_HI
:
4237 case elfcpp::R_POWERPC_REL16_HA
:
4238 return Symbol::RELATIVE_REF
;
4240 case elfcpp::R_POWERPC_REL24
:
4241 case elfcpp::R_PPC_PLTREL24
:
4242 case elfcpp::R_POWERPC_REL14
:
4243 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4244 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4245 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4247 case elfcpp::R_POWERPC_GOT16
:
4248 case elfcpp::R_POWERPC_GOT16_LO
:
4249 case elfcpp::R_POWERPC_GOT16_HI
:
4250 case elfcpp::R_POWERPC_GOT16_HA
:
4251 case elfcpp::R_PPC64_GOT16_DS
:
4252 case elfcpp::R_PPC64_GOT16_LO_DS
:
4253 case elfcpp::R_PPC64_TOC16
:
4254 case elfcpp::R_PPC64_TOC16_LO
:
4255 case elfcpp::R_PPC64_TOC16_HI
:
4256 case elfcpp::R_PPC64_TOC16_HA
:
4257 case elfcpp::R_PPC64_TOC16_DS
:
4258 case elfcpp::R_PPC64_TOC16_LO_DS
:
4260 return Symbol::ABSOLUTE_REF
;
4262 case elfcpp::R_POWERPC_GOT_TPREL16
:
4263 case elfcpp::R_POWERPC_TLS
:
4264 return Symbol::TLS_REF
;
4266 case elfcpp::R_POWERPC_COPY
:
4267 case elfcpp::R_POWERPC_GLOB_DAT
:
4268 case elfcpp::R_POWERPC_JMP_SLOT
:
4269 case elfcpp::R_POWERPC_RELATIVE
:
4270 case elfcpp::R_POWERPC_DTPMOD
:
4272 // Not expected. We will give an error later.
4277 // Report an unsupported relocation against a local symbol.
4279 template<int size
, bool big_endian
>
4281 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4282 Sized_relobj_file
<size
, big_endian
>* object
,
4283 unsigned int r_type
)
4285 gold_error(_("%s: unsupported reloc %u against local symbol"),
4286 object
->name().c_str(), r_type
);
4289 // We are about to emit a dynamic relocation of type R_TYPE. If the
4290 // dynamic linker does not support it, issue an error.
4292 template<int size
, bool big_endian
>
4294 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4295 unsigned int r_type
)
4297 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4299 // These are the relocation types supported by glibc for both 32-bit
4300 // and 64-bit powerpc.
4303 case elfcpp::R_POWERPC_NONE
:
4304 case elfcpp::R_POWERPC_RELATIVE
:
4305 case elfcpp::R_POWERPC_GLOB_DAT
:
4306 case elfcpp::R_POWERPC_DTPMOD
:
4307 case elfcpp::R_POWERPC_DTPREL
:
4308 case elfcpp::R_POWERPC_TPREL
:
4309 case elfcpp::R_POWERPC_JMP_SLOT
:
4310 case elfcpp::R_POWERPC_COPY
:
4311 case elfcpp::R_POWERPC_IRELATIVE
:
4312 case elfcpp::R_POWERPC_ADDR32
:
4313 case elfcpp::R_POWERPC_UADDR32
:
4314 case elfcpp::R_POWERPC_ADDR24
:
4315 case elfcpp::R_POWERPC_ADDR16
:
4316 case elfcpp::R_POWERPC_UADDR16
:
4317 case elfcpp::R_POWERPC_ADDR16_LO
:
4318 case elfcpp::R_POWERPC_ADDR16_HI
:
4319 case elfcpp::R_POWERPC_ADDR16_HA
:
4320 case elfcpp::R_POWERPC_ADDR14
:
4321 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4322 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4323 case elfcpp::R_POWERPC_REL32
:
4324 case elfcpp::R_POWERPC_REL24
:
4325 case elfcpp::R_POWERPC_TPREL16
:
4326 case elfcpp::R_POWERPC_TPREL16_LO
:
4327 case elfcpp::R_POWERPC_TPREL16_HI
:
4328 case elfcpp::R_POWERPC_TPREL16_HA
:
4339 // These are the relocation types supported only on 64-bit.
4340 case elfcpp::R_PPC64_ADDR64
:
4341 case elfcpp::R_PPC64_UADDR64
:
4342 case elfcpp::R_PPC64_JMP_IREL
:
4343 case elfcpp::R_PPC64_ADDR16_DS
:
4344 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4345 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4346 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4347 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4348 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4349 case elfcpp::R_PPC64_REL64
:
4350 case elfcpp::R_POWERPC_ADDR30
:
4351 case elfcpp::R_PPC64_TPREL16_DS
:
4352 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4353 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4354 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4355 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4356 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4367 // These are the relocation types supported only on 32-bit.
4368 // ??? glibc ld.so doesn't need to support these.
4369 case elfcpp::R_POWERPC_DTPREL16
:
4370 case elfcpp::R_POWERPC_DTPREL16_LO
:
4371 case elfcpp::R_POWERPC_DTPREL16_HI
:
4372 case elfcpp::R_POWERPC_DTPREL16_HA
:
4380 // This prevents us from issuing more than one error per reloc
4381 // section. But we can still wind up issuing more than one
4382 // error per object file.
4383 if (this->issued_non_pic_error_
)
4385 gold_assert(parameters
->options().output_is_position_independent());
4386 object
->error(_("requires unsupported dynamic reloc; "
4387 "recompile with -fPIC"));
4388 this->issued_non_pic_error_
= true;
4392 // Return whether we need to make a PLT entry for a relocation of the
4393 // given type against a STT_GNU_IFUNC symbol.
4395 template<int size
, bool big_endian
>
4397 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4398 Sized_relobj_file
<size
, big_endian
>* object
,
4399 unsigned int r_type
)
4401 // In non-pic code any reference will resolve to the plt call stub
4402 // for the ifunc symbol.
4403 if (size
== 32 && !parameters
->options().output_is_position_independent())
4408 // Word size refs from data sections are OK.
4409 case elfcpp::R_POWERPC_ADDR32
:
4410 case elfcpp::R_POWERPC_UADDR32
:
4415 case elfcpp::R_PPC64_ADDR64
:
4416 case elfcpp::R_PPC64_UADDR64
:
4421 // GOT refs are good.
4422 case elfcpp::R_POWERPC_GOT16
:
4423 case elfcpp::R_POWERPC_GOT16_LO
:
4424 case elfcpp::R_POWERPC_GOT16_HI
:
4425 case elfcpp::R_POWERPC_GOT16_HA
:
4426 case elfcpp::R_PPC64_GOT16_DS
:
4427 case elfcpp::R_PPC64_GOT16_LO_DS
:
4430 // So are function calls.
4431 case elfcpp::R_POWERPC_ADDR24
:
4432 case elfcpp::R_POWERPC_ADDR14
:
4433 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4434 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4435 case elfcpp::R_POWERPC_REL24
:
4436 case elfcpp::R_PPC_PLTREL24
:
4437 case elfcpp::R_POWERPC_REL14
:
4438 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4439 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4446 // Anything else is a problem.
4447 // If we are building a static executable, the libc startup function
4448 // responsible for applying indirect function relocations is going
4449 // to complain about the reloc type.
4450 // If we are building a dynamic executable, we will have a text
4451 // relocation. The dynamic loader will set the text segment
4452 // writable and non-executable to apply text relocations. So we'll
4453 // segfault when trying to run the indirection function to resolve
4455 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4456 object
->name().c_str(), r_type
);
4460 // Scan a relocation for a local symbol.
4462 template<int size
, bool big_endian
>
4464 Target_powerpc
<size
, big_endian
>::Scan::local(
4465 Symbol_table
* symtab
,
4467 Target_powerpc
<size
, big_endian
>* target
,
4468 Sized_relobj_file
<size
, big_endian
>* object
,
4469 unsigned int data_shndx
,
4470 Output_section
* output_section
,
4471 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4472 unsigned int r_type
,
4473 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4476 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
4478 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4479 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4481 this->expect_tls_get_addr_call();
4482 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4483 if (tls_type
!= tls::TLSOPT_NONE
)
4484 this->skip_next_tls_get_addr_call();
4486 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4487 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4489 this->expect_tls_get_addr_call();
4490 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4491 if (tls_type
!= tls::TLSOPT_NONE
)
4492 this->skip_next_tls_get_addr_call();
4495 Powerpc_relobj
<size
, big_endian
>* ppc_object
4496 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4501 && data_shndx
== ppc_object
->opd_shndx()
4502 && r_type
== elfcpp::R_PPC64_ADDR64
)
4503 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4507 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4508 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4509 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
4511 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4512 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4513 r_type
, r_sym
, reloc
.get_r_addend());
4514 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
4519 case elfcpp::R_POWERPC_NONE
:
4520 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4521 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4522 case elfcpp::R_PPC64_TOCSAVE
:
4523 case elfcpp::R_PPC_EMB_MRKREF
:
4524 case elfcpp::R_POWERPC_TLS
:
4527 case elfcpp::R_PPC64_TOC
:
4529 Output_data_got_powerpc
<size
, big_endian
>* got
4530 = target
->got_section(symtab
, layout
);
4531 if (parameters
->options().output_is_position_independent())
4533 Address off
= reloc
.get_r_offset();
4535 && data_shndx
== ppc_object
->opd_shndx()
4536 && ppc_object
->get_opd_discard(off
- 8))
4539 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4540 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4541 rela_dyn
->add_output_section_relative(got
->output_section(),
4542 elfcpp::R_POWERPC_RELATIVE
,
4544 object
, data_shndx
, off
,
4545 symobj
->toc_base_offset());
4550 case elfcpp::R_PPC64_ADDR64
:
4551 case elfcpp::R_PPC64_UADDR64
:
4552 case elfcpp::R_POWERPC_ADDR32
:
4553 case elfcpp::R_POWERPC_UADDR32
:
4554 case elfcpp::R_POWERPC_ADDR24
:
4555 case elfcpp::R_POWERPC_ADDR16
:
4556 case elfcpp::R_POWERPC_ADDR16_LO
:
4557 case elfcpp::R_POWERPC_ADDR16_HI
:
4558 case elfcpp::R_POWERPC_ADDR16_HA
:
4559 case elfcpp::R_POWERPC_UADDR16
:
4560 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4561 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4562 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4563 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4564 case elfcpp::R_PPC64_ADDR16_DS
:
4565 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4566 case elfcpp::R_POWERPC_ADDR14
:
4567 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4568 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4569 // If building a shared library (or a position-independent
4570 // executable), we need to create a dynamic relocation for
4572 if (parameters
->options().output_is_position_independent()
4573 || (size
== 64 && is_ifunc
))
4575 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4577 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
4578 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
4580 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4581 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4584 rela_dyn
= target
->iplt_section()->rel_plt();
4585 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4587 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4588 output_section
, data_shndx
,
4589 reloc
.get_r_offset(),
4590 reloc
.get_r_addend(), false);
4594 check_non_pic(object
, r_type
);
4595 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4596 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
4597 data_shndx
, reloc
.get_r_offset(),
4598 reloc
.get_r_addend());
4603 case elfcpp::R_POWERPC_REL24
:
4604 case elfcpp::R_PPC_PLTREL24
:
4605 case elfcpp::R_PPC_LOCAL24PC
:
4606 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4607 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4608 reloc
.get_r_addend());
4611 case elfcpp::R_POWERPC_REL14
:
4612 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4613 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4614 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4615 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4616 reloc
.get_r_addend());
4619 case elfcpp::R_PPC64_REL64
:
4620 case elfcpp::R_POWERPC_REL32
:
4621 case elfcpp::R_POWERPC_REL16
:
4622 case elfcpp::R_POWERPC_REL16_LO
:
4623 case elfcpp::R_POWERPC_REL16_HI
:
4624 case elfcpp::R_POWERPC_REL16_HA
:
4625 case elfcpp::R_POWERPC_SECTOFF
:
4626 case elfcpp::R_POWERPC_TPREL16
:
4627 case elfcpp::R_POWERPC_DTPREL16
:
4628 case elfcpp::R_POWERPC_SECTOFF_LO
:
4629 case elfcpp::R_POWERPC_TPREL16_LO
:
4630 case elfcpp::R_POWERPC_DTPREL16_LO
:
4631 case elfcpp::R_POWERPC_SECTOFF_HI
:
4632 case elfcpp::R_POWERPC_TPREL16_HI
:
4633 case elfcpp::R_POWERPC_DTPREL16_HI
:
4634 case elfcpp::R_POWERPC_SECTOFF_HA
:
4635 case elfcpp::R_POWERPC_TPREL16_HA
:
4636 case elfcpp::R_POWERPC_DTPREL16_HA
:
4637 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4638 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4639 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4640 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4641 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4642 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4643 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4644 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4645 case elfcpp::R_PPC64_TPREL16_DS
:
4646 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4647 case elfcpp::R_PPC64_DTPREL16_DS
:
4648 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4649 case elfcpp::R_PPC64_SECTOFF_DS
:
4650 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4651 case elfcpp::R_PPC64_TLSGD
:
4652 case elfcpp::R_PPC64_TLSLD
:
4655 case elfcpp::R_POWERPC_GOT16
:
4656 case elfcpp::R_POWERPC_GOT16_LO
:
4657 case elfcpp::R_POWERPC_GOT16_HI
:
4658 case elfcpp::R_POWERPC_GOT16_HA
:
4659 case elfcpp::R_PPC64_GOT16_DS
:
4660 case elfcpp::R_PPC64_GOT16_LO_DS
:
4662 // The symbol requires a GOT entry.
4663 Output_data_got_powerpc
<size
, big_endian
>* got
4664 = target
->got_section(symtab
, layout
);
4665 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4667 if (!parameters
->options().output_is_position_independent())
4669 if (size
== 32 && is_ifunc
)
4670 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
4672 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
4674 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
4676 // If we are generating a shared object or a pie, this
4677 // symbol's GOT entry will be set by a dynamic relocation.
4679 off
= got
->add_constant(0);
4680 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
4682 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4683 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4686 rela_dyn
= target
->iplt_section()->rel_plt();
4687 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4689 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4690 got
, off
, 0, false);
4695 case elfcpp::R_PPC64_TOC16
:
4696 case elfcpp::R_PPC64_TOC16_LO
:
4697 case elfcpp::R_PPC64_TOC16_HI
:
4698 case elfcpp::R_PPC64_TOC16_HA
:
4699 case elfcpp::R_PPC64_TOC16_DS
:
4700 case elfcpp::R_PPC64_TOC16_LO_DS
:
4701 // We need a GOT section.
4702 target
->got_section(symtab
, layout
);
4705 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4706 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4707 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4708 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4710 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4711 if (tls_type
== tls::TLSOPT_NONE
)
4713 Output_data_got_powerpc
<size
, big_endian
>* got
4714 = target
->got_section(symtab
, layout
);
4715 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4716 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4717 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
4718 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
4720 else if (tls_type
== tls::TLSOPT_TO_LE
)
4722 // no GOT relocs needed for Local Exec.
4729 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4730 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4731 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4732 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4734 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4735 if (tls_type
== tls::TLSOPT_NONE
)
4736 target
->tlsld_got_offset(symtab
, layout
, object
);
4737 else if (tls_type
== tls::TLSOPT_TO_LE
)
4739 // no GOT relocs needed for Local Exec.
4740 if (parameters
->options().emit_relocs())
4742 Output_section
* os
= layout
->tls_segment()->first_section();
4743 gold_assert(os
!= NULL
);
4744 os
->set_needs_symtab_index();
4752 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4753 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4754 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4755 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4757 Output_data_got_powerpc
<size
, big_endian
>* got
4758 = target
->got_section(symtab
, layout
);
4759 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4760 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
4764 case elfcpp::R_POWERPC_GOT_TPREL16
:
4765 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4766 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4767 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4769 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
4770 if (tls_type
== tls::TLSOPT_NONE
)
4772 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4773 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
4775 Output_data_got_powerpc
<size
, big_endian
>* got
4776 = target
->got_section(symtab
, layout
);
4777 unsigned int off
= got
->add_constant(0);
4778 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
4780 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4781 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
4782 elfcpp::R_POWERPC_TPREL
,
4786 else if (tls_type
== tls::TLSOPT_TO_LE
)
4788 // no GOT relocs needed for Local Exec.
4796 unsupported_reloc_local(object
, r_type
);
4802 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4803 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4804 case elfcpp::R_POWERPC_GOT_TPREL16
:
4805 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4806 case elfcpp::R_POWERPC_GOT16
:
4807 case elfcpp::R_PPC64_GOT16_DS
:
4808 case elfcpp::R_PPC64_TOC16
:
4809 case elfcpp::R_PPC64_TOC16_DS
:
4810 ppc_object
->set_has_small_toc_reloc();
4816 // Report an unsupported relocation against a global symbol.
4818 template<int size
, bool big_endian
>
4820 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
4821 Sized_relobj_file
<size
, big_endian
>* object
,
4822 unsigned int r_type
,
4825 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4826 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
4829 // Scan a relocation for a global symbol.
4831 template<int size
, bool big_endian
>
4833 Target_powerpc
<size
, big_endian
>::Scan::global(
4834 Symbol_table
* symtab
,
4836 Target_powerpc
<size
, big_endian
>* target
,
4837 Sized_relobj_file
<size
, big_endian
>* object
,
4838 unsigned int data_shndx
,
4839 Output_section
* output_section
,
4840 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4841 unsigned int r_type
,
4844 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
4847 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4848 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4850 this->expect_tls_get_addr_call();
4851 const bool final
= gsym
->final_value_is_known();
4852 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4853 if (tls_type
!= tls::TLSOPT_NONE
)
4854 this->skip_next_tls_get_addr_call();
4856 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4857 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4859 this->expect_tls_get_addr_call();
4860 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4861 if (tls_type
!= tls::TLSOPT_NONE
)
4862 this->skip_next_tls_get_addr_call();
4865 Powerpc_relobj
<size
, big_endian
>* ppc_object
4866 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4868 // A STT_GNU_IFUNC symbol may require a PLT entry.
4869 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4870 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
4872 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4873 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4874 reloc
.get_r_addend());
4875 target
->make_plt_entry(symtab
, layout
, gsym
);
4880 case elfcpp::R_POWERPC_NONE
:
4881 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4882 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4883 case elfcpp::R_PPC_LOCAL24PC
:
4884 case elfcpp::R_PPC_EMB_MRKREF
:
4885 case elfcpp::R_POWERPC_TLS
:
4888 case elfcpp::R_PPC64_TOC
:
4890 Output_data_got_powerpc
<size
, big_endian
>* got
4891 = target
->got_section(symtab
, layout
);
4892 if (parameters
->options().output_is_position_independent())
4894 Address off
= reloc
.get_r_offset();
4896 && data_shndx
== ppc_object
->opd_shndx()
4897 && ppc_object
->get_opd_discard(off
- 8))
4900 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4901 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4902 if (data_shndx
!= ppc_object
->opd_shndx())
4903 symobj
= static_cast
4904 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4905 rela_dyn
->add_output_section_relative(got
->output_section(),
4906 elfcpp::R_POWERPC_RELATIVE
,
4908 object
, data_shndx
, off
,
4909 symobj
->toc_base_offset());
4914 case elfcpp::R_PPC64_ADDR64
:
4916 && data_shndx
== ppc_object
->opd_shndx()
4917 && (gsym
->is_defined_in_discarded_section()
4918 || gsym
->object() != object
))
4920 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4924 case elfcpp::R_PPC64_UADDR64
:
4925 case elfcpp::R_POWERPC_ADDR32
:
4926 case elfcpp::R_POWERPC_UADDR32
:
4927 case elfcpp::R_POWERPC_ADDR24
:
4928 case elfcpp::R_POWERPC_ADDR16
:
4929 case elfcpp::R_POWERPC_ADDR16_LO
:
4930 case elfcpp::R_POWERPC_ADDR16_HI
:
4931 case elfcpp::R_POWERPC_ADDR16_HA
:
4932 case elfcpp::R_POWERPC_UADDR16
:
4933 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4934 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4935 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4936 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4937 case elfcpp::R_PPC64_ADDR16_DS
:
4938 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4939 case elfcpp::R_POWERPC_ADDR14
:
4940 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4941 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4943 // Make a PLT entry if necessary.
4944 if (gsym
->needs_plt_entry())
4946 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4948 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4949 reloc
.get_r_addend());
4950 target
->make_plt_entry(symtab
, layout
, gsym
);
4951 // Since this is not a PC-relative relocation, we may be
4952 // taking the address of a function. In that case we need to
4953 // set the entry in the dynamic symbol table to the address of
4954 // the PLT call stub.
4956 && gsym
->is_from_dynobj()
4957 && !parameters
->options().output_is_position_independent())
4958 gsym
->set_needs_dynsym_value();
4960 // Make a dynamic relocation if necessary.
4961 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4962 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
4964 if (gsym
->may_need_copy_reloc())
4966 target
->copy_reloc(symtab
, layout
, object
,
4967 data_shndx
, output_section
, gsym
, reloc
);
4969 else if ((size
== 32
4970 && r_type
== elfcpp::R_POWERPC_ADDR32
4971 && gsym
->can_use_relative_reloc(false)
4972 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
4973 && parameters
->options().shared()))
4975 && r_type
== elfcpp::R_PPC64_ADDR64
4976 && (gsym
->can_use_relative_reloc(false)
4977 || data_shndx
== ppc_object
->opd_shndx())))
4979 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4980 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4981 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4983 rela_dyn
= target
->iplt_section()->rel_plt();
4984 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4986 rela_dyn
->add_symbolless_global_addend(
4987 gsym
, dynrel
, output_section
, object
, data_shndx
,
4988 reloc
.get_r_offset(), reloc
.get_r_addend());
4992 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4993 check_non_pic(object
, r_type
);
4994 rela_dyn
->add_global(gsym
, r_type
, output_section
,
4996 reloc
.get_r_offset(),
4997 reloc
.get_r_addend());
5003 case elfcpp::R_PPC_PLTREL24
:
5004 case elfcpp::R_POWERPC_REL24
:
5005 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5006 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5007 reloc
.get_r_addend());
5008 if (gsym
->needs_plt_entry()
5009 || (!gsym
->final_value_is_known()
5010 && (gsym
->is_undefined()
5011 || gsym
->is_from_dynobj()
5012 || gsym
->is_preemptible())))
5013 target
->make_plt_entry(symtab
, layout
, gsym
);
5016 case elfcpp::R_PPC64_REL64
:
5017 case elfcpp::R_POWERPC_REL32
:
5018 // Make a dynamic relocation if necessary.
5019 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
5021 if (gsym
->may_need_copy_reloc())
5023 target
->copy_reloc(symtab
, layout
, object
,
5024 data_shndx
, output_section
, gsym
,
5029 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5030 check_non_pic(object
, r_type
);
5031 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
5032 data_shndx
, reloc
.get_r_offset(),
5033 reloc
.get_r_addend());
5038 case elfcpp::R_POWERPC_REL14
:
5039 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5040 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5041 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5042 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5043 reloc
.get_r_addend());
5046 case elfcpp::R_POWERPC_REL16
:
5047 case elfcpp::R_POWERPC_REL16_LO
:
5048 case elfcpp::R_POWERPC_REL16_HI
:
5049 case elfcpp::R_POWERPC_REL16_HA
:
5050 case elfcpp::R_POWERPC_SECTOFF
:
5051 case elfcpp::R_POWERPC_TPREL16
:
5052 case elfcpp::R_POWERPC_DTPREL16
:
5053 case elfcpp::R_POWERPC_SECTOFF_LO
:
5054 case elfcpp::R_POWERPC_TPREL16_LO
:
5055 case elfcpp::R_POWERPC_DTPREL16_LO
:
5056 case elfcpp::R_POWERPC_SECTOFF_HI
:
5057 case elfcpp::R_POWERPC_TPREL16_HI
:
5058 case elfcpp::R_POWERPC_DTPREL16_HI
:
5059 case elfcpp::R_POWERPC_SECTOFF_HA
:
5060 case elfcpp::R_POWERPC_TPREL16_HA
:
5061 case elfcpp::R_POWERPC_DTPREL16_HA
:
5062 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5063 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5064 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5065 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5066 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5067 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5068 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5069 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5070 case elfcpp::R_PPC64_TPREL16_DS
:
5071 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5072 case elfcpp::R_PPC64_DTPREL16_DS
:
5073 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5074 case elfcpp::R_PPC64_SECTOFF_DS
:
5075 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5076 case elfcpp::R_PPC64_TLSGD
:
5077 case elfcpp::R_PPC64_TLSLD
:
5080 case elfcpp::R_POWERPC_GOT16
:
5081 case elfcpp::R_POWERPC_GOT16_LO
:
5082 case elfcpp::R_POWERPC_GOT16_HI
:
5083 case elfcpp::R_POWERPC_GOT16_HA
:
5084 case elfcpp::R_PPC64_GOT16_DS
:
5085 case elfcpp::R_PPC64_GOT16_LO_DS
:
5087 // The symbol requires a GOT entry.
5088 Output_data_got_powerpc
<size
, big_endian
>* got
;
5090 got
= target
->got_section(symtab
, layout
);
5091 if (gsym
->final_value_is_known())
5093 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
5094 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
5096 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
5098 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
5100 // If we are generating a shared object or a pie, this
5101 // symbol's GOT entry will be set by a dynamic relocation.
5102 unsigned int off
= got
->add_constant(0);
5103 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
5105 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5106 if (gsym
->can_use_relative_reloc(false)
5108 && gsym
->visibility() == elfcpp::STV_PROTECTED
5109 && parameters
->options().shared()))
5111 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
5112 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
5114 rela_dyn
= target
->iplt_section()->rel_plt();
5115 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
5117 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5121 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5122 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5128 case elfcpp::R_PPC64_TOC16
:
5129 case elfcpp::R_PPC64_TOC16_LO
:
5130 case elfcpp::R_PPC64_TOC16_HI
:
5131 case elfcpp::R_PPC64_TOC16_HA
:
5132 case elfcpp::R_PPC64_TOC16_DS
:
5133 case elfcpp::R_PPC64_TOC16_LO_DS
:
5134 // We need a GOT section.
5135 target
->got_section(symtab
, layout
);
5138 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5139 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5140 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5141 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5143 const bool final
= gsym
->final_value_is_known();
5144 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5145 if (tls_type
== tls::TLSOPT_NONE
)
5147 Output_data_got_powerpc
<size
, big_endian
>* got
5148 = target
->got_section(symtab
, layout
);
5149 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
5150 target
->rela_dyn_section(layout
),
5151 elfcpp::R_POWERPC_DTPMOD
,
5152 elfcpp::R_POWERPC_DTPREL
);
5154 else if (tls_type
== tls::TLSOPT_TO_IE
)
5156 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5158 Output_data_got_powerpc
<size
, big_endian
>* got
5159 = target
->got_section(symtab
, layout
);
5160 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5161 if (gsym
->is_undefined()
5162 || gsym
->is_from_dynobj())
5164 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5165 elfcpp::R_POWERPC_TPREL
);
5169 unsigned int off
= got
->add_constant(0);
5170 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5171 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5172 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5177 else if (tls_type
== tls::TLSOPT_TO_LE
)
5179 // no GOT relocs needed for Local Exec.
5186 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5187 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5188 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5189 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5191 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5192 if (tls_type
== tls::TLSOPT_NONE
)
5193 target
->tlsld_got_offset(symtab
, layout
, object
);
5194 else if (tls_type
== tls::TLSOPT_TO_LE
)
5196 // no GOT relocs needed for Local Exec.
5197 if (parameters
->options().emit_relocs())
5199 Output_section
* os
= layout
->tls_segment()->first_section();
5200 gold_assert(os
!= NULL
);
5201 os
->set_needs_symtab_index();
5209 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5210 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5211 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5212 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5214 Output_data_got_powerpc
<size
, big_endian
>* got
5215 = target
->got_section(symtab
, layout
);
5216 if (!gsym
->final_value_is_known()
5217 && (gsym
->is_from_dynobj()
5218 || gsym
->is_undefined()
5219 || gsym
->is_preemptible()))
5220 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5221 target
->rela_dyn_section(layout
),
5222 elfcpp::R_POWERPC_DTPREL
);
5224 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5228 case elfcpp::R_POWERPC_GOT_TPREL16
:
5229 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5230 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5231 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5233 const bool final
= gsym
->final_value_is_known();
5234 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5235 if (tls_type
== tls::TLSOPT_NONE
)
5237 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5239 Output_data_got_powerpc
<size
, big_endian
>* got
5240 = target
->got_section(symtab
, layout
);
5241 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5242 if (gsym
->is_undefined()
5243 || gsym
->is_from_dynobj())
5245 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5246 elfcpp::R_POWERPC_TPREL
);
5250 unsigned int off
= got
->add_constant(0);
5251 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5252 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5253 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5258 else if (tls_type
== tls::TLSOPT_TO_LE
)
5260 // no GOT relocs needed for Local Exec.
5268 unsupported_reloc_global(object
, r_type
, gsym
);
5274 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5275 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5276 case elfcpp::R_POWERPC_GOT_TPREL16
:
5277 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5278 case elfcpp::R_POWERPC_GOT16
:
5279 case elfcpp::R_PPC64_GOT16_DS
:
5280 case elfcpp::R_PPC64_TOC16
:
5281 case elfcpp::R_PPC64_TOC16_DS
:
5282 ppc_object
->set_has_small_toc_reloc();
5288 // Process relocations for gc.
5290 template<int size
, bool big_endian
>
5292 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5293 Symbol_table
* symtab
,
5295 Sized_relobj_file
<size
, big_endian
>* object
,
5296 unsigned int data_shndx
,
5298 const unsigned char* prelocs
,
5300 Output_section
* output_section
,
5301 bool needs_special_offset_handling
,
5302 size_t local_symbol_count
,
5303 const unsigned char* plocal_symbols
)
5305 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5306 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5307 Powerpc_relobj
<size
, big_endian
>* ppc_object
5308 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5310 ppc_object
->set_opd_valid();
5311 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5313 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5314 for (p
= ppc_object
->access_from_map()->begin();
5315 p
!= ppc_object
->access_from_map()->end();
5318 Address dst_off
= p
->first
;
5319 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5320 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5321 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5323 Object
* src_obj
= s
->first
;
5324 unsigned int src_indx
= s
->second
;
5325 symtab
->gc()->add_reference(src_obj
, src_indx
,
5326 ppc_object
, dst_indx
);
5330 ppc_object
->access_from_map()->clear();
5331 ppc_object
->process_gc_mark(symtab
);
5332 // Don't look at .opd relocs as .opd will reference everything.
5336 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5337 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5346 needs_special_offset_handling
,
5351 // Handle target specific gc actions when adding a gc reference from
5352 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5353 // and DST_OFF. For powerpc64, this adds a referenc to the code
5354 // section of a function descriptor.
5356 template<int size
, bool big_endian
>
5358 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5359 Symbol_table
* symtab
,
5361 unsigned int src_shndx
,
5363 unsigned int dst_shndx
,
5364 Address dst_off
) const
5366 Powerpc_relobj
<size
, big_endian
>* ppc_object
5367 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5369 && !ppc_object
->is_dynamic()
5370 && dst_shndx
== ppc_object
->opd_shndx())
5372 if (ppc_object
->opd_valid())
5374 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5375 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5379 // If we haven't run scan_opd_relocs, we must delay
5380 // processing this function descriptor reference.
5381 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5386 // Add any special sections for this symbol to the gc work list.
5387 // For powerpc64, this adds the code section of a function
5390 template<int size
, bool big_endian
>
5392 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5393 Symbol_table
* symtab
,
5398 Powerpc_relobj
<size
, big_endian
>* ppc_object
5399 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5401 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5402 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
5404 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5405 Address dst_off
= gsym
->value();
5406 if (ppc_object
->opd_valid())
5408 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5409 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5412 ppc_object
->add_gc_mark(dst_off
);
5417 // Scan relocations for a section.
5419 template<int size
, bool big_endian
>
5421 Target_powerpc
<size
, big_endian
>::scan_relocs(
5422 Symbol_table
* symtab
,
5424 Sized_relobj_file
<size
, big_endian
>* object
,
5425 unsigned int data_shndx
,
5426 unsigned int sh_type
,
5427 const unsigned char* prelocs
,
5429 Output_section
* output_section
,
5430 bool needs_special_offset_handling
,
5431 size_t local_symbol_count
,
5432 const unsigned char* plocal_symbols
)
5434 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5435 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5437 if (sh_type
== elfcpp::SHT_REL
)
5439 gold_error(_("%s: unsupported REL reloc section"),
5440 object
->name().c_str());
5444 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5453 needs_special_offset_handling
,
5458 // Functor class for processing the global symbol table.
5459 // Removes symbols defined on discarded opd entries.
5461 template<bool big_endian
>
5462 class Global_symbol_visitor_opd
5465 Global_symbol_visitor_opd()
5469 operator()(Sized_symbol
<64>* sym
)
5471 if (sym
->has_symtab_index()
5472 || sym
->source() != Symbol::FROM_OBJECT
5473 || !sym
->in_real_elf())
5476 Powerpc_relobj
<64, big_endian
>* symobj
5477 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5478 if (symobj
->is_dynamic()
5479 || symobj
->opd_shndx() == 0)
5483 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5484 if (shndx
== symobj
->opd_shndx()
5485 && symobj
->get_opd_discard(sym
->value()))
5486 sym
->set_symtab_index(-1U);
5490 template<int size
, bool big_endian
>
5492 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
5494 Symbol_table
* symtab
)
5498 Output_data_save_res
<64, big_endian
>* savres
5499 = new Output_data_save_res
<64, big_endian
>(symtab
);
5500 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5501 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5502 savres
, ORDER_TEXT
, false);
5506 // Sort linker created .got section first (for the header), then input
5507 // sections belonging to files using small model code.
5509 template<bool big_endian
>
5510 class Sort_toc_sections
5514 operator()(const Output_section::Input_section
& is1
,
5515 const Output_section::Input_section
& is2
) const
5517 if (!is1
.is_input_section() && is2
.is_input_section())
5520 = (is1
.is_input_section()
5521 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
5522 ->has_small_toc_reloc()));
5524 = (is2
.is_input_section()
5525 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
5526 ->has_small_toc_reloc()));
5527 return small1
&& !small2
;
5531 // Finalize the sections.
5533 template<int size
, bool big_endian
>
5535 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
5537 const Input_objects
*,
5538 Symbol_table
* symtab
)
5540 if (parameters
->doing_static_link())
5542 // At least some versions of glibc elf-init.o have a strong
5543 // reference to __rela_iplt marker syms. A weak ref would be
5545 if (this->iplt_
!= NULL
)
5547 Reloc_section
* rel
= this->iplt_
->rel_plt();
5548 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
5549 Symbol_table::PREDEFINED
, rel
, 0, 0,
5550 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5551 elfcpp::STV_HIDDEN
, 0, false, true);
5552 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
5553 Symbol_table::PREDEFINED
, rel
, 0, 0,
5554 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5555 elfcpp::STV_HIDDEN
, 0, true, true);
5559 symtab
->define_as_constant("__rela_iplt_start", NULL
,
5560 Symbol_table::PREDEFINED
, 0, 0,
5561 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5562 elfcpp::STV_HIDDEN
, 0, true, false);
5563 symtab
->define_as_constant("__rela_iplt_end", NULL
,
5564 Symbol_table::PREDEFINED
, 0, 0,
5565 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5566 elfcpp::STV_HIDDEN
, 0, true, false);
5572 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
5573 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
5575 if (!parameters
->options().relocatable())
5577 this->define_save_restore_funcs(layout
, symtab
);
5579 // Annoyingly, we need to make these sections now whether or
5580 // not we need them. If we delay until do_relax then we
5581 // need to mess with the relaxation machinery checkpointing.
5582 this->got_section(symtab
, layout
);
5583 this->make_brlt_section(layout
);
5585 if (parameters
->options().toc_sort())
5587 Output_section
* os
= this->got_
->output_section();
5588 if (os
!= NULL
&& os
->input_sections().size() > 1)
5589 std::stable_sort(os
->input_sections().begin(),
5590 os
->input_sections().end(),
5591 Sort_toc_sections
<big_endian
>());
5596 // Fill in some more dynamic tags.
5597 Output_data_dynamic
* odyn
= layout
->dynamic_data();
5600 const Reloc_section
* rel_plt
= (this->plt_
== NULL
5602 : this->plt_
->rel_plt());
5603 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
5604 this->rela_dyn_
, true, size
== 32);
5608 if (this->got_
!= NULL
)
5610 this->got_
->finalize_data_size();
5611 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
5612 this->got_
, this->got_
->g_o_t());
5617 if (this->glink_
!= NULL
)
5619 this->glink_
->finalize_data_size();
5620 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
5622 (this->glink_
->pltresolve_size
5628 // Emit any relocs we saved in an attempt to avoid generating COPY
5630 if (this->copy_relocs_
.any_saved_relocs())
5631 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
5634 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5638 ok_lo_toc_insn(uint32_t insn
)
5640 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
5641 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5642 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5643 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5644 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5645 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5646 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5647 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5648 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5649 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5650 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5651 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5652 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5653 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5654 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5656 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
5657 && ((insn
& 3) == 0 || (insn
& 3) == 3))
5658 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
5661 // Return the value to use for a branch relocation.
5663 template<int size
, bool big_endian
>
5664 typename
elfcpp::Elf_types
<size
>::Elf_Addr
5665 Target_powerpc
<size
, big_endian
>::symval_for_branch(
5667 const Sized_symbol
<size
>* gsym
,
5668 Powerpc_relobj
<size
, big_endian
>* object
,
5669 unsigned int *dest_shndx
)
5675 // If the symbol is defined in an opd section, ie. is a function
5676 // descriptor, use the function descriptor code entry address
5677 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
5679 && gsym
->source() != Symbol::FROM_OBJECT
)
5682 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5683 unsigned int shndx
= symobj
->opd_shndx();
5686 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
5687 gold_assert(opd_addr
!= invalid_address
);
5688 opd_addr
+= symobj
->output_section(shndx
)->address();
5689 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
5692 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
5693 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
5694 gold_assert(sec_addr
!= invalid_address
);
5695 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
5696 value
= sec_addr
+ sec_off
;
5701 // Perform a relocation.
5703 template<int size
, bool big_endian
>
5705 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
5706 const Relocate_info
<size
, big_endian
>* relinfo
,
5707 Target_powerpc
* target
,
5710 const elfcpp::Rela
<size
, big_endian
>& rela
,
5711 unsigned int r_type
,
5712 const Sized_symbol
<size
>* gsym
,
5713 const Symbol_value
<size
>* psymval
,
5714 unsigned char* view
,
5716 section_size_type view_size
)
5718 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
5720 case Track_tls::NOT_EXPECTED
:
5721 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5722 _("__tls_get_addr call lacks marker reloc"));
5724 case Track_tls::EXPECTED
:
5725 // We have already complained.
5727 case Track_tls::SKIP
:
5729 case Track_tls::NORMAL
:
5733 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
5734 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
5735 Powerpc_relobj
<size
, big_endian
>* const object
5736 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5738 bool has_plt_value
= false;
5739 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5741 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5742 : object
->local_has_plt_offset(r_sym
))
5744 Stub_table
<size
, big_endian
>* stub_table
5745 = object
->stub_table(relinfo
->data_shndx
);
5746 if (stub_table
== NULL
)
5748 // This is a ref from a data section to an ifunc symbol.
5749 if (target
->stub_tables().size() != 0)
5750 stub_table
= target
->stub_tables()[0];
5752 gold_assert(stub_table
!= NULL
);
5755 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
5756 rela
.get_r_addend());
5758 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
5759 rela
.get_r_addend());
5760 gold_assert(off
!= invalid_address
);
5761 value
= stub_table
->stub_address() + off
;
5762 has_plt_value
= true;
5765 if (r_type
== elfcpp::R_POWERPC_GOT16
5766 || r_type
== elfcpp::R_POWERPC_GOT16_LO
5767 || r_type
== elfcpp::R_POWERPC_GOT16_HI
5768 || r_type
== elfcpp::R_POWERPC_GOT16_HA
5769 || r_type
== elfcpp::R_PPC64_GOT16_DS
5770 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
5774 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
5775 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
5779 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5780 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
5781 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
5783 value
-= target
->got_section()->got_base_offset(object
);
5785 else if (r_type
== elfcpp::R_PPC64_TOC
)
5787 value
= (target
->got_section()->output_section()->address()
5788 + object
->toc_base_offset());
5790 else if (gsym
!= NULL
5791 && (r_type
== elfcpp::R_POWERPC_REL24
5792 || r_type
== elfcpp::R_PPC_PLTREL24
)
5797 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
5798 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
5799 bool can_plt_call
= false;
5800 if (rela
.get_r_offset() + 8 <= view_size
)
5802 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5803 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
5806 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
5808 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
5809 can_plt_call
= true;
5814 // If we don't have a branch and link followed by a nop,
5815 // we can't go via the plt because there is no place to
5816 // put a toc restoring instruction.
5817 // Unless we know we won't be returning.
5818 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
5819 can_plt_call
= true;
5823 // This is not an error in one special case: A self
5824 // call. It isn't possible to cheaply verify we have
5825 // such a call so just check for a call to the same
5828 Address code
= value
;
5829 if (gsym
->source() == Symbol::FROM_OBJECT
5830 && gsym
->object() == object
)
5832 Address addend
= rela
.get_r_addend();
5833 unsigned int dest_shndx
;
5834 Address opdent
= psymval
->value(object
, addend
);
5835 code
= target
->symval_for_branch(opdent
, gsym
, object
,
5838 if (dest_shndx
== 0)
5839 dest_shndx
= gsym
->shndx(&is_ordinary
);
5840 ok
= dest_shndx
== relinfo
->data_shndx
;
5844 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5845 _("call lacks nop, can't restore toc; "
5846 "recompile with -fPIC"));
5852 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5853 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5854 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5855 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5857 // First instruction of a global dynamic sequence, arg setup insn.
5858 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5859 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5860 enum Got_type got_type
= GOT_TYPE_STANDARD
;
5861 if (tls_type
== tls::TLSOPT_NONE
)
5862 got_type
= GOT_TYPE_TLSGD
;
5863 else if (tls_type
== tls::TLSOPT_TO_IE
)
5864 got_type
= GOT_TYPE_TPREL
;
5865 if (got_type
!= GOT_TYPE_STANDARD
)
5869 gold_assert(gsym
->has_got_offset(got_type
));
5870 value
= gsym
->got_offset(got_type
);
5874 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5875 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
5876 value
= object
->local_got_offset(r_sym
, got_type
);
5878 value
-= target
->got_section()->got_base_offset(object
);
5880 if (tls_type
== tls::TLSOPT_TO_IE
)
5882 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5883 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5885 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5886 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5887 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
5889 insn
|= 32 << 26; // lwz
5891 insn
|= 58 << 26; // ld
5892 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5894 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5895 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5897 else if (tls_type
== tls::TLSOPT_TO_LE
)
5899 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5900 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5902 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5903 Insn insn
= addis_3_13
;
5906 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5907 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5908 value
= psymval
->value(object
, rela
.get_r_addend());
5912 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5914 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5915 r_type
= elfcpp::R_POWERPC_NONE
;
5919 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5920 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5921 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5922 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5924 // First instruction of a local dynamic sequence, arg setup insn.
5925 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5926 if (tls_type
== tls::TLSOPT_NONE
)
5928 value
= target
->tlsld_got_offset();
5929 value
-= target
->got_section()->got_base_offset(object
);
5933 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5934 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5935 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5937 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5938 Insn insn
= addis_3_13
;
5941 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5942 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5947 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5949 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5950 r_type
= elfcpp::R_POWERPC_NONE
;
5954 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
5955 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
5956 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
5957 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
5959 // Accesses relative to a local dynamic sequence address,
5960 // no optimisation here.
5963 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
5964 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
5968 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5969 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
5970 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
5972 value
-= target
->got_section()->got_base_offset(object
);
5974 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5975 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5976 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5977 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5979 // First instruction of initial exec sequence.
5980 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5981 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5982 if (tls_type
== tls::TLSOPT_NONE
)
5986 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
5987 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
5991 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5992 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
5993 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
5995 value
-= target
->got_section()->got_base_offset(object
);
5999 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6000 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6001 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6003 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6004 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6005 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
6010 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6011 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6012 value
= psymval
->value(object
, rela
.get_r_addend());
6016 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6018 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6019 r_type
= elfcpp::R_POWERPC_NONE
;
6023 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6024 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6026 // Second instruction of a global dynamic sequence,
6027 // the __tls_get_addr call
6028 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6029 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6030 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6031 if (tls_type
!= tls::TLSOPT_NONE
)
6033 if (tls_type
== tls::TLSOPT_TO_IE
)
6035 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6036 Insn insn
= add_3_3_13
;
6039 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6040 r_type
= elfcpp::R_POWERPC_NONE
;
6044 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6045 Insn insn
= addi_3_3
;
6046 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6047 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6048 view
+= 2 * big_endian
;
6049 value
= psymval
->value(object
, rela
.get_r_addend());
6051 this->skip_next_tls_get_addr_call();
6054 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6055 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6057 // Second instruction of a local dynamic sequence,
6058 // the __tls_get_addr call
6059 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6060 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6061 if (tls_type
== tls::TLSOPT_TO_LE
)
6063 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6064 Insn insn
= addi_3_3
;
6065 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6066 this->skip_next_tls_get_addr_call();
6067 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6068 view
+= 2 * big_endian
;
6072 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6074 // Second instruction of an initial exec sequence
6075 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6076 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6077 if (tls_type
== tls::TLSOPT_TO_LE
)
6079 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6080 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6081 unsigned int reg
= size
== 32 ? 2 : 13;
6082 insn
= at_tls_transform(insn
, reg
);
6083 gold_assert(insn
!= 0);
6084 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6085 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6086 view
+= 2 * big_endian
;
6087 value
= psymval
->value(object
, rela
.get_r_addend());
6090 else if (!has_plt_value
)
6093 unsigned int dest_shndx
;
6094 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
6095 addend
= rela
.get_r_addend();
6096 value
= psymval
->value(object
, addend
);
6097 if (size
== 64 && is_branch_reloc(r_type
))
6098 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
6099 unsigned int max_branch_offset
= 0;
6100 if (r_type
== elfcpp::R_POWERPC_REL24
6101 || r_type
== elfcpp::R_PPC_PLTREL24
6102 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
6103 max_branch_offset
= 1 << 25;
6104 else if (r_type
== elfcpp::R_POWERPC_REL14
6105 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
6106 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
6107 max_branch_offset
= 1 << 15;
6108 if (max_branch_offset
!= 0
6109 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
6111 Stub_table
<size
, big_endian
>* stub_table
6112 = object
->stub_table(relinfo
->data_shndx
);
6113 gold_assert(stub_table
!= NULL
);
6114 Address off
= stub_table
->find_long_branch_entry(object
, value
);
6115 if (off
!= invalid_address
)
6116 value
= stub_table
->stub_address() + stub_table
->plt_size() + off
;
6122 case elfcpp::R_PPC64_REL64
:
6123 case elfcpp::R_POWERPC_REL32
:
6124 case elfcpp::R_POWERPC_REL24
:
6125 case elfcpp::R_PPC_PLTREL24
:
6126 case elfcpp::R_PPC_LOCAL24PC
:
6127 case elfcpp::R_POWERPC_REL16
:
6128 case elfcpp::R_POWERPC_REL16_LO
:
6129 case elfcpp::R_POWERPC_REL16_HI
:
6130 case elfcpp::R_POWERPC_REL16_HA
:
6131 case elfcpp::R_POWERPC_REL14
:
6132 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6133 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6137 case elfcpp::R_PPC64_TOC16
:
6138 case elfcpp::R_PPC64_TOC16_LO
:
6139 case elfcpp::R_PPC64_TOC16_HI
:
6140 case elfcpp::R_PPC64_TOC16_HA
:
6141 case elfcpp::R_PPC64_TOC16_DS
:
6142 case elfcpp::R_PPC64_TOC16_LO_DS
:
6143 // Subtract the TOC base address.
6144 value
-= (target
->got_section()->output_section()->address()
6145 + object
->toc_base_offset());
6148 case elfcpp::R_POWERPC_SECTOFF
:
6149 case elfcpp::R_POWERPC_SECTOFF_LO
:
6150 case elfcpp::R_POWERPC_SECTOFF_HI
:
6151 case elfcpp::R_POWERPC_SECTOFF_HA
:
6152 case elfcpp::R_PPC64_SECTOFF_DS
:
6153 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6155 value
-= os
->address();
6158 case elfcpp::R_PPC64_TPREL16_DS
:
6159 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6161 // R_PPC_TLSGD and R_PPC_TLSLD
6163 case elfcpp::R_POWERPC_TPREL16
:
6164 case elfcpp::R_POWERPC_TPREL16_LO
:
6165 case elfcpp::R_POWERPC_TPREL16_HI
:
6166 case elfcpp::R_POWERPC_TPREL16_HA
:
6167 case elfcpp::R_POWERPC_TPREL
:
6168 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6169 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6170 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6171 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6172 // tls symbol values are relative to tls_segment()->vaddr()
6176 case elfcpp::R_PPC64_DTPREL16_DS
:
6177 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6178 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6179 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6180 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6181 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6183 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6184 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6186 case elfcpp::R_POWERPC_DTPREL16
:
6187 case elfcpp::R_POWERPC_DTPREL16_LO
:
6188 case elfcpp::R_POWERPC_DTPREL16_HI
:
6189 case elfcpp::R_POWERPC_DTPREL16_HA
:
6190 case elfcpp::R_POWERPC_DTPREL
:
6191 // tls symbol values are relative to tls_segment()->vaddr()
6192 value
-= dtp_offset
;
6199 Insn branch_bit
= 0;
6202 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6203 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6204 branch_bit
= 1 << 21;
6205 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6206 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6208 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6209 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6212 if (this->is_isa_v2
)
6214 // Set 'a' bit. This is 0b00010 in BO field for branch
6215 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6216 // for branch on CTR insns (BO == 1a00t or 1a01t).
6217 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6219 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6226 // Invert 'y' bit if not the default.
6227 if (static_cast<Signed_address
>(value
) < 0)
6230 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6240 // Multi-instruction sequences that access the TOC can be
6241 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6242 // to nop; addi rb,r2,x;
6248 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6249 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6250 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6251 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6252 case elfcpp::R_POWERPC_GOT16_HA
:
6253 case elfcpp::R_PPC64_TOC16_HA
:
6254 if (parameters
->options().toc_optimize())
6256 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6257 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6258 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6259 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6260 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6261 _("toc optimization is not supported "
6262 "for %#08x instruction"), insn
);
6263 else if (value
+ 0x8000 < 0x10000)
6265 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6271 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6272 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6273 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6274 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6275 case elfcpp::R_POWERPC_GOT16_LO
:
6276 case elfcpp::R_PPC64_GOT16_LO_DS
:
6277 case elfcpp::R_PPC64_TOC16_LO
:
6278 case elfcpp::R_PPC64_TOC16_LO_DS
:
6279 if (parameters
->options().toc_optimize())
6281 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6282 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6283 if (!ok_lo_toc_insn(insn
))
6284 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6285 _("toc optimization is not supported "
6286 "for %#08x instruction"), insn
);
6287 else if (value
+ 0x8000 < 0x10000)
6289 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6291 // Transform addic to addi when we change reg.
6292 insn
&= ~((0x3f << 26) | (0x1f << 16));
6293 insn
|= (14u << 26) | (2 << 16);
6297 insn
&= ~(0x1f << 16);
6300 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6307 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6310 case elfcpp::R_POWERPC_ADDR32
:
6311 case elfcpp::R_POWERPC_UADDR32
:
6313 overflow
= Reloc::CHECK_BITFIELD
;
6316 case elfcpp::R_POWERPC_REL32
:
6318 overflow
= Reloc::CHECK_SIGNED
;
6321 case elfcpp::R_POWERPC_ADDR24
:
6322 case elfcpp::R_POWERPC_ADDR16
:
6323 case elfcpp::R_POWERPC_UADDR16
:
6324 case elfcpp::R_PPC64_ADDR16_DS
:
6325 case elfcpp::R_POWERPC_ADDR14
:
6326 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6327 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6328 overflow
= Reloc::CHECK_BITFIELD
;
6331 case elfcpp::R_POWERPC_REL24
:
6332 case elfcpp::R_PPC_PLTREL24
:
6333 case elfcpp::R_PPC_LOCAL24PC
:
6334 case elfcpp::R_POWERPC_REL16
:
6335 case elfcpp::R_PPC64_TOC16
:
6336 case elfcpp::R_POWERPC_GOT16
:
6337 case elfcpp::R_POWERPC_SECTOFF
:
6338 case elfcpp::R_POWERPC_TPREL16
:
6339 case elfcpp::R_POWERPC_DTPREL16
:
6340 case elfcpp::R_PPC64_TPREL16_DS
:
6341 case elfcpp::R_PPC64_DTPREL16_DS
:
6342 case elfcpp::R_PPC64_TOC16_DS
:
6343 case elfcpp::R_PPC64_GOT16_DS
:
6344 case elfcpp::R_PPC64_SECTOFF_DS
:
6345 case elfcpp::R_POWERPC_REL14
:
6346 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6347 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6348 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6349 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6350 case elfcpp::R_POWERPC_GOT_TPREL16
:
6351 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6352 overflow
= Reloc::CHECK_SIGNED
;
6356 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6357 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6360 case elfcpp::R_POWERPC_NONE
:
6361 case elfcpp::R_POWERPC_TLS
:
6362 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6363 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6364 case elfcpp::R_PPC_EMB_MRKREF
:
6367 case elfcpp::R_PPC64_ADDR64
:
6368 case elfcpp::R_PPC64_REL64
:
6369 case elfcpp::R_PPC64_TOC
:
6370 Reloc::addr64(view
, value
);
6373 case elfcpp::R_POWERPC_TPREL
:
6374 case elfcpp::R_POWERPC_DTPREL
:
6376 Reloc::addr64(view
, value
);
6378 status
= Reloc::addr32(view
, value
, overflow
);
6381 case elfcpp::R_PPC64_UADDR64
:
6382 Reloc::addr64_u(view
, value
);
6385 case elfcpp::R_POWERPC_ADDR32
:
6386 status
= Reloc::addr32(view
, value
, overflow
);
6389 case elfcpp::R_POWERPC_REL32
:
6390 case elfcpp::R_POWERPC_UADDR32
:
6391 status
= Reloc::addr32_u(view
, value
, overflow
);
6394 case elfcpp::R_POWERPC_ADDR24
:
6395 case elfcpp::R_POWERPC_REL24
:
6396 case elfcpp::R_PPC_PLTREL24
:
6397 case elfcpp::R_PPC_LOCAL24PC
:
6398 status
= Reloc::addr24(view
, value
, overflow
);
6401 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6402 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6405 status
= Reloc::addr16_ds(view
, value
, overflow
);
6408 case elfcpp::R_POWERPC_ADDR16
:
6409 case elfcpp::R_POWERPC_REL16
:
6410 case elfcpp::R_PPC64_TOC16
:
6411 case elfcpp::R_POWERPC_GOT16
:
6412 case elfcpp::R_POWERPC_SECTOFF
:
6413 case elfcpp::R_POWERPC_TPREL16
:
6414 case elfcpp::R_POWERPC_DTPREL16
:
6415 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6416 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6417 case elfcpp::R_POWERPC_GOT_TPREL16
:
6418 case elfcpp::R_POWERPC_ADDR16_LO
:
6419 case elfcpp::R_POWERPC_REL16_LO
:
6420 case elfcpp::R_PPC64_TOC16_LO
:
6421 case elfcpp::R_POWERPC_GOT16_LO
:
6422 case elfcpp::R_POWERPC_SECTOFF_LO
:
6423 case elfcpp::R_POWERPC_TPREL16_LO
:
6424 case elfcpp::R_POWERPC_DTPREL16_LO
:
6425 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6426 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6427 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6428 status
= Reloc::addr16(view
, value
, overflow
);
6431 case elfcpp::R_POWERPC_UADDR16
:
6432 status
= Reloc::addr16_u(view
, value
, overflow
);
6435 case elfcpp::R_POWERPC_ADDR16_HI
:
6436 case elfcpp::R_POWERPC_REL16_HI
:
6437 case elfcpp::R_PPC64_TOC16_HI
:
6438 case elfcpp::R_POWERPC_GOT16_HI
:
6439 case elfcpp::R_POWERPC_SECTOFF_HI
:
6440 case elfcpp::R_POWERPC_TPREL16_HI
:
6441 case elfcpp::R_POWERPC_DTPREL16_HI
:
6442 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6443 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6444 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6445 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6446 Reloc::addr16_hi(view
, value
);
6449 case elfcpp::R_POWERPC_ADDR16_HA
:
6450 case elfcpp::R_POWERPC_REL16_HA
:
6451 case elfcpp::R_PPC64_TOC16_HA
:
6452 case elfcpp::R_POWERPC_GOT16_HA
:
6453 case elfcpp::R_POWERPC_SECTOFF_HA
:
6454 case elfcpp::R_POWERPC_TPREL16_HA
:
6455 case elfcpp::R_POWERPC_DTPREL16_HA
:
6456 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6457 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6458 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6459 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6460 Reloc::addr16_ha(view
, value
);
6463 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6465 // R_PPC_EMB_NADDR16_LO
6467 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6468 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6469 Reloc::addr16_hi2(view
, value
);
6472 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6474 // R_PPC_EMB_NADDR16_HI
6476 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6477 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6478 Reloc::addr16_ha2(view
, value
);
6481 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6483 // R_PPC_EMB_NADDR16_HA
6485 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6486 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6487 Reloc::addr16_hi3(view
, value
);
6490 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6494 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6495 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6496 Reloc::addr16_ha3(view
, value
);
6499 case elfcpp::R_PPC64_DTPREL16_DS
:
6500 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6502 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6504 case elfcpp::R_PPC64_TPREL16_DS
:
6505 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6507 // R_PPC_TLSGD, R_PPC_TLSLD
6509 case elfcpp::R_PPC64_ADDR16_DS
:
6510 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6511 case elfcpp::R_PPC64_TOC16_DS
:
6512 case elfcpp::R_PPC64_TOC16_LO_DS
:
6513 case elfcpp::R_PPC64_GOT16_DS
:
6514 case elfcpp::R_PPC64_GOT16_LO_DS
:
6515 case elfcpp::R_PPC64_SECTOFF_DS
:
6516 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6517 status
= Reloc::addr16_ds(view
, value
, overflow
);
6520 case elfcpp::R_POWERPC_ADDR14
:
6521 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6522 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6523 case elfcpp::R_POWERPC_REL14
:
6524 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6525 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6526 status
= Reloc::addr14(view
, value
, overflow
);
6529 case elfcpp::R_POWERPC_COPY
:
6530 case elfcpp::R_POWERPC_GLOB_DAT
:
6531 case elfcpp::R_POWERPC_JMP_SLOT
:
6532 case elfcpp::R_POWERPC_RELATIVE
:
6533 case elfcpp::R_POWERPC_DTPMOD
:
6534 case elfcpp::R_PPC64_JMP_IREL
:
6535 case elfcpp::R_POWERPC_IRELATIVE
:
6536 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6537 _("unexpected reloc %u in object file"),
6541 case elfcpp::R_PPC_EMB_SDA21
:
6546 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6550 case elfcpp::R_PPC_EMB_SDA2I16
:
6551 case elfcpp::R_PPC_EMB_SDA2REL
:
6554 // R_PPC64_TLSGD, R_PPC64_TLSLD
6557 case elfcpp::R_POWERPC_PLT32
:
6558 case elfcpp::R_POWERPC_PLTREL32
:
6559 case elfcpp::R_POWERPC_PLT16_LO
:
6560 case elfcpp::R_POWERPC_PLT16_HI
:
6561 case elfcpp::R_POWERPC_PLT16_HA
:
6562 case elfcpp::R_PPC_SDAREL16
:
6563 case elfcpp::R_POWERPC_ADDR30
:
6564 case elfcpp::R_PPC64_PLT64
:
6565 case elfcpp::R_PPC64_PLTREL64
:
6566 case elfcpp::R_PPC64_PLTGOT16
:
6567 case elfcpp::R_PPC64_PLTGOT16_LO
:
6568 case elfcpp::R_PPC64_PLTGOT16_HI
:
6569 case elfcpp::R_PPC64_PLTGOT16_HA
:
6570 case elfcpp::R_PPC64_PLT16_LO_DS
:
6571 case elfcpp::R_PPC64_PLTGOT16_DS
:
6572 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
6573 case elfcpp::R_PPC_EMB_RELSEC16
:
6574 case elfcpp::R_PPC_EMB_RELST_LO
:
6575 case elfcpp::R_PPC_EMB_RELST_HI
:
6576 case elfcpp::R_PPC_EMB_RELST_HA
:
6577 case elfcpp::R_PPC_EMB_BIT_FLD
:
6578 case elfcpp::R_PPC_EMB_RELSDA
:
6579 case elfcpp::R_PPC_TOC16
:
6582 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6583 _("unsupported reloc %u"),
6587 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
6588 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6589 _("relocation overflow"));
6594 // Relocate section data.
6596 template<int size
, bool big_endian
>
6598 Target_powerpc
<size
, big_endian
>::relocate_section(
6599 const Relocate_info
<size
, big_endian
>* relinfo
,
6600 unsigned int sh_type
,
6601 const unsigned char* prelocs
,
6603 Output_section
* output_section
,
6604 bool needs_special_offset_handling
,
6605 unsigned char* view
,
6607 section_size_type view_size
,
6608 const Reloc_symbol_changes
* reloc_symbol_changes
)
6610 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6611 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
6612 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
6613 Powerpc_comdat_behavior
;
6615 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6617 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
6618 Powerpc_relocate
, Powerpc_comdat_behavior
>(
6624 needs_special_offset_handling
,
6628 reloc_symbol_changes
);
6631 class Powerpc_scan_relocatable_reloc
6634 // Return the strategy to use for a local symbol which is not a
6635 // section symbol, given the relocation type.
6636 inline Relocatable_relocs::Reloc_strategy
6637 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
6639 if (r_type
== 0 && r_sym
== 0)
6640 return Relocatable_relocs::RELOC_DISCARD
;
6641 return Relocatable_relocs::RELOC_COPY
;
6644 // Return the strategy to use for a local symbol which is a section
6645 // symbol, given the relocation type.
6646 inline Relocatable_relocs::Reloc_strategy
6647 local_section_strategy(unsigned int, Relobj
*)
6649 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
6652 // Return the strategy to use for a global symbol, given the
6653 // relocation type, the object, and the symbol index.
6654 inline Relocatable_relocs::Reloc_strategy
6655 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
6657 if (r_type
== elfcpp::R_PPC_PLTREL24
)
6658 return Relocatable_relocs::RELOC_SPECIAL
;
6659 return Relocatable_relocs::RELOC_COPY
;
6663 // Scan the relocs during a relocatable link.
6665 template<int size
, bool big_endian
>
6667 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
6668 Symbol_table
* symtab
,
6670 Sized_relobj_file
<size
, big_endian
>* object
,
6671 unsigned int data_shndx
,
6672 unsigned int sh_type
,
6673 const unsigned char* prelocs
,
6675 Output_section
* output_section
,
6676 bool needs_special_offset_handling
,
6677 size_t local_symbol_count
,
6678 const unsigned char* plocal_symbols
,
6679 Relocatable_relocs
* rr
)
6681 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6683 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
6684 Powerpc_scan_relocatable_reloc
>(
6692 needs_special_offset_handling
,
6698 // Emit relocations for a section.
6699 // This is a modified version of the function by the same name in
6700 // target-reloc.h. Using relocate_special_relocatable for
6701 // R_PPC_PLTREL24 would require duplication of the entire body of the
6702 // loop, so we may as well duplicate the whole thing.
6704 template<int size
, bool big_endian
>
6706 Target_powerpc
<size
, big_endian
>::relocate_relocs(
6707 const Relocate_info
<size
, big_endian
>* relinfo
,
6708 unsigned int sh_type
,
6709 const unsigned char* prelocs
,
6711 Output_section
* output_section
,
6712 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
6713 const Relocatable_relocs
* rr
,
6715 Address view_address
,
6717 unsigned char* reloc_view
,
6718 section_size_type reloc_view_size
)
6720 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6722 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
6724 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
6726 const int reloc_size
6727 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
6729 Powerpc_relobj
<size
, big_endian
>* const object
6730 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6731 const unsigned int local_count
= object
->local_symbol_count();
6732 unsigned int got2_shndx
= object
->got2_shndx();
6733 Address got2_addend
= 0;
6734 if (got2_shndx
!= 0)
6736 got2_addend
= object
->get_output_section_offset(got2_shndx
);
6737 gold_assert(got2_addend
!= invalid_address
);
6740 unsigned char* pwrite
= reloc_view
;
6741 bool zap_next
= false;
6742 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
6744 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
6745 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
6748 Reltype
reloc(prelocs
);
6749 Reltype_write
reloc_write(pwrite
);
6751 Address offset
= reloc
.get_r_offset();
6752 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
6753 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
6754 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
6755 const unsigned int orig_r_sym
= r_sym
;
6756 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
6757 = reloc
.get_r_addend();
6758 const Symbol
* gsym
= NULL
;
6762 // We could arrange to discard these and other relocs for
6763 // tls optimised sequences in the strategy methods, but for
6764 // now do as BFD ld does.
6765 r_type
= elfcpp::R_POWERPC_NONE
;
6769 // Get the new symbol index.
6770 if (r_sym
< local_count
)
6774 case Relocatable_relocs::RELOC_COPY
:
6775 case Relocatable_relocs::RELOC_SPECIAL
:
6778 r_sym
= object
->symtab_index(r_sym
);
6779 gold_assert(r_sym
!= -1U);
6783 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
6785 // We are adjusting a section symbol. We need to find
6786 // the symbol table index of the section symbol for
6787 // the output section corresponding to input section
6788 // in which this symbol is defined.
6789 gold_assert(r_sym
< local_count
);
6791 unsigned int shndx
=
6792 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
6793 gold_assert(is_ordinary
);
6794 Output_section
* os
= object
->output_section(shndx
);
6795 gold_assert(os
!= NULL
);
6796 gold_assert(os
->needs_symtab_index());
6797 r_sym
= os
->symtab_index();
6807 gsym
= object
->global_symbol(r_sym
);
6808 gold_assert(gsym
!= NULL
);
6809 if (gsym
->is_forwarder())
6810 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
6812 gold_assert(gsym
->has_symtab_index());
6813 r_sym
= gsym
->symtab_index();
6816 // Get the new offset--the location in the output section where
6817 // this relocation should be applied.
6818 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6819 offset
+= offset_in_output_section
;
6822 section_offset_type sot_offset
=
6823 convert_types
<section_offset_type
, Address
>(offset
);
6824 section_offset_type new_sot_offset
=
6825 output_section
->output_offset(object
, relinfo
->data_shndx
,
6827 gold_assert(new_sot_offset
!= -1);
6828 offset
= new_sot_offset
;
6831 // In an object file, r_offset is an offset within the section.
6832 // In an executable or dynamic object, generated by
6833 // --emit-relocs, r_offset is an absolute address.
6834 if (!parameters
->options().relocatable())
6836 offset
+= view_address
;
6837 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6838 offset
-= offset_in_output_section
;
6841 // Handle the reloc addend based on the strategy.
6842 if (strategy
== Relocatable_relocs::RELOC_COPY
)
6844 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
6846 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
6847 addend
= psymval
->value(object
, addend
);
6849 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
6851 if (addend
>= 32768)
6852 addend
+= got2_addend
;
6857 if (!parameters
->options().relocatable())
6859 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6860 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6861 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6862 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6864 // First instruction of a global dynamic sequence,
6866 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6867 switch (this->optimize_tls_gd(final
))
6869 case tls::TLSOPT_TO_IE
:
6870 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6871 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6873 case tls::TLSOPT_TO_LE
:
6874 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6875 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6876 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6879 r_type
= elfcpp::R_POWERPC_NONE
;
6880 offset
-= 2 * big_endian
;
6887 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6888 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6889 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6890 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6892 // First instruction of a local dynamic sequence,
6894 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6896 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6897 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6899 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6900 const Output_section
* os
= relinfo
->layout
->tls_segment()
6902 gold_assert(os
!= NULL
);
6903 gold_assert(os
->needs_symtab_index());
6904 r_sym
= os
->symtab_index();
6905 addend
= dtp_offset
;
6909 r_type
= elfcpp::R_POWERPC_NONE
;
6910 offset
-= 2 * big_endian
;
6914 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6915 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6916 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6917 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6919 // First instruction of initial exec sequence.
6920 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6921 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6923 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6924 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6925 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6928 r_type
= elfcpp::R_POWERPC_NONE
;
6929 offset
-= 2 * big_endian
;
6933 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6934 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6936 // Second instruction of a global dynamic sequence,
6937 // the __tls_get_addr call
6938 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6939 switch (this->optimize_tls_gd(final
))
6941 case tls::TLSOPT_TO_IE
:
6942 r_type
= elfcpp::R_POWERPC_NONE
;
6945 case tls::TLSOPT_TO_LE
:
6946 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6947 offset
+= 2 * big_endian
;
6954 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6955 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6957 // Second instruction of a local dynamic sequence,
6958 // the __tls_get_addr call
6959 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6961 const Output_section
* os
= relinfo
->layout
->tls_segment()
6963 gold_assert(os
!= NULL
);
6964 gold_assert(os
->needs_symtab_index());
6965 r_sym
= os
->symtab_index();
6966 addend
= dtp_offset
;
6967 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6968 offset
+= 2 * big_endian
;
6972 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6974 // Second instruction of an initial exec sequence
6975 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6976 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6978 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6979 offset
+= 2 * big_endian
;
6984 reloc_write
.put_r_offset(offset
);
6985 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
6986 reloc_write
.put_r_addend(addend
);
6988 pwrite
+= reloc_size
;
6991 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
6992 == reloc_view_size
);
6995 // Return the value to use for a dynamic symbol which requires special
6996 // treatment. This is how we support equality comparisons of function
6997 // pointers across shared library boundaries, as described in the
6998 // processor specific ABI supplement.
7000 template<int size
, bool big_endian
>
7002 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
7006 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
7007 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7008 p
!= this->stub_tables_
.end();
7011 Address off
= (*p
)->find_plt_call_entry(gsym
);
7012 if (off
!= invalid_address
)
7013 return (*p
)->stub_address() + off
;
7019 // Return the PLT address to use for a local symbol.
7020 template<int size
, bool big_endian
>
7022 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
7023 const Relobj
* object
,
7024 unsigned int symndx
) const
7028 const Sized_relobj
<size
, big_endian
>* relobj
7029 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
7030 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7031 p
!= this->stub_tables_
.end();
7034 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
7036 if (off
!= invalid_address
)
7037 return (*p
)->stub_address() + off
;
7043 // Return the PLT address to use for a global symbol.
7044 template<int size
, bool big_endian
>
7046 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
7047 const Symbol
* gsym
) const
7051 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7052 p
!= this->stub_tables_
.end();
7055 Address off
= (*p
)->find_plt_call_entry(gsym
);
7056 if (off
!= invalid_address
)
7057 return (*p
)->stub_address() + off
;
7063 // Return the offset to use for the GOT_INDX'th got entry which is
7064 // for a local tls symbol specified by OBJECT, SYMNDX.
7065 template<int size
, bool big_endian
>
7067 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
7068 const Relobj
* object
,
7069 unsigned int symndx
,
7070 unsigned int got_indx
) const
7072 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7073 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
7074 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
7076 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7077 got_type
<= GOT_TYPE_TPREL
;
7078 got_type
= Got_type(got_type
+ 1))
7079 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
7081 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
7082 if (got_type
== GOT_TYPE_TLSGD
)
7084 if (off
== got_indx
* (size
/ 8))
7086 if (got_type
== GOT_TYPE_TPREL
)
7096 // Return the offset to use for the GOT_INDX'th got entry which is
7097 // for global tls symbol GSYM.
7098 template<int size
, bool big_endian
>
7100 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
7102 unsigned int got_indx
) const
7104 if (gsym
->type() == elfcpp::STT_TLS
)
7106 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7107 got_type
<= GOT_TYPE_TPREL
;
7108 got_type
= Got_type(got_type
+ 1))
7109 if (gsym
->has_got_offset(got_type
))
7111 unsigned int off
= gsym
->got_offset(got_type
);
7112 if (got_type
== GOT_TYPE_TLSGD
)
7114 if (off
== got_indx
* (size
/ 8))
7116 if (got_type
== GOT_TYPE_TPREL
)
7126 // The selector for powerpc object files.
7128 template<int size
, bool big_endian
>
7129 class Target_selector_powerpc
: public Target_selector
7132 Target_selector_powerpc()
7133 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
7136 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
7137 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
7139 ? (big_endian
? "elf64ppc" : "elf64lppc")
7140 : (big_endian
? "elf32ppc" : "elf32lppc")))
7144 do_instantiate_target()
7145 { return new Target_powerpc
<size
, big_endian
>(); }
7148 Target_selector_powerpc
<32, true> target_selector_ppc32
;
7149 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
7150 Target_selector_powerpc
<64, true> target_selector_ppc64
;
7151 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
7153 // Instantiate these constants for -O0
7154 template<int size
, bool big_endian
>
7155 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
7156 template<int size
, bool big_endian
>
7157 const typename Stub_table
<size
, big_endian
>::Address
7158 Stub_table
<size
, big_endian
>::invalid_address
;
7159 template<int size
, bool big_endian
>
7160 const typename Target_powerpc
<size
, big_endian
>::Address
7161 Target_powerpc
<size
, big_endian
>::invalid_address
;
7163 } // End anonymous namespace.